Pile foundation horizontal force corresponding displacement detection device

Abstract

The utility model discloses a pile foundation horizontal force corresponding displacement detection device which is characterized by comprising a top steel plate, a horizontal jack, a vertical jack, a foundation steel plate, a counter-force device and a displacement counting device, the foundation steel plate is horizontally fixed on the ground, and the top steel plate is used for pressing the top of a pile foundation. The lower end of the vertical jack is in sliding connection with the foundation steel plate, the upper end of the vertical jack is fixedly connected with the top steel plate, the counter-force device is arranged on the side edge of the pile foundation, and the horizontal jack is horizontally installed on the counter-force device and acts on the side face of the pile foundation during detection. The direction of acting force of the horizontal jack on the pile foundation is the same as the sliding direction of the vertical jack, and the displacement counting device is used for measuring displacement of the top steel plate. According to the utility model, the pile foundation detection time can be shortened, and the detection cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation horizontal force detection, and relates to a pile foundation horizontal force corresponding displacement detection device. Background Art

[0002] At present, pile foundations are widely used. The loads acting on pile foundations are mainly vertical loads. In special cases, horizontal loads must also be met. Taking arch bridge pile foundations as an example, reinforced concrete arch bridges will produce a large horizontal thrust at the arch foot, which has high requirements on the foundation and requires strict testing of the horizontal bearing capacity of the pile foundation.

[0003] If the pile foundation horizontal force test is carried out directly, a large error will occur, because when the arch bridge is in the completed state, the pile top is consolidated and has a large vertical force. Therefore, the existing method for detecting the horizontal force of the arch bridge requires first completing the casting of the pile foundation pedestal and piling loads on the pedestal to simulate the actual stress conditions and boundary conditions of the bridge.

[0004] The above existing methods for detecting the horizontal force of arch bridges have the following defects:

[0005] 1. It takes 28 days to reach the age after the foundation is poured, which results in a long time for testing;

[0006] 2. A large pile load is required, and the cap is irreversible. When the pile foundation test fails, the cap needs to be dismantled, resulting in great waste. Utility Model Content

[0007] The utility model aims to provide a pile foundation horizontal force corresponding displacement detection device, which can shorten the time for pile foundation detection and has low detection cost.

[0008] The purpose of the utility model is achieved through the following technical solutions:

[0009] A pile foundation horizontal force corresponding displacement detection device, characterized in that it includes a top steel plate, a horizontal jack, a vertical jack, a base steel plate, a reaction device and a displacement counting device, the base steel plate is horizontally fixed on the ground, the top steel plate is used to press on the top of the pile foundation, the lower end of the vertical jack is slidably connected to the base steel plate, the upper end of the vertical jack is fixedly connected to the top steel plate, the reaction device is arranged on the side of the pile foundation, the horizontal jack is horizontally installed on the reaction device, the horizontal jack acts on the side of the pile foundation during detection, the direction of the force applied by the horizontal jack to the pile foundation is the same as the sliding direction of the vertical jack, and the displacement counting device is used to measure the displacement of the top steel plate.

[0010] Furthermore, a sliding guide rail is provided on the foundation steel plate, the length direction of the sliding guide rail is the same as the direction of the force exerted by the horizontal jack on the pile foundation, and the lower end of the vertical jack is slidably connected with the sliding guide rail.

[0011] Furthermore, two parallel sliding guide rails are provided on the foundation steel plate, and the two parallel sliding guide rails are respectively located on two sides of the pile foundation.

[0012] Furthermore, the pile foundation horizontal force corresponding displacement detection device is provided with four vertical jacks, two vertical jacks are slidably installed on each sliding guide rail, and the four vertical jacks are distributed at the four corners of the pile foundation.

[0013] Furthermore, the pile foundation horizontal force corresponding displacement detection device also includes a reference rod, the reference rod is fixedly installed on the side of the pile foundation, and the displacement counting device is installed on the reference rod.

[0014] Further, the reaction device and the reference rod are respectively located on two opposite sides of the pile foundation.

[0015] Furthermore, the reaction device comprises a vertical column which is fixedly inserted into the ground.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] During the inspection, the utility model provides the pile foundation with the horizontal force required for the inspection through the horizontal jack, and indirectly detects the horizontal displacement of the pile foundation by detecting the displacement of the top steel plate through the displacement counting device. The vertical jack acts on the pile foundation through the top steel plate to provide vertical force for the pile foundation, simulating the vertical load to replace the vertical force of the cap and the load on the cap on the pile foundation, so that the utility model does not need to cast the cap during the inspection of the pile foundation, which can shorten the time for pile foundation inspection, improve the inspection efficiency, and reduce the inspection cost. The vertical jack is slidably installed on the foundation steel plate, which can release the horizontal constraint and will not limit the horizontal movement of the pile foundation during the inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the utility model when testing the pile foundation;

[0019] Figure 2 It is a schematic diagram of the top view structure of the utility model when detecting the pile foundation.

