CN206706793U - A kind of combined relief well for being used to reduce artesian head pressure - Google Patents

A kind of combined relief well for being used to reduce artesian head pressure Download PDF

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Publication number
CN206706793U
CN206706793U CN201720491428.XU CN201720491428U CN206706793U CN 206706793 U CN206706793 U CN 206706793U CN 201720491428 U CN201720491428 U CN 201720491428U CN 206706793 U CN206706793 U CN 206706793U
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China
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steel pipe
relief well
diameter
wellhole
closed steel
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CN201720491428.XU
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Inventor
王海
乔国强
石强
张利强
赵策
徐加飞
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China Railway 12th Bureau Group Co Ltd
Second Engineering Co Ltd of China Railway 12th Bureau Group Co Ltd
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China Railway 12th Bureau Group Co Ltd
Second Engineering Co Ltd of China Railway 12th Bureau Group Co Ltd
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Abstract

The utility model is a kind of combined relief well for being used to reduce artesian head pressure, anti- dash forward of water barrier on the one hand can not be made full use of to gush intensity to reduce precipitation using conventional precipitation method, plugging dewatering well is difficult after the completion of another aspect structure, conventional pressure relief well construction is once because power failure or fault of water pump stop pumping simultaneously, within the relatively short time water level can be caused to steeply rise, even the problem of foundation ditch can be flooded, including relief well in relief well and foundation ditch is provided with outside the foundation ditch of immersible pump.The utility model can effectively reduce useless precipitation, reduce emergent risk and later stage closure is simple and reliable, reduce invalid precipitation, improve precipitation efficiency, and pass through structure optimization, the crash time is striven for, failure risk is reduced, while the structure is easy to the later stage to block on the basis of it ensure that bottom plate, waterproof roofing effect.

Description

A kind of combined relief well for being used to reduce artesian head pressure
Technical field
The deep foundation pit precipitation such as subway station, Tall Building Foundation field is the utility model is related to, is specially that one kind is used to drop The combined relief well of low artesian head pressure.
Background technology
As the mankind can utilize gradually decreasing for land resource, the mankind constantly expand space to underground, have benefited from society The development of economic construction, base pit engineering quantity is more and more, and scale is increasing, and depth is more and more deeper, and precipitation becomes deep base Cheat the most important thing of construction field.Simultaneously because environmental protection, energy-conservation and settlement Control constantly improve, extensive unlimited precipitation is Through gradually being abandoned by construction field, then stratum characteristic and the impermeable role of matched building enclosure are made full use of, It is accurate reduce fixed point region, the base pit dewatering science of underground water of point range is gradually risen, wherein utilizing building enclosure and ground The drainage precipitation that lower water barrier forms closing space isolation periphery underground water is presently the most a kind of conventional precipitation form, still Because artesian water head pressure is larger under deep basal pit water barrier, is excavated according to required projected depth, necessarily disturb water barrier, So that after overburden layer more than pressure water head is die-offed, Foundation Pit Pouring phenomenon easily occurs, using the direct precipitation method one of routine Aspect can not make full use of anti-dash forward of water barrier to gush intensity, reduce precipitation, plugging dewatering well is stranded after the completion of another aspect structure Difficulty, while once conventional pressure relief well construction can cause water because power failure or fault of water pump stop pumping within the relatively short time Position is steeply risen, or even can flood foundation ditch, and large effect is produced to normal construction.
The content of the invention
The utility model gushes by force for anti-dash forward for solving to use conventional precipitation method on the one hand can not make full use of water barrier Degree reduces precipitation, and plugging dewatering well is difficult after the completion of another aspect structure, while once conventional pressure relief well construction is because having a power failure Or fault of water pump stops pumping, the problem of within the relatively short time water level being caused to steeply rise, or even foundation ditch can be flooded, Provide a kind of combined relief well for being used to reduce artesian head pressure.
