CN114088775B - Elastic detection device and detection method for plumpness of anchor cable and rod in grouting stage - Google Patents
Elastic detection device and detection method for plumpness of anchor cable and rod in grouting stage Download PDFInfo
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- CN114088775B CN114088775B CN202111404382.0A CN202111404382A CN114088775B CN 114088775 B CN114088775 B CN 114088775B CN 202111404382 A CN202111404382 A CN 202111404382A CN 114088775 B CN114088775 B CN 114088775B
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- 238000001514 detection method Methods 0.000 title claims abstract description 58
- 239000000523 sample Substances 0.000 claims abstract description 41
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- 238000000034 method Methods 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000005553 drilling Methods 0.000 claims description 22
- 230000000712 assembly Effects 0.000 claims description 18
- 238000000429 assembly Methods 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 13
- 239000004973 liquid crystal related substance Substances 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 10
- 239000004570 mortar (masonry) Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000005345 coagulation Methods 0.000 abstract description 2
- 230000015271 coagulation Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
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Abstract
The invention discloses an elastic detection device and a detection method for plumpness in an anchor cable and rod grouting stage. The device comprises an elastic electrode module, a conductive mesh, a running sliding rope and a handheld detector; the elastic electrode module consists of a front electrode assembly and a rear electrode assembly which are the same and are connected through an interelectrode connecting rod, and each electrode assembly consists of a spring, an electrode probe, an outer sleeve, a movable bottom rod and an electrode sleeve; the conducting strip is a circular metal net sheet with a sliding opening, and is sleeved on the anchor cable and the rod at equal intervals. In the grouting stage, the elastic electrode module is pulled outwards from the hole bottom to move section by section, the spring is pressed, the electrode probe is tightly attached to the conductive loop formed by the arc sliding surface of the sliding opening to measure the resistance value of grouting material, and the resistance value is compared with the standard resistance value in the full state, so that the grouting plumpness and the hollow position are judged. The invention overcomes the limitation that the existing method is only suitable for grouting material after coagulation and hardening, and realizes synchronous grouting, slurry supplementing and detection.
Description
Technical Field
The invention relates to an elastic detection device and a detection method for plumpness in an anchor cable and rod grouting stage, and belongs to the technical field of anchor cable (rod) construction.
Background
The anchor cable (rod) is used as a common support form in slope and tunnel engineering, and the construction quality is important to the engineering safety. The anchor cable construction belongs to hidden engineering, and in the construction process, the grouting pipe is pulled out too fast or the slurry in the hole is not completely removed out of the hole, so that the condition that grouting is not full, hollow and even mortar is not generated in an anchoring section easily, and the slurry remained in the hole is easily covered on the surface of a steel strand, so that the bonding strength of grouting material and the anchor cable is reduced. For the sleeve-free drilling process, when the underground water is abundant and the fluidity is high, the mortar is extremely easy to generate the phenomenon of sand and slurry separation, the consolidation strength is not achieved, and the phenomenon of incomplete grouting is also easy to generate. Whether the mortar is full directly influences the durability and the stability of the anchor rod supporting engineering. When the mortar has the defects of honeycomb, segregation, hollowness and the like, the steel strand of the anchor cable or the rod body of the anchor rod cannot be effectively protected, and particularly, the prestress anchor lock (rod) anchoring system can be corroded or even broken in the service process, so that potential safety hazards are caused. To avoid such problems, it is necessary to detect the filling fullness of the filling material in the filling stage in time. Because the anchor cable construction space is relatively narrow and closed, the common material test and the pulling resistance test are mainly aimed at detecting anchor cable (rod) members after grouting hardening, such as an anchor rod pulling resistance test, a stress wave method, an acoustic wave reflection method and the like, but the method can not directly detect the fullness of grouting materials in a drilling hole in a grouting stage, and if the grouting is not full, the grouting can not be carried out.
