RU2099624C1 - Method of trenchless replacement of pipe line - Google Patents

Abstract

FIELD: repair and replacement of underground pipe lines. SUBSTANCE: old pipe line is removed from mounting pit by breaking it and forming well whose diameter exceeds outer diameter of old pipe line. Old pipe line is removed from two opposite mounting pits to repair coupling. Removal of remaining part of old pipe line and driving the coupling into free pit shall be timed to drawing new pipe line. EFFECT: enhanced reliability. 3 dwg

Description

 The invention relates to construction production and can be used for trenchless replacement of old underground pipelines, in the repair and reconstruction of underground utilities.

 There is a method of trenchless replacement of underground utilities (RF patent N 2003911 C1), which consists in breaking the replaced pipeline, pressing its fragments into the soil mass with the formation of a well and tightening a new pipeline into it using a pneumatic shock mechanism.

 The disadvantage of this replacement method is the need for additional excavation work if a repair metal sleeve is placed on the outer surface of the old pipeline, requiring great energy for its removal. Pneumatic impact mechanism is not always able to cut it.

 Also in the method of replacing an underground pipeline (RF patent N 2003909), including cutting longitudinal grooves on an old pipeline and applying concentrated destructive forces to its walls using cutting ribs located on the body of a pneumatic impact tool, in the presence of a repair metal sleeve on the old pipeline jamming of the tool in connection with the all-metal cast structure of the coupling.

 In practice, in these cases, the soil is excavated at the location of the coupling, its extraction, and then the replacement work continues. This leads to large time losses, costs. physical labor.

 The closest in technical essence is the method of trenchless replacement of an underground pipeline (RF patent N 2003918), which consists in eliminating the replaced old pipeline under the action of the shock load and ramming its fragments into the ground with the subsequent retraction of a new pipeline.

 The disadvantage of this replacement method is that if the shock mechanism meets the repair metal clutch and a significant shock load is applied, the strike mechanism may stop at the moment of contact with the metal repair clutch, which will lead to the need for open ground work and slow down the replacement process.

 The technical problem solved by this invention is the acceleration of the method of replacing the pipeline.

 The proposed replacement method, including the removal of the old pipeline and the retraction of the new pipeline from the mounting wells, is that the removal of the old pipeline leads to a repair sleeve from each of the wells, and then the sleeve is knocked out into one of the mounting wells.

 It is advisable, when removing the old pipeline from the side of the well into which the sleeve is knocked out, to form a well with a diameter larger than the diameter of the sleeve.

 The replacement of the pipeline by this method significantly accelerates the time of the replacement work, as it eliminates the need to break the section of the route at the location of the coupling and remove it using physical labor.

 In FIG. 1 shows a longitudinal section of a replaceable pipeline with one of the possible variants of a device for implementing the proposed method. The essence of the proposed method is shown as an example of specific use.

 A device that implements this method is located inside the old replaceable pipeline 1 from the mounting well 2, consists of a percussion mechanism 3, for example, a pneumatic punch. In the head part of the percussion mechanism 3 there is a reamer 4 having a conical section, the diameter of which is larger than the inner diameter of the old pipeline 1 and more than the outer diameter of the newly laid pipeline 5. A cable 6 is fixed to the front of the percussion mechanism 3, passing inside the old pipeline 1 and connected to the traction a mechanism 7 (for example, a winch) located in the opposite well 8. On the outer surface of the old pipeline 1 is located the repair sleeve 9.

 To implement this method, the device is placed in the mounting well, which is closest to the repair sleeve 9 located on the pipeline 1.

 The method is implemented as follows.

 Under the influence of shock pulses of the mechanism (pneumatic punch) 3 and the efforts of the traction mechanism (winch) 7 transmitted by the traction cable 6, the device moves along the old pipeline 1 to the repair coupling 9, breaking the old pipeline 1 by the expander 4, pressing its fragments into the ground. After driving this section of the track, the device and the traction mechanism 7 are disassembled and the tunneling is carried out in the same way with a new pipeline connected to it from the mounting well 8 to the repair sleeve 9 (Fig. 2). After contact with the coupling, driving is continued until the repair coupling 9 is pushed into the well 2 and the old pipeline is completely replaced throughout the entire section (Fig. 3). The passage of this section is made without difficulty, since the diameter of the sleeve is less than the diameter of the well from the side of the first well. Then, due to the fact that the well has a larger diameter compared to the diameter of the old pipeline 1 and the sleeve 9, the latter is easily knocked out into the mounting well 2.

Claims (1)

 The method of trenchless replacement of the pipeline with the repair sleeve, which consists in eliminating the old pipeline with the formation of a new larger borehole diameter and retracting the new pipe from the mounting wells, characterized in that the old pipe is removed in series to the repair sleeve from two opposite mounting wells, and eliminating the remaining parts of the old pipeline are combined with retraction of the new pipeline and knocking of the repair sleeve into a free mounting well.

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