A pull-out test device and test method for large-diameter long anchor

Abstract

The present invention proposes a large-diameter long anchor pull-out test device and test method, which include a reaction structure, an anchor, a loading device, a protection device and a support structure. The support structure and the reaction structure are bolted, and the anchor is bolted to the loading device and the reaction structure respectively; the support structure is fixed to the reaction wall or reaction floor of the laboratory, and the loading device is fixed to the reaction wall or reaction floor. The present invention proposes an anchor pull-out test device to solve the problem of insufficient height of the traditional pressure testing machine for anchor testing. The support structure and the reaction structure are provided with connecting bolt holes to realize the mechanical property test of anchors of any height and length. The experimental device adopts a high-precision loading device, which is simple and reliable to operate, easy to install, and convenient for batch testing of anchoring performance.

Description

Technical Field

[0001] The present invention belongs to the field of test technology, and specifically relates to a large-diameter long anchor pull-out test device and a test method. The large diameter refers to a long anchor with a diameter d not less than 28 mm, and the long anchor refers to a length not less than 5d. Background Art

[0002] Anchor test is commonly used for testing the bond strength between steel and concrete, testing the bond strength and pull-out force, and obtaining the bond-slip curve at the interface. The test results provide a basis for the establishment of a bond-slip structure, the bond performance analysis between concrete and steel, and the anchor length analysis. Existing indoor test methods all use a testing machine to provide a pull-out load on the anchor. Due to the requirements of the pull-out force and size of the testing machine, large or slightly larger anchor pull-out tests cannot be performed. Summary of the invention

[0003] The present invention proposes a large-diameter long anchor pull-out test device and test method, which adopts a support structure and a reaction force structure to replace a pressure testing machine, thereby solving the problem that large anchors or long anchor test pieces cannot be tested. At the same time, the support structure and the reaction force structure are provided with bolt holes at a certain interval to meet the test and detection requirements of various volume sizes, various anchor lengths and various anchor positions, and the device is easy to install and disassemble, and can perform accurate detection.

[0004] The technical solution of the present invention is:

[0005] A pull-out test device for a large-diameter long anchor, comprising a reaction force structure, an anchor to be tested, a loading device, a protection device and a support structure. The reaction force structure is a structure formed by connecting a reaction force column and a reaction force beam through a connecting bolt, the reaction force structure and the support structure are connected to form a whole through a connecting beam bolt, one end of the loading device is connected to the anchor to be tested through a conversion connector, and the other end is connected to the supporting vertical structure through a connecting back plate. The device can be connected horizontally or vertically to meet different test conditions and test requirements.

[0006] The reaction column, reaction beam, connecting beam and protection beam in the protection device in the reaction structure can be formed by processing steel, stainless steel and other materials, and the cross section can be I-shaped, box-shaped and their combination, the ends of the components can be open or closed, and stiffening ribs can be added or not inside, and holes with a certain distance are set on the side flanges. There is no limit on the spacing, size and shape of the holes, as long as they meet the bolt connection requirements. The length of the component is determined according to the actual test requirements.

[0007] Furthermore, the connector can be a component formed by processing steel, stainless steel or other materials, with an L-shaped cross section, including holes and stiffening ribs, and the stiffening ribs can be provided with one or more, and the shapes are triangular, trapezoidal, etc., without limitation. The holes match the holes of the reaction column and the holes of the reaction beam, and are connected by bolts to form an integral structure.

[0008] The anchor to be tested is composed of an anchoring matrix and an anchor, both of which are set according to specific test requirements. The anchor can be a steel bar, a steel strand, an anchor rod, etc. The loading device is composed of an actuator, a connecting ear plate, a connecting back plate and a connecting conversion piece.

[0009] Furthermore, the connection conversion member includes a bottom plate member, a vertical support member and a top plate member. A hole is provided in the middle of the bottom plate member, and the size is not limited, as long as the anchor member can pass through; a hole is provided in the top plate member, and the size is not limited, as long as the bolt connection with the connecting ear plate is met. The vertical support member can be arranged and combined in a well-shaped, I-shaped and box-shaped shape, and the size is not limited. The connection conversion member is a key member that connects the anchor member to be tested and the loading structure to form a whole.

