CN109736340A - A kind of sole plate reserves the dewatering device and method of dewatering well guarantee bed course integrality - Google Patents
A kind of sole plate reserves the dewatering device and method of dewatering well guarantee bed course integrality Download PDFInfo
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- CN109736340A CN109736340A CN201910131417.4A CN201910131417A CN109736340A CN 109736340 A CN109736340 A CN 109736340A CN 201910131417 A CN201910131417 A CN 201910131417A CN 109736340 A CN109736340 A CN 109736340A
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- dewatering
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- precipitation
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Abstract
The present invention relates to a kind of sole plates to reserve the dewatering device and method that dewatering well guarantees bed course integrality, its main feature is that including drainpipe, pump, well-point pipe, filter pipe, suction hose；And precipitation pipe well, the gravel filtrate outside downcast well pipe, the washing gravelly sand filtrate in downcast well pipe under blinding layer and basal surface in water-bearing layer are set；Suction hose is arranged under blinding layer, and connects with pump；The other end connects well-point pipe, is filter pipe in well-point pipe lower part；Well-point pipe and filter pipe are packed into precipitation pipe well, and washing gravelly sand filtrate is filled outside well-point pipe and filter pipe；In the filter pipe upper end of well-point pipe lower part.Terminate in excavation of foundation pit, when reserved precipitation pipe well being needed to continue dewatering operation under sole plate, using this method.Present device is simple and convenient to operate, improves construction efficiency and quality of waterproof layer, security risk caused by can avoid because of construction cross-operation such as concrete bed course, waterproof layer, waterproof protective layer, sole plate etc..
Description
Technical field
The present invention relates to building field excavation of foundation pit precipitation, concrete bed course, waterproof layer, waterproof protective layer, sole plate are constructed,
In particular to a kind of sole plate reserves the dewatering device and method that dewatering well guarantees bed course integrality.
Background technique
When excavation of foundation pit, if level of ground water is higher than substrate, need to carry out foundation pit drop in excavation of foundation pit and civil construction
Level of ground water is down to substrate or less 0.5m (or meeting design requirement) by water operation.
Tube well dewatering is one of main method of base pit dewatering, (or has opposite water proof in water-bearing layer when foundation pit area is larger
Layer), precipitation pipe well is when being laid in precipitation outside substrate and not being able to satisfy design and construction and require, base internal is also required to lay downcomer
Well carries out dewatering operation, to meet excavation of foundation pit and subsequent civil Engineering Design construction requirement, if after the completion of excavation of foundation pit, foundation pit
Still there is precipitation pipe well to need to continue dewatering operation under interior substrate, then needs to reserve downcomer in subsequent substrate cushion construction
To continue dewatering operation, there is endless whole face, can not make in subsequent construction of waterproof layer in such blinding layer at well position
Complete waterproof level, and the waterproof protective layer of its subsequent handling, sole plate also will appear kindred circumstances, meanwhile, on basis
In the work progress of bottom plate, precipitation pipe well position baseplate reinforcing bar needs to cut off, and reserves well head position for downcomer well water pump
It proposes or replacement, precipitation drainpipe, water pump cable is also required to extend to outside basis from pipe well position, the reinforcing bar with foundation construction
Binding, formwork, concrete placings form cross-operation, influence construction efficiency and generate biggish security risk.If handling bad drop
Waterproof slab quality at water pipe manhole may cause bottom plate infiltration, the serious consequence that basement soaks for a long time after completion of works.
Such as Chinese Patent Application No. are as follows: " anti-float anchor rod built in a kind of sole plate precipitation of deep well disclosed in 201510323347.4
Plugging structure and construction method ".
It is as follows to reserve the relatively good technology management step of dewatering well for sole plate at present:
Data source: how is dewatering well in BBS. construction construction technology [sharing] building deep foundation raft board post poured band
It blocks (being published in 2018.7.30)
1. making waterproof steel sleeve using the hot rolled seamless steel tube of Φ 325 × 8, waterproof steel sleeve height is not less than concrete bottom plate
The sum of with cushion thickness.
2. processing water string sealing outer ring, according to steel bushing pipe outside diameter, selection processes sealing not less than the steel plate of 6mm thickness
The outer diameter of ring, outer ring is not less than 525mm.
