CN203463029U - Well pipe structure - Google Patents
Well pipe structure Download PDFInfo
- Publication number
- CN203463029U CN203463029U CN201320544052.6U CN201320544052U CN203463029U CN 203463029 U CN203463029 U CN 203463029U CN 201320544052 U CN201320544052 U CN 201320544052U CN 203463029 U CN203463029 U CN 203463029U
- Authority
- CN
- China
- Prior art keywords
- pipe
- well
- vacuum
- ground
- well casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a well pipe structure. The well pipe structure is characterized by comprising two parts of a ground pipe (1) and an underground pipe (2), wherein the ground pipe (1) is connected with the underground pipe (2) through a flange plate and a bolt; a sealing plate (3) is arranged at the pipe orifice of the ground pipe (1); a vacuum meter (4), a water exhausting pipe (5) and a vacuum pumping connector (6) are arranged on the sealing plate; the underground pipe (2) sequentially consists of a vacuum section (7), a filtering section (8) and a precipitation section (9) from the top to the bottom. The well pipe structure adopts sectional well pipes, so that the water permeation effect is guaranteed, and meanwhile, air is prevented from entering a superstrong-vacuum dewatering well to avoid the defect of vacuum degree attenuation caused by the air entering the well after the water level of a general vacuum deep well is dropped, and in the dewatering period, the dewatering effect can be largely improved, the engineering cost is reduced, the engineering progress is quickened, and the labor intensity is relieved; the technique is easy to operate and master.
Description
Technical field
the utility model relates to a kind of well casing structure, and particularly a kind of well casing structure for superpower vacuum-dewatering well construction method, belongs to building operations precipitation technical field.
Background technology
in the fast development process of urban construction, the Application and Development of the underground spaces such as building basement, underground store and subway station is more and more, and the degree of depth is increasing, like this degree of depth of precipitation and requirement is also further improved.
existing vacuum-dewatering technology has air and enters in vacuum deep well after water level declines, and can cause vacuum decay, thereby reduce dewatering effect.Therefore existing precipitation technology is all not fully up to expectations in use and effect.
Summary of the invention
the purpose of this utility model is, a kind of well casing structure is provided, and can significantly improve dewatering project effect, reduce engineering cost, speed up the work, alleviate the good result of labor strength, and technological operation is simple, easily grasps.To overcome the deficiencies in the prior art.
the technical solution of the utility model:
a well casing structure, comprises pipe and buried pipe two parts on the ground, and pipe is connected with buried pipe with bolt by flange on the ground, and the mouth of pipe of pipe is provided with shrouding on the ground, and shrouding is provided with vacuum meter, gutter and vacuumizes interface; Buried pipe is respectively vacuum zone, fillter section and precipitating phase from top to bottom.
in aforementioned well casing structure, on the well casing of described fillter section, be evenly equipped with filter bores, filter bores is provided with screen pack outward, is provided with suction pump and fluid level controller in the pipe of fillter section, and suction pump is connected with gutter.
compared with prior art, the utility model adopts segmented well casing, when ensureing permeable effect, completely cut off air and entered in superpower vacuum drop well, avoided conventional vacuum deep-well after water level declines because air enters the defect that causes vacuum decay in well, when precipitation, can significantly improve dewatering effect, reduce engineering cost, speed up the work, alleviate the good result of labor strength, and technological operation is simple, easily grasps.
Accompanying drawing explanation
fig. 1 is fundamental diagram of the present utility model;
fig. 2 is negative pressure design sketch of the present utility model;
fig. 3 is the utility model course of work schematic diagram;
fig. 4 is the utility model well casing structural representation used;
fig. 5 is workflow block diagram of the present utility model.
being labeled as in accompanying drawing: 1-manages on the ground, 2-buried pipe, 3-shrouding, 4-vacuum meter, 5-gutter, 6-vacuumize interface, 7-vacuum zone, 8-fillter section, 9-precipitating phase, 10-filter bores, 11-well casing, 12-screen pack, 13-suction pump, 14-fluid level controller, 15-phreatic line, 16-vacuum pump, 17-exhaust tube, 18-drinking-water pipe, 19-valve, 20-mud pit, 21-filtrate.
