CN106320395A - Low-strain double-speed signal averaging detection method for building hollow pile - Google Patents
Low-strain double-speed signal averaging detection method for building hollow pile Download PDFInfo
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- CN106320395A CN106320395A CN201610717690.1A CN201610717690A CN106320395A CN 106320395 A CN106320395 A CN 106320395A CN 201610717690 A CN201610717690 A CN 201610717690A CN 106320395 A CN106320395 A CN 106320395A
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- hollow pile
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- building
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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
Abstract
The invention provides a low-strain double-speed signal averaging detection method for a building hollow pile. The low-strain double-speed signal averaging detection method for the building hollow pile is applied to a pile body of the building hollow pile. The method comprises the steps of determining a knocking point on the surface of the pile top of the building hollow pile; arranging two or more signal acquisition devices on the surface of the pile top of the building hollow pile as measurement points for the pile body of the hollow pile, wherein an included angle of 45 degrees is formed between the position where one of the signal acquisition devices is arranged and the knocking point, and an included angle of 135 degrees is formed between the position where the other signal acquisition device is arranged and the knocking point; when knocking action at the knocking point is received, obtaining a measurement point signal from each signal acquisition device, and obtaining a double-speed test curve containing all the measurement point signals; and conducting averaging processing on the double-speed curve, so that a detection result of the pile body of the building solid pile is obtained. By means of the detection result obtained through the detection method, compared with an existing sampling method, pile body integrity of the pile body of the building hollow pile can be judged more accurately.
Description
Technical field
The present invention relates to building detection field, in particular to the low strain dynamic two-speed of a kind of building hollow pile
Signal averaging detection method.
Background technology
The low change method that should detect of existing common hollow pile applies low-energy transient batting at stake top surface, taps and produces
Shock wave along pile body travel downward, echo will be produced, according to echo when running at the bottom of the medium side of natural impedance change or stake
Characteristics of signals judge pile quality.
At present, existing hollow pile low strain integrity testing detection scheme exists some problems:
Hollow pile due in the middle part of stake hollow without concrete, it is impossible in the middle part of stake tap, load and foundation pile constitute bias and strike
Hit system.Hollow pile pile body, under transient batting load action, not only creates the compressional wave propagated along pile body, also creates bias
Acting shear ripple and three-dimensional interference signal.Current research and the method for sampling do not deeply consider how to eliminate and result from foundation pile
The three-dimensional interference signal at stake top and the eccentric moment shearing wave along pile body propagation.
2, for square and polygon hollow stake, the clearest and the most definite low-strain measurement scheme.
3, along with increase or the reduction of load pulsewidth in stake footpath, three-dimensional interference letter between hollow pile stake end face different measuring points
Number strong and weak regularity of distribution changes, and as when stake footpath is less, the three-dimensional interference signal at place in 90 ° with beating point is relatively shorter than
The measuring point of other position, but it is as the increase in a footpath, the three-dimensional interference signal at place in 90 ° with beating point is noticeably greater than other position
The measuring point put, so, the scheme that prior art is sampled at place in 90 ° with beating point, it is not particularly suited for that a footpath is relatively big or load arteries and veins
Wide less situation, the most existing method is not generally applicable to the hollow pile under different parameters.
So, it would be desirable to one goes for different parameters, and can eliminate three-dimensional interference signal with inclined simultaneously
Heart acting shear ripple, for the low strain dynamic two-speed signal averaging detection method of building hollow pile.
Summary of the invention
The purpose of the embodiment of the present invention is that the low strain dynamic two-speed signal averaging providing a kind of building hollow pile detects
Method, to be applicable to the hollow pile under different parameters, and helps more accurately to judge the complete of building hollow pile pile body
Whole property and pile extension quality.
For solving problem present in existing hollow pile low strain integrity testing, the technical solution used in the present invention is: Yi Zhongjian
Build the low strain dynamic two-speed signal averaging detection method of thing hollow pile, the low strain dynamic two-speed signal averaging of this building hollow pile
Detection method is applied to the hollow pile body of building, and the method comprising the steps of:
Building hollow pile pile body end face determines beating point；
At building hollow pile stake top surface, and 135 ° positions at 45 ° with beating point are installed two signal pickup assemblies and are made
For the measuring point to building hollow pile pile body；
When receiving the hammer action at beating point, obtain from the measuring point signal of each signal pickup assembly and obtain
Comprise the two-speed test curve of each measuring point signal；
Two-speed curve is averaging processing the testing result obtained this building solid pile pile body.Further, institute
State hammer action to be hammered into shape by power or power rod vertically taps generation.
Further, when building hollow pile pile body is specially circular hollow pile, it is thick that beating point is positioned at a top surface pile lining
1/2 at optional position.
