I. Overview of the Project

1) This project is a sidewalk and greening project on the north side of XXX Middle Road (Tianma Bridge-Fuxing Road) in Liuyang City, including road greening (except street trees), sidewalk laying and kerb installation. Duration requirements: 40 calendar days.

Second, the preparation instructions

First of all, thank you very much for the bidding opportunity provided by the owner. Changsha Jiu Feng Construction Engineering Co., Ltd. pursues the perfection of the project with a sincere and responsible attitude towards the owner. After careful on-site reconnaissance and bid evaluation, combined with the actual project, this construction organization design has been compiled. The purpose of this construction organization design is to provide a relatively complete programmatic document for the bidding stage according to the overall construction situation and various specific construction conditions. Once winning the bid, it will be deepened on this basis to guide the project construction and management.

Third, the main basis

The construction organization design is mainly based on the following data and documents:

1, bidding documents for sidewalk and greening project on the north side of XXX Middle Road (Tianma Bridge-Fuxing Road) in Liuyang City;

2. Design drawings and relevant design documents of sidewalk and greening project on the north side of XXX Middle Road (Tianma Bridge-Fuxing Road) in Liuyang City;

3. Code for construction and acceptance of urban greening projects;

4. Plant materials for urban greening and landscaping;

5. Regulations on quality management of construction projects;

6. Technical Specifications for Landscaping (Trial)

7. Specification for Preservation of Landscaping

Eight, other relevant construction and acceptance specifications and standards;

Fourth, the construction organization plan and deployment

The first section deployment principles

1, concentrate on ensuring the quality and time limit for a project, fully guarantee the project in terms of manpower, materials, machines and tools, and assist each other in the management of each process, guide the on-site construction work, and do a good job in the coordination of each type of work.

2, organize each type of work to cooperate with the construction, interspersed with homework, and focus on key parts. Create construction conditions for greening, installation and other jobs to ensure the overall progress of the project.

Section 2 Construction Organization

The project manager will be responsible for the construction site coordination and arrangement of the construction teams of various disciplines. Grasp the work

Quality and safety, while grasping the requirements of environmental protection.

Section 3 Construction Management Measures

In order to successfully achieve the quality objectives,

The main management measures we have taken are:

1, this project is listed as the key project of our company, which is directly led by the general manager of the company, and the construction site management organization is established to give full play to the advantages of the company, and the key deployment is carried out for the configuration of various construction production factors to ensure the smooth completion of the project.

2. Establish a lean, efficient and powerful project management department, select high-quality project managers and managers, implement the project management responsibility system, comprehensively organize technical, quality inspection, materials, safety, labor and finance departments to carry out all-round, all-round and whole-process systematic dynamic management of engineering construction, and carry out all-round target responsibility management and control of engineering quality, construction progress, safe production, civilized construction, cost accounting and economic benefits.

3, equipped with skilled, disciplined, tempered by a number of large-scale projects of high-quality operation team, in the project construction, give full play to our company's management advantages, strengthen functions, overall coordination, comprehensive management, to ensure the realization of the overall goal of the project.

The fourth quarter construction scheme

Construction preparation work

First, have a good relationship with the design unit.

1, the technical director shall assist the relevant personnel of the project to be familiar with the drawings carefully, and conduct self-examination and joint examination on the drawings to understand the design intent and construction quality standards, so as to carry out the construction correctly. The construction organization design of this project is carefully compiled by the construction technology group as a guiding document for engineering construction and production.

2, through learning, familiar with the drawing content, understand the design requirements, construction should achieve technical standards, clear process.

3, self-examination, organize the construction management personnel of each type of work to review the related drawings of this type of work, and master and understand the details in the drawings.

4. Organize professional construction teams to study construction drawings and agree on construction cooperation.

5, organize the blue prints.the design, disclosure by the designer, accurately grasp the details in the design drawings. scheduling of production

First, the preparation of labor force

1. Establish project construction management according to the determined site management organization, and select high-quality construction team for project construction.

2. Provide necessary technical, safety, ideological and legal education to workers, educate workers to establish the correct idea of "quality first, safety first", abide by construction and safety technical regulations, and abide by local public security laws and regulations.

Special professional jobs must be trained and certified to ensure the quality of the project. material preparation

1, according to the construction progress plan in the construction organization design and the quantity analysis in the construction budget, prepare the material consumption plan required by the project, do a good job in material preparation and supply, determine the warehouse yard area and organize transportation.