At present, the detection of grouting material fullness in the grouting stage is mostly aimed at sleeve grouting at the joint of the assembled building steel bars. The invention discloses a device and a method for detecting sleeve grouting fullness in grouting construction stage, wherein the device is directly plugged by adopting a detection device during grouting, then the position of a transparent plastic pipe in a sleeve is regulated, a push-pull plug is pulled out to a development section during detection, and whether grouting material in the sleeve is full or not is judged by observing the slurry fullness degree of the development section. The invention discloses a method and a device for detecting whether grouting of a fully grouting sleeve is full by a resistance method, and the method and the device are used for measuring grouting fullness in the grouting process according to the relation between the height of the grouting liquid surface in the sleeve and the layer of a metal part exposed by a probe. The contact area between the metal probe and the grouting material in the patent is small, the real resistance value change of the grouting material is difficult to comprehensively and effectively reflect, the grouting material is not suitable for an elongated structure such as an anchor cable (rod), the grouting material cannot extend into a drilling hole to be measured, and the grouting material has large application limitation.
Disclosure of Invention
Based on the above, the invention provides the elastic detection device and the detection method for the plumpness of the anchor cable and the rod in the grouting stage, which can synchronously perform grouting and detection, so as to solve the problem that the prior art is only suitable for detection after grouting material is coagulated and hardened.
The technical scheme of the invention is as follows: an elastic detection device for plumpness in grouting stages of anchor cables and rods comprises:
the elastic electrode module comprises two electrode assemblies and an interelectrode connecting rod, wherein the interelectrode connecting rod is connected between the two electrode assemblies, the electrode assemblies comprise an outer sleeve, a spring, a movable bottom rod, an electrode sleeve and an electrode probe, the movable bottom rod is elastically connected to the outer sleeve through the spring, the electrode sleeve is arranged at two ends of the movable bottom rod, the electrode probe is arranged on the electrode sleeve, the electrode probe is connected with an electrode lead, the outer sleeve is slidably arranged on a running sliding rope, and one of the electrode assemblies is provided with a traction rope.
The plane of the conductive mesh is provided with a sliding port, a grouting hole, anchor rib holes, an inner insulating ring and an outer insulating ring, the inner insulating ring is annularly arranged on the anchor rib holes, and a plurality of conductive meshes are sleeved on the anchor cable and the rod through the anchor rib holes at intervals.
And the running sliding rope is fixed on the head and the tail conductive meshes on the anchor cable and the rod, and is arranged above the sliding opening in a penetrating way.
The handheld detector comprises a binding post, a change-over switch, a signal detection module, a data processing module, an audible-visual alarm module, a liquid crystal display module, a display screen, an LED alarm lamp and a buzzer alarm, wherein the binding post is connected with an electrode lead, the change-over switch is connected with the signal detection module, the signal detection module is connected with the data processing module, the data processing module is respectively connected with the audible-visual alarm module and the liquid crystal display module, the audible-visual alarm module is respectively connected with the LED alarm lamp and the buzzer alarm, and the display screen is connected with the liquid crystal display module.
Optionally, the terminal is 4, respectively with 4 of two electrode assemblies electrode lead connection, change over switch includes 0 shelves, 1 shelves, 2 shelves and 3 shelves, 0 shelves represent the power disconnection, 1 shelves represent same two of electrode assemblies electrode lead with signal detection module connects, 2 shelves represent two of two electrode assemblies electrode lead with signal detection module connects, 3 shelves represent two other electrode assemblies electrode lead with signal detection module connects.
Optionally, the conductive mesh is a circular metal mesh with a U-shaped notch, the diameter of the conductive mesh is smaller than that of the drilled hole, an outer insulating ring is arranged on the periphery of the conductive mesh, and supports are arranged on the outer insulating ring at intervals along the circumferential direction of the outer insulating ring.
Optionally, the outer sleeve is made of insulating materials, the upper end of the outer sleeve is closed, the lower end of the outer sleeve is open, the top of the spring is fixedly connected in the outer sleeve, the movable bottom rod is located below the outer sleeve, and in a natural state, the spring drives the movable bottom rod to move downwards.
Optionally, the bottom of the electrode probe is a hemispherical contact probe, the bottom surface of the corresponding sliding port is an arc sliding surface, and in a natural state, the bottom of the hemispherical contact probe is lower than the arc sliding surface.
