Anchor rod pull-out test device

Abstract

The utility model discloses an anchor rod pull-out test device, belongs to the technical field of anchor rod detection, and aims to carry out a pull-out test of a base anti-floating high-strength anchor rod on a soft soil layer without bearing capacity. The anchor rod pull-out test device comprises an upper base plate (5), an adjusting sleeve (4), a lower base plate (3), a center hole jack (2) and a pressure-bearing cushion block (1) which are sequentially arranged from top to bottom, and further comprises an extension rod (8), a fixed block (6) and a connector (7). The anchor rod pull-out test device is easy to manufacture, simple to combine, simple and convenient to operate, safe and stable, and enables the detection requirements to meet the standard and design requirements. The application range is extremely wide, and the device is suitable for direct high-strength pull-out tests on soft soil layers with poor geological conditions and is also completely suitable for direct pull-out tests on other various better soil layers.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor rod detection, in particular to an anchor rod pulling test device. Background Art

[0002] Base anti-floating anchor rods are increasingly being used in anti-floating cases of structural foundations. Base anti-floating anchor rods have the advantages of a wide range of applications, high single pile bearing capacity, low construction noise, low vibration and relatively low cost. In particular, the latest trend uses high-strength precision-rolled threaded steel with a bottom enlarged head to increase the force, which not only greatly enhances the single pile bearing capacity (pull-out force) of the anchor rod, but is also almost unaffected by various geological conditions. It can be applied to various unfavorable soft soil layers and is most valuable for development and utilization in coastal mud geological areas. However, there are no mature devices and methods in the prior art for pull-out tests of high-strength anti-floating anchor rods on soft soil layers without bearing capacity.

[0003] Glossary:

[0004] Soft soil layer: refers to the soft soil layer composed of high-pressure soil layers such as soft soil, silty soil, silty sand, water-containing clay, backfill, mixed soil, and miscellaneous backfill. This soil layer has a large water content, low physical and mechanical properties, and a small bearing capacity (30kpa < bearing capacity < 100kpa). It is easy to slide, settle, compress, and consolidate after bearing loads.

[0005] High-strength anchor rod: Use high-strength materials such as fine-rolled threaded steel as the main tensile reinforcement. The standard value of the design bearing capacity of a single anchor rod is 400KN-600KN, and the experimental tensile value is 600KN-1000KN. Utility Model Content

[0006] In order to conduct a pull-out test of a high-strength anchor rod with anti-floating base on a soft soil layer without bearing capacity, the utility model provides an anchor rod pull-out test device, which contains a through-type jack and a pressure-bearing pad. The anchor rod pull-out test device is easy to manufacture, simple to assemble, easy to operate, safe and stable, so that the detection requirements meet the specifications and design requirements. The application range is extremely wide, and it is suitable for directly conducting high-strength pull-out tests on soft soil layers with very poor geological conditions, and is also fully suitable for directly operating pull-out tests on other types of better soil layers.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] An anchor rod pull-out test device comprises an upper pad, an adjusting sleeve, a lower pad, a through-type jack and a pressure pad which are arranged in sequence from top to bottom. The anchor rod pull-out test device also comprises an extension rod, a fixing block and a connector. The anchor rod can pass through the pressure pad and the upper end of the anchor rod can be located in the through-type jack. The extension rod passes through the upper pad, the adjusting sleeve and the lower pad. The fixing block is fixed to the upper part of the extension rod. The fixing block abuts against the upper pad up and down. The lower end of the extension rod and the upper end of the anchor rod can be connected and fixed by a connector.

[0009] The projected area of ​​the pressure pad on the horizontal plane is 1m 2 -2.5m 2 The pressure pad contains a first through hole, which is in an upright state. The diameter of the first through hole is larger than the outer diameter of the anchor rod, and the axis of the first through hole coincides with the center line of the pressure pad.

[0010] The pressure-bearing pad is a reinforced concrete structure. A first sleeve is sleeved in the first through hole. The pressure-bearing pad contains upper and lower steel bars spaced apart from each other. The pressure-bearing pad is connected with a hook.

