http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Dongxing Ren (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Dongxing Ren,Chao Kang,Huanhuan Liu,Yin Li,Jilin Wang 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.6
A large-scale foundation pit, 25,720 m2 (127 m × 213 m), was excavated to a depth of approximately 20 m by the central-island technique from 2012 to 2013 in Chengdu, China. This paper aims to comprehensively study the deformation behaviours of the foundation pit during excavation and investigate the primary factors affecting the deformation behaviour of the foundation pit. The deformation characteristics monitored during excavation included 1) horizontal column movement, 2) vertical column movement, 3) lateral column deflection, 4) internal stress in the column, 5) axial force in anchor cables, 6) ground settlement, and 7) artesian water levels. To further explore the pit sizes on the excavation behaviour, field data from another ten excavations in Chengdu were also included in the analysis. The results showed the maximum deflection of the column was mostly detected at the top of the column. The vertical column movement, δcu, undulates during excavation. After the desired depth was reached, the increase in the vertical column movement was negligible. The internal force in the anchor cable varied between 20 − 30 kN during the excavation and between 30 − 70 kN when the expected depth was excavated. A relatively small ground settlement in the studied excavation sites was observed due to the mudstone at the bottom of the excavation and the installation of anchor cables. In addition, it was noticed that the aspect ratio and excavation depth have a significant effect on the maximum deflection at the top of the column. This paper enriches the database and improves the understanding of the deformation behaviour of large-scale foundation pits during excavation.
-
Tao Peng,Dongxing Ren,Chao Kang,Huanhuan Liu,Peng Xue,Hai Huang 대한토목학회 2024 KSCE Journal of Civil Engineering Vol.28 No.5
This research aims to comprehensively study the deformation characteristics of an excavation pit of 7,600 m2 (117 m long, 65 m wide and 20.8 m deep) in soft clay in Shanghai, China. The deformation characteristics of the mixing pile in both the vertical and lateral directions, ground surface movement, and surface displacement in the adjacent tunnels were comprehensively investigated. The results indicated that the maximum lateral deflection was approximately 85 mmat the end of the excavation and that the maximum lateral displacement, hm, was in the range between 0.12%He and 0.41%He. The factor of safety of the excavation was approximately 1.6, which was larger than that of most reported sites in Shanghai. The relationship between heaving and excavation depth was strong between 0.0047%He and 0.056%He, and a relatively large settlement was observed at a distance of approximately 0.2He – 0.3He. The tunnel surface of the eastbound line deformed upward and inward with a maximum horizontal convergence of 4 mm. A multilayer regression model was also validated, showing a maximum discrepancy of 26.5 mm. This research provides a valuable historical case for the documentation of the deformation characteristics of excavation pits close to existing foundation pits and tunnels.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