Further, when building hollow pile pile body is specially square hollow pile or polygon hollow stake, beating point is positioned at
At the 1/2 of stake top surface pile lining thickness, the midpoint of the length of side or the intersection point of adjacent two edges line.
Further, described signal pickup assembly is probe or sensor.
Further, described signal pickup assembly is pasted onto described building by stickums such as glue, butter or plasticine
On thing hollow pile stake top surface.
Further, a signal pickup assembly is installed in building hollow pile stake top surface, pile lining thick 1/2 at, and strike
Hit position a little at 45 °；Another signal pickup assembly is installed in building hollow pile stake top surface, at the 1/2 of pile lining thickness, with
Beating point becomes the position of 135 °.
Further, the information processing apparatus being connected with described signal pickup assembly is set to the low strain dynamic with two-speed pattern
Detector, such as common dual pathways low strain integrity testing instrument, and uses two-speed pattern.
Further, step " when receiving the hammer action at beating point, obtains the survey from each signal pickup assembly
Put signal and obtain comprising the two-speed test curve of each measuring point signal " particularly as follows:
When signal pickup assembly receives the beat action at beating point, the letter being connected with signal pickup assembly
Breath processing means is triggered, and information processor obtains simultaneously and records from being positioned at described building hollow pile stake top surface stake
At the 1/2 of wall thickness, the measuring point signal of two signal pickup assemblies of and 135 ° positions at 45 ° with beating point also obtains corresponding double
Velocity test curve.
Further, two-speed curve " is averaging processing and obtains the knot of the detection to this building solid pile pile body by step
Really." particularly as follows:
The two-speed signal obtained by information processor is carried out signal averaging, and the single speed generating one is bent
Line.
The technical scheme that embodiment disclosed by the invention provides can include following beneficial effect: a kind of of the present invention builds
The low strain dynamic two-speed signal averaging detection method of thing hollow pile, by striking at the beating point of building hollow pile body end face
Hit, utilize two signal pickup assemblies to obtain and the two-speed test curve of 135 ° positions at 45 ° with beating point, by double speed
The average treatment of degree signal, can substantially eliminate three-dimensional interference signal and wobbler action shearing wave.What signal averaging obtained is one
Bar single signal curve, it can help more accurately to judge integrity and the pile extension quality of building hollow pile pile body,
And the hollow pile under the conditions of being applicable to different parameters.
For making the above-mentioned purpose of the present invention, feature and advantage to become apparent, section Example cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below:
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by embodiment required use attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this
A little accompanying drawings obtain other relevant accompanying drawings.
Fig. 1 is the flow process signal of the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile
Figure；
Fig. 2 is that the first structure of the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile is shown
It is intended to；
Fig. 3 is that the first structural representation shown in Fig. 2 is in stake footpath 500mm, wall thickness 100mm, load pulsewidth 0.75ms condition
Under low strain dynamic two-speed signal averaging before and after time-history curves effect schematic diagram；
Fig. 4 is that the first structural representation shown in Fig. 2 is in stake footpath 500mm, wall thickness 100mm, load pulsewidth 0.75ms condition
Under low strain dynamic two-speed average signal and the prior art time-history curves of the single point signals that single-point sampling obtains 90 ° at contrast
Schematic diagram；
Fig. 5 is that the first structural representation shown in Fig. 2 is in stake footpath 800mm, wall thickness 100mm, load pulsewidth 0.75ms condition
Under low strain dynamic two-speed signal averaging before and after time-history curves effect schematic diagram；
Fig. 6 is that the first structural representation shown in Fig. 2 is in stake footpath 800mm, wall thickness 100mm, load pulsewidth 0.75ms condition
Under low strain dynamic two-speed average signal and the prior art time-history curves of the single point signals that single-point sampling obtains 90 ° at contrast
Schematic diagram；
Fig. 7 is the equivalent schematic of the first structural representation shown in Fig. 2；
Fig. 8 is that the second structure of the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile is shown
It is intended to；
Fig. 9 is that the second structural representation shown in Fig. 8 is in stake footpath 500mm, wall thickness 100mm, load pulsewidth 0.75ms condition
Under low strain dynamic two-speed signal averaging before and after time-history curves effect schematic diagram；
Figure 10 is that the second structural representation shown in Fig. 8 is in stake footpath 500mm, wall thickness 100mm, load pulsewidth 0.75ms condition
Under low strain dynamic two-speed average signal and 90 ° at single point signals time-history curves contrast schematic diagram；
Figure 11 is the equivalent schematic of the second structural representation shown in Fig. 8；
Figure 12 is the 3rd structure of the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile
Schematic diagram；
Figure 13 is that the 3rd structural representation shown in Figure 12 is in stake footpath 500mm, wall thickness 100mm, load pulsewidth 0.75ms article
The time-history curves effect schematic diagram before and after low strain dynamic two-speed signal averaging under part；
Figure 14 is that the 3rd structural representation shown in Figure 12 is in stake footpath 500mm, wall thickness 100mm, load pulsewidth 0.75ms article
The time-history curves contrast schematic diagram of low strain dynamic two-speed average signal under part and the single point signals at 90 °；
Figure 15 is the equivalent schematic of the 3rd structural representation shown in Figure 12；
Figure 16 is the two-speed average signal of the 3rd structural representation shown in the second structural representation shown in Fig. 8 and Figure 12
Contrast effect schematic diagram；
Main element symbol description:
100-hollow pile；200-exciting device (power hammer or power rod)；
300-information collecting device (probe or sensor)；(having the low of two-speed pattern should for 400-information processor
Become detector).
