Installation method and device for displacement rod and protection pipe used in self-balanced test of pile foundation

Abstract

The present invention discloses an installation method and device for a displacement rod and a protection tube used in a self-balanced test of a pile foundation. The device includes a steel reinforcement cage and a displacement rod and a protection tube arranged inside the steel reinforcement cage. The upper part of the displacement rod and the protection tube is loosely tied to the steel reinforcement cage with wire, and the lower part of the displacement rod and the protection tube is tightly tied to the steel reinforcement cage with wire. An S-shaped hook is hung at the lower part of the steel reinforcement cage, and the lower end of the S-shaped hook hooks the lower end of the displacement rod and the protection tube. When the steel reinforcement cage is hoisted, in the present invention, the upper part of the displacement rod and the protection tube is loosely tied to the steel reinforcement cage with wire, the lower end of the displacement rod and the protection tube is tightly tied to the steel reinforcement cage with wire, and at the same time, the lower end of the displacement rod and the protection tube is fixed with an S-shaped hook. In this way, the displacement rod and the protection tube can be effectively prevented from slipping, and the loose binding section at the upper part can avoid excessive lateral displacement of the displacement rod and the protection tube.

Description

Technical Field

[0001] The present invention relates to an installation method and device for a displacement rod and a protection pipe used in a pile foundation self-balancing test, belonging to the technical field of pile foundation self-balancing tests. Background Art

[0002] When conducting a pile foundation self-balancing test, the usual installation method for the displacement rod and the protection pipe is as follows: when the length of the steel reinforcement cage does not exceed a certain length, after welding multiple sections of the steel reinforcement cage, the displacement rod and the protection pipe are installed and then hoisted at one time. However, this installation method is likely to cause deformation and damage to the pipe fittings, increasing the construction and test costs, with a relatively high risk of test failure. Moreover, when the length of the pile foundation exceeds a certain length, it is difficult to carry out hoisting construction. Summary of the Invention

[0003] The purpose of the present invention is to provide an installation method and device for a displacement rod and a protection pipe used in a pile foundation self-balancing test, so as to reduce the installation difficulty of the displacement rod and the protection pipe, improve the test installation quality, and this method can be extended to the installation of sonic logging tubes for pile foundations.

[0004] To achieve the above purpose, the present invention adopts the following technical solution: an installation method for a displacement rod and a protection pipe used in a pile foundation self-balancing test, including the displacement rod and the protection pipe. After the plane positioning of the steel reinforcement cage, the upper parts of the displacement rod and the protection pipe are loosely tied to the steel reinforcement cage with iron wires, the lower parts of the displacement rod and the protection pipe are tightly tied to the steel reinforcement cage with iron wires, then the upper end of the S-shaped hook is hung on the lower part of the steel reinforcement cage, and the lower end of the S-shaped hook is hooked to the lower ends of the displacement rod and the protection pipe, so that the S-shaped hook serves as the lower support point of the displacement rod and the protection pipe; when connecting the steel reinforcement cages at the orifice of the pile hole, a wire tightener is used instead of the S-shaped hook, that is, the upper hook of the wire tightener is hung on the steel reinforcement cage, and at the same time, the lower hook of the wire tightener is used to hook the lower ends of the displacement rod and the protection pipe, and then the iron wires tied to the lower parts of the displacement rod and the protection pipe are untied and the S-shaped hook is removed. In this way, the displacement rod and the protection pipe can be lifted or lowered through the wire tightener, facilitating the connection of the displacement rod and the protection pipe.

[0005] In the above method, joints are added to the ends of the displacement rod and the protection pipe, and the binding positions of the iron wires are far from the joints.

[0006] In the above method, the S-shaped hook or the wire tightener is hung on the stirrups of the steel reinforcement cage.

[0007] Meanwhile, the present invention also provides an installation device for a displacement rod and a protection pipe used in a pile foundation self-balancing test, including a steel reinforcement cage and the displacement rod and the protection pipe arranged inside the steel reinforcement cage. The upper parts of the displacement rod and the protection pipe are loosely tied to the steel reinforcement cage with iron wires, the lower parts of the displacement rod and the protection pipe are tightly tied to the steel reinforcement cage with iron wires, and an S-shaped hook is hung on the lower part of the steel reinforcement cage, and the lower end of the S-shaped hook is hooked to the lower ends of the displacement rod and the protection pipe.

[0008] The above installation device further includes a wire tightener. The upper hook of the wire tightener is hung on the steel reinforcement cage, and the lower hook of the wire tightener hooks the lower ends of the displacement rod and the protection tube.

[0009] In the above installation device, the wire tightener adopts a Japanese multi-functional wire tightener with the model number QL-JXQ.

