20 12 in may, the provincial archaeological team plans to start archaeological excavation at Pingshan station of Fuzhou subway, and the construction enclosure is just in the core area of the "three mountains and two towers" site protected by Fuzhou ancient city. Before the subway construction excavation, the necessary archaeological excavation work must be carried out first.
On 20 12 12, the staff of Fuzhou Archaeological Team excavated a large number of ancient architectural relics at Pingshan Station of Metro 1 Line.
August 20 13, the archaeological site of the Han Dynasty in Pingshan subway station in Fuzhou was restarted, which is expected to last for three months. According to the arrangement of the subway company, archaeologists will enter the site for construction after the Spring Festival of 20 13. But in fact, due to the need for protective wall construction in the subway site to ensure the safety of underground archaeological excavation, archaeologists began to enter the site in early August of 20 13. According to the arrangement of the superior, the archaeology of Pingshan subway station will end on1October 30, 20 13 165438.
During the excavation of archaeological sites, whether the sites should make way for the subway has attracted the attention of netizens. On the one hand, the voice of rescuing the remains of the ancient city of Fujian and Vietnam is rising gradually. On the other hand, voices questioning the Fuzhou municipal government and the subway company are constantly appearing on the Internet.
In order to solve the contradiction between subway construction and cultural relics protection, Fuzhou Metro Company and the Municipal Cultural Relics and Archaeological Team have adopted the principle of "overall planning and cross-construction" in the process of subway construction with reference to other cities at home and abroad. After the demolition of the existing pavement and envelope was completed, the subway construction team immediately withdrew from the site and handed over the site to the archaeological team. They support each other and cooperate closely.
The situation encountered at Pingshan Station belongs to "archaeological excavation under the road". After in-depth study, relevant departments and experts in cultural relics protection found the Tongzhou city wall and Wengcheng site in the development of Tongzhou Canal core area and rail transit construction, and decided to learn from Beijing's practice, hollowing out all the areas involved in the excavation of Pingshan Station, cutting the site, scanning the site in three dimensions, recording dynamic and static images, etc. And consider protecting and displaying archaeological achievements in the future.
20 13 12 10, Fuzhou archaeological team said that the excavation work is progressing smoothly, and the archaeological team cooperates well with the subway construction party, striving to relocate the site before the end of this year. The 3500m2 construction site of Pingshan Station of Fuzhou Metro is divided into 28 exploration sites, of which 18 at both ends is continued by the subway constructor, and the rest 18 is used for archaeological excavation. According to the original plan, the site will be cut and moved out for preservation, and then moved back to the exhibition after the subway station is completed. Archaeological work ended on 2014,65438124 October. During the five-month archaeological work, * * * excavated more than 2,000 bags of cultural relics, found 24 pieces of cultural relics1piece, and cut 503 pieces of cultural relics for protection.
During the Spring Festival of 20 14, Fuzhou Museum launched the exhibition of archaeological achievements of Pingshan subway station, showing the archaeological achievements of Pingshan subway station since August 20 13. Subsequently, Pingshan subway station entered the main building construction.
2065438+In March 2005, archaeological excavation began at the east entrance of Pingshan subway station. The archaeological site this time is in the open space on the south side of Yeshan intersection, with an area of 1.500 square meters. The first phase starts in mid-March and ends in early May, and the venue is in the open space at Yeshan intersection. The second phase is planned to start in August, on the sidewalk around the intersection of Yeshan Road and Gu Ping Road. Although this archaeological excavation will not affect the construction of the subway trunk line, the construction of the east entrance of Pingshan subway station can only be carried out after the archaeological excavation. The citizens hope that the archaeological excavations will be accelerated appropriately, so as not to delay the opening of the subway 1 line.
