CN208633130U - Integral type orients vacuum well point pipe - Google Patents
Integral type orients vacuum well point pipe Download PDFInfo
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- CN208633130U CN208633130U CN201821189372.3U CN201821189372U CN208633130U CN 208633130 U CN208633130 U CN 208633130U CN 201821189372 U CN201821189372 U CN 201821189372U CN 208633130 U CN208633130 U CN 208633130U
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a kind of integral type orientation vacuum well point pipe, including outer tube, inner tube is arranged in outer tube, outer tube is threaded with downwards short tube, short tube is welded with downwards partition, and partition is welded with downwards conulite, and conulite side wall offers several water outlets；Outer tube bottom end is connected with partition；Partition in inner tube is equipped with check-valves；Inner tube top bending extendes back out the top side wall of outer tube；Vacuum draw water area top outer tube and inner tube between be equipped with sealing ring, inner pipe sleeve is equipped with plastic row water drum, is intervally distributed with multiple protrusions on plastic row water drum；Inner tube is equipped with multiple inner tube water inlets, and outer tube is equipped with multiple outer tube water inlets；Outer layer inside pipe wall is equipped with geotextile layer, and geotextile layer inner surface is equipped with the metal net layer of tubular.The utility model installation, independent of coarse sand is poured into, can prevent mud from blocking without crane, drainage channel in soft soil layer, realize orientation precipitation, effect on environment is small, and cost is relatively low.
Description
Technical field
The utility model relates to the realm of building construction more particularly to vacuum well point pipes and corresponding dewatering process.
Background technique
In generally deeper underground engineering construction, the construction method for mostly using slope or supporting to cut the earth greatly, when its construction
When depth is in level of ground water or less, foundation pit is commonly encountered underground water burst or quicksand invasion, therefore is needed in construction using artificial drop
Phreatic low.
A large amount of groundwater abstractions can cause surface subsidence around place, building deformation and water, soil resource environment to be disliked
Change.With the enhancing of government's environmental consciousness in recent years, the understanding of groundwater resources is protected constantly to reinforce, all parts of the country take one
Series limit takes out limit row's measure.Common Groundwater Control method includes water seal curtain, well-points dewatering and recharge etc., and well-points dewatering is again
It is divided into pipe well points, vacuum well point, ejector well point and electro-osmosis well point etc..
Water seal curtain and recharge should not be promoted because at high cost, and current well-points dewatering technique cannot be controlled effectively and be drawn water
Amount and construction cost height.
Traditional tube well dewatering, which depends on gravity, collects underground water into pipe well, and the water collected in pipe well passes through
Suction pump discharge.This dewatering mode does not have the effect for making that water is combined to get rid of soil particle gravitation, can only extract a small amount of gravity out
Water, the clay small for infiltration coefficient, silty clay, the dewatering effect of clay silt layer are poor.
With the development of precipitation technology, tube well dewatering introduces the supplementary means of negative pressure of vacuum, accelerates underground water toward well
Inside collect, improves drainage efficiency and dewatering effect.But it is larger to foundation pit external environment influence, it be easy to cause foundation pit externally
It is lauched a wide range of reduction, so as to cause Earth cave outside foundation pit, causes a series of environmental and safety problems
Vacuum well point device aspirates underground water under vacuum, through sand filter blanket, so that groundwater level is reduced to
Certain depth.The structure of traditional vacuum well-point pipe is: uniformly filter is made in punching on the tube wall of vacuum well point pipe lower part, then again
Vacuum well point pipe is made in 2 ~ 3 layers of strainer of cladding.Well point installation generallys use " water jetting " and " mechanical intubation " counterbore, then will
The vacuum well point pipe insertion counterbore made, manually puts into coarse sand in hole wall surrounding and constitutes drainage channel, in the surface layer of ground
After being consolidated with clay, connecting branch, general pipeline, turn on pump carry out precipitation.There are following disadvantages for existing vacuum well point:
First is that, because the bath rifle manipulated by crane need to be extracted, being then put into well point device by crane again, finally again after pore-forming
The back-up sand in hole, it is inevitable longer to this process interval time of back-up sand after causing wellhole to shape, to be easy to cause hole wall soil
It collapses, silts up or part silts filter of the well point device lower part to aspirate underground water up, directly affect its function for aspirating underground water
Can, to seriously affect the quality of dewatering project.It is this due to rushing heavy overlong time, causing hole wall collapse and influencing dewatering project
The case where quality, mucky silt, Extra-fine sand class soil condition under and second level Application of light well point precipitation engineering construction in especially
Seriously.
