CN109441355A - Silt or sand bed pipe well high pressure water flushing fast pore-creating construction method - Google Patents
Silt or sand bed pipe well high pressure water flushing fast pore-creating construction method Download PDFInfo
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- CN109441355A CN109441355A CN201910005842.9A CN201910005842A CN109441355A CN 109441355 A CN109441355 A CN 109441355A CN 201910005842 A CN201910005842 A CN 201910005842A CN 109441355 A CN109441355 A CN 109441355A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 239000004576 sand Substances 0.000 title claims abstract description 70
- 238000010276 construction Methods 0.000 title claims abstract description 68
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 34
- 239000007921 spray Substances 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 42
- 230000008569 process Effects 0.000 claims abstract description 28
- 238000005086 pumping Methods 0.000 claims abstract description 18
- 239000000706 filtrate Substances 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims abstract description 17
- 238000004080 punching Methods 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 238000009412 basement excavation Methods 0.000 claims abstract description 9
- 239000000428 dust Substances 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000001556 precipitation Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 12
- 239000011148 porous material Substances 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 11
- 238000012856 packing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 241000353135 Psenopsis anomala Species 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 claims description 6
- 230000002708 enhancing effect Effects 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 2
- 239000004035 construction material Substances 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 238000012407 engineering method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229940025016 jointflex Drugs 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005370 electroosmosis Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Silt or sand bed pipe well high pressure water flushing fast pore-creating construction method, using high pressure water flushing brush dust sandy soils pore-forming, with punching speed underthrust, pore-forming is synchronous with down tube process to carry out well casing (1)；Construction is successively comprising steps of filtrate, shut-in well, well-flushing, lower pump between preparation of construction, construction lofting, excavation sand discharge pond and well head, vertical well casing, turn on pump water spray, well casing underthrust-adapter tube, termination of pumping backfill well casing and hole wall try to draw water；Spray head quantity can be increased or decreased according to pipe well sectional dimension size, be suitable for large, medium and small all kinds of pipe wells.The average 6m achievable per hour of deep-well construction is carried out in silty strata, reduces construction period.Reduce the cost of silty strata deep-well construction.Easy to operate needs manual operation, does not need biggish working face and construction material requested and equipment volume, lighter in weight can manually carry, reduce influence of the place to construction.The construction area being difficult to enter suitable for mechanical equipments such as dell, slopes.Reduce technical management cost.
Description
Technical field
The present invention relates to IPC classification E21B soil layer or the drilling technology of rock, especially silts or sand bed pipe well high pressure water
Rush fast pore-creating construction method.
Background technique
Pipe well is the water intaking for being vertically disposed on underground or the tubulose structures for protecting underground water.Pipe well hole diameter is smaller, well depth
It is larger, draw the intake structure of deep layer or phreatic water.The pipe well for squeezing into artesian aquifer, when as above ground level such as head,
Also known as artesian well.
Light well point is a kind of dewatering process to be drawn water using vacuum pump, generallys use high pressure water punching method pore-forming, pitch-row
Generally 1.2m.It is inserted into light-duty well casing in hole, encloses and fills out filtrate.Light-duty well casing connects vacuum gas bag by water header, leads to
Often with 20~30m root for one group.It is limited by the vacuum mechanism that draws water, light well point depth of effectively drawing water is about 5m, be can be used more
The mode of grade precipitation increases depth of drawing water.Application of light well point precipitation effect is reliable, but single-stage precipitation depth is restricted, and is chiefly used in slope
The excavation slope of excavation is stablized.
Ejector well point is to spray high speed in well casing by pipe-line system using high-pressure hydraulic pump or pressure-air as power source
Water flow, high speed water flow form instantaneous vacuum when passing through injector, underground water are sucked out.Ejector well point theory precipitation depth is most
Big reachable 20m, in actual application, due to the influence of well damage, ejector well point precipitation depth is usually no more than 15m.Injection
After the deficiency of well point is long-time precipitation, nozzle is easily damaged, and ejector well point can not work normally, and high-pressure hydraulic pump is caused to spray
High-velocity flow flow backward.
Patents documents disclose less.
The Chinese patent application 201110025209.X that Huizhou Hydropower Construction Co., Ltd. proposes discloses a kind of light
Type well-point dewatering construction technique, first using general geology drilling machine after mud off drilling and forming hole, installation screen pipe forms pipe well,
It is rinsed in screen pipe using high-pressure water jet again, destroys slurry coat method structure sheaf, and make screen pipe pipe week self-forming filter layer,
Then the outlet pipe that front end is equipped with immersible pump is set in screen pipe, finally starts immersible pump and realizes well-points dewatering；Pipe well is straight
Diameter is less than or equal to 200mm, and pipe well spacing is 3~10m, is additionally provided with return pipe on outlet pipe.The present invention is light-duty in tradition
It is improved on the basis of well-points dewatering, by adjusting drilling machine, the diameter of pipe well and well spacing, pipe well is at well technology, together
When combine and adjust flow control and draw water technology, not only obtain good dewatering effect, and conveniently moving, speed of application are fast, shadow
Ring range it is small, it is energy saving, be convenient to mount and dismount, the foundation pit for being applicable to the middle or small depth natural discharging slope of weak~highly permeable soil layer is opened
It digs.
