Drawing test device for anchor cable or anchor rod

Abstract

The utility model discloses a drawing test device for an anchor cable or an anchor rod. The drawing test device comprises a base bracket, at least one middle bracket, a top bracket, an anchorage device and at least two portable drawing instruments, the portable drawing instrument comprises a hollow jack; a first hollow jack is clamped between the base support and the middle support, and a second hollow jack is clamped between the middle support and the top support. The base support is installed on the counter-force beam, and an anchor cable or an anchor rod sequentially penetrates through the base support, the first hollow jack, the middle support, the second hollow jack and the top support and then is connected and matched with an anchorage device located on the top of the top support. When the measuring range of a single small-measuring-range drawing instrument is insufficient, the supports and the at least two hollow jacks are connected in series, spliced and combined, so that the measuring ranges of the two drawing instruments are overlapped, and a drawing test can be carried out on an anchor rod or an anchor cable which is relatively long in design length and relatively large in tension value.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor cable or anchor rod test detection, in particular to a pulling test device for an anchor cable or anchor rod with a large deformation amount. Background Art

[0002] With the development of my country's economic construction, the scale of cities continues to expand, the area of ​​building land is becoming increasingly scarce, and the construction industry is showing a leapfrog development trend. The construction of large-scale high-rise building foundations and basements, large underground shopping malls, underground parking lots, underground stations, underground transportation hubs, underground substations, etc. all face the problem of deep foundation pit engineering.

[0003] The inspection of anchor (rod) cables is the guarantee to ensure the safety of foundation pits. In deep foundation pits or in geologically complex environments, the requirements for anchor cables are higher, the design length of anchor cables is longer, and the design tension value is larger. The following problems are often encountered during anchor cable pull-out tests:

[0004] 1. Due to the long design length of the anchor cable and the large design tension value, the ordinary anchor puller has reached the maximum range before reaching the specified test load;

[0005] 2. During the test, the anchor puller cannot be close to the reaction force device or the reaction force slips, resulting in insufficient range of the anchor puller.

[0006] When the range of the anchor puller is not enough, in order to meet the test requirements, it is generally necessary to replace it with an anchor puller with a larger range. However, the existing technology has the following disadvantages:

[0007] 1. The large-scale pulling instrument is relatively bulky, difficult to install manually, and requires mechanical coordination;

[0008] 2. Large-range pulling instruments often need to be customized, and the customization cycle is long, which can easily delay the construction period. Utility Model Content

[0009] The utility model aims to provide a pulling test device for an anchor cable or an anchor rod, which has the advantages of simple structure, convenient use and suitable for designing anchor cables or anchor rods with larger pulling force values.

[0010] In order to achieve the above purpose, the solution of the utility model is:

[0011] A pulling test device for an anchor cable or an anchor rod, comprising a base support, at least one intermediate support, a top support, an anchor and at least two portable pulling instruments;

[0012] The portable pulling instrument comprises a hollow jack, and the hollow jack comprises a lifting cylinder and an outer sleeve arranged inside and outside;

[0013] The base bracket has a base bracket through hole; the middle bracket has a middle bracket through hole; the top bracket has a top bracket through hole;

[0014] A first hollow jack is clamped between the base bracket and the middle bracket, and a second hollow jack is clamped between the middle bracket and the top bracket;

[0015] The base support through hole, the middle support through hole, the top support through hole and the two hollow jacks are coaxially arranged;

[0016] The base bracket is installed on the reaction beam, and the anchor cable or anchor rod passes through the base bracket through hole, the first hollow jack, the middle bracket through hole, the second hollow jack and the top bracket through hole in sequence, and then connects with the anchor located on the top of the top bracket.

[0017] Furthermore, the upper portion of the through hole of the base bracket has a radially outward-expanding outer sleeve slot; the lower portion of the through hole of the intermediate bracket has a radially outward-expanding lifting cylinder slot, and the upper portion of the through hole of the intermediate bracket has a radially outward-expanding outer sleeve slot; the lower portion of the through hole of the top bracket has a radially outward-expanding lifting cylinder slot; the lifting cylinder and outer sleeve of each hollow jack are respectively clamped in the lifting cylinder slot and the outer sleeve slot.