Second is that since caliber, length and weight are intended to greatly compared with the pipe of vacuum well point for the bath rifle that rushes open caisson spot hole,
Therefore, punching operation need to be operated by crane, thus occupy biggish dewatering project construction cost.
Three, for soft soil layer, especially silt soil strata, vacuum well point pipe outlet effect and survival rate are bad, because
Filter inlet opening tends to be blocked by fluid-tight mud, and " dead pipe " is formed when serious.
Four, the embedded needs of traditional vacuum well-point pipe are constructed well point hole in advance, after drainage channel is buried by vacuum well point pipe
The coarse sand poured into is formed, and speed of application is slow, and material cost is higher；It will lead to the coarse sand amount of pouring into when counterbore is ineffective to be difficult to
Control, it is difficult to form smooth drainage channel, cause dewatering effect bad.
Five, due to being limited by vacuum well point suction, the length of general vacuum well point is disposed as 6.0 ~ 8.0m, for this purpose,
The method that deep layer precipitation often takes classification precipitation is excavated one layer, is then inserted again that is, after level of ground water is reduced to 4.0 ~ 6.0m
Enter Application of light well point precipitation, precipitation multistage in this way, to reach required requirement.It is required since multistage precipitation need to be taken to can be only achieved
Effect, therefore cause the waste of a large amount of equipment, electric power.
Six, not can control the pump-out outside foundation pit, it is larger to foundation pit external environment influence, be easy to cause foundation pit externally under
Water reduces on a large scale, so as to cause Earth cave outside foundation pit, causes a series of environmental and safety problems.
Utility model content
The purpose of this utility model is to provide a kind of integral type orientation vacuum well point pipe, installation without crane, filtering layer and
Drainage channel can prevent mud from blocking independent of coarse sand is poured into, in soft soil layer, greatly improve dewatering effect, realize orientation
Precipitation prevents underground water outside foundation pit from reducing on a large scale, and small to foundation pit external environment influence, cost is relatively low.
To achieve the above object, the integral type orientation vacuum well point pipe of the utility model includes outer tube, outer tube inner sleeve
Equipped with inner tube, the outer diameter of inner tube is less than the internal diameter of outer tube；Outer tube is threaded with downwards for surrounding setting pot
Short tube, the axis of short tube, inner tube and outer tube are same straight line；Short tube is 200 ± 2 millimeters high；
Short tube is welded with downwards partition；Partition is welded with downwards conulite, and conulite tip is arranged downward, hollow cone
Body sidewall offers several water outlets；
Inner tube bottom end is connected with partition, and the partition in inner tube is equipped with through-hole, which is equipped with for preventing
Water is blowed back into the check-valves of inner tube by conulite；
Inner tube top bending extendes back out the top side wall of outer tube；Toroidal cavity is surrounded between outer tube and inner tube,
Partition and short tube and inner tube surround setting pot；Vacuum is equipped in toroidal cavity above setting pot to draw water area；
Vacuum draw water area top outer tube and inner tube between be equipped with sealing ring, sealing ring to the internal layer between setting pot
It is arranged in pipe outer wall and plastic row water drum is installed, multiple protrusions are intervally distributed on plastic row water drum；
Vacuum draw water area bottom inner tube be equipped with multiple inner tube water inlets, circumferential direction of each inner tube water inlet in inner tube
It is uniformly distributed on direction；Vacuum draw water area middle and upper part outer tube be equipped with multiple outer tube water inlets；The outer water inlet tube of bottom
Mouth is higher than the inner tube water inlet of the top；
Distribution of the outer tube water inlet in outer tube circumferential direction has following regularity:
Outer tube is divided into symmetrical two parts with plane where outer tube axis, each outer tube water inlet is evenly distributed on it
In a part on；
Geotextile layer is installed, the inner surface of geotextile layer is equipped with cylinder on sealing ring to the outer layer inside pipe wall between setting pot
The metal net layer of shape, multiple protrusions on the plastic row water drum with metal net layer snap fit；The outer wall of plastic row water drum,
Drainage channel is surrounded between multiple protrusions and the inner wall of metal net layer.
The outer tube is seamless steel pipe, and the inner tube is plastic tube；
The partition is steel plate.
Inner tube water inlet is equipped with multilayer, and every layer is equipped with multiple inner tube water inlets；
Two layers neighbouring of inner tube water inlet interlaced arrangement in the lateral direction.