2, according to the material demand plan, do a good job of material application, ordering and purchasing, so that the plan can be implemented. Organize the materials to enter the site as planned and keep them properly.

3, the distribution, use and management of construction materials, formulate strict material acquisition system, do it on demand, according to the construction quantity of the day, to prevent the loss, damage and pollution caused by the material out of the library.

Approaching stage

Carefully investigate the construction site, reasonably select material storage area, production area, tool storage area and waste stacking area, and set up material warehouses where conditions permit, which is convenient for management. Formulate the sequence of on-site operation, without interfering with the construction site of other projects, and reasonably arrange the construction personnel, materials and tools to enter the site according to the construction degree. Organize manpower to do a good job in the civilized environment at the site, prepare for the temporary connection of electric lights, and do the corresponding safety training, technical training, publicity of rules and regulations and communication required by Party A before the construction personnel enter the site, so as to achieve orderly entry. construction stage

According to the project schedule, the project intends to organize and plan the construction. The whole project is divided into green planting, cable pipe embedding, street lamp foundation pouring and green sprinkler irrigation. There are crossover operations at each construction stage. Reasonable arrangement of construction, provide each other with the widest working face. Do a good job in the protection of semi-finished products or finished products, and strengthen the self-inspection work at work. Discovered nonconforming products shall be handled manually in time, and the nonconforming products shall never flow into the next working procedure.

Division of construction tasks: (planting process)

Greening construction process

Block diagram of construction technology of main sub-projects

A, green land leveling, cleaning

(1), the planting surface should be leveled and afforested according to the design requirements, and the sand and gravel weeds and sundries should be removed at the same time.

(2) Along the landform and its surrounding environment should be smooth, and form turtle backs, slopes and other shapes. The slope of off-design terrain should be set at 2.5%-3.0% to facilitate drainage.

(3) All green spaces within the width range of 50- 100 cm on the roadside or kerb are 30CM lower than those on the roadside or kerb, and surface water is led to the municipal drainage well during ground treatment. (4) In addition to meeting the landscape requirements, the surface water should be collected into the municipal engineering pipe network for drainage.

Second, planting soil and base fertilizer

(1), the planting soil is loam with a PH value of 5.5-7.5, which is loose and does not contain construction and domestic garbage.

(2) The requirement of planting soil depth is: the grassland is more than 20 cm; Flowers and shrubs require more than 30cm; Trees are required to have a qualified soil layer greater than 80- 150CM around the planting soil ball.

(3) The planting layer needs to be connected with the underground layer, and there is no partition layer such as cement board, asphalt and gravel layer to keep the soil capillary, liquid and gas connected up and down.

(4) After fertilization, the land is ploughed for 20-30m, and the fertilizer is fully mixed with the soil, so that the fertile soil is thawed, which can not only improve the soil nutrients, but also make the soil loose and well ventilated.

All right. Before planting trees and shrubs, fertile soil should be mixed at the edge of the hole and put into the hole bottom and planting pool in turn.

Third, dig seedlings.

Seedling raising time and planting time should be closely coordinated, so that they can be shipped and planted on the same day. In order to facilitate excavation, the soil can be watered properly 1-3 days before emergence to soften the soil. When raising seedlings, evergreen seedlings should have complete soil balls, and the survival rate of seedlings with soil balls will be reduced. Generally, the size of soil balls can be determined by about 10 times of the DBH of trees, and more soil balls should be considered for particularly difficult tree species. In general, the height of the soil ball is smaller than the width-10CM. In order to reduce the transpiration of seedlings and improve the survival rate of transplanting, rough pruning should be carried out after digging seedlings and before loading seedlings.

Fourth, fixed-point pay-off

(1), before planting seedlings, fixed-point pay-off shall be carried out in strict accordance with the design drawings and minutes of the blue prints.the design.

(2) Trees shall be fixed with tape measure and measuring rope. , and nail a stake as the basis of planting according to the design position. In case of manhole, pipeline and other obstacles, they should be avoided and adjusted flexibly, and the center of each workshop position should be marked with markers such as paint for positioning.

