CN203429649U - Pressure reducing type blocking device of foundation pit dewatering well - Google Patents
Pressure reducing type blocking device of foundation pit dewatering well Download PDFInfo
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- CN203429649U CN203429649U CN201320405256.1U CN201320405256U CN203429649U CN 203429649 U CN203429649 U CN 203429649U CN 201320405256 U CN201320405256 U CN 201320405256U CN 203429649 U CN203429649 U CN 203429649U
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- dewatering well
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Abstract
The utility model provides a pressure reducing type blocking device of a foundation pit dewatering well. The pressure reducing type blocking device comprises a guiding floral tube, a water guiding tube and a cover plate, the water guiding tube is communicated with the top end of the guiding floral tube, the cover plate is arranged on the outer wall of the guiding floral tube in a sleeved mode, a stop valve is arranged on the top of the guiding floral tube, the side wall of the bottom end of the guiding floral tube is provided with a plurality of through holes, the guiding floral tube is inserted to the lower portion of a dewatering well tube, and the cover plate is used for blocking the mouth of the dewatering well tube. By means of the special dewatering well blocking device, well blocking construction can be effectively carried out under the drying condition. The pressure reducing type blocking device is suitable for ordinary underground structure construction and especially suitable for basements and other projects which are high in underground water level, large in water inflow and high in waterproof performance requirement, and the application range is very wide. Compared with an existing well blocking method, the pressure reducing type blocking device has the advantages of being high in construction efficiency, convenient to operate, good in water blocking effect and small in later period effect.
Description
Technical field
The utility model relates to the foundation pit construction in structure foundation Foundation Design, relates in particular to a kind of foundation pit dewatering well decompression type plugging device.
Background technology
At present, the super dark foundation ditch of some super larges, has underground water and rivers water system and contacts abundant, dewatering well and pour in the features such as the water yield is large, speed is fast, and shutoff is bad very easily produces piping or quicksand at place, well point, and foundation ditch is produced to destructive harm.And existing plugging dewatering well method is generally pushed down underground water burst head by the mode of medium coarse sand, clay ball, dry cement back pressure, be difficult to guarantee carry out shutoff under sole plate keeps dry the prerequisite of environment, groundwater run off is large, the more difficult shut-in well that completes of fireballing area shoves.
Prior art is generally determined different method for blocking according to the size of groundwater run off, and underground water hour can be after foundation pad construction, a shutoff part before construction of waterproof layer, the part of shutoff remainder again during sole plate concreting.When groundwater run off is larger, continuous pumpage when sole plate concreting, now can select different method for blocking as the case may be.Conventional method for blocking is after underplate concrete has been constructed at present, suction pump in dewatering well is proposed, rapid back-filling in layers medium coarse sand, clay ball etc., underground flood peak is pushed down, and then after the unnecessary well casing higher than base plate being cut off, with dry cement back pressure well casing, then use steel plate soldering and sealing well casing, and adopt high-strength grout to be filled to base plate face.Complicated loaded down with trivial details, the length that expends time in the method practical operation, particularly large for underground swelling amount, the fireballing Project Realization plugging effect that shoves is bad.
Under such hydrogeological conditions, must create the shut-in well that completes that a kind of distinctive shutoff way guarantees dewatering well high-quality and high-efficiency.
Utility model content
The technical problems to be solved in the utility model is: a kind of foundation pit dewatering well decompression type plugging device and method of completing shut-in well that can guarantee dewatering well high-quality and high-efficiency is provided.
The utility model is to solve the problems of the technologies described above taked technical scheme to be:
A kind of foundation pit dewatering well decompression type plugging device, it is characterized in that, it comprises drainage floral tube, the aqueduct communicating with described drainage floral tube top, the cover plate that is sheathed on described drainage floral tube outer wall, the top of described drainage floral tube is provided with stop valve, on the bottom sidewall of described drainage floral tube, offer a plurality of through holes, described drainage floral tube is inserted into dewatering well well casing bottom, and described cover plate is for shutoff dewatering well well casing mouth.
In such scheme, described plugging device also comprises drainage pump or the mudjack being connected with described aqueduct.
In such scheme, described dewatering well well casing is concrete well or steel well casing.
In such scheme, when described dewatering well well casing is concrete well, described plugging device also comprises water string, described water string is sheathed on the top of described concrete well, the outer wall of described water string is provided with at least one seal ring, and described water string is connected by flange with described cover plate.
In such scheme, when described dewatering well well casing is steel well casing, described dewatering well well casing outer wall arranges at least one seal ring.
