CN108755692A - Underground structure concrete casting method - Google Patents
Underground structure concrete casting method Download PDFInfo
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- CN108755692A CN108755692A CN201810613041.6A CN201810613041A CN108755692A CN 108755692 A CN108755692 A CN 108755692A CN 201810613041 A CN201810613041 A CN 201810613041A CN 108755692 A CN108755692 A CN 108755692A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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Abstract
The invention belongs to concreting technical fields, more particularly, to underground structure concrete casting method.Its casting method：When carrying out plane pouring, it then follows from as far as it is close, to the ramp structure formula of pushing ahead pour operation from the bottom up；When winter construction is constructed, to control concrete molding temperature will control at 10 DEG C or more, carry out heat and moisture preserving maintenance after pouring in time；Walls concrete answers placement layer by layer, first layer concreting height to control in 300mm or so, pours height every time later and 500mm is not to be exceeded, and pours height and is controlled with the ruler brushed by lift height different colours paint；Layering is finally carried out to vibrate.The technological process and operating method that its stringent control underground cement pours, to ensure the stability of the structure of buried concrete, while specification pours fixed form and the connection method of pipeline, to ensure being perfectly safe for construction.
Description
Technical field
The invention belongs to concreting technical fields, more particularly, to underground structure concrete casting method.
Background technology
Concreting refers to concreting entering mould the process until plasticizing.Buried concrete pours different earth's surfaces
It pours, more problems needed to be considered, and traditional buried concrete casting method is relatively rough, it is impossible to ensure that engineering matter
Amount, needs the later stage to be repaired, cumbersome.
Invention content
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of simple in structure, reasonable design makes
With convenient underground structure concrete casting method, it strictly controls the technological process and operating method that underground cement pours, with
Ensure the stability of the structure of buried concrete, while specification pours fixed form and the connection method of pipeline, to ensure to apply
Work is perfectly safe.
To achieve the above object, the technical solution adopted by the present invention is：Its construction method and flow：
Step 1：Sole plate concreting
When A, using delivery pipe delivering concrete, Ying Youyuan and closely pour, the concrete in the same area, should be by first vertical structure
The sequence of horizontal structure afterwards, stratified continuous pouring；I.e. casting direction takes inclined plane delamination to promote from one end to the other end, once from
Bottom to top casting method pours, and elevator foundation pit and catch pit should be first poured when pouring, after its absolute altitude is consistent with board bottom absolute altitude again
Pour large area；
B, concreting should be carried out continuously, and stringent control is poured from one and pours interval；Such as necessary interval, the intermittent time answers
Shorten as possible, the intermittent time is not more than the presetting period, and should be complete by sublevel concreting before front layer concrete initial set
Finish, and layer concrete 50mm before vibrating spear underthrust；Underplate concrete pours a period of time in advance at elevator, catch pit, but wants
Ensure to pour elevator, crater wall of catchmenting concrete before initial set；
The actual conditions of one gradient of self-assembling formation when C, being poured according to pumping are poured in per pass and are vibrated with front and back arrangement three
Stick, preceding road vibrating spear are arranged at the placing of reinforcement of bottom and at concrete slope foot, and vibrating spear is carried out with concrete surface at 40~45 degree
Vibrate, it is ensured that lower part concrete compaction, rear road vibrating spear are arranged in pouring out concrete point, solve top concrete vibrate with it is close
It is real；
D, sole plate thickness is 700mm, inclined plane delamination should be used to be segmented the method poured, avoid the occurrence of cold seam；It can be by 1：6-
1：10 sloping concreting in lifts；Pouring middle concrete will pave uniformly, collapse consistent, and fully vibrating enables each layer concrete to be formed
One is whole, keeps its contraction distortion consistent；