(3), a piece of green space can be fixed-point pay-off with measuring instruments, or pay-off with grid method. First, on the ground, use tools such as tape measure and measuring rope to draw regular squares at equal distances according to the corresponding proportion on the design drawing. The square can be painted with white ash or nailed with hanging lines. Then you can use these grid lines as vertical and horizontal coordinates, make correct fixed-point positioning on the ground, mark it with wooden stakes or sprinkle white ash. Guarantee release

The position of the line is accurate, the line is smooth, and the area and size are qualified.

Verb (short for verb) digs a hole.

(1), the acupoint selection is accurate, and the length, width and height meet the requirements. Before planting seedlings, holes should be dug down around the designated ash point, and the size of the holes depends on the specifications of soil balls and roots. The soil ball should be larger than the soil ball 16-20 cm, and the depth of the hole is generally slightly deeper than the height of the soil ball (10-20 cm). The upper and lower diameters of the holes are the same, and there is no "pot bottom hole" in the holes.

(2) After the planting hole is dug, some topsoil can be filled in the hole, and then a layer of fully decomposed base fertilizer is padded, and then a layer of loam with a thickness greater than 5cm is paved on the base fertilizer.

(3) Pay attention to the direction of underground pipelines when digging holes. When encountering underground foreign bodies, do "one exploration, two trials and three excavations" to ensure that underground pipelines and structures are not damaged.

Six, transportation of seedlings and planting materials

(1). Ensure that all trees and shrubs keep the soil balls intact, not loose or broken during seedling raising, transportation and planting. The soil balls are uniformly wrapped in grass and wrapped in an "M" shape with hemp rope.

(2), the seedlings are used immediately, that is, the package is planted. Bag seedlings and pot seedlings are transported in stacked mode, and large seedlings are transported in slightly inclined mode.

(3) Maintain a certain amount of moisture during the transportation of seedlings. In the process of long-distance transportation, water should be sprinkled in time, and care should be taken to handle it gently to prevent the mud from loosening.

(4) Planting materials such as organic fertilizer are transported by bulk materials designated by relevant departments.

(5), seedlings, planting materials are allowed to enter the arena after acceptance, and then proceed to the next working procedure.

(6), in the process of seedling transportation, assign personnel to follow the car. It is required to discharge in batches according to different types and sizes. Keep the soil ball of the sapling intact and the bark of the trunk from being damaged.

(7) Seedlings should be planted immediately after they arrive at the construction site to prevent the branches and leaves from losing water and wilting.

Seven, planting

(1), after the seedlings are transported to the construction site, the required seedlings can be moderately pruned and then planted. The planting location should meet the design requirements.

(2) The construction method of planting is: Before planting, base fertilizer and broken soil should be fully mixed, and rows of trees should be arranged in a straight line according to the natural height of planting seedlings. Put the soil ball of the seedling into the planting hole to center it; Then erect and straighten the trunk to keep it vertical; Then fill the pit in layers, so that the soil surface covers the root and neck of the tree. After initial planting, check whether the trunk is still vertical and whether the crown is skewed. If there is any deviation, it must be corrected again. While strengthening trees, planting soil should be added. Planting soil should be compacted with wooden sticks in layers to make the root system fully contact with the soil. Finally, the remaining hole soil is cultivated around the root neck to make an annular water retaining cofferdam. The diameter of cofferdam should be slightly larger than the diameter of planting hole. Weir soil should be compacted and not loose.

(3) If necessary, support it after planting, and water it for the first time within 24 hours after planting, so that the soil can fully absorb water, and the root system is closely combined with the soil, which is beneficial to root system development. Water for the second time after 3-5 days, and water for the third time after 7-8 days.

(4) The street trees can be supported by concrete columns after planting. The specific specifications of the stump are: 250* 10* 10CM, 4 φ6 tendons in the column, C20 concrete, 70CM buried depth of the column, 85CM internal spacing, and board specification10 * 8-/kloc-0 * 2.5-3cm..

(5) Trees planted outside the street trees are supported by bamboo, with 3 trees each, with a length of 3-5 meters and a tail diameter greater than 4 cm.

(6) When planting on the ground, it should be planted immediately after the site, starting from the central pattern and then expanding to the edge. When planting single-sided ornamental flower beds, we should start planting from the back and gradually plant in front. If the height of the plant is slightly uneven, the short plant shall prevail, the high plant shall be planted deeper, and the plant spacing shall meet the design requirements.

(7) Pay attention to the consistency of density when planting. All trees should be planted from the inside out, from big to small, first planting trees, then planting shrubs, and then planting lawns.

