RU2194903C2 - Method of erection of main pipe line on slope of mountainous terrain - Google Patents

Abstract

FIELD: construction engineering; erection of pipe lines on slope of mountainous terrain. SUBSTANCE: pipe is transported by rail track laid in bottom of trench, joints of pipes are insulated by thermally shrinkable couplings and are protected by envelopes; part of pipe line thus prepared is placed on supports made from soil sacks, after which rail track is dismantled, percolation strips are fitted and trench is filled with ground soil. EFFECT: enhanced reliability.

Description

 The invention relates to construction and can be applied when laying large-diameter trunk pipelines on a slope of mountainous terrain.

 The closest technical solution to the achieved technical result for this invention, adopted as a prototype, is a method of constructing a main pipeline on a slope of a mountainous terrain, providing for tunneling from top to bottom along the slope of the trench of a given section, transporting the pipe along the trench from top to bottom along the slope, assembly and welding ( installation) of the pipeline in the direction from the bottom up the slope, isolating the pipe joints, laying the finished section of the pipeline whip in the trench and filling it with soil from top to bottom along the the bosom (Borodavkin P.P., Globa V.M. Construction of pipelines in the mountains. - M .: Nedra, 1978, p. 98-122).

 The disadvantages of the known technical solution are the transportation of the pipe by drag along the trench, which destroys the factory insulating coating of the latter, does not provide technological alignment of the pipes (assembly of joints) on the slope, and the absence of filter bridges and bedding under the pipeline, which increases the risk of the removal of particles of soil filling the trench (erosion) . These disadvantages of the known technical solutions reduce in the aggregate the operational reliability of the main pipeline as a whole.

 The technical result (TR) of the invention is to increase operational reliability in sections of the main pipeline in mountainous terrain.

 The specified technical result is achieved by the fact that in the method of constructing a main pipeline on a slope of mountainous terrain, providing for tunneling from top to bottom along a slope of a trench of a given section, transporting a pipe through a trench from top to bottom along a slope, assembling and welding (assembling) a pipeline in a direction from bottom to top on a slope, insulating pipe joints, laying the finished pipeline section in the trench and filling it, additionally level (plan) the bottom of the trench, onto which the rail track is laid, which is fixed at the bottom of the trench, pipes are transported along the rail, placed along the route between the rails a number of supports from bags of soil, isolate the joints of pipes with heat-shrinkable couplings and protected with rock sheet wraps, lay the finished part of the pipeline on supports from bags with soil, dismantle the rail track , install along the route across the trench a series of filtering bridges, fill the sections of the trench with the pipeline between the filtering bridges from top to bottom along the slope with pre-ground soil.

 The method is implemented, for example, as follows. A trench with a width of 3.5 - 4.0 m is passed with the help of a scraper moved by a winch and a cable system. The rail track is assembled from pre-prepared sections, and each rail thread is mounted on separate half sleepers with the possibility of their convenient assembly and disassembly and anchor from displacement along the slope.

 The movement of single pipes or sections of several pipes is carried out using several, for example two, interlocked bogies. As a base, a cart from the OSD-3 launching kit can be used for laying pipeline siphons at the crossings of large rivers designed by Gazstroymashina Design Bureau, somewhat improved. A hand hoist with a carrying capacity of up to 5 tons is suspended on the trolley pylons, which allows for the supply of pipes to the slope, but also for installation and laying operations. In addition, hinged seats are installed on the frames of the trolleys for laying and securing the pipes in the transport position.

 The beginning of the movement of the bogies in the upper (horizontal) loading platform is provided by the pipe layer, and support for the movement of the bogies along the slope and return to the platforms with a cargo winch and a cable system.

 Alignment of the joint is carried out using hoists mounted on the pylons of carts. During assembly and installation operations, the center of gravity of the pipes rises. Therefore, on the installation site, the carts are attached with special grips for the rails.

 The construction of the pipeline in a glen with two steep slopes lead from the bottom up on both slopes at the same time.

Claims (1)

 A method of constructing a main pipeline on a slope of mountainous terrain, providing for the passage of a given section of a trench from top to bottom on a slope, transporting a pipe along a trench from top to bottom on a slope, assembling and welding (assembling) a pipeline in a direction from bottom to top on a slope, insulating pipe joints, laying a finished pipeline section into the trench and its backfill, characterized in that they level (plan) the bottom of the trench, lay the rail track at the bottom of the trench, which is fixed at the bottom of the trench, transport the pipe on the track, between the rails along the route, a number of supports from bags of soil are placed, pipe joints are insulated with heat-shrinkable couplings and insulated with rock sheet wraps, the finished part of the pipeline is laid on supports from bags with soil, the rail track is dismantled, a number of along the track across the trench are installed along the trench along the trench filtration lintels, sections of the trench with the pipeline between the filter lintels are filled sequentially from top to bottom along the slope with pre-ground soil.