The slide-valve of tubular is equipped in the inner tube, slide-valve outer diameter is less than 1-3 millimeters of internal layer bore；Slide-valve
Its top is higher than the inner tube water inlet of the top when bottom end connects with partition；The density of slide-valve is less than the density of water.
Manage both precipitation performances with super strength in the integral type orientation vacuum well point of the utility model, it may have orientation, which is drawn water, to be subtracted
The function of settling around few, water conservation are environmentally protective；Punching, installation vacuum well point in the dewatering process of the utility model
Pipe, tube drawing integration, the accidents such as collapse hole necking down before vacuum well point pipe is installed that avoid occur, convenient for construction；Vacuum well point pipe can
Sink when excavating, is not required to the high-cost investment such as two-stage light well point, ejector well point and deep well points, deep layer drop can be carried out
Water has substantially been saved cost, and has not been limited by suction；The utility model can backwash vacuum well point pipe, avoid becoming silted up
Blocking of the mud to filtering layer；It is not required to the back-up sand around after the installation of vacuum well point pipe, reduces construction cost；Crane is replaced with leading truck,
Equipment handover charge is reduced to use.
Slide-valve in the utility model is very ingenious, self-closed inner tube inlet opening in the presence of hydraulic pressure when punching,
Draw water precipitation when inner tube inlet opening can be left automatically under the action of buoyancy again, without manual operation.
The utility model uses filtering layer (geotextiles) additional steel pipe housing (outer tube), and Multifunctional core is arranged in outer tube
It manages (inner tube), makes past punching, An Guan, fills out filtrate etc. to become integrated construction, be not necessarily to back-up sand, be not in hole collapse
Etc. technical problems, while also therefore enormously simplify working procedure, improve work efficiency.The utility model is suitable for differently
The place of matter feature, especially silt soil strata.Reinforcement, AsA -GSH cycle also using well-point pipe to the soil body, enhance side slope
The ability of stability and resistance to deformation.
The utility model slide-valve controls inner tube water inlet, and punching, vacuum can be made to draw water, backwash a shared modeling
Expect that the inner tube of matter as pipelined channel, simplifies vacuum well point pipe structure, reduces vacuum well point pipe cost of manufacture.
Steel pipe (i.e. outer tube) uses unilateral drilling on the outside of the utility model, and gradient installation vacuum well point pipe is excavated on edge,
Orientation is concentrated and is drawn water, and is made precipitation funnel close to excavating sideline, is reduced the pump-out on the outside of foundation pit, is improved and is excavated side precipitation effect
Rate shortens cycle in precipitation, reduces to ground influence degree around and to the influence degree of water resource.
The inner tube water inlet of the utility model inner tube is in lowest part.Implement to extract outside inner tube when precipitation using vacuum pump
Air, so that vacuum well point is managed outer foundation pit side and condition of high vacuum degree negative pressure state be presented, force to generate powerful gravitation in conjunction with water pendulum
The binding force of de- soil particle makes that water is combined to carry out mud, moisture by loaded filter (geotextile layer and metal net layer) in company with bulk water
From, subsequently into drainage channel, and the formation gas and water separation in drainage channel.After aqueous vapor separation, water is through inner tube water inlet pump drainage
To well point general pipeline, the higher vacuum degree of intensity can be remained on the outside of the pipe of vacuum well point.Since inner tube water inlet is set
It is consistently higher than the inner tube water inlet in inner tube in the water level in bottom, foundation pit, then keeps shape between inner tube water inlet and the soil body
At a fluid-tight state.No matter how vacuum well point pipe exposes, and is in lasting seals shape between inner tube water inlet and the soil body always
State can remain negative-pressure vacuum, avoid the vacuum well point pipe gas leakage exposed due to excavation of foundation pit cause vacuum degree by
Gradually lose.
The utility model punching and well-point pipe installation integration, to this process interval time of back-up sand after preventing wellhole from shaping
Too long the phenomenon that causing hole wall collapse and then seriously affecting the quality of dewatering project.
Without crane when the integral type orientation vacuum well point pipe installation of the utility model, operating expenses, pole have substantially been saved
Installation operation is simplified greatly, is reduced task difficulty, is reduced labor intensity, improves installation effectiveness.
The utility model outer tube water inlet and inner tube water inlet be equipped with it is multiple, and have geotextile layer and metal net layer
As filter structure, it is less likely to occur to block when drawing water.
