CN110042852A - A kind of construction method of deep-well point dewatering - Google Patents
A kind of construction method of deep-well point dewatering Download PDFInfo
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- CN110042852A CN110042852A CN201910237290.4A CN201910237290A CN110042852A CN 110042852 A CN110042852 A CN 110042852A CN 201910237290 A CN201910237290 A CN 201910237290A CN 110042852 A CN110042852 A CN 110042852A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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Abstract
The invention discloses a kind of construction method of deep-well point dewatering, solve the problems, such as that downcast well pipe installation at this stage is inconvenient.Its key points of the technical solution are that a kind of construction method of deep-well point dewatering, downcast well pipe is installed including step S500, the downcast well pipe includes more root unit well casings, the inner wall lower end of the unit well casing has the first mounting ring platform, the bottom surface of the first mounting ring platform is circumferentially evenly equipped at least three T shape convex blocks, the inner wall upper end of unit well casing has second mounting ring platform, the top surface of the second mounting ring platform has the sliding slot socket being inserted into for T shape convex block with one end of the T shape sliding slot and T shape sliding slot that cooperate with T shape convex block, using the construction method of above-mentioned deep-well point dewatering, the assembled simple and assembled quality of downcast well pipe is higher.
Description
Technical field
The present invention relates to a kind of construction techniques, more particularly to a kind of construction method of deep-well point dewatering.
Background technique
Deep-well point dewatering is in pattern foundation pit supporting structure using more precipitation method, and its advantages are that displacement is big, precipitation depth
Greatly, precipitation range is big etc..For the occasion that the infiltration coefficients such as sandy gravel stratum are very big and pervious bed thickness is big, generally with light well point and
The methods of injection classics can not prove effective, and the general construction method using deep-well point dewatering carries out precipitation.
The well casing used in deep-well point dewatering at this stage generally uses bellows and without sandpipe, due to bellows and without sand
The length of pipe is shorter, is needed in the construction of a deep-well point dewatering using tens of bellowss or without sandpipe, adjacent corrugations
Pipe or without sandpipe adapter tube it is relatively complicated and adapter tube quality it is also to be improved.
Summary of the invention
The object of the present invention is to provide a kind of construction methods of deep-well point dewatering, using the construction party of above-mentioned deep-well point dewatering
The assembled simple and assembled quality of method, downcast well pipe is higher.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of construction of deep-well point dewatering
Method includes the following steps: S100, measuring well location, using the control point of total station measurement precipitation well construction, makes a mark；
S200, embedded mouth guard tube；S300, drilling drill to form wellhole at control point using drilling machine；S400, borehole cleaning change slurry,
Direct circulation, which is carried out, using circulation drill empties wellhole；S500, installation downcast well pipe；The downcast well pipe includes more root unit wells
The inner wall lower end of pipe, the unit well casing has the first mounting ring platform, and the bottom surface of the first mounting ring platform is circumferentially evenly equipped at least three
A T shape convex block, the inner wall upper end of unit well casing have second mounting ring platform, and the top surface of the second mounting ring platform has and T shape
One end of T shape sliding slot and T shape sliding slot that convex block cooperates has the sliding slot socket being inserted into for T shape convex block；It is complete in the opening of wellhole
At the assembling of two root unit well casings, one root unit well casing of every assembling just makes whole downcast well pipe towards declining a spacing in wellhole
From until the bottom of downcast well pipe is abutted with the bottom of wellhole, and the top at least 0.5m above ground level of downcast well pipe；S600,
Rubble filtrate is filled out, rubble filtrate is circumferentially uniformly poured into the gap of wellhole and downcast well pipe；S700, well-flushing, in downcast well pipe
Wall is cleaned, until water is clear；S800, it draws water, the water in downcast well pipe is extracted out；S900, shut-in well.
By using above-mentioned technical proposal, adjacent cells well casing realizes rapid card by the cooperation of T shape convex block and T shape sliding slot
It connects, and contacting by the first mounting ring platform and second mounting ring platform, the cooperation being able to ascend between two root unit well casings
Intensity reduces the probability that downcast well pipe disintegrates.The construction method of above-mentioned deep-well point dewatering, can largely promote precipitation
The installation effectiveness of well casing, and promote the structural strength of downcast well pipe.