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Generally
Can with various different configurations arrange and design with the assembly of the embodiment of the present invention that show described in accompanying drawing herein.Cause
This, be not intended to limit claimed invention to the detailed description of the embodiments of the invention provided in the accompanying drawings below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, broadly falls into the scope of protection of the invention.
Unless otherwise defined, all of technology used in the present invention and scientific terminology and the technical field belonging to the present invention
The implication that is generally understood that of technical staff identical.The present invention is in the low strain dynamic two-speed signal averaging detection side of building hollow pile
The term used in the description of method is intended merely to describe the purpose of specific embodiment, it is not intended that limit the present invention.This
Term that invention is used " and/or " include the arbitrary and all of combination of one or more relevant Listed Items.
Below in conjunction with the accompanying drawings, the detailed description of the invention of the present invention is elaborated.
Embodiment 1
Fig. 1 is the flow process signal of the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile
Figure.The low strain dynamic two-speed signal averaging detection method of this building hollow pile is applied on building hollow pile pile body, the party
Method comprises the following steps:
In step s 11, building hollow pile stake top surface determines beating point.
Specifically, described building hollow pile pile body can be circular, square and polygon hollow stake.Described hammer action
For being hammered into shape by power or power rod vertically taps.For circular hollow pile, beating point is positioned at a top surface pile lining is thick 1/2
Optional position.For square and polygon hollow stake, beating point is positioned at a top surface pile lining is thick 1/2, the midpoint of the length of side or
The intersection point in two adjacent sidelines of person.
In one embodiment of this invention, described building hollow pile pile body is circular hollow pile, i.e. circular pile tube.Tap
Point is positioned at the arbitrfary point (dotted line circular arc as shown in Figure 2) at the 1/2 of a top surface wall thickness.
In another embodiment of the invention, described building hollow pile pile body is square hollow pile, the most square pile tube.Strike
Hit the midpoint (see Fig. 8) being a little positioned at the dashed square length of side at the 1/2 of a top surface wall thickness.
In another embodiment of the invention, described building hollow pile pile body is square hollow pile, the most square pile tube.Strike
Hit the point of intersection (see Figure 12) of the adjacent two edges line being a little positioned at the dashed square at the 1/2 of a top surface wall thickness.
It is appreciated that the hollow pile body of described building can be also other shape, such as the polygon hollow such as pentagon, hexagon
Pile body, broadly falls into as long as i.e. using the low strain dynamic two-speed signal averaging detection method of the present invention to detect the hollow pile body of building
The design of the present invention.
In step s 12, at building hollow pile stake top surface, two letters are installed in and 135 ° positions at 45 ° with beating point
Number harvester is as the measuring point to hollow pile pile body；
Specifically, described signal pickup assembly is probe or sensor.Described signal pickup assembly by glue, butter or
The stickums such as plasticine are pasted onto described building hollow pile stake top surface.It is empty that described signal pickup assembly is arranged on building
At the 1/2 of heart stake stake top surface pile lining thickness, and distinguish the at 45 ° and position of 135 ° with beating point.
In step s 13, when receiving the hammer action at beating point, obtain the survey from each signal pickup assembly
Put signal and obtain comprising the two-speed test curve of each measuring point signal.
