深基坑复合土钉墙支护FLAC-3D模拟及大型现场原位测试研究  

FLAC-3D simulation of deep excavation with compound soil nailing support

作　　者：吴忠诚[1] 汤连生[1] 廖志强[1] 刘晓纲[2] 颜波[1] 

机构地区：[1]中山大学地球科学系岩土工程研究所 [2]重庆大学,重庆400044

出　　处：《岩土工程学报》2006年第B11期1460-1465,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(50279056);广东省自然科学基金资助项目(031601);广东省科技计划项目(2003C33301;2004B32801002)

摘　　要：应用FLAC-3D建立了深基坑复合土钉墙支护模拟模型。该模型可对预应力锚索复合土钉支护结构进行开挖支护施工过程的三维动态模拟分析。然后,通过大型深基坑复合土钉墙支护工程现场原位的测试,得到了深基坑水平位移、竖直位移、土钉与锚索的内力、土体应力应变等现场原位测试数据,进行了模拟模型与现场原位测试数据的拟合及对比分析,说明建立的三维数值模拟分析模型能够反映复合土钉支护的基坑在开挖过程中的受力和变形特征。这也为深基坑复合土钉墙支护技术的设计和施工提供指导,并对深入了解复合土钉墙支护作用的机理有较大意义。FLAC-3D was employed to establish a model to simulate the deep excavation compound soil nailing. The model simulates and analyzes the process of excavation discharge dynamically by the prestress compound soil nailing support. Through the test results and analysis of large deep excavation with the compound soil nailing, the horizontal displacement of the deep excavation, vertical displacement, internal force of soil nailing and cable, stress and strain of soils were obtained. The 3D simulation could reflect engineering situation. It is helpful to the design and construction of the deep excavation with the compound soil nailing.

关 键 词：深基坑 复合土钉墙 支护 FLAC-3D 现场测试 

分 类 号：TU473[建筑科学—结构工程]