CN216449492U - A rapid positioning device for excitation point and detection point by low-strain reflected wave method - Google Patents

Abstract

The utility model relates to the field of foundation engineering, and in particular provides a low-strain reflected wave method for rapidly locating an excitation point and a detection point, which comprises a disc and an outer frame. The inner supports located in the same plane, and the included angle between the adjacent inner supports is 120°, and the three inner supports are connected to the inside of the outer frame. Compared with the prior art, according to the size of the pile diameter, the utility model makes the disk in the device overlap the pile center by adjusting the lateral adjuster on the inner support, and the position of the ring is the position of the excitation point, which can be quickly found. The location of the excitation point. Because the positions of the excitation point and the detection point are relative, the position of the detection point can also be found quickly, thereby improving the accuracy of the pile foundation integrity detection.

Description

A rapid positioning device for excitation point and detection point by low-strain reflected wave method

technical field

The utility model relates to the field of foundation engineering, in particular to a device for quickly locating an excitation point and a detection point by a low-strain reflected wave method.

Background technique

In the process of testing the integrity of the expressway concrete cast-in-place pile, the condition of the top surface of the tested pile directly affects the quality of the test signal and the accuracy of the judgment of the integrity of the pile body. The quality and section size are basically the same as the design conditions of the pile body.

Clean up prior to testing to reveal a hard, fresh concrete surface. The hard and fresh concrete surface needs to be ground. Affected by the on-site testing environment, the position of the excitation point cannot be accurately positioned (the precise positioning of the excitation point is required to be 2/3 radius from the center of the pile).

In the actual detection process, the determination of the position of the excitation point and the magnitude of the excitation force of the hammer have a direct impact on the accuracy of the reflected wave collection, and also have a direct relationship with the detection speed.

SUMMARY OF THE INVENTION

The utility model aims at the shortcomings of the above-mentioned prior art, and provides a rapid positioning device for the excitation point and the detection point of the low-strain reflected wave method with reasonable design, simple structure and safe and fast use.

The technical scheme adopted by the utility model to solve its technical problems is:

A low-strain reflected wave method excitation point and detection point rapid positioning device, comprising a disc and an outer frame, the disc is located at the center position, and is connected with three equal-length inner supports located in the same plane, and the same The included angle between adjacent inner supports is 120°, and three of the inner supports are connected to the inside of the outer frame.

Further, each of the inner supports is provided with a lateral adjuster, and the lateral adjuster is provided with a universal moving pulley.

Further, the universal movable pulley is 3-5 cm away from the bottom surface of the inner support, and the universal movable pulley on each of the lateral adjusters is flush in height.

Further, each of the inner supports is provided with a scale line.

Further, the outer frame is in the shape of a triangle, and three corners of the triangular outer frame are respectively connected to the three inner supports.

Further, three inner corners in the triangular frame are respectively provided with stiffening sections, a fixing ring is arranged in the middle of the stiffening sections, and the inner support is hung in the fixing ring through hooks.

Further, circular rings are provided on the three corner points of the triangular outer frame and on the outer side of the stiffening section, and the circular rings are fixedly connected with the triangular outer frame.

Preferably, the straight line distance from the fixing ring to the center of the ring is 18-22 cm.

Preferably, the diameter of the ring is 10-15cm.

Compared with the prior art, the low-strain reflected wave excitation point and detection point rapid positioning device of the present invention has the following outstanding beneficial effects:

According to the diameter of the pile, the utility model adjusts the lateral adjuster on the inner support so that the disc in the device overlaps the pile core, and the position of the ring is the position of the excitation point, which can quickly find the position of the excitation point. Because the positions of the excitation point and the detection point are similar, the position of the detection point can also be found quickly, thereby improving the accuracy of the pile foundation integrity detection.

To sum up, the utility model has the advantages of reasonable design, simple structure, easy processing, small size, convenient and quick use, and the like.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Accompanying drawing 1 is a kind of low-strain reflected wave method excitation point and the structure schematic diagram of the detection point quick positioning device;

Accompanying drawing 2 is a schematic diagram of the middle and outer frame of a low-strain reflected wave method excitation point and detection point rapid positioning device;

Accompanying drawing 3 is a kind of low-strain reflected wave method vibration point and detection point quick positioning device in the inner support schematic diagram;

Accompanying drawing 4 is a kind of low-strain reflected wave method vibration point and detection point rapid positioning device in the lateral regulator structure schematic diagram;

FIG. 5 is a schematic diagram of a universal moving pulley in a device for rapidly locating vibration points and detection points by the low-strain reflected wave method.

