Single-pile pull-out test construction device

Abstract

The utility model discloses a single pile pull-out test construction device which comprises an adapter plate, a plurality of conical anchor holes are formed in the adapter plate, and clamping pieces which are matched with the conical anchor holes and used for clamping pile foundation steel bars are arranged in the conical anchor holes in advance. The leveling mechanism is arranged on the adapter plate and is used for leveling the adapter plate; the force applying mechanism is connected with the adapter plate through a connecting assembly and used for providing vertical drawing force for the adapter plate; according to the single-pile anti-pulling test construction device, the detection construction efficiency can be improved to a certain degree, meanwhile, the detection construction quality can be improved, and the risks that a pile head is damaged, and the deviation of an anti-pulling pile test detection value is too large or experimental data is distorted are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation detection in construction engineering, and particularly relates to a construction device for single-pile uplift test. Background Technique

[0002] The single-pile vertical uplift static load test device is an important item for detecting reinforced concrete piles in construction engineering. By detecting, the ultimate uplift bearing capacity of a single pile is determined to judge whether the vertical uplift bearing capacity meets the design specifications. In the single-pile vertical uplift force loading experiment, in order to apply the uplift force upward conveniently, it is necessary to fix the steel bars protruding above the single pile to the loading device, and then apply the uplift force through the jack force application mechanism. In the prior art, generally, the pulling steel bars extend downward from the loading device and are welded and fixed to the pile foundation steel bars one by one, or the corresponding two steel bars are butt-jointed and fixed through steel bar anchors. In order to ensure the relatively uniform transmission of the pulling force to the pile foundation, each pile foundation steel bar needs to be butt-jointed and fixed. However, due to the limited space between adjacent pile foundation steel bars, whether it is welding or butt-jointing and fixing with anchors, the operation is inconvenient. Coupled with the poor control of the perpendicularity of the pile foundation steel bars, the length uniformity of each load transfer rod cannot be well guaranteed, the forces and displacements borne by the pile foundation steel bars are inconsistent, and further, the uniformity of the force transmission after butt-jointing cannot be guaranteed, easily leading to the situation of the pile head being pulled apart, or the deviation of the test detection value of the uplift pile being too large or the experimental data being distorted. In addition, whether it is welding or butt-jointing construction with anchors, the connection construction efficiency is relatively low, and the subsequent disassembly is very inconvenient. After the detection, the steel bars need to be cut, which further slows down the construction progress of the entire construction process.

[0003] Therefore, it is urgent to develop and design a new construction device for single-pile uplift test, hoping to improve the detection construction efficiency to a certain extent, and at the same time improve the quality of the detection construction, reduce the risk of pile head damage and the deviation of the test detection value of the uplift pile being too large or the experimental data being distorted. Content of the Utility Model

[0004] In view of this, the utility model aims to provide a construction device for single-pile uplift test, which can improve the detection construction efficiency to a certain extent, and at the same time improve the quality of the detection construction, reduce the risk of pile head damage and the deviation of the test detection value of the uplift pile being too large or the experimental data being distorted.

[0005] To achieve the above object, the utility model provides the following technical solution: A construction device for single-pile uplift test, comprising: a transfer plate, the transfer plate is provided with a plurality of tapered anchor holes, and clamping pieces for clamping the pile foundation steel bars and fitting with the tapered anchor holes are preset in the tapered anchor holes; a leveling mechanism, arranged on the transfer plate and used for leveling the transfer plate; a force application mechanism, connected with the transfer plate through a connecting component and used for providing a vertical pulling force for the transfer plate.

[0006] Further, the leveling mechanism includes four groups of lift-adjustable rods respectively arranged at the four corners of the adapter plate.

[0007] Further, the bottom of the lift-adjustable rod is spherical.

