Trenchless rehabilitation lining can be divided into flexible solid wall structures, rigid structures and rigid–flexible composite structures. This paper reviews the research status of design theory trenchless pipes, analyzes points out that value factor determined from non-grouting angle K1 is not clear in formula structure mentioned ASTM ‘Standard Practice for Installation Machine Spiral Woun...

To explore solutions for reinforcement problems of broken rock masses in deep roadways, it is necessary to study the performance cement-based grout and its effect. In this study, grouting-reinforced specimens with different particle sizes coal were made, which revealed effect grouting on bearing capacity mechanism secondary damage instability reinforced specimens. First, was determined that app...

The mining-induced overburden bed separation grouting technique can control surface subsidence through the high-pressure and filling into during mining. physical simulation method be used to objectively reproduce dynamic migration process of slurry in but traditional similar-simulation materials are not suitable for grouting. Considering water disintegration, weak storage capacity, poor permeab...

A dynamic numerical method is established to simulate the stability of surrounding rocks retained roadway in FLAC3D, along with a double-yield constitutive model re-compaction process gangue and strain-softening characteristic coal grouted fragmented after yielding. The simulation reveals that grouting slurry diffusion range, mining affecting stage behind working face rib deformation are closel...

Research on tunnel excavation has rarely considered the effect of a complete building. Therefore, this paper building with double basement and piles, three-dimensional finite-element model for shield tunnels undercrossing an existing was established to study effects double-shield displacement internal forces soil, segments, buildings. Grouting reinforcement technology used in analyze grouting p...

Uniaxial compressive strength (UCS) is the mechanical properties currently used in geotechnical works design, namely in jet grouting (JG) treatments. However, when working with this soil improvement technology, due to its inherent geological complexity and high number of variables involved, such design is a hard, perhaps very hard task. To help in such task, a support vector machine (SVM), whic...