Blasting damage test system for block stone accumulation body

Abstract

The invention discloses a rock block accumulation body blasting damage test system, and belongs to the technical field of blasting damage tests. Comprising a data acquisition system and a plurality of damage test devices, each damage test device comprises a block stone accumulation body, and the surface of the block stone accumulation body is divided into a plurality of test areas for arranging explosives; a plurality of test blocks are arranged on the mounting brackets, and sensors for detecting the pressure when the explosive explodes are arranged in the test blocks; the upper end face and the lower end face of the block stone accumulation body are arranged in parallel, and the side faces of the block stone accumulation body comprise oppositely-arranged straight side faces and oppositely-arranged inclined side faces. The dimension stone accumulation body is divided into a left side and a right side by taking the midpoint of the upper edge of the inclined side surface as a boundary, the plurality of mounting brackets are arranged on one side, and the plurality of mounting brackets are arranged at equal intervals and are positioned in the same plane. Different pressure information can be collected according to the position of a blasting point, and the damage effect of explosives with different equivalent weights, positions and depths on the breakwater is judged according to pressure changes.

Description

Technical Field

[0001] The present invention belongs to the technical field of blasting damage tests, and particularly relates to a blasting damage test system for a rubble mound breakwater. Background Art

[0002] A breakwater is an artificial marine structure mainly used to prevent waves from attacking ports, docks, nearshore buildings and beaches, maintain the stability of the water area in the port, and ensure the safe berthing, operation and navigation of ships in the port. It is usually built near the coast and consists of a dike body, a bottom protection and a foundation, etc. The dike body is generally made of earth and stone materials or concrete, etc., while the bottom protection and the foundation are used to protect the dike body from the scouring and erosion of waves and tides.

[0003] Modern breakwaters can adopt a variety of new materials and technologies, such as permeable materials, ecological slope protection, etc., to improve their environmental protection and ecological benefits. Some existing concrete breakwaters need to be demolished urgently. Breakwaters are usually located in the tidal flat area, and large equipment is not easy to enter. Therefore, how to effectively demolish these breakwaters is a problem that needs to be solved at present. The blasting method does not require the participation of large equipment and is one of the effective means to demolish breakwaters. However, it is still unclear how to arrange the charge amount and position. Therefore, it is necessary to conduct explosion tests on different positions such as the top and inside of the breakwater with different equivalent charges and test the internal pressure of the breakwater. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a blasting damage test system for a rubble mound breakwater, which can collect pressure information at different positions according to the position of the explosion point, and judge the different damage effects caused by explosives with different equivalent amounts, positions and depths on the breakwater according to the pressure changes at each point.

[0005] The present invention provides the following technical solutions:

[0006] Provide a blasting damage test system for a rubble mound breakwater, including a data acquisition system and a plurality of damage test devices. Each damage test device includes: a rubble mound breakwater, the surface of which is divided into several test areas, and each test area is used to arrange explosives; a plurality of mounting brackets are arranged inside the rubble mound breakwater, and several test blocks are arranged on the mounting brackets. Each test block is internally provided with a sensor for detecting the pressure at different positions inside the rubble mound breakwater when the explosive explodes, and the sensor is connected to the data acquisition system; the upper end surface and the lower end surface of the rubble mound breakwater are parallel, and the side surface of the rubble mound breakwater includes opposite straight side surfaces and opposite inclined side surfaces, and the upper edge of the straight side surface is smaller than the upper edge of the inclined side surface; taking the midpoint of the upper edge of the inclined side surface as the boundary, the rubble mound breakwater is divided into left and right sides, and a plurality of mounting brackets are arranged on one side, and the distances between the plurality of mounting brackets are the same and are located in the same plane.

[0007] As an alternative technical solution of the present invention, the upper and lower end faces of the rubble mound are both rectangular, the straight side faces are isosceles trapezoids, and the inclined side faces are rectangular.

[0008] As an alternative technical solution of the present invention, each of the damage test devices includes three mounting brackets, which are arranged in parallel, and one of the mounting brackets is located at the central position of the rubble mound.

[0009] As an alternative technical solution of the present invention, the number of test blocks on each mounting bracket is set to 1 to 3, and each test block is provided with 1 sensor.

[0010] As an alternative technical solution of the present invention, the mounting bracket includes a horizontal rod and a vertical rod, both the vertical rod and the horizontal rod are hollow rods, and the vertical rod is provided with a support frame for mounting the test block.

