緊鄰地鐵復雜深基坑地下結構綜合施工技術

許楊超，葉曉東，李鑫睿，劉光旭

(中建三局集團有限公司，北京 100097)

［摘要］某棚戶區改造項目深基坑分倉施工緊鄰正在運營地鐵，為控制地鐵結構變形，支護設計方案豎向設3道鋼支撐。拆撐約束條件及其他邊界條件給結構施工帶來一系列組織與技術難題，如安全要求苛刻、施工間歇多、作業面狹小、回填難度大、防水逆做等。通過前期施工策劃、重視細部節點處理工藝等，最終使復雜結構施工滿足各方要求，順利實現工程質量、安全、進度目標。

［關鍵詞］深基坑；支護；鋼支撐；防水；施工技術

［中圖分類號］TU753    ［文獻標識碼］A    ［文章編號］1002-8498(2021)19-0106-04

Comprehensive Construction Technology of Complex Deep Foundation Excavation Underground Structure Adjacent to Subway

XU Yangchao, YE Xiaodong, LI Xinrui, LIU Guangxu

(China Construction Third Engineering Bureau Group Co., Ltd., Beijing 100097, China)

Abstract:The sub storage construction of a deep foundation pit of a shanty town reconstruction project is adjacent to a currently operating subway. To control the deformation of the subway structure, three vertical steel supports were set up in the supporting design scheme. Dismantling constraints and other boundary conditions brought a series of organizational and technical problems to the construction of the structure, such as strict safety requirements, multiple construction intervals, narrow work surface, difficult backfilling, and waterproof reverse construction, etc. Through pre construction planning and much attention to detail node processing technology, etc., the construction of complex structures has eventually met the requirements of all parties, and the project quality, safety, and schedule goals have all been smoothly achieved.

Keywords:deep foundation excavation;supports;steel support;waterproofing;construction

［作者簡介］許楊超，工程師，Email:920487507@qq.com