In the utility model, inner tube water inlet is lower than outer tube water inlet, can guarantee when dewatering operation in inner tube always
With certain water level, fluid-tight state is kept, negative pressure is prevented to be lost；Geotextile layer and metal net layer prevent silt particle to be largely sucked
Out.
The embedded needs of traditional vacuum well-point pipe construct in advance well point hole, filtering layer and drainage channel by vacuum well point pipe outside
Strainer and the coarse sand poured into after burying are formed, and speed of application is slow, and material cost is higher, and are difficult to form smooth draining logical
Road causes dewatering effect bad.In contrast, plastic row water drum in the utility model, multiple protrusions and metal net layer is interior
Drainage channel is surrounded between wall, drainage channel can guarantee that drainage channel is smooth independent of the coarse sand and construction quality poured into
It is logical.
It in the utility model, during stage excavation, is managed always using same set of vacuum well point, prepares one without every layer
It need not stop jet vacuum pump when covering well-point pipe, and carrying out lower layer's precipitation, construction efficiency is higher, has saved equipment cost and electricity
Power cost.
The utility model can be realized orientation precipitation, to controlled well to excavating region (foundation pit) drawing water outside
Amount, to foundation pit externalities very little, not will cause underground water outside foundation pit reduces on a large scale, causes ground outside foundation pit uneven
Phenomena such as even sedimentation, avoids thus leading to a series of environmental problem and safety problem.
The dewatering process of the utility model is compared with the past to substantially increase efficiency of drawing water, the blocking probability in pump process
It is greatly reduced, can be realized orientation and draw water.
Pressing additional high pressure water punching, can accelerate speed of application when soil property is harder, keep vacuum well point pipe rapid just
Position.
Outer tube is divided into symmetrical two parts with plane where outer tube axis, each outer tube water inlet is evenly distributed on it
In a part on；In this way, allow for outer tube water inlet only outer layer pipe ring to 180 degree on be distributed so that vacuum well point is managed
It is provided with directionality, i.e. outer tube water inlet is towards which direction, it will be able to concentrate the intracorporal water of soil extracted in this direction, on the contrary
The water in direction then not by the effect of the negative pressure from outer tube water inlet, influences very little to the soil body other than construction area.Due to negative
The direction of pressure is concentrated towards excavation region (foundation pit), therefore is improved under the premise of not improving the power for penetrating vacuum pump and excavated side
Precipitation efficiency.
Two layers neighbouring of inner tube water inlet interlaced arrangement in the lateral direction, i.e., water inlet tube in neighbouring two layers
The uniformity into water can be improved not in same vertical lines in mouth in this way.
When using high pressure water punching, slide-valve is moved downwardly at partition in the presence of hydraulic pressure and is hindered by partition
Gear.At this time slide-valve top be higher than the top inner tube water inlet, therefore when punching slide-valve can close all inner tubes into
The mouth of a river.Certainly, since slide-valve outer diameter is less than 1-3 millimeter of internal layer bore, still have a small amount of water by slide-valve and
Gap between inner tube is come inner tube water inlet and is flowed out.The effect of slide-valve is exactly to prevent water largely by inner tube water inlet
Place flows outwardly, and a small amount of water does not constitute influence to punching and the periphery soil body by the outflow of inner tube water inlet.After punching, in the buoyancy of water
Under effect, slide-valve is floated up, to no longer block inner tube water inlet, realize vacuum suction effect can smoothly.
Excavator is the necessary equipment for excavating the soil body, and device of the usage mining machine as pressing vacuum well point pipe can either
Meet the needs of sinking vacuum well point pipe, and very convenient, without the dress in addition purchasing and transporting special pressing vacuum well point pipe
It sets, not only improves working efficiency, but also save the cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of integral type orientation vacuum well point pipe；
Fig. 2 is the enlarged diagram of integral type orientation vacuum well point pipe middle and lower part；
Fig. 3 is the construction location schematic diagram of the utility model when having second level side slope.Direction shown in arrow is vacuum well in Fig. 3
Point pipe sinks to direction.
