CN102705006A - Method for governing operating tunnel flood by adopting wellpoint dewatering method - Google Patents
Method for governing operating tunnel flood by adopting wellpoint dewatering method Download PDFInfo
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- CN102705006A CN102705006A CN2012101861598A CN201210186159A CN102705006A CN 102705006 A CN102705006 A CN 102705006A CN 2012101861598 A CN2012101861598 A CN 2012101861598A CN 201210186159 A CN201210186159 A CN 201210186159A CN 102705006 A CN102705006 A CN 102705006A
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Abstract
The invention relates to a method for governing operating tunnel flood by adopting a wellpoint dewatering method. A water collecting main pipe, water pumping equipment, a water level control device, a water discharge hose and a tunnel drainage ditch are adopted, the wellpoint dewatering method is adopted for reducing the underground water level in an operating tunnel, a plurality of wellpoint pipes are arranged at the bottoms of two liners in the operating tunnel, or a plurality of wellpoint pipes are arranged at the intersection points of the two liners arranged in the operating tunnel and a tunnel drainage ditch cover plate surface, the wellpoint pipes are arranged in a well hole drilled by an ordinary rock drilling machine through being matched with a phi 70mm drill bit in a downward direction forming a 30-degree included angle with the vertical direction, the bottoms of the wellpoint pipes need to be positioned in base rocks in positions being 1m under the bottom of the operating tunnel, the 2m positions of the lower ends of the wellpoint pipes are made into filter pipes, the filter pipes are in contact with the bottom of a well hole, the upper ends of the wellpoint pipes are communicated with the water collecting main pipe through a three-way valve, the water collecting main pipe is matched and connected with the water pumping equipment, the water pumping equipment is controlled by a starting box connected with the water level control device, and the wellpoint pipes, the water colling main pipe, the water pumping machine, the water level control device, the water discharge hose and the tunnel drainage ditch form a wellpoint dewatering pipeline system.
Description
Technical field
The present invention relates to the flood improvement method in tunnel, particularly adopt the method for well-points dewatering ruling by law reason operation tunnel flood.
Background technology
At present; The well-points dewatering method is a kind of method of the frequent reduction job location groundwater table that adopts in engineering construction; Generally be used for groundwater table than higher ground works, ground and basic engineering construction, in operation tunnel and duct, then do not use the well-points dewatering method that often adopts in this engineering construction administer take place perhaps flood and contingent flood to take place.Know that according to the applicant because constructing tunnel or design reasons, input operation tunnel and duct can extremely influence because flood takes place, because flood may cause a large amount of infiltrations, because a large amount of infiltrations will have a strong impact on the normal operation in operation tunnel.Usually, in the face of the flood that is taken place of tunnel operation, the administrative department of tunnel operation way when administering flood is few, and effect is also not obvious.Traditional improvement method is nothing but punching slip casting and so on water blockoff measure; Perhaps in two linings, digging groove installation draining blind pipe draws water through outside the discharge operation tunnel, gutter again; The result who does like this is that time-consuming efficient is low again; And might stop up the existing drainage system in tunnel owing to slip casting, dig blind pipe in a large number and on the one hand structure is destroyed that effect is very limited on the other hand.The applicant is through discovering; The flood that will be used for administering the operation tunnel with the well-points dewatering method of engineering construction is very resultful, if can take measures necessary according to operation tunnel concrete condition; The application of well-points dewatering method is proper, can also reach the effect of getting twice the result with half the effort.
Summary of the invention
The objective of the invention is, improve, propose and study the method that adopts well-points dewatering ruling by law reason operation tunnel flood to the deficiency that prior art exists.
Technical solution of the present invention is; Adopt water header, pumping equipment, water-level control apparatus, scupper hose, tunnel drainage ditch; It is characterized in that adopt the well-points dewatering method to reduce groundwater table in the operation tunnel, several well point pipes are installed by two substrate portions in the operation tunnel; Perhaps lining is installed several well points pipes with tunnel drainage trench cover face intersection in operation two in tunnel, and the well point pipe is installed in and becomes with vertical direction downwards in the wellhole that 30 ° of angles are drilled to; Pipe bottom, well point must be in the basement rock of operation tunnel bottom, and chimney filter is processed in pipe lower end, well point, chimney filter contact borehole bottom; Pipe upper end, well point is through threeway and water header UNICOM, and water header and pumping equipment connect; Well point pipe and water header and pumping equipment and water-level control apparatus, scupper hose, tunnel drainage ditch constitute the well-points dewatering pipe network system.
