CN102003175A - Method for forecasting water inflow of railway karst tunnel water filling cavity through dewatering test method - Google Patents
Method for forecasting water inflow of railway karst tunnel water filling cavity through dewatering test method Download PDFInfo
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- CN102003175A CN102003175A CN2010105407923A CN201010540792A CN102003175A CN 102003175 A CN102003175 A CN 102003175A CN 2010105407923 A CN2010105407923 A CN 2010105407923A CN 201010540792 A CN201010540792 A CN 201010540792A CN 102003175 A CN102003175 A CN 102003175A
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Abstract
The invention relates to a method for forecasting water inflow of a railway karst tunnel water filling cavity through a dewatering test method, which is characterized by comprising the following steps of, firstly, utilizing an advance geological probe hole of the karst tunnel water filling cavity as a dewatering hole to dewater, controlling the dewatered quantity through installing a valve at the hole opening of the dewatering hole, and installing a pressure gauge to measure water pressure variation in the dissolved cavity; secondly, regularly observing and recording the dewatered quantity and the water pressure, and establishing a mathematical function model of a trend of the dewatered quantity and the water pressure varying along with time; thirdly, utilizing the trend model to forecast future values of the corresponding dewatered quantity and the corresponding time under different water pressures; and fourthly, determining a water pumping and drainage facility according to dynamic trend analysis results of the dewatered quantity, the cavity dewatering time and the like, drawing up a corresponding cavity treatment scheme or measure, and arranging a construction period of continuously tunnelling a dewatered cavity and tunnel. The method has the advantages of simpleness, practicability, rapidness and reliable test result and can timely make pointed reference to supply accurate data for treating a water-rich cavity by adopting an energy release depressurization method during tunnel design and construction.
Description
Technical field:
The present invention relates to molten chamber water yield Forecasting Methodology, relate in particular to the method for the molten chamber of a kind of outflow test method prediction railway Karst Tunnel water-filling water yield.This technology is applicable to the water yield prediction in the molten chamber of water-filling, buried complex karst tunnel and can voltage drop method handles molten chamber the robust techniques foundation is provided for the tunnel adopts to release.
Background technology
The water yield in the molten chamber of railway Karst Tunnel water-filling (is the karst water storage capacity, comprise its volume storage capacity (quiet reserves), groundwater flow amount (moving reserves)) be difficult to determine, it is subjected to all multifactor controls such as excretion in the irregular spatial shape in molten chamber itself, phreatic increment and molten chamber, " cannot see, can not touch ".And the hydrogeological fringe conditions in the molten chamber of GPRS needs numerous exploration meanses, expends great amount of manpower and time, even so, is subjected to the restriction of people's understanding and objective condition, also is difficult to grasp the hydrogeological fringe conditions of molten chamber complexity comprehensively.But when meeting with the molten chamber of water-filling in the constructing tunnel process, require in time, and provide molten chamber karst water storage capacity data as far as possible exactly, get rid of in the molten chamber underground water and construct so that formulate measures areput.
Before proposing, the present invention also do not have effective ways to predict the molten chamber of Karst Tunnel water-filling water yield.
Summary of the invention:
The objective of the invention is in order to solve the deficiency that the above-mentioned background technology exists, propose under a kind of spatial shape and complicated hydrogeological fringe conditions unknown situation thereof in the molten chamber of water-filling, utilize the method for the molten chamber of outflow test method prediction railway Karst Tunnel water-filling water yield, make it can utilize to predict the outcome and instruct constructing tunnel.
Variable in society, the economic or natural science all can be subjected to the influence of various factors, thereby their time series is exactly the overall result of these factor affecting, shows as dynamic change.When in one period, forecasting object changes the trend that presents certain rising or decline according to the time, and there are not (significantly) seasonal variations, cyclical variations, then can find an appropriate mathematical function model to reflect this variation tendency, be independent variable promptly with time t, time series y is a dependent variable, sets up trend model:
When thinking that this trend can extend to future, preset time t future value, its substitution model can be obtained the predicted value (Forward Modeling and Inversion all can) of the time series variable in the corresponding moment.Here it is based on the trend analysis method of time series analysis.
The present invention follows this principles of science, proposes following technical scheme: the method for the molten chamber of outflow test method prediction railway Karst Tunnel water-filling water yield is characterized in that this method step is as follows:
1) the advance geologic inspecting hole that utilizes the molten chamber of Karst Tunnel water-filling discharges water as the dewatering orifice, aperture, dewatering orifice mounted valve control waterdrainage amount, and the setting pressure table is measured the variation in water pressure in the molten chamber;
2) time sight record waterdrainage amount, hydraulic pressure are set up waterdrainage amount, the hydraulic pressure mathematical function model of variation tendency in time;
3) utilize trend model to predict corresponding waterdrainage amount and the future value of time under the different water pressures;
4) according to dynamic trend analysis achievements such as waterdrainage amount, molten chamber drainage times, determine to take out, drainage, formulate corresponding molten chamber processing scheme or measure, the construction period of arrange the molten chamber of drainage, the tunnel continuing driving.
