CN109141572A - A kind of bored concrete pile perfusion face height determining device and method - Google Patents
A kind of bored concrete pile perfusion face height determining device and method Download PDFInfo
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- CN109141572A CN109141572A CN201810659425.1A CN201810659425A CN109141572A CN 109141572 A CN109141572 A CN 109141572A CN 201810659425 A CN201810659425 A CN 201810659425A CN 109141572 A CN109141572 A CN 109141572A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/0023—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm with a probe suspended by a wire or thread
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Abstract
The present invention provides a kind of bored concrete pile perfusion face height determining device and method, the device include: plummet, lining rope and dynamometer, and the plummet is connected with dynamometer by the lining rope.This method comprises: obtaining the first measured value of dynamometer described in bored concrete pile filling process in real time；If first measured value meets preset condition, it is determined that bored concrete pile perfusion face is perfused to designed elevation.Bored concrete pile perfusion face height determining device and method provided by the invention reduce the influence of human factor on the basis of easy to operate, improve bored concrete pile perfusion face height and determine accuracy by being provided with the combination measurement method of lining rope, plummet and dynamometer.
Description
Technical field
The present invention relates to field of engineering technology, and face height determining device and side is perfused more particularly, to a kind of bored concrete pile
Method.
Background technique
With the rapid development of social economy, cast-in-situ bored pile has become most common pile foundation form in nowadays foundation
One of.Due to the needs of skyscraper, two layers, three layers of basement it is very universal, basis is deeper and deeper, therefore how accurate
Judgement subaqueous concreting whether be right up to designed elevation, becoming influences Construction of Engineering Pile quality, construction period and to apply
An important factor for work cost control.
When cast-in-situ bored pile is used for engineering pile, often there is a certain distance on stake top absolute altitude and natural ground, i.e., have in stake holes
One not the empty of concrete perfusion fill section.With the development of skyscraper, the scale of China's base pit engineering also expands rapidly, foundation pit
Cutting depth is deeper and deeper, and the empty filling section of engineering pile is also deeper and deeper.For using reinforced concrete inner support as supporter
System, the project for the features such as level of ground water is high, drill-pouring Construction of Engineering Pile is usually all since ground.Since the sky of stake holes fills
Section is deeper away from ground, there is the sediment and a large amount of slime water of certain depth above perfusion face, to perfusion face height detection bring compared with
Big difficulty.The detection means of existing bored concrete pile perfusion face height generally uses test method to carry out, i.e., connects plummet with lining rope, will survey
Hammer is put into the concrete-pile poured, and artificial feeling plummet has contactless concrete surface, and then whether to judge perfusion face
Reach designed elevation.
Existing perfusion face height measurement method is although easy to operate, but its precision is poor.Due to main in measurement process
The feel of plummet is pulled to be prejudged with lining rope, this mode only according to feel subjective judgement, there are biggish errors.Except this it
Outside, the sediment above concrete can also have an impact measurement, cause the result inaccuracy of judgement or perfusion excessively high, waste
Concrete or perfusion depth are inadequate, influence pile foundation quality, while influencing the construction in later period duration.Therefore a kind of side is needed now
Method solves the above problems.
Summary of the invention
The present invention is to overcome above-mentioned technological deficiency, provides a kind of bored concrete pile perfusion face method for determining height and device.
In a first aspect, the present invention provides a kind of bored concrete pile perfusion face height determining device, comprising: plummet, lining rope and dynamometry
Meter, the plummet are connected with dynamometer by the lining rope.
Second aspect, the present invention provide a kind of bored concrete pile perfusion face method for determining height, comprising:
The survey measurements of dynamometer described in bored concrete pile filling process is obtained in real time；
If the survey measurements of the dynamometer meets preset condition, it is determined that bored concrete pile perfusion face, which is perfused to design, marks
It is high.
Bored concrete pile perfusion face method for determining height and device provided by the invention, by being provided with lining rope, plummet and dynamometry
The combination measurement method of meter reduces the influence of human factor on the basis of easy to operate, and it is high to improve bored concrete pile perfusion face
It spends and determines accuracy.
