Compensation type construction structure for underground engineering construction and construction method thereof

Abstract

The invention relates to the technical field of foundation pit engineering, in particular to a compensation type construction structure for underground engineering construction and a construction method thereof.The construction structure comprises a steel jacket box, the steel jacket box covers the construction range of a to-be-built structure, a central reinforcing area is arranged at the bottom of the steel jacket box, anchor piles are arranged in the central reinforcing area, and the steel jacket box covers the construction range of the to-be-built structure. The anchor piles are arranged on the two sides of the existing underground structure, the anchor piles are connected through anchor plate beams arranged at the tops to form a door type frame structure, proper slurry is injected into the steel jacket box according to the soil taking amount, and equivalent pressure compensation is generated for an unexcavated area. The method has the advantages that the impervious layer is formed by combining the foundation stratum reinforcing area with the jet grouting pile seam sealing, the generated load pressure is controlled by combining the height of the slurry liquid level in the steel jacket box, and the stratum stress at the position of the existing underground structure is kept unchanged.

Description

technical field [0001] The invention relates to the technical field of foundation pit engineering, in particular to a compensating construction structure for underground engineering construction and a construction method thereof. Background technique [0002] At present, with the process of urbanization in China, underground projects are developing vigorously. Due to the different planning and construction timing of each project, the resources of underground space are becoming more and more tense; The anti-floating, stratum rebound and floating of the existing underground structures have caused a series of problems, which bring hidden safety hazards to the existing underground structures in operation and use; the current mainstream construction technology is: first, the stratum is strengthened, and then the foundation pit is divided into small pieces. In this way, the excavation can reduce the impact of construction on the existing underground structures, but the process sti...

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Problems solved by technology

[0002] At present, with the process of urbanization in China, underground engineering is developing vigorously. Due to the different planning and construction sequences of various projects, underground space resources are becoming more and more tense; when excavating foundation pits above existing underground structures, it will inevitably lead to The anti-floating of the existing underground structures and the rebound and rising of the strata caused a series of problems, which brought safety hazards to the operation and use of the existing underground structures; the current mainstream construction technology is: first strengthen the ground, and then divide the foundation pit into small pieces Excavation is used to reduce the impact of construction on existing underground structures, but this process still has the problem of anti-floating and rebound floating due to stratum exposure for a certain period of time during the excavation process; secondly, due to the existence of existing underground structures, the The insertion depth of the location enclosure structure is limited, and it is generally not easy to meet the stability calculation. Moreover, the excavation in blocks leads to many joints, difficult construction and poor force bearing

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