Optionally, at least two lifting holes are formed in the top of the outer sleeve, and the lifting holes are arranged on the running sliding rope in a penetrating mode.
The handheld detector also comprises a power supply circuit, a reset circuit, a crystal oscillator circuit and E which are connected with the data processing module 2 PROM memory module, and USB interface.
Optionally, the haulage rope is provided with equidistant length marks so as to observe the pulling distance.
The invention also provides a detection method of the elastic detection device for the plumpness of the anchor cable and the rod in the grouting stage, which comprises the following steps:
s1, before detecting grouting fullness of a drilling hole, preparing a plastic cylinder with the same diameter and height as those of the drilling hole and the same distance as those of conductive meshes in the drilling hole outside the drilling hole, fixing the conductive meshes at the upper end and the lower end, saturating and filling slurry with the same property as that of the grouting material of the drilling hole, measuring the resistance value of the plastic cylinder as a standard resistance value by adopting a conventional universal meter, and reserving the plastic cylinder as a subsequent comparison;
s2, hooping the conductive meshes on anchor cables and rods at equal intervals, fixing the running slide ropes above the first conductive mesh and the second conductive mesh, and sliding and installing the elastic electrode module on the running slide ropes;
s3, moving the elastic electrode module to the tail end of the running sliding rope, winding the front electrode lead and the rear electrode lead on the traction rope, leading out the outside of the hole, and numbering at the wire head in sequence;
s4, penetrating a grouting pipe into the grouting hole on the conductive mesh, and moving the elastic electrode module to the tail end of the travelling slide rope;
s5, placing the anchor cable, the rod, the conductive mesh, the travelling slide rope, the elastic electrode module and the grouting pipe into a drill hole;
s6, grouting by adopting a hole bottom slurry returning method, after grouting operation of a preset amount is completed, connecting the 4 electrode leads with binding posts corresponding to the handheld detector respectively, simultaneously rotating a change-over switch to 1 grade, and pulling the traction rope (116) towards an orifice so as to drive the elastic electrode module to slowly move;
s7, stopping moving the elastic electrode module after the LED alarm lamp and the buzzer alarm detect that the electrode probe is in contact with the conductive mesh, sequentially rotating the change-over switch to 2 nd gear and 3 rd gear, measuring and recording the resistance value of the grouting material of the segment, and displaying the resistance value on a display screen;
s8, comparing the measured resistance value of the segment with a standard resistance value, and when the measured value is smaller than the standard value, indicating that the segment grouting material is not full; otherwise, the compactness of the mortar reaches the requirement;
and S9, when the drilling hole is not full, secondary grouting can be performed, and after the requirement is met, the steps S6-S8 are repeated, and the operation of the next section is performed until the grouting and detection of the whole drilling hole are completed.
Compared with the prior art, the invention has the following beneficial effects:
1. the method can detect the plumpness and the hollow position of grouting materials in the grouting stage of the anchor cable and the rod, overcomes the limitation that the existing detection method is only suitable for the solidification and hardening of mortar, and realizes synchronous grouting, slurry supplementing and detection.
2. By arranging the audible and visual alarm function in the handheld detector, the contact state of the electrode and the arc sliding surface of the conducting strip can be accurately judged, a basis is provided for determining the time of resistance measurement, and the detection efficiency is high, the speed is high, and the operation is simple, convenient and rapid.
3. Through setting up the conductive mesh, change the probe point contact form into the face contact in the past, the resistance value of survey can reflect the whole grouting condition of full festival section, conductive mesh has also played the effect of traditional anchor rope centering isolation support simultaneously.
Drawings
FIG. 1 is a schematic diagram of an anchor cable and rod grouting stage detection device;
FIG. 2 is a front view of a flexible electrode module;
FIG. 3 is a top view of a flexible electrode module;
FIG. 4 is a top view of the movable bottom bar;
FIG. 5 is a side view of a conductive sheet;
FIG. 6 is a schematic diagram of a hand-held detector;
FIG. 7 is a schematic diagram of the circuit connections of the handheld detector;
fig. 8 is a flow chart for cable grout fullness detection.