It is characterized in that the wellhole that the well point pipe is installed adopts ordinary rock drill to join ∮ 70mm drill bit and cuts a hole.
It is characterized in that well point pipe mutual spacing is 8-12 meters.
It is characterized in that the well point length of tube is 5 meters.
It is characterized in that the well point pipe adopts Φ 60 * 5 long 5.0mPVC pipes, the length of the chimney filter that be processed into pipe lower end, well point is 2 m.
It is characterized in that chimney filter is drilled with plum blossom hole, the diameter 5mm of plum blossom hole, plum blossom hole mutual spacing 15mm; Five layers of chimney filter outsourcing 100 purpose nylon wires, two layers of gauze wire cloths twine the 20# galvanized wire outward, twine spacing 10mm.
It is characterized in that water-level control apparatus is furnished with starting box, water-level control apparatus and starting box constitute automatic control equipment.
It is characterized in that pumping equipment and automatic control equipment connect.
It is characterized in that pumping equipment and automatic control equipment are installed in the refuge chamber.
It is characterized in that pumping equipment adopts water pumper or water pump.
Innovative point of the present invention is: for the operation tunnel that has built up, owing to can not cut off traffic, there be limited evidence currently of has floods such as the tunnel of method solution preferably seeps water, leaks, and especially administers of a high price especially for the flood in railway operation tunnel.Traditional improvement method is nothing but punching slip casting and so on water blockoff measure; But these class methods have not only been destroyed the splash guard in tunnel, have more likely been stopped up the existing drainage system in tunnel; Also might make original anhydrous location new flood occur; The peripheral hydraulic pressure in tunnel is increased, thereby increase the tunnel support structure load and unsafe factor occurs.The flood that utilization the present invention administers the operation tunnel; Can obtain does not cut off traffic can in time administer the effect of flood again; Especially can add precipitation in rainy season according to the phreatic supply characteristics in the tunnel, strengthen plant maintenance at period of drought; Simultaneously owing to take water-level control apparatus to realize unmanned management; Phreatic water level in the tunnel is remained in certain safe range, and it is following below 1 meter usually the phreatic water level in the tunnel to be controlled at tunnel bottom, prevents the flood generation the tunnel in.Like this, not only reached and administered that flood has satisfied tunnel operating environment requirement but also avoided the employing serial drawback that conventional method caused in the tunnel.
The invention has the advantages that novel, method is reasonable, and is economic and practical, and construction is simple, improvement flood effect is obvious, and management cost is lower.
Description of drawings
Well point pipe that Fig. 1, the present invention adopt and water header and mutual alignment, tunnel concern sketch map;
The well-points dewatering pipe network system sketch map that Fig. 2, the present invention adopt.
The specific embodiment
Below, according to accompanying drawing, describe embodiments of the invention in detail.
Like Fig. 1, shown in Figure 2; The present invention adopts well point pipe 2, water header 3, pumping equipment 7, water-level control apparatus 10, scupper hose 6, tunnel drainage ditch 5; Adopt the well-points dewatering method to reduce groundwater table in the operation tunnel; Several well point pipes 2 are installed by two substrate portions in the operation tunnel; Perhaps lining is installed several well points pipes 2 with tunnel drainage trench cover face intersection in operation two in tunnel, and well point pipe 2 is installed in joins ∮ 70mm drill bit by ordinary rock drill and become with vertical direction downwards in the wellhole that 30 ° of angles are drilled to; The well point is managed 2 bottoms and must be in the basement rock of operation tunnel bottom below 1 meter, and the well point is managed 2 lower ends, 2 metric systems and become chimney filter 1, chimney filter 1 contact borehole bottom; 2 upper ends are managed through threeway 4 and water header 3 UNICOMs in the well point, and water header 3 connects with water pumper equipment 7; Well point pipe 2 constitutes the well-points dewatering pipe network system with water header 3 and water pumper 7 with water-level control apparatus 10, scupper hose 6, tunnel drainage ditch 5.Pumping equipment 7 is by starting box 8 controls that link with water-level control apparatus 10; Water-level control apparatus 10 constitutes automatic control equipment with starting box 8, and pumping equipment 7 connects with automatic control equipment; Horizontal range between the pipe of well point is 8-12 meters.The well point length of tube is generally 5 meters.Pumping equipment 7 is installed in the refuge chamber 9 with automatic control equipment.
Wellhole place installed device mainly comprises well point pipe 2 and water header 3.