Specifically, the information processing apparatus being connected with described signal pickup assembly is set to the low strain dynamic with two-speed pattern
Detector, such as common dual pathways low strain integrity testing instrument, and uses two-speed pattern.When receiving at the one of beating point
During secondary hammer action, by low strain integrity testing instrument, obtain from being positioned at described building hollow pile stake top surface pile lining thick simultaneously
1/2 at, and the measuring point signal of two signal pickup assemblies of and the position of 135 ° at 45 ° with beating point and obtain corresponding survey
Examination curve, repeatedly taps and will gather multiple two-speed signal.When performing signal and preserving, a plurality of two-speed signal will be averaged into
Being a two-speed signal, when i.e. signal preserves, instrument is the signal averaging that unit is carried out according to passage (or sensor), changes speech
It, when signal preserves, the signal that same probe (or measuring point) obtains under repeatedly tapping is averaged by instrument automatically, its mesh
Be the checking repeatability of signal, stability, and eliminate secondary disturbances or artificial disturbance.
In the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile, due to two signals
Harvester is different from the distance of beating point, in order to ensure time difference and the phase of interference signal that between each measuring point, Mintrop wave is incident
The accuracy of potential difference, it is necessary to use the low strain integrity testing instrument with two-speed pattern, sample under two-speed pattern simultaneously.
In step S14, two-speed curve is averaging processing and obtains the knot of the detection to this building solid pile pile body
Really.
Concrete, the two-speed test curve comprising each measuring point signal obtained by information processor is carried out letter
Number average, generate a single rate curve.In actual application scenarios, can be at information processor low strain integrity testing instrument
Signal processing interface by average for two curves in two-speed signal, or two-speed signal is imported and low strain integrity testing instrument
Supporting signal analysis software carries out signal averaging, it is possible to export to other data processing software is averaged.Averagely
Result be obtain one average after single rate curve.
The low strain dynamic two-speed signal averaging detection method of the building hollow pile of the present invention, by building hollow pile
Stake top surface determines beating point, gathers and the two-speed signature tune of two measuring points of 135 ° at 45 ° with beating point at stake top surface
Line also averagely obtains a single signal curve.Believed by the three-dimensional interference resulted from tapping areas that averagely eliminates of signal
Number and with the eccentric moment shearing wave propagated along pile body column, the method be applicable under different parameters under the conditions of hollow pile,
And can help to judge the pile body architecture quality of building pile body and pile extension quality more accurately.
Embodiment 2
Fig. 2 is that the first structure of the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile is shown
It is intended to.In the present embodiment, building hollow pile is circular hollow pile.
Exciting device 200 produces hammer action in the stake top surface of circular hollow pile 100, the arbitrfary point at the 1/2 of wall thickness,
At the 1/2 of the stake top surface wall thickness of circular hollow pile 100 and at 45 ° with beating point and 135 ° of positions are installed two signals and are adopted
Acquisition means is as the measuring point to hollow pile pile body.Information processor 400 is the low strain integrity testing instrument with two-speed pattern, surveys
Die trial formula uses two-speed pattern.
When exciting device 200 produces beat action at the stake top surface of circular hollow pile 100, by sensor and
Low strain integrity testing instrument, can obtain a two-speed signal comprising two rate curves.When exciting device produces again in same point
During raw hammer action, obtain the two-speed signal that Article 2 comprises two rate curves, repeatedly tap and will gather multiple two-speed
Signal, when signal preserves, instrument is the signal averaging that unit is carried out according to passage (or sensor), and we will obtain a bag
Two-speed signal containing two test curves.Follow-up, will be double at the signal processing interface of information processor low strain integrity testing instrument
Two curves in rate signal are average, or two-speed signal is imported the signal analysis software supporting with low strain integrity testing instrument
In carry out signal averaging, it is possible to export to other data processing software is averaged.Average result is to obtain one to put down
Single rate curve after all.
Seeing also Fig. 3, Fig. 3 is that the first structural representation shown in Fig. 2 is at stake footpath 500mm, wall thickness 100mm, load
The time-history curves effect schematic diagram before and after low strain dynamic two-speed signal averaging under the conditions of pulsewidth 0.75ms.Wherein, " averagely " have
Body refers to the number of the axis of ordinates two single channels (single-point) corresponding to upper for transverse axis (time shaft or stake are long) synchronization believed
Value (vertical velocity value) is averaged.
Fig. 3 shows, after and the signal averaging of two measuring points of 135 ° at 45 ° with beating point, and the three-dimensional in average signal
Interference signal is obviously reduced and the wobbler action shearing wave at signal rear portion disappears, therefore, and the two-speed proposed by this patent
Averaging method can significantly eliminate the interference signal in single point signals, such that it is able to help to judge building pile body more accurately
Pile body architecture quality and pile extension quality.
Seeing also Fig. 4, Fig. 4 is that the first structural representation shown in Fig. 2 is at stake footpath 500mm, wall thickness 100mm, load
Low strain dynamic two-speed average signal under the conditions of pulsewidth 0.75ms with use prior art 90 ° at single-point sample obtain list
The time-history curves contrast schematic diagram of some signal.Fig. 4 shows, compared with the single point signals used acquired in prior art, and two-speed
The interference signal of average signal weakens relatively.
