CN109372036A - Cast-in-place concrete pile pile head elevation control device and its application method - Google Patents
Cast-in-place concrete pile pile head elevation control device and its application method Download PDFInfo
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- CN109372036A CN109372036A CN201811314105.9A CN201811314105A CN109372036A CN 109372036 A CN109372036 A CN 109372036A CN 201811314105 A CN201811314105 A CN 201811314105A CN 109372036 A CN109372036 A CN 109372036A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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Abstract
The present invention provides a kind of cast-in-place concrete pile pile head elevation control device and its application method, belong to the technical field of architectural engineering, which includes bracket, pulling force inductive switch, winder, coiling electric motor, the first fixed pulley, the second fixed pulley, the graduated traction rope of tool, warning device and buoyancy sounding bob；Bracket includes frame body and horizontal cantilever；Pulling force inductive switch is mounted on frame body, and downward, and end is equipped with the first fixed pulley for end；The second fixed sliding end for being mounted on horizontal cantilever and stretching out frame body；Traction rope is wrapped on winder, and is drawn from winder, is connect after sequentially passing through the first fixed pulley and the second fixed pulley with buoyancy sounding bob；Buoyancy sounding bob is hollow type, can add and subtract high-density matter and control quality, realizes the use in different building sites；The device and method can effectively identify the interface of concrete layer and laitance layer, avoid error brought by traditional artificial measurement, improve the control precision of cast-in-place concrete pile.
Description
Technical field
The present invention relates to the technical fields of architectural engineering, fill more particularly to a kind of cast-in-place concrete pile pile head elevation control
It sets and its application method.
Background technique
Bored concrete pile is the directly aperture on designed stake position, and section is circle, and steel reinforcement cage is placed in hole after pore-forming,
Made of concrete perfusion.Since without friction, without squeezing soil when bored concrete pile, which has, constructs, noise is small, it is close in City Building to be suitable for
The advantages that collection area uses, bored concrete pile foundation engineering has obtained widely in the engineerings such as skyscraper, bridge and port and pier
Using, it has also become most important a kind of foundation engineering form in engineering construction.But the pile head elevation control of cast-in-place concrete pile
Always one of the difficult point of cast-in-place concrete pile engineering construction, this is because since additive is mixed in bored concrete pile process
The exceeded equal many reasons of excessively high or water consumption are measured, causes concrete slump excessive or even isolates, laitance occur, laitance is through vibrating
Post-concentration collection forms laitance layer on the top of concrete, and the intensity after laitance layer solidification is unable to reach wanting for bored concrete pile standard
It asks.In order to avoid the influence of laitance layer, in the pile head elevation control to bored concrete pile, often to surpass on the stake top absolute altitude of setting
Specified altitude assignment is filled, it is 500mm or more that general bored concrete pile, which needs hypervelocity, and after the concrete has set cuts laitance part.
Currently, in the control process of superfilled height, it is more difficult to solve the problems, such as be how accurately to identify concrete layer and
The interface of laitance layer, so that it is determined that the actual height of concrete, traditional construction method be manually by lining rope by plummet from
Stake mouth is put into, and is greater than laitance due to containing coarse aggregates, the density such as rubble in concrete, when weight enters concrete from laitance layer
When layer, the pulling force of lining rope can generate variation, thus identify the boundary of concrete and laitance.However this method relies on operation people
Member feel or experience come judge concrete whether to plummet apply buoyancy, to the more demanding of operating personnel, and can not yet
Guarantee that plummet is positioned exactly at the designed elevation position of bored concrete pile, therefore the identification error of interface is larger, simultaneously as building site is existing
Field environment is complicated, these methods are affected by building-site operating environment, so that accuracy of identification further decreases.
Summary of the invention
The purpose of the present invention is to provide a kind of cast-in-place concrete pile pile head elevation control device and its application methods, can
The effectively interface of identification concrete layer and laitance layer, avoids error brought by traditional artificial measurement, improves filling concrete
The control precision of stake.
