CN108049424A - Sunk type basement structure - Google Patents
Sunk type basement structure Download PDFInfo
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- CN108049424A CN108049424A CN201711313226.7A CN201711313226A CN108049424A CN 108049424 A CN108049424 A CN 108049424A CN 201711313226 A CN201711313226 A CN 201711313226A CN 108049424 A CN108049424 A CN 108049424A
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- basement
- sidewall
- pipe
- reversed beam
- bottom board
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of sunk type basement structure, it is characterized in that sidewall of basement width is 400~450mm, sidewall of basement bottom sets cutting shoe, cutting shoe gradient is 50~60 degree, sidewall of basement sets lower counterbore, and lower counterbore distance is 0.8~1.2m, a diameter of 130~160mm of lower counterbore；Lower immersed tube and extraction mud pipe are set in lower counterbore, sinking pipe end sets spiral steel disc drill bit, there are qi of chong channel ascending adversely pipe and jet water spout in lower immersed tube, also set up extraction mud pipe in lower counterbore, pre-buried steel sludge out pipe in cutting shoe, a diameter of 40~60mm of steel sludge out pipe, steel sludge out pipe is coupled by ring flange with extraction mud pipe, ring flange middle pad rubber gasket, blending bolt locking, it is ensured that connector is tightly water-tight.Mechanical property of the present invention is good, low cost, short time limit.
Description
Technical field
The present invention relates to a kind of sunk type basement structure, suitable for building field.
Background technology
Traditional Construction of Basement pattern is first to install basement supporting construction, then is cut the earth, then is poured ground
Lower cell structure, since the earth excavation time is longer, basement supporting construction as temporary support structures come ensure to have safely compared with
Big difficulty, basement supporting construction will take a substantial amount of time, and the cost is relatively high.When how to solve basement structure construction
Duration slow cost height is engineering staff's problem to be faced.
The content of the invention
The present invention is to provide a kind of sunk type basement structure, overcomes fabric structure safety insufficient, of high cost, long in time limit
The problem of.
The present invention first pours sidewall of basement, forms peripheral frame by the use of sidewall of basement as basement temporary support structures
Structure, then the sidewall of basement that sinks treat that sidewall of basement sinks down into designated position, then pour basement floor constructions, basement
Base arrangement construction period can be with one layer structure floor of synchronous construction.
Sidewall of basement width is 400~450mm, and sidewall of basement bottom sets cutting shoe, and cutting shoe gradient is 50~60 degree,
Here gradient refers to cutting shoe inclined-plane and horizontal angle, and sidewall of basement sets lower counterbore, adjacent lower counterbore distance for 0.8~
1.2m, a diameter of 130~160mm of lower counterbore；Set lower immersed tube and extraction mud pipe, sinking pipe end that spiral steel disc is set in lower counterbore
Drill bit has qi of chong channel ascending adversely pipe and jet water spout in lower immersed tube, also sets up extraction mud pipe in lower counterbore, pre-buried steel sludge out pipe in cutting shoe, steel mud extraction
Pipe diameter is 40~60mm, and steel sludge out pipe is coupled by ring flange with extraction mud pipe, ring flange middle pad rubber gasket, and uses spiral shell
Bolt-lock is tight, it is ensured that connector is tightly water-tight.
Basement bottom board bottom absolute altitude is identical with the top mark height of sidewall of basement cutting shoe.Foundation soil is strong below basement bottom board
When degree is more than or equal to 8MPa, basement bottom board is only set；Below basement bottom board foundation soil strength be less than 8MPa and more than etc.
When 2MPa, basement bottom board and basement reversed beam be set, adjacent basement reversed beam spacing is 1.2~1.5m, basement reversed beam
Width is 300mm, and basement reversed beam height is 250~300mm, and longitudinal basement reversed beam and horizontal basement reversed beam form well
Shape, basement reversed beam are disposed below cement mixing pile, rubber spacer, rubber pad are set between cement mixing pile and basement reversed beam
Layer thickness is 10~15mm, and the purpose of setting rubber spacer is to reduce rigidity at the top of cement mixing pile, be conducive to cement mixing
Stake and the common load of soil；When foundation soil strength is less than 2MPa below basement bottom board, set basement bottom board and basement anti-
Beam, adjacent basement reversed beam spacing are 1.4~1.7m, and basement reversed beam width is 300mm, basement reversed beam height for 300~
400mm, longitudinal basement reversed beam and horizontal basement reversed beam form well shape, and longitudinal basement reversed beam and horizontal basement reversed beam are handed over
Vent, which is put, is disposed below minor diameter prefabricated pile, a diameter of 200~250mm of minor diameter prefabricated pile；
Different technical solutions is used for different soil properties, plays the role of ensureing safety and saving construction cost, for
Basement bottom board lower part is pan soil soil property, can only be met the requirements by the pressure-bearing of basement bottom board and ground soil contact face；And
It is weak soil soil property for basement bottom board lower part, must just uses basement process, the technical program provides two kinds of processing methods, right
In relatively hard weak soil, basement process is carried out using minor diameter prefabricated pile, minor diameter prefabricated pile is rigid pile, it will directly build
It builds load and is directly delivered to foundation soil depths.