Seeing also Fig. 5, Fig. 5 is that the first structural representation shown in Fig. 2 is at stake footpath 800mm, wall thickness 100mm, load
The time-history curves effect schematic diagram before and after low strain dynamic two-speed signal averaging under the conditions of pulsewidth 0.75ms.Fig. 5 shows, with percussion
After at 45 ° and two signal averagings of 135 ° of point, the interference signal in average signal is obviously reduced.
Seeing also Fig. 6, Fig. 6 is that the first structural representation shown in Fig. 2 is at stake footpath 800mm, wall thickness 100mm, load
Low strain dynamic two-speed average signal under the conditions of pulsewidth 0.75ms and the employing prior art single-point that single-point sampling obtains at 90 °
The time-history curves contrast schematic diagram of signal.Fig. 6 shows, compared with the single point signals used acquired in prior art, two-speed is put down
All interference signals of signal are obviously reduced.
Comparison diagram 4 and Fig. 6 understands, and along with the increase in stake footpath, uses the interference of the single point signals acquired in prior art to believe
Number being obviously enhanced, this is due to along with the increase in stake footpath or the reduction of load pulsewidth, between hollow pile stake end face different measuring points
The regularity of distribution of three-dimensional interference signal power changes, and it is hollow that the most existing method is not generally applicable under different parameters
Stake.On the other hand, along with the increase in stake footpath, the average signal of two-speed averaging method still can eliminate interference signal significantly.
In other words, along with increase or the reduction of load pulsewidth in stake footpath, two-speed averaging method compared with the method for sampling of prior art, its
The ability eliminating interference signal becomes more to highlight with effect.
The principle of the hollow pile two-speed averaging method that the present invention proposes is: when tapping in building hollow pile surface,
Except creating the compressional wave propagated along pile body in hollow pile pile body, at the vertical section at the diameter place of angle in 90 ° with impacting point
Both sides, there is also three-dimensional interference ripple and the eccentric moment shearing wave of antisymmetry distribution.When simultaneously gather with beating point at 45 ° and
The signal of two measuring points of 135 ° is average, both impacts after can eliminating the most significantly.Explanation from pile body vibration angle
For, tap in building hollow pile surface, not only create the axisymmetric vibration shape, and create the nonaxisymmetrical vibration shape.
When gathering and the signal of two measuring points of 135 ° at 45 ° with beating point the most simultaneously, non-axis symmetry can be eliminated the most significantly
The impact of the vibration shape.
Due to the low strain dynamic two-speed signal averaging detection method at building hollow pile a kind of shown in Fig. 2 of the present invention
In one structural representation, structure is symmetrical with the vertical section at beating point and line place, stake midpoint, so, scheme shown in Fig. 2 and Fig. 7
Shown in the testing result of scheme consistent, i.e. Fig. 7 is the equivalent schematic of the first structural representation shown in Fig. 2, related content this
Place repeats no more.Additionally, due to structure is symmetrical with the vertical section at beating point and line place, stake midpoint, can be further by Fig. 2
The second shown structural representation and with two measuring points of the equivalent schematic shown in Fig. 7 along by beating point place diameter
Vertical section does mirror image simultaneously, the test result that the measuring point combination after mirror image obtains and Fig. 2 and Fig. 7 equivalence.So, real work
In, with tap corresponding measuring point at the arbitrfary point at the 1/2 of stake top surface wall thickness be disposed with 4 kinds of combinations, i.e. Fig. 2 and Tu
Point layout combination shown in 7 and both do the combination of the point layout after mirror image.
Embodiment 3
Fig. 8 is that the second structure of the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile is shown
It is intended to.In the present embodiment, building hollow pile is square hollow pile.
Exciting device 200 the stake top surface pile lining of square hollow pile 100 thick 1/2, the midpoint of the length of side produces and taps
Action, at the 1/2 of the stake top surface wall thickness of square hollow pile 100 and beating point is at 45 ° and two signals are installed in 135 ° of positions
Harvester is as the measuring point to hollow pile pile body.Information processor 400 is the low strain integrity testing instrument with two-speed pattern,
Test pattern uses two-speed pattern.
Concrete percussion and sampling step see example 2, and here is omitted.
Seeing also Fig. 9, Fig. 9 is that the second structural representation shown in Fig. 8 is at stake footpath 500mm, wall thickness 100mm, load
The time-history curves effect schematic diagram before and after low strain dynamic two-speed signal averaging under the conditions of pulsewidth 0.75ms.Fig. 9 shows, with percussion
After at 45 ° and two signal averagings of 135 ° of point, the three-dimensional of average signal disturbs signal to be obviously reduced.
