Efficient detection device based on in-service anchor cable prestress detection

Abstract

The utility model discloses an efficient detection device based on in-service anchor cable prestress detection, and relates to the technical field of landslide prevention and control engineering detection. A plurality of anchor cable steel strands are arranged on an anchorage pier, exposed sections of the anchor cable steel strands are connected to one end of a steel strand connector, the other end of the steel strand connector is connected with a detection steel strand, the detection steel strand penetrates through a center hole of an anchor cable dynamometer, and a displacement sensor corresponds to the anchor cable dynamometer in position. The displacement sensor is installed on the hand-operated drawing instrument, horizontal drawing of the steel strand is detected by shaking the hand-operated drawing instrument, and the anchor cable dynamometer and the displacement sensor are both electrically connected with the data acquisition analyzer. According to the utility model, a hand-operated drawing instrument and a single tensioning mode are adopted, so that the weight of detection equipment is reduced, the weight of a single part does not exceed 15kg, the device is suitable for high slope anchoring engineering detection, the movement and position adjustment of the detection device are facilitated, and the improvement of detection efficiency is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of landslide prevention and control engineering detection, in particular to a high-efficiency detection device based on in-service anchor cable prestress detection. Background Art

[0002] As a commonly used landslide reinforcement project, a large number of anchor cables have been in service for many years. How are their operating conditions during service and how much risk they pose to landslide stability are difficult problems that need to be solved urgently. Because anchor cables are concealed projects, their parameters are often difficult to obtain, especially the effective prestress under the anchor.

[0003] A Chinese patent application with application number 201910184217.5 discloses a front-end anchor cable steel strand displacement detection device based on the reverse pulling method, including a limiting cylinder provided with a center hole, and a stretching detection device for detecting the stretching amount of the anchor cable steel strand. The center hole is used to pass the anchor cable steel strand, and the stretching detection device is installed on the limiting cylinder. The inspection point of the stretching detection device is located at the end of the limiting cylinder used to interact with the anchor.

[0004] Although the above detection device discloses the technology of detecting the prestress of anchor cable steel strand by the reverse pulling method, the detection device used is relatively heavy, usually weighing more than 200kg, which is difficult to be generally applied in the detection of high slope anchoring projects. It is not convenient to move and adjust the detection device, and is not conducive to improving the detection efficiency. To this end, we provide an efficient detection device based on the detection of prestress of in-service anchor cables to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide an efficient detection device based on the detection of prestressed anchor cables in service. Through the specific design of anchor cable dynamometers, displacement sensors, hand-cranked pullers, data acquisition and analysis instruments, steel strand connectors and sensor auxiliary plates, the utility model solves the problems that the existing detection devices are relatively bulky, usually weighing more than 200kg, are difficult to be generally used in the detection of high slope anchoring projects, are inconvenient to move and adjust the detection devices, and are not conducive to improving the detection efficiency.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a high-efficiency detection device based on the detection of prestress of in-service anchor cables, comprising an anchor pier, on which a plurality of anchor cable steel strands are arranged, the anchor cable steel strands are divided into an anchoring section, a free section and an exposed section, the anchoring section and the free section of the anchor cable steel strands are both arranged in holes on the anchor pier, the exposed section of the anchor cable steel strands is arranged outside the anchor pier, and the anchoring section of the anchor cable steel strands is integrated with the anchor pier structure.

[0008] The high-efficiency detection device also includes an anchor dynamometer, a displacement sensor, a hand-cranked puller and a data acquisition and analysis instrument; wherein, the exposed section of the anchor steel strand on the anchor pier is connected to one end of the steel strand connector, and the other end of the steel strand connector is connected to a detection steel strand, and the detection steel strand passes through the center hole on the anchor dynamometer, and the anchor dynamometer is used to detect the prestress value of the detection steel strand at its corresponding position when it is pulled.

