CN2595881Y

CN2595881Y - Combined high performance ramming shock reducing hammer

Info

Publication number: CN2595881Y
Application number: CN 02273102
Authority: CN
Inventors: 李彰明; 何思为; 杨良坤
Original assignee: Guangdong University of Technology
Current assignee: Guangdong University of Technology
Priority date: 2002-09-09
Filing date: 2002-09-09
Publication date: 2003-12-31
Anticipated expiration: 2012-09-09

Abstract

The utility model relates to a combined high-performance ramming vibration damping hammer. The utility model comprises a handle and a hammer body, wherein, the hammer body is provided with air holes, the center of the bottom surface of the hammer body is provided with an outwards convex column, and outwards convex columns, the outwards convex height of which is between the column arranged on the center of the bottom surface of the hammer body and the bottom surface of the hammer body, are uniformly distributed on the circumference of the column; the top surface of the hammer body is provided with nuts and threaded rods. The bottom surface of a ramming hammer of the utility model is manufactured into a shape that the bottom surface of the ramming hammer is in multi-section millisecond level delay contact with the reinforced ground, which causes that the different parts of the lower part of the ramming hammer act orderly on the ground according to proper delay time, under the condition that the total energy is not changed, the vibration is obviously reduced, the ramming air cushion effect of the dissipation energy is obviously reduced, and the ramming reinforcement effect is obviously increased. The utility model adjusts the weight of the hammer by fixed counter weight, which is simple and easy in implementation. The utility model can extend the application range of a dynamic force consolidation (heavy ramming) method and a dynamic force draining consolidation method which have the advantages of low cost, favorable effect and short construction period.

Description

Combined high-efficiency can be rammed the damping hammer

(1) technical field

The utility model relates to the foundation treatment technology field (as strong rammer, Dynamic Drainage Consolidation Method etc.) in the civil engineering, is meant that specifically a kind of combined high-efficiency can ram damping hammer.

(2) background technology

Present hammer ram, result of use are preferably the cylindrical or truncated cone-shaped of band pore, and its bottom surface is the plane mostly, under certain tamping energy, shakes bigger; A kind of strong hammer ram is also arranged, and its hammer ram bottom surface is the continuous curved surface of curvature, and hammer ram periphery symmetric arrangement pore reduces the tamping energy loss, it is said that vibrations also make moderate progress, but the degree of improving not enough, do not fit into the actual requirement of engineering under a lot of situations; Take place and communication theory from stress wave, thisly be the bottom surface of the continuous curved surface of curvature and do not meet damping the requirement of origination interval time of superposition shock wave.In addition, be used for the strong hammer ram that ground is handled, make shell and placing of concrete composition with steel or iron plate mostly, also have entirely to be made of steel or iron, they are once making, and weight is just fixing, make the adjustment of tamping energy to realize, can not heavily regulate by hammer by hanging height; And under some engineering geological conditionss, have only by hammering the size of heavily regulating tamping energy into shape and just have effect preferably.

(3) summary of the invention

The purpose of this utility model is exactly in order to solve above-mentioned the deficiencies in the prior art part, provides a kind of combined high-efficiency can ram the damping hammer.This hammer reduces the vibration influence to surrounding enviroment and building greatly having under the condition of identical tamping energy, improves effective tamping energy of soil mass consolidation simultaneously, and is convenient to governor weight weight and tamping energy, handles the needs of reinforcing to satisfy ground.

A kind of combined high-efficiency described in the utility model can be rammed the damping hammer, comprises that carrying handle and hammer body two parts connect to form, and has air-vent on hammer body, it is characterized in that, there is the outer convex cylindrical of many groups the hammer body bottom surface, is fixed with counterweight at the hammer body end face.

In order to implement the utility model better, can convex cylindrical outside be arranged in hammer body bottom surface central authorities, around this cylinder, also be evenly distributed with the outer convex cylindrical of evagination height between this cylinder and hammer body bottom surface; At the hammer body end face nut and screw rod being installed, can be that hammer body increases or reduce counterweight by nut and screw rod.

