摘要
同步注浆是盾构施工中的重要工序,进行不当会产生如地表沉陷等严重后果,故需要对同步注浆对周围土体应力和位移的影响进行研究。通过数值模拟研究不同注浆压力、盾构掘进速度、地层条件下盾尾同步注浆施工对周围土体产生的影响,总结地表沉降和隧道周围土体的应力、位移的变化规律。结果表明,注浆压力在盾尾离开的初期快速消散并区域稳定;地表沉降随盾构掘进表现出逐渐增大的趋势,同步注浆对地表沉降的发展起一定的抑制作用;同步注浆对隧道周围土体的应力和位移均有影响。
Simultaneous grouting is an important process in shield tunneling construction,and improper implementation can lead to serious consequences such as surface subsidence.Therefore,it is necessary to study the impact of simultaneous grouting on the stress and displacement of the surrounding soil.This article studies the impact of simultaneous grouting construction at the shield tail on the surrounding soil under different grouting pressures,shield tunneling speeds,and geological conditions through numerical simulation,and summarizes the changes in surface settlement and stress and displacement of the soil around the tunnel.The results indicate that the grouting pressure rapidly dissipates and stabilizes in the early stage of shield tail departure;The surface settlement gradually increases with shield tunneling,and simultaneous grouting has a certain inhibitory effect on the development of surface settlement;Simultaneous grouting has an impact on the stress and displacement of the soil around the tunnel.
作者
董宏振
Dong Hongzhen(Shandong Jiaotong University,Jinan Shandong 250357,China)
出处
《山西建筑》
2023年第21期151-154,167,共5页
Shanxi Architecture
关键词
盾构
同步注浆
土体扰动
S hield tunneling
simultaneous grouting
soil disturbance
