CN110331732A - Foundation pit Dewatering by pressure reduction system and construction method - Google Patents
Foundation pit Dewatering by pressure reduction system and construction method Download PDFInfo
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- CN110331732A CN110331732A CN201910693491.5A CN201910693491A CN110331732A CN 110331732 A CN110331732 A CN 110331732A CN 201910693491 A CN201910693491 A CN 201910693491A CN 110331732 A CN110331732 A CN 110331732A
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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
Abstract
The present invention relates to foundation pit Dewatering by pressure reduction system and construction methods, hang hoop using guiding cuff, well casing and control sinking direction and the rate of position cable control downcast well pipe；The dirt of downcast well pipe side wall is recycled by collecting the channel space that trough floor and collecting tank sidewall enclose；Block vertical plate and the annular conduit laid of flexible block are formed on sliding slot bottom plate using sliding slot vertical plate；School position cuff and pipe side school position body are set on the outside of drinking-water pipe, are provided with rigid connection pipe, flexible steel in flat section tubing and connection vertical bar in drinking-water pipe connecting part；On the outside of downcast well pipe and top is respectively provided with the first enclosure pouches and the second enclosure pouches；The plate and second that intercepts water of setting first intercepts water plate in the first bottling body, and can apply lateral pressure on top surface to third water-stop sheet and water proof side plate by intumescent filler body.The present invention can promote the laying quality of downcast well pipe and pipe side obturator, reduce downcast well pipe remove contamination and draw water construction difficulty, improve the globality of plugging structure.
Description
Technical field
The invention belongs to base pit engineering fields, are related to a kind of laying matter that can promote downcast well pipe and pipe side obturator
Amount, reduce downcast well pipe remove contamination and draw water construction difficulty, improve plugging structure globality foundation pit Dewatering by pressure reduction system and apply
Work method is suitable for foundation pit Dewatering by pressure reduction construction work.
Background technique
During excavation, the water level of foundation pit inner side and outer side is often the main points of base pit stability control.It is real
When border is constructed, Dewatering by pressure reduction well is generallyd use to control the water level in influence of foundation excavation region, the construction quality of dewatering well
It would generally be significant to engineering dewatering influential effect with efficiency.
The prior art has a kind of foundation pit high water head Dewatering by pressure reduction well shut-in well structure, including protruding into drawing in dewatering well well casing
Flow steel pipe and the water-stopping steel ring flat-plate in dewatering well well casing；It drains steel pipe and steel pipe and lower part drainage steel pipe is drained by top
At top drains steel pipe and lower part drainage steel pipe is flexibly connected by screw thread；Lower part water-stopping steel ring flat-plate and top water-stopping steel ring flat-plate
Steel pipe is drained with lower part by welding to connect；Lower part drains steel pipe top and is equipped with plug, and plug and lower part drainage steel pipe top are logical
Cross thread seal connection；Be successively arranged from the bottom up between lower part water-stopping steel ring flat-plate and top water-stopping steel ring flat-plate clay layers of balls with
Concrete layer one；Concrete layer two is equipped with above the seal ring steel plate of top.Though the constructing structure can solve foundation pit high water head pressure-bearing
Water draws water problem, however, place can be promoted by remaining in terms of promoting dewatering well construction efficiency, improving.
Shown in sum up, existing construction technology achieves preferable construction effect under suitable operating condition, but is improving precipitation
The laying quality of well casing and pipe side obturator reduces downcast well pipe and removes contamination and draw water the construction technologies such as difficulty of construction, and mentioning
Deficiency is remained in terms of the globality for rising plugging structure.
Summary of the invention
The purpose of the present invention is to provide a kind of laying quality that can not only promote downcast well pipe and pipe side obturator, and
And downcast well pipe can be reduced and removed contamination and draw water the difficulty of construction, the foundation pit Dewatering by pressure reduction of plugging structure globality can also be improved
System and construction method.
To realize the above-mentioned technical purpose, the present invention provides a kind of construction method of foundation pit Dewatering by pressure reduction system, including following
Construction procedure: 1) preparation of construction；2) downcast well pipe is hung；3) pipe side obturator filling construction；4) downcast well pipe is removed contamination construction；5)
The setting of downcast well pipe enclosing；6) well extracardiac pumping device is laid；7) water plug is laid in well；8) dewatering well closure construction.
Another invention according to the present invention, a foundation pit foundation pit Dewatering by pressure reduction system of the invention, according to the construction mentioned thereon
Method constructs to obtain.
The present invention has the characteristics that following and beneficial effect
(1) present invention limits the sinking direction of downcast well pipe by guiding cuff flexibility, and hangs hoop and control position by well casing
Drag-line dynamic controls the fall rate of downcast well pipe, improves the accuracy of downcast well pipe sinking control.
(2) tube top cap of the present invention is connect with downcast well pipe by cap side lantern ring, and drop guide funnel passes through close with the periphery soil body
Close gasket ring connection, the synchronous stability by balance hoist enhancing structure, can effective lift structure self-stable ability.
(3) present invention can control the connection of frid squeegee and downcast well pipe by squeegee control position bolt, and can lead to
The dirt for collecting the flute profile cavity recycling downcast well pipe side wall that trough floor and collecting tank sidewall enclose is crossed, dirt removal is promoted
Efficiency and quality.
(4) present invention is by sliding slot vertical plate in the conduit that sliding slot bottom plate forms block vertical plate and flexible block annular is laid, drop
The difficulty that low downcast well pipe enclosing is laid；Strip light band is circumferentially set on the outside of block vertical plate and flexible block, it can be into one
Step improves the effect of security protection.