Specific embodiment
As shown in Figure 1 to Figure 3, the integral type orientation vacuum well point pipe of the utility model includes outer tube 1, in outer tube 1
It is arranged with inner tube 2, the outer diameter of inner tube 2 is less than the internal diameter of outer tube 1；It is heavy for surrounding that outer tube 1 is threaded with downwards
The short tube 6 in sand pond, the axis of short tube 6, inner tube 2 and outer tube 1 are same straight line；Short tube can be in external fiber tube is also possible to
Fiber tube, corresponding 1 bottom of outer tube are then provided with internal thread or outer silk.Short tube is 200 ± 2 millimeters high；
Short tube 6 is welded with downwards partition 4；Partition 4 is welded with downwards conulite 3, and 3 tip of conulite is arranged downward,
3 side wall of conulite offers several water outlets 16；
2 bottom end of inner tube is connected with partition 4, and the partition 4 in inner tube 2 is equipped with through-hole, which is equipped with and is used for
Prevent water from blowing back into the check-valves 5 of inner tube 2 by conulite 3；
2 top of inner tube is commutated through 90 degree of elbow extendes back out the top side wall of outer tube 1 and for connecting external bath
Pipe or well point general pipeline；Toroidal cavity, partition 4 and short tube 6 are surrounded between outer tube 1 and inner tube 2 and inner tube surrounds setting pot；
Vacuum is equipped in toroidal cavity above setting pot to draw water area；Filler in Fig. 1 and Fig. 2 at setting pot indicates precipitating here
Silt particle.The material of short tube is identical as outer tube.
Vacuum draw water area top outer tube 1 and inner tube 2 between be equipped with sealing ring 7, sealing ring 7 is between setting pot
It is arranged on 2 outer wall of inner tube and plastic row water drum 8 is installed, multiple raised 9 are intervally distributed on plastic row water drum 8；
Vacuum draw water area bottom inner tube 2 be equipped with multiple inner tube water inlets 10, each inner tube water inlet 10 is in inner tube 2
Circumferential direction on be uniformly distributed, be in quincuncial arrangement；Vacuum draw water area middle and upper part outer tube 1 be equipped with multiple outer water inlet tubes
Mouth 11；The outer tube water inlet 11 of bottom is higher than the inner tube water inlet 10 of the top；
Distribution of the outer tube water inlet 11 on circumferential (i.e. circumferential) direction of outer tube 1 has following regularity:
Outer tube 1 is divided for symmetrical two parts with plane where 1 axis of outer tube, each outer tube water inlet 11 is uniformly distributed
In a part wherein；It is only distributed in the 180 degree of 1 circumferencial direction of outer tube in this way, allowing for outer tube water inlet 11, so that
Vacuum well point pipe is provided with directionality, i.e. outer tube water inlet 11 is towards which direction, it will be able to concentrate the soil extracted in this direction
Intracorporal water, the water of opposite direction is not then by the effect of the negative pressure from outer tube water inlet 11, to the soil body other than construction area
Influence very little.
The geotextile layer 12 of tubular is installed on sealing ring 7 to 1 inner wall of outer tube between setting pot, geotextile layer 12
Inner surface is equipped with the metal net layer 13 of tubular, and multiple raised 9 on the plastic row water drum 8, which are pressed with metal net layer 13, matches
It closes；The outer wall of plastic row water drum 8, multiple raised 9 and metal net layer 13 inner wall between surround drainage channel 14.
It is also sand setting region in inner tube above check-valves, below the inner tube water inlet of bottom.When normal work, water
It is flowed upwards out after entering inner tube by inner tube water inlet, heavier silt particle is deposited in downwards above check-valves.
The seamless steel pipe that the outer tube 1 is 110 millimeters of diameter, the plastic tube that the inner tube 2 is 50 millimeters of diameter；
The partition 4 is steel plate.
Inner tube water inlet 10 is equipped with multilayer, and every layer is equipped with multiple inner tube water inlets 10；
Two layers neighbouring of inner tube water inlet 10 interlaced arrangement in the lateral direction, i.e., two layers neighbouring of inner tube into
The mouth of a river 10 is in quincuncial arrangement, the uniformity into water can be improved so not in same vertical lines.
The slide-valve 15 of tubular is equipped in the inner tube 2,15 outer diameter of slide-valve is less than 1-3 millimeters of 2 internal diameter of inner tube；
Its top is higher than the inner tube water inlet 10 of the top when 15 bottom end of slide-valve connects with partition 4；Slide-valve 15 is preferably by plastics system
At the density of slide-valve 15 is less than the density of water.
