CN114088774A - Anchor cable and rod grouting stage plumpness snap ring type detection device and detection method - Google Patents
Anchor cable and rod grouting stage plumpness snap ring type detection device and detection method Download PDFInfo
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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/02—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
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Abstract
The invention discloses a slip ring type detection device and a detection method for fullness in an anchor cable and rod grouting stage. The device comprises a conductive mesh, a walking conduit, a movable electrode module and a handheld detector, wherein the walking conduit is formed by splicing a plurality of walking sections and comprises an expanding section, a gradual changing section and a reducing section; the movable electrode module consists of a front set of electrode sleeve and a rear set of same electrode sleeve which are connected through an internode sleeve, and each set of electrode sleeve consists of two metal sleeves, an insulating sleeve and an electrode tentacle; the conductive net sheets are sleeved on the anchor cables and the rods at equal intervals. In the grouting stage, the movable electrode module is pulled outwards from the bottom of the hole to move section by section, the resistance value of the grouting material is measured by a conductive loop formed by the diameter-reducing section snap ring structure and is compared with the standard resistance value in a completely full state, and then the grouting fullness and the hollow position are judged. The invention overcomes the limitation that the existing method is only suitable for the grouting material after setting and hardening, and realizes the synchronous operation of grouting, grout supplementing and detection.
Description
Technical Field
The invention relates to a plumpness snap ring type detection device and a detection method for an anchor cable and a rod grouting stage, and belongs to the technical field of anchor cable (rod) construction.
Background
With the wide application of the shotcrete support technology in foundation pit, side slope, tunnel and other projects, the quality detection and defect identification of pore grouting are more and more generally regarded. Grouting fullness and non-compact positions of the anchoring system are two key indexes for evaluating whether the anchoring system can exert the maximum utility. The adhesive property between anchor cable (rod) and mortar directly determines the design of anchoring length, and its adhesive force mainly consists of chemical adhesive force, friction force and mechanical gripping force 3 on the contact surface of anchor rod and mortar. When the soil layer is not clean, impurities such as accumulated water, soil or rock debris and the like are left in the holes, cavities, slurry or local cement soil are inevitably included in the grouting material, and the anchor bars can be tightly attached to or sunk into the hole walls under the action of elastic bending deformation under the conditions of loose and soft hole walls, non-straight drilled holes, inclined lower anchors and the like, so that no slurry is wrapped locally. When the mortar has the defects of honeycombs, segregation, cavities and the like, mud residues or mud skins are easy to be locally attached to the surface of the rib body to reduce the bonding strength, so that the bonding force and the bond stress are ineffective, and particularly, a prestressed anchor cable (rod) anchoring system is corroded or even broken in the service process, so that potential safety hazards are caused. Therefore, whether the mortar is full or not directly influences the durability and stability of the shotcrete supporting engineering. Therefore, the anchor cable (rod) for engineering generally needs to be subjected to a drawing test or a non-destructive testing of compactness, such as audio frequency stress wave and the like; however, these methods are only suitable for use after the grout has hardened, and if the grout is found to be not dense, the grout cannot be replenished.
In the field construction of the anchor cable, the orifice does not exhaust any more, and the standard for finishing grouting is used when the orifice overflows or the grouting rate is lower than a certain value, however, the actual grouting amount is easily larger than the theoretical amount due to the delayed judgment of the grouting amount. In addition, for a weak stratum, the phenomena of poor drilling and forming, incapability of filling gaps by a grout stop plug, easy generation of problems of grout overflow, grout leakage and poor plugging are often caused, and the grouting under pressure cannot reach the preset pressure.
At present, the mortar plumpness detection in the grouting stage is mainly aimed at sleeve grouting at the joint of the assembled construction steel bars. The Chinese invention patent (CN201910688408.5) discloses a grouting fullness monitoring device for an assembled concrete structure steel bar sleeve, which accurately measures the real-time fullness state of grouting material in the grouting process according to the relationship between the height of the liquid level of the grouting material in the sleeve and the length of a hydrophobic electrode submerged by the grouting material. However, this type of device is primarily directed to small sleeves for prefabricated buildings and is not suitable for use with elongate structures such as anchor rods (cables). The Chinese invention patent (CN202110078459.3) discloses an intelligent grouting sleeve and a saturation and damage position detection device and method thereof, wherein a detection device is formed by connecting a conducting strip with a power supply and a universal meter in series, the resistance of grouting material can be detected by a formed conducting loop after the conductive grouting material is injected, and the saturation and unsaturated positions of the grouting material are detected according to the resistance values of different positions. However, this device is primarily directed to small sleeves for prefabricated buildings and is not suitable for use with elongate structures such as anchor rods (cables). The device for early warning of the grouting position in anchor cable construction and the construction method thereof disclosed by the Chinese invention patent (CN201810661760.5) detect the pressure at the elastic structure in real time through the elastic structure arranged at the boundary position and the pressure detection structure connected with the elastic structure, and send an alarm to prompt grouting stop when the pressure changes. The device has realized the detection to the slip casting position, but structural style is comparatively complicated and the cost is higher, the on-the-spot large tracts of land of not being convenient for is promoted.
