Method of trenchless pipeline installation

 

(57) Abstract:

The invention relates to the field of mining and construction, namely, the method of pipeline construction in unstable and non-uniform soils. The inventive method includes operations for the passage of the pit, the development of soil in the bottom inside of the shield shell, the junction of the segments of the pipeline between themselves and with the shield shell and promotion of the pipeline behind the shield shell. Before the development of the soil at the bottom of the pit erect the tray with the guides under the shield and the pipe. Consisting of a control room envelope embedded in the ground separately head and tail parts. The head part of the shield shell is moved relative to the tail portion of the flexible path, and the tail together and coaxially with the head section of the pipeline. Subsequent segments of the pipeline promote flexible trajectory relative to each other. All movements are performed with emphasis in the tray. The invention provides improved productivity while reducing labor and material costs. 3 Il.

The invention relates to the field of mining and construction, and more specifically to a method of laying a pipeline to the ground.

As you know, tunneling, or construction of pipelines in unstable and heterogeneous soils is accompanied by higher costs of energy and the complexity of the technological process in connection with the necessity of excavation under the protection of temporary roof support and rigorous monitoring of compliance with penetrations along the specified line.

Known methods of tunneling excavation with the help of the shield of the three circular sections, which moves in the direction of penetration separately to reduce the resistance referred to the movement in the soil (see, for example, and. C. the USSR N 579426, M. class. E 21 D 9/06, 1977).

The disadvantage of this method is the difficulty of exercising control over compliance with the specified direction of penetration, since the sections move relative to each other coaxially only, i.e. on the hard path within the longitudinal dimension of the shield shell.

There is also known a method of trenchless laying of the pipeline with the cutting head, the body of which is made in the form of a shield shell pivotally connected with the head section of the pipeline (see , for example, and.with. USSR N 231983, M CL E 21 D 9/21, 1966).

The disadvantages of this method are a narrow scope of his fortress of process in connection with the need to move to ground the shield shell entirely along its length.

Closest to the proposed technical solution is the way trenchless laying of pipeline from a single connected between the segments, including the passage of the pit, erection of the tray with the guides under the shield and the pipeline prior to excavation at the bottom of the excavation, the excavation in the mine from the inside of the shield shell, the shipment of soil from the bottom, introduction to ground the shield shell by a flexible trajectory and promotion of the pipeline behind the shield shell, with the head segment of the pipeline promote coaxially with the rear part of the shield (see , for example, and.with. USSR N 1836565 A3, M CL E 21 D 9/00, published. 1993) prototype.

The disadvantages of the prototype method is the high energy consumption due to the great effort of the introduction of the shield as a whole in the ground and low maneuverability of complex equipment with pipeline and, consequently, the accuracy of the pipeline.

The main objective of our proposed technical solution is a new way of trenchless laying of the pipeline, providing a relatively low energy intensity of the process, the high maneuverability of complex equipment and performance with minimum Tr is the, that way trenchless laying of pipeline from a single connected between the segments, including the passage of the pit, erection of the tray with the guides under the shield and the pipeline prior to excavation at the bottom of the excavation, the excavation in the mine from the inside of the shield shell, the shipment of soil from the bottom, introduction to ground the shield shell by a flexible trajectory and promotion of the pipeline behind the shield shell, with the head segment of the pipeline promote coaxially with the tail of the shield, consisting of a control room envelope embedded in the ground separately head and tail parts with emphasis in the tray, but following the head section of the pipeline, promote flexible trajectory relative to each other.

The essence of the claimed technical solution is illustrated below by the example of his particular performance, illustrated in the accompanying drawings, which schematically:

Fig. 1 is a General view of an apparatus for implementing the inventive method in the initial position before the operation of the excavation in the mine,

Fig. 2 - the relative positions of the main elements of the device according to Fig. 1 when the deviation of the shield from the axis of the track,

Fig. 3 - the relative positions of the main elements ustroysva here the example of the pipeline is as follows.

Before working part of the track 1 of the pipeline construct pit 2, on the prepared bottom of which set the tray with the guides 3 and they set the shield containing the shell from the head 4 and rear 5 parts, which are connected with the possibility of radial and axial displacement by hydraulic cylinders 6. The guides also serve for placing the discharge station 7 cylinders 8 and the stop 9 and pipe 10 of the hinge connected to each other with lengthy segments.

After installation of the equipment begin to develop the soil in the pit manually or by mechanical method.

The development of the face produce while promoting only the head part 4 of the shield shell by hydraulic cylinders 6.

After advancing the head part 4 on the value of zagadki produce, push the head section of the pipeline together with a tail part 5 of the shield shell by hydraulic cylinders 8 of the pressure station 7, is fixed on the tray with the guides 3 with the stop 9.

Due to the fixed connection of the head section of the pipeline with a tail part 5 of the shield shell of their progress will be aligned to the management Board.

The push the head section of the pipeline carried out by a value not less than the length of the next segment. After this discharge station divert ago, set on the tray with the guides in the vacant space next piece of pipe and pivotally connecting it with the previous cut to obtain a flexible path of movement of the assembled pipeline, providing the exception of its deviation from the specified route under controlled movements of the head part of the shield shell and the constant emphasis in the tray with the guides.

Thus, we have developed a technical solution improves accuracy and simplifies the process of laying the pipeline through the totality of the declared characteristics, namely by providing the possible motions of the flexible path by hydraulic cylinders only the head part of the shield shell, the promotion of the tail portion of the shell together with the head section of the pipeline, and promote subsequent segments of the pipeline on the flexible path. All of the mentioned actions carried out while maintaining the base control given the route of the pipeline.

Method of trenchless laying of pipeline from a single suboperad before the development of the soil at the bottom of the pit, the development of the soil in the bottom inside of the shield shell, the shipment of soil from the bottom, introduction to ground the shield shell by a flexible trajectory and promotion of the pipeline behind the shield shell, with the head segment of the pipeline promote coaxially with the tail of the shield, wherein consisting of a control room envelope embedded in the ground separately head and tail parts with emphasis in the tray, and the following main segments of the pipeline promote flexible trajectory relative to each other.

 

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SUBSTANCE: a reciprocating striker is positioned in the casing of the pneumatic percussion mechanism. The air-distributing system of the mechanism includes the front and rear working chambers, inlet and exhaust valves and a fixture for closing and opening of the exhaust channels made in the form of a spring-loaded end face stopper coupled to a tractive member. At actuation of the pneumatic percussion mechanism, before the supply of compressed air, the exhaust channels are closed, they are opened after the inner cavities of the pneumatic percussion mechanism are filled with compressed air.

EFFECT: provided automatic cyclic action of the pneumatic percussion mechanism.

3 cl, 3 dwg

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