CN114111592A - Anchor head displacement measuring device for anchor rod drawing test - Google Patents
Anchor head displacement measuring device for anchor rod drawing test Download PDFInfo
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- CN114111592A CN114111592A CN202111388489.0A CN202111388489A CN114111592A CN 114111592 A CN114111592 A CN 114111592A CN 202111388489 A CN202111388489 A CN 202111388489A CN 114111592 A CN114111592 A CN 114111592A
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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
- G01N3/02—Details
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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
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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Abstract
The invention relates to the technical field of anchor rod drawing test detection in the field of engineering construction, and discloses an anchor head displacement measuring device for an anchor rod drawing test, wherein a measuring ring comprises: the device comprises a ring body, a laser ranging sensor, a transmitting and receiving head, an interface and a sensor connecting line; the spacing ring includes: a hoop and a locking bolt; the reference beam includes: the device comprises a beam body, a reference plate, a reflecting prism and a stud hole; the reference pile includes: the invention is based on the laser ranging principle, and measures the distance between a measuring ring fixed at the upper end of the tested anchor rod and a reference disc erected at the periphery of the tested anchor rod through a plurality of laser ranging sensors uniformly distributed at the periphery of the tested anchor rod, thereby obtaining the real displacement of an anchor head in the anchor rod drawing test.
Description
Technical Field
The invention relates to the technical field of anchor rod drawing test detection in the field of engineering construction, in particular to an anchor head displacement measuring device for an anchor rod drawing test.
Background
The anchor rod drawing test is the most intuitive and reliable traditional method for detecting the uplift bearing capacity of the anchor rod, the principle is that the anchor rod head is loaded to the load close to or slightly higher than the actual working condition of the anchor rod step by step, the corresponding uplift bearing capacity of the anchor rod is determined by observing the uplift amount of the anchor head along with the change of the load and the time, and a basis is provided for the design and engineering acceptance of the anchor rod.
As is well known, in the anchor rod drawing test, the anchor head displacement of the anchor rod is an important parameter for evaluating whether the bearing capacity of the anchor rod is qualified, so that the anchor head displacement measurement work of the anchor rod is also an important work in the anchor rod drawing test. The known anchor rod drawing test anchor head displacement measuring device at present mainly comprises a reference pile, a reference beam, a dial indicator (or a displacement meter) and the like: the reference pile is arranged outside the specified distance of the periphery of the tested anchor rod, the reference beam is erected on the reference pile, then the dial indicator (or displacement meter) is arranged on the reference beam by using the magnetometer stand, and the dial indicator (or displacement meter) head measuring frame is arranged at the top end of the anchor rod extension section or on the clamp. Such anchor head displacement measuring devices may affect the accuracy of the measurement results in the following respects: 1) when the dial indicator (or displacement meter) head measuring frame is arranged at the top end of the anchor rod extension section, the anchor rod is stressed unevenly at the clamp piece of the clamp or is easy to bend under the influence of gravity, so that the measuring result has errors; 2) when the dial indicator (or displacement meter) head is arranged on the clamp, the anchor rod is easy to slip at the clamp clamping piece after being stressed, and the measured displacement is not the true displacement of the anchor rod; 3) the dial indicator (or the displacement meter) is fixed by a magnetic indicator seat, and the dial indicator (or the displacement meter) is easy to topple due to contact pressure between the dial indicator (or the displacement meter) and a measuring position or under the influence of wind load, so that the authenticity of a measuring result is influenced or the test has to be carried out again; 4) in addition, because the displacement of the tested anchor rod body is usually large, the manual meter adjustment has to be carried out after the measuring range of the dial indicator (or displacement meter) is exceeded, and further, the manual intervention error is generated. The problem can increase the stock undoubtedly and draw experimental anchor head displacement measurement's the degree of difficulty, reduces work efficiency and testing result's accuracy.
Therefore, it is necessary to develop an anchor head displacement measuring device for an anchor rod drawing test, which not only can improve the test accuracy, but also can greatly improve the test efficiency, and provide guarantee for engineering quality safety.
Disclosure of Invention
The invention aims to provide an anchor head displacement measuring device for an anchor rod drawing test, and aims to solve the problems that in the prior art, the difficulty of anchor head displacement measurement of the anchor rod drawing test is complex, the working efficiency is low, and the detection result is inaccurate.
