SU1469027A1 - Method of working a pit - Google Patents

Abstract

The invention relates to the construction. The goal is to reduce the labor intensity of the work. In the production of zero-cycle work at the construction site, the contour of the pit for the building foundation and structure is outlined. Distributed wells (c) with walls inclined outwardly extend along the contour. In this case, C is carried out by ramming at a distance from one another, equal to the sum of the width C and the double thickness of the compacted soil formed. .The enclosing soil is removed to the line of the lower contour of the excavation that passes through the centers C. The sealing soil is removed with the formation of a slope with an angle equal to the angle of inclination of the walls C. 3 Il.

Description

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The invention relates to the construction, in particular to methods for developing pits for structures and excavations in the ground.

The aim of the invention is to reduce the labor intensity of the work.

Figure 1 shows a fragment of the pit, view in plan; figure 2 - pit excavation; Fig. 3 is a section along the slope-forming wells.

The method involves penetration through the upper contour 1 of the excavation pit dispersed with centers 2 wells 3 with walls inclined outwards when a compacted soil is formed around their zone. The wells 3 are located at a distance L equal to the sum of the width d of the well 3 and twice the thickness a of the compacted soil. Removing the soil is developed to the line of the lower contour of the pit passing through the centers of the wells 3. The excavation of the compacted soil is carried out with the formation of a slope with an angle equal to the angle of inclination of the walls of the wells 3. The method is carried out as follows.

In the production of zero-cycle works, the contour 1 of the pit for the building foundation and structure is outlined at the construction site. On the contour line 1, the center 2 of the first well 3 is marked. A ramming projectile is immersed from the ground surface to the design depth of the pit or to the full height of the tamper if the design depth of the pit is greater than that.

After diving, yes it is - -. are drawn from the ground, resulting in a well 3, around which

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formed a zone of compacted soil size a. The width of this zone varies depending on the type of soil,

The next point 2 is marked through the distance L - the center of the next well 3. The distance L is chosen not less than the transverse size of the compacting projectile d, but not more than the sum of the transverse size and twice the size of the compacted soil zone.

At the planned point 2, the well 3 is again sampled and the center of the next well is marked through the distance L. This is continued throughout the contour 1 of the pit. Then, with the help of earthmoving machines, the soil is excavated from the volume enclosed between the wells until the walls of the wells that are exposed to the outside of the excavation are exposed. At the same time, the slope of the excavation, consisting of halves of wells, has dense rammed walls with an inclination angle equal to the inclination of the forming tamping projectile. When using a round-cross section projectile, for example, a conical rammer, the strength of the wall of the excavation increases due to the formation of arched zones of the rotating soil.

In the presence of sandy or watery ground in the process of drilling out wells 3, fixing materials can be added.

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If the design depth of the pit is greater than the height of the tamper, then at the bottom of the open pit the distance from its wall is not less than transverse, the size of the wells mark the contour of the second pit, at which points 2 are marked — the centers of the wells 3 are at a distance from each other. A series of wells are punched again and excavated, all of the above operations are repeated, and a deeper excavation with dense, rammed walls is obtained. So continue until the design depth of the pit is reached.

Claims (1)

Invention Formula The method of excavation, which includes drilling along the contour of dispersed wells with walls inclined to the outside during the formation of compacted soil around their zone and removing the enclosing soil, which in order to reduce the workload, the wells are plowed out at a distance of one from another, equal to the sum of the width of the well and twice the thickness of the compacted soil; in this case, the soil is removed to the line of the lower contour of the excavation that passes through the centers of the wells; ground: with the formation of a slope with an angle equal to the angle of inclination of the walls of the wells. // // //// // //// // //// // 7 / ///// FIG. 3 1 zalekaepsh soil FIG. Z Do raft yen b (th soil