JPH0217284A - Method for lubricant injecting piping of jacking pipe - Google Patents

Abstract

PURPOSE:To reduce the number of starting shafts, improve operation efficiency, and curtail the expenses in a jacking method for laying a pipe line in the ground by linking and fixing the end of a lubricant injecting pipe to an introducing body via a traction rod and feeding the lubricant from the end portion. CONSTITUTION:As the method of piping for lubricant injection for a jacking pipe, the end of a lubricant injecting pipe 13 is linked and fixed to an introducing body 2 via a traction rod 3 to feed a lubricant from the end portion thereof. Thereby, the lubricant can be always fed to the periphery of the jacking pipe 1 positioned at the head to reduce the frictional resistance between the jacking pipe 1 and earth around same.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method of piping while smoothly propelling the propulsion pipe in a propulsion method for laying pipes underground. This relates to a propulsion piping method for piping while injecting material.

<Conventional technology> Conventionally, the Jffl construction method has been used to lay pipes underground using pipes such as Hiem pipes, but in order to move the pipes smoothly underground, it is necessary to use lubricants. Therefore, it is effective to inject lubricant around the pipe, and therefore, when propelling a pipe a with a large diameter of <600 mm or more, as shown in Fig. 9 (A) and (B), it is necessary to inject lubricant. Insert the tip of a lubricant injection pipe having a valve d that can be opened into the large-diameter pipe a, connect it to the lubricant injection port C previously drilled in the large-diameter pipe a, and connect the base of the lubricant injection pipe to the ground. A method of supplying lubricant around the propulsion pipe propelled by the propulsion method by piping it in the lubricant injection plant installed in the Instead of inserting the lubricant into the shaft, the tip of the lubricant is placed and fixed around the starting shaft and the large-diameter pipe to be propelled, and a lubricant is supplied around the large-diameter pipe.

On the other hand, in the propulsion method for small diameter pipes of, for example, 500-1 or less, the lubricant is hardly injected at present.

<T5B that the invention sought to solve> However, in the former method of inserting a lubricant injection pipe into a large diameter vibrator, since the lubricant is injected from inside the propelling tube, piping etc. There are problems in that this method often hinders the transport of earth and sand, and it is difficult to change the injection position midway.Furthermore, the latter method has problems such as slipping around the fli advance pipe only near the starting shaft. Because the lubricating material is supplied, it is impossible to supply the lubricating material to the tip of the propulsion tube, that is, near the leading body, and therefore it is less effective for the purpose of smoothing propulsion and extending the propulsion distance. There were other problems.

Means for Solving the Problems> The present invention provides a method for propelling a propulsion pipe while injecting a lubricant, in which the tip of the lubricant injection pipe connected to a lubricant injection pump is connected to the lubricant injection pump through a traction rod. A lubricant injection piping method for a propulsion tube, characterized in that the propulsion tube is connected and fixed to a leading body attached to the head of the propulsion body, and the propulsion tube is propelled while pouring lubricant from the tip of the injection tube. be.

<Function> As described above, the present invention connects and fixes the tip of the lubricant injection tube connected to the lubricant injection pump to the outer circumferential surface of the guide body via the traction rod, and from the tip of the lubricant injection tube. Since the lubricant is poured out, the lubricant can also be supplied to the tip of the propulsion tube located at the front, which allows the propulsion tube to be propelled smoothly and efficiently, significantly shortening the propulsion distance. It can be extended.

If another lubricant injection pipe is installed in the middle of the first lubricant injection pipe connected and fixed to the outer peripheral surface of the leading body, not only the leading propulsion pipe but also other ItLils following this leading propulsion pipe A lubricant can also be supplied around the pipe.

<Example> An example of the piping method according to the present invention will be specifically described with reference to the drawings. In FIGS. 1 to 7,! 1 is a plurality of fume-mounted propulsion tubes arranged in sequence, and a guide member 2 is attached to the tip of the leading propulsion tube l. At the bottom of the outer periphery of this guide body 2, a mounting bracket 4 is provided to which the tip of the traction rod 3 can be attached and fixed. The tip and end of the towing rod 3 each become a spherical end 3a,
The spherical end 3a at the tip is configured to fit into a spherical seat 4a drilled in the mounting bracket 4. Reference numeral 5 denotes a pusher jack that can press the propulsion tubes 1 arranged at the rear end.

Next, 6 is a lubricant injection pipe, and the lubricant 7 is poured out from the side spout 8a at its tip so that the lubricant 7 can be supplied around the propulsion pipe l in the propulsion pipe. A pouring metal fitting 8 is attached that can be used for pouring. This spout IA8 is also provided with a spherical seat joint 8b like the mounting bracket 4, and is configured so that the spherical end 3a at the distal end of the traction rod 3 can be fitted therein.

