The present application belongs to the field of tunnel and roadway
engineering advanced pre-support technology, and specifically relates to a large-thickness soft interlayer advanced
pipe shed grouting integrated construction method for extremely broken surrounding rock. The specific steps include: advanced geological detection
simulation;
grout stopping wall and annular + middle hole
layout; low-speed drilling and synchronous top-in composite
pipe shed; anti-
permeation consolidation, collaborative bearing and rapid sealing
slurry is injected in
layers in the order of from bottom to top, from periphery to middle; detection and supplementary grouting; after grouting is completed, short excavation and short support are carried out, initial support is formed to form a collaborative bearing
system, sensors are arranged, and gray correlation PAM improved RBF neural network dynamic regulation and control are adopted. The present application realizes
pipe shed installation and grouting integration, shortens the
exposure time of surrounding rock, solves the problems of
kaolinite softening and water-rich seepage by customizing
slurry, quantifies grouting pressure and ending standard, avoids grouting blind area and secondary damage through "monitoring-feedback-adjustment"
closed loop, and significantly improves the stability of surrounding rock and construction efficiency.