植筋技术用于格梁缺陷加固的模型试验研究  

Model Tests Study on Reinforcing Technique of Lattice Defects Embedding Steel Bars

作　　者：梁炯[1,2] 周云涛[1,2] 石胜伟[1,2] 张勇[1,2] 蔡强[1,2] 蔡佳君[1,2] LIANG Jiong;ZHOU Yuntao;SHI Shengwei;ZHANG Yong;CAI Qiang;CAI Jiajun(Institute of Exploration Technology, Chinese Academy of Geological Sciences, Chengdu 611734, China;Technical Center for Geological Hazard Prevention and Control, CGS, Chengdu 611734, China)

机构地区：[1]中国地质科学院探矿工艺研究所,四川成都611734 [2]中国地质调查局地质灾害防治技术中心,四川成都611734

出　　处：《人民黄河》2019年第2期143-147,共5页Yellow River

基　　金：国土资源部公益性行业科研专项(201511051)

摘　　要：通过开展植筋技术用于格梁缺陷加固的模型试验研究,分析了植筋技术加固前后格梁随着荷载的增加,内力和弯矩的变化情况,结果表明:滑坡推力作用在植筋层和格梁复合体上时,二者并不是同时受力,植筋层先于格梁受力,植筋层所承受的荷载分担比约为78%;经过植筋技术加固缺陷格梁后,配筋受力得到改善,加固后配筋最大应力比加固前降低了36.5%;植筋技术加固后缺陷格梁弯矩明显降低,为加固前的20%～30%,说明植筋技术加固缺陷格梁效果显著。The variation laws of internal force and moment of the beams were analyzed with the increase of loads before and after the lattices were repaired , based on the experimental study on reinforcing technique of the lattice defects embedding steel bars. The results show that when the thrust of the landslide forces acted on the composite of planting bar layer and the girder , the two are not simultaneously stressed , and it can be indicated that the planting bar layer is subjected to the force of the grid beam , and the load sharing ratio is about 78%. After planting bar reinforcement , the planting bar stress is improved , and the maximum stress after planting bar reinforcement is 36.5% lower than that before reinforcement. After embedding bar reinforcement , the bending moment of the beams is obviously reduced , that is about 20%-30% before reinforcement. It can be indicated that the effect of planting bar reinforcement is remarkable.

关 键 词：滑坡 锚杆格梁 植筋技术 模型试验 

分 类 号：P642.22[天文地球—工程地质学]