E, vibrating spear is inserted pull out slowly soon, preferably slightly twitches vibrating spear up and down in process of vibrating, so that up-down vibration is uniform；Vibrating spear moves
Dynamic spacing≤400mm.Every vibrating time 15-30 seconds, vibrate to the bleeding of concrete surface whole, bubble-free, do not sink subject to；
Vibrate last layer when should be inserted into lower layer 50mm to eliminate the seam of two interlayers；
F, base exterior wall leads wall concreting to the middle part of steel plate for sealing water (3mm thickness, 250mm high), pours sequence first to pour
Underplate concrete pours exterior wall and leads wall concrete after pouring 2~3 hours close to exterior wall underplate concrete；
G, during concreting, steel bar stress, positioning bar, the built-in fitting etc. for arranging displacement in time and deforming, and and
When remove concrete surface bleeding；
H, construction is it is noted that prevent surface concrete contraction fissure and thermal cracking, the concrete surface of horizontal structure, in initial set
First 2-3 hours comes into effect and smears pressure, to smooth out rubbing and pressure with wooden float in due course, make real, and arrange reinforcement location；In concrete final set
First 2-3 hours carries out second plastering to its surface again or repeatedly smears pressure processing, and contraction fissure, desciccation crack is made to be closed；
I, when winter construction is constructed, to control concrete molding temperature will control at 10 DEG C or more, be protected in time after pouring
Warm moisture-keeping maintaining, heat preserving method are first to cover layer of plastic film, then cover the double-deck straw screen or mat quilt；The duration of moisture-keeping maintaining is not
It obtains and is less than 14d；
Step 2: wall concrete placings
A, before wall concrete placings, first the cement bonded sand that 50-100mm thickness removes with walls concrete match ratio stone is uniformly poured in bottom
Slurry, is used in combination spade to enter mould, does not apply hopper directly to pour into mould；
B, walls concrete pours blanking point and answers dispersed placement, and wall height directly can descend ash to pour within 3m in wall top, pump line or
Hose should be added at hopper discharge outlets and is goed deep within the walls, and to ensure that concrete freely inclines drop height degree less than 2 meters, wall height is more than 3m
When, string bucket blanking should be used；
C, walls concrete, which pours, to be carried out continuously, and 2h is not to be exceeded in interval time；
D, walls concrete answers placement layer by layer, first layer concreting height to control in 300mm or so, pours height every time later
500mm is not to be exceeded in degree, pours height and is controlled with the ruler brushed by lift height different colours paint；
E, walls concrete is vibrated using poker vibrator layering, and vibrating spear should accomplish " fast insert is pulled out slowly " when vibrating, and be inserted into
Point arrangement is uniform, and the spacing of 30mm or more should be kept with template, and to collide reinforcing bar and built-in fitting when without vibration, vibrating spear moves
Dynamic spacing is 1.25 times of its operating radius (35cm-38.5cm) and is not more than 500mm；To ensure that levels concrete can combine
Integral, when carrying out upper layer concrete vibrating, vibrating spear should be inserted into lower-layer concrete and be not less than 50 mm, and mixed in next layer
Before solidifying soil initial set, upper layer concrete vibrating is finished.Concrete vibration time is no longer significantly sunk with concrete, surface bubble-free
And when flashing mud until；
F, concreting, which is vibrated, finishes, and should be arranged the reinforcing bar suitable for reading thrown away, presses predetermined elevation line with wooden float, will mix
Solidifying soil surface smoothes out；Walls concrete pours height and necessarily is greater than floor lower surface 20mm, in order to wall top concrete laitance
It rejects and the joint part of construction joint reason answers first snap the line to determine the concrete component section ruler at the position when construction joint position is handled
It is very little, then go out to pick chisel range along sectional dimension wire cutting with cutting machine, chisel range inner concrete surface laitance will be picked and loosen stone
Son is rejected, and picks chisel to stone is exposed, and chisel should be picked from wall two towards centre when picking chisel.
G, it before walls concrete pours, is rinsed with clear water and is sufficiently humidified so as to construction seam surface, but must not have product in template
Water.