[0018] Furthermore, a leveling base is provided at the bottom of the base bracket, a leveling base through hole is provided in the middle of the leveling base, an arc-shaped groove is provided on the top of the leveling base through hole, and a protrusion is provided at the bottom of the base bracket to be clamped in the arc-shaped groove; the leveling base through hole is coaxial with the base bracket through hole.

[0019] Furthermore, the top surface of the base bracket is provided with a baffle rod assembly consisting of a plurality of circumferentially spaced baffle rods surrounding the outer circumference of the outer sleeve of the jack; the bottom surface and top surface of the intermediate bracket and the bottom surface of the top bracket are also provided with a baffle rod assembly; the baffle rods of the base bracket and the baffle rods on the lower side of the intermediate bracket are circumferentially spaced from each other; the baffle rods on the upper side of the intermediate bracket and the baffle rods on the top bracket are circumferentially spaced from each other; the length of the baffle rods is not longer than the height of the outer sleeve.

[0020] Furthermore, the baffle rod assembly includes eight baffle rods, and adjacent baffle rods are circumferentially spaced 45° apart; the baffle rods are long square steel bars.

[0021] Furthermore, the anchor comprises an anchor plate and a clip. The anchor plate is provided with an anchor hole for the anchor cable or anchor rod to pass through, and the clip is a conical clip that fits in the anchor hole.

[0022] Furthermore, there are more than two intermediate brackets, and the number of the portable pulling instruments is one more than the number of the intermediate brackets; each intermediate bracket is sequentially spaced between the base bracket and the top bracket.

[0023] Furthermore, the portable pulling instrument also includes a pump body and an oil pipe, and the pump body is connected to the hollow jack through the oil pipe.

[0024] Furthermore, the base support, the middle support and the top support are all made of a steel plate with a thickness of 30 mm and a length and width of 300 mm; the radius of the through hole of the base support, the through hole of the middle support and the through hole of the top support is 50 mm.

[0025] After adopting the above technical solution, when the range of a single small-range puller is insufficient, the brackets of the above-mentioned pull-out test device are connected in series with at least two hollow jacks of existing lightweight small-range pullers, so that the ranges of the two pullers are superimposed, and the pull-out test of anchor rods or cables with longer design lengths and larger tensile values ​​can be achieved. Moreover, the number of pullers can be increased or decreased at any time according to the on-site conditions, which is more convenient for on-site construction and installation than the existing large-range and bulky pullers. There is no need to customize large-range pullers, and construction and testing can be carried out in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a splicing process of an embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of an embodiment of the utility model after splicing;

[0028] Figure 3 A side view of a leveling base according to an embodiment of the present utility model;

[0029] Figure 4 A top view of a leveling base according to an embodiment of the utility model;

[0030] Figure 5 A side view of a base bracket according to an embodiment of the present utility model;

[0031] Figure 6 A top view of a base bracket according to an embodiment of the utility model;

[0032] Figure 7 A side view of an intermediate bracket according to an embodiment of the present utility model;

[0033] Figure 8 A top view of an intermediate bracket according to an embodiment of the present utility model;

[0034] Fig. 9 A side view of a top bracket according to an embodiment of the present utility model;

[0035] Fig.10 It is a top view of the top bracket of an embodiment of the utility model.

[0036] Explanation of reference numerals: pulling test device 10, leveling base 1, leveling base through hole 11, arc-shaped groove 12, base bracket 2, base bracket through hole 21, protrusion 22, intermediate bracket 3, intermediate bracket through hole 31, top bracket 4, top bracket through hole 41, anchor 5, anchor plate 51, anchor hole 511, clip 52, portable pulling instrument 6, hollow jack 61, lifting cylinder 611, outer sleeve 612, outer sleeve slot 71, lifting cylinder slot 72, baffle rod assembly 8, baffle rod 81, reaction beam 20, anchor cable or anchor rod 30. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] like Figures 1 to 10 As shown, a pulling test device 10 for an anchor cable or an anchor rod of the utility model comprises a base support 2, at least one intermediate support 3, a top support 4, an anchor 5 and at least two portable pulling instruments 6.

