Pile foundation bearing platform river-near deep foundation pit supporting system and construction method

Abstract

The invention provides a pile foundation bearing platform river-near deep foundation pit supporting system and a construction method. The transverse moving direction of a sliding connecting frame is limited through a suspension cross beam, and a vertical rolling and pulling machine and a transverse rolling and pulling machine are combined to control the rolling and laying direction of a blanket rolling shaft and an anti-seepage blanket; the stability and the water level of soil outside the pit are monitored by adopting a combined monitoring pipe; a recycling mud jacking pipe and an indwellingmud jacking pipe are arranged in the soil body outside the pit, and mud jacking can be conducted to form a mud jacking solidified body; the driving direction of a steel sheet pile is limited through an outer side guide plate; in the inserting process of the steel sheet pile, pile side mud jacking body construction is conducted synchronously through the built-in mud jacking pipe; and a position adjusting jacking body can move up and down along a reinforcing supporting column, and transverse jacking force can be applied to the steel sheet pile through the position adjusting jacking body. The positions of back pressure bags are limited through bag bottom supporting plates and bag side supporting plates, extrusion force can be applied to the back pressure bags through the bag filling liquid, the stability of the foundation pit supporting structure can be improved, the anti-permeability performance of the steel sheet piles is improved, and the permeation disease treatment difficulty is reduced.

Description

technical field [0001] The invention relates to the field of foundation pit engineering near water, in particular to a support system for pile foundation caps facing river deep foundation pits that can improve the stability of foundation pit support structures, improve the anti-seepage performance of steel sheet piles, and reduce the difficulty of treatment of seepage diseases and construction methods. Background technique [0002] In the construction of riverside projects, affected by the external water level, the stability of water-retaining structures on the waterfront side is often the focus and difficulty of engineering control. Engineering diseases such as unstable landslides and seepage damage often occur during the excavation of foundation pits near waterfronts. [0003] In the prior art, there is a foundation pit support system and its construction method. The support system includes a top frame, which is connected with a telescopic element. The telescopic element i...

AI Technical Summary

Problems solved by technology

Although this technology does not require the construction of temporary structures such as retaining piles and anchor cables, the expansion parts involved in it occupy a large space, and it is difficult to simultaneously solve the seepage problem of the foundation pit

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