2, underground structure concrete casting method according to claim 1, it is characterised in that：The cloth of the pump line
It sets：
One, the principle that pump line arrangement follows " route is short, elbow is few, connector is tight " is originally poured, emphasis is to following when pump line is arranged
Problem is controlled：
A, pump line of the present invention selects caliber 125, the abrasion-proof manganese steel seamless steel pipe of wall thickness 3.6mm.
B, at pump machine exit cone, do not allow directly to connect bend pipe, should at least pick out 10 meters or more of straight tube, then connect again
90 ° of elbows turn to vertical transport.When pump line is piped vertically upward, horizontal length of tube should be not less than vertical length of tube four/
One, and it is not less than 15m.When pump line is piped downwards, air bleeding valve should be set in the upper end of inclined tube.When need to do 90 ° of steerings, song should be used
Rate radius is more than 1 meter or more of big elbow.
C, concrete pipeline does not allow to bear any pulling force in concrete delivery service.
D, each piping connection should be secured, stable, and pipe bent position, which adds, to be firmly fixed a little, in case pipeline generation is shaken when pumping
It shakes, loosen.Pump line pipe clamp should not be contacted with ground or supporter, in order to dismount, while should be fastened in place, to ensure that pump line connects
Head is tight, not spillage, gas leakage, and horizontal pipeline, which is laid under pump line, should secure support.
Two, it originally pours pump line to fix, must not be supported directly on reinforcing bar, template, outrigger and built-in fitting, and should meet following
Regulation：
A, horizontal tube：It is fixed with holder, cushion, suspender etc. every 2~3m distances（Per the effective two steel pipe branch of horizontal on ground
Frame is fixed）, in order to exclude plugging, assembly and disassembly and Cleaning pipes；
B, vertical tube：Concrete pump pipe hole is reserved on floor, pump line pierced and fixed with timber wedge from construction.
With the above structure, the present invention has the beneficial effect that：Underground structure concrete casting method of the present invention, it
The technological process and operating method that stringent control underground cement pours, to ensure the stability of the structure of buried concrete, simultaneously
Specification pours fixed form and the connection method of pipeline, to ensure being perfectly safe for construction.The present invention have it is simple in structure, if
The advantages that it is reasonable to set, low manufacture cost.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is that the vibrating spear of the present invention is layered the schematic diagram that vibrates.
Fig. 2 is that the concrete application minor diameter vibrating spear of the present invention vibrates schematic diagram.
Fig. 3 is the floor concrete casting absolute altitude control schematic diagram of the present invention.
Fig. 4 is the erection form schematic diagram of the pump line of the present invention.
Fig. 5 is the concrete pump line through-flooring node diagram of the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings, the present invention is further illustrated.