As a further improvement of the present invention, the top surface of the second mounting ring platform is equipped in the external circumferential of T shape sliding slot
The bottom of positioning ring groove, the first mounting ring platform is equipped with the convex cooperated with positioning ring groove in the external circumferential of T shape convex block
The depth of rib, the positioning ring groove is greater than location fin；Unit well casing when carrying out the installation of two root unit well casings, in downside
Second mounting ring platform locating slot in squeeze into a circle marine glue, then the T shape convex block of the unit well casing of upside is inserted into corresponding T
In shape annular groove, the unit well casing for rotating upside completes installation.
By using above-mentioned technical proposal, adjacent two are realized by the cooperation of location fin, positioning ring groove and marine glue
Sealed connection between root unit well casing can be avoided the underground water when drawing water step and pass through the gap between adjacent cells well casing
It penetrates into and influences effect of drawing water.
As a further improvement of the present invention, the bottom end of the downcast well pipe is equipped with screen pack, the screen pack
Top surface also have with the T shape convex block of unit well casing correspond and cooperate T shape sliding slot and with location fin cooperation determine
Position annular groove；Before downcast well pipe is mounted on wellhole, screen pack is mounted on to the bottom end of downcast well pipe.
By using above-mentioned technical proposal, the setting of screen pack can guarantee that the water entered in downcast well pipe keeps one
Fixed cleanliness, avoiding later period immersible pump, there is a phenomenon where block in the process of running.
As a further improvement of the present invention, being located at downcast well pipe the lowermost unit well casing is bottom well casing, institute
The lateral wall for stating bottom well casing offers inlet through hole, and the filtration gauze for being bonded its inner wall is equipped in the bottom well casing, and
Filtration gauze closes all inlet through hole lids.
By using above-mentioned technical proposal, the setting of inlet through hole can guarantee the enough normal inflow precipitation of the water energy in soil
In well casing, and the setting of filtration gauze can guarantee that the water flowed into downcast well pipe keeps certain cleanliness.
As a further improvement of the present invention, the outer diameter of the screen pack is greater than the outer diameter of unit well casing, and the mistake
The top surface of sieve plate is circumferentially uniformly provided at least three links；The downcast well pipe is installed using drop pipe device to wellhole, institute
State drop pipe device include locating support, with the one-to-one hoist engine of link quantity and be installed on locating support and unit well casing
Compatible abutment sleeve；Above-mentioned steps S500 further includes following steps: drop pipe device being mounted at wellhole, so that positioning sleeve
Cylinder and wellhole it is coaxial, then the rope of hoist engine is bundled on screen pack on corresponding link, by bottom well casing from up to
Down by abutment sleeve and being mounted on screen pack, rope is put so that screen pack is gradually reduced by hoist engine, works as bottom
When the top of portion's well casing is less than 30cm than being higher by distance at the top of abutment sleeve, unit well casing is mounted on to the top of bottom well casing
Portion.
By using above-mentioned technical proposal, the hoist engine dropped in pipe device can support entire dewatering well by screen pack
The decline of pipe, since screen pack is supported on the bottom of downcast well pipe and by T shape convex block and the installation of T shape sliding slot and bottom well casing
It is fixed, to ensure that stability of downcast well pipe during decline.Meanwhile positioning pipe sleeve can facilitate to downcast well pipe into
Row positioning can reduce downcast well pipe and the inner wall of wellhole during installing downcast well pipe and contradict, so that dewatering well
The installation of pipe is more smooth and more efficient.
As a further improvement of the present invention, the inner wall of the abutment sleeve is provided along its length positioning groove, institute
Stating unit well casing has and the one-to-one anticollision fin of positioning groove.
