CN201326176Y - Deep foundation pit dewatering retention well - Google Patents
Deep foundation pit dewatering retention well Download PDFInfo
- Publication number
- CN201326176Y CN201326176Y CNU2008201571255U CN200820157125U CN201326176Y CN 201326176 Y CN201326176 Y CN 201326176Y CN U2008201571255 U CNU2008201571255 U CN U2008201571255U CN 200820157125 U CN200820157125 U CN 200820157125U CN 201326176 Y CN201326176 Y CN 201326176Y
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- precast concrete
- foundation pit
- well
- well casing
- deep foundation
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Abstract
The utility model relates to the technical field of constructional engineering, in particular to a deep foundation pit dewatering retention well, which comprises a precast concrete well casing, gravels, breathable interlayer materials, a well, a sealing steel plate with two holes, a compression tube and a water outlet tube, wherein the wall of the precast concrete well casing is provided with holes, the gravels are placed in the precast concrete well casing, the breathable interlayer materials are coated outside the wall of the precast concrete well casing, the well is arranged in a soil layer, the precast concrete well casing which is equipped with the gravels inside and coated with the breathable interlayer materials outside is placed in the well, the sealing steel plate with two holes seals the upper end of the precast concrete well casing, the compression tube and the water outlet tube respectively penetrate through the two holes of the sealing steel plate, the lower ends of the compression tube and the water outlet tube are all placed in the precast concrete well casing, and further, the compression tube, the water outlet tube and the two holes are sealed. The utility model has the advantages that the deep foundation pit dewatering retention well is simple and convenient in water pumping, does not affect binding of bottom plate reinforcing steel bars, is simple in well sealing and more economical, and effectively prevents water leakage.
Description
Technical field
The utility model relates to a kind of deep foundation pit precipitation well of construction engineering technical field.
Background technology
Deep pit digging is the important construction sequence of modern large underground structure, dewatering also is called groundwater control in the foundation ditch, promptly underground water will satisfy the requirement of supporting and protection structure and excavation and construction in Foundation Pit Construction, and the variation because of the following peripheral, ground does not bring harm to environment and facility around the foundation ditch, and the therefore general mode of deep-well well point dewatering that adopts solves this type of technical problem.
Usually, after cheat the end, conventional method is that former precipitation deep-well well casing is directly kept at excavation of foundation pit, treat that the base plate construction is finished and the bottom plate rear pouring tape sealing after shunt in a well again.
About 3.4 ten thousand square metres of Shanghai City Luwan District the 55th neighbour's engineering foundation ditch area, cutting depth 17.5m～20.6m, foundation ditch arrange precipitation drainage Jing169Kou altogether.Excavation of foundation pit needs to keep 50 mouthfuls of wells and continues to sluice after cheat the end.The deep-well wall casing all adopts diameter phi 273mm welded steel pipe, if directly keep somewhere according to a conventional method, the base plate reinforcing bar can be blocked in a large number, and a large amount of steel pipes will forever be imbedded underground, and is economical inadequately.In addition, meet well in the construction of base plate reinforcing bar binding and the base plate reinforcing bar can only be blocked and takes reinforcement measure.And after structure is finished, also be easy to produce seepage inside and outside the pipe of indwelling well point.
The utility model content
For addressing the above problem, the utility model provides a kind of deep foundation pit precipitation of construction engineering technical field to keep well, comprising: the precast concrete well casing, and its tube wall has hole; Gravel places in the described precast concrete well casing; Ventilative interlayer material is wrapped in the described precast concrete well casing tube wall outside; Wellhole is located in the soil layer; The precast concrete well casing of the ventilative interlayer material of described built-in gravel outsourcing places described wellhole; Closure plate with two perforates is sealed the upper end of described precast concrete well casing; Forcing pipe and outlet pipe pass two perforates of described sealing steel plate respectively, and its lower end all places in the described precast concrete well casing, and seal between described forcing pipe and outlet pipe and the described perforate.
