基于变形模式的注浆精细化变形控制与修复的机理及效果研究

The underground engineering construction is inevitable to cause incline, settlement and other adverse deformation of adjacent buildings and tunnels. Once the accident occurs caused by the improper deformation control measures, the social influence is extremely serious. At present, as an effective means of deformation control and restore, the grouting technology is still in the "extensive form" stage. This project proposes to use grouting to control and restore the deformation caused in the process of underground engineering construction precisely based on the deformation model. The deformation models of adjacent buildings (or tunnels) caused by underground engineering construction are studied, and the simplified calculation formulas of deformation models are proposed. Based on the deformation model, a series of laboratory tests are performed to study the effects of different factors on grouting efficiency and analyze the influence mechanism and sensitivity ranking of different factors. The mechanism of grouting to control and restore the deformation precisely based on the deformation model is revealed. According to the existing experience of grouting engineering and the research results of the effect of grouting to control and restore deformation precisely based on deformation mode, the precisely grouting design method based on deformation mode is established to provide effective technical guidance for engineering practice.

地下工程建设过程中不可避免的会引起临近建筑物、隧道等的倾斜、沉降等不良变形，一旦变形控制不当，发生事故，社会影响极为严重。目前注浆技术作为一种有效的变形控制和修复手段，尚处于“粗放型”阶段。本项目提出依据变形模式进行精细化注浆以控制和修复地下工程建设过程中引起的变形，通过数值模型计算研究地下工程建设引起临近建筑物（隧道）变形模式，并提炼出变形的简化计算公式；基于变形模式，采用模型试验方法进行不同因素对注浆控制和修复变形效果的影响规律研究，分析不同因素的影响机制及敏感度排序，揭示基于变形模式的注浆精细化变形控制与修复机理；根据已有的注浆工程经验以及基于变形模式的注浆精细化变形控制与修复效果的研究成果，建立基于变形模式的精细化注浆设计方法，为工程实践提供有效地技术性指导。

地下工程施工过程中，如何控制和恢复地层损失所带来的建筑物、隧道等的倾斜、沉降等不良变形是项目成功的关键。目前注浆技术作为一种有效的变形控制和修复手段，尚处于“粗放型”阶段。本项目基于工程案例实测数据系统地分析了围护结构和周围地表的变形规律，归纳了变形特点；采用数值模型计算研究了不同注浆参数对地表位移以及土体内部变形的影响，确立了不同注浆参数与注浆效果的关联；最后结合大量的室内模型试验数据，系统地进行了基于变形模式的注浆精细化变形控制与修复机理研究，为工程实践提供有效地技术性指导。