Basement bottom board lower part is pan soil soil property, i.e., when foundation soil strength is more than or equal to 8MPa, construction procedure is：
(1) sidewall of basement template is installed, indwelling lower counterbore during sidewall of basement formwork erection, in cutting shoe position pre-buried steel
Sludge out pipe binds sidewall of basement reinforcing bar, then pours sidewall of basement concrete；
(2) extraction mud pipe is put into lower counterbore after sidewall of basement concrete reaches design strength 100%, in extraction mud pipe
The mounting flange between steel sludge out pipe；
(3) lower immersed tube is put into lower counterbore, in order to reduce the smooth sinking of frictional force first examination bath before sinking, when examination is washed by water
Air compressor machine is opened, centrifugal water pump is opened when air compressor machine air pressure reaches 0.4MPa；The sky being connected with qi of chong channel ascending adversely pipe is started during sinking
Press, and the water pump with jet water spout is started simultaneously, it rotates synchronously spiral steel disc drill bit and sinks, hindered in sinking watching according to soil
Power adjusts hydraulic pressure and air pressure in time, and hydraulic pressure and pressure control are in 0.8~1.2MPa；It is pressed in when the hydraulic pressure of jet water spout is gentle under drill bit
When portion is gone out at center, the husky aqueous mixtures of formation enter extraction mud pipe since high pressure is acted on from steel sludge out pipe, open and take out when sinking
Mud machine extracts the soil in extraction mud pipe out；Stop bath when sidewall of basement sinks down into 0.5~0.8m of more than designed elevation,
It rotates spiral steel disc drill bit and sinks down into designated position；
(4) the brick fetal membrane of basement bottom board is installed, the reinforcing bar of basement bottom board is bound, pours basement bottom board；
(5) lower counterbore inside sidewall of basement template is closed；Lower counterbore closing is swollen in C30 using C30 expansive concretes
Accelerated cement slurry is first injected before swollen concrete construction, the hole at steel sludge out pipe and cutting shoe position can be blocked after accelerated cement slurry injection
Hole；
(6) one layer concrete floor of construction；
Lower counterbore and a layer concrete floor slab construction inside closing sidewall of basement template can be mixed with basement bottom board
Soil synchronous construction is coagulated to accelerate progress.
Basement bottom board lower part is weak soil soil property, i.e., when foundation soil strength is less than 8MPa and is more than or equal to 2MPa, construction step
Suddenly it is：
(1) construction cement mixing pile；
Technical parameter is selected as follows：Grouting pressure is less than 1.0MPa, and flow rate of grouting is 130~150L/min, soil cement 28d
Intensity is more than 0.8MPa.Cement mixing pile drilling machine subsidence velocity is less than 1.2m/min, promotes speed and is less than 0.8m/min, stirring turns
Speed is 30~50rad/min.Drilling machine is cut when soil sinks and opens grouting pump, air compressor machine, and cement mortar and compressed air are poured into soil.
After drilling pipe sinks down into design altitude, suitably continue mixing-filling in stake bottom point, then press and be less than 0.8m/min
Speed whitewash and promote drilling pipe, whitewash while stirring, until design height of pile top.It is marked on drilling rod, controls the long mistake of stake
Difference is less than 10cm.The iron ring that a radius is 5cm is welded on pile frame, measurement iron hammer is hung at high 5m, is straightened using theodolite
Drilling rod verticality makes measurement iron hammer just by iron ring center.Drilling rod must be suitably adjusted before construction every time, makes measurement iron hammer position
In in iron ring, i.e., the drilling rod error of perpendicularity is controlled in 0.5%.To prevent mixing pile from broken pile occur, for slurry must continuously into
Row.Stop to starch for some reason in construction, after recovering for slurry, drilling rod should be promoted after the 30s that whitewashes again by stake driver drilling rod sinking 0.5m.Bottom
Whitewashing should exceed stake end 20cm, and the whitewashing time is 30s, makes slurries that an end be fully achieved.
