RU2103444C1 - Method for trenchless laying of pipelines - Google Patents

Abstract

FIELD: construction engineering. SUBSTANCE: this relates to trenchless laying of service lines. According to method, tube of increased length is driven into ground. This requires high axial shock loads to be applied by means of striking mechanism with subsequent cleaning of tube from ground contained in it. Axial shock loads are applied in middle part of tube. This improves transmission of force and cuts energy consumption. Substantial increase of length of pipeline driven can be achieved if at force application point, tube is cut into pieces with cleaning them individually, and after cleaning front part of tube and connecting rear part to it, driving is continued to end, with cleaning performed from front end of tube. EFFECT: high efficiency. 6 dwg

Description

 The method relates to the technology of construction production, in particular to the trenchless laying of underground utilities, can be used for trenchless laying of pipelines in any type of soil.

 A known method of trenchless laying of underground utilities, which consists in placing an additional shock mechanism in the head of the laid pipeline.

 The disadvantage of this method of laying is that the laying is carried out by the closed end of the pipe, which, in turn, creates the need to increase the impact energy of the shock mechanism to overcome the ground drag forces. Moreover, if the frontal resistance of the soil remains constant, then the resistance of the soil along the lateral surface of the pipeline increases as it becomes clogged, which leads to the disconnection of the components of the pipeline. This method of laying is quite energy-intensive, since it implies the use of two shock mechanisms, as well as unreliable and can be used in a limited type of soil (sandy soil, soil of normal humidity). In clay soils, its frontal resistance significantly increases, which complicates the laying process and reduces the length of the laid pipeline.

 There is a method of trenchless laying of underground utilities, in which the pipe with its open end is driven into the ground and the soil is cyclically removed from it by moving the baffle.

 The disadvantage of the above method, in which the clogging of the pipe is carried out by means of a rear mechanical impact using the shock mechanism, is the absorption of the shock wave by the clogged pipe until the entire length of the laid pipeline is set. As a result, the gasket is limited in length.

 The technical task of the invention is to increase the length of the clogged pipe. To solve this technical problem, in a method of trenchless laying of a pipeline, including driving a pipe into the ground by applying axial shock loads to it using a shock mechanism, subsequent cleaning of the pipe from the ground, axial shock loads lie in the middle of the pipe. The shock impulse with this laying method is applied closer to the bottom and is more efficiently transmitted to the ground, and also attenuates less along the length of the pipe. This allows you to increase the length of the laid pipeline.

 It is advisable to increase the length of the pipe to be hammered and to approach the bottom of the point of impact in the method of trenchless laying, to divide the pipe to be chipped and to disconnect the back of the pipe from the front, hammer and clean the front of the pipe, then attach the back of it and continue to drive without cleaning, and clean from the front end of the pipe.

 Disconnecting the rear of the pipe reduces its mass and length, increases the efficiency of impulse transmission to the bottom, and thereby increases the length of the gasket. In addition, cleaning part of the pipe makes it possible to increase the cleaning speed and gasket productivity.

 Clogging the entire length of the pipeline and cleaning it from the front end increases the speed of cleaning and eliminates the need to lose time on moving the baffle along the already cleaned pipe, as is the case with known laying methods.

 In FIG. 1 shows a method of laying a pipeline at the time of blocking a portion of the pipe; in FIG. 2 - a method of laying a pipeline at the time of laying an already cleaned part of the pipe; in FIG. 3 - a method of laying a pipeline at the time of clogging of the pipe to the output pit; in FIG. 4 - a method of laying a pipeline at the time of disconnection of the rear of the pipe; in FIG. 5 - a method of laying a pipeline at a time when the front of the pipe is cleaned and its rear part is attached; in FIG. 6 is a method at the time of complete laying of the pipeline to the output pit.

 The method is as follows.

 The pipeline 1 with the shock mechanism 2 located inside (for example, a pneumatic punch) in the middle of the pipeline 1 is driven from the pit 3 into the pit 4 (Fig. 1). Having scored a part of the pipe, periodic cleaning of the pipe is carried out in any known manner (for example, using a choke), before removing the shock mechanism from the pipe. Next, the pipe is driven in, marking the percussion mechanism in its original place, and laying to the pit 4.

 According to claim 2, the method of trenchless laying is as follows.

 The clogged pipe 1 is divided into parts and before the clogging of the pipe begins, its back part is disconnected from the front (Fig. 4), the front part of the pipe is clogged and cleaned, then the back part is attached to it (Fig. 5) and clogging is continued without cleaning, and cleaning is carried out from the front end of the pipe 1 from the pit 4.

Claims (1)

 A method for trenchless laying of pipelines, including driving a pipe into the ground by applying axial impact loads to it using a percussion mechanism and subsequent periodic cleaning of the pipe from the ground, characterized in that the pipe to be clogged is separated into parts and the rear part is disconnected from the front, clogged and clean the front of the pipe, then attach the back to it and continue clogging without cleaning, and clean from the front end of the pipe.

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