Deep foundation pit precipitation described in the utility model keeps well and has following characteristics:
1. when drawing water, only need with common air compressor machine from the forcing pipe aerating, outlet pipe will water outlet;
2. the concrete pipe cost is more more economical than steel tube well;
3. do not influence the base plate reinforcing bar binding;
4. shut-in well is very simple, only need close the outlet pipe valve earlier, carries out slip casting (microdilatancy) from forcing pipe, reach certain pressure after, open the outlet pipe valve, flow out to the outlet pipe slurries and get final product, and close two valves.Treating that big underplate concrete whole casting layer waters when smashing covers the below with valve, can effectively prevent infiltration.
5. common precipitation is aboveground to have circular hole can't weld the sealing sheet, and this type of keeps aboveground no any space, can weld twice sealing sheet, has reduced the possibility of well casing infiltration greatly.
For above-mentioned feature and advantage of the present utility model can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
The deep foundation pit precipitation that Figure 1 shows that the utility model one embodiment keeps the well construction schematic diagram.
The specific embodiment
In order more to understand technology contents of the present utility model, especially exemplified by specific embodiment and cooperate appended graphic being described as follows.
As shown in Figure 1, Fig. 1 is the deep foundation pit precipitation reservation well construction schematic diagram of the utility model one embodiment.Precast concrete well casing 1, its tube wall have the hole by plum blossom shape cloth hole.Gravel 2 places in the precast concrete well casing 1.Two-layer nonwoven is wrapped in the tube wall outside of precast concrete well casing 1 as ventilative interlayer material 3.Wellhole 4 is located in the soil layer.The precast concrete well casing 1 of the ventilative interlayer material 3 of built-in gravel 2 outsourcings places wellhole 4.Upper end with sealing steel plate 6 sealing precast concrete well casings 1 of two perforates 5.Sealing steel plate 6 also can replace with cement board in the utility model.Forcing pipe and outlet pipe pass two perforates 5 of sealing steel plate respectively, and its lower end all places in the precast concrete well casing 1, and sealing between forcing pipe 7 and outlet pipe 8 and the perforate 5.Forcing pipe 7 places the outlet pipe 8 that is shorter in length than in the precast concrete well casing 1 to place length in the precast concrete well casing 1.
In the utility model embodiment, the top of sealing steel plate 6 can also be coated with bed course 9 and big base plate 10, and the upper end of forcing pipe 7 can be provided with valve 11.
In the utility model embodiment, forcing pipe and the outlet pipe tube wall outside is welded with all that 2 road 4mm are thick, the wide steel plate water-stopping ring plate 13,14 of 50mm, can effectively prevent the outer lateral seepage of tube wall.
In the utility model embodiment, when drawing water, only need with common air compressor machine from forcing pipe 7 aeratings, outlet pipe 8 will water outlet; During shut-in well, first valve-off 12 only needs carry out slip casting (microdilatancy) from forcing pipe 7, and after waiting to reach certain pressure, Open valve 12 flows out to outlet pipe 8 slurries and to get final product, and valve-off 11,12.Treating that the concrete whole casting layer waters when smashing covers the below with valve 11,12, can effectively prevent infiltration.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; have in the technical field under any and know the knowledgeable usually; in not breaking away from spirit and scope of the present utility model; when doing a little change and retouching, therefore protection domain of the present utility model is as the criterion when looking claims person of defining.
Claims (10)
1, a kind of deep foundation pit precipitation keeps well, it is characterized in that, comprising:
The precast concrete well casing, its tube wall has hole;
Gravel places in the described precast concrete well casing;
Ventilative interlayer material is wrapped in the described precast concrete well casing tube wall outside;
Wellhole is located in the soil layer;
The precast concrete well casing of the ventilative interlayer material of described built-in gravel outsourcing places described wellhole;
Closure plate with two perforates is sealed the upper end of described precast concrete well casing;
Forcing pipe and outlet pipe pass two perforates of described sealing steel plate respectively, and its lower end all places in the described precast concrete well casing, and seal between described forcing pipe and outlet pipe and the described perforate.