[0008] Further, the force-applying mechanism includes a support beam arranged at the top of the adapter plate, a jack arranged at both ends of the support beam for propping up the support beam and providing a jacking force, and a support plate arranged in the middle of the support beam; the connection assembly includes two connecting plates respectively arranged at the transverse two ends of the support plate, the upper end of the connecting plate is fixed to the support plate, and the lower end of the connecting plate is fixed to the adapter plate.

[0009] Further, at the transverse two ends of the support plate, there are respectively arranged clamping holes Ⅰ which are arranged along the length direction of the support beam and have an opening at one end, the adapter plate is provided with clamping holes Ⅱ which are vertically aligned with the clamping holes Ⅰ, the connecting plate is an I-shaped plate, and the upper and lower parts of the web of the I-shaped plate are respectively clamped in the clamping holes Ⅰ and the clamping holes Ⅱ.

[0010] Further, at the opening ends of the clamping holes Ⅰ and the clamping holes Ⅱ, there are arranged limit members for preventing the connecting plate from slipping off, the connecting plate is provided with strip-shaped holes for the limit members to pass through, the strip-shaped holes are vertically arranged, and the limit members respectively seal the opening ends of the clamping holes Ⅰ and the clamping holes Ⅱ.

[0011] Further, a limit plate is arranged at the bottom of the support plate and is externally clamped on the transverse two sides of the support beam.

[0012] Further, the support beam, the support plate, the adapter plate and the connecting plate are all provided with lifting lugs.

[0013] Further, a plurality of weight-reducing holes are uniformly arranged on the connecting plate.

[0014] Further, a pressing mechanism is further included, the pressing mechanism includes a telescopic cylinder arranged at the bottom end of the middle part of the support beam, and a pressing plate which can press the adapter plate is fixedly connected to the telescopic end of the telescopic cylinder.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The single-pile uplift test construction device provided by the utility model indirectly connects the pile foundation steel bars and the force application mechanism through an adapter plate. The adapter plate can be leveled by a leveling mechanism and then connected to the pile foundation steel bars. Since the pile foundation steel bars are locked to the adapter plate through the wedge grips preset in the conical anchor holes, it is beneficial to ensure that the connection points of each pile foundation steel bar and the adapter plate are basically at the same horizontal position, which is beneficial to ensuring the uniform stress of each pile foundation steel bar. Since the adapter plate can be leveled and then connected to the force application mechanism, it can also ensure that the force application mechanism uniformly transmits the force to the adapter plate, which can effectively improve the quality of the detection construction, and at the same time reduce the risk of damage to the pile head and excessive deviation of the uplift pile test detection value or distortion of the test data. Of course, such a structure can effectively improve the construction efficiency because there is no need to dock the pile foundation steel bars and the tension bars of the force application mechanism one by one. Moreover, since the adapter plate can be connected to the pile foundation steel bars separately in advance, the installation space is large and the operation is convenient. And since the conical anchor holes are directly set on the adapter plate, when disassembling, only need to press down the adapter plate to complete the one-time disassembly of the adapter plate, which also improves the construction efficiency. Of course, this structural form does not require cutting the pile foundation steel bars later, which can reduce the damage to the pile head.

[0017] Other advantages, objectives and features of the utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following specification. Brief Description of the Drawings

[0018] Figure 1 Is the axonometric structural schematic diagram of the utility model

[0019] Figure 2 Is the front view structural schematic diagram of the utility model in the use state

[0020] Figure 3 Is the cross-sectional structural schematic diagram of the utility model in the use state

[0021] Figure 4 Is Figure 3 The partial enlarged view at B in

[0022] Figure 5 Is the exploded structural schematic diagram of the utility model

