碾压沙漠砂贫混凝土治理变电站地基塌陷  

Foundation Collapse of Crushed Desert Sand-poor Concrete

作　　者：王宏涛 杨宝平 杜伊 康亚明 WANG Hong-tao;YANG Bao-ping;DU Yi;KANG Ya-ming(Ningxia Ultra High Voltage Power Engineering Co.,Ltd,Yinchuan 750001,Ningxia,China;Ningxia Yueyuan Engineering Co.Ltd,Guyuan 750000,Ningxia,China;School of Electromechanical Eng.,North Minzu University,Yinchuan 750021,Ningxia,China)

机构地区：[1]宁夏超高压电力工程有限公司,宁夏银川750001 [2]宁夏跃元工程有限公司,宁夏固原750000 [3]北方民族大学机电工程学院,宁夏银川750021

出　　处：《铜业工程》2021年第4期29-32,共4页Copper Engineering

基　　金：北方民族大学校企联合横向项目(2102000247)。

摘　　要：贺兰山750kV变电站是宁夏750kV主网架结构组成之一,也是宁夏大坝电厂电能输送的桥梁。在其建成运行后的若干年中,出现了一些常见的变电站地基病害,其原因并非前期设计或施工问题,而是传统填方法无法夯实,且传统的回填土抗冲刷能力差,导致后期出现了不均匀沉降和因冲刷而诱发的塌陷,经过现场勘查和论证分析,提出了对不均匀沉降用变电站附近的沙漠砂制备的贫混凝土进行回填,对于沟槽和管线附近的塌陷,用自密实沙漠砂贫混凝土进行自密实灌浆处理的措施,现场试验取得了成功。Helanshan 750 kV substation is one of the main grid structure of Ningxia 750 kV and the bridge of power transmission in Ningxia Dam Power Plant.In the years after its completion and operation,some common substation foundation diseases have appeared.The reason is not the early design or construction problem,but the traditional filling method can not be tamped,and the traditional backfill has poor scour resistance,which leads to uneven settlement and erosion induced collapse.

关 键 词：碾压沙漠砂贫混凝土 自密实 冲刷塌陷 不均匀沉降 软岩硬土 

分 类 号：TU451[建筑科学—岩土工程]