(2) sidewall of basement template is installed, indwelling lower counterbore during sidewall of basement formwork erection, in cutting shoe position pre-buried steel
Sludge out pipe binds sidewall of basement reinforcing bar, then pours sidewall of basement concrete；
(3) extraction mud pipe is put into lower counterbore after sidewall of basement concrete reaches design strength 100%, in extraction mud pipe
The mounting flange between steel sludge out pipe；
(4) lower immersed tube is put into lower counterbore, first examination bath before sinking, examination opens air compressor machine when washing by water, when air compressor machine gas
Pressure opens centrifugal water pump when reaching 0.4MPa；The air compressor machine being connected with qi of chong channel ascending adversely pipe is started during sinking, and starts and washes by water simultaneously
The water pump of pipe rotates synchronously spiral steel disc drill bit and sinks, hydraulic pressure and air pressure are adjusted in time according to soil resistance in sinking watching,
Hydraulic pressure and pressure control are in 0.8~1.2MPa；When the hydraulic pressure of jet water spout is gentle to be pressed in drill bit lower central and go out, the sand of formation
Aqueous mixtures enter extraction mud pipe since high pressure is acted on from steel sludge out pipe, pump dredger are opened when sinking, by the soil in extraction mud pipe
Extraction；Stop bath when sidewall of basement sinks down into 0.5~0.8m of more than designed elevation, rotate spiral steel disc drill bit and sink down into
Designated position；
(5) by after leveling at the top of cement mixing pile, rubber sheet gasket is laid at the top of cement mixing pile；
(6) the brick fetal membrane of basement bottom board is installed, installs the template of basement reversed beam, binds basement bottom board or basement
The reinforcing bar of reversed beam pours basement bottom board or basement reversed beam；
(7) lower counterbore inside sidewall of basement template is closed；Lower counterbore closing is swollen in C30 using C30 expansive concretes
Accelerated cement slurry is first injected before swollen concrete construction, the hole at steel sludge out pipe and cutting shoe position can be blocked after accelerated cement slurry injection
Hole；
(8) one layer concrete floor of construction；
Lower counterbore and a layer concrete floor slab construction inside closing sidewall of basement template can be mixed with basement bottom board
Soil synchronous construction is coagulated to accelerate progress.
Basement bottom board lower part is weak soil soil property, and when foundation soil strength is less than 2MPa, construction procedure is：
(1) construction minor diameter prefabricated pile；
When running into hard interbedded layer, if directly pressing minor diameter prefabricated pile, the destruction of minor diameter precast pile head is likely to result in,
It is pushed in advance using steel pipe, diameter of steel tube is smaller by 1/4~1/3 than minor diameter prefabricated pile diameter, and coarse-pitch thread steel is welded outside steel pipe
Muscle is pushed the coarse thread steel bar that the fixture in minor diameter prefabricated pile equipment is clamped outside steel pipe, then extracts steel pipe, will
The soil cleaning of steel pipe inner product, if hard interbedded layer is very hard, can twitch steel pipe, progressively hard interbedded layer be made to fluff repeatedly, be then pressed into small straight
Footpath prefabricated pile；
(2) sidewall of basement template is installed, indwelling lower counterbore during sidewall of basement formwork erection, in cutting shoe position pre-buried steel
Sludge out pipe binds sidewall of basement reinforcing bar, then pours sidewall of basement concrete；
(3) extraction mud pipe is put into lower counterbore after sidewall of basement concrete reaches design strength 100%, in extraction mud pipe
The mounting flange between steel sludge out pipe；
(4) lower immersed tube is put into lower counterbore, in order to reduce the smooth sinking of frictional force first examination bath before sinking, when examination is washed by water
Air compressor machine is opened, centrifugal water pump is opened when air compressor machine air pressure reaches 0.4MPa；The sky being connected with qi of chong channel ascending adversely pipe is started during sinking
Press, and the water pump with jet water spout is started simultaneously, it rotates synchronously spiral steel disc drill bit and sinks, hindered in sinking watching according to soil
Power adjusts hydraulic pressure and air pressure in time, and hydraulic pressure and pressure control are in 0.8~1.2MPa；It is pressed in when the hydraulic pressure of jet water spout is gentle under drill bit
When portion is gone out at center, the husky aqueous mixtures of formation enter extraction mud pipe since high pressure is acted on from steel sludge out pipe, open and take out when sinking
Mud machine extracts the soil in extraction mud pipe out；Stop bath when sidewall of basement sinks down into 0.5~0.8m of more than designed elevation,
It rotates spiral steel disc drill bit and sinks down into designated position；
(5) the brick fetal membrane of basement bottom board is installed, installs the template of basement reversed beam, binds basement bottom board or basement
The reinforcing bar of reversed beam pours basement bottom board or basement reversed beam；
(6) lower counterbore inside sidewall of basement template is closed；Lower counterbore closing is swollen in C30 using C30 expansive concretes
Accelerated cement slurry is first injected before swollen concrete construction, the hole at steel sludge out pipe and cutting shoe position can be blocked after accelerated cement slurry injection
Hole；
(7) one layer concrete floor of construction；
Lower counterbore and a layer concrete floor slab construction inside closing sidewall of basement template can be mixed with basement bottom board
Soil synchronous construction is coagulated to accelerate progress.
