摘要
规范通过确定支撑不动点调整系数λ来考虑非对称荷载作用下内支撑与围护结构的受力平衡,但没有明确给出λ的计算方法,实际工程中依靠经验来选择λ可能导致设计不合理。结合规范中支撑式结构设计理论和桩(墙)支护结构位移与土压力变化规律,通过对土体和桩(墙)支护结构在小变形条件下变形、受力的合理假设,提出了非对称荷载作用下桩(墙)支护结构相对于土体移动的土压力计算方法;对非对称荷载作用下土体、内支撑与围护结构的变形、受力进行理论推导,提出了λ的定量计算方法(λ值法)。结合实际工程,将λ值法与实际监测数据对比,计算结果表明,λ值法计算内支撑弹性支点刚度系数符合工程实际,能够避免因λ取值的主观性而导致的误差。
The specification considers the support fixed point adjustment coefficient of the support to consider the force balance of the inner support and the retaining structure under the asymmetric load,but it did not explicitly give the calculation method of the.In actual engineering,it depends on experience to choose may result in an unreasonable design.In this paper,combined with the support structure design theory and the displacement of retaining wall and earth pressure deformation law,the reasonable assumptions of deformation and force of soil and retaining structure under small deformation conditions are proposed,earth pressure calculation method which retaining wall relative to soil movement under asymmetric load is proposed;theoretical derivation of deformation and force of soil and support structure under asymmetric load,and the calculation method of referred to as value method was proposed as well,combined with the actual engineering,the value method is compared with the actual monitoring data.The calculation results show that the value method calculates the stiffness coefficient of the inner support elastic fulcrum according to the engineering practice,and can avoid the subjectivity of value and the resulting error.
作者
余保汶
李泽江
傅旭东
YU Baowen;LI Zejiang;FU Xudong(School of Civil Engineering,Wuhan University,Wuhan 430072,China)
出处
《粉煤灰综合利用》
CAS
2020年第2期41-45,共5页
Fly Ash Comprehensive Utilization
基金
国家自然科学基金项目(51978540)。
关键词
基坑支护
内支撑
非对称荷载
支撑不动点调整系数
土压力
foundation pit support
inner support
asymmetric load
support fixed point adjustment coefficient
earth pressure
