华信商厦深基坑锚杆试验研究

锚杆支护在我国深基坑开挖和支护中得到了广泛的应用，但对其工作机理和计算方法的研究尚不完善。以一个锚杆支护的深基坑工程为享例，对工程锚杆进行了试验研究。通过试验，测试了锚固体在岩土中摩阻力的分布规律，得出了锚杆的抗拔力，以此为工程设计提供了依据。研究结果表明，锚固体与岩土体间的摩阻力沿锚杆长度不是均匀分布的，其分布规律与摩阻力水平有关，在孔口附近最大，而从孔口沿锚杆长度逐渐衰减；锚杆的承载力与注浆方式有关，且对基坑的开挖较为敏感。

EXPERIMENT STUDY ON ANCHOR FOR DEEP EXCAVATION OF HUAXIN BUILDING

The retaining of anchors is widely used in China, but the principle and calculating method for soil anchor are not clearly understood. In this paper, the tests on soil anchors are carried out based on a deep excavation The distribution of the friction force on the interface between soil and mortar is obtained through test. The test result shows the distribution of the friction force is not uniform and the stress attenuates along the length of anchor, which is maximal in the orifice of hole and related to the level of friction force. The pullout resistance of anchor is obtained by the test, which is correlative to the mode of grouting and sensitive to the excavating. All provide the basis for engineering design.