To achieve the above object, the present invention provides a kind of cast-in-place concrete pile pile head elevation control device, including bracket, drawing
Power inductive switch, the coiling electric motor for driving winder rotation, the first fixed pulley, the second fixed pulley, has graduated lead at winder
Messenger, warning device and buoyancy sounding bob；Bracket include height-adjustable frame body and be arranged on frame body can be lateral
The horizontal cantilever for stretching and fixing；Pulling force inductive switch is used to be closed the circuit where warning device, is mounted on frame body, end
Downward, and end is equipped with the first fixed pulley；Winder and coiling electric motor are installed on frame body；Second fixed cunning is mounted on transverse direction
The end of cantilever stretching frame body；Traction rope is wrapped on the winder, and is drawn from winder, and the first fixed pulley is sequentially passed through
It is connect with after the second fixed pulley with buoyancy sounding bob；
The quality of buoyancy sounding bob is determined by following formula:
mg=F 0 +F 1 +F 2 (1)
F 1 =ρ 1 V 1 g (2)
F 2 =ρ 2 V 2 g (3)
Formula (2) and (3) is brought into formula (1) to obtain,m=F 0 / g +ρ 1 V 1 +ρ 2 V 2
In formula,m-The quality of buoyancy sounding bob；F 0 The triggering pulling force of pulling force inductive switch；F 1 Buoyancy sounding bob is in laitance layer
When with the interface of concrete layer, buoyancy of the laitance layer to the application of buoyancy sounding bob；ρ 1 The density of laitance layer；V 1 Buoyancy is visited
When plummet is in the interface of laitance layer and concrete layer, the volume in laitance layer；F 2 Buoyancy sounding bob is in laitance layer
When with the interface of concrete layer, buoyancy of the concrete layer to the application of buoyancy sounding bob；ρ 2 The density of concrete layer；V 2 It is floating
When power sounding bob is in the interface of laitance layer and concrete layer, the volume in concrete layer；gAcceleration of gravity.
Further, buoyancy sounding bob includes the fixed shell of volume and is arranged in the intracorporal filler of shell；On shell
It is provided with closable opening.
Further, frame body includes top mounting portion, the stabilizer blade being arranged in below the mounting portion of top and connection stabilizer blade
Support rod；Stabilizer blade includes the top outer cylinder connecting with top mounting portion, the inner cylinder that is set in outer cylinder and connection outer cylinder and interior
First bolt of cylinder；Multiple through-holes passed through for the first bolt are provided on the barrel of outer cylinder and inner cylinder；It is arranged on support rod
There is the horizontal cantilever installing pipe passed through for horizontal cantilever；Horizontal cantilever installing pipe is equipped with for being resisted against on horizontal cantilever
Two bolts；The end that second bolt is located at outside horizontal cantilever installing pipe is provided with grip part.
Further, frame body further includes the vertical cantilever being arranged in below the mounting portion of top；Vertical cantilever is located at pulling force sense
Between inductive switch and winder, downward, and end is equipped with third fixed pulley for end；The 4th is provided with outside horizontal cantilever installing pipe
Fixed pulley；Traction rope is drawn from winder, and it is fixed sliding to sequentially pass through third fixed pulley, the first fixed pulley, the 4th fixed pulley and second
It is connect after wheel with buoyancy sounding bob.
Further, above-mentioned cast-in-place concrete pile pile head elevation control device, further include be arranged on the mounting portion of top and
Counterweight far from buoyancy sounding bob；Counterweight includes the water tank for filling water；The top opening of water tank is provided with tank lid, sets on bottom plate
It is equipped with drainage hole；Valve is provided on drainage hole, valve is connected with drainpipe.
Further, winder is measurement tape measure；The tape for measuring tape measure is traction rope.
Further, above-mentioned cast-in-place concrete pile pile head elevation control device further includes control coiling electric motor working condition
Romote controlled receiving system and control romote controlled receiving system remote controler.
The present invention also provides a kind of application methods of cast-in-place concrete pile pile head elevation control device, include the following steps,
Buoyancy sounding bob, is hung on the default elevation location of bored concrete pile to be processed by S1, and pulling force inductive switch detects that buoyancy is visited
Plummet is greater than triggering pulling force to the pulling force of traction rope, and pulling force inductive switch is in the open state, and the circuit where warning device is disconnected
It opens；
S2 carries out filling concrete, until the interface of laitance layer and concrete layer is raised to the height of buoyancy sounding bob, pulling force sense
Inductive switch is closed after reaching triggering pulling force, and the closing of circuit where warning device, warning device sounds an alarm；
S3 stops concrete perfusion.