The tow lot 3 is attached to these spherical seat inserts 4a.

8b, the structure is such that bending stress is not generated in the traction end 3 when the propulsion pipe 1 or the guide body 2 is installed as a propulsion pipe. Therefore, the lubricant injection pipe 6 disposed around the leading propulsion pipe 1 has a spout fitting 8 attached to its tip and is connected to the leading body 2 via the spout fitting 8 and the traction rod 3. , and is configured to be towed by the guide body 2.

A three-way pulp lO and a lubricant injection pump 11 are connected to the end of the lubricant injection pipe 6 via a rubber hose 9.
are connected to each other so that the lubricant 7 can be supplied to the tip of the lubricant injection pipe 6. Reference numeral 12 denotes a joint fitting that can connect the lubricant injection pipes 6 to each other;
There are two types of joints: a main joint and a two-piece joint, and the two-piece joint is used when piping the second lubricant injection pipe 13.

This second lubricant injection pipe 13 has a large number of t(i
Advance! The purpose of the pipe is to supply the lubricant 7 to the parts in the middle of the pipe, and a spouting fitting 14 is attached to the tip of the pipe. The number of lubricant injection pipes 13 is further increased, and the third. It is also possible to pipe a fourth one.

The lubricant injection pipe 6.13 in the above embodiment is made of a carbon steel pipe for piping, and has a length that matches the effective length of the propulsion pipe l.
They are sequentially connected by shield fittings 12 within the shaft. In addition, the lubricant injection pipe 6.13 can be installed either above or below or on the left or right of the outer circumferential surface of the propulsion pipe 1 as required, and after the propulsion pipe 1 has been propelled, the lubricant injection pipe 6.13 can be installed in the grip of the joint fitting I2. It can be easily pulled out using metal fittings and an electric winch.

In the above embodiment, the tip of the towing rod 3 is connected to the guide body 2.
However, in order not to increase the unbalanced pressure resistance during propulsion, the tip of the towing rod 3 is curved and placed inside the leading body 2, as shown in FIGS. 8(A) and (B). It is also possible to bury it.

<Effects of the Invention> As described above, in the piping method according to the present invention, the tip of the lubricant injection pipe is connected and fixed to the guide body via the traction rod, and lubricant is supplied from the tip. It is possible to supply lubricant around the propulsion pipe located at the top, thereby reducing the frictional resistance between the II propulsion pipe and the surrounding soil, reducing the axial load m of the propulsion pipe, and increasing the It is possible to significantly extend the advancing distance, thereby reducing the number of starting shafts, increasing work efficiency and reducing costs! At the same time, it is possible to improve safety when laying the propulsion pipe.

Furthermore, since the method of the present invention does not require a lubricant injection pipe inside the propulsion pipe, there is no risk of interfering with earth and sand transport, and the lubricant can be injected by changing the injection position at the appropriate time.
1&It has the characteristics that lubricating material can be smoothly supplied around the 111 advancement pipe even in the propulsion method of small diameter propulsion tube in cases where work inside the advancement tube becomes impossible. .

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams showing construction examples of the method of the present invention, FIGS. 3 to 7 are enlarged explanatory diagrams of the main parts of the above figures, and FIG.
Figures (A) and (B) are explanatory diagrams of the other side, and Fig. 9 is an explanatory diagram showing a conventional example. 1 is a propulsion pipe, 2 is a guide body, 3 is a towing rod, 4 is a mounting bracket, 4a, 8b are ball seat inserts, 6° 13 is a lubricant injection pipe, 7 is a lubricant, 8 is a spouting metal fitting, 9 is a 1 is a rubber hose, 10 is a three-way valve, 1 is a lubricant injection pump, 12 is a joint fitting, and 14 is a pouring fitting.

Claims (3)

[Claims] (1) In the method of installing the propulsion pipe while injecting lubricant, the tip of the lubricant injection pipe connected to the lubricant injection pump is attached to the head of the propulsion pipe via a tow rod. 1. A method of piping for injecting a lubricant into a propulsion tube, which comprises connecting and fixing the lubricant to a leading body and propelling the propulsion tube while pouring lubricant from the tip of the injection tube. (2) Claim (1) characterized in that another lubricant injection pipe is arranged in the middle of the first lubricant injection pipe connected and fixed to the guide body.
) The piping method for injecting lubricant into the propulsion pipe. (3) The lubricant injection piping method for a propulsion pipe according to claim (1), wherein the tip of the towing rod is embedded in the guide body.