2. In this quota, according to the current tunnel technical regulations, surrounding rocks are divided into soil (Ⅰ and Ⅱ), soft rock (Ⅲ), secondary soft rock (Ⅳ) and hard rock (Ⅴ and Ⅴ) * * *.
3. This quota of manual excavation and mechanical excavation of light rail hopper car transportation project is compiled according to the upper pilot tunnel, expanding excavation and makou excavation, and also integrates the fan-shaped expanding excavation method of the lower pilot tunnel and the material consumption of wood support; The mechanical excavation dump truck transportation project is compiled according to the principle of "new Austrian tunneling method", which integrates the consumption of materials and steel support materials; This quota shall not be changed due to different construction methods when it is used.
4. The project quota in this tunnel is based on the tunnel length within 1000m, that is, the construction working face is within 500m from the hole. If the working face is more than 500m away from the mouth of the cave, the number of working days and mechanical shifts will be increased by 5% according to the corresponding quota for every 500m increase (if it is less than 500m, it will be counted as 500m).
5. Among all kinds of excavation quotas, the distance from the ballasted hole has been comprehensively calculated according to the tunnel length, and it is no longer calculated separately when preparing the budget estimate.
6. The quota of cast-in-place concrete lining and block concrete precast lining includes vault, side wall lining, concrete or mortar rubble backfilling, pipe (water) ditch and tunnel cover plate.
7. When shotcrete is used as lining, the pipe (water) ditch and cover plate in the tunnel can be calculated respectively according to the relevant quota in Budget Quota of Highway Engineering.
8. The engineering contents in the tunnel include the installation, removal and maintenance of lighting, ventilation facilities, pipes and lines required for slag discharge.
9. The electricity consumption of lighting facilities in the tunnel construction has been included in the quota.
10. The provisions of other chapters shall be adopted in tunnel engineering:
(1) The relevant specifications of other chapters shall be adopted for the excavation of the hole foundation, the excavation of the slope and drainage ditch, the open-cut earthwork and the backfilling of the earthwork at the top of the open-cut tunnel. If the ditch cover plate of the tunnel inner pipe (water) needs to be reinforced, the reinforcement quota of small components of reinforcement engineering in the chapter of bridge engineering should be adopted.
(2) If the related projects in other chapters need to be adopted for the in-hole engineering project, the quota of man-days, the number of machine shifts and the use fee of small machines and tools shall be multiplied by the coefficient 1.26.
1 1. This quota does not take into account the cost of special circumstances such as earthquake, collapse, karst cave and a large amount of groundwater treatment, and can be calculated separately according to the design if necessary.
12. Rules for calculation of quantities:
(1) The excavation quantity is calculated according to the design section (tunnel-forming section plus lining section), and the overbreak factor has been considered in the quota, and the overbreak quantity is not included in the engineering quantity.
(2) The number of anchors is the sum of the weights of anchors, pads and nuts.
(3) The amount of sprayed concrete is calculated by multiplying the designed thickness by the sprayed protection area.
(4) The quantities of vault and sidewall are the sum of vault and sidewall (including foundation) lining.
(5) The gate wall is the sum of masonry volumes such as main wall, wing wall and cutoff wall.
(6) The lighting length is the length of the middle line between the entrance and exit of the tunnel.
13. The quota in this chapter does not include the following items, and relevant items in the budget quota of highway engineering can be adopted when necessary.
(1) half tunnel excavation;
(2) Metal mesh and plastic waterproof layer.
Chapter IV Description of Culvert Works
1. This quota is divided into five categories according to common structures: slab culvert, stone arch culvert, reinforced concrete circular culvert, reinforced concrete slab culvert and reinforced concrete box culvert. For other types, it can be compiled with reference to relevant quotas.
2. In order to meet the needs of different situations, in the quota, not only the sub-item quota is compiled according to the culvert body and the mouth of the cave, but also the expanded quota is compiled. General roads should adopt itemized quota compilation as far as possible. When factories, mines and forestry roads cannot provide specific quantities, expanded quota compilation can be adopted.
3. The quota of all kinds of culverts does not include the top and back fill of culverts, culvert pavement and other engineering contents, and this part of the quantities should be included in the quantities of subgrade and pavement.
4. Arch cap, bracket, installation equipment and other ancillary facilities have been included in the culvert quota according to different structures. For the convenience of calculation, all pump shifts required for culvert foundation excavation have been included in the tunnel quota, and the tunnel project is no longer calculated separately.
5. The culvert hole in the quota is calculated according to the general standard hole. In case of special openings, the quota of caves can be calculated according to the number of masonry entities.
