深基坑通长型GFRP筋杆体施工关键技术与性能研究  

Study on Construction Key Technology and Performance of GFRP Bar Body in Deep Foundation Pit

作　　者：潘潇[1] PAN Xiao(Beijing No.4 Municipal Construction Engineering Co.,Ltd.,Beijing 100028,China)

机构地区：[1]北京市市政四建设工程有限责任公司,北京100028

出　　处：《粉煤灰综合利用》2025年第1期69-73,共5页Fly Ash Comprehensive Utilization

摘　　要：为了提升深基坑工程中通长型玻璃纤维筋(Glass Fiber Reinforced Plastic,GFRP)杆体在复杂应力影响下的施工应用效果,研究深基坑通长型GFRP筋杆体施工关键技术与性能。通长型GFRP筋杆体的锚固端部采用新型夹片,在锚固体上增加承压板。计算GFRP筋的正截面偏心受压承载力,得到当前支护区域所需要的通长型GFRP筋的数量和规格,保证支护效果。结果表明:在拉力约为1000 kN时直径32 mm筋杆体爆裂。基坑6m处基坑墙体发生约为15 mm的最大位移。通过应力云图像和载荷-位移数据确定最佳夹片硬度为GFRP硬度的80%,锚具最佳厚度为6 cm。研究的施工技术具有良好的支护施工应用效果。In order to improve the construction application effect of full-length glass fiber reinforced plastic(GFRP)bars in deep foundation pit engineering under complex stress influence,the key construction technologies and performance of full-length GFRP bars in deep foundation pit engineering are studied.The anchoring end of the full-length GFRP reinforcement rod adopts a new type of clip,and a pressure plate is added to the anchoring body.Calculate the eccentric compressive bearing capacity of GFRP reinforcement in the normal section,obtain the quantity and specifications of full-length GFRP reinforcement required for the current support area,and ensure the support effect.The results indicate that the 32 mm diameter reinforcement rod burst when subjected to a tensile force of approximately 1000 kN.The maximum displacement of the foundation pit wall at 6m is about 15mm.The optimal clamp hardness is determined to be 80% of GFRP hardness and the optimal anchor thickness is 6 cm based on stress cloud images and load displacement data.The construction technology studied has good application effects in supporting construction.

关 键 词：深基坑 玻璃钢筋杆体 通长型 锚固支护 连接器 

分 类 号：TU47[建筑科学—结构工程]