Compared with prior art, the technique effect that the utility model is obtained is:
1, the utility model adopts special-purpose plugging dewatering well device, can effectively remain on the construction of shunting in a well under drying condition.
2, plugging device of the present utility model is not only applicable to general underground structure construction, is specially adapted to the engineerings such as basement that groundwater table is high, water yield large, water proofing property is had relatively high expectations, and range of application is very extensive.
3, compare with shut-in well mode in the past, efficiency of construction is high, easy to operate, and water sealing effect is good, and later stage impact is little.
Accompanying drawing explanation
The structural representation of the foundation pit dewatering well decompression type plugging device that Fig. 1 provides for the utility model embodiment mono-.
Fig. 2 is the sectional view of the cover plate in Fig. 1.
Fig. 3 is the top view of the cover plate in Fig. 1.
Fig. 4 is the process schematic diagram of the foundation pit dewatering well decompression type method for blocking that provides of the utility model embodiment mono-.
Fig. 5 is the process schematic diagram of the foundation pit dewatering well decompression type method for blocking that provides of the utility model embodiment mono-.
Fig. 6 is the process schematic diagram of the foundation pit dewatering well decompression type method for blocking that provides of the utility model embodiment bis-.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model will be further described, and certain following embodiment should not be construed as restriction of the present utility model.
embodiment mono-
Dewatering well well casing in the present embodiment is steel pipe.
As shown in Figure 1 to Figure 3, a kind of foundation pit dewatering well decompression type plugging device that it provides for the present embodiment, it comprises drainage floral tube 1, the aqueduct 2 communicating with drainage floral tube 1 top, the cover plate 3 that is sheathed on drainage floral tube 1 outer wall.The top of drainage floral tube 1 is provided with stop valve 4.On the bottom sidewall of drainage floral tube 1, offer a plurality of through holes 5.Drainage floral tube 1 is inserted into dewatering well well casing bottom.Cover plate 3 is for shutoff dewatering well well casing mouth.In the present embodiment, this plugging device also comprises drainage pump or the mudjack being connected with aqueduct 2.
As shown in Fig. 4 to Fig. 5, the utility model also provides a kind of foundation pit dewatering well decompression type method for blocking, and it comprises the following steps:
1) at two seal rings 8 of dewatering well well casing 6 outer wall welding, the reinforcing bar of base arrangement colligation and steel well casing 6 are overlapped, and reserve a groove 9 around at well casing 6, as the operating space of well casing shutoff, when underplate concrete is built, well casing 6 outer walls are shut;
2) at described well casing 6 outer wall bottom board concrete sevens;
3) until basement bottom board concrete seven, reach after intensity, cut off unnecessary well casings more than groove 9 bottom surfaces, and insert a drainage floral tube 1 to well casing 6 bottoms, offer a plurality of through holes 5 on the bottom sidewall of drainage floral tube 1, the top of drainage floral tube 1 communicates with aqueduct 2.The top of drainage floral tube 1 is provided with stop valve 4;
4) until concrete strength, reach more than 70% and foundation ditch internal construction construction meets and starts shut-in well while stopping precipitation condition, suction pump (not shown) in dewatering well well casing 6 is proposed, start described drainage pump 11(uses when the water yield is larger) draining, the water of swarming in pipe is drained in time, again shut-in well material is inserted successively to dewatering well well casing, first insert thick material 13, insert again thin material 14, insert subsequently the clay ball 15 of 2 meters of left and right thicknesses to base plate 7 bottoms, insert again pea gravel concreten 17 after finally base plate 7 bottoms to the mouth of pipe first being inserted to dry cement 16;
5) stop drainage pump 11 work, allow a small amount of water burst flow out voluntarily from drainage floral tube 1;
6) close the stop valve 4 on drainage floral tube 1 top, by aqueduct 2 access mudjacks 12.Open stop valve, can start mudjack 12 is pressed into the curing compound such as cement grout, water glass liquid in dewatering well well casing 6 by drainage floral tube 1, curing compound is penetrated in the material gap of filling in dewatering well, to reach the closely knit effect of shut-in well, guarantee the water resistance of underground structure;
7) cut off at the position 18 of drainage floral tube 1 being exposed to bottom plate groove ground, and the consolidation liquid at cleaning mouth of pipe place, uses the cover plate 3 with well casing corresponding specification size, and the welding of well casing mouth is shut.Use again high-strength concrete 19 shutoff well casings reserved bottom plate groove 9 around, so far complete the shutoff (as shown in Figure 5) of steel well casing dewatering well.
embodiment bis-
Dewatering well well casing in the present embodiment is concrete pipe.