The utility model is achieved by the following technical solution:A kind of combined type for being used to reduce artesian head pressure subtracts Kill-job, including relief well in relief well and foundation ditch is provided with outside the foundation ditch of immersible pump, the outer relief well of foundation ditch includes being arranged on wellhole The closed steel pipe of diameter identical, filter pipe and sediment tube interior and be sequentially connected downwards from ground, closed steel pipe sequentially pass through simultaneously It is arranged on water table aquifer and water barrier and at lower 1 meter of water barrier, filter pipe and sediment tube are arranged in artesian aquifer, closed The diameter of steel pipe, filter pipe and sediment tube is less than well diameter, between closed steel pipe and wellhole on water barrier and water barrier Clay ball is backfilled in the range of 2 meters of side, backfill is common in the range of 2 meters above water table aquifer and water barrier between closed steel pipe and wellhole Soil, filtrate is backfilled in the range of artesian aquifer between filter pipe, sediment tube and wellhole;
The outer relief well of relief well foundation ditch includes being arranged on the diameter phase being sequentially connected in wellhole and downwards from top plate in foundation ditch With closed steel pipe, filter pipe and sediment tube, closed steel pipe sequentially passes through and is arranged on top plate, in bottom plate and water barrier and distance At lower 1 meter of water barrier, it is connected on the outside of closed steel pipe in the thickness range positioned at top plate and bottom plate along its surface perimeter The outer seal ring set, filter pipe and sediment tube are arranged in artesian aquifer, the diameter of closed steel pipe, filter pipe and sediment tube Less than well diameter, clay ball is backfilled in the range of 2 meters above water barrier and water barrier between closed steel pipe and wellhole, it is closed Between steel pipe and wellhole common soil, filter pipe, precipitation are backfilled in the water table aquifer in the range of 2 meters above bottom base plate and water barrier Between pipe and wellhole filtrate is backfilled in the range of artesian aquifer.
The diameter of closed steel pipe, filter pipe and sediment tube is more than 10 centimetres of the diameter of immersible pump, and less than the diameter of wellhole 15 centimetres.The diameter of closed steel pipe, filter pipe and sediment tube is less than 15 centimetres of decentralizations for having three kinds of well casings of assistant of well diameter, and It is easy to it to be finely adjusted in decentralization process to the perpendicularity of well casing;The diameter of closed steel pipe, filter pipe and sediment tube is big In 10 centimetres of the diameter of immersible pump, be advantageous to immersible pump and required depth is placed into by well casing, while 10 centimetres of gap helps In backfill common soil, clay ball and filtrate.
The concrete main body bottom plate and top plate one-piece casting of the outer seal ring and upstream face of closed steel pipe.Outer seal ring difference It is welded in bottom plate and top board construction, thickness is advisable with 5 millimeters, and width is more than 10 centimetres and is easy to reinforcing bar colligation, and concrete pours Pour and be integrated with bottom plate, top plate when building;In addition, interior seal ring is welded when blocking top plate hole after dewatering well dismounting, thickness It is advisable with 5 millimeters, width is more than 5 centimetres and is easy to concrete vibrating;Inside and outside seal ring and closed steel-pipe welding are tight, it is ensured that only Water effect.
Nylon wire is provided with the outside of sediment tube, the screen distance of nylon wire is 60 mesh.The Buddhist nun of the additional mesh of screen distance 60 of sediment tube Imperial net can effectively assemble filtered laminar flow and enter tiny sand grains and landwaste in filter pipe, reduce the silt content drawn water, and reduce The ground loss of fine particle in stratum.
Filter pipe is bridge type filter pipe.The arched hole mouth of bridge type filter pipe is that special construction causes gravel to be not easy to block hole Eye, while special hole shape structure serves the effect of enhancing water filter mechanical strength, bridge type filter pipe has higher discharge capacity, Can obtain the water source of more efficient, bridge type filter pipe system using steel plate punching, roll and form, in light weight, price is low.
Clay ball is advisable with 20~30mm of diameter.Clay ball is fat clay, is advantageous to closed steel pipe and wellhole patch Close close.
Filtrate, which chooses the preferable silicon gravel sand grains of psephicity, to be advisable.The preferable silicon gravel sand grains of psephicity, can as filtrate To prevent surrounding soil from entering in pipe to greatest extent, while water penetration to greatest extent can be ensured, be easy to precipitation.