[0009] The displacement sensor corresponds to the position of the anchor dynamometer, and is used to detect the total steel strand deformation during pulling; the displacement sensor is fixedly mounted on the hand-cranked puller, and the horizontal pulling action of the detection steel strand is achieved by shaking the hand-cranked puller; the anchor dynamometer and the displacement sensor are both electrically connected to the data acquisition and analysis instrument, the prestressed data detected by the anchor dynamometer is transmitted to the data acquisition and analysis instrument, and the total steel strand deformation of the detection steel strand detected by the displacement sensor is transmitted to the data acquisition and analysis instrument.

[0010] The utility model is further configured such that the efficient detection device also includes a working anchor and a steel strand clip; wherein the working anchor is installed and fixed on the anchor pier, the steel strand clip is fixedly arranged on the working anchor and corresponds one-to-one to the anchor cable steel strand, and the free section of the anchor cable steel strand is connected to the corresponding steel strand clip.

[0011] The utility model is further configured such that the high-efficiency detection device also includes a detection position adjustment component fixedly mounted on the working anchor, and the detection position adjustment component is provided with a support component that can move along the length direction of the working anchor; wherein, the support component includes a U-shaped tripod, an inner support plate is fixedly provided on the inner side of the U-shaped tripod, a threaded hole is provided on the inner support plate, the two threaded holes are coaxially arranged, a positioning seat is provided on the surface of the U-shaped tripod, and the detection steel strand passes through the center hole of the positioning seat.

[0012] The utility model is further configured that the anchor dynamometer is arranged between the U-shaped tripod and the hand-cranked puller, and the side of the anchor dynamometer away from the hand-cranked puller is attached to the side wall of the U-shaped tripod.

[0013] The utility model is further configured that a sensing auxiliary plate is provided on one side of the U-shaped support frame close to the anchor dynamometer, one end of the displacement sensor is against the surface of the sensing auxiliary plate, and the displacement sensor measures the total deformation of the steel strand when the steel strand is pulled for inspection by detecting the horizontal distance between the displacement sensor and the sensing auxiliary plate.

[0014] The utility model is further configured such that the detection position control component includes a detection position control base plate fixed on the working anchor by bolts, the U-shaped tripod is slidably arranged on the detection position control base plate, a detection position control screw is rotatably arranged on a fixed plate on the surface of the detection position control base plate, and the detection position control screw is threadedly matched with the threaded hole.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model adopts a hand-cranked pulling instrument and a single-root tensioning mode, which not only reduces the weight of the detection equipment, but also makes the weight of a single component not exceed 15kg. It is suitable for the detection of high-slope anchoring projects, facilitates the movement and adjustment of the detection device, and is conducive to improving the detection efficiency.

[0017] 2. The utility model installs a detection position regulating component on the working anchor, and slides the support component on the detection position regulating component. After completing the prestressing detection of one anchor cable steel strand, the detection position regulating screw is rotated and the threaded cooperation between the detection position regulating screw and the inner support plate is utilized to drive the U-shaped support frame to move to the next anchor cable steel strand. The same installation and detection method is used to realize the prestressing detection of the next anchor cable steel strand, which is beneficial to improving the mobile adjustment detection efficiency of the detection device.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of an efficient detection device based on prestress detection of in-service anchor cables.

[0021] Figure 2 It is a structural schematic diagram of the support assembly in the utility model.

[0022] Figure 3 Schematic diagram of the principle of smooth curve reverse pulling method.

[0023] Figure 4 This is an analysis chart of indoor test data of the smooth curve reverse pulling method.

[0024] Figure 5 It is a schematic diagram of the principle of the steep drop curve reverse pulling method.