[0039] The portable puller 6 includes a hollow jack 61, a pump body (not shown) and an oil pipe (not shown), and the pump body is connected to the hollow jack 61 through the oil pipe. The hollow jack 61 includes a lifting cylinder 611 and an outer sleeve 612 arranged inside and outside; the lifting cylinder 611 moves up and down in the outer sleeve 612 under the action of the pump body. The portable puller 6 of this embodiment refers to an existing puller structure that can be moved by manpower without mechanical adjustment, so as to facilitate assembly operation.

[0040] The base support 2 has a base support through hole 21; the intermediate support 3 has an intermediate support through hole 31; the top support 4 has a top support through hole 41; the first hollow jack 61 is clamped between the base support 2 and the intermediate support 3, and the second hollow jack 61 is clamped between the intermediate support 3 and the top support 4; the base support through hole 21, the intermediate support through hole 31 and the top support through hole 41 and the two hollow jacks 61 are coaxially arranged.

[0041] The base bracket 2 is installed on the reaction beam 20, and the anchor cable or anchor rod 30 passes through the base bracket through hole 21, the first hollow jack 61, the middle bracket through hole 31, the second hollow jack 61 and the top bracket through hole 41 in sequence, and then connects with the anchor 5 located on the top of the top bracket 4.

[0042] Thus, when the range of a single small-range puller is insufficient, the brackets of the pull-out test device 10 are connected in series with at least two hollow jacks 61 of a small-range puller (generally, a small-range puller is also a light puller), so that the ranges of the two pullers are superimposed, and the pull-out test of anchor rods or anchor cables with a long design length and a large tension value can be achieved. Moreover, the number of pullers can be increased or decreased at any time according to the on-site conditions, which is more convenient for on-site construction and installation.

[0043] Specifically, the number of the intermediate brackets 3 can be more than two, and the number of the corresponding light pullers 6 is always one more than the number of the intermediate brackets 3, that is, more than three; and the intermediate brackets 3 are sequentially spaced between the base bracket 2 and the top bracket 4. By increasing the number of intermediate brackets 3 and light pullers 6, a simple increase in the measuring range can be achieved.

[0044] In order to ensure convenient installation, the hollow jack 61 of each portable puller 6 can be accurately coaxial and not eccentric. Figure 5 and Figure 6 As shown, a radially outwardly expanding outer sleeve slot 71 may be provided on the upper portion of the base support through hole 21; Figure 7 and Figure 8 As shown, the lower part of the intermediate bracket through hole 31 has a radially outward-expanding lifting cylinder slot 72, and the upper part of the intermediate bracket through hole 31 has a radially outward-expanding outer sleeve slot 71; Fig. 9 and Fig.10 As shown, the lower part of the top bracket through hole 41 has a radially outwardly expanding lifting cylinder slot 72.

[0045] See Figure 2 , so that the lifting cylinder 611 and the outer sleeve 612 of each hollow jack 61 are respectively adapted to be clamped in the lifting cylinder slot 72 and the outer sleeve slot 71 up and down. Whereby, when the pulling test device 10 is assembled, the hollow jack 61 can be quickly aligned and clamped with the base bracket 2, the middle bracket 3 and the top bracket 4, which ensures the coaxiality and also strengthens the connection stability of each component.