After the first phase of archaeology at the east entrance of Pingshan Station, the archaeological site will be handed over to the subway company. The second phase of the project will strive to start in August, and archaeological excavation will be carried out on the sidewalk at Yeshan intersection of Gu Ping Road outside the enclosure and the pedestrian passage area of ***800 square meters inside the enclosure, with a construction period of about 2 months. After the end of the archaeology of the east entrance of Pingshan subway station, the archaeology of Pingshan subway station was all over. The footbridge in Dongjiekou Scenic Resort Scenic Area is not only the first footbridge in Fuzhou, but also the first urban footbridge in Fujian. For people who have lived in Fuzhou for a long time, the overpass in Dongjiekou Scenic Resort Scenic Area bears many memories and stories of Fuzhou people.
2011/dongjiekou subway station plans to start surveying and delimit the construction area, and then carry out greening transplantation and pipeline relocation. The two sidewalks strive to be completed before the Spring Festival, and the overpass in Dongjiekou Scenic Resort Scenic Area is planned to be demolished after the Spring Festival. Many shops along the street, such as the old department store and Glory Theater in Dongjiekou Scenic Resort Scenic Area 10, will be demolished simultaneously. It is estimated that the subway station in Dongjiekou Scenic Resort Scenic Area will formally enter the main structure construction in March of 20 1 1.
On 2011February 17, the workers' overpass cut and removed eight street lamps beside eight stairs. In the next three days, the workers will dismantle the drainage pipes, signs, signal lights on the overpass and a public security booth under the bridge one by one, and at the same time dismantle the pipes.
To commemorate the "retirement" of Tianqiao in Dongjiekou Scenic Resort Scenic Area after 25 years of service, Fuzhou Postal Department issued a souvenir cover on the 20th, and held a free commemorative postmark activity in Dongjiekou Scenic Resort Scenic Area Postal Building.
2011the evening of February 20th, 10: 45, is a very ordinary moment, but it is a special moment for the overpass in Dongjiekou Scenic Resort Scenic Area ... With the roar of a machine, the overpass that has been in service for 25 years has completed its mission and officially started to be demolished. Starting from that night, the construction unit will start to dismantle the four approach bridges of the overpass, and initially plan to dismantle the approach bridge on the side of Juchunyuan Hotel. After the approach bridge is demolished, the main bridge will be demolished in four nights in the order of east, west, north and south.
On the evening of the 20th, the construction unit first demolished the overpass and two suspension bridges connected to the two exits on the second floor of Dongbai C Building. During the construction period, the southwest passage of the overpass is temporarily closed, and the other three directions pass as usual. After the two suspension bridges are cut separately, they are removed by crane.
At 22:02, the fence closed the north entrance of Dongbai Building on the overpass.
At 22:05, close the entrance of the overpass on the second floor of Dongbai.
22: 10, clean up the construction site and persuade the citizens on the overpass to leave.
22: 12, blocking the entrance of the overpass on the first floor of Dongbai Building.
At 22: 36, the main bridge between Dongbai Building and Postal Building was blocked by a fence and the crane drove under the bridge. The guardrail around the sidewalk on the first floor of Dongbai Building was removed and a construction fence was placed.
At 22: 45, the construction workers began to pry up the floor tiles of the suspension bridge on the second floor of Dongbai, and then cut them. Demolition of overpass in Dongjiekou Scenic Resort Scenic Area officially started.
For the convenience of citizens, pedestrian footbridges with steel frame structure are planned to be built in Dongjiekou Scenic Resort Scenic Area, 70-80m west of overpass, near Chang 'an Building, and 70-80m east of overpass, near Xinhuadu Shopping Mall.
In addition, Pingshan Station of Metro 1 Line and Qiantang Pedestrian Bridge at the junction of Gu Ping Road and Yeshan Road are also planned to be demolished. In August, 2009, Fuzhou Metro Office reported the situation of Fuzhou Metro Project to the 22nd meeting of the 13th Standing Committee of Fuzhou Municipal People's Congress. The subway 1 line will strive to start construction at some nodes before the end of 2009, and the whole line will start construction in July 20 10, and the whole line structure will basically run through in February 20 12. On June 20 13, the whole line of power supply was opened, and on July 20 13, the whole line of tracks was basically connected. System debugging started in June of 20 14, and put into trial operation in February of 20 14.
