Cylinder type concrete dynamometer mounting bracket and split type mounting method thereof

Abstract

The invention provides a cylinder type concrete dynamometer mounting bracket, which is formed by welding reinforcing steel bars with the diameter of 30-45mm, and the length, width and height of the mounting bracket are greater than or equal to 1m * 1m * 1m; reinforcing ribs are welded on the periphery of the mounting bracket at the middle positions of the vertical steel bars of the mounting bracket; a group of diagonal reinforcing ribs are welded on diagonal lines of the four vertical steel bars on a horizontal plane 0.1 m above the middle positions of the vertical steel bars of the mounting bracket, the intersection of the two diagonal reinforcing ribs is broken, and a first circular hoop with the diameter of 90mm + / -1mm is welded at the broken part; another group of diagonal reinforcing ribs are welded on the diagonal lines of the four vertical steel bars on the horizontal plane 0.25 m above the middle position A of the vertical steel bars of the mounting bracket, the crossed part of the two diagonal reinforcing ribs is broken, and another second circular hoop with the diameter of 105 mm + / -1mm is welded at the broken part of the two diagonal reinforcing ribs. The cylindrical concrete dynamometer can be stably and vertically mounted in concrete by using the mounting bracket. The device is simple in structure and high in installation precision.

Description

Technical Field

[0001] The invention relates to a cylindrical concrete dynamometer mounting bracket and a split mounting method thereof, and belongs to the technical field of concrete dam stress monitoring research. Background Art

[0002] As a newly developed domestic measuring instrument in the field of water conservancy and hydropower engineering, the cylindrical concrete dynamometer has a high concrete stress measurement accuracy and can solve the problem of inaccurate stress measurement of hydraulic structures such as concrete dams. Installing a cylindrical concrete dynamometer at key locations of a concrete dam can effectively grasp the internal stress distribution of the dam and obtain the true stress of the dam, which plays an important role in correcting the dam simulation model, guiding dam construction, and evaluating the safety of the dam during the water storage period.

[0003] Usually, the cylindrical concrete dynamometer is installed during the dam pouring process. The installation process is complicated and the installation accuracy is easily affected by the construction process. During the concrete dam pouring process, in order to ensure the density of the silo surface concrete, the silo surface concrete is usually treated by vibration. The vibration process can easily cause the cylindrical concrete dynamometer installed inside the concrete to deflect, resulting in inaccurate stress measurement.

[0004] Therefore, ensuring that the cylindrical concrete dynamometer is accurately installed at the monitoring point inside the dam and that the concrete dynamometer is vertically installed inside the dam body is the key to giving full play to the high-precision stress measurement function of the cylindrical concrete dynamometer. However, there is currently no reliable installation method that can ensure that the cylindrical concrete dynamometer can be safely and reliably installed vertically inside the concrete dam, which greatly limits the promotion and use of the cylindrical concrete dynamometer. Summary of the invention

[0005] In order to solve the current installation problem of cylinder type concrete dynamometer, the purpose of the present invention is to provide a cylinder type concrete dynamometer mounting bracket and a split installation method thereof, so as to realize the precise installation of the cylinder type concrete dynamometer during the dam construction process, and ensure that the cylinder type concrete dynamometer is firmly installed and the installation direction is not skewed during the pouring and vibration process of the dam.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a cylindrical concrete dynamometer mounting bracket, the mounting bracket is welded by steel bars with a diameter of 30 to 45 mm, and its length х width х height is greater than or equal to 1mх1mх1m;

[0007] At the middle position of the vertical steel bars of the mounting bracket, reinforcing ribs are welded around the mounting bracket, and the reinforcing ribs are located on the same horizontal plane;

[0008] On a horizontal plane 0.1 meters above the middle position of the vertical steel bars of the mounting bracket, a set of diagonal reinforcement bars are welded on the diagonal lines of the four vertical steel bars, and two diagonal reinforcement bars are disconnected at the intersection, and a first circular clamp with a diameter of 90 mm ± 1 mm is welded at the disconnection;

[0009] On the horizontal plane 0.25 meters above the middle position A of the vertical steel bars of the mounting bracket, another set of diagonal reinforcement bars are welded on the diagonal lines of the four vertical steel bars. The two diagonal reinforcement bars are disconnected at the intersection, and another second circular clamp with a diameter of 105mm±1mm is welded at the disconnection.

[0010] Preferably, the first circular clamp and the second circular clamp are coaxial;

[0011] The first circular clamp is used for clamping the PVC sleeve at one end of the cylindrical concrete dynamometer, and the second circular clamp is used for clamping the PVC sleeve at the other end of the cylindrical concrete dynamometer.

[0012] Preferably, the horizontal distance between the vertical steel bar of the mounting bracket and the first circular clamp and the second circular clamp is greater than 1m;

[0013] The reinforcing ribs and the diagonal reinforcing ribs are all arranged horizontally.