3. welding sealing outer ring.Sealing outer ring is located at the intermediate position of waterproof steel sleeve height.
4. sealing inner ring bolt welding selects the pipe flange and pipe being consistent with steel sleeve according to the internal diameter of waterproof steel sleeve
Blind flange, will be on bolt welding pipe flange.
5. pipe flange to be welded on to the intermediate position of casing height.
6. welding steel sleeve pedestal.The 150mm long reinforcing bar of 4 Φ 20 is selected, water string bottom is symmetrically welded at.
7. fixed waterproof steel sleeve
Before bottom board concrete bed course pours, steel sleeve is fixed on the precipitation well head of dewatering well overcentre, precipitation water pump
It is put into dewatering well across steel sleeve and carries out precipitation.
8. construction of waterproof layer at steel sleeve
Construct base plate waterproofing when, turn to seal ring bottom on the outside of waterproof steel sleeve on waterproof layer, using lute in into
Row waterproof shell nosing treatment.
9. floor structure is constructed
When base plate steel bar binding, Ying Antu paper and design requirement add additional bar to constructing around water string.
10. plugging dewatering well
When allowing to stop precipitation according to design requirement, it should first stop precipitation in foundation pit, in plugging dewatering well and then stop
The only outer precipitation of foundation pit reduces hydraulic pressure when precipitation well in foundation pit blocks, blocks convenient for precipitation well in foundation pit；Precipitation well in foundation pit stops
Only after precipitation, precipitation bottom backfills graded sand and stone, backfills normal silicate dry cement in the 2.0m depth bounds of dewatering well top.
11. waterproof steel sleeve flange seal
Rubber washer is made according to the size of pipe flange cover board and bolt eye, rubber washer is with a thickness of 10mm；It will make in advance
The rubber washer performed is inserted on the bolt of steel sleeve, places into pipe flange lid, is symmetrically staggeredly tightened nut with box spanner, is protected
Demonstration orchid cover plate for sealing is tight, air tight.
12. concrete placings
After confirming the tight acceptance(check) of flange cover plate for sealing, it will clean out in steel sleeve, poured in cover board upper tube
The dry and hard concrete of a label grade higher than bottom board concrete, meanwhile, the bottom plate reserving hole outside sealing steel sleeve, which synchronizes, to be poured the bottom of than
The microdilatancy concrete of the high label of plate concrete, concrete vibration densification is real.
13. concrete curing
Before concrete reaches initial set, progress is secondary to be rolled, and reduces concrete plastic shrinkage, surface plastic covering film, to micro- at this
Expansive concrete is conserved, and curing time is not less than 14 days.
There are problem, sole plate described above is pre- for the processing technique measure of dewatering well reserved for current sole plate
The treatment measures for staying dewatering well are a kind of current relatively good processing methods, but still remain many shortcomings, specifically:
Waterproof steel sleeve needs that material is more, manufacturing process is cumbersome.Steel sleeve uses the hot rolling seamless steel of Φ 325 × 8
Pipe production, is highly not less than the sum of concrete bottom plate and cushion thickness.From a waterproof steel sleeve make material just need Φ 325 ×
8 hot rolled seamless steel tube is about 0.5--1.0m (concrete base plate thickness is generally 0.4--1.0m)；Steel plate not less than 6mm thickness is processed
The outer diameter of seal ring, outer ring is not less than 525mm；The pipe flange and pipe flange lid that casing is consistent, will be on bolt welding pipe flange；Weldering
Connect steel sleeve pedestal.The 150mm long reinforcing bar of 4 Φ 20 is selected, water string bottom is symmetrically welded at.In addition to material, only
Processing content just has the hot rolled seamless steel tube of Φ 325 × 8 to cut；The production of seal ring, pipe flange lid；Seal ring, pipe flange with
Welding between waterproof steel sleeve, only the length of double welded joint is just more than two meters, and needs between pipe flange and water string in steel pipe
Interior welding, welding difficulty are bigger；Bolt and pipe flange welding, the welding of steel sleeve pedestal reinforcing bar.