In July of 20 10, due to various reasons, the progress of Fuzhou Metro 1 line was obviously lagging behind, and the relevant units planned to extend the trial operation date to the end of June of 20 15.
20 12 March, the first phase of Fuzhou Metro 1 Line is scheduled to complete the civil construction at the end of 20 13, and it is planned to put into operation the first phase of Fuzhou Metro 1 Line before the 8th National City Games (later changed to the 1st National Youth Games) on 20 15.
In June, 20 12, 10 was postponed due to land acquisition and house expropriation. In order to ensure that the subway 1 line was opened to traffic before the 20 15 National Games, Fuzhou Metro proposed to complete the whole tunnel at the latest in the first half of 20 14.
September 20 13, the railway station, Pingshan station, Qingliangshan station and other stations were delayed due to archaeological demolition. The tunnel is expected to open on September 30th, 20 14, and the first bus will arrive on February 3rd1May.
On April 20 14, Fuzhou Metro Company reported the progress of subway construction. By the end of 20 14, the underground tunnels of Fuzhou metro 1 line will basically run through except for a few places.
July 20 14, influenced by the construction progress, Fuzhou Metro Company initially worked out the trial operation scheme of the north-south section of 1 line. The south section (Sanchajie Station to South Railway Station) is scheduled to be put into trial operation at the end of 20 15, and the north section (Sanchajie Station to Xiangfeng Station) is scheduled to be put into trial operation in June 20 16.
February 15, 10, the first press conference of Fuzhou Metro this year put forward that the construction plan for 1 Line 20 15 is as follows: the main structure of all stations in the whole line is capped, all the tunnel sections are connected, and the ancillary structures (except a few stations) are basically completed; The southern section (Sanchajie Station to Fuzhou South Station) has reached the opening conditions; North station (except some stations) completes the main structure, subsidiary structure and interval tunnel.
Track-laying in the northern section began in May 20 15. According to the plan, the northern section of 1 line was put into trial operation at the end of 20 16.
The city subway company concluded that there are "four difficulties" in the construction of subway 1 line: first, it is difficult to obtain land and houses; Second, the enclosure construction is difficult to divert traffic; Third, it is difficult to relocate pipelines; Fourth, Fuzhou has poor geological conditions and difficult construction.
Expropriation and relocation issues
The first phase of Metro 1 Line is * * * 2 1 station. Except for the civil engineering of Chating Station, which was completed ahead of schedule, the other 20 stations all need land acquisition and demolition. The total land acquisition area of subway 1 line is 787.94 mu. Metro 1 Line involves a total demolition area of about 440,000 square meters, and the demolition area of the four urban areas entrusted by the Municipal Metro Company is about 373,000 square meters. As of June 20 12, except for the demolition of Torre station, 24 other stations (including Nanmen main substation, Huangshan main substation and Qingliangshan parking lot) have been relocated. The total number of households involved in relocation is 197 1, 16 12 households have been moved and sealed, and 1528 households have signed compensation agreements, accounting for about 80% of the total number of households involved in relocation; Among them, 14 station has been demolished and handed over, and the completion of 10 station ranges from 65% to 95%.
On May 20 1 1, Xindian Metro Vehicle Base obtained the demolition notice and released it. In less than a year, 36 households have not moved, with a construction area of about/kloc-0.9 million square meters, of which 29 households were illegal houses without property rights built after 2004 or even after 2006. The relocated households put forward excessive requirements such as demolition, compensation and resettlement for illegal construction, etc., which exceeded the compensation and resettlement plan, and no agreement could be reached after many consultations. Metro Avenue Station and Rail Transit Command Center Project 2011017 obtained the demolition notice and issued it. As of May 3 12, 27 households who have not moved have been submitted to the Municipal Housing Authority for administrative adjudication. There are still 10 households in the dormitory of a unit involved in the relocation of Pingshan station of the subway, which has seriously affected the progress of the project. Among them, 3 households have completed the adjudication procedure, and the remaining 7 households are continuing the adjudication procedure, waiting for the collection office of Fuzhou Housing Management Bureau to make a compensation decision as soon as possible and start the filing and follow-up procedures. Due to the problems left over from the demolition and handover of the South Station and its surrounding projects, as well as the changes and adjustments in the planning of the new town where the subway station is located, the demolition and handover work has progressed slowly, even at a standstill.