The invention is realized in such a way, and in order to realize the purpose, the invention provides the following technical scheme: the measuring device comprises a measuring ring, a limiting ring sleeved at the lower end of the measuring ring, a reference beam transversely connected with the tested anchor rod in a penetrating manner, reference piles fixedly installed at the lower ends of two sides of the reference beam, a connecting cable connected with the measuring ring, a computer connected with the other end of the connecting cable and a correcting mechanism sleeved on the outer surface of the reference beam;
the straightening mechanism comprises a lantern ring and a mounting plate fixedly mounted on two sides of the lantern ring, a bolt penetrates through the upper end thread of the mounting plate, an ultrasonic transceiver is fixedly mounted on the upper end of the lantern ring, a rotating shaft is arranged at the middle part of the ultrasonic transceiver, an ultrasonic transmitting head is fixedly mounted on the outer end of the ultrasonic transceiver, the tail end of the ultrasonic transmitting head is fixedly connected with the rotating shaft, and the transmitting direction of the output end of the ultrasonic transmitting head is aligned with the measuring ring.
Further, the measuring ring comprises a ring body, a laser ranging sensor embedded in the surface of the ring body, a transmitting and receiving head arranged at the bottom end of the laser ranging sensor, an interface arranged on one side of the ring body, a sensor connecting wire connected with the interface and a blocking plate hinged to the lower end of the ring body.
Furthermore, the laser ranging sensors are symmetrically and uniformly distributed in the ring body, the laser ranging sensors are connected in series through the sensor connecting wires, finally the sensor connecting wires are led out to the interface, the interface is connected with the computer through the connecting cable, the computer controls the laser ranging sensors to carry out acquisition and measurement through the connecting cable, and acquired data are transmitted into the computer through the connecting cable.
Furthermore, the spacing ring comprises a hoop sleeved on the outer surface of the detected anchor rod and a locking bolt arranged at the upper end of the hoop.
Furthermore, the locking bolts are symmetrically and uniformly distributed on the hoop, and can retract inwards when being screwed and are clamped on the anchor rod to be detected.
Furthermore, the reference beam comprises a beam body, a reference plate fixedly arranged on one side of the beam body, a reflecting prism fixedly arranged at the upper end of the reference plate and stud holes distributed on the outer side of the beam body.
Furthermore, the two beam bodies are symmetrically fixed on two sides of the reference plate, so that central axes of the two beam bodies are superposed and pass through the center of the reference plate, the surface of the reference plate is parallel to the central axes of the two beam bodies, the reflecting prisms are uniformly and symmetrically fixed on the reference plate, the reflecting prisms correspond to the transmitting and receiving heads of the laser ranging sensor one by one, and the reflecting prisms are coaxial with the transmitting and receiving heads of the laser ranging sensor.
Further, the reference pile comprises a pile body, a stud fixedly installed at the upper end of the pile body and a nut in threaded sleeve connection with the upper end of the stud.
Furthermore, two pile bodies are symmetrically and stably arranged in soil layers on two sides of the detected anchor rod, the central axes of the two pile bodies are parallel to the central axis of the detected anchor rod, the connecting line of the top ends of the two pile bodies is perpendicular to the central axis of the detected anchor rod, and the distance between the central axes of the two pile bodies and the central axis of the detected anchor rod meets the requirements of relevant specifications.
Furthermore, the extension section of the detected anchor rod penetrates through the center of the reference plate, two ends of the reference beam are erected on the two pile bodies, the stud penetrates through the stud hole in the reference beam, and the mirror surface of the reflecting prism on the reference plate faces upwards and faces the transmitting and receiving head of the laser ranging sensor.
Furthermore, an insertion hole is formed in the soil body, the pile body is provided with an insertion section inserted into the soil body, the bottom of the insertion section is provided with a chassis which is horizontally arranged, the insertion section is fixedly sleeved with a plurality of ring disks, and the plurality of ring disks are distributed at equal intervals along the axial direction of the insertion section; the base plate abuts against the bottom of the insertion hole, the periphery of the base plate abuts against the inner side wall of the insertion hole, and the periphery of the ring disc abuts against the inner side wall of the insertion hole;
the periphery of ring dish is equipped with single breach, and the breach of a plurality of ring dishes is arranged along the circumference equidistance of inserted section, fill slurry in the inserted hole, whole patchhole is filled to slurry, form middle thick liquid block after the slurry solidifies, middle thick liquid block is with a plurality of ring dish cladding, and support down and press the chassis to the inside wall of patchhole is supported towards the side direction.