When using high pressure water punching, slide-valve 15 is moved downwardly in the presence of hydraulic pressure at partition 4 and by 4 institute of partition
Stop.At this time 15 top of slide-valve be higher than the top inner tube water inlet 10, therefore when punching slide-valve 15 can close it is all
Inner tube water inlet 10.Certainly, it since 15 outer diameter of slide-valve is less than 1-3 millimeters of 2 internal diameter of inner tube, still has a small amount of
Water is come at inner tube water inlet 10 and is flowed out by the gap between slide-valve 15 and inner tube 2.The effect of slide-valve 15 is exactly
It prevents water from largely being sprayed outward by inner tube water inlet 10, guarantees that hydraulic pressure is concentrated and discharged to punching direction, guarantee the smooth of punching
It carries out.A small amount of water does not constitute influence to punching and the periphery soil body by the outflow of inner tube water inlet 10.After punching, in the buoyancy of water
Under, slide-valve 15 floats up, to no longer block inner tube water inlet 10, realize vacuum suction effect can smoothly.
The invention also discloses the dewatering process for using above-mentioned integral type orientation vacuum well point pipe to carry out, first steps
It is that determining vacuum well point pipe is initially sunk to a little；
It is divided into three kinds of operating conditions；
The first operating condition is for there is water seal curtain construction site, and excavating aperture lines is on the inside of water seal curtain, by water proof curtain
Curtain inside (i.e. water seal curtain towards the side at excavation) is initially sunk to a little as vacuum well point pipe；
Second of operating condition is the construction site for level-one slope excavating；
Vacuum well point pipe is initially sunk to a little as the upper opening line of design side slope；
The third operating condition is the construction site for second level slope excavating, and vacuum well point pipe is initially sunk to a little as second level side slope
17 gradient extended line and the intersection point on ground；Position shown in label 19 is to excavate preceding ground position in Fig. 3.
Second step is that determining vacuum well point pipe sinks to inclination angle, and vacuum well point pipe is in place；
Specifically a placement vacuum well point pipe leading truck is initially sunk in vacuum well point pipe；Leading truck is right angled triangle,
Bevel edge adjustable angle, bevel edge is channel steel and its angle is identical as design grade；Vacuum well point pipe is placed in the bevel edge of leading truck
On, and make the conulite 3 of vacuum well point pipe lower end be aligned vacuum well point pipe initially sink to a little make outer tube in outer tube 1 into
The center position in excavation area domain is just being treated at the mouth of a river 11, and vacuum well point pipe orientation can in this way extracted in the soil body in region to be excavated
Water, on other than construction area the soil body influence very little；
Third step is punching installation vacuum well point pipe；
Using the outlet pipe of high-pressure hydraulic pump as jet water spout, the end that inner tube 2 stretches out outer tube 1 is connected with jet water spout
It connects；High-pressure hydraulic pump is opened, high pressure water flow flows downward along inner tube 2, and under the percussion of water flow, slide-valve 15 is moved downward
Stop to partition 4 and by partition 4, slide-valve 15, which is picked up, at this time keeps off all inner tube water inlets 10, prevents water flow from largely passing through
Inner tube water inlet 10 flows out；If water flow largely passes through the outflow of inner tube water inlet 10, it is downward on the one hand substantially to weaken water flow
Impact force slows down punching speed or even is unable to complete punching, on the other hand then damages to the soil body.
Since 15 outer diameter of slide-valve is less than 1-3 millimeters of 2 internal diameter of inner tube, still has a small amount of water and pass through slide-valve
Gap between 15 and inner tube 2 is come at inner tube water inlet 10 and is flowed out.A small amount of water is flowed out by inner tube water inlet 10 to punching
Influence is not constituted with the periphery soil body.
High pressure water flow flows downwardly into conulite 3 by check-valves 5, and downward by the water outlet 16 on conulite 3
Simultaneously cutting soil is impacted, vacuum well point pipe is made to sink down into predetermined position along direction initialization；
Vacuum well point pipe sinks down into predetermined position, and (bottom of vacuum well point pipe in predetermined position is located at first layer excavation at this
The bottom in region) after, close high-pressure hydraulic pump；Under the action of buoyancy, slide-valve 15 floats to leave inner tube water inlet 10；
High-pressure hydraulic pump is conventional equipment, not shown.
Four steps is to vacuumize precipitation；
The end that inner tube 2 stretches out outer tube 1 is connected with well point general pipeline, well point general pipeline connection jet vacuum pump；It beats
Jet vacuum pump is opened, generates negative pressure in inner tube 2；Negative pressure is along inner tube water inlet 10, drainage channel 14, metal net layer 13, soil
Work layer of cloth 12 reaches outer tube water inlet 11；Under the action of negative pressure, the intracorporal water of soil in region to be excavated along outer tube water inlet 11,
Geotextile layer 12, metal net layer 13, drainage channel 14 and inner tube water inlet 10 enter inner tube 2, and are passed through by jet vacuum pump
Well point general pipeline extraction；In pump process, institute's band sludge settling is at setting pot in water；
In this step, inner tube 2 is preferably connect with flexible plastic tube with well point general pipeline, carries out vacuum pumping with jet vacuum pump
Water.
