Construction joint structure of deep foundation pit inverted construction

Abstract

The invention relates to a construction joint structure of deep foundation pit inverted construction. The construction joint structure comprises an upper wall segment, a lower wall segment, a connecting assembly and an impermeable assembly. The bottom surface of the upper wall segment is tightly attached to the top surface of the lower wall segment. The bottom of the upper wall segment and the upper portion of the lower wall segment have the same gradient. The connecting assembly comprises vertical joint bars. The impermeable assembly comprises a waterproof steel plate, water-expandable rubberstrips and an air exhaust pipe. The water-expandable rubber strips are arranged at the bottom of the upper wall segment. Parts of the vertical joint bars, the waterproof steel plate and the air exhaust pipe are buried in the upper wall segment, and the other parts are buried in the lower wall segment. The underground structure adopts multiple impermeable anti-cracking structure measures, the construction joint waterproof effect and construction quality of layer-by-layer inverted construction of the underground structure are effectively guaranteed, the construction joint structure has the advantages of high adaptability, simple technology, high mechanical degree, short construction period, safety and reliability, and a good waterproof anti-cracking effect is particularly achieved on inverted construction of complex underground deep foundation pit structures similar to large swirl pools.

Description

technical field [0001] The invention belongs to a technical measure for reverse construction of an exterior wall of an underground structure in a large deep foundation pit, belongs to the construction field of an underground deep foundation pit wall reverse construction method, and in particular relates to a construction joint structure for reverse construction of a deep foundation pit. Background technique [0002] The reverse construction method is a method of constructing underground engineering structures layer by layer from top to bottom. In recent years, there have been more and more cases of using this method in large-scale deep foundation pit underground engineering. In order to ensure that the waterproof level of the entire project meets the corresponding specification requirements, the anti-seepage and anti-crack measures at the construction joints of the underground wall layer by layer (segment) must be properly handled, which is also the key to the success of the ...

AI Technical Summary

Problems solved by technology

[0009] The invention provides a construction joint structure for reverse construction of deep foundation pits, which aims to improve the anti-seepage effect of the construction joints of the reverse construction method and the problem that the quality of the construction joints is not easy to control

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