6. See the following table for the quantities of culvert, tunnel and inverted siphon tunnel:
Project included in quota name engineering quantity
Paving culvert foundation, pier, cover plate and stone cover plate for culvert bottom.
Stone arch culvert foundation, pier, arch ring, arch protection, culvert bottom paving, balustrade column, handrail (abutment back drainage and waterproof layer have been spread into the quota as ancillary works).
Reinforced concrete slab culvert foundation, pier body, pier cap, cover plate, culvert bottom pavement, supporting beam, concrete bridge deck pavement, railing column and handrail.
Reinforced concrete circular pipe culvert, circular pipe culvert body and terminal base
Reinforced concrete box culvert foundation box culvert, concrete bridge deck pavement, railing column and handrail
Masonry entities such as culvert entrance foundation, wing wall, side wall, cap stone, cone slope paving, roadbed paving on both sides of entrance, river bottom paving, waterproof wall, special water storage well for entrance, rapids, anti-skid wall, stilling basin, falling well and bucket.
Inverted siphon hole well, mud retaining well and water tank
7. The culvert expansion quota is calculated according to the length of each single hole and fixed culvert. If the culvert length is different from the norm, it can be adjusted to double holes by increasing or decreasing the norm 1m, and the adjusted single hole norm can be multiplied by the following factors:
Structural slab culvert reinforced concrete circular tube culvert stone arch culvert reinforced concrete slab culvert
Dual porosity coefficient1.61.81.51.6.
Chapter V Description of Bridge Engineering
1. The quota in this chapter includes the quota of cofferdam island building, foundation engineering, substructure, superstructure and small bridge expansion, etc.
2. The quota of basic engineering, substructure, superstructure and sidewalk in the main project of this chapter is divided into:
(1) foundation engineering: the foundation on natural foundation is below the top surface of foundation; Piling and cast-in-place pile foundation is below the bottom surface of the beam or the top surface of the bearing platform; Open caisson foundation is the whole project below the top surface of well pier cover.
(2) substructure:
Abutment: refers to all works above the top surface of foundation or pile cap, but does not include sidewalks, sidewalks and railings on abutment. If the U-shaped abutment has two layers of capping stones, the second layer is the subordinate abutment and the sidewalk is above it.
Pier: refers to all works above the top surface of foundation or pile cap (column pier is the bottom surface of tie beam) and below the top surface of pier cap or capping beam (arch bridge is arch frame).
Cable tower: all engineering consolidation between tower pier and top surface of foundation or from top surface of bearing platform to top of tower; The tower pier is separated from the top of the bridge deck to the top of the tower, and the part below the top of the bridge deck is calculated according to the pier quota.
(3) Superstructure: the beam-slab bridge refers to the top surface of pier cap or capping beam, and the arch bridge refers to the whole project between the front edge of the front wall of two abutments above the arch frame top and the bottom surface of the sidewalk beam (below the top surface of the second kerb when there is no sidewalk beam), but it does not include bridge deck pavement.
(4) Sidewalks and safety belts: all works above the bottom surface of sidewalk beams or safety belts (above the bottom surface of the first layer of kerbs in the absence of sidewalk beams).
3. In the concrete engineering in this chapter, except the concrete engineering of steel truss bridge, steel suspension bridge deck and the expansion quota of small bridge, the reinforcement and prestress system are not included.
4. Except for track laying, telecommunication power lines, temporary service roads and temporary bridges in this chapter, all kinds of installation equipment, component transportation and site leveling required for other sites are included in the quota, cantilever box girder is also included in the pier of the trestle, and cantilever box girder is also included in the concrete mixing station on board, so it is not calculated separately when compiling the budget estimate.
5. The concrete in the quota is prepared by dispersing and stirring with a 250L mixer. If the total amount of concrete in a project is large and it is necessary to use a concrete mixing station for centralized mixing construction, the project of "concrete mixing station" can be added, and 4 man-days and other material expenses and the total number of 250L mixer shifts should be deducted for each 10m3 concrete in the relevant quota.
6. The concrete in this quota is regarded as outdoor maintenance. If steam curing is adopted, the 4 yuan of materials such as 10m3 will be deducted from the relevant quota, and the steam curing cost will be calculated according to the relevant quota in the budget quota.
7. The concrete works in the quota have included the concrete transportation within the operation scope. Except for bridge deck pavement, when the average concrete transportation distance of cast-in-place concrete project exceeds 50m, the concrete transportation can be increased according to the average concrete transportation distance provided by the construction organization design and the quota of "concrete mixing station and concrete transportation".
8. The cost of admixture necessary for concrete in this quota has been included in the cost of other materials in the relevant project quota.
