CN204825940U - Precipitation well well casing - Google Patents
Precipitation well well casing Download PDFInfo
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- CN204825940U CN204825940U CN201520599128.4U CN201520599128U CN204825940U CN 204825940 U CN204825940 U CN 204825940U CN 201520599128 U CN201520599128 U CN 201520599128U CN 204825940 U CN204825940 U CN 204825940U
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- well
- main body
- shutoff
- well main
- main part
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Abstract
The utility model discloses a precipitation well well casing, including the tubular well main part, its characterized in that, still include welded fastening in the tubular well main part upper portion outside one stagnant water crown plate all around, and be fixed in the filter equipment of port under the tubular well main part, be provided with the drain valve near last port position department in the tubular well main part, the drain valve lies in in the tubular well main part between port and the stagnant water crown plate, filter equipment is in by the welding the steel reinforcement cage of port department under the tubular well main part, and the parcel is in the wire net in the steel reinforcement cage outside constitutes. The utility model discloses a shutoff method of hole and precipitation well is reserved to the foundation ditch, water pressure or gush the water yield and also can succeed the shutoff when great and reserve hole and precipitation well underground, and the shutoff is of high quality to the shutoff is simple and convenient, and construction cost is lower, has spreading value.
Description
Technical field
The present invention relates to a kind of foundation ditch hole to be provided method for blocking, belong to construction technology in geotechnical engineering field.
Background technology
Along with developing on an unprecedented scale of China's geotechnical engineering, China's base pit engineering quantity gets more and more, and scale is also increasing, the degree of depth of foundation ditch also along with and deepen, and the subsurface geology condition of complexity makes foundation pit dewatering science rise rapidly.Current, China is larger and the degree of depth is darker foundation ditch is more, foundation occur sometimes unavoidably some reserved openings and ater-casting such rear construction part, these positions often when there being underground bearing water shutoff comparatively difficult, particularly more difficult when the later stage, dewatering well did not use substantially, dewatering well can only be increased like this make concrete in casting process, not have water upwards to ooze in hole to be provided, such way can ensure the compactness of concreting, if do not take such measure, inside concrete can form more upwards pipelined channel under hydraulic pressure, concrete construction compactness quality cannot be ensured, take to cheat that interior dewatering well draws water is ensure that base plate of foundation pit resists prominently to gush stable effective ways.But now most of underground bearing water has all gathered the dewatering well of this type of foundation ditch and former sole plate stays in the relief well dewatering well established, this type of foundation ditch hydraulic pressure is large, the water yield is large, once stop pumping, water level sharply rises, make the shutoff of this type of well extremely difficult especially, how this type of well of shutoff is the present invention needs one of problem solved.
Summary of the invention
Goal of the invention: the object of the invention is for the deficiencies in the prior art, provide one can groundwater pressure or water yield larger time, guarantee the dewatering well well casing of shutoff success rate;
Another object of the present invention is to provide a kind of method using this dewatering well well casing shutoff foundation ditch hole to be provided.
Technical scheme: dewatering well well casing of the present invention, comprises pipe well main body, is fixedly welded on one sealing ring flat-plate of surrounding outside described pipe well body top, and is fixed on the filter of described pipe well main body lower port; Described pipe well main body is being provided with draining valve near upper port position, described draining valve is between pipe well main body upper port and sealing ring flat-plate, described filter is by the reinforcing cage being welded on described pipe well main body lower port, and the gauze wire cloth be wrapped in outside described reinforcing cage is formed.
As further restriction, described pipe well main body adopts wall thickness 8mm, and internal diameter is the steel pipe of 600mm, and the length of steel pipe is according to treating that the foundation depth of shutoff is determined.
As further restriction, described sealing ring flat-plate adopts the doughnut-shaped steel plate of wide 200mm, thick 5mm.
The method of dewatering well well casing shutoff foundation ditch hole to be provided of the present invention, comprises the steps:
(1) foundation ditch hole to be provided shutoff:
(1-a) clear up foundation ditch bottom hole to be provided, the absolute altitude after cleaning, lower than periphery bed course absolute altitude, after having cleared up, excavating one for burying the mine pit of dewatering well well casing underground, backfilling rubble as filtration beds bottom mine pit bottom hole to be provided in the middle part of foundation ditch;
(1-b) the dewatering well well casing made in advance is put into the mine pit filling in rubble, make the upper port of pipe well main body lower than the sole plate upper surface 25mm ~ 35mm built;
(1-c) with rubble by pit backfill bottom mine pit and hole to be provided, re-lay bed course and fish tail and waterproof layer to design elevation;
(1-d) after fish tail and waterproof layer has been laid, colligation hole to be provided shutoff reinforcing bar; And before building blocking concrete, in the draining valve side of pipe well main body, a pre-buried elevation of bottom is lower than the hole mould of draining valve delivery port, as reserved outfall;
(1-e) work after all completing more than, build hole to be provided blocking concrete with than the higher leveled waterproof concrete of former sole plate label, continue to draw water with water pump simultaneously in pipe well main body, guarantee that bottom hole to be provided, water level is lower than this blocking concrete;
(1-f) when building blocking concrete, building in pipe well main body surrounding simultaneously, avoiding occurring pipe well main body to squeeze inclined phenomenon; And the well head of pipe well main body is covered temporarily, avoid concrete to pour in well;
(2) plugging dewatering well:
(2-a) reach after some strength until hole to be provided blocking concrete and take out water pump, and be rapidly in pipe well main body to tamp and meet water slow any intumescent material, open the draining valve of pipe well main body simultaneously, use the outfall of water pump to draining valve side to continue to draw water, guarantee the first plugging plate position that the water level in pipe well main body is preset lower than draining valve top;
(2-b) weld first plugging plate, welded rear closedown draining valve, and check whether that existence is oozed, drainage;
(2-c) on first plugging plate, slightly expanded concrete is built after checking leakproof point to the second plugging plate position of presetting;
(2-d) weld second plugging plate, and it is closely knit to use slightly expanded concrete to build shutoff the outfall of draining valve side.
