Anti-sliding stability testing device for armor block

Abstract

The utility model relates to an anti-sliding stability testing device for a protective surface block, a tested protective surface structure consists of an upper block body and a lower block body, and the top surface of the upper block body is connected with the top surface of the lower block body; the testing device comprises a basic frame, a force measuring mechanism, a force applying mechanism and a block instability displacement measuring mechanism, wherein the block instability displacement measuring mechanism is fixed on a connecting piece; the connecting piece is rigidly connected with the clamping piece; the clamping piece is rigidly connected with the basic frame; the surface protecting structure to be tested is arranged on the inner side of the clamping piece and the upper part of the foundation frame; one side of the force measuring mechanism abuts against the side surface of the upper block body, and the other side abuts against the force applying mechanism; the force applying mechanism applies pressure to the force measuring mechanism, so that the direction of pressure borne by the force measuring mechanism and the direction of pressure applied to the side face of the upper block by the force measuring mechanism are kept consistent and are on the same horizontal straight line, and meanwhile the horizontal straight line penetrates through the perpendicular intersection point of a measuring needle of the displacement measuring mechanism and the side face of the upper block. The device is ingenious in structure, and is suitable for testing the maximum external force born by a regular or irregular armor block before slippage and instability.

Description

Technical Field

[0001] The utility model relates to a device for testing the anti-slip stability of a face armor block, which is suitable for on-site and indoor testing of the anti-slip stability of face armor blocks in hydraulic engineering, port engineering and marine engineering. It is mainly used for testing the anti-slip stability performance of face armor blocks in coastal, inland river and inland lake areas, and for testing the maximum external force to which the face armor block is subjected when sliding instability occurs. Background Art

[0002] In hydraulic structures such as water conservancy, port engineering, and marine engineering, the face block structure plays the role of wave dissipation, protection, and soil retaining. However, under the action of external forces such as wave force, soil stress, and vehicle load, the face block may slip and become unstable, thus affecting the construction and operation safety of the project. Therefore, people are very concerned about the anti-slip stability performance of the face block after masonry is completed, and how to obtain the maximum external force that the face block can withstand before slipping and becoming unstable.

[0003] At present, the anti-sliding stability of common face protection block structures is mainly determined through theoretical calculations and indoor test simulations. Among them, the indoor test simulates the instability of the face protection block under different tide levels, waves, water flow, and soil layers to determine the overall anti-sliding instability of the face protection structure. However, this method cannot detect the external force applied to the face protection block during sliding instability, and the test process is complicated, the test cycle is long, and the cost is high. Summary of the invention

[0004] In order to overcome the shortcomings of existing anti-slip stability methods of face block structures, such as complicated procedures, long test cycles and high costs, the utility model provides a face block anti-slip stability testing device with simple structure and high applicability, which is suitable for regular face blocks or irregular face blocks and can be effectively used in actual engineering site, indoor tests and inspections.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A device for testing the anti-slip stability of a protective face block, wherein the protective face structure to be tested consists of an upper block and a lower block, and the top surface of the upper block is connected to the top surface of the lower block; the test device comprises a basic frame, a force measuring mechanism, a force applying mechanism and a block instability displacement measuring mechanism, and the block instability displacement measuring mechanism is fixed on a connecting piece; the connecting piece is rigidly connected to a clamp; the clamp is rigidly connected to the basic frame; the protective face structure to be tested is arranged on the inner side of the clamp and on the upper part of the basic frame; one side of the force measuring mechanism is close to the side surface of the upper block, and the other side is close to the force applying mechanism; the force applying mechanism applies pressure to the force measuring mechanism so that the direction of the pressure exerted on the force measuring mechanism is consistent with the direction of the pressure applied by the force measuring mechanism to the side surface of the upper block and is on the same horizontal straight line, and at the same time, the horizontal straight line passes through the vertical intersection of the measuring needle of the displacement measuring mechanism and the side surface of the upper block.