Disclosure of Invention
Based on the above, the invention provides the anchor cable and rod grouting stage plumpness snap ring type detection device and the detection method capable of synchronously performing grouting and detection, so as to solve the problem that the prior art is only suitable for detection after the grouting material is condensed and hardened.
The technical scheme of the invention is as follows: an anchor rope, pole grout stage plumpness snap ring formula detection device includes:
the plane of the conductive mesh is provided with a conduit hole, a grouting hole, an anchor bar hole, an inner insulating hole and an outer insulating ring; the inner insulating ring is annularly arranged on the anchor bar hole, the plurality of conductive meshes are sleeved on the anchor cable and the rod at intervals through the anchor bar hole, and the anchor cable and the rod are positioned in the drilled hole.
The walking guide pipe is a hollow circular pipe and is formed by sequentially splicing a plurality of walking sections along the axial direction of a drill hole, the walking sections are arranged between adjacent conductive meshes, the walking sections are sequentially provided with an expanding section, a gradual changing section and a reducing section from the middle part to two sides, the expanding section and the gradual changing section are made of insulating materials, and the reducing section is made of conductive materials and is clamped in the guide pipe hole.
The movable electrode module, the length of movable electrode module with walk the length of line section the same, including two electrode sleeve pipes, internode sleeve pipe and haulage rope, internode bushing in between two electrode sleeve pipes, the electrode sleeve pipe with internode sleeve pipe can pass to be located in the pipe hole to be connected with the haulage rope, the electrode sleeve pipe includes two metal sleeve pipes and an insulating sleeve pipe, the metal sleeve pipe respectively with electrode lead wire connection, insulating sleeve connect in between two metal sleeve pipes, just be equipped with the electrode tentacle on the electrode sleeve pipe.
Hand-held type detector, including terminal, change over switch, signal detection module, data processing module, audible and visual alarm module, liquid crystal display module, display screen, LED alarm lamp and buzzer siren, the terminal with electrode pin thread connects, the terminal change over switch with signal detection module connects, signal detection module with data processing module connects, data processing module respectively with audible and visual alarm module with liquid crystal display module connects, audible and visual alarm module respectively with the LED alarm lamp with the buzzer siren is connected, the display screen with liquid crystal display module links to each other.
Optionally, the terminal is 4, respectively with 4 of two electrode subassemblies (11) electrode lead wire (118) are connected, change over switch (42) includes 0 shelves, 1 shelves, 2 shelves and 3 shelves, 0 shelves represent the power disconnection, 1 shelves represent same two of electrode sleeve (31) electrode lead wire (35) with signal detection module (47) is connected, 2 shelves represent wherein two of two electrode sleeve (31) electrode lead wire (35) with signal detection module (47) is connected, 3 shelves represent the other two of two electrode sleeve (31) electrode lead wire (35) with signal detection module (47) are connected.
Optionally, the conductive mesh is a circular metal mesh with a plurality of circular holes, 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 equal angular intervals along the circumferential direction of the conductive mesh.
Optionally, the electrode sleeve includes two metal sleeves and an insulating sleeve, the metal sleeves are respectively connected with an electrode lead, the insulating sleeve is connected between the two metal sleeves, the electrode tentacles are circumferentially arranged outside the metal sleeves at intervals, the diameter of the electrode sleeve is smaller than the inner diameter of the reduced section, and the expansion height of the electrode tentacles is larger than the inner diameter of the reduced section; in a natural state, the electrode tentacle is loosened and opened, and in the necking section, the communication circuit is tightened and moves to pass through.
Optionally, the electrode tentacles are claw-shaped cranks facing to the same side, and the electrode tentacles are alternately arranged on the circumferential surfaces of the two metal sleeves.
Optionally, the handheld detector further includes a power circuit, a reset circuit, a crystal oscillator circuit, an E2PROM memory module, and a USB interface, which are connected to the data processing module.