The symbols in the attached drawings represent:

1. Pile head, 2. Ring, 3. Outer frame, 4. Stiffening section, 5. Inner support, 6. Disc, 7. Lateral adjuster, 8. Universal moving pulley, 9. Fixed ring.

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present utility model.

In the present utility model, unless otherwise stated, the directional words used such as "up, down, left and right" usually refer to the up, down, left and right as shown in the accompanying drawings; "inside, outside" ” means inside and outside relative to the contour of each component itself.

A preferred embodiment is given below:

As shown in Figures 1-5, a low-strain reflected wave method for rapid positioning of excitation points and detection points in this embodiment includes a wafer 6 and an outer frame 3. The wafer 6 is located at the center position and is welded with three The inner supports 5 of equal length are located in the same plane, and the included angle between adjacent inner supports 5 is 120°. Three inner supports 5 are connected to the inside of the outer frame 3 .

The outer frame 3 is triangular in shape, and the three inner corners of the triangular outer frame 3 are respectively provided with stiffening sections 4 .

Rings 2 are provided on the three corner points of the triangular outer frame 3 and on the outer side of the stiffening section 4 , and the ring 2 is welded with the triangular outer frame 3 .

In this embodiment, the straight line distance from the fixing ring 9 to the center of the ring 2 is 20 cm, and the diameter of the ring 2 is 12 cm.

Each of the inner supports 5 is provided with a lateral adjuster 7 , and a set of universal moving pulleys 8 are provided on the four sides of the lateral adjuster 7 . The universal movable pulley 8 is 3-5 cm away from the bottom surface of the inner support 5, and the universal movable pulley 8 on each of the lateral adjusters 7 is flush in height. Wherein, each inner support 5 is provided with a scale line.

When the low-strain reflected wave method excitation point and detection point rapid positioning device of the present invention is in use, the device precisely aligns the disc 6 with the pile head 1 pile core through the universal movable pulley 8, and adjusts the inner support according to the size of the pile diameter. Lateral adjusters 7 on 5 allow the length of the inner support 5 to be 2/3 of the radius from the center of the pile. A triangular outer frame 3 is added, and three inner corners of the triangular outer frame 3 are respectively provided with stiffening sections 4 to enhance the torsional resistance of the entire device.

The inner support 5 is stretched and adjusted by the lateral adjuster 7, which is suitable for the determination of the excitation point and the position of the detection point of the foundation piles with different diameters. The diameter of the ring 2 is selected to be 12cm, which meets the requirements of the current technical specifications for the detection of building pile foundations.

After the pile head 1 and the core of the pile coincide with the disc 6 of the device, the excitation points are the three points at the ring, and the excitation point and detection point can be found quickly and accurately by using this device.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the usual changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (9)

1. a low-strain reflected wave method excitation point and detection point rapid positioning device, it is characterized in that, comprise disc and outer frame, and described disc is located at the center position, and is connected with three equal lengths, is located in the same plane and the included angle between the adjacent inner supports is 120°, and the three inner supports are connected to the inside of the outer frame. 2. a kind of low-strain reflected wave method excitation point and detection point rapid positioning device according to claim 1, is characterized in that, each described inner support is provided with lateral adjuster, and described lateral adjuster is on With universal moving pulley. 3. a kind of low-strain reflected wave method excitation point and detection point rapid positioning device according to claim 2, is characterized in that, described universal movable pulley is 3-5cm from the bottom surface of inner support, each described lateral adjustment The swivel pulley on the unit is flush. 4 . The device for rapidly locating vibration points and detection points by a low-strain reflected wave method according to claim 3 , wherein each of the inner supports is provided with a scale line. 5 . 5. a kind of low-strain reflected wave method excitation point and detection point rapid positioning device according to claim 1, is characterized in that, described outer frame is triangular, and three corners of triangular outer frame are respectively connected with three described inner support. 6. The device for rapidly locating vibration points and detection points by a low-strain reflected wave method according to claim 5, wherein the three inner corners in the triangular frame are respectively provided with stiffening sections, and the stiffening sections are A fixing ring is arranged in the middle, and the inner support is hung in the fixing ring through a hook. 7 . The device for rapidly locating vibration points and detection points by low-strain reflected wave method according to claim 6 , wherein the three corner points of the triangular outer frame and the outside of the stiffening section are provided with 7 . There is a ring, and the ring is fixedly connected with the triangular outer frame. 8 . The device according to claim 7 , wherein the linear distance from the fixed ring to the center of the ring is 18-22 cm. 9 . 9 . The device for rapidly locating the excitation point and the detection point by the low-strain reflected wave method according to claim 8 , wherein the diameter of the ring is 10-15 cm. 10 .

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