(5) pipe side stay frame and pipe side school position body is arranged in the present invention on the outside of drinking-water pipe, and accurate control position can be carried out to drinking-water pipe；
Meanwhile it being provided with rigid connection pipe, flexible steel in flat section tubing and connection vertical bar in drinking-water pipe connecting part, it can effectively reduce drinking-water pipe company
The difficulty connect；Water plug can move together with mobile dagger, reduce the difficulty that water plug installation is laid.
(6) it is connected between the closed capping of the present invention and downcast well pipe by the convex falcon in base and base closed loop, drop can be reduced
The difficulty that well pipe is laid；The present invention is on the outside of downcast well pipe simultaneously and top is respectively provided with the first enclosure pouches and the second envelope
Pouch is closed, and can realize quick, the dual-seal to downcast well pipe by force (forcing) pump.
(7) present invention setting first in the first bottling body plate and second that intercepts water intercepts water plate, and makes second to intercept water plate and folder
Muscle interlayer is connected, and can effectively promote the globality of the first bottling body；Meanwhile the present invention passes through intumescent filler body to third water-stop sheet
And water proof side plate applies lateral pressure on top surface, and the vertical deformation of the second bottling body can be controlled by prestressing force pressing plate, it can be further
Improve the water proof effect of structure.
Detailed description of the invention
Fig. 1 is foundation pit Dewatering by pressure reduction system construction process figure of the present invention；
Fig. 2 is that Fig. 1 downcast well pipe hangs constructing structure schematic diagram；
Fig. 3 is Fig. 2 guiding cuff and downcast well pipe attachment structure schematic diagram；
Fig. 4 is Fig. 1 pipe side obturator filling constructing structure schematic diagram；
Fig. 5 is that Fig. 1 downcast well pipe is removed contamination constructing structure schematic diagram；
Fig. 6 is Fig. 5 cell wall squeegee structural facades schematic diagram；
Fig. 7 is Fig. 5 cell wall squeegee structure transverse face schematic diagram；
Fig. 8 is Fig. 1 dewatering well enclosing structural plan layout drawing；
Fig. 9 is Fig. 8 block vertical plate and sliding slot connecting structure of bottom plate schematic diagram；
Figure 10 is Fig. 1 well extracardiac pumping device layout diagram；
Figure 11 is Figure 10 pipe side school position body and pipe side stay frame connecting structure schematic diagram；
Figure 12 is water plug layout stracture schematic diagram in Fig. 1 well；
Figure 13 is Fig. 1 dewatering well closure construction structural schematic diagram；
Figure 14 is Figure 13 the first bottling body constructing structure schematic diagram；
Figure 15 is that Figure 13 and Figure 14 first intercepts water plate auxiliary locator schematic diagram.
In figure: 1- downcast well pipe；2- precipitation pit shaft；The periphery the 3- soil body；4- controls position bottom plate；5- controls position dagger；6- controls position support
Plate；7- is oriented to cuff；8- well casing hangs hoop；9- controls position drag-line；10- drag-line pulling machine；11- connection hanging ring；12- tube top cap；13-
Drop guide funnel；14- cap side lantern ring；The closed gasket ring of 15-；16- balances hoist；17- filler filling pipe；18- pipe side obturator；19-
Lift sunpender；20- collects trough floor；21- cell wall squeegee；22- squeegee control position bolt；23- collecting tank sidewall；24- cell wall row
Water hole；25- squeegee shaft；26- sliding slot bottom plate；27- block vertical plate；28- flexibility block；29- sliding slot vertical plate；30- vertical plate connects
Bar；31- strip light band；32- drinking-water pipe；The school 33- position cuff；34- pipe side school position body；35- moves dagger；36- column bottom cross plate；
The capital 37- transverse slat；38- shifting roller；39- absolute altitude adjusts body；40- rigid connection pipe；41- flexible steel in flat section tubing；42- fastening hoop
Ring；43- immersible pump；44- water pump hanging ring；45- water pump hoist cable；The first enclosure pouches of 46-；The closed capping of 47-；48- second is closed
Pouch；The convex falcon in the base 49-；The base 50- closed loop；51- caping ballast body；52- first intercepts water plate；Slot is hung in 53- connection；54- is rigid
Property sunpender；55- auxiliary positioning pipe；56- geotechnique's interlayer；57- reinforcement interlayer；58- second intercepts water plate；The first bottling body of 59-；60-
Third intercepts water plate；The second bottling body of 61-；62- prestressing force pressing plate；The capping of 63- tube bottom；64- connection anchor pier；65- rigidity cuff；
66- flexibility cuff；67- rigid flight；68- flexibility connecting plate；The school 69- position screw rod；The school 70- position bolt；The school 71- position support；The school 72-
Position shaft；73- support bottom plate；74- support upright bar；75- support diagonal brace；76- water plug；77- draws water connecting tube；78- second
Connect transverse slat；The connection transverse slat of 79- first；80- connection vertical bar；81- link rotatable hinge；82- compressed air line；83- force (forcing) pump；84-
Hang slot connecting rod；85- connection flexural pivot；86- water proof side plate；87- plate top connecting plate；88- board bottom connecting plate；89- permeates connecting hole；
90- intumescent filler body；91- pier top crossbeam；92- pressurization bolt；93- well side obturator；94- funnel connecting rod；95- well casing passes through
Hole；96- guide blot；97- controller perturbation bar.
Specific embodiment
Downcast well pipe makes construction technical requirement, on-site hoisting construction technical requirement, rolling of sectional iron and welding procedure technology
It is required that, bolt fastening construction technical requirement etc., repeated no more in present embodiment, emphasis illustrates that the present invention relates to the implementations of method
Mode.