9. Mass concrete engineering quota must use buried cooling pipes to reduce the hydration heat of concrete, which can be calculated separately according to actual needs.
10. The bridge end transition slab of the roadway shall be calculated according to the design quantities and the deck pavement quota. The sidewalk bridge end transition slab has been incorporated into the sidewalk quota, and it is no longer calculated separately when preparing the budget estimate.
1 1. In this chapter, in addition to the sub-item quota, in order to meet the needs of factories, mines and forestry roads, the small bridge expansion quota is also compiled. Under normal circumstances, we should try to make good use of sub-indicators. When the preliminary design of factories, mines and forestry roads cannot provide specific quantities, it can be compiled according to the expanded quota.
12. The quota in this chapter is only the main part of the bridge. As for the water diversion project, river-changing earthwork project and bridge approach project, they are not included in the quota, and shall be calculated separately according to the relevant quota when necessary.
13. General rules of engineering quantity calculation:
(1) The quantities of cast-in-place concrete and precast concrete are the physical volumes of structures or precast members, excluding the volume of hollow parts, and the quantities of reinforced concrete projects are not deducted from the volume of steel bars.
(2) The quantity of reinforcement is the design weight of reinforcement, which has been included in the construction loss. The lap length required for steel bar extension in construction is not included in this quota, but should be calculated in the design weight of steel bar.
The first section foundation engineering
1. Steel sheet pile cofferdam uses common piling machinery to pile on the working platform. The transportation of working platform, other piling auxiliary facilities and steel sheet piles has been included in the quota, and it will not be calculated separately when preparing the budget estimate.
2. The suspended box cofferdam is used to pour the underwater bearing platform, and the original piling (or pouring pile) working platform is used to assemble and sink. The consumption of steel bars and wood buried in the concrete of the bearing platform has been included in the quota.
3. In the quota of foundation pit excavation, dry excavation refers to soil without surface water and above groundwater level; Wet excavation refers to the soil below the construction water level.
4. In the quota of foundation pit excavation, the drainage of foundation pit excavation and the drainage of foundation and pier construction are comprehensively considered according to different covering layers, and the budgetary estimate is not calculated separately.
5. In the caisson foundation quota, the steel shell caisson assembled on board has been included in the assembly project of the assembling ship. The steel shell caisson assembled in the dock does not include the excavation in the dock, which shall be calculated separately according to the excavation quota of the foundation pit. The floating bed lowering quota of steel wire mesh cement thin-walled open caisson has combined launching track construction, track foundation excavation and open caisson launching into one, and it is no longer calculated separately when compiling budget estimate.
6. The labor cost, material cost and mechanical consumption required for hull reinforcement of the guide ship and positioning ship, as well as the anchor rope cost required for open caisson positioning and bed dropping have all been incorporated into the quota of open caisson positioning and bed dropping, and will not be calculated separately when preparing the budget estimate.
7. The quota for the positioning and landing of unguided ships has integrated the labor, materials and machine consumption of the required ground cages and anchorages into the quota, and will not be calculated separately when preparing the budget estimate. If the anchor system is not integrated with the positioning and berthing quota of the guided ship, the budget estimate shall be calculated separately according to the relevant quota.
8. The consumption of anchor chain has been included in the anchor quota, and the consumption of labor, materials and machinery required for anchoring and anchoring has been integrated into the quota. When preparing the budget estimate, the quota shall not be changed at will.
9. The open caisson connection project has been incorporated into the fixed bed falling quota, and it will not be calculated separately when preparing the budget estimate. However, the hoisting equipment required for high connection and the metal equipment required for connection between positioning ships or guiding ships are not included in this quota. When preparing the budget estimate, it should be calculated according to the relevant projects in the budget quota and the actual needs.
10. When the steel shell open caisson is used as a steel cofferdam, the recovery part shall be calculated according to the construction organization design, but the labor cost, material cost and mechanical consumption required for the removal of the recovery part are not included in this quota, and shall be calculated separately according to the actual situation when necessary.
1 1. The piling project is based on the piling machinery commonly used by onshore and underwater platforms and ships, and the transportation of piles, piling accessories and pile joints have been included in the quota, so it will not be calculated separately when compiling the budget estimate.
12. The hole-forming quota of bored pile foundation is compiled according to different drilling methods, different soil geological conditions and different hole depths. Rotary drilling rig and submersible drilling rig have also compiled the quota of mud circulation system on board, so they should be selected according to the actual situation when compiling the budget estimate. This quota has been included in the number of labor, materials and machine shifts consumed by drilling rig production, assembly, replacement, dismantling and bit maintenance, and the bit cost has been included in the amortization expense of equipment, so it will not be calculated separately when preparing the budget estimate.
