A high strain detection device

Abstract

The utility model belongs to the field of pile foundation detection, and relates to a high strain detection device, which comprises: a top plate, a counterweight, at least three hydraulic leveling devices, a connecting pipeline and a level, the top plate is arranged on the top of a pile body to be measured; the counterweight is fixed on the top plate, and the top plate and the counterweight jointly form a hammer body; the at least three hydraulic leveling devices are evenly arranged between the top of the pile and the top plate; the connecting pipeline connects the hydraulic leveling devices in series to a pressurizing device; and the level is installed on the top plate to calibrate the level. The utility model does not need a guide frame, thereby reducing the cost and installation difficulty. The counterweight and the hydraulic leveling device ensure the stability and centricity of hammering.

Description

Technical Field

[0001] This utility model belongs to the field of pile foundation testing, and in particular, it is a high-strain dynamic pile testing device for improving testing efficiency and accuracy. Background Technology

[0002] High-strain dynamic pile testing is a common method for evaluating the bearing capacity and integrity of pile foundations. Traditional methods rely on guide frames to ensure that the hammer strikes the top of the pile vertically. However, the installation of guide frames is cumbersome and costly, and uneven pile tops can easily lead to eccentric hammering, affecting the accuracy of the data. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a high-strain detection device that replaces the guide frame with a counterweight and combines a hydraulic leveling device to solve the problem of uneven pile tops, thereby achieving efficient and accurate testing.

[0004] The technical solution adopted by this utility model to solve the technical problem is:

[0005] This utility model provides a high-strain dynamic pile testing device, comprising: a top plate, a counterweight, at least three hydraulic leveling devices, connecting pipelines, and a level. The top plate is located on the top of the pile to be tested; the counterweight is fixed on the top plate, and the top plate and the counterweight together constitute an impact hammer; at least three hydraulic leveling devices are evenly distributed between the pile top and the top plate; the connecting pipelines connect the hydraulic leveling devices in series to a pressurizing device; and a level is installed on the top plate to calibrate the level.

[0006] Furthermore, the counterweight has perforations, and the top plate has protrusions through which the counterweight passes and is fixed by bolts.

[0007] Furthermore, the protrusion has elongated holes for installing bolts.

[0008] Furthermore, it also includes a lifting handle, mounted on the top surface of the top plate.

[0009] Furthermore, the hydraulic leveling device is a hydraulic jack, and each hydraulic jack is equipped with an anti-slip pad at its bottom.

[0010] Furthermore, the connecting pipelines are arranged in a ring, and the oil inlet and return port of each hydraulic leveling device are connected in series with the adjacent device through a three-way valve.

[0011] The advantages and positive effects of this utility model are:

[0012] 1. This utility model eliminates the need for a guide frame, reducing costs and installation difficulty.

[0013] 2. The counterweight and hydraulic leveling device of this utility model ensure the stability and centering of the hammer impact.

[0014] 3. This utility model is applicable to pile tops with different flatness, improving testing efficiency and data reliability. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the device according to an embodiment of the present utility model;

[0016] Figure 2 This is a top view schematic diagram of the device according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the top plate according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the counterweight block in an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the hydraulic leveling device according to an embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0021] like Figure 1-5 As shown, a high-strain dynamic pile testing device includes: a top plate 2, a counterweight 3, at least three hydraulic leveling devices 7, connecting pipes 8, and a level 6. The top plate 2 is located on top of the pile 1 to be tested; the counterweight 3 is fixed on the top plate, and the top plate 2 and the counterweight 3 together constitute an impact hammer; the three hydraulic leveling devices 7 are evenly distributed between the pile top and the top plate; the connecting pipes 8 connect the hydraulic leveling devices in series to a pressurizing device; the level 6 is installed on the top plate to calibrate the level.

[0022] The counterweight 3 has a through hole 301, and the top plate 2 has a protrusion 201. The counterweight 3 passes through the protrusion and is fixed by bolts 4.