Furthermore, a plurality of supports are arranged in the soil body, a plurality of support grooves are uniformly surrounded on the periphery of the insertion hole, the support grooves are in a right trapezoid shape, the inner sides of the support grooves penetrate through the inner side walls of the insertion hole, the outer sides of the support grooves incline outwards along the direction from top to bottom of the insertion hole to form an inclined shape, the tops of the support grooves penetrate through the ground, and the bottoms of the support grooves are flush with the bottom of the insertion hole and are arranged horizontally;
the number of the supporting grooves is consistent with that of the ring discs, and the supporting grooves are respectively arranged in alignment with the notches of the ring discs correspondingly; the supporting ditch is filled with slurry, after the slurry is solidified, a supporting slurry wall which is integrally formed with the middle slurry block is formed, and the supporting slurry wall is vertically arranged;
the periphery on chassis extends outward has a plurality of upward bends, and is a plurality of upward bends arrange, and a plurality of upward bends shape unanimous, and is a plurality of upward bends correspond respectively and imbed in a plurality of supporting grooves from bottom to top, upward bends are by the cladding in supporting the thick liquid wall.
Further, the top cover of inserting the section is equipped with a top dish, top dish top-down supports presses subaerial, the periphery of top dish extends outward and has a plurality of lower curved strips, and is a plurality of the lower curved strip is crooked arranging down, and a plurality of lower curved strip is crooked shape unanimous down, and is a plurality of the lower curved strip corresponds the top-down embedding respectively in a plurality of supporting ditches, the lower curved strip is wrapped in supporting the thick liquid wall.
Compared with the prior art, the invention has the beneficial effects that:
1. the anchor head displacement measuring device for the anchor rod drawing test is based on the laser ranging principle, and measures the distance between the measuring ring fixed at the upper end of the tested anchor rod and the reference disc erected on the periphery of the tested anchor rod through the plurality of laser ranging sensors uniformly distributed on the periphery of the tested anchor rod, so that the real displacement of the anchor head in the anchor rod drawing test is obtained.
2. The invention provides an anchor head displacement measuring device for an anchor rod drawing test, wherein a bolt penetrates through the upper end thread of a mounting plate, an ultrasonic transceiver is fixedly arranged at the upper end of a sleeve ring, a rotating shaft is arranged at the middle part of the ultrasonic transceiver, an angle sensor is arranged at one side of the rotating shaft, an ultrasonic transmitting head is fixedly arranged at the outer end of the ultrasonic transceiver, the tail end of the ultrasonic transmitting head is fixedly connected with the rotating shaft, the transmitting direction of the output end of the ultrasonic transmitting head is aligned with a measuring ring, the ultrasonic transceiver is started to work, so that the ultrasonic transmitting head transmits ultrasonic waves and can be converted into electric signals for monitoring whether the front end of the ultrasonic transmitting head is obstructed or not, the obtained data is transmitted to a computer, the angle of the ultrasonic transmitting head is adjusted by using the rotating shaft to enable the ultrasonic transmitting head to be parallel to the ground, the signals are transmitted to the direction of a tested anchor rod, and the distance between the ultrasonic transmitting head and the tested anchor rod can be obtained, when the obtained minimum numerical value is a vertical line, if the angle adjusted by the rotating shaft is vertical to the ultrasonic transceiver, the tested anchor rod is vertical to the ground, and the measuring accuracy is convenient to ensure.
3. According to the anchor head displacement measuring device for the anchor rod drawing test, before the test is started, stress elements such as a jack, an anchor clamp and a counter-force base plate are assembled; then, erecting a reference pile and a reference beam according to the connection mode, and enabling stress elements such as a jack, an anchorage device clamp and the like not to touch a reference disc in the test process; then, sleeving a measuring ring on the extension section of the tested anchor rod, and fixing the measuring ring at a position above the reference disc, which is convenient for measurement, by using a limiting ring; and finally, connecting an interface on the measuring ring with a computer through a connecting cable, after the test is started, under each level of load, sending an acquisition instruction by the computer according to a measuring time interval required by a relevant specification, transmitting the acquisition instruction to the laser ranging sensor through the connecting cable, transmitting laser to the reflecting prism through the transmitting and receiving head of the laser ranging sensor by the laser ranging sensor, reflecting the laser back to the transmitting and receiving head of the laser ranging sensor by the reflecting prism, calculating the measuring distance through the laser ranging sensor, and transmitting the measuring distance to the computer through the connecting cable, wherein the difference between the average distance measurements of all the laser ranging sensors at two adjacent times is the displacement of the anchor head.