Further, in above-mentioned steps S2, buoyancy sounding bob is located at volume in laitance layer and in concrete layer
When volume is equal, pulling force inductive switch triggering closure.
The present invention also provides a kind of application methods of cast-in-place concrete pile pile head elevation control device, include the following steps,
Buoyancy sounding bob, is hung on the stake mouth of bored concrete pile to be processed by S1, and pulling force inductive switch detects buoyancy sounding bob to leading
The pulling force of messenger is greater than triggering pulling force, and pulling force inductive switch is in the open state, and the circuit where warning device disconnects；
S2 puts down buoyancy sounding bob along bored concrete pile to be processed, until buoyancy sounding bob touches a bottom, pulling force inductive switch
It is closed after reaching triggering pulling force, the closing of circuit where warning device, warning device sounds an alarm.
The beneficial effects of the present invention are:
Cast-in-place concrete pile pile head elevation control device provided by the invention and its application method, by buoyancy sounding bob hang on to
The default elevation location of bored concrete pile is processed, the pulling force and self gravity balance that traction rope provides at this time, with the perfusion of concrete,
Buoyancy sounding bob is into laitance layer first, and the pulling force and self gravity balance of buoyancy, traction rope offer that laitance provides connect
Enter laitance layer and concrete layer interface, laitance provide buoyancy, concrete provide buoyancy, traction rope provide drawing
Power and self gravity balance, the pulling force that whole process pulling force inductive switch detects are gradually reduced, and are drawn until reaching triggering
It being closed after power, the closing of circuit where warning device, warning device sounds an alarm, and remind staff to stop concrete perfusion,
Not only it ensure that effective influx height of bored concrete pile, but also superfilled amount can be reduced to the greatest extent, and be conducive to reduce pouring material
Waste, reduce it is subsequent cuts difficulty, and entire operation process automation carries out, and is affected by human factors small, ensure that
Control precision and charging efficiency.Having graduated traction rope can intuitively judge buoyancy sounding bob in bored concrete pile to be processed
Depth.Height-adjustable frame body and can the horizontal cantilever of transversal stretching and fixation can be adjusted according to specific condition of construction
Buoyancy sounding bob guarantees that buoyancy sounding bob can be deep into bored concrete pile to be processed, improves flexibility and applicability.The device
Other than it can control stake top absolute altitude, moreover it is possible to detect bored concrete pile depth, function is more diversified, by buoyancy sounding bob along to be processed
Bored concrete pile is put down, until buoyancy sounding bob touches a bottom, stake bottom provides holding power to buoyancy sounding bob, in the process, is drawn
The pulling force that power inductive switch detects can be reduced to triggering value of thrust by buoyancy sounding bob gravity value and be reduced to 0 value, pulling force sense again
Inductive switch closure, the closing of circuit where warning device, warning device sound an alarm, and coiling electric motor stops working, and read traction
Bored concrete pile depth value can be obtained in numerical value on rope.
Detailed description of the invention
Fig. 1 is the main view for the cast-in-place concrete pile pile head elevation control device that the embodiment of the present invention 1 provides；
Fig. 2 is the left view of cast-in-place concrete pile pile head elevation control device shown in Fig. 1；
Fig. 3 is the top view of cast-in-place concrete pile pile head elevation control device shown in Fig. 1；
Fig. 4 is the working principle diagram of cast-in-place concrete pile pile head elevation control device shown in Fig. 1；
Fig. 5 is the circuit diagram of cast-in-place concrete pile pile head elevation control device shown in Fig. 1.
