Device for detecting uplift bearing capacity of anchor cable and anchor rod of foundation pit

Abstract

The utility model discloses a device for detecting the uplift bearing capacity of an anchor cable and an anchor rod of a foundation pit. The device for detecting the uplift bearing capacity of the anchor cable and the anchor rod of the foundation pit comprises a supporting assembly, a connecting assembly and a fixing assembly, wherein the supporting assembly can stretch out and draw back up and down in the vertical direction; the connecting assembly is detachably connected to the supporting assembly; the fixing assembly comprises a telescopic rod, a fixing plate, at least two telescopic arms and a reinforcing plate, the telescopic rod is detachably connected to one end of the connecting assembly, the fixing plate is fixedly connected with the telescopic rod, the telescopic arms are detachably connected to the fixing plate, the telescopic arms are detachably provided with dial indicators, and the reinforcing plate is penetrated by an anchor rod or an anchor cable and is connected with measuring heads of the dial indicators in a matched mode. By arranging the reinforcing plate, the sectional areas of the anchor cable and the anchor rod are increased, and the problem that two displacement measuring instruments cannot be installed due to small sections of the anchor cable and the anchor rod is solved; the problems that the measuring head of the dial indicator slides off and detection data is inaccurate due to the fact that the anchor cable and the anchor rod rotate around the center shaft in the loading process are solved through matched connection of the reinforcing plate and the measuring head of the dial indicator.

Description

Technical Field

[0001] The utility model belongs to the technical field of pull-out detection, and particularly relates to a pull-out bearing capacity detection device for foundation pit anchor cables and anchor rods. Background Art

[0002] After the construction is completed, the anchor body (including anchor rods and anchor cables) is hidden and its construction quality cannot be directly seen. As an important evaluation index of the construction quality of the anchor body, the specification requires the testing and evaluation of its bearing capacity. The on-site anchor body pull-out test, including basic test, creep test and acceptance test, as the most direct and effective method of pull-out test, not only provides a basis for design, but also helps to ensure the safety and reliability of construction quality, and make judgments on the construction safety and treatment effect of the entire slope project. At the same time, it is of great significance to evaluate and predict the stability and development trend of the slope, and the accuracy of its test results directly affects the reliability of the safety evaluation of the slope project.

[0003] At present, in the prior art, for example, the Chinese invention patent with publication number CN108918273A discloses an anti-floating anchor pullout test device, which includes a through-core hydraulic jack, a dial indicator, and a through-core steel pad for supporting the through-core hydraulic jack. The through-core hydraulic jack clamps the anti-floating anchor group through a clamp, the dial indicator is fixed on the dial indicator bracket, a reference plate is fixed on the anti-floating anchor, and the force transmission needle of the dial indicator contacts the reference plate to detect the upward movement distance of the anti-floating anchor. It has the advantages of simple equipment, easy operation, and high detection accuracy. The provided through-steel pad forms a strong supporting effect on the through-steel hydraulic jack, avoiding damage to the concrete floor that has been poured on site. The provided lifting lugs are conducive to convenient lifting, and the fixing ring avoids the sliding of the through-steel hydraulic jack, making the detection effect more accurate. In addition, through the divergent waist-shaped holes, the through-steel pad can be suitable for fixing rings of different sizes, and thus suitable for the matching use of through-steel hydraulic jacks of different specifications. However, this device is only suitable for the working condition where the anchor rod is vertical to the ground. If it is a slope support anchor rod, this device cannot be used. The anchor rod is a rigid rod with a certain rigidity, unlike the anchor cable which is a flexible pull wire and has no supporting force. In addition, the cross-sectional area of ​​the anchor rod is small, and two or more dial indicators cannot be installed for simultaneous measurement. The measured data cannot be verified with each other, the accidental error is large, and the reliability is low. During the loading process, the anchor cable and the anchor rod rotate around the central axis, which can easily cause the dial indicator probe to slip, thereby causing errors in the detection data. Summary of the invention

[0004] Based on this, it is necessary to provide a foundation pit anchor cable and anchor rod pull-out bearing capacity detection device in view of the problem that the cross-sectional area of ​​the anchor rod or anchor cable is small, and two or more dial indicators cannot be installed to measure the displacement at the same time. During the loading process, the anchor cable and anchor rod rotate around the force center axis, which can easily cause the dial indicator probe to slip and lead to errors in the detection data.

