JPS6019813A - Mandrel and method for driving drain material - Google Patents

Abstract

PURPOSE:To drive long drain materials even into places where the height of a mandrel used is limited by using a mandrel consisting of plural pipes slidably assembled, each of which can be extended and integrally fixed. CONSTITUTION:Under a double tube condition that an outer tube 7 constituting a mandrel is retracted and fitted on the outside of an inner tube 6, a driving frame 4 is lowered, a driving frame 6 is raised, and only the inner tube 6 is pulled up by leaving the outer tube 7 under the ground G. Where the pin holes 6a and 7a of them coincide with each other, a fixing pin 17 is penetrated to fix the inner and outer tubes 6 and 7 integrally, and under the condition, they are penetrated to a given depth. When the inner and outer tubes 6 and 7 are pulled up from the ground G, the anchor plate 15 is left behind under the resistance of the ground G, and drain material D is set there. The long drain material D can thus be driven even into places where the height is limited.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention + relates to a mandrel structure for driving drain materials such as T-paper drains and chemical drains into soft ground using a mandrel, and a driving method using the mandrel.

When driving drain material into the ground using a mandrel,
Generally, a mandrel with a length corresponding to the driving depth is required. However, in places where there are obstacles on the ground below the high-voltage line and the height of the mandrel is limited, the length of the mandrel required for the driving depth cannot be secured, and the driving method using a mandrel cannot be adopted. The reality is that there was no such thing.

In addition, the drain material driving device is especially suitable for soft ground +r.

Since the device is installed in a large area, there were problems such as the installation of a long mandrel with a high center of gravity would make the entire device unstable, creating the risk of it falling over.

The present invention was made to solve the problems in view of the above-mentioned circumstances, and its first purpose is to keep the height of the driving tower low by shortening the length of the mandrel, and to increase the height of the driving tower. Not only is it possible to cast lane materials (freely even in places with restrictions), it is also possible to cast lane materials to a depth of 1 minute despite the short mandrel.
A mandrel and a method for inserting a drain key 1 using the mandrel, which stabilizes the driving device by lowering the center of gravity of the mandrel and the driving phase as much as possible, and allows a drain key 1 to be inserted safely even from small heavy machinery or ships. is to provide.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a driving machine main body, and a driving ladder 2 is erected at the front of the main body. A leader is installed on the curved surface of the driving turret 2, and a driving frame 11 is attached to this to be able to slide up and down.5a
is a hanging wire, and the hanging wire is turned around the lane provided in the L entry frame l, /I, and its tip is connected to the upper end of the above (J Komi Yagura 2). The driving frame 11 is driven by an appropriate winding device (not shown) installed on the pressing-in Isogiki 1. In addition, 51) is a press-fitting wire. The hook is sequentially rotated through another lane provided on the frame 1, 4 and a sheave provided on the fixed frame 1G, which will be described later, and its tip is connected to the fixed frame 16. - The driving frame 1 is forcibly driven down by a hoisting device or the like.

The upper end of the inner tube 6 is cut out in the driving frame 4, and an outer tube 7 is slidably inserted outside the inner tube 6.

As is clear from FIGS. 2 and 3, the inside of the inner tube 6 is divided into passage portions 9 and 10 by a partition plate 8.
A drain material I) is inserted into the passage part 9, and a length I'll for the outer tube is inserted into the passage part 10. The lower end of the rod 11 passes through the guide provided at the lower end of the inner tube 6 and is attached to the F end of the outer tube 7, and a wire is attached to the upper end. 1.1a is connected and can be pulled to one side.

Furthermore, since the rod 11 is arranged eccentrically from the center of the inner tube 6 and the outer tube 7, the outer tube 7 is prevented from twisting relative to the inner tube 6. As is clear from Fig. 1, the drain hole inserted into the hole 9 is
It is fed out from a drum 13 installed on the driving frame 4, and its lower end is connected to an anchor plate 15. This anchor plate 15 is brought into contact with the lower end surface of a mandrel tip 14 attached to the lower end of the outer tube 7 (f=1). In FIG. 1, ]6 is a frame for fixing the lower end of the mandrel, and as is clear from FIG. 2, a pin hole 6a is bored in the lower end of the inner tube 6. On the other hand, a pin hole 7a is also drilled at the two ends of the outer tube 7, and the inner tube 6 and the outer tube 7 are stretched out so that the pin holes 6a and 7a coincide with each other. As shown by the imaginary lines in the figure, the inner tube 6 and the outer tube 7 are integrally fixed by inserting a fixing pin j7.

Next, we will explain one method of driving the drain (.4) using the mandrel mentioned above.

First, as shown in FIG. 4(A), the driving frame 4 is driven downward in the double tube state in which the outer tube 7 is retracted and inserted outside the inner tube 6. Press fit into the ground fiG as shown in . Next, drive the driving frame 6 in two rows, and drive the inner tube 6 while leaving the outer tube 7 in the ground.
When the pin holes 6L7a are aligned, the fixing pin 17 is inserted to integrally fix the inner tube 6 and the outer tube 7 (see FIG. 4C).