[0023] Reference numerals: 1 - adapter plate; 101 - conical anchor hole; 102 - wedge; 103 - clamping hole II; 2 - leveling mechanism; 201 - liftable adjusting rod; 3 - force - applying mechanism; 301 - support beam; 302 - jack; 303 - support plate; 303a - clamping hole I; 303b - limiting plate; 4 - connecting assembly; 401 - connecting plate; 401a - strip hole; 401b - weight - reducing hole; 5 - pile foundation steel bar; 6 - limiting member; 7 - lifting lug; 8 - pressing mechanism; 801 - telescopic cylinder; 802 - pressing plate; 9 - load - bearing block. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Please refer to Figure 1-2 , this embodiment discloses a single - pile uplift test construction device, including: an adapter plate 1, the adapter plate 1 is provided with a plurality of conical anchor holes 101, and wedge 102 that fits with the conical anchor holes 101 and is used for clamping the pile foundation steel bar 5 is preset in the conical anchor holes 101. Here, the clamping of the pile foundation steel bar 5 and the adapter plate 1 is completed by using the principle of steel bar anchor (i.e., the friction self - locking principle). During use, after the pile foundation steel bar 5 passes through the conical anchor hole 101, only the wedge 102 needs to be pre - tightened in the conical anchor hole 101. The wedge 102 has the same design structure as the traditional steel bar anchor. Spiral grooves can be designed on the wedge 102 to enhance the friction force. After the force - applying mechanism 3 applies the pulling force, the wedge 102 will reliably lock the pile foundation steel bar 5. It can be known that the positions of the plurality of conical anchor holes 101 are designed to be aligned with the positions of the pile foundation steel bars 5;

[0026] A leveling mechanism 2, which is arranged on the adapter plate 1 and is used for leveling the adapter plate 1. The leveling mechanism 2 is preferably composed of a plurality of adjusting rods with adjustable heights, and can cooperate with a level gauge, etc. to determine whether the adapter plate 1 is horizontal. By designing the leveling mechanism 2, it can be ensured that during the installation process of the adapter plate 1, the connection points of each pile foundation steel bar 5 and the adapter plate 1 are in a relatively horizontal position;

[0027] A force - applying mechanism 3, which is connected to the adapter plate 1 through a connecting assembly 4 and is used to provide a vertical pulling force for the adapter plate 1. The force - applying mechanism 3 usually uses a jack as a power source to provide a vertical pulling force for the adapter plate 1;

[0028] In the above structural design, the indirect connection between the pile foundation steel bar 5 and the force-applying mechanism 3 is completed through the adapter plate 1, and the adapter plate 1 can be connected to the pile foundation steel bar 5 after being leveled by the leveling mechanism 2. Since the pile foundation steel bar 5 is locked with the adapter plate 1 through the clip 102 preset in the conical anchor hole 101, it is beneficial to ensure that the connection point between each pile foundation steel bar 5 and the adapter plate 1 is basically at the same horizontal position, which is beneficial to ensure the uniformity of the force of each pile foundation steel bar 5. Since the adapter plate 1 can be connected to the force-applying mechanism 3 after leveling, it can also ensure that the force-applying mechanism 3 transmits force to the adapter plate 1 evenly, which can effectively improve the quality of the detection construction. The amount can be reduced, and the risk of damage to the pile head and excessive deviation in the test value of the pull-out pile test or distortion of the experimental data can be reduced. Of course, such a structure can effectively improve the construction efficiency because there is no need to connect the pile foundation steel bars 5 with the pull-out steel bars of the force-applying mechanism 3 one by one, and because the adapter plate 1 can be connected to the pile foundation steel bars 5 separately in advance, the installation space is large enough and the operation is convenient. And because the conical anchor hole 101 is directly provided on the adapter plate 1, when disassembling, it is only necessary to press down the adapter plate 1 to complete the one-time disassembly of the adapter plate 1, which also improves the construction efficiency. Of course, this structural form does not require the pile foundation steel bars 5 to be cut later, which can reduce damage to the pile head.

