%0 Journal Article
%T 高架桥桥基与深基坑近距离施工相互影响的加固参数分析<br>Interaction between Overpass Bridge Foundation and Deep Foundation Pit in Adjacent Construction
%A 李桂颖
%A 周超
%A 丁春林
%A 朱海星
%J Hans Journal of Civil Engineering
%P 875-887
%@ 2326-3466
%D 2022
%I Hans Publishing
%R 10.12677/HJCE.2022.117095
%X 为减小高架桥与地下车站深基坑近距离施工的相互影响，实际工程中经常需要对桥基周围土体进行加固。本文通过Midas GTS NX有限元软件，对桩基周围土体采用不同的加固土性和不同的加固范围进行数值模拟，分析了加固参数对高架桥桥基和深基坑近距离施工的影响规律。结果表明，在提高加固土体土性参数1倍以前，每提高土性参数50%，基坑地表沉降减小约5%；超过临界值后，继续提高土性参数对基坑变形控制效果提升并不明显。当加固范围扩大至横向距离桥台14 m，纵向距离桥台12 m以内时，扩大加固范围可以有效减小基坑地表沉降；超过该范围后，加固效果几乎不变；土性加固参数的提高对土体有挤压作用，地下连续墙侧向变形会有少许增加，但并不明显；桥基纵向沉降呈现出两边小、中间大的趋势，改善土体的加固参数可以一定程度减小桥基的沉降。<br />
In order to reduce the interaction between overpass foundation and deep foundation pit in adjacent construction, a common solution is to reinforce the surrounding soil of bridge foundation in practicle projects. This paper carried out a numerical simulation method with Midas GTS NX by adapting the soil around the pile foundation with different soil properties and different reinforcement ranges, so as to find out the influence pattern of reinforcement parameters in interaction between bridge foundation and foundation pit. The results show that, before increasing the soil property parameters of the reinforced soil by 1 time, for every 50% increase of the soil property parameters, the surface settlement of the foundation pit will be reduced by about 5%; after the critical value is exceeded, the control effect of the foundation pit deformation is not significantly improved by continuing to increase the soil property parameters. When the reinforcement range is expanded to 14 m laterally from the bridge abutment, and within 12 m longitudinally from the bridge abutment, expanding the reinforcement range can effectively reduce the surface settlement of the foundation pit. After this range is exceeded, the reinforcement effect is almost unchanged; the lateral deformation of the underground diaphragm wall will increase slightly, but it is not obvious; the longitudinal settlement of the bridge foundation shows a trend of small on both sides and large in the middle. Improving the reinforcement parameters of the soil can reduce the settlement of the bridge foundation to a certain extent.
%K 高架桥桥基，深基坑，加固参数，相互影响，数值模拟<br>Overpass Foundation
%K Deep Foundation Pit
%K Reinforcement Parameters
%K Interaction
%K Numerical Simulation
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=54136