Device for measuring compaction settlement of dynamic compaction foundation

Abstract

The utility model provides a device for measuring the compaction settlement of a dynamic compaction foundation, which is characterized in that a measuring rope parallel to a lifting rammer is arranged on a suspension arm of a dynamic compaction machine, the front end of the measuring rope is connected with a measuring hammer, a tension sensor is arranged on the measuring rope, and a magnetic device is arranged on the lower surface of the measuring hammer and / or the upper surface of the rammer. The magnetic attraction device is used for magnetic attraction between the measuring hammer and the rammer. After the rammer falls to the ground, the measuring hammer falls to the upper surface of the rammer and is magnetically attracted with the rammer, then the winch is controlled to enable the measuring rope to lift the measuring hammer upwards, and when the tension sensor detects that the measuring rope reaches a set large tension value, the length of the released measuring rope at the moment is measured and recorded. The process is repeatedly executed, and the difference value between the rope length measured this time and the rope length measured last time is the ramming settlement of the rammer this time. According to the scheme, real-time monitoring of the tamping settlement amount of the dynamic compactor is effectively achieved, and the method has the advantages of being easy and convenient to operate, accurate in measurement and high in feasibility.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the strong ramming construction technical field, specifically relates to a kind of strong ramming ground rammer settlement measuring device. BACKGROUND

[0002] Dynamic Compaction Method, the method is just with strong rammer hoist heavy hammer (generally 5~40t) to corresponding height (generally 6~30m), then make heavy hammer free fall, ground soil appears intense shock wave and impact dynamic stress under the impact of heavy hammer, to reduce the compressibility of ground soil, improve the condition of sand liquefaction resistance, improve the strength of ground soil, in addition, it can also reduce the uneven degree of soil layer, reduce the possible uneven settlement.

[0003] Strong rammer is the machine that needs to be compacted in building engineering, often uses strong rammer to handle, and there are many types of strong rammers, such as frog type, vibration type, leap type, ramming type and heavy hammer hitting type, according to the engineering needs, so different types of strong rammers are used.

[0004] Rammer settlement is one of important construction parameters, and its detection means is relatively backward, during strong ramming construction on site, it is difficult to control ground rammer settlement due to the influence of site geological conditions and construction level, if rammer settlement does not reach design depth, then ground reinforcement effect cannot be guaranteed, traditional manual measurement method depends on the use of level gauge to complete leveling measurement, this method is low in efficiency, and there is certain safety risk in construction process. The process of relying on staff to record, analyze, count, arrange and archive rammer settlement of each hit on site is tedious and consumes manpower, and is low in efficiency and data analysis lag, so that construction quality cannot be effectively guaranteed, and there are limitations such as low efficiency, large deviation, high labor intensity and poor information management level. Manual measurement of rammer settlement has limitations such as high labor intensity, small data volume and poor precision. Therefore, a new method is needed to monitor rammer settlement in real time, so as to guarantee the construction effect of project.

[0005] Therefore, a strong rammer ground rammer settlement measuring device is needed to achieve safety, accuracy and convenience. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of strong rammer ground rammer settlement measuring device to solve the deficiency of prior art, the device can not only accurately measure the size of rammer settlement, but also can improve efficiency and guarantee the safety of staff.

[0007] The utility model is realized by the following technical solutions:

[0008] A kind of measurement device of ramming ground compaction quantity, measuring rope parallel to hoist rammer is installed on the boom of dynamic compactor, the front end of the measuring rope is connected with measuring hammer, tension sensor is installed on the measuring rope, for detecting the tension of measuring rope;Measuring rope is installed on winch, the amount of measuring rope is controlled by winch to control the lifting of measuring hammer;It also includes measuring rope length detection device, for real-time calculation of the length of measuring rope;

[0009] The lower surface of the measuring hammer and / or the upper surface of the rammer is equipped with a magnetic attraction device for magnetic attraction between the measuring hammer and the rammer.

[0010] In the above technical solution, the measuring rope is parallel to the rammer rope and passes through the roller at the top of the boom.

[0011] In the above technical solution, the measuring rope length detection device is a rotary encoder installed on the winch to calculate the length of the measuring rope.

[0012] In the above technical solution, the measuring rope length detection device is a rotary encoder installed on the roller at the front end of the boom of the dynamic compactor to calculate the length of the measuring rope.

[0013] In the above technical solution, the tension sensor, the measuring rope length detection device and the winch are connected to the central control system of the dynamic compactor through wired / wireless communication.

[0014] In the above technical solution, the central control system is in the cockpit of the dynamic compactor.

[0015] The advantages and beneficial effects of the present utility model are:

[0016] 1. The present utility model is different from the traditional manual measurement method, and this measurement method is safer.

[0017] 2. Since an impact wave is generated in the instant of ramming, some precise electronic devices such as laser may be affected by the impact wave, resulting in inaccurate measurement, while the present utility model is not affected by the impact wave.

[0018] 3. The present utility model uses a tension sensor to detect the tension on the measuring rope, when the measuring hammer is placed on the rammer and the measuring rope lifts the measuring hammer, the tension sensor reaches the set tension value, indicating that the measuring rope is in a tension state and the measuring hammer and the rammer are in close contact, at this time, the length of the measuring rope is measured, ensuring the accuracy and effectiveness of each measurement (i.e., each time the measurement is made, the measuring rope is in a tension state). In addition, since the weight of the measuring rammer is much smaller than the weight of the rammer, the attraction force between the measuring rammer and the rammer is also limited, so only a smaller size tension sensor is needed. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the structural schematic view of a ramming foundation settlement measuring device.

[0020] Figure 2 is a hammer bottom surface schematic view.

[0021] Figure 3 is a rammer upper surface schematic view.