Optionally, the grouting observation device further comprises a grouting observation assembly, wherein the grouting observation assembly comprises:
the grout stopping plug is used for penetrating the anchor cable and the rod and is positioned at the separation part of the anchoring section and the free section of the drill hole;
the flexible water bag is arranged on one side of the grout stopping plug, which is close to the outside of the drill hole;
one end of the liquid level pipe is communicated with the flexible water bag, and the other end of the liquid level pipe extends out of the drill hole along the anchor cable and the rod; stopping grouting when the liquid level in the liquid level pipe obviously rises in the grouting process.
Optionally, the flexible water bag is filled with colored liquid.
The invention also provides a detection method of the anchor cable and rod grouting stage plumpness snap ring type detection device, which comprises the following steps:
s1, before detecting the grouting fullness of the drill hole, preparing a plastic cylinder with the same diameter as the drill hole and the same height as the distance between the conductive meshes in the hole outside the hole, fixing the conductive meshes at the upper end and the lower end, performing saturated grouting with slurry with the same property as the grouting material of the drill hole, measuring the resistance value of the slurry by using a conventional universal meter as a standard resistance value, and reserving the standard resistance value for subsequent comparison;
s2, sleeving the conductive meshes on the anchor cables and the rods at equal intervals, then penetrating the walking sections into the conduit holes of two adjacent conductive meshes, and sequentially connecting to form the walking conduit with the same length as the drilled hole;
s3, placing the movable electrode module at the tail end of the walking guide pipe, winding the front and rear four electrode leads on the traction rope, arranging the electrode leads along the walking guide pipe, leading out of holes, and numbering the electrode leads in sequence at the wire ends;
s4, a grouting pipe is arranged in the grouting hole in the conductive mesh in a penetrating mode, and the pipe orifice end and the movable electrode module are located at the bottom end together;
s5, placing an anchor cable and a rod into the borehole together with the conductive mesh, the running guide pipe, the movable electrode module and the grouting pipe;
s6, grouting by a hole bottom slurry return method, stopping grouting when the liquid level of the liquid level pipe rises obviously, connecting the 4 electrode leads with corresponding binding posts of the handheld detector respectively, rotating the change-over switch to 1 gear, and pulling the traction rope towards an orifice so as to drive the movable electrode module to move slowly;
s7, stopping pulling the movable electrode module after the LED alarm lamp and the buzzer alarm detect that the electrode tentacle is contacted with the conductive mesh, sequentially rotating the change-over switch to 2 grades and 3 grades, measuring and recording the resistance value of the grouting material of the section, and displaying the resistance value on a display screen;
s8, comparing the measured resistance value of the section with a standard resistance value, and when the measured value is smaller than the standard value, indicating that the section is not filled with grouting material; otherwise, the compactness of the mortar meets the requirement;
and S9, when the detection result shows that the hole is not full, performing secondary grouting, and after the requirement is met, repeating the steps S6-S8 to perform the operation of the next section until the grouting and detection work of the whole drilling hole is completed.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can detect the plumpness and hollow positions of the grouting material in the grouting stage of the anchor cable and the rod, overcomes the limitation that the existing detection method is only suitable for the mortar after setting and hardening, and realizes the synchronous implementation of grouting, grouting supplement and detection.
2. The handheld detector is provided with the sound-light alarm function, so that the contact state of the electrode and the arc-shaped sliding surface of the conducting strip can be accurately judged, a basis is provided for determining the opportunity of resistance measurement, and the handheld detector is high in detection efficiency, high in speed and simple, convenient and quick to operate.
3. According to the invention, the conductive mesh is arranged, the conventional probe point contact mode is changed into surface contact, the measured resistance value can reflect the whole grouting condition of the whole section, and meanwhile, the conductive mesh also plays a role in centering and isolating the bracket of the traditional anchor cable.
4. The invention can visually judge whether the phenomena of slurry leakage and slurry overflow exist by observing the change of the liquid level outside the drill hole, and prompt the end of the grouting, thereby avoiding the excessive grouting of the slurry consumption.