Seeing also Figure 10, Figure 10 is that the second structural representation shown in Fig. 8 is stake footpath 500mm, wall thickness 100mm, lotus
Carry the time-history curves contrast signal of the low strain dynamic two-speed average signal under the conditions of pulsewidth 0.75ms and the single point signals at 90 °
Figure, the latter is to apply mechanically the sampling optimization of circular hollow pile in prior art.Figure 10 shows, the single-point letter at place in 90 ° with beating point
Number comparing, the interference signal of two-speed average signal is obviously reduced, additionally, similar with circular pile tube, along with the increase in stake footpath, just
Single point signals sampling method at the two-speed averaging method of shape hollow pile and 90 ° is compared, its ability eliminating interference signal and effect
To become more to highlight.Therefore, the two-speed averaging method proposed by this patent can significantly eliminate doing in single point signals
Disturb signal, such that it is able to help to judge more accurately pile body architecture quality and the pile extension quality pile extension quality of building pile body.
The second structure for the low strain dynamic two-speed signal averaging detection method of building hollow pile a kind of shown in Fig. 8 is shown
The principle of the two-speed averaging method being intended to, sees example 2, and here is omitted.
Due to the low strain dynamic two-speed signal averaging detection method at building hollow pile a kind of shown in Fig. 8 of the present invention
In two structural representations, structure is symmetrical with the vertical section at beating point and line place, stake midpoint, so, scheme shown in Fig. 8 and figure
The testing result of scheme shown in 11 is consistent, i.e. Figure 11 is the equivalent schematic of the second structural representation shown in Fig. 8, inside the Pass phase
Here is omitted for appearance.
Additionally, due to structure is symmetrical with the vertical section at beating point and line place, stake midpoint, can be further by shown in Fig. 8
The second structural representation and with perpendicular along by beating point place diameter of two measuring points of the equivalent schematic shown in Figure 11
Section does mirror image simultaneously, the test result that the measuring point combination after mirror image obtains and Fig. 8 and Figure 11 equivalence.So, in real work,
With in the 1/2 of stake top surface pile lining thickness, the midpoint of the length of side taps corresponding point layout 4 kinds of combinations, i.e. Fig. 8 and Figure 11
Shown point layout combination and both do the point layout combination after mirror image.
Embodiment 4
Figure 12 is the 3rd structure of the low strain dynamic two-speed signal averaging detection method of the present invention a kind of building hollow pile
Schematic diagram.In the present embodiment, building hollow pile is square hollow pile.
Exciting device 200 is at the 1/2 of the stake top surface pile lining thickness of square hollow pile 100, the intersection point of adjacent two edges line
Produce eccentric hammer action, at the stake top surface of circular hollow pile 100, the 1/2 of wall thickness and beating point is at 45 ° and 135 ° of positions
Put and install two signal pickup assemblies as the measuring point to hollow pile pile body.Information processor 400 is for having two-speed pattern
Low strain integrity testing instrument, test pattern uses two-speed pattern.
Concrete percussion and sampling step see example 2, and here is omitted.
Seeing also Figure 13, Figure 13 is that the 3rd structural representation shown in Figure 12 is stake footpath 500mm, wall thickness 100mm, lotus
Carry the time-history curves effect schematic diagram before and after the low strain dynamic two-speed signal averaging under the conditions of pulsewidth 0.75ms.Figure 13 shows, with
Beating point two single point signals at 45 ° and 135 ° are compared, and the three-dimensional interference signal of average signal is obviously reduced.
Seeing also Figure 14, Figure 14 is that the 3rd structural representation shown in Figure 12 is stake footpath 500mm, wall thickness 100mm, lotus
Carry the time-history curves contrast signal of the low strain dynamic two-speed average signal under the conditions of pulsewidth 0.75ms and the single point signals at 90 °
Figure, the latter is to apply mechanically the sampling optimization of circular hollow pile in prior art.Figure 14 shows, with the single point signals sampling method at 90 °
Comparing, the interference signal of two-speed average signal is obviously reduced, and, similar with circular pile tube, along with the increase in stake footpath, square
The two-speed averaging method of hollow pile is compared with single point signals sampling method, and its ability eliminating interference signal will become more with effect
Prominent.Therefore, the two-speed averaging method proposed by this patent can significantly eliminate the interference signal in single point signals, thus
Can help to judge the pile body architecture quality of building pile body and pile extension quality more accurately.
The 3rd structure for the low strain dynamic two-speed signal averaging detection method of building hollow pile a kind of shown in Figure 12
The principle of the two-speed averaging method of schematic diagram, sees example 2, and here is omitted.