Specific works principle of the present invention is: first use the water level bottom dewatering well reduction hole to be provided, use label higher leveled waterproof concrete shutoff hole to be provided again, the water pump taken out after some strength in dewatering well is reached until concrete, hydraulic pressure now in dewatering well can come up very soon, tamp in dewatering well pipe well rapidly and meet the slow any intumescent material of water, open draining valve simultaneously, use water pump to continue the outfall reserved to draining valve side to draw water, allow water level in pipe well main body lower than first plugging plate height, weld the first plugging plate, last in order to shutoff safety, first plugging plate builds slightly expanded concrete and welds the second plugging plate, complete the shutoff of dewatering well.
Improve technique scheme further, in step (1-a), after foundation ditch has been cleared up bottom hole to be provided; absolute altitude is lower than periphery bed course absolute altitude 350mm; after the rubble that backfill 200mm is thick, then lay the bed course of 100mm and the fish tail and waterproof layer of 50mm successively, reach periphery bed course absolute altitude.
Preferably, in step (1-a), the length and width of mine pit is 1000mm.
Preferably, in step (1-d), the length and width of outfall is 200mm.
Preferably, after described in step (1-b), dewatering well well casing puts into mine pit, to doing reinforced bar support process bottom it.
Preferably, meet described in step (2-a) the slow any intumescent material of water be slightly expanded concrete and mix in cotton-wool wherein, soya bean, sea-tangle one or more.
Preferably, the CAL filament expansion agent accounting for concrete quality 4% ~ 6% is added with in step (2-c) and the slightly expanded concrete described in (2-d).
Beneficial effect: the method for (1) dewatering well well casing of the present invention and shutoff foundation ditch hole to be provided, can groundwater pressure or water yield larger time also can successful shutoff hole to be provided and dewatering well, shutoff quality is good, and shutoff is simple and convenient, construction cost is lower, has promotional value;
(2) the present invention is expanded closely knit by any intumescent material after sealing completes in pipeline, reaches the object of self-compaction permanent waterproof in pipe, can not again leak after construction, improves plugging effect;
(3) the present invention is provided with the reinforcing cage filtered bottom pipe well, can prevent having sand and rubble to enter district of drawing water when concreting, causes the shutoff failure caused because water pump damages, improves shutoff success rate further.
Accompanying drawing explanation
Fig. 1 is the structural representation of dewatering well of the present invention;
Fig. 2 be in the embodiment of the present invention 1 step (3) complete after schematic diagram.
1-pipe well main body in figure, 2-draining valve, 3-sealing ring flat-plate, 4-reinforcing cage, 5-bed course, 6-fish tail and waterproof layer, 7-outfall, 8-meets the slow any intumescent material of water, 9-first plugging plate, 10-second plugging plate.
Detailed description of the invention
Below by accompanying drawing, technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to described embodiment.
embodiment 1:a method for blocking for foundation ditch hole to be provided, comprises the steps:
(1) dewatering well is made:
(1-a) select the thick 8mm of an endwall, internal diameter be the steel pipe of 600mm as pipe well main body 1, length is determined according to foundation depth;
(1-b) install draining valve 2 at distance pipe well main body 1 upper port 150mm place, the tube connector of draining valve 2 welds with between pipe well main body 1, and solder joint does antirust treatment;
(1-c) at the sealing ring flat-plate 3 of distance pipe well main body 1 upper port 300mm position welding together wide 200mm, thick 5mm;
(1-d) weld a reinforcing cage 4 filtered in pipe well main body 1 lower port and wrap up with twice gauze wire cloth outside reinforcing cage 4.
