RU2366781C2 - Design of barrier for reinforcement of trench walls in performance of earth works - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention is related to the field of construction or repair of oil and gas pipelines and other engineering communications, in particular for reinforcement of walls in trenches of pits dug in ground during performance of repair or installation of pipelines of main and field oil and gas pipelines under conditions of looseness and floatage of grounds, also under conditions when possibility is not available to dig trenches by stockpile method. Fencing of working zone for performance of repair works of deepened sections of gas line consists of two walls and frame assembled from 2 spacers and 5 rods. Metal-plastic walls consist of frame welded from aluminium profile, two linings of glass-cloth laminate and filler from foamed self-extinguishing polystyrene. Spacers and rods are arranged as integral from rolled aluminium.

EFFECT: reduced weight of structure elements, possibility of sectional assembly of fencing in site of works performance and possibility to perform assembly manually without application of weight-lifting mechanisms by team of 4 people.

5 cl, 2 dwg

Description

The present invention relates to the field of construction or repair of oil pipelines and other utilities and is intended to strengthen the walls of trenches and pits dug in the ground during the repair or installation of technical equipment, trunk, technological and oil and gas pipelines in the conditions of flowability and buoyancy of soils, as well as other conditions when there is no possibility of digging trenches using the blade method.

A known design of a light chamber mixture (Series 100), consisting of aluminum modular panels weighing up to 132 kg, which allows you to install fasteners in a trench without the use of any equipment. To ensure safe operation of the structure, the panels are made of aluminum of increased strength type F 25 [1].

The disadvantage of this design is its high cost, caused by the use for the manufacture of expensive special aluminum alloy.

Closest to the proposed invention in technical essence is the design of the box for emergency work, assembled from two shields connected by four turnbuckles. The panels are a welded structure made of steel profile, lined with a steel sheet with a total weight of 350 kg. On one side of the shield, round guide rods are welded, which have holes for fixing the lanyard on them with locking fingers. Brackets for installing end beams are welded on the end faces. End beams, as well as lanyards, are locked with fingers. In the formed gap between the end beams, end pipe boards are installed that are in a freely suspended state, which allows you to bypass the contour of the pipe laid in the trench, ensuring minimal soil shedding into the inner cavity of the box. In assembled form, the box is a closed structure on four sides. The assembly of the structure is carried out on a flat platform equipped with lifting equipment [2].

A significant drawback of this design is the large mass of its constituent elements, which leads to the need to use special lifting equipment when working with the device.

The objective of the invention is to reduce the mass of the product, to obtain the possibility of mounting the structure in the field without the use of special lifting mechanisms, reducing the cost of products.

This goal is achieved by using the enclosing structure of figure 1, consisting of 2 aluminum-plastic walls 1 and the frame, consisting of 2 spacers 2, made of aluminum pipes connected by four longitudinal and one diagonal rods 3. The walls are attached to the frame of FIG. .2 by means of wedge grips 5 and 6 and are fixed by locking pins 7.

The aluminum-plastic wall of the glued structure consists of a frame welded from an aluminum channel, two sheaths of fiberglass type KAST and a filler made of foamed self-extinguishing polystyrene. The walls from the inside in the lower part at 2/3 of the height are protected from open fire (gas torch or welding arc) with foil.

The spacer, unregulated in width of the welded structure, is made of aluminum pipes and has restrictive brackets for fixing the walls and brackets for installing connecting rods. In each strut horizontal pipes are welded, which act as steps of the stairs. In the upper horizontal strut tube there is an opening for attaching the additional walls

Wedge grips are used to quickly connect the walls to the frame and consist of L-shaped support brackets located on spacers 2 to 4 pieces, and wedges 5, welded to the frame walls of 4 pieces.

The enclosure set of Fig. 1 includes additional, quickly mounted two walls 4, increasing the height of the enclosure if necessary by 0.8 m. The design of the additional walls is similar to the main ones.

Made fencing of the claimed design are characterized by a lower mass of components compared to the above similar products. The lightness of the elements (wall weight not more than 65 kg, the weight of the spacer 19 kg) and the ease of installation of the structure allow it to be used in the field without the use of special equipment, which greatly expands the possibilities of using the product. The use of inexpensive materials for the manufacture of panels significantly reduces the cost of products.

Information sources

1. Support for trench construction Proect Stopi.ru Based on materials from SBH COTRAHC. Handbook "Builder" 6/2002, STC "Stroyinform".

2. Box for emergency operations TYPE УОЩ ТУ 4859-005-46270584, Certificate of conformity ROSS Р RU. MT15 / H00004. LLC Company of Special Projects ITON - prototype.

Claims (5)

1. The fence of the working area for repair work of buried sections of the gas pipeline, consisting of two walls and a frame assembled from two spacers and five rods, characterized in that the metal-plastic walls consist of a frame welded from an aluminum profile, two claddings of fiberglass and a filler made of foamed self-extinguishing polystyrene, and spacers and rods are made of solid aluminum. 2. The fence according to claim 1, characterized in that the connection of the walls with spacers is carried out using wedge grips with fixing the working position with the help of pins. 3. The fence according to claim 1, characterized in that to increase the height of the walls in the kit provides quick-mounted additional walls, allowing to increase the height of the fence by 0.8 m 4. The fence according to claim 1, characterized in that the inner surface of the main walls at 2/3 of the height from the bottom is covered with a metal foil that protects the fiberglass wall sheathing from the effects of metal spatter when welding the pipeline. 5. The fence according to claim 1, characterized in that each spacer has a built-in staircase.

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