[0011] The upper steel bar layer includes a first upper steel bar layer and a first lower steel bar layer which are stacked up and down, the first upper steel bar layer includes a plurality of first upper steel bars arranged at intervals along the front-to-back direction, the first upper steel bars extend along the left-to-right direction, and the first lower steel bar layer includes a plurality of first lower steel bars arranged at intervals along the left-to-right direction, the first lower steel bars extend along the front-to-back direction.

[0012] The lower layer of steel bars includes a second upper steel bar layer and a second lower steel bar layer stacked up and down, the second upper steel bar layer includes a plurality of second upper steel bars arranged at intervals along the left-right direction, the second upper steel bars extend along the front-to-back direction, and the second lower steel bar layer includes a plurality of second lower steel bars arranged at intervals along the front-to-back direction, the second lower steel bars extend along the left-to-right direction.

[0013] The distance between two adjacent first upper steel bars is 150mm-250mm, the distance between two adjacent first lower steel bars is 150mm-250mm, the distance between two adjacent second upper steel bars is 50mm-150mm, and the distance between two adjacent second lower steel bars is 50mm-150mm.

[0014] The pressure pad is a steel frame structure, which contains an upper steel plate, a support beam and a lower steel plate connected in sequence from top to bottom. The upper steel plate and the lower steel plate are both in a horizontal state. The support beam is an I-beam or a rail, and the support beam extends in a horizontal direction.

[0015] The through-type jack is a through-type electric hydraulic jack. The through-type jack contains a piston rod and a cylinder arranged inside and outside. The through-type jack is connected to an oil pump. The through-type jack and the adjusting sleeve are both in an upright state. The upper pad and the lower pad are both in a horizontal state. The through-type jack contains a second through hole, the lower pad contains a third through hole, the adjusting sleeve contains a fourth through hole, and the upper pad contains a fifth through hole; the diameter of the second through hole is larger than the outer diameter of the connector, the extension rod and the anchor rod, the diameters of the third through hole, the fourth through hole and the fifth through hole are all larger than the outer diameter of the extension rod, the outer diameter of the lower pad is larger than the outer diameter of the piston rod of the through-type jack, the outer diameter of the lower pad is larger than the outer diameter of the upper pad, the outer diameter of the upper pad is larger than the outer diameter of the adjusting sleeve, and the outer diameter of the fixing block is larger than the diameter of the fifth through hole.

[0016] The extension rod is in an upright state, the fixing block is a locking nut, the fixing block is threadedly connected to the extension rod, the two fixing blocks are fixed to the upper part of the extension rod, the two fixing blocks are connected up and down, and the lower fixing block abuts against the upper pad up and down.

[0017] The anchor pull test device also includes a wooden cushion layer, through which the anchor can pass, the length of the wooden cushion layer is greater than the length of the pressure cushion block, the width of the wooden cushion layer is greater than the width of the pressure cushion block, the wooden cushion layer contains a plurality of wooden strips connected in a horizontal direction, and the projection area of ​​the wooden cushion layer on the horizontal plane is 15m 2 -25m 2 .

[0018] The beneficial effects of the utility model are: the anchor pull-out test device is easy to manufacture, simple to assemble, easy to operate, safe and stable, so that the detection requirements meet the specifications and design requirements. It has a wide range of applications, and is suitable for directly conducting high-strength pull-out tests on soft soil layers with very poor geological conditions, and is also fully suitable for directly operating pull-out tests on other types of good soil layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1 It is a front view schematic diagram of the anchor rod pulling test device described in the utility model.

[0021] Figure 2 yes Figure 1 Schematic diagram in the upper middle section.

[0022] Figure 3 yes Figure 1 Schematic diagram of the lower middle part.

[0023] Figure 4This is a schematic diagram of the main view when the supporting beam in the pressure pad is an I-beam.

[0024] Figure 5 It is a top view schematic diagram when the supporting beam in the pressure pad is an I-beam.

[0025] Figure 6 It is a main view schematic diagram when the supporting beam in the pressure pad is a rudder.