Water header 3 is the PVC pressure pipe of internal diameter 100-127mm, and water header 3 adopts threeway 4 to connect with connecting of well point pipe 2.
Pumping equipment 7 is by starting box 8 and water-level control apparatus 10 controls.Starting box 8 connects with tunnel power supply system.Pumping equipment 7 connects scupper hose 6.The water that pumping equipment 7 is discharged gets into tunnel drainage ditch 5 through scupper hose 6.
What be worth explanation is that it is that two linings are arranged with tunnel drainage trench cover face (cable channel cover plate) intersection along operation both sides, tunnel that the optimum position of wellhole is selected.The wellhole that well point pipe 2 is installed is to join ∮ 70mm drill bit with ordinary rock drill to become 30 ° of angle borings to cut a hole the long 5m in hole with operation tunnel bottom vertical direction downwards.In order to guarantee the permeable effect of wellhole, to guarantee that the brill quarrel in the hole is blown out fully repeatedly with the clear hole of pressure-air behind the pore-forming.
Will use the gap between encapsulant shutoff itself and wellhole when well point pipe 2 is installed, water header 3 also will use encapsulant when connecting with well point pipe 2 usefulness threeways 4, prevents that the part generation from leaking.Water header 3 links with pumping equipment 7, and pumping equipment 7 should be positioned at the tunnel down-hill end, and the axle center that makes pumping equipment 7 is a little less than water header 3.
Pumping equipment 7 adopts water pumper or water pump.
According to the performance of water yield size, water pump, the country rock water permeability in operation tunnel; Every water pump can be joined 100-150 root well point pipe 2; And join one and overlap water-level control apparatus 10 and a starting box 8; Groundwater table to reach when the operation tunnel rises to certain altitude with regard to the automatically starting water pump, and the groundwater table decreasing when the operation tunnel just can switch off the pump to certain altitude automatically, thereby reaches unmanned management.Well point pipe 2 can be advisable according to country rock water permeability 8-12 rice along the tunnel spacing of operating, and Qianghian is apart from big more more for the country rock water permeability, and the more weak spacing of water permeability is more little.Water pump can be installed in the refuge chamber 9 in operation tunnel, and scupper hose 6 can lead in the operation existing tunnel gutter, both sides, tunnel 5.Water pump adopts vacuum pump.
The well-points dewatering system should have or not obstruction " dried-up well " (well point pipe 2 in proper working order in use on inspection; When feeling with hand; Sensation cool in summer and warm in winter should be arranged); When dried-up well can have a strong impact on dewatering effect too much, heavily bury after should extracting well point pipe 2 one by one and washing chimney filter 1 repeatedly with water under high pressure, and the well-points dewatering pipe network system that should adopt according to seasonal variations and water level situation adjustment the present invention.Pumping equipment 7 can also dispose centrifugal pump and moisture separator as required.
Claims (10)
1. adopt the method for well-points dewatering ruling by law reason operation tunnel flood; Adopt water header, pumping equipment, water-level control apparatus, scupper hose, tunnel drainage ditch; It is characterized in that; Adopt the well-points dewatering method to reduce groundwater table in the operation tunnel; In the two substrate portions of operation in the tunnel several well points pipes (2) are installed, perhaps two linings in the operation tunnel are installed several well points pipes (2) with tunnel drainage ditch (5) cover plate face intersection, and well point pipe (2) is installed in and becomes with vertical direction downwards in the wellhole that 30 ° of angles are drilled to; Well point pipe (2) bottom must be in the basement rock of operation tunnel bottom, and chimney filter (1) is processed in pipe (2) lower end, well point, chimney filter (1) contact borehole bottom; Well point pipe (2) upper end is through threeway (4) and water header (3) UNICOM, and water header (3) connects with pumping equipment (7); Well point pipe (2) and water header (3) and pumping equipment (7) constitute the well-points dewatering pipe network system with water-level control apparatus (10), scupper hose (6), tunnel drainage ditch (5).
2. the method for employing well-points dewatering ruling by law reason operation according to claim 1 tunnel flood is characterized in that the wellhole that well point pipe (2) is installed adopts ordinary rock drill to join ∮ 70mm drill bit and cuts a hole.
3. the method for employing well-points dewatering ruling by law reason operation according to claim 1 tunnel flood is characterized in that well point pipe (2) mutual spacing is 8-12 meters.
4. the method for employing well-points dewatering ruling by law reason operation according to claim 1 tunnel flood is characterized in that well point pipe (2) length is 5 meters.