In figure: 1- pulling force inductive switch；2- winder；3- coiling electric motor；The first fixed pulley of 4-；The second fixed pulley of 5-；6-
Traction rope；7- buoyancy sounding bob；8- horizontal cantilever；Mounting portion at the top of 9-；10- stabilizer blade；11- support rod；The installation of 12- horizontal cantilever
Pipe；The second bolt of 13-；The vertical cantilever of 14-；15- third fixed pulley；The 4th fixed pulley of 16-；17- water tank；18- tank lid；19-
Drainpipe；20- coiling electric motor mounting plate；21- romote controlled receiving system；22- speech horn；23- alarm lamp；24- broadcast device；
25- power supply indicator；26- transformer；101- laitance layer；102- concrete layer.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of cast-in-place concrete pile pile head elevation control devices, including bracket, pulling force inductive switch 1, coiling
Device 2, the coiling electric motor 3 for driving winder 2 to rotate, the first fixed pulley 4, the second fixed pulley 5, the graduated traction rope 6 of tool, alarm
Device and buoyancy sounding bob 7；Bracket include height-adjustable frame body and be arranged on frame body can transversal stretching and solid
Fixed horizontal cantilever 8；Pulling force inductive switch 1 is used to be closed circuit where warning device, is mounted on frame body, end downward,
And end is equipped with the first fixed pulley 4；Winder 2 and coiling electric motor 3 are installed on frame body；Second sliding 5 is mounted on transverse direction surely
The end of the stretching frame body of cantilever 8；Traction rope 6 is wrapped on winder 2, and is drawn from winder 2, and the first fixed pulley is sequentially passed through
4 and second connect after fixed pulley 5 with buoyancy sounding bob 7；
The quality of buoyancy sounding bob 7 is determined by following formula:
mg=F 0 +F 1 +F 2 (1)
F 1 =ρ 1 V 1 g (2)
F 2 =ρ 2 V 2 g (3)
Formula (2) and (3) is brought into formula (1) to obtain,m=F 0 / g +ρ 1 V 1 +ρ 2 V 2
In formula,m-The quality of buoyancy sounding bob；F 0 The triggering pulling force of pulling force inductive switch；F 1 Buoyancy sounding bob is in laitance layer
101 and concrete layer 102 interface when, buoyancy of the laitance layer 101 to the application of buoyancy sounding bob；ρ 1 Laitance layer 101 it is close
Degree；V 1 When buoyancy sounding bob is in the interface of laitance layer 101 and concrete layer 102, the volume in laitance layer 101；F 2 -
When buoyancy sounding bob is in the interface of laitance layer 101 and concrete layer 102, application of the concrete layer 102 to buoyancy sounding bob
Buoyancy；ρ 2 The density of concrete layer 102；V 2 When buoyancy sounding bob is in the interface of laitance layer 101 and concrete layer 102,
Volume in concrete layer 102；gAcceleration of gravity.
Due to buoyancy sounding bob 7 will gap location between passage and steel reinforcement cage, the size of buoyancy sounding bob 7
It should be less than the gap between passage and steel reinforcement cage, volume range generally takes 400-600cm3, shape be made convenient for pick and place bottle
Shape or intermediate thick fusiform spinning taper.After the circuit being connected into where warning device, triggering pulling force can lead to pulling force inductive switch 1
The pulling force for gradually increasing or reducing on pulling force inductive switch 1 is crossed to determine.The density of laitance and the density of concrete are at the construction field (site)
It is sampled measurement.The volume and shape, the triggering pulling force of pulling force inductive switch 1, laitance layer 101 of buoyancy sounding bob 7 has been determined
Density and concrete layer 102 density after, determine that buoyancy sounding bob 7 is in the interface of laitance layer 101 and concrete layer 102
When, the quality of buoyancy sounding bob 7 can be calculated in the volume in laitance layer 101 and concrete layer 102.For the ease of meter
It calculates, when pulling force inductive switch 1 triggers, buoyancy sounding bob 7 is in the interface of laitance layer 101 and concrete layer 102, and is located at floating
Volume in pulp layer 101 and concrete layer 102 respectively accounts for the half of 7 volume of buoyancy sounding bob.
Further, buoyancy sounding bob 7 includes the fixed shell of volume and is arranged in the intracorporal filler of shell；On shell
It is provided with closable opening.7 density of buoyancy sounding bob can be carried out according to laitance layer 101 and 102 density difference of concrete layer
For sexually revising, i.e., volume is fixed, and high-density matter is added and subtracted in hollow housing and adjusts 7 mass of buoyancy sounding bob, is applicable to
Different building sites.