Next, the driving frame 1 is driven downward again, and the inner tube 6 and outer tube 7 are pressed into the ground as one long mandrel, as shown in Fig. 11(I)). Press fit to the specified depth.

When the press-fitting of the mandrel is completed, the driving frame 4 is driven upward again to raise the inner tube 6 and the outer tube 7 to -48° from the ground G. At this time, the anchor plate 15, which was in contact with the lower end surface of the mandrel tip 1.・'4
It is left in the ground G while being pulled out from the tip.

As shown in Fig. 11(E), pull the inner pipe 6 completely out of the ground G, then pull the outer pipe 7 up to the point where the fixing pin 17 can be removed. Remove 7. Next, the writing frame/1 is fixed in the upper position! 7! Then, when the rod 11 is pulled in the negative direction as shown by the arrow in FIG. It is raised to one side and pulled out from the ground to the state shown in Figure 4 (F), and the train key is raised to the ground G.
The old one was installed inside, and it was cut to complete the work.

-1. In the embodiment described above, the mandrel is composed of two tubes, an inner tube and an outer tube. However, the present invention is not limited to this. The stretching order may be such that the outer tube side is not only extended downward as in the embodiment described in section 2, but also the inner tube side may be press-fitted while being extended to the lower blade. In addition, the fixing bottle] 7 may be inserted by hand or may be actuated by oil 1=E, etc. Furthermore, the fixing means described in 1- is limited to the above-mentioned fixing pin 17. Instead, an appropriate locking mechanism may be adopted. Note that the outer tube side and the extraction rod 11 may be made of wire.

Furthermore, in the above embodiment, as shown in FIG. 4(E), the outer tube 7 is pulled up by the rod 11, but the pin 1
After removing 7, you may lower the drive 7 and 4 to F, fit the inner tube 6 into the outer tube 7, and then pull it together.

As described above, the present invention divides the mandrel for driving the drain phase into a plurality of tubes and configures them into a multi-tube state that allows them to slide on each other, so that they can be used in the aboveground part. By installing shortened multi-pipe pipes and press-fitting them into the ground while sliding and stretching them, the drain material can be inserted far deeper than the length of the mandrel set up in two parts of the ground. Not only is it extremely easy to drive, but it is also possible to drive long trains even in places with height restrictions, the height of the leader and drive can be kept low, and the stability of the entire device is improved. In addition, this driving device can be used as a base machine to drive drain material into the seabed using small heavy machinery such as a hydraulic excavator or full dozer, or a small boat. It has a certain effect.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the drain material oldening device according to the present invention, (A) is a front view thereof, (B) is a side view, and Fig. 2 is an enlarged view with a part of the mandrel cut away. A vertical cross-sectional view, t53, is a cross-sectional view along the line 11b-III in FIG. 1 ・'' (Ikubongi, 2... Drive-in, 3... League-14, Drive-in frame, 5L1... Hanging wire, 5
1] Press-fit Jl wire, 6. Inner tube, 6a. Pin hole, 7. Outer tube, '7a. Pin hole, 8. Partition plate, 9
, 10... Passage part, ]1... Rod, l]a... Wire, ]2... Guide, 13... Tram, ]4... Mandrel tip 1 part, 15... Anchor plate, 1G
...Fixed frame, 17...Pin for friend, I)...Train removal, G...Ground. No. 1 Applicant: Tokyu Construction Co., Ltd. 59 Figure 1 (A) (B) Figure 2 Procedural Amendment (Method) November M, 1980 Mr. Kazuo Wakasugi, Commissioner of the Patent Office 1, Indication of Case 1988 Patent application fi5125784
No. 2, Title of the invention Mandrel for driving drain material and driving method using the same 3. Person making the amendment (Relationship with 71 Special N' + Applicant address 16-14 Shibuya-chome, Shibuya-ku, Tokyo Name Tokyu Construction Co., Ltd. 4, Agent

Claims (2)

[Claims] (1) A mandrel for driving a drain material, characterized in that a plurality of tube bodies are formed into a multi-tube state that can slide on each other, and each tube body is sequentially stretched and fixed integrally. (2) A mandrel consisting of multiple tubes is press-fitted into the ground in the form of multiple tubes, the inner tube is pulled out from the outer tube, both tubes are stretched and fixed together, and then press-fitted again. The drain material is pressed into the ground at a predetermined depth by repeating these stretching, fixing, and re-pressing operations as necessary, and then the mandrel is moved to a predetermined length while leaving the second drain material in the ground. A method for driving a drain hole, the method comprising: pulling it out, releasing the above-mentioned fixation, placing the outer tube in an externally inserted state, and then pulling it out and driving a drain material.