5. the method for employing well-points dewatering ruling by law reason operation according to claim 1 tunnel flood is characterized in that well point pipe (2) adopts Φ 60 * 5 long 5.0mPVC pipes, and the length of the chimney filter (1) that be processed into pipe (2) lower end, well point is 2 m.
6. the method for employing well-points dewatering ruling by law reason operation according to claim 1 tunnel flood is characterized in that chimney filter (1) is drilled with plum blossom hole, the diameter 5mm of plum blossom hole, plum blossom hole mutual spacing 15mm; Five layers of chimney filter (1) outsourcing 100 purpose nylon wires, two layers of gauze wire cloths twine the 20# galvanized wire outward, twine spacing 10mm.
7. the method for employing well-points dewatering ruling by law reason operation according to claim 1 tunnel flood is characterized in that water-level control apparatus (10) is furnished with starting box (8), and water-level control apparatus (10) constitutes automatic control equipment with starting box (8).
8. the method for employing well-points dewatering ruling by law reason operation according to claim 7 tunnel flood is characterized in that pumping equipment (7) connects with automatic control equipment.
9. the method for employing well-points dewatering ruling by law reason operation according to claim 8 tunnel flood is characterized in that pumping equipment (7) and automatic control equipment are installed in the refuge chamber (9).
10. the method for employing well-points dewatering ruling by law reason operation according to claim 1 tunnel flood is characterized in that pumping equipment (7) adopts water pumper or water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210186159.8A CN102705006B (en) | 2012-06-07 | 2012-06-07 | Method for governing operating tunnel flood by adopting wellpoint dewatering method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210186159.8A CN102705006B (en) | 2012-06-07 | 2012-06-07 | Method for governing operating tunnel flood by adopting wellpoint dewatering method |
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| CN102705006A true CN102705006A (en) | 2012-10-03 |
| CN102705006B CN102705006B (en) | 2014-02-12 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103233742A (en) * | 2013-05-11 | 2013-08-07 | 中煤科工集团武汉设计研究院 | Treatment measure of bad geological section for long distance pipeline coal conveying |
| CN103397908A (en) * | 2013-07-30 | 2013-11-20 | 西南交通大学 | Buffering system for solving scarce drainage capability of central drainage ditch of tunnel and control method of buffering system |
| CN103628915A (en) * | 2013-11-28 | 2014-03-12 | 中铁十三局集团有限公司 | Dewatering and drainage method for large-section water-rich saturation fine-silt tunnel |
| CN105443141A (en) * | 2015-11-30 | 2016-03-30 | 中国神华能源股份有限公司 | Tunnel base reinforcement method |
| CN107421866A (en) * | 2017-05-16 | 2017-12-01 | 浙江大学 | A kind of experimental rig of simulation tunnel draining seepage state |
| CN113404516A (en) * | 2021-06-24 | 2021-09-17 | 北京中铁诚业工程建设监理有限公司 | Method and device for processing foundation rock surface of railway tunnel |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233742A (en) * | 2013-05-11 | 2013-08-07 | 中煤科工集团武汉设计研究院 | Treatment measure of bad geological section for long distance pipeline coal conveying |
| CN103397908A (en) * | 2013-07-30 | 2013-11-20 | 西南交通大学 | Buffering system for solving scarce drainage capability of central drainage ditch of tunnel and control method of buffering system |
| CN103397908B (en) * | 2013-07-30 | 2015-08-12 | 西南交通大学 | For solving buffer system and the control method of center, tunnel ditch water discharge scarce capacity |
| CN103628915A (en) * | 2013-11-28 | 2014-03-12 | 中铁十三局集团有限公司 | Dewatering and drainage method for large-section water-rich saturation fine-silt tunnel |
| CN105443141A (en) * | 2015-11-30 | 2016-03-30 | 中国神华能源股份有限公司 | Tunnel base reinforcement method |
| CN107421866A (en) * | 2017-05-16 | 2017-12-01 | 浙江大学 | A kind of experimental rig of simulation tunnel draining seepage state |
| CN107421866B (en) * | 2017-05-16 | 2023-05-09 | 浙江大学 | Test device for simulating drainage seepage state of tunnel |
| CN113404516A (en) * | 2021-06-24 | 2021-09-17 | 北京中铁诚业工程建设监理有限公司 | Method and device for processing foundation rock surface of railway tunnel |
| CN113404516B (en) * | 2021-06-24 | 2023-09-22 | 北京中铁诚业工程建设监理有限公司 | Railway tunnel bedrock surface processing method and processing device thereof |
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| CN102705006B (en) | 2014-02-12 |
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