Further, frame body includes top mounting portion 9, the stabilizer blade 10 being arranged in below top mounting portion 9 and connection branch
The support rod 11 of foot 10；Top mounting portion 9 can be frame structure or plate structure；Stabilizer blade 10 includes top and top mounting portion
The outer cylinder of connection, the inner cylinder being set in outer cylinder and the first bolt for connecting outer cylinder and inner cylinder；On the barrel of outer cylinder and inner cylinder
Multiple through-holes passed through for the first bolt are provided with, the through-hole that different location is passed through by adjusting the first bolt adjusts frame body
Highly；The horizontal cantilever installing pipe 12 passed through for horizontal cantilever 8 is provided on support rod 11, support rod 11, which has, reinforces stabilizer blade 10
Between bonding strength effect；Horizontal cantilever installing pipe 12 is equipped with the second bolt 13 for being resisted against on horizontal cantilever 8, twists
Loose second bolt 13 adjusts horizontal cantilever 8 to suitable position, tighten the second bolt 13 to horizontal cantilever 8 apply pressure by its
It is fixed.
Further, the bottom end of inner cylinder is provided with gasket made of rubber or plastics, to reduce the abrasion of inner cylinder bottom end.
Further, the end that the second bolt 13 is located at outside horizontal cantilever installing pipe 12 is provided with grip part, the grip part
It can be "-" type or cross etc..
Further, in order to guarantee that buoyancy sounding bob 7 is gone up and down steady, frame body further includes being arranged under top mounting portion 9
The vertical cantilever 14 of side；Vertical cantilever 14 is between pulling force inductive switch 1 and winder 2, and downward, and end is equipped with for end
Third fixed pulley 15；The 4th fixed pulley 16 is provided with outside horizontal cantilever installing pipe 12；Traction rope 6 is drawn from winder 2, is successively worn
It is connect after crossing third fixed pulley 15, the first fixed pulley 4, the 4th fixed pulley 16 and the second fixed pulley 5 with buoyancy sounding bob 7.
Further, above-mentioned cast-in-place concrete pile pile head elevation control device, further include be arranged on top mounting portion 9 and
Counterweight far from buoyancy sounding bob 7 avoids toppling over to guarantee the balance of whole device.
Further, counterweight includes the water tank 17 for filling water；The top opening of water tank 17, which is provided with, prevents pollutant from falling into
Tank lid 18 in water is provided with drainage hole on bottom plate；Valve is provided on drainage hole, valve is connected with drainpipe 19, can root
According to the quality of buoyancy sounding bob 7, the quality of water in regulating tank 17.
Further, winder 2 is measurement tape measure；The tape for measuring tape measure is traction rope 6.
Further, frame body further includes the coiling electric motor mounting plate 20 being arranged between top mounting portion 9 and support rod 11.
In the present embodiment, bracket is integrally made with square steel and steel plate.
Further, above-mentioned cast-in-place concrete pile pile head elevation control device further includes control 3 working condition of coiling electric motor
The romote controlled receiving system 21 of (including rotating forward, reversion and stopping) and the remote controler for controlling romote controlled receiving system 21 are realized long-range
Control the folding and unfolding of buoyancy sounding bob 7.
Further, warning device is combined aural and visual alarm, including speech horn 22 and alarm lamp 23, speech horn 22
With broadcast device 24.
The circuit control process of above-mentioned cast-in-place concrete pile pile head elevation control device is as described below: closure power switch S1
With combined aural and visual alarm switch S3, power supply indicator 25 is bright, and romote controlled receiving system 21 and coiling electric motor 3 are powered, by remote controler to
Romote controlled receiving system 21 issues signal, and control coiling electric motor 3 works, buoyancy sounding bob 7 is placed in bored concrete pile to be processed and is marked in advance
High position carries out filling concrete, until the interface of laitance layer 101 and concrete layer 102 is raised to the height of buoyancy sounding bob 7
Degree, pulling force inductive switch 1(, that is, S2) reach triggering pulling force after be closed, the closing of circuit where combined aural and visual alarm, speech horn 22
Voice prompting is issued, alarm lamp 23 is bright.
