CN1700042A - Harmless measuring method and device for analyzing and determining underground pile penetration length - Google Patents
Harmless measuring method and device for analyzing and determining underground pile penetration length Download PDFInfo
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- CN1700042A CN1700042A CNA2004100766337A CN200410076633A CN1700042A CN 1700042 A CN1700042 A CN 1700042A CN A2004100766337 A CNA2004100766337 A CN A2004100766337A CN 200410076633 A CN200410076633 A CN 200410076633A CN 1700042 A CN1700042 A CN 1700042A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/028—Analysing fluids by measuring mechanical or acoustic impedance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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Abstract
The invention discloses a non-destructive inspection method and a hammer of a non-destructive inspection apparatus for analyzing and determining underground pile penetration length. The hammer of a non-destructive inspection apparatus comprises a steel main body for impacting, a handle connected with the steel main body and a strain sheet for applying impact force. The non-destructive inspection method comprises steps: a digging step for forming an inserting space portion, a cylindrical pipe inserting step for putting the cylindrical pipe into the inserting space portion, a receiver inserting step for inserting the receiver into the cylindrical pipe and an analyzing step for measuring and analyzing impact force signals generated by hammer knocking. When lifting the receiver in the cylindrical pipe at presetting intervals orderly, knocking the side of buildings in presetting intervals, the analyzer analyzes and measures impact force signals generated by knocking the side of buildings and horizontal elastic waves.
Description
Technical field
The present invention relates to a kind of following definitely the penetration length and the non-destructive measuring method of existence thereof, and the employed damage-free measuring apparatus of this method.Specifically, thereby the present invention relates to a kind of zone that exists building structure to cause to realize the detection of stake at the stake top that is applicable to, the non-destructive measuring method that the damage of the penetration length of stake and existence is analyzed, this method is the state according to building structure, by level or the buildings that vertically pounds with a hammer produce the horizontal resiliency ripple, bury pvc pipe underground in the side regions that contiguous pre-peg exists with hollow space, the receiver that can receive the horizontal resiliency ripple is put into the hollow space of pvc pipe, horizontal resiliency ripple that is knocked generation by hammer and the horizontal resiliency ripple that is produced by earth are received and analyze, thus following definitely penetration length and existence thereof.
In addition, the invention still further relates to a kind of hammer of damage-free measuring apparatus, no matter knock side or the surface that comprises a building structure of level head or building structure from any direction, it also can produce the horizontal resiliency ripple, measures the impulsive force produced and transmits the horizontal resiliency ripple to the depths.
Background technology
As a rule, along with industrial expansion, bridge, harbour and dwelling house etc. are along with the progress in epoch becomes increasing, more and more higher.
Such building must have and is embedded in its underground stake and supports them.
This class stake comprises cast-in-place peg, large size cast-in-place peg, driven pile, precast prestressed concrete stake (PC), opens centrifugal strong concrete stake (PHC), steel-pipe pile or the like in advance.Usually this class stake is embedded in the underground lithosphere.But, this class stake is being embedded to underground lithosphere or is carrying out in the process of concrete depositing, driven pile, precast prestressed concrete stake (PC), open centrifugal strong concrete stake (PHC) in advance, distortion or fracture may appear in steel-pipe pile.Say that further the bottom of the depths of cast-in-place peg is because phreatic influence can occur cellular or the outside surface fracture.
The problems referred to above that occur in order to learn and the method taked comprises static and dynamic loads method of testing, impact elasticity ripple method of testing, air to air the velocity of sound writes down method of testing, horizontal resiliency ripple method of testing or the like.And all these method of testings related all be a kind of non-destructive testing method of the underground stake that does not have building structure thereon being implemented whole test.
For example the impact elasticity in above-mentioned four kinds of conventional test methodologies is tested below and carry out brief description.As shown in Figure 1, by with hammer 1, i.e. elastic wave generation unit, the top 3 of vertically knocking stake 2 produces elastic waves 4.Jug 5 levels that receive horizontal resiliency ripple 4 are installed in the top 3 of stake 2, and with the hammer 1 that produces elastic wave 4 on same line.Jug 5 receives the close echo that arrives stake 2 bottoms from elastic wave 4, thereby determines the penetration length of stake 2.