The present invention has a safety feature, low cost, short time limit.
Description of the drawings
Fig. 1 is sunk type basement floor map one, and Fig. 2 is sunk type basement floor map, and Fig. 3 is sunk type
Basement floor map three, Fig. 4 are sunk type basement elevational schematic view one, and Fig. 5 is sunk type basement elevational schematic view
Two, Fig. 6 are sunk type basement elevational schematic view three.
1st, basement reversed beam, 2, sidewall of basement, 3, lower counterbore, 4, minor diameter prefabricated pile, 5, basement bottom board, 6, sink
Pipe, 7, extraction mud pipe, 8, steel sludge out pipe, 9, cutting shoe, 10, one layer concrete floor, 11, rubber sheet gasket, 12, cement mixing pile.
Specific embodiment
The present embodiment is described in detail below in conjunction with attached drawing.
Embodiment one
2 width of sidewall of basement is 420mm in the present embodiment, and 2 bottom of sidewall of basement sets cutting shoe 9, and 9 gradient of cutting shoe is
55 degree, sidewall of basement 2 sets lower counterbore 3, and adjacent lower counterbore 3 is apart from for 1m, 3 a diameter of 140mm of lower counterbore；In lower counterbore 3
Lower immersed tube 6 and extraction mud pipe 7 are set, lower 6 end of immersed tube sets spiral steel disc drill bit, has qi of chong channel ascending adversely pipe and jet water spout in lower immersed tube 6, under
Also set up extraction mud pipe 7 in counterbore 3, pre-buried steel sludge out pipe 8 in cutting shoe 9,8 a diameter of 50mm of steel sludge out pipe, steel sludge out pipe 8 passes through method
Blue disk couples with extraction mud pipe 7, ring flange middle pad rubber gasket, blending bolt locking, it is ensured that connector is tightly water-tight.
5 bottom absolute altitude of basement bottom board is identical with the top mark height of 2 cutting shoe 9 of sidewall of basement.Foundation soil below basement bottom board 5
When intensity is 10MPa, basement bottom board 5 is only set.
Construction procedure is：
(1) 2 template of sidewall of basement is installed, indwelling lower counterbore 3, pre- at 9 position of cutting shoe during 2 formwork erection of sidewall of basement
Steel sludge out pipe 8 is buried, 2 reinforcing bar of sidewall of basement is bound, then pours 2 concrete of sidewall of basement；
(2) extraction mud pipe 7 is put into lower counterbore 3 after 2 concrete of sidewall of basement reaches design strength 100%, taken out
Mounting flange between mud pipe 7 and steel sludge out pipe 8；
(3) lower immersed tube 6 is put into lower counterbore 3, smoothly sinks to first trying bath to reduce frictional force before sinking, examination bath
Shi Kaiqi air compressor machines open centrifugal water pump when air compressor machine air pressure reaches 0.4MPa；Start what is be connected with qi of chong channel ascending adversely pipe during sinking
Air compressor machine, and the water pump with jet water spout is started simultaneously, it rotates synchronously spiral steel disc drill bit and sinks, according to soil in sinking watching
Resistance adjusts hydraulic pressure and air pressure in time, and hydraulic pressure and pressure control are in 0.8~1.2MPa；Drill bit is pressed in when the hydraulic pressure of jet water spout is gentle
When lower central is gone out, the husky aqueous mixtures of formation enter extraction mud pipe 7 since high pressure is acted on from steel sludge out pipe 8, are opened when sinking
Pump dredger is opened, the soil in extraction mud pipe 7 is extracted out；Stop when sidewall of basement 2 sinks down into 0.5~0.8m of more than designed elevation
Bath rotates spiral steel disc drill bit and sinks down into designated position；
(4) the brick fetal membrane of basement bottom board 5 is installed, the reinforcing bar of basement bottom board 5 is bound, pours basement bottom board 5；
(5) lower counterbore 3 inside 2 template of sidewall of basement is closed；The closing of lower counterbore 3 uses C30 expansive concretes,
Accelerated cement slurry is first injected before the construction of C30 expansive concretes, steel sludge out pipe 8 and cutting shoe 9 can be blocked after accelerated cement slurry injection
The hole at position；
(6) one layer concrete floor of construction；
The 3 and one layer concrete floor slab construction of lower counterbore closed inside 2 template of sidewall of basement can be with basement bottom board 5
Concrete synchronous constructs to accelerate progress.
