CN204266188U - A kind of Built-up rammer reducing positice ground effect - Google Patents

Abstract

The utility model discloses a combined rammer for reducing the effect of air cushion, which belongs to the technical field of building construction dynamic ramming equipment; the technical problem to be solved is to provide a combined rammer with adjustable body weight and capable of reducing the effect of air cushion, so as to enhance the effect of foundation reinforcement, Moreover, it is not easy to suck the hammer, so one hammer can be used for multiple purposes; the technical solution adopted is: a bottom rammer body, multiple middle rammer bodies and a top rammer body are stacked sequentially from bottom to top and fastened by multiple connecting bolts The body of the cylindrical rammer is fixed, and the center of the top rammer body is provided with a lifting ring. Corresponding positions on the mating surface between the rammer bodies are provided with protrusions and grooves that cooperate with each other. hole; the utility model is mainly used for foundation treatment of building construction.

Description

A Combination Tamper with Reduced Air Cushion Effect

technical field

The utility model relates to a combined rammer for reducing the effect of an air cushion, which belongs to the technical field of dynamic ramming equipment for building construction, and in particular relates to a dynamic rammer for treating foundations.

Background technique

The dynamic compaction method is a method of freely dropping tens of tons (generally 8-40t) of a hammer from a height of tens of meters (generally 6-40m) to compact and strongly compact the foundation soil. In the construction process of foundation treatment by dynamic tamping method, most of the existing dynamic tamping hammers are made of cast steel. After the dynamic tamping hammer is decoupled from the dynamic tamping machine, the free fall of the dynamic tamping hammer will compress the air to form an air cushion, which is inevitable Consuming a part of ramming can affect the effect of ramming. If there is no vent hole or the area occupied by the vent hole is too small at the bottom of the dynamic tamper, the air will not be easily discharged. During the dynamic compaction process, the tamper will easily form a vacuum negative pressure suction hammer after contacting the soil (similar to the piston effect) ); At the same time, in order to discharge the gas, it will produce a high-decibel explosion sound to form noise pollution; due to the piston effect, the gas will also bring a large number of broken soil and gravel flying out of the exhaust hole during the discharge process, affecting Safety of equipment and construction personnel.

The technical deficiency of the existing dynamic tamper is: because there are only a few vent holes on the hammer body of some powerful tampers, and the proportion of the bottom area of the entire rammer is small, the free fall of the dynamic tamper compresses the air to do negative work, Affect the effect of dynamic compaction; if the air cannot be removed in time, a vacuum negative pressure will be formed. The bottom of the dynamic tamping hammer is flat, which is not conducive to the discharge of air. Compressed air forms an air cushion (air column) which has an obvious effect and affects the reinforcement effect of the dynamic tamping.

Utility model content

The utility model overcomes the deficiencies of the prior art, and the technical problem to be solved is to provide a combination tamper with an adjustable body weight and a reduced air cushion effect, which enhances the effect of foundation reinforcement and is not easy to suck the hammer, so that one hammer can be used for multiple purposes.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a combination tamper that reduces the effect of air cushion, including a top rammer body, a middle rammer body, a bottom rammer body and connecting bolts, a bottom rammer body , a plurality of intermediate rammer bodies and a top rammer body are stacked sequentially from bottom to top and fastened and fixed by a plurality of connecting bolts to form a cylindrical rammer body. A lifting ring is provided at the center of the top rammer body. Between the top rammer body and the middle rammer body, between the adjacent middle rammer bodies, between the middle rammer body and the bottom rammer body, corresponding positions are provided with mutually matching protrusions and recesses. Groove, the corresponding positions of the top rammer body, the middle rammer body and the bottom rammer body are all provided with exhaust through holes.

The connecting bolt is covered with a grounding ram and the grounding ram is located under the bottom ram. The grounding ram is a hemisphere, or a cuboid, or a cone.

Gaskets are also set on the connecting bolts between the ground rammer body and the bottom rammer body.

Exhaust passage grooves are all provided on the corresponding positions of the outer walls of the top rammer body, the middle rammer body and the bottom rammer body.

Compared with the prior art, the utility model has the beneficial effects that: the utility model adopts the multi-layer rammer bodies stacked and fixed by bolts, so that the weight of the rammer body can be adjusted by the number of the middle rammer bodies, Expand the scope of application and facilitate transportation; the bottom of the rammer body is equipped with a grounding rammer body through bolts, so that it first touches the ground when ramming, which not only increases the ramming depth, but also can be used interchangeably with various grounding rammers. With different functional requirements, one hammer can be used for multiple purposes; the protrusions and grooves between the tamper body make it a positioning function during installation, and can prevent shearing during use, preventing the relative displacement of the tamper body from shortening Service life; the design of the exhaust hole and the exhaust channel allows the air in the pit to be discharged in time during the tamping work, reducing the negative work effect of the air cushion on the reinforcement effect of the dynamic tamping, improving the efficiency of the dynamic tamping, and avoiding gravel Blocks and broken soil blocks fly out due to the vacuum negative pressure suction hammer, which increases the construction safety.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a three-dimensional structure schematic diagram of the present utility model.

