深基坑地基加固变形计算与效果评价

基坑内地基加固是深基坑环境保护的重要措施之一。地基加固方法众多、加固方式不一，不同加固方案的加固效果和经济价值也各不相同。文中提出了利用考虑地基土水平基床系数修正的杆系有限元法进行加固后深基坑变形计算。针对一典型地层的15m挖深的基坑，计算和分析了不同加固方案和施工参数下加固效果和加固费用。提出了必须根据基坑保护等级和施工周期进行加固设计的思想。

Deformation Calculation and Effect Evaluation of Ground Reinforcement in Deep Excavation

The ground reinforcement is an important measure on the protection of surroundings in deep excavation. There are many ground reinforcement methods. Every method has its own reinforcement effect and economical value. This paper puts forward a deformation calculation method based on the modified horizontal coefficient of subgrade reaction. Takeing a foundation pit of 15m deep as an example,this paper discusses the reinforcement effects and expense in different schemes and construction parameters,and advises a new thought of reinforcement design based on the protection grade and the construction period in deep excavation.