[0007] Furthermore, the block instability displacement measuring mechanism is a displacement meter, the fixed end of the displacement meter is fixed on the connecting member, and the movable probe of the displacement meter is vertically placed on a side surface of the upper block.

[0008] Alternatively, the block instability displacement measuring mechanism adopts an infrared measuring instrument, a ruler, a measuring tape or a rope that limits instability.

[0009] Furthermore, the force measuring mechanism adopts a push-pull force gauge or a pressure gauge.

[0010] The basic frame is an I-shaped frame, or a closed plane frame or other structural forms that can maintain the frame flat and not deform.

[0011] The force applying mechanism adopts direct force application, jack-assisted force application or winch-assisted force application.

[0012] The upper block or the lower block comprises a block stone, a strip stone or a prefabricated block.

[0013] The upper block and the lower block may be of regular shape or irregular shape.

[0014] The upper block and the lower block are formed by bonding with a bonding material, by an embedding method, or by a bonding material and an embedding method acting together.

[0015] The bonding material includes mortar, concrete, cement, cement-based or sticky rice paste.

[0016] In the utility model, the block instability displacement measuring mechanism is a displacement meter, the fixed end of the displacement meter is fixed on the connecting piece, and can also be fixed on the unaffected protective structure, and the movable probe of the displacement meter is vertically placed on one side of the upper block. The block instability displacement measuring mechanism can also use infrared measuring instruments, rulers, tape measures and other tools that can measure the displacement of the block during instability, or a rope and other reference objects that limit instability. When the accuracy requirements for the displacement and the limited instability displacement are not high, visual estimation can be used. The method for determining the critical state of the measured protective structure when instability occurs can adopt one of the following methods: 1) when the measured displacement of the measured protective structure is greater than the limit value, 2) when the value measured by the dynamometer reaches the peak value, 3) using method 1) and method 2) for comprehensive judgment.

[0017] The beneficial effects of the utility model are mainly manifested in: simple structure, convenient operation, easy implementation, and high applicability; it is applicable to regular face protection blocks and irregular face protection blocks, applicable to indoor testing, and applicable to testing at actual engineering sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the anti-sliding stability test device of the face armor block.

[0019] Figure 2 It is a plan view of the anti-sliding stability test device of the face armor block.

[0020] Figure 3 This is the first block embedded card structure diagram

[0021] Figure 4 This is the second block embedded structure diagram

[0022] Among them, 1 is a displacement measuring mechanism, 2 is a basic frame, 3 is a connecting piece, 4 is a clamp, 5 is an upper block, 6 is a lower block, 7 is a bonding material, 8 is a force measuring mechanism, and 9 is a strength mechanism. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings.

[0024] Reference Figure 1 to Figure 4 A device for testing the anti-sliding stability of a protective face block comprises a basic frame 2, a force measuring mechanism 8, a protective face structure to be measured, a force applying mechanism 9 and a block instability displacement measuring mechanism 1, wherein the protective face structure to be measured is composed of an upper block 5 and a lower block 6 bonded by a bonding material 7, an embedded card method or a combination of the bonding material 7 and the embedded card method; the displacement measuring mechanism 1 is fixed on a connecting member 3; the connecting member 3 is rigidly connected to a clamp 4; the clamp 4 is rigidly connected to the basic frame 2; the protective face structure to be measured is arranged on the inner side of the clamp 4 and on the upper part of the basic frame 2; one side of the force measuring mechanism 8 is close to the side surface of the upper block 5, and the other side is close to the force applying mechanism 9; the force applying mechanism 9 applies pressure to the force measuring mechanism 8, so that the direction of the pressure on the force measuring mechanism 8 is consistent with the direction of the pressure applied by the force measuring mechanism 8 to the side surface of the upper block 5 and is on the same horizontal straight line, and the horizontal straight line passes through the vertical intersection of the measuring needle of the displacement measuring mechanism 1 and the side surface of the upper block 5.

