SU1571137A1 - Device for tamping foundation pits - Google Patents

Abstract

The invention relates to the construction and can be used for the construction of strip foundations. The purpose of the invention is to reduce the labor intensity of stretching out ditches by ensuring tamping stability in operation. The device includes a boom base machine with a guide frame, on which horizontal tamper 4 is suspended by means of a gripping link. The tamper 4 is equipped with end knives 6 and 7, a longitudinal knife 8 and transverse blades. In the tamper 4 is made holes 11 for exhausting air from it and the slots, contributing to the reduction of shock oscillations of the soil during tamping. In the lower part of all the knives are made expanders to reduce the area of contact of the knives with the ground. In the knives 6 and 7 there are holes for attaching them to the tamper and holes 17 for exhausting air. The proposed device contributes to the limitation of the shock oscillations of the soil in the tamping zone, as well as preserving the direction of the longitudinal tamping axis, due to the fact that the gaps serve as conductors for guiding the vertical movement of the tamping. 5 hp ff, 9 ill.

Description

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The invention relates to the construction and can be used for the construction of strip foundations.

The purpose of the invention is to reduce the labor intensity of stretching out extended trenches by ensuring the stability of tamping at work.

FIG. 1 shows the device, a general view; in fig. 2 is a horizontal tamper with end longitudinal and transverse blades, a general view} in FIG. 3 is a section A-A in FIG. 2Ј in FIG. 4 - tamper with slots on its side surface and on the sole,

General view of figure 5 - tamper, longitudinal section; in FIG. 6 is a section BB in FIG. five; in fig. 7 - types of slit-type widening in the lower part of knives Ј in FIG. 8 - a section of a trench for tamping, plan view, in FIG. 9 is a section bb In Fig.8.

The device includes an excavator crane 1 with a guide frame 2 and an arrow 3, on which horizontal tamping 4 is suspended by means of a gripping link 5.

The tamper 4 is equipped with end knives 6 and 7, a longitudinal 8 and

CЈ 1

transversal knives 9 and 10. In tamper 4, holes 11 are made to exhaust air from it and slots 12 and 13. To reduce the area of contact between knives 6-10 and the ground in their lower part, one-sided 14 or double-sided 15 widers are made. In knives 6 and 7 holes 16, are made. for fastening with a tamper 4 and a hole 17 for exhausting air. The knives 6 and 7 are fixed on the tamper 4 by means of bolts 18.

In addition, the end knives 6 and 7 are made of variable width and height, which contributes to the optimization of trenching in different soils. End knives can have the shape of a square, rectangle or trapezium. Slots 12 and 13 on the tamper 4 help reduce the impact of soil vibrations during tamping. The device works as follows.

Before the beginning of compaction of the soil by tamping 4, end gaps are formed. To do this, one or both of the vertical knife is immersed in the ground to a depth of at least half the design mark of the trench. In this case, each end slot is perpendicular to the longitudinal axis of the trench. The formation of end slots makes it possible to separate the part of the trench undergoing tamping from its previously arranged sections and thereby reduce the effect of elastic waves after the impact of tamping. Then the tamping is immersed, as a result of which a trench 19 is formed with slots 20 in the ground 21, the rammer 4 is filled with concrete 22. The height of the end knives 6 and 7 changes before tamping, depending on the concrete level. When compacting the soil next to an eroded trench on its side, the elongated knife blocks the access of the ground and elastic waves to the finished trench when striking with a rammer.

During the horizontal tamping process, the knives are simultaneously buried below it in such a way that the knife facing the finished trench sinks more than the knife on the other side of the tamper. As a result,

Q with

Q

five

keep the tamping position horizontal.

Claims (6)

1. A device for breaking out foundation pits, comprising a guide rod on which a tamper is mounted with a carriage with a knife and a gripping link vertically attached to it, in order to reduce the labor intensity of stretching of excavated trenches by ensuring the stability of tamping at work, it is equipped with an additional vertical knife, and the tamper is made in the form of a horizontal beam with vertical ends, with each vertical knife fixed to the corresponding horizontal beam end. 2. The device according to claim 1, characterized in that the tamper is provided with transverse blades fixed on the side surface or on its sole. 3. The device according to claims 1 and 2, about t - characterized by the fact that the horizontal tamper is equipped with longitudinal knives mounted on its base. 4. The device according to p. Is distinguished by the fact that the horizontal tamper is equipped with additional longitudinal blades fixed on its lateral surface between the transversal blades. 5. The device according to claim 1, -o t l and is often so that slots are made on the sole and / or on the side surfaces of the tamper, 6. A device according to claim 4, characterized in that openings are provided in the transverse blades for air exhaust. // Fie.2 Fig4 one Sh BB8J0 pa "W" four Fig: 5 & P YU 1571137 B-6 P FIG. 6  Ohno YI2.7 four  n L + mr u Fi & 8 -ff Jl