沙漠地区干沙坑开挖施工方法
[摘要]宁东－山东±660kV直流输电示范工程在宁夏段有多基塔位位于毛乌素沙漠中，整个基坑内全部为细干沙，流动性极强，基坑开挖时边挖边坍，基坑不易成型。施工中，我们根据干沙的特点，认真总结以往工程施工经验，制定了详细可行的施工方案，保证了沙漠地区基础施工的安全和质量。
[关键词] 干沙流动性围砌基坑成型
[abstract] There are multi-Base Dawei located in Maowusu desert in Ningxia section in Ningxia-Shandong ±660 kV HVDC demonstration project, the inside of the foundation pit is full of all fine dry sand, liquidity is extremely strong, when the foundation pit excavation and dig side, foundation pit is not easy to shape. Under the construction, we, according to the characteristics of the dry sand, seriously summarized with former engineering construction experience, worked out a detailed feasible construction plan, and made ensure the desert areas of foundation construction safety and quality.
[key Words] dry sand; liquidity; around the foundation pit; build by laying bricks or stones forming
毛乌素沙漠是中国大沙区之一，正在建设中的宁东－山东±660kV直流输电示范工程在宁夏段有多基塔位位于此沙漠中，而其中坑深最深的为5.4m，最浅的坑深为4.5m，加上干沙具有极强的流动性，使基坑开挖成型非常困难。
下面以本段工程中沙漠区段最深的一基基础施工为例，论述基坑开挖的施工方法。
基础参数
桩号：G1008；
基础型号：RX50533；
基础坑深：5400mm（注：基础底板下面设100mmC10混凝土垫层）；
底板断面：5000mm×5000mm；
沙漠地区干沙坑开挖施工方法
[摘要]宁东－山东±660kV直流输电示范工程在宁夏段有多基塔位位于毛乌素沙漠中，整个基坑内全部为细干沙，流动性极强，基坑开挖时边挖边坍，基坑不易成型。施工中，我们根据干沙的特点，认真总结以往工程施工经验，制定了详细可行的施工方案，保证了沙漠地区基础施工的安全和质量。
[关键词] 干沙流动性围砌基坑成型
[abstract] There are multi-Base Dawei located in Maowusu desert in Ningxia section in Ningxia-Shandong ±660 kV HVDC demonstration project, the inside of the foundation pit is full of all fine dry sand, liquidity is extremely strong, when the foundation pit excavation and dig side, foundation pit is not easy to shape. Under the construction, we, according to the characteristics of the dry sand, seriously summarized with former engineering construction experience, worked out a detailed feasible construction plan, and made ensure the desert areas of foundation construction safety and quality.
[key Words] dry sand; liquidity; around the foundation pit; build by laying bricks or stones forming
毛乌素沙漠是中国大沙区之一，正在建设中的宁东－山东±660kV直流输电示范工程在宁夏段有多基塔位位于此沙漠中，而其中坑深最深的为5.4m，最浅的坑深为4.5m，加上干沙具有极强的流动性，使基坑开挖成型非常困难。
下面以本段工程中沙漠区段最深的一基基础施工为例，论述基坑开挖的施工方法。
基础参数
桩号：G1008；
基础型号：RX50533；
基础坑深：5400mm（注：基础底板下面设100mmC10混凝土垫层）；
底板断面：5000mm×5000mm；