Device for measuring compaction settlement of dynamic compaction replacement foundation

Abstract

The utility model relates to the technical field of compaction settlement measuring devices, and discloses a dynamic compaction replacement foundation compaction settlement measuring device which comprises a dynamic compaction machine, a hanging seat is installed at the position of a hanging rope of the dynamic compaction machine, a measuring assembly used for measuring the compaction settlement of a hanging lug is arranged on the front side of the dynamic compaction machine, and the measuring assembly comprises a driving box fixed to the front side of the dynamic compaction machine. The bottom face of the driving box is rotationally connected with a mounting base, and a laser range finder is arranged on the bottom face of the mounting base. The laser range finder is arranged on the front side of the dynamic compaction machine, the reflective sticker is arranged on the lifting seat, the protective ring is adopted for protection, the compaction settlement of the lifting lug at the position is measured through the rotation angle of the laser range finder and the distance between the laser range finder and the reflective sticker, and in the measuring mode, a measuring device does not need to be arranged on the lifting lug; and the protection ring can shield the reflective sticker when the lifting lug works, so that the reflective sticker is prevented from being contaminated with dust and soil to affect the distance measurement of the laser range finder, and the reliability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of settlement measurement devices, and in particular to a settlement measurement device for dynamic compaction replacement foundation. Background Technology

[0002] Dynamic compaction machines are an important type of compaction machinery in engineering. The working process involves repeatedly lifting a 10-60 ton hammer to a height of 6-30 meters and then letting it fall freely. The enormous potential energy generates a powerful impact force, forcefully compacting the soil. Dynamic compaction replacement is an improvement on dynamic compaction and is an economical and rapid method for foundation treatment. Specifically, the process involves backfilling crushed stone into the compaction pit. The impact energy of the falling hammer forces the granular aggregate (crushed stone, etc.) into the compressible soft soil. The immense impact energy then compacts the stones through the reinforced soil layer, causing them to sink and form piles. Through a process of "filling—several impacts—refilling," a composite foundation is ultimately formed, consisting of crushed stone piles, inter-pile soil, and a crushed stone cushion layer.

[0003] An existing device for measuring the settlement of a dynamic compaction replacement foundation (publication number: CN219572950U) has at least the following drawbacks: This device calculates the settlement by installing a laser level on the hammer and projecting a laser onto an external optical sensor plate. However, due to the large weight of the hammer, it generates enormous inertia after free fall and impact with the ground, causing the laser level to vibrate violently and potentially damage it. Furthermore, the hammer splashes up a large amount of dust upon impact, which falls into the laser level and obstructs the laser beam, affecting the measurement of the settlement and making the device unreliable. Therefore, this utility model is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for measuring the settlement of dynamic compaction replacement foundations.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for measuring the settlement of a dynamic compaction replacement foundation includes a dynamic compaction machine. A lifting seat is installed at the lifting cable of the dynamic compaction machine, and a lifting lug is clamped and fixed inside the lifting seat. A measuring component for measuring the settlement of the lifting lug is provided on the front side of the dynamic compaction machine. The measuring component includes a drive box fixed on the front side of the dynamic compaction machine. A mounting base is rotatably connected to the bottom surface of the drive box. A laser rangefinder is provided on the bottom surface of the mounting base. A reflective sticker is pasted on the outer wall of the lifting seat, and a protective ring is movably fitted on the outer wall of the lifting seat, covering the outer wall of the reflective sticker.

[0007] As a further embodiment of this utility model, a drive motor is installed inside the drive box. One end of the output shaft of the drive motor and the outer wall of the rotating shaft of the mounting base are both fixed with pulleys. The two pulleys are linked by a synchronous belt. A rotary encoder is installed at one end of the rotating shaft of the mounting base.

[0008] As a further embodiment of this utility model, the outer wall of the hanging base is rotatably connected to two cylinders, and one end of the cylinder extension rod is rotatably connected to the outer wall of the protective ring.

[0009] As a further embodiment of this utility model, a protective cover is fixed to one side of the drive box, the pulley is located inside the protective cover, and the rotary encoder is fixed to one side of the protective cover.

[0010] As a further embodiment of this invention, the laser rangefinder is detachably mounted to the mounting base via bolts and nuts.

[0011] As a further embodiment of this invention, a sealing strip is fixed to the inner wall of the protective ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By installing a laser rangefinder at the front of the dynamic compaction machine and placing reflective pads on the lifting base with a protective ring, after the first compaction, when the lifting base is lowered and connected to the lifting lug, the angle of the laser rangefinder is adjusted so that its laser beam is directed onto the reflective pad to determine the distance. Subsequently, after the lifting lug undergoes a second compaction, the angle of the laser rangefinder is adjusted again. At this time, a rotary encoder records the adjusted angle, and then the distance between the laser rangefinder and the reflective pad is measured a second time. The external central control equipment calculates the compaction amount of the second compaction using the law of cosines based on the feedback data. This measurement method does not require the installation of measuring devices on the lifting lug, effectively preventing the strong inertia of the lifting lug from causing vibration damage to the measuring devices. The protective ring can shield and protect the reflective pad when the lifting lug is working, effectively preventing dust and soil from adhering to the reflective pad and affecting the distance measurement of the laser rangefinder, thus increasing the reliability of the device. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a dynamic compaction replacement foundation settlement measuring device proposed in this utility model;

[0015] Figure 2 This is a three-dimensional disassembled structural diagram of a dynamic compaction replacement foundation settlement measuring device proposed in this utility model;

[0016] Figure 3 for Figure 2 A magnified schematic diagram of the partial three-dimensional structure of A in the middle;

[0017] Figure 4This is a three-dimensional structural diagram of the drive box of a dynamic compaction replacement foundation settlement measuring device proposed in this utility model.

