石家庄地铁洞桩法车站施工地表沉降分析

Analysis of Ground Settlement Data of Shijiazhuang Subway Tunnel Pile Method Construction

结合石家庄地铁洞桩法大戏院站及长安公园站实施情况,通过对监测数据进行分析研究洞桩法施工各阶段沉降规律和特点,地表沉降曲线呈单凹槽形式,沉降最大点位于横断面中心,沉降槽形态及深度受群洞效应影响。地表沉降在不同施工过程具有明显的阶段性变化,其中地表沉降值以导洞开挖阶段最为明显,其次是扣拱施工阶段,因此这两个施工阶段是控制洞桩法地表沉降的关键和重点。研究其施工实际监测数据,为保证工程顺利进行起到一定保障作用。为在类似地质条件下进行施工积累相关经验和提供参考数据。

Based on the progress status of the Shijiazhuang subway tunnel pile,Large Theater station and Chang’an Park station,the monitoring data is analyzed to study the settlement law and characteristics of each stage of the pile construction,the surface settlement curve is in the form of single groove,and the maximum settlement point is located.At the center of the cross section,the shape and depth of the settlement trough are affected by the group hole effect.Surface settlement has obvious phase changes in different construction processes.The surface settlement value is most obvious in the excavation stage,followed by the arching construction stage.Therefore,these two construction stages are the key and key points for controlling the surface settlement of the pile method.Studying the actual monitoring data of the construction will play a certain guarantee role in ensuring the smooth progress of the project.They accumulate relevant experience and provide reference data for construction under similar geological conditions.