[0023] The protrusion 201 has an elongated hole 202 for mounting bolts 4. The protrusion 201 is located on both sides of the top plate and has a clearance fit with the through hole of the counterweight (clearance on one side ≤2mm). Bolts 4 are M30 high-strength bolts (grade 8.8) with spring washers for anti-loosening. The bolt hole is an elongated hole (50mm in length and 32mm in width), allowing for slight lateral adjustment of the counterweight by ±20mm.

[0024] The lifting handle 5 is installed on the top surface of the top plate 2. After adjustment, the lifting handle 5 is lifted to the test height by a crane and a release hook, and then released to drive the pile 1, thereby achieving the purpose of high strain testing.

[0025] The hydraulic leveling device 7 is a hydraulic jack, and each hydraulic jack has an anti-slip pad at the bottom.

[0026] The connecting pipeline 8 is arranged in a ring, and the oil inlet and outlet of each hydraulic leveling device 7 are connected in series with the adjacent device through a three-way valve. Before testing, the hydraulic leveling device is placed on top of the pile, and then the hammer is placed on the upper part of the hydraulic leveling device. The leveling device is pressurized by the oil pump until the hammer is level and centered, and then the oil filling valve is locked.

[0027] This invention provides a solution for high-strain testing. This solution achieves guidance through counterweight without the need for a guide frame, which can prevent the hammer from tipping over due to instability during drop and avoid uneven hammering caused by uneven pile tops, thereby improving testing efficiency.

[0028] Pile body 1 is suitable for precast concrete piles, cast-in-place piles, or steel piles with a diameter ≥ 400 mm. Top plate 2 is made of Q355B steel plate with a thickness ≥ 50 mm. Wooden boards or rubber pads can be installed at the bottom of the top plate to buffer the hammer impact force.

[0029] Operating steps:

[0030] Install the leveling device: Distribute the hydraulic leveling device 7 evenly on the top of the pile and connect it in series with the pressurization equipment through the connecting pipe 8.

[0031] Leveling the top plate: Place the top plate 2 on the leveling device, apply pressure to adjust the height of each hydraulic device, and use the level 6 to ensure that the top plate is level.

[0032] Fixed counterweight: Pass the counterweight block 3 through the protrusion 201 of the top plate and tighten it with bolts 4.

[0033] Hammering test: Lift the top plate and counterweight to the set height using handle 5 and then release them to impact the top plate to complete the test.

[0034] Through the above implementation methods, this device can improve on-site operation efficiency by more than 40% while ensuring detection accuracy. It is especially suitable for complex working conditions such as deep foundation pits and narrow sites, filling the technical gap in intelligent leveling of high strain testing equipment.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A high strain detection device, characterized in that, include: Top plate (2) is set on top of the pile body (1) to be tested; The counterweight (3) is fixed to the top plate, and the top plate (2) and the counterweight (3) together constitute the impact hammer body; At least three hydraulic leveling devices (7) are evenly distributed between the pile top and the top plate; Connect the hydraulic leveling device in series with the pressurizing equipment via the connecting pipe (8); A level (6) is installed on the top plate to calibrate the level.

2. The apparatus according to claim 1, characterized in that, The counterweight (3) has a perforation (301), and the top plate (2) has a protrusion (201). The counterweight (3) passes through the protrusion and is fixed by bolts (4).

3. The apparatus according to claim 1, characterized in that, The protrusion (201) has an elongated hole (202) for installing bolts (4).

4. The apparatus according to claim 1, characterized in that, It also includes a lifting handle (5) mounted on the top surface of the top plate (2).

5. The apparatus according to claim 1, characterized in that, The hydraulic leveling device (7) is a hydraulic jack, and each hydraulic jack has an anti-slip pad at the bottom.

6. The apparatus according to claim 1, characterized in that, The connecting pipeline (8) is arranged in a ring, and the oil inlet and return port of each hydraulic leveling device (7) are connected in series with the adjacent device through a three-way valve.

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