[0025] Figure 6 This is an analysis chart of indoor test data of the steep drop curve reverse pulling method.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1-anchor pier, 2-anchor cable steel strand, 3-anchor cable dynamometer, 4-displacement sensor, 5-hand-cranked puller, 6-data acquisition and analysis instrument, 7-working anchor, 8-steel strand clip, 9-steel strand connector, 10-U-shaped support bracket, 11-threaded hole, 12-positioning seat, 13-sensing auxiliary plate, 14-detection steel strand, 15-detection position adjustment component, 16-support component, 17-detection position adjustment base plate, 18-detection position adjustment screw, 19-inner support plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-6 The utility model is a high-efficiency detection device based on the detection of prestress of in-service anchor cables, comprising an anchor pier 1, on which a plurality of anchor cable steel strands 2 are arranged, the anchor cable steel strands 2 are divided into an anchoring section, a free section and an exposed section, the anchoring section and the free section of the anchor cable steel strands 2 are both arranged in a hole on the anchor pier 1, the exposed section of the anchor cable steel strands 2 is arranged outside the anchor pier 1, and the anchoring section of the anchor cable steel strands 2 is integrated with the anchor pier 1 structure;

[0030] The high-efficiency detection device also includes an anchor dynamometer 3, a displacement sensor 4, a hand-cranked puller 5 and a data acquisition analyzer 6; wherein, the exposed section of the anchor steel strand 2 on the anchor pier 1 is connected to one end of the steel strand connector 9, and the other end of the steel strand connector 9 is connected to a detection steel strand 14, and the anchor steel strand 2, the steel strand connector 9 and the detection steel strand 14 are subjected to tension test as a whole, and the detection steel strand 14 passes through the center hole on the anchor dynamometer 3, and the anchor dynamometer 3 is used to detect the prestress value F of the detection steel strand 14 at its corresponding position when it is pulled (the anchor dynamometer 3 uses the XH series, purchased from Changsha Xianghao Electronic Instrument Factory);

[0031] The displacement sensor 4 corresponds to the position of the anchor cable dynamometer 3, and is used to detect the total steel strand deformation S during pulling (the displacement sensor 4 adopts the distance measurement principle in the form of laser, and the BL series of Boyi Precision Technology is selected). The total steel strand deformation is the sum of the free segment deformation of the anchor cable steel strand 2, the exposed segment deformation of the anchor cable steel strand 2 and the deformation of the detection steel strand 14; the displacement sensor 4 is fixedly installed on the hand-cranked pulling instrument 5, and the horizontal pulling action of the detection steel strand 14 is realized by shaking the hand-cranked pulling instrument 5. The hand-cranked pulling instrument 5 can use a jack;

[0032] The anchor dynamometer 3 and the displacement sensor 4 are both electrically connected to the data acquisition and analysis instrument 6. The prestress data detected by the anchor dynamometer 3 is transmitted to the data acquisition and analysis instrument 6, and the total steel strand deformation of the detection steel strand 14 detected by the displacement sensor 4 is transmitted to the data acquisition and analysis instrument 6; the collected prestress value F and the total steel strand deformation S are analyzed and processed by the data acquisition and analysis instrument 6 to obtain a curve of the prestress changing with the total steel strand deformation S, and then the finite prestress value is obtained by analyzing the change curve (the data acquisition and analysis instrument 6 includes a circuit board and analysis software. The circuit board uses ADS1232 strain gauge acquisition board | 24-bit ADC | strain gauge acquisition board, which is purchased from Dalian Tianqi Electronic Technology Co., Ltd. The analysis software used is the anchor prestress detection system V1.0, which has been declared for software copyright protection, and the registration number is 2023SR0327199).

[0033] In this embodiment of the utility model, the efficient detection device also includes a working anchor 7 and a steel strand clamp 8; wherein, the working anchor 7 is installed and fixed on the anchor pier 1, the steel strand clamp 8 is fixedly arranged on the working anchor 7 and corresponds one-to-one to the anchor cable steel strand 2, and the free section of the anchor cable steel strand 2 is connected to the corresponding steel strand clamp 8.