5th step is first layer earth excavation；
Every 3 ± 0.5 meters are excavated layer for one, observe precipitation event before excavation, it is ensured that the intracorporal water level of soil is lower than excavation operation
Place；Pay attention to protecting vacuum well point pipe when excavating after precipitation, until this layer of earth excavation finishes；Excavate again after precipitation is that this field is normal
Rule technology can adversely affect to avoid the water in the soil body to work bring is excavated.
6th step is next layer of earth excavation；
After the completion of upper one layer of earth excavation, jet vacuum pump is not shut down, and is managed along direction initialization pressing vacuum well point, is made vacuum
Well-point pipe continues to sink down into predetermined position, and (the vacuum well point bottom of the tube in predetermined position is located at next layer of earth excavation region herein
Bottom)；
Under the action of negative pressure, the intracorporal water of soil in region to be excavated is along outer tube water inlet 11, geotextile layer 12, metal net layer
13, drainage channel 14 and inner tube water inlet 10 enter inner tube 2, and are extracted out by jet vacuum pump by well point general pipeline；It is drawing water
In the process, in water institute band sludge settling at setting pot；Observe precipitation event, it is ensured that the intracorporal water level of soil is lower than excavation operation
Place；Pay attention to protecting vacuum well point pipe when excavating after precipitation, until this layer of earth excavation finishes；
Repeat the 6th step, until scheduled all layers of earth excavation finishes.
It further include having the 7th step, the 7th step is tube drawing and carries out backwash step；
Vacuum well point pipe is specifically extracted, short tube 6 is screwed off from 1 lower end of outer tube, takes out slide-valve 15, clear up in short tube 6
Sand setting；Outer tube lower end 2 is closed using pipe plug, using the outlet pipe of high-pressure hydraulic pump as jet water spout, inner tube 2 is stretched out into outer layer
The end of pipe 1 is connected with jet water spout；High-pressure hydraulic pump is opened, high pressure water flow flows downward along inner tube 2, and passes through interior water inlet tube
Mouth 10, drainage channel 14, metal net layer 13 and geotextile layer 12 reach outer tube water inlet 11, final to flow out；It is complete in the process
At backwash, inner tube water inlet 10, drainage channel 14,11 shape of metal net layer 13, geotextile layer 12 and outer tube water inlet are prevented
At water stream channel block.(especially preventing from blocking at geotextile layer 12 and metal net layer 13)
In third step, when soil property is harder at construction, keep vacuum well point pipe heavy using pressing additional high pressure water punching
Enter to setting position；Pressing is to be managed using excavator along punching direction pressing vacuum well point.
Pressing additional high pressure water punching, can accelerate speed of application when soil property is harder, keep vacuum well point pipe rapid just
Position.
In 6th step, usage mining machine is managed along direction initialization pressing vacuum well point, and vacuum well point is made to manage secondary sinking.
Excavator is the necessary equipment for excavating the soil body, and device of the usage mining machine as pressing vacuum well point pipe can either
Meet the needs of sinking vacuum well point pipe, and very convenient, without the dress in addition purchasing and transporting special pressing vacuum well point pipe
It sets, not only improves working efficiency, but also save the cost.
Above embodiments are only to illustrate rather than limit the technical solution of the utility model, although referring to above-described embodiment pair
The utility model is described in detail, those skilled in the art should understand that: still can to the utility model into
Row modification or equivalent replacement should all without departing from any modification or partial replacement of the spirit and scope of the utility model
Cover in the scope of the claims of the utility model.