[0005] In order to achieve the above purpose, the utility model adopts the following scheme:

[0006] A device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods is arranged at the end of the exposed end of the anchor rod or anchor cable, comprising: a supporting assembly, a connecting assembly and a fixing assembly, wherein the supporting assembly can be extended and retracted up and down in the vertical direction; one end of the connecting assembly is detachably connected to one end of the supporting assembly; and the fixing assembly comprises a telescopic rod, a fixing plate, at least two telescopic arms and a reinforcing plate, one end of the telescopic rod is detachably connected to an end of the connecting assembly away from the supporting assembly, the lower end surface of the fixing plate is fixedly connected to the end of the telescopic rod away from the connecting assembly, the telescopic arm is detachably connected to the fixing plate, the end of the telescopic arm away from the fixing plate is detachably provided with a dial indicator, the reinforcing plate is connected to the safety rope of the connecting assembly, and the reinforcing plate is penetrated by the anchor rod or anchor cable and is cooperatively connected to the probe of the dial indicator.

[0007] Preferably, a second fastening bolt is provided on the telescopic rod.

[0008] Preferably, the connecting assembly comprises a transition bolt, the transition bolt is threadedly connected to the supporting assembly, and one end of the transition bolt away from the supporting assembly is threadedly connected to the telescopic rod.

[0009] Preferably, the support assembly includes a plurality of support rods and a connecting sleeve, wherein the connecting sleeve is hinged to one end of the support rod at a lower end surface away from the telescopic rod, and the support rod can rotate clockwise or counterclockwise along the hinge.

[0010] Preferably, the support rod includes a hinged portion and a sliding portion, one end of the hinged portion is hinged to the connecting sleeve, and the sliding portion is slidably connected to the outer wall of the hinged portion and can slide up and down along the outer wall of the hinged portion.

[0011] Preferably, a first fastening bolt is provided at one end of the sliding portion close to the connecting sleeve for fixing the position of the sliding portion.

[0012] Preferably, a pressure plate is provided at one end of the sliding portion away from the connecting sleeve, and a conical column is provided at one end of the sliding portion away from the connecting sleeve.

[0013] Preferably, a level bubble is provided on the connecting sleeve.

[0014] The technical solution adopted in this application can achieve the following beneficial effects:

[0015] By setting a reinforcing plate, the cross-sectional area of ​​the anchor cable and the anchor rod is increased, thereby solving the problem that the cross-sectional area of ​​the anchor cable and the anchor rod is small and two displacement measuring instruments cannot be installed. At the same time, the reinforcing plate is connected with the probe of the dial indicator to solve the problem that the anchor cable and the anchor rod rotate around the central axis during loading, causing the dial indicator probe to slip and the detection data to be inaccurate. By setting independent supporting components and fixing components, the measuring system and the loading system are separated, and the problem of inaccurate displacement measurement is solved. The supporting components and the fixing components are both detachable and connected, which are simple and convenient to install and easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the foundation pit anchor cable and anchor rod pull-out bearing capacity detection device disclosed in the embodiment of the present application.

[0017] Figure 2 This is a schematic diagram of the connection of the foundation pit anchor cable and anchor rod pull-out bearing capacity detection device disclosed in the embodiment of the present application.