Embodiment 2
The present embodiment also provides a kind of application method of cast-in-place concrete pile pile head elevation control device, to mix shown in embodiment 1
Implement based on the elevation control device of solidifying soil grout pile top, include the following steps,
Buoyancy sounding bob 7, is hung on the default elevation location of bored concrete pile to be processed by S1, and pulling force inductive switch 1 detects buoyancy
Sounding bob 7 is greater than triggering pulling force to the pulling force of traction rope 6, and pulling force inductive switch 1 is in the open state, the electricity where warning device
Road disconnects；
S2 carries out filling concrete, until the interface of laitance layer 101 and concrete layer 102 is raised to the height of buoyancy sounding bob 7
Degree, pulling force inductive switch 1 are closed after reaching triggering pulling force, and the closing of circuit where warning device, warning device sounds an alarm；
S3 stops concrete perfusion.
Further, in above-mentioned steps S2, buoyancy sounding bob 7 is located at the volume in laitance layer 101 and is located at concrete layer
When volume in 102 is equal, the triggering closure of pulling force inductive switch 1.Relevant parameter in this way convenient for calculating buoyancy sounding bob 7.
Further, buoyancy sounding bob 7 includes the fixed shell of volume and is arranged in the intracorporal filler of shell；On shell
It is provided with closable opening, 7 density domination standard of buoyancy sounding bob and hollow plus-minus high-density objects realize sounding bob density
Variable method includes the following steps:
By live 101 density of laitance layer and 102 density of concrete layer, formula to calculating buoyancy sounding bob 7 in embodiment 1 is utilized
Quality is changed 7 mass of buoyancy sounding bob by adding and subtracting high-density matter in hollow space, in concrete layer 102
When reaching specified absolute altitude, 7 buoyancy of buoyancy sounding bob increases, and realizes alarm.Embodiment 3
The present embodiment also provides a kind of application method of cast-in-place concrete pile pile head elevation control device, to mix shown in embodiment 1
Implement based on the elevation control device of solidifying soil grout pile top, include the following steps,
Buoyancy sounding bob 7, is hung on the stake mouth of bored concrete pile to be processed by S1, and pulling force inductive switch 1 detects that buoyancy sounding bob 7 is right
The pulling force of traction rope 6 is greater than triggering pulling force, and pulling force inductive switch 1 is in the open state, and the circuit where warning device disconnects；
S2 puts down buoyancy sounding bob 7 along bored concrete pile to be processed, until buoyancy sounding bob 7 touches a bottom, pulling force induction is opened
It is closed after closing 1 arrival triggering pulling force, the closing of circuit where warning device, warning device sounds an alarm.
Buoyancy sounding bob 7 touches a bottom, and stake bottom provides holding power to buoyancy sounding bob 7, in the process, pulling force induction
The pulling force that switch 1 detects can be reduced to triggering value of thrust by buoyancy sounding bob gravity value and be reduced to 0 value (buoyancy sounding bob 7 again
Gravity and the support dynamic balance that is subject to), the length of time that pulling force reduces this process depends on the revolving speed of coiling electric motor 3, draws
The pulling force that power inductive switch 1 detects is closed after reaching triggering pulling force, and the closing of circuit where warning device, warning device issues
Alarm issues signal control coiling electric motor 3 to romote controlled receiving system 21 by remote controler and stops working, reads on traction rope 6
Bored concrete pile depth value can be obtained in numerical value.
Embodiment 4
The volume of buoyancy sounding bob 7VFor 500cm3；The quality of hung weight is when the arrival triggering pulling force of pulling force inductive switch 1
1080g；Buoyancy sounding bob 7 be located at the volume in laitance layer 101 it is equal with the volume in concrete layer 102 when, pulling force sense
The triggering closure of inductive switch 1；The quality m of buoyancy sounding bob 7 are as follows:
m= F 0 / g +1/2ρ 1 V+1/2ρ 2 V=1080+250(ρ 1 +ρ 2 )
The density of laitance layer 101ρ 1 Range is generally 1.1-1.3g/cm3；Concrete density is designed in common engineering in 2.3g/
cm3To 2.5g/cm3Between, the density that other substances make concrete layer 2 can be also mixed into casting processρ 2 Range generally exists
2.0-2.15g/cm3 draws following table:
It can be obtained by above-mentioned calculating and over one hundred test, in the volume of fixed buoyancy sounding bob 7VFor 500cm3In the case of, buoyancy
The density of sounding bob 7 is in 3.71-3.884g/cm3, therefore manufactured buoyancy sounding bob 7 is hollow type, be arranged it is closable be open into
Row plus-minus iron sand, and the amount difference concrete according to used by different building sites for adding and subtracting iron sand calculates gained, while controlling floating
Whether the density of power sounding bob 7 is accurate, is the key that whether forecast concrete reaches specified absolute altitude Con trolling index, and similar to patent
In have ignored this key index, therefore in practical applications do not have directive significance, so not developing Related product in work
Journey is promoted and applied in practice, and product and this patent the research principle of products applied in practice are entirely different.