[0034] In this embodiment of the utility model, the high-efficiency detection device also includes a detection position adjustment component 15 fixedly mounted on the working anchor 7, and the detection position adjustment component 15 is provided with a support component 16 that can move along the length direction of the working anchor 7; wherein, the support component 16 includes a U-shaped tripod 10, an inner support plate 19 is fixedly arranged on the inner side of the U-shaped tripod 10, and a threaded hole 11 is arranged on the inner support plate 19, and the two threaded holes 11 are coaxially arranged, and a positioning seat 12 is arranged on the surface of the U-shaped tripod 10, and the detection steel strand 14 passes through the center hole of the positioning seat 12.

[0035] In this embodiment of the utility model, the anchor dynamometer 3 is arranged between the U-shaped tripod 10 and the hand-cranked puller 5, and the side of the anchor dynamometer 3 away from the hand-cranked puller 5 is attached to the side wall of the U-shaped tripod 10.

[0036] In this embodiment of the utility model, a sensing auxiliary plate 13 is provided on one side of the U-shaped support frame 10 close to the anchor dynamometer 3, and one end of the displacement sensor 4 is against the surface of the sensing auxiliary plate 13. The displacement sensor 4 measures the total steel strand deformation S when the steel strand 14 is pulled out for inspection by detecting the horizontal distance between it and the sensing auxiliary plate 13.

[0037] In this embodiment of the utility model, the detection position adjustment component 15 includes a detection position adjustment substrate 17 fixed to the working anchor 7 by bolts, the U-shaped tripod 10 is slidably set on the detection position adjustment substrate 17, and a detection position adjustment screw 18 is rotatably set on the fixed plate on the surface of the detection position adjustment substrate 17, and the detection position adjustment screw 18 is threadedly matched with the threaded hole 11.

[0038] The working principle of this embodiment is as follows: when in use, the exposed section of the anchor cable steel strand 2 on the anchor pier 1 is connected to one end of the steel strand connector 9, and the other end of the steel strand connector 9 is connected to a detection steel strand 14, and the detection steel strand 14 is passed through the center hole of the anchor cable dynamometer 3, and then the detection position control component 15 is installed and fixed on the working anchor 7 by a fastener, and the fastener can be an M8 screw, and then the anchor cable dynamometer 3, the hand-cranked puller 5 and the displacement sensor 4 and other components are installed in sequence to realize the installation of the entire detection device at a single anchor cable steel strand 2, and the detection steel strand 14 is realized by shaking the hand-cranked puller 5. The horizontal pulling action of the strand 14 realizes the tensioning operation of the single anchor cable strand 2 at the corresponding position. In this process, the anchor cable dynamometer 3 sends the detected prestress value to the data acquisition analyzer 6, and the displacement sensor 4 sends the detected total steel strand deformation S to the data acquisition analyzer 6. The prestress data is analyzed by the data acquisition analyzer 6. Specifically, the obtained curve is a smooth curve or a steep drop curve. If the curve is a smooth curve, find the slope mutation point on the FS curve, extend the two straight lines AB and CD, and their intersection S is the finite prestress under the anchor (such as Figure 3 As shown), if the curve is a steep drop curve, find the prestress sudden drop point on the FS curve, and take the low point C as the finite prestress under the anchor (as shown Figure 5 As shown), the above analysis process is implemented by the analysis software on the data acquisition and analysis instrument 6.