13. The concrete quota of cast-in-place pile is compiled according to mechanical mixing and underwater concrete pouring into the conduit on the working platform. The quota has included the amortized labor cost and material cost of equipment (such as conduit, etc.). ) and reaming to increase the amount of concrete. When preparing the budget estimate, it shall not be calculated separately. The quota also includes the quota of the concrete mixing station on board, which should be selected according to the actual situation when preparing the budget estimate.
14. The consumption of materials and equipment for burying the liners, such as the clay for burying the liners on land or the positioning guide frame for burying the liners in water, the iron parts and sulfur cement for the joint of steel or reinforced concrete liners, has been included in the quota, so it will not be calculated separately when preparing the budget estimate. The steel liners buried in water are included in the quota according to the total design weight of the liners, and the recovery amount can be calculated according to the design requirements.
15. In the quota of pontoon working platform, the working area of each pontoon is 3 * 6 = 18m2.
16. Classification of borehole soil:
(1) Sandy soil: sandy soil with a particle size of not more than 2mm, including silt and light loam.
(2) Clay: loam, clay and loess, including earthy weathering.
(3) Gravel: the content of breccia and round gravel (referring to the weight ratio, the same below) with a particle size of 2-20 mm is less than or equal to 50%, including flint clay and particle weathering.
(4) Gravel: the content of breccia and round gravel with a particle size of 2-20 mm is more than 50%, and sometimes it also contains gravel and pebbles with a particle size of 20-20~200mm, with a content of less than 10% and massive weathering.
(5) Pebble: gravel with a particle size of 20~200mm, with pebble content greater than 10%, sometimes containing boulder and boulder, with content less than 10% and massive weathering.
(6) Soft rock: all kinds of soft, multi-jointed, loosely cemented rocks, as well as hard block rock soil and boulder soil.
(7) Sub-hard rock: hard rock, including hard blocks and boulders with particle size greater than 500mm and content greater than 10%.
(8) Hard rock: all kinds of hard rocks, including lumps and boulders with particle size greater than 1000mm and content greater than 10%.
17. The cap quota is applicable to the pouring of bottom formwork and bottomless formwork cap for waterless or shallow water construction, and the bottom formwork and side formwork have been included in the quota. Box materials should be added to the deep-water pouring pile caps.
18. Rules for calculation of quantities:
(1) The height of cofferdam and island building is the average construction depth plus 50cm, and the length is calculated according to the center length of cofferdam. The engineering quantity of the suspended box cofferdam is the sum of the weight of the suspended box metal structure, the weight of the suspended platform when the suspended box sinks as a whole and the support weight in the suspended box cofferdam.
(2) The excavation amount of foundation pit shall be calculated after the slope is determined according to the design drawings, geological conditions and construction specifications. However, collecting wells, drainage ditches, foundation pits are backfilled and tamped. Are included in the quota, not included in the quantities.
(3) The quantity of foundation works on natural foundation shall be calculated according to the sum of the quantities of foundation, supporting beam, river bed paving and water-resisting wall.
(4) Engineering quantity of open caisson production: Gravity open caisson refers to the specific engineering quantity of shaft wall and partition wall in the design drawing; Steel wire mesh cement thin-walled open caisson is the weight of blade foot and skeleton steel, but it does not include the weight of barbed wire; The engineering quantity of steel shell open caisson is the total design weight of steel.
(5) The engineering quantity of open caisson floating positioning is the area surrounded by the outer edge of open caisson blade foot.
(6) The fixed quantity of anchorage system refers to the quantity of anchorage, which is calculated according to the requirements of construction organization design.
(7) The sinking quota of open caisson shall be calculated by multiplying the area surrounded by the outer edge of open caisson foot by the sinking depth of open caisson foot. Different sinking depth quotas are adopted for open caisson sinking according to the depth of soil and stone, and the sinking depth in the quota refers to the height from the top surface of open caisson to the working face. The comprehensive overflow (sediment turning) in the quota will not increase any more.
(8) Quantity of caisson filling: the entity is the sum of the quantities of back sealing, core filling and capping; Hollow is the sum of the number of back cover and top cover.
(9) The number of bored piles shall be calculated according to the buried depth of design drawings. Hole depth refers to the depth from the top of the pile casing to the bottom of the pile. In the hole-forming quota, the total hole depth quota should be applicable to different soils in the same hole, regardless of their depth.
(10) The concrete quantity of cast-in-place pile is the entity quantity of the designed pile diameter. As for the number of reaming and the number of pile heads to be chiseled, they have been put into the quota and are not included in the quantities.
(1 1) The number of working platforms for cast-in-place piles shall be calculated according to the area required by the construction organization design.