高铁深基坑混合式围堰受力分析

STRESS ANALYSIS OF MIXED COFFERDAM FOR DEEP FOUNDATION PIT OF HIGH-SPEED RAIL

近年来,随着中国铁路建设的不断发展,丘陵地区的客运线路数量逐渐增加。文中结合昌赣客运专线CGZQ-8标二部分中深基坑混合式围堰施工实践,采用MIDAS软件建立有限元模型,对于最不利的工况条件,进行围堰结构的受力分析。结果表明,在施工过程中最不利的工况条件下,钢板桩和围堰结构的内部支撑系统均符合要求。

In recent years,with the continuous development of China's railway construction,the number of passenger lines across the hilly area has gradually increased.This paper combines the construction practice of the mixed foundation cofferdam of the middle and deep foundation pit of the second part of the CGZQ-8 standard of Chang-Gan passenger dedicated line,establishes the finite element model by MIDAS software to carry out the force analysis of the cofferdam structure under the most unfavorable working conditions.The results show that under the most unfavorable working conditions of the construction process,the steel sheet piles and the internal support system of the cofferdam structure both meet the requirements.