Concrete wall deformation detection device and measurement method thereof

Abstract

The present invention discloses a concrete wall deformation detection device and a measurement method thereof. The concrete wall deformation detection device comprises a measuring block, a measuring rod, a sliding rod, a laser horizontal rangefinder, a fixed bracket, a fixture and a strain-displacement measurement system. One end of the sliding rod is inserted into a hole of a concrete wall to be measured and fixedly connected to the measuring block. The other end of the sliding rod is connected to a measuring rod. The hole size is larger than the external size of the sliding rod. The fixture is installed on the outer surface of the concrete wall to be measured. The fixture has a through hole for the measuring rod to pass through and support it. The strain-displacement measurement system comprises at least 4 displacement sensors installed on the surfaces of the measuring rod and the sliding rod and a strain-displacement data collector. The laser horizontal rangefinder is installed on the fixed bracket. The distance between the fixed bracket and the end face of the measuring rod is 2m to 3m. The concrete wall deformation detection device has a simple structure, convenient operation and high measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete deformation measurement, and in particular to a concrete wall deformation detection device and a measurement method thereof. Background Art

[0002] After the concrete wall is poured, due to the release of cement hydration heat and the effect of pressure, some parts of the wall shrink and expand, and the local concrete inside the wall shifts and deforms, which affects the later bearing capacity of the concrete wall. Existing technologies, such as DIC scanning and stress-strain measurement, can reflect the strain conditions on the surface of the concrete wall and below, but cannot measure the deformation changes of concrete at specific locations inside the concrete wall. In addition, the overall cost of the device is expensive and the installation is complicated. It requires a high level of technical skills of the inspection personnel and is not suitable for large-scale promotion and use on construction sites.

[0003] The existing concrete wall deformation detection method has complex deformation measurement operations for concrete walls, requires multiple adjustments of bolts, is prone to deviations in measurement data, and has certain technical requirements for measurement personnel. Summary of the invention

[0004] The main purpose of the present invention is to provide a concrete wall deformation detection device and a measurement method thereof which have a simple structure, are easy to operate and have high measurement accuracy.

[0005] To achieve the above object, the present invention provides a concrete wall deformation detection device, including a measuring block, a measuring rod, a sliding rod, a laser horizontal rangefinder, a fixed bracket, a fixture and a strain-displacement measurement system, wherein:

[0006] The measuring block is fixed inside the concrete wall to be measured to sense its stress changes. One end of the sliding rod is inserted into the hole of the concrete wall to be measured and fixedly connected to the measuring block. The other end of the sliding rod is connected to the measuring rod. The hole size is larger than the external size of the sliding rod. The fixture is installed on the outer surface of the concrete wall to be measured. The fixture has a through hole for the measuring rod to pass through and support it. The strain-displacement measurement system includes at least 4 displacement sensors installed on the surfaces of the measuring rod and the sliding rod and a strain-displacement data collector connected to the displacement sensors. The laser horizontal rangefinder is installed on a fixed bracket. The distance between the fixed bracket and the end face of the measuring rod is 2m to 3m.

[0007] Preferably, the measuring rod and the sliding rod are detachably connected, and the installation distance between the measuring rod and the sliding rod is adjustable.

[0008] Preferably, a socket is provided on one end of the measuring rod, the end of the sliding rod is inserted into the socket, waist-shaped holes are provided on the sliding rod and the side wall of the socket, and bolts pass through the side wall of the socket and the sliding rod to detachably connect the sliding rod and the measuring rod.

[0009] Preferably, it also includes wind shields located on both sides of the measuring rod and the sliding rod.

[0010] Preferably, the installation height of the laser horizontal rangefinder on the fixed bracket is adjustable.

[0011] Preferably, the laser horizontal rangefinder is mounted on a fixed bracket via a fixing device.

[0012] Preferably, the measuring rod is 3 to 5 m long, and the sliding rod is 10 to 30 cm long.

[0013] Preferably, the measuring block is provided with a threaded hole inside and is a cubic structure outside, and the measuring block is threadedly connected to the sliding rod.

