复合土钉支护的FLAC3D数值模拟

FLAC3D NUMBERICAL SIMULATION OF COMPOSITE SOIL NAILING

为了分析复合土钉支护,以天津津湾广场基坑支护为例进行模拟计算。采用FLAC3D软件建立复合土钉支护模型,其中包括土钉、锚杆、微型桩、搅拌桩和喷射混凝土面层,并按照施工步骤进行求解,得出模拟结果。运用杨光华提出的增量法与台阶式土钉墙的土压力计算方法对该支护结构进行计算,得出计算结果。并分别将模拟结果、计算结果中的土钉轴力与土体水平位移进行对比,以确定该种数值分析方式的可行性。分析结果对复合土钉支护的设计有一定的参考价值。

In order to analysis the composite soil nailing, simulations and calculations of it which is located in Tianjin Jinwan square were carried out. Models which were composed of soil nailings, anchors, mini piles, mixing piles and shotcrete layers were simulated by the FLAC3 D software, and it was solved according to the construction steps, which revealed the simulation＇ s results. The incremental method proposed by Yang Guanghua and the calculation method of the stepped soil-nail wall were applied to the calculation of this supporting struture, which revealed the calculation＇ s results, too. The axial force of the soil nailing and the horizontal displacement of the foundation＇ s side were compared between the results from the simulation and calculation, to determine the feasibility of this numerical analysis. The analysis results have certain referential meaning to the design of the composite soil nailing.