The rising of concrete layer 102 can be to the impact force of buoyancy sounding bob 7, it is assumed that 20min casting concrete 16m3, drilled pile
Diameter 1.2m, 7 diameter of buoyancy sounding bobA Hammer For 6cm, then FPunching=ρ 2 A Hammer V 2 , made due to can also be mixed into other substances in casting process
The density of concrete layer 102 is less than design concrete density, takes the biggish design concrete of densityρ It is mixed Instead of concrete layer 102
Density, FPunching=ρ It is mixed A Hammer V 2 =2.4×103× 0.06 × (500 × 10-6)2=0.000036N,F 1 =ρ 1 V 1 g=1.1×103×250×
10-6× 9.8=2.695 N, in this FPunchingIt can be ignored.
The above is only the embodiment of the present invention, are not intended to limit the scope of the invention, all to be said using the present invention
Equivalent structure or equivalent flow shift made by bright book content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (10)
1. a kind of cast-in-place concrete pile pile head elevation control device, which is characterized in that including bracket, pulling force inductive switch, coiling
Device, the coiling electric motor for driving winder rotation, the first fixed pulley, the second fixed pulley, the graduated traction rope of tool, warning device with
And buoyancy sounding bob；
The bracket include height-adjustable frame body and be arranged on frame body can transversal stretching and fixation horizontal cantilever；
The pulling force inductive switch is used to be closed circuit where warning device, is mounted on frame body, and downward, and end is pacified for end
Equipped with the first fixed pulley；
The winder and coiling electric motor are installed on frame body；
The described second fixed sliding end for being mounted on horizontal cantilever and stretching out frame body；
The traction rope is wrapped on the winder, and is drawn from winder, is sequentially passed through the first fixed pulley and second and is slided calmly
It is connect after wheel with buoyancy sounding bob；
The quality of the buoyancy sounding bob is determined by following formula:
mg=F 0 +F 1 +F 2 (1)
F 1 =ρ 1 V 1 g (2)
F 2 =ρ 2 V 2 g (3)
Formula (2) and (3) is brought into formula (1) to obtain,m=F 0 / g +ρ 1 V 1 +ρ 2 V 2
In formula,m-The quality of buoyancy sounding bob；F 0 The triggering pulling force of pulling force inductive switch；F 1 Buoyancy sounding bob is in laitance layer
When with the interface of concrete layer, buoyancy of the laitance to the application of buoyancy sounding bob；ρ 1 The density of laitance；V 1 Buoyancy sounding bob
When interface in laitance layer and concrete layer, the volume in laitance layer；F 2 Buoyancy sounding bob is in laitance layer and mixes
When the interface of solidifying soil layer, buoyancy of the concrete to the application of buoyancy sounding bob；ρ 2 The density of concrete；V 2 Buoyancy sounding bob
When interface in laitance layer and concrete layer, the volume in concrete layer；gAcceleration of gravity.
2. cast-in-place concrete pile pile head elevation control device according to claim 1, which is characterized in that the buoyancy detection
Hammer includes the fixed shell of volume and is arranged in the intracorporal filler of the shell；
Closable opening is provided on the shell.
