郑西客运专线灰土桩桩网结构加固湿陷性黄土地基设计初探

研究目的:提出用灰土桩桩网结构加固郑西客运专线湿陷性黄土地基的设计思路和计算方法,并以郑西客运专线为背景,选取典型断面进行设计计算。研究结果:采用灰土桩桩网结构加固湿陷性黄土地基,承载力和工后变形沉降均能满足设计要求,且只要单桩承载力满足容许承载力要求,灰土桩桩网结构的承载力不是设计的控制因素,应该用沉降来控制设计。

Primary Exploration on the Design of Reinforcing Collapsible Loess Foundation of Zhengzhou-Xi'an Railway Passenger Dedicated Line with Lime-soil Pile-Net Structure

Research purposes:The design thoughts and calculation method are presented for reinforcing the collapsible loess foundation of Zhengzhou-Xi'an Railway Passenger Dedicated Line with Lime-soil Pile-Net Structure and taking Zhengzhou-Xi'an Railway Passenger Dedicated Line as object,the calculation of typical section is made for the design. Research results:The bearing capacity and post-construction settlement of the foundation meet the design requirements while adopting lime-soil pile-net structure to reinforce collapsible loess foundation.The bearing capacity of lime-soil pile-net structure is not the control factor of design so long as the bearing capacity of single pile meets the allowable beating requirement,so the attention should be paid to the settlement of foundation in design.