Setting steps of the present utility model are:
1st, well casing size is determined according to precipitation scheme pump power, logical production well casing diameter is more than immersible pump diameter 10cm, root Dewatering well bore diameter is determined according to well casing diameter, usual bore diameter is more than well casing diameter 15cm;
2nd, drilled in the pre- location of well, as preferably selecting clean-out machine pore-forming;
The 3rd, sediment tube is installed:And back cover is carried out, sediment tube is transferred to the height suitable for reading for being easy to connection;
The 4th, filter pipe is installed:By filter pipe with sediment tube is suitable for reading is welded to connect, connection need to ensure welding quality and drainage Pipe with sediment tube is concentric welds, twine nylon wire on sediment tube then as decentralization well casing, nylon wire aperture is according to calculating determination;
The 5th, closed steel pipe is installed:By closed steel pipe with filter pipe is suitable for reading is welded to connect, connection need to ensure welding quality and Closed steel pipe, filter pipe, sediment tube weld with one heart;
6th, well casing is transferred into specified location according to projected depth to be fixed and well casing is remedied into pore-forming center;
7th, filtrate is backfilled:Space between well casing and pore-forming is backfilled to water barrier lower surface using filtrate, it is ensured that surrounding backfills Uniformly, it is closely knit;
8th, clay ball is backfilled:After filtrate is backfilled to designed elevation, clay ball is backfilled, clay ball backfill height is higher than water proof Layer upper surface 2m;
9th, common earthen backfill:After clay ball is backfilled to designed elevation, gather materials on the spot, remaining space is backfilled to ground, it is complete Into decompression well construction;
10th, outer seal ring welding:Excavation of foundation pit on earth after construction cushion coat, outer waterproofing layer is with reference at wall pipe at well casing Reason, the outer seal ring of portion's welding, top plate handle same bottom plate in the soleplate;
11st, after structure meets anti-floating requirement, termination of pumping, pumping system, slip casting closure are removed;
12nd, interior seal ring welding:After cutting off remaining well casing, in seal ring, casting concrete, completion in welding in the middle part of top plate Construction.
Design structure of the present utility model is reasonable, and thinking is unique, simple to operate, safe and efficient, economic and practical.Can be effective The useless precipitation of reduction, reduce emergent risk and later stage closure is simple and reliable;Drop is accurately controlled not only through layering precipitation Low specified water-bearing layer underground water or hydraulic pressure, reduce invalid precipitation, improve precipitation efficiency, and by structure optimization, strive for Crash time, failure risk is reduced, while the structure is easy to the later stage on the basis of it ensure that bottom plate, waterproof roofing effect Closure;The present invention is easy for construction, technique is simple, improves precipitation efficiency, has saved construction cost, it is ensured that later stage waterproof is imitated Fruit, practical, promotion prospect is good.
Brief description of the drawings
Fig. 1 is to arrange schematic diagram outside foundation ditch of the present utility model;
Fig. 2 is arrangement schematic diagram in foundation ditch of the present utility model.
In figure:The closed steel pipes of 1-, the outer seal rings of 2-, seal ring in 2.1-, 3- filter pipes, 4- sediments tube, 5- is commonly native, 6- clay balls, 7- filtrates, A- water table aquifers, B- water barriers, C- artesian aquifers, D- bottom plates, E- top plates.
Embodiment
The utility model is described further with reference to Fig. 1 and Fig. 2, a kind of combined type for being used to reduce artesian head pressure Relief well, including relief well in relief well and foundation ditch is provided with outside the foundation ditch of immersible pump, the outer relief well of foundation ditch includes being arranged on well Diameter identical closed steel pipe 1, filter pipe 3 and the sediment tube 4 being sequentially connected from ground in hole and downwards, closed steel pipe 1 is successively Pass through and be arranged on water table aquifer A and water barrier B and at lower 1 meter of water barrier B, filter pipe 3 and sediment tube 4 are arranged at pressure-bearing In water layer C, the diameter of closed steel pipe 1, filter pipe 3 and sediment tube 4 is less than well diameter, between closed steel pipe 1 and wellhole be located at every Clay ball 6 is backfilled above water layer B and water barrier B in the range of 2 meters, water table aquifer A and water barrier are located between closed steel pipe 1 and wellhole The common soil 5 of backfill in the range of 2 meters, backfills filter in the range of artesian aquifer C above B between filter pipe 3, sediment tube 4 and wellhole Material 7;The outer relief well of relief well foundation ditch includes being arranged on the diameter identical being sequentially connected in wellhole and downwards from top plate in foundation ditch Closed steel pipe 1, filter pipe 3 and sediment tube 4, closed steel pipe 1 sequentially passes through and is arranged on top plate E, in bottom plate D and water barrier B and At lower 1 meter of water barrier B, the closed outside of steel pipe 1 is connected to along it in top plate E and bottom plate D thickness range The outer seal ring 2 that surface perimeter is set, filter pipe 3 and sediment tube 4 are arranged in artesian aquifer C, closed steel pipe 1, filter pipe 3 It is less than well diameter with the diameter of sediment tube 4, positioned at the 2 meters of models in water barrier B and water barrier B tops between closed steel pipe 1 and wellhole Enclose interior backfill clay ball 6, the water table aquifer A between closed steel pipe 1 and wellhole in the range of 2 meters above bottom plate D bottoms and water barrier B The middle common soil 5 of backfill, is located at backfill filtrate 7 in the range of artesian aquifer C between filter pipe 3, sediment tube 4 and wellhole.