[0014] A method for installing a cylindrical concrete dynamometer in a split manner using the cylindrical concrete dynamometer mounting bracket:

[0015] First, insert or pre-embed the four vertical steel bars of the mounting bracket into the concrete of the upper bin by drilling holes;

[0016] Fix the PVC sleeve at the lower end of the cylindrical concrete dynamometer in the first circular clamp, and pour fine aggregate concrete into the PVC sleeve to make it dense;

[0017] A metal housing sleeve with a built-in dynamometer body is threadedly connected above the PVC sleeve;

[0018] Then, another PVC sleeve is threadedly connected to the upper part of the metal shell sleeve, and the PVC sleeve is clamped in the second circular clamp, and fine aggregate concrete is poured into the PVC sleeve to make it dense;

[0019] When the next warehouse of concrete is poured, the cylindrical concrete dynamometer is installed and buried in the concrete.

[0020] Preferably, there are no vertical steel bars parallel to the axis of the PVC sleeves at both ends of the pre-buried cylindrical concrete dynamometer within 1 m. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the mounting bracket structure of the cylindrical concrete dynamometer of the present invention;

[0022] Figure 2A This is the process (1) of the split installation method of the cylindrical concrete dynamometer of the present invention;

[0023] Figure 2B This is step (two) of the split installation method of the cylindrical concrete dynamometer of the present invention;

[0024] Figure 2C This is step (three) of the split installation method of the cylindrical concrete dynamometer of the present invention. DETAILED DESCRIPTION

[0025] The structure and features of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that various modifications can be made to the embodiments disclosed herein, and therefore, the embodiments disclosed in the specification should not be regarded as limiting the present invention, but are merely examples of embodiments, the purpose of which is to make the features of the present invention obvious.

[0026] The cylindrical concrete dynamometer is composed of a dynamometer body, a metal shell sleeve and two PVC sleeves. The dynamometer body is built into the metal shell sleeve, and a PVC sleeve is threaded at each end of the metal shell sleeve. At the installation site of the cylindrical concrete dynamometer, concrete needs to be poured into the PVC sleeve to form a concrete force transmission column to measure the axial dam concrete stress of the dynamometer. To ensure the accuracy of the concrete dynamometer measurement, when grouting the PVC sleeve, it is necessary to ensure that there is no gap between the concrete and the dynamometer body, and the two are in close contact.

[0027] To ensure accurate installation of the cylindrical concrete dynamometer, Figure 1 As shown, the present invention designs a mounting bracket, which is welded by steel bars with a diameter of 30 to 45 mm, and its length х width х height is greater than or equal to 1m х 1m х 1m. At the middle position A of the vertical steel bars 1 of the mounting bracket, reinforcing ribs 2 are welded around the mounting bracket; on the horizontal plane 0.1 meters above the middle position A of the vertical steel bars of the mounting bracket, a group of diagonal reinforcing ribs 3 are welded on the diagonal lines of the four vertical steel bars 1, and the intersection of the two diagonal reinforcing ribs is disconnected, and a first circular clamp 4 with a diameter of 90mm ± 1mm ​​is welded at the disconnection; on the horizontal plane 0.25 meters above the middle position A of the vertical steel bars of the mounting bracket, another group of diagonal reinforcing ribs 3 are welded on the diagonal lines of the four vertical steel bars 1, and the intersection of the two diagonal reinforcing ribs is disconnected, and another second circular clamp 5 with a diameter of 105mm ± 1mm ​​is welded at the disconnection.

[0028] The first circular clamp 4 and the second circular clamp 5 are coaxial. The first circular clamp 4 is used to clamp the PVC sleeve at one end of the cylindrical concrete dynamometer, and the second circular clamp 5 is used to clamp the PVC sleeve at the other end of the cylindrical concrete dynamometer.

[0029] The applicant of the present invention has found that when there are steel bars parallel to the axial direction of the PVC sleeve in the vicinity of the cylindrical concrete dynamometer PVC sleeve, the steel bars will seriously interfere with the stress distribution of the concrete force transmission column in the PVC, resulting in inaccurate stress measurement results of the cylindrical concrete dynamometer. Therefore, if Figure 1 As shown, the horizontal distance between the vertical steel bar 1 constituting the mounting bracket of the present invention and the first circular clamp 4 and the second circular clamp 5 is more than 1m, and each reinforcing bar 2 and the diagonal reinforcing bar 3 are all located on the horizontal plane, that is, there are no axial steel bars parallel to the PVC sleeve within 1m of the PVC sleeve on both sides of the cylindrical concrete dynamometer.

[0030] In order to ensure that the concrete force transmission columns in the PVC sleeves at both ends of the cylindrical concrete dynamometer are not affected by the vertical steel bars of the mounting bracket, the distance between the vertical steel bars 1 and the first circular clamp 4 and the second circular clamp 5 of the present invention is maintained at more than 1.36m.

