Device for automatically measuring point compaction settlement of dynamic compaction machine

Abstract

The utility model provides an automatic measuring device for point compaction settlement of a dynamic compaction machine. The device comprises an acquisition triggering system and a recording system: a tension sensor is arranged on a connecting bolt for hanging a steel wire rope, and the tension sensor is connected with an automatic detacher to serve as the acquisition triggering system; magnet induction heads are installed on a steel wire rope fixed pulley of the dynamic compaction machine, the magnet induction heads are evenly installed around a wheel disc, and an electromagnetic induction switch is installed on a fixed pulley supporting plate to serve as a recording system. And finally, automatic data collection is achieved through a magnet induction head and tension sensor combined system, and the total ramming number, ramming settlement per ramming, the total ramming settlement and the ramming time of each ramming point in the dynamic compaction construction process can be automatically obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of dynamic compaction construction equipment, and in particular relates to an automatic measuring device for point compaction sinking of a dynamic compaction machine. Background Art

[0002] Dynamic compaction is a conventional foundation treatment technology. Due to its many advantages, including low cost, short construction period, simple process, and minimal post-construction environmental pollution, it is widely used for foundation treatment in backfill, collapsible loess, crushed stone, sandy soil, and other strata. During point-to-point compaction construction, the actual measurement of point-to-point tamping settlement is usually done manually, with one person holding a ruler and the other observing the instrument. This method is not only inefficient but also poses significant safety risks. In recent years, with the increasing depth of reinforcement, an increasing number of projects have employed high-energy dynamic compaction with energy levels exceeding 10,000 kN m in coastal and inland high-fill foundations. The maximum impact energy has now reached 25,000 kN m. Consequently, the height of the rammer has increased (exceeding 2 m), and the resulting ramming pit has also deepened (with the deepest pit exceeding 5 m).

[0003] The current traditional manual measurement method is time-consuming and labor-intensive, increases labor costs, and has high safety risks. Especially in high-impact projects, the characteristics of high tamping hammers and deep tamping pits make the above shortcomings particularly prominent, and even make it impossible to observe Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present invention provides an automatic measuring device for the point tamping sinking amount of a dynamic tamping machine in order to solve the above-mentioned problems in the prior art.

[0005] The main technical solution is: an automatic measuring device for the tamping sinkage of a dynamic compaction machine, comprising a boom and a fixed pulley arranged at the head of the boom, a steel wire rope arranged around the fixed pulley, and a collection trigger system and a recording system that communicate with each other.

[0006] The acquisition trigger system includes a connecting pin provided below the horizontal arm, the end of the steel wire rope is hung on the connecting pin, a tension sensor is provided on the connecting pin, and the tension sensor is connected to an automatic unhooking device on which the rammer is hung;

[0007] The recording system comprises magnetic induction probes evenly arranged along the circumference of the fixed pulley and an electromagnetic induction switch arranged beside the fixed pulley.

[0008] Furthermore, fixed pulleys are provided at the corners of the arm.

[0009] Furthermore, the connecting pin, the fixed pulley and the automatic unhooking device form the steel wire rope into a triangular shape under the gravity of the rammer.

[0010] The beneficial effects of the present invention are that it can improve the supervisor's control over the construction quality of the dynamic compaction machine, reduce errors in human calculations, reduce labor cost investment, improve work efficiency, improve operation accuracy, improve the construction quality of the project, and improve the construction technology level. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0012] Figure 1 This is a schematic diagram of the automatic measuring device for point tamping sinking of the utility model;

[0013] Among them: 1. Arm; 2. Fixed pulley; 3. Steel wire rope; 4. Connecting pin; 5. Rammer; 6. Automatic unhooker; 7. Magnetic induction probe; 8. Electromagnetic induction switch. DETAILED DESCRIPTION

[0014] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0015] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0016] An automatic measuring device for the tamping sinkage of a dynamic compaction machine comprises a boom 1 and a fixed pulley 2 arranged at the head of the boom 1, a steel wire rope 3 arranged around the fixed pulley 2, and a collection trigger system and a recording system communicating with each other.