[0014] The present invention further proposes a measurement method based on the above concrete wall deformation detection device, comprising the following steps:

[0015] Select a suitable measuring block according to the size of the reserved hole on the concrete wall to be measured. After fixing the measuring block to the sliding rod, insert the head of the sliding rod into the hole, fix the end of the measuring rod to the fixture, and pass the sliding rod through the center of the fixture and lock it with the inner ring of the measuring rod and fix it;

[0016] The distance from the center of the measuring block to the center of the fixture is L1, and the first displacement sensor is installed at L1 / 2. The distance from the center of the fixture to the end of the measuring rod is L2, and the second displacement sensor, the third displacement sensor and the fourth displacement sensor are installed at L2 / 4, L2 / 2 and 3L2 / 4 respectively;

[0017] Install the laser horizontal distance meter on a fixed bracket so that the laser emission point of the laser horizontal distance meter is level with the end center of the measuring rod. Use the laser horizontal distance meter to measure the horizontal distance from the laser emission point to the concrete wall as L3, and the horizontal distance from the laser emission point to the end face of the measuring rod as L4.

[0018] After the preset time, detect the displacement changes monitored by the four displacement sensors, move the laser horizontal rangefinder up and down to make the laser emission point flush with the center of the end face of the measuring rod, and measure the horizontal distance from the laser emission point to the end face of the measuring rod 3 after the change as L5;

[0019] Substitute the displacement changes monitored by L1, L2, L3, L4, L5 and the four displacement sensors into the wall deformation calculation formula to calculate the wall deformation.

[0020] Preferably, the wall deformation calculation formula is:

[0021] x = L1 sinθ,

[0022] Among them, x is the wall deformation, θ is the average value of θ1 and θ2, s1, s2, s3, and s4 are displacement change values ​​of the first displacement sensor to the fourth displacement sensor respectively.

[0023] The concrete wall deformation detection device proposed by the present invention has the following beneficial effects:

[0024] 1. The concrete wall deformation detection device has a simple installation process and is easy to operate. It can measure the deformation changes of different positions of the concrete wall in the same facade by adjusting the height of the laser horizontal rangefinder, and its measurement accuracy is high;

[0025] 2. This concrete wall deformation detection device can move the measuring block to different depths of the wall by adjusting the length of the sliding rod, measure the deformation inside the concrete wall at multiple points, and determine the deformation conditions of multiple points inside the wall;

[0026] 3. This concrete wall deformation detection device can accurately measure the deformation of the concrete wall. By integrating the measurement data of the laser horizontal rangefinder and the monitoring data of the strain-displacement measurement system, it can reasonably analyze the local deformation of the concrete wall and obtain the internal deformation of the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a preferred embodiment of a concrete wall deformation detection device of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a sliding rod in a concrete wall deformation detection device of the present invention;

[0029] Figure 3 It is a structural schematic diagram of a measuring rod in a concrete wall deformation detection device of the present invention;

[0030] Figure 4 It is a schematic diagram of the installation position of the displacement sensor in the concrete wall deformation detection device of the present invention.

[0031] In the figure, 1-sliding rod, 2-fixer, 3-measuring rod, 4-displacement sensor, 5-strain-displacement measuring system, 6-laser horizontal rangefinder, 7-fixed bracket, 8-concrete wall to be measured, 9-bolt, 10-measuring block, 11-first displacement sensor, 12-second displacement sensor, 13-third displacement sensor, 14-fourth displacement sensor, 15-end face of the measuring rod close to the laser horizontal rangefinder.

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0034] It should be noted that in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] The invention provides a concrete wall deformation detection device.

[0036] Reference Figures 1 to 4 In the preferred embodiment, a concrete wall deformation detection device includes a measuring block 10, a measuring rod 3, a sliding rod 1, a laser horizontal rangefinder 6 (with an accuracy of 1 mm), a fixing bracket 7, a fixing device 2 and a strain-displacement measurement system 5, wherein:

[0037] The measuring block 10 is fixed inside the concrete wall 8 to be measured to sense its stress changes. One end of the sliding rod 1 is inserted into the hole of the concrete wall 8 to be measured and fixedly connected to the measuring block 10. The other end of the sliding rod 1 is connected to the measuring rod 3. The hole size is larger than the external size of the sliding rod 1 (that is, the sliding rod 1 and the hole are clearance-matched). The fixture 2 is installed on the outer surface of the concrete wall 8 to be measured. The fixture 2 has a through hole (a threaded hole can be used) for the measuring rod 3 to pass through and support the middle part (the measuring rod 3 is fixedly connected to the fixture 2). The strain-displacement measurement system 5 includes at least 4 displacement sensors installed on the surface of the measuring rod 3 and the sliding rod 1 (the displacement sensors are supported by sensor fixing brackets) and a strain-displacement data collector connected to the displacement sensors. The laser horizontal rangefinder 6 is installed on the fixing bracket 7. The distance between the fixing bracket 7 and the end face of the measuring rod 3 (referring to the end close to the fixing bracket 7) is 2m to 3m.

