钉型搅拌桩加固铁路软土路基分析

Analysis on Strengthening of Railway Subgrade in Soft Soil Areas with Nail Type Mixing Piles

基于Boussinesq理论研究了钉型搅拌桩在软土地区对地基沉降的控制效果,应用ABAQUS有限元软件对地基位移进行了数值计算,同时在某工程试验段进行现场测试试验。为比较钉型搅拌桩与其他桩型加固效果的优劣,同等条件下增加了水泥搅拌桩、双向水泥搅拌桩和水泥砂浆桩的横向对比。结果表明:钉型搅拌桩相对于其他桩型可以有效控制工后沉降,单桩承载力高,加固效果好,适合在软土地区使用。

Based on the Boussinesq theory,the control of foundation settlement by nail type mixing piles in soft soil areas was studied.The displacement of the foundation was numerically calculated using ABAQUS finite element software,and testing experiments were conducted on a certain engineering site test section.In order to compare the advantages and disadvantages of the reinforcement effect between nail type mixing piles and other pile types,horizontal comparisons of cement mixing piles,bi-directional cement mixing piles,and cement mortar piles were added under the same conditions.The results show that compared to other pile types,nail type mixing piles can effectively control post construction settlement,have high single pile bearing capacity,good reinforcement effect,and are suitable for use in soft soil areas.