基坑工程设计中相邻建筑荷载的作用

基坑工程是指为进行建(构)筑物基础与地下室的施工所开挖的地面以下空间。为保证基坑施工及主体地下结构的安全和周围环境不受损害,需对基坑进行支护,在基坑工程设计中,作用在支护结构上的荷载除土压力、水压力、施工载荷、地面超载、结构自重、支撑(锚杆)预压力及温度变化等外,还有周围建筑物引起的侧向压力。通过理论分析提出刚性桩(CFG)复合地基基础附加压力对基坑支护结构产生侧向压力的计算方法,该计算方法既不同于深基础(通常指桩基础)计算方法,也不同于天然地基浅基础计算方法。对以后类似工程设计具有一定的理论指导和借鉴意义。

LOADING ACTIONS OF ADJACENT BUILDINGS IN DESIGN OF EXCAVATION PROJECT

Foundation ditch engineering is the space below ground for constructing the building foundation and underground chamber.In order to ensure the safety of the foundation ditch construction and main underground structure and avoid damage to the surrounding environment,the foundation ditch needs to be supported.In the design of the foundation ditch engineering,the loads on the support structureare lateral pressure caused by the surrounding building,as well as earth pressure,water pressure,construction load,excess load at surface,dead load,pre-pressure of the support(anchor rod)and temperature change.This paper puts forward a method for calculating lateral pressure of the foundation ditch support structure caused by the additional pressure of compound foundation of rigid piles(CFG),which is not the same as that of the deep foundation(usually dowel foundation),and not as the one of shallow foundation of the natural foundation.Which provides a theoretic guide and experience to the design of similar engineerings.