Drawings
FIG. 1 is a schematic view of a grouting fullness detection apparatus;
FIG. 2 is a schematic view of the running catheter;
FIG. 3 is a general view of a moving electrode module;
FIG. 4 is a side view of the moving electrode;
FIG. 5 is a front elevation view of a conductive mesh;
FIG. 6 is a cross-sectional view of the front electrode tentacle;
FIG. 7 is a cross-sectional view of a rear electrode tentacle;
FIG. 8 is a schematic view of a hand-held test meter;
FIG. 9 is a schematic diagram of the electrical connection of the hand-held test meter;
in the figure:
1, a conductive mesh sheet;
11 conduit holes, 12 grouting holes, 13 anchor bar holes, 14 metal meshes, 15 inner insulating rings, 16 outer insulating rings and 17 supports;
2 running guide pipe;
a diameter expanding section 21, a gradual change section 22 and a diameter reducing section 23;
3 moving the electrode module;
31 electrode sleeve, 32 internode sleeve, 33 traction rope, 34 electrode tentacle; 35 an electrode lead;
311 metal sleeves, 312 insulating sleeves;
4, a handheld detector;
41 binding posts, 42 change-over switches, 43 LED alarm lamps, 44 buzzer alarms, 45 USB interfaces, 46 display screens, 47 signal detection modules and 48 power supply circuits49 reset circuit, 410 crystal oscillator circuit, 411 acousto-optic alarm module, 412E2PROM memory module, 413 LCD module, 414 data processing module;
5 grouting observation assembly;
a 51 stop plug, a 52 flexible water bag and a 53 liquid level pipe;
6, drilling a hole;
7, anchor cables and rods;
8, grouting material;
9 soil layers.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1 to 9, the full scale snap ring type detection device for the anchor cable and rod grouting stage of the present embodiment includes a conductive mesh sheet 1, a running conduit 2, a movable electrode module 3, a grouting observation assembly 5, and a handheld detector 4.
The conductive mesh sheet 1 is mainly used for contacting mortar. The conductive mesh (1) is mainly made of a metal mesh, a conduit hole 11, a grouting hole 12, an anchor bar hole 13, an inner insulating ring 15 and an outer insulating ring 16 are arranged on the plane of the conductive mesh, the anchor bar hole 13 is used for being arranged on an anchor cable and a rod 7 in a penetrating mode, the inner insulating ring 15 is annularly distributed on the anchor bar hole 13, and a conductive loop is prevented from being formed by the anchor cable, the rod 7 and a diameter reducing section 23 of a traveling conduit.
Preferably, the conductive mesh 1 is disc-shaped, the diameter of the conductive mesh is smaller than that of the drilled hole, the periphery of the conductive mesh is provided with an outer insulating ring 16, and supports 17 are arranged at equal intervals along the circumferential direction of the outer insulating ring 16; these seats 17 can be insulating support blocks, which enable the relative fastening of the conductive mesh 1 to the drilled hole 6, avoiding its displacement.
The walking guide pipe 2 provides a guide space for the slow movement of the movable electrode module 3, and can slowly pull the movable electrode module 3 to move according to a preset direction. The walking guide pipe 2 is a hollow circular pipe and is formed by sequentially splicing a plurality of walking sections along the axial direction of a drilled hole, the total length of the walking guide pipe 2 is the total length of the drilled hole, the walking guide pipes 2 are sequentially arranged between two adjacent conductive net sheets 1, the walking guide pipe 2 is sequentially provided with an expanding section 21, a gradual change section 22 and a reducing section 23 from the middle part to two sides, the expanding section 21 and the gradual change section 22 are made of insulating materials, and the reducing section 23 is made of conductive materials and is clamped in the guide pipe hole 11. The diameters of the expanding section 21, the gradual changing section 22 and the reducing section 23 are reduced in sequence. In this embodiment, the diameter-reducing section 23 may be made of a metal material, and the diameter-expanding section 21 and the gradual-changing section 22 are made of a plastic material.
The movable electrode module 3 is mainly used for being in movable contact with the conductive meshes 1 to form a conductive loop, the length of the movable electrode module is the same as that of the running conduit 2, the movable electrode module comprises two electrode sleeves 31, an internode sleeve 32 and a traction rope 33, the internode sleeve 32 is connected between the two electrode sleeves 31, an electrode tentacle 34 is arranged on the electrode sleeve 31, the electrode sleeves 31 and the internode sleeve 32 can be arranged in the conduit hole 11 in a penetrating manner and connected with the traction rope 33, the movable electrode module 3 can be pulled by the traction rope 33 to move in the running conduit 2, and when the movable electrode module 3 moves to a position between two adjacent conductive meshes 1 and the two electrode tentacles 34 are just in contact connection with the reducing section 23, the conductive loop can be formed. In this embodiment, the internode sleeve is made of a non-conductive material.