Embodiment two
2 width of sidewall of basement is 420mm in the present embodiment, and 2 bottom of sidewall of basement sets cutting shoe 9, and 9 gradient of cutting shoe is
55 degree, sidewall of basement 2 sets lower counterbore 3, and adjacent lower counterbore 3 is apart from for 1m, 3 a diameter of 140mm of lower counterbore；In lower counterbore 3
Lower immersed tube 6 and extraction mud pipe 7 are set, lower 6 end of immersed tube sets spiral steel disc drill bit, has qi of chong channel ascending adversely pipe and jet water spout in lower immersed tube 6, under
Also set up extraction mud pipe 7 in counterbore 3, pre-buried steel sludge out pipe 8 in cutting shoe 9,8 a diameter of 50mm of steel sludge out pipe, steel sludge out pipe 8 passes through method
Blue disk couples with extraction mud pipe 7, ring flange middle pad rubber gasket, blending bolt locking, it is ensured that connector is tightly water-tight.
5 bottom absolute altitude of basement bottom board is identical with the top mark height of 2 cutting shoe 9 of sidewall of basement.Foundation soil below basement bottom board 5
Intensity is 3MPa, sets basement bottom board 5 and basement reversed beam 1, and adjacent 1 spacing of basement reversed beam is 1.3m, basement reversed beam 1
Width is 300mm, and 1 height of basement reversed beam is 300mm, and longitudinal basement reversed beam 1 and horizontal basement reversed beam 1 form well shape,
Cement mixing pile 12 is disposed below in basement reversed beam 1, and rubber spacer, rubber are set between cement mixing pile 12 and basement reversed beam 1
Rubber cushion layer thickness be 15mm, set rubber spacer the purpose of be to reduce by 12 top rigidity of cement mixing pile, be conducive to cement and stir
Mix stake 12 and the common load of soil；
Construction procedure is：
(1) construction cement mixing pile 12；
Technical parameter is selected as follows：Grouting pressure is less than 1.0MPa, and flow rate of grouting is 130~150L/min, soil cement 28d
Intensity is more than 0.8MPa.12 drilling machine subsidence velocity of cement mixing pile is less than 1.2m/min, promotes speed and is less than 0.8m/min, stirring
Rotating speed is 30~50rad/min.Drilling machine is cut when soil sinks and opens grouting pump, air compressor machine, and cement mortar and compressed air are poured into soil
In.
After drilling pipe sinks down into design altitude, suitably continue mixing-filling in stake bottom point, then press and be less than 0.8m/min
Speed whitewash and promote drilling pipe, whitewash while stirring, until design height of pile top.It is marked on drilling rod, controls the long mistake of stake
Difference is less than 10cm.The iron ring that a radius is 5cm is welded on pile frame, measurement iron hammer is hung at high 5m, is straightened using theodolite
Drilling rod verticality makes measurement iron hammer just by iron ring center.Drilling rod must be suitably adjusted before construction every time, makes measurement iron hammer position
In in iron ring, i.e., the drilling rod error of perpendicularity is controlled in 0.5%.To prevent mixing pile from broken pile occur, for slurry must continuously into
Row.Stop to starch for some reason in construction, after recovering for slurry, drilling rod should be promoted after the 30s that whitewashes again by stake driver drilling rod sinking 0.5m.Bottom
Whitewashing should exceed stake end 20cm, and the whitewashing time is 30s, makes slurries that an end be fully achieved.