(8) When planting, pay attention to adjust the orientation of the crown, and face the most beautiful side to the main viewing surface. You also need to adjust the posture of the tree. If the tree is suitable for recumbent and inclined, then the trunk should be planted in a horizontally inclined state. When planting, the tree posture should be treated according to the needs of landscaping. After the tree is planted, it should be supported by concrete columns or bamboo as required, and the roots should be watered.

(9) Level the lawn according to the design elevation, ensure that the soil quality of the green space must meet the requirements of soil quality, clean up sundries, evenly spread base fertilizer after leveling to the required slope, and then generally conduct a ploughing to fully mix the rich soil. In the process of ploughing, if the local soil is found to be insufficient.

Good. You should change the soil. Then continuously sow massive turf, and the seams between grass blocks are less than 2CM. After that, the foot root water is poured, dried and compacted to make it fully contact with the soil. Beat it continuously for more than three times every other day to make the grass firm and smooth. Eight, pruning and shaping

(1), when planting seedlings, pruning before planting is mainly for transportation to reduce water loss; After planting, we should give full consideration to plant landscaping and basic plant morphology, reshape and remove shady branches and diseased branches. And treat the wound. The initial crown shape of seedlings after planting can not only reflect the initial effect, but also help to form a beautiful crown shape in the future to achieve the goal and final effect.

(2) Apply adventitious buds to protect the main branch: the opposite tree, if it is a cut tree, the buds are very irregular after survival. At this time, all adventitious buds should be erased below the designed branch height, and 3 ~ 5 new buds with strong growth points and good growth should be selected above the branch height, which is conducive to the formation of uniform crown width, and the rest should be erased. The rest of the trees and shrubs need to sprout according to the requirements of landscaping, and they are mainly used to form beautiful trees. Nine, the construction site cleaning

After the completion of each subdivisional work, the construction sundries around the construction site should be cleaned up immediately and the road facilities damaged due to negligence in the project should be maintained. Ensure the cleanliness of roads and construction sites, and embody the spirit of civilized construction. At the same time, do a good job in product protection measures. Regularly clean up the surrounding environment of the construction site.

sprinkler irrigation project

1. Excavation: firstly, measure the coordinates and elevation of the pipeline according to the requirements of the construction drawing, and then set out according to the orientation shown in the drawing to determine the position, width and depth of the pipe trench. After that, dig ditches.

2. Pipeline cleaning: clean the impurities in the pipeline bones and check whether there are cracks and sand holes in the pipeline.

3. Positioning and connection of pipes: First, put pipes of various specifications in corresponding grooves, and then connect and install corresponding pipes, fittings and valves. Test:

A, first connect the pressure test device; B, connect the water source, and dig the drain tank; C. Fill the pipeline with water and open the air valve at the same time, the air in the pipeline will be continuously discharged, indicating that the air in the pipeline has been exhausted and can be suppressed after being filled with water. D, check the interface, support and baffle before boosting, and handle problems before boosting. E, booster should be slow, each booster is about 0.2Mpa as well, and should observe whether the interface leaks; If there is no problem, continue to increase the pressure to the active pressure test, stop the pump for inspection, the pressure drop of the pressure gauge shall not exceed 0.05Mpa within 10 minute, and there is no crack in the pipeline, accessories and interface, which proves that the strength test is qualified, and then reduce the pressure to the working pressure for leak test. F, completes the test record, fill in the "hidden engineering record".

5. Flushing and disinfection of the pipeline: Before disinfection, flush the water pipe with high-speed water flow, and select several points at the end of the pipeline to discharge the flushing water. After washing, the discharged water can be disinfected without impurities.

6. Backfilling: Backfilling is not allowed to contain stones with a diameter greater than100 mm. ..

Section 5 kerb installation and construction

Main construction equipment

According to the characteristics of the process to be adopted, and considering the situation of the construction site, the small equipment shown in the following table is proposed:

I) kerb construction technical scheme

Kerbstone construction process:

Installation of grouting kerbs in foundation trench in surveying and setting-out excavation

Leveling and jointing health care

1, measuring unreeling

First of all, according to the drawing design, use total station to measure the sideline of installation kerb, and use level meter to measure the elevation line.

2. Foundation pit excavation

The kerb foundation groove to be installed is excavated and trimmed manually.