Present embodiment adopts the following technical scheme that：Step 1：Sole plate concreting
When A, using delivery pipe delivering concrete, Ying Youyuan and closely pour, the concrete in the same area, should be by first vertical structure
The sequence of horizontal structure afterwards, stratified continuous pouring；I.e. casting direction takes inclined plane delamination to promote from one end to the other end, once from
Bottom to top casting method pours, and elevator foundation pit and catch pit should be first poured when pouring, after its absolute altitude is consistent with board bottom absolute altitude again
Pour large area；
B, concreting should be carried out continuously, and stringent control is poured from one and pours interval；Such as necessary interval, the intermittent time answers
Shorten as possible, the intermittent time is not more than the presetting period, and should be complete by sublevel concreting before front layer concrete initial set
Finish, and layer concrete 50mm before vibrating spear underthrust；Underplate concrete pours a period of time in advance at elevator, catch pit, but wants
Ensure to pour elevator, crater wall of catchmenting concrete before initial set；
The actual conditions of one gradient of self-assembling formation when C, being poured according to pumping are poured in per pass and are vibrated with front and back arrangement three
Stick, preceding road vibrating spear are arranged at the placing of reinforcement of bottom and at concrete slope foot, and vibrating spear is carried out with concrete surface at 40~45 degree
Vibrate, it is ensured that lower part concrete compaction, rear road vibrating spear are arranged in pouring out concrete point, solve top concrete vibrate with it is close
It is real；
D, sole plate thickness is 700mm, inclined plane delamination should be used to be segmented the method poured, avoid the occurrence of cold seam；It can be by 1：6-
1：10 sloping concreting in lifts；Pouring middle concrete will pave uniformly, collapse consistent, and fully vibrating enables each layer concrete to be formed
One is whole, keeps its contraction distortion consistent；
E, vibrating spear is inserted pull out slowly soon, preferably slightly twitches vibrating spear up and down in process of vibrating, so that up-down vibration is uniform；Vibrating spear moves
Dynamic spacing≤400mm.Every vibrating time 15-30 seconds, vibrate to the bleeding of concrete surface whole, bubble-free, do not sink subject to；
Vibrate last layer when should be inserted into lower layer 50mm to eliminate the seam of two interlayers；
F, base exterior wall leads wall concreting to the middle part of steel plate for sealing water (3mm thickness, 250mm high), pours sequence first to pour
Underplate concrete pours exterior wall and leads wall concrete after pouring 2~3 hours close to exterior wall underplate concrete；
G, during concreting, steel bar stress, positioning bar, the built-in fitting etc. for arranging displacement in time and deforming, and and
When remove concrete surface bleeding；
H, construction is it is noted that prevent surface concrete contraction fissure and thermal cracking, the concrete surface of horizontal structure, in initial set
First 2-3 hours comes into effect and smears pressure, to smooth out rubbing and pressure with wooden float in due course, make real, and arrange reinforcement location；In concrete final set
First 2-3 hours carries out second plastering to its surface again or repeatedly smears pressure processing, and contraction fissure, desciccation crack is made to be closed；
I, when winter construction is constructed, to control concrete molding temperature will control at 10 DEG C or more, be protected in time after pouring
Warm moisture-keeping maintaining, heat preserving method are first to cover layer of plastic film, then cover the double-deck straw screen or mat quilt；The duration of moisture-keeping maintaining is not
It obtains and is less than 14d；
Step 2: wall concrete placings
A, before wall concrete placings, first the cement bonded sand that 50-100mm thickness removes with walls concrete match ratio stone is uniformly poured in bottom
Slurry, is used in combination spade to enter mould, does not apply hopper directly to pour into mould；
B, walls concrete pours blanking point and answers dispersed placement, and wall height directly can descend ash to pour within 3m in wall top, pump line or
Hose should be added at hopper discharge outlets and is goed deep within the walls, and to ensure that concrete freely inclines drop height degree less than 2 meters, wall height is more than 3m
When, string bucket blanking should be used；
C, walls concrete, which pours, to be carried out continuously, and 2h is not to be exceeded in interval time；
D, walls concrete answers placement layer by layer, first layer concreting height to control in 300mm or so, pours height every time later
500mm is not to be exceeded in degree, pours height and is controlled with the ruler brushed by lift height different colours paint；
E, such as Fig. 1, walls concrete are vibrated using poker vibrator layering, and vibrating spear should accomplish " fast insert is pulled out slowly " when vibrating,
And insertion point arrangement is uniform, and the spacing of 30mm or more should be kept to shake to collide reinforcing bar and built-in fitting when without vibration with template
Tamper moves 1.25 times that spacing is its operating radius (35cm-38.5cm) and is not more than 500mm；To ensure levels concrete
It can combine integral, when carrying out upper layer concrete vibrating, vibrating spear should be inserted into lower-layer concrete not less than 50 mm, and under
Before one layer concrete initial set, upper layer concrete vibrating is finished.Concrete vibration time is no longer significantly sunk with concrete, surface
Until when bubble-free and flashing mud；
F, concreting, which is vibrated, finishes, and should be arranged the reinforcing bar suitable for reading thrown away, presses predetermined elevation line with wooden float, will mix
Solidifying soil surface smoothes out；Walls concrete pours height and necessarily is greater than floor lower surface 20mm, in order to wall top concrete laitance
It rejects and the joint part of construction joint reason answers first snap the line to determine the concrete component section ruler at the position when construction joint position is handled
It is very little, then go out to pick chisel range along sectional dimension wire cutting with cutting machine, chisel range inner concrete surface laitance will be picked and loosen stone
Son is rejected, and picks chisel to stone is exposed, and chisel should be picked from wall two towards centre when picking chisel.
