深厚覆盖层上水电站厂房位移计算和控制  

Displacement Calculation and Control of Hydropower House on Deep Overburden

作　　者：王龙[1] 马震岳[1] 

机构地区：[1]大连理工大学建设工程学部水利工程学院,辽宁大连116024

出　　处：《水电能源科学》2013年第11期132-135,共4页Water Resources and Power

摘　　要：以西藏某水电站工程为例,针对深覆盖层软土地基上水电站厂房的沉降变形问题进行了有限元模拟和计算,利用邓肯—张双曲线模型中的卸载再加载模量代替原始地基变形模量与摩尔—库仑等面积圆屈服准则的组合作为地基本构模型进行计算,并采用面—面接触单位模拟桩与土体的摩擦接触,通过对不同施工措施下的结果比较和分析,提出了在整个厂房底部设置摩擦桩并进行较大范围的固结灌浆,可控制部分厂房沉降和蓄水引起的回弹变形。Taking a hydropower station project in Tibet for an example, this paper applied the FEM to simulate and analyze the settlement deformation of hydropower house on deep overburden. It presents a calculation method by using foundation constitutive model, which combines unloading and reloading modulus of Duncan-Chang hyperbolic model, in- stead of original deformation modulus with Mohr-Coulomb equivalent area circle yield criterion. The surface-to-surface contact model is used to simulate frictional contact between piles and soil. Through comparison and analysis of the results under different construction measures, a conclusion can be drew that setting up friction piles at the bottom of hydropower house and carrying out consolidation grouting in a wide range can control partial settlement and rebound deformation caused by water storage.

关 键 词：水电站厂房 深厚覆盖层 邓肯-张双曲线模型 卸载再加载模量 沉降控制 

分 类 号：TV223.2[水利工程—水工结构工程] TV731.1