Fig. 1 is foundation pit Dewatering by pressure reduction system construction process figure of the present invention, referring to Fig.1 shown in, foundation pit Dewatering by pressure reduction system and
Construction method, including following construction procedure:
1) preparation of construction: the review of downcast well pipe (1) field position determines concrete mix and on-site construction processes, quasi-
The material and device that standby construction needs；
2) downcast well pipe is hung: setting control position bottom plate (4) and control position on the periphery soil body (3) on the outside of precipitation pit shaft (2)
Dagger (5), control position dagger (5) are placed in control position bottom plate (4), in the top of control position dagger (5) setting control position fagging (6)；It will drop
Well pipe (1) is lifted to the top of precipitation pit shaft (2), and downcast well pipe (1) is made to pass through the guiding cuff on the inside of control position dagger (5)
(7) after, well casing is set on the side wall of downcast well pipe (1) and hangs hoop (8), make to control position drag-line (9) one end and control on position fagging (6)
Drag-line pulling machine (10) is connected, and the other end hangs the connection hanging ring (11) on hoop (8) side wall with well casing and connects, by controlling position drag-line
(9) the decentralization height of downcast well pipe (1) is controlled；
3) pipe side obturator filling construction: after the completion of downcast well pipe (1) sinking, by tube top cap (12) and drop guide funnel
(13) it connects integral；So that the cap side lantern ring (14) of tube top cap (12) bottom end is connected firmly with downcast well pipe (1), makes guide
The closed gasket ring (15) of funnel (13) bottom end is completely embedded with the periphery soil body (3)；In drop guide funnel (13) and tube top cap (12)
Between be arranged funnel connecting rod (22), balance hoist (16) be connected to funnel connecting rod (22), pass through balance hoist (16) control
The stability of drop guide funnel (13) and tube top cap (12) fills pipe (17) to the cavity on the outside of downcast well pipe (1) by filler
Interior filling pipe side obturator (18)；
4) downcast well pipe is removed contamination construction: make to lift sunpender (19) bottom end and is connected with trough floor (20) are collected, lifting sunpender
(19) squeegee control position bolt (22) are set between side wall and cell wall squeegee (21), collect trough floor (20) and collecting tank sidewall
(23) it connects, cell wall squeegee (21) rotation is connected to collecting tank sidewall (23), and cell wall is arranged on collecting tank sidewall (23) and arranges
Water hole (24) and squeegee shaft (25), make squeegee shaft (25) be connected with cell wall squeegee (21)；
5) downcast well pipe enclosing is arranged: being orderly arranged outside each block vertical plate (27) and sliding slot bottom plate in downcast well pipe (1)
(26), block the flexible block (28) of setting between vertical plate (27), make to block vertical plate (27) and flexible block (28) together along the chute
The sliding slot vertical plate (29) of bottom plate (26) upper surface slides, and block vertical plate (27) and sliding slot vertical plate (29) is made to pass through vertical plate connecting rod (30)
Connection；Circumferentially strip light band (31) are set on the outside of block vertical plate (27) and flexible block (28)；
6) well extracardiac pumping device is laid: the inner wall of well side obturator (93) and downcast well pipe (1) on the outside of downcast well pipe (1)
It removes contamination after the completion of construction, drinking-water pipe (32) is inserted to the top of tube bottom capping (63), high-ranking officers' position cuff (33) is set to drinking-water pipe
(32) outside, and by the lateral position of pipe side school position body (34) control drinking-water pipe (32), wherein pipe side school position body (34) is set
In on the periphery soil body (3) and being located at precipitation pit shaft two sides, the both ends of mobile dagger (35) respectively with column bottom cross plate (36) and capital
After transverse slat (37) is connected firmly, mobile dagger (35) are moved to setting by the shifting roller (38) for first passing through column bottom cross plate (36) lower part
Position, then the flatness by absolute altitude adjusting body (39) adjustment column bottom cross plate (36) under column bottom cross plate (36)；Drinking-water pipe (32)
The rigid connection pipe (40) and flexible steel in flat section tubing (41) being connected to each other is arranged in outside, and makes rigid connection pipe (40) and drinking-water pipe
(32) it is welded to connect, connect flexible steel in flat section tubing (41) by fastening garter spring (42) with connecting tube of drawing water (77)；
7) water plug is laid in well: insertion drinking-water pipe (32) and immersible pump (43) inside downcast well pipe (1), and makes to take out
Water pipe (32) is completely embedded with immersible pump (43)；Make the water pump hanging ring (44) of immersible pump (43) two sides and water pump hoist cable (45) phase
Even, water pump hoist cable (45) is placed in the closed capping (47) on the periphery soil body (3)；In the outside of drinking-water pipe (32), the first envelope is set
Pouch (46) are closed, the second enclosure pouches are set between closed capping (47) and well side obturator (93) and the periphery soil body (3)
(48),；The convex falcon in base (49) are set in closed capping (47) lower surface, base closed loop is set with downcast well pipe (1) joint
(50)；In the upper surface of closed capping (47), caping ballast body (51) are set；It draws water when constructing, by force (forcing) pump (83) to first
Enclosure pouches (46) and the second enclosure pouches (48) pressurization promote the air-tightness of downcast well pipe (1), then are taken out by immersible pump (43)
Water；
8) dewatering well closure construction: make first to intercept water the inside of plate (52) and connection is hung after slot (53) is connected firmly, pass through
Rigid hanger (54) intercepts water first in plate (52) the indentation periphery soil body (3), and slot is hung in the rotary-top connection that slot (53) is hung in connection
Connecting rod (84), opposite slot connecting rod (84) rotation of hanging of mirror image connect rigid hanger (54)；The outside of auxiliary positioning pipe (55) according to
The geotechnological interlayer (56) of secondary setting and reinforcement interlayer (57), lateral wall and second intercept water plate (58) be welded to connect；First by the first perfusion
Body (59) perfusion intercept water to second plate (58) top after, then auxiliary positioning pipe (55) are taken out, then third intercept water plate
(60) it is placed in setting position；The second bottling body (61) pouring construction is first carried out, and is filled by prestressing force pressing plate (62) control second
The deformation of injection body (61).