The Chinese patent application 201210063435.1 that Zhongtian Construction Group Co., Ltd. proposes provides a kind of bath brill
Head, including equally distributed four tops the going out equipped with apopore for being located at the steel pipe that catchments in center, being located at steel pipe surrounding of catchmenting
Water steel pipe is connected at least one water inlet steel pipe to catchment on steel pipe, described to catchment between steel pipe and water outlet steel pipe by dividing water
The fixed connection of steel pipe.It need to only cooperate high-pressure hydraulic pump pressurization to send water, can drill by well is accomplished manually, it is simple to operate,
At low cost, speed of fulfiling hole is fast, and flushing drill bit need to only be made of common steel tube, can be made according to the diameter of pipe well,
It is convenient and efficient.
The Chinese patent application 201820214184.5 that Hangzhou Municipal Engineering Group Co., Ltd. proposes discloses one kind
The fast pore-creating device of sandy soil dewatering well, it includes bracket, connection frame and drill bit, and bracket includes three support rods, three branch
The first fixed ring and the second fixed ring are separately connected on strut, drill bit is connect by connecting rod with three support rods, and drill bit is by drill bit
Set and water injection head connect and compose, and water injection head upper end connects high-pressure hydraulic pump by water pipe, and connection frame includes connecting rod and connection
Head connects and composes, and connecting rod bottom is weldingly fixed on corresponding support rod by connecting rod, attended operation mechanism at the top of connector.
The present invention is sprayed by water pipe from water injection head by using above-mentioned technology, high-pressure hydraulic pump water outlet, is impacted using the impact force of water
Soil layer realizes fast pore-creating process, and there is structure to be simple and convenient to operate, is time saving and energy saving, and pore-forming efficiency is high, hole quality is good,
Cost is reduced, especially suitable for pipe well pore-forming under flour sand geological conditions, and repeatable recycling.
In addition, dewatering project refers to applied hydrogeology principle, by dewatering design and dewatering construction, surface water is excluded
The levels of ground water such as perched water, diving, artesian water, basement rock water, karst water in body and reduction stratum, the precipitation for meeting engineering are deep
The requirement of degree and precipitation time, and on the inert influence of engineering-environment, it includes construction and body of precipitation work system
Operating two parts of system.Its method can be divided into light well point method, ejector well point method, electro-osmosis well point method, pipe well points method and great Kou
Well, width penetrate the methods of well, sometimes for the special requirement of engineering, can also build relief well, inverted well etc..This standard only relates to gently
Type well-points dewatering and pipe well points precipitation.Wherein, be related to Application of light well point precipitation in pipe well points dewatering construction technical standard to
Water punching perforation engineering method, including guide rod type water jetting and casing water jetting are gone out.Wherein, in guide rod type water jetting, one is vibrations
Formula guide rod water jetting, one is rotary guide rod water jettings of breaking ground.Guide rod is the steel pipe of diameter 100mm or 150mm, pipe outside weld
Two water washing pipes, top are plate vibrator.After water rushes rifle punching to projected depth, guide rod is extracted, well casing is put into.Wherein, it covers
Pipe water jetting rushes rifle pore-forming using sleeve water, and casing is made of the common steel tube of 200mm.When pore-forming, casing hydraulic giant is with high pressure water
Soil layer is impacted, to select working water pressure, generally 0.8~0.9Mpa according to different soil conditions.
After punching to projected depth, 1mm more deep than planned well or so, a period of time is rinsed in Yao Jixu water supply, makes to return
The water clay content come is 5% or so.After reaching requirement, first Xiang Kongzhong fills out a small amount of sand, is put into well casing into casing again, in order to avoid well casing
It is inserted into soil.It fills out gravel and should divide and complete several times, in order to avoid pull out casing difficulty.
No matter tube well dewatering is widely used in house construction engineering, hydraulic engineering, municipal works etc..Traditional mechanical hole building
Construction technology directly need to make mud off in silt or the construction of sand bed geology and be also easy to produce the quality safeties such as collapse hole, drilling machine inclination
Accident and speed of fulfiling hole is slow, hole quality is poor, long construction period, construction investment it is big the disadvantages of.To the duration of project subject construction
And safety has large effect.
Summary of the invention
The object of the present invention is to provide silt or sand bed pipe well high pressure water flushing fast pore-creating construction methods, solve traditional machine
Tool construction method directly need to make mud off in the construction of silt sand bed geology and be also easy to produce the quality such as collapse hole, drilling machine inclination
Safety accident, and the difficult points such as speed of fulfiling hole is slow, hole quality is poor.
The purpose of the present invention will be realized by following technical measures: use high pressure water flushing brush dust sandy soils pore-forming, well casing
With punching speed underthrust, pore-forming is synchronous with down tube process to be carried out；Construction method successively includes construction procedure: preparation of construction, construction
Setting-out is excavated between sand discharge pond and well head, vertical well casing, turn on pump water spray, well casing underthrust-adapter tube, termination of pumping backfill well casing and hole wall
Filtrate, shut-in well, well-flushing, the examination of lower pump are drawn water；Wherein:
Preparation of construction includes: the selection of pipe, well casing back cover, tube wall aperture, Dense mesh screen winding, spray head installation, high-pressure hydraulic pump
Pipeline inspection, measuring well location；Excavate sand discharge pond and well head；Vertical well casing；Turn on pump water spray；Well casing underthrust；Adapter tube；Termination of pumping backfills well
Gravel packing between pipe and hole wall；Shut-in well；Well-flushing；Lower pump tries dewatering well normal work of drawing water.