(2) 2 template of sidewall of basement is installed, indwelling lower counterbore 3, pre- at 9 position of cutting shoe during 2 formwork erection of sidewall of basement
Steel sludge out pipe 8 is buried, 2 reinforcing bar of sidewall of basement is bound, then pours 2 concrete of sidewall of basement；
(3) extraction mud pipe 7 is put into lower counterbore 3 after 2 concrete of sidewall of basement reaches design strength 100%, taken out
Mounting flange between mud pipe 7 and steel sludge out pipe 8；
(4) lower immersed tube 6 is put into lower counterbore 3, smoothly sinks to first trying bath to reduce frictional force before sinking, examination bath
Shi Kaiqi air compressor machines open centrifugal water pump when air compressor machine air pressure reaches 0.4MPa；Start what is be connected with qi of chong channel ascending adversely pipe during sinking
Air compressor machine, and the water pump with jet water spout is started simultaneously, it rotates synchronously spiral steel disc drill bit and sinks, according to soil in sinking watching
Resistance adjusts hydraulic pressure and air pressure in time, and hydraulic pressure and pressure control are in 0.8~1.2MPa；Drill bit is pressed in when the hydraulic pressure of jet water spout is gentle
When lower central is gone out, the husky aqueous mixtures of formation enter extraction mud pipe 7 since high pressure is acted on from steel sludge out pipe 8, are opened when sinking
Pump dredger is opened, the soil in extraction mud pipe 7 is extracted out；Stop when sidewall of basement 2 sinks down into 0.5~0.8m of more than designed elevation
Bath rotates spiral steel disc drill bit and sinks down into designated position；
(5) by after 12 top leveling of cement mixing pile, rubber sheet gasket 11 is laid at 12 top of cement mixing pile；
(6) the brick fetal membrane of basement bottom board 5 is installed, installs the template of basement reversed beam 1, binds basement bottom board 5 or ground
The reinforcing bar of lower room reversed beam 1 pours basement bottom board 5 or basement reversed beam 1；
(7) lower counterbore 3 inside 2 template of sidewall of basement is closed；The closing of lower counterbore 3 uses C30 expansive concretes,
Accelerated cement slurry is first injected before the construction of C30 expansive concretes, steel sludge out pipe 8 and cutting shoe 9 can be blocked after accelerated cement slurry injection
The hole at position；
(8) one layer concrete floor of construction；
The 3 and one layer concrete floor slab construction of lower counterbore closed inside 2 template of sidewall of basement can be with basement bottom board 5
Concrete synchronous constructs to accelerate progress.
Embodiment three
2 width of sidewall of basement is 420mm in the present embodiment, and 2 bottom of sidewall of basement sets cutting shoe 9, and 9 gradient of cutting shoe is
55 degree, sidewall of basement 2 sets lower counterbore 3, and adjacent lower counterbore 3 is apart from for 1m, 3 a diameter of 140mm of lower counterbore；In lower counterbore 3
Lower immersed tube 6 and extraction mud pipe 7 are set, lower 6 end of immersed tube sets spiral steel disc drill bit, has qi of chong channel ascending adversely pipe and jet water spout in lower immersed tube 6, under
Also set up extraction mud pipe 7 in counterbore 3, pre-buried steel sludge out pipe 8 in cutting shoe 9,8 a diameter of 50mm of steel sludge out pipe, steel sludge out pipe 8 passes through method
Blue disk couples with extraction mud pipe 7, ring flange middle pad rubber gasket, blending bolt locking, it is ensured that connector is tightly water-tight.
