深圳市谷對嶺分岔隧道無中導洞施工與監測技術*

彭俊聰¹，楊四海¹，李曉冉^2,3，丁文其^2,3，段超^2,3 

(1.中國路橋工程有限責任公司，北京 100011；2.同濟大學土木工程學院地下建筑與工程系，上海 200092；3.同濟大學巖土及地下工程教育部重點實驗室，上海 200092)

［摘要］分岔大斷面隧道施工常面臨地質條件差、周邊環境復雜等問題，結合深圳市谷對嶺分岔隧道工程情況，采用先行隧道獨立成型，后在大斷面處實現掉頭再施工后行隧道的分岔隧道無中導洞施工方法。梳理4個技術階段，包括連拱段施工、由先行匝道小斷面進入主線大斷面施工、主線大斷面實現掉頭施工及主線大斷面施工等關鍵點。在施工的同時進行全程監控測量，據此針對性提出分部分階段監測方案，并分析連拱隧道段和大斷面段的監測數據結果，從而指導設計，確保施工安全。

［關鍵詞］隧道；城市分岔隧道；無中導洞；匝道；監測；施工技術

［中圖分類號］U456.3     ［文獻標識碼］A     ［文章編號］1002-8498(2021)18-0031-05

Construction and Monitroing Method of Guduiling Bifurcated Tunnel Without Middle Pilot Heading in Shenzhen

PENG Juncong¹, YANG Sihai¹, LI Xiaoran^2,3, DING Wenqi^2,3, DUAN Chao^2,3 

(1.China Road and Bridge Corporation, Beijing 100011, China; 2.Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China; 3.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China)

Abstract:To solve the construction problems caused by poor geo conditions and complicated surrounding conditions, combined with the construction of Guduiling Bifurcated Tunnel in  Shenzhen, firstly, a method of independent tunnel forming was adopted, and then, the construction of turning at the large section, and finally the construction of bifurcated tunnel using central pilot free construction technology. And the four construction stages were summarized, including such key points as construction of multi arch section construction from small section of the ramp to large section of main line, construction of turning at the large section, and construction of large section, etc. Meanwhile, the entire process monitoring measurement was carried out during the construction. Accordingly, the monitoring scheme by parts and stages was put forward in this paper, and the monitoring data and results of multi arch tunnel section and large section were analyzed to guide the design and ensure the safety of construction.

Keywords:tunnels;urban forked tunnels;tunnel without middle pilot heading;ramp;monitoring;construction

*國家自然科學基金（51578408）；深圳東部過境高速公路連線工程項目：復雜環境下淺埋大斷面互通隧道結構關鍵技術研究（20133139）；山區高速公路地下互通立交建設與運營安全關鍵技術研究（云交科教〔2018〕40號）

［作者簡介］彭俊聰，碩士研究生，高級工程師，Email：1208662940@qq.com

［通信作者］李曉冉，碩士研究生，Email：1932255@#edu.cn