Fig. 2 is a top view structural diagram of the utility model.

Fig. 3 is a sectional view along line A-A of Fig. 2 .

Fig. 4 is a schematic view of the structure of the utility model viewed from above.

Fig. 5 is a schematic diagram of the installation of the connecting bolt and the grounding rammer in the utility model.

In the figure: 1 is the top rammer body, 2 is the middle rammer body, 3 is the bottom rammer body, 4 is the connecting bolt, 5 is the lifting ring, 6 is the exhaust hole, 7 is the ground rammer body, 8 is the row Gas ventilation groove, 9 is gasket.

Detailed ways

As shown in Figures 1-5, the utility model is a combination rammer that reduces the effect of air cushion, including a top rammer body 1, an intermediate rammer body 2, a bottom rammer body 3 and connecting bolts 4, and a bottom rammer body 3 , a plurality of intermediate rammer bodies 2 and a top rammer body 1 are stacked sequentially from bottom to top and fastened and fixed by a plurality of connecting bolts 4 to form a cylindrical rammer body. Hanging ring 5, the corresponding position on the bonding surface between the top rammer body 1 and the middle rammer body 2, between adjacent middle rammer bodies 2, and between the middle rammer body 2 and the bottom rammer body 3 Both are provided with protrusions and grooves that cooperate with each other, and the corresponding positions of the top rammer body 1 , the middle rammer body 2 and the bottom rammer body 3 are all provided with exhaust through holes 6 .

The connecting bolt 4 is overlaid with a grounding ram 7, and the grounding ram 7 is located below the bottom ram. The grounding ram 7 is a hemisphere, or a cuboid, or a cone.

A washer 9 is also set on the connecting bolt 4 between the ground rammer body 7 and the bottom rammer body 3 .

Exhaust passage grooves 8 are all provided at corresponding positions on the outer walls of the top rammer body 1 , the middle rammer body 2 and the bottom rammer body 3 .

How to use:

1. Because it is combined, it is easy to transport and can be assembled at the construction site. The number of intermediate rammer bodies 2 to be installed can be selected according to different geological conditions and energy level requirements. The scope of application is expanded, flexible and changeable, economical and practical, and easy to operate ;

2. The grounding ram 7 at the bottom can be replaced according to different functional requirements. For example, if there are many residents near the site and the impact of vibration needs to be reduced, use a hemispherical grounding ram. When full ramming is required, it can be disassembled and replaced with a A cuboid grounded rammer with a matching bottom can be transformed into a flat-bottomed rammer;

3. The exhaust through hole 6 and the exhaust through groove 8 enable the utility model to discharge the air in the pit in time during the tamping work, reduce the negative work effect of the air cushion on the reinforcement effect of the dynamic tamping, improve the efficiency of the dynamic tamping, and avoid crushing Stones and broken soil blocks fly out due to the vacuum negative pressure suction hammer.

The above embodiments of the utility model have been described in detail in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned embodiments. Make various changes below.

Claims (4)

1. A combined rammer that reduces the effect of air cushions, including a top rammer body (1), a middle rammer body (2), a bottom rammer body (3) and connecting bolts (4), a bottom rammer body (3 ), a plurality of intermediate rammer bodies (2) and a top rammer body (1) are stacked sequentially from bottom to top and fastened and fixed by a plurality of connecting bolts (4) to form a cylindrical rammer body, which is characterized in that: the top layer A lifting ring (5) is provided at the center of the tamper body (1), between the top rammer body (1) and the middle rammer body (2), and between adjacent middle rammer bodies (2) , The corresponding positions on the bonding surface between the middle tamper body (2) and the bottom rammer body (3) are provided with protrusions and grooves that cooperate with each other, and the top rammer body (1), the middle rammer body The corresponding positions of the body (2) and the bottom rammer body (3) are provided with exhaust through holes (6). 2. A combination rammer for reducing the effect of air cushion according to claim 1, characterized in that: said connecting bolt (4) is overlaid with a grounding rammer (7) and the grounding rammer (7) is located on the bottom rammer Below the hammer body, the ground rammer (7) is a hemisphere, or a cuboid, or a cone. 3. A combination rammer that reduces the effect of air cushion according to claim 2, characterized in that: the connecting bolt (4) between the ground rammer body (7) and the bottom rammer body (3) is also Set comes with spacers (9). 4. A combination rammer that reduces the effect of air cushion according to claim 1 or 2, characterized in that: the top rammer body (1), the middle rammer body (2) and the bottom rammer body (3) Exhaust channels (8) are provided at corresponding positions on the outer wall of the exhaust.