[0020] Meaning of reference numerals in the figure:

[0021] 1-top steel plate; 2-pile foundation; 3-horizontal jack; 4-vertical jack; 5-sliding guide rail; 6-foundation steel plate; 7-reaction device; 8-displacement counting device; 9-reference rod. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with embodiments.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Example:

[0027] like Figure 1 and Figure 2 The pile foundation horizontal force corresponding displacement detection device of this embodiment is shown, which includes a top steel plate 1, a horizontal jack 3, a vertical jack 4, a foundation steel plate 6, a reaction force device 7, a displacement counting device 8, a reference rod 9 and a sliding guide rail 5.

[0028] The base steel plate 6 is fixed horizontally on the ground, and the top steel plate 1 has a certain thickness and is used to press on the top of the pile foundation 2 during the detection process to provide a vertical downward force for the pile foundation 2 to simulate the vertical load.

[0029] like Figure 2 As shown, this embodiment is provided with four vertical jacks 4, and two parallel sliding guide rails 5 are provided on the foundation steel plate 6. The two parallel sliding guide rails 5 are respectively located on both sides of the pile foundation 2. During detection, the four vertical jacks 4 are distributed at the four corners of the pile foundation 2, so that the forces of the four vertical jacks 4 can act on the pile foundation 2 more evenly. Two vertical jacks 4 are respectively slidably installed on each sliding guide rail 5, that is, the lower ends of the vertical jacks 4 are slidably connected to the foundation steel plate 6. The slidably installed vertical jacks 4 can release the horizontal constraints and will not restrict the horizontal movement of the pile foundation 2 during detection. The upper end of the vertical jack 4 is fixedly connected to the top steel plate 1, so that the force generated by the vertical jack 4 can act on the top steel plate 1.

[0030] The reaction device 7 of this embodiment is arranged on the side of the pile foundation 2, and the reaction device 7 includes a vertical column, and the column is fixedly inserted into the ground. The horizontal jack 3 is horizontally installed on the reaction device 7, and the horizontal jack 3 faces the pile foundation 2. During the detection, the force application end of the horizontal jack 3 presses against the side of the pile foundation 2, thereby acting on the side of the pile foundation 2.

[0031] The length direction of the sliding guide rail 5 is the same as the direction of the force exerted by the horizontal jack 3 on the pile foundation 2 , so that the direction of the force exerted by the horizontal jack 3 on the pile foundation 2 is the same as the sliding direction of the vertical jack 4 .

[0032] The reference rod 9 is fixedly mounted on the side of the pile foundation 2, and the reaction device 7 and the reference rod 9 are respectively located on opposite sides of the pile foundation 2. The displacement counting device 8 is mounted on the reference rod 9, and the detection end of the displacement counting device 8 detects the displacement of the top steel plate 1. The displacement counting device 8 can be a conventional device for detecting displacement, such as a displacement meter and a displacement sensor.

[0033] When the pile foundation horizontal force corresponding displacement detection device of this embodiment detects the pile foundation 2, its horizontal jack 3 generates a horizontal thrust acting on the side of the pile foundation 2, and the vertical jack 4 generates a downward force acting on the pile foundation 2 through the top steel plate 1. The displacement counting device 8 detects the horizontal displacement value corresponding to each level of horizontal force applied to the pile foundation 2.

[0034] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A pile foundation horizontal force corresponding displacement detection device, characterized in that: It includes a top steel plate, a horizontal jack, a vertical jack, a base steel plate, a reaction device and a displacement counting device. The base steel plate is horizontally fixed on the ground, the top steel plate is used to press on the top of the pile foundation, the lower end of the vertical jack is slidably connected to the base steel plate, the upper end of the vertical jack is fixedly connected to the top steel plate, the reaction device is arranged on the side of the pile foundation, the horizontal jack is horizontally installed on the reaction device, the horizontal jack acts on the side of the pile foundation during detection, the direction of the force exerted by the horizontal jack on the pile foundation is the same as the sliding direction of the vertical jack, and the displacement counting device is used to measure the displacement of the top steel plate.

2. The pile foundation horizontal force corresponding displacement detection device according to claim 1, characterized in that: The foundation steel plate is provided with a sliding guide rail, the length direction of the sliding guide rail is the same as the direction of the force exerted by the horizontal jack on the pile foundation, and the lower end of the vertical jack is slidably connected with the sliding guide rail.

3. The pile foundation horizontal force corresponding displacement detection device according to claim 2, characterized in that: Two parallel sliding guide rails are arranged on the foundation steel plate, and the two parallel sliding guide rails are respectively located on two sides of the pile foundation.

4. The pile foundation horizontal force corresponding displacement detection device according to claim 3, characterized in that: The pile foundation horizontal force corresponding displacement detection device is provided with four vertical jacks, two vertical jacks are slidably installed on each sliding guide rail, and the four vertical jacks are distributed at the four corners of the pile foundation.

5. The pile foundation horizontal force corresponding displacement detection device according to claim 1, characterized in that: The pile foundation horizontal force corresponding displacement detection device also includes a reference rod, which is fixedly installed on the side of the pile foundation, and the displacement counting device is installed on the reference rod.

6. The pile foundation horizontal force corresponding displacement detection device according to claim 5, characterized in that: The reaction force device and the reference rod are respectively located on two opposite sides of the pile foundation.

7. The pile foundation horizontal force corresponding displacement detection device according to claim 1, characterized in that: The reaction device comprises a vertical column which is fixedly inserted into the ground.

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