A novel analytical method incorporating valve pressure for the controlled drainage of transport tunnels
| Autor: | Ben-Guo He, Xi-Wei Zhang, Jia-Hua Xie, Hui Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
geography
geography.geographical_feature_category Petroleum engineering 0211 other engineering and technologies Controlled drainage 02 engineering and technology Building and Construction Inflow 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Finite element method Field monitoring Environmental science Support system Drainage Drainage system (agriculture) Groundwater 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Tunnelling and Underground Space Technology. 106:103637 |
| ISSN: | 0886-7798 |
| DOI: | 10.1016/j.tust.2020.103637 |
| Popis: | A novel drainage method using pressure valves to regulate the water pressure acting on the support system of transport tunnels is proposed in order to reduce water inflow and protect the local groundwater environment as much as possible. A complete analytical solution to the problem is further derived to assess the water pressure borne by the support system (assuming pressure valves are installed in the side ditches of the tunnel). No assumptions need to be made about the water penetrating the lining. Under this premise, the amount of water inflow is balanced by the water pressure acting on the tunnel lining to ensure the safety of the lining. To restrict the water inflow to the maximum amount allowed, using our novel drainage method allows the thickness of the grouted zone to be significantly reduced compared to conventional methods and, therefore, reduces costs and speeds up the construction process. Results predicted using our analytical solution are in excellent agreement with those derived via field monitoring and numerical (finite element) modeling. The relative errors are less than 0.15%, suggesting that our analytical solution is a reliable way of assessing the seepage expected in our novel drainage system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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