Detailed description of the invention
Fig. 1 is that face height determining device structural schematic diagram is perfused in bored concrete pile of the embodiment of the present invention；
Fig. 2 is that face method for determining height flow diagram is perfused in bored concrete pile of the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, is clearly and completely described the technical solution in the present invention, it is clear that described embodiment is one of the invention
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
The detection means of existing bored concrete pile perfusion face height generally uses test method to carry out, i.e., connects plummet with lining rope, will
Plummet is put into the concrete-pile poured, and artificial feeling plummet has a contactless concrete surface, and then to judge that perfusion face is
It is no to reach designed elevation.
This method is although easy to operate, but due to mainly pulling the feel of plummet to carry out in advance with lining rope in measurement process
Sentence, this mode only according to feel subjective judgement, there are biggish errors.In addition to this, the sediment above concrete also can be right
Measurement has an impact, and causes the result inaccuracy of judgement or perfusion excessively high, wastes concrete or perfusion depth is inadequate, shadow
Pile foundation quality is rung, while influencing the construction in later period duration.
Aiming at the problems existing in the prior art, Fig. 1 is that face height determining device knot is perfused in bored concrete pile of the embodiment of the present invention
Structure schematic diagram, as shown in Figure 1, including plummet 11, lining rope 12 and dynamometer 13, plummet 11 and dynamometer 13 are connected by lining rope 12
It connects.
Compared with the device that test method in the prior art uses, the bored concrete pile perfusion face height in the embodiment of the present invention is determined
Device (hereinafter referred to as height determining device) is provided with a dynamometer 13 in a side of lining rope 12, in actual measurement, different
The mode of feel subjective judgement is only leaned in test method, the height determining device in the embodiment of the present invention can observe dynamometry in real time
The reading of meter 13, and changed according to the reading of dynamometer 13 to carry out height and determine, reduce subjective impact.
Specifically, when determining whether bored concrete pile perfusion face height reaches designed elevation using height determining device, first
By the plummet 11 of height determining device by 12 decentralization of side rope to design of pile top absolute altitude, the measurement for reading dynamometer 13 at this time is read
Number.
With the continuous raising in perfusion face, perfusion face can slowly flood plummet 11, in this course, the reading of dynamometer 13
Number can constantly change.The reading for obtaining dynamometer 13 in real time shows to be perfused at this time if the reading of dynamometer 13 meets preset condition
Plummet 11 has been flooded in face, and plummet 11 is placed at design of pile top absolute altitude, so when can determine bored concrete pile perfusion face be perfused
To designed elevation.
Wherein, preset condition can be configured according to actual needs, such as: it is read according to the dynamometer 13 obtained in real time
The difference between initial measurement when being placed in design of pile top absolute altitude with plummet 11 is configured；Or the survey according to dynamometer 13
The change rate of amount reading is configured.
It is understood that when measuring reading to dynamometer 13 be read out according to certain time interval,
So change rate calculation of the survey measurements of dynamometer 13 are as follows: calculate last survey measurements and this measurement first and read
Difference between number, then calculated difference is obtained into dynamometry provided in an embodiment of the present invention divided by last survey measurements
Count the change rate of survey measurements.
Face height determining device is perfused in bored concrete pile provided in an embodiment of the present invention, by being provided with lining rope, plummet and dynamometry
The combination measurement method of meter, and perfusion face height is judged by observation real-time measuring data, subtract on the basis of easy to operate
The influence for having lacked human factor improves bored concrete pile perfusion face height and determines accuracy.
On the basis of the above embodiments, it can refer to shown in Fig. 1, the length of lining rope 12 is equal to ground elevation to design of pile top
The length of absolute altitude.
In embodiments of the present invention, 12 length of lining rope be set as ground elevation to design of pile top absolute altitude length.Due to every
It is secondary when measuring, it requires for plummet 11 to be placed in the position of design of pile top absolute altitude and read.If 12 length of lining rope is rigid
It is equal to ground elevation well to the length of design of pile top absolute altitude, only needs when measurement by the top of lining rope 12 and ground elevation every time
Alignment, plummet 11 is just just at the position of design of pile top absolute altitude, without measuring in advance, saves operating procedure, can
Improve the efficiency of measurement.
On the basis of the above embodiments, refering to what is shown in Fig. 1, plummet 11 is bar dowel.
Bored concrete pile is a kind of pore-forming in place, concrete perfusion or armored concrete and manufactured stake.It is live in practice of construction,
Reinforcing bar is a kind of very common raw material, also facilitates acquisition.In the embodiment of the present invention, plummet 11 is made using bar dowel, side
Just the step of tester gathers materials on the spot, and saves cost of manufacture, also simplifies production.
