Novel counter-force device for uplift pile static load test

Abstract

The utility model relates to the technical field of uplift pile static load tests, and discloses a novel counter-force device for uplift pile static load tests, which comprises a plate body and foundation pile main reinforcements, the plate body is provided with at least one open slot which is annularly and uniformly arranged, the open slots are matched with the foundation pile main reinforcements, the foundation pile main reinforcements are provided with reinforcing steel bar anchorage devices matched with the plate body, and the reinforcing steel bar anchorage devices are matched with the plate body. And the reinforcing steel bar anchorage devices are used for fixing the foundation pile main reinforcements in the open grooves. Compared with the prior art, the uplift pile static load test device has the advantages that the uplift pile static load test can be conveniently carried out, and the situation that the reinforcing steel bars are easy to break can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of static load test of pull-out piles, in particular to a novel reaction force device for static load test of pull-out piles. Background Art

[0002] With the development of the economy, more and more underground garages and underground spaces are being built in residential and public buildings. Due to the buoyancy of groundwater on buildings and other factors, more and more requirements are being placed on the pull-out resistance of building foundation piles. When designing the acceptance test of the base with pull-out parameters, it is necessary to conduct a single pile vertical pull-out bearing capacity test on such piles. The efficiency of the single pile vertical pull-out bearing capacity test will directly affect the progress of on-site construction.

[0003] In the current single pile vertical pull-out static load test, the main reinforcement of the pile reinforcement cage is lengthened and welded to the reaction plate above the jack. This test method has the following disadvantages: 1. Double-sided welding is required for steel bar welding, and the welding length is not less than 5d (d is the diameter of the stress bar). When single-sided welding is used, the welding length is less than 10d, so the steel bar welding time is relatively long; 2. The welding technology levels of welders vary, which may cause steel bars to be damaged during welding. This will cause the steel bars to break easily at the weld damage point during the test, resulting in the termination of the test. After the test is terminated, the broken part needs to be reinforced and welded again, resulting in a long preparation time for the second test. Utility Model Content

[0004] (1) Technical problems solved

[0005] The technical problem to be solved by the present invention is that the current method adopted for the vertical pull-out static load test of a single pile leads to the problem of long preparation time due to welding, and steel bar breakage is easy to occur.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is: a new reaction force device for static load test of pull-out piles, including a plate body and main reinforcement of the foundation piles, the plate body is provided with at least one groove that is evenly arranged in a ring shape, the groove cooperates with the main reinforcement of the foundation piles, the main reinforcement of the foundation piles is provided with a steel anchor that cooperates with the plate body, and the steel anchor is used to fix the main reinforcement of the foundation piles in the groove.

[0008] As an improvement, the plate body is made of plain carbon steel.

[0009] As an improvement, the thickness of the plate is 3 cm, the outer diameter is 80 cm, and the inner diameter is 60 cm.

[0010] As an improvement, a reinforcing plate is welded to the lower end of the plate body.

[0011] As an improvement, the number of the slots is 16, and the width is 2.6-3.0 cm, which is used to fix the main reinforcement of the foundation pile with a diameter of 2.5 cm.

[0012] As an improvement, a hanging ring is provided at the upper end of the plate body.

[0013] (3) Beneficial effects

[0014] The advantages of the present invention over the prior art are that the present invention adopts a method of connecting the main reinforcement of the steel cage and the lengthened reinforcement and the reaction plate to replace the welding process or reduce the welding process, thereby eliminating the time consumed by the welding process and the uncertainty factors it brings, and can conduct tests more quickly and non-destructively, avoiding affecting the progress of on-site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a steel bar anchor and a reaction plate of a new reaction force device for static load test of pull-out piles.

[0016] Figure 2 The utility model is a front view of a reaction plate of a novel reaction device for static load test of pull-out piles.

[0017] Figure 3 The utility model is a bottom view of a reaction plate of a novel reaction device for static load test of pull-out piles.