20 12, 1 1 In June, 2006, the Taijiang District Government organized a protective demolition operation, and forced the demolition of four relocated households who had signed a demolition agreement but had not moved out and their adjacent houses, with an area of about 300 square meters. Jin 'an District Government organized personnel to demolish 6 illegally built houses and 4 relocated houses in Xindian Vehicle Base after 2004, and demolished houses 10, covering an area of about 6,000 square meters. Cangshan District Government organized protective demolition, and forced demolition of two relocated households and their adjacent houses that had signed the demolition agreement at Sanchajie Station, covering an area of about 2,000 square meters. 65438+February, Cangshan District Government carried out protective demolition of Qingliangshan parking lot, covering an area of about 4,000 square meters.
It is understood that the problem of expropriation of land-expropriated houses can be roughly divided into three categories: first, the relocated households were illegally built from 2004 to 2006 but demanded compensation according to normal houses, such as Xindian vehicle base; Second, the relocated households put forward excessive compensation requirements, which greatly exceeded the provisions of laws, regulations and policies; Third, the relocated households do have difficulties such as the elderly at home being old. The subway company and the Gulou District Government are looking for transitional houses around for the elderly to settle down.
geological conditions
The topography of Fuzhou subway planning site changes greatly and the geological environment conditions are complex. The main geological and environmental problems encountered in the planning and construction of the subway are: (1) The aquifer along the river and in the coastal areas in the area is rich in water, strong in water permeability and high in head pressure, and it is prone to sudden surge during tunnel excavation and foundation pit excavation. (2) Some sections of individual lines of Fuzhou Metro need to pass through the Quaternary pore thermal storage aquifer of Fuzhou geothermal field, and the underground hot water in this layer may have a certain impact on the subway construction. (3) Deep soft soil in the area is prone to large differential settlement, which leads to foundation instability, soil structure destruction and strength reduction, thus causing water leakage and seepage accidents. (4) Granite residual soil is widely distributed in the area, which is easy to cause soil gushing and water gushing; There are often spherical weathering residual cores such as boulder, and the larger boulder is easy to cause great difficulties in subway construction. (5) The stratum in this area is changeable, and the problems of stratum soft and hard mutation are frequent.
There are many kinds of strata along the subway 1 line, with extremely uneven distribution and large interface fluctuation, which is rare in other cities in China. 20 10 in September, the provincial development and reform commission organized a review meeting on the preliminary design of Fuzhou Metro 1 line. At that time, more than 50 experts from all over the country participated in the review, including academicians of the two academies. After consulting the geological survey report of 1 line, many experts pointed out that Fuzhou subway 1 line is one of the most complicated urban subway lines in China.
According to the survey, there are boulders in Xiangfeng Station-Xiushan Station-Luohanshan Station, Shudou Station-Pingshan Station, Avenue Station-Shangteng Road Station-Sanchajie Station, Triangle City Station-South Railway Station and other sections. The size of the boulder is uneven, and a little carelessness will lead to the damage of the cutter head of the shield machine, deviation from the axis and even a long-term shutdown accident. However, the spherical weathering of granite is difficult to be broken and easy to roll, which will lead to the damage of cutter head, the difficulty in controlling the posture of shield machine, the slow driving speed, the increase of residual disturbance and settlement, and may also lead to landslides. Granite residual soil and fully weathered rock are easy to disintegrate and muddy when exposed to water, which brings the risk of tool change.