The present invention sets up waterdrainage amount, hydraulic pressure and time trend model according to the outflow test data, utilizes trend model to obtain corresponding waterdrainage amount of different water pressures and the future value of time.
This method is simple, practicality, quick, and test result is reliable, can be that Tunnel Design, construction adopt " releasing the energy voltage drop method " rich water-soluble chamber of processing that accurate data is provided in time, targetedly.The processing of water-soluble chamber has reference function and promotional value to similar richness.
Description of drawings:
Fig. 1 is discharge water total amount and hydraulic pressure graph of relation of 629 molten chambeies, tunnel, Qi Yue mountain.
The specific embodiment:
The method of the molten chamber of outflow test method prediction railway Karst Tunnel water-filling water yield is under the hydrogeological fringe conditions unknown situation of the spatial shape in the molten chamber of water-filling and complexity thereof, key elements such as the molten chamber waterdrainage amount that obtains by actual observation in the process that discharges water that control is arranged, water pressure, time, the application trend analytic approach is set up the Mathematical Modeling of variation tendency between reflection waterdrainage amount, water pressure, the time three, thus a kind of novel method of the molten chamber of prediction railway Karst Tunnel water-filling water yield.
During concrete enforcement, squeeze into an amount of boring at tunnel tunnel face to molten chamber, carry out controlled discharging water, its waterdrainage amount of time recording, hydraulic pressure (head height), and observe its Changing Pattern, when observed data runs up to certain sample number, can set up the trend model that waterdrainage amount, hydraulic pressure and time change, model utilizes trend model to obtain corresponding waterdrainage amount of different water pressures and the future value of time through after the assay was approved.Simultaneously, along with the carrying out of outflow test, constantly there is new observed data to add to come in, then need the interim new trend model of foundation, implement the management of dynamic, the future value of the waterdrainage amount of forecast updating, hydraulic pressure or time is until the intended purposes that reaches outflow test.
The method of the invention is applied in the processing procedure of the suitable molten chamber of mileage water-filling, tunnel, ten thousand railway Qi Yue mountains " DK363+629 ", predicted value and actual waterdrainage amount, discharge time basically identical, in the time of prediction, reached the effect that drainage should the water-soluble chamber of richness, made the tunnel work be able to push ahead smoothly as scheduled.
Below be the present invention's Application Example in the processing procedure of the suitable molten chamber of mileage water-filling, tunnel, ten thousand railway Qi Yue mountains " DK363+629 ":
Should ten thousand railways pass through that high mountain, remote mountains, landform are dangerously steep, ravines and guillies criss-cross, complicated geology, it is the railway that geology is the most complicated on the railway construction in China history, construction is the most difficult, especially buried Karst Tunnel of growing up such as Ye Sanguan, big Zhi Ping, cloud and mist mountain, the red deer mountain valley with clumps of trees and bamboo, Qi Yueshan, its complicated hydrogeological conditions, karst and underground water are grown, construction risk is huge, is decided to be I class risk tunnel by domestic expert.Under so complicated geological environment, build the tunnel, be called a world-class difficult problem by engineering circle, geology circle multidigit academician and expert.
The applicant should ten thousand railway Qi Yue mountain constructing tunnels meets with the water-soluble chamber of large-scale richness to DK363+629, construction is hampered, can construct by voltage drop method if take to release, need know the karst water storage capacity in molten chamber, so molten chamber karst water storage capacity prediction correctness is related to the risk and the effect of constructing tunnel.
System Changxing group (P on the Permian System is grown in the molten chamber of tunnel DK363+629, Qi Yue mountain
2c) in the limestone, the about 650m of molten chamber buried depth is grown in nearly vertical tunnel.East side, molten chamber is Wu Jiaping (P
2w) shale and coal measure strata, the west side is Daye group (T
1d) shale, marl, being between the two relative aquicludes, the face of land is a karst valley.Molten chamber complex shape, rich groundwater.
Outflow test: construct near " 629 molten chamber " from positive and negative both direction in the tunnel, at forward and reverse different faces totally 60 inspecting holes have been carried out in molten chamber, to each inspecting hole mounted valve, wherein 2 inspecting holes that go deep in the underground water of molten chamber are installed water pressure gauge (not discharging water), and other inspecting hole carries out controlled ground outflow test.
In September, 2006 and in November, 2009 have been carried out outflow test twice to this molten chamber, according to the outflow test data, waterdrainage amount and variation in water pressure have been carried out trend analysis, and have predicted the water yield that (drainage) need discharge when hydraulic pressure was reduced to 0.01MPa.Molten chamber waterdrainage amount and hydraulic pressure relation curve are seen Fig. 1.
Predict the discharge water water yield and drain time such as following table that molten chamber hydraulic pressure descends:
629 molten chamber discharge times, hydraulic pressure～waterdrainage amount correlation analysis and prediction
As can be seen from the above table, when hydraulic pressure is reduced to 0.01MPa, predict that molten chamber karst water storage capacity (quiet, moving reserves) is respectively 57.3 ten thousand steres, 53.0 ten thousand steres, differ about 30,000,1 ten thousand stere respectively with actual displacement 54.1 ten thousand steres, prediction conforms to substantially with reality; The prediction of the molten chamber of drainage need 11.1 days with actual 11.9 days also basically identicals.