Drawings
FIG. 1 is a schematic view of an anchor head displacement measuring device for an anchor rod drawing test according to the invention;
FIG. 2 is a top view of a measurement ring of the present invention;
FIG. 3 is a side view of a measurement ring of the present invention;
FIG. 4 is a top view of the stop collar of the present invention;
FIG. 5 is a side view of the stop collar of the present invention;
FIG. 6 is a top view of a reference beam according to the present invention;
FIG. 7 is a side view of a reference beam of the present invention;
FIG. 8 is a top view of a reference pile according to the present invention;
FIG. 9 is a side view of a reference pile of the present invention;
FIG. 10 is a schematic view of the orthosis mechanism of the present invention;
FIG. 11 is a schematic view showing a structure in which an insertion section is inserted into an insertion hole according to the present invention;
FIG. 12 is a schematic view of the structure of the ring plate of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-12, there are provided preferred embodiments of the present invention:
a anchor head displacement measurement device for anchor rod is drawn experimental, measuring device include measure ring 1, cup joint at the spacing ring 2 of measuring ring 1 lower extreme, with the horizontal through connection's of examined anchor rod 8 benchmark roof beam 3, fixed mounting is at benchmark stake 4 of 3 both sides lower extremes of benchmark roof beam, with the connecting cable 5 of measuring ring 1 connection, with the computer 6 of connecting cable 5 other end connection and cup joint at the aligning gear 7 of 3 surfaces of benchmark roof beam.
The correcting mechanism 7 comprises a lantern ring 71 and mounting plates 72 fixedly mounted on two sides of the lantern ring 71, a bolt 73 penetrates through the upper end thread of each mounting plate 72, an ultrasonic transceiver 74 is fixedly mounted on the upper end of the lantern ring 71, a rotating shaft 75 is arranged in the middle of each ultrasonic transceiver 74, an angle sensor is mounted on one side of each rotating shaft 75, an ultrasonic emitter 76 is fixedly mounted on the outer end of each ultrasonic transceiver 74, the tail end of each ultrasonic emitter 76 is fixedly connected with the corresponding rotating shaft 75, the emitting direction of the output end of each ultrasonic emitter 76 is aligned with the corresponding measuring ring 1, the ultrasonic transceivers 74 are started to work, so that the ultrasonic emitters 76 emit ultrasonic waves and can be converted into electric signals for monitoring whether the front end of each ultrasonic emitter 76 is obstructed or not, the obtained data are transmitted to the computer 6, the rotating shafts 75 are used for adjusting the angle of each ultrasonic emitter 76 to enable the ultrasonic emitters to be parallel to the ground, and the signal is transmitted to the direction of the tested anchor rod 8, the distance between the ultrasonic transmitting head 76 and the tested anchor rod 8 can be obtained, when the obtained minimum numerical value is a vertical line, if the angle adjusted by the rotating shaft 75 is vertical to the ultrasonic transceiver 74 at the moment, the tested anchor rod 8 is vertical to the ground, and the accuracy of measurement is convenient to ensure.
The measuring ring 1 comprises a ring body 11, a laser ranging sensor 12 embedded in the surface of the ring body 11, a transmitting and receiving head 13 arranged at the bottom end of the laser ranging sensor 12, an interface 14 arranged on one side of the ring body 11, a sensor connecting wire 15 connected with the interface 14 and a blocking plate 16 hinged to the lower end of the ring body 11, wherein the angle of the blocking plate 16 is adjustable, when the blocking plate is positioned at the lower end of the transmitting and receiving head 13, laser transmitted by the transmitting and receiving head 13 is absorbed, and the situation that the accuracy of data is influenced due to the fact that parts move after detection is completed is prevented.
The laser ranging sensors 12 are symmetrically and uniformly distributed in the ring body 11, the laser ranging sensors 12 are connected in series through sensor connecting wires 15, finally the sensor connecting wires 15 are led out to the interface 14, the interface 14 is connected with the computer 6 through the connecting cable 5, the computer 6 controls the laser ranging sensors 12 to carry out acquisition and measurement through the connecting cable 5, and acquired data are transmitted into the computer 6 through the connecting cable 5.