[0010] Preferably, the actuator model, range, loading tonnage and other parameters are determined by the test requirements; the connecting ear plate is provided with an opening ear plate and a connecting hole, and the shape, size and number of the opening ear plate are not limited, and the shape and size of the connecting hole are not limited, as long as the bolt connection requirements are met. The connecting back plate is provided with an opening ear plate and a connecting hole.

[0011] The protection device is composed of a protection beam and a protection rod. One end of the protection rod is connected to the supporting vertical structure, and the other end is connected to the actuator to prevent the loading device such as the protection actuator from shifting. The supporting structure includes a supporting vertical structure and a supporting horizontal structure. The supporting vertical structure is determined by experimental conditions, and a reaction wall can be used, etc., and a certain number of holes must be ensured; the supporting horizontal structure is determined by experimental conditions, and a reaction bottom plate can be used, etc., and a certain number of holes must be ensured.

[0012] In addition, the present invention also provides a large-diameter long anchor pull-out test device and test method, which is characterized by comprising the following installation steps:

[0013] Step 1: Component processing:

[0014] Processing reaction columns, reaction beams, connecting beams and protection beams: The length is determined according to the actual test requirements. The components can be processed into steel, stainless steel and other materials. The ends can be open or closed. Stiffening ribs can be added or not inside. Holes with a certain spacing are set on the side flanges, which are determined according to the actual test requirements. There are no restrictions on the spacing, size and shape of the holes, which meet the requirements of bolt connection and anchor penetration.

[0015] Processing connectors, forming components from materials such as steel and stainless steel, welding stiffening ribs, and drilling holes.

[0016] Process the connection conversion parts, the bottom plate parts, the vertical support parts and the top plate parts. Process the holes in the middle of the bottom plate parts to allow the anchor parts to pass through; process the holes in the top plate parts to allow the bolts to connect with the connecting ear plates. Process the vertical support parts and weld them with the bottom plate parts and vertical support parts to form a whole.

[0017] The connecting ear plate and the connecting back plate are processed, and the ear plate is perforated. There is no restriction on the shape, size and quantity of the perforated ear plate, and there is no restriction on the shape and size of the connecting hole, as long as the bolt connection requirements are met. The connecting back plate is provided with perforated ear plates and connecting holes.

[0018] Step 2: Prepare the anchors to be tested. The anchor matrix and anchors are set according to the specific test requirements and are processed in advance according to the test requirements before the test. The anchor matrix can be different types of concrete structures or other material structures, and the anchors can be steel bars, steel strands, anchor rods, etc.

[0019] Step 3: Installation of reaction structure. The reaction structure can be installed vertically or horizontally. When installed vertically, the bottom of the reaction column is connected to the supporting horizontal structure through the connecting bolts, and the reaction column and the connecting beam are connected through the connecting bolts to form an overall reaction structure. The reaction beam is connected and fixed to the supporting horizontal structure through anchor rods to provide the reaction force of the anchor to be tested. The connection height of the connecting beam is determined by the specific test requirements.

[0020] When installed horizontally, the bottom of the reaction column is connected to the supporting vertical structure through the connecting beam and the connecting bolts, and the upper part of the reaction column is connected to the connecting beam through the connecting bolts to form an overall reaction structure, providing the reaction force of the anchor to be tested. The connection height of the connecting beam is determined by the specific test requirements.

[0021] Step 4: Loading structure installation. According to the specific test requirements, determine the model, loading tonnage and range; when installing horizontally or vertically, the front end of the loading structure is connected to the connecting ear plate bolts, and the rear end is connected to the connecting back plate bolts.

[0022] Step 5: Install the anchor to be tested. The anchor base and anchor pass through the connecting beam, the conversion connector, and are fixed to the connector using a joint. When installed vertically, a heightening block is placed under the anchor base to meet the measurement requirements. When installed horizontally, a protective beam is set at the tail of the anchor base. A certain distance is left between the protective beam and the anchor base to meet the measurement requirements. At the same time, the protective beam protects the anchor base from collapsing or excessive displacement during the test.

[0023] Step 6: Test and inspection. According to the actual test requirements, determine the loading rate and loading method of the loading device actuator. During the loading process, the actuator automatically records the loading force. Fix the micrometer or dial gauge or displacement meter at both ends of the anchor to measure the deformation of the anchor during loading.

[0024] Stop loading when the anchor is pulled out of the anchor matrix or the anchor matrix is ​​split and damaged.

