CN203514331U - Large-aperture deep well point dewatering system arranged outside foundation pit - Google Patents
Large-aperture deep well point dewatering system arranged outside foundation pit Download PDFInfo
- Publication number
- CN203514331U CN203514331U CN201320525185.9U CN201320525185U CN203514331U CN 203514331 U CN203514331 U CN 203514331U CN 201320525185 U CN201320525185 U CN 201320525185U CN 203514331 U CN203514331 U CN 203514331U
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- China
- Prior art keywords
- well
- pipe
- foundation ditch
- well point
- dewatering system
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- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000009412 basement excavation Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 19
- 238000001556 precipitation Methods 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model provides a large aperture deep-well point dewatering system of setting outside foundation ditch, includes well point pipe, water pump, drainage branch pipe and main drainage pipe, well point pipe inserts in the well hole, it inserts intraductally in the well point to drain, and its tip that stretches into well point pipe is connected with the water pump, and its other end and main drainage pipe are connected, well point pipe is arranged in the periphery of planning the excavation foundation ditch, all is provided with the valve between each drainage branch pipe and the main drainage pipe, the closed circle that encircles the periphery of planning the excavation foundation ditch that the main drainage pipe connects into gathers to the main drainage pipe, the main drainage pipe outlet end of catchmenting inserts the fire-fighting cistern. The utility model discloses easy maintenance, the efficiency of construction is high, does not influence the earlier stage construction in the foundation ditch, and is energy-concerving and environment-protective, but wide application has the foundation ditch precipitation construction at large-scale water source around the job site.
Description
Technical field
The utility model relates to the precipitation system in a kind of foundation pit construction, particularly a kind of big diameter and deep well-points dewatering system being arranged on outside foundation ditch.
Background technology
Deep well point dewatering construction technology is a common technology in building foundation pit construction, but under different geological conditionss, the concrete operations of dewatering construction have very large difference, especially construction plant groundwater table is high, and be connected with large-scale water sources such as near river, river, Hu Hai, and in the time of stronger with near the complementarity at large-scale water source, the difficulty of well-points dewatering is just very large.Conventional precipitation system is that precipitation well point is arranged in plan excavation pit at present, all extraction drainings are in charge of and are all collected to leader drain and enclose in closed circle, unification arranges a by-pass valve control, the advantage of this precipitation system is that precipitation system installation is simple, can realize fast the decline of Water Level in Foundation Pit; Shortcoming is that precipitation well point is arranged in foundation ditch, and the construction in foundation ditch can only wait precipitation to finish to start, if the duration is nervous, will increase the duration pressure in later stage; In addition, for the more situation of precipitation well point, a by-pass valve control is simply set, once a dewatering well goes wrong, whole precipitation system all must quit work, and takes time and effort.In water source or gutter near the underground water that well-points dewatering is extracted normally simply enters, cannot realize effective utilization of underground water.
Utility model content
The purpose of this utility model is to provide a kind of big diameter and deep well-points dewatering system being arranged on outside foundation ditch, solve the follow-up construction of impact of existing foundation pit dewatering, in Precipitation Process, keep in repair inconvenient technical problem, solve the technical problem of the energy-conserving and environment-protective construction in foundation pit construction simultaneously.
For achieving the above object, the utility model adopts following technical scheme:
A kind of big diameter and deep well-points dewatering system being arranged on outside foundation ditch, comprise well-point pipe, water pump, draining is in charge of and leader drain, described well-point pipe inserts in wellhole, described draining is in charge of in insertion well-point pipe, its end of stretching into well-point pipe is connected with water pump, its other end is connected with leader drain, described well-point pipe is arranged in the periphery of intending excavation pit, each draining be in charge of and leader drain between be provided with valve, the closure circle of the periphery around plan excavation pit that described leader drain connects into also gathers to water header, described water header water side access fire-fighting reservoir.
The bottom surface of described well-point pipe is surrounded by screen pack.
Described well-point pipe is plastic film capicitor.
Described draining is in charge of for pvc pipe.
Described leader drain is threaded steel pipe or seamless steel pipe.
Compared with prior art the utlity model has following characteristics and beneficial effect:
By in each draining, be in charge of and leader drain between valve is set, in the time of can guaranteeing to break down in any one well point, only need close this well point, can normally work in other well points, improved efficiency of construction, ensured the construction period.
Adopt deep-well precipitation system described in the utility model, can effectively reduce groundwater table, for foundation construction provides necessary guarantee, meanwhile, because dewatering well is all arranged on outside foundation ditch, do not affect the construction in place.
In addition, this precipitation system, focuses on the water of extracting out from stratum in water for fire fighting pond, has realized energy-saving and emission-reduction, environmental protection construction.
The utility model can be widely used in the foundation pit dewatering construction that job site has large-scale water source around.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail.
Fig. 1 is well-points dewatering system well point layout schematic diagram.
Fig. 2 is the A-A sectional view of Fig. 1.
Reference numeral: 1-intends that excavation pit, 2-fire-fighting reservoir, 3-draining are in charge of, 4-well-point pipe, 5-water pump, 6-valve, 7-leader drain, 8-screen pack, 9-water header, 10-are observed well.