Yet said method is a kind of in order to detect the aforesaid method that does not have the stake of building structure above it and construct.If there is building structure above stake, that just can not produce elastic wave by the top of the stake that pounds with a hammer.Why can not use this hammer when there is buildings in the top of stake, reason will be set forth in the description of following hammer about the non-destructive testing device particularly.
Because the distortion of underground stake or fracture, phreatic influence are in the fracture of the cellular or outside surface that the bottom produced of stake, buildings on stake top such as bridge, harbour, house will produce non-uniform settling, thereby cause buildings to go wrong, therefore, determine that a penetration length of the foundation that is buildings and existence thereof are just very necessary.But, up to now, also do not analyze the existence of the stake of buildings bottom, process is damaged and the method for similar problem solves these problems.
In view of the above problems, the method that detects the existence of buildings load-carrying ability and assessment stake and damage comprise by excavate stake or buildings around, thereby check intuitively whether stake exists the method for the position of damaging and damaging; Nearly buildings bottom is provided with settlement gauge and inclinometer is determined the continuous sedimentation of buildings and the method at inclination angle by drilling.Yet a kind of method in back can not be measured stake and exist.
In said method, thereby preceding a kind of method is to check intuitively by the excavation of buildings periphery, but existing problem is, in practical operation, be not easy to realize the excavation of buildings bottom, even and excavate, also need large-scale excavator and in order to solve the building safety problem that excavation brings and the main equipment of transferring, these all will cause consuming a large amount of time and moneys.
In addition, back a kind of method existing problem is, although can understand the continuous sedimentation and the inclination angle of superstructure, cause the definite reason of sedimentation and inclination not analyze and draw, and this method also will consume a large amount of Measuring Time and money.
As shown in Figure 2; in traditional non-destructive testing device, impact the steel body 10 that the hammer 1 that produces the horizontal resiliency ripple comprises generation horizontal resiliency ripple by applying; measurement produces the cylindrical member 11 of the power of horizontal resiliency ripple in steel body 10; be connected to the handle 12 on the steel body 10; a side that is attached to steel body 10 is used for protecting the rubberite 13 for the cylindrical member 11 of shock-sensitive; be installed in the cable 14 of the signal that is used for transmitting the power that records by cylindrical member 11 in steel body 10 and the handle 12 and be coupled in cable termination 17 on the coupling arrangement (not shown) of an end of the cable 16 that is connected with analyzer 15 in order to transmit signals to analyzer 15.
The hammer 1 of structure like this only can be implemented the measurement for the treatment of peg or buildings with a directional correlation, and this is that cylindrical member only can be measured the power on the direction because of the characteristic in view of cylindrical member 11.If think following definitely penetration length, be feasible when only not having buildings at the top of stake, still, when there is buildings in the top of stake, determine that the penetration length of stake is just infeasible.
That is to say, as mentioned above, for following penetration length definitely, the top of the stake that must pound with a hammer.Therefore, under the situation that has buildings above the stake, the top of the buildings that only can pound with a hammer, this just makes the penetration length of accurately determining stake infeasible.
And if the side of the buildings that pounds with a hammer, that just is not penetration length and existence thereof in the stake of the bottom of determining to be embedded in buildings, but determines the thickness of buildings side.
Show that about the penetration length of determining stake or the elaboration of its existence the detection that stake exists does not only utilize a hammer just can realize, but will utilize a non-destructive testing device of forming by hammer, receiver, analyzer to realize.Above-mentioned explanation is only made for the best explain to technology contents.
In addition; though being used for following definitely the penetration length and the hammer of existence thereof only can bring into play its performance completely by measuring nondirectional power, it has adopted expensive cylindrical member and has been attached to the rubberite that the steel body just applies a side of impact in order to protect cylindrical member.This has just weakened hammers the strength of launching high-quality elastic wave in the blasting operation medium and long distance into shape.Furtherly, because analyze the impact that deep stake needs sizable power, this just may damage shock-sensitive cylindrical member.Further, under the situation that cylindrical member is damaged, cylindrical member can not be repaired, and therefore must change whole hammer.