[0026] Figure 7 It is a top view schematic diagram when the supporting beam in the pressure pad is a rudder.

[0027] Figure 8 It is a top view schematic diagram of the pressure pad and the wooden pad.

[0028] Fig. 9 It is a schematic diagram for measuring the elevation of an extension rod.

[0029] 1. Pressure pad; 2. Through-type jack; 3. Lower pad; 4. Adjustment sleeve; 5. Upper pad; 6. Fixing block; 7. Connector; 8. Extension rod; 9. Oil pump; 10. Wooden pad; 11. Anchor rod;

[0030] 101, first through hole; 102, upper steel bar; 103, lower steel bar; 104, hook; 105, first upper steel bar layer; 106, first lower steel bar layer; 107, first upper steel bar; 108, first lower steel bar; 109, second upper steel bar layer; 1010, second lower steel bar layer; 1011, second upper steel bar; 1012, second lower steel bar; 1013, upper steel plate; 1014, support beam; 1015, lower steel plate;

[0031] 201, second through hole; 202, piston rod; 203, cylinder barrel;

[0032] 301, third through hole;

[0033] 401, fourth through hole;

[0034] 501, fifth through hole;

[0035] 901, Motor;

[0036] 1001. Wooden strips. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In order to facilitate understanding and description, the following description of the present invention adopts an absolute position relationship. Unless otherwise specified, the directional word "upper" means Figure 1In the upper direction, the locative word "lower" indicates Figure 1 In the lower direction, the locative word "left" indicates Figure 1 In the left direction, the locative word "right" indicates Figure 1 In the right direction, the locative word "front" indicates perpendicular to Figure 1 the paper plane of Figure 1 and pointing in the direction of the inner side of the paper plane, and the locative word "rear" indicates perpendicular to

[0039] the paper plane of Figures 1 to 3 and pointing in the direction of the outer side of the paper plane. The present utility model is described from the observation perspective of the reader or user, but the above locative words should not be understood or construed as limiting the protection scope of the present utility model. Regarding parameters such as the dimensions of the components therein, those skilled in the art can specifically determine according to actual needs.

[0040] As shown in 2 -2.5 m 2 , for example, the length, width, and thickness of the bearing pad 1 are 1200 mm, 1200 mm, and 350 mm respectively. The bearing pad 1 contains a first through hole 101, the first through hole 101 is in an upright state, the aperture of the first through hole 101 is larger than the outer diameter of the anchor rod 11, and the axis of the first through hole 101 coincides with the center line of the bearing pad 1. The bearing pad 1 is a stress-bearing member for bearing the pressure of the jack. Its certain thickness can be used to offset the depth of compression and settlement of the soft soil layer.

[0041] As shown in Figures 1 to 3 , the bearing pad 1 is of a reinforced concrete structure. The bearing pad 1 can be cast in place with C30 concrete. A first sleeve is sleeved in the first through hole 101. The bearing pad 1 contains upper layer steel bars 102 and lower layer steel bars 103 arranged at intervals up and down. The bearing pad 1 is connected with a lifting hook 104.

[0042] The upper steel bar 102 includes a first upper steel bar layer 105 and a first lower steel bar layer 106 which are stacked up and down. The first upper steel bar layer 105 includes a plurality of first upper steel bars 107 which are arranged at intervals along the front-to-back direction. The first upper steel bars 107 extend along the left-to-right direction. The first lower steel bar layer 106 includes a plurality of first lower steel bars 108 which are arranged at intervals along the left-to-right direction. The first lower steel bars 108 extend along the front-to-back direction.

[0043] like Figures 1 to 3 As shown, the lower layer of steel bars 103 includes a second upper steel bar layer 109 and a second lower steel bar layer 1010 which are stacked up and down, the second upper steel bar layer 109 includes a plurality of second upper steel bars 1011 which are spaced apart in the left-right direction, the second upper steel bars 1011 extend in the front-to-back direction, the second lower steel bar layer 1010 includes a plurality of second lower steel bars 1012 which are spaced apart in the front-to-back direction, the second lower steel bars 1012 extend in the left-to-right direction.