The spacing ring 2 comprises a hoop 21 sleeved on the outer surface of the tested anchor rod 8 and a locking bolt 22 arranged at the upper end of the hoop 21.
The locking bolts 22 are symmetrically and uniformly distributed on the hoop 21, and the locking bolts 22 can retract inwards when being screwed down and are clamped on the tested anchor rod 8.
The reference beam 3 comprises a beam body 31, a reference plate 32 fixedly arranged on one side of the beam body 31, a reflecting prism 33 fixedly arranged on the upper end of the reference plate 32 and stud holes 34 distributed on the outer side of the beam body 31.
The two beam bodies 31 are symmetrically fixed on two sides of the reference disc 32, so that the central axes of the two beam bodies 31 are superposed and pass through the center of the reference disc 32, the disc surface of the reference disc 32 is parallel to the central axes of the two beam bodies 31, the reflecting prisms 33 are uniformly and symmetrically fixed on the reference disc 32, the reflecting prisms 33 correspond to the transmitting and receiving heads 13 of the laser ranging sensor 12 one by one, and the reflecting prisms 33 are coaxial with the transmitting and receiving heads 13 of the laser ranging sensor 12.
The reference pile 4 includes a pile body 41, a stud 42 fixedly installed at an upper end of the pile body 41, and a nut 43 threadedly engaged with an upper end of the stud 42.
The two pile bodies 41 are symmetrically and stably arranged in soil layers on two sides of the tested anchor rod 8, the central axes of the two pile bodies 41 are parallel to the central axis of the tested anchor rod 8, the connecting line of the top ends of the two pile bodies 41 is perpendicular to the central axis of the tested anchor rod 8, and the distance between the central axes of the two pile bodies 41 and the central axis of the tested anchor rod 8 meets the requirements of relevant specifications.
The extension section of the tested anchor rod 8 passes through the center of the reference plate 32, the two ends of the reference beam 3 are erected on two pile bodies 41, the stud 42 passes through the stud hole 34 on the reference beam 3, and the reflecting prism 33 on the reference plate 32 faces upwards and is right opposite to the transmitting and receiving head 13 of the laser ranging sensor 12.
Specifically, the elongation of the tested anchor rod 8 passes through the center of the reference plate 32, the two ends of the reference beam 3 are erected on the two pile bodies 41, the stud 42 passes through the stud hole 34 on the reference beam 3, the reference beam 3 is locked by the nut 43, and the reflecting prism 33 on the reference plate 32 faces upwards and faces the transmitting and receiving head 13 of the laser ranging sensor 12.
Before the test is started, stress elements such as a jack 9, an anchorage device clamp, a counter-force base plate 10 and the like are assembled; then, erecting a reference pile 4 and a reference beam 3 respectively according to the connection mode, and enabling stress elements such as a jack 9, an anchorage device clamp and the like not to touch a reference disc 32 in the test process; then, the measuring ring 1 is sleeved on the elongation section of the tested anchor rod 8, and the measuring ring 1 is fixed at a position above the reference disc 32, which is convenient to measure, by using the limiting ring 2 (the length and the rigidity of the elongation section of the anchor rod can be adjusted); finally, the interface 14 on the measuring ring 1 is connected to the computer 6 by means of the connecting cable 5.
After the test is started, under each level of load, the computer 6 sends a collecting instruction according to the measuring time interval required by the relevant specification, the collecting instruction is transmitted to the laser ranging sensor 12 through the connecting cable 5, the laser ranging sensor 12 transmits laser to the reflecting prism 33 through the transmitting and receiving head 13, the reflecting prism 33 reflects the laser back to the transmitting and receiving head 13 of the laser ranging sensor 12, the measuring distance is obtained after the calculation of the laser ranging sensor 12, the measuring distance is transmitted to the computer 6 through the connecting cable 5, and the difference between the average distance measurements of all the laser ranging sensors 12 in two adjacent times is the anchor head displacement.
The measurement accuracy of the laser distance measuring sensor 12 reaches more than 1 mm.
The measuring ring 1, the limiting ring 2, the reference beam 3 and the reference pile 4 are made of light materials with the advantages of high rigidity, high hardness, high temperature resistance and the like.