Process multiplexing kind is miscellaneous.Dewatering well problem is handled, only process just has production waterproof steel sleeve, fixed waterproof steel bushing
Additional bar (special project design), plugging dewatering well, waterproof steel are added at pipe, steel sleeve when construction of waterproof layer, floor structure construction
The multiple working procedures such as casing flange sealing, concrete placings, concrete curing, being related to work post has cutting, welding, reinforcement fabrication, waterproof homework, concrete
Multiple work posts such as pour.
Cross-operation reduces work efficiency, increases security risk.In bed course, waterproof layer, waterproof protective layer, reinforcing bar binding, branch
Mould, concrete placings construction when, the cable of dewatering well (multiple), drainpipe need it is overhead extend out to outside sole plate, give
Civil construction affects greatly, and not only influences construction efficiency, but also bring security risk.
Waterproof quality still has hidden danger.Because work progress process is more, work post is miscellaneous, any one link, which goes wrong, all may be used
It can cause base plate leakage；Meanwhile although waterproof layer is not accomplished to be closed completely using multi layer waterproof measure.
Engineering cost loss is high.The direct cost loss of reserved dewatering well processing has a variety of materials consumption, artificial, mechanical
Expenditure of time, construction efficiency is lost caused by indirect expense consumption has because of reserved dewatering well processing, and indirect expense consumption is much
It is consumed greater than direct cost.
Summary of the invention
The purpose of the present invention is intended to overcome the shortcomings of that existing sole plate reserves the measure of dewatering well processing technique, provides one kind
Equipment basis that is simple, easy for operation, can thoroughly solving the reserved dewatering well destruction blinding layer integrality of sole plate
Bottom plate reserves dewatering well and guarantees the dewatering device and method of bed course integrality, so that blinding layer, waterproof layer, concrete protection can be improved
The construction efficiency of layer, concrete bottom plate reduces construction cost, improves quality of waterproof layer, and safety caused by avoiding because of cross-operation etc. is hidden
Suffer from.
For achieving the above object, the technical scheme is that
A kind of sole plate reserves the dewatering device of dewatering well guarantee bed course integrality, including drainpipe 1, pump 2, described outer
Drainpipe is connect with pump drainage mouth；The pump is placed in outside sole plate, in operation side；It is characterized by also including wells
Point pipe 8, filter pipe 10, suction hose 11；And blinding layer 3 and the downcast well pipe 6 in the lower water-bearing layer of basal surface 4, drop are set
The washing gravelly sand filtrate 7 in gravel filtrate 5, downcast well pipe outside well pipe；Wherein:
The suction hose is arranged under blinding layer, and connects with pump；The other end connects well-point pipe, is in well-point pipe lower part
Filter pipe；The well-point pipe and filter pipe are packed into downcast well pipe, and washing gravelly sand filtrate is filled outside well-point pipe and filter pipe；
The filter pipe upper end in well-point pipe lower part；And the position that water level 9 can reach in dewatering well in Precipitation Process
It sets.
The method that dewatering well guarantees the dewatering device of bed course integrality is reserved using a kind of sole plate, it is characterised in that:
Excavation of foundation pit terminates, when reserved precipitation pipe well being needed to continue dewatering operation under sole plate, the specific side of the dewatering operation of use
Method are as follows:
(1), according to the water outlet status of precipitation pipe well, selection can satisfy the pump of requirement, drainpipe, suction hose, well-point pipe,
Filter pipe；
(2), pump is installed in foundation pit work surface outside sole plate, it is more closer better apart from dewatering well；Pump drain pipe, row are installed
The good drainpipe of cloth is to drafting drainage point；Pump and suction hose are connected to dewatering well position；By well-point pipe, the drainage of quasi- tripping in dewatering well
Pipe connects spare；It is spare that the washing gravelly sand of quasi- backfill dewatering well is transported to precipitation well head；
(3), it closes, extract precipitation immersible pump in dewatering well, be inserted into filter pipe, the well-point pipe having had connected, will wash
Gravelly sand inserts in dewatering well on filter pipe 0.9~1.1mSuction hose and well-point pipe are connected, pumping water is started；
(4), it digs minor groove suction hose is put into groove, squeezes into base with the fine steel rib for curving U-shapedBottomIt is fixed；
(5), observe dewatering well in water level, after pumping water in dewatering well stable level and can satisfy design and construction require
Afterwards, backfill washing gravelly sand to substrate and is tamped；Recording vacuum gauge numerical value, in case being compared when subsequent maintenance precipitation；
A kind of sole plate of the invention reserves the dewatering device and method and existing skill that dewatering well guarantees bed course integrality
Art compares, and substantive distinguishing features and significant effect are:
It is simple and convenient to operate using equipment.Fundamentally change sole plate reserve dewatering well need blinding layer,
The way of reserving hole, embedded waterproof steel sleeve, makes civil construction have basis on waterproof layer, waterproof protective layer and sole plate
Bottom plate becomes to construct as without reserved dewatering well in the case where reserving dewatering well, avoids construction of waterproof layer hidden danger of quality,
Cross-operation security risk is avoided, the reduction of construction efficiency caused by cross-operation is avoided, has reduced or remitted the reserved drop of sole plate
People, machine, material and the time investment of well processing.