Foundation pit dewatering well decompression type plugging device and the embodiment mono-of the present embodiment are roughly the same, and difference is that described plugging device also comprises that water string 20(as shown in Figure 6).Water string 20 is sheathed on the top of concrete well.The outer wall of water string 20 is provided with two seal rings 21, and the top of water string 20 is connected with flange, and this flange is connected with flange plate 3.Between the flange on water string 20 tops and cover plate 3, be provided with sealing ring 22.The diameter of water string 20 is determined according to the diameter of dewatering well, generally than the large 200mm of dewatering well well casing diameter left and right.
As Fig. 6 shows, the utility model also provides a kind of foundation pit dewatering well decompression type method for blocking, and it comprises the following steps:
1) before base plate 7 construction, dewatering well well casing 6 is torn open to 250-350mm on bottom cushion, outside dewatering well well casing 6, put water string 20 and reinforce pre-buried;
2) the complete water string 20 of imbedding afterwards of foundation ditch cushion construction, and with baseplate reinforcing bar by being welded and fixed, build in sole plate concrete, the suction pump (not shown) in dewatering well is recovered to proceed precipitation, at water string 20 outer walls, two seal rings 21 is set;
3) until basement bottom board concrete, reach after intensity, cut off the base plate 7 upper unnecessary well casings in surface, and insert a drainage floral tube 1 to well casing bottom, on the bottom sidewall of described drainage floral tube 1, offer a plurality of through holes 5, the top of described drainage floral tube 1 communicates with an aqueduct 2, and the top of described drainage floral tube 1 is provided with stop valve 4;
4) until concrete strength, reach more than 70% and foundation ditch internal construction construction meets while stopping precipitation condition, start shut-in well, suction pump in dewatering well well casing 6 is proposed, again shut-in well material is inserted successively to dewatering well well casing 6, first insert thick material 13, insert again thin material 14, insert subsequently the clay ball 15 of 2 meters of left and right thicknesses to base plate 7 bottoms, insert again pea gravel concreten 17 after finally base plate 7 bottoms to the mouth of pipe first being inserted to dry cement 16;
5) the middle seal washer 22 that adds of flange with water string 20 by flange plate 3, again two flanges are passed through to bolt tightening, allow a small amount of water burst flow out (water of outflow is got rid of ground by suction pump) voluntarily from drainage floral tube 1, close the stop valve 4 of plugging device, access mudjack 12.Open stop valve 4, can start mudjack 12 is pressed into the curing compound such as cement grout, water glass liquid in dewatering well well casing 6 by drainage floral tube 1, curing compound is penetrated in the material gap of filling in dewatering well, to reach the closely knit effect of shut-in well, guarantee the water resistance of underground structure;
7) cut off at the position 18 of drainage floral tube 1 being exposed to backplate surface, adopts subsequently 19 pairs of well heads of high-strength concrete material to cover sealing, so far completes the shutoff of dewatering well.
Be understandable that, when current are larger, can after the proposition suction pump in step 4), increase the step that drainage pump is connected and draws water with aqueduct, and then shut-in well material is shunt in a well.
It should be noted that, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not depart from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (5)
1. a foundation pit dewatering well decompression type plugging device, it is characterized in that, it comprises drainage floral tube, the aqueduct communicating with described drainage floral tube top, the cover plate that is sheathed on described drainage floral tube outer wall, the top of described drainage floral tube is provided with stop valve, on the bottom sidewall of described drainage floral tube, offer a plurality of through holes, described drainage floral tube is inserted into dewatering well well casing bottom, and described cover plate is for shutoff dewatering well well casing mouth.
2. plugging device as claimed in claim 1, is characterized in that, described plugging device also comprises drainage pump or the mudjack being connected with described aqueduct.
3. plugging device as claimed in claim 1, is characterized in that, described dewatering well well casing is concrete well or steel well casing.
4. plugging device as claimed in claim 3, it is characterized in that, when described dewatering well well casing is concrete well, described plugging device also comprises water string, described water string is sheathed on the top of described concrete well, the outer wall of described water string is provided with at least one seal ring, and described water string is connected by flange with described cover plate.