[0046] like Figures 1 to 4 As shown, in this embodiment, a leveling base 1 is further provided at the bottom of the base bracket 2, and the leveling base 1 can be made of a steel plate with a thickness of 70 mm, a length of 300 mm and a width of 300 mm. A leveling base through hole 11 is provided in the middle of the leveling base 1, and an arc-shaped groove 12 is provided at the top of the leveling base through hole 11. A protrusion 22 that is stuck in the arc-shaped groove 12 is provided at the bottom of the base bracket 2; the leveling base through hole 11 is coaxial with the base bracket through hole 21; the leveling base 1 can be used to enhance the stability of the base bracket 2, and the protrusion 22 is provided to cooperate with the arc-shaped groove 12 to make the two more closely combined and more consistent.

[0047] The base support 2, the middle support 3 and the top support 4 can all be made of a steel plate with a thickness of 30 mm and a length and width of 300 mm. The respective through holes can be set with a radius of 50 mm. The bottom surface of the steel plate of the base support 2 is protruded with the protrusion 22, which can be 40 mm high and the arc radius can be 275 mm.

[0048] At the same time, the top surface of the base bracket 2 is provided with a baffle rod assembly 8 consisting of a plurality of circumferentially spaced baffle rods 81 around the outer circumference of the jack outer sleeve 612. The baffle rod assembly 8 in this embodiment may include eight baffle rods 81, and adjacent baffle rods 81 are circumferentially spaced 45°; and the baffle rods 81 may be long square steel bars.

[0049] The bottom surface and the top surface of the intermediate bracket 3 and the bottom surface of the top bracket 4 are also provided with a baffle rod assembly 8; the baffle rods 81 of the base bracket 2 and the baffle rods 81 on the lower side of the intermediate bracket 3 are circumferentially spaced from each other; the baffle rods 81 on the upper side of the intermediate bracket 3 and the baffle rods 81 on the top bracket 4 are circumferentially spaced from each other; the length of the baffle rod 81 is not longer than the height of the outer sleeve 612.

[0050] Therefore, a baffle rod assembly 8 is provided, and each baffle rod 81 is tightly attached to the hollow jack 61, so as to strengthen the positioning of the hollow jack 61 and improve the coaxiality of each hollow jack 61. Moreover, when the reaction beam 20 is an inclined surface or a vertical surface, each baffle rod assembly 8 can also support the hollow jack 61 during installation, so as to facilitate the splicing and assembly of the pulling test device 10.

[0051] like Figure 2 As shown, the anchor 5 is an existing structure, including an anchor plate 51 and a clip 52. The anchor plate 51 is provided with an anchor hole 511 for the anchor cable or anchor rod 30 to pass through, and the clip 52 is a conical clip 52 that matches the anchor hole 511. In this embodiment, two side-by-side anchor cables or anchor rods 30 are provided to pass through the pull-out test device 10 at the same time.

[0052] The working principle of the utility model can be as follows:

[0053] (1) During the test, the theoretical elongation of the anchor cable or anchor rod 30 is first calculated to determine whether to use the pull-out test device 10;

[0054] (2) Splicing: First install the leveling base 1 on the reaction beam 20, then install the base bracket 2 on the leveling base 1, and then install the first hollow jack 61, and push the lifting tube 611 of the first hollow jack 61 out by 3cm-5cm, and then place the middle bracket 3 on the top of the first hollow jack 61, and then install the second hollow jack 61, and push the lifting tube 611 of the second hollow jack 61 out by 3cm-5cm, and finally install the top bracket 4 on the top of the second hollow jack 61, and fix the anchor 5 on the top bracket 4 and the anchor cable or anchor rod 30.

[0055] (3) After assembly, ensure that there is space between the barrier rods 81 of each barrier rod assembly 8.

[0056] (4) By using the pump bodies of the two lightweight pullers 6 to control the operation of the hollow jack 61, a large range of pull-out force tests can be performed.

[0057] In summary, the utility model can conveniently and quickly increase the measuring range by setting various brackets to coaxially connect the hollow jacks 61 of more than two lightweight pulling instruments 6 into one, and meet the pulling force test requirements of anchor cables and anchor rods with longer design lengths and larger design tension values.