[0025] Beneficial Effects

[0026] (1) The present invention proposes a large-diameter long anchor pull-out test device and test method, comprising a reaction structure, an anchor, a loading device, a protection device and a support structure. The support structure and the reaction structure are bolted together, and the anchor is bolted together with the loading device and the reaction structure respectively; the support structure is fixed to the reaction wall or reaction floor of the test room, and the loading device is fixed to the reaction wall or reaction floor.

[0027] (2) The device of the present invention solves the problem of insufficient height of the traditional pressure testing machine for anchor testing. The support structure and the reaction structure are provided with connecting bolt holes to realize the mechanical property test of anchors of any height and length.

[0028] (3) The experimental device of the present invention adopts a high-precision loading device, which is simple and reliable to operate, easy to install, and convenient for batch testing of anchoring performance.

[0029] (4) The present invention proposes a large-diameter long anchor pull-out test device and test method, which uses an actuator for high-precision loading and high-precision data recording to improve the test accuracy and reliability.

[0030] (5) The test device proposed in the present invention solves the problem of insufficient height of the traditional pressure testing machine for anchor testing. The support structure and the reaction structure are provided with connecting bolt holes to realize the mechanical performance test of anchors of any height and length. The experimental device adopts a high-precision loading device, which is simple and reliable to operate, easy to install, and convenient for batch testing of anchor performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of horizontal placement of the device of the present invention;

[0032] Figure 2 It is a schematic diagram of a vertical house of the device of the present invention;

[0033] Figure 3 This is a schematic diagram of the anchor to be tested according to the present invention;

[0034] Figure 4 It is a schematic diagram of the reaction beam structure of the present invention;

[0035] Figure 5 It is a schematic diagram of the reaction column structure of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the connecting piece of the present invention;

[0037] Figure 7 It is a schematic diagram of the loading structure of the present invention;

[0038] Figure 8 This is a schematic diagram of the conversion connector of the present invention;

[0039] Among them, 1-reaction structure, 1.1-reaction column, 1.1.1-hole, 1.1.2-stiffening rib, 1.2-reaction beam, 1.2.1-hole, 1.2.2-stiffening rib, 1.2.3-hole, 1.3-connecting beam, 1.4-connecting part, 1.4.1-hole, 1.4.2-stiffening rib, 1.4.3-bolt, 2-anchor to be tested, 2.1-anchor matrix, 2.2-anchor, 3-loading device, 3.1-actuator, 3.1.1- Connecting ear plates, 3.1.2-connecting holes, 3.1.3-connecting back plates, 3.1.5-perforated ear plates, 3.2-connecting conversion parts, 3.2.1-bottom plate parts, 3.2.3-vertical support parts, 3.2.4-top plate parts, 3.2.5-holes, 4-protection devices, 4.1-protection beams, 4-2 protection rods, 5-supporting structures, 5.1-supporting vertical structures, 5.2-supporting horizontal structures, 6.1-anchor rods, 6.2-heightening blocks, 7-displacement measuring devices. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] like Figure 1-Figure 8 As shown, a large-diameter long anchor pull-out test device comprises a reaction force structure 1, an anchor to be tested 2, a loading device 3, a protection device 4 and a support structure 5;

[0042] The reaction force structure 1 is used to provide reaction force support for the test specimen, i.e. the anchor to be tested;

[0043] The anchor 2 to be tested is a test piece, which is determined according to specific test requirements;

[0044] The loading device 3 is used to provide loading power for the anchor to be tested to realize the test;

[0045] The protection device 4 is used to prevent the anchor to be tested from collapsing and to provide protection for the test device and personnel;

[0046] The support structure 5 described belongs to the basic conditions of the laboratory and is used to fix the reaction structure;

[0047] The reaction structure 1 comprises two reaction columns 1.1, a reaction beam 1.2, a connecting beam 1.3 and a connecting member 1.4;

[0048] The anchor 2 to be tested comprises an anchoring matrix 2.1 and an anchor 2.2;

[0049] The loading device 3 comprises an actuator 3.1, a connecting ear plate 3.1.1, a connecting back plate 3.1.3 and a connecting conversion member 3.2;

[0050] The protection device 4 comprises a protection beam 4.1 and a protection tie rod 4.2;

[0051] The support structure 5 comprises a support vertical structure 5.1 and a support horizontal structure 5.2;

[0052] The reaction column 1.1 and the reaction beam 1.2 are connected by bolts through a connector 1.4, and the reaction column 1.1 and the supporting vertical structure 5.1 are connected by bolts through a connecting beam 1.3;

[0053] The reaction column 1.1 is made of steel, stainless steel or other materials, and has an I-shaped, box-shaped or combination thereof cross section. The end of the reaction column 1.1 may be open or closed, and may or may not be provided with stiffening ribs 1.1.2. The side flange of the reaction column 1.1 is provided with holes 1.1.1 with set spacing. The spacing, size and shape of the holes 1.1.1 are not limited, and may meet the bolt connection requirements.

