[1]王宇,黄德贵.高压旋喷桩单桩施工挤土效应数值模拟分析[J].高速铁路技术,2024,15(03):73-80.[doi:10.12098/j.issn.1674-8247.2024.03.014]
　WANG Yu,HUANG Degui.A Numerical Simulation Analysis of Soil Displacement Effects Induced by Construction of Single High-pressure Jet Grouted Pile[J].HIGH SPEED RAILWAY TECHNOLOGY,2024,15(03):73-80.[doi:10.12098/j.issn.1674-8247.2024.03.014]
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高压旋喷桩单桩施工挤土效应数值模拟分析()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
15卷
期数:
2024年03期
页码:
73-80
栏目:
研究创新
出版日期:
2024-06-20

文章信息/Info

Title:
A Numerical Simulation Analysis of Soil Displacement Effects Induced by Construction of Single High-pressure Jet Grouted Pile
文章编号:
1674-8247（2024）03-0073-08
作者:
王宇1; 黄德贵2
1.成都华丰工程勘察设计有限公司， 成都610041;2.西南交通大学， 成都610031
Author(s):
WANG Yu1; HUANG Degui2
1.Chengdu Huafeng Engineering Survey and Design Co. ，Ltd. ，Chengdu 610041 ，China;2.Southwest Jiaotong University ，Chengdu 610031 ，China
关键词:
高压旋喷桩; 挤土效应; 现场试验; 数值模拟
Keywords:
high-pressure jet grouted pile; soil displacement effects; field tests; numerical simulation
分类号:
U213.1；TU473.1
DOI:
10.12098/j.issn.1674-8247.2024.03.014
文献标志码:
A
摘要:
为研究高压旋喷桩加固区域近接既有高速铁路时，高压旋喷桩施工造成周围土体变形的规律，依托杭甬高速铁路198号桥墩所在断面，结合现场试验，采用有限差分软件FLAC3D模拟高压旋喷桩施工，探究高压旋喷桩单桩注浆压力、桩长和土体模量变化对挤土效应范围的影响。结果表明：（1）现场试验中单桩挤土效应影响距离约16.5m，占桩长的82.5％；（2）高压旋喷桩单桩施工挤土效应影响距离与注浆压力、桩长呈正相关；（3）单桩注浆压力增大，桩长增长，挤土效应影响距离增大；（4）桩周土体模量增大，高压旋喷桩的挤土效应影响距离减小；（5）高压旋喷桩近接既有高速铁路施工时，需确定正确施工参数并进行变形监测，必要时采取变形控制措施。
Abstract:
To investigate the pattern of soil deformation around high-pressure jet grouted piles when they are installed in close proximity to an existing high-speed railway，this study focused on the cross-section where Pier No. 198 of Hangzhou-Ningbo High-speed Railway is located. Combining field tests with numerical simulations using the finite difference software FLAC3D，it examined the influence of grouting pressure，pile length，and soil modulus on the extent of soil displacement effects caused by a single high-pressure jet grouting pile. Findings reveal that：（1）In field tests，the soil displacement effect induced by single pile extended up to approximately 16. 5 m，accounting for 82. 5％ of the pile length. （2）There exists a positive correlation between the extent of soil displacement effects induced by a single high-pressure jet grouted pile and both grouting pressure and pile length.（3）As the grouting pressure increases and the pile length grows，the affected distance of the soil displacement effect expands. （4）An increase in the modulus of soil surrounding the pile leads to a decrease in the extent of the soil displacement effect associated with high-pressure jet grouting. （5）During the construction of high-pressure jet grouted piles in close proximity to existing high-speed railways，it is essential to establish appropriate construction parameters and conduct deformation monitoring，implementing deformation control measures if necessary.

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相似文献/References:

[1]罗军,王炳龙,陕耀,等.邻近高速铁路单根高压旋喷桩施工对周围土体的变形影响[J].高速铁路技术,2023,14(01):13.[doi:10.12098/j.issn.1674-8247.2023.01.003]
　LUO Jun,WANG Binglong,SHAN Yao,et al.Deformation Impact of Construction of a Single High-pressure Jet Grouting Pile in the Vicinity of a High-speed Railway on Surrounding Soil Mass[J].HIGH SPEED RAILWAY TECHNOLOGY,2023,14(03):13.[doi:10.12098/j.issn.1674-8247.2023.01.003]

备注/Memo

备注/Memo:
收稿日期：2023-05-31
作者简介：王宇（1990-），男，工程师。
更新日期/Last Update: 2024-06-30