The diameter of closed steel pipe 1, filter pipe 3 and sediment tube 4 is more than 10 centimetres of the diameter of immersible pump, and straight less than wellhole 15 centimetres of footpath.The outer seal ring 2 of closed steel pipe 1 and the concrete main body bottom plate D of upstream face and top plate E one-piece castings.Sediment tube 4 Outside is provided with nylon wire, and the screen distance of nylon wire is 60 mesh.Filter pipe 3 is bridge type filter pipe.Clay ball 6 with diameter 20~ 30mm is advisable.Filtrate 7, which chooses the preferable silicon gravel sand grains of psephicity, to be advisable.
Embodiment:
Substantial amounts of artesian aquifer is contained in certain deep basal pit bottom, by the exploration of early stage find its internal artesian head pressure compared with Greatly, directly using dewatering well dewatering mode the defects of certain be present, using combined relief well of the present utility model, including it is closed Steel pipe 1, bridge-type impact tube filter, seal ring, underground water barrier, major structure of construction etc. form, and specifically include in foundation ditch Relief well and foundation ditch two kinds of forms of outer relief well, well casing diameter determine that typically larger than immersible pump is straight according to configuration immersible pump diameter Footpath 10cm, drilling diameter are more than pipe well diameter 15cm, are easy to backfill filtrate 7, clay ball 6 and common soil 5.
The wherein outer relief well well bore of foundation ditch is by the closed steel pipe 1 on water barrier, the filter pipe 3 under water barrier B And the sediment tube 4 positioned at shaft bottom forms, the closed steel pipe 1 can use helix tube, welded tube or seamless steel pipe, and wall thickness is according to drop Well depth determines, need to ensure the sealing of welding during connection, and the backfill of its outside and water table aquifer A contact portions can backfill can Gather materials on the spot, do not require;Outside is backfilled with water barrier contact portion using clay ball 6, and the backfill height of clay ball 6 is water barrier B lower surfaces to water barrier B upper surfaces above 2m, it is ensured that isolation diving and artesian water after backfill;The filter pipe 3 is by bridge-type punching press Pipe forms, and wall thickness determines according to precipitation well depth, outsourcing nylon filter, and screen pack aperture determines according to water yield is calculated, and leads to 60 mesh often are taken, fill out 3 ~ 7mm stones outside as filtrate 7;The sediment tube 4 can use common steel tube, and wall thickness is according to precipitation well depth It is determined that;Clay ball 6 is advisable with 20~30mm of diameter, is prepared and air-dried standby using tonerde;Chosen as preferred filtrate 7 The preferable silicon gravel sand grains of psephicity is advisable.
In foundation ditch relief well well bore remove the closed steel pipe 1 on the water barrier, the filter pipe 3 under water barrier B and Outside the sediment tube 4 in shaft bottom, outer seal ring 2 also in the middle part of bottom plate D and top plate E structures, in the middle part of top plate knot E structures Interior seal ring 2.1 form.The relief well casing programme and backfill require identical with the outer relief well of foundation ditch;Outer seal ring 2 divides It is not welded when bottom plate D and top plate E constructs, thickness is advisable with 5mm, and width is more than 10cm and is easy to reinforcing bar colligation, and concrete pours Pour and be integrated with bottom plate D, top plate E when building;Interior seal ring 2.1 is welded when blocking top plate hole after dewatering well dismounting, thickness It is advisable with 5mm, width is more than 5cm and is easy to concrete vibrating;Inside and outside seal ring welds tightly with closed steel pipe 1, it is ensured that sealing Effect.