By using above-mentioned technical proposal, the mutual cooperation of anticollision fin and positioning groove is able to ascend drop pipe device pair
The positioning intensity of abutment sleeve avoids downcast well pipe and circumferentially rotates during the decline, to reduce to hoist engine
Unwrapping wire caused by influence.Meanwhile anticollision fin can be improved self-protection of downcast well pipe during decline, decline
It is if it happens rocked in journey, anticollision fin can abut to reduce the damage to downcast well pipe with the inner wall of wellhole.
As a further improvement of the present invention, the inner wall of the abutment sleeve is also equipped with one layer and pastes with unit well casing outer wall
The damping bed course of conjunction.
By using above-mentioned technical proposal, the setting for damping bed course is able to ascend between abutment sleeve inner wall and downcast well pipe
Maximum static friction force help to promote downcast well pipe steady during decline to slow down the decrease speed of downcast well pipe
It is qualitative.
As a further improvement of the present invention, the quantity of the quantity of the anticollision fin in the unit well casing and T shape convex block
It is identical, and anticollision fin is identical with the circumferential angle of T shape convex block.
As a further improvement of the present invention, the rope that the hoist engine uses is longer than 2 times of wellbore depth, step S500
Middle the step of rope is bundled in link, is as follows: by one end of rope by the both ends of rope after the link of screen pack
Binding, and packed up rope until in tension between rope and screen pack using hoist engine；When screen pack and
When the bottom of wellhole abuts, extra rope is taken out from hoist engine, and take out rope after rope both ends are unlocked.
By using above-mentioned technical proposal, the structure setting of above-mentioned hoist engine and corresponding rope can facilitate by rope from
It is disassembled on screen pack, and it is relatively simple to dismantle mode.
As a further improvement of the present invention, the drop pipe device further includes the tune for adjusting abutment sleeve horizontal position
Save component, it is described adjust component include circumferential four adjusting rods for being uniformly arranged on abutment sleeve lateral wall, with adjusting rod one by one
It is corresponding and for adjusting rod it is perforative adjust sleeve, be fixed on the feed screw nut for adjusting sleeve bottom, horizontal vertical in adjusting rod and
The adjusting screw of cooperation and the spindle motor of driving adjusting screw operation, the length of the adjusting rod are corresponded with feed screw nut
Degree is greater than the length of adjusting screw.
By using above-mentioned technical proposal, the setting of the adjusting component in pipe device is dropped, adjusting abutment sleeve can be facilitated
Horizontal position so that the alignment between abutment sleeve and wellhole.
In conclusion the invention has the following advantages:
1, a kind of construction method of deep-well point dewatering, by using novel downcast well pipe structure, between adjacent cells well casing
Relatively simple, cooperation intensity height, so that the structural strength and installation quality of entire downcast well pipe are improved, to simplify is installed
Step in downcast well pipe to wellhole is installed；
2, sealing is realized by the cooperation of positioning ring groove, location fin and marine glue between adjacent cells well casing, can be avoided miscellaneous
Matter, sewage are entered in downcast well pipe inner cavity by the gap between adjacent cells well casing, to promote whole downcast well pipe
Quality, to reduce the probability that deep water pump blocks in pump process；
3, the setting for dropping pipe device enables to the installation more steady and smooth of downcast well pipe, and reduces and drop during dropping pipe
The probability that well pipe and wellhole inner wall abut, to promote the quality of installation to the downcast well pipe in wellhole.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of downcast well pipe；
Fig. 2 is the diagrammatic cross-section of unit well casing；
Fig. 3 is the bottom substance schematic diagram of unit well casing；
Fig. 4 is the top structure schematic diagram of unit well casing；
Fig. 5 is the enlarged drawing in Fig. 4 at A；
Fig. 6 is the diagrammatic cross-section of bottom well casing；
Fig. 7 is the structural schematic diagram of screen pack；
Fig. 8 is the structural schematic diagram of dewatering device；
Fig. 9 is the diagrammatic cross-section of abutment sleeve.