On the basis of the above embodiments, refering to what is shown in Fig. 1, the shape of plummet 11 includes: cylindrical body, cuboid or pros
Body.Preferably, Fig. 1 is illustrated the embodiment of the present invention by taking cuboid as an example.
In embodiments of the present invention, the shape of plummet 11 is the cube of rule, including but not limited to cylindrical body, cuboid
Or square, since the shape of plummet 11 is regular, so plummet directly can be calculated according to the external dimensions of plummet 11
11 volume, further according to the volume of plummet 11, to assist in the buoyancy variation that plummet 11 is subject in filling process, Jin Ertong
Buoyancy variation is crossed to change in conjunction with the reading of dynamometer 13 to judge whether perfusion face reaches designed elevation.
Such as: if having mud above concrete in filling process, then need the volume according to plummet 11, concrete it is close
The density of degree and mud can just measure the buoyancy variation that plummet 11 is subject in filling process, and specific measurement process is as follows:
The volume V for calculating plummet 11 first, then measures the density p of concreteConcreteWith the density p of mudSlurry.When plummet 11
When being completely disposed in mud, from stress balance:
G=F1+FFloating 1,
Wherein G is the gravity of plummet 11, F1The reading of dynamometer 13, F when being completely disposed in mud for plummet 11Floating 1For at this time
The buoyancy that plummet 11 is subject to, and FFloating 1=ρSlurryGV, wherein g is acceleration of gravity, and V is plummet 11 volume, so when dynamometer 13
Read F1=G-FFloating 1。
Correspondingly, when plummet 11 is completely disposed in concrete, from stress balance:
G=F2+FFloating 2,
Wherein, F2The reading of dynamometer 13, F when being completely disposed in concrete for plummet 11Floating 2Plummet 11 is subject at this time
Buoyancy, and FFloating 2=ρConcreteGV, so when dynamometer 13 reading F2=G-FFloating 2。
The reading of dynamometer 13 changes amplitude at this time are as follows:
Δ F=F1-F2=FFloating 2-FFloating 1=ρConcretegV-ρSlurrygV。
The density of the volume and concrete according to plummet 11 is needed if the top of concrete in filling process does not have mud
The buoyancy variation that plummet 11 is subject in filling process is measured, specific measurement process is as follows:
When plummet is placed in design of pile top absolute altitude, by stress balance it is found that
G=F1,
Wherein G is the gravity of plummet 11, F1The reading of dynamometer 13 when being placed in design of pile top absolute altitude for plummet 11.
Correspondingly, when plummet 11 is completely disposed in concrete, from stress balance:
G=F2+FFloating 2,
Wherein, F2The reading of dynamometer 13, F when being completely disposed in concrete for plummet 11Floating 2Plummet 11 is subject at this time
Buoyancy, and FFloating 2=ρConcreteGV, so when dynamometer 13 reading F2=G-FFloating 2。
The reading of dynamometer 13 changes amplitude at this time are as follows:
Δ F=F1-F2=ρConcretegV。
Wherein, Δ F is reading variation amplitude, ρConcreteFor concrete density, g is acceleration of gravity, and V is 11 volume of plummet.
When the face height of being irrigated determines, plummet 11 is first passed through into 12 decentralization of side rope to design of pile top absolute altitude, acquisition dynamometry
The reading of meter 13 obtains the measured value of dynamometer 13 with the rising in perfusion face in real time, when the difference of measured value and reading before
When value is more than or equal to Δ F, show that bored concrete pile perfusion face has reached designed elevation at this time.
In the embodiment of the present invention, stood by the rule that plummet 11 is shaped to cylindrical body, cuboid or square
Cube allows us to the size by measuring plummet 11 the volume of plummet 11 is calculated, then in conjunction with concrete dense
It spends with mud density and the value of Δ F is calculated, it is easy to operate.
Fig. 2 is the flow diagram that face method for determining height is perfused in bored concrete pile of the embodiment of the present invention, as shown in Figure 2, comprising:
Step 21, the first measured value of dynamometer described in bored concrete pile filling process is obtained in real time；
Step 22, if first measured value meets preset condition, it is determined that bored concrete pile perfusion face is perfused to design
Absolute altitude.
It is determined it is understood that method provided in an embodiment of the present invention bored concrete pile can be perfused face height, from
And judge whether bored concrete pile perfusion face height reaches designed elevation.
