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周艷

(上海市政工程設(shè)計(jì)研究總院（集團(tuán)）有限公司， 上海 200092)

［摘要］鄰近地鐵區(qū)間隧道需要確保嚴(yán)格的變形保護(hù)要求，基坑的計(jì)算分析不再以強(qiáng)度控制，而是以變形控制。介紹了杭州市蕭山區(qū)中心城區(qū)一個(gè)緊鄰運(yùn)營(yíng)地鐵的深基坑工程。為有效保護(hù)地鐵區(qū)間隧道和地鐵車站安全，采用了合理的圍護(hù)結(jié)構(gòu)、支撐系統(tǒng)和土方開挖方案，并加以多項(xiàng)輔助保護(hù)措施。對(duì)基坑開挖對(duì)于地鐵區(qū)間隧道和地鐵車站的影響進(jìn)行了數(shù)值模擬分析。并在工程施工過(guò)程中對(duì)基坑本身、地鐵區(qū)間隧道和地鐵車站都進(jìn)行了詳盡的監(jiān)測(cè)，監(jiān)測(cè)結(jié)果表明，基坑本身安全、對(duì)鄰近地鐵區(qū)間隧道和地鐵車站的影響都在安全可控的范圍內(nèi)。結(jié)合實(shí)際深基坑工程的計(jì)算分析和實(shí)踐的成功經(jīng)驗(yàn)總結(jié)對(duì)類似深基坑工程具有參考價(jià)值。

［關(guān)鍵詞］深基坑； 地鐵隧道； 地鐵車站； 變形控制

中圖分類號(hào)： TU46+3 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)： 1002-848X(2015)S2-0102-05

 作者簡(jiǎn)介：周艷，碩士，工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: zhouyan@smedi.com。

Design and construction of deep excavation engineering adjacent to the subway tunnel

Zhou Yan

(Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, China)

Abstract： Strict deformation control is critical in the excavation engineering adjacent to the running subway tunnels and design should target at controlling deformation rather than strength. A deep excavation adjacent to the running subway tunnels in Xiaoshan district, Hangzhou, was introduced. In order to protect subway tunnels and the subway station, appropriate retaining wall and horizontal support system were applied, earth excavation were reasonably arranged. Besides, multiple protection methods were applied. The additional deformation of tunnels was predicted by numerical analysis. Detailed monitoring in situ of the pit and tunnels was carried out during excavation. According to the in situ monitoring data, protection of the adjacent subway tunnels and the subway station was effective, which testified the validity of design and construction of the excavation engineering in soft soil. The research on the design method and measurements of the deep excavation, which is on the basis of successful design and construction, can be applied to similar projects.

Keywords： deep excavation; subway tunnel; subway station; deformation control