Excavate sand discharge pond and well head: sand discharge pond excavation volume should be greater than 5 times of wellhole volume and be not easy apart from well head distance
More than 10m, silt easily blocks sand discharge ditch too far in sand discharge pond.
Vertical well casing: well casing is placed on the well head dug in advance vertically, and with two-way vertical line, visual angle is at 90 DEG C of angles, sighting tube
Body outer contour pops up center line in pipe shaft in advance, guarantees two-way deviation within specification tolerance.Because of well casing underthrust
By manual control, verticality is difficult to control, so using theodolite moment observation pipe shaft verticality and continuous during down tube
Correction.
Turn on pump water spray: high-pressure hydraulic pump should be opened after well casing is vertical toward spray head conveying high-pressure water.Original place is answered to spray after spray head water outlet
Water 30S, makes silty strata be in saturated-water phase as far as possible, and may be sprayed water according to chiltern difference will voluntarily sink less than 30S well casing.
Well casing underthrust: well casing underthrust should select and appoint 3 workers to be divided into 3 directions and keep pipe shaft verticality and apply downwards to well casing
Plus-pressure.It should suitably be downwardly applied to pressure in well casing down process, force well casing with the slow underthrust of speed of sand washing.If in underthrust
Well casing can be pulled and pushed up and down by the sufficient flush pipe bottom silt layer of sand of high pressure water by larger resistance until well casing bottom reaches in the process
To setting elevation.
Water pump should run without interruption in pore forming process, verified punching water pump stopping water spray in pore forming process on the spot and be more than
30S, silt may back-silt, and lead to 1 wall of well casing and hole wall back-silts closely knit can not continue underthrust.
Adapter tube: the well depth that deep-well precipitation uses is usually more than 8m, and the well casing length of market routine is 6m, and works as well casing length
Pipe shaft verticality is manually difficult to keep when more than 6m, so the mode that adapter tube can be used increases well depth.Well casing adapter tube uses socket joint
Formula structure, because bell and spigot joint is more weak, for avoid joint flex cause borehole inclination bending even can not the quality such as underthrust ask
The bending resistance that intensity biggish bar material such as reinforcing bar, angle bar etc. is attached to bell and spigot joint position enhancing well casing connector can be used in topic
Ability.
Termination of pumping backfill well casing and hole wall between gravel packing: when be inserted under well casing set elevation after to avoid Sediment deposit
Should suitably lengthen and sit bottom water spraying time, when the sediment content that well head overflows remains unchanged can filtrate under termination of pumping, when lower filtrate
Between should be carried out immediately after stopping water spray, avoid hole wall from back-silting and hole wall collapse hole.Filter pipe position is preferable using particle psephicity
4# melon seeds piece sand enclose and fill out, enclose and fill out more than position is upwardly at the top of filter pipe from bottom, each well encloses raising degree according to aqueous
Depending on the top depth of layer.
Shut-in well: to prevent mud and surface waste water from flowing into well outside pipe, the thick sticky grave of 2.00m is backfilled below earth's surface
Hole.
Well-flushing: this construction method does not cause mud off, and well-flushing need to only clear up remaining a small amount of silt in pipe.
Construction method, comprising the following steps:
A, preparation of construction:
(1) the selection of pipe bellows, steel pipe, without sandpipe and pipe of cement；Wherein bellows selects the biggish pipe of tube wall strength
Material；
(2) well casing back cover should using toughness big, permeable impermeable husky material, play and do not returned in hydraulic balance and pipe inside and outside well casing
The effect of silt；
(3) bellows is needed in pipe rib aperture, opens 2-3 on each circle rib of well casing directly to reduce well casing buoyancy
The hole of diameter 5-8mm；
(4) well casing tube wall end the clamping purse seine that 3 layer of 120 mesh Dense mesh screen is wound behind hole and with plastic ties carry out binding plus
Gu.
(5) each steel pipe spray head is intended to individually bundle with well casing, and head of the nozzle will be lower than well casing bottom 20-30cm；
(6) spray head tail portion and water pipe at least overlap 15cm and bind three with iron wire, it is ensured that do not disconnect during down tube.
(7) checked high-pressure hydraulic pump pipeline, route whether safety and stability.
(8) measuring well location；According to dewatering well well location floor plan measuring stake position, when the well point of laying is by ground obstacle
Or when execution conditions influence, scene is appropriately adjusted.
B, excavate sand discharge pond and well head: sand discharge pond excavation volume should be greater than 5 times of wellhole volume and apart from well head apart from not
Easily more than 10m, silt easily blocks sand discharge ditch too far in sand discharge pond.
C, vertical well casing: well casing is placed on the well head dug in advance vertically, and with two-way vertical line, visual angle is at 90 DEG C of angles, observation
Pipe shaft outer contour pops up center line in pipe shaft in advance, guarantees two-way deviation within specification tolerance.Because under well casing
It inserts by manual control, verticality is difficult to control, so during down tube not using theodolite moment observation pipe shaft verticality
Disconnected correction.
D, turn on pump is sprayed water: high-pressure hydraulic pump should be opened after well casing is vertical toward spray head conveying high-pressure water.Original place is answered after spray head water outlet
Spray water 30S, so that silty strata is in saturated-water phase as far as possible, according to chiltern difference may spray water less than 30S well casing will voluntarily under
It is heavy.
