沿海地区淤泥质土层深基坑支护优化设计

Optimization Design of Deep Foundation Pit Support in Muddy Soil Layer in Coastal Area

随着我国基建工程大幅度回暖,地下空间尤其是深基坑工程占比保持高速增长趋势。结合连镇(连云港至镇江)铁路灌云综合客运枢纽项目地下车库工程,其位于沿海连云港地区,以淤泥地质为主,且不可避免地在雨季完成全部支护开挖的困难条件下,就深基坑支护加固优化设计主要思路、实施组合方案及主要技术要点等进行深入研究,作为连镇铁路同步开通的配套工程,较原设计工期提前11个月投产使用,经济性和可推广性俱佳,为类似地质条件下的工程提供可借鉴经验。

With the substantial recovery of China’s infrastructure projects,the proportion of underground space,especially deep foundation pit projects,maintains a high-speed growth trend.Combined with the underground garage project of Guanyun comprehensive passenger transport hub project of Lianyungang town(Lianyungang-Zhenjiang)railway,this paper studies and analyzes the main ideas,specific combination schemes and main technical points of deep foundation pit support reinforcement optimization design under the difficult conditions that the coastal Lianyungang area is dominated by silt geology and it is inevitable that all support excavation must be completed in the rainy season.As a supporting project for the simultaneous opening of Lianyungang-Zhenjiang High-speed Railway,it is put into operation 11 months ahead of the original design period,with good economy and popularization,which can provide reference experience for projects under similar geological conditions.