Deformation Characteristics and Optimization Design for Large-Scale Deep and Circular Foundation Pit Partitioned Excavation in a Complex Environment
With the rapid development of urban rail transit, the impact of the construction of large-scale deep and circular foundation pits (LDCFPs) on the surrounding environment has become increasingly prominent; however, there is no definite standard for the design theory and construction method of the ret...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-08-01
|
| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/12/9/1292 |
| _version_ | 1827662757757976576 |
|---|---|
| author | Hai Shi Zhilei Jia Tao Wang Zhiqiang Cheng De Zhang Mingzhou Bai Kun Yu |
| author_facet | Hai Shi Zhilei Jia Tao Wang Zhiqiang Cheng De Zhang Mingzhou Bai Kun Yu |
| author_sort | Hai Shi |
| collection | DOAJ |
| description | With the rapid development of urban rail transit, the impact of the construction of large-scale deep and circular foundation pits (LDCFPs) on the surrounding environment has become increasingly prominent; however, there is no definite standard for the design theory and construction method of the retaining structure of LDCFPs; therefore, the such standard needs further research and exploration. The paper is based on the LDCFP engineering of a subway station in Wuhan, China. Two partitioned excavation methods (step-by-step and synchronous excavation) of LDCFP were discussed by numerical simulation; the deformation characteristics of the soil around the foundation pit, the lateral deformation of the retaining structure in each partitioned district, and the distribution of the supporting axial force were analyzed; the deformation law of LDCFP was revealed; and the safe and economic excavation method was determined. The field monitoring test was carried out to reveal the deformation characteristics and stress evolution behavior for the supporting structure of the LDCFP in the subway station. It was concluded that the construction method of synchronous partitioned excavation in the same layer is more conducive to controlling the overall deformation, with the deformation of the circular retaining structure being uniform and the “vault effect” of the circular retaining structure having a certain constraint on the deformation of the foundation pit. The research results can provide guidance for the design and construction of supporting engineering and similar engineering. |
| first_indexed | 2024-03-10T00:32:26Z |
| format | Article |
| id | doaj.art-5a41798c3641481da0b99eaa4c17863d |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T00:32:26Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-5a41798c3641481da0b99eaa4c17863d2023-11-23T15:22:05ZengMDPI AGBuildings2075-53092022-08-01129129210.3390/buildings12091292Deformation Characteristics and Optimization Design for Large-Scale Deep and Circular Foundation Pit Partitioned Excavation in a Complex EnvironmentHai Shi0Zhilei Jia1Tao Wang2Zhiqiang Cheng3De Zhang4Mingzhou Bai5Kun Yu6School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaShanghai Road and Bridge Group Co., Ltd., Shanghai 200433, ChinaShanghai Road and Bridge Group Co., Ltd., Shanghai 200433, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaWith the rapid development of urban rail transit, the impact of the construction of large-scale deep and circular foundation pits (LDCFPs) on the surrounding environment has become increasingly prominent; however, there is no definite standard for the design theory and construction method of the retaining structure of LDCFPs; therefore, the such standard needs further research and exploration. The paper is based on the LDCFP engineering of a subway station in Wuhan, China. Two partitioned excavation methods (step-by-step and synchronous excavation) of LDCFP were discussed by numerical simulation; the deformation characteristics of the soil around the foundation pit, the lateral deformation of the retaining structure in each partitioned district, and the distribution of the supporting axial force were analyzed; the deformation law of LDCFP was revealed; and the safe and economic excavation method was determined. The field monitoring test was carried out to reveal the deformation characteristics and stress evolution behavior for the supporting structure of the LDCFP in the subway station. It was concluded that the construction method of synchronous partitioned excavation in the same layer is more conducive to controlling the overall deformation, with the deformation of the circular retaining structure being uniform and the “vault effect” of the circular retaining structure having a certain constraint on the deformation of the foundation pit. The research results can provide guidance for the design and construction of supporting engineering and similar engineering.https://www.mdpi.com/2075-5309/12/9/1292LDCFPsdeformation characteristicspartitioned excavationcontrol measuresoptimization design |
| spellingShingle | Hai Shi Zhilei Jia Tao Wang Zhiqiang Cheng De Zhang Mingzhou Bai Kun Yu Deformation Characteristics and Optimization Design for Large-Scale Deep and Circular Foundation Pit Partitioned Excavation in a Complex Environment Buildings LDCFPs deformation characteristics partitioned excavation control measures optimization design |
| title | Deformation Characteristics and Optimization Design for Large-Scale Deep and Circular Foundation Pit Partitioned Excavation in a Complex Environment |
| title_full | Deformation Characteristics and Optimization Design for Large-Scale Deep and Circular Foundation Pit Partitioned Excavation in a Complex Environment |
| title_fullStr | Deformation Characteristics and Optimization Design for Large-Scale Deep and Circular Foundation Pit Partitioned Excavation in a Complex Environment |
| title_full_unstemmed | Deformation Characteristics and Optimization Design for Large-Scale Deep and Circular Foundation Pit Partitioned Excavation in a Complex Environment |
| title_short | Deformation Characteristics and Optimization Design for Large-Scale Deep and Circular Foundation Pit Partitioned Excavation in a Complex Environment |
| title_sort | deformation characteristics and optimization design for large scale deep and circular foundation pit partitioned excavation in a complex environment |
| topic | LDCFPs deformation characteristics partitioned excavation control measures optimization design |
| url | https://www.mdpi.com/2075-5309/12/9/1292 |
| work_keys_str_mv | AT haishi deformationcharacteristicsandoptimizationdesignforlargescaledeepandcircularfoundationpitpartitionedexcavationinacomplexenvironment AT zhileijia deformationcharacteristicsandoptimizationdesignforlargescaledeepandcircularfoundationpitpartitionedexcavationinacomplexenvironment AT taowang deformationcharacteristicsandoptimizationdesignforlargescaledeepandcircularfoundationpitpartitionedexcavationinacomplexenvironment AT zhiqiangcheng deformationcharacteristicsandoptimizationdesignforlargescaledeepandcircularfoundationpitpartitionedexcavationinacomplexenvironment AT dezhang deformationcharacteristicsandoptimizationdesignforlargescaledeepandcircularfoundationpitpartitionedexcavationinacomplexenvironment AT mingzhoubai deformationcharacteristicsandoptimizationdesignforlargescaledeepandcircularfoundationpitpartitionedexcavationinacomplexenvironment AT kunyu deformationcharacteristicsandoptimizationdesignforlargescaledeepandcircularfoundationpitpartitionedexcavationinacomplexenvironment |