E, well casing underthrust: well casing underthrust should select and appoint 3 workers to be divided into 3 directions and keep pipe shaft verticalities and downward to well casing
Apply pressure.It should suitably be downwardly applied to pressure in well casing down process, force well casing with the slow underthrust of speed of sand washing.If under
Well casing can be pulled and pushed up and down by the sufficient flush pipe bottom silt layer of sand of high pressure water until well casing bottom by larger resistance during inserting
Reach setting elevation.Water pump should run without interruption in well casing pore forming process, verified punching water pump in pore forming process on the spot and stopped
More than 30S, silt may back-silt water spray, and causing well tubular wall and hole wall to back-silt closely knit can not continue underthrust.
F, take over: the well depth that deep-well precipitation uses is usually more than 8m, and the well casing length of market routine is 6m, and when well casing is long
It is manually difficult to keep pipe shaft verticality when degree is more than 6m, so the mode that adapter tube can be used increases well depth.Well casing adapter tube, which uses, to be held
Formula structure is inserted, because bell and spigot joint is more weak, to avoid joint flex from causing borehole inclination bending even can not the quality such as underthrust
Problem can be used intensity biggish bar material such as reinforcing bar, angle bar etc. and be attached to the anti-of bell and spigot joint position enhancing well casing connector
Curved ability.
G, the gravel packing between termination of pumping backfill well casing and hole wall: when be inserted under well casing set elevation after to avoid silt time
Silt, which should be lengthened suitably, sits bottom water spraying time, can filtrate, lower filtrate under termination of pumping when the sediment content that well head overflows remains unchanged
Time should carry out immediately after stopping water spray, and hole wall is avoided to back-silt and hole wall collapse hole.Filter pipe position using particle psephicity compared with
Good 4# melon seeds piece sand, which encloses, to be filled out, and is enclosed and is filled out more than position is upwardly at the top of filter pipe from bottom, and each well encloses raising degree according to containing
Depending on the top depth of water layer.
H, it shunts in a well: to prevent mud and surface waste water from flowing into well outside pipe, 2.00m thickness cohesive soil is backfilled below earth's surface
Sealing of hole.
I, well-flushing: this construction method does not cause mud off, and well-flushing need to only clear up remaining a small amount of silt in pipe.
J, lower pump examination is drawn water dewatering well normal work: every mouthful of deep-well is equipped with an immersible pump, at well construction after, dropping
Timely tripping in immersible pump in well, installs drainage pipeline and cable, and cable and pipe-line system are in setting it is noted that avoiding taking out
It is not excavated machine during water, crane etc. rolls, damaged in collision.Therefore scene will be identified on devices.Draw water with
Drainage system；Examination is carried out after the installation is completed to draw water.
Especially, well casing bottom is blocked using the clamping purse seine Dense mesh screen of layer, and sets up three steel pipe spray heads, spray head bottom end is super
To 30cm and with well casing against binding, spray head top tail end connects high-pressure hydraulic pump and water inlet pipe for well casing bottom end 20 out.Pipe well pore-forming
High pressure water is delivered to spray head by Shi Caiyong high-pressure hydraulic pump, is gone out hole outside by high pressure water flushing loose powder sand and with water flow, is used simultaneously
Manually well casing is applied into pressure down, gradually will be inserted to design altitude under well casing.It should be in well casing socket joint when well casing needs to take over
The winding of encryption Dense mesh screen and the bending resistance at even tube wall distribution bar reinforcement well casing bell and spigot at mouthful.
Advantages of the present invention and effect:
(1) for this construction method through practical proof, conventional drilling machine carries out deep-well construction in silty strata averagely per hour can be complete
At 2m, this engineering method carries out the average 6m achievable per hour of deep-well construction in silty strata.Greatly reduce construction period.
(2) this construction method is without equipment such as drilling machine, slush pumps.It is only necessary to three high-pressure hydraulic pumps, and it is used
High-pressure hydraulic pump can put into construction in later period draining, eliminate mechanical disengaging field, lease, reduce a series of expenses such as electricity consumption, hence it is evident that drop
The cost of low silty strata deep-well construction.
(3) construction material requested is market common materials, and tubing is alternative more, bellows, steel pipe can be used, without sand
Pipe, pipe of cement etc..It is essentially identical with traditional drilling well pore-forming material requested.It is easy purchase, price transparent.
(4) work post number needed for opposite drilling machine pore-forming, easy to operate slightly train general work of this engineering method can be on duty.Work
Kind limits small, advantage of lower cost.
(5) this engineering method only needs manual operation, does not need biggish working face and construction material requested volume, lighter in weight people
Work can carry, and reduce influence of the place to construction.The construction area being difficult to enter suitable for mechanical equipments such as dell, slopes
Domain.Reduce technical management cost.
Detailed description of the invention
Fig. 1 is construction site schematic diagram in the embodiment of the present invention 1.
Fig. 2 is that 1 mesohigh water of the embodiment of the present invention rushes fast pore-creating apparatus structure schematic diagram.
Appended drawing reference includes:
Well casing 1, water inlet pipe 2, spray head 3, well head 4, water source 5, sand discharge pond 6, sand discharge ditch 7, high-pressure hydraulic pump 8, well casing 9, circle rib
10, open-work 11, clamping purse seine 12, axial stiffness strengthened connection bar 13.
Specific embodiment
The principle of the invention is that, using high pressure water flushing brush dust sandy soils pore-forming, well casing is with punching speed underthrust, and pore-forming is under
The synchronous workload for carrying out and eliminating the processes such as mud off, mechanical erection and reduce well-flushing of plumber's sequence.
