SU1726646A1 - Device for soil compaction - Google Patents

Abstract

Use: devices for soil compaction. SUBSTANCE: device contains spring-loaded latches mounted in the upper part of the body with stoppers. The impact rods have plates on the outer surface with slots for accommodating the detent locks and removable impact elements in the form of ribs mounted in the lower part. 5 il.

Description

The invention relates to construction and is intended for the construction of foundations in rammed trenches and punched wells, as well as for modifying soils.

A known tamper for soil compaction, comprising a housing with concentrically arranged, with the possibility of their vertical movement, sections with a lock for each of them, a rod with a loop for lifting.

The disadvantages of this tamper are low compaction efficiency and high energy consumption.

Closest to the present invention is a working body for soil compaction, including a gripping device, a body with guide channels in which percussion cylindrical rods with heads, whose working ends protrude beyond the limits of the body, are placed with the possibility of vertical movement.

The disadvantage of the working body is low efficiency and high energy costs.

The purpose of the invention is to increase the efficiency of compaction and reduce energy consumption.

Figure 1 shows schematically the proposed soil compaction device; figure 2 - node I in figure 1; on fig.Z - section aa in figure 2; in figure 4. - node II in figure 1; figure 5 - section bb in figure 4.

The tool body 13 includes a gripping device 1, a housing — a tamper 3 with guide cheeks 2 and guide channels 4. The guide channels 4 are parallel with each other with the possibility of vertical movement of impact rods 5 with abutting rails 6 for individually fixing them on to the working height of the latches 7. The latches 7 are made spring-loaded with stop stoppers, while the plates with slots for accommodating the stoppers of the latches 7 are located: on the upper side

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the outer surface of the impact rods 5. The proposed design of the latches 7 excludes their unauthorized opening, while in order to eliminate the backlash of the retainer of the retainer 7, a seal is put on its end in the slot of the rail 6, for example, from cord rubber (Fig. 2). The tool body 13 also includes removable impact elements in the form of ribs 8, which are attached to the lower ends of the impact rods 5 by means of bolted connections 9 (FIG. 3). The operating member 13 is connected to the lifting mechanism 10 through the boom 11 and the guide frame 12, which is inserted into the grooves of the guide cheeks 2 of the tamper body 3 (Fig. 4).

A device for soil compaction operates as follows.

The initial position of the working body 13 is when the working height of the impact rods is 5 Nrab. 0, i.e. the shock rods 5 are retracted into the housing-rammer 3 lying on the ground 14 (FIG. 4).

When the latches 7 are opened, the rammer body 3 is raised to a height equal to the working height of the impact rods 5 - Hzb.st., the latches 7 are closed, thereby firmly fastening the impact rods 5 in the rammer 3 (Figures 1 and 2). The working body 13 is raised to the design height and dumped the required number of times. The compaction cycle is considered complete when the working body 13 is buried into the soil mass 14 to a depth of

Nupl-Nrab.st- Nrab.tr.

where nupl. compaction depth, m;

Nrab.st. - working height of impact rods, m;

Nrab.tr. - working height of the tamping body, m.

Local compacted zones of soil form around the punched wells. In this way, foundations are carried out in punched wells, (FIG. 5).

If it is necessary to obtain a solid compacted soil zone, the working body 13 is lifted again, filled with a hard material formed in the soil and compacted by dumping the working body 13 with extended rods 5. These operations repeat the calculated number of times until the compacted rigid material reaches punched wells.

Then, the latches 7 are opened, the rammer body 3 is lowered onto the surface of the ground 14 (Screed 0) and the latches 7 are closed again.

Raise the working body 13 and fill the rammed cavity with hard material and dump the working body 13. After one or several drops of the working body 13, fill the rammed hard material cavity until it reaches the level of the soil surface 14 or the calculated level. As a result, a compacted zone of soil, reinforced with rigid material, is formed.

The proposed soil compaction device is highly versatile and can be used in soil modification and the erection of various foundation structures, for example, in compacted pits, slotted, cross-shaped, anchor, intermittent, etc.

With impact rods 5 that do not extend beyond the lower face of the rammer body 3, the operating member 13 can be used for surface compaction of soil or for ramming pits for shallow foundations.

Due to the extension of the working rods 5 to different heights, it is possible to make foundations of various designs and purposes: a greater extension of the central impact rods 5. - to concentrate the transfer of external vertical load along the axis of the foundation to the deeper soil layers of the base; a larger extension of the impact rods 5 located along the perimeter of the tamping body 3, in order to develop a compacted soil zone over the foundation area; extending the impact rods 5 to different heights relative to each other — for sensing moment loads; use of the working body 13 complete with removable elements in the form of ribs 8.

The proposed device makes it possible to increase the efficiency of the soil compaction process and at the same time to reduce the energy consumption due to an increase in the specific pressure due to a decrease in the impact area from flat to total bar or ribbed.

The most effective use of the device for soil compaction on construction sites with soils that are heterogeneous in physical and mechanical characteristics and location in the plan and in depth, due to the rapid re-adjustment of the device from a flat tamper to an elongated rod or ribbed with adjustable working height.

Claims (1)

Invention Formula A device for compacting soils containing a gripping device, a tamper in the form of a housing with through guide channels, in which they are placed with the possibility of vertical displacement impact rods, whose axes are parallel, characterized in that, in order to increase compaction efficiency and reduce energy consumption, it is provided with spring-loaded retainers mounted in the upper part of the body with stoppers, and the shock rods have plates on the outer surface with slots for accommodating the stoppers of the latches and removable impact elements in the form of ribs mounted in the lower part. f) j ipue.i fi jff FIG. 2