Summary of the invention
The present invention designs in order to solve the problem of mentioning in the prior art, therefore, the purpose of this invention is to provide a kind of damage-free measuring apparatus in order to be formed from steel fully to depths emission level elastic wave at a distance, this device can utilize no matter the hammer with complete non-directional foil gauge is the side that impacts buildings, the penetration length and the existence thereof of stake can both be detected in the surface still top of stake, and this device comprises the receiver that can receive the horizontal resiliency ripple signal that is produced by hammer and is used for analyzing the impulsive force signal that produced by hammer and the analyzer of the horizontal resiliency ripple signal that received by receiver.
Another object of the present invention provides can change easily when a kind of foil gauge that has in being installed in hammer damages and is used for the hammer of damage-free measuring apparatus of embedded space part of attachment/detachment foil gauge, wherein the embedded space part inside surface at hammer has screw thread, and has engagement bolt with screw-threaded engagement, owing to impact the damage that causes, the opposite side that foil gauge impacts from enforcement is packed into and is adorned with the epoxy film plastic packaging in order to prevent.
Another object of the present invention provides a kind of by utilizing the above-mentioned damage-free measuring apparatus of being made up of hammer, receiver and analyzer to determine and analyzing the penetration length of underground stake and the non-destructive measuring method of existence thereof, this method may further comprise the steps: form the excavation step of inserting space segment, so that with the be separated by place of a preset distance of underground stake to be measured, insertion has the cylindrical tube of hollow space, and the degree of depth surpasses underground stake top; Cylindrical tube is put into the cylindrical tube inserting step of inserting the space; The receiver that can receive the horizontal resiliency ripple is put into the receiver inserting step of cylindrical tube; A hammer of top buildings side that pounds with a hammer knocks step; Measure and analyze because the impulsive force signal that the side of the buildings that pounds with a hammer produces and the analytical procedure of horizontal resiliency ripple signal.
Another object of the present invention provides a kind ofly to be determined and analyzes the penetration length of underground stake and the non-destructive measuring method of existence thereof, may further comprise the steps: operation commencing signal input step (a), for the top that may have regional buildings in stake produces the horizontal resiliency ripple, utilize hammer to apply power on the buildings top by the user and produce the input operation commencing signal; Horizontal resiliency ripple receiving step (b) produces the input of horizontal resiliency ripple to the superstructure that may imbed stake in step (a), and receives the horizontal resiliency ripple by receiver; And image output step display (c), by be combined in step (a) and (b) in the penetration length and the existence thereof of the horizontal resiliency ripple record that receives, the damage result of stake is stored in data storage cell, and shows these results by the image output unit.
To achieve these goals, the invention provides and a kind ofly utilize damage-free measuring apparatus to determine and analyze the penetration length of underground stake and the non-destructive measuring method of existence thereof, it may further comprise the steps: form the excavation step of inserting space segment, so that with the be separated by place of a preset distance of underground stake to be measured, insertion has the cylindrical tube of hollow space, and the degree of depth surpasses underground stake top; Cylindrical tube is put into the cylindrical tube inserting step of inserting the space; The receiver that can receive the horizontal resiliency ripple is put into the receiver inserting step of cylindrical tube; A hammer of top buildings side that pounds with a hammer knocks step; And measure and analyze because the impulsive force signal that the side of the buildings that pounds with a hammer produces and the analytical procedure of horizontal resiliency ripple signal.
The hammer that uses in damage-free measuring apparatus comprises: apply and impact the main body that produces the horizontal resiliency ripple, be connected to handle easy to use on the main body, measure the sensor of the impulsive force of the impact that applies, wherein main body is made of steel fully and is had the embedded space part that can embed sensor at the one end, inside surface in the embedded space part has thread engagement and engagement bolt, by the embedded sensor of the engages fixed of bolt and screw thread, therefore, the steel main body is easy to produce elastic wave, and is convenient to change when sensor damages.
Preferably, sensor is to have good resistance impact durability and complete direction-free foil gauge.Foil gauge is embedded into the embedded space part of main body, and by the screw thread of embedded space part inside surface and engagement bolt, installation.Preferably, avoid impacting, it is adorned and be installed in the opposite side that impacts part with the epoxy film plastic packaging in order to protect it.