Specifically, the embodiment of the present invention needs first that height is true before being irrigated face height and determining in step 21
The plummet for determining device is transferred by side rope to design of pile top absolute altitude, is then irrigated to bored concrete pile, and read in filling process
Real time readouts measured by dynamometer, i.e., the first measured value provided in an embodiment of the present invention.Preferably, the embodiment of the present invention provides
Bored concrete pile filling process be uniformly be perfused according to certain rate of flooding, while dynamometer also according to certain measurement frequency into
Row measurement, to obtain the change rate of the first measured value and the first measured value that dynamometer measures in real time.
In step 22, for the embodiment of the present invention when judging whether perfusion face height reaches designed elevation, foundation is first
Whether measured value meets preset condition.It is one dynamic with perfusion face Level Change since the first measured value obtains in real time
The value of state variation, so requiring to judge whether it meets preset condition after obtaining the first measured value of dynamometer each time.In advance
If condition can be configured according to the actual situation, it is preferred that preset condition in the embodiment of the present invention can be according to obtaining in real time
The difference between initial measurement when the dynamometer reading taken and plummet are placed in design of pile top absolute altitude is configured, can also root
It is configured according to the change rate of the survey measurements of dynamometer.If the first measured value meets preset condition, face is shown to be perfused at this time
Flood plummet, and plummet is placed at design of pile top absolute altitude, so when can determine that bored concrete pile perfusion face has reached design mark
It is high.
Face method for determining height is perfused in bored concrete pile provided in an embodiment of the present invention, by being provided with lining rope, plummet and dynamometry
The combination measurement method of meter reduces the influence of human factor on the basis of easy to operate, and it is high to improve bored concrete pile perfusion face
It spends and determines accuracy.
On the basis of the above embodiments, further, the preset condition be the dynamometer the first measured value with
The difference of second measured value is more than or equal to the first preset threshold, wherein second measured value is transferred to stake top for the plummet and set
The dynamometer measures when counting absolute altitude.
It, can be by plummet by the content of above-described embodiment it is found that the embodiment of the present invention is before the face height of being irrigated determines
Decentralization reads the reading of dynamometer, i.e., the second measured value provided in an embodiment of the present invention to design of pile top absolute altitude at this time.
Further, the embodiment of the present invention provides a kind of determines that bored concrete pile perfusion face is in the way of variation amplitude
It is no to be perfused to designed elevation.Specifically, when the face height of being irrigated determines, plummet is transferred to design of pile top absolute altitude first,
As perfusion face constantly rises, the reading of dynamometer can constantly change, and obtain the first measured value of dynamometer in real time at this time, and sentence
Whether the difference of disconnected first measured value and the second measured value is more than or equal to the first preset threshold, surveys if meeting the first measured value and second
The difference of magnitude is more than or equal to the first preset threshold, shows that face is perfused at this time floods plummet completely, and plummet is placed in stake top
At designed elevation, therefore it can judge that bored concrete pile perfusion face height has reached designed elevation according to this.If the first measured value of dynamometer with
The difference of second measured value is less than the first preset threshold, it is determined that bored concrete pile perfusion face is not perfused to designed elevation.
For example, the second measured value that plummet transfers dynamometer when to design of pile top absolute altitude is 10N, it is submerged completely mixed
When in solidifying soil, the reading of dynamometer is 4N, and available first preset threshold is 6N.At this point, transferring plummet to design of pile top
Absolute altitude, after perfusion face reaches the bottom end of plummet, with the rising in perfusion face, the reading of dynamometer can constantly reduce, from 10N to
The difference of 9N, 8N, 7N, 6N, 5N, 4N, 3.9N, the first measured value and the second measured value is also from 0N to 1N, 2N, 3N, 4N, 5N, 6N,
6.1N shows that bored concrete pile perfusion face is not up to when the difference of the first measured value and the second measured value is less than the first preset threshold 6N
Designed elevation.When the difference of the first measured value and the second measured value soon reaches first preset threshold, perfusion can be slowed down
Speed, convenient to obtain data in real time, when the first measured value reaches 4N, the difference of the first measured value and the second measured value is 6N,
Just it is equal to the first preset threshold, meets preset condition at this time, can determines that bored concrete pile perfusion face has reached designed elevation.