[0054] The reaction beam 1.2 is made of steel, stainless steel and other materials. The cross section of the reaction beam 1.2 is an I-shaped, box-shaped or a combination thereof. The end of the reaction beam 1.2 may be open or closed. Stiffening ribs 1.2.2 may or may not be provided inside. Holes 1.2.1 with set spacing are provided on the side flanges of the reaction beam 1.2. There are no restrictions on the spacing, size and shape of the holes 1.2.1, as long as they meet the bolt connection requirements. Holes 1.2.3 are provided in the middle, and there are no restrictions on the spacing, size and shape of the holes 1.2.3, as long as they meet the penetration requirements of the anchor 2.2.

[0055] The connecting member 1.4 is made of steel, stainless steel or other materials, and has an L-shaped cross section, including holes 1.4.1 and stiffening ribs 1.4.2. The stiffening ribs 1.4.2 may be provided with one or more, and may be in the shape of a triangle, a trapezoid or the like, without limitation. The holes 1.4.1 match the reaction column holes 1.1.1 and the reaction beam holes 1.2.1, and are connected by bolts 1.4.3 to form an integral structure.

[0056] The anchoring matrix 2.1 in the anchoring piece 2 to be tested is set according to specific test requirements, and the anchoring piece 2.2 is a steel bar, a steel strand or an anchor rod;

[0057] The actuator 3.1 in the loading device 3 is connected by bolts through the connecting ear plate 3.1.1 and the connecting conversion member 3.2, and the actuator 3.1 is connected to the supporting vertical structure 5.1 through the connecting back plate 3.1.3;

[0058] The connection conversion member 3.2 includes a bottom plate member 3.2.1, a vertical support member 3.2.3 and a top plate member 3.2.4. A hole is provided in the middle of the bottom plate member 3.2.1, and the size is not limited, as long as the anchor member can pass through it; a hole 3.2.5 is provided on the top plate member 3.2.4, and the size is not limited, as long as it can be bolted to the connecting ear plate 3.1.1. The vertical support member 3.2.3 is arranged and combined in a tic-tac-toe shape, an I-shape shape and a box shape, and the size is not limited.

[0059] The parameters of the actuator 3.1, such as model, range, loading tonnage, etc., are determined by the test requirements;

[0060] The connecting ear plate 3.1.1 is provided with an opening ear plate 3.1.5 and a connecting hole 3.1.2. The opening ear plate 3.1.5 has no restrictions on shape, size and number, and the connecting hole 3.1.2 has no restrictions on shape and size, as long as the bolt connection requirements are met;

[0061] The connecting back plate 3.1.3 is provided with perforated ear plates and connecting holes, and the opening requirements are the same as 3.1.5 and 3.1.2;

[0062] The material of the protection beam 4.1 in the protection device 4 is a component formed by processing steel, stainless steel or other materials, and the cross section can be an I-shaped, box-shaped or a combination thereof, and the end can be open or closed, and stiffening ribs may or may not be provided inside. Holes at a certain interval are provided on the side flanges, and there is no restriction on the spacing, size and shape of the holes, as long as the bolt connection requirements are met;

[0063] One end of the protection rod 4.2 is connected to the supporting vertical structure 5.1, and the other end is connected to the actuator 3.1, so as to prevent the loading device such as the actuator from shifting;

[0064] The supporting vertical structure 5.1 in the supporting structure 5 is determined by experimental conditions, and a reaction wall or the like may be adopted, and a certain number of holes must be ensured to be opened; the supporting horizontal structure 5.2 is determined by experimental conditions, and a reaction bottom plate or the like may be adopted, and a certain number of holes must be ensured to be opened.

