Pipe burying method

Abstract

The invention provides a pipe burying method by which a diameter of a pilot hole can be efficiently and reliably enlarged depending on various types of soil and a burying operation of a buried pipe is made stable. The method involves preparing various types of platy members, selecting a platy member suitable for a soil type from among the various types of platy members on the basis of a soil type search of a burying place, and attaching the selected platy member to a reamer main body, thereby forming a reamer suitable for the soil type. The method further involves annexing this reamer at a front end of a rod in a pilot hole, and pulling out this rod from the pilot hole while rotating the reamer together with the rotation of the rod, thereby burying a buried pipe to be connected to the reamer in the earth.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a pipe burying method for burying a pipe such as a water pipe, a gas pipe, a drain pipe, a sheath pipe for a signal cable, and a fiber cable or the like (hereinafter, referred to as “a buried pipe”) in the earth. [0003] 2. Description of the Related Art [0004] A pipe burying method for burying a pipe such as a water pipe, a gas pipe, a drain pipe, a sheath pipe for a signal cable, and a fiber cable or the like (hereinafter, referred to as “a buried pipe”) in the earth is roughly divided into a drive construction method for driving the earth and burying a pipe, and a non-drive construction method for burying a pipe without driving the earth. The both construction methods have an advantage and a disadvantage, respectively. In other words, as compared to the drive construction method, the non-drive construction method has an economical advantage such that a pipe can be easily buried as ...

AI Technical Summary

Benefits of technology

[0013] The present invention has been made taking the foregoing problems into consideration and an object thereof is to provide a pipe burying method by which a diameter of a pilot hole can be efficiently and reliably enlarged depending on various types of soil and a burying operation of a buried pipe is made stable.

[0015] According to the pipe burying method of the first aspect, since the reamer 6 is suitable for a soil type of a burying place where the pilot hole 5 is formed, the reamer 6 can drill the earth by the drilling amount corresponding to the soil type and evading falling of earth and sand into the hole with the enlarged diameter after enlarging the diameter, the reamer 6 can smoothly carry out the retracting operation of the buried pipe 1. In addition, preventing excess load and friction force from being given to a drilling blade of the reamer 6, the damage of the reamer 6 can be prevented. Thereby, the used reamer 6 can be used stably for a long time. Further, by changing a platy member 9 to be attached to a reamer main body 8, various types of reamer 6 can be formed and this makes it possible to form the reamer 6 easily corresponding to a soil property of the burying place. In this case, since the reamer main body 8 can be shared, a cost can be decreased and stock control becomes simple. In the mean time, in the case of forming the reamer 6, the platy member may be attached to the reamer main body 8 at a scene of burring, or before going to the burying scene, the platy member 9 suited for the soil type of this burring scene may be attached to the reamer main body 8 so as to form the reamer 6 that is suited for the soil type. If the platy member 9 is attached to the reamer main body 8 at the burying scene, even if the soil type at the burying scene is different from the soil type that was inspected in advance, by attaching the platy member 9 to the reamer main body 8 at this burying scene, it is possible to form the reamer 6 that is suited for the soil type. In addition, if the platy member 9 is attached to the reamer main body 8 before going to the burying scene, it is possible to omit the attachment operation (operation such as welding or the like) at the burying scene and the burring operation time can be shortened. Further, since there is no necessity to bring a welding device or the like to the scene, an operator can easily move to the scene.

[0017] According to the pipe burying method of the second aspect, since the reamer 6 that is suited for a soil type of the burying place among plural types of reamer 6 at the burying scene, by using the reamer 6 in accordance with various types of soil, the diameter enlargement operation of the pilot hole 5 can be carried out and this leads to the stable pipe burying operation.

[0019] According to the pipe burying method of the third aspect, since various types of reamer 6 can be formed by changing the platy member 9 to be attached to the reamer main body 8, it is possible to simply form the reamer 6 that is suited to the soil type of the burying place. In addition, also in this case, if the platy member 9 is changed, different types of reamer 6 can be formed, so that the reamer main body 8 can be shared. Thereby, the cost can be decreased and the stock control can be simply carried out.

Problems solved by technology

In addition, since the sandy soil has a large falling property, it is necessary to make a blade height of the drilling blade small (in this case, if the height of the drilling blade is made low, an amount of drilling is made small).

In addition, in the soft soil, a reamer having a large blade width and a high blade height can be used, however, if the blade width is large in the soft soil, the friction resistance becomes large, so that the reamer itself is damaged or a large rotation driving force is needed.

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