Face method for determining height is perfused in bored concrete pile provided in an embodiment of the present invention, by being provided with lining rope, plummet and dynamometry
The combination measurement method of meter, and set by observation real-time measuring data combination preset threshold to judge whether perfusion face height reaches
Absolute altitude is counted, easy to operate, accuracy is high.
On the basis of the above embodiments, if having mud above the concrete, the method also includes:
According to the volume of the plummet, concrete density and mud density, the first preset threshold size is determined.
In practice of construction, different construction environments can be faced.In some underwater cast-in-place piles, mud is had above perfusion face
Slurry.The process of perfusion is the conduit by concrete by erectting, by the method that the self weight of concrete is irrigated, with coagulation
The continuous perfusion of soil, the mud above concrete also constantly increase.Since the density of mud is generally significantly less than concrete
Density, so the phenomenon that mud and concrete are hardly mixed.The first preset threshold is calculated at this time to need to consider mud
Factor.
The volume V for calculating plummet first, then measures the density p of concreteConcreteWith the density p of mudPaddle.When plummet is complete
When being placed in mud, from stress balance:
G=F1+FFloating 1,
Wherein G is the gravity of plummet, F1The reading of dynamometer, F when being completely disposed in mud for plummetFloating 1For plummet at this time by
The buoyancy arrived, and
FFloating 1=ρSlurryGV,
Wherein g be acceleration of gravity, V be plummet volume, so when dynamometer reading are as follows:
F1=G-FFloating 1。
Correspondingly, when plummet is completely disposed in concrete, from stress balance:
G=F2+FFloating 2,
Wherein, F2The reading of dynamometer, F when being completely disposed in concrete for plummetFloating 2For the buoyancy that plummet at this time is subject to, and
FFloating 2=ρConcreteGV,
So when dynamometer reading F2=G-FFloating 2。
First preset threshold at this time are as follows:
Δ F=F1-F2=FFloating 2-FFloating 1=ρConcretegV-ρSlurrygV。
When the face height of being irrigated determines, first plummet is transferred by side rope to design of pile top absolute altitude, plummet submerges at this time
In mud, the reading of dynamometer is the second measured value.With the rising in perfusion face, i.e. the first measured value can not for the registration of dynamometer
It is disconnected to reduce.When the difference for being decreased to the first measured value and the second measured value is more than or equal to the first preset threshold, show that plummet is complete
It submerges in concrete entirely, then may determine that bored concrete pile perfusion face has reached designed elevation at this time.
For example, the volume of the plummet is 10-3m3, the density of the concrete is 2500kg/m3, the density of the mud
For 1500kg/m3, then the buoyancy being subject to when plummet is completely disposed in mud is
FFloating 1=ρSlurryGV=1500kg/m3*10N/kg*10-3m3=15N,
The buoyancy being subject to when plummet is completely disposed in concrete is
FFloating 2=ρConcreteGV=2500kg/m3*10N/kg*10-3m3=25N,
So when the first preset threshold be
Δ F=F1-F2=FFloating 2-FFloating 1=25N-15N=10N.
When the difference of the first measured value and the second measured value is more than or equal to 10N, show that plummet submerges in concrete completely,
It then may determine that the face of bored concrete pile perfusion at this time has reached designed elevation
On the basis of the above embodiments, if without mud above the concrete, the method also includes:
According to the volume of the plummet, concrete density, the first preset threshold size is determined.
If the top of concrete does not have mud, it is pre- to need to calculate first according to the volume of plummet and the density of concrete
If threshold value, detailed process is as follows:
When plummet is placed in design of pile top absolute altitude, by stress balance it is found that
G=F1,
Wherein G is the gravity of plummet, F1The reading of dynamometer when being placed in design of pile top absolute altitude for plummet.
Correspondingly, when plummet is completely disposed in concrete, from stress balance:
G=F2+FFloating 2,
Wherein, F2The reading of dynamometer, F when being completely disposed in concrete for plummetFloating 2For the buoyancy that plummet at this time is subject to, and
FFloating 2=ρConcreteGV, so when dynamometer reading F2=G-FFloating 2。
First preset threshold at this time are as follows:
Δ F=F1-F2=ρConcretegV。
Wherein, Δ F is the first preset threshold, ρConcreteFor concrete density, g is acceleration of gravity, and V is plummet volume.