[0065] A pull-out test method for a large-diameter long anchor comprises the following steps:

[0066] Step 1: Component processing:

[0067] Processing reaction column 1.1: It can be processed into a component made of steel, stainless steel and other materials. The ends can be open or closed, and stiffening ribs may or may not be added inside. Holes are set at a certain distance on the side flange, which is determined according to actual test requirements.

[0068] Processing reaction beam 1.2, connection beam 1.3 and protection beam 4.1: The components can be processed into steel, stainless steel and other materials, the ends can be open or closed, the internal stiffening ribs 1.2.2 are welded, and the side flanges are processed with holes 1.2.1 and holes 1.2.3. There are no restrictions on the spacing, size and shape of holes 1.2.1, which meet the requirements of bolt connection, and holes 1.2.3 meet the requirements of anchor 2.2. The lengths of protection beam 4.1, reaction beam 1.2 and connection beam 1.3 are determined according to actual test requirements.

[0069] The processed connecting parts 1.4 can be formed components made of steel, stainless steel and other materials, and the stiffening ribs 1.4.2 are welded and the holes 1.4.1 are drilled.

[0070] Process the connection conversion part 3.2, process the bottom plate part 3.2.1, the vertical support part 3.2.3 and the top plate part 3.2.4. Process a hole in the middle of the bottom plate part 3.2.1 to allow the anchor to pass through; process the hole 3.2.5 in the top plate part 3.2.4 to allow the bolt connection with the connecting ear plate 3.1.1. Process the vertical support part 3.2.3 and weld it with the bottom plate part and the vertical support part to form a whole.

[0071] Process the connecting ear plate 3.1.1 and the connecting back plate 3.1.3, and open holes in the ear plate. There is no restriction on the shape, size and number of the opening ear plate 3.1.5, and there is no restriction on the shape and size of the connecting hole 3.1.2, as long as the bolt connection requirements are met. The connecting back plate 3.1.3 is provided with opening ear plates and connecting holes, and the opening requirements are the same as 3.1.5 and 3.1.2.

[0072] Step 2: Prepare the anchor 2 to be tested. The anchor base 2.1 and the anchor 2.2 are set according to the specific test requirements and are processed in advance according to the test requirements before the test. The anchor base 2.1 can be different types of concrete structures or other material structures, and the anchor 2.2 can be steel bars, steel strands, anchor rods, etc.

[0073] Step 3: Installation of reaction structure 1. The reaction structure 1 can be installed vertically or horizontally. When installed vertically, the bottom of the reaction column 1.1 is bolted to the supporting horizontal structure 5.2 through the connector 1.4, and the reaction column 1.1 and the connecting beam 1.2.1 are bolted to form an integral reaction structure through the connector 1.4. The reaction beam 1.2 is connected and fixed to the supporting horizontal structure 5.2 through the anchor rod 6.1 to provide the reaction force of the anchor 2 to be tested. The connection height of the connecting beam 1.2 and the connecting beam 1.2.1 is determined by the specific test requirements.

[0074] When installed horizontally, the bottom of the reaction column 1.1 is bolted to the supporting vertical structure 5.1 through the connecting beam 1.3 and the connecting piece 1.4, and the upper part of the reaction column 1.1 is bolted to the connecting beam 1.2 through the connecting piece 1.4 to form an integral reaction structure, providing the reaction force of the anchor 2 to be tested. The connection height of the connecting beam 1.2 is determined by the specific test requirements.

[0075] Step 4: Installation of loading structure 3. According to the specific test requirements, determine the model, loading tonnage and range; for horizontal installation and vertical installation, the front end of the loading structure 3 is bolted to the connecting ear plate 3.1.1, and the rear end is bolted to the connecting back plate 3.1.3.

[0076] Step 5: Install the anchor 2 to be tested. The anchor base 2.1 and the anchor 2.2 pass through the connecting beam 1.2, the connecting conversion piece 3.2 and are fixed at the connecting conversion piece 3.2 using a joint. When installed vertically, a heightening block 6.2 is placed under the anchor base 2.1 to meet the measurement requirements. When installed horizontally, a protective beam 4.1 is set at the tail of the anchor base 2.1. A certain distance is left between the protective beam 4.1 and the anchor base 2.1 to meet the measurement requirements. At the same time, the protective beam 4.1 protects the anchor base 2.1 from collapsing or excessive displacement during the test.