Detailed description of the invention
Fig. 1 is the schematic diagram of apparatus and method of the present invention principle.
Fig. 2 is the schematic diagram of suction hose placement of the invention.
In figure: drainpipe 1, pump 2 (vacuum pump, self priming pump, centrifugal pumps), blinding layer 3, basal surface 4, precipitationWellManage outer gravel
Stone filtrate 5, downcast well pipe 6, precipitationWellBackfill washing gravelly sand filtrate 7, well-point pipe 8 in pipe, water level 9 in dewatering well, filter pipe 10,
Suction hose 11.
Specific embodiment
Below in conjunction with the attached drawing specific embodiment that the present invention will be described in detail
A kind of sole plate reserves the dewatering device of dewatering well guarantee bed course integrality
As depicted in figs. 1 and 2, a kind of sole plate reserves the dewatering device that dewatering well guarantees bed course integrality, including row
Water pipe 1, pump 2, well-point pipe 8, filter pipe 10, suction hose 11；And it is arranged under blinding layer 3 and basal surface 4 in water-bearing layer
Downcast well pipe 6, precipitationWellGravel filtrate 5, precipitation outside pipeWellWashing gravelly sand filtrate 7 in pipe；Wherein:
The outer drainpipe is connect with pump drainage mouth；The pump is placed in outside sole plate, in operation side (fertile slot).
The drainpipe is the outer drainpipe of pump, generally using the hoses such as plastic tube, outside water discharge foundation pit that pumping is gone out or
(foundation pit is deeper, and pump cannot be drained directly outside foundation pit from drainability, when needing secondary drainage for specified water tank.)
The suction hose is arranged in the minor groove excavated under blinding layer, generally uses plastic tube (or steel pipe),
When beating concrete bed course below indentation concrete bed course.
The suction hose and pump connect；The other end connects well-point pipe, is filter pipe in well-point pipe lower part；The well-point pipe with
Filter pipe is inserted into downcast well pipe, external filling washing gravelly sand filtrate；The well-point pipe use intensity meets what water suction required
Steel pipe, plastic tube, pvc pipe, suction hose are inserted into precipitation pipe well, and upper end is slightly below substrate, connect with well-point pipe, well-point pipe
Lower end is connect with filter pipe.
The filter pipe is in 6.0m (filter pipe upper end) left-right position under precipitation pipe well shaft bottom or substrate.Filter pipe caliber
(being not less than well point pipe diameter) and pipe range are determining according to precipitation well yield, processing water flowing presbyopia on filter pipe, outsourcing strainer, under
End packet strainer or closure, upper end are connect with well-point pipe.The filter pipe upper end in well-point pipe lower part；And it is dropped in Precipitation Process
The position that water level 9 can reach in well.
A kind of sole plate reserves the precipitation method of dewatering well guarantee bed course integrality
Excavation of foundation pit terminates, and when reserved precipitation pipe well being needed to continue dewatering operation under sole plate, a kind of basis can be used
Bottom plate reserves dewatering well and guarantees that the precipitation method of bed course integrality carries out dewatering operation, method particularly includes:
(1), according to the water outlet status of precipitation pipe well, selection can satisfy the pump of requirement, drainpipe, suction hose, well-point pipe,
Filter pipe.