[0044] The distance between two adjacent first upper steel bars 107 can be 150mm-250mm (such as 200mm), the distance between two adjacent first lower steel bars 108 can be 150mm-250mm (such as 200mm), the distance between two adjacent second upper steel bars 1011 can be 50mm-150mm (such as 100mm), and the distance between two adjacent second lower steel bars 1012 can be 50mm-150mm (such as 100mm).

[0045] The diameter of the first upper steel bar 107 can be 16 mm, the diameter of the first lower steel bar 108 can be 16 mm, the diameter of the second upper steel bar 1011 can be 16 mm, and the diameter of the second lower steel bar 1012 can be 16 mm. The inner diameter of the first sleeve can be 150 mm. The hook 104 is diagonally arranged on the pressure pad 1, and the diameter of the steel bar used in the hook 104 can be 16 mm. The pressure pad 1 can directly contact the soil layer.

[0046] Or, if Figures 4 to 7 As shown, the pressure pad 1 comprises an upper steel plate 1013, a support beam 1014 and a lower steel plate 1015 connected in sequence from top to bottom, the upper steel plate 1013 and the lower steel plate 1015 are both in a horizontal state, and the first through hole 101 is located in the upper steel plate 1013 and the lower steel plate 1015. The support beam 1014 is an I-beam or a rail, and the support beam 1014 extends in the horizontal direction.

[0047] The through-type jack 2 can be an existing through-type electric hydraulic jack. The through-type jack 2 contains a piston rod 202 and a cylinder 203 arranged inside and outside. The lower end of the through-type jack 2 has a steel plate base. The size of the steel plate base is 500mm×500mm×20mm. The through-type jack 2 is connected to an oil pump 9. The through-type jack 2 and the adjustment sleeve 4 are both in an upright state. The oil pump 9 is connected to a motor 901 and a digital pressure meter. The oil pump 9 is connected to the through-type jack 2 through two hydraulic pipelines. The oil pump 9 is used to realize the hydraulic jacking stroke. The digital pressure meter can be used to read the pull-out force value.

[0048] The upper pad 5 and the lower pad 3 can both be annular structures, and the upper pad 5 and the lower pad 3 are both in a horizontal state. The piston rod 202 of the through-type jack 2 contains a second through hole 201, and the specification of the second through hole 201 is DN120mm. The lower pad 3 contains a third through hole 301, the adjusting sleeve 4 contains a fourth through hole 401, and the upper pad 5 contains a fifth through hole 501; the axis of the first through hole 101, the axis of the second through hole 201, the axis of the third through hole 301, the axis of the fourth through hole 401 and the axis of the anchor rod 11 (to be tested) can coincide. The hollow diameter of the through-type jack 2 (i.e., the second through hole 201) is 100mm-120mm, and the maximum lifting pressure is not less than 1.2 times the maximum tensile value of the anchor rod test. The electric high-pressure oil pump, oil pipe, digital display, etc. are selected according to the maximum tensile value of the design test of the anchor rod.

[0049] The diameter of the second through hole 201 is larger than the outer diameter of the connector 7, the outer diameter of the extension rod 8 and the outer diameter of the anchor rod 11, the diameter of the third through hole 301, the diameter of the fourth through hole 401 and the diameter of the fifth through hole 501 are all larger than the outer diameter of the extension rod 8, the diameter of the third through hole 301, the diameter of the fourth through hole 401 and the diameter of the fifth through hole 501 are all larger than the outer diameter of the connector 7, the outer diameter of the lower pad 3 is larger than the outer diameter of the piston rod 202 of the through-type jack 2, the outer diameter of the lower pad 3 is larger than the outer diameter of the upper pad 5, the outer diameter of the upper pad 5 is larger than the outer diameter of the adjusting sleeve 4, the outer diameter of the fixing block 6 is larger than the diameter of the fifth through hole 501, and the outer diameter of the fixing block 6 is smaller than the outer diameter of the upper pad 5.