In the drawing the view of the figure,
1 an elastic electrode module;
11 electrode assembly, 12 inter-electrode connecting rod;
111 outer sleeve, 112 electrode probe, 113 movable bottom rod, 114 electrode sleeve, 115 spring, 116 hauling rope, 117 lifting hole, 118 electrode lead wire
2 conductive mesh;
21 sliding ports, 22 grouting holes, 23 anchor bar holes, 24 inner insulating rings, 25 outer insulating rings, 26 metal meshes, 27 arc sliding surfaces and 28 supports;
3, running a sliding rope;
4, a handheld detector;
41 wiring terminals, 42 change-over switches, 43 LED alarm lamps, 44 buzzer alarms, 45 USB interfaces, 46 display screens, 47 signal detection modules, 48 power supply circuits, 49 reset circuits, 410 crystal oscillator circuits, 411 audible and visual alarm modules, 412E 2PROM storage modules, 413 liquid crystal display modules and 414 data processing modules;
5, drilling holes;
6 grouting material;
7, anchor cables and rods;
8 soil layers.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
Referring to fig. 1 to 8, an elastic device for detecting plumpness in grouting stage of anchor cable and rod according to the present embodiment includes an elastic electrode module 1, a conductive mesh 2, a running sliding rope 3 and a handheld detector 4.
The elastic electrode module 1 is mainly used for being in movable contact with the conductive mesh 2 to form a conductive loop, and comprises two electrode assemblies 11 and an interelectrode connecting rod 12, wherein the interelectrode connecting rod 12 is connected between the two electrode assemblies 11, the electrode assemblies 11 comprise an outer sleeve 111, a spring 115, a movable bottom rod 113, an electrode sleeve 114 and an electrode probe 112, the movable bottom rod 113 is elastically connected to the outer sleeve 111 through the spring 115, the electrode sleeve 114 is fixed to two ends of the movable bottom rod 113, the electrode probe 112 is arranged on the electrode sleeve 114, the electrode probe 112 is connected with an electrode lead 118, the outer sleeve 111 is slidably arranged on the running sliding rope 3, and a traction rope 116 is arranged on one electrode assembly 11, the elastic electrode module 1 can be pulled by the traction rope 116 to move along the running sliding rope 3, and when the elastic electrode module 1 moves between two adjacent conductive meshes 2, and the two electrode probes 112 are just contacted with the arc-shaped sliding surfaces 27 of the sliding openings 21, the conductive loop can be formed. In this embodiment, the inter-electrode link 12 is made of a non-conductive material, and the traction rope 116 is mounted on the outer wall surface of the outer sleeve 111.
Preferably, the outer sleeve 111 is made of insulating materials, is a hollow cylinder, the upper end of the hollow cylinder is closed, the lower end of the hollow cylinder is open, the top of the spring 115 is fixedly connected to the inner top surface of the outer sleeve 111, the movable bottom rod 113 is located below the outer sleeve 111, and the spring 115 drives the movable bottom rod 113 to move downwards in a natural state. When the electrode probe 112 moves into the sliding port 21 and contacts the arc-shaped sliding surface 27, the spring 115 is in a compressed state, and at this time, the electrode probe 112 is in close contact with the conductive mesh 2, thereby forming a conductive loop.
Preferably, the bottom of the electrode probe 112 is a hemispherical contact probe, the bottom of the corresponding sliding opening 21 is an arc sliding surface 27, and in a natural state, the bottom of the hemispherical contact probe is slightly lower than the arc sliding surface 27, so that the electrode probe 112 can smoothly pass through the arc sliding surface 27 by the above structure, and the contact reliability can be ensured.
Preferably, at least two lifting holes 117 are formed in the top of the outer sleeve 111, and at least two corresponding running slide ropes 3 are provided, and the lifting holes 117 are formed in the running slide ropes 3 in a penetrating manner, so that the elastic electrode module 1 can be stably moved.