[0058] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0059] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0060] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0061] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Claims

1. A pull-out test device for an anchor cable or an anchor rod, characterized in that: It includes a base support, at least one intermediate support, a top support, an anchor and at least two portable pullers; The portable pulling instrument comprises a hollow jack, and the hollow jack comprises a lifting cylinder and an outer sleeve arranged inside and outside; The base bracket has a base bracket through hole; the middle bracket has a middle bracket through hole; the top bracket has a top bracket through hole; A first hollow jack is clamped between the base bracket and the middle bracket, and a second hollow jack is clamped between the middle bracket and the top bracket; The base support through hole, the middle support through hole, the top support through hole and the two hollow jacks are coaxially arranged; The base bracket is installed on the reaction beam, and the anchor cable or anchor rod passes through the base bracket through hole, the first hollow jack, the middle bracket through hole, the second hollow jack and the top bracket through hole in sequence, and then connects with the anchor located on the top of the top bracket.

2. A pull-out test device for an anchor cable or an anchor rod according to claim 1, characterized in that: The upper portion of the through hole of the base bracket has a radially outward-expanding outer sleeve slot; the lower portion of the through hole of the intermediate bracket has a radially outward-expanding lifting cylinder slot, and the upper portion of the through hole of the intermediate bracket has a radially outward-expanding outer sleeve slot; the lower portion of the through hole of the top bracket has a radially outward-expanding lifting cylinder slot; the lifting cylinder and outer sleeve of each hollow jack are respectively clamped in the lifting cylinder slot and the outer sleeve slot.

3. A pull-out test device for an anchor cable or an anchor rod according to claim 1, characterized in that: A leveling base is also provided at the bottom of the base bracket, a leveling base through hole is provided in the middle of the leveling base, an arc-shaped groove is provided on the top of the leveling base through hole, and a protrusion that is stuck in the arc-shaped groove is convexly provided at the bottom of the base bracket; the leveling base through hole is coaxial with the base bracket through hole.

4. A pull-out test device for an anchor cable or an anchor rod according to claim 1, characterized in that: The top surface of the base bracket is provided with a baffle rod assembly consisting of a plurality of circumferentially spaced baffle rods surrounding the outer circumference of the outer sleeve of the jack; the bottom surface and top surface of the intermediate bracket and the bottom surface of the top bracket are also provided with a baffle rod assembly; the baffle rods of the base bracket and the baffle rods on the lower side of the intermediate bracket are circumferentially spaced from each other; the baffle rods on the upper side of the intermediate bracket and the baffle rods on the top bracket are circumferentially spaced from each other; the length of the baffle rods is not longer than the height of the outer sleeve.

5. A pull-out test device for an anchor cable or an anchor rod according to claim 4, characterized in that: The baffle rod assembly comprises eight baffle rods, and adjacent baffle rods are spaced 45 degrees apart in the circumferential direction; the baffle rods are long square steel bars.

6. A pull-out test device for an anchor cable or an anchor rod according to claim 1, characterized in that: The anchor comprises an anchor plate and a clip. The anchor plate is provided with an anchor hole for the anchor cable or anchor rod to pass through, and the clip is a conical clip matched with the anchor hole.

7. A pull-out test device for an anchor cable or an anchor rod according to claim 1, characterized in that: There are more than two intermediate brackets, and the number of the portable pullers is one more than the number of the intermediate brackets; each intermediate bracket is sequentially spaced between the base bracket and the top bracket.

8. A pull-out test device for an anchor cable or an anchor rod according to claim 1, characterized in that: The portable pulling instrument also includes a pump body and an oil pipe, and the pump body is connected to the hollow jack through the oil pipe.

9. A pull-out test device for an anchor cable or an anchor rod according to claim 1, characterized in that: The base support, the middle support and the top support are all made of a steel plate with a thickness of 30 mm and a length and width of 300 mm; the radius of the through hole of the base support, the through hole of the middle support and the through hole of the top support is 50 mm.

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