Changzhou City, Riverside sewage treatment plant pipe network expansion project bid of a Hui Jia Tang sewage pump station project is located in the Yangtze River Road, No. 100, bid contract price 2180 million yuan, after the completion of the scale of 40 million tons / day. The project of the main building has a sewage pumping station, sewage pumping station substation
The. The construction content includes earthwork, foundation pit, at the lower part of the pumping station, a water inlet and outlet pipe enclosure, roads and pipelines, process piping, pumping stations at upper part, the distribution and management of the space, water and electricity installation.
This project is the most important node is the most difficult excavation and retaining foundation pit pumping station. Pumping station excavation depth of 13.51 metres, foundation pit circumference of about 150 meters, area of about 1245 square meters, mainly by SMW + three steel braced retaining system.
Although the process has been widely used in large cities such as Shanghai, it is not common in our city. We have passed the expert authentication scheme, choose the strength and experience of the construction team construction. The foundation pit retaining wall with the diameter of 3 850@1200 diameter shaft three
Mixing pile, 20% of the amount of cement stirring pile length 23.2m; interpolation H700 x 300 x 13 x 24 type steel and separated in a, spacing of 1.2 meters, steel length of 24 meters, high a purlin 0.5 meters.
According to the design requirements, the pump foundation set up a total of 135 steel and 336 root root three axis mixing pile. The three axis cement soil mixing pile adopts JN-250 type rotary drilling, and the high pressure mud pump is used to transport the cement slurry to the drill through the high pressure pipe.
, continuous spray, combined with air compressor and thoroughly mix the cement slurry and the surrounding soil; according to the design of the H type steel insert has been the formation of cement soil mixing pile in, so as to form a sealing earth retaining wall, to achieve the function of foundation pit.
After the completion of pouring pile, namely the first crown beam purlin. The phi 800 bored as a force structure, in accordance with the design requirements designed 12 root, the diameter of the pile 800 pile length, 8m. Then the steel purlin second, three purlin construction, each completed purlin
After the corresponding support construction, to ensure that the first support after excavation.
After the completion of the construction of the foundation pit, the current floor concrete, foundation pit force with the construction is completed, has begun to remove the third support, ready to start next month S8 C30 anti seepage foundation wall construction.
(Zhao Binbin correspondent Jiang Minhua)