Description of drawings
With reference to accompanying drawing, embodiment is described to make purpose of the present invention and other aspects clearer from behind.In the accompanying drawing:
Fig. 1 is top schematic block diagram of non-destructive measuring method of penetration length of following definitely when not having buildings;
Fig. 2 is the sectional view of the hammer of the schematic block diagram of damage-free measuring apparatus and traditional damage-free measuring apparatus;
Fig. 3 is the damage-free measuring apparatus block diagram;
Fig. 4 is the sectional view of the hammer of damage-free measuring apparatus schematic block diagram of the present invention and damage-free measuring apparatus;
Fig. 5 is the penetration length of following definitely of the damage-free measuring apparatus according to the present invention and the process flow diagram flow chart of existence thereof;
Fig. 6 is the oscillogram of the constitutional diagram of underground stake and the stake state determined according to non-destructive measuring method of the present invention; And
Fig. 7 is the oscillogram of constitutional diagram of another underground stake and the stake state determined according to non-destructive measuring method of the present invention;
DETAILED DESCRIPTION OF THE PREFERRED
In the following description, with reference to the accompanying drawings the non-destructive measuring method of pile penetration length and existence thereof and this method descended definitely of the present invention is described according to the employed damage-free measuring apparatus of the preferred embodiment of the present invention.
Fig. 3 is the schematic block diagram of damage-free measuring apparatus of the present invention.Fig. 4 is the schematic block diagram of damage-free measuring apparatus of the present invention and the hammer sectional view of damage-free measuring apparatus.Fig. 5 is the penetration length of following definitely of the damage-free measuring apparatus according to the present invention and the process flow diagram flow chart of existence thereof.Fig. 6 is the oscillogram of the constitutional diagram of underground stake and the pile anchoring state determined according to non-destructive measuring method of the present invention.Fig. 7 is the oscillogram of constitutional diagram of another underground stake and the stake state determined according to non-destructive measuring method of the present invention.
As shown in Figure 3, damage-free measuring apparatus 100 of the present invention comprises: hammer 200, and receiver 300, analyzer 400 connects the coupling arrangement A 500 of hammer 200 and analyzer 400 and is connected receiver 300 and the coupling arrangement B 600 of analyzer 400.
As shown in Figure 4, hammer 200 is used for applying impact, measures by the apply impulsive force of impacting generation, and it is passed to analyzer 400.Hammer 200 comprises the main body 201 that applies impact, be connected to the handle 202 on the main body 201, be installed in the foil gauge 203 of measuring the impulsive force that produces by the impact that is applied in the main body 201, be installed in the handle 202 and be connected the cable 204 that the impulsive force signal that foil gauge is measured sends analyzer 400 to foil gauge 203, and with cable 204 be connected, be installed in handle 202 interior extremity and with the cable termination 205 of coupling arrangement A500 engagement, be used for being connected with analyzer 400.
More particularly, main body 201 is made of steel fully, side in main body 201 has the embedded space part 206 that embeds foil gauge 203, inside surface in embedded space part 206 has and the thread engagement 207 that meshes bolt 208 engages fixed foil gauges 203, therefore, all steel body 201 is easy to produce elastic wave, and is convenient to change when sensor damages.
In addition, foil gauge 203 is inserted into embedded space part 206, and is formed on screw thread 207 and bolt 208 fixed installations in the embedded space part 206.Preferably, avoid impacting, foil gauge is installed in the opposite side that impacts part 209 in order to protect foil gauge, and by epoxy film plastic packaging dress.
Main body 201 and hammer 200 handle 202 into shape and can make cylinder, rectangular column, hexagon post, triangular column and similar arbitrary shape.But, for the user with its convenience of knocking, it is made cylindrical more desirable.
Because main body 201 is made of steel fully, therefore, above-mentioned hammer 200 can be to very dark regional emission level elastic wave.
In addition, as the sensor of measuring the impulsive force signal that produces the horizontal resiliency ripple, use complete direction-free foil gauge 203.
In order to detect the penetration length and the existence thereof of underground stake, be connected with analyzer 400 with receiver 300 by the hammer of forming by steel body 201 and direction-free foil gauge 203 200, when the penetration length of hope inspection stake and when existing, might realize the penetration length of the stake that is embedded in very dark zone and the measurement of existence thereof.In addition, even the penetration length of underground stake and the measurement of existence thereof also might be realized in the side or the surface of the buildings on the top of the horizontal ends of impact stake or stake.
