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潘   潇

 

（北京市市政四建设工程有限责任公司 ，北京 100028)

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。 

关键词：深基坑 ；玻璃钢筋杆体 ；通长型 ；锚固支护 ；连接器

中图分类号：TU47           

文献标志码：A           

文章编号： 1005- 8249   (2025)  01- 0069- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .01 .014

 

PAN Xiao

(Beijing No. 4 Municipal Construction Engineering Co. ，Ltd. ，Beijing 100028 ,   China)

Abstract: 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.

Keywords: deep foundation pit; glass fiber reinforced plastic; key technology; long type; 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。

收稿日期：2024 - 12 - 17