Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum Preloading
The application of vacuum preloading to prefabricated vertical drains (PVDs) with different lengths is widely used in practical engineering to investigate their consolidation at the same depths of even and multilayer subsoils from the seabed. In a laboratory, model experiment was conducted using eve...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/7428595 |
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| author | Chenhui Lou Junfeng Ni Jingchun Chai Hongtao Fu Xiuqing Hu Donghai Xu Youchang Lyu Zhi Guan Zhengde Xia Qiang Ye |
| author_facet | Chenhui Lou Junfeng Ni Jingchun Chai Hongtao Fu Xiuqing Hu Donghai Xu Youchang Lyu Zhi Guan Zhengde Xia Qiang Ye |
| author_sort | Chenhui Lou |
| collection | DOAJ |
| description | The application of vacuum preloading to prefabricated vertical drains (PVDs) with different lengths is widely used in practical engineering to investigate their consolidation at the same depths of even and multilayer subsoils from the seabed. In a laboratory, model experiment was conducted using even subsoil and embedded PVDs with lengths of 0.6 and 1.2 m. The obtained results showed that in the even subsoil, the 1.2 m PVDs maintained a higher vacuum pressure in the shallow layer and demonstrated better consolidation behavior as compared to those of the 0.6 m PVDs. In the upper subsoil layer, the average vane shear strengths of these two systems increased to 18.2 and 22.6 kPa, respectively. The degree of consolidation of the upper subsoil layers in the two model experiments calculated from the pore water pressures under boundary drainage conditions were 51% and 68%, respectively. For practical verification purposes, similar experiments were conducted for multilayer subsoil by inserting PVDs with lengths of 6 and 15 m into different test sites. As a result, the vane shear strengths of the upper 6 m subsoil layers increased to 26.3 and 33 kPa, while the degree of consolidation were 72.1% and 80.9%, respectively, although some irregularities were observed at different depths. |
| format | Article |
| id | doaj-art-27ffd9d4b56843e9b3e4f090778ffcc1 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-27ffd9d4b56843e9b3e4f090778ffcc12025-02-03T01:10:46ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/74285957428595Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum PreloadingChenhui Lou0Junfeng Ni1Jingchun Chai2Hongtao Fu3Xiuqing Hu4Donghai Xu5Youchang Lyu6Zhi Guan7Zhengde Xia8Qiang Ye9College of Architecture and Civil Engineering, Wenzhou University, Chashan University Town, Wenzhou 325035, ChinaDepartment of Civil Engineering and Architecture, Saga University, Saga, JapanDepartment of Civil Engineering and Architecture, Saga University, Saga, JapanCollege of Architecture and Civil Engineering, Wenzhou University, Chashan University Town, Wenzhou 325035, ChinaCollege of Architecture and Civil Engineering, Wenzhou University, Chashan University Town, Wenzhou 325035, ChinaWenzhou Longda Reclamation Development and Construction Co., Ltd., Wenzhou, Zhejiang 325035, ChinaWenzhou Oufei Development and Construction Investment Group Co., Ltd., Wenzhou, Zhejiang 325035, ChinaWenzhou Longda Reclamation Development and Construction Co., Ltd., Wenzhou, Zhejiang 325035, ChinaCCCC Shanghai Dredging Co., Ltd., Huangpu District, Shanghai, ChinaCollege of Architecture and Civil Engineering, Wenzhou University, Chashan University Town, Wenzhou 325035, ChinaThe application of vacuum preloading to prefabricated vertical drains (PVDs) with different lengths is widely used in practical engineering to investigate their consolidation at the same depths of even and multilayer subsoils from the seabed. In a laboratory, model experiment was conducted using even subsoil and embedded PVDs with lengths of 0.6 and 1.2 m. The obtained results showed that in the even subsoil, the 1.2 m PVDs maintained a higher vacuum pressure in the shallow layer and demonstrated better consolidation behavior as compared to those of the 0.6 m PVDs. In the upper subsoil layer, the average vane shear strengths of these two systems increased to 18.2 and 22.6 kPa, respectively. The degree of consolidation of the upper subsoil layers in the two model experiments calculated from the pore water pressures under boundary drainage conditions were 51% and 68%, respectively. For practical verification purposes, similar experiments were conducted for multilayer subsoil by inserting PVDs with lengths of 6 and 15 m into different test sites. As a result, the vane shear strengths of the upper 6 m subsoil layers increased to 26.3 and 33 kPa, while the degree of consolidation were 72.1% and 80.9%, respectively, although some irregularities were observed at different depths.http://dx.doi.org/10.1155/2019/7428595 |
| spellingShingle | Chenhui Lou Junfeng Ni Jingchun Chai Hongtao Fu Xiuqing Hu Donghai Xu Youchang Lyu Zhi Guan Zhengde Xia Qiang Ye Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum Preloading Advances in Civil Engineering |
| title | Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum Preloading |
| title_full | Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum Preloading |
| title_fullStr | Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum Preloading |
| title_full_unstemmed | Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum Preloading |
| title_short | Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum Preloading |
| title_sort | consolidation effect of prefabricated vertical drains with different lengths for soft subsoil under vacuum preloading |
| url | http://dx.doi.org/10.1155/2019/7428595 |
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