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桩锚支护结构在基坑和边坡围护工程中有着广泛的应用,设计阶段对支护结构的水平变形作出准确预测意义重大。根据国内多地基坑工程围护墙变形实测结果,建立桩锚支护结构水平位移的计算模型和计算假定,计算基坑围护墙在各外力作用下的变形,利用弹性叠加法得出桩锚支护结构围护墙深层水平位移表达式,联立锚杆刚度方程求解出其中的参数,最终得到水平位移的简化计算结果。该简化算法适用于围护墙底变形较小的桩锚支护结构计算,通过温州某基坑工程实例对比,围护墙变形计算结果与实测数据较为吻合,验证了该简化算法的适用性。
Pile-anchor supporting structure has a wide range of applications in foundation pit and slope protection engineering. It is significant to accurately predict the horizontal deformation of the supporting structure in the design stage. According to the deformation measurement results of the retaining wall in the multi-foundation pit project in China, the calculation model and calculation assumptions of the horizontal displacement of the pile-anchor supporting structure are established and the deformation of the retaining wall of the foundation pit under each external force is calculated. The horizontal displacement expression of the retaining wall of the retaining structure and the stiffness equation of the simultaneous anchorage system solve the parameters therein, and the simplified calculation result of the horizontal displacement is finally obtained. The simplified algorithm is suitable for the calculation of the pile-anchor supporting structure with small deformation of the retaining wall. The comparison between the engineering example of a foundation pit in Wenzhou and the deformation calculation result of the retaining wall is in good agreement with the measured data, which verifies the applicability of the simplified algorithm.