The conductive mesh 2 is mainly used for contacting with mortar. The conductive mesh 2 is mainly made of a metal mesh 26, and a sliding opening 21, a grouting hole 22, an anchor rib hole 23, an inner insulating ring 24 and an outer insulating ring 25 are arranged on the plane of the conductive mesh, wherein the anchor rib hole 23 is used for being arranged on an anchor cable and a rod 7 in a penetrating mode, and the inner insulating ring 24 is annularly arranged on the anchor rib hole 23 to prevent the anchor cable, the rod 7 and the electrode probe 112 from forming a conductive loop.
Preferably, the conductive mesh 2 is disc-shaped, has a diameter smaller than that of the drill hole 5, is provided with an outer insulating ring 25 on the periphery thereof, and is provided with supports 28 at equal intervals along the circumferential direction of the outer insulating ring 25; these holders 28 may be insulating support blocks, which enable a relative fastening of the conductive mesh 2 with the borehole 5, avoiding displacement thereof.
The running slide rope 3 is used as a running track for axially moving the elastic electrode module 1, and provides a guiding function for the slow movement of the elastic electrode module 1. The running slide rope 3 is fixed on the head and the tail conductive meshes 2 on the anchor cable and the rod 7, and the running slide rope 3 is arranged above the slide opening 21 in a penetrating way, so that the elastic electrode module 1 can slide through the slide opening 21. In this embodiment, the travelling slide 3 may be a travelling wire.
The handheld detector 4 is used for being connected with 4 electrode leads (118) in the elastic electrode module 1, and is mainly used for monitoring whether the electrode probe 112 is in contact with the conductive mesh 2 or not and measuring the resistance value of the grouting material 6. In the embodiment, a body of the handheld detector 4 is provided with a binding post 41, an LED alarm lamp 43, a buzzer alarm 44, a change-over switch 42, a USB interface 45 and a display screen 46; the body is also internally provided with a signal detection module 47, a power circuit 48, a reset circuit 49, a crystal oscillator circuit 410 and an audible and visual alarmModules 411, E 2 PROM memory module 412, liquid crystal display module 413 and data processing module 414. The binding post 41 and the change-over switch 42 are connected with the signal detection module 47; the LED alarm lamp 43 and the buzzer alarm 44 are connected with the audible and visual alarm module 411; the display screen 46 is connected with the liquid crystal display module 413; signal detection module 47, power supply circuit 48, reset circuit 49, crystal oscillator circuit 410, audible and visual alarm module 411, E 2 The PROM memory module 412 and the liquid crystal display module 413 are connected to the data processing module 414.
Preferably, the change-over switch 42 includes four gears "0,1,2, 3". In the present embodiment, "0" indicates power off, "1" indicates that the terminals 41 and 2,3 and 4 are respectively connected to form a determination circuit, "2" and "3" indicates that the terminals 41 and 4, 2 and 3 are respectively connected to form a measurement circuit. In operation, the handle is rotated clockwise in fig. 6 to cause the contacts to close or open in a prescribed sequence. The detection circuit is used for identifying the contact state of the electrode probe 112 and the conductive mesh 2. When the LED lamp is lightened and the buzzer alarm 44 sounds, the electrode probe 112 is indicated to be in contact with the conductive mesh 2, so that a conductive loop with measurable resistance is formed; when the LED light is dim or extinguished and the buzzer alarm 44 is not loud, it indicates that the two are in a separated state. The detection principle is that when the electrode probes 112 are not contacted with the arc-shaped sliding surface 27 of the sliding opening 21 of the conductive mesh 2, the resistance between the electrode probes 112 on two sides of the same electrode assembly 11 is larger, so that the current of a detection circuit is small, an indicator lamp is dim or not bright, and an alarm can not be driven to generate alarm sound; when the electrode probe 112 is in contact with the arc sliding surface 27, the electrode probe 112 is made of metal, so that the resistivity is small, and the indicator light is brighter and sounds with a buzzer alarm.