Principle of the present utility model is to utilize to hit ripple multistage Millisecond delay generation and reduce vibrations, and the principle that (reinforcing) action effect is strengthened, the hammer ram bottom surface is made into and reinforces ground and be the multistage Millisecond and postpone shape contact, as the cylindrical hammer bottom surface cylinder of evagination certain size (determining) and certain area (can be next definite) by different level by " whole hammer floor space/delays hop count " according to theory of stress wave.Flat hammer ram hits ripple and once takes place, and the bottom surface is the ripple that hits that the continuous curved surface of curvature hammer produces does not have enough interruption time delay, these all to vibrations reduce do not have tangible effect; And the hammer ram bottom surface is made into and reinforces the shape that ground multistage Millisecond delay contacts, then guaranteed to be necessary enough time delay so that vibrations obviously reduce the effect increase.The utility model utilizes simultaneously nut is set in the hammer body, and is by screw rod backspin fixed weight (steel or iron are made), heavy with governor weight, simple.

The utility model compared with prior art has following advantage and beneficial effect:

1. hammer ram of the present utility model bottom surface is made into and reinforces ground and be the multistage Millisecond and postpone the shape contact, make the different piece of hammer ram bottom successively by acting on the soil body appropriate time delay, under the constant situation of total energy, the stress wave amplitude that produces vibrations is behind certain delay time lag, by corresponding reducing with the functional relation of " the each contact area/hammer end gross area ", when this ratio obviously reduces, then stress wave amplitude is corresponding reduces significantly, thereby vibrations obviously reduce.According to soil mass property and postpone what different of hop count, the Particle Vibration Velocity of vibrations can descend 20～80%.

2. the utility model is removed outside the effect of air-vent ramming under the definite situation of total energy, because segmentation time impact pressurization, the cushioning effect of ramming of dissipation energy obviously reduces; In addition, the segmentation pressurization meets the pressurization consolidation theory with non-linear particularly adhesion properties soil body.These all can obviously improve rams consolidation effect.

3. the utility model utilizes nut is set in the hammer body, and is heavy with governor weight, simple by screw rod backspin fixed weight, the convenient use.

The utility model will make have that cost is low, effective, the dynamic consolidation of short advantage of duration (the strong rammer) and Dynamic Drainage Consolidation Method range of application expand greatly (because of the vibrations reason, these methods are very limited in application), produce huge economic benefit (said method, be generally other conventional method cost 80%～30%).According to incompletely statistics, only in Delta of the Pearl River area, Guangdong, by building size in recent years, will reduce investment outlay more than several hundred million yuans every year.

(4) description of drawings

Fig. 1 is a vertical view of the present utility model;

Fig. 2 is a structural representation of the present utility model.

(5) specific embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

As illustrated in fig. 1 and 2, combined high-efficiency can be rammed the damping hammer and be connected to form by carrying handle 7 and hammer body 8 two parts, on hammer body 8, have air-vent 5, there is an outer convex cylindrical 1 in hammer body bottom surface central authorities, also are evenly distributed with the outer convex cylindrical 2 of evagination height between this cylinder and hammer body 8 bottom surfaces around this cylinder; At hammer body 8 end faces nut 3 and screw rod 6 are installed, can increase or reduce counterweight 4 for hammer body.The area of hammer body 8 each outer convex cylindrical of bottom surface should equate as far as possible; Consider balance, counterweight 4 generally be no more than female hammer heavy 35%.

When using the utility model, hammer body 8 freely falling bodies are formed impact energy, outer convex cylindrical 1 forms for the first time impacts, and outer convex cylindrical 2 forms for the second time impacts, and hammer body 8 bottom surfaces form for the third time to be impacted.Theoretically,, can form enough delays repeatedly and impact, but in general engineering practice,, more reasonably be to form three times to impact because the hammer ram floor space is limited for enough big hammer body 8 floor spaces.As mentioned above, can realize the utility model preferably.

Claims

1. a combined high-efficiency can be rammed the damping hammer, comprises that carrying handle and hammer body two parts connect to form, and has air-vent on hammer body, it is characterized in that, there is the outer convex cylindrical of many groups the hammer body bottom surface, is fixed with counterweight at the hammer body end face.

2. a kind of combined high-efficiency according to claim 1 can be rammed the damping hammer, it is characterized in that convex cylindrical outside being arranged in hammer body bottom surface central authorities, also is evenly distributed with the outer convex cylindrical of evagination height between this cylinder and hammer body bottom surface around this cylinder.

3. a kind of combined high-efficiency according to claim 1 can be rammed the damping hammer, it is characterized in that, can nut and screw rod be installed at the hammer body end face.