[0018] Among them: support assembly 100, support rod 110, hinged part 111, sliding part 112, pressure plate 113, connecting sleeve 120, level bubble 121, connecting assembly 200, adapter bolt 220, fixing assembly 300, telescopic rod 310, fixing plate 320, telescopic arm 330, reinforcing plate 340. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0020] It should be noted that when a device is considered to be "connected" to another device, it may be directly connected to the other device or there may be an intermediate device at the same time. The terms "inside", "top", "upper", "lower", "upper", "lower" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] See also Figure 1 to Figure 2 The present application provides a device for detecting the pull-out bearing capacity of a foundation pit anchor cable and an anchor rod, which is arranged at the end of the exposed end of the anchor rod or the anchor cable, and comprises: a support assembly 100, a connection assembly 200 and a fixing assembly 300, wherein the support assembly 100 can be extended and retracted up and down in the vertical direction; one end of the connection assembly 200 is detachably connected to one end of the support assembly 100; and the fixing assembly 300 comprises a telescopic rod 310, a fixing plate 320, at least two telescopic arms 330 and a reinforcing plate 340, and one end of the telescopic rod 310 is detachably connected to one end of the support assembly 100; Connected to the end of the connecting component 200 away from the supporting component 100, the lower end surface of the fixing plate 320 is fixedly connected to the end of the telescopic rod 310 away from the connecting component 200, the telescopic arm 330 is detachably connected to the fixing plate 320, and the end of the telescopic arm 330 away from the fixing plate 320 is detachably provided with a dial indicator, the reinforcing plate 340 is connected to the safety rope of the connecting component 200, and the reinforcing plate 340 is penetrated by an anchor rod or an anchor cable, and is connected with the probe of the dial indicator.

[0023] Specifically, the support component 100 adopts but is not limited to a support frame with strong stability and easy to extend and retract, such as a triangular bracket and a telescopic riser. The connecting component 200 adopts but is not limited to a hexagonal bolt, a bolt sleeve, etc., which can transfer or connect the support component 100 and the fixing component 300. The telescopic rod 310 adopts a stainless steel pipe and a steel pipe or a stainless steel rod and a steel pipe. If the stainless steel pipe and the steel pipe are matched, the corresponding connecting component 200 adopts a hexagonal bolt, and one end of the telescopic rod 310 is provided with an internal thread. If the telescopic rod 310 is a stainless steel rod and a steel pipe, the connecting component 200 adopts a bolt sleeve, and one end of the stainless steel rod is provided with an external thread. The telescopic rod 310 and one end of the connecting component 200 can be detached by the thread. Unscrew connection; the end of the telescopic rod 310 away from the connecting component 200 is fixedly connected to the fixed plate 320, and the fixed plate is made of but not limited to square steel, square tube, round tube, etc. A plurality of telescopic arms 330 are arranged on the fixed plate 320, and the telescopic arms 330 are respectively arranged at both ends and one side of the fixed plate 320. The end of the telescopic arm 330 away from the fixed plate 320 is detachably connected to a dial indicator, and the telescopic arm 330 adopts a bracket for fixing the dial indicator similar to a magnetic base. The reinforcing plate 340 is connected to the side wall of the connecting component 200 by ropes such as but not limited to wire ties and iron wires to prevent the loss of the reinforcing plate 340, and the reinforcing plate 340 uses a plate with a cross-sectional area larger than the cross-sectional area of ​​the fixed plate 320, and the probe of the dial indicator contacts one side of the reinforcing plate 340.

[0024] When testing the pull-out bearing capacity of the anchor rod or anchor cable, stand the support assembly 100 directly in front of the exposed end of the anchor rod or anchor cable, and install it on the anchor rod or anchor cable in the order of pad, through-type jack, reinforcement plate 340, and tool anchor, connect one end of the connecting assembly 200 to the supporting assembly 100, and connect the other end of the connecting assembly 200 to the telescopic rod 310, and connect the connecting assembly 200, the supporting assembly 100, the telescopic rod 310 and the fixing plate 320 as a whole and fix them on the ground, fix the calibrated dial indicator on the telescopic arm 330, adjust the telescopic arm 330 so that the probe of the dial indicator contacts the reinforcement plate 340, and record the value of each dial indicator. After the test, record the value of the dial indicator and remove the dial indicator, and remove the fixing assembly 300, the connecting assembly 200 and the supporting assembly 100 in turn.