In summary, the following steps: the anchor head displacement measuring device for the anchor rod drawing test is based on the laser ranging principle, and measures the distance between the measuring ring fixed at the upper end of the tested anchor rod 8 and the reference disc 32 erected on the periphery of the tested anchor rod 8 through the plurality of laser ranging sensors 12 uniformly distributed on the periphery of the tested anchor rod 8, so that the real displacement of the anchor head in the anchor rod drawing test is obtained.
Referring to fig. 11-12, an insertion hole 94 is formed in the soil body, the pile body 41 has an insertion section inserted into the soil body, a bottom of the insertion section is provided with a horizontally arranged bottom plate 92, the insertion section is fixedly sleeved with a plurality of ring plates 95, and the plurality of ring plates 95 are distributed at equal intervals along the axial direction of the insertion section; the bottom plate 92 abuts against the bottom of the insertion hole 94, the outer periphery of the bottom plate 92 abuts against the inner side wall of the insertion hole 94, and the outer periphery of the annular plate 95 abuts against the inner side wall of the insertion hole 94; the periphery of the ring plate 95 is provided with a single notch 951, the notches 951 of the plurality of ring plates 95 are arranged at equal intervals along the circumferential direction of the insertion section, the insertion holes 94 are filled with slurry, the slurry fills the whole insertion holes 94, a middle slurry block is formed after the slurry is solidified, the middle slurry block coats the plurality of ring plates 95, and is pressed against the bottom plate 92 downwards and is pressed against the inner side wall of the insertion holes 94 laterally.
In order to ensure that the pile body 41 is inserted into the soil body and keeps a vertical state to ensure the accuracy of a subsequent test, a plurality of ring disks 95 are sleeved on the insertion section, so that the insertion hole 94 is divided into a plurality of spaces which are communicated up and down, the gaps 951 of the ring disks 95 are utilized to be communicated up and down, after the insertion hole 94 is filled with slurry, the slurry also fills all the spaces, and the middle slurry block also coats the ring disks 95, so that the middle slurry block coats the ring disks 95 into a whole, and the inside of the middle slurry block is also divided by the ring disks 95, so that the insertion section is stably arranged in the insertion hole 94, and the whole insertion section cannot be inclined and fluctuated due to the local fluctuation or loose soil body in the middle.
Second, the annular disks 95 are provided with notches 951 which allow the divided portions of the intermediate slurry blocks to be connected through the notches 951, but not integrally connected, thereby preventing local fluctuations between the annular disks 95 from affecting fluctuations throughout the insertion section.
In the actual grouting operation, the grouting pipe may be sequentially passed through the notches 951 of the plurality of ring disks 95 from top to bottom, the insertion section is inserted into the insertion hole 94, grouting is performed step by step, and the grouting pipe is pulled out step by step upward.
The soil body is provided with a plurality of supporting grooves 91, the supporting grooves 91 are uniformly surrounded on the periphery of the insertion hole 94, the supporting grooves 91 are in a right-angled trapezoid shape, the inner sides of the supporting grooves 91 penetrate through the inner side wall of the insertion hole 94, the outer sides of the supporting grooves 91 are inclined outwards along the direction from top to bottom of the insertion hole 94 to form an inclined shape, the tops of the supporting grooves 91 penetrate through the ground, and the bottoms of the supporting grooves 91 are flush with the bottoms of the insertion hole 94 and are arranged horizontally; the number of the supporting grooves 91 is the same as that of the ring disks 95, and the supporting grooves 91 are respectively aligned with the notches 951 of the ring disks 95; the supporting groove 91 is filled with slurry, and after the slurry is solidified, a supporting slurry wall which is integrally formed with the middle slurry block is formed, and the supporting slurry wall is vertically arranged.
Thus, the supporting slurry walls play a role in supporting the middle slurry block circumferentially, the stability of the middle slurry block is further maintained, the stability of the inserting section is also ensured, and the vertical arrangement of the pile bodies 41 is ensured.
The periphery of chassis 92 outwards extends has a plurality of upward bends 921, and a plurality of upward bends 921 are crooked arranging up, and a plurality of upward bends 921 the shape unanimous up, and a plurality of upward bends 921 correspond respectively from bottom to top and imbed in a plurality of supporting ditch 91, and upward bends 921 is by the cladding in supporting the thick liquid wall.
The upward bent strip 921 of the bottom plate 92 is embedded in the supporting slurry wall, and the bottom plate 92 and the supporting slurry wall are formed into a whole, so that the supporting slurry wall not only forms circumferential support for the middle slurry block in the circumferential direction, but also forms support for the middle slurry block in the axial direction, and the fluctuation of the middle slurry block in the axial direction is avoided.
