摘要
在坡地、邻近道路的大面积低洼农田或沟塘等地势不平区域进行基坑工程建设,将面临基坑四周自然地坪标高差异大、基坑开挖深浅不一等不同于常规城区内地下空间开发的状况。当限于经济性要求或环境要求等条件不适宜设置锚杆、双排桩等常规无内支撑的围护结构时,因地制宜的采用“中心岛”结合斜抛撑的总体方案型式,可有效的解决周边不等高情况下单侧独立支护的问题,从而避免大面积满堂设置内支撑,经济合理且工效较高。同时,利用主体结构作为支撑体系的一部分,总体刚度比较大,能够更好的控制基坑变形,利于保护环境。
For large areas depressed farmlands,ditches and other uneven terrain with side slopes and adjacent roads,deep excavation projects in these areas will mainly face the situations which differ from conventional deep excavations in urban areas.These differences are in natural ground floor elevations surrounding the excavated area and the variation of excavation depths.When it is not eligible to install ground anchors for the supporting structure,double-row piles and other conventional supporting structures without internal support with the limitation by the cost and/or environmental constraints,the concern of the independent supporting structure for the side excavation with different excavation depths could be effectively resolved by using site specific conditions,which is a combination of the"central island"(central structure blocks)and diagonal support members.This arrangement could avoid fully installing the internal support in a large area,thus is cost effective and efficiency.Further,using the main structure as part of the support system is reliable in the overall stiffness,can better control the deformation of the supporting structure and protect the environment.
作者
戴斌
谈永卫
赵昇
DAI Bin;TAN Yongwei;ZAHO Sheng(Shanghai Underground Space&Engineering Design Institute,East China Architecture Design&Research Institute Co.Ltd.,Shanghai 200011;Shanghai Engineering Research Center for Safety Control for Facilities Adjacent to Deep Excavations,Shanghai 200011;Jiangxi Shenjiang Investment Co.Ltd.,Shanghai Greenland Group,Nanchang 330000)
出处
《土工基础》
2021年第3期281-285,296,共6页
Soil Engineering and Foundation
关键词
低洼区
不等高
“中心岛”
深基坑
边坡
Depressed Area
Uneven Excavation Depth
Central Structure Blocks
Deep Excavation
Side Slope
作者简介
戴斌(1978-),男,高级工程师,硕士,研究方向为基坑工程及地基处理。