G, it before walls concrete pours, is rinsed with clear water and is sufficiently humidified so as to construction seam surface, but must not have product in template
Water.
In addition, beam, board concrete casting method：
A, beam, board concrete pour simultaneously, and casting method uses " catching up with slurry processes ", i.e., first casting beams concrete, by beam according to deck-molding
Placement layer by layer pours together with board concrete, with rank again at stairstepping when beam concreting height reaches board bottom position
Trapezoidal continuous extension, beam slab concreting are continuously carried forward.
When casting beams board concrete, cloth, cloth must not should be moved horizontally in 2-3 meters of ranges in same place continuous cloth
Material is preferably perpendicular to template, and fabric thickness should be higher 2-3mm than floorslab concrete finished surface.Profit pipe mortar should be discharged into ash-pit,
Forbid to be directly discharged on top plate.
B, beam slab concrete using vibrator as a plug along casting direction it is dilatory vibrate by the way of, must not in process of vibrating
Leakage, to ensure concrete compaction；Do not allow to spread out and put on concrete with vibrating spear when casting beams board concrete, it is necessary to be paved with spade
Concrete；Ruler should be inserted with iron check concrete thickness, and bracing wire control concrete upper surface absolute altitude at any time in work progress.
When bean column node position reinforcing bar is closeer, concrete application minor diameter vibrating spear vibrates, referring to Fig. 2
C, after beam slab concreting to initial set before, first concrete surface should be struck off with long darby, with wooden float first
Secondary compacting after initial set, is compacted for second with wooden float, rubs hair with the hands, before waiting for concrete final set, i.e., when foot steps on slightly footprint, used
Wooden float third time is compacted, and rubs hair with the hands, when third time is compacted rub hair with the hands, it should be noted that the moving law of wooden float makes the line after stranding hair
There is certain regularity on road.
D, it is still necessary to use plasterer's trowel after using 3m darbys, surface to be put down with wooden float stranding when levelling away from wall side 200mm range plate faces
Press polish, plate face flatness tolerance control within 2mm, to reduce the gap under template between mouth and floor, prevent wall
Occurs spillage phenomenon when concreting；Referring to Fig. 3.
E, the compression strength of concrete should can continue casting concrete when not less than 1.2MPa at Beam-Slab Construction seam.
Before continuing casting concrete, concrete surface should reject laitance at construction joint, and dabbing is rinsed with water and fills to after exposing stone
Divide moistening.It should be first cut into cutting machine before dabbing at construction joint and pick the chisel position line, then can pick chisel, pick the same wall of chisel method
Body.
Wherein, the method for arranging of the pump line：
One, the principle that pump line arrangement follows " route is short, elbow is few, connector is tight " is originally poured, emphasis is to following when pump line is arranged
Problem is controlled：
A, pump line of the present invention selects caliber 125mm, the abrasion-proof manganese steel seamless steel pipe of wall thickness 3.6mm.
