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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摘要厦门机场路一期工程浦南段暗挖隧道具有浅埋、大跨、围岩软弱、周边施工环境复杂等显著特点，在隧道下穿的楼房中，34#楼房是工程中重点保护对象。根据34#楼房结构、地基岩层及周边环境等情况，经过对各种房屋保护方案的可靠性和可操作性等方面进行系统分析，施工中采取地表跟踪注浆施工方法对房屋进行保护。根据104#，105#楼房注浆试验研究效果，确定34#楼房以过程控制和工后恢复为核心的注浆抬升方案，采用袖阀管注浆工艺。为实时掌握34#楼房沉降及裂缝的发展情况，及时指导施工，布置房屋沉降及裂缝发展监测点，监测结果表明：注浆抬升能够有效地抑制房屋的沉降和裂缝的发展，最终房屋的各测点累计沉降值控制在25 mm之内，差异沉降控制在1‰之内，隧道穿越34#楼房的过程中结构安全处于可控状态。注浆抬升对于保护隧道穿越既有建筑物具有重要工程意义，该研究成果为类似的隧道穿越工程提供一定的借鉴。

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关键词 ：隧道工程, 浅埋大跨隧道, 注浆抬升, 房屋保护, 袖阀管注浆, 沉降控制

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

收稿日期: 2010-03-04

引用本文:

彭正勇. 注浆抬升在隧道穿越既有建筑物中的研究及应用[J]. 岩石力学与工程学报, 2011, 30(S1): 2963-2969.
PENG Zhengyong. STUDY OF GROUTING UPLIFTING FOR EXISTING BUILDINGS TRAVERSED BY TUNNEL AND ITS APPLICATION. , 2011, 30(S1): 2963-2969.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS1/2963

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