摘要
以太原粉质粘土水文地质条件为背景进行土钉墙施工,应用正交试验,选取土钉长度、土钉与土体的锚固力、基坑一次开挖深度、土钉的排距作为主要因素,以地表沉降、坑底隆起、坑壁水平位移作为指标分析土钉墙施工的稳定性特征。基于FLAC3D软件模拟监测数据,origin数据处理软件分析确定该地区粉质粘土地质土钉墙施工支护的最优方案,基坑一次开挖深度为土钉墙施工的重要影响因素。
Based on the hydrogeological conditions of silty clay in Taiyuan, the construction of soil nailing wall. By orthogonal test, the selection of soil nail length, between soil nail and soil cohesion pit a excavation depth and soil nailing row spacing as four main factors in the construction of soil nailing wall.The surface subsidence, uplift and pit wall horizontal displacement as the characteristic index of the stability of soil nailing wall construction were analyzed.Based on the FLAC3D software simulation monitoring data, the origin data processing software visual analysis for the Taiyuan silty clay geological characteristics determine the optimal soil nailing wall construction support program. At the same time, it is concluded that the excavation depth of foundation pit is an important influence factor of soil nailing wall construction.
引文
[1]古海东,杨敏.土钉墙在疏排桩支护基坑中的加固效果试验研究[J].土木工程学报,2015,48(1):129-138,148.
[2]王立峰.土钉墙面层土压力的计算分析[J].岩土力学,2010,31(5):1615-1620,1626.
[3]秦会来,周同和,郭院成,等.土钉墙地基承载力问题探讨[J].岩土力学,2014,35(S2):393-397.
[4]李小勇,谢康和,白晓红,等.太原粉质粘土强度指标的空间概率特征研究[J].岩土工程学报,2000,22(6):668-672.
[5]林志强,赵维炳,林生法,等.土体强度对土钉墙设计参数及经济性影响分析[J].地下空间与工程学报,2015,11(6):1611-1616.
[6]李小勇,谢康和,虞颜.太原粉质粘土强度指标概率特征[J].浙江大学学报(工学版),2001,35(5):30-34.
[7]熊宗喜,刘红岩,李海明,等.砂卵石地层预应力锚索复合土钉支护工作机理的数值试验[J].建筑技术,2015,46(1):74-78.
[8]林旭武,严平.土钉抗拔力的可靠度分析[J].建筑技术,2007,38(12):928-930.
[9]付文光,杨志银,刘俊岩,等.复合土钉墙的若干理论问题、兼论《复合土钉墙基坑支护技术规范》[J].岩石力学与工程学报,2012,31(11):2291-2304.
[10]张玉成,杨光华,吴舒界,等.土钉支护结构变形与稳定性关系探讨[J].岩土力学,2014,35(1):238-247.