SU878862A1 - Device for consolidating the slope of a pit in rocky and semi-rocky soils - Google Patents

Description

one

The invention relates to the field of construction and can be used in the construction of roads and railways in difficult geotechnical conditions.

A device is known for fastening a slope of a pit, including pile-joined joint piles and an enclosing wall inclined towards backfill, supported by a base at the level of the bottom of the pit through a series of support blocks in the pile and connected at the top with a pile grillage 1.

The drawbacks of such a device are the need to perform a large amount of earthwork beyond its own, an increase in the right of way, and the need to install temporary anchorage of the excavation pit in front of the fencing wall to eliminate the danger of breaking or shearing the soil during production. In addition, such a device does not contain drainage elements for removal of groundwater from the enclosing wall, which can lead to an increase in pressure on it and its destruction due to hydrostatic and hydrodynamic pressure that occurs when the level of groundwater rises.

Closest to the invention is a device for securing a slope of a pit in non-rocky and semi-rocky soils, including piles connected by a grillage, a boundary wall and drainage elements located behind the enclosing wall 5 and the pile 2.

The disadvantages of this device are a large amount of additional earthworks, due to the need for trench fragments behind it for the installation of drainage elements, the need to install a temporary anchorage of the excavation for the installation of drainage elements in connection with the possibility of shearing and breaking ground

15 is a big laboriousness of manufacturing, as well as the need to violate the natural state of the soil located behind them. The aim of the invention is to reduce

20 of the volume of earthworks, increasing reliability by eliminating the need for disturbing the natural state of the soil located beyond its own and ensuring the safety of work.

25 The goal is achieved by the fact that in the device for fastening a slope of a pit in non-rocky and semi-rocky soils, including piles connected by a grillage, a fencing wall and drainage elements,

30 draining elements are placed menada

the enclosing wall and the EVs facing it, and the enclosing wall is made with through channels in the lower part communicating with the draining elements, the draining elements can be made in the form of panels of non-woven synthetic material.

FIG. 1 shows a device for fastening a slope of a pit, side view; in fig. 2 shows section A-A in FIG. one.

The device contains one or several rows of piles 1 embedded in soils 2 located below the bottom of the excavation and united at the top of the excavation by a grillage 3, draining elements 4 located between the first row of piles and the fencing wall 5 attached to the first row of piles by means of, for example, reinforcing corrosion-proof outlets 6, associated with the reinforcement cage of the first row of piles 1, and having through channels 7 in the lower part communicating with drainage elements 4. Drainage of groundwater entering the drainage element ntam 4, flow through channels 7 through the partition wall 5, e.g., in the tray 8 on the side of the carriageway of the road 9 arranged at the bottom of the pit.

As drainage elements 4, any material with a high filtration coefficient can be used, for example, non-woven synthetic material, and the fencing wall 5 can be made of a collection of individual plates installed and attached to reinforcement releases 6 from the first row of piles as the excavation which practically ensures complete safety of work.

The method of constructing the described device in the case of using a partition wall 5 of prefabricated elements consists in arranging one or several rows of bored piles 1 at the border of the excavation, combining the pile tips with a grillage 3, developing under the protection of bored piles of the excavation simultaneously with the development of the excavation , installing drainage elements 4, made, for example, from panels of non-woven synthetic material, and fastening elements of the enclosing wall 5 to the reinforcement releases 6, m last row of cladding elements

walls 5, installed at the level of the bottom of the excavation, are provided with through channels 7 communicating with drainage elements 4.

As a result of the application of the proposed

The device achieves a significant reduction in the volume of earthworks, an increase in the reliability of the device operation by eliminating the need for disrupting the natural state of the soil, located behind its own, and full safety of work, due to the fact that the development of the excavation and the device of the drainage elements and the enclosing wall at

This significantly reduces the required land allotment, which is especially important when excavating pits in resort areas or urban areas.

Claims (2)

1. The device for fastening the slope of the pit in the non-rock and semi-rock soils, including the combined grillage piles, enclosing wall and draining elements, characterized in that, in order to reduce the amount of earthwork, increase the availability of land by eliminating the need for disturbing the natural state of the surrounding soil and ensuring safety of work, draining elements are placed between the enclosing wall and its walls facing and the enclosing wall is made with through channels in the lower part communicating with drainage elements. 2. The device according to claim 1, characterized in that the draining elements are made in the form of panels of non-woven synthetic material. Sources of information, shares, taken into account during the examination 1. USSR author's certificate No. 390225, cl. E 02B 3/06, publ. 1973. 2. Instructions on the design of protection from landslides of settlements, buildings and structures. Moscow, Ministry of Housing and Communal Services, 1976, p. 108 (Prototin).