2065438+July 2004, when the subway tunnel under Gu Ping Road was excavated, two large and hard boulders were encountered, which made the shield machine helpless. After "discussion", the construction personnel decided to carry out blasting. Finally, the blasting was successfully completed, which cleared the obstacles for shield tunneling. The tunnel between Shudou Station and Pingshan Station of Fuzhou Metro 1 Line has both hard rock and boulder. Shuping section has a single line 1 100 meters, and the hard rock area is nearly 400 meters. Especially when entering or leaving the hard rock, the posture of the shield machine is difficult to control, and the hob will get stuck or the direction of the cutter head deviates, resulting in snake-like propulsion, so it is necessary to stop and check the cutter and adjust the parameters. To this end, the construction unit will directly invite the maintenance factory in Guangzhou to the construction site to ensure that the replaced hob will be repaired and recycled immediately. This is unique in the national subway construction.
In the Minjiang section of the line 1, construction problems caused by complicated geology are also encountered. The 1 line needs to cross three kinds of soil layers, namely, full-face hard rock with a length of about 30 meters, soft-hard interface (upper soft and lower hard) and river bottom sand layer with a length of about 370 meters. The types of soil layers are complex and varied, and change suddenly, which is extremely unfavorable to construction. The river-crossing section was originally expected to run through in both directions by the end of 20 15. At present, according to the actual situation, the downstream shield of the river-crossing section was reinforced at the end of July, 20 15, and then the shield was officially pushed across the river, then it was driven to the reinforcement area of Zhongzhou Island, then the tool was changed, and then it was pushed to the north bank of the river, and it was planned to arrive at Dadao Station in May, 20 16. At the end of September, 2065438+2005, after the reinforcement of the upstream line on Zhongzhou Island, the shield of the upstream line was officially pushed across the river, and it was also pushed after changing the knife on Zhongzhou Island. It is planned to arrive at Avenue Station in July 2065438+2006.
Pipeline relocation and reconstruction
The relocation and reconstruction of 1 line involves more than 20 units, and there are too many approval links. Many units have to go through relevant procedures such as project establishment, design, construction team and bidding for main materials, and each link needs time to enter the site for construction. The required time is accumulated together, which leads to the slow improvement of pipeline relocation. For example, 6 1 10000 V high-voltage lines in the second loop of Shudou Station need to be relocated. If we move at the same time, there will be a large-scale power outage around Hualin Road and Wu Si North Road, so the power sector can only steadily push forward the relocation of power lines. In Shuping and Pingtung areas, it is difficult to relocate and transform many "1 10000 volts" power supplies at Shudou Station in the early stage.
In addition, during the main construction of Pingshan Station, the site of Yecheng, the capital of Fujian and Vietnam in the Western Han Dynasty, was discovered, and two periods of archaeology were carried out. The construction period of the station has been delayed again and again, and the total construction period has been extended by more than one year. There are several reasons and considerations for planning the same train operation in the north-south section of the first phase of subway 1 Line. First, many cities in China have similar practices. For example, Qingdao Metro Line 3, which started in 2009, is currently planned to open the northern section first due to the difficulty in demolition of the old city. Tianjin Metro Line 2 was put into trial operation in east and west sections due to line interruption. Shanghai Metro 12 Line and Beijing Metro 16 Line are also opened in sections. Second, give play to the investment benefit of 1 line as soon as possible; The third is to cultivate and train new operation teams; Fourth, set aside time for equipment debugging and running-in to ensure the safety of trial operation.
The northern section (Sanchajie Station-Xiangfeng Station) entered the site late in the early stage due to demolition, and was greatly affected by the second phase archaeology of Pingshan Station, the relocation of six 1 10000 kV high-voltage lines in the second loop of Shudou Station, six traffic diversion reforms, and difficulties in negotiations on the construction of underground shops in railway stations, which led to serious delays in the construction period of these three stations for more than one year. The main reasons affecting the opening of the northern section are comprehensive factors such as traffic diversion, pipeline relocation, muck transportation, complex engineering geology and lack of management experience.