[0025] In the present utility model, the block instability displacement measuring mechanism 1 can be a displacement meter, the fixed end of the displacement meter is fixed on one end of the connecting piece or on the unaffected protective structure, and the movable probe of the displacement meter is placed vertically on the side surface of the upper block 5; the block instability displacement measuring mechanism can also use infrared measuring instruments, rulers, tape measures and other tools that can measure the displacement of the block during instability, or reference objects such as ropes that limit the instability displacement. When the accuracy requirements for the displacement and the limited instability height are not high, visual estimation can be used. The method for determining the critical state of the measured protective structure when instability occurs can adopt one of the following methods: 1) when the measured displacement of the measured protective structure is greater than the limit value, 2) when the value measured by the dynamometer reaches the peak value, 3) using method 1) and method 2) for comprehensive judgment.

[0026] The force measuring mechanism 8 adopts a push-pull force gauge, a pressure gauge and other force measuring instruments.

[0027] The force applying mechanism 9 adopts direct force application, jack-assisted force application, winch-assisted force application or other force application methods.

[0028] The upper block 5 and the lower block 6 include blocks prefabricated with stone, stone strips, concrete or other materials.

[0029] The bonding material 7 includes mortar, concrete, cement, cement-based, glutinous rice paste and other bonding materials.

[0030] In the device of this embodiment, the force-applying mechanism applies pressure to the force-measuring mechanism, so that the direction of the pressure exerted on the force-measuring mechanism is consistent with the direction of the pressure applied by the force-measuring mechanism to the side of the upper block and is on the same straight line. At the same time, the straight line passes through the vertical intersection of the probe of the displacement measuring mechanism and the side of the upper block to ensure that the upper block slips and becomes unstable in a direction parallel to the pressure, and the displacement and pressure value at the time of instability can be directly measured. Finally, the shear strength is calculated based on the maximum shear failure pressure and the cross-sectional area of ​​the contact of the protective structure, and the average shear strength of the three groups of parallel test pieces is taken as the anti-sliding stability strength value of the protective block.

[0031] The test method implemented by the anti-slip stability test device of the face block of this embodiment includes the following steps:

[0032] S1, connect the basic frame 2, the clamp 4, and the connecting piece 3; fix the displacement measuring mechanism 1 at one end of the connecting piece 3; place the measuring needle of the displacement measuring mechanism 1 vertically on the side of the upper block 5; use the bonding material 7 to bond the upper block 5 and the lower block 6 to form the measured protective surface structure; place the measured protective surface structure on the inner side of the clamp 4 and the upper side of the basic frame 2 to ensure that the lower block 6 will not be displaced during the test; place one side of the force measuring mechanism 8 close to the side of the upper block 5, and the other side close to the force applying mechanism.

[0033] In the step S1, the block instability displacement measuring mechanism 1 can be a displacement meter. The block instability displacement measuring mechanism 1 can also use an infrared measuring instrument, a ruler, a tape measure and other tools that can measure the displacement of the block during the instability process, or a reference object such as a rope that limits the instability displacement. When the accuracy requirements for the displacement and the limited instability height are not high, visual estimation can be used. The method for determining the critical state of the measured protective structure when instability occurs can adopt one of the following methods: 1) when the measured displacement of the measured protective structure is greater than the limit value, 2) when the value measured by the dynamometer reaches the peak value, 3) using method 1) and method 2) for comprehensive judgment.

[0034] S2. Adjust and fix the measuring needle, force measuring mechanism 8 and force applying mechanism 9 of the displacement measuring mechanism 1 so that the lines connecting their acting forces are the same straight line, and the straight line is perpendicular to the left and right sides of the upper block 5.

[0035] S3, applying pressure by using the force applying mechanism 9 to read the initial values ​​of the block instability displacement measuring mechanism 1 and the force measuring mechanism 8;

[0036] In step S2, a recording device is installed on the upper surface of the structure around the protective face block that is not affected. The installation height is the same as the displacement instability limit value, and the recording direction can ensure that the recording can cover the entire instability process of the measured protective face structure, the reading of the force measuring mechanism 8, and the reading of the block instability measuring mechanism 1.