[0025] The technical solution adopted in this application can achieve the following beneficial effects:

[0026] By providing a reinforcing plate 340, the cross-sectional area of ​​the anchor cable and the anchor rod is increased, thereby solving the problem that the cross-sectional area of ​​the anchor cable and the anchor rod is small and two displacement measuring instruments cannot be installed. At the same time, the reinforcing plate 340 is connected with the probe of the dial indicator to solve the problem that the anchor cable and the anchor rod rotate around the central axis during loading, causing the probe of the dial indicator to slip and the detection data to be inaccurate. By providing an independent supporting assembly 100 and fixing assembly 300, the measuring system and the loading system are separated, and the problem of inaccurate displacement measurement is solved. The supporting assembly 100 and the fixing assembly 300 are both detachably connected, which is simple and convenient to install and easy to carry.

[0027] Based on the above solution, a second fastening bolt is provided on the telescopic rod 310. For example, the telescopic rod 310 is divided into an outer tube and an inner tube, one end of the outer tube is threadedly connected to the connecting assembly 200, the inner tube slides up and down along the inner wall of the outer tube, and a threaded hole is provided at one end of the outer tube away from the connecting assembly 200, the second fastening bolt extends into the threaded hole and squeezes the inner tube, so that the inner tube stops rising or sliding down at a required height, and at the same time, by rotating the direction of the inner tube, the direction of the fixing plate 320 is adjusted so that it faces the anchor rod or anchor cable, and after the height and direction are adjusted, the inner tube is fixed by adjusting the second fastening bolt, and the operation is simple and convenient.

[0028] In a preferred solution, the connection assembly 200 includes an adapter bolt 220, the adapter bolt 220 is threadedly connected to the support assembly 100, and one end of the adapter bolt 220 away from the support assembly 100 is threadedly connected to the telescopic rod 310. For example, both ends of the adapter bolt 220 are external threads, one end of the outer tube of the telescopic rod 310 is provided with an internal thread, one end of the adapter bolt 220 is threadedly connected to one end of the support assembly 100 by rotation, and the other end of the adapter bolt 220 is threadedly connected to the outer tube of the telescopic rod 310, and the support assembly 100 is connected to the telescopic rod 310 by the adapter bolt 220, which makes installation simpler and more convenient, and more firm and stable.

[0029] Furthermore, the support assembly 100 includes a plurality of support rods 110 and a connecting sleeve 120. The connecting sleeve 120 is hinged to one end of the support rod 110 at a lower end surface away from the telescopic rod 310, and the support rod 110 can rotate clockwise or counterclockwise along the hinge. For example, a threaded hole matching the adapter bolt 220 is provided at the center of the connecting sleeve 120, and three support rods 110 are provided at one end of the connecting sleeve 120 away from the adapter bolt 220. The support rods 110 are evenly arranged around the center of the connecting sleeve 120 and are hinged to the connecting sleeve 120. By opening the three support rods 110 in all directions and fixing them on the ground, the entire support assembly 100 is made more stable, and the problem of reduced stability and easy tipping caused by the telescopic rod 310 being too high is avoided.

[0030] Based on the above solution, the support rod 110 includes a hinged portion 111 and a sliding portion 112. One end of the hinged portion 111 is hinged to the connecting sleeve 120. The sliding portion 112 is slidably connected to the outer wall of the hinged portion 111 and can slide up and down along the outer wall of the hinged portion 111. A through hole is provided at one end of the hinged portion 111 close to the connecting sleeve 120. A bolt passes through the through hole and is rotatably connected to one end of the connecting sleeve 120, thereby realizing the flipping of the hinged portion 111. The sliding portion 112 slides up and down along the outer wall of the hinged portion 111. By adjusting the sliding position of the sliding portion 112, the height of the connecting sleeve 120 to the ground is increased, thereby solving the problem that the height of the anchor rod or anchor cable relative to the ground is too high and the telescopic height of the telescopic rod 310 is insufficient to meet the detection.