[0011] As an alternative technical solution of the present invention, the sensor is connected to the data acquisition system through a coaxial cable, and the coaxial cable passes through the cavities in the vertical rod and the horizontal rod and extends out from the bottom of the rubble mound.

[0012] As an alternative technical solution of the present invention, both the rubble mound and the test block are formed by casting with concrete materials.

[0013] As an alternative technical solution of the present invention, the explosive is connected to an explosive controller.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] A rubble mound blasting damage test system provided by the present invention pre-installs mounting brackets inside multiple rubble mounds, so that the sensors are located at predetermined positions inside the rubble mounds, and the sensors are distributed in a plane in the rubble mounds. Pressure information at different positions can be collected according to the position of the explosion point, which is beneficial for users to judge the different damage effects caused by explosives with different equivalents, different positions, and different depths on the breakwater according to the pressure changes at each point; at the same time, the sensors are inside the test blocks, and the pressure data collected by the sensors during blasting is more accurate. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a rubble mound blasting damage test system in an embodiment of the present invention;

[0017] Figure 2 is a schematic structural diagram of a rubble mound in an embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of the damage test position of the first rubble mound in an embodiment of the present invention;

[0019] Figure 4 It is a schematic diagram of the damage test position of the second block stone accumulation body in the embodiment of the present invention;

[0020] Figure 5 It is a schematic diagram of the damage test position of the third block stone accumulation body in the embodiment of the present invention.

[0021] In the figure, the markings are: 100, block stone accumulation body; 101, explosive; 102, explosive controller; 200, mounting bracket; 201, sensor; 202, data acquisition instrument; 203, computer; 204, test block. Specific implementation manner

[0022] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0023] Embodiment 1

[0024] This embodiment provides a blasting damage test system for block stone accumulation bodies to conduct explosion tests with different equivalent charges at different positions such as the top and inside of breakwaters. As Figure 1 shown, it includes a data acquisition system and a plurality of damage test devices. In this embodiment, the data acquisition system includes a data acquisition instrument 202 and a computer 203. Each damage test device includes:

[0025] A block stone accumulation body 100, the surface of which is divided into several test areas, and each test area is used to arrange an explosive 101; the block stone accumulation body 100 is formed by pouring concrete material, and the explosive 101 is connected to an explosive controller 102, and the explosion of the explosive 101 is controlled by the explosive controller 102. The explosive controller 102 is used to provide a trigger signal to the data acquisition system. During on-site tests, one end of the trigger wire is wound around the warhead of the explosive 101, and the other end is connected to the input end of the explosive controller 102; the output end of the explosive controller 102 is connected to the signal input end of the data acquisition system through a coaxial cable.

[0026] A plurality of mounting brackets 200 are arranged inside the block stone accumulation body 100. A plurality of test blocks 204 are arranged on the mounting brackets 200. Each test block 204 is internally provided with a sensor 201 for detecting the pressure at different positions inside the block stone accumulation body 100 when the explosive 101 explodes, and the sensor 201 is connected to the data acquisition system. The test block 204 is formed by pouring concrete material. After the sensor 201 is placed, it is poured, and a channel for connecting the coaxial cable to the sensor 201 is left on the test block 204 after pouring.

[0027] In this embodiment, the rubble mound 100 is divided into four layers for pouring. When pouring reaches the predetermined height of the first layer, the dumping is stopped, and a vibrating rod is used to vibrate the concrete until it is dense. The test block 204 is fixed to the mounting bracket 200 through positioning steel bars. Then, the second layer is poured, and the above process is repeated until the pouring is completed.

[0028] The upper and lower end faces of the rubble mound 100 are arranged in parallel. The side faces of the rubble mound 100 include opposite straight side faces and opposite inclined side faces, and the upper edge of the straight side face is smaller than the upper edge of the inclined side face, and the upper end face is exposed. Taking the midpoint of the upper edge of the inclined side face as the boundary, the rubble mound 100 is divided into left and right sides. A plurality of mounting brackets 200 are arranged on one side, and the intervals between the plurality of mounting brackets 200 are the same and are located in the same plane.

