CAJ | 학술논문

在城市建设中越来越多的大面积深基坑采用中心岛顺作、周边预留土台逆作的开挖支护方式.该法不仅节约工程造价,而且节省大量工期,但目前仍缺乏简单、合理的设计计算方法.基于Rankine土压力理论,采用图解法得到中心岛被动土压力的分布模式,该土压力分布在单一土质条件下随埋深呈现为3段折线.根据上述土压力分布和基坑工程手册[1]有关悬臂结构的设计思路,提出中心岛法围护结构的设计计算方法,并提供一个算例.经算例验证该法简单实用,便于工程师使用.
재성시건설중월래월다적대면적심기갱채용중심도순작、주변예류토태역작적개알지호방식.해법불부절약공정조개,이차절성대량공기,단목전잉결핍간단、합리적설계계산방법.기우Rankine토압력이론,채용도해법득도중심도피동토압력적분포모식,해토압력분포재단일토질조건하수매심정현위3단절선.근거상술토압력분포화기갱공정수책[1]유관현비결구적설계사로,제출중심도법위호결구적설계계산방법,병제공일개산례.경산례험증해법간단실용,편우공정사사용.
For the urban construction, the method of“Central island by bottom-up and peripheral part by top-down”has been used more and more in large deep excavation of foundation pit. In the help of this method, construction cost and project time can be saved a lot. However, there is a lack of simple and reasonable calculation method for it. Central island distribution pattern of passive earth pressure are put forward in this article which is based on and Rankine's earth pressure theory. In the condition of single soil, the pattern was described in 3 polygonal lines with the corresponding depth. The practical method for central island method of retaining structures is proposed according to the above-mentioned distribution pattern and the design method of cantilever structure from excavation engineering handbook, and a case was given. It is proved by the example that the method was simple and practical, and convenient for using to the engineer.