[0029] In this embodiment, the leveling mechanism 2 includes four groups of liftable adjustable rods 201 respectively arranged at the four corners of the adapter plate 1. More specifically, the liftable adjustable rods 201 are adjustable screws, and the adjustable screws are fixedly connected to the adapter plate 1 through nuts. By designing four groups of liftable adjustable rods 201, it is beneficial to ensure that a stable support is formed for the adapter plate 1, and it is beneficial to ensure the stability of the adapter plate 1 after leveling, and then it is beneficial to ensure the stable pre-tightening of the clip 102, that is, while ensuring the leveling function, it can also reduce the displacement of the adapter plate 1 during the pre-tightening of the clip 102, which is beneficial to further ensure that the connection points of the pile foundation steel bars 5 and the adapter plate 1 are in the same horizontal plane, thereby improving the detection quality.

[0030] In this embodiment, the bottom of the liftable adjustable rod 201 is spherical. Since the top surface flatness of the pile head is usually not high, the bottom of the liftable adjustable rod 201 is designed to be spherical, which can facilitate the stable support of each liftable adjustable rod 201 on the pile head, further improving the reliability of use.

[0031] In this embodiment, the force application mechanism 3 includes a support beam 301 disposed on the top of the adapter plate 1, a jack 302 disposed at both ends of the support beam 301 for propping up the support beam 301 and providing a jacking force, and a support plate 303 disposed in the middle of the support beam 301. Specifically, the support beam 301 is preferably an I-beam with good bending resistance, and the jack 302 is preferably a hydraulic jack. The connection assembly 4 includes two connecting plates 401 respectively disposed at the transverse two ends of the support plate 303. "Transverse" refers to the width direction of the support beam 301. The upper end of the connecting plate 401 is fixed to the support plate 303, and the lower end of the connecting plate 401 is fixed to the adapter plate 1. The fixing methods of the connecting plate 401 to the support plate 303 and the adapter plate 1 are not limited, such as welding fixation, etc. The implementation principle is as follows: the jack 302 provides a jacking force to the support beam 301, the support beam 301 transmits the force to the support plate 303, the support plate 303 then transmits the force to the adapter plate 1 through the connecting plate 401, and the adapter plate 1 finally transmits the force to the pile foundation steel bar 5. In this structural design, since the support plate 303 is connected to the adapter plate 1 through the connecting plate 401, the connection is convenient, and the connection between the plates is reliable. Since the connecting plate 401 is designed at the transverse two ends of the support plate 303, this structure is conducive to further ensuring the force transmission uniformity and reliability between the support plate 303 and the connecting plate 401, and is beneficial to further improving the authenticity of the detection results.

[0032] In this embodiment, at the transverse two ends of the support plate 303, there are respectively provided clamping holes Ⅰ 303a arranged along the length direction of the support beam 301 and having one end open. The support plate 303 is provided with clamping holes Ⅱ 103 which are vertically aligned with the clamping holes Ⅰ 303a. The connecting plate 401 is an I-shaped plate, and the upper and lower parts of the web of the I-shaped plate are respectively clamped in the clamping holes Ⅰ 303a and the clamping holes Ⅱ 103. In the structural design of the support plate 303, the adapter plate 401 and the connecting plate 401, the installation is simple, which is beneficial to further improving the construction and installation efficiency. During use, it only needs to slide the connecting plate 401 into the support plate 303 along the open ends of the clamping holes Ⅰ 303a and the clamping holes Ⅱ 103. The support plate 303 and the connecting plate 401 can be installed later, which is beneficial to ensuring that the adapter plate 1 has sufficient installation and operation space. The structural design of the I-shaped plate also ensures the overall structural strength, thus ensuring the reliability of force transmission.

