某电厂工程地基承载力与深度修正系数的取值

Determination for Bearing Capacity and Depth Correction Factor of Foundation in One Power Plant

在进行地基基础设计时,需要结合地基条件对承载力特征值进行深度与宽度的修正,而地基规范中提供的承载力修正系数针对性不强,在工程实践中应慎重采用。本文根据某电厂工程的浅层与深层平板载荷试验成果,并采用地基承载力的经验公式与理论公式进行承载力计算,通过综合分析各种承载力试验成果与计算结果,推荐了主要持力层的承载力特征值,在此基础上推算出持力层的深度修正系数。对比前期工程的平板载荷试验成果,进一步分析了影响地基承载力取值的主要因素,旨在为类似工程提供一些参考。

In the foundation design,the characteristic value of bearing capacity should be amended by depth and width linking with the ground condition,whereas the correction factor of bearing capacity should be adopted carefully in the project owing to its statistic property.According to the results of Shallow and Deep PLT,the characteristic value of bearing capacity is recommended for the bearing stratum,basing on comprehensive analysis for various testing results and the calculated outcomes derived from the empirical and theoretical formulas to the bearing capacity,herein the depth correction factor is deduced for the bearing stratum.Comparing with the PLT results of the projects in different phase,the primary factors are analyzed in determination for bearing capacity,it aims to provide some suggestions for similar projects.