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研究了在软土地基加固中注浆的压力,根据一般形式的破坏准则,结合超孔隙水压力公式、扩孔和大变形理论推导了软土劈裂注浆压力的理论公式,分析了在不同破坏准则下软土劈裂注浆压力的变化情况。通过对现场试验测得的注浆压力值与注浆压力理论值对比,得出基于Lade-Duncan强度准则和M-C强度准则的注浆压力理论值与现场试验值较为接近,但仍存在一定误差。于是基于Lade-Duncan、SMP和M-C强度准则对试验土层的破坏准则进行了修正,建立了适用于该土层的破坏准则,并提出了一种简单有效的修正方法,为理论研究和工程实践提供了一定的指导意义。
The pressure of grouting in soft soil foundation reinforcement was studied. According to the general form of failure criterion, combined with the theory of excess pore water pressure, reaming and large deformation theory, the theoretical formula of grouting pressure in soft soil was deduced. Variations of pressure on soft soil during grouting under failure criterion. By comparing the measured grouting pressure with the theory of grouting pressure, the theoretical value of grouting pressure based on Lade-Duncan strength criterion and M-C strength criterion is close to the field test value, but there is still some error. Based on the Lade-Duncan, SMP and MC strength criterion, the damage criterion of the test soil is amended and the failure criterion applicable to the soil is established. A simple and effective method of correction is proposed, which is of great value for theoretical research and engineering practice Provide a certain degree of guiding significance.