[0050] The size of the lower pad 3 is 20mm×300mm×300mm, the specification of the third through hole 301 can be DN100mm, and the diameter of the third through hole 301 is no more than 50mm larger than the diameter of the anchor rod 11. The material of the adjustment sleeve 4 can be the same as that of the cylinder 203. The size of the upper pad 5 is 20mm×200mm×200mm, the specification of the fifth through hole 501 can be DN50mm, and the diameter of the fifth through hole 501 is no more than 20mm larger than the diameter of the anchor rod 11.

[0051] The extension rod 8 is in an upright state, the fixing block 6 is a locking nut, the material of the fixing block 6 can be the same as that of the anchor rod 11, and the height of the fixing block 6 can be 60mm. The axis of the fixing block 6, the axis of the connector 7, the axis of the extension rod 8 and the axis of the anchor rod 11 (to be tested) can coincide. The fixing block 6 is threadedly connected to the extension rod 8, the two fixing blocks 6 are fixed to the upper part of the extension rod 8, the two fixing blocks 6 are connected up and down, and the lower fixing block 6 abuts against the upper pad 5 up and down. The connector 7 can be an existing high-strength nut, the material strength of which is not lower than the main material of the anchor rod, the height of the connector 7 can be 150mm, and the lower end of the extension rod 8 and the upper end of the anchor rod 11 are both threadedly connected to the connector 7. The extension rod 8 can be directly cut from the main reinforcement raw material of the anchor rod 11, the length of the extension rod can be 800mm-1000mm, the extension rod 8 is connected to the upper end of the anchor rod 11 with the connector 7, so as to form the height space required by the hydraulic jack, and the extension rod 8 can extend the length of the anchor rod 11 to facilitate the top pressure test.

[0052] like Figure 1 and Figure 8 As shown, in order to better suit the anchor pull test on soft soil, the anchor pull test device also includes a wooden cushion layer 10, the anchor 11 can pass through the wooden cushion layer 10, the wooden cushion layer 10 is in a horizontal state, the length of the wooden cushion layer 10 is greater than the length of the pressure cushion block 1, the width of the wooden cushion layer 10 is greater than the width of the pressure cushion block 1, the wooden cushion layer 10 contains a plurality of wooden strips 1001 arranged and connected in a horizontal direction, and the projection area of ​​the wooden cushion layer 10 on the horizontal plane can be 15m 2 -25m 2 .

[0053] For example, the wooden cushion layer 10 includes a plurality of wooden strips 1001 arranged and connected in the front-to-back direction, and the wooden strips 1001 extend in the left-to-right direction. The wooden strips 1001 can be square wood of 50 mm×100 mm×4000 mm, or the wooden strips 1001 can be springboards of 50 mm×200 mm×4000 mm. The use of the wooden cushion layer 10 can increase the force bearing area, which is more suitable for implementing the anchor pull test on soft soil.

[0054] The following describes the method for using the anchor pull-out test device.

[0055] Step 1: Level the site and pave the working surface; straighten the upper end of the high-strength anti-floating anchor rod (i.e. the anchor rod 11 to be tested), and the anchor rod 11 is in an upright state.

[0056] Step 2: Screw the connector 7 into the top of the anchor rod 11, leaving half the thread length, and then screw the extension rod 8 into the other half of the thread length of the connector 7, and tighten it firmly.

[0057] Step 3: Use a tower crane / crane to place the pressure pad 1, and let the anchor rod 11 pass through the first through hole 101. If the soil on site is a serious soft soil layer, a wooden cushion layer 10 is required, and the wooden cushion layer 10 is laid first, and then the pressure pad 1 is hoisted.

[0058] Step 4: Install (insert) the through-type jack 2, lower pad 3, adjustment sleeve 4, upper pad 5 and fixed block 6 on the anchor rod 11 in sequence. The through-type jack 2, lower pad 3, adjustment sleeve 4, upper pad 5 and fixed block 6 are all located on the pressure pad 1. The fixed block 6, upper pad 5, adjustment sleeve 4, lower pad 3, through-type jack 2 and pressure pad 1 are connected in sequence from top to bottom. Measure the top elevation of the extension rod 8, and get the first elevation h0. When measuring the elevation, you can use a level, tripod and indium steel tower ruler, such as Fig. 9 shown.