Due to the low strain dynamic two-speed signal averaging detection method at building hollow pile a kind of shown in Figure 12 of the present invention
In 3rd structural representation, structure is symmetrical with the vertical section at beating point and line place, stake midpoint, so, scheme shown in Figure 12 with
The testing result of scheme shown in Figure 15 is consistent, i.e. Figure 15 is the equivalent schematic of the second structural representation shown in Figure 12, relevant
Here is omitted for content.
Additionally, due to structure is symmetrical with the vertical section at beating point and line place, stake midpoint, can be further by Figure 12 institute
The second structural representation of showing and with two measuring points of the equivalent schematic shown in Figure 15 along by beating point place diameter
Vertical section does mirror image simultaneously, the test result that the measuring point combination after mirror image obtains and Figure 12 and Figure 15 equivalence.So, real work
In, at 1/2 thick with at stake top surface pile lining, the point of intersection of adjacent two edges line tap corresponding measuring point be disposed with 4 kinds
Combination, i.e. the point layout combination shown in Figure 12 and Figure 15 and both do the combination of the point layout after mirror image.
Figure 16 is the two-speed average signal pair of the 3rd structural representation shown in the second structural representation shown in Fig. 8 and Figure 12
Than figure.Figure 16 shows, both test signal and overlap, i.e. both test equivalent.In embodiment 3 and embodiment 4, the present invention
Device and embodiment 2 that embodiment is provided are similarly the same, and its technique effect realizing principle and generation is similar with embodiment 2,
For briefly describing, the not mentioned part of embodiment of the method part, refer to corresponding contents in embodiment 2.
The low strain dynamic two-speed signal averaging detection method of the building hollow pile of the present invention is by building hollow pile
The stake top surface of pile body taps, and collecting pile top surface is at 45 ° with beating point and the two-speed signal of 135 ° of positions, by signal
Averagely eliminate three-dimensional interference signal and eccentric moment shearing wave, such that it is able to the hollow pile under being applicable to different parameters, and
Can more accurately judge pile body architecture quality and the pile extension quality of building pile body.It should be noted however that the present invention
Given in the beating point that goes out and sampled point allow certain skew, signal acquisition point and beating point institute angulation in the position of hoop
Spend 45 ° and 135 ° and also still allow for a range of skew.
The low strain dynamic two-speed signal averaging detection method of the building hollow pile of the present invention, the hollow pile body of described building
Can be circular, square and polygon, such as the polygon hollow pile body such as pentagon, hexagon.For other example not be given,
Device provided by the present invention is identical, and its technique effect realizing principle and generation is similar with preceding method embodiment, for briefly
Describe, the not mentioned part of embodiment of the method part, refer to corresponding contents in preceding method embodiment.
Flow chart and block diagram in accompanying drawing show the system of multiple embodiments according to the present invention, method and computer journey
Architectural framework in the cards, function and the operation of sequence product.In this, each square frame in flow chart or block diagram can generation
One module of table, program segment or a part for code, a part for this module, program segment or code comprise one or more for
Realize the executable instruction of the logic function of regulation.It should also be noted that at some as in the realization replaced, square frame is marked
Function can also occur to be different from the order that marked in accompanying drawing.Such as, two continuous print square frames can essentially be basic
Being performed in parallel, they can also perform sometimes in the opposite order, and this is depending on involved function.It is also noted that
The combination of the square frame in each square frame in block diagram and/or flow chart and block diagram and/or flow chart, can be with performing regulation
Function or the special hardware based system of action realize, or can be with the combination of specialized hardware with computer instruction
Realize.
In several embodiments provided herein, it should be understood that disclosed mthods, systems and devices, permissible
Realize by another way.Device embodiment described above is only schematically, such as, and the division of this module, only
Being only a kind of logic function to divide, actual can have other dividing mode when realizing, and the most such as, multiple modules or assembly are permissible
In conjunction with or be desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed
Coupling each other direct-coupling or communication connection can be the indirect coupling by some communication interfaces, device or unit
Close or communication connection, can be electrical, machinery or other form.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a low strain dynamic two-speed signal averaging detection method for building hollow pile, the low strain dynamic of this building hollow pile is double
Rate signal average detected method is applied to building hollow pile pile body, it is characterised in that the method comprising the steps of:
Building hollow pile pile body end face determines beating point；
At building hollow pile stake top surface, two signal pickup assemblies are installed as right in and 135 ° positions at 45 ° with beating point
The measuring point of building hollow pile pile body；
When receiving the hammer action at beating point, obtain from the measuring point signal of each signal pickup assembly and comprised
The two-speed test curve of each measuring point signal；
Two-speed curve is averaging processing the testing result obtained this building solid pile pile body.
