Backfill grouting material of tunnel

Abstract

The invention relates to a backfill grouting material of a tunnel. The backfill grouting material is prepared from the following components in parts by weight: 90 to 100 parts of a basic performance component, 0.5 to 5 parts of a vibration-absorption performance component and 90 to 300 parts of water, wherein the basic performance component is composed of a material J1 and a material J2; the material J1 is prepared from 85 to 95 weight percent of a cement sintering material and 5 to 15 weight percent of an auxiliary material; the material J2 is prepared form 90 percent of a base material and 10 percent of an auxiliary material; the base material is a mixture of gypsum and lime at any ratio and the auxiliary material is a mixture of a setting accelerator, an early strength agent and a suspension dispersant at any ratio. The invention provides a new thought of a vibration absorption effect of the backfill grouting material of the tunnel and a backfill grouting function is expanded; the grouting material can be adaptive to a tunnel vibration characteristic relatively well; a vibration-absorption principle is combined and the vibration-absorption performance of the material is realizedthrough changing a ratio of an air entraining agent and vibration-absorption particles.

Description

technical field [0001] The invention relates to a post-grouting material for a tunnel wall, belonging to the technical field of construction engineering. Background technique [0002] Underground rail transit has the advantages of large capacity, safety, speed, punctuality, convenience and comfort, and is an ideal means of transportation to solve urban traffic problems. With the network construction and operation of subways in major cities in China, and the continuous improvement of people's environmental requirements, vibration problems generated by subway operations have become increasingly prominent. When the subway is running, random vibration excitation is generated on the subway track. The excitation is transmitted to the ground and ground buildings through the track structure, tunnel structure, and surrounding soil medium, causing vibration of the ground buildings, and even arousing vibrations of doors, windows, equipment, etc. in the structure. Make a sound and gene...

AI Technical Summary

Problems solved by technology

At present, the use of grouting materials behind the tunnel wall for vibration isolation applications has not been reported