[0018] As shown in the figure: 1. Plate body; 2. Lifting ring; 3. Slot; 4. Reinforcement plate; 5. Steel bar anchor; 6. Main reinforcement of foundation pile. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figure 1 、 Figure 2 and Figure 3As shown, a new reaction force device for static load test of pull-out piles includes a plate body 1 and pile main reinforcement 6. The plate body 1 is plain carbon steel, with a thickness of 3 cm, an outer diameter of 80 cm, and an inner diameter of 60 cm. The plate body 1 is provided with at least one groove 3 evenly arranged in a ring shape, and the groove 3 cooperates with the pile main reinforcement 6. The pile main reinforcement 6 is provided with a steel anchor 5 that cooperates with the plate body 1. The steel anchor 5 is used to fix the pile main reinforcement 6 in the groove 3. The number of the grooves 3 is 16, and the width is 2.6-3.0 cm. It is used to fix the pile main reinforcement 6 with a diameter of 2.5 cm. The number of steel anchors 5 is greater than the number of slots 3, which is convenient for later replacement.

[0022] Through the above structure, the main reinforcement 6 of the foundation pile can be fixed in the slot 3 by using the steel anchor 5, which is convenient for performing the static load test of the pull-out pile.

[0023] Example 2

[0024] like Figure 1 、 Figure 2 and Figure 3 As shown, a lifting ring 2 is provided at the upper end of the plate body 1, and the lifting ring 2 is used to facilitate the lifting of the plate body 1. A reinforcing plate 4 is welded at the lower end of the plate body 1, and the reinforcing plate 4 can improve the overall strength.

[0025] Through the above structure, the lifting ring 2 is used to facilitate the lifting and installation of the plate body 1.

[0026] During the specific implementation of the utility model, when the static load test of the pull-out pile is carried out, the main reinforcement of the foundation pile is passed through the slot, and the main reinforcement of the foundation pile is fixed in the slot by using the steel anchor. The steel anchor of appropriate specifications is selected according to the diameter of the main reinforcement of the foundation pile, and the reinforcement plate can increase the stress strength of the plate body. The use of the utility model in the static load test of the pull-out pile can improve the detection efficiency and continuity, and can avoid the situation that the test is terminated during the test and the fracture is re-reinforced and welded after the test is terminated, which causes the preparation time for the second test to be too long, thereby speeding up the progress of the construction project, and can improve the accuracy and reliability of the detection, and provide a strong guarantee for the quality and safety of the pile foundation project.

[0027] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0029] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A novel reaction force device for static load test of pull-out piles, characterized by: The invention comprises a plate body (1) and a main reinforcement of a foundation pile (6), wherein the plate body (1) is provided with at least one groove (3) uniformly arranged in a ring shape, wherein the groove (3) cooperates with the main reinforcement of the foundation pile (6), and the main reinforcement of the foundation pile (6) is provided with a steel anchor (5) that cooperates with the plate body (1), and the steel anchor (5) is used to fix the main reinforcement of the foundation pile (6) in the groove (3).

2. A novel reaction force device for static load testing of pull-out piles according to claim 1, characterized in that: The plate body (1) is made of plain carbon steel.

3. The novel reaction force device for static load test of pull-out piles according to claim 2, characterized in that: The plate body (1) has a thickness of 3 cm, an outer diameter of 80 cm, and an inner diameter of 60 cm.

4. The novel reaction force device for static load test of pull-out piles according to claim 3 is characterized by: A reinforcing plate (4) is welded to the lower end of the plate body (1).

5. The novel reaction force device for static load test of pull-out piles according to claim 1 is characterized by: The number of the slots (3) is 16, the width is 2.6-3.0 cm, and they are used to fix the main reinforcement (6) of the foundation pile with a diameter of 2.5 cm.

6. The novel reaction force device for static load test of pull-out piles according to claim 1, characterized in that: A hanging ring (2) is provided at the upper end of the plate body (1).

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