The present invention is larger suitable for infiltration coefficient, and soil property is powder, sandy soil, and rich groundwater, precipitation is deep, and area is big, applies
The case where work working face is narrow, short time limit.Especially suitable effect of constructing under this kind of Complicated Geologic Condition of sand bed with saturated dynamic water
Fruit is favourable, within well depth is up to 20m.
Construction method of the present invention successively includes construction procedure: preparation of construction, construction lofting excavate sand discharge pond and well head, erect
Filtrate, shut-in well between straight well pipe, turn on pump water spray, well casing underthrust-adapter tube, termination of pumping backfill well casing and hole wall, well-flushing, the examination of lower pump are taken out
Water；Wherein:
Preparation of construction includes: the selection of pipe, 9 back cover of well casing, tube wall aperture, Dense mesh screen winding, the installation of spray head 3, high pressure water
Pump 8 pipeline inspections, measuring well location；Excavate sand discharge pond 6 and well head 4；Vertical well casing 1；Turn on pump water spray；1 underthrust of well casing；Adapter tube；Stop
Gravel packing between blowback well filling pipe and hole wall；Shut-in well；Well-flushing；Lower pump tries dewatering well normal work of drawing water.
Excavate sand discharge pond 6 and well head 4: 6 excavation volume of sand discharge pond should be greater than 5 times of wellhole volume and apart from 4 distance of well head
It is not easy more than 10m, silt easily blocks sand discharge ditch 7 too far in sand discharge pond 6.
Vertical well casing 1: well casing 1 is placed on the well head 4 dug in advance vertically, and with two-way vertical line, visual angle is at 90 DEG C of angles, observation
Pipe shaft outer contour pops up center line in pipe shaft in advance, guarantees two-way deviation within specification tolerance.Because under well casing 1
It inserts by manual control, verticality is difficult to control, so during down tube not using theodolite moment observation pipe shaft verticality
Disconnected correction.
Turn on pump water spray: high-pressure hydraulic pump 8 should be opened toward 3 conveying high-pressure water of spray head after well casing 1 is vertical.Spray head 3 answers original after being discharged
Spray water 30S on ground, so that silty strata is in saturated-water phase as far as possible, may be sprayed water according to chiltern difference will voluntarily less than 30S well casing 1
Sink.
1 underthrust of well casing: 1 underthrust of well casing should select and appoint 3 workers be divided into 3 directions keep pipe shaft verticalities and to well casing 1 to
Lower application pressure.It should be suitably downwardly applied to pressure in 1 down process of well casing, force well casing 1 with the slow underthrust of speed of sand washing.If
Well casing 1 can be pulled and pushed up and down by larger resistance in down process allows the sufficient flush pipe bottom silt layer of sand of high pressure water until well casing
1 bottom reaches setting elevation.
Water pump should run without interruption in pore forming process, verified punching water pump stopping water spray in pore forming process on the spot and be more than
30S, silt may back-silt, and lead to 1 wall of well casing and hole wall back-silts closely knit can not continue underthrust.
Adapter tube: the well depth that deep-well precipitation uses is usually more than 8m, and 1 length of well casing of market routine is 6m, and when well casing 1 is long
It is manually difficult to keep pipe shaft verticality when degree is more than 6m, so the mode that adapter tube can be used increases well depth.The adapter tube of well casing 1 uses
Socket fitting type structure, because bell and spigot joint is more weak, to avoid joint flex from causing borehole inclination bending even can not the matter such as underthrust
Amount problem can be used intensity biggish bar material such as reinforcing bar, angle bar etc. and be attached to bell and spigot joint position enhancing 1 connector of well casing
Bending resistance.
Gravel packing between termination of pumping backfill well casing and hole wall: when be inserted under well casing 1 set elevation after to avoid silt time
Silt, which should be lengthened suitably, sits bottom water spraying time, can filtrate, lower filtrate under termination of pumping when the sediment content that well head overflows remains unchanged
Time should carry out immediately after stopping water spray, and hole wall is avoided to back-silt and hole wall collapse hole.1 position of filter pipe using particle psephicity compared with
Good 4# melon seeds piece sand, which encloses, to be filled out, and is enclosed and is filled out more than position is upwardly at the top of filter pipe from bottom, and each well encloses raising degree according to containing
Depending on the top depth of water layer.
Shut-in well: to prevent mud and surface waste water from flowing into well outside pipe, the thick sticky grave of 2.00m is backfilled below earth's surface
Hole.
Well-flushing: this construction method does not cause mud off, and well-flushing need to only clear up remaining a small amount of silt in pipe.
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1: as shown in Fig. 1, as a kind of preferred operation scheme of practice of construction, as shown in Fig. 1, a kind of powder
Soil or sand bed high pressure water flushing method pipe well drilling construction method, comprising the following steps:
A, preparation of construction:
(1) bellows, steel pipe can be selected, without sandpipe and pipe of cement in tubing.Wherein bellows should select tube wall strength larger
Tubing 1；
(2) 1 back cover of well casing should using toughness big, permeable impermeable husky material, play inside and outside well casing 1 in hydraulic balance and pipe not
The effect back-silted；
(3) hole of 2-3 diameter 5-8mm should be opened on each circle rib 10 of well casing to reduce 1 buoyancy of well casing；
(4) the circle rib 10 of well casing 1 winds the clamping purse seine 12 of 3 layer of 120 mesh Dense mesh screen after ending hole and is carried out with plastic ties
Binding is reinforced.