[0018] In the diagram: 1. Dynamic compaction machine; 101. Lifting base; 102. Lifting lug; 2. Drive box; 201. Mounting base; 202. Laser rangefinder; 203. Reflective sticker; 204. Protective ring; 205. Drive motor; 206. Pulley; 207. Rotary encoder; 208. Cylinder; 3. Protective cover; 4. Sealing strip. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figures 1-4 As shown, a dynamic compaction replacement foundation settlement measurement device includes a dynamic compaction machine 1. A lifting seat 101 is installed at the lifting cable of the dynamic compaction machine 1. A lifting lug 102 is clamped and fixed inside the lifting seat 101. A measuring component for measuring the settlement of the lifting lug 102 is provided on the front side of the dynamic compaction machine 1. The measuring component includes a drive box 2 fixed on the front side of the dynamic compaction machine 1. A mounting base 201 is rotatably connected to the bottom surface of the drive box 2. A laser rangefinder 202 is provided on the bottom surface of the mounting base 201. A reflective sticker 203 is pasted on the outer wall of the lifting seat 101. A protective ring 204 is movably sleeved on the outer wall of the lifting seat 101, and the protective ring 204 covers the outer wall of the reflective sticker 203.

[0023] like Figures 2-4As shown, in this embodiment, a drive motor 205 is installed inside the drive box 2. One end of the output shaft of the drive motor 205 and the outer wall of the rotating shaft of the mounting base 201 are both fixed with pulleys 206. The two pulleys 206 are linked by a synchronous belt. A rotary encoder 207 is installed on one end of the rotating shaft of the mounting base 201. By activating the hydraulic clamp inside the lifting seat 101, the lifting lug 102 is released, causing it to fall rapidly and sink into the bottom surface. After the dust dissipates, the lifting seat 101 descends to the lifting lug 102 and connects. At this time, the drive protective ring 204 disengages, exposing the reflective sticker 203. The drive motor 205 then... Upon startup (05), pulleys 206 are fixed to both the output shaft of the drive motor 205 and the outer wall of the rotating shaft of the mounting base 201. These pulleys 206 are linked by a synchronous belt, allowing the drive motor 205 to rotate the mounting base 201 and the laser rangefinder 202. When the laser from the laser rangefinder 202 strikes the reflective sticker 203, the laser rangefinder 202 immediately sends a signal to the external central control device. The external central control device then stops the drive motor 205. At this time, the rotary encoder 207 records the rotational position of the mounting base 201, while the laser rangefinder 202 measures and records the distance between the measured position and the reflective sticker 203. The recording process begins, followed by the reset of the protective ring 204 to protect the reflective patch 203. Then, the lifting bracket 101 raises the lifting lug 102 for a second compaction. When the lifting bracket 101 descends to the lifting lug 102 and connects with the ceramic tile, the driving mounting base 201 and laser rangefinder 202 rotate clockwise. During this process, the rotary encoder 207 detects the rotation angle of the mounting base 201 and laser rangefinder 202. When the laser rangefinder 202 detects the distance to the reflective patch 203 again, the external central control equipment calculates the compaction amount for the second compaction using the cosine theorem based on the feedback data. The compaction amount for the third compaction is then calculated based on the laser rangefinder 202's position during the second compaction. The distance between the laser rangefinder 202 and the reflective sticker 203, the distance between the laser rangefinder 202 and the reflective sticker 203 during the third compaction, and the rotation angle of the laser rangefinder 202 during adjustment are calculated. The compaction amount for subsequent compactions is calculated in the same way. This measurement method does not require the installation of measuring devices on the lifting lug 102, effectively preventing the strong inertia of the lifting lug 102 from causing vibration damage to the measuring devices. The protective ring 204 can shield and protect the reflective sticker 203 when the lifting lug 102 is working, effectively preventing dust and soil from adhering to the reflective sticker 203 from affecting the distance measurement of the laser rangefinder 202, and increasing the reliability of the device.

[0024] like Figures 2-4 As shown, in this embodiment, two cylinders 208 are rotatably connected to the outer wall of the hanging base 101. One end of the telescopic rod of the cylinder 208 is rotatably connected to the outer wall of the protective ring 204. By setting the cylinder 208, the protective ring 204 can be driven to protect the reflective sticker 203 or detach from the reflective sticker 203.