B, at pump machine exit cone, do not allow directly to connect bend pipe, should at least pick out 10 meters or more of straight tube, then connect again
90 ° of elbows turn to vertical transport.When pump line is piped vertically upward, horizontal length of tube should be not less than vertical length of tube four/
One, and it is not less than 15m.When pump line is piped downwards, air bleeding valve should be set in the upper end of inclined tube.When need to do 90 ° of steerings, song should be used
Rate radius is more than 1 meter or more of big elbow.
C, concrete pipeline does not allow to bear any pulling force in concrete delivery service.
D, each piping connection should be secured, stable, and pipe bent position, which adds, to be firmly fixed a little, in case pipeline generation is shaken when pumping
It shakes, loosen.Pump line pipe clamp should not be contacted with ground or supporter, in order to dismount, while should be fastened in place, to ensure that pump line connects
Head is tight, not spillage, gas leakage, and horizontal pipeline, which is laid under pump line, should secure support.The erection form of pump line refers to lower Fig. 4.
Two, it originally pours pump line to fix, must not be supported directly on reinforcing bar, template, outrigger and built-in fitting, and should meet following
Regulation：
A, horizontal tube：It is fixed with holder, cushion, suspender etc. every 2~3m distances（Per the effective two steel pipe branch of horizontal on ground
Frame is fixed）, in order to exclude plugging, assembly and disassembly and Cleaning pipes；
B, vertical tube：Concrete pump pipe hole is reserved on floor, pump line pierced and fixed with timber wedge from construction.Fixed form is detailed
See Figure 5：
With the above structure, the present invention has the beneficial effect that：Underground structure concrete casting method of the present invention, it is stringent
The technological process and operating method that control underground cement pours, to ensure the stability of the structure of buried concrete, while specification
Fixed form and the connection method for pouring pipeline, to ensure being perfectly safe for construction.
The above is merely illustrative of the technical solution of the present invention and unrestricted, and those of ordinary skill in the art are to this hair
The other modifications or equivalent replacement that bright technical solution is made, as long as it does not depart from the spirit and scope of the technical scheme of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (8)
1. underground structure concrete casting method, it is characterised in that：Its sole plate concreting flow：
When a, using delivery pipe delivering concrete, Ying Youyuan and closely pour, the concrete in the same area, should be by first vertical structure
The sequence of horizontal structure afterwards, stratified continuous pouring；I.e. casting direction takes inclined plane delamination to promote from one end to the other end, once from
Bottom to top casting method pours, and elevator foundation pit and catch pit should be first poured when pouring, after its absolute altitude is consistent with board bottom absolute altitude again
Pour large area；
B, concreting should be carried out continuously, and stringent control is poured from one and pours interval；Such as necessary interval, the intermittent time answers
Shorten as possible, the intermittent time is not more than the presetting period, and should be complete by sublevel concreting before front layer concrete initial set
Finish, and layer concrete 50mm before vibrating spear underthrust；Underplate concrete pours a period of time in advance at elevator, catch pit, but wants
Ensure to pour elevator, crater wall of catchmenting concrete before initial set；
The actual conditions of one gradient of self-assembling formation when c, being poured according to pumping are poured in per pass and are vibrated with front and back arrangement three
Stick, preceding road vibrating spear are arranged at the placing of reinforcement of bottom and at concrete slope foot, it is ensured that lower part concrete compaction, rear road vibrating spear arrangement
In pouring out concrete point, solve top concrete vibrate with it is closely knit；
D, sole plate thickness is 700mm, inclined plane delamination should be used to be segmented the method poured, avoid the occurrence of cold seam；It can be by 1：6-
1：10 sloping concreting in lifts；Pouring middle concrete will pave uniformly, collapse consistent, and fully vibrating enables each layer concrete to be formed
One is whole, keeps its contraction distortion consistent；
E, vibrating spear is inserted pull out slowly soon, preferably slightly twitches vibrating spear up and down in process of vibrating, so that up-down vibration is uniform；Vibrate upper one
Lower layer 50mm should be inserted into eliminate the seam of two interlayers when layer；
F, base exterior wall leads wall concreting to the middle part of steel plate for sealing water (3mm thickness, 250mm high), pours sequence first to pour
Underplate concrete pours exterior wall and leads wall concrete after pouring 2-3 hours close to exterior wall underplate concrete；
G, during concreting, steel bar stress, positioning bar, the built-in fitting etc. for arranging displacement in time and deforming, and and
When remove concrete surface bleeding；
H, construction is it is noted that prevent surface concrete contraction fissure and thermal cracking, the concrete surface of horizontal structure, in initial set
First 2-3 hours comes into effect and smears pressure, to smooth out rubbing and pressure with wooden float in due course, make real, and arrange reinforcement location；In concrete final set
First 2-3 hours carries out second plastering to its surface again or repeatedly smears pressure processing, and contraction fissure, desciccation crack is made to be closed.