[0037] In the step S2, when the force applying mechanism 9 applies pressure, the lower block 6 is constrained by the clamp 4 and the base frame 2 and does not move.

[0038] S4, the force-applying mechanism 9 applies pressure to the force-measuring mechanism 8, and stops loading when the anti-sliding instability displacement of the upper block 5 is greater than a limit value or the force gauge reading reaches a peak value;

[0039] S5, reading the data of the block instability displacement measuring mechanism 1 and the force measuring mechanism 8.

[0040] S6. Repeat S2 to S5 to obtain the shear strength and maximum shear strain of the other two parallel specimens during anti-sliding instability. Under the condition of meeting the maximum allowable error, take the average value of the shear strength and maximum shear strain measured three times as the shear strength and maximum shear strain of the anti-sliding stability of the protective structure.

[0041] The contents described in the embodiments of this specification are merely enumerations of implementation forms of the utility model concept and are for illustrative purposes only. The protection scope of the utility model should not be considered to be limited to the specific forms described in this embodiment, and the protection scope of the utility model also extends to equivalent technical means that ordinary technicians in this field can think of based on the concept of the utility model.

Claims

1. A device for testing the anti-sliding stability of a protective face block, wherein the protective face structure to be tested is composed of an upper block and a lower block, and the top surface of the upper block is connected to the top surface of the lower block, characterized in that: The testing device includes a basic frame, a force measuring mechanism, a force applying mechanism and a block instability displacement measuring mechanism, wherein the block instability displacement measuring mechanism is fixed on a connecting piece; the connecting piece is rigidly connected to a clamp; the clamp is rigidly connected to the basic frame; the tested protective surface structure is arranged on the inner side of the clamp and on the upper part of the basic frame; one side of the force measuring mechanism is close to the side surface of the upper block, and the other side is close to the force applying mechanism; the force applying mechanism applies pressure to the force measuring mechanism so that the direction of the pressure on the force measuring mechanism is consistent with the direction of the pressure applied by the force measuring mechanism to the side surface of the upper block and is on the same horizontal straight line, and the horizontal straight line passes through the vertical intersection of the measuring needle of the displacement measuring mechanism and the side surface of the upper block.

2. A device for testing the anti-sliding stability of a face armor block according to claim 1, characterized in that: The block instability displacement measuring mechanism is a displacement meter, the fixed end of the displacement meter is fixed on the connecting member, and the movable probe of the displacement meter is vertically placed on a side surface of the upper block.

3. The anti-sliding stability testing device for a face armor block according to claim 1, characterized in that: The block instability displacement measuring mechanism adopts an infrared measuring instrument, a ruler, a measuring tape or a rope that limits instability.

4. A device for testing the anti-sliding stability of a face armor block according to any one of claims 1 to 3, characterized in that: The force measuring mechanism adopts a push-pull force gauge or a pressure gauge.

5. A device for testing the anti-sliding stability of a face armor block according to any one of claims 1 to 3, characterized in that: The basic frame is in an I-shape.

6. A device for testing the anti-sliding stability of a face armor block according to any one of claims 1 to 3, characterized in that: The force applying mechanism adopts direct force application, jack-assisted force application or winch-assisted force application.

7. A device for testing the anti-sliding stability of a face armor block according to any one of claims 1 to 3, characterized in that: The upper block or the lower block comprises a block stone, a strip stone or a prefabricated block.

8. The anti-sliding stability testing device for a face armor block according to claim 7, characterized in that: The upper block and the lower block are of regular shape or irregular shape.

9. A device for testing the anti-sliding stability of a face armor block according to any one of claims 1 to 3, characterized in that: The upper block and the lower block are formed by bonding with a bonding material, by an embedding method, or by a bonding material and an embedding method acting together.

10. A device for testing the anti-sliding stability of a face armor block according to claim 9, characterized in that: The bonding material includes mortar, concrete, cement, cement-based or sticky rice paste.

Images