In step 2), the bottom end setting tube bottom of downcast well pipe (1) side wall covers (63), and water seepage hole is arranged in side wall；Guiding
Cuff (7) is spliced by rigid cuff (65) and flexible cuff (66) to be formed, and rigid cuff (65) and guide blot (96) is made to hang down
Directly connect；Guide blot (96) is formed by screw rod and bolt combination, and the screw rod of bolt two sides is that hand of spiral is opposite；Control position support
Plate (6) is formed using steel plate rolling, and drag-line pulling machine (10) are arranged thereon, and well casing through hole (95) are arranged in intermediate position.
In step 3), tube top cap (12) is in cone, bottom end and cap side lantern ring (14) vertical connection；Cap side lantern ring
(14) internal diameter is identical as the outer diameter of downcast well pipe (1), is formed using steel plate rolling；Drop guide funnel (13) is in truncated cone-shaped, and top
Circular diameter is greater than bottom circular diameter, and bottom circular diameter is identical as the outer diameter of pipe side obturator (18), in drop guide funnel (13) and pipe
Funnel connecting rod (94) are set between overhead guard cap (12)；Closed gasket ring (15) uses rubber slab or plastic plate, is in circular ring shape, and with
Drop guide funnel (13) pastes connection.
In step 4), cell wall squeegee (21) is made of rigid flight (67) and flexible connecting plate (68)；Rigid flight
(67) fan-shaped, it is formed using steel plate rolling；Flexible connecting plate (68) is triangular in shape or fan-shaped, pastes and connects with rigid flight (67)
Or it is connected by holdfast；Squeegee control position bolt (22) is using spring or the assembly of screw rod and bolt, when using screw rod and bolt
When assembly, the screw rod of bolt two sides is that hand of spiral is opposite.
In step 5), flexibility block (28) and block vertical plate (27) are by pasting connection or being connected by holdfast.Bar shaped
Light belt (31) uses the LED light strip of sparkling.
In step 6), pipe side school position body (34) You Jiaowei screw rod (69) He Jiaowei bolt (70) is formed, and makes school position spiral shell
The school position screw rod (69) of bolt (70) two sides is connect with school position cuff (33) He Jiaowei support (71) by school position shaft (72) respectively；
The screw threads for fastening of the school position screw rod (69) of school position bolt (70) two sides is contrary；School position support (71) is set to the periphery soil body (3)
On, it is made of support bottom plate (73) and support upright bar (74), support diagonal brace is set between support beam bottom plate and support upright bar (74)
(75)；Column bottom cross plate (36) cross section is rectangle, and two mobile daggers (35) are arranged on every piece of column bottom cross plate (36)；Capital is horizontal
Water plug (76) and connecting tube of drawing water (77) are set on plate (37)；Connecting tube of drawing water (77) and drinking-water pipe (32) use diameter phase
Same steel pipe, is arranged the second connection transverse slat (78) on connecting tube of drawing water (77), and the first connection cross is arranged on drinking-water pipe (32)
Plate (79), and setting connection vertical bar (80) between the second connection transverse slat (78) and the first connection transverse slat (79)；Connect vertical bar
(80) it connect transverse slat (79) with first by link rotatable hinge (81) connection, connect transverse slat (78) with second and is bolted；
Rigid connection pipe (40) and flexible steel in flat section tubing (41) paste connection, and internal diameter is identical as drinking-water pipe (32) outer diameter.
In step 7), the first enclosure pouches (46) and the second enclosure pouches (48) are all made of sheet rubber and suture；The
One enclosure pouches (46) cross section is in circular ring shape, and round paste with drinking-water pipe (32) in inside connects, top and compressed air line (82)
Connection；Second enclosure pouches (48) cross section is rounded or rectangle, side are connected to compressed air line (82)；Compressed air line (82) is adopted
With steel pipe or pvc pipe, it is connected with force (forcing) pump (83)；Force (forcing) pump (83) uses water pump or compression pump.
In step 8), first intercepts water plate (52) plane in circular ring shape, is formed using stainless-steel sheet or the copperplate rolling；Even
It connects and hangs slot (53) width and intercept water compared with first 1~3cm of plate (52) thickness；The both ends for hanging slot connecting rod (84) pass through connection flexural pivot (85) respectively
Slot (53) is hung with connection and rigid hanger (54) is connect；Setting controller perturbation bar between slot (53) is hung in the opposite connection of mirror image
(97)；Second plate (58) that intercepts water is formed using steel plate rolling, is connected with auxiliary positioning pipe (55) by screw；Third intercepts water plate
(60) plane is in circular ring shape, and circumferentially water proof side plate (86) are arranged in outside；It intercepts water the upper table of plate (60) intermediate gaps in third
Plate top connecting plate (87) and board bottom connecting plate (88) is respectively set in face and lower surface, and infiltration is arranged on plate top connecting plate (87)
Connecting hole (89)；It intercepts water setting in cavity that plate (60) encloses in plate top connecting plate (87), board bottom connecting plate (88) and third
Intumescent filler body (90)；Intumescent filler body (90) uses the waterglass or cement of water-swellable；Prestressing force pressing plate (62) and pier top
Crossbeam (91) is connected by pressurization bolt (92), and the position of prestressing force pressing plate (62) can be controlled by pressurization bolt (92)；Pier
It is connected between head piece (91) and the periphery soil body (3) by connecting anchor pier (64), passes through screw connection with pressurization bolt (92).
