Experiment Investigation on Stress Characteristics of Grouting Microsteel Pipe Piles with Cement-Soil Wall
Microsteel pipe piles are widely used in excavation support owing to their excellent bearing capacity, flexural rigidity, construction speed, and adaptability. In this study based on a project in soil-rock layers in Qingdao, China, a new type of support combining microsteel pipe piles mounted in cem...
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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/10.1155/2020/9704589 |
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| author | Shujuan Yang Mingyi Zhang Xiaoyu Bai Xueying Liu Chen Zheng |
| author_facet | Shujuan Yang Mingyi Zhang Xiaoyu Bai Xueying Liu Chen Zheng |
| author_sort | Shujuan Yang |
| collection | DOAJ |
| description | Microsteel pipe piles are widely used in excavation support owing to their excellent bearing capacity, flexural rigidity, construction speed, and adaptability. In this study based on a project in soil-rock layers in Qingdao, China, a new type of support combining microsteel pipe piles mounted in cement-soil piles and anchors was adopted and studied. The inner force change laws and bearing capacity of microsteel pipe piles were discussed through in situ stress measurement and laboratory antibending tests on three microsteel pipe piles. It was found that the bending moment of the piles gradually increased with the foundation excavation and maximized at the pile head. The bending moment was larger at the upper and smaller at the lower part along the depth direction, indicating it is reasonable to design and calculate microsteel pipe piles by the pile-anchor system. The variation law of the foundation pit displacement with the excavation depth was monitored. The horizontal displacement of the foundation pit is the maximum at the base top, which is 6.5 mm. The flexural strength of the miniature steel tube pile after grouting is 40% higher than that of the miniature steel tube pile without grouting. It was indicated that the grouting microsteel pipe piles could be implanted in cement-soil piles, which improved the flexural rigidity of cement-soil piles and limited the deformation of foundation pits. This study provides reference for the design and construction of soil-rock foundation pit supporting projects. At the same time, it provides reference for the application of miniature steel pipe piles in other fields. |
| format | Article |
| id | doaj-art-6ae36e165125431489dc52f6a5b7acf5 |
| 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-6ae36e165125431489dc52f6a5b7acf52025-02-03T01:04:37ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/97045899704589Experiment Investigation on Stress Characteristics of Grouting Microsteel Pipe Piles with Cement-Soil WallShujuan Yang0Mingyi Zhang1Xiaoyu Bai2Xueying Liu3Chen Zheng4Department of Civil Engineering, Qingdao University of Technological, Qingdao, Shandong 266033, ChinaDepartment of Civil Engineering, Qingdao University of Technological, Qingdao, Shandong 266033, ChinaDepartment of Civil Engineering, Qingdao University of Technological, Qingdao, Shandong 266033, ChinaDepartment of Civil Engineering, Qingdao University of Technological, Qingdao, Shandong 266033, ChinaDepartment of Civil Engineering, Qingdao University of Technological, Qingdao, Shandong 266033, ChinaMicrosteel pipe piles are widely used in excavation support owing to their excellent bearing capacity, flexural rigidity, construction speed, and adaptability. In this study based on a project in soil-rock layers in Qingdao, China, a new type of support combining microsteel pipe piles mounted in cement-soil piles and anchors was adopted and studied. The inner force change laws and bearing capacity of microsteel pipe piles were discussed through in situ stress measurement and laboratory antibending tests on three microsteel pipe piles. It was found that the bending moment of the piles gradually increased with the foundation excavation and maximized at the pile head. The bending moment was larger at the upper and smaller at the lower part along the depth direction, indicating it is reasonable to design and calculate microsteel pipe piles by the pile-anchor system. The variation law of the foundation pit displacement with the excavation depth was monitored. The horizontal displacement of the foundation pit is the maximum at the base top, which is 6.5 mm. The flexural strength of the miniature steel tube pile after grouting is 40% higher than that of the miniature steel tube pile without grouting. It was indicated that the grouting microsteel pipe piles could be implanted in cement-soil piles, which improved the flexural rigidity of cement-soil piles and limited the deformation of foundation pits. This study provides reference for the design and construction of soil-rock foundation pit supporting projects. At the same time, it provides reference for the application of miniature steel pipe piles in other fields.http://dx.doi.org/10.1155/2020/9704589 |
| spellingShingle | Shujuan Yang Mingyi Zhang Xiaoyu Bai Xueying Liu Chen Zheng Experiment Investigation on Stress Characteristics of Grouting Microsteel Pipe Piles with Cement-Soil Wall Advances in Materials Science and Engineering |
| title | Experiment Investigation on Stress Characteristics of Grouting Microsteel Pipe Piles with Cement-Soil Wall |
| title_full | Experiment Investigation on Stress Characteristics of Grouting Microsteel Pipe Piles with Cement-Soil Wall |
| title_fullStr | Experiment Investigation on Stress Characteristics of Grouting Microsteel Pipe Piles with Cement-Soil Wall |
| title_full_unstemmed | Experiment Investigation on Stress Characteristics of Grouting Microsteel Pipe Piles with Cement-Soil Wall |
| title_short | Experiment Investigation on Stress Characteristics of Grouting Microsteel Pipe Piles with Cement-Soil Wall |
| title_sort | experiment investigation on stress characteristics of grouting microsteel pipe piles with cement soil wall |
| url | http://dx.doi.org/10.1155/2020/9704589 |
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