An experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill area
The studies of foundation treatment methods are carried out for the special and complex foundation in the fill, saturated silty fine sand and silt in the coastal backfill area of the coastal zone of the Shandong Peninsula. Based on the economical and efficient dynamic compaction method, the concept...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Hydrogeology & Engineering Geology
2022-01-01
|
| Series: | Shuiwen dizhi gongcheng dizhi |
| Subjects: | |
| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104076 |
| _version_ | 1811170247035584512 |
|---|---|
| author | Junjian ZHANG Peng LI Kunyu YIN Yulei LUO Man GUO |
| author_facet | Junjian ZHANG Peng LI Kunyu YIN Yulei LUO Man GUO |
| author_sort | Junjian ZHANG |
| collection | DOAJ |
| description | The studies of foundation treatment methods are carried out for the special and complex foundation in the fill, saturated silty fine sand and silt in the coastal backfill area of the coastal zone of the Shandong Peninsula. Based on the economical and efficient dynamic compaction method, the concept of integrated combined drainage is put forward. The relay drainage system of the shallow and deep vertical drainage channels and their relay horizontal drainage channels are designed, and field tests are undertaken. The monitoring data show that under the dynamic compaction load, the relay drainage system can coordinate drainage as a whole, which can quickly discharge the groundwater to dissipate the excess pore water pressure. The rise of groundwater level and dissipation of pore water pressure caused by dynamic compaction can be basically eliminated in about 7 hours. With continuous precipitation, the surface settlement is 0.7%～2.0% of the thickness of the upper soil mass. Under the dynamic load of dynamic compaction, the surface soil is compressed to 8.7%～10.9% of the thickness of the upper soil. The soil settlement is about 5 ‰ and 3 ‰ of the soil thickness at the buried depth of 3～7 m, and 2 ‰ of the soil thickness is at the buried depth of 7～10 m. The test data show that in the effective depth of dynamic compaction, the effect of foundation treatment is obvious, the engineering properties and the degree of consolidation of foundation are improved. The surface bearing capacity and deformation modulus meet the design requirements, the average bearing capacity of silt below 4 m is slightly lower than the design requirements, and the average degree of consolidation of mucky soil is 77%. The monitoring data of one month after tamping shows that the surface subsidence is within 25 mm, which tends to be stable, the layered settlement and pore water pressure are stable and slightly decreased. |
| first_indexed | 2024-04-10T16:54:57Z |
| format | Article |
| id | doaj.art-20b6b11665fe4aa7b9ffb6d969420a34 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:54:57Z |
| publishDate | 2022-01-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-20b6b11665fe4aa7b9ffb6d969420a342023-02-07T08:18:32ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652022-01-0149111712510.16030/j.cnki.issn.1000-3665.202104076202104076An experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill areaJunjian ZHANG0Peng LI1Kunyu YIN2Yulei LUO3Man GUO4China Geotechnical Co. Ltd., Hangzhou, Zhejiang 311401, ChinaQingdao Surveying & Mapping Institute, Qingdao, Shandong 266032, ChinaQingdao Geotechnical Foundation Engineering Company, Qingdao, Shandong 266032, ChinaNo. 2 Engineering Co. Ltd. of CCCC First Harbor Engineering Co. Ltd., Qingdao, Shandong 266071, ChinaQingdao Binhai Investigation and Surveying Co. Ltd., Qingdao, Shandong 266071, ChinaThe studies of foundation treatment methods are carried out for the special and complex foundation in the fill, saturated silty fine sand and silt in the coastal backfill area of the coastal zone of the Shandong Peninsula. Based on the economical and efficient dynamic compaction method, the concept of integrated combined drainage is put forward. The relay drainage system of the shallow and deep vertical drainage channels and their relay horizontal drainage channels are designed, and field tests are undertaken. The monitoring data show that under the dynamic compaction load, the relay drainage system can coordinate drainage as a whole, which can quickly discharge the groundwater to dissipate the excess pore water pressure. The rise of groundwater level and dissipation of pore water pressure caused by dynamic compaction can be basically eliminated in about 7 hours. With continuous precipitation, the surface settlement is 0.7%～2.0% of the thickness of the upper soil mass. Under the dynamic load of dynamic compaction, the surface soil is compressed to 8.7%～10.9% of the thickness of the upper soil. The soil settlement is about 5 ‰ and 3 ‰ of the soil thickness at the buried depth of 3～7 m, and 2 ‰ of the soil thickness is at the buried depth of 7～10 m. The test data show that in the effective depth of dynamic compaction, the effect of foundation treatment is obvious, the engineering properties and the degree of consolidation of foundation are improved. The surface bearing capacity and deformation modulus meet the design requirements, the average bearing capacity of silt below 4 m is slightly lower than the design requirements, and the average degree of consolidation of mucky soil is 77%. The monitoring data of one month after tamping shows that the surface subsidence is within 25 mm, which tends to be stable, the layered settlement and pore water pressure are stable and slightly decreased.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104076coastal backfill areacomplex foundationrelay drainagedynamic compactionwell point precipitationplastic drainage plate |
| spellingShingle | Junjian ZHANG Peng LI Kunyu YIN Yulei LUO Man GUO An experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill area Shuiwen dizhi gongcheng dizhi coastal backfill area complex foundation relay drainage dynamic compaction well point precipitation plastic drainage plate |
| title | An experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill area |
| title_full | An experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill area |
| title_fullStr | An experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill area |
| title_full_unstemmed | An experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill area |
| title_short | An experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill area |
| title_sort | experimental study of the dynamic compaction method based on relay drainage in foundation treatment of the coastal backfill area |
| topic | coastal backfill area complex foundation relay drainage dynamic compaction well point precipitation plastic drainage plate |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104076 |
| work_keys_str_mv | AT junjianzhang anexperimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT pengli anexperimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT kunyuyin anexperimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT yuleiluo anexperimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT manguo anexperimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT junjianzhang experimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT pengli experimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT kunyuyin experimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT yuleiluo experimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea AT manguo experimentalstudyofthedynamiccompactionmethodbasedonrelaydrainageinfoundationtreatmentofthecoastalbackfillarea |