The specific embodiment
below in conjunction with accompanying drawing, the utility model is described in further detail, but not as to any restriction of the present utility model.
the utility model is constructed according to following a kind of superpower vacuum-dewatering well construction method, and the method is constructed by following technological process: slurry → lower well casing → enclose and fill out filtrate → well-flushing is changed in measuring well location → bury underground retaining pipe → rigging up → one-tenth well construction → drilling and forming hole → clear hole.While burying retaining pipe underground, at the bottom of retaining pipe, mouth inserts in original state soil layer, and pipe external application cohesive soil or straw band are obturaged, retaining pipe top 0.10m～0.30m above ground level.While becoming well construction, construction equipment is selected GPS-10 type engineering driller and corollary equipment thereof; Pore-forming adopts normal circulation slewing drilling machine to enter the pore-forming technique of mud off.During drilling and forming hole, top is crept into and is adopted the light slow-speed of pressing, and the pressure of the drill is 15～35KN, rotating speed 20～50rpm; When drilling tool all enters after layer of sand, suitably pressurization, improves rotating speed; Drilling construction adopts natural pulping in hole, and in drilling process, mud density is controlled at 1.10～1.15, when promoting drilling tool or stopping work, in hole, must press full mud; Mud circulation adopts mud pit to circulate.Clear hole is changed while starching, and borehole drilling proceeds to after design elevation, before carrying brill, drilling rod is carried to 0.50m at the bottom of hole, carries out foreign material in punching cleaning hole, the mud density in hole is progressively adjusted to 1.08 simultaneously, and at the bottom of hole, heavy silt is less than 30cm, till not containing clod in the mud returning out; Mud after using transports place by mud pit and processes.During lower pipe, at the upper and lower two ends of filter pipe, respectively establish the centralizer that a set of diameter is less than aperture 5cm, centralizer adopts trapezoidal iron hoop, and top and the bottom centralizer iron hoop is crisscross arranged.Enclose and fill out before filtrate, in well casing, be lowered to drilling rod to 0.30m～0.50m at the bottom of hole, well casing is suitable for reading to be added after silently sealing, from pumping mud limit in drilling rod, carrying out punching limit progressively sizes mixing and makes the mud in hole outwards in the annular gap by well casing and hole wall, return slurry in filter pipe, make the mud density in hole progressively be transferred to 1.05, then open little pump amount and insert filtrate by the structure designing requirement of well.During well-flushing, adopt piston upwards to draw from filter pipe bottom, water is pulled out to aperture, water base that pulls out when piston containing after silt particle, uses the vacuum pump well-flushing that draws water instead, heavy silt at the bottom of discharge pipe, until water is clearly containing sand, examination is pumped into merit and is represented that Cheng Jing completes.
according to said method, build and for the schematic diagram of of the present utility model a kind of well casing structure of said method as shown in Figure 4, this structure comprises manages on the ground 1 and buried pipe 2 two parts, managing 1 is on the ground connected with buried pipe 2 with bolt by flange, manage on the ground 1 the mouth of pipe and be provided with shrouding 3, shrouding is provided with vacuum meter 4, gutter 5 and vacuumizes interface 6; Buried pipe 2 is respectively vacuum zone 7, fillter section 8 and precipitating phase 9 from top to bottom.
on the well casing of above-mentioned fillter section 8, be evenly equipped with filter bores 10, filter bores 10 is outer is provided with screen pack 12, is provided with suction pump 13 and fluid level controller 14 in the pipe of fillter section 8, and suction pump 13 is connected with gutter 4.