Optionally, the data processing module 414 may be an STC89C52 single-chip microcomputer, and adopts I 2 C communication pair E 2 The PROM memory module 412 performs data access, and uses UART or CAN communication to realize information interaction with the liquid crystal display module 413; the signal detection module 47 comprises sampling resistor, voltage dividing circuit, operational amplifier, auxiliary power supply, capacitor, etc.; contact determination and actuation to different gear positions by the change-over switch 42Measuring resistance; the data processing module 414 calculates the resistance value of each section of grouting material 6 according to the current value on the sampling resistor, and compares and analyzes the resistance value with the standard resistance value to judge the filling degree of grouting; the measured values and the analysis result are then transferred to the liquid crystal display module 413 and stored in E 2 PROM data storage module 412. In the embodiment, the 2 and 3 gears measure the resistance of the same segment of grouting material 6, and the measured data are compared and verified with each other through E 2 The PROM data storage module (412) is stored in the handheld detector 4, and can be exported later through the USB interface 45.
The detection method of the elastic plumpness detection device in the grouting stage of the anchor cable and the rod in the embodiment comprises the following steps of:
s1, before the grouting fullness of a drilling hole 5 is detected, preparing a plastic cylinder with the same diameter and height as those of the drilling hole 5 and the same distance as those of the conductive mesh 2 in the hole outside the hole, fixing the conductive mesh 2 at the upper end and the lower end, saturating and filling slurry with the same property as that of the grouting material 6 of the drilling hole 5, measuring the resistance value of the plastic cylinder by adopting a conventional multimeter as a standard resistance value, and reserving the plastic cylinder as a subsequent comparison; in this embodiment, the electrode leads 118 connected to the front and rear electrode assemblies (11) are respectively numbered, e.g., 1,2 and 3, 4, respectively, and correspondingly, the 4 binding posts 41 are marked with different colors, e.g., two red colors and two yellow colors, respectively corresponding to the electrode leads 118 1,2 and 3, 4.
S2, hooping the conductive meshes 2 on anchor cables and rods 7 at equal intervals, fixing the running slide ropes 3 above the first conductive mesh 2 and the second conductive mesh 2, and slidably mounting the elastic electrode module 1 on the running slide ropes 3;
s3, moving the elastic electrode module 1 to the tail end of the running slide rope 3, and winding the front and rear electrode leads 118 on the traction rope 116 to be led out of the holes;
s4, penetrating a grouting pipe into the grouting holes 22 on the conductive mesh 2, and moving the elastic electrode module 1 to the tail end of the travelling slide rope 3;
s5, placing anchor cables, rods 7, the conductive mesh 2, the running sliding ropes 3, the elastic electrode modules 1 and the grouting pipes into the drill holes 5;
s6, grouting by adopting a hole bottom slurry returning method, after grouting operation of a preset amount is completed, respectively connecting the 4 electrode leads 118 with the binding posts 41 corresponding to the handheld detector 4, simultaneously rotating the change-over switch 42 to 1 grade, and pulling the traction rope 116 towards the hole opening so as to drive the elastic electrode module 1 to slowly move;
s7, stopping moving the elastic electrode module 1 after the LED alarm lamp 43 and the buzzer alarm 44 detect that the electrode probe 112 is in contact with the conductive mesh 2, rotating the change-over switch 42 to 2 nd gear and 3 rd gear in sequence, measuring and recording the resistance value of the segmental grouting material 6, and displaying the resistance value on the display screen 46;
s8, comparing the measured resistance value of the segment with a standard resistance value, and when the measured value is smaller than the standard value, indicating that the segment grouting material 6 is not filled; otherwise, the compactness of the mortar reaches the requirement;
and S9, when the drilling hole is not full, secondary grouting can be performed, and after the requirement is met, the steps S6-S8 are repeated, and the operation of the next section is performed until the grouting and detection of the whole drilling hole 5 are completed.