More particularly, foil gauge 203 can be measured the impulsive force signal from any direction.If be adapted to penetration length and the existence thereof that foil gauge 203 detects underground stake by the hammer 200 that is installed on damage-free measuring apparatus 100, so no matter whether exist buildings can realize its measurement on the top of stake.
In other words, promptly use hammer 200 side or the surfaces of knocking the buildings at a top, also can determine the penetration length and the existence thereof of stake.
Here be not that expression is only by using hammer 200 just can realize this detection about the penetration length of stake and the elaboration of determining or measuring of existence thereof, but expression being connected by the hammer 200 formed by steel body 201 and foil gauge 203 and receiver 300 and analyzer 400, to be sent to analyzer 400 by the horizontal resiliency ripple signal of hammering 200 impact generations into shape and impulsive force signal and carry out signal analysis, realize detection thereby obtain waveform.
Here foil gauge 203 is made brief explanation.Foil gauge is divided into the electric foil gauge that is applied in the electrical measurement and is applied to the mechanical strain sheet of mechanical measurement.The strain of the measure of the change structure that the electricity foil gauge takes place in the structure deformation process by the resistance that is attached on the structure, the mechanical strain sheet is by the strain of the subtle change measurement structure body of mechanical measurement distance between two points.
In hammer 200 of the present invention, adopted to have excellent durability and complete direction-free electric foil gauge 203.Yet even small vibrations, minute movement or impact, foil gauge all can produce the signal of power.Therefore, adapt, adopt the foil gauge of the impulsive force signal in the scope that only can be received in certain force, perhaps in analyzer 400, be equipped with wave filter with the signal in the scope that only can respond to specific impulsive force in order to make foil gauge 203 and hammer 200.
In this manual, the scope of certain force refers to by removing because the impulsive force that small vibrations or small impact produce is only measured the impulsive force of being knocked the buildings generation by hammer 200.In general, it only measures the signal of the power in frequency span scope up and down.
As shown in Figure 3, receiver 300 adopts velograph, jug or the like usually, is used for receiving the horizontal resiliency ripple that is produced by hammer 200, and sends it to analyzer 400.
Analyzer 400 of the present invention comprises: for hammering 200 into shape, receiver 300 and analyzer 400 provide the power panel 401 of power supply, give the interface board 402 of filter unit 403 with what receive from hammer 200 and the data signal transmission of receiver 300, the data-signal that inspection comes from interface board 402 whether drop on to be measured on/following frequency span scope within, and only will drop on/signal within the following frequency span scope sends the filter unit 403 of data acquisition board 404 to, storage comes from the data acquisition board 404 of data of filter unit 403, has by adopting rudimentary algorithm comparison and the data of analyzing stored in data acquisition board 404 to judge the computing machine plate 405 of processor of the penetration length of stake and existence thereof and the LCD display 406 of the data that obtained by computing machine plate 405 with the output of oscillogram form.
Damage-free measuring apparatus 100 comprises the program of being carried out by computing machine, the operation panel of the data that logging program and storage are obtained by non-destructive measuring method, and can the fetch program and the recording medium of the data that obtain.
As shown in Figure 5, utilize the penetration length of following definitely of non-destructive measuring method of the present invention and the process of existence thereof to implement by adopting damage-free measuring apparatus 100, this device comprises: have foil gauge 203 and be used to apply the hammer 200 that impacts and measure for the impulsive force signal that is applied, reception is by the receiver 300 of the horizontal resiliency ripple signal of hammer 200 generations, with receive the impulsive force signal that measures by foil gauge 203 and from the horizontal resiliency ripple signal of receiver 300, and to its analyzer 400 of determining and analyzing.Said process comprises: form to insert the excavation step S1 of space segment so that with the underground stake to be measured preset distance place that is separated by, insert with the degree of depth that surpasses underground stake top and to have the cylindrical tube 700 of hollow space; Cylindrical tube 700 is put into the cylindrical tube inserting step S2 that inserts the space; The receiver 300 that can receive the horizontal resiliency ripple is put into the receiver inserting step S3 of cylindrical tube; Knock a hammer of top buildings side with hammer 200 and knock step S4; And measure and analyze with hammer 200 and knock the impulsive force signal of sides generation of buildings and the analytical procedure S5 of horizontal resiliency ripple.