3. cast-in-place concrete pile pile head elevation control device according to claim 1, which is characterized in that the frame body includes
Top mounting portion, the stabilizer blade being arranged in below the mounting portion of top and the support rod for connecting stabilizer blade；
The stabilizer blade includes the top outer cylinder connecting with top mounting portion, the inner cylinder that is set in outer cylinder and connection outer cylinder and interior
First bolt of cylinder；
Multiple through-holes passed through for the first bolt are provided on the barrel of the outer cylinder and inner cylinder；
The horizontal cantilever installing pipe passed through for horizontal cantilever is provided on the support rod；
The horizontal cantilever installing pipe is equipped with the second bolt for being resisted against on horizontal cantilever；
The end that second bolt is located at outside horizontal cantilever installing pipe is provided with grip part.
4. cast-in-place concrete pile pile head elevation control device according to claim 3, which is characterized in that the frame body also wraps
Include the vertical cantilever being arranged in below the mounting portion of top；
The vertical cantilever is between pulling force inductive switch and winder, and downward, and end is equipped with third fixed pulley for end；
The 4th fixed pulley is provided with outside the horizontal cantilever installing pipe；
The traction rope is drawn from winder, and it is fixed sliding to sequentially pass through third fixed pulley, the first fixed pulley, the 4th fixed pulley and second
It is connect after wheel with buoyancy sounding bob.
5. cast-in-place concrete pile pile head elevation control device according to claim 4, which is characterized in that further include that setting exists
On the mounting portion of top and far from buoyancy sounding bob counterweight；
The counterweight includes the water tank for filling water；
The top opening of the water tank is provided with tank lid, is provided with drainage hole on bottom plate；
Valve is provided on the drainage hole, valve is connected with drainpipe.
6. cast-in-place concrete pile pile head elevation control device according to claim 1, which is characterized in that the winder is
Measure tape measure；
The tape of the measurement tape measure is traction rope.
7. cast-in-place concrete pile pile head elevation control device according to claim 1, which is characterized in that further include control around
The romote controlled receiving system of line electric machine operation state and the remote controler for controlling romote controlled receiving system.
8. a kind of application method of cast-in-place concrete pile pile head elevation control device, which is characterized in that include the following steps,
Buoyancy sounding bob, is hung on the default elevation location of bored concrete pile to be processed by S1, and pulling force inductive switch detects that buoyancy is visited
Plummet is greater than triggering pulling force to the pulling force of traction rope, and pulling force inductive switch is in the open state, and the circuit where warning device is disconnected
It opens；
S2 carries out filling concrete, until the interface of laitance layer and concrete layer is raised to the height of buoyancy sounding bob, pulling force sense
Inductive switch is closed after reaching triggering pulling force, and the closing of circuit where warning device, warning device sounds an alarm；
S3 stops concrete perfusion.
9. the application method of cast-in-place concrete pile pile head elevation control device according to claim 8, which is characterized in that on
State in step S2, the buoyancy sounding bob be located at the volume in laitance layer it is equal with the volume in concrete layer when, it is described
Pulling force inductive switch triggering closure.
10. a kind of application method of cast-in-place concrete pile pile head elevation control device, which is characterized in that include the following steps,
Buoyancy sounding bob, is hung on the stake mouth of bored concrete pile to be processed by S1, and pulling force inductive switch detects buoyancy sounding bob to leading
The pulling force of messenger is greater than triggering pulling force, and pulling force inductive switch is in the open state, and the circuit where warning device disconnects；
S2 puts down buoyancy sounding bob along bored concrete pile to be processed, until buoyancy sounding bob touches a bottom, pulling force inductive switch
It is closed after reaching triggering pulling force, the closing of circuit where warning device, warning device sounds an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314105.9A CN109372036A (en) | 2018-11-06 | 2018-11-06 | Cast-in-place concrete pile pile head elevation control device and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314105.9A CN109372036A (en) | 2018-11-06 | 2018-11-06 | Cast-in-place concrete pile pile head elevation control device and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109372036A true CN109372036A (en) | 2019-02-22 |
Family
ID=65397677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811314105.9A Pending CN109372036A (en) | 2018-11-06 | 2018-11-06 | Cast-in-place concrete pile pile head elevation control device and its application method |
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| CN115478538A (en) * | 2022-09-08 | 2022-12-16 | 中电建路桥集团有限公司 | Concrete pouring surface inductor |
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| CN209277214U (en) * | 2018-11-06 | 2019-08-20 | 中铁三局集团有限公司 | Cast-in-place concrete pile pile head elevation control device |
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