注浆沉降法建筑物纠偏加固机理与关键技术研究
MECHANISMS AND KEY TECHNOLOGY OF RECTIFICATION AND REINFORCEMENT OF STRUCTURE BY GROUTING
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摘要: 结合用注浆沉降法并辅以高压旋喷注浆对某小区典型不均匀沉降建筑物进行纠偏和地基加固的工程实例,着重分析了注浆沉降法纠偏加固的技术原理,并讨论该工法的控制要点;对注浆浆液配合比、注浆孔平面位置、加固深度、注浆量、注浆压力、高压旋喷注浆等设计参数的影响进行了研究探讨,提出加强纠偏加固施工动态控制的重要性。研究和工程实践表明,用注浆沉浆法并选用合适的注浆参数进行建筑物纠偏和地基加固,能使建筑物不均匀沉降得到调整的同时,复合地基承载力得到提高,具有较好的建筑物纠偏和地基加固效果。Abstract: This paper discusses mechanisms and technical parameters of structure reinforced by grouting with an engineering case study.Jet grouting parameters and their influence on the design parameters such as grout grading,layout of grouting holes,grouting depth,grouting capacity and grouting pressure were discussed.Importance of dynamic control during the construction was emphasized.Monitoring results and analysis show that the two-shot grouting combining complementary jet grouting was effective and feasible way to rectify and reinforce a non-uniform settlement building.
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