(5) each steel pipe spray head 3 is intended to individually bundle with well casing 1, and 3 bottom of spray head will be lower than 1 bottom 20-30cm of well casing；
(6) 3 tail portion of spray head and water pipe at least overlap 15cm and bind three with iron wire, it is ensured that do not disconnect during down tube.
(7) checked 8 pipeline of high-pressure hydraulic pump, route whether safety and stability.
(8) measuring well location；According to dewatering well well location floor plan measuring stake position, when the well point of laying is by ground obstacle
Or when execution conditions influence, scene is appropriately adjusted.
B, excavate sand discharge pond 6 and well head 4: 6 excavation volume of sand discharge pond should be greater than 5 times of wellhole volume and apart from well head 4 away from
From being not easy more than 10m, silt easily blocks sand discharge ditch 7 too far in sand discharge pond 6.
C, vertical well casing 1: well casing 1 is placed on the well head 4 dug in advance vertically, and with two-way vertical line, visual angle is seen at 90 DEG C of angles
Test tube body outer contour pops up center line in pipe shaft in advance, guarantees two-way deviation within specification tolerance.Because of well casing 1
Underthrust is difficult to control by manual control, verticality, so during down tube simultaneously using theodolite moment observation pipe shaft verticality
Constantly correction.
D, turn on pump is sprayed water: should open high-pressure hydraulic pump 8 toward 3 conveying high-pressure water of spray head after well casing 1 is vertical.Spray head 3 is answered after being discharged
Spray water 30S in original place, and silty strata is made to be in saturated-water phase as far as possible, and may be sprayed water according to chiltern difference will less than 30S well casing 1
Voluntarily sink.
E, 1 underthrust of well casing: 1 underthrust of well casing should select and appoint 3 workers to be divided into 3 directions and keep pipe shaft verticality and to well casing 1
It is downwardly applied to pressure.It should be suitably downwardly applied to pressure in 1 down process of well casing, force well casing 1 with the slow underthrust of speed of sand washing.
Allow the sufficient flush pipe bottom silt layer of sand of high pressure water until well if well casing 1 can be pulled and pushed up and down by larger resistance in down process
1 bottom of pipe reaches setting elevation.Water pump should run without interruption in 9 pore forming process of well casing, be verified punching in pore forming process on the spot
Water pump stops water spray more than 30S, and silt may back-silt, and causing 1 wall of well casing and hole wall to back-silt closely knit can not continue underthrust.
F, take over: the well depth that deep-well precipitation uses is usually more than 8m, and 1 length of well casing of market routine is 6m, and works as well casing 1
Length is manually difficult to keep pipe shaft verticality when being more than 6m, so the mode that adapter tube can be used increases well depth.The adapter tube of well casing 1 uses
Socket fitting type structure, because bell and spigot joint is more weak, to avoid joint flex from causing borehole inclination bending even can not the matter such as underthrust
Amount problem can be used intensity biggish bar material such as reinforcing bar, angle bar etc. and be attached to bell and spigot joint position enhancing 1 connector of well casing
Bending resistance.
G, termination of pumping backfill well casing 9 and hole wall between gravel packing: when be inserted under well casing 1 set elevation after to avoid silt
It back-silts suitably to lengthen and sits bottom water spraying time, it can filtrate, lower filter under termination of pumping when the sediment content that well head overflows remains unchanged
The material time should carry out immediately after stopping water spray, and hole wall is avoided to back-silt and hole wall collapse hole.Filter pipe position uses particle psephicity
Preferable 4# melon seeds piece sand, which encloses, to be filled out, and is enclosed and is filled out more than position is upwardly at the top of filter pipe from bottom, each well enclose raising degree according to
Depending on the top depth in water-bearing layer.
H, it shunts in a well: to prevent mud and surface waste water from flowing into well outside pipe, 2.00m thickness cohesive soil is backfilled below earth's surface
Sealing of hole.
I, well-flushing: this construction method does not cause mud off, and well-flushing need to only clear up remaining a small amount of silt in pipe.
J, lower pump examination is drawn water dewatering well normal work: every mouthful of deep-well is equipped with an immersible pump, at well construction after, dropping
Timely tripping in immersible pump in well, installs drainage pipeline and cable, and cable and pipe-line system are in setting it is noted that avoiding taking out
It is not excavated machine during water, crane etc. rolls, damaged in collision.Therefore scene will be identified on devices.Draw water with
Drainage system；Examination is carried out after the installation is completed to draw water.
In aforementioned, one or many adapter tubes are carried out according to well depth in adapter tube step.
In the embodiment of the present invention, as shown in Fig. 2,1 bottom of well casing, and frame are blocked using 4 layers of clamping 12 Dense mesh screen of purse seine
If three steel pipe spray heads, 3 bottom end of spray head is beyond 1 bottom end 20 of well casing to 30cm and with well casing 1 against binding, 3 top tail end of spray head
Connect high-pressure hydraulic pump 8 and water inlet pipe 2.High pressure water is delivered to by spray head 3 using high-pressure hydraulic pump 8 when pipe well pore-forming, passes through high pressure water
It breaks up silty sand and is gone out outside hole with water flow, while using well casing 1 is manually applied pressure down, will gradually be inserted to and setting under well casing 1
Count elevation.Dense mesh screen should be encrypted at well casing bell and spigot when well casing 1 needs to take over to wind and add in even tube wall distribution bar
Bending resistance at 1 bell and spigot of strong well casing.Entire pore forming process should keep 8 continuous water spray of high-pressure hydraulic pump, set until being inserted under well casing 1
Meter elevation and sit bottom spray water 1 minute after can termination of pumping and immediately filling filtrate prevent hole wall from back-silting.