[0022] For those of ordinary skill in the art, other related drawings can be obtained from the above drawings without creative labor. DETAILED DESCRIPTION

[0023] In order for those skilled in the art to better understand the technical scheme of the present application, the technical scheme of the present application will be further described below in combination with specific embodiments.

[0024] Referring to Figure 1 A ramming foundation settlement measuring device, a measuring rope 2 parallel to the hoisted rammer is installed on the jib 1-3 of the rammer, the measuring rope 2 is parallel to the rammer rope and passes through the front end roller 1-4 of the jib, the front end of the measuring rope 2 is connected with a measuring hammer 2-1, a tension sensor 3 is installed on the measuring rope 2 for detecting the tension of the measuring rope.

[0025] The tail of the measuring rope 2 is installed on a winch 6, the winch 6 controls the winding and unwinding amount of the measuring rope to control the lifting and falling of the measuring hammer. It should be noted that the winch 6 is only responsible for controlling the lifting and falling of the measuring hammer 2-1, and the lifting and falling of the rammer is controlled by another winch.

[0026] It also includes a measuring rope length detection device for real-time calculation of the winding and unwinding length of the measuring rope. In the embodiment, the measuring rope length detection device can be a rotary encoder arranged on the winch to calculate the winding and unwinding length of the measuring rope; or a rotary encoder arranged on the roller at the front end of the jib 1-3 of the rammer to calculate the winding and unwinding length of the measuring rope.

[0027] The lower surface of the measuring hammer and / or the upper surface of the rammer is provided with a magnetic attraction device for magnetic attraction between the measuring hammer and the rammer.

[0028] The tension sensor, the measuring rope length detection device and the winch are all connected with the central control system of the rammer through wired / wireless communication. The central control system is in the cockpit 1-5 of the rammer 1, controls the work of the winch 6 and collects the detection data of the tension sensor and the measuring rope length detection device.

[0029] Referring to the drawings Figure 2 and the drawings Figure 3The top of the rammer 1-1 is provided with an ear 1-1-1 for connecting a rammer rope; the lower surface of the measuring rammer 2-1 is provided with a lower magnetic absorbing sheet 4, and the upper surface of the rammer 1-1 is provided with an upper magnetic absorbing sheet 5; when the measuring rammer 2-1 is placed on the upper surface of the rammer 1-1, the measuring rammer 2-1 and the rammer 1-1 are magnetically attracted; or the magnetic absorbing sheet can be arranged only on the lower surface of the measuring rammer 2-1 or the upper surface of the rammer 1-1; since the measuring rammer and the rammer are made of iron, the magnetic attraction can be achieved.

[0030] Further, the weight of the measuring rammer is much greater than the weight of the rammer.

[0031] The working method of the strong foundation rammer settlement measuring device is as follows:

[0032] After the rammer is rammed to the ground, the winch 6 is controlled to make the measuring hammer fall to the upper surface of the rammer and be magnetically attracted, and then the winch 6 is controlled to pull the measuring hammer upward along the measuring rope; when the tension sensor detects that a set large tension value is reached on the measuring rope (at this time, it indicates that the measuring rope is in a tension state, and the measuring hammer and the rammer are in close contact), the central control system measures the length of the measuring rope at this time through the measuring rope length detection device and records it. It should be noted that during the process of pulling the measuring hammer upward along the measuring rope by the winch 6, the tension sensor on the measuring rope will detect a large tension value due to the magnetic attraction between the measuring hammer and the rammer, and then as the winch 6 continues to lift, the measuring hammer will overcome the magnetic attraction and be separated from the rammer, at which time the tension sensor will instantaneously decrease, and then the measuring hammer will be lifted upward and reset.

[0033] The above process is repeated, and the difference between the length of the measuring rope in this measurement and the length of the measuring rope in the last measurement is the settlement of the rammer in this measurement.

[0034] The above has exemplarily described the utility model, and it should be noted that any simple transformation, modification or equivalent replacement without creative labor of a person skilled in the art without departing from the core of the utility model falls within the protection scope of the utility model.

Claims

1. A device for measuring the ramming amount of a dynamic compaction ground foundation, characterized in that: The measuring rope is installed on the lifting arm of the dynamic compactor, and is parallel to the lifting rope of the rammer, and the front end of the measuring rope is connected with a measuring weight, and a tension sensor is installed on the measuring rope to detect the tension of the measuring rope; the measuring rope is installed on the winch, and the lifting of the measuring weight is controlled by the winch through controlling the winding and unwinding amount of the measuring rope; the measuring rope length detection device is used to calculate the winding and unwinding length of the measuring rope in real time; the lower surface of the measuring weight and / or the upper surface of the rammer is provided with a magnetic attraction device to realize the magnetic attraction between the measuring weight and the rammer.

2. The device for measuring the rammer sinkage of a dynamic compaction ground foundation according to claim 1, wherein: The measuring rope is parallel to the rammer rope and passes through the roller at the top end of the lifting arm.

3. The device for measuring the rammer sinkage of a dynamic compaction ground foundation according to claim 1, wherein: The measuring rope length detection device is a rotary encoder arranged on the winch.

4. The device for measuring the rammer sinkage of a dynamic compaction ground according to claim 2, wherein: The measuring rope length detection device is a rotary encoder arranged on the roller at the top end of the lifting arm of the dynamic compactor.

5. The device for measuring the ram-sink amount of a ground improved by dynamic compaction according to claim 1, wherein: The tension sensor, the measuring rope length detection device and the winch are connected with the central control system of the dynamic compactor through wired / wireless communication.

6. The device for measuring the rammer foundation compaction quantity according to claim 5, characterized in that: The central control system is arranged in the cab of the dynamic compactor.

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