More particularly, except forming the excavation step S1 that inserts space segment, cylindrical tube is put into the step S2 that inserts space segment, receiver is put into the step S3 of cylindrical tube, knock the step S4 and measurement and analysis of buildings of pounding with a hammer knocked outside the step S5 of the impulsive force signal of generation and horizontal resiliency ripple signal by hammer, sequentially promote the receiver 300 of putting into cylindrical tube 700 with preset space length S31 and S32, in the predetermined space that sequentially promotes receiver 300, sequentially knock the side S41 of buildings with hammer 200, in the predetermined space that promotes receiver, the impulsive force signal that side produced and the analyzed device 400 of horizontal resiliency ripple that are knocked buildings by hammer sequentially receive, and analyze and measure.
At this, cylindrical tube 700 can be steel pipe, aluminum pipe or pvc pipe, preferably pvc pipe.
In another embodiment of the present invention, this process comprises: for the top that may have regional buildings in stake produces the horizontal resiliency ripple, utilize hammer to apply the operation commencing signal input step (a) that power produces the input operation commencing signal on the buildings top by the user; In step (a), the superstructure that may imbed stake is produced the input of horizontal resiliency ripple, and the horizontal resiliency ripple receiving step (b) that receives the horizontal resiliency ripple by receiver; And by be combined in step (a) and (b) in the horizontal resiliency ripple that receives, the penetration length and the existence thereof of record stake are stored in data storage cell with the damage of stake, and the image output step display (c) that shows these results by the image output unit.
Hereinafter, will the non-destructive measuring method that adopt the damage-free measuring apparatus of being made up of hammer, receiver and analyzer be described in detail.
As shown in Figure 6, at first will be placed on by the damage-free measuring apparatus 100 that hammer 200, receiver 300 and analyzer 400 are formed to be measured underground 800 near.Then, forming the insertion space segment of the darker cylindrical tube 700 that can hold to have hollow space in the top of a more underground stake 800 at a distance of the place of preset distance with underground stake 800 to be measured, and cylindrical tube 700 put into the insertion space segment, the receiver 300 that can receive horizontal resiliency ripple 201 is put into the bottom of cylindrical tube 700.
The order of said process is whole can be changed.
That is to say, can after the insertion space segment of cylindrical tube 700 is held in formation, place damage-free measuring apparatus 100 again.
After finishing said process, if knock the side of buildings 801 with hammer 200, the horizontal resiliency ripple 802 of Chan Shenging is sent to the stake 800 that is embedded in buildings 801 bottoms so, and meanwhile, receiver 300 receives horizontal resiliency ripple 802 and sends it to analyzer 400.In addition, knock the side of buildings 801 by hammer 200 and the impulsive force signal that produces also is sent in the analyzer 400.
The signal that is sent to analyzer 400 by the said process step is shown with the form of waveform, and can be by the penetration length and the existence thereof of wave test stake.
Embodiment 1
As shown in Figure 6, suppose that the penetration length of stake is 4.5 meters, the degree of depth of holding the cylindrical tube insertion of receiver reaches 5.5 meters, and receiver is positioned over the bottom of cylindrical tube, then, and the side of the buildings that pounds with a hammer.Because the penetration length of stake is 4.5 meters, therefore, just can not produce the horizontal resiliency ripple that transmits along stake downwards at 5.5 meters, just can not detect signal yet.
Arrive 5 meters for 0.5 meter even promote receiver, at this moment pound with a hammer,, therefore, also can not detect signal because the penetration length of stake is 4.5 meters.
When promoting receiver with predetermined space, buildings is applied impact, receiver is sensed the horizontal resiliency ripple at the section that has stake, and because the existence of the medium damping of stake, therefore, there is distortion in the horizontal resiliency phase of wave comparison level waveform of experiencing.The existence of the waveform of distortion shows the existence of stake.
Because the passing time of horizontal resiliency ripple depends on the length of stake, therefore, deformation wave becomes oblique line to show along time shaft.In other words, the time lengthening of receiver sensation level elastic wave.