[0010] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0011] 1. When hoisting the steel reinforcement cage, in the present invention, the upper parts of the displacement rod and the protection tube are loosely tied to the steel reinforcement cage with iron wires, and the lower ends of the displacement rod and the protection tube are tightly tied to the steel reinforcement cage with iron wires. At the same time, the lower ends of the displacement rod and the protection tube are fixed with S-shaped hooks. In this way, it can effectively prevent the displacement rod and the protection tube from slipping, and the upper loose tying section can avoid excessive lateral displacement of the displacement rod and the protection tube. And because one end of the displacement rod and the protection tube is tightly tied and the rest parts are loosely tied, the displacement rod and the protection tube have a certain degree of freedom, which can avoid bending and damage of the displacement rod and the protection tube to a certain extent.

[0012] 2. When connecting the cages at the hole opening: Untie the tightly tied parts at the lower ends of the displacement rod and the protection tube to make the displacement rod and the protection tube have a certain degree of lateral freedom for the convenience of installation of the displacement rod and the protection tube; moreover, the tying points are far away from the joint position, which can avoid the upper and lower movement limitations of the displacement rod and the protection tube and affect the installation of the displacement rod and the protection tube; use a wire tightener to assist in the installation to avoid the situation that the weight of the displacement rod and the protection tube is too large to be lifted or lowered manually, eliminating potential safety hazards; the ends of the displacement rod and the protection tube are protected by joints, which can prevent the threads at the ends of the displacement rod and the protection tube from being damaged and affecting the test installation; and when connecting the cages at the hole opening, the perpendicularity of the displacement rod and the protection tube can be ensured.

[0013] 3. The present invention saves time and effort, is safe and reliable, has high installation quality, does not need to change the original construction process, can save the costs increased due to the change of the construction process, and this method can be applied to the installation of sonic logging tubes for pile foundations. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the tying structure of the displacement rod and the protection tube in the present invention;

[0015] Figure 2 It is a schematic diagram when the wire tightener is in use in the present invention.

[0016] Description of the reference numerals: 1 - displacement rod and protection tube, 2 - steel reinforcement cage, 3 - S-shaped hook, 4 - lower hook, 5 - wire tightener, 6 - stirrup, 7 - joint, 8 - iron wire, 9 - upper hook. Detailed Embodiments

[0017] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiments of the present invention: Please refer to Figure 1 and Figure 2 , an installation device for a displacement rod and a protection tube used in a self-balanced test of a pile foundation of the present invention, includes a steel reinforcement cage 2 and a displacement rod and a protection tube 1 arranged inside the steel reinforcement cage 2. The upper part of the displacement rod and the protection tube 1 is loosely tied to the steel reinforcement cage 2 with a wire 8, and the lower part of the displacement rod and the protection tube 1 is tightly tied to the steel reinforcement cage 2 with a wire 8. An S-shaped hook 3 is hung at the lower part of the steel reinforcement cage 2, and the lower end of the S-shaped hook 3 hooks the lower end of the displacement rod and the protection tube 1.

[0019] The above installation device further includes a wire tightener 5. The upper hook 9 of the wire tightener 5 is hung on the steel reinforcement cage 2, and the lower hook 4 of the wire tightener 5 hooks the lower end of the displacement rod and the protection tube 1. The wire tightener 5 adopts a Japanese-style multifunctional wire tightener of model QL-JXQ.

[0020] The working principle of the present invention:

[0021] After the plane of the steel reinforcement cage 2 is positioned, the upper part of the displacement rod and the protection tube 1 is loosely tied to the steel reinforcement cage 2 with a wire 8, the lower part of the displacement rod and the protection tube 1 is tightly tied to the steel reinforcement cage 2 with a wire 8, then the upper end of the S-shaped hook 3 is hung at the lower part of the steel reinforcement cage 2, and the lower end of the S-shaped hook 3 is hooked to the lower end of the displacement rod and the protection tube 1, so that the S-shaped hook 3 serves as the lower support point of the displacement rod and the protection tube 1; when connecting the steel reinforcement cages at the orifice of the steel reinforcement cage 2, the wire tightener 5 is used to replace the S-shaped hook 3, that is, the upper hook 9 of the wire tightener 5 is hung on the steel reinforcement cage 2, and at the same time, the lower hook 4 of the wire tightener 5 is used to hook the lower end of the displacement rod and the protection tube 1, and then the wire 8 tied to the lower part of the displacement rod and the protection tube 1 is untied and the S-shaped hook 3 is removed. In this way, the displacement rod and the protection tube 1 can be lifted or lowered through the wire tightener 5, which is convenient for connecting the displacement rod and the protection tube 1.

[0022] A joint 7 is added to the end of the above displacement rod and protection tube 1, and the binding position of the wire 8 is far from the joint 7 to prevent the binding wire 8 from jamming with the joint 7. When the displacement rod and the protection tube 1 are connected, the joint 7 on the displacement rod and the protection tube 1 is a direct joint of the corresponding model. When used as an end protection joint, it can be directly screwed. When connecting, waterproof tape should be wound and tightened.