[0059] Step 5: Install and connect the (high-pressure) oil pump 9, including the high-pressure pipeline, digital display or pressure gauge, etc. The high-pressure oil pump 9 is connected to the through-type jack 2 through the hydraulic pipeline.

[0060] Step six: Start the oil pump 9, the through-type jack 2 is lifted by a stroke, the anchor rod 11 and the extension rod 8 are subjected to tension, and the extension rod 8 converts the tension into pressure through the fixed block 6. The pressure is transmitted to the pressure pad 1 through the upper pad 5, the adjusting sleeve 4, the lower pad 3 and the through-type jack 2 in sequence, so that the pressure pad 1 sinks and compacts the soil layer.

[0061] Step 7: After stopping the pump, return the through-type jack 2 to its original position, and tighten the fixing block 6 downwards so that the fixing block 6 abuts against the upper pad 5 from top to bottom.

[0062] Step 8: Repeat steps 6 and 7 until the oil pressure shows the designed test tension value of the anchor rod 11 and the pressure is maintained stably to meet the requirements, that is, the pressure pad 1 no longer sinks significantly. Then measure the top elevation of the extension rod 8, and get the intermediate elevation h3. When measuring the elevation, you can use a level, tripod, indium steel tower ruler, etc. Fig. 9 shown.

[0063] Step nine: Stop the pump and return the oil, and remove the lower extension rod 8, connector 7, fixing block 6, upper pad 5, adjusting sleeve 4, lower pad 3, through-type jack 2, and pressure pad 1 in the reverse order of assembly.

[0064] Step 10: After 24 hours, measure the top elevation of the extension rod 8 for the last time. At this time, the final elevation h4 is obtained. When measuring the elevation, a level, a tripod, an indium steel tower ruler, etc. can be used. Fig. 9 The approximate plastic deformation and the approximate elastic deformation of the anchor rod 11 are calculated, and the approximate plastic deformation of the anchor rod 11 is h4-h0; the approximate elastic deformation of the anchor rod 11 is h3-h4.

[0065] The above is only a specific embodiment of the utility model, and it cannot be used to limit the scope of the utility model. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the utility model patent should still fall within the scope of this patent. In addition, the technical features of the utility model can be freely combined with each other, with technical features and technical solutions, and with technical solutions.

Claims

1. An anchor pull-out test device, characterized in that: The anchor rod pull-out test device comprises an upper pad (5), an adjusting sleeve (4), a lower pad (3), a through-type jack (2) and a pressure pad (1) which are arranged in sequence from top to bottom. The anchor rod pull-out test device also comprises an extension rod (8), a fixing block (6) and a connector (7). The anchor rod (11) can pass through the pressure pad (1) and the upper end of the anchor rod (11) can be located in the through-type jack (2). The extension rod (8) passes through the upper pad (5), the adjusting sleeve (4) and the lower pad (3). The fixing block (6) is fixed to the upper part of the extension rod (8). The fixing block (6) abuts against the upper pad (5) in upper and lower positions. The lower end of the extension rod (8) and the upper end of the anchor rod (11) can be connected and fixed via the connector (7).

2. The anchor pull-out test device according to claim 1, characterized in that: The projected area of ​​the pressure pad (1) on the horizontal plane is 1m 2 -2.5m 2 The pressure-bearing pad (1) contains a first through hole (101), the first through hole (101) is in an upright state, the hole diameter of the first through hole (101) is larger than the outer diameter of the anchor rod (11), and the axis of the first through hole (101) coincides with the center line of the pressure-bearing pad (1).

3. The anchor pull-out test device according to claim 2, characterized in that: The pressure-bearing pad (1) is a reinforced concrete structure. A first sleeve is sleeved in the first through hole (101). The pressure-bearing pad (1) contains upper steel bars (102) and lower steel bars (103) spaced apart from each other. The pressure-bearing pad (1) is connected to a hook (104).

