| 2. | Based on the close analysis of the influence factors of the vertical bearing capacity , circular aperture extension theory is employed to establish the computing formulas for the pile vertical stress and the foundation vertical bearing capacity , respectively . moreover , with analyzing the features of the calculation parameters such as materials of gunite mortar , jet pressure , diameter of the jet pipe , pile length , pile layout , a design theory for chemical churning pile composite foundation is proposed . then , the variation of the pipe deformation with loads , the deformation coordination of pile and soil are studied
在此基础上深入探讨了旋喷桩的桩土受力特性及其复合地基的加固机理,从影响旋喷桩复合地基竖向承载力的因素入手,基于圆孔扩张理论给出了桩体竖向应力及旋喷桩复合地基的竖向承载力计算公式;通过对喷射浆液、喷射压力选取、喷射直径估算、桩长及桩位设计等各种计算参数的深入分析和研究,提出了一套相应的旋喷桩复合地基设计计算方法;通过计算分析,深入探讨了旋喷桩复合地基变形随荷载变化规律、桩和桩间土变形协调关系、桩土应力比及复合地基压缩模量的确定,并提出相应的设计方法和修正参数;此外,结合工程应用,对旋喷桩复合地基的施工技术及其现场质量检测方法进行了较全面的探讨。 |