Claims (5)
1. integral type orients vacuum well point pipe, including outer tube, it is characterised in that: be arranged with inner tube, inner tube in outer tube
Outer diameter be less than outer tube internal diameter；Outer tube is threaded with downwards the short tube for surrounding setting pot, short tube, inner tube with
The axis of outer tube is same straight line；Short tube is 200 ± 2 millimeters high；
Short tube is welded with downwards partition；Partition is welded with downwards conulite, and conulite tip is arranged downward, hollow cone side
Wall offers several water outlets；
Inner tube bottom end is connected with partition, the partition in inner tube be equipped with through-hole, the through hole be equipped with for prevent water by
Conulite blows back into the check-valves of inner tube；
Inner tube top bending extendes back out the top side wall of outer tube；Toroidal cavity, partition are surrounded between outer tube and inner tube
Setting pot is surrounded with short tube and inner tube；Vacuum is equipped in toroidal cavity above setting pot to draw water area；
Vacuum draw water area top outer tube and inner tube between be equipped with sealing ring, outside sealing ring to the inner tube between setting pot
It is arranged on wall and plastic row water drum is installed, multiple protrusions are intervally distributed on plastic row water drum；
Vacuum draw water area bottom inner tube be equipped with multiple inner tube water inlets, circumferential direction of each inner tube water inlet in inner tube
On be uniformly distributed；Vacuum draw water area middle and upper part outer tube be equipped with multiple outer tube water inlets；The outer tube water inlet of bottom is high
Inner tube water inlet in the top；
Distribution of the outer tube water inlet in outer tube circumferential direction has following regularity:
Outer tube is divided into symmetrical two parts with plane where outer tube axis, each outer tube water inlet is evenly distributed on therein
In a part；
Geotextile layer is installed, the inner surface of geotextile layer is equipped with tubular on sealing ring to the outer layer inside pipe wall between setting pot
Metal net layer, multiple protrusions on the plastic row water drum with metal net layer snap fit；It is the outer wall of plastic row water drum, multiple
Drainage channel is surrounded between protrusion and the inner wall of metal net layer.
2. integral type orientation according to claim 1 vacuum well point pipe, it is characterised in that: the outer tube is seamless steel
Pipe, the inner tube are plastic tube.
3. integral type orientation according to claim 1 vacuum well point pipe, it is characterised in that: the partition is steel plate.
4. integral type orientation according to claim 1 vacuum well point pipe, it is characterised in that: inner tube water inlet is equipped with multilayer,
Every layer is equipped with multiple inner tube water inlets；
Two layers neighbouring of inner tube water inlet interlaced arrangement in the lateral direction.
5. integral type orientation according to claim 1 vacuum well point pipe, it is characterised in that: be equipped with tubular in the inner tube
Slide-valve, slide-valve outer diameter be less than 1-3 millimeters of internal layer bore；Its top is higher than most when slide-valve bottom end connects with partition
The inner tube water inlet of top；The density of slide-valve is less than the density of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821189372.3U CN208633130U (en) | 2018-07-26 | 2018-07-26 | Integral type orients vacuum well point pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821189372.3U CN208633130U (en) | 2018-07-26 | 2018-07-26 | Integral type orients vacuum well point pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208633130U true CN208633130U (en) | 2019-03-22 |
Family
ID=65737977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821189372.3U Withdrawn - After Issue CN208633130U (en) | 2018-07-26 | 2018-07-26 | Integral type orients vacuum well point pipe |
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| Country | Link |
|---|---|
| CN (1) | CN208633130U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708385A (en) * | 2018-07-26 | 2018-10-26 | 河南省水利第工程局 | Integral type orients vacuum well point pipe |
| CN111733847A (en) * | 2020-06-30 | 2020-10-02 | 浙江长锦建设有限公司 | A hydrophobic water guide device for foundation ditch construction |
| CN112900461A (en) * | 2021-01-19 | 2021-06-04 | 广州峻岭建设有限公司 | Drainage system for building construction site and use method |
| CN114875939A (en) * | 2022-04-19 | 2022-08-09 | 甘肃省景泰川电力提灌水资源利用中心 | Steel water collecting and sealing device |
-
2018
- 2018-07-26 CN CN201821189372.3U patent/CN208633130U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708385A (en) * | 2018-07-26 | 2018-10-26 | 河南省水利第工程局 | Integral type orients vacuum well point pipe |
| CN108708385B (en) * | 2018-07-26 | 2024-01-19 | 河南省水利第一工程局 | Integrated directional vacuum well point pipe |
| CN111733847A (en) * | 2020-06-30 | 2020-10-02 | 浙江长锦建设有限公司 | A hydrophobic water guide device for foundation ditch construction |
| CN112900461A (en) * | 2021-01-19 | 2021-06-04 | 广州峻岭建设有限公司 | Drainage system for building construction site and use method |
| CN112900461B (en) * | 2021-01-19 | 2021-11-19 | 广州峻岭建设有限公司 | Drainage system for building construction site and use method |
| CN114875939A (en) * | 2022-04-19 | 2022-08-09 | 甘肃省景泰川电力提灌水资源利用中心 | Steel water collecting and sealing device |
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