[0031] Figure 2A-2C This is a diagram of the split installation process of the cylindrical concrete dynamometer of the present invention. As shown in the figure, first insert or pre-embed the four vertical steel bars 1 of the installation bracket into the upper bin concrete 6 by drilling, preferably the middle position A of the four vertical steel bars 1 is exposed to the concrete; then, clamp the PVC sleeve 7 at the lower end of the cylindrical concrete dynamometer into the first circular clamp 4, and pour fine aggregate concrete into the PVC sleeve 7 to make it dense; thread the metal shell sleeve with the built-in dynamometer body on the top of the PVC sleeve 7; then thread another PVC sleeve 8 on the top of the metal shell sleeve, and clamp the PVC sleeve 8 into the second circular clamp 5, and pour fine aggregate concrete into the PVC sleeve 8 to make it dense; at this point, the cylindrical concrete dynamometer is installed and the next bin of concrete can be poured.

[0032] It should be noted that during the installation process on the dam concrete silo, it is necessary to ensure that there are no steel bars parallel to its axis within 1m of the PVC sleeves at both ends of the cylindrical concrete dynamometer.

[0033] The cylindrical concrete dynamometer mounting bracket and split mounting method provided by the present invention have the following advantages compared with the traditional mounting method:

[0034] 1. High installation accuracy can ensure that the cylindrical concrete dynamometer is installed firmly in the concrete and the installation direction is not skewed.

[0035] The present invention uses a mounting bracket to ensure that the stress measurement direction of the cylindrical concrete dynamometer is accurate and not easily affected by the pouring bin and vibration processes, thereby reducing the stress measurement error. At the same time, the distance between the cylindrical concrete dynamometer and the vertical steel bars of the mounting bracket is large, and the vertical steel bars have little effect on the concrete force transmission column of the PVC sleeve of the cylindrical concrete dynamometer, thereby reducing the influence of the vertical steel bars on the stress monitoring result of the cylindrical concrete dynamometer.

[0036] 2. The cylindrical concrete dynamometer mounting bracket of the present invention is simple to manufacture and process. The manufacturing materials are the existing materials at the dam pouring site. It can be quickly manufactured and formed at the dam pouring site, and has good application value.

[0037] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cylindrical concrete dynamometer mounting bracket, characterized in that: The mounting bracket is welded from steel bars with a diameter of 30 to 45 mm, and its length х width х height is greater than or equal to 1mх1mх1m; At the middle position of the vertical steel bars of the mounting bracket, reinforcing ribs are welded around the mounting bracket, and the reinforcing ribs are located on the same horizontal plane; On a horizontal plane 0.1 meters above the middle position of the vertical steel bars of the mounting bracket, a set of diagonal reinforcement bars are welded on the diagonal lines of the four vertical steel bars, and two diagonal reinforcement bars are disconnected at the intersection, and a first circular clamp with a diameter of 90 mm ± 1 mm is welded at the disconnection; On the horizontal plane 0.25 meters above the middle position A of the vertical steel bars of the mounting bracket, another set of diagonal reinforcement bars are welded on the diagonal lines of the four vertical steel bars. The two diagonal reinforcement bars are disconnected at the intersection, and another second circular clamp with a diameter of 105mm±1mm is welded at the disconnection.

2. The cylindrical concrete dynamometer mounting bracket according to claim 1 is characterized in that: The first circular clamp and the second circular clamp are coaxial; The first circular clamp is used for clamping the PVC sleeve at one end of the cylindrical concrete dynamometer, and the second circular clamp is used for clamping the PVC sleeve at the other end of the cylindrical concrete dynamometer.

3. The cylindrical concrete dynamometer mounting bracket according to claim 2 is characterized in that: The horizontal distance between the vertical steel bar of the mounting bracket and the first circular clamp and the second circular clamp is greater than 1m; The reinforcing ribs and the diagonal reinforcing ribs are all arranged horizontally.

4. A method for installing a cylindrical concrete dynamometer in a split manner using the cylindrical concrete dynamometer mounting bracket according to any one of claims 1 to 3, characterized in that: First, insert or pre-embed the four vertical steel bars of the mounting bracket into the concrete of the upper bin by drilling holes; Fix the PVC sleeve at the lower end of the cylindrical concrete dynamometer in the first circular clamp, and pour fine aggregate concrete into the PVC sleeve to make it dense; A metal housing sleeve with a built-in dynamometer body is threadedly connected above the PVC sleeve; Then, another PVC sleeve is threadedly connected to the upper part of the metal shell sleeve, and the PVC sleeve is clamped in the second circular clamp, and fine aggregate concrete is poured into the PVC sleeve to make it dense; When the next warehouse of concrete is poured, the cylindrical concrete dynamometer is installed and buried in the concrete.

5. The method for installing a split-type cylindrical concrete dynamometer according to claim 4, characterized in that: There are no vertical steel bars parallel to the axis within 1m of the PVC sleeves at both ends of the pre-buried cylindrical concrete dynamometer.

Images