Referring to shown in Fig. 2~Figure 15, foundation pit Dewatering by pressure reduction system and construction method hang hoop using guiding cuff (7), well casing
(8) and control position drag-line (9) control downcast well pipe (1) sinking direction and rate；By collecting trough floor (20) and collecting tank side
The dirt of flute profile cavity recycling downcast well pipe (1) side wall that wall (23) encloses；Using sliding slot vertical plate (29) in sliding slot bottom plate
(26) block vertical plate (27) and the annular conduit laid of flexible block (28) are formed；The setting school position cuff on the outside of drinking-water pipe (32)
(33) and pipe side school position body (34), drinking-water pipe (32) connecting part be provided with rigid connection pipe (40), flexible steel in flat section tubing (41)
With connection vertical bar (80)；On the outside of downcast well pipe (1) and top is respectively provided with the first enclosure pouches (46) and the second closing capsule
Bag (48)；The plate (52) and second that intercepts water of setting first intercepts water plate (58) in the first bottling body (59), and can pass through intumescent filler
Body (90) applies lateral pressure on top surface to third water-stop sheet and water proof side plate (86).
Downcast well pipe (1) well depth 30m, is made of Φ 273 × 3mm steel pipe.Precipitation pit shaft (2) is drilled using drilling machine
It forms, a diameter of 50cm.The periphery soil body (3) is the cohesive soil of hard plastic state.Position bottom plate (4) are controlled using the steel with a thickness of 10mm
Plate rolls.Control position dagger (5) use specification for 200 × 200 × 8 × 12 H profile steel.Control position fagging (6) using with a thickness of
The steel plate of 4mm is made.Guiding cuff (7) is composed of two pieces of rigid cuffs (65) and two pieces of flexible cuffs (66), and height is
For 20cm, formed wherein the arc chord angle of rigidity cuff (65) uses for 150 ° with a thickness of the steel plate rolling of 2mm；Flexible cuff (66)
Using the rubber slab with a thickness of 2mm, with rigid cuff (65) by pasting connection.Well casing hangs hoop (8) using the steel with a thickness of 2mm
Plate rolls.Control the wirerope that position drag-line (9) use diameter 10mm.Drag-line pulling machine (10) uses electrical hoist.Connection
Hanging ring (11) is made of the plain bar of diameter 10mm, is hung hoop (8) with well casing and is welded to connect.Tube top cap (12), guide leakage
Bucket (13) and cap side lantern ring (14) are all made of and form with a thickness of the steel plate rolling of 1mm, and tube top cap (12) cross section is in isosceles
Triangle, the angle with horizontal plane are 60 °；The angle of drop guide funnel (13) and horizontal plane is 60 °.Closed gasket ring (15) is using thick
Degree is that the rubber slab of 2mm is cut.Hoist (16) are balanced using the sand pocket of weight 20kg.Filler filling pipe (17) use diameter for
The tube material of 20cm is made.Pipe side obturator (18) uses close-graded medium coarse sand material.It lifts sunpender (19) and uses diameter
The steel pipe of 60mm is made.It collects trough floor (20) and collecting tank sidewall (23) is all made of and cuts with a thickness of the steel plate of 2mm.Slot
Wall squeegee (21) is made of rigid flight (67) and flexible connecting plate (68)；Wherein rigid flight (67) is fan-shaped, using thickness
It is formed for the steel plate rolling of 2mm；Flexible connecting plate (68) uses and is made with a thickness of the rubber slab material of 2mm；Rigid flight (67) and
Flexible connecting plate (68) pastes connection.Squeegee control position bolt (22) uses diameter to be composed slot for the screw rod of 22mm and bolt
Wall drainage hole (24) width is 1cm, is highly 3cm.Squeegee shaft (25) uses diameter for the stainless rotating steel shaft of 10mm.Sliding slot
Bottom plate (26) is used and is made with a thickness of the steel plate of 2mm.Vertical plate (27) are blocked using the steel plate with a thickness of 10mm, height is
50cm.Flexibility block (28) uses rope mesh grid, connects with block vertical plate (27) binding.Sliding slot vertical plate (29) uses thickness
The steel plate of 2mm is made, and is highly 20cm, connect with sliding slot bottom plate (26) vertical welding.Vertical plate connecting rod (30) uses diameter 22mm
Screw rod and bolt form.Strip light band (31) uses the LED light strip of sparkling.Drinking-water pipe (32) and connecting tube of drawing water (77) are equal
Using the steel pipe of 10cm.School position cuff (33) is used and is formed with a thickness of the steel plate rolling of 1mm.Pipe side school position body (34) You Jiaowei spiral shell
Bar (69) He Jiaowei bolt (70) composition；Its lieutenant colonel position screw rod (69) uses the stainless steel screw rod of diameter 30mm；School position bolt
(70) stainless steel bolt of internal diameter 30mm, and the screw threads for fastening direction phase of school position bolt (70) two sides school position screw rod (69) are used
Instead.The school position shaft (72) of school position screw rod (69) end uses the stainless rotating steel shaft of diameter 30mm.Mobile dagger (35) are using straight
Diameter 100mm, thickness 2mm steel pipe be made.Column bottom cross plate (36) and capital transverse slat (37) using the steel plate rolling with a thickness of 2mm and
At.Shifting roller (38) uses 6 cun of rigid plastics wheel.Absolute altitude adjusts the bolt and screw combinations that body (39) use diameter 30mm
It forms.Rigid connection pipe (40) is placed on the top of drinking-water pipe (32), and is welded to connect with drinking-water pipe (32).Flexible steel in flat section tubing (41)
Using rubber hose, pastes and connect with rigid connection pipe (40).Fastening garter spring (42) uses width for the hose clamp of 2cm.Immersible pump
(43) use 220v motor lift for the sewage type water pump of 60m.Water pump hanging ring (44) is rolled using the reinforcing bar of diameter 10mm.