[0039] After completing the prestress test of the anchor cable steel strand 2 at one positioning position, by rotating the detection position adjusting screw 18 and utilizing the threaded cooperation between the detection position adjusting screw 18 and the inner support plate 19, the U-shaped support frame 10 is driven to move to the next anchor cable steel strand 2, and the same installation and testing method is used to implement the prestress test of the next anchor cable steel strand 2.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An efficient detection device based on in-service anchor cable prestress detection, comprising an anchor pier (1), wherein a plurality of anchor cable steel strands (2) are arranged on the anchor pier (1), wherein the anchor cable steel strands (2) are divided into an anchoring section, a free section and an exposed section, wherein the anchoring section and the free section of the anchor cable steel strands (2) are both arranged in a hole on the anchor pier (1), and the exposed section of the anchor cable steel strands (2) is arranged outside the anchor pier (1), and the anchoring section of the anchor cable steel strands (2) is arranged integrally with the anchor pier (1) structure; characterized in that: The high-efficiency detection device also includes an anchor dynamometer (3), a displacement sensor (4), a hand-cranked puller (5) and a data acquisition and analysis instrument (6); The exposed section of the anchor cable steel strand (2) on the anchor pier (1) is connected to one end of a steel strand connector (9), and the other end of the steel strand connector (9) is connected to a detection steel strand (14), and the detection steel strand (14) passes through a central hole on the anchor cable dynamometer (3), and the anchor cable dynamometer (3) is used to detect the prestress value of the detection steel strand (14) at its corresponding position when it is pulled; The displacement sensor (4) corresponds to the position of the anchor cable dynamometer (3), and is used to detect the total deformation of the steel strand during pulling; the displacement sensor (4) is fixedly mounted on the hand-cranked pulling instrument (5), and the horizontal pulling action of the steel strand (14) is detected by shaking the hand-cranked pulling instrument (5); The anchor cable dynamometer (3) and the displacement sensor (4) are both electrically connected to the data acquisition and analysis instrument (6); the prestressing data detected by the anchor cable dynamometer (3) are transmitted to the data acquisition and analysis instrument (6); and the total steel strand deformation of the detection steel strand (14) detected by the displacement sensor (4) is transmitted to the data acquisition and analysis instrument (6).

2. The high-efficiency detection device based on the prestress detection of in-service anchor cables according to claim 1 is characterized in that: The high-efficiency detection device also includes a working anchor (7) and a steel strand clamp (8); wherein the working anchor (7) is mounted and fixed on the anchor pier (1), the steel strand clamp (8) is fixedly arranged on the working anchor (7) and corresponds one-to-one with the anchor cable steel strand (2), and the free section of the anchor cable steel strand (2) is connected to the corresponding steel strand clamp (8).

3. The high-efficiency detection device based on the prestress detection of in-service anchor cables according to claim 2 is characterized in that: The high-efficiency detection device further comprises a detection position regulating component (15) fixedly mounted on the working anchor (7), wherein the detection position regulating component (15) is provided with a support component (16) movable along the length direction of the working anchor (7); The support assembly (16) comprises a U-shaped support frame (10), an inner support plate (19) is fixedly arranged on the inner side of the U-shaped support frame (10), a threaded hole (11) is arranged on the inner support plate (19), and the two threaded holes (11) are arranged coaxially, a positioning seat (12) is arranged on the surface of the U-shaped support frame (10), and the detection steel strand (14) passes through the center hole of the positioning seat (12).

4. The high-efficiency detection device based on the detection of prestress of in-service anchor cables according to claim 3 is characterized in that: The anchor dynamometer (3) is arranged between the U-shaped support frame (10) and the hand-cranked puller (5), and the side of the anchor dynamometer (3) away from the hand-cranked puller (5) is attached to the side wall of the U-shaped support frame (10).

5. The high-efficiency detection device based on the detection of prestress of in-service anchor cables according to claim 4 is characterized in that: A sensing auxiliary plate (13) is provided on one side of the U-shaped support frame (10) close to the anchor dynamometer (3), one end of the displacement sensor (4) is against the surface of the sensing auxiliary plate (13), and the displacement sensor (4) measures the total deformation of the steel strand (14) when the steel strand (14) is pulled for testing by detecting the horizontal distance between the displacement sensor (4) and the sensing auxiliary plate (13).

6. The high-efficiency detection device based on the prestress detection of in-service anchor cables according to claim 5 is characterized in that: The detection position regulating component (15) comprises a detection position regulating base plate (17) fixed to the working anchor (7) by bolts, the U-shaped support frame (10) is slidably arranged on the detection position regulating base plate (17), a detection position regulating screw rod (18) is rotatably arranged on a fixed plate on the surface of the detection position regulating base plate (17), and the detection position regulating screw rod (18) is threadedly matched with the threaded hole (11).

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