Preferably, the electrode sleeve 31 includes two metal sleeves 311 and an insulating sleeve 312, the metal sleeves 311 are respectively connected with the electrode lead 35, the insulating sleeve 312 is connected between the two metal sleeves 311, the electrode tentacles 34 are arranged outside the metal sleeves 311 at intervals, the diameter of the electrode sleeve 31 is smaller than the inner diameter of the reducing section 23, the opening height of the electrode tentacles 34 is larger than the inner diameter of the reducing section 23, so that the electrode tentacles 34 can be in close contact with the reducing section 23 when passing through the reducing section 23, and the connection quality is further improved. And, install electrode tentacles 34 on two front and back metal sleeves, can further guarantee the connection reliability when electrode tentacles 34 move to reducing section 23, conveniently judge whether electrode tentacles 34 contact with electrically conductive net piece 1. In this embodiment, the expanding height of the electrode tentacle 34 is smaller than the expanding section 21, and when the electrode tentacle moves from the expanding section to the reducing section 23, the expanding height of the electrode tentacle 34 is gradually compressed under the action of the gradual change section, and finally the electrode tentacle is squeezed and contracted in the reducing section 23 to realize close contact. In this embodiment, the metal sleeve 311, the insulating sleeve 312, and the internode sleeve 32 are all hollow circular tubes with equal diameters, and are connected by threads.
Preferably, the electrode tentacles 34 are elastic claw-shaped cranks facing to the same side, and a plurality of electrode tentacles 34 are alternately and alternately arranged on the circumferential surfaces of the two metal sleeves 311. This configuration can further improve the reliability of the electrode tentacle 34 as it passes through the reduced diameter section 23. In this embodiment, electrode tentacles 34 all towards the drilling bottom, and every metal sleeve 311 homogeneous body shaping is connected with four electrode tentacles 34 to along the hoop interval 90 degrees evenly set up, stagger with 45 degrees angles between the preceding, back row.
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 this embodiment, the hand-held detector 4 body 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 supply circuit 48, a reset circuit 49, a crystal oscillator circuit 410, an audible and visual alarm module 411 and E2A PROM memory module 412, a liquid crystal display module 413 and a data processing module 414. The wiring terminal 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; the signal detection module 47, the power circuit 48, the reset circuit 49, the crystal oscillator circuit 410, the sound and light alarm module 411, E2The PROM memory module 412 and the liquid crystal display module 413 are both connected to the data processing module 414.
Preferably, the change-over switch comprises four gears of 0, 1, 2 and 3. In this embodiment, the "0" range indicates that the power is off, the "1" range indicates that the terminals 1 and 2, 3 and 4 are respectively connected to form the determining circuit, and the "2" range and the "3" range indicate that the terminals 1 and 4, 2 and 3 are respectively connected to form the measuring circuit. In operation, the handle is rotated clockwise in fig. 6 to close or open the contacts in a prescribed sequence. The detection circuit is used for identifying the contact state of the electrode tentacle 34 and the conductive mesh sheet 1. When the LED lamp 43 is lightened and the buzzer alarm 42 sounds, the electrode tentacle 34 is indicated to be in contact with the conductive mesh sheet 1, and a conductive loop capable of measuring resistance is formed; when the LED lamp 43 is dimmed or extinguished and the buzzer alarm 42 does not sound, it indicates that the two are in a separated state. The detection principle is that when the electrode tentacle 34 is not in contact with the reducing section 23, the resistance between the front electrode tentacle and the rear electrode tentacle on the same electrode sleeve 31 is large, so that the current of a detection circuit is too small, the indicator lamp 43 is dim or not bright, and the alarm 42 of the buzzer cannot be driven to generate alarm sound; when the electrode tentacle 34 contacts the reducing section 23, the resistivity is low because both are made of metal, and the indicator light is bright and has a buzzing alarm sound.
Preferably, the signal acquisition circuit 47 is driven to different gears through the change-over switch 44 to form the detection and measurement circuit, the resistance value of each section of grouting material is transmitted to the data processing module 410 for analysis and processing, the data result is displayed on the liquid crystal display 45 after the analysis is finished, and the fullness degree of grouting is automatically judged after the comparison with the standard resistance value. In this embodiment, the 2 and 3 gears measure the resistance of the grouting material of the same section, and the resistance is compared and verified with each other, and the measured data is stored in the handheld detector 4 through the data storage circuit 49, and can be exported through the USB interface 46 at the later stage.