Water pump hoist cable (45) uses the wirerope of diameter 10mm.First enclosure pouches (46) and the second enclosure pouches (48) are all made of thickness
It is sutured for the sheet rubber of 0.2mm.Closed capping (47) is using the concrete slab with a thickness of 100mm.The convex falcon in base (49) is horizontal
Section is in isosceles trapezoid, is highly 5cm, top width 30cm.Base closed loop (50) is using the rubber slab material system with a thickness of 1cm
At.Caping ballast body (51) uses weight for the precast concrete block of 50kg.First intercepts water plate (52) plane in circular ring shape, uses
It is rolled with a thickness of the stainless-steel sheet of 2mm.Connection hangs slot (53) clear span and intercepts water compared with first plate (52) big 2cm, using thickness
It is formed for steel plate rolling, groove depth 5cm, plane is arc-shaped, and central angle is 60 °；It is axially and symmetrically set along auxiliary positioning pipe (55)
Set two pieces.Rigid hanger (54) is made of the tube material of diameter 60mm.Auxiliary positioning pipe (55) uses diameter for 30cm's
Tube material is made, and is connected through a screw thread with second plate (58) that intercepts water.Geotechnological interlayer (56) uses non-woven geotextile material.Reinforcement
Interlayer (57) uses steel wire net materials.Second intercepts water plate (58) using the steel plate rolling with a thickness of 10mm, with auxiliary positioning pipe
(55) connection screw thread is arranged in joint.First bottling body (59) uses strength grade for the pea gravel concreten of C35.Third intercepts water plate
(60) plane is in circular ring shape, is rolled using with a thickness of the stainless-steel sheet of 5mm.Second bottling body (61) uses strength grade
The impervious concrete for being P6 for C40, antiseepage grade.Prestressing force pressing plate (62) is used and is formed with a thickness of the steel plate rolling of 10mm.Pipe
Underseal lid (63) is used and is formed with a thickness of the steel plate rolling of 2mm.Connection anchor pier (64) is made of the steel pipe of diameter 60mm.School position
Support (71) is set on the periphery soil body (3), is made of support bottom plate (73) and support upright bar (74)；Its intermediate support frame bottom plate (73) is adopted
Formed with a thickness of the steel plate rolling of 10mm, support upright bar (74) use specification for 100 × 100 × 6 × 8 H profile steel.Support is oblique
Support (75) is made of the spiral of diameter 25mm.Water plug (76) uses the suction pump of voltage 220v, lift 60m.The
Two connections transverse slat (78) and the first connection transverse slat (79) are all made of and are made with a thickness of the steel plate of 2mm.Vertical bar (80) are connected using straight
The stainless steel screw rod of diameter 30mm.Link rotatable is cut with scissors (81) and is cut with scissors using the directional rotating of diameter 30mm.Compressed air line (82) is using straight
The steel pipe of diameter 20mm.Force (forcing) pump (83) uses compression pump.Slot connecting rod (84) are hung to form using the steel pipe rolling of diameter 30mm.Connection
Flexural pivot (85) is cut with scissors using the directional rotating of diameter 30mm.Water proof side plate (86) is used and is rolled with a thickness of the rubber slab of 2mm.Plate
Top connecting plate (87) and board bottom connecting plate (88) are all made of and cut with a thickness of the rubber slab of 2mm, intercept water plate (60) with third
Joint is using stickup connection.Infiltration connecting hole (89) diameter is 10mm.Intumescent filler body (90) uses the water glass of water-swellable
Glass.Pier top crossbeam (91) is highly width 20cm, 5cm using forming with a thickness of the steel plate rolling of 2mm.Pressurization bolt (92)
Use diameter for the stainless steel bolt of 30mm.Well side obturator (93) uses the grit material of uniform grading.Funnel connecting rod
(94) it is rolled using the reinforcing bar of diameter 25mm.Well casing through hole (95) diameter is compared with downcast well pipe (1) big 20mm.Guide blot
(96) it is formed by the screw rod and bolt combination of diameter 30mm, and the screw rod of bolt two sides is that hand of spiral is opposite.Controller perturbation bar
(97) spring material of diameter 2cm is used.