4. The anchor pull-out test device according to claim 3, characterized in that: The upper steel bar (102) comprises a first upper steel bar layer (105) and a first lower steel bar layer (106) which are stacked and connected in an upper and lower manner. The first upper steel bar layer (105) comprises a plurality of first upper steel bars (107) arranged at intervals along the front-to-back direction. The first upper steel bars (107) extend in the left-to-right direction. The first lower steel bar layer (106) comprises a plurality of first lower steel bars (108) arranged at intervals along the left-to-right direction. The first lower steel bars (108) extend in the front-to-back direction.

5. The anchor pull-out test device according to claim 4, characterized in that: The lower layer of steel bars (103) comprises a second upper steel bar layer (109) and a second lower steel bar layer (1010) which are stacked and connected in an upper and lower manner, the second upper steel bar layer (109) comprises a plurality of second upper steel bars (1011) arranged at intervals in the left-right direction, the second upper steel bars (1011) extending in the front-to-back direction, and the second lower steel bar layer (1010) comprises a plurality of second lower steel bars (1012) arranged at intervals in the front-to-back direction, the second lower steel bars (1012) extending in the left-to-right direction.

6. The anchor pull-out test device according to claim 5, characterized in that: The distance between two adjacent first upper steel bars (107) is 150mm-250mm, the distance between two adjacent first lower steel bars (108) is 150mm-250mm, the distance between two adjacent second upper steel bars (1011) is 50mm-150mm, and the distance between two adjacent second lower steel bars (1012) is 50mm-150mm.

7. The anchor pull-out test device according to claim 2, characterized in that: The pressure pad (1) comprises an upper steel plate (1013), a support beam (1014) and a lower steel plate (1015) which are sequentially connected from top to bottom. The upper steel plate (1013) and the lower steel plate (1015) are both in a horizontal state. The support beam (1014) is an I-beam or a rail, and the support beam (1014) extends in a horizontal direction.

8. The anchor pull-out test device according to claim 1, characterized in that: The through-type jack (2) is a through-type electric hydraulic jack. The through-type jack (2) comprises a piston rod (202) and a cylinder (203) which are arranged inside and outside. The through-type jack (2) is connected to an oil pump (9). The through-type jack (2) and the adjusting sleeve (4) are both in an upright state. The upper pad (5) and the lower pad (3) are both in a horizontal state. The through-type jack (2) comprises a second through hole (201), the lower pad (3) comprises a third through hole (301), the adjusting sleeve (4) comprises a fourth through hole (401), and the upper pad (5) comprises a fifth through hole (51). hole (501); the diameter of the second through hole (201) is larger than the outer diameters of the connector (7), the extension rod (8) and the anchor rod (11); the diameters of the third through hole (301), the fourth through hole (401) and the fifth through hole (501) are all larger than the outer diameter of the extension rod (8); the outer diameter of the lower pad (3) is larger than the outer diameter of the piston rod (202) of the through-type jack (2); the outer diameter of the lower pad (3) is larger than the outer diameter of the upper pad (5); the outer diameter of the upper pad (5) is larger than the outer diameter of the adjusting sleeve (4); and the outer diameter of the fixing block (6) is larger than the diameter of the fifth through hole (501).

9. The anchor pull-out test device according to claim 8, characterized in that: The extension rod (8) is in an upright state, the fixing block (6) is a locking nut, the fixing block (6) is threadedly connected to the extension rod (8), the two fixing blocks (6) are fixed to the upper part of the extension rod (8), the two fixing blocks (6) are connected up and down, and the lower fixing block (6) is in vertical contact with the upper pad (5).

10. The anchor pull-out test device according to claim 1, characterized in that: The anchor rod pull-out test device also includes a wood cushion layer (10), the anchor rod (11) can pass through the wood cushion layer (10), the length of the wood cushion layer (10) is greater than the length of the pressure cushion block (1), the width of the wood cushion layer (10) is greater than the width of the pressure cushion block (1), the wood cushion layer (10) includes a plurality of wood strips (1001) arranged and connected in a horizontal direction, and the projection area of ​​the wood cushion layer (10) on the horizontal plane is 15m 2 -25m 2 .

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