The low strain dynamic two-speed signal averaging detection method of building hollow pile the most according to claim 1, its feature exists
In, described hammer action is hammered into shape by power or power rod vertically taps generation.
The low strain dynamic two-speed signal averaging detection method of building hollow pile the most according to claim 1, its feature exists
In, when building hollow pile pile body is specially circular hollow pile, it is any that beating point is positioned at a top surface pile lining is thick 1/2
Position.
The low strain dynamic two-speed signal averaging detection method of building hollow pile the most according to claim 1, its feature exists
In, when building hollow pile pile body is specially square hollow pile or polygon hollow stake, beating point is positioned at a top surface pile lining
At thick 1/2, the midpoint of the length of side or the intersection point of adjacent two edges line.
The low strain dynamic two-speed signal averaging detection method of building hollow pile the most according to claim 1, its feature exists
In, this signal pickup assembly is probe or sensor.
The low strain dynamic two-speed signal averaging detection method of building hollow pile the most according to claim 1, its feature exists
In, described signal pickup assembly is pasted onto described building hollow pile stake top by stickums such as glue, butter or plasticine
Surface.
The low strain dynamic two-speed signal averaging detection method of building hollow pile the most according to claim 1, its feature exists
In, a signal pickup assembly is installed in building hollow pile stake top surface, at the 1/2 of pile lining thickness, and the position at 45 ° with beating point
Put；Another signal pickup assembly is installed in building hollow pile stake top surface, at the 1/2 of pile lining thickness, becomes 135 ° with beating point
Position.
The low strain dynamic two-speed signal averaging detection method of building hollow pile the most according to claim 1, its feature exists
In, the information processing apparatus being connected with described signal pickup assembly is set to the low strain integrity testing instrument with two-speed pattern, and
Use two-speed pattern.
The low strain dynamic two-speed signal averaging detection method of building hollow pile the most according to claim 8, its feature exists
", obtain from the measuring point signal of each signal pickup assembly when receiving the hammer action at beating point and obtain in, step
Comprise the two-speed test curve of each measuring point signal " particularly as follows:
When signal pickup assembly receives the beat action at beating point, at the information being connected with signal pickup assembly
Reason device is triggered, and information processor obtains simultaneously and record from being positioned at described building hollow pile stake top surface pile lining thick
1/2 at, the measuring point signal of two signal pickup assemblies of and 135 ° positions at 45 ° with beating point also obtains corresponding two-speed
Test curve.
Low strain dynamic two-speed its feature of signal averaging detection method of building hollow pile the most according to claim 1 exists
" two-speed curve is averaging processing the testing result obtained this building solid pile pile body " in, step particularly as follows:
The two-speed signal obtained by information processor is carried out signal averaging, generates the single rate curve of.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107142977A (en) * | 2017-07-10 | 2017-09-08 | 荣垂强 | Low strain dynamic two-speed signal averaging detection method under the percussion of building foundation center |
| CN107190789A (en) * | 2017-07-10 | 2017-09-22 | 荣垂强 | A kind of load pulsewidth system of selection of Low Strain Dynamic Testing of Piles |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH109847A (en) * | 1996-06-26 | 1998-01-16 | Aoki Corp | Method for diagnosing shape of artificial or natural structure |
| CN102877490A (en) * | 2012-09-18 | 2013-01-16 | 河海大学 | Method for detecting quality of large-diameter tubular pile at low strain |
-
2016
- 2016-08-24 CN CN201610717690.1A patent/CN106320395B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH109847A (en) * | 1996-06-26 | 1998-01-16 | Aoki Corp | Method for diagnosing shape of artificial or natural structure |
| CN102877490A (en) * | 2012-09-18 | 2013-01-16 | 河海大学 | Method for detecting quality of large-diameter tubular pile at low strain |
Non-Patent Citations (1)
| Title |
|---|
| 薛桂霞等: "基桩桩身完整性检测中的影响因素浅析", 《地球物理学进展》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107142977A (en) * | 2017-07-10 | 2017-09-08 | 荣垂强 | Low strain dynamic two-speed signal averaging detection method under the percussion of building foundation center |
| CN107190789A (en) * | 2017-07-10 | 2017-09-22 | 荣垂强 | A kind of load pulsewidth system of selection of Low Strain Dynamic Testing of Piles |
| CN107190789B (en) * | 2017-07-10 | 2018-07-13 | 荣垂强 | A kind of load pulsewidth selection method of Low Strain Dynamic Testing of Piles |
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| CN106320395B (en) | 2018-08-17 |
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