In figure: 1, downcast well pipe；11, unit well casing；111, the first mounting ring platform；111a, T shape convex block；111b, convex
Rib；112, second mounting ring platform；112a, T shape sliding slot；112b, sliding slot socket；112c, positioning ring groove；12, bottom well casing；121,
Inlet through hole；122, filtration gauze；113, anticollision fin；13, screen pack；131, link；2, dewatering device；21, positioning branch
Frame；211, pedestal；211a, the first drop pipe through-hole；212, pipe platform drops；212a, the second drop pipe through-hole；213, support post；22,
Hoist engine；23, abutment sleeve；231, positioning groove；232, bed course is damped；24, component is adjusted；241, adjusting rod；242, it adjusts
Sleeve；243, feed screw nut；244, adjusting screw；245, spindle motor.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Refering to attached drawing 1 and attached drawing 8, a kind of construction method of deep-well point dewatering applies a kind of novel deep-well point dewatering
Equipment.Deep well point precipitation apparatus includes a downcast well pipe 1 and a dewatering device 2, so that the installation of downcast well pipe 1 is more simple
Just, and the quality of installation to the downcast well pipe 1 in wellhole is more ideal.
Refering to attached drawing 1, a kind of downcast well pipe 1, the filter screen including more root unit well casings 11 and positioned at 1 bottom of downcast well pipe
Plate 13.
Refering to attached drawing 2 and attached drawing 3, the inner wall lower end of unit well casing 11 has the first mounting ring platform 111, the first mounting ring platform
111 bottom surface is circumferentially evenly equipped at least three T shape convex block 111a.
Refering to attached drawing 2, attached drawing 4 and attached drawing 5, the inner wall upper end of unit well casing 11 has second mounting ring platform 112, the second peace
The top surface for filling land 112 has with one end of the T shape sliding slot 112a and T shape sliding slot 112a that cooperate with T shape convex block 111a for T shape
The sliding slot socket 112b of convex block 111a insertion.
In the present embodiment, unit well casing 11 is arranged there are three T shape convex block 111a on the first mounting ring platform 111, and single
First well casing 11 is equipped with and the one-to-one three T shape sliding slot 112a of T shape convex block 111a on second mounting ring platform 112.
Refering to attached drawing 2, in order to promote the cooperation intensity of adjacent cells well casing 11, unit well casing 11 is in second mounting ring platform
112 top surface is circumferentially with positioning ring groove 112c, and positioning ring groove 112c is located at the outside of T shape sliding slot 112a；Unit well casing 11
The location fin 111b cooperated with positioning runner is equipped in the bottom surface of the first mounting ring platform 111；Wherein, the depth of positioning ring groove 112c
Degree is greater than the height of location fin 111b.When carrying out the installation of adjacent cells well casing 11, using marine glue by location fin
111b and positioning ring groove 112c cooperation.
Refering to attached drawing 1 and attached drawing 6, the unit well casing 11 positioned at 1 least significant end of downcast well pipe is bottom well casing 12.Bottom well casing
12 lateral wall offers inlet through hole 121, the filtration gauze 122 for being bonded its inner wall is equipped in bottom well casing 12, and filter
All inlet through hole 121 are covered and are closed by gauze 122.In the present embodiment, the lateral wall of bottom well casing 12 is circumferentially evenly equipped with logical into water
Hole 121, and filtration gauze 122 is fixed in the bottom of bottom well casing 12 by nail.
Refering to attached drawing 3 and attached drawing 7, the top surface of screen pack 13 also has with the T shape convex block 111a of unit well casing 11 one by one
Corresponding and cooperation the T shape sliding slot 112a and positioning ring groove 112c with location fin 111b cooperation.The structure of screen pack 13
Setting enables screen pack 13 to pass through T shape sliding slot 112a and T shape convex block 111a, positioning ring groove 112c and location fin 111b
Cooperation realize and bottom well casing 12 installation cooperate.
Whole screen pack 13 is in disk-shaped, and has the filtering through-hole inside and outside connection downcast well pipe 1 at its end face center.
The outer diameter of screen pack 13 is greater than unit well casing 11, and its top surface is circumferentially uniformly provided at least three links 131, and link 131 is equal
Positioned at the outside of bottom well casing 12.In the present embodiment, there are three links 131 for the top tool of screen pack 13.