Claims (9)
1. the construction method of foundation pit Dewatering by pressure reduction system, it is characterised in that including following construction procedure:
1) preparation of construction: the review of downcast well pipe (1) field position determines concrete mix and on-site construction processes, prepares to apply
The material and device that work needs；
2) downcast well pipe is hung: setting control position bottom plate (4) and control position dagger on the periphery soil body (3) on the outside of precipitation pit shaft (2)
(5), control position dagger (5) is placed in control position bottom plate (4), in the top of control position dagger (5) setting control position fagging (6)；By dewatering well
The top of (1) lifting to precipitation pit shaft (2) is managed, and downcast well pipe (1) is made to pass through the guiding cuff (7) on the inside of control position dagger (5)
Afterwards, well casing is set on the side wall of downcast well pipe (1) and hangs hoop (8), make to control position drag-line (9) one end and controls the drawing on position fagging (6)
Rope pulling machine (10) is connected, and the other end hangs the connection hanging ring (11) on hoop (8) side wall with well casing and connects, by controlling position drag-line (9)
Control the decentralization height of downcast well pipe (1)；
3) pipe side obturator filling construction: after the completion of downcast well pipe (1) sinking, even by tube top cap (12) and drop guide funnel (13)
It connects integral；So that the cap side lantern ring (14) of tube top cap (12) bottom end is connected firmly with downcast well pipe (1), makes drop guide funnel
(13) the closed gasket ring (15) with the periphery soil body (3) of bottom end are completely embedded；Between drop guide funnel (13) and tube top cap (12)
It is arranged funnel connecting rod (22), balance hoist (16) is connected to funnel connecting rod (22), controls guide by balance hoist (16)
The stability of funnel (13) and tube top cap (12) is filled pipe (17) by filler and is filled out into the cavity on the outside of downcast well pipe (1)
Fill pipe side obturator (18)；
4) downcast well pipe is removed contamination construction: being made to lift sunpender (19) bottom end and is connected with trough floor (20) are collected, lifts sunpender (19)
Squeegee control position bolt (22) are set between side wall and cell wall squeegee (21), collect trough floor (20) and collecting tank sidewall (23) even
It connects, cell wall squeegee (21) rotation is connected to collecting tank sidewall (23), and cell wall drainage hole is arranged on collecting tank sidewall (23)
(24) and squeegee shaft (25), squeegee shaft (25) is made to be connected with cell wall squeegee (21)；
5) downcast well pipe enclosing is arranged: being orderly arranged outside each block vertical plate (27) and sliding slot bottom plate (26) in downcast well pipe (1), blocks
Flexible block (28) is set between net vertical plate (27), makes to block vertical plate (27) and flexible block (28) bottom plate (26) along the chute together
The sliding slot vertical plate (29) of upper surface slides, and connect block vertical plate (27) by vertical plate connecting rod (30) with sliding slot vertical plate (29)；?
It blocks vertical plate (27) and circumferentially strip light band (31) is arranged in flexible block (28) outside；
6) well extracardiac pumping device is laid: the inner wall of well side obturator (93) and downcast well pipe (1) on the outside of downcast well pipe (1) is removed contamination
After the completion of construction, drinking-water pipe (32) is inserted to the top of tube bottom capping (63), high-ranking officers' position cuff (33) is set to drinking-water pipe (32)
Outside, and by the lateral position of pipe side school position body (34) control drinking-water pipe (32), wherein pipe side school position body (34) is placed in periphery
On the soil body (3) and be located at precipitation pit shaft two sides, the both ends of mobile dagger (35) respectively with column bottom cross plate (36) and capital transverse slat
(37) after being connected firmly, mobile dagger (35) are moved to setting position by the shifting roller (38) for first passing through column bottom cross plate (36) lower part
It sets, then adjusts the flatness of body (39) adjustment column bottom cross plate (36) by the absolute altitude under column bottom cross plate (36)；Drinking-water pipe (32) is outside
The rigid connection pipe (40) and flexible steel in flat section tubing (41) being connected to each other is arranged in side, and makes rigid connection pipe (40) and drinking-water pipe (32)
Connection connect flexible steel in flat section tubing (41) by fastening garter spring (42) with connecting tube of drawing water (77)；
7) water plug is laid in well: insertion drinking-water pipe (32) and immersible pump (43) inside downcast well pipe (1), and makes drinking-water pipe
(32) it is connect with immersible pump (43)；The water pump hanging ring (44) of immersible pump (43) two sides is set to be connected with water pump hoist cable (45), water pump is hung
Rope (45) is placed in the closed capping (47) on the periphery soil body (3)；In the outside of drinking-water pipe (32), the first enclosure pouches are set
(46), the second enclosure pouches (48) are set between closed capping (47) and well side obturator (93) and the periphery soil body (3),；?
The convex falcon in base (49) are arranged in closed capping (47) lower surface, and base closed loop (50) are arranged with downcast well pipe (1) joint；Close
Close upper surface setting caping ballast body (51) of capping (47)；It draws water when constructing, by force (forcing) pump (83) to the first enclosure pouches
(46) it pressurizes with the second enclosure pouches (48), then is drawn water by immersible pump (43)；
8) dewatering well closure construction: make first to intercept water the inside of plate (52) and connection is hung after slot (53) is connected firmly, pass through rigidity
Sunpender (54) intercepts water first in plate (52) the indentation periphery soil body (3), and slot connecting rod is hung in the rotary-top connection that slot (53) is hung in connection
(84), what mirror image was opposite hangs slot connecting rod (84) rotation connection rigid hanger (54)；It is successively set in the outside of auxiliary positioning pipe (55)
Set geotechnological interlayer (56) and reinforcement interlayer (57), lateral wall and second are intercepted water plate (58) welded connecting；First by the first bottling body
(59) after the top for plate (58) of intercepting water to second is perfused, then by auxiliary positioning pipe (55) taking-up, third is then intercepted water into plate (60)
It is placed in setting position；The second bottling body (61) pouring construction is first carried out, and controls the second bottling body by prestressing force pressing plate (62)
(61) deformation.
2. the construction method of foundation pit Dewatering by pressure reduction system according to claim 1, it is characterised in that: in step 2), dewatering well
The bottom end setting tube bottom for managing (1) side wall covers (63), and water seepage hole is arranged in side wall；Cuff (7) are oriented to by rigid cuff (65) and soft
Property cuff (66) splice composition, and make rigid cuff (65) and guide blot (96) vertical connection；Guide blot (96) is by screw rod
It is formed with bolt combination, and the screw rod of bolt two sides is that hand of spiral is opposite；Control position fagging (6) is formed using steel plate rolling,
Well casing through hole (95) are arranged in upper setting drag-line pulling machine (10), intermediate position.