In oscillogram shown in Figure 6, P1 is the part of stake beginning, and P4 is the part that stake finishes.In the zone that stake exists, there is jump in the waveform shown in the figure.Become the penetration length of stake along the length of the drawn oblique line of deformation wave.
Embodiment 2
As shown in Figure 7, detect the penetration length of stake by above-mentioned non-destructive measuring method and when existing, when there was fracture in the center section of stake, the penetration length such as the oscillogram of stake showed.
The stake of as shown in the figure buildings bottom with there are differences from the medium of the medium between another part stake of this fracture with stake, therefore, the horizontal resiliency ripple can not be propagated by the medium of fracture, the penetration length and an existence thereof that also just can not detect.
Although illustrate and illustrated exemplary embodiment, a large amount of improvement, change and displacement in foregoing disclose, have been expected.In some instances, can adopt the Partial Feature among the embodiment, and not adopt other relevant features.Accordingly, claims are construed as the wideest scope in the disclosed category of embodiment.
Even when having buildings at the top of underground stake, also can determine the penetration length and the existence thereof of stake according to the non-destructive measuring method that descends pile penetration length and existence thereof definitely of the present invention and the damage-free measuring apparatus of implementing the method, and because main body is made up of steel fully, therefore, thus the emission level elastic wave realizes the penetration length of stake and determining of existence thereof for very dark zone at a distance.In addition, measure the impulsive force that produces elastic wave owing to adopt complete direction-free foil gauge, therefore, even side or surface to the buildings on the horizontal ends of underground stake or stake top apply impact, use penetration length and existence thereof that the cannot-harm-detection device of the present invention also can following definitely.
Claims (7)
1. use damage-free measuring apparatus and determine and analyze the penetration length of underground stake and the non-destructive measuring method of existence thereof for one kind, wherein, described damage-free measuring apparatus comprises the hammer that applies impact and have the sensor of the impulsive force of measuring the impact that applies, reception is by the receiver of the horizontal resiliency ripple that impact produced of hammer, carry out the analyzer of Measurement and analysis with the detected because horizontal resiliency ripple that impulsive force signal that hammering blow produced and receiver receive of receiving sensor and to it, described method comprises:
Form to insert the excavation step of space segment, so that forming the cylindrical tube of holding that the degree of depth surpasses underground stake top with hollow space with the tested underground stake preset distance place that is separated by;
Cylindrical tube is put into the cylindrical tube inserting step of inserting space segment;
The receiver that can receive the horizontal resiliency ripple is put into the receiver inserting step of cylindrical tube;
A hammer of top buildings side that pounds with a hammer knocks step; And
Measure and analyze the impulsive force signal that the side of the buildings that pounds with a hammer produces and the analytical procedure of horizontal resiliency ripple.
2. the method for claim 1, wherein form the excavation step of inserting space segment, cylindrical tube is put into the cylindrical tube inserting step of inserting space segment, receiver is put into the receiver inserting step of cylindrical tube, and measure and analyze because hammer knocks the analytical procedure of the impulsive force signal of generation, also comprise:
When promoting when putting into the receiver of cylindrical tube of order with preset space length, the step of in the preset space length that the receiver order promotes, sequentially knocking the side of buildings,
Meanwhile analyzer sequentially receives and analyzes and measure impulsive force signal and the horizontal resiliency ripple that is knocked the side generation of buildings by hammer.
3. the hammer of a damage-free measuring apparatus comprises:
Main body;
The handle that is connected with main body; And
Be installed in the sensor of measuring the impulsive force of the impact that applies in the main body;
Wherein, main body is made of steel fully and has the embedded space part of holding sensor in the one side;
The inside surface of described embedded space part has screw thread and engagement bolt, by the engages fixed embedded sensor of screw thread with the engagement bolt, thereby utilizes full rigid body to be easy to produce elastic wave, and is convenient to change when sensor damages.
4. hammer as claimed in claim 3; wherein sensor is to have good resistance impact durability and complete direction-free foil gauge; foil gauge is embedded in the embedded space part of main body; and by the screw thread of embedded space part inside surface and engagement bolt, installation; preferably; in order to protect it to avoid impacting, it is adorned and is installed in the opposite side that impacts part with the epoxy film plastic packaging.