Refering to attached drawing 1, in order to reduce the damage that downcast well pipe 1 may cause during decline and when hole wall abuts
Wound, the lateral wall of unit well casing 11 all have the anticollision fin 113 being arranged along its length, wherein anticollision fin 113 is by bullet
Property rubber is made, and is fixed by screws on the lateral wall of unit well casing 11.
In the present embodiment, the lateral wall of a root unit well casing 11 is arranged circumferentially there are three anticollision fin 113, and three
A anticollision fin 113 and T shape convex block 111a(are refering to attached drawing 3) it corresponds, and it is identical as the circumferential angle of T shape convex block 111a.
Refering to attached drawing 8, a kind of dewatering device 2, the link 131 including locating support 21 and downcast well pipe 1 is correspondingly
Hoist engine 22, be installed on locating support 21 and abutment sleeve 23 compatible with downcast well pipe 1 and adjust abutment sleeve 23
The adjusting component 24 of position.In the present embodiment, dewatering device 2 includes three hoist engines 22.
Locating support 21 includes being installed on the pedestal 211 of bottom surface, the drop pipe platform 212 above pedestal 211 and branch
Support the support post 213 between pedestal 211 and drop pipe platform 212.Wherein, there is the first drop pipe through-hole at 211 center of pedestal
211a, three hoist engines 22 are arranged circumferentially along the first drop pipe through-hole 211a.
Abutment sleeve 23 and adjusting component 24 are mounted on drop pipe platform 212, and operator also stands in drop pipe platform
The installation of unit well casing 11 is carried out on 212.The center for dropping pipe platform 212 is equipped with the opposite with the first drop pipe through-hole 211a
Two drop pipe through-hole 212a, abutment sleeve 23 drop pipe through-hole 212a, and the hole of the second drop pipe through-hole 212a through second from top to bottom
Diameter is greater than the outer diameter of abutment sleeve 23, and abutment sleeve 23 is slid in the second drop pipe through-hole 212a.
Adjusting component 24 includes circumferential four adjusting rods 241 and adjusting rod for being uniformly arranged on 23 lateral wall of abutment sleeve
241 correspond and for adjusting rod 241 it is perforative adjust sleeve 242, be fixed on adjust 242 bottom of sleeve feed screw nut 243,
Horizontal vertical is in adjusting rod 241 and corresponds the adjusting screw 244 of cooperation with feed screw nut 243 and drives adjusting screw
The spindle motor 245 of 244 operations.The length of adjusting rod 241 is greater than the length of adjusting screw 244.By the setting of above structure,
It can ensure abutment sleeve 23 in the sliding of horizontal plane, and the structure of above-mentioned adjusting component 24 is simple, easy to operate, degree of regulation
It is higher.
The inner wall of abutment sleeve 23 is provided along its length the anticollision fin 113(with unit well casing 11 refering to attached drawing 1)
The positioning groove 231 of cooperation.And the inner wall of abutment sleeve 23 is also equipped with the damping bed course being bonded with 11 outer wall of unit well casing
232.The structure setting of above-mentioned abutment sleeve 23, the maximum being able to ascend between 11 outer wall of abutment sleeve 23 and unit well casing is quiet to rub
Power is wiped, to alleviate the decrease speed of downcast well pipe 1, to promote the smooth decreasing of downcast well pipe 1.