[0029] As Figure 2 shown, the upper and lower end faces of the rubble mound 100 are both rectangles, the straight side face is an isosceles trapezoid, and the inclined side face is a rectangle. In this embodiment, the shape of the upper end face is a rectangle of 2m * 5m, the shape of the straight side face is an isosceles trapezoid with an upper side of 2m, a lower side of 4m, and a height of 2m, and the shape of the inclined side face is a rectangle of 5m * m.

[0030] Each damage test device includes three mounting brackets 200, which are arranged in parallel, and one of the mounting brackets 200 is located at the central position of the rubble mound 100. The number of test blocks 204 on each mounting bracket 200 is set to 1 - 3, and each test block 204 is provided with 1 sensor 201. In this embodiment, the three mounting brackets 200 are all located on the right side of the rubble mound 100. The first mounting bracket is located at the central position of the rubble mound 100 and is arranged vertically. The second mounting bracket is parallel to the first mounting bracket and is translated 1m to the right. The third mounting bracket is parallel to the second mounting bracket and is translated 1m to the right.

[0031] The mounting bracket 200 includes a horizontal rod and a vertical rod. Both the vertical rod and the horizontal rod are hollow rods, and a support frame for mounting the test block 204 is provided on the vertical rod. The sensor 201 is connected to the data acquisition system through a coaxial cable, and the coaxial cable passes through the cavity in the vertical rod and the horizontal rod and extends out from the bottom of the rubble mound 100. In this embodiment, the horizontal rod is in an L shape or a cross shape, effectively standing the mounting bracket 200 in a suitable position and not being easily toppled during the pouring of concrete.

[0032] In this embodiment, the sensor 201 uses a PVDF sensor, with a measuring range of 60 - 100 MPa and an operating temperature of -20 - +200 °C.

[0033] In this embodiment, there are three damage test devices, and the rockfill body 100 therein is respectively taken as the first rockfill body, the second rockfill body, and the third rockfill body.

[0034] As Figure 3 shown, three test blocks 204 are provided on each of the mounting brackets 200 in the first rockfill body, and the internal sensors are respectively 1.2 m, 1.4 m, and 1.6 m from the ground from bottom to top. The center of the upper end face of the first rockfill body is taken as the first test area, the center of the front inclined side face is taken as the second test area, the center of the rear inclined side face is taken as the third test area, and the position 37 cm from the short side edge of the upper end face is taken as the fourth test area. In the first test area, the first and second blasting damage tests are carried out. In the second test area, the third and fourth blasting damage tests are carried out. In the third test area, the fifth blasting damage test is carried out. In the fourth test area, the sixth blasting damage test is carried out.

[0035] As Figure 4 shown, 3, 1, and 1 test blocks 204 are successively provided on the three mounting brackets 200 in the second rockfill body. The 3 sensors on the mounting bracket 200 at the central position of the rockfill body 100 are respectively 1.2 m, 1.4 m, and 1.6 m from the ground from bottom to top, and the 1 sensor on each of the other two mounting brackets 200 is 1.6 m from the ground. The center of the upper end face of the second rockfill body is taken as the fifth test area, the center of the front inclined side face of the second rockfill body is taken as the sixth test area, and the position 50 cm from the short side edge of the upper end face of the second rockfill body is taken as the seventh test area. PVC pipes are provided in the fifth test area and the sixth test area, and the PVC pipes are embedded into the surface of the rockfill body 100 and extend inwards by 20 - 30 cm. In the seventh test area, the seventh and eighth blasting damage tests are carried out. In the fifth test area, the ninth and tenth blasting damage tests are carried out. In the sixth test area, the , th blasting damage tests are carried out.

[0036] As Figure 5 shown, 3, 1, and 1 test blocks 204 are successively provided on the three mounting brackets 200 in the third rockfill body. The 3 sensors on the mounting bracket 200 at the central position of the rockfill body 100 are respectively 1.2 m, 1.4 m, and 1.6 m from the ground from bottom to top, and the 1 sensor on each of the other two mounting brackets 200 is 1.6 m from the ground. The center of the upper end face of the third rockfill body is taken as the eighth test area, and the center of the inclined side face of the third rockfill body is taken as the ninth test area. PVC pipes are provided in the eighth test area and the ninth test area, and the PVC pipes are embedded into the surface of the rockfill body 100 and extend inwards by 20 - 30 cm. In the eighth test area, the , The blast damage test was carried out in the ninth test area. , Explosive damage test.

