An assembled pipe jacking pit support structure and its construction technology

Abstract

The invention relates to an assembled pipe jacking working pit support structure, comprising a pit wall support structure and a support reinforcement structure; the pit wall support structure includes a plurality of support frames arranged along the inner wall of the work pit and a The connecting frame on the top of the support frame, the lower end of the support frame is buried in the bottom of the work pit, the upper end is connected with the connecting frame, and the adjacent connecting frames are connected together; the support and strengthening structure includes a lower support frame and an upper part The support frame, the lower support frame has the same structure as the support frame, and is connected between the support frame and the bottom of the working pit, and the upper support frame has the same structure as the support frame and is connected between the two opposite support frames. between. The invention adopts a prefabricated support structure, which can quickly support in the working pit, has fast installation speed and high support strength.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to an assembled pipe jacking pit support structure and a construction process thereof. Background technique [0002] Pipe jacking construction, as the earliest trenchless construction technology, has been widely used in the construction of municipal drainage pipes due to its advantages of short construction period, high precision, high degree of construction civilization, and little interference to traffic. With the popularization of this technology, there are more and more application occasions, especially in the surrounding buildings, not only the walls of the working pit are required to be stable, but also the safety of buildings, roads, pipelines, etc. around the foundation pit must be ensured. , thus putting forward higher requirements for the support of the pipe jacking pit. [0003] At present, the commonly used support methods for working pits include the f...

AI Technical Summary

Problems solved by technology

However, this construction method has high construction cost and complicated process, and due to the influence of concrete curing period, the construction period is long. The caisson method is more commonly used when the geological conditions are poor, there is surface water or the groundwater level is high.

3) Cast-in-situ piles; cast-in-place piles have the advantages of high rigidity and flexible layout, but they need to be used as horizontal cover beams and waist beams and do not have the function of retaining water. In addition, auxiliary anti-seepage measures are required, and drilling equipment and mud retaining walls are required , high economic cost, not suitable for small-scale construction

[0004] When the pipe jacking construction is carried out in the rainy season, the construction is difficult, and it is necessary to quickly complete the support of the working pit to ensure the normal and rapid progress of the pipe jacking. The above four supporting methods of the working pit not only have a long construction period, but also support The construction cost of protection is also high, it is difficult to meet the requirements

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