Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive Soil
When the pipe jacking technology is applied in expansive formation, the soil around the pipe will easily absorb water from the slurry and expand to wrap up the pipe, producing an excessive pipe jacking force. A water-based slurry formula suitable for pipe jacking in expansive soil layer was proposed...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/9040471 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832550913893466112 |
|---|---|
| author | Xian Yang Yang Liu Chao Yang |
| author_facet | Xian Yang Yang Liu Chao Yang |
| author_sort | Xian Yang |
| collection | DOAJ |
| description | When the pipe jacking technology is applied in expansive formation, the soil around the pipe will easily absorb water from the slurry and expand to wrap up the pipe, producing an excessive pipe jacking force. A water-based slurry formula suitable for pipe jacking in expansive soil layer was proposed in this paper. Firstly, the key design points of pipe jacking slurry in expansive soil were put forward. Secondly, plant glue, potassium humate, Na-CMC, and graphite powder were chosen as treating agents to improve the slurry performance. The effect of addition levels of different treating agents on the funnel viscosity, filter loss, expansion ratio, friction coefficient and water dissociation rate of the slurry were tested. Thirdly, based on the results of single-factor tests, a water-based slurry formula suitable for pipe jacking in expansive soil was obtained. Finally, the slurry formula was applied in a practical pipe jacking project in expansive formation, and the jacking force was controlled well in the whole jacking process. The new water-based slurry is cheap and practical and has no pollution to environment. Furthermore, a simple and practical calculating method of the pipe jacking force was presented. The comparison of the calculated and measured pipe jacking force shows that the simple calculating method can estimate the jacking force well. Improving slurry performance to reduce jacking force in pipe jacking and predicting pipe jacking force accurately can help reducing the investment for counterforce wall and jacking system in pipe jacking engineering. |
| format | Article |
| id | doaj-art-7aa75fcc7b704d4b827dc70ebe2e5466 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-7aa75fcc7b704d4b827dc70ebe2e54662025-02-03T06:05:25ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/90404719040471Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive SoilXian Yang0Yang Liu1Chao Yang2School of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaHunan Provincial Key Laboratory of Shale Gas Resource Utilization, Hunan University of Science and Technology, Xiangtan 411201, ChinaHunan Provincial Key Laboratory of Shale Gas Resource Utilization, Hunan University of Science and Technology, Xiangtan 411201, ChinaWhen the pipe jacking technology is applied in expansive formation, the soil around the pipe will easily absorb water from the slurry and expand to wrap up the pipe, producing an excessive pipe jacking force. A water-based slurry formula suitable for pipe jacking in expansive soil layer was proposed in this paper. Firstly, the key design points of pipe jacking slurry in expansive soil were put forward. Secondly, plant glue, potassium humate, Na-CMC, and graphite powder were chosen as treating agents to improve the slurry performance. The effect of addition levels of different treating agents on the funnel viscosity, filter loss, expansion ratio, friction coefficient and water dissociation rate of the slurry were tested. Thirdly, based on the results of single-factor tests, a water-based slurry formula suitable for pipe jacking in expansive soil was obtained. Finally, the slurry formula was applied in a practical pipe jacking project in expansive formation, and the jacking force was controlled well in the whole jacking process. The new water-based slurry is cheap and practical and has no pollution to environment. Furthermore, a simple and practical calculating method of the pipe jacking force was presented. The comparison of the calculated and measured pipe jacking force shows that the simple calculating method can estimate the jacking force well. Improving slurry performance to reduce jacking force in pipe jacking and predicting pipe jacking force accurately can help reducing the investment for counterforce wall and jacking system in pipe jacking engineering.http://dx.doi.org/10.1155/2018/9040471 |
| spellingShingle | Xian Yang Yang Liu Chao Yang Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive Soil Advances in Civil Engineering |
| title | Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive Soil |
| title_full | Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive Soil |
| title_fullStr | Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive Soil |
| title_full_unstemmed | Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive Soil |
| title_short | Research on the Slurry for Long-Distance Large-Diameter Pipe Jacking in Expansive Soil |
| title_sort | research on the slurry for long distance large diameter pipe jacking in expansive soil |
| url | http://dx.doi.org/10.1155/2018/9040471 |
| work_keys_str_mv | AT xianyang researchontheslurryforlongdistancelargediameterpipejackinginexpansivesoil AT yangliu researchontheslurryforlongdistancelargediameterpipejackinginexpansivesoil AT chaoyang researchontheslurryforlongdistancelargediameterpipejackinginexpansivesoil |