The top cover of inserting the section is equipped with a top plate 93, and top plate 93 top-down supports to press subaerial, and the periphery of top plate 93 extends outward has a plurality of lower curved bars 931, and a plurality of lower curved bars 931 are crooked arranging downwards, and a plurality of lower curved bars 931 are crooked shape unanimous downwards, and a plurality of lower curved bars 931 correspond the top-down embedding respectively in a plurality of supporting trench 91, and lower curved bars 931 are by the cladding in supporting the thick liquids wall.
The plurality of downward bent strips 931 of the top plate 93 are embedded in the supporting slurry wall, so that the top plate 93 and the supporting slurry wall are integrated, a state of vertically clamping the middle slurry block is formed between the top plate 93 and the bottom plate 92, the stability of the middle slurry block in the axial direction is ensured, and the supporting effect of the plurality of supporting slurry walls in the circumferential direction is matched, so that the position of the middle slurry block is stable, and the inserting section is stable.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The anchor head displacement measuring device for the anchor rod drawing test is characterized by comprising a measuring ring (1), a limiting ring (2) sleeved at the lower end of the measuring ring (1), a reference beam (3) transversely connected with a tested anchor rod (8) in a penetrating manner, reference piles (4) fixedly installed at the lower ends of two sides of the reference beam (3), a connecting cable (5) connected with the measuring ring (1), a computer (6) connected with the other end of the connecting cable (5) and a correcting mechanism (7) sleeved on the outer surface of the reference beam (3);
the measuring ring (1) comprises a ring body (11), a laser ranging sensor (12) embedded in the surface of the ring body (11), a transmitting and receiving head (13) arranged at the bottom end of the laser ranging sensor (12), an interface (14) arranged on one side of the ring body (11), a sensor connecting wire (15) connected with the interface (14) and a blocking plate (16) hinged to the lower end of the ring body (11);
the reference beam (3) comprises a beam body (31), a reference disc (32) fixedly arranged on one side of the beam body (31), a reflecting prism (33) fixedly arranged at the upper end of the reference disc (32) and stud holes (34) distributed on the outer side of the beam body (31);
the two beam bodies (31) are symmetrically fixed on two sides of the reference disc (32), so that the central axes of the two beam bodies (31) are superposed and pass through the center of the reference disc (32), the disc surface of the reference disc (32) is parallel to the central axes of the two beam bodies (31), the reflecting prisms (33) are uniformly and symmetrically fixed on the reference disc (32), the reflecting prisms (33) correspond to the transmitting and receiving heads (13) of the laser ranging sensor (12) one by one, and the reflecting prisms (33) are coaxial with the transmitting and receiving heads (13) of the laser ranging sensor (12);
the straightening mechanism (7) comprises a sleeve ring (71) and mounting plates (72) fixedly mounted on two sides of the sleeve ring (71), a bolt (73) penetrates through the upper end threads of the mounting plates (72), an ultrasonic transceiver (74) is fixedly mounted on the upper end of the sleeve ring (71), a rotating shaft (75) is arranged in the middle of the ultrasonic transceiver (74), an ultrasonic emitting head (76) is fixedly mounted on the outer end of the ultrasonic transceiver (74), the tail end of the ultrasonic emitting head (76) is fixedly connected with the rotating shaft (75), and the emitting direction of the output end of the ultrasonic emitting head (76) is aligned to the measuring ring (1).
2. The anchor head displacement measuring device for the anchor rod pull test according to claim 1, wherein: laser rangefinder sensor (12) are in symmetry evenly distributed in ring body (11), use between laser rangefinder sensor (12) sensor connecting wire (15) are established ties, and last sensor connecting wire (15) are drawn forth interface (14), interface (14) pass through connecting cable (5) with computer (6) are connected, computer (6) pass through connecting cable (5) control laser rangefinder sensor (12) gather the measurement to pass through the data of gathering connecting cable (5) reach in computer (6).
3. The anchor head displacement measuring device for the anchor rod pull test according to claim 2, wherein: the limiting ring (2) comprises a hoop (21) sleeved on the outer surface of the detected anchor rod (8) and a locking bolt (22) arranged at the upper end of the hoop (21).
4. The anchor head displacement measuring device for the anchor rod pull test according to claim 3, wherein: the locking bolts (22) are symmetrically and uniformly distributed on the hoop (21), and the locking bolts (22) can retract inwards when being screwed down and are clamped on the tested anchor rod (8).