In conjunction with attached drawing 1 to attached drawing 9, a kind of construction method of deep-well point dewatering includes the following steps:
S100, side well setting position after levelling of the land, using the control point of total station measurement precipitation well construction, make a mark, register hole
Position；
S200, embedded mouth guard tube, mouth guard tube use the steel bushing of 4mm~6mm, and mouth guard tube buried depth is 1.4m~1.7m；
S300, drilling, after levelling of the land near hole location, it is fat that drilling machine reaches hole location, is drilled and forms wellhole；
S400, borehole cleaning change slurry, carry out direct circulation using circulation drill and empty wellhole；
S500, installation downcast well pipe 1, drop pipe device is mounted at wellhole, so that abutment sleeve 23 and wellhole coaxial arrangement, it will
Rope one end of hoist engine 22 pass through screen pack 13 on link 131 on, and by the both ends of rope binding after, practical elevator
Machine 22 is packed up rope until in tension between rope and screen pack 13；
Bottom well casing 12 is passed through to abutment sleeve 23 from top to bottom and is mounted on screen pack 13, hoist 22 makes
Bottom well casing 12 declines, until the top of bottom well casing 12, which is higher by distance than the top of abutment sleeve 23, is less than 30cm, by unit
Well casing 11 is mounted on the top of bottom well casing 12；
Constantly decline downcast well pipe 1, when the distance from top that the top of downcast well pipe 1 is higher by abutment sleeve 23 is less than 30cm, then
Next root unit well casing 11 is installed；
When the bottom of downcast well pipe 1 is abutted with the bottom of wellhole, extra rope is taken out from hoist engine 22, and will rope
Rope is taken out after unlocking at sub- both ends；
S600, rubble filtrate is filled out, rubble filtrate is circumferentially uniformly poured into the gap of wellhole and downcast well pipe 1, medium stone filtrate
High-ranking military officer's device is removed after metaling fills up the gap between wellhole and downcast well pipe 1 for 2mm~5mm；
S700, well-flushing clean 1 inner wall of downcast well pipe using high-pressure hydraulic pump, until water can stop clearly borehole cleaning；
S800, it draws water, immersible pump is put into downcast well pipe 1 by lifting rope, and drop to bottom well casing 12 in downcast well pipe 1
Place draws water, and immersible pump whole day does not listen operating, until foundation pit construction is completed；
Precipitation pipeline is filled out envelope by S900, shut-in well, practical cement slurry.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of construction method of deep-well point dewatering, which comprises the steps of: S100, measuring well location use whole station
Instrument measures the control point of precipitation well construction, makes a mark；
S200, embedded mouth guard tube；
S300, drilling drill to form wellhole at control point using drilling machine；
S400, borehole cleaning change slurry, carry out direct circulation using circulation drill and empty wellhole；
S500, installation downcast well pipe (1)；The downcast well pipe (1) includes more root unit well casings (11), the unit well casing (11)
Inner wall lower end have the first mounting ring platform (111), the bottom surface of the first mounting ring platform (111) is circumferentially evenly equipped at least three T shapes
The inner wall upper end of convex block (111a), unit well casing (11) has second mounting ring platform (112), the second mounting ring platform (112)
Top surface with the T shape sliding slot (112a) and T shape sliding slot (112a) that cooperate with T shape convex block (111a) one end have for T shape it is convex
The sliding slot socket (112b) of block (111a) insertion；
The assembling of two root unit well casings (11) is completed in the opening of wellhole, one root unit well casing (11) of every assembling just makes whole
Downcast well pipe (1) is towards certain distance is declined in wellhole, until the bottom of downcast well pipe (1) is abutted with the bottom of wellhole, and precipitation
The top of well casing (1) at least 0.5m above ground level；
S600, rubble filtrate is filled out, rubble filtrate is circumferentially uniformly poured into the gap of wellhole and downcast well pipe (1)；
S700, well-flushing clean downcast well pipe (1) inner wall, until water is clear；
S800, it draws water, the water in downcast well pipe (1) is extracted out；
S900, shut-in well.
2. a kind of construction method of deep-well point dewatering according to claim 1, which is characterized in that the second mounting ring platform
(112) top surface is equipped with positioning ring groove (112c) in the external circumferential of T shape sliding slot (112a), the first mounting ring platform (111)
Bottom be equipped with the location fin (111b) that cooperates with positioning ring groove (112c) in the external circumferential of T shape convex block (111a), it is described
The depth of positioning ring groove (112c) is greater than location fin (111b)；
When carrying out the installation of two root unit well casings (11), in the second mounting ring platform (112) of the unit well casing (11) of downside
A circle marine glue is squeezed into locating slot, then the T shape convex block (111a) of the unit well casing (11) of upside is inserted into corresponding T shape annular groove
Interior, the unit well casing (11) for rotating upside completes installation.