2. underground structure concrete casting method, it is characterised in that：Its wall concrete placings flow：
1) before wall concrete placings, first the cement bonded sand that 50-100mm thickness removes with walls concrete match ratio stone is uniformly poured in bottom
Slurry, is used in combination spade to enter mould, does not apply hopper directly to pour into mould；
2) walls concrete pours blanking point and answers dispersed placement, and wall height directly can descend ash to pour within 3m in wall top, pump line or
Hose should be added at hopper discharge outlets and is goed deep within the walls, and to ensure that concrete freely inclines drop height degree less than 2 meters, wall height is more than 3m
When, string bucket blanking should be used；
3) walls concrete, which pours, to be carried out continuously, and 2h is not to be exceeded in interval time；
4) walls concrete answers placement layer by layer, first layer concreting height to control in 300mm or so, pours height every time later
500mm is not to be exceeded in degree, pours height and is controlled with the ruler brushed by lift height different colours paint；
5) walls concrete is vibrated using poker vibrator layering, and vibrating spear should accomplish " fast insert is pulled out slowly " when vibrating, and be inserted into
Point arrangement is uniform, and the spacing of 30mm or more should be kept with template, and to collide reinforcing bar and built-in fitting when without vibration, vibrating spear moves
Dynamic spacing is 1.25 times of its operating radius (35cm-38.5cm) and is not more than 500mm；Concrete vibration time with concrete not
Significantly sink again, when surface bubble-free and flashing mud until；
6) concreting, which is vibrated, finishes, and should be arranged the reinforcing bar suitable for reading thrown away, presses predetermined elevation line with wooden float, will mix
Solidifying soil surface smoothes out；Walls concrete pours height and necessarily is greater than floor lower surface 20mm, in order to wall top concrete laitance
It rejects and the joint part of construction joint reason answers first snap the line to determine the concrete component section ruler at the position when construction joint position is handled
It is very little, then go out to pick chisel range along sectional dimension wire cutting with cutting machine, chisel range inner concrete surface laitance will be picked and loosen stone
Son is rejected, and picks chisel to stone is exposed, and chisel should be picked from wall two towards centre when picking chisel；
7) it before walls concrete pours, is rinsed with clear water and is sufficiently humidified so as to construction seam surface, but must not have ponding in template.
3. underground structure concrete casting method according to claim 1, it is characterised in that：The arrangement side of the pump line
Method：
Originally the principle that pump line arrangement follows " route is short, elbow is few, connector is tight " is poured, emphasis is asked following when pump line is arranged
Topic is controlled：
I, pump line of the present invention selects caliber 125, the abrasion-proof manganese steel seamless steel pipe of wall thickness 3.6mm；
II, at pump machine exit cone, do not allow directly to connect bend pipe, should at least pick out 10 meters or more of straight tube, then connect again 90 ° it is curved
Head turns to vertical transport；When pump line is piped vertically upward, horizontal length of tube should be not less than a quarter of vertical length of tube, and
And it is not less than 15m；When pump line is piped downwards, air bleeding valve should be set in the upper end of inclined tube；When need to do 90 ° of steerings, curvature half should be used
Diameter is more than 1 meter or more of big elbow；
C, concrete pipeline does not allow to bear any pulling force in concrete delivery service；
D, each piping connection is answered secured, stable, and pipe bent position, which adds, to be firmly fixed a little, in case pipeline generation rocks, is loose when pumping
It is de-；Pump line pipe clamp should not be contacted with ground or supporter, in order to dismount, while should be fastened in place, to ensure that pump pipe union is tight
Close, not spillage, gas leakage, horizontal pipeline, which is laid under pump line, should secure support.
