深基坑支护技术的现状及其应用前景

Status and Application Foreground of Deep Foundation Pit Support Technology

在用地愈发紧张的密集城市中心,改造开发大型地下空间已成为一种必然。地下空间开发规模越来越大,开挖深度也越来越深,对深基坑支护技术的需求日益旺盛。该文介绍了深基坑支护技术的应用现状、发展水平,重点论述了当前基坑支护的型钢水泥土搅拌墙技术、旋喷搅拌加劲桩支护技术、预应力鱼腹梁钢结构支撑技术的主要特征、应用情况。结合地下空间开发的需求和地层特点,指出了我国新型深基坑支护技术的市场占有率和应用前景。

The reconstruction and development of the large underground space have become a necessity in the more limited land of city center.The underground space is more and more developed and the excavation depth is deeper and deeper to make the demand of the deep pit support technology increasingly urgent.The article introduces the application status and development level of deep pit support technology,and focuses discussion on the main characters and application conditions of section steel cement soil agitating wall technique,jet grouting mixing reinforced pile support technique,prestressed fish-belly beam steel structural supporting technique for the present pit support.According to the demand of underground space development and the stratum characteristics, the article points out the market share and application foreground of the new deep foundation pit support technique in China.