5 bottom absolute altitude of basement bottom board is identical with the top mark height of 2 cutting shoe 9 of sidewall of basement.The ground below basement bottom board 5
When native intensity is 1.5MPa, basement bottom board 5 and basement reversed beam 1 be set, adjacent 1 spacing of basement reversed beam is 1.5m, underground
Reversed beam 1 width in room is 300mm, and 1 height of basement reversed beam is 350mm, longitudinal basement reversed beam 1 and horizontal 1 shape of basement reversed beam
Minor diameter prefabricated pile 4 is disposed below in Cheng Jingzhuan, longitudinal basement reversed beam 1 and horizontal 1 crossover location of basement reversed beam, and minor diameter is pre-
4 a diameter of 250mm of stake processed；
Construction procedure is：
(1) construction minor diameter prefabricated pile 4；
When running into hard interbedded layer, if directly pressing minor diameter prefabricated pile 4, it is likely to result in 4 pile crown of minor diameter prefabricated pile and breaks
It is bad, it is pushed in advance using steel pipe, diameter of steel tube is smaller by 1/4~1/3 than 4 diameter of minor diameter prefabricated pile, and thick spiral shell is welded outside steel pipe
Line reinforcing bar is pushed the coarse thread steel bar that the fixture in 4 equipment of minor diameter prefabricated pile is clamped outside steel pipe, then extracts steel
Steel pipe inner product soil is cleared up, if hard interbedded layer is very hard, can twitch steel pipe repeatedly, progressively hard interbedded layer be made to fluff, be then pressed by pipe
Minor diameter prefabricated pile 4；
(2) 2 template of sidewall of basement is installed, indwelling lower counterbore 3, pre- at 9 position of cutting shoe during 2 formwork erection of sidewall of basement
Steel sludge out pipe 8 is buried, 2 reinforcing bar of sidewall of basement is bound, then pours 2 concrete of sidewall of basement；
(3) extraction mud pipe 7 is put into lower counterbore 3 after 2 concrete of sidewall of basement reaches design strength 100%, taken out
Mounting flange between mud pipe 7 and steel sludge out pipe 8；
(4) lower immersed tube 6 is put into lower counterbore 3, smoothly sinks to first trying bath to reduce frictional force before sinking, examination bath
Shi Kaiqi air compressor machines open centrifugal water pump when air compressor machine air pressure reaches 0.4MPa；Start what is be connected with qi of chong channel ascending adversely pipe during sinking
Air compressor machine, and the water pump with jet water spout is started simultaneously, it rotates synchronously spiral steel disc drill bit and sinks, according to soil in sinking watching
Resistance adjusts hydraulic pressure and air pressure in time, and hydraulic pressure and pressure control are in 0.8~1.2MPa；Drill bit is pressed in when the hydraulic pressure of jet water spout is gentle
When lower central is gone out, the husky aqueous mixtures of formation enter extraction mud pipe 7 since high pressure is acted on from steel sludge out pipe 8, are opened when sinking
Pump dredger is opened, the soil in extraction mud pipe 7 is extracted out；Stop when sidewall of basement 2 sinks down into 0.5~0.8m of more than designed elevation
Bath rotates spiral steel disc drill bit and sinks down into designated position；
(5) the brick fetal membrane of basement bottom board 5 is installed, installs the template of basement reversed beam 1, binds basement bottom board 5 or ground
The reinforcing bar of lower room reversed beam 1 pours basement bottom board 5 or basement reversed beam 1；
(6) lower counterbore 3 inside 2 template of sidewall of basement is closed；The closing of lower counterbore 3 uses C30 expansive concretes,
Accelerated cement slurry is first injected before the construction of C30 expansive concretes, steel sludge out pipe 8 and cutting shoe 9 can be blocked after accelerated cement slurry injection
The hole at position；
(7) one layer concrete floor of construction；
The 3 and one layer concrete floor slab construction of lower counterbore closed inside 2 template of sidewall of basement can be with basement bottom board 5
Concrete synchronous constructs to accelerate progress.
Claims (2)
1. a kind of sunk type basement structure, it is characterized in that sidewall of basement width is 400~450mm, sidewall of basement bottom
Cutting shoe is set, cutting shoe gradient is 50~60 degree, and sidewall of basement sets lower counterbore, and adjacent lower counterbore distance is 0.8~1.2m, under
Counter bore hole diameters are 130~160mm；Set lower immersed tube and extraction mud pipe, sinking pipe end that spiral steel disc drill bit is set in lower counterbore, under
There are qi of chong channel ascending adversely pipe and jet water spout in immersed tube, also set up extraction mud pipe in lower counterbore, pre-buried steel sludge out pipe in cutting shoe, steel sludge out pipe is a diameter of
40~60mm, steel sludge out pipe are coupled by ring flange with extraction mud pipe, ring flange middle pad rubber gasket, blending bolt locking,
Ensure that connector is tightly water-tight.