[0077] Step 6: Test and inspection. According to the actual test requirements, determine the loading rate and loading method of the loading device actuator 3.1. During the loading process, the actuator 3.1 automatically records the loading force. Fix the micrometer or dial gauge or displacement meter 7 at both ends of the anchor 2.2 to measure the deformation of the anchor 2.2 during the loading process.

[0078] When the anchoring piece 2.2 is pulled out from the anchoring matrix 2.1 or the anchoring matrix 2.1 is split and damaged, the loading is stopped.

Claims

1. A pull-out test method for a large-diameter long anchor, using a pull-out test device, the pull-out test device comprising a reaction force structure, a loading device, a protection device and a support structure; The reaction force structure is used to provide reaction force support for the anchor to be tested; The protection device is used to protect the anchor to be tested; The support structure is used to fix and install the reaction structure, and the support structure comprises a support vertical structure (5.1) and a support horizontal structure (5.2); the support vertical structure (5.1) adopts a reaction wall and has a set number of holes; the support horizontal structure (5.2) adopts a reaction bottom plate and has a set number of holes; The loading device is used to provide loading power for the anchor to be tested, and comprises an actuator (3.1), a connecting ear plate (3.1.1), a connecting back plate (3.1.3) and a connecting conversion piece (3.2), and the actuator (3.1) is bolted to the connecting conversion piece (3.2) via the connecting ear plate (3.1.1); It is characterized by comprising the following steps: Step 1, preparing the anchor to be tested, wherein the anchoring matrix (2.1) is a concrete structure, and the anchor (2.2) is a steel bar, a steel strand or an anchor rod; Step 2: Install the reaction force structure, which can be installed vertically or horizontally; The reaction structure (1) comprises a reaction column (1.1), a reaction beam (1.2), a connecting beam (1.3) and a connecting piece (1.4); the side flanges of the reaction column (1.1) are provided with holes at a set interval, and the holes are used for bolt connection; the side flanges of the reaction beam (1.2) are provided with holes at a set interval, and the holes are used for bolt connection, and a hole is provided in the middle, and the hole is used for the anchor (2.2) to pass through; the connecting piece (1.4) comprises a hole and a stiffening rib, and the hole matches the hole of the reaction column and the hole of the reaction beam, and is connected by bolts to form an overall structure; When installed vertically, the bottom of the reaction column (1.1) is bolted to the supporting horizontal structure (5.2) through the connecting piece (1.4), the reaction column (1.1) and the reaction beam (1.2) are bolted to form an integral reaction structure through the connecting piece (1.4), and the reaction beam (1.2) is connected and fixed to the supporting horizontal structure (5.2) through the anchor piece (2.2) to provide the reaction force of the anchor piece to be tested; When installed horizontally, the bottom of the reaction column (1.1) is bolted to the supporting vertical structure (5.1) through the connecting beam (1.3) and the connecting piece (1.4), and the upper part of the reaction column (1.1) is bolted to the reaction beam (1.2) through the connecting piece (1.4) to form an overall reaction structure to provide the reaction force of the anchor to be tested; Step 3, installing the loading structure, the front end of the loading structure is bolted to the connecting ear plate (3.1.1), and the rear end is bolted to the connecting back plate (3.1.3); Step 4, installing the anchor to be tested, the anchor base (2.1) and the anchor (2.2) pass through the reaction beam (1.2) and the connection conversion piece (3.2) and are fixed at the connection conversion piece (3.2) using a joint. When installed vertically, a heightening block is placed under the anchor base (2.1) to meet the measurement requirements. When installed horizontally, a protective beam (4.1) is placed at the tail of the anchor base (2.1). A set spacing is left between the protective beam (4.1) and the anchor base (2.1) to meet the measurement requirements. At the same time, the protective beam (4.1) protects the anchor base (2.1) from moving out of the set range. Holes are placed on the side flanges of the protective beam (4.1) for bolt connection. Step 5, conducting a test, determining the loading rate and loading method of the actuator (3.1) according to actual test requirements, the actuator (3.1) automatically records the loading force during the loading process, fixing a micrometer or a dial gauge or a displacement meter at both ends of the anchor (2.2) to measure the deformation of the anchor (2.2) during the loading process; when the anchor (2.2) is pulled out of the anchoring matrix (2.1) or the anchoring matrix (2.1) is split and damaged, the loading is stopped and the test is completed.

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