3. a kind of construction method of deep-well point dewatering according to claim 2, which is characterized in that the downcast well pipe (1)
Bottom end be equipped with screen pack (13), the top surface of the screen pack (13) also has the T shape convex block with unit well casing (11)
(111a) one-to-one correspondence and the T shape sliding slot (112a) of cooperation and the positioning ring groove (112c) cooperated with location fin (111b)；
Before downcast well pipe (1) is mounted on wellhole, screen pack (13) is mounted on to the bottom end of downcast well pipe (1).
4. a kind of construction method of deep-well point dewatering according to claim 3, which is characterized in that be located at the downcast well pipe
(1) the lowermost unit well casing (11) is bottom well casing (12), and the lateral wall of the bottom well casing (12) offers inlet through hole
(121), the filtration gauze (122) for being bonded its inner wall is equipped in the bottom well casing (12), and filtration gauze (122) will own
Inlet through hole (121) lid closes.
5. a kind of construction method of deep-well point dewatering according to claim 4, which is characterized in that the screen pack (13)
Outer diameter be greater than the outer diameter of unit well casing (11), and the top surface of the screen pack (13) is circumferentially uniformly provided at least three links
(131)；The downcast well pipe (1) is installed using drop pipe device to wellhole, the drop pipe device include locating support (21) and
It the one-to-one hoist engine of link (131) quantity (22) and is installed on locating support (21) and is adapted with unit well casing (11)
Abutment sleeve (23)；
Above-mentioned steps S500 further includes following steps: drop pipe device being mounted at wellhole, so that abutment sleeve (23) and wellhole
Coaxially, then the rope of hoist engine (22) is bundled on screen pack (13) on corresponding link (131), by bottom well casing
(12) from top to bottom by abutment sleeve (23) and being mounted on screen pack (13), by hoist engine (22) put rope so that
Screen pack (13) is gradually reduced, when the top of bottom well casing (12) is less than 30cm than being higher by distance at the top of abutment sleeve (23)
When, unit well casing (11) is mounted on to the top of bottom well casing (12).
6. a kind of construction method of deep-well point dewatering according to claim 5, which is characterized in that the abutment sleeve (23)
Inner wall be provided along its length positioning groove (231), the unit well casing (11) has and positioning groove (231) one is a pair of
The anticollision fin (113) answered.
7. a kind of construction method of deep-well point dewatering according to claim 6, which is characterized in that the abutment sleeve (23)
Inner wall be also equipped with one layer of damping bed course (232) being bonded with unit well casing (11) outer wall.
8. a kind of construction method of deep-well point dewatering according to claim 7, which is characterized in that the unit well casing (11)
The quantity of interior anticollision fin (113) is identical as the quantity of T shape convex block (111a), and anticollision fin (113) and T shape convex block
The circumferential angle of (111a) is identical.
9. a kind of construction method of deep-well point dewatering according to claim 8, which is characterized in that the hoist engine (22) makes
The step of rope is longer than 2 times of wellbore depth, and rope is bundled in link (131) in step S500 is as follows: will restrict
The both ends of rope are bound after the link (131) of screen pack (13) in one end of son, and will be restricted using hoist engine (22)
Son is packed up until in tension between rope and screen pack (13)；
When the bottom of screen pack (13) and wellhole abuts, extra rope is taken out from hoist engine (22), and will rope
Rope is taken out after unlocking at sub- both ends.
