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.
作者
潘潇
PAN Xiao(Beijing No.4 Municipal Construction Engineering Co.,Ltd.,Beijing 100028,China)
出处
《粉煤灰综合利用》
2025年第1期69-73,共5页
Fly Ash Comprehensive Utilization
关键词
深基坑
玻璃钢筋杆体
通长型
锚固支护
连接器
deep foundation pit
glass fiber reinforced plastic
full-length
anchor support
coupler
作者简介
潘潇(1981-),男,本科,高级工程师,研究方向:城市地铁地下结构施工、市政道路桥梁施工等。