Preferably, the data processing module 414 can use an STC89C52 single chip microcomputer, and adopts I2C communication pair E2The PROM memory module 412 performs data access and realizes information interaction with the liquid crystal display module 413 by UART or CAN communication; the signal detection module 47 includes sampling resistors, voltage dividing circuits, operational amplifiers, auxiliary power supplies, capacitors, and other elements; contact judgment and resistance measurement are carried out by switching to different gears through the change-over switch 42; 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 a standard resistance value to judge the fullness degree of grouting; the measured values and the analysis results are then transmitted to the liquid crystal display module 413 and storedE2A PROM data storage module 412. In this embodiment, the 2 and 3 gears measure the resistance of the grouting material 6 of the same section, the resistance is compared and verified with each other, and the measured data is processed by E2The PROM data storage module 412 is stored in the hand-held test instrument 4 and can be exported later through the USB interface 45.
Preferably, the detection device further comprises a grouting observation assembly 5, the grouting observation assembly 5 comprises a grout stopping plug 51, a flexible water bag 52 and a liquid level pipe 53, the grout stopping plug 51 is arranged on the anchor cable and the rod 7 in a penetrating mode and is located at a separation position of the anchoring section and the free section of the drill hole, grout is prevented from returning out of the flow hole along the drill hole during grouting, and the grout stopping effect is achieved; the flexible water bag 52 is arranged on one side of the grout stop plug 51 close to the outside of the drill hole 6, one end of the liquid level pipe 53 is communicated with the flexible water bag 52, and the other end of the liquid level pipe extends out of the drill hole 6 along the anchor cable and the rod 7. When the wall of the drill hole is not sealed firmly and the grouting of the anchoring section is finished, grouting material flows into the free section from a gap between the grout stop plug 51 and the periphery of the hole wall, the flexible water bag 52 is extruded, so that the liquid level in the liquid level pipe 53 rises, whether the grouting leakage and the grouting overflow occur can be judged according to the rising degree of the liquid level, and the grouting is finished. In this embodiment, the liquid level bag is filled with colored liquid for convenient observation.
In this embodiment, the detection method of the plumpness snap ring type detection device in the anchor cable and rod grouting stage includes the following steps:
s1, before detecting the grouting fullness of the drill hole, preparing a plastic cylinder with the same diameter as the drill hole and the same height as the distance between the conductive meshes (1) in the hole outside the hole, fixing the conductive meshes (1) at the upper end and the lower end, and performing saturated grouting with the slurry with the same property as the grouting material of the drill hole, wherein the resistance value of the slurry is measured by a conventional universal meter to serve as a standard resistance value and is reserved for subsequent comparison. In this embodiment, the electrode leads connected to the front and rear metal sleeves are respectively numbered, for example, 1, 2 and 3, 4, and correspondingly, 4 terminals are marked with different colors, for example, two reds and two yellows, respectively corresponding to the electrode leads 1, 2 and 3, 4.
S2, sleeving the conductive mesh sheets 1 on the anchor cables and the rods 7 at equal intervals, then penetrating the walking guide pipes 2 into the guide pipe holes 11 of two adjacent conductive mesh sheets 1, and sequentially connecting the walking guide pipes 2 with the same drilling length;
s3, placing the movable electrode module 3 at the tail end of the walking catheter 2, winding the front and rear four electrode leads 35 on the traction rope 33, and arranging the electrode leads along the walking catheter 2 to be led out of the hole;
s4, a grouting pipe is arranged in the grouting hole 12 in the conductive mesh 1 in a penetrating mode, and the pipe orifice end and the movable electrode module 3 are located at the bottom end together;
s5, placing an anchor cable and a rod 7 into the borehole together with the conductive mesh 1, the running conduit 2, the movable electrode module 3 and the grouting pipe;
s6, grouting by a hole bottom slurry return method, stopping grouting when the liquid level of the liquid level pipe 53 rises obviously, connecting the 4 electrode leads 35 with the corresponding binding posts 41 of the handheld detector 4 respectively, rotating the change-over switch 44 to 1 gear, and pulling the traction rope 33 towards the hole opening so as to drive the movable electrode module 3 to move slowly;
s7, when the LED alarm lamp 43 and the buzzer alarm 42 detect that the electrode tentacle 34 is in contact with the conductive mesh 1, stopping pulling the movable electrode module 3, sequentially rotating the change-over switch 44 to 2-gear and 3-gear, measuring and recording the resistance value of the grouting material of the section, and displaying the resistance value on the display screen 46;
s8, comparing the measured resistance value of the section with a standard resistance value, and when the measured value is smaller than the standard value, indicating that the section is not filled with grouting material; otherwise, the compactness of the mortar meets the requirement;
and S9, when the detection result shows that the hole is not full, performing secondary grouting, and after the requirement is met, repeating the steps S6-S8 to perform the operation of the next section until the grouting and detection work of the whole drilling hole is completed.