Effect: pass through outflow test, the water yield in the molten chamber of water-filling and the time that this molten chamber karst water storage capacity of drainage needs have been confirmed, its achievement is released in the construction of energy voltage drop method in the postorder tunnel, obtained checking, successfully solved a constructing tunnel difficult problem, final safety realized should ten thousand railways be open to traffic, be subjected to affirming of construction unit and expert.
Claims (1)
1. the outflow test method is predicted the method for the molten chamber of railway Karst Tunnel water-filling water yield, it is characterized in that this method step is as follows:
1) the advance geologic inspecting hole that utilizes the molten chamber of Karst Tunnel water-filling discharges water as the dewatering orifice, aperture, dewatering orifice mounted valve control waterdrainage amount, and the setting pressure table is measured the variation in water pressure in the molten chamber;
2) time sight record waterdrainage amount, hydraulic pressure are set up waterdrainage amount, the hydraulic pressure mathematical function model of variation tendency in time;
3) utilize trend model to predict corresponding waterdrainage amount and the future value of time under the different water pressures;
4) according to dynamic trend analysis achievements such as waterdrainage amount, molten chamber drainage times, determine to take out, drainage, formulate corresponding molten chamber processing scheme or measure, the construction period of arrange the molten chamber of drainage, the tunnel continuing driving.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597224A (en) * | 2015-01-27 | 2015-05-06 | 河南理工大学 | Three-drop distance non-steady flow dewatering test method for probing mine hydrogeology |
| CN104792966A (en) * | 2015-04-08 | 2015-07-22 | 西南交通大学 | Testing device and method for simulating stratum cavities caused by subway shield tunnel construction |
| CN105179009A (en) * | 2015-08-27 | 2015-12-23 | 重庆大学 | External water pressure testing device and method for water-rich karst tunnel lining |
| CN105840235A (en) * | 2016-05-09 | 2016-08-10 | 湖南大学 | Exploration and draining method for pressure-bearing karstic water in tunneling process |
| CN108627436A (en) * | 2017-03-20 | 2018-10-09 | 中国海洋石油集团有限公司 | A kind of prediction technique of the underground water-seal oil depot water yield based on construction dynamic monitoring data |
| CN108955649A (en) * | 2018-05-21 | 2018-12-07 | 中国矿业大学 | A kind of prediction technique of coal mine work area top plate process water yield |
| CN109113788A (en) * | 2018-05-31 | 2019-01-01 | 中国地质大学（武汉） | A kind of Karst Tunnel karst water inflow method |
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| CN101294502A (en) * | 2007-04-23 | 2008-10-29 | 张庆玉 | Multifunctional vacuum firepower waterpower dual-power generation and water-lifting water distributing station |
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Patent Citations (1)
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| CN101294502A (en) * | 2007-04-23 | 2008-10-29 | 张庆玉 | Multifunctional vacuum firepower waterpower dual-power generation and water-lifting water distributing station |
Non-Patent Citations (1)
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| 汪继锋: "齐岳山隧道629溶腔地下水分析与判断", 《铁道勘察》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597224A (en) * | 2015-01-27 | 2015-05-06 | 河南理工大学 | Three-drop distance non-steady flow dewatering test method for probing mine hydrogeology |
| CN104792966A (en) * | 2015-04-08 | 2015-07-22 | 西南交通大学 | Testing device and method for simulating stratum cavities caused by subway shield tunnel construction |
| CN105179009A (en) * | 2015-08-27 | 2015-12-23 | 重庆大学 | External water pressure testing device and method for water-rich karst tunnel lining |
| CN105840235A (en) * | 2016-05-09 | 2016-08-10 | 湖南大学 | Exploration and draining method for pressure-bearing karstic water in tunneling process |
| CN105840235B (en) * | 2016-05-09 | 2017-12-01 | 湖南大学 | Method is put in the spy of pressure-bearing karst water in a kind of tunnel excavating process |
| CN108627436A (en) * | 2017-03-20 | 2018-10-09 | 中国海洋石油集团有限公司 | A kind of prediction technique of the underground water-seal oil depot water yield based on construction dynamic monitoring data |
| CN108627436B (en) * | 2017-03-20 | 2020-12-29 | 中国海洋石油集团有限公司 | Method for predicting water inflow of underground water seal oil depot based on construction dynamic monitoring data |
| CN108955649A (en) * | 2018-05-21 | 2018-12-07 | 中国矿业大学 | A kind of prediction technique of coal mine work area top plate process water yield |
| CN108955649B (en) * | 2018-05-21 | 2020-06-16 | 中国矿业大学 | Method for predicting water inflow in roof process of coal mine working face |
| CN109113788A (en) * | 2018-05-31 | 2019-01-01 | 中国地质大学（武汉） | A kind of Karst Tunnel karst water inflow method |
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Application publication date: 20110406 |