Test on Compaction Reinforcement Effect of Sand
In fracture or compaction grouting projects of sand layer, there exist many compacted sand regions on both sides of grout veins or around grout bulbs. It has an important effect on the final reinforcement effect of the sand layer that how much performance of the sand layer is improved after being co...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/3685619 |
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| author | Lianzhen Zhang Qingsong Zhang Zhipeng Li Hongbo Wang |
| author_facet | Lianzhen Zhang Qingsong Zhang Zhipeng Li Hongbo Wang |
| author_sort | Lianzhen Zhang |
| collection | DOAJ |
| description | In fracture or compaction grouting projects of sand layer, there exist many compacted sand regions on both sides of grout veins or around grout bulbs. It has an important effect on the final reinforcement effect of the sand layer that how much performance of the sand layer is improved after being compacted. Compression modulus, cohesion, and permeability coefficient are selected to be the performance indexes of the compaction reinforcement effect of sand. The relationship between the performance properties of sand and grouting pressure has been tested and analyzed. And influences of clay content and initial water ratio of sand on the compaction reinforcement effect have been studied. Results show that compaction can effectively improve the mechanical properties and impermeability properties of sand. Compression modulus of sand increases by 2∼18 times. The cohesion of sand increases from the scope of 9.4∼26 kPa to the scope of 40∼113.6 kPa. The permeability coefficient of sand decreases from the scope of 1.0 × 10−2∼ 8.33 × 10−4 cm/s to the scope of 2.19 × 10−4∼2.77 × 10−9 cm/s. When the clay content of sand is smaller than about 20%, sand cannot be reinforced effectively by compaction. Cohesion cannot be improved significantly and the permeability coefficient cannot be reduced markedly. A high initial water ratio of sand is beneficial to improve the compression modulus of compacted sand and goes against the improvement of cohesion of compacted sand. In addition, the initial water ratio has little effect on the permeability coefficient of compacted sand. In the end, fitting formulas have been developed to quantitatively describe the compaction reinforcement effect of sand by different grouting pressures. |
| format | Article |
| id | doaj-art-f526f9a6c8f04ea7aff1a4f46225fded |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-f526f9a6c8f04ea7aff1a4f46225fded2025-02-03T06:47:00ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/36856193685619Test on Compaction Reinforcement Effect of SandLianzhen Zhang0Qingsong Zhang1Zhipeng Li2Hongbo Wang3College of Pipeline and Civil Engineering, China University of Petroleum, 66# Changjiang West Road, Qingdao, ChinaGeotechnical and Structural Engineering Research Center, Shandong University, 17923# Jingshi Road, Jinan, ChinaSchool of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention, Shandong University of Science and Technology, Qingdao, ChinaIn fracture or compaction grouting projects of sand layer, there exist many compacted sand regions on both sides of grout veins or around grout bulbs. It has an important effect on the final reinforcement effect of the sand layer that how much performance of the sand layer is improved after being compacted. Compression modulus, cohesion, and permeability coefficient are selected to be the performance indexes of the compaction reinforcement effect of sand. The relationship between the performance properties of sand and grouting pressure has been tested and analyzed. And influences of clay content and initial water ratio of sand on the compaction reinforcement effect have been studied. Results show that compaction can effectively improve the mechanical properties and impermeability properties of sand. Compression modulus of sand increases by 2∼18 times. The cohesion of sand increases from the scope of 9.4∼26 kPa to the scope of 40∼113.6 kPa. The permeability coefficient of sand decreases from the scope of 1.0 × 10−2∼ 8.33 × 10−4 cm/s to the scope of 2.19 × 10−4∼2.77 × 10−9 cm/s. When the clay content of sand is smaller than about 20%, sand cannot be reinforced effectively by compaction. Cohesion cannot be improved significantly and the permeability coefficient cannot be reduced markedly. A high initial water ratio of sand is beneficial to improve the compression modulus of compacted sand and goes against the improvement of cohesion of compacted sand. In addition, the initial water ratio has little effect on the permeability coefficient of compacted sand. In the end, fitting formulas have been developed to quantitatively describe the compaction reinforcement effect of sand by different grouting pressures.http://dx.doi.org/10.1155/2020/3685619 |
| spellingShingle | Lianzhen Zhang Qingsong Zhang Zhipeng Li Hongbo Wang Test on Compaction Reinforcement Effect of Sand Advances in Materials Science and Engineering |
| title | Test on Compaction Reinforcement Effect of Sand |
| title_full | Test on Compaction Reinforcement Effect of Sand |
| title_fullStr | Test on Compaction Reinforcement Effect of Sand |
| title_full_unstemmed | Test on Compaction Reinforcement Effect of Sand |
| title_short | Test on Compaction Reinforcement Effect of Sand |
| title_sort | test on compaction reinforcement effect of sand |
| url | http://dx.doi.org/10.1155/2020/3685619 |
| work_keys_str_mv | AT lianzhenzhang testoncompactionreinforcementeffectofsand AT qingsongzhang testoncompactionreinforcementeffectofsand AT zhipengli testoncompactionreinforcementeffectofsand AT hongbowang testoncompactionreinforcementeffectofsand |