Finally it should be noted that:Above example is only to illustrate the technical solution of the utility model, rather than it is carried out Limitation, although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art is to foregoing reality Apply the technical scheme described in example to modify, including partly or entirely technical characteristic of the present utility model is equally replaced Change, the essence of its appropriate technical solution is without departing from the scope of protection of the utility model.

Claims (7)

1. a kind of be used to reduce the combined relief well of artesian head pressure, including be provided with outside the foundation ditch of immersible pump relief well and Relief well in foundation ditch, it is characterised in that:The outer relief well of foundation ditch includes being arranged in wellhole and is sequentially connected downwards from ground straight The closed steel pipe of footpath identical(1), filter pipe(3)And sediment tube(4), closed steel pipe(1)Sequentially pass through and be arranged on water table aquifer(A) And water barrier(B)And apart from water barrier(B)At lower 1 meter, filter pipe(3)And sediment tube(4)It is arranged at artesian aquifer(C)In, Closed steel pipe(1), filter pipe(3)And sediment tube(4)Diameter be less than well diameter, closed steel pipe(1)Between wellhole be located at every Water layer(B)And water barrier(B)Clay ball is backfilled in the range of 2 meters of top(6), closed steel pipe(1)It is located at water table aquifer between wellhole (A)And water barrier(B)Common soil is backfilled in the range of 2 meters of top(5), filter pipe(3), sediment tube(4)It is located at pressure-bearing between wellhole Water layer(C)In the range of backfill filtrate(7);
The outer relief well of relief well foundation ditch includes being arranged on the diameter identical being sequentially connected in wellhole and downwards from top plate in foundation ditch Closed steel pipe(1), filter pipe(3)And sediment tube(4), closed steel pipe(1)Sequentially pass through and be arranged on top plate(E), bottom plate(D)With Water barrier(B)It is interior and apart from water barrier(B)At lower 1 meter, closed steel pipe(1)Outside is positioned at top plate(E)And bottom plate(D)Thickness In the range of be connected to along its surface perimeter set outer seal ring(2), filter pipe(3)And sediment tube(4)It is arranged at and holds Press water layer(C)In, closed steel pipe(1), filter pipe(3)And sediment tube(4)Diameter be less than well diameter, closed steel pipe(1)With It is located at water barrier between wellhole(B)And water barrier(B)Clay ball is backfilled in the range of 2 meters of top(6), closed steel pipe(1)And wellhole Between be located at bottom plate(D)Bottom and water barrier(B)Water table aquifer in the range of 2 meters of top(A)The middle common soil of backfill(5), filter pipe (3), sediment tube(4)It is located at artesian aquifer between wellhole(C)In the range of backfill filtrate(7).
A kind of 2. combined relief well for being used to reduce artesian head pressure according to claim 1, it is characterised in that:It is close Close steel pipe(1), filter pipe(3)And sediment tube(4)Diameter be more than immersible pump 10 centimetres of diameter, and less than wellhole diameter 15 Centimetre.
A kind of 3. combined relief well for being used to reduce artesian head pressure according to claim 1, it is characterised in that:It is close Close steel pipe(1)Outer seal ring(2)With the concrete main body bottom plate of upstream face(D)And top plate(E)One-piece casting.
A kind of 4. combined relief well for being used to reduce artesian head pressure according to claim 1, it is characterised in that: Sediment tube(4)Outside is provided with nylon wire, and the screen distance of nylon wire is 60 mesh.
5. a kind of combined relief well for being used to reduce artesian head pressure according to claim 1 or 2, its feature exist In:Filter pipe(3)For bridge type filter pipe.
A kind of 6. combined relief well for being used to reduce artesian head pressure according to claim 1, it is characterised in that:It is glutinous Soil ball(6)It is advisable with 20~30mm of diameter.
A kind of 7. combined relief well for being used to reduce artesian head pressure according to claim 1, it is characterised in that:Filter Material(7)Choosing the preferable silicon gravel sand grains of psephicity is advisable.
CN201720491428.XU 2017-05-05 2017-05-05 A kind of combined relief well for being used to reduce artesian head pressure Active CN206706793U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108677981A (en) * 2018-04-18 2018-10-19 中国十七冶集团有限公司 A kind of discharge structure and its construction method of ultra-deep piping lane foundation pit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108677981A (en) * 2018-04-18 2018-10-19 中国十七冶集团有限公司 A kind of discharge structure and its construction method of ultra-deep piping lane foundation pit

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