(2) foundation ditch hole to be provided shutoff:
(2-a) foundation ditch bottom hole to be provided is cleared up, absolute altitude after cleaning is lower than periphery bed course absolute altitude 350mm, after having cleared up, bottom hole to be provided, in the middle part of foundation ditch, excavate a length and width be 1000mm, be the mine pit of the downward 1200mm of periphery bed course deeply, upwards backfill the thick rubble of 200mm bottom mine pit as filtration beds;
(2-b) the dewatering well well casing made in step (1) is put into the mine pit filling in thick rubble, make the upper port of pipe well main body 1 lower than sole plate upper surface 30mm;
(2-c) with rubble by pit backfill bottom mine pit and hole to be provided, re-lay the bed course 5 of 100mm and fish tail and waterproof layer 6 to the design elevation of 50mm;
(2-d) after fish tail and waterproof layer 6 has been laid, colligation hole to be provided shutoff reinforcing bar; And before concreting, at the hole mould of the pre-buried elevation of bottom in draining valve 2 side of pipe well main body 1 lower than draining valve delivery port 100mm, as reserved outfall 7;
(2-e) work after all completing more than, build hole to be provided blocking concrete with than the higher leveled waterproof concrete of former sole plate label, continue to draw water with water pump simultaneously in pipe well main body 1, guarantee that bottom hole to be provided, water level is lower than this blocking concrete;
(2-f) when building blocking concrete, building in pipe well main body 1 surrounding simultaneously, avoiding occurring pipe well main body 1 to squeeze inclined phenomenon; And the well head of pipe well main body 1 is covered temporarily, avoid concrete to pour in well;
(3) plugging dewatering well:
(3-a) reach after some strength until hole to be provided blocking concrete and take out water pump, and be rapidly in pipe well main body 1 to tamp and meet water slow any intumescent material 8, open the draining valve 2 of pipe well main body simultaneously, use the outfall 7 of water pump to draining valve 2 side to continue to draw water, guarantee the position of the first plugging plate 9 that the water level in pipe well main body 1 is preset lower than draining valve 2 top;
(3-b) weld first plugging plate 9, welded rear closedown draining valve 2, and check whether that existence is oozed, drainage;
(3-c) on first plugging plate 9, slightly expanded concrete is built after checking leakproof point to second plugging plate 10 position of presetting;
(3-d) weld second plugging plate 10, and it is closely knit the outfall 7 of draining valve 2 side to be used slightly expanded concrete to build shutoff.
Meet described in step (3-a) the slow any intumescent material of water be slightly expanded concrete and mix in cotton-wool wherein, soya bean, sea-tangle one or more.
The CAL filament expansion agent accounting for concrete quality 4% ~ 6% is added with in step (3-c) and the slightly expanded concrete described in (3-d).
As mentioned above, although represented with reference to specific preferred embodiment and described the present invention, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite not departing from claims definition, various change can be made in the form and details to it.
Claims (3)
1. a dewatering well well casing, comprises pipe well main body, it is characterized in that, also comprises the one sealing ring flat-plate being fixedly welded on surrounding outside described pipe well body top, and is fixed on the filter of described pipe well main body lower port; Described pipe well main body is being provided with draining valve near upper port position, described draining valve is between pipe well main body upper port and sealing ring flat-plate, described filter is by the reinforcing cage being welded on described pipe well main body lower port, and the gauze wire cloth be wrapped in outside described reinforcing cage is formed.
2. dewatering well well casing according to claim 1, is characterized in that, described pipe well main body adopts wall thickness 8mm, and internal diameter is the steel pipe of 600mm, and the length of steel pipe is according to treating that the foundation depth of shutoff is determined.
3. dewatering well well casing according to claim 1, is characterized in that, described sealing ring flat-plate adopts the doughnut-shaped steel plate of wide 200mm, thick 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520599128.4U CN204825940U (en) | 2015-08-10 | 2015-08-10 | Precipitation well well casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520599128.4U CN204825940U (en) | 2015-08-10 | 2015-08-10 | Precipitation well well casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204825940U true CN204825940U (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520599128.4U Expired - Fee Related CN204825940U (en) | 2015-08-10 | 2015-08-10 | Precipitation well well casing |
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| CN (1) | CN204825940U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178342A (en) * | 2015-08-10 | 2015-12-23 | 中建八局第三建设有限公司 | Precipitation well casing and method for blocking reserved hole of foundation pit through precipitation well casing |
| CN108755653A (en) * | 2018-06-05 | 2018-11-06 | 中冶天工集团有限公司 | A kind of plug-in type medium coarse sand draining assistor and its application method |
-
2015
- 2015-08-10 CN CN201520599128.4U patent/CN204825940U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178342A (en) * | 2015-08-10 | 2015-12-23 | 中建八局第三建设有限公司 | Precipitation well casing and method for blocking reserved hole of foundation pit through precipitation well casing |
| CN105178342B (en) * | 2015-08-10 | 2017-03-22 | 中建八局第三建设有限公司 | Precipitation well casing and method for blocking reserved hole of foundation pit through precipitation well casing |
| CN108755653A (en) * | 2018-06-05 | 2018-11-06 | 中冶天工集团有限公司 | A kind of plug-in type medium coarse sand draining assistor and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20180810 |