(2), installation pump (selectes pump, self priming pump, centrifugation as needed in foundation pit work surface (fertile slot) outside sole plate
Pump), it is more closer better apart from dewatering well；Pump drain pipe is installed, drainpipe of having arranged is to drafting drainage point；Connection pump and suction hose are extremely
Dewatering well position；Well-point pipe, the filter pipe of quasi- tripping in dewatering well are connected spare；By the washing gravelly sand of quasi- backfill dewatering well
It is spare to be transported to precipitation well head.
(3), it closes, extract precipitation immersible pump in dewatering well, be inserted into the filter pipe having had connected, well-point pipe (omits upper end
Lower than substrate appropriate location), in washing gravelly sand filling dewatering well to 1.0m on filter pipe or so, suction hose and well point will be connected
Pipe starts pumping water.The working principle of pumping water is that underground water suction pump is discharged for the negative pressure of vacuum effect generated using pump, is managed
It can reach 10m (absolute altitude 0m) by upper water suction depth, common engineering construction pumping inhales depth 5.0--6.0m.Elevator, collection under substrate
The depth in puddle is generally 3.0m or so, and water level in dewatering well is reduced to 5.0-- under substrate using pump in precipitation pipe well
The position 6.0m can meet civil Engineering Design construction requirement completely.
(4), it digs minor groove suction hose is put into groove, squeezes into substrate with the fine steel rib for curving U-shaped and fix.
(5), observe dewatering well in water level, after pumping water in dewatering well stable level and can satisfy design and construction require
Afterwards, backfill washing gravelly sand to substrate and is tamped；Recording vacuum gauge numerical value, in case being compared when subsequent maintenance precipitation.
(6), concrete bed course (civil construction) is poured, dewatering well, suction hose are squeezed under concrete bed course, sole plate reserves precipitation
Well guarantees that the concrete bed course of bed course integrality is completed.
(7), pump Precipitation Process is maintained to require to design and construction are met.
(8), after the completion of dewatering operation, pump is removed, package protection may be selected in water suction end header position, and bottom plate of making provision against emergencies is anti-
Water goes wrong use when needing precipitation.Suction hose is generally the plastic tube that diameter is less than 50mm, and being embedded under bed course will not influence
Foundation bearing capacity, if design requires also filled water mud filling.
Claims (2)
1. a kind of sole plate reserves the dewatering device that dewatering well guarantees bed course integrality, including drainpipe (1), pump (2), described
Outer drainpipe is connect with pump drainage mouth；The pump is placed in outside sole plate, in operation side；It is characterized by also including
Well-point pipe (8), filter pipe (10), suction hose (11)；And it is arranged under blinding layer (3) and basal surface (4) in water-bearing layer
The washing gravelly sand filtrate (7) in gravel filtrate (5), downcast well pipe outside downcast well pipe (6), downcast well pipe；Wherein:
The suction hose is arranged under blinding layer, and connects with pump；The other end connects well-point pipe, is drainage in well-point pipe lower part
Pipe；The well-point pipe and filter pipe are packed into downcast well pipe, and washing gravelly sand filtrate is filled outside well-point pipe and filter pipe；
The filter pipe upper end in well-point pipe lower part；It is also the portion that water level (9) can reach in dewatering well in Precipitation Process
Position.
