岩土工程学报Issue(z2)：418-423,6.DOI:10.11779/CJGE2014S2073
基坑工程内支撑抱箍式活络头力学性能试验研究
Experimental study on mechanical properties of hoop-disconnectable coupling in internal support system of excavation engineering
摘要
Abstract
In order to improve the force way of the traditional disconnectable coupling in excavation engineering to further increase its security and stability, the design and development about the new hoop-disconnectable coupling are performed. Through axial compression tests, the mechanical properties of different specimens are studied. The main conclusions are drawn as follows: (1) the stiffness of the hoop-disconnectable coupling is higher than that of the traditional one; (2) under in the same load, the displacement of the traditional is larger; (3) under normal operation, the specimens can be reused; (4) when the ultimate bearing capacity is reached, the hoop-disconnectable coupling exhibits tiny brittle failure and after slipping, and it can continue to carry; (5) due to the clamping action of the bottom bolts, when the adjustable length is short, namely the larger contact area, the carrying capacity instead decreases; (6) under the axial compression, the pretension of bolts is essentially unchanged.关键词
基坑工程/钢支撑/活络头/轴压试验/力学性能Key words
excavation engineering/steel bracing/disconnectable coupling/axial compression test/mechanical property分类
建筑与水利引用本文复制引用
张明聚,赵鸿超..基坑工程内支撑抱箍式活络头力学性能试验研究[J].岩土工程学报,2014,(z2):418-423,6.基金项目
北京市教育委员会科技计划重点项目（KZ201410005007）；城市与工程安全减灾教育部重点实验室/工程抗震与结构诊治北京市重点实验室重点项目 （）
