Water-stop type corner lug steel sheet pile and construction method

Abstract

The invention belongs to the field of underground engineering steel sheet pile supporting construction, and particularly relates to a water-stop type corner lug steel sheet pile and a construction method. The water-stop type corner lug steel sheet pile comprises a steel sheet pile body, wherein corner lugs are arranged on the two sides of the steel sheet pile body in the length direction, each corner lug comprises two tenons, and a wedge-shaped groove is defined between every two tenons; the width is gradually increased when the tenons extend outwards; the tenons are inserted into the grooves in a matched mode; and an oval hole is formed in the inner side of the steel sheet pile body in the length direction, a check ring is arranged in the oval hole, and an oval steel ball is placed in the check ring. The steel sheet pile can be used for different geological landforms, can be flexibly combined into various types of pile bodies, and has the remarkable advantages of being easy to construct, high in strength and stability, good in water-stop performance of a supporting structure, small in influence on the periphery and the like.

Description

technical field [0001] The invention belongs to the field of underground engineering steel sheet pile support construction, and in particular relates to a water-stop type corner ear steel sheet pile and a construction method. Background technique [0002] In recent years, with the rapid development of urban construction in my country, the demand for underground space development and construction in municipal infrastructure construction has also continued to increase, especially foundation pit construction, which presents the characteristics of complex construction environment, high standard requirements, and tight construction schedule. , the application of Larsen steel sheet pile support construction technology has attracted more and more attention. [0003] At present, the Larsen steel sheet piles formed by cold bending or hot rolling are mostly "Z" or "U" shaped in cross-section, and the edge of the steel sheet pile has an arc-shaped lock. However, for pile sinking on wat...

AI Technical Summary

Problems solved by technology

However, for pile sinking on water or when precipitation causes harm to surrounding buildings, underground pipelines, roads, etc. or causes long-term adverse effects on the environment, this kind of edge has a circular arc-shaped lock "Z" or "U" Larsen The steel sheet pile is restricted by many problems such as its own locking form or construction method. During the excavation of the foundation pit, water seepage and leakage often occur at the locking part of the steel sheet pile, which affects the normal implementation of various construction procedures in the foundation pit.

In order to solve this phenomenon, the current conventional methods are as follows: first, after the foundation pit is excavated, it is necessary to add locking water-stopping materials to the steel sheet piles or weld steel plates at the locking parts for water-stopping; the second is to use stirring piles on the outside of the steel sheet piles Or rotary grouting piles cooperate with steel sheet piles to form a water-stop curtain, which virtually affects the construction progress of the project and increases the construction cost of the project

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