In summary, the invention provides an elastic detection device and a detection method for plumpness in the grouting stage of an anchor cable and a rod. The device comprises an elastic electrode module 1, a conductive net sheet 2, a running sliding rope 3 and a handheld detector 4; the elastic electrode module 1 consists of a front electrode assembly 11 and a rear electrode assembly 11 which are the same and are connected through an interelectrode connecting rod 12, and each electrode assembly 11 consists of a spring 115, an electrode probe 112, an outer sleeve 111, a movable bottom rod 113, an electrode sleeve 114 and the like; the conductive sheet is a circular metal net 26 with sliding openings 21 (U-shaped notch), and is uniformly sleeved on the anchor cable and the rod 7. In the grouting stage, the elastic electrode module 1 is pulled outwards from the hole bottom to move section by section, the spring 115 is utilized to press, and the electrode probe 112 is tightly clung to the conductive loop formed by the arc-shaped sliding surface 27 of the sliding opening 21 to measure the resistance value of the grouting material 6 and compare with the standard resistance value in the full state, so that the grouting fullness and the hollow position are judged. Therefore, the invention overcomes the limitation that the existing method is only suitable for grouting material after coagulation and hardening, and realizes synchronous grouting, slurry supplementing and detection.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. The utility model provides an anchor rope, pole grouting stage plumpness elasticity detection device which characterized in that includes:
the elastic electrode module (1) comprises two electrode assemblies (11) and an interelectrode connecting rod (12), wherein the interelectrode connecting rod (12) is connected between the two electrode assemblies (11), the electrode assemblies (11) comprise an outer sleeve (111), a spring (115), a movable bottom rod (113), an electrode sleeve (114) and an electrode probe (112), the movable bottom rod (113) is elastically connected to the outer sleeve (111) through the spring (115), the electrode sleeve (114) is arranged at two ends of the movable bottom rod (113), the electrode probe (112) is arranged on the electrode sleeve (114), the electrode probe (112) is connected with an electrode lead (118), the outer sleeve (111) is slidably arranged on a running sliding rope (3), and a traction rope (116) is arranged on one electrode assembly (11);
the plane of the conductive mesh (2) is provided with a sliding port (21), a grouting hole (22), an anchor rib hole (23), an inner insulating ring (24) and an outer insulating ring (25), the inner insulating ring (24) is annularly arranged on the anchor rib hole (23), and a plurality of conductive meshes (2) are sleeved on the anchor cable and the rod (7) at intervals through the anchor rib hole (23);
the running sliding rope (3) is fixed on the first conductive mesh (2) and the second conductive mesh (2) on the anchor cable and the rod (7), and the running sliding rope (3) is arranged above the sliding opening (21) in a penetrating way;
the handheld detector (4) comprises a binding post (41), a change-over switch (42), a signal detection module (47), a data processing module (414), an audible and visual alarm module (411), a liquid crystal display module (413), a display screen (46), an LED alarm lamp (43) and a buzzer alarm (44), wherein the binding post (41) is connected with an electrode lead (118), the change-over switch (42) is connected with the signal detection module (47), the signal detection module (47) is connected with the data processing module (414), the data processing module (414) is respectively connected with the audible and visual alarm module (411) and the liquid crystal display module (413), the audible and visual alarm module (411) is respectively connected with the LED alarm lamp (43) and the buzzer alarm (44), and the display screen (46) is connected with the liquid crystal display module (413).
2. The anchor cable, rod grouting stage plumpness elastic detection device according to claim 1, characterized in that the number of binding posts is 4, and the binding posts are respectively connected with 4 electrode leads (118) of the two electrode assemblies (11), the change-over switch (42) comprises a 0 gear, a 1 gear, a 2 gear and a 3 gear, wherein the 0 gear represents that a power supply is disconnected, the 1 gear represents that two electrode leads (118) of the same electrode assembly (11) are connected with the signal detection module (47), the 2 gear represents that two electrode leads (118) of the two electrode assemblies (11) are connected with the signal detection module (47), and the 3 gear represents that the other two electrode leads (118) of the two electrode assemblies (11) are connected with the signal detection module (47).
3. The elastic detection device for the plumpness of the anchor cable and the rod grouting stage according to claim 2, wherein the conductive mesh (2) is a circular metal mesh (26) with a U-shaped notch, the diameter is smaller than that of the drilling hole (5), the outer insulating ring (25) is arranged on the periphery of the conductive mesh, and the outer insulating ring (25) is provided with supporting seats (28) at equal angular intervals along the circumferential direction of the conductive mesh.