Above embodiments are only used for explanation and illustration of the invention and explanation, understand to help to reading of the invention, but not
It limits the invention, those skilled in the art make without creative tribute the present embodiment after reading this specification
The modification offered, as long as within the scope of the present invention, belonging to the range of protection of the present invention by Patent Law.
Claims (3)
1. silt or sand bed pipe well high pressure water flushing fast pore-creating construction method, which is characterized in that use high pressure water flushing brush dust sand
Layer pore-forming, with punching speed underthrust, pore-forming is synchronous with down tube process to carry out well casing (1)；Construction method successively includes construction step
Rapid: preparation of construction, construction lofting excavate sand discharge pond and well head, vertical well casing, turn on pump water spray, well casing underthrust-adapter tube, termination of pumping time
Filtrate, shut-in well, well-flushing, the examination of lower pump between well filling pipe and hole wall draw water；Wherein:
Preparation of construction includes: the selection of pipe, well casing (9) back cover, Dense mesh screen winding, spray head (3) installation, high-pressure hydraulic pump (8) pipeline
It checks, measuring well location；Excavate sand discharge pond (6) and well head (4)；Vertical well casing (1)；Turn on pump water spray；Well casing (1) underthrust；Adapter tube；Stop
Gravel packing between blowback well filling pipe and hole wall；Shut-in well；Well-flushing；Lower pump tries dewatering well normal work of drawing water；
Excavate sand discharge pond (6) and well head (4): sand discharge pond (6) excavation volume should be greater than 5 times of wellhole volume and apart from well head (4)
Distance is not easy more than 10m, and sand discharge pond (6) silt easily blocks sand discharge ditch (7) too far；
Vertical well casing (1): well casing (1) is placed on the well head (4) dug in advance vertically, and with two-way vertical line, visual angle is seen at 90 DEG C of angles
Test tube body outer contour pops up center line in pipe shaft in advance, guarantees two-way deviation within specification tolerance；Because of well casing
(1) underthrust is difficult to control by manual control, verticality, so observing pipe shaft verticality using the theodolite moment during down tube
And it constantly rectifies a deviation；
Turn on pump water spray: high-pressure hydraulic pump (8) should be opened after well casing (1) is vertical toward spray head (3) conveying high-pressure water；After spray head (3) water outlet
Original place water spray 30S is answered, so that silty strata is in saturated-water phase as far as possible, may be sprayed water according to chiltern difference less than 30S well casing (1)
To voluntarily it sink；
Well casing (1) underthrust: well casing (1) underthrust should select and appoint 3 workers to be divided into 3 directions and keep pipe shaft verticality and to well casing (1)
It is downwardly applied to pressure；It should be suitably downwardly applied to pressure in well casing (1) down process, force well casing (1) slow with the speed of sand washing
Underthrust；If can be pulled and pushed well casing (1) up and down by larger resistance in down process allows the sufficient flush pipe bottom silt sand of high pressure water
Layer is until well casing (1) bottom reaches setting elevation；
Water pump should run without interruption in pore forming process；
Adapter tube: the well depth that deep-well precipitation uses is usually more than 8m, and well casing (1) length of market routine is 1m to 6m, and works as well casing
(1) it is manually difficult to keep pipe shaft verticality when length is more than 6m, so the mode that adapter tube can be used increases well depth；Well casing (1) connects
Pipe uses socket fitting type structure, is attached to bell and spigot joint position enhancing well casing using the biggish bar material of intensity such as reinforcing bar, angle bar
(1) bending resistance of connector；
Termination of pumping backfill well casing and hole wall between gravel packing: when be inserted under well casing (1) set elevation after to avoid Sediment deposit
Should suitably lengthen and sit bottom water spraying time, when the sediment content that well head overflows remains unchanged can filtrate under termination of pumping, when lower filtrate
Between should be carried out immediately after stopping water spray, avoid hole wall from back-silting and hole wall collapse hole；Filter pipe position is preferable using particle psephicity
4# melon seeds piece sand enclose and fill out, enclose and fill out more than position is upwardly at the top of filter pipe from bottom, each well encloses raising degree according to aqueous
Depending on the top depth of layer；
Shut-in well: to prevent mud and surface waste water from flowing into well outside pipe, 2.00m thickness cohesive soil sealing of hole is backfilled below earth's surface；
Well-flushing: remaining a small amount of silt in pipe need to only be cleared up.
