Subsea tunnel combined grouting parameter determining method and system

Abstract

The invention discloses a subsea tunnel combined grouting parameter determining method and system. The subsea tunnel combined grouting parameter determining method comprises, according to a surrounding rock deformation threshold, determining the vein structural layer thickness, the vein structural elastic modulus, the vein structural Poisson ratio, the squeezing stratum elastic modulus and the squeezing stratum Poison ratio of a combined grouting circle; according to a seepage threshold, determining the permeation coefficient of a reinforcing circle; according to the permeation coefficient ofthe reinforcing circle, the vein structural layer thickness and a combined reinforcing area thickness, determining splitting grouting pressure and permeation grouting pressure; according to the vein structural elastic modulus, the vein structural Poisson ratio, the squeezing stratum elastic modulus and the squeezing stratum Poison ratio, determining compressive strength and bending strength; according to the compressive strength and the bending strength, determining a grouting rate. The subsea tunnel combined grouting parameter determining method takes into overall consideration subsea tunnelreinforcement and water plugging, effectively subjectivity of subsea tunnel grouting design and can be applied to guiding technical implementation of subsea tunnel combined grouting to achieve scientific and precise grouting design and improve the safety performance of subsea tunnels.

Description

technical field [0001] The invention relates to the field of subsea tunnel grouting, in particular to a method and system for determining composite grouting parameters of a subsea tunnel. Background technique [0002] Subsea tunnels are subjected to continuous high water pressure, and crossing unfavorable geological bodies and stratum structure interfaces is usually a control project for the construction of subsea tunnels. In order to ensure the safe construction of subsea tunnels passing through unfavorable geological bodies, grouting reinforcement or freezing method is often used to assist construction. Among them, grouting reinforcement has become the preferred reinforcement method due to its mature technology, simple equipment, relatively low cost and good effect. The common grouting reinforcement processes are filling, extrusion, infiltration, and split grouting. However, the geological conditions of subsea tunnels are complex, and there is unlimited water supply. The f...

AI Technical Summary

Problems solved by technology

However, the grouting reinforcement formed by the existing single grouting method has high randomness, the grouting parameters are determined by experience, the grouting effect is poor, and it cannot meet the dual requirements of reinforcement and water blocking at the same time, so many safety accidents have been induced. The construction period was also greatly delayed

Images