3. Hang up the construction control line according to the measuring unreeling point (reinforcement) and start to install kerbs. Make sure the line type is straight and the curve is smooth. When installing kerbs, it is necessary to check kerbs with guiding rule or spirit level while installing, so that they are horizontal and vertical, and ensure roundness and straightness. The straightness of the installed kerb shall not exceed 10 mm every 20m, the height difference between two adjacent blocks shall not exceed 3 mm, the kerb width shall be 10m, and the allowable deviation shall be 3mm.

5, caulking, pointing

After the installation is completed and the inspection is qualified, use 10 # mortar for joint filling, and the mortar must be full and dense.

Then use M 10# cement mortar to tick off the joint, the joint is concave, and the joint depth is 10㎜.

6. Health

Every day, according to the weather conditions, timely health preservation, health preservation period of not less than 7 days.

2), quality inspection

1, quality of raw materials

(1) cement: cement from the same manufacturer, same quality, same serial number and same production date shall be accepted in batches of 200 tons (if it is less than 200 tons, it shall be counted as a batch), and each batch shall be sampled at least once to check the mortar strength, safety, setting time and fineness. If you have doubts about the quality of cement, you can entrust relevant units to do component material analysis tests. If you are in doubt about the quality, please check it at any time.

(2) Water: non-potable water, and the water quality should be checked before use. (3) Aggregate:

Medium sand: medium sand from the same material source and the same mining company, every 200m? When a batch is accepted, each batch shall be sampled at least once, and screening analysis test, apparent specific gravity test, bulk density test and silt content test shall be carried out.

2. Basic requirements for kerb installation quality inspection (1)

Mortar mix ratio is accurate; Kerbs are smooth and tidy. (2) The kerb inspection items are shown in the following table.

Kerbstone inspection items

3), measures to ensure safety

1, strengthen safety education, enhance safety awareness, and construct in strict accordance with safety operation procedures. 2. Establish a safety organization and a safety post responsibility system.

3, the scene set full-time security officer, classes, site construction personnel must wear safety helmets.

4), measures to ensure the engineering quality

1. Carry out total quality management, extensively carry out mass QC group activities, operate according to the quality assurance system, and gradually improve.

2. Conduct technical disclosure, organize relevant construction personnel to train and study, and carry out construction in strict accordance with operating procedures.

3, strict self-inspection system, timely inspection according to the inspection procedures. 4. Technicians and quality inspectors must stand by during the construction.

5. Implement the post responsibility system, assign responsibilities and create posts, and strictly reward and punish according to quality.

5) Measures to ensure civilized construction

1, in strict accordance with the construction specifications and safety operation procedures, put up warning signs at the job site, and it is strictly forbidden to operate illegally and brutally.

2, construction machinery in strict accordance with the safety operation procedures, the operator must hold relevant certificates. 3. The construction site should be planned neatly, the materials should be packed neatly, the transportation roads should be unblocked, and on-site drainage measures should be taken.

4, the construction party has the responsibility to protect the ecological balance of the construction area, put an end to environmental pollution, from sand pollution.

At the time of completion acceptance, every link should consider all kinds of influences on the surrounding environment, and formulate various protective measures according to different problems to ensure that the environment is not polluted and no future trouble will be left. 6), the construction progress control and guarantee the time limit for a project of the main construction measures.

1. The construction period of this project requires 40 days (calendar days). On the premise of ensuring quality and reasonable construction sequence, organize continuous construction when necessary to make full use of limited time.

2, make the time limit for a project control plan; According to the time limit for a project plan determined by the on-site headquarters, self-inspection shall be conducted every day, and time limit analysis shall be conducted once a week to ensure the construction progress.

3, the time limit for a project contract system; Each type of work should be awarded the construction period in advance and punished for delaying the construction period according to the construction task list issued.

4. According to the needs of the construction site, the company will transfer the required skilled workers at any time to ensure the on-site employment.

5, the company set up a special construction leading group, supported and supervised by the general manager of the company or the leaders of relevant departments, and held an on-site office meeting once a week, focusing on checking the implementation of the construction progress plan. If there are any problems, the company's special leading group will propose solutions to ensure that the construction period is completed on time or ahead of schedule.

6, contracting team, if you can't complete the prescribed time limit for a project, the corresponding fine. 7. As a special fund, the project progress payment cannot be used for other expenses of the company.

Cross chart of construction progress

Six, choose the main construction machinery and equipment and approach plan

Seven, labor demand timely appearance plan

Eight, the main component dosage plan