10. a kind of construction method of deep-well point dewatering according to claim 9, which is characterized in that the drop pipe device is also
Including the adjusting component (24) for adjusting abutment sleeve (23) horizontal position, the adjusting component (24) includes circumferentially uniformly setting
It is placed in four adjusting rods (241) of abutment sleeve (23) lateral wall, corresponded with adjusting rod (241) and for adjusting rod (241)
It is perforative to adjust sleeve (242), be fixed on the feed screw nut (243) for adjusting sleeve (242) bottom, horizontal vertical in adjusting rod
(241) and with feed screw nut (243) it corresponds the adjusting screw (244) of cooperation and drives adjusting screw (244) operation
Spindle motor (245), the length of the adjusting rod (241) are greater than the length of adjusting screw (244).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110528543A (en) * | 2019-08-05 | 2019-12-03 | 中国二十冶集团有限公司 | A kind of dewatering construction method |
| CN111456054A (en) * | 2020-04-14 | 2020-07-28 | 山东大学 | Pipe well structure suitable for high-permeability alluvial stratum, precipitation construction system and precipitation construction method |
| CN112252346A (en) * | 2020-09-11 | 2021-01-22 | 北京市市政二建设工程有限责任公司 | Construction method of dewatering well |
| CN113186962A (en) * | 2021-05-25 | 2021-07-30 | 中建五局华东建设有限公司 | Well point dewatering method and device suitable for soft land |
| CN113325162A (en) * | 2021-08-02 | 2021-08-31 | 长安大学 | Air-entrapping zone soil water-gas-heat data acquisition system based on Internet |
| CN113605429A (en) * | 2021-08-11 | 2021-11-05 | 惠州市惠阳区第二建筑工程有限公司 | Construction process of dewatering well |
| CN114411787A (en) * | 2022-02-10 | 2022-04-29 | 中铁广州工程局集团有限公司 | Well point dewatering method for steel cofferdam in water |
| CN114658016A (en) * | 2022-04-06 | 2022-06-24 | 中建八局第一建设有限公司 | Recoverable dewatering well pipe structure and mounting structure and construction method thereof |
| CN115434351A (en) * | 2022-09-28 | 2022-12-06 | 山西冶金岩土工程勘察有限公司 | Construction system and construction method of open type foundation pit dewatering well |
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| CN111456054A (en) * | 2020-04-14 | 2020-07-28 | 山东大学 | Pipe well structure suitable for high-permeability alluvial stratum, precipitation construction system and precipitation construction method |
| CN111456054B (en) * | 2020-04-14 | 2021-04-30 | 山东大学 | Pipe well structure suitable for high-permeability alluvial stratum, precipitation construction system and precipitation construction method |
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| CN113186962B (en) * | 2021-05-25 | 2023-06-02 | 中建五局华东建设有限公司 | Well point dewatering method and device suitable for soft soil |
| CN113186962A (en) * | 2021-05-25 | 2021-07-30 | 中建五局华东建设有限公司 | Well point dewatering method and device suitable for soft land |
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| CN113325162B (en) * | 2021-08-02 | 2021-12-07 | 长安大学 | Air-entrapping zone soil water-gas-heat data acquisition system based on Internet |
| CN113605429A (en) * | 2021-08-11 | 2021-11-05 | 惠州市惠阳区第二建筑工程有限公司 | Construction process of dewatering well |
| CN113605429B (en) * | 2021-08-11 | 2022-06-21 | 惠州市惠阳区第二建筑工程有限公司 | Construction process of dewatering well |
| CN114411787A (en) * | 2022-02-10 | 2022-04-29 | 中铁广州工程局集团有限公司 | Well point dewatering method for steel cofferdam in water |
| CN114411787B (en) * | 2022-02-10 | 2022-12-02 | 中铁广州工程局集团有限公司 | Well point dewatering method for steel cofferdam in water |
| CN114658016A (en) * | 2022-04-06 | 2022-06-24 | 中建八局第一建设有限公司 | Recoverable dewatering well pipe structure and mounting structure and construction method thereof |
| CN114658016B (en) * | 2022-04-06 | 2023-07-25 | 中建八局第一建设有限公司 | Recoverable dewatering well pipe structure and mounting structure and construction method thereof |
| CN115434351A (en) * | 2022-09-28 | 2022-12-06 | 山西冶金岩土工程勘察有限公司 | Construction system and construction method of open type foundation pit dewatering well |
| CN115434351B (en) * | 2022-09-28 | 2024-05-10 | 山西冶金岩土工程勘察有限公司 | Construction system and construction method of open foundation pit dewatering well |
| CN115538955A (en) * | 2022-12-05 | 2022-12-30 | 天津大学 | Drill rod capable of quickly forming filter screen segment and using method thereof |
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