回填土作用下的竖向分层土主动土压力分析  

Calculation Method and Analysis of Active Earth Pressure of Vertical Layered Soil under Backfill Soil

作　　者：高伟[1] GAO Wei(Xi’an Aeronautical University,Xi’an 710077,China)

机构地区：[1]西安航空学院,陕西西安710077

出　　处：《粉煤灰综合利用》2022年第3期36-42,共7页Fly Ash Comprehensive Utilization

摘　　要：分层土主动土压力以水平向研究较多,竖向分层土土压力计算还少见。基于极限平衡分析方法,推导回填土作用下的竖向分层土主动土压力计算公式,并分析墙土摩擦角δ、墙背倾角β、回填土深度h、回填土范围a、回填土抗剪强度指标C和φ对主动土压力及破裂角的影响。研究结果表明:本文土压力计算方法适用更广,规范法给出公式是本文方法的特殊情况;主动土压力随着δ、β、C、φ的增大逐渐降低,随着h和a的增大逐渐增加,其中a、C、φ对土压力影响较大;破裂角随着δ、β、h、C的增大逐渐降低,随着回填土范围a的增大先上升后逐渐趋缓,随着φ的增大先降低后增加。Active soil pressure of stratified soil is studied in horizontal direction more often than in vertical stratified soil.Based on the limit equilibrium analysis method,the formula for calculating the active soil pressure of vertical layered soil under the action of backfill soil is derived,and the wall soil friction angleδ,wall backtilt angleβ,backfill soil depth h,range a,shear strength index a andφ,are analyzed on active earth pressure and rupture angle.The research results show that the earth pressure calculation method in this paper is more applicable,and the formula given in the normative method is a special case of this method.The active earth pressure gradually decreases with the increase ofδ,β,C,φand gradually increase with the increase of h and a,among which a,C andφhave a greater effect on earth pressure.The rupture angle gradually decreases with the increase ofδ,β,h and C,and then gradually increases with the increase of a,then gradually decreases,the increase is first reduced and then increased with the increase ofφ.

关 键 词：回填土 竖向分层 主动土压力 破裂角 

分 类 号：TU432[建筑科学—岩土工程]