The specific embodiment
Embodiment is referring to shown in Fig. 1 and Fig. 2, a kind of big diameter and deep well-points dewatering system being arranged on outside foundation ditch, comprise well-point pipe 4, water pump 5, draining is in charge of 3 and leader drain 7, described well-point pipe 4 inserts in hoistway, described draining is in charge of in 3 insertion well-point pipes 4, its end of stretching into well-point pipe 4 is connected with water pump 5, its other end is connected with leader drain 7, described well-point pipe 4 is arranged in the periphery of intending excavation pit 1, each draining be in charge of 3 and leader drain 7 between be provided with valve 6, the closure circle of the periphery around plan excavation pit 1 that described leader drain 7 connects into also gathers to water header 9, described water header 9 water side access fire-fighting reservoirs 2.
The bottom surface of described well-point pipe 4 is surrounded by screen pack 8.
Described well-point pipe 4 is plastic film capicitor.
Described draining is in charge of 3 for pvc pipe.
Described leader drain 7 is threaded steel pipe or seamless steel pipe.
Preferably, can consider every 100m, to establish a manual gate to occur that in work progress surprisingly (as haul vehicle, loader, trenching machine break) is convenient to timely repairing at leader drain.The about 1000m of length of every section of leader drain.
1) technological process
Well point measurement and positioning → dig a well mouthful, Hospice Center's cylinder → rig be in place → and boring → backfill shaft bottom sand cushion → hang divides into water pump, the complete well-point pipe → shut-in well that pulls out of installation pumping control circuit → examination normally work → precipitation of draw water → dewatering well in the gravel filtration beds → well-flushing → well casing between well casing → backfill well casing and hole wall, in the present embodiment, press the about 15m of well spacing, well depth 22m, well head aperture φ 500mm, leader drain caliber φ 325mm, draining is in charge of caliber φ 300mm and is arranged.
2) main points of operation
(1) excavation of foundation pit
First according to excavation of foundation pit sideline, carrying out the first step fetches earth, 2 the observation wells 10 of first constructing while fetching earth for the first time, the effect of observing well 10 is the speed of checking groundwater table and observing precipitation below, fetch earth as pit earthwork being excavated to the above 0.2m of phreatic line place, and carry out the support work of excavation slope.
(2) location, well point
Position: according to well location and the on-site actual situations of design, accurately make each well location and put, and carry out mark.
(3) well point construction
1) adopt rig.Aperture is generally 600mm, and with mud off, aperture arranges casing, in case aperture landslide, and establish gutter, mud sump in a side.
2) clear hole immediately after pore-forming, and well-point pipe is installed.After well-point pipe is lowered to, the chimney filter of well-point pipe part should be placed in the proper range in aquifer, and fills gravel filtrate between well-point pipe and hole wall.
3) install before water pump, by compressed air well-flushing method, clean filter well, rush dedusting slag, until the water of discharging in water header is clear by muddy change, till reaching normal water yield.
4) after water pump is installed, water pump itself and control system are done once to comprehensive careful inspection, try to draw water after qualified, after meeting the demands, proceed to normal work.
5) WATER LEVEL CHANGES in observation well, performs detailed record.
Claims (5)
1. the big diameter and deep well-points dewatering system being arranged on outside foundation ditch, comprise well-point pipe (4), water pump (5), (3) and leader drain (7) are in charge of in draining, described well-point pipe (4) inserts in wellhole, described draining is in charge of (3) and is inserted in well-point pipe (4), its end of stretching into well-point pipe (4) is connected with water pump (5), its other end is connected with leader drain (7), it is characterized in that: described well-point pipe (4) is arranged in the periphery of intending excavation pit (1), each draining is in charge of between (3) and leader drain (7) and is provided with valve (6), the closure circle of the periphery around plan excavation pit (1) that described leader drain (7) connects into also gathers to water header (9), described water header (9) water side access fire-fighting reservoir (2).
2. the big diameter and deep well-points dewatering system being arranged on outside foundation ditch according to claim 1, is characterized in that: the bottom surface of described well-point pipe (4) is surrounded by screen pack (8).
3. the big diameter and deep well-points dewatering system being arranged on outside foundation ditch according to claim 1, is characterized in that: described well-point pipe (4) is plastic film capicitor.
4. the big diameter and deep well-points dewatering system being arranged on outside foundation ditch according to claim 1, is characterized in that: described draining is in charge of (3) for pvc pipe.
5. the big diameter and deep well-points dewatering system being arranged on outside foundation ditch according to claim 1, is characterized in that: described leader drain (7) is threaded steel pipe or seamless steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320525185.9U CN203514331U (en) | 2013-08-27 | 2013-08-27 | Large-aperture deep well point dewatering system arranged outside foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320525185.9U CN203514331U (en) | 2013-08-27 | 2013-08-27 | Large-aperture deep well point dewatering system arranged outside foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203514331U true CN203514331U (en) | 2014-04-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320525185.9U Expired - Fee Related CN203514331U (en) | 2013-08-27 | 2013-08-27 | Large-aperture deep well point dewatering system arranged outside foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203514331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060636A (en) * | 2014-05-22 | 2014-09-24 | 中国建筑第四工程局有限公司 | Depressurization and anti-floating method and device thereof for foundation construction in high water level region building |
-
2013
- 2013-08-27 CN CN201320525185.9U patent/CN203514331U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060636A (en) * | 2014-05-22 | 2014-09-24 | 中国建筑第四工程局有限公司 | Depressurization and anti-floating method and device thereof for foundation construction in high water level region building |
| CN104060636B (en) * | 2014-05-22 | 2016-06-22 | 中国建筑第四工程局有限公司 | Pressure release anti-float method during high water level regional architecture foundation construction and device |
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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 |
Granted publication date: 20140402 Termination date: 20140827 |
|
| EXPY | Termination of patent right or utility model |