[0038] After the concrete wall is poured, a drilling machine is used to drill holes in the test area, and the drilling depth is greater than the test depth. The displacement sensor uses a micro displacement sensor, and its length is less than or equal to 5mm.

[0039] When deformation occurs inside the concrete wall, the fixture 2 in the internal hole is driven to move up and down. The up and down movement of the fixture 2 drives the right end of the sliding rod 1 to move up or down, and then drives the measuring rod 3 to move. Because the middle part of the measuring rod 3 is supported on the fixture 2, similar to the structure of a seesaw, when the right end of the measuring rod 3 moves upward, its left end moves downward. The deformation of the sliding rod 1 is magnified by the length of the measuring rod 3, and finally the wall deformation is calculated through a variety of data.

[0040] Furthermore, the measuring rod 3 and the sliding rod 1 are detachably connected, and the installation distance between the measuring rod 3 and the sliding rod 1 is adjustable. By adjusting the distance between the measuring rod 3 and the sliding rod 1, the measuring block 10 can be moved to different depths inside the wall hole, so as to facilitate multi-point measurement of the deformation inside the concrete wall and determine the deformation of a certain point in the wall. The measuring rod 3 is made of lightweight material. The measuring rod 3 is provided with an external thread to connect with the fixture 2.

[0041] Specifically, refer to Figure 2 and Figure 3 A socket is provided at one end of the measuring rod 3, the end of the sliding rod 1 is inserted into the socket, waist-shaped holes are provided on the sliding rod 1 and the side wall of the socket (at least two holes are provided to achieve a stable connection between the two), and a bolt 9 passes through the side wall of the socket and the sliding rod 1 to detachably connect the sliding rod 1 and the measuring rod 3. The waist-shaped hole can adjust the distance between the measuring rod 3 and the sliding rod to achieve the purpose of length adjustment.

[0042] Furthermore, the concrete wall deformation detection device also includes two parts located on both sides of the measuring rod 3 and the sliding rod 1 ( Figure 1 Wind deflectors are provided on the inside and outside of the test chamber to prevent wind forces from causing deviations in the test.

[0043] Furthermore, the installation height of the laser horizontal distance meter 6 on the fixed bracket 7 is adjustable. By adjusting the height of the laser horizontal distance meter 6, the deformation changes of different positions of the concrete wall in the same facade can be measured.

[0044] Further, the laser horizontal rangefinder 6 is mounted on the fixed bracket 7 through a fixing device. Further, the fixed bracket 7 is equipped with two level rulers, and the fixed bracket 7 is vertically placed in the test site by adjusting the height of the support rod under the fixed bracket 7.

[0045] In this embodiment, the length of the measuring rod 3 is 3 to 5 meters, and the length of the sliding rod 1 is 10 to 30 cm. The length of the measuring rod 3 is much longer than the sliding rod 1, so the measuring rod 3 amplifies the deformation of the sliding rod 1, and the amplified measurement can improve the measurement accuracy of the concrete wall deformation detection device.

[0046] The measuring block 10 is provided with a threaded hole inside and is a cubic structure outside, and the measuring block 10 is threadedly connected to the sliding rod 1. The measuring block 10 is a cubic steel structure to accurately sense the deformation of the wall.

[0047] The working process of this concrete wall deformation detection device is as follows.

[0048] 1. Select a suitable measuring block 10 according to the size of the reserved hole on the concrete wall 8 to be measured. After fixing the measuring block 10 to the sliding rod 1, insert the head of the sliding rod 1 into the hole, fix the end of the measuring rod 3 to the fixture 2, and the sliding rod 1 passes through the center of the fixture 2 and is locked with the inner ring of the measuring rod 3 and fixed;

[0049] 2. Reference Figure 4 , the distance from the center of the measuring block 10 to the center of the fixture 2 is L1, and the first displacement sensor 11 is installed at L1 / 2, the distance from the center of the fixture 2 to the end of the measuring rod 3 is L2, and the second displacement sensor 12, the third displacement sensor 13 and the fourth displacement sensor 14 are installed at L2 / 4, L2 / 2, and 3L2 / 4 respectively;