When the face height of being irrigated determines, first by plummet by side rope decentralization to design of pile top absolute altitude, plummet is not also at this time
The perfusion face of touching, the reading of dynamometer are the second measured value.With the rising in perfusion face, the registration of dynamometer i.e. first is measured
Value can constantly reduce.When the difference for being decreased to the first measured value and the second measured value is more than or equal to the first preset threshold, show to survey
Hammer submerges in concrete completely, then may determine that bored concrete pile perfusion face has reached designed elevation at this time.
For example, the volume of plummet is 10-3m3, the density of concrete is 2500kg/m3, then plummet is completely disposed in concrete
When the buoyancy that is subject to are as follows:
FFloating 2=ρConcreteGV=2500kg/m3*10N/kg*10-3m3=25N,
So when the first preset threshold are as follows:
Δ F=ρConcreteGV=25N,
When the difference of the first measured value and the second measured value is more than or equal to 25N, show that plummet submerges in concrete completely,
It then may determine that the face of bored concrete pile perfusion at this time has reached designed elevation
Face method for determining height is perfused in bored concrete pile provided in an embodiment of the present invention, by being provided with lining rope, plummet and dynamometry
The combination measurement method of meter, while the processing method of mud and two kinds of situations without mud is given, facilitate construction personnel's root
According to the processing that actual conditions are suitable for because of ground, it also can be improved bored concrete pile perfusion face height and determine accuracy.
On the basis of the above embodiments, the preset condition are as follows:
After first measured value starts change, the change rate of first measured value is less than the second preset threshold.
By the content of above-described embodiment it is found that the embodiment of the present invention is when the face height of being irrigated determines, can will survey first
Hammer passes through side rope decentralization to design of pile top absolute altitude.Preferably, filling process is uniformly perfused with certain speed.Just start to be perfused
When, with a certain distance from perfusion face has from plummet.If design of pile top height and position has mud at this time, from starting perfusion, to perfusion
Face will touch plummet during this, and plummet is greater than the pulling force of dynamometer by gravity, and the of the dynamometer obtained in real time
One measured value provides the difference of buoyancy, after coming into contact with plummet from perfusion face, dynamometer for plummet self gravity and mud
Change takes place in registration；If design of pile top height and position is kept without mud, plummet by the pulling force of gravity and dynamometer at this time
The pulling force of balance, dynamometer is equal to plummet self gravity.From starting perfusion, this section of mistake of plummet will be touched to perfusion face
Cheng Zhong, the first measured value of the dynamometer obtained in real time are to maintain constant, are constantly equal to plummet self gravity.When perfusion face starts
After touching plummet, since plummet will receive concrete to the buoyancy of plummet, according to the reading of stress balance dynamometer at this time
Number is equal to plummet gravity and subtracts concrete to the buoyancy of plummet.
Due to the position of plummet be it is constant, with perfusion face rising, plummet arrange concrete volume increase, plummet
The buoyancy being subject to also increases, correspondingly, the reading of dynamometer slowly reduces.After perfusion face, which rises to, floods plummet, survey
The volume that hammer arranges concrete no longer changes, and the buoyancy being subject at this time is also almost unchanged.
In embodiments of the present invention, be arranged the second preset threshold, for the first measured value with dynamometer change rate into
Row compares, and the first measured value is also obtained with regular hour frequency.With the rising in perfusion face, dynamometer is obtained in real time
The first measured value, and compared with coming with the reading of last dynamometer, be calculated the change rate, and by the change rate with
Second preset threshold compares.Wherein, the calculation of change rate are as follows:
Wherein FaFor the first measured value that last dynamometer obtains in real time, FbIt is obtained in real time for this dynamometer
First measured value, Δ t are the interval time measured every time.The second preset threshold in the embodiment of the present invention can be according to practical feelings
Condition is set, and is not specifically limited in embodiments of the present invention.
After the first measured value starts change, show that perfusion face has begun and touch plummet, calculates the first measurement at this time
The change rate of value, and by the change rate compared with the second preset threshold.If change rate shows dynamometry less than the second preset threshold
The reading of meter tends towards stability as the rising in perfusion face is progressively smaller until, at this time it is known that bored concrete pile perfusion face arrived
Designed elevation.
For example, the reading of dynamometer is 10N, and the second preset threshold is set as when plummet is placed in design of pile top absolute altitude
0.05, dynamometer reading is recorded every 5 seconds, after the first measured value starts change, calculates corresponding change rate.
