Construction impact of a new mined tunnel undercrossing an overlying stormwater box culvert and an underlying existing tunnel

LUO Yunhua; ZHOU Xiangguo; LI Tanglei; ZHANG Yongxing; ZHANG Xuemin

doi:10.20265/j.cnki.issn.1007-2993.2025-0276

Volume 40 Issue 5

Oct. 2026

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LUO Yunhua, ZHOU Xiangguo, LI Tanglei, ZHANG Yongxing, ZHANG Xuemin. Construction impact of a new mined tunnel undercrossing an overlying stormwater box culvert and an underlying existing tunnel[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(5): 711-716. doi: 10.20265/j.cnki.issn.1007-2993.2025-0276

Citation:

LUO Yunhua, ZHOU Xiangguo, LI Tanglei, ZHANG Yongxing, ZHANG Xuemin. Construction impact of a new mined tunnel undercrossing an overlying stormwater box culvert and an underlying existing tunnel[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(5): 711-716. doi: 10.20265/j.cnki.issn.1007-2993.2025-0276

Citation:

LUO Yunhua, ZHOU Xiangguo, LI Tanglei, ZHANG Yongxing, ZHANG Xuemin. Construction impact of a new mined tunnel undercrossing an overlying stormwater box culvert and an underlying existing tunnel[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(5): 711-716. doi: 10.20265/j.cnki.issn.1007-2993.2025-0276

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Construction impact of a new mined tunnel undercrossing an overlying stormwater box culvert and an underlying existing tunnel

doi: 10.20265/j.cnki.issn.1007-2993.2025-0276

1.
Guangdong Tianxin Electric Power Engineering Testing Co., Ltd., Guangzhou 510000, Guangdong, China
2.
Nanjing Forestry University, Nanjing 210037, Jiangsu, China
3.
Central South University, Changsha 410018, Hunan, China

Received Date: 2025-06-20
Accepted Date: 2025-08-25
Rev Recd Date: 2025-08-19

Available Online: 2026-10-08

Publish Date: 2026-10-08

Abstract

Abstract

New underground projects in close proximity to existing underground structures are becoming increasingly common. Strictly controlling the impact of the construction of such new underground works on existing structures is the key to the success of the project. Taking the construction of a new transfer passage tunnel at a subway station, which underpasses an existing tunnel and passes beneath an overlying stormwater box culvert, as a case study, this paper investigates the influence laws of the Center Diaphragm (CD) method on surface settlement and the deformation of both the new tunnel and existing structures. The study is based on field monitoring data and three-dimensional finite element analysis. The results indicate that adopting the CD method—characterized by layered, block, zoned, and segmented excavation—combined with advance horizontal jet grouting for ground improvement, can effectively control ground settlement and structural deformation. Furthermore, the excavation footage in the CD method significantly affects the deformation of the existing tunnel and the stormwater box culvert; therefore, the excavation footage must be strictly controlled during construction to minimize impacts on existing structures. The findings of this study can provide valuable references for the construction of similar underground projects.
- newly built mined tunnel,
- undercrossing construction,
- overlying stormwater box culvert,
- underlying existing tunnel,
- Center Diaphragm (CD) method,
- disturbance control

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References(16)

References

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Construction impact of a new mined tunnel undercrossing an overlying stormwater box culvert and an underlying existing tunnel

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Construction impact of a new mined tunnel undercrossing an overlying stormwater box culvert and an underlying existing tunnel

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