砂层地质条件下新建渠道开挖保护措施  

Protection Measures for Excavation of New Channel under Sandy Geological Condition

作　　者：李成伟 杨东启 叶磊 罗正峰 顾玉龙 LI Cheng-wei;YANG Dong-qi;YE Lei;LUO Zheng-feng;GU Yu-long(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2022年第9期88-90,共3页Yunnan Water Power

摘　　要：在白云机场三期扩建场外排涝渠道改造建设施工过程中,由于渠道坡顶存在建筑物及构筑物干扰,同时受不确定因素及复杂地质环境影响,边坡坍塌情况常有发生。以广州白云机场三期扩建工程场外排渠改道工程为例,针对施工场地出现的砂层地质进行优化设计,重点针对西部排水河航油管段砂层地下连续墙施工,采用高压旋喷桩帷幕与水泥搅拌桩帷幕两种措施防砂层塌孔、砂层边坡开挖采用钢板桩加挡土板支护与钢板桩支护两种措施防止边坡坍塌,将原设计施工方案与优化后的施工方案效果进行对比分析,总结相关施工经验。During reconstruction and construction of off-site drainage channel in Phase III expansion of Baiyun Airport,slope collapse often occurs due to interference of buildings and structures on the top of channel slope,as well as uncertain factors and complex geological environment.This paper takes that as the background and optimizes the design of sand geology in the construction site.High-pressure rotary jet grouting pile curtain and cement mixing pile curtain are used in the construction of underground diaphragm wall in sand layer of oil pipeline section of Drainage River in Western China to prevent collapse of sand layer and steel sheet pile plus retaining plate support and steel sheet pile support are used in excavation of sand slope.In this paper,the effects of original design construction scheme and optimized construction scheme are compared and analyzed,and relevant construction experience is summarized.

关 键 词：砂质地层 解决措施 渠道开挖 连续墙施工 

分 类 号：TV512[水利工程—水利水电工程]