[0017] The acquisition trigger system includes a connecting pin 4 provided below the horizontal arm 1, on which the end of the steel wire rope 3 is hung, and a tension sensor is provided on the connecting pin 4, which is connected to an automatic unhooking device 6 on which a rammer 5 is hung;

[0018] The recording system includes magnetic induction probes 7 evenly arranged along the circumference of the fixed pulley 2 and an electromagnetic induction switch 8 arranged beside the fixed pulley.

[0019] Fixed pulleys are provided at the corners of the arm 1.

[0020] The connecting pin 4 , the fixed pulley 2 and the automatic unhooking device 6 form the steel wire rope 3 into a triangle shape under the weight of the rammer 5 .

[0021] This proposal addresses the shortcomings of manual measurement of tamping point settlement by dynamic compaction by developing an automatic data collection device for dynamic compaction point settlement. This device comprises a data collection trigger system and a recording system. A tension sensor is mounted on the connecting pin 4 for the steel wire rope 3, connected to an automatic unhooker 6, serving as the data collection trigger system. A magnetic induction probe 7 is mounted on the fixed pulley 2 of the dynamic compaction machine's steel wire rope 3. Magnet induction probes 7 are evenly distributed around the fixed pulley 2, and an electromagnetic induction switch 8 is mounted on the support plate of the fixed pulley 2, serving as the recording system. Ultimately, the combined system of magnetic induction probes 8 and tension sensors enables automatic data collection, automatically obtaining the total number of strikes, the settlement per strike, the total settlement, and the strike time for each point during dynamic compaction.

[0022] The method for automatically collecting the data of the compaction settlement of the dynamic compaction machine is as follows:

[0023] a. Set the installation radius R of the magnetic sensor head and the number of installations K.

[0024] b. Place the rammer flat on the ground, and the automatic unhooker hooks the hammer and retracts the steel rope until it is tightened to a certain initial value set by the tension sensor to trigger the recording system. At this time, the electromagnetic induction times are calibrated as M0 = 0, and the time T0 is recorded.

[0025] c. Lift the rammer to the designed drop distance (calculated based on the tamping energy level and the rammer weight), automatically release the rammer when it reaches a fixed height, and record the number of tamping times N.

[0026] d. Release the steel rope, hook and hammer, retract the steel rope until it is taut, and record the number of electromagnetic induction times M. n and time T n .

[0027] e. Repeat cd at the same position to get the total tamping amount each time.

[0028] f. According to the above calculation, the distance between each two induction heads is L = 2ΠR / K, and the total tamping amount is H = 2ΠRM n / K.

[0029] g. The amount of tamping H per tamping n =2ΠR(M n -M n- 1) / K.

[0030] h. Average tamping amount of the last two times

[0031] The single tamping time is T n -T n-1 , the total ramming time is T n .

[0032] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An automatic measuring device for the tamping sinkage of a dynamic tamping machine, comprising a boom (1), a fixed pulley (2) arranged at the head of the boom (1), and a steel wire rope (3) arranged around the fixed pulley (2), characterized in that: It also includes an acquisition trigger system and a recording system that communicate with each other. The acquisition trigger system comprises a connecting pin (4) arranged below the transverse arm, the end of the steel wire rope (3) is hung on the connecting pin (4), a tension sensor is arranged on the connecting pin (4), and the tension sensor is connected to an automatic unhooking device (6) on which a rammer (5) is hung; The recording system comprises a magnetic induction probe (7) evenly arranged along the circumference of the fixed pulley and an electromagnetic induction switch (8) arranged beside the fixed pulley.

2. The automatic measuring device for point tamping sinking of a dynamic tamping machine according to claim 1, characterized in that: Fixed pulleys are provided at the corners of the arm (1).

3. The automatic measuring device for point tamping sinking of a dynamic tamping machine according to claim 1, characterized in that: The connecting pin (4), the fixed pulley (2) and the automatic unhooking device (6) form the steel wire rope (3) into a triangular shape under the gravity of the rammer (5).

Images