5. plugging device as claimed in claim 3, is characterized in that, when described dewatering well well casing is steel well casing, described dewatering well well casing outer wall arranges at least one seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320405256.1U CN203429649U (en) | 2013-07-09 | 2013-07-09 | Pressure reducing type blocking device of foundation pit dewatering well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320405256.1U CN203429649U (en) | 2013-07-09 | 2013-07-09 | Pressure reducing type blocking device of foundation pit dewatering well |
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| CN203429649U true CN203429649U (en) | 2014-02-12 |
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| CN201320405256.1U Expired - Lifetime CN203429649U (en) | 2013-07-09 | 2013-07-09 | Pressure reducing type blocking device of foundation pit dewatering well |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264700A (en) * | 2014-10-09 | 2015-01-07 | 安徽华力建设集团有限公司 | Seepage prevention construction method for light-weight precipitation well point post-cast strip of underground construction |
| CN104895098A (en) * | 2015-06-24 | 2015-09-09 | 江苏省建筑科学研究院有限公司 | Piping blocking structure outside deep foundation pit underground diaphragm wall and grouting treatment method thereof |
| CN105780792A (en) * | 2016-04-12 | 2016-07-20 | 中南勘察设计院（湖北）有限责任公司 | Well plugging method and well plugging structure of high water head relief dewatering well in foundation pit |
| CN106400823A (en) * | 2016-09-23 | 2017-02-15 | 中建八局第四建设有限公司 | Reserved well plugging method |
| CN109083176A (en) * | 2018-07-19 | 2018-12-25 | 中建三局集团有限公司 | A kind of design has the local Yield rainfall relation system of auxiliary slip casting function |
| CN110528546A (en) * | 2019-08-09 | 2019-12-03 | 天津建工城市建设发展有限公司 | Bottom plate plugging dewatering well construction method is worn in a kind of foundation pit |
| CN111254961A (en) * | 2020-02-21 | 2020-06-09 | 云南建投第六建设有限公司 | Closed construction method for foundation pit relief well |
| CN113216198A (en) * | 2021-06-02 | 2021-08-06 | 上海兴怡基础工程有限公司 | Well sealing method for relief well of foundation pit large bottom plate |
| CN115233716A (en) * | 2022-08-22 | 2022-10-25 | 广州地铁设计研究院股份有限公司 | Permeable stratum foundation pit dynamic dewatering system |
| CN115247426A (en) * | 2022-09-08 | 2022-10-28 | 中建八局第二建设有限公司 | Pipe well dewatering device capable of reducing water seepage of bottom plate and well sealing construction method |
-
2013
- 2013-07-09 CN CN201320405256.1U patent/CN203429649U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264700A (en) * | 2014-10-09 | 2015-01-07 | 安徽华力建设集团有限公司 | Seepage prevention construction method for light-weight precipitation well point post-cast strip of underground construction |
| CN104895098A (en) * | 2015-06-24 | 2015-09-09 | 江苏省建筑科学研究院有限公司 | Piping blocking structure outside deep foundation pit underground diaphragm wall and grouting treatment method thereof |
| CN105780792A (en) * | 2016-04-12 | 2016-07-20 | 中南勘察设计院（湖北）有限责任公司 | Well plugging method and well plugging structure of high water head relief dewatering well in foundation pit |
| CN106400823A (en) * | 2016-09-23 | 2017-02-15 | 中建八局第四建设有限公司 | Reserved well plugging method |
| CN109083176A (en) * | 2018-07-19 | 2018-12-25 | 中建三局集团有限公司 | A kind of design has the local Yield rainfall relation system of auxiliary slip casting function |
| CN109083176B (en) * | 2018-07-19 | 2020-12-25 | 中建三局集团有限公司 | Local dewatering and draining system with auxiliary grouting function |
| CN110528546A (en) * | 2019-08-09 | 2019-12-03 | 天津建工城市建设发展有限公司 | Bottom plate plugging dewatering well construction method is worn in a kind of foundation pit |
| CN111254961A (en) * | 2020-02-21 | 2020-06-09 | 云南建投第六建设有限公司 | Closed construction method for foundation pit relief well |
| CN113216198A (en) * | 2021-06-02 | 2021-08-06 | 上海兴怡基础工程有限公司 | Well sealing method for relief well of foundation pit large bottom plate |
| CN115233716A (en) * | 2022-08-22 | 2022-10-25 | 广州地铁设计研究院股份有限公司 | Permeable stratum foundation pit dynamic dewatering system |
| CN115247426A (en) * | 2022-09-08 | 2022-10-28 | 中建八局第二建设有限公司 | Pipe well dewatering device capable of reducing water seepage of bottom plate and well sealing construction method |
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Granted publication date: 20140212 |
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