5. determine and analyze the penetration length of underground stake and the non-destructive measuring method of existence thereof for one kind, comprising:
Operation commencing signal input step (a):, utilize hammer to apply power on the buildings top by the user and produce the input operation commencing signal for the top that may have regional buildings in stake produces the horizontal resiliency ripple;
Horizontal resiliency ripple receiving step (b): in step (a), the superstructure that may imbed stake is produced the input of horizontal resiliency ripple, and receive the horizontal resiliency ripple by receiver; And
Image output step display (c): be combined in step (a) and (b) in the horizontal resiliency ripple that receives, the penetration length and the existence thereof of record are stored in data storage cell with the damage result of stake, and show these results by the image output unit.
6. method as claimed in claim 5, wherein damage-free measuring apparatus comprises: the program of the non-destructive measuring method of being carried out by computing machine; Logging program also is stored in the operation panel of the data that obtain in the non-destructive measuring method; And can logging program and the recording medium of the data that obtain.
7. a damage-free measuring apparatus comprises: the program of enforcement of rights requirement 1 or 2 described non-destructive measuring methods; Logging program also is stored in the operation panel of the data that obtain in the non-destructive measuring method; And can the fetch program and the recording medium of the data that obtain.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040036078A KR100655479B1 (en) | 2004-05-20 | 2004-05-20 | The non-destruction test method for the measure pipe length with underground and the existence or nonexistence of pipe, and the hammer impactor of the non-destruction tester |
| KR0036078/2004 | 2004-05-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1700042A true CN1700042A (en) | 2005-11-23 |
| CN1323300C CN1323300C (en) | 2007-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100766337A Expired - Fee Related CN1323300C (en) | 2004-05-20 | 2004-08-13 | Harmless measuring method and device for analyzing and determining underground pile penetration length |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100655479B1 (en) |
| CN (1) | CN1323300C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442011C (en) * | 2006-02-08 | 2008-12-10 | 交通部公路科学研究院 | Apparatus and method for measuring burial depth of guard rail steel pipe post by employing elastic wave |
| CN100519959C (en) * | 2006-03-10 | 2009-07-29 | 南京大学 | Method for detecting reinforcing bar cage length of concrete pouring pile by electric logging method |
| CN102147301A (en) * | 2010-12-28 | 2011-08-10 | 湖南大学 | Nondestructive testing method of hard alloy anvil |
| CN107869155A (en) * | 2016-08-09 | 2018-04-03 | 侯宏伟 | Parallel seismic wave method determines the detection means and its detection method of foundation pile length |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102184988B1 (en) * | 2020-10-14 | 2020-12-01 | 한국건설기술연구원 | Measuring Apparatus and Measuring Method of Embedment Depth of Embedded Anchor Using Ultrasonic Wave |
| CN117723637B (en) * | 2024-02-09 | 2024-04-19 | 同济大学 | Tunnel contact type detection system and periodic shock wave excitation device thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100439334B1 (en) * | 2002-03-06 | 2004-07-12 | 미승씨엔에스검사주식회사 | Transmission and receiving module of ultrasonic test system for cast-in-place concrete pile |
-
2004
- 2004-05-20 KR KR1020040036078A patent/KR100655479B1/en active IP Right Grant
- 2004-08-13 CN CNB2004100766337A patent/CN1323300C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442011C (en) * | 2006-02-08 | 2008-12-10 | 交通部公路科学研究院 | Apparatus and method for measuring burial depth of guard rail steel pipe post by employing elastic wave |
| CN100519959C (en) * | 2006-03-10 | 2009-07-29 | 南京大学 | Method for detecting reinforcing bar cage length of concrete pouring pile by electric logging method |
| CN102147301A (en) * | 2010-12-28 | 2011-08-10 | 湖南大学 | Nondestructive testing method of hard alloy anvil |
| CN107869155A (en) * | 2016-08-09 | 2018-04-03 | 侯宏伟 | Parallel seismic wave method determines the detection means and its detection method of foundation pile length |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1323300C (en) | 2007-06-27 |
| KR100655479B1 (en) | 2006-12-14 |
| KR20040052962A (en) | 2004-06-23 |
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