Embodiment
during Specific construction as shown in Figure 3, with vacuum pump 16 and suction pump 13, extract air and the underground water in well casing 11 simultaneously, make the interior maintenance of well casing 11 sealing form the stable negative-pressure vacuum that continues and be not subject to the condition of high vacuum degree (being greater than 0.08MPa) that underground engineering construction affects, underground water is collected continuously and healthily under negative-pressure vacuum effect in well.Principle of the present utility model as shown in Figure 1, owing to being evacuated in well casing 11, remains a higher negative-pressure vacuum in well casing 11 bottoms, makes phreatic line 15 curved decline as shown in Figure 1, has accelerated the pore water in the soil body and has discharged.The utility model can not keep (the superpower vacuum-dewatering well depth value of L for determining according to demand) negative pressure in below ground L depth bounds to be peak suction (the arrow length in Fig. 2 represents negative pressure value) before precipitation as shown in Figure 2, and negative pressure decay starts to form from dewatering well bottom.
the utility model well casing used as shown in Figure 4, comprises and manages 1 and buried pipe 2 two parts on the ground, manage on the ground 1 with buried pipe 2 between through flange, be connected.Manage on the ground 1 the mouth of pipe and be provided with shrouding 3, shrouding is provided with vacuum meter 4, gutter 5 and vacuumizes interface 6; Buried pipe 2 is respectively vacuum zone 7, fillter section 8 and precipitating phase 9 from top to bottom.On the well casing of described fillter section 8, be evenly equipped with filter bores 10, filter bores 10 is outer is provided with screen pack 12, is provided with suction pump 13 and fluid level controller 14 in the pipe of fillter section 8, and suction pump 13 is connected with gutter 4.
technological process of the present utility model and key points for operation:
technological process as shown in Figure 5.Its operation requirements is as follows:
(1) measuring well location: according to design drawing measuring well location, should carry out well location mark after well location measuring, facilitate construction in later period.Cannot normal construction if lay well location, should link up in time, process, suitably adjust if desired well location.
(2) bury retaining pipe underground: while burying retaining pipe underground, at the bottom of retaining pipe, mouth should insert in original state soil layer, pipe outer application cohesive soil or straw band are obturaged, the outer slurry that returns of pipe while preventing from constructing, and retaining pipe top should 0.10m～0.30m above ground level.
(3) rigging up: during rigging up, in order to guarantee the verticality in hole, board should be installed firm level, hook mating holes center, hook, rotating disk Yu Kong center sight alignment, maintain strict control over perforate pass, drill bit and two drill collars of drilling rod junction band, and crooked stem must not descend in hand-hole.
(4) become well construction: construction equipment is selected GPS-10 type engineering driller and corollary equipment thereof.During pore-forming, adopt normal circulation slewing drilling machine to enter the pore-forming technique of mud off.
(5) drilling and forming hole: top is crept into and adopted the light slow-speed of pressing, and the pressure of the drill is 15～35KN, rotating speed 20～50rpm, when drill bit pierces deep soil layer, drilling tool resistance can strengthen, and progress is slow.At this moment, can not intensified pressure and rev up, in order to avoid cause hole scattering.When drilling tool all enters after layer of sand, can suitably pressurize, improve rotating speed.Drilling construction adopts natural pulping in hole, and in drilling process, mud density is controlled at 1.10～1.15, when promoting drilling tool or stopping work, must press full mud, to prevent hole wall collapse in hole.Mud circulation should circulate in mud pit, does not possess at the scene under the condition of mud pit, can consider to excavate a little mud pit and carry out mud circulation in foundation ditch.
(6) slurry is changed in clear hole: borehole drilling proceeds to after design elevation, before carrying brill, drilling rod is carried to 0.50m at the bottom of hole, carried out foreign material in punching cleaning hole, the mud density in hole is progressively adjusted to 1.08 simultaneously, at the bottom of hole, heavy silt is less than 30cm, till not containing clod in the mud returning out.Mud after using transports place by mud pit and processes.