2. silt as described in claim 1 or sand bed pipe well high pressure water flushing fast pore-creating construction method, which is characterized in that construction
Method, comprising the following steps:
A, preparation of construction:
(1) the selection of pipe bellows, steel pipe, without sandpipe and pipe of cement；Wherein bellows should select the biggish tubing of tube wall strength；
(2) well casing (1) back cover should using toughness big, permeable impermeable husky material, play inside and outside well casing (1) in hydraulic balance and pipe not
The effect back-silted；
(3) for bellows, the hole of 2-3 diameter 5-8mm is opened on each circle rib (10) of well casing；
(4) the circle rib (10) of well casing (1) end the clamping purse seine (12) that 3 layer of 120 mesh Dense mesh screen is wound behind hole and with plastic ties into
Row binding is reinforced；
(5) each steel pipe spray head (3) is intended to individually bundle with well casing (1), and spray head (3) bottom will be lower than well casing (1) bottom 20-
30cm；
(6) spray head (3) tail portion and water pipe at least overlap 15cm and bind three with iron wire, it is ensured that do not disconnect during down tube；
(7) checked high-pressure hydraulic pump (8) pipeline, route whether safety and stability；
(8) measuring well location；According to dewatering well well location floor plan measuring stake position, when the well point of laying by ground obstacle or is applied
When work condition influences, scene is appropriately adjusted；
B, excavate sand discharge pond (6) and well head (4): sand discharge pond (6) excavation volume should be greater than 5 times of wellhole volume and apart from well head
(4) distance is not easy more than 10m, and sand discharge pond (6) silt easily blocks sand discharge ditch (7) too far；
C, vertical well casing (1): well casing (1) is placed on the well head (4) that has dug in advance vertically, with two-way vertical line, visual angle at 90 DEG C of angles,
It observes pipe shaft outer contour or pops up center line in pipe shaft in advance, guarantee two-way deviation within specification tolerance；Under
Pipe shaft verticality is observed using the theodolite moment during pipe and is constantly rectified a deviation；
D, turn on pump is sprayed water: high-pressure hydraulic pump (8) should be opened after well casing (1) is vertical toward spray head (3) conveying high-pressure water；Spray head (3) water outlet
After answer original place spray water 30S, so that silty strata is in saturated-water phase as far as possible, may be sprayed water according to chiltern difference less than 30S well casing
(1) will voluntarily sink；
E, well casing (1) underthrust: well casing (1) underthrust should select and appoint 3 workers to be divided into 3 directions and keep pipe shaft verticality and to well casing
(1) it is downwardly applied to pressure；It should be suitably downwardly applied to pressure in well casing (1) down process, force well casing (1) slow with the speed of sand washing
Slow underthrust；If can be pulled and pushed well casing (1) up and down by larger resistance in down process allows the sufficient flush pipe bottom silt of high pressure water
Layer of sand is until well casing (1) bottom reaches setting elevation；Water pump should run without interruption in well casing (9) pore forming process, be verified on the spot
Punching water pump stops water spray more than 30S in pore forming process, and silt may back-silt, and well casing (1) wall and hole wall is caused to back-silt closely knit nothing
Method continues underthrust；
F, take over: the well depth that deep-well precipitation uses is usually more than 8m, and well casing (1) length of market routine is 6m, and works as well casing (1)
Length is manually difficult to keep pipe shaft verticality when being more than 6m, so the mode that adapter tube can be used increases well depth；Well casing (1) adapter tube is adopted
Use socket fitting type structure；
G, it the gravel packing between termination of pumping backfill well casing (9) and hole wall: suitably lengthens and sits after being inserted to setting elevation under well casing (1)
Bottom water spraying time, when the sediment content that well head overflows remains unchanged can under termination of pumping filtrate, lower filtrate time should stop spraying
It is carried out immediately after water, hole wall is avoided to back-silt and hole wall collapse hole；Filter pipe position uses the preferable 4# melon seeds piece sand of particle psephicity
It encloses and fills out, enclose and fill out more than position is upwardly at the top of filter pipe from bottom, each well encloses raising degree according to the top depth in water-bearing layer
Depending on；
H, it shunts in a well: backfilling 2.00m thickness cohesive soil sealing of hole below earth's surface；
I, well-flushing: this construction method does not cause mud off, and well-flushing need to only clear up remaining a small amount of silt in pipe；
J, lower pump examination is drawn water dewatering well normal work: every mouthful of deep-well is equipped with an immersible pump, at well construction after, in dewatering well
Interior timely tripping in immersible pump, installs drainage pipeline and cable, and cable and pipe-line system are in setting it is noted that avoiding drawing water
Machine is not excavated in journey, crane etc. rolls, damaged in collision；Therefore scene will be identified on devices；It draws water and drains
System；Examination is carried out after the installation is completed to draw water.
3. silt as described in claim 1 or sand bed pipe well high pressure water flushing fast pore-creating construction method, which is characterized in that use
4 layers of clamping purse seine (12) Dense mesh screen block well casing (1) bottom, and set up at least three steel pipe spray heads (3), and spray head (3) bottom end is super
Out well casing (1) bottom end 20 to 30cm and with well casing (1) against binding, spray head (3) top tail end connect high-pressure hydraulic pump (8) and intake
It manages (2)；High pressure water is delivered to spray head (3) using high-pressure hydraulic pump (8) when pipe well pore-forming, by high pressure water flushing loose powder sand and with water
Stream is gone out outside hole, while using well casing (1) is manually applied pressure down, gradually will be inserted to design altitude under well casing (1)；Work as well
Pipe (1) should encrypt Dense mesh screen winding at well casing bell and spigot and reinforce well casing (1) in even tube wall distribution bar when needing to take over
Bending resistance at bell and spigot.
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| CN201910005842.9A CN109441355A (en) | 2019-01-03 | 2019-01-03 | Silt or sand bed pipe well high pressure water flushing fast pore-creating construction method |
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Application publication date: 20190308 |