Basement bottom board bottom absolute altitude is identical with the top mark height of sidewall of basement cutting shoe；Foundation soil strength is big below basement bottom board
When equal to 8MPa, basement bottom board is only set；Foundation soil strength is less than 8MPa and is more than or equal to below basement bottom board
During 2MPa, basement bottom board and basement reversed beam are set, adjacent basement reversed beam spacing is 1.2~1.5m, and basement reversed beam is wide
It spends for 300mm, basement reversed beam height is 250~300mm, and longitudinal basement reversed beam and horizontal basement reversed beam form well shape,
Cement mixing pile is disposed below in basement reversed beam, and rubber spacer, rubber spacer are set between cement mixing pile and basement reversed beam
Thickness is 10~15mm；When foundation soil strength is less than 2MPa below basement bottom board, set basement bottom board and basement anti-
Beam, adjacent basement reversed beam spacing are 1.4~1.7m, and basement reversed beam width is 300mm, basement reversed beam height for 300~
400mm, longitudinal basement reversed beam and horizontal basement reversed beam form well shape, and longitudinal basement reversed beam and horizontal basement reversed beam are handed over
Vent, which is put, is disposed below minor diameter prefabricated pile, a diameter of 200~250mm of minor diameter prefabricated pile.
2. sunk type basement structure according to claim 1, it is characterized in that basement bottom board lower part is weak soil soil property, i.e.,
When foundation soil strength is less than 2MPa, construction procedure is：
(1) construction minor diameter prefabricated pile；
(2) sidewall of basement template is installed, indwelling lower counterbore during sidewall of basement formwork erection, in the pre-buried steel mud extraction of cutting shoe position
Pipe binds sidewall of basement reinforcing bar, then pours sidewall of basement concrete；
(3) extraction mud pipe is put into lower counterbore after sidewall of basement concrete reaches design strength 100%, in extraction mud pipe and steel
Mounting flange between sludge out pipe；
(4) lower immersed tube is put into lower counterbore, first examination bath before sinking, examination opens air compressor machine when washing by water, when air compressor machine air pressure reaches
Centrifugal water pump is opened during to 0.4MPa；The air compressor machine being connected with qi of chong channel ascending adversely pipe is started during sinking, and is started simultaneously and jet water spout
Water pump rotates synchronously spiral steel disc drill bit and sinks, hydraulic pressure and air pressure, hydraulic pressure are adjusted in time according to soil resistance in sinking watching
With pressure control in 0.8~1.2MPa；When the hydraulic pressure of jet water spout is gentle to be pressed in drill bit lower central and go out, the husky water of formation mixes
It closes object and enters extraction mud pipe since high pressure is acted on from steel sludge out pipe, open pump dredger when sinking, the soil in extraction mud pipe is extracted out；
Stop bath when sidewall of basement sinks down into 0.5~0.8m of more than designed elevation, rotation spiral steel disc drill bit sinks down into specified
Position；
(5) the brick fetal membrane of basement bottom board is installed, installs the template of basement reversed beam, binds basement bottom board or basement reversed beam
Reinforcing bar, pour basement bottom board or basement reversed beam；
(7) lower counterbore inside sidewall of basement template is closed；Lower counterbore closing is using C30 expansive concretes, in C30 swelled mixtures
Accelerated cement slurry is first injected before solidifying soil construction, steel sludge out pipe and the hole at cutting shoe position can be blocked after accelerated cement slurry injection；
(8) one layer concrete floor of construction；
Lower counterbore and a layer concrete floor slab construction and basement bottom board concrete synchronous inside closing sidewall of basement template
It constructs to accelerate progress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711313226.7A CN108049424A (en) | 2017-12-12 | 2017-12-12 | Sunk type basement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711313226.7A CN108049424A (en) | 2017-12-12 | 2017-12-12 | Sunk type basement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108049424A true CN108049424A (en) | 2018-05-18 |
Family
ID=62124238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711313226.7A Withdrawn CN108049424A (en) | 2017-12-12 | 2017-12-12 | Sunk type basement structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108049424A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109183824A (en) * | 2018-07-30 | 2019-01-11 | 神翼航空器科技（天津）有限公司 | Self-balancing caisson (well) and its technique |
| CN111139869A (en) * | 2020-01-22 | 2020-05-12 | 江苏科技大学 | Excavation type high-waterproof comprehensive pipe gallery structure and construction method thereof |
-
2017
- 2017-12-12 CN CN201711313226.7A patent/CN108049424A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109183824A (en) * | 2018-07-30 | 2019-01-11 | 神翼航空器科技（天津）有限公司 | Self-balancing caisson (well) and its technique |
| CN111139869A (en) * | 2020-01-22 | 2020-05-12 | 江苏科技大学 | Excavation type high-waterproof comprehensive pipe gallery structure and construction method thereof |
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Application publication date: 20180518 |