2, deep foundation pit precipitation according to claim 1 keeps well, it is characterized in that, also comprise described sealing steel plate above be coated with bed course.
3, deep foundation pit precipitation according to claim 1 keeps well, it is characterized in that, comprises that also the upper end of described forcing pipe is provided with valve.
4, deep foundation pit precipitation according to claim 1 keeps well, it is characterized in that the tube wall of described precast concrete well casing has the hole by plum blossom shape cloth hole.
5, deep foundation pit precipitation according to claim 1 keeps well, it is characterized in that described ventilative interlayer material is a nonwoven.
6, deep foundation pit precipitation according to claim 5 keeps well, it is characterized in that described nonwoven is two-layer.
7, deep foundation pit precipitation according to claim 1 keeps well, it is characterized in that described closure plate is a steel plate.
8, deep foundation pit precipitation according to claim 1 keeps well, it is characterized in that described closure plate is a cement board.
9, deep foundation pit precipitation according to claim 1 keeps well, it is characterized in that, described forcing pipe places the described outlet pipe that is shorter in length than in the described precast concrete well casing to place the interior length of described precast concrete well casing.
10, deep foundation pit precipitation according to claim 1 keeps well, it is characterized in that, it is thick that the described forcing pipe and the outlet pipe tube wall outside all are welded with 2 road 4mm, the wide steel plate water-stopping ring plate of 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201571255U CN201326176Y (en) | 2008-12-15 | 2008-12-15 | Deep foundation pit dewatering retention well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201571255U CN201326176Y (en) | 2008-12-15 | 2008-12-15 | Deep foundation pit dewatering retention well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201326176Y true CN201326176Y (en) | 2009-10-14 |
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ID=41178150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201571255U Expired - Fee Related CN201326176Y (en) | 2008-12-15 | 2008-12-15 | Deep foundation pit dewatering retention well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201326176Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162253A (en) * | 2011-05-07 | 2011-08-24 | 山东新城建工股份有限公司 | Precipitation construction method employing pipe embedding in deep foundation pits |
| CN102644291A (en) * | 2012-04-10 | 2012-08-22 | 广东金辉华集团有限公司 | Foundation pit precast concrete pipe immersed-tube precipitation structure and precipitation method |
| CN103147450A (en) * | 2013-03-19 | 2013-06-12 | 成军 | Construction method for plugging partial steel pipe dewatering well by using flange plates for excavation of deep foundation pit |
| CN110144918A (en) * | 2019-05-22 | 2019-08-20 | 四川童燊防水工程有限公司 | Hypogee dewatering well antiseepage plugging construction method |
-
2008
- 2008-12-15 CN CNU2008201571255U patent/CN201326176Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162253A (en) * | 2011-05-07 | 2011-08-24 | 山东新城建工股份有限公司 | Precipitation construction method employing pipe embedding in deep foundation pits |
| CN102162253B (en) * | 2011-05-07 | 2012-09-19 | 山东新城建工股份有限公司 | Precipitation construction method employing pipe embedded in deep foundation pits |
| CN102644291A (en) * | 2012-04-10 | 2012-08-22 | 广东金辉华集团有限公司 | Foundation pit precast concrete pipe immersed-tube precipitation structure and precipitation method |
| CN102644291B (en) * | 2012-04-10 | 2014-08-27 | 广东金辉华集团有限公司 | Foundation pit precast concrete pipe immersed-tube precipitation structure and precipitation method |
| CN103147450A (en) * | 2013-03-19 | 2013-06-12 | 成军 | Construction method for plugging partial steel pipe dewatering well by using flange plates for excavation of deep foundation pit |
| CN110144918A (en) * | 2019-05-22 | 2019-08-20 | 四川童燊防水工程有限公司 | Hypogee dewatering well antiseepage plugging construction 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: 20091014 Termination date: 20161215 |