[0031] Furthermore, a first fastening bolt is provided at one end of the sliding portion 112 close to the connecting sleeve 120, for fixing the sliding position of the sliding portion 112. The length of the hinged portion 111 is nine tenths of the length of the sliding portion 112. By providing a threaded hole at one end of the sliding portion 112 close to the connecting sleeve 120, the first fastening bolt extends into the threaded hole and angles the hinged portion 111, so that it does not slide down any more.

[0032] Specifically, a pressing plate 113 is provided at one end of the sliding part 112 away from the connecting sleeve 120, and a conical column is provided at one end of the sliding part 112 away from the connecting sleeve 120, and a level bubble 121 is provided on the connecting sleeve 120. By adjusting the height of the sliding part 112 and the flip angle of the hinged part 111, the bubble is centered, thereby ensuring that the end of the connecting sleeve 120 away from the support rod 110 remains horizontal, and the end of the sliding part 112 away from the connecting sleeve 120 adopts an iron conical columnar tip, so that the sliding part 112 can be inserted into the ground, thereby improving the stability of the support assembly 100, and by stepping on the pressing plate 113 with a foot, it is more convenient to insert one end of the sliding part 112 into the ground, and the depth is increased, thereby improving stability and making the operation more convenient.

[0033] The above-described embodiments only express the way of equipment layout of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application; it should be pointed out that for ordinary technicians in this field, several adjustments and improvements can be made without departing from the concept of the present application, which all belong to the scope of protection of the present application; therefore, the scope of protection of the patent of this application shall be based on the attached claims.

Claims

1. A device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods, arranged at the end of the exposed end of the anchor rod or anchor cable, comprising: A support assembly, wherein the support assembly can be extended and retracted up and down in a vertical direction; A connecting assembly, one end of which is detachably connected to one end of the supporting assembly; as well as A fixing assembly, the fixing assembly comprising a telescopic rod, a fixing plate, at least two telescopic arms and a reinforcing plate, one end of the telescopic rod being detachably connected to the end of the connecting assembly away from the supporting assembly, the lower end surface of the fixing plate being fixedly connected to the end of the telescopic rod away from the connecting assembly, the telescopic arm being detachably connected to the fixing plate, the end of the telescopic arm away from the fixing plate being detachably provided with a dial indicator, the reinforcing plate being connected to the safety rope of the connecting assembly, and the reinforcing plate being penetrated by an anchor rod or an anchor cable, and being connected in cooperation with the probe of the dial indicator.

2. The device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods as claimed in claim 1, characterized in that: The telescopic rod is provided with a second fastening bolt.

3. The device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods according to claim 1, characterized in that: The connecting assembly comprises a transfer bolt, the transfer bolt is threadedly connected to the supporting assembly, and one end of the transfer bolt away from the supporting assembly is threadedly connected to the telescopic rod.

4. The device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods according to claim 1, characterized in that: The support assembly includes a plurality of support rods and a connecting sleeve. The connecting sleeve is hinged to one end of the support rod at a lower end surface away from the telescopic rod. The support rod can rotate clockwise or counterclockwise along the hinge.

5. The device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods as claimed in claim 4, characterized in that: The support rod comprises a hinged portion and a sliding portion, one end of the hinged portion is hinged to the connecting sleeve, and the sliding portion is slidably connected to the outer wall of the hinged portion and can slide up and down along the outer wall of the hinged portion.

6. The device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods as claimed in claim 5, characterized in that: A first fastening bolt is provided at one end of the sliding part close to the connecting sleeve for fixing the position of the sliding part.

7. The device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods as claimed in claim 6, characterized in that: A pressing plate is arranged at one end of the sliding part away from the connecting sleeve, and a conical column is arranged at one end of the sliding part away from the connecting sleeve.

8. The device for detecting the pull-out bearing capacity of foundation pit anchor cables and anchor rods as claimed in claim 4, characterized in that: A level bubble is arranged on the connecting sleeve.

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