A Case Study of Combined Drainage Consolidation-Preloading Methods for a Highway Subgrade on Peat Soils
A highway project of up to 100 km/h is currently being constructed between Colombo and Katunayake International Airport across a Sri Lankan muskeg area. At this site, peat deposit was initially 0.8∼15.3 m thick and was underlain by sand, clay, or gneiss. The ground improvement methods adopted in the...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8816619 |
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| author | Yue Gui Shengjun Liu Xiaqiang Qin Jianfei Wang |
| author_facet | Yue Gui Shengjun Liu Xiaqiang Qin Jianfei Wang |
| author_sort | Yue Gui |
| collection | DOAJ |
| description | A highway project of up to 100 km/h is currently being constructed between Colombo and Katunayake International Airport across a Sri Lankan muskeg area. At this site, peat deposit was initially 0.8∼15.3 m thick and was underlain by sand, clay, or gneiss. The ground improvement methods adopted in the project were combined drainage consolidation-preloading methods, pipe pile foundation, and geogrids. This paper provides a detailed insight into the implementation of combined drainage consolidation-preloading methods used in the project, including sand pile, gravel pile, and plastic drainage plate as the prefabricated vertical drains. Periodical field-level observations were taken during the ten years, including the construction and postconstruction periods. The results show that peat soils’ consolidation coefficient has been increased several times to tens of times due to ground improvement. After removing the temporary surcharge, the highway embankments did not heave and was followed by long-term settlements totaling 1.3∼7.4 cm over the following seven years of observations. Analysis of the settlement records shows that combined drainage consolidation-preloading methods have helped accelerate drainage consolidation and reduce postconstruction settlement. |
| format | Article |
| id | doaj-art-169f15f838d64164b475191463d4606d |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-169f15f838d64164b475191463d4606d2025-02-03T01:00:38ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88166198816619A Case Study of Combined Drainage Consolidation-Preloading Methods for a Highway Subgrade on Peat SoilsYue Gui0Shengjun Liu1Xiaqiang Qin2Jianfei Wang3Department of Civil Engineering, Kunming University of Science and Technology, Kunming 650504, Yunnan, ChinaDepartment of Civil Engineering, Kunming University of Science and Technology, Kunming 650504, Yunnan, ChinaChina MCC20 Group Corp. Ltd, Shanghai 201900, ChinaYunnan Construction and Investment Holding Group Co., Ltd, Kunming 650504, Yunnan, ChinaA highway project of up to 100 km/h is currently being constructed between Colombo and Katunayake International Airport across a Sri Lankan muskeg area. At this site, peat deposit was initially 0.8∼15.3 m thick and was underlain by sand, clay, or gneiss. The ground improvement methods adopted in the project were combined drainage consolidation-preloading methods, pipe pile foundation, and geogrids. This paper provides a detailed insight into the implementation of combined drainage consolidation-preloading methods used in the project, including sand pile, gravel pile, and plastic drainage plate as the prefabricated vertical drains. Periodical field-level observations were taken during the ten years, including the construction and postconstruction periods. The results show that peat soils’ consolidation coefficient has been increased several times to tens of times due to ground improvement. After removing the temporary surcharge, the highway embankments did not heave and was followed by long-term settlements totaling 1.3∼7.4 cm over the following seven years of observations. Analysis of the settlement records shows that combined drainage consolidation-preloading methods have helped accelerate drainage consolidation and reduce postconstruction settlement.http://dx.doi.org/10.1155/2020/8816619 |
| spellingShingle | Yue Gui Shengjun Liu Xiaqiang Qin Jianfei Wang A Case Study of Combined Drainage Consolidation-Preloading Methods for a Highway Subgrade on Peat Soils Advances in Civil Engineering |
| title | A Case Study of Combined Drainage Consolidation-Preloading Methods for a Highway Subgrade on Peat Soils |
| title_full | A Case Study of Combined Drainage Consolidation-Preloading Methods for a Highway Subgrade on Peat Soils |
| title_fullStr | A Case Study of Combined Drainage Consolidation-Preloading Methods for a Highway Subgrade on Peat Soils |
| title_full_unstemmed | A Case Study of Combined Drainage Consolidation-Preloading Methods for a Highway Subgrade on Peat Soils |
| title_short | A Case Study of Combined Drainage Consolidation-Preloading Methods for a Highway Subgrade on Peat Soils |
| title_sort | case study of combined drainage consolidation preloading methods for a highway subgrade on peat soils |
| url | http://dx.doi.org/10.1155/2020/8816619 |
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