[0050] 3. Install the laser horizontal rangefinder on the fixed bracket 7 so that the laser emission point of the laser horizontal rangefinder is level with the end center of the measuring rod 3. Use the laser horizontal rangefinder 6 to measure the horizontal distance from the laser emission point to the concrete wall as L3, and the horizontal distance from the laser emission point to the end face of the measuring rod 3 as L4;

[0051] 4. After the preset time, detect the displacement change monitored by the four displacement sensors (when the concrete wall is deformed, the measuring block 10 is driven to move up and down, which in turn drives the head of the sliding rod 1 to move up and down, and then drives the end of the entire measuring rod 3 to tilt up or down with the fixture 2 as the fulcrum), and measure the horizontal distance from the laser emission point to the end face of the measuring rod 3 after the change as L5;

[0052] 5. Substitute the displacement changes monitored by L1, L2, L3, L4, L5 and the four displacement sensors into the wall deformation calculation formula to calculate the wall deformation.

[0053] Specifically, the wall deformation calculation formula is:

[0054] x = L1 sinθ,

[0055] Among them, x is the wall deformation, θ is the average value of θ1 and θ2, s1, s2, s3, and s4 are displacement change values ​​of the first displacement sensor 11 to the fourth displacement sensor 14, respectively.

[0056] The concrete wall deformation detection device proposed by the present invention has the following beneficial effects:

[0057] 1. The concrete wall deformation detection device has a simple installation process and is easy to operate. The deformation changes of the concrete wall at different positions in the same facade can be measured by adjusting the height of the laser horizontal rangefinder 6, and the measurement accuracy is high;

[0058] 2. The concrete wall deformation detection device can adjust the length of the sliding rod 1 to move the measuring block 10 to different depths of the wall, perform multi-point measurement on the deformation inside the concrete wall, and determine the deformation conditions of multiple points inside the wall;

[0059] 3. The concrete wall deformation detection device can accurately measure the deformation of the concrete wall. By integrating the measurement data of the laser horizontal rangefinder 6 and the monitoring data of the strain-displacement measurement system 5, the local deformation of the concrete wall can be reasonably analyzed to obtain the internal deformation of the wall.

[0060] The present invention further proposes a measuring method of a concrete wall deformation detection device.

[0061] In this preferred embodiment, a measurement method based on the above concrete wall deformation detection device includes the following steps:

[0062] Step S10, select a suitable measuring block 10 according to the size of the reserved hole on the concrete wall 8 to be measured, fix the measuring block 10 to the sliding rod 1, insert the head of the sliding rod 1 into the hole (so as to fix the measuring block 10 inside the hole), fix the end of the measuring rod 3 to the fixture 2, and the sliding rod 1 passes through the center of the fixture 2 and is locked and fixed with the inner ring of the measuring rod 3;

[0063] Step S20, measuring the distance from the center of the measuring block 10 to the center of the fixture 2 is L1, and installing the first displacement sensor 11 at L1 / 2, the distance from the center of the fixture 2 to the end of the measuring rod 3 is L2, and installing the second displacement sensor 12, the third displacement sensor 13 and the fourth displacement sensor 14 at L2 / 4, L2 / 2 and 3L2 / 4 of the measuring rod 3 respectively;

[0064] Step S30, the laser horizontal rangefinder 6 is mounted on the fixed bracket 7 so that the laser emission point of the laser horizontal rangefinder 6 is kept horizontal with the end center of the measuring rod 3, and the horizontal distance from the laser emission point to the concrete wall is measured by the laser horizontal rangefinder 6 as L3, and the horizontal distance from the laser emission point to the end face of the measuring rod 3 is measured as L4;

[0065] Step S40, after a preset time (the preset time is the deformation time of the concrete wall), detect the displacement change monitored by the four displacement sensors, move the laser horizontal rangefinder 6 up and down to make the laser emission point flush with the center of the end face of the measuring rod (located on the same horizontal line), and measure the horizontal distance from the laser emission point to the end face of the measuring rod 3 after the change as L5;

[0066] Step S50, substituting L1, L2, L3, L4, L5 and the displacement changes monitored by the four displacement sensors into the wall deformation calculation formula to calculate the wall deformation.

[0067] Specifically, the wall deformation calculation formula is:

[0068] x = L1 sinθ,

[0069] Among them, x is the wall deformation, θ is the average value of θ1 and θ2, s1, s2, s3, and s4 are displacement change values ​​of the first displacement sensor 11 to the fourth displacement sensor 14, respectively.