In conclusion, the invention provides a plumpness snap ring type detection device and a detection method for an anchor cable and a rod grouting stage. The device comprises a conductive mesh 1, a walking conduit 2, a movable electrode module 3 and a handheld detector 4, wherein the walking conduit 2 is formed by splicing a plurality of walking sections and comprises an expanding section 21, a gradual change section 22 and a reducing section 23; the movable electrode module 3 consists of a front set of electrode sleeve 31 and a rear set of electrode sleeve 31 which are the same and are connected through an internode sleeve 32, and each set of electrode sleeve consists of two metal sleeves 311, an insulating sleeve 312 and an electrode tentacle 34; the conducting plate is a round metal net piece with a plurality of round holes, and is sleeved on the anchor cable and the rod at equal intervals. In the grouting stage, the movable electrode module 3 is pulled outwards from the bottom of the hole to move section by section, the resistance value of the grouting material is measured by using a conductive loop formed by the diameter-reducing section snap ring structure, and is compared with the standard resistance value in a completely full state, so that the grouting fullness and the hollow position are judged. Therefore, the method overcomes the limitation that the existing method is only suitable for the grouting material after setting and hardening, and realizes the synchronous operation of grouting, grout supplementing and detection.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The utility model provides an anchor rope, pole grout stage plumpness snap ring formula detection device which characterized in that includes:
the plane of the conductive mesh (1) is provided with a conduit hole (11), a grouting hole (12), an anchor bar hole (13), an inner insulating hole (15) and an outer insulating ring (16); the inner insulating ring (15) is annularly arranged on the anchor bar hole (13), the conductive meshes (1) are sleeved on the anchor cable and the rod (7) at intervals through the anchor bar hole (13), and the anchor cable and the rod (7) are positioned in the drill hole (6);
the walking guide pipe (2) is a hollow circular pipe and is formed by sequentially splicing a plurality of walking sections along the axial direction of a drilled hole, the walking sections are arranged between the adjacent conductive meshes (1), the walking sections are respectively an expanding section (21), a gradual change section (22) and a reducing section (23) from the middle part to two sides, the expanding section (21) and the gradual change section (22) are made of insulating materials, and the reducing section (23) is made of conductive materials and is clamped in the guide pipe hole (11);
the length of the movable electrode module is the same as that of the walking section, the movable electrode module comprises two electrode sleeves (31), an internode sleeve (32) and a traction rope (33), the internode sleeve (32) is connected between the two electrode sleeves (31), the electrode sleeves (31) and the internode sleeve (32) can be arranged in the guide pipe hole (11) in a penetrating mode and connected with the traction rope (33), the electrode sleeves (31) comprise two metal sleeves (311) and an insulating sleeve (312), the metal sleeves (31) are respectively connected with an electrode lead (35), the insulating sleeve (312) is connected between the two metal sleeves (311), and an electrode contact (34) is arranged on the electrode sleeve (31);
the hand-held 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), the binding post (41) is connected with the electrode lead (35), the binding post (41) and the change-over switch (44) are 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 sound-light alarm module (411) and the liquid crystal display module (413), the sound and light 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 rope, pole grouting stage fullness snap ring detection device of claim 1, characterized in that, the terminal post is 4, connect with 4 said electrode lead wires (118) of said two electrode assemblies (11), respectively, the change-over switch (42) includes 0 shelves, 1 shelves, 2 shelves and 3 shelves, the 0 shelf represents the power off, the 1 shelf represents that two said electrode lead wires (35) of the same said electrode sleeve (31) are connected with the signal detection module (47), the 2 shelf represents that two said electrode lead wires (35) of said two electrode sleeves (31) are connected with the signal detection module (47), the 3 shelf represents that the other two said electrode lead wires (35) of said two electrode sleeves (31) are connected with the signal detection module (47).
3. The anchor rope and rod grouting stage fullness clasp type detection device according to claim 2, wherein the conductive mesh (1) is a circular metal mesh with a plurality of circular holes, the diameter of the mesh is smaller than that of the drill hole (6), an outer insulating ring (16) is arranged on the periphery of the mesh, and supporting seats (17) are arranged on the outer insulating ring (16) at equal angular intervals along the circumferential direction of the mesh.