2. a kind of sole plate according to claim 1 reserves dewatering device and the side that dewatering well guarantees bed course integrality
Method, it is characterised in that: excavation of foundation pit terminates, when reserved precipitation pipe well being needed to continue dewatering operation under sole plate, the drop of use
Water operation method particularly includes:
(1), according to the water outlet status of precipitation pipe well, selection can satisfy pump, drainpipe, suction hose, well-point pipe, the drainage of requirement
Pipe；
(2), pump is installed in foundation pit work surface outside sole plate, it is more closer better apart from dewatering well；Pump drain pipe is installed, is arranged
Drainpipe is to drafting drainage point；Pump and suction hose are connected to dewatering well position；The well-point pipe of quasi- tripping in dewatering well, filter pipe are connected
It connects spare；It is spare that the washing gravelly sand of quasi- backfill dewatering well is transported to precipitation well head；
(3), it closes, extract precipitation immersible pump in dewatering well, be inserted into filter pipe, the well-point pipe having had connected, gravelly sand will be washed
It inserts in dewatering well to 0.9~1.1m on filter pipe, connects suction hose and well-point pipe, start pumping water；
(4), it digs minor groove suction hose is put into groove, squeezes into foundation bed with the fine steel rib for curving U-shaped and fix；
(5), observe dewatering well in water level, after pumping water in dewatering well stable level and can satisfy design and construction require after,
Backfill washing gravelly sand to basal surface and is tamped；Recording vacuum gauge numerical value, in case being compared when subsequent maintenance precipitation；
(6), concrete bed course is poured, dewatering well, suction hose are squeezed under concrete bed course, sole plate reserves dewatering well and guarantees that bed course is complete
Property concrete bed course complete；
(7), pump Precipitation Process is maintained to require to design and construction are met；
(8), after the completion of dewatering operation, pump is removed, package protection may be selected in water suction end header position, and waterproof slab of making provision against emergencies goes out
Use when existing problem needs precipitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910131417.4A CN109736340B (en) | 2019-02-22 | 2019-02-22 | Dewatering device and method for guaranteeing integrity of cushion layer by reserving dewatering well on foundation slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910131417.4A CN109736340B (en) | 2019-02-22 | 2019-02-22 | Dewatering device and method for guaranteeing integrity of cushion layer by reserving dewatering well on foundation slab |
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| CN109736340A true CN109736340A (en) | 2019-05-10 |
| CN109736340B CN109736340B (en) | 2021-03-05 |
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|---|---|---|---|
| CN201910131417.4A Active CN109736340B (en) | 2019-02-22 | 2019-02-22 | Dewatering device and method for guaranteeing integrity of cushion layer by reserving dewatering well on foundation slab |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110093930A (en) * | 2019-05-21 | 2019-08-06 | 中国葛洲坝集团第一工程有限公司 | Base pit engineering energy-saving and emission-reduction water system and method for supplying water |
| CN111021385A (en) * | 2019-12-18 | 2020-04-17 | 宁蔚蔚 | Precipitation method for treating quicksand when manual hole digging pile hole digging meets quicksand layer |
| CN111305241A (en) * | 2019-12-18 | 2020-06-19 | 宁蔚蔚 | Method for treating quicksand in hole digging of manual hole digging pile through light well point dewatering |
| CN112709247A (en) * | 2021-01-20 | 2021-04-27 | 北京城建道桥建设集团有限公司 | Subway construction dewatering system and method for complex ground |
| CN113863343A (en) * | 2021-09-22 | 2021-12-31 | 合诚工程咨询集团股份有限公司 | Construction method of dewatering well capable of being continuously utilized |
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| CN103452124A (en) * | 2013-09-04 | 2013-12-18 | 中国十九冶集团有限公司 | Method and device for removing accumulated water in foundation pit |
| CN203924083U (en) * | 2014-06-27 | 2014-11-05 | 中国水利水电第十三工程局有限公司 | Cushion cap excavation of foundation pit well-points dewatering device |
| CN105625445A (en) * | 2014-11-06 | 2016-06-01 | 五冶集团上海有限公司 | Foundation pit dewatering method in coastal sandy soil region |
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| CN2557592Y (en) * | 2001-05-29 | 2003-06-25 | 韩晓迪 | Pumping equipment for sink well |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093930A (en) * | 2019-05-21 | 2019-08-06 | 中国葛洲坝集团第一工程有限公司 | Base pit engineering energy-saving and emission-reduction water system and method for supplying water |
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| CN111305241A (en) * | 2019-12-18 | 2020-06-19 | 宁蔚蔚 | Method for treating quicksand in hole digging of manual hole digging pile through light well point dewatering |
| CN112709247A (en) * | 2021-01-20 | 2021-04-27 | 北京城建道桥建设集团有限公司 | Subway construction dewatering system and method for complex ground |
| CN113863343A (en) * | 2021-09-22 | 2021-12-31 | 合诚工程咨询集团股份有限公司 | Construction method of dewatering well capable of being continuously utilized |
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| Publication number | Publication date |
|---|---|
| CN109736340B (en) | 2021-03-05 |
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