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A platform for research: civil engineering, architecture and urbanism
Construction method of underground diaphragm wall fore shaft pipe joint water stop structure
The invention relates to a construction method of an underground diaphragm wall fore shaft pipe joint water stop structure, which comprises the following steps: in a ground wall construction stage, after a groove section is excavated, a fore shaft pipe with the same width as a groove is inserted into the end part, and concrete pouring is carried out, one side of the fore shaft pipe is provided with a small-diameter semi-arc groove structure, and the other side of the fore shaft pipe is provided with a small-diameter semi-arc groove; after the concrete is initially set, the locking opening pipe is pulled out to form a concave-in-concave structure; after excavation of the lower ground wall is completed, a steel pipe is inserted into the small concave position, then concrete is poured, the steel pipe is pulled out after initial setting of the concrete, a circular hole is formed between every two adjacent ground walls, secondary grouting treatment is conducted or water stopping materials are filled, and leakage at the joint of the wall connecting groove sections is effectively controlled. Compared with an existing water stopping scheme that a delta-shaped high-pressure jet grouting pile is constructed on the outer side of the fore shaft pipe joint, the function of secondary grouting at the fore shaft pipe joint can be achieved through the arc grooves, the leakage problem is reduced, the construction cost is reduced, the construction period is shortened, and effective water stopping at the fore shaft pipe joint of the underground diaphragm wall is achieved.
本发明涉及一种地下连续墙锁口管接头止水结构的施工方法，其步骤为：在地墙施工阶段，待槽段开挖完成后，在端部插入一根与槽宽相等的锁口管，并进行混凝土浇筑，该锁口管的一侧具有小直径半圆弧槽结构，待混凝土初凝后将锁口管拔出形成一个凹中凹结构；在下幅地墙开挖完成后，先在小凹位置插入钢管后再浇筑混凝土，待混凝土初凝后将钢管拔出，在相邻两幅地墙之间形成圆形孔洞，并做二次注浆处理或填充止水材料，使连墙槽段接头处渗漏得到有效控制。与以往在锁口管接头外侧施工品字形高压旋喷桩的止水方案相比，通过圆弧槽可实现在锁口管接头二次注浆的功能，减少渗漏问题，降低了施工成本、缩短了工期，实现了地下连续墙锁口管接头处有效止水。
Construction method of underground diaphragm wall fore shaft pipe joint water stop structure
The invention relates to a construction method of an underground diaphragm wall fore shaft pipe joint water stop structure, which comprises the following steps: in a ground wall construction stage, after a groove section is excavated, a fore shaft pipe with the same width as a groove is inserted into the end part, and concrete pouring is carried out, one side of the fore shaft pipe is provided with a small-diameter semi-arc groove structure, and the other side of the fore shaft pipe is provided with a small-diameter semi-arc groove; after the concrete is initially set, the locking opening pipe is pulled out to form a concave-in-concave structure; after excavation of the lower ground wall is completed, a steel pipe is inserted into the small concave position, then concrete is poured, the steel pipe is pulled out after initial setting of the concrete, a circular hole is formed between every two adjacent ground walls, secondary grouting treatment is conducted or water stopping materials are filled, and leakage at the joint of the wall connecting groove sections is effectively controlled. Compared with an existing water stopping scheme that a delta-shaped high-pressure jet grouting pile is constructed on the outer side of the fore shaft pipe joint, the function of secondary grouting at the fore shaft pipe joint can be achieved through the arc grooves, the leakage problem is reduced, the construction cost is reduced, the construction period is shortened, and effective water stopping at the fore shaft pipe joint of the underground diaphragm wall is achieved.
本发明涉及一种地下连续墙锁口管接头止水结构的施工方法，其步骤为：在地墙施工阶段，待槽段开挖完成后，在端部插入一根与槽宽相等的锁口管，并进行混凝土浇筑，该锁口管的一侧具有小直径半圆弧槽结构，待混凝土初凝后将锁口管拔出形成一个凹中凹结构；在下幅地墙开挖完成后，先在小凹位置插入钢管后再浇筑混凝土，待混凝土初凝后将钢管拔出，在相邻两幅地墙之间形成圆形孔洞，并做二次注浆处理或填充止水材料，使连墙槽段接头处渗漏得到有效控制。与以往在锁口管接头外侧施工品字形高压旋喷桩的止水方案相比，通过圆弧槽可实现在锁口管接头二次注浆的功能，减少渗漏问题，降低了施工成本、缩短了工期，实现了地下连续墙锁口管接头处有效止水。
Construction method of underground diaphragm wall fore shaft pipe joint water stop structure
一种地下连续墙锁口管接头止水结构的施工方法
HUANG JIANGCHUAN (author) / HE JIAN (author) / LI WEIQIANG (author)
2022-12-20
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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