5. The anchor head displacement measuring device for the anchor rod pull test according to claim 4, wherein: the reference pile (4) comprises a pile body (41), a stud (42) fixedly installed at the upper end of the pile body (41) and a nut (43) sleeved at the upper end of the stud (42) in a threaded manner.
6. The anchor head displacement measuring device for the anchor rod pull test according to claim 5, wherein: two pile body (41) symmetry is firmly beaten in the soil horizon of examined stock (8) both sides, and makes two the central axis of pile body (41) is parallel with the central axis of examined stock (8), and two the line on pile body (41) top is mutually perpendicular with the central axis of examined stock (8), the interval of two pile body (41) central axes and examined stock (8) central axis will satisfy relevant standard's requirement.
7. The anchor head displacement measuring device for the anchor rod pull test according to claim 6, wherein: an elongation section of the detected anchor rod (8) penetrates through the center of the reference plate (32), two ends of the reference beam (3) are erected on two pile bodies (41), the stud (42) penetrates through the stud hole (34) in the reference beam (3), and the reflecting prism (33) on the reference plate (32) faces upwards and is right opposite to the transmitting and receiving head (13) of the laser ranging sensor (12).
8. An anchor head displacement measuring device for a bolt pull test according to any one of claims 4 to 7, wherein: an insertion hole (94) is formed in the soil body, the pile body (41) is provided with an insertion section inserted into the soil body, the bottom of the insertion section is provided with a chassis (92) which is horizontally arranged, a plurality of ring disks (95) are fixedly sleeved on the insertion section, and the ring disks (95) are distributed at equal intervals along the axial direction of the insertion section; the bottom plate (92) abuts against the bottom of the insertion hole (94), the outer periphery of the bottom plate (92) abuts against the inner side wall of the insertion hole (94), and the outer periphery of the ring plate (95) abuts against the inner side wall of the insertion hole (94);
the periphery of ring dish (95) is equipped with single breach (951), and breach (951) of a plurality of ring dishes (95) are arranged along the circumference equidistance of inserted section, fill slurry in patchhole (94), whole patchhole (94) are filled to slurry, form middle thick liquid block after the slurry solidifies, middle thick liquid block is with a plurality of ring dishes (95) cladding, and support and press chassis (92) down to the inside wall of patchhole (94) is supported and pressed towards the side direction.
9. The anchor head displacement measuring device for the anchor rod pull test according to claim 8, wherein: the soil body is internally provided with a plurality of supporting grooves (91), the supporting grooves (91) uniformly surround the periphery of the insertion hole (94), the supporting grooves (91) are in a right-angle trapezoidal shape, the inner sides of the supporting grooves (91) penetrate through the inner side wall of the insertion hole (94), along the direction from top to bottom of the insertion hole (94), the outer sides of the supporting grooves (91) incline outwards and are inclined, the tops of the supporting grooves (91) penetrate through the ground, and the bottoms of the supporting grooves (91) are flush with the bottom of the insertion hole (94) and are horizontally arranged;
the number of the supporting grooves (91) is consistent with that of the ring discs (95), and the supporting grooves (91) are respectively aligned with the notches (951) of the ring discs (95); the supporting groove (91) is filled with slurry, after the slurry is solidified, a supporting slurry wall which is integrally formed with the middle slurry block is formed, and the supporting slurry wall is vertically arranged;
the periphery of chassis (92) extends outward and has a plurality of upward bending (921), and is a plurality of upward bending (921) is crooked to be arranged up, and a plurality of upward bending (921) the shape of bending up unanimous, and is a plurality of upward bending (921) corresponds embedding from bottom to top respectively in a plurality of supporting trench (91), upward bending (921) is by the cladding in supporting the thick liquids wall.
10. The anchor head displacement measuring device for the anchor rod pull test of claim 9, wherein: the top cover of inserting the section is equipped with a set (93), set (93) top-down supports to press subaerial, the periphery of set (93) outwards extends and has a plurality of lower curved strip (931), and is a plurality of curved strip (931) are crooked arranging down, and a plurality of curved strip (931) are curved shape unanimous down, and are a plurality of curved strip (931) are down corresponding top-down embedding respectively in a plurality of supporting trench (91) down, curved strip (931) are down wrapped in supporting the thick liquid wall.
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