RU2166685C1 - Method of trenchless replacement of underground pipelines - Google Patents

Abstract

FIELD: construction industry. SUBSTANCE: method may be used during trenchless replacement of old underground pipelines by means of "well-to-well" technology. Method consists in passing of working member including dismantling-assembled parts through old pipeline, centering it in input pit relative to old pipeline by successive introduction of working member parts into old pipe and drawing-in of new pipeline behind it. Prior to centering, working member is assembled by hinge-jointing of its parts to one another outside input pit and coupled with pull rope passed through old pipeline. When introducing working member into old pipeline it is positioned at an angle with respect to old pipeline. EFFECT: simplified work under difficult conditions. 5 dwg

Description

 The invention relates to construction production and can be used for trenchless replacement of old underground pipelines.

 A known method of replacing pipes (EP 0216100), including the destruction of the old pipeline, pressing fragments into the surrounding soil by passing through the destructible pipeline of the working body and pulling a new pipe into the well formed.

 The disadvantage of this method is the need to dig large pits (in length), the inability to perform work in cramped conditions.

 A known method of trenchless replacement of pipelines (RF patent 2116547), including passing through the old pipeline from the inlet pit to the receiving working body, consisting of collapsible nodes, and tightening a new pipeline behind it. The nodes of the working body are sequentially inserted into the old pipe. Assembling nodes with each other is carried out in the input pit. This makes it possible to work from smaller pits.

 The disadvantage of this method is the complexity, the inconvenience of assembling an organ from nodes in the cramped conditions of a pit or a small well.

 The technical problem solved by this invention is to increase the efficiency of convenience.

 The problem is solved in that when trenchless replacement of underground pipelines, including passing through the old pipeline of the working body, consisting of collapsible nodes, alignment in the inlet pit relative to the old pipeline by sequentially introducing the nodes of the working body into the old pipe and tightening a new pipeline behind it, before alignment carry out the preliminary assembly of the working body by means of articulation of nodes between themselves. This allows you to increase the safety, reliability of delivery of nodes to the pit in cramped conditions and create fairly convenient working conditions.

 It is advisable to preassemble the working body to carry out the input pit. This will increase the quality, convenience and productivity.

 It is advisable to center the working body relative to the old pipe to place the working body at an angle to the axis of the old pipe. This will increase the convenience of supplying nodes to the input pit.

 The invention is illustrated by drawings.

 In FIG. 1 shows a working member inserted into the inlet pit at an angle to the axis of the old pipe.

 In FIG. 2 shows the alignment and introduction into the old pipe of the first node of the working body.

 In FIG. 3 shows the alignment relative to the axis of the old pipe of the second node of the working body.

 In FIG. 4 shows the introduction of the second node into the old pipe and the alignment of the third node of the working body.

 In FIG. 5 - introduction of a new pipeline.

 The proposed method is implemented as follows.

 The working body is pre-assembled on the surface from nodes 1,2,3 and connected to the traction element passed through the old pipe 4 through the old pipe 4, for example, cable 5. Next, the working body is lowered into the input pit 6 perpendicular to the old pipe 4 (Fig. 1). Then the first node 1 of the working body is centered relative to the old pipe 4 and introduced using the traction element 5 into it (Fig. 2). After that, the second node 2 of the working body is centered relative to the old pipe 4 (Fig. 3). Then, using the traction cable 5, nodes 1 and 2 of the working body are introduced into the old pipe 4 (Fig. 4). The third node 3 of the working body is centered relative to the old pipe 4. Next, the drive of the working body (unit 3) is put into operation and the entire working body is introduced into the old pipe 4 by tensioning the traction cable 5. Then they attach to it the first section of the new pipeline 7 and continue to work, sequentially increasing sections of the new pipeline.

 After the replacement of the old pipeline 4 with a new 7 and exit to the receiving pit of the node 1 of the working body, the node 1 is oriented vertically upwards, then the subsequent nodes of the working body are oriented vertically upward and the entire working body is removed from the receiving pit.

 Thus, the proposed method allows you to perform work on the replacement of pipelines using pits of small diameters by a working body that exceed the length of the pits in length, while ensuring ease of use. It is especially effective to apply the method when replacing large-diameter pipes, when the equipment is also large and the assembly of the working body from the nodes directly in the pit (as a rule old wells are used as pits) is extremely difficult and time-consuming. Moreover, the implementation of the method makes it possible to completely exclude the presence of an operator in a cramped well during assembly, alignment and introduction of a working body into an old pipe; allows to lay down a new pipeline, the diameter of which is almost equal to the diameter of the well, as no space is required in the well to accommodate the operator.

 The same advantages this method provides when removing the working body from the receiving well.

Claims (1)

 A method for trenchless replacement of underground pipelines, including passing through an old pipeline a working body consisting of collapsible units, centering in the inlet pit of the working body relative to the old pipeline by sequentially introducing nodes of the working body into the old pipe and tightening a new pipeline behind it, characterized in that before by alignment, the traction cable is passed through the old pipeline and the device is preassembled by sequential, for example articulated, connection eniya to each other and the rope dismountable device nodes, the connection of each cable to the other and dismountable assemblies produce pit is input.

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