圆形隧道球孔注浆压力的广义SMP强度准则解答

Solutions to the Spherical Cavity Grouting Pressure in Circular Tunnels Based on the Generalized SMP Strength Criterion

采用合理考虑土体强度中间主应力效应的广义SMP强度准则,对球形孔的挤压注浆过程进行理论分析,建立了圆形隧道注浆压力的广义SMP强度准则解答,并与文献实测值进行对比验证,同时结合文献已有的MC强度准则解答,分析土体强度参数对注浆压力的影响特性。结果表明:文章基于广义SMP强度准则的注浆压力高于文献的MC强度准则解答,更有利于工程中球形孔注浆压力的实际范围设定;土体强度参数对注浆压力的影响显著,且粘聚力较内摩擦角的影响更为明显。

Based on the generalized spatially mobilized plane(SMP)strength criterion,which reasonably considers the effect of intermediate principal stress on soil mass strength,this paper theoretically analyzes the spherical cavity compaction grouting process,establishes the generalized SMP strength criterion based solutions to the grouting pressure in circular tunnels,and verifies it by comparing with the measured values in the literature.At the same time,in combination with existing solutions based on MC strength criterion in the literature,this paper analyzes the characteristics of the influence of soil strength parameters on the grouting pressure.The results show that the grouting pressure based on the generalized SMP strength criterion is higher than that in the literature based on MC strength criterion,and is more conducive to setting the actual range of spherical cavity grouting pressure in engineering;the effect of strength parameters of soil mass on grouting pressure is significant,and the effect of cohesion is more significant than that of internal friction angle.