[0025] like Figures 2-4As shown in this embodiment, a protective cover 3 is fixed on one side of the drive box 2, the pulley 206 is located inside the protective cover 3, and the rotary encoder 207 is fixed on one side of the protective cover 3. The protective cover 3 can protect the pulley 206 and the linkage belt.

[0026] like Figures 2-4 As shown, in this embodiment, the laser rangefinder 202 is detachably mounted to the mounting base 201 by bolts and nuts. This detachable mounting facilitates the disassembly of the laser rangefinder 202 for debugging or maintenance.

[0027] like Figures 2-4 As shown, in this embodiment, a sealing strip 4 is fixed to the inner wall of the protective ring 204, which can seal and protect the reflective sticker 203 through the sealing strip 4.

[0028] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: In use, when it is necessary to measure the compaction amount of the dynamic compaction machine 1, the dynamic compaction machine 1 is driven to the working point and the support column is unfolded. Then, the drive motor 205, rotary encoder 207 and cylinder 208 are connected to the external wall central control equipment by wired or wireless means. Then, the elevation angle and height of the telescopic beam of the dynamic compaction machine 1 are adjusted. Then, the hydraulic clamp inside the lifting seat 101 is activated to release the lifting lug 102. The lifting lug 102 falls quickly and smashes into the bottom surface. Then wait... After the dust settles, the lifting base 101 descends to the lifting lug 102 and connects. At this time, the starting cylinder 208 pulls the protective ring 204 out, exposing the reflective sticker 203. The drive motor 205 then starts. Since one end of the output shaft of the drive motor 205 and the outer wall of the rotating shaft of the mounting base 201 are both fixed with pulleys 206, and the two pulleys 206 are linked by a synchronous belt, the drive motor 205 can drive the mounting base 201 and the laser rangefinder 202 to rotate. When the laser from the laser rangefinder 202 shines on the reflective sticker 203, the laser rangefinder 202... The system immediately responds to the external central control device, which stops the drive motor 205. At this time, the rotary encoder 207 records the rotational position of the mounting base 201, while the laser rangefinder 202 measures and records the distance between the mounting base and the reflective sticker 203. Subsequently, the cylinder 208 drives the protective ring 204 to reset and protect the reflective sticker 203. Then, the lifting bracket 101 raises the lifting lug 102 for secondary compaction. When the lifting bracket 101 descends to the lifting lug 102 and connects with the ceramic plate, the drive mounting base 201 and the laser rangefinder 202 rotate clockwise. During this process, the rotary encoder... Device 207 detects the rotation angle between mounting base 201 and laser rangefinder 202. When laser rangefinder 202 detects the distance to reflector 203 again, the external central control device calculates the compaction amount for the second compaction based on the feedback data using the law of cosines. The compaction amount for the third compaction is then calculated based on the distance between laser rangefinder 202 and reflector 203 during the second compaction, the distance between laser rangefinder 202 and reflector 203 during the third compaction, and the rotation angle of laser rangefinder 202 during adjustment. The compaction amount for subsequent compactions is calculated in the same way.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A device for measuring the settlement of a dynamic compaction replacement foundation, comprising a dynamic compaction machine (1), characterized in that, The dynamic compaction machine (1) is equipped with a lifting seat (101) at the sling. The lifting lug (102) is clamped and fixed inside the lifting seat (101). A measuring component for measuring the compaction amount of the lifting lug (102) is provided on the front side of the dynamic compaction machine (1). The measuring component includes a drive box (2) fixed on the front side of the dynamic compaction machine (1). The bottom surface of the drive box (2) is rotatably connected to a mounting base (201). A laser rangefinder (202) is provided on the bottom surface of the mounting base (201). A reflective sticker (203) is pasted on the outer wall of the lifting seat (101). A protective ring (204) is movably sleeved on the outer wall of the lifting seat (101). The protective ring (204) covers the outer wall of the reflective sticker (203).

2. The device for measuring the settlement of a dynamic compaction replacement foundation according to claim 1, characterized in that, The drive box (2) is equipped with a drive motor (205). One end of the output shaft of the drive motor (205) and the outer wall of the rotating shaft of the mounting base (201) are both fixed with pulleys (206). The two pulleys (206) are linked by a synchronous belt. One end of the rotating shaft of the mounting base (201) is equipped with a rotary encoder (207).

3. The device for measuring the settlement of a dynamic compaction replacement foundation according to claim 2, characterized in that, Two cylinders (208) are rotatably connected to the outer wall of the hanging base (101), and one end of the telescopic rod of the cylinder (208) is rotatably connected to the outer wall of the protective ring (204).

4. The device for measuring the settlement of a dynamic compaction replacement foundation according to claim 3, characterized in that, A protective cover (3) is fixed on one side of the drive box (2), the pulley (206) is located inside the protective cover (3), and the rotary encoder (207) is fixed on one side of the protective cover (3).

5. The device for measuring the settlement of a dynamic compaction replacement foundation according to claim 4, characterized in that, The laser rangefinder (202) is detachably mounted to the mounting base (201) by bolts and nuts.

6. The device for measuring the settlement of a dynamic compaction replacement foundation according to claim 5, characterized in that, A sealing strip (4) is fixed to the inner wall of the protective ring (204).

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