4. underground structure concrete casting method according to claim 1, it is characterised in that：The pump line fixation side
Method：
Originally it pours pump line to fix, must not be supported directly on reinforcing bar, template, outrigger and built-in fitting, and should meet the following requirements：
A, horizontal tube：It is fixed with holder, cushion, suspender etc. every 2-3m distances（Per the effective two steel pipe branch of horizontal on ground
Frame is fixed）, in order to exclude plugging, assembly and disassembly and Cleaning pipes；
B, vertical tube：Concrete pump pipe hole is reserved on floor, pump line pierced and fixed with timber wedge from construction.
5. underground structure concrete casting method according to claim 1, it is characterised in that：The roads step c Zhong Qian
Vibrating spear vibrates with concrete surface at 40-45 degree.
6. underground structure concrete casting method according to claim 1, it is characterised in that：It vibrates in the step e
Stick moves spacing≤400mm；Every vibrating time 15-30 seconds, vibrates to the bleeding of concrete surface whole, bubble-free, does not sink
Subject to.
7. underground structure concrete casting method according to claim 1, it is characterised in that：One-piece casting process is in the teletostage
When construction, to control concrete molding temperature will control at 10 DEG C or more, carry out heat and moisture preserving maintenance, heat preservation side after pouring in time
Method is first to cover layer of plastic film, then cover the double-deck straw screen or mat quilt；The duration of moisture-keeping maintaining must not be less than 14d.
8. underground structure concrete casting method according to claim 2, it is characterised in that：In step 5, to ensure to go up,
Lower-layer concrete can be in conjunction with integral, when carrying out upper layer concrete vibrating, and vibrating spear should be inserted into lower-layer concrete not less than 50
Mm, and before next layer concrete initial set, upper layer concrete vibrating is finished.
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| CN113944480A (en) * | 2021-10-14 | 2022-01-18 | 中国水利水电科学研究院 | Temperature control anti-cracking method for door wall of shield working well |
| CN114164932A (en) * | 2021-11-17 | 2022-03-11 | 中建八局西南建设工程有限公司 | Simple concrete pouring thickness control device and method |
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| CN109372264A (en) * | 2018-12-07 | 2019-02-22 | 南京科技职业学院 | Cesspool pool wall casting system and its construction method in a kind of industrial premises room |
| CN109469292A (en) * | 2018-12-24 | 2019-03-15 | 漳州职业技术学院 | A kind of construction method of moulding and double drips |
| CN110485463A (en) * | 2019-08-30 | 2019-11-22 | 中建五局土木工程有限公司 | Vertically to wall pouring construction method and pouring construction device |
| CN110485463B (en) * | 2019-08-30 | 2024-03-26 | 中建五局土木工程有限公司 | Vertical wall pouring construction method and pouring construction device |
| CN112248183A (en) * | 2020-09-16 | 2021-01-22 | 绍兴中亚工贸园有限公司 | Winter casting process for pipe sheet |
| CN113944480A (en) * | 2021-10-14 | 2022-01-18 | 中国水利水电科学研究院 | Temperature control anti-cracking method for door wall of shield working well |
| CN114164932A (en) * | 2021-11-17 | 2022-03-11 | 中建八局西南建设工程有限公司 | Simple concrete pouring thickness control device and method |
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