基于多源监测的深基坑组合支护结构时变演化与环境影响分析

汪子奇; 蔡记华; 徐俊

doi:10.20265/j.cnki.issn.1007-2993.2025-0214

基于多源监测的深基坑组合支护结构时变演化与环境影响分析

doi: 10.20265/j.cnki.issn.1007-2993.2025-0214

汪子奇^1,,
蔡记华^1, ,,
徐俊²

1.
中国地质大学（武汉）工程学院，湖北武汉　430074
2.
湖北省城市地质工程院，湖北武汉　430050

基金项目: 湖北省自然科学基金项目（2023AFD214）；湖北省技术创新专项重大项目（2018AAA035）

详细信息

作者简介:
汪子奇，男，1992年生，博士研究生，从事基坑工程、地下工程等方面的研究工作。E-mail：geoziqiwang@cug.edu.cn

通讯作者:
蔡记华，男，1978年生，博士，教授，博士生导师，从事基础工程、钻探工程等领域的教学与研究工作。E-mail：caijh@cug.edu.cn

中图分类号: TU473
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- 文章访问数: 10
- HTML全文浏览量: 2
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2025-05-16
- 修回日期: 2025-09-28
- 录用日期: 2025-11-11
- 网络出版日期: 2026-04-09
- 刊出日期: 2026-04-09

Analysis of time-varying evolution and environmental impact on combined deep excavation support structures based on multi-source monitoring

WANG Ziqi^1
,,
CAI Jihua^{1
, ,},
XU Jun²

1.
Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, Hubei, China
2.
Hubei Institute of Urban Geological Engineering, Wuhan 430050, Hubei, China

摘要

摘要: 临江深基坑工程面临软土、高承压水以及周边敏感环境等多重挑战，因此深入研究其变形规律至关重要。目前针对动态施工活动与基坑变形响应之间的内在关联及演化规律的探讨尚不充分。以武汉某临江深基坑工程为例，通过将施工节点与基坑周边及深层水平位移、支撑轴力及周边沉降等多源监测数据进行时序关联分析，并结合数值模拟方法加以验证，揭示了动态施工过程中通过调控支护结构等效刚度直接影响基坑变形大小与形态的内在机理。研究成果可为临江深基坑工程的支护设计优化与施工风险动态预警提供技术依据。
- 深基坑 /
- 多源监测 /
- 组合支护结构 /
- 变形控制 /
- 时变演化 /
- 环境影响
Abstract: Deep foundation pit projects near rivers are confronted with multiple challenges such as soft soil, high confined water, and sensitive environments. Therefore, it is of great significance to study their deformation laws. Currently, the exploration of the internal relationship and evolutionary laws between dynamic construction activities and foundation pit deformation responses is still insufficient. Taking a deep foundation pit project near the Yangtze River in Wuhan as an example, this study conducts a time-varying correlation analysis between construction nodes and multi-source monitoring data, including the horizontal displacements around and at depth of the foundation pit, the axial forces of supports, and the surrounding settlements. The analysis results are verified by numerical simulation methods. It is revealed that the dynamic construction process directly affects the magnitude and shape of foundation pit deformation by adjusting the equivalent stiffness of the supporting structure. The research results can provide a technical basis for the optimization of the supporting design of deep foundation pits near rivers and the dynamic early warning of construction risks.
- deep foundation pit /
- multi-source monitoring /
- composite support structure /
- deformation control /
- time-varying evolution /
- environmental impact

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图 1 基坑周边环境图

Figure 1. Surrounding environment map of foundation pit

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图 2 典型地层结构剖面图

Figure 2. Typical stratigraphic structure profile

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图 3 围护桩+水平撑支护结构剖面图

Figure 3. Profile of retaining pile + horizontal brace support structure

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图 4 围护桩+斜撑支护结构剖面图

Figure 4. Profile of retaining pile + inclined brace support structure

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图 5 型钢水泥土搅拌墙+锚索支护结构剖面图

Figure 5. Profile of steel-reinforced cement-soil mixing wall + anchor cable support structure

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图 6 双排桩支护结构剖面图

Figure 6. Profile of double-row pile support structure

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图 7 基坑开挖分区及监测点布置图

Figure 7. Profile of foundation pit excavation zoning and monitoring point layout

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图 8 施工节点−监测响应图

Figure 8. Construction node-monitoring response diagram

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图 9 计算模型图

Figure 9. Computational model diagram

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图 10 有限元支护结构图

Figure 10. Finite element support structure diagram

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图 11 基坑开挖至基底周边变形云图

Figure 11. Deformation contour map of surrounding area after foundation pit excavation to the bottom

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图 12 围护桩+水平撑压顶梁水平位移

Figure 12. Horizontal displacement of capping beam in retaining pile + horizontal brace support system

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图 13 围护桩+水平撑深层水平位移

Figure 13. Deep horizontal displacement of retaining pile + horizontal brace support system

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图 14 围护桩+斜撑压顶梁水平位移

Figure 14. Horizontal displacement of capping beam in retaining pile + inclined brace support system

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图 15 围护桩+斜撑深层水平位移

Figure 15. Deep horizontal displacement of retaining pile + inclined brace support system

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图 16 斜撑轴力监测

Figure 16. Axial force monitoring of inclined braces

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图 17 型钢水泥土搅拌墙+锚索压顶梁水平位移

Figure 17. Horizontal displacement of capping beam in steel-reinforced cement-soil mixing wall + anchor cable support system

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图 18 型钢水泥土搅拌墙+锚索深层水平位移

Figure 18. Deep horizontal displacement of steel-reinforced cement-soil mixing wall + anchor cable support system

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图 19 双排桩压顶梁水平位移

Figure 19. Horizontal displacement of capping beam in double-row pile support system

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图 20 双排桩深层水平位移

Figure 20. Deep horizontal displacement of double-row pile support system

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图 21 基坑周边地表沉降位移

Figure 21. Ground surface settlement and displacement around the foundation pit

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表 1 地层物理力学参数

Table 1. Table of physico-mechanical parameters of strata

地层编号及名称	重度 /（kN∙m⁻³）	压缩模量 /MPa	黏聚力 /kPa	内摩擦角/(°)
(1)杂填土	20.0	3.0	8	18
(2)粉质黏土夹粉土	18.3	4.0	15	9
(3)粉土、粉砂、粉质黏土互层	18.0	7.0	10	16
(4-1)粉细砂	19.1	19.0	0	33
(4-2)粉细砂	19.3	24.0	0	35
(4-3)粉细砂	19.4	29.0	0	36
(5)泥岩	25.0	44.0	38	16

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表 2 支护桩等刚度代换计算表

Table 2. Calculation table for equivalent stiffness substitution of supporting piles

序号	围护桩/mm	等效地连墙厚度/m
1	ϕ1000@1300	0.8
2	ϕ1200@1500	1.0
3	ϕ1000@1200	0.8
4	型钢水泥土搅拌墙	0.82

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表 3 结构有限元参数

Table 3. Structural finite element parameters

围护类型	截面尺寸	弹性模量/MPa	泊松比
冠梁	1.2 m×0.8 m	30000	0.2
支撑梁	0.8 m×0.8 m	30000	0.2
立柱桩	ϕ800 mm	30000	0.2
钢格构	440×440×10 mm	210000	0.2
钢支撑	ϕ609×16 mm	210000	0.2

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