[0037] In the above-mentioned rock accumulation blasting damage test system, by constructing three damage test devices, placing test blocks 204 in different rock accumulations, and placing different or same equivalent explosives in the same and different areas of different models for damage testing, the influence of factors such as different positions, different equivalents, and different penetration depths on the blasting damage effect of the breakwater can be obtained, providing rich data for analyzing the blasting damage theory of the breakwater.

[0038] Example 2

[0039] This embodiment provides a method for testing the blasting damage of a rock mass based on the first embodiment. The method comprises the following steps:

[0040] Step 1: Weld the horizontal rod to the bottom of the vertical rod to form an L-shaped bracket, cut a groove at a predetermined height of the vertical rod, and weld it to form a support frame.

[0041] Step 2: Use the template to construct the shell of the block stone accumulation body 100, place the mounting bracket 200 at the predetermined position in the shell, fix the bottom with stones, and lead the coaxial cable from the bottom of the shell, pour concrete into the shell, stop pouring when pouring to the preset height of the first layer, use a vibrating rod to vibrate the concrete to make it dense, fix the test block 204 on the mounting bracket 200 by positioning the steel bars, and then connect one end of the coaxial cable to the sensor 201, and the other end passes through the cavity of the vertical rod and the horizontal rod, and extends out for bundling. Pour the second layer, repeat the above process until the pouring is completed, and form the block stone accumulation body 100 after the concrete solidifies.

[0042] Step 3: sequentially detonate the first stone accumulation body, the second stone accumulation body and the third stone accumulation body with explosives.

[0043] Among them, in the first stone accumulation:

[0044] Place 1KG of TNT in the first test area ( Figure 3 1T) of explosives is placed in the first test area, and the first blasting data is collected through the data acquisition system after detonation. Then 1KG of TNT explosives is placed in the blasting pit of the first test area, and the second blasting data is collected through the data acquisition system after detonation.

[0045] Place 1 kg of TNT explosives in the second test area, collect the third blasting data through the data acquisition system after detonation, and then place 1 kg of TNT explosives in the blasting pit of the second test area, collect the fourth blasting data through the data acquisition system after detonation;

[0046] Arrange 2 KG of TNT ( Figure 3 denoted as 2T in

[0047] ) explosives in the third test area, and collect the blasting data of the fifth shot through the data acquisition system after detonation;

[0048] In the second stone accumulation body:

[0049] Arrange 2 KG of TNT explosives in the seventh test area, and collect the blasting data of the seventh shot through the data acquisition system after detonation. Then place 2 KG of TNT explosives in the blasting pit in the seventh test area, and collect the blasting data of the eighth shot through the data acquisition system after detonation;

[0050] Arrange 4 KG of TNT ( Figure 4 denoted as 4T in

[0051] ) explosives in the fifth test area, and collect the blasting data of the ninth shot through the data acquisition system after detonation. Then place 4 KG of TNT explosives in the blasting pit in the fifth test area, and collect the blasting data of the tenth shot through the data acquisition system after detonation;

[0052] Arrange 4 KG of TNT explosives in the sixth test area, and collect the blasting data of the eleventh shot through the data acquisition system after detonation. Then place 4 KG of TNT explosives in the blasting pit in the sixth test area, and collect the blasting data of the twelfth shot through the data acquisition system after detonation;

[0053] In the third stone accumulation body:

[0054] Arrange 1 KG of TNT explosives in the eighth test area, and collect the blasting data of the thirteenth shot through the data acquisition system after detonation. Then place 1 KG of TNT explosives in the blasting pit in the eighth test area, and collect the blasting data of the fourteenth shot through the data acquisition system after detonation;

[0055] Complete the blasting damage test on the breakwater, and the test results are shown in Table 1.

[0056] Table 1 Blasting damage test result table

[0057]

[0058] In this embodiment, taking the 3rd and 4th tests of the first rubble mound as examples, the test results are analyzed. The installation bracket at the central position of the breakwater is taken as the first bracket, and the installation brackets close to the first bracket are successively taken as the second bracket and the third bracket. The test results of the 3rd test of the first rubble mound are shown in Table 2.