4. The anchor rope, pole grouting stage fullness clasp type detection device according to claim 2, characterized in that the electrode tentacles (34) are arranged outside the metal sleeve (311) at circumferential intervals, the diameter of the electrode sleeve (31) is smaller than the inner diameter of the reducing section (23), the expanding height of the electrode tentacles (34) is larger than the inner diameter of the reducing section (23); in a natural state, the electrode tentacles (34) are loosened and opened, and the necking sections (23) are tightened, communicated with a circuit and moved to pass through.
5. The anchor rope, pole grouting stage fullness clasp type detection device of claim 4, characterized in that, the electrode tentacles (34) are claw-shaped cranks facing to the same side, and a plurality of the electrode tentacles are alternately arranged on the circumferential surfaces of the two metal sleeves (311).
6. The anchor line, rod grouting stage fullness clasp detection device of claim 2, characterized in that, the hand-held detector (4) further comprises a power circuit (48), a reset circuit (49), a crystal oscillator circuit (410) and an E2PROM memory module (412) connected to the data processing module (414), and a USB interface (45).
7. The cable bolt, rod stage fullness bail-type detection device of claim 2, characterized by, further comprises slip casting observation subassembly (5), the slip casting observation subassembly includes:
the grout stop plug (51) is used for penetrating the anchor cable and the rod (7) and is positioned at the separation position of the anchoring section and the free section of the drilling hole;
the flexible water bag (52) is arranged on one side of the grout stopping plug (51) close to the outside of the drill hole (6);
one end of the liquid level pipe (53) is communicated with the flexible water bag (52), and the other end of the liquid level pipe extends out of the drill hole (6) along the anchor cable and the rod (7); stopping grouting when the liquid level in the liquid level pipe (53) obviously rises during grouting.
8. The method for detecting the fullness snap ring in grouting stage of anchor cable and rod as claimed in claim 2, wherein the flexible water bag (52) is filled with colored liquid.
9. The detection method of the anchor rope and rod grouting stage fullness clasp type detection device as claimed in any one of claims 2 to 8, comprising the following steps:
s1, before detecting the grouting fullness of the drill hole, preparing a plastic cylinder with the same diameter and height as the drill hole (6) and the same distance between the conductive meshes (1) in the hole outside the hole, fixing the conductive meshes (1) at the upper and lower ends, and performing saturated grouting with slurry with the same property as the grouting material of the drill hole, wherein the resistance value of the slurry is measured by a conventional universal meter and is used as a standard resistance value for subsequent comparison;
s2, sleeving the conductive meshes (1) on the anchor cables and the rods (7) at equal intervals, then penetrating the walking guide pipes (2) into the guide pipe holes of two adjacent conductive meshes, and sequentially connecting to form the walking guide pipes with the same drilling length;
s3, placing the movable electrode module (3) at the tail end of the walking guide pipe (2), winding four electrode leads (35) on the traction rope (33), arranging the electrode leads along the walking guide pipe (2), leading out of holes, and numbering the electrode leads in sequence at the wire ends;
s4, a grouting pipe is arranged in the grouting hole in the conductive net (1) in a penetrating mode, and the pipe orifice end and the movable electrode module (3) are located at the bottom end together;
s5, placing an anchor cable and a rod (7) into a borehole together with the conductive mesh (1), the running conduit (2), the movable electrode module (3) and the grouting pipe;
s6, grouting by a hole bottom slurry return method, stopping grouting when the liquid level of a liquid level pipe (53) rises obviously, connecting the 4 electrode leads (35) with the corresponding binding posts (41) of the handheld detector (4) respectively, rotating a change-over switch (44) to 1 gear, and pulling the traction rope (33) towards the hole opening so as to drive the movable electrode module (3) to move slowly;
s7, when the LED alarm lamp (43) and the buzzer alarm (42) detect that the electrode tentacle (34) is in contact with the conductive mesh (1), stopping pulling the movable electrode module (3), sequentially rotating the change-over switch (44) to 2 gears and 3 gears, measuring and recording the resistance value of the grouting material of the section, and displaying the resistance value on the display screen (46);
s8, comparing the measured resistance value of the section with a standard resistance value, and when the measured value is smaller than the standard value, indicating that the section is not filled with grouting material; otherwise, the compactness of the mortar meets the requirement;
and S9, when the detection result shows that the hole is not full, performing secondary grouting, and after the requirement is met, repeating the steps S6-S8 to perform the operation of the next section until the grouting and detection work of the whole drilling hole is completed.
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