Underground structure construction method based on cast-in-place foam lightweight materials

Abstract

The invention discloses an underground structure construction method based on cast-in-place foam lightweight materials. The underground structure construction method comprises the steps that a pouring substrate is cleaned, and the effect that no rubbish or water exists on the substrate is ensured; a waterproof geomembrane is laid on the bottom surface of a filling body; the filling heights of all layers are calculated; modules are made and installed; a pouring body is divided into sections, layers and blocks; a template is arranged for the pouring body divided into the sections, the layers and the blocks; foam lightweight soil is poured according to the sections, layers and blocks obtained through division; a metal net is arranged in the position 0.5 m-1 m below the top of a filling layer; the surface is covered with a plastic thin film for hydrating maintenance; and backfill construction is conducted on the top face and the side face of the filling layer of the cast-in-place foam lightweight soil with common soil. Through the embodiment of the underground structure construction method, the cast-in-place foam lightweight soil is adopted as load reducing materials, and the construction method that an underground structure is covered with filling soil for load reducing is adopted and is simpler, more convenient, faster, and low in cost compared with other construction methods for solving the problem of deformation of underground structures.

Description

technical field [0001] The invention relates to the technical field of construction industry, in particular to a method for underground structure construction based on cast-in-place foam lightweight materials. Background technique [0002] Foam lightweight material, that is, foam lightweight soil, is a foam that contains a large number of small closed pores and has a considerable strength by introducing air gas into the foam slurry according to the application needs by chemical or physical means, and after reasonable maintenance and molding. The production method is usually to prepare the foam agent aqueous solution into foam by mechanical method, and then add the foam to the slurry composed of siliceous material, calcium material, water and various additives, etc., after mixing and stirring, pouring A porous material formed and cured. [0003] In underground structure engineering, the design of the underground structure requires that the load of the covering soil must be w...

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Problems solved by technology

[0005] Aiming at the shortcomings of the existing underground structure construction, the present invention provides a method for underground structure construction based on cast-in-place foam lightweight materials, using cast-in-place foam lightweight soil as the load-reducing material, and filling soil on the underground structure The construction method of load reduction is simpler and more convenient than other construction methods to solve the deformation of underground structures, and the cost is low

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