[0059] Table 2 Data Sheet of the 3rd Test of the First Rubble Mound

[0060]

[0061] It can be seen from the 3rd test of the first rubble mound (initiated at the center position of the rear slope): The pressure value obtained by the installation bracket 1 - 1.4 m closest to the explosion center is the largest. Analyzing longitudinally, under the same bracket, the pressure value obtained by the sensor at a height of 1.2 m from the ground > the pressure value obtained by the sensor at a height of 1.4 m from the ground > the pressure value obtained by the sensor at a height of 1.6 m from the ground, because the measurement point at 1.2 m from the ground is closest to the explosion position, and the test results conform to the natural law. Analyzing transversely, at the same horizontal height, the pressure value measured by the sensor at the first bracket > the pressure value measured by the sensor at the second bracket > the pressure value measured by the sensor at the third bracket, because the first bracket is closest to the explosion position, and the test results conform to the natural law.

[0062] The test results of the 4th test of the first rubble mound are shown in Table 3.

[0063] Table Data Sheet of the 4th Test of the First Rubble Mound

[0064]

[0065] It can be seen from the 4th test of the first rubble mound (initiated at the center position of the rear slope): Since the explosion was carried out in the pit of the previous round, the measured data as a whole decreased significantly. The reason is that the internal structure of the concrete target was loosened by the previous test, so the conduction effect was greatly reduced. It can be seen that the pressure value obtained by the sensor closest to the explosion center is the largest. Analyzing longitudinally, under the same tooling, the pressure value obtained by the sensor at a height of 1.2 m from the ground > the pressure value obtained by the sensor at a height of 1.4 m from the ground > the pressure value obtained by the sensor at a height of 1.6 m from the ground, because the measurement point at 1.2 m from the ground is closest to the explosion position, and the test results conform to the natural law. Analyzing transversely, at the same horizontal height, the pressure value measured by the sensor at the first bracket > the pressure value measured by the sensor at the second bracket > the pressure value measured by the sensor at the third bracket, because the first bracket is closest to the explosion position, and the test results conform to the natural law.

[0066] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0067] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0068] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A blasting damage test system for block stone accumulations, characterized in that, It includes a data acquisition system and multiple damage test devices. Each damage test device includes: A block stone accumulation body (100) whose surface is divided into several test areas, and each test area is used to arrange explosives (101); Multiple mounting brackets (200) are arranged inside the block stone accumulation body (100). Several test blocks (204) are provided on the mounting brackets (200). Inside each test block (204), there is a sensor (201) for detecting the pressure at different positions inside the block stone accumulation body (100) when the explosive (101) explodes. The sensor (201) is connected to the data acquisition system; The upper and lower end faces of the block stone accumulation body (100) are parallel. The side surface of the block stone accumulation body (100) includes opposite straight side surfaces and opposite inclined side surfaces, and the upper edge of the straight side surface is smaller than the upper edge of the inclined side surface. Taking the midpoint of the upper edge of the inclined side surface as the boundary, the block stone accumulation body (100) is divided into left and right sides. Multiple mounting brackets (200) are arranged on one side, and the spacing of the multiple mounting brackets (200) is the same and they are located in the same plane.

2. The block stone accumulation body blasting damage test system according to claim 1, characterized in that: The upper and lower end faces of the block stone accumulation body (100) are both rectangles, the straight side surface is an isosceles trapezoid, and the inclined side surface is a rectangle.

3. The block stone accumulation body blasting damage test system according to claim 1, wherein: Each damage test device includes three mounting brackets (200) which are arranged in parallel, and one of the mounting brackets (200) is located at the central position of the block stone accumulation body (100).

4. The block stone accumulation blasting damage test system according to claim 1, characterized in that: The number of test blocks (204) on each mounting bracket (200) is set to 1 - 3, and there is 1 sensor (201) inside each test block (204).

5. The block stone accumulation blasting damage test system according to claim 1, characterized in that: The mounting bracket (200) includes a horizontal rod and a vertical rod. Both the vertical rod and the horizontal rod are hollow rods, and a support frame for mounting the test block (204) is provided on the vertical rod.

6. The block stone accumulation body blasting damage test system according to claim 5, characterized in that: The sensor (201) is connected to the data acquisition system through a coaxial cable. The coaxial cable passes through the cavities in the vertical rod and the horizontal rod and extends out from the bottom of the block stone accumulation body (100).

7. The block stone accumulation blasting damage test system according to claim 1, characterized in that: Both the block stone accumulation body (100) and the test block (204) are formed by pouring concrete materials.

8. The block stone accumulation body blasting damage test system according to claim 1, characterized in that: The explosive (101) is connected to an explosive controller (102).

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