4. The elastic detection device for the plumpness of the anchor cable and the rod grouting stage according to claim 2, wherein the outer sleeve (111) is made of an insulating material, the upper end of the outer sleeve is closed, the lower end of the outer sleeve is open, the top of the spring (115) is fixedly connected in the outer sleeve (111), the movable bottom rod (113) is positioned below the outer sleeve (111), and in a natural state, the spring (115) drives the movable bottom rod (113) to move downwards.
5. The elastic detection device for plumpness at the grouting stage of the anchor cable and the rod according to claim 4, wherein the bottom of the electrode probe (112) is a hemispherical contact probe, the bottom surface of the corresponding sliding opening (21) is an arc sliding surface (27), and the bottom of the hemispherical contact probe is lower than the arc sliding surface (27) in a natural state.
6. The elastic detection device for plumpness in the grouting stage of the anchor cable and the rod according to claim 2, wherein the top of the outer sleeve (111) is provided with at least two lifting holes (117), and the lifting holes (117) are penetrated on the running sliding rope (3).
7. The device for detecting the fullness of an anchor cable and a grouting stage according to claim 2, wherein the handheld detector (4) further comprises a power circuit (48), a reset circuit (49), a crystal oscillator circuit (410) and an E2PROM memory module (412) and a USB interface (45) which are connected with the data processing module (414).
8. The device for detecting the fullness of an anchor cable and a rod grouting stage according to claim 2, wherein the haulage cable (116) is provided with equidistant length marks for observing the pulling distance.
9. The method for detecting the plumpness and elasticity detecting device for the anchor cable and the rod grouting stage according to any one of claims 2 to 8, comprising the following steps:
s1, before grouting plumpness of a drilling hole (5) is detected, preparing a plastic cylinder with the same diameter and height as the drilling hole (5) and the same distance as the conductive mesh (2) in the hole outside the hole, fixing the conductive mesh (2) at the upper end and the lower end, saturating and grouting slurry with the same property as the grouting slurry (6) of the drilling hole (5), measuring the resistance value of the plastic cylinder by adopting a conventional universal meter as a standard resistance value, and reserving the plastic cylinder as a subsequent comparison;
s2, hooping the conductive meshes (2) on anchor cables and rods (7) at equal intervals, fixing the running slide ropes (3) above the first conductive mesh and the second conductive mesh (2), and sliding the elastic electrode modules (1) on the running slide ropes (3);
s3, moving the elastic electrode module (1) to the tail end of the running sliding rope (3), winding the front electrode lead and the rear electrode lead (118) on the traction rope (116), leading out the outside of the holes, and numbering at the wire heads in sequence;
s4, penetrating a grouting pipe into the grouting holes (22) on the conductive mesh (2), and moving the elastic electrode module (1) to the tail end of the travelling slide rope (3);
s5, placing an anchor cable, a rod (7) together with the conductive mesh (2), the running sliding rope (3), the elastic electrode module (1) and the grouting pipe into a drill hole (5);
s6, grouting by adopting a hole bottom slurry returning method, after grouting operation of a preset amount is completed, connecting the 4 electrode leads (118) with binding posts (41) corresponding to the handheld detector (4) respectively, simultaneously rotating a change-over switch (42) to 1 grade, and pulling the traction rope (116) towards an orifice so as to drive the elastic electrode module (1) to slowly move;
s7, stopping moving the elastic electrode module (1) after the LED alarm lamp (43) and the buzzer alarm (44) detect that the electrode probe (112) is in contact with the conductive mesh (2), sequentially rotating the change-over switch (42) to 2 and 3 gears, measuring and recording the resistance value of the segmental grouting material (6), and displaying the resistance value on the display screen (46);
s8, comparing the measured resistance value of the segment with a standard resistance value, and when the measured value is smaller than the standard value, indicating that the segment grouting material (6) is not filled; otherwise, the compactness of the mortar reaches the requirement;
and S9, when the drilling hole is not full, secondary grouting can be performed, and after the requirement is met, the steps S6-S8 are repeated, and the operation of the next section is performed until the grouting and detection of the whole drilling hole (5) are completed.
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