Method of trenchless laying of pipelines

 

The invention relates to the construction technology and can be used for trenchless laying in the ground pipelines of large diameter with high precision. The technical problem solved by this invention is the expansion of the use of the method by increasing the diameters of underground pipeline while maintaining precision strip. This is achieved by the fact that at the trenchless laying of pipelines, including the sinking of the leader of the borehole, the formation of well sealed walls and the delay of the pipeline, the top hole is formed by extracting the soil with the adjustment direction, the mass of excavated soil shall be not less than half of the mass is subsequently compacted soil. Leader wells may be formed as directional drilling and circular clearing, for example, self-propelled gruntsgabalam device with constant adjustment direction. It is advisable to remove the soil is greater than the higher density of the soil on the track. This allows you to lay the pipelines of the big sizes in sealing the soil without the use of large power plants power the tion relates to the field of construction equipment and can be used for trenchless laying of large diameter pipelines.

The known method of trenchless laying of underground utilities (e.g., SPM No. 7696, CL E 02 F 5/18), according to which the self-propelled percussion mechanism in the soil are well sealed walls and simultaneous tightening attached to the percussion mechanism of the pipeline.

The disadvantage of this method is the low accuracy of drilling a well, because the mechanism has no means to adjust the direction of drilling. In addition, this method can only be applied to pipelines small diameter up to 300 mm, since the sinking of the well seal the soil can be compacted to a certain value, then there is a destruction of the skeleton of the soil, which leads to a sharp increase in energy costs.

The known method of trenchless laying of pipelines on the application Germany No. 2824915, according to which are self-propelled premodernism hammer first clearly aimed leader well small, and further extend through the sealing hammer of larger diameter, jam through with the rope, getting a well sealed walls. In the resulting borehole enter the pipeline, which is mounted on sealing the hammer.

Disadvantage: the meter (up to 400 mm). The increase in the diameter underground pipeline leads to a sharp increase in energy costs, the possibility of a "bulging" of the daily soil layer and, consequently, increase the value of a strip.

The technical problem solved by the invention is the expansion of the use of the method by increasing the diameters of underground pipeline, while maintaining precision strip.

This task is solved in that at the trenchless laying of pipelines increased accuracy, including the sinking of the leader of the borehole, the formation of well sealed walls and the delay in its pipeline, with the top hole is formed by extracting the soil with the adjustment direction, and the mass of excavated soil shall be not less than half of the mass is subsequently compacted soil. This will allow you to lay the pipelines of the big sizes in sealing the soil without the use of large power plants power and saving without changing the surface.

It is advisable in poorly compacted soils and high strength to produce removing the soil from the top of the well directional drilling. This provides the necessary RMS is x average density to produce removing the soil from the top of the circular hole cleaning, for example, self-propelled gruntsgabalam device with constant adjustment direction. This gives the ability to control the direction of penetration after each cycle.

It is advisable to extract the mass of the soil is greater than the higher density of the soil on the track well, because in dense soil to obtain a wall with the necessary strength required less compacted soil.

The method is illustrated by the drawings.

In Fig.1 presents the education leader of the well drilling.

In Fig.2 - formation of the self-propelled well gruntsgabalam device.

In Fig.3 - formation of compacted walls and the delay of the pipeline.

The method is as follows.

In the entrance pit 1 (Fig.1) establish a drilling rig 2 and produce directional drilling leader wells 3 diameter d. In the drilling process produces the adjustment direction with a special device 4. Another option run leader well may be the use of self-propelled suction head; it is 5 (Fig.2), which is placed in the input sump 1. Self-propelled groundsamine device 5 start in the right direction for a certain length, after filling it with soil condition the deflection adjusting movement by means of a special tool to adjust the direction of movement, for example, installing the front portion of the knife 6 corresponding form, which provides correction of the admitted error. The device will then start again in the well. The cycles are repeated to obtain the top holes of the required length. After the formation of the leader of the well 3 it starts sealing device 7 (Fig.3) diameter D prisoedinim to him pipeline 8. As you progress through the bore 3 of the sealing device 7 forms a hole of diameter D with sealed walls 9 and tighten for a laid pipeline 8. As the sealing device can be used as self-propelled air, hydraulic, electrical devices, so the device is pulled, for example, using a rope. The diameter of the leader of the well d and the diameter required for the laying of the pipelines, wells D are chosen so that the mass of spoil was not less than half the mass of the compacted soil in the formation of wells with diameter D. In the case when the soil more dense, the diameter of the leader of the well d increase to for further education wells D, sealed walls remained less than the volume of the soil.

The proposed method obey laying sewers, does not require the use of large areas for technological works (all works are carried out from one pit, removing the soil is much less than for the same volume without compaction).

Claims

1. Method of trenchless laying of pipelines increased accuracy, including the sinking of the leader of the borehole, the formation of well sealed walls and the delay in its pipeline, characterized in that the top hole is formed by extracting the soil with the adjustment direction, the mass of excavated soil shall be not less than half of the mass is subsequently compacted soil.

2. The method according to p. 1, characterized in that the top hole is formed by a directional drilling.

3. The method according to p. 1, characterized in that the leader well form a cyclic cleaning, for example, self-propelled gruntsgabalam device with constant adjustment direction.

4. The method according to any of paragraphs.1-3, characterized in that the mass of extractable soil is greater than the higher density of the soil on the track.

 

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FIELD: construction, applicable for trenchless laying and replacement of underground pipe-lines.

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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