(7) lower well casing: after well casing is marched into the arena, should check whether filter screen meets designing requirement.First must measure hole depth, and to well casing by root measure, record.Shutoff sediment tube bottom.Its less important manhole pipe welding, well casing welding point place should adopt socket type, and the long 20mm of socket box cupling, is inserted in each 10mm of upper and lower well casing; Casing coupling and well casing weld, even weld, without sand holes, and the high 6mm that is not less than of weld seam heap.After inspection, start lower well casing, lower Guan Shiwei guarantees that well casing is placed in the middle, at the upper and lower two ends of fillter section of well casing, respectively establishes the centralizer that a set of diameter is less than aperture 5cm, and centralizer adopts trapezoidal iron hoop, and top and the bottom centralizer iron hoop answers 1/2 to stagger, not on same straight line.
(8) enclose and fill out filtrate: before filling out filtrate, in well casing, be lowered to drilling rod to 0.30m～0.50m at the bottom of hole, well casing is suitable for reading should be added after shrouding sealing, from pumping mud in drilling rod, carrying out punching limit, limit progressively sizes mixing and makes the mud in hole outwards in the annular gap by well casing and hole wall, return slurry in well casing, make the mud density in hole progressively be transferred to 1.05, then open little pump amount and insert filtrate by the structure designing requirement of well, and with filling out with the height of surveying filtrate, until filtrate is down to precalculated position.While filling out filtrate, according to aperture, return regimen condition and adjust pump amount.Fill out in filtrate process and will follow the tracks of on filtrate and return highly.
(9) pressure reduction well utilizes vacuum pump on the drilling rod connecting in well casing first to draw water before proposing drilling rod, proposes drilling rod and use piston well-flushing again after the water outlet of well energy.The difference of piston diameter and well casing internal diameter is about 5mm left and right, and piston rod bottom must add valve.During well-flushing, piston must upwards draw from filter pipe bottom, and water is pulled out to aperture, to water yield well seldom can be by piston the upper and lower play of fillter section at well casing, impact mud cake on the wall of borehole, now should draw piston to well inner edge water filling limit.Water base that pulls out when piston containing after silt particle, can use the vacuum pump well-flushing that draws water instead, and heavy silt at the bottom of discharge pipe, until water is clearly containing sand.After well-flushing, examination is pumped into merit and is represented that Cheng Jing completes.
Claims (2)
1. a well casing structure, it is characterized in that: comprise pipe (1) and buried pipe (2) two parts on the ground, pipe (1) is connected with buried pipe (2) with bolt by flange on the ground, the mouth of pipe of pipe (1) is provided with shrouding (3) on the ground, and shrouding is provided with vacuum meter (4), gutter (5) and vacuumizes interface (6); Buried pipe (2) is respectively vacuum zone (7), fillter section (8) and precipitating phase (9) from top to bottom.