[0023] The above S-shaped hook 3 or wire tightener 5 is hung on the stirrup 6 of the steel reinforcement cage 2. To ensure the reliability during connection, the upper and lower ends of the S-shaped hook 3 or the upper hook 9 and the lower hook 4 on the wire tightener 5 can be tied with wire 8.

[0024] In summary, during the hoisting of the steel reinforcement cage, in the present invention, the upper part of the displacement rod and the protective pipe 1 is loosely tied to the steel reinforcement cage 2 with wire 8, the lower end of the displacement rod and the protective pipe 1 is tightly tied to the steel reinforcement cage 2 with wire 8, and at the same time, the lower end of the displacement rod and the protective pipe 1 is fixed with an S-shaped hook 3, so as to effectively avoid the slipping of the displacement rod and the protective pipe 1, and the loosely tied upper section can avoid excessive lateral displacement of the displacement rod and the protective pipe 1. And because one end of the displacement rod and the protective pipe 1 is tightly tied and the rest parts are loosely tied, the displacement rod and the protective pipe 1 have a certain degree of freedom, which can avoid the bending failure of the displacement rod and the protective pipe 1 to a certain extent.

[0025] During the connection of the cage at the hole opening, the tightly tied part at the lower end of the displacement rod and the protective pipe 1 is untied, so that the displacement rod and the protective pipe 1 have a certain degree of lateral freedom to facilitate the installation of the displacement rod and the protective pipe 1; moreover, the tying point is far away from the joint 7 position, which can avoid the limitation of the up and down movement of the displacement rod and the protective pipe 1 and affect the installation of the displacement rod and the protective pipe 1; the wire tightener is used to assist in the installation to avoid the situation that the weight of the displacement rod and the protective pipe 1 is too large to be lifted or lowered manually, eliminating potential safety hazards; the end of the displacement rod and the protective pipe 1 is protected by the joint 7, which can avoid the damage of the thread at the end of the displacement rod and the protective pipe 1 and affect the test installation; and during the connection of the cage at the hole opening, the perpendicularity of the displacement rod and the protective pipe 1 can be ensured.

Claims

1. A method for installing a displacement rod and a protection pipe for a self-balanced pile foundation test, including a displacement rod and a protection pipe (1), characterized in that: After the plane positioning of the steel reinforcement cage (2), the upper part of the displacement rod and the protective pipe (1) and the steel reinforcement cage (2) are loosely tied with wire (8), and the lower part of the displacement rod and the protective pipe (1) and the steel reinforcement cage (2) are tightly tied with wire (8). Then, the upper end of the S-shaped hook (3) is hung on the lower part of the steel reinforcement cage (2), and the lower end of the S-shaped hook (3) is hooked on the lower end of the displacement rod and the protective pipe (1), so that the S-shaped hook (3) serves as the lower support point of the displacement rod and the protective pipe (1). When connecting the steel reinforcement cage (2) at the hole opening, a wire tightener (5) is used to replace the S-shaped hook (3), that is, the upper hook (9) of the wire tightener (5) is hung on the steel reinforcement cage (2), and at the same time, the lower hook (4) of the wire tightener (5) is used to hook the lower end of the displacement rod and the protective pipe (1). Then, the wire (8) tied to the lower part of the displacement rod and the protective pipe (1) is untied and the S-shaped hook (3) is removed. In this way, the displacement rod and the protective pipe (1) can be lifted or lowered through the wire tightener (5), which is convenient for connecting the displacement rod and the protective pipe (1).

2. The installation method of the displacement rod and the protection tube for the self-balanced test of pile foundation according to claim 1, characterized in that: A joint (7) is added to the end of the displacement rod and the protective pipe (1), and the binding position of the wire (8) is far from the joint (7).

3. The installation method of the displacement rod and the protection pipe for the self-balanced test of pile foundation according to claim 1, characterized in that: The S-shaped hook (3) or the wire tightener (5) is hung on the stirrup (6) of the steel reinforcement cage (2).

4. An installation device for a displacement rod and a protection tube used in a self-balanced test of a pile foundation, comprising a steel reinforcement cage (2) and a displacement rod and a protection tube (1) arranged inside the steel reinforcement cage (2), characterized in that: The upper part of the displacement rod and the protective pipe (1) and the steel reinforcement cage (2) are loosely tied with wire (8), the lower part of the displacement rod and the protective pipe (1) and the steel reinforcement cage (2) are tightly tied with wire (8). An S-shaped hook (3) is hung on the lower part of the steel reinforcement cage (2), and the lower end of the S-shaped hook (3) is hooked on the lower end of the displacement rod and the protective pipe (1). It also includes a wire tightener (5), the upper hook (9) of the wire tightener (5) is hung on the steel reinforcement cage (2), and the lower hook (4) of the wire tightener (5) is hooked on the lower end of the displacement rod and the protective pipe (1).

5. The installation device for the displacement rod and the protection pipe used in the self-balanced test of pile foundation, characterized in that: The wire tightener (5) uses a Japanese-style multifunctional wire tightener of model QL-JXQ.

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