[0070] The measuring method proposed in the present invention has a simple and convenient measuring process. The wall deformation can be calculated by substituting the measurement data of the laser horizontal rangefinder 6 and the monitoring data of the strain-displacement measurement system 5 into the wall deformation calculation formula.

[0071] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A concrete wall deformation detection device, characterized in that: It includes a measuring block, a measuring rod, a sliding rod, a laser horizontal rangefinder, a fixing bracket, a fixing device and a strain-displacement measuring system, wherein: The measuring block is fixed inside the concrete wall to be measured to sense its stress changes. One end of the sliding rod is inserted into the hole of the concrete wall to be measured and fixedly connected to the measuring block. The other end of the sliding rod is connected to the measuring rod. The hole size is larger than the external size of the sliding rod. The fixture is installed on the outer surface of the concrete wall to be measured. The fixture has a through hole for the measuring rod to pass through and support it. The strain-displacement measurement system includes at least 4 displacement sensors installed on the surfaces of the measuring rod and the sliding rod and a strain-displacement data collector connected to the displacement sensors. The laser horizontal rangefinder is installed on a fixed bracket. The distance between the fixed bracket and the end face of the measuring rod is 2m~3m; the measuring rod and the sliding rod are detachably connected, and the installation distance between the measuring rod and the sliding rod is adjustable.

2. The concrete wall deformation detection device according to claim 1, characterized in that: A socket is provided on one end of the measuring rod, the end of the sliding rod is inserted into the socket, waist-shaped holes are provided on the sliding rod and the side wall of the socket, and bolts pass through the side wall of the socket and the sliding rod to detachably connect the sliding rod and the measuring rod.

3. The concrete wall deformation detection device according to claim 1, characterized in that: Also included are wind deflectors located on both sides of the measuring rod and the sliding rod.

4. The concrete wall deformation detection device according to claim 1, characterized in that: The installation height of the laser horizontal rangefinder on the fixed bracket is adjustable.

5. The concrete wall deformation detection device according to claim 4, characterized in that: The laser horizontal rangefinder is installed on the fixing bracket through a fixing device.

6. The concrete wall deformation detection device according to claim 1, characterized in that: The measuring rod is 3-5 m long, and the sliding rod is 10-30 cm long.

7. The concrete wall deformation detection device according to any one of claims 1 to 6, characterized in that: The measuring block is provided with a threaded hole inside and is a cubic structure outside, and the measuring block is connected to the sliding rod by threads.

8. A method for measuring deformation of a concrete wall based on the device for detecting deformation of a concrete wall according to any one of claims 1 to 7, characterized in that: The following steps are involved: Select a suitable measuring block according to the size of the reserved hole on the concrete wall to be measured. After fixing the measuring block to the sliding rod, insert the head of the sliding rod into the hole, fix the end of the measuring rod to the fixture, and pass the sliding rod through the center of the fixture and lock it with the inner ring of the measuring rod and fix it; The distance from the center of the measuring block to the center of the fixture is L1, and the first displacement sensor is installed at L1 / 2. The distance from the center of the fixture to the end of the measuring rod is L2, and the second displacement sensor, the third displacement sensor and the fourth displacement sensor are installed at L2 / 4, L2 / 2 and 3L2 / 4 respectively; Install the laser horizontal distance meter on a fixed bracket so that the laser emission point of the laser horizontal distance meter is level with the end center of the measuring rod. Use the laser horizontal distance meter to measure the horizontal distance from the laser emission point to the concrete wall as L3, and the horizontal distance from the laser emission point to the end face of the measuring rod as L4. After the preset time, detect the displacement changes monitored by the four displacement sensors, move the laser horizontal rangefinder up and down to make the laser emission point flush with the center of the end face of the measuring rod, and measure the horizontal distance from the laser emission point to the end face of the measuring rod 3 after the change as L5; Substitute the displacement changes monitored by L1, L2, L3, L4, L5 and the four displacement sensors into the wall deformation calculation formula to calculate the wall deformation.

9. The measuring method of the concrete wall deformation detection device according to claim 8, characterized in that: The wall deformation calculation formula is: ， in, is the wall deformation, for and The average value of , , s1, s2, s3, and s4 are the displacement change values ​​from the first displacement sensor to the fourth displacement sensor respectively.

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