2. well casing structure according to claim 1, it is characterized in that: on the well casing of described fillter section (8), be evenly equipped with filter bores (10), the outer screen pack (12) that is provided with of filter bores (10), in the pipe of fillter section (8), be provided with suction pump (13) and fluid level controller (14), suction pump (13) is connected with gutter (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320544052.6U CN203463029U (en) | 2013-09-03 | 2013-09-03 | Well pipe structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320544052.6U CN203463029U (en) | 2013-09-03 | 2013-09-03 | Well pipe structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203463029U true CN203463029U (en) | 2014-03-05 |
Family
ID=50175401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320544052.6U Expired - Fee Related CN203463029U (en) | 2013-09-03 | 2013-09-03 | Well pipe structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203463029U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867188A (en) * | 2014-03-14 | 2014-06-18 | 山东石大油田技术服务股份有限公司 | Decision method used for profile control of oil-field water injection well |
| CN104060621A (en) * | 2013-09-03 | 2014-09-24 | 中国建筑第四工程局有限公司 | Construction method for super vacuum dewatering well and well tube structure used in construction method |
| CN105604076A (en) * | 2016-02-23 | 2016-05-25 | 中国水利水电第十一工程局有限公司 | Vacuum pump water-discharging device suitable for tunnel excavation |
| CN108590515A (en) * | 2018-05-09 | 2018-09-28 | 上海元易勘测设计有限公司 | High viscosity thick fill stratum forming hole method |
| CN115064049A (en) * | 2022-05-17 | 2022-09-16 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Physical model test system and method for simulation of dewatering well construction process |
-
2013
- 2013-09-03 CN CN201320544052.6U patent/CN203463029U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060621A (en) * | 2013-09-03 | 2014-09-24 | 中国建筑第四工程局有限公司 | Construction method for super vacuum dewatering well and well tube structure used in construction method |
| CN103867188A (en) * | 2014-03-14 | 2014-06-18 | 山东石大油田技术服务股份有限公司 | Decision method used for profile control of oil-field water injection well |
| CN103867188B (en) * | 2014-03-14 | 2017-03-22 | 山东石大油田技术服务股份有限公司 | Decision method used for profile control of oil-field water injection well |
| CN105604076A (en) * | 2016-02-23 | 2016-05-25 | 中国水利水电第十一工程局有限公司 | Vacuum pump water-discharging device suitable for tunnel excavation |
| CN108590515A (en) * | 2018-05-09 | 2018-09-28 | 上海元易勘测设计有限公司 | High viscosity thick fill stratum forming hole method |
| CN115064049A (en) * | 2022-05-17 | 2022-09-16 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Physical model test system and method for simulation of dewatering well construction process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104060621A (en) | Construction method for super vacuum dewatering well and well tube structure used in construction method | |
| CN203463029U (en) | Well pipe structure | |
| CN103031850B (en) | Low-permeability sludge claypan ultra-vacuum dual-pipe unwatering well and construction technology | |
| CN107237650A (en) | A kind of drilling siphon drainage system and method for being used to handle the infiltration of Tunnel wall | |
| CN111335344A (en) | Super pressure suction combined well point dewatering construction method for subway deep foundation pit | |
| CN109736338A (en) | A kind of hydraulic engineering foundation pit pipe well combination light well point Yield rainfall relation method | |
| CN104762981B (en) | A kind of forming hole method of dewatering well | |
| CN109519150B (en) | Dewatering well plugging device and method for large water yield | |
| CN107747312A (en) | A kind of method of sand and gravel stratum well cementing construction | |
| CN110318410A (en) | A kind of deep basal pit chance artesian water is prominent to gush decompression drought stress construction method | |
| CN100491650C (en) | Precipitation construction method for double-bushing vacuum deep well point | |
| CN108867673A (en) | A kind of underwater prevention method in the foundation pit based on the curtain that draws water | |
| CN104141300A (en) | Foundation pile hole drilling construction process | |
| CN103883291B (en) | Throw gravel in Hydrology well casing and become well equipment and construction method | |
| CN116290047B (en) | Automatic-monitoring deep foundation pit transverse connection type net-shaped precipitation construction method | |
| CN205502044U (en) | Be applied to precipitation structure in grittiness water -bearing stratum under building | |
| CN209444310U (en) | A kind of plugging dewatering well structure | |
| CN203757177U (en) | Mud sand sludge area manual pipe jacking construction device | |
| CN203007963U (en) | Ultra-high vacuum double-pipe drained well at low-permeability silt clay course | |
| CN203891785U (en) | Special joint pipe assembly for throwing of gravels in pipe of hydrogeological water well | |
| CN203846996U (en) | Well drilling device | |
| CN205917685U (en) | Integral type well dotted arranges vacuum system | |
| CN205917709U (en) | Integral type well dotted arranges house steward vacuum system | |
| CN205804362U (en) | The long screw auger drilling deposited pile constructing device of rock can be entered | |
| CN113529768A (en) | Construction method of impervious wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20140305 Termination date: 20160903 |