3. the construction method of foundation pit Dewatering by pressure reduction system according to claim 1, it is characterised in that: in step 3), tube top cover
In cone, bottom end connects cap (12) with cap side lantern ring (14)；The outer diameter phase of cap side lantern ring (14) internal diameter and downcast well pipe (1)
Together；Drop guide funnel (13) is in truncated cone-shaped, and top circular diameter is greater than bottom circular diameter, bottom circular diameter and pipe side obturator (18)
Outer diameter it is identical, between drop guide funnel (13) and tube top cap (12) be arranged funnel connecting rod (94)；Closed gasket ring (15) is in
Circular ring shape, and connect with drop guide funnel (13).
4. the construction method of foundation pit Dewatering by pressure reduction system according to claim 1, it is characterised in that: in step 4), cell wall is scraped
Pulpboard (21) is made of rigid flight (67) and flexible connecting plate (68)；Rigid flight (67) is in fan；Flexible connecting plate (68) is in triangle
Shape or sector are pasted connection with rigid flight (67) or are connected by holdfast；Squeegee control position bolt (22) uses spring or screw rod
With the assembly of bolt, when using screw rod and bolt combination body, the screw rod of bolt two sides is that hand of spiral is opposite.
5. the construction method of foundation pit Dewatering by pressure reduction system according to claim 1, it is characterised in that: in step 5), flexible blocking
By pasting connection or being connected by holdfast, strip light band (31) uses the LED light of sparkling for net (28) and block vertical plate (27)
Band.
6. the construction method of foundation pit Dewatering by pressure reduction system according to claim 1, it is characterised in that: in step 6), pipe side school
Position body (34) You Jiaowei screw rod (69) He Jiaowei bolt (70) forms, and makes the school position screw rod (69) point of school position bolt (70) two sides
It is not connect with school position cuff (33) He Jiaowei support (71) by school position shaft (72)；The school position screw rod of school position bolt (70) two sides
(69) screw threads for fastening is contrary；School position support (71) is set on the periphery soil body (3), by support bottom plate (73) and support upright bar
(74) it forms, support diagonal brace (75) is set between support beam bottom plate and support upright bar (74)；Column bottom cross plate (36) cross section is in length
It is rectangular, two mobile daggers (35) are set on every piece of column bottom cross plate (36)；On capital transverse slat (37) be arranged water plug (76) and
Connecting tube of drawing water (77)；Connecting tube of drawing water (77) and drinking-water pipe (32) use the identical steel pipe of diameter, in connecting tube of drawing water (77)
Upper the second connection transverse slat (78) of setting, is arranged the first connection transverse slat (79), and connect transverse slat second on drinking-water pipe (32)
(78) setting connection vertical bar (80) between the first connection transverse slat (79)；Connection vertical bar (80) connect transverse slat (79) with first and passes through
Link rotatable cuts with scissors (81) connection, connect transverse slat (78) with second and is bolted；Rigid connection pipe (40) and flexible steel in flat section tubing
(41) connection is pasted, internal diameter is identical as drinking-water pipe (32) outer diameter.
7. the construction method of foundation pit Dewatering by pressure reduction system according to claim 1, it is characterised in that: in step 7), the first envelope
Pouch (46) cross section is closed in circular ring shape, inside circle is connect with drinking-water pipe (32), and top is connected to compressed air line (82)；Second
Enclosure pouches (48) cross section is rounded or rectangle, side are connected to compressed air line (82)；Compressed air line (82) using steel pipe or
Pvc pipe is connected with force (forcing) pump (83)；Force (forcing) pump (83) uses water pump or compression pump.
8. the construction method of foundation pit Dewatering by pressure reduction system according to claim 1, it is characterised in that: in step 8), first section
Water plate (52) plane is in circular ring shape, is formed using stainless-steel sheet or the copperplate rolling；Connection hangs slot (53) width and intercepts water compared with first
Plate (52) is thick；The both ends for hanging slot connecting rod (84) pass through connection flexural pivot (85) respectively and connection hangs slot (53) and rigid hanger (54) even
It connects；Setting controller perturbation bar (97) between slot (53) is hung in the opposite connection of mirror image；Second intercepts water plate (58) and auxiliary positioning pipe
(55) it is connected by screw；Third intercepts water plate (60) plane in circular ring shape, and circumferentially water proof side plate (86) are arranged in outside；?
Plate top connecting plate (87) and board bottom connecting plate (88) is respectively set in three upper and lower surfaces for intercepting water plate (60) intermediate gaps, and
Setting infiltration connecting hole (89) on plate top connecting plate (87)；It is cut in plate top connecting plate (87), board bottom connecting plate (88) and third
Intumescent filler body (90) are set in the cavity that water plate (60) encloses；Intumescent filler body (90) using water-swellable waterglass or
Cement；Prestressing force pressing plate (62) is connect with pier top crossbeam (91) by pressurization bolt (92), and can be controlled by pressurization bolt (92)
The position of prestressing force pressing plate (62) processed；It is connected between pier top crossbeam (91) and the periphery soil body (3) by connecting anchor pier (64), and is added
Press bolt (92) connection.
9. a kind of foundation pit Dewatering by pressure reduction system, which is characterized in that by any foundation pit Dewatering by pressure reduction body of claims 1 to 8
The construction method of system constructs to obtain.
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| CN110804948A (en) * | 2019-10-31 | 2020-02-18 | 安徽省路港工程有限责任公司 | Construction method of steel pipe pile bailey truss foundation full-space bracket system |
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