The reading of dynamometer is 10N at first 5 seconds, and reading is equal with last measured value, shows perfusion face also not
Touch plummet；
The reading of dynamometer is 7.1N at second 5 seconds, and the first measured value has occurred and that variation, reduces 2.9N, shows
Perfusion face is contacted with plummet at this time, at this point, change rate are as follows:
0.58 is greater than the second preset threshold 0.05, shows that bored concrete pile perfusion face is not up to designed elevation；
The reading of dynamometer is 4N, change rate at third 5 seconds are as follows:
0.62 is greater than the second preset threshold 0.05, shows that bored concrete pile perfusion face is not up to designed elevation；
The reading of dynamometer is 3.8N, change rate at the 4th 5 seconds are as follows:
0.04 less than the second preset threshold 0.05；
At this point, suitably increasing monitoring frequency, time interval can be reduced to the number of reading in 1 second, and it is equal that the continuous several seconds calculates change rate
It is less than and stablizes at the second 0.05 or less preset threshold, it may be determined that bored concrete pile perfusion face has reached designed elevation, and it is mixed to stop perfusion
Solidifying soil.
Face method for determining height is perfused in bored concrete pile provided in an embodiment of the present invention, by the second preset threshold of setting as pre-
If condition, it can be operated according only to the first measured value of the dynamometer obtained in real time every time, when the first measured value starts to change
Afterwards, determine that perfusion face reaches designed elevation less than the second preset threshold according to the change rate of first measured value, it is convenient fast
It is prompt.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention.The technical field of the invention
Technical staff can make various modifications or additions to the described embodiments, but without departing from of the invention
Spirit surmounts the range that the appended claims define.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, and those skilled in the art is it is understood that it still can be right
Technical solution documented by foregoing embodiments is modified or equivalent replacement of some of the technical features；And this
It modifies or replaces, the spirit and model of technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (10)
1. face height determining device is perfused in a kind of bored concrete pile characterized by comprising plummet, lining rope and dynamometer, the plummet
It is connected with dynamometer by the lining rope.
2. the apparatus according to claim 1, which is characterized in that the lining rope length is equal to ground elevation to design of pile top mark
High length.
3. the apparatus according to claim 1, which is characterized in that the plummet is bar dowel.
4. the apparatus according to claim 1, which is characterized in that the shape of the plummet includes: cylindrical body, cuboid or just
Cube.
5. face method for determining height is perfused in a kind of bored concrete pile executed using any described device of claim 1-2, feature exists
In, comprising:
The first measured value of dynamometer described in bored concrete pile filling process is obtained in real time；
If first measured value meets preset condition, it is determined that bored concrete pile perfusion face is perfused to designed elevation.
6. according to the method described in claim 5, it is characterized in that, the preset condition is the first measured value of the dynamometer
It is more than or equal to the first preset threshold with the difference of the second measured value, wherein the second measured value is that the plummet is transferred to design of pile top
The dynamometer measures when absolute altitude.
7. according to the method described in claim 5, it is characterized in that, if the first measured value and the second measured value of the dynamometer
Difference less than the first preset threshold, it is determined that bored concrete pile perfusion face is not perfused to designed elevation.
8. method according to claim 6 or 7, which is characterized in that if having mud above the concrete, the method is also
Include:
According to the volume of the plummet, concrete density and mud density, the first preset threshold size is determined.
9. method according to claim 6 or 7, which is characterized in that if the method is also without mud above the concrete
Include:
According to the volume of the plummet, concrete density, the first preset threshold size is determined.
10. according to the method described in claim 5, it is characterized in that, the preset condition are as follows:
After first measured value starts change, the change rate of first measured value is less than the second preset threshold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810659425.1A CN109141572A (en) | 2018-06-25 | 2018-06-25 | A kind of bored concrete pile perfusion face height determining device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810659425.1A CN109141572A (en) | 2018-06-25 | 2018-06-25 | A kind of bored concrete pile perfusion face height determining device and method |
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| CN109141572A true CN109141572A (en) | 2019-01-04 |
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| CN201810659425.1A Pending CN109141572A (en) | 2018-06-25 | 2018-06-25 | A kind of bored concrete pile perfusion face height determining device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110185071A (en) * | 2019-05-17 | 2019-08-30 | 中交天津港湾工程研究院有限公司 | Cast-in-situ bored pile height detecting device and its detection method |
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