Recently, the construction of guangzhou subway line 10 has made new progress. After careful research and demonstration, and with the consent of guangzhou municipal government, municipal housing and construction department, municipal garden department and yuexiu district government, donghu station is about to enter the construction stage.

Guangzhou metro said that donghu station, which is the same construction station for line 10 and line 12, will be built in two phases to enclose the lake. During the construction process, a number of measures will be taken to strictly control the enclosed area and time to minimize the impact on the surrounding residents. After completion, donghu station will realize “three-line transfer” with the existing line 6. guangzhou massage

The ” three lines transfer” station is large

It is known that the subway line 10 runs from northeast to southwest, slanting through the central district of guangzhou and connecting the four administrative regions of tianhe, yuexiu, haizhu and liwan. The routes include the existing tianhe passenger station of line 3 and shipai bridge, and the newly-built shipai bridge and xilong long, which are about 25.2 km in length. They are all laid underground, with a total of 19 stations, including 11 transfer stations. As of April 2019, siyou xinma station and dongsha station (both temporary names of the project) have entered the site for construction.

According to the design plan, the newly built east lake station is 257.8 meters long and 54.2 meters wide. The station is an open-cut island type station with five floors underground. The first floor is the hall floor of line 12, which is connected to the public area of line 6. The second floor is the platform floor of line 12, the third floor is the hall floor of line 10, the fourth floor is the equipment floor, and the fifth floor is the platform floor of line 10.

The construction plan has gone through multiple rounds of demonstration

The reporter understands, the dongshan lake park, east lake stand enclosed will have to take up part of the land, as the most important site visit nearby residents have a rest, line 10 east lake station construction how to maximize the effect of reducing the number of parks and citizens, and to ensure future passengers convenient travel, the problem is the enclosed in guangzhou metro and the contractors consider most of the factors.

From the surrounding environment, dongshan lake park has donghu road, haiyin bridge, inner ring road viaduct and pearl river scenery belt, dongshan stadium, east lake square, haiyin commercial building, dashatou community and other densely populated buildings, the choice of construction site encountered many constraints. According to the introduction, in fact, in the early demonstration of the site selection of donghu station, a number of schemes were abandoned due to greater impact on traffic and citizens. Therefore, in order to minimize the impact on the surrounding area, after several rounds of argumentation by industry experts, it was decided to set the newly built east lake station in dongshan lake park.

Why can’t stations be set up to avoid the lake district? According to the introduction, the east lake station west side 6 meters for the donghu road main road, the south side 8 meters for rongbaozhai and the existing line 6 station, the north side 6 meters for huayi gallery, the east lake station only occupies part of the lake area to meet the use of function, is also the current best one program. Can the station be built with less dust? “If the excavation method is adopted, it will not only be extremely difficult and risky, but also take up more time in the park.” Construction unit relevant person in charge explained. Compared with open cut, in the process of underground strata deformation of donghu lu, donghu lu road under the main line, the west side of donghu lu residential building, both the line 6 station at east lake, north and south on both sides of the building (structure) affect the safety of, the station local in the lake district, its own construction risk is extremely high, prone to pour water, underground construction land slide, roof safety wind, etc. However, the open-cut construction is relatively less difficult, and the construction safety, project quality and construction speed are more stable and controllable. During the construction, it will not occupy the municipal road by staging, and will have less impact on the surrounding traffic. The restoration of the lake area after the completion of the construction can also minimize the impact on the public.

Enclosure construction will be carried out in two phases

In order to minimize the occupation of green space and reduce the inconvenience to the public, guangzhou metro and the participating units overcame many difficulties and constantly optimized the construction plan. After several expert argumentation and program adjustment, the enclosed area was finally determined to be 26,170 square meters, and the enclosed area was planned to be divided into two phases.

The first phase of construction is scheduled to start in late April, covering an area of 23,657 square meters, of which 5,857 square meters are on the lake. At that time, haiyin gate (namely the front gate of dongshan lake park) will be the center of the park, which will be enclosed in the north and south of the park. In the enclosed area, tree relocation, pipeline relocation, lake filling cofferdam and evacuation passage in the park on the east side of the cofferdam will be carried out, and hardening and plane layout of the construction site will also be carried out.

The second phase of the fenced area will start in August this year and is expected to end in December 2023. At that time, haiyin gate will need to be closed. The public can enter the park through a new pedestrian crossing 100 meters to the north, and follow the enclosed pedestrian passage to the bauhinia willows causeway and the island in the middle of the lake. Within the enclosed area, the construction of the station enclosure structure, foundation pit excavation, main structure, subsidiary structure, shield shaft and transfer hall will be carried out.

In order to strengthen the overall coordination with the park environment, three-dimensional green plants were used as far as possible during the enclosure, and daily maintenance was strengthened to achieve an organic integration with the park landscape. In addition, during the implementation of the second phase of the enclosure, the surface layer of the new pedestrian passage was laid with floor tiles, and protective railings were installed on the side of the lake. The material was consistent with the style of the park, and a solar street lamp was installed at an interval of 30 meters for the convenience of visitors.

It is understood that donghu station is scheduled to be completed by the end of 2023, and will carry out landscape restoration in accordance with the park requirements, a one-time overall return.

A number of measures to reduce the impact of construction

As far as lake filling is concerned, will it affect the water quality of east lake? The reporter understands, construction unit will do flake-stone cofferdam first when filling lake job, fill in cofferdam earthwork land. In order to prevent the pollution of lake water outside the site in the process of lake filling, a green PVC anti-pollution barrier is set up within the 4-6 meters of the lake area outside the enclosure before the construction of the lake filling cofferdam, to effectively isolate the turbid lake water generated by riparian and squeeze silting from the lake water of dongshan lake. After the cofferdam is backfilled to the design elevation, the upper floor is hardened with concrete. During construction, the geomemask of PVC antifouling barrier filters the turbid water that may appear to prevent the lake water outside the construction area from being polluted. In addition, guangzhou metro will commission a third party professional body to conduct regular water monitoring of the lake, and take timely measures to ensure water quality, so as to minimize the impact of lake filling construction on the lake.

Before the construction of the enclosure is carried out, the construction unit will work with the park owner to put up a guide at an important place in the park and make a guide board for the convenience of the public. During the construction process, guangzhou metro asked for a ban on high-noise construction work at night. At the same time, the construction units strict according to “guangzhou dust prevention and” six 100% “construction project management standard refine measures” of the specific requirements, the scene around the closed walls (WeiDang), set up the spray system, fog gun equipment such as dust, the use of advanced construction equipment to reduce noise pollution, and installation of air quality and noise monitoring equipment for real-time monitoring of the environment. During the construction period, mud, vehicle washing water, sewage of construction personnel, surface runoff in rainy season and other waste water treatment equipment will be recycled or discharged into the municipal pipe network after reaching the standard through precipitation treatment and wastewater treatment, and monitoring equipment will be installed at the sewage discharge port for real-time monitoring.