注浆抬升在隧道穿越既有建筑物中的研究及应用

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Abstract Subsurface excavation tunnel at Punan section of phase I project of Xiamen airport road is a shallow-buried，large-span and soft rock tunnel，the surrounding construction environment is complex. Building #34 is a key protection object during tunnel traverses buildings. According to the structures，foundation rocks and surrounding environment of building #34，the ground tracking grouting method is adopted to protect buildings during construction by systematically analyzing the reliabilities and operabilities of various building protection schemes. The sleeve valve pipe grouting is adopted for building #34 according to grouting test results of buildings #104，#105. Monitoring points of building subsidence and crack development have been set in order to control the subsidence and crack development of building #34 and guide the construction timely. Monitoring results show that grouting uplift can control houses subsidence effectively. Finally，the total subsidence value of each monitoring point is controlled within 25 mm；the differential subsidence of each monitoring point is controlled within 1‰. The building #34 structures are in control state when tunnel traverses. Therefore，the grouting uplifting is a very important method to protect existing buildings traversed by tunnel. This study results will provide some references for similar tunnel projects.

Key words： tunneling engineering shallow-buried and large-span tunnel grouting uplifting building protection sleeve valve pipe grouting settlement control

Received: 04 March 2010

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https://rockmech.whrsm.ac.cn/EN/Y2011/V30/IS1/2963

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