Construction method of underground diaphragm wall

Abstract

The invention provides a construction method of an underground diaphragm wall. The construction method comprises the steps of conducting groove milling treatment on a first preset groove milling area of the underground diaphragm wall; conducting pouring construction operation of the first underground wall in a first notch, wherein the concrete thickness of the end, at least facing a second underground wall, of the first underground wall is larger than the thickness of a preset protection layer, and the concrete layer of the exceeding part serves as a meshing protection layer; and adopting double-wheel milling equipment for conducting groove milling treatment on a second preset groove milling area, and adopting the double-wheel milling equipment for conducting groove milling treatment on the meshing protection layer in the wall construction step, so that a first meshing body is formed on the end face of the meshing protection layer. According to the construction method of the underground diaphragm wall provided by the invention, the adjacent underground wall bodies are meshed and overlapped, so that connection between the underground wall bodies is achieved to form the underground diaphragm wall, the water stopping effect can be achieved on the basis that the structure of a connector of the underground diaphragm wall is not changed, construction of water stopping structures such as water stopping pieces is avoided, operation is convenient, safety and reliability are achieved, the working efficiency is improved, and the engineering cost is also saved.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a construction method for an underground continuous wall. Background technique [0002] Since the 21st century, with the rapid development of social economy, my country's subway has ushered in an unprecedented construction climax. By the end of 2016, the number of cities under construction in mainland China has increased to 53, with a total length of 4400km. As a common form of retaining wall for the main foundation pit enclosure of urban subways, the underground diaphragm wall has been widely used because of its reliable strength, high rigidity, and good integrity. [0003] At present, the forms of underground diaphragm wall joints are: 1. joint pipe joints; 2. joint box joints; 3. clapboard joints; 4. steel plate composite joints; [0004] For the current underground structure construction, the commonly used interface form is H-shaped steel interface or lock p...

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Problems solved by technology

[0005] In view of this, the present invention proposes a construction method of an underground diaphragm wall, aiming at solving the problem that the existing diaphragm wall interface seriously affects the construction progress and causes certain economic losses

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