[0033] In this embodiment, limiting members 6 for preventing the connecting plate 401 from slipping off are provided at the open ends of the clamping hole I 303a and the clamping hole II 103; the connecting plate 401 is provided with a strip-shaped hole 401a for the limiting member 6 to pass through, the strip-shaped hole 401a is arranged vertically, and the limiting members 6 respectively seal the open ends of the clamping hole I 303a and the clamping hole II 103; specifically, the limiting member 6 here is preferably a bolt, with a simple and reliable structure. Sealing the open ends of the clamping hole I 303a and the clamping hole II 103 is conducive to correspondingly improving the structural strength of the support plate 303 and the adapter plate 401, reducing the deformation during the pulling process of the support plate 303 and the adapter plate 401. In actual use, the limiting member 6 can be designed in multiple along the length directions of the clamping hole I 303a and the clamping hole II 103; by designing the limiting member 6, the use safety is improved, and at the same time, the structural strength of the support plate 303 and the adapter plate 401 is further enhanced.

[0034] In this embodiment, a limiting plate 303b is provided at the bottom of the support plate 303, which is externally clamped on the two lateral sides of the support beam 301 in the transverse direction; "transverse direction" means the width direction of the support beam 301; by designing the limiting plate 303b, it is conducive to the stable placement of the support plate 303 on the support beam 301, preventing the support plate 303 from slipping during the installation process, improving the use safety, and of course, to a certain extent, it can further improve the smoothness of force transmission.

[0035] In this embodiment, lifting lugs 7 are provided on the support beam 301, the support plate 303, the adapter plate 1 and the connecting plate 401, and one or more lifting lugs 7 can be designed according to needs; since the weights of all parts are relatively large, by designing the lifting lugs 7, it is conducive to the hoisting and installation of each component, thereby further improving the construction efficiency.

[0036] In this embodiment, a plurality of weight-reducing holes 401b are evenly arranged on the connecting plate 401; specifically, the weight-reducing holes 401b here are vertically arranged strip-shaped holes; by designing the weight-reducing holes 401b, it is conducive to the lightweight design.

[0037] In this embodiment, a pressing mechanism 8 is further included. The pressing mechanism 8 includes a telescopic cylinder 801 provided at the bottom end of the middle part of the support beam 301. The telescopic cylinder 801 can be fixedly installed on the support beam 301 by means of bolt connection or the like. The telescopic end of the telescopic cylinder 801 is fixedly connected with a pressing plate 802 that can press the adapter plate 1; preferably, the telescopic cylinder 801 here is a hydraulic cylinder; by designing the pressing mechanism 8, during the installation process of the adapter plate 1, the adapter plate 1 can be pressed, thereby preventing the displacement of the adapter plate 1, and further facilitating ensuring that the connection points of the pile foundation steel bars 5 are at the same horizontal position, ensuring that the displacement amounts of the pile foundation steel bars 5 are consistent, and further improving the smoothness of force transmission; of course, during later disassembly, the pressing mechanism 8 can be used to press the adapter plate 1 down smoothly, thereby completing the disassembly of the adapter plate 1, which is conducive to further improving the construction efficiency; it is also conducive to reducing the damage to the pile foundation steel bars 5.

[0038] The above single-pile uplift test construction device can be constructed according to the following construction steps: S1: Level the ground around the pile foundation, and lay multiple bearing blocks 9 around the pile foundation. By arranging the bearing blocks 9, it is possible to prevent the bottom surfaces at both ends of the support beam 301 from subsiding, avoid uneven force transmission during the force application process, and in order to facilitate observing the situation of the pile foundation surface, chisel the pile foundation that has not reached the designed elevation. Usually, the soil surface around the pile head is 150 mm - 200 mm lower than the chiseled surface of the pile head; S2: Straighten the pile head steel bars 5 and complete the installation of the adapter plate 1; S3: Use the leveling mechanism 2 to level the adapter plate 1; S4: Use the pressing mechanism 8 to press the adapter plate 1, and then pre-tighten the clamping pieces; S5: Install the force application mechanism 3. Installing the force application mechanism 3 later reserves enough operating space for the installation of the adapter plate 1; S6: Loosen the pressing mechanism 8, the force application mechanism 3 applies a pulling force to the adapter plate 1 to complete the single-pile uplift test detection, and accurately detects the maximum bearing capacity of the anti-floating pile and its mechanical parameters, and then it can be removed for detection at the next position; In the above-provided single-pile uplift test construction method, the construction efficiency is high. By using the interspersed cooperation of the leveling mechanism and the pressing mechanism, it is possible to effectively ensure the uniform force of each pile foundation steel bar, improve the quality of the detection construction, and reduce the risks of pile head damage, excessive deviation of the anti-pull pile test detection value, or distortion of experimental data.

[0039] Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A single pile pull-out test construction device, characterized in that: include: An adapter plate (1), the adapter plate (1) being provided with a plurality of conical anchor holes (101), wherein the conical anchor holes (101) are provided with clamping pieces (102) which match the conical anchor holes (101) and are used to clamp the pile foundation steel bars (5); A leveling mechanism (2) is arranged on the adapter plate (1) and is used to level the adapter plate (1); The force applying mechanism (3) is connected to the adapter plate (1) via a connecting assembly (4) and is used to provide a vertical pulling force for the adapter plate (1).

2. The single pile pull-out test construction device according to claim 1, characterized in that: The leveling mechanism (2) comprises four groups of liftable adjustment rods (201) respectively arranged at the four corners of the adapter plate (1).

3. The single pile pull-out test construction device according to claim 2 is characterized in that: The bottom of the liftable adjustable rod (201) is spherical.

4. The single pile pull-out test construction device according to claim 1, characterized in that: The force-applying mechanism (3) comprises a support beam (301) arranged on the top of the adapter plate (1), a jacking device (302) arranged at both ends of the support beam (301) for supporting the support beam (301) and providing a lifting force, and a support plate (303) arranged in the middle of the support beam (301); The connection assembly (4) comprises two connection plates (401) respectively arranged at the two lateral ends of the support plate (303); the upper end of the connection plate (401) is fixed to the support plate (303), and the lower end of the connection plate (401) is fixed to the adapter plate (1).

5. The single pile pull-out test construction device according to claim 4 is characterized in that: The support plate (303) is provided with a clamping hole I (303a) arranged along the length direction of the support beam (301) and open at one end at both transverse ends. The adapter plate (1) is provided with a clamping hole II (103) aligned with the clamping hole I (303a) up and down. The connecting plate (401) is an I-shaped plate, and the upper and lower parts of the web of the I-shaped plate are respectively correspondingly clamped in the clamping hole I (303a) and the clamping hole II (103).

6. The single pile pull-out test construction device according to claim 5, characterized in that: The opening ends of the clamping hole I (303a) and the clamping hole II (103) are both provided with a limiting piece (6) for preventing the connecting plate (401) from slipping off; the connecting plate (401) is provided with a strip hole (401a) for the limiting piece (6) to pass through, the strip hole (401a) is arranged vertically, and the limiting piece (6) respectively closes the opening ends of the clamping hole I (303a) and the clamping hole II (103).

7. The single pile pull-out test construction device according to claim 4 is characterized in that: The bottom of the support plate (303) is provided with a limiting plate (303b) which is clamped on both sides of the support beam (301) in the horizontal direction.

8. The single pile pull-out test construction device according to claim 4, characterized in that: The support beam (301), the support plate (303), the adapter plate (1) and the connecting plate (401) are all provided with lifting ears (7).

9. The single pile pull-out test construction device according to claim 4, characterized in that: The connecting plate (401) is evenly provided with a plurality of weight-reducing holes (401b).

10. The single pile pull-out test construction device according to claim 4, characterized in that: It also includes a clamping mechanism (8), the clamping mechanism (8) including a telescopic cylinder (801) arranged at the bottom end of the middle part of the support beam (301), the telescopic end of the telescopic cylinder (801) being fixedly connected to a pressing plate (802) capable of applying pressure to the adapter plate (1).

Images