JPH11315532A - Driving equipment for drainage material and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation of an anchor plate equipped with a drainage material when the drainage material is driven in a hard ground by widening the front end of a mandrel so as to come into close contact with the V-shaped inside face of an anchor plate holding a fixing plate of the drainage material at the intermediate position of the height direction. SOLUTION: This driving equipment is constituted of an anchor plate 3 provided with a V-shaped sectional shape and a fixing member 4 at the intermediate position in the height direction and a mandrel 1 obliquely cut so as to bring the widened front end into close contact with the V-shaped inside face of the anchor plate 3. When a drainage material 2 is driven, the end of the drainage material 2 set in the mandrel 1 is fixed to the fixing member 4 of the anchor plate 3 and then, the front end 7 of the mandrel 1 is brought into close contact with the V-shaped inside face of the anchor plate 3 to insert the mandrel 1 into a specified depth of the ground 6. Only the mandrel 1 is pulled out of the ground but the anchor plate 3 is left in the ground as the front end of the drainage material 2 is fixed and hence, it functions as an anchor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain material driving device capable of driving a drain material mainly through hard ground mixed with gravel and the like, and a method of using the same.

[0002]

2. Description of the Related Art Conventionally, in order to prevent a liquefaction phenomenon of a soft ground from driving a drain material into the ground, for example, as shown in FIG. 9, a drain material 2 is set in a mandrel 1; With a flat anchor plate 3 made of steel or the like attached to the tip of the drain material 2, the mandrel 1
10 is driven into the ground 6 to a predetermined depth by a driving machine 5 as shown in FIG.
Together with the ground 6.

[0003] However, when the ground 6 into which the drain material 2 is driven is a hard ground containing gravel or the like, the flat anchor plate 3 is deformed by the driving of the mandrel 1, and when the mandrel 1 is pulled out, the anchor is pulled out. There is a possibility that the plate 3 may be lifted up together with the mandrel 1, so that the drain material 2 cannot function as an anchor.

[0004]

SUMMARY OF THE INVENTION According to the present invention, when a mandrel is used to drive a drain material into hard ground containing gravel or the like, the anchor plate to which the drain material is attached is not deformed and the mandrel is pulled out. Provided is an apparatus and a method for driving a drain material in which an anchor plate sometimes functions sufficiently as an anchor to drive the drain material to a predetermined depth in the ground.

[0005]

An apparatus for driving a drain material according to the present invention has an anchor plate having a V-shaped cross section and holding a drain material fixing member at a middle position in the height direction. And a mandrel having an enlarged diameter of the distal end portion, and the enlarged distal end portion obliquely cut so as to be in close contact with the V-shaped inner surface of the anchor plate. After fixing the end of the drain material to the fixing member of the anchor plate of the device, penetrate the mandrel into the ground to a predetermined depth while keeping the tip of the mandrel in close contact with the V-shaped inner surface of the anchor plate, and only the mandrel The method comprises a method of using a drain material placing device for pulling out.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a drain material driving device according to an embodiment of the present invention; FIG. A-
As shown in FIG. 2, which is a front view of the left half section in the A direction,
This driving device has a V-shaped cross-sectional shape, an anchor plate 3 having a fixing member 4 for the drain material 2 at a middle position in the height direction, and a diameter of a distal end portion is enlarged as shown in the drawing. Further, the mandrel 1 is formed by diagonally cutting the enlarged end portion 7 so as to be in close contact with the V-shaped inner surface of the anchor plate 3.

The details of the anchor plate 3 are shown in FIG.
FIG. 4 is a side view of FIG. 3, FIG. 4 is a plan view in the BB direction of FIG. 3, and FIG. 5 is a front view in the CC direction of FIG.
A flat member is provided at the tip of the V-shaped cross section, and a fixing member 4 for attaching the tip of the drain material 2 is provided inside the V-shape.
The tip of the is attached.

Next, the mandrel 1 whose tip 7 is obliquely cut so as to be in close contact with the V-shaped inner surface of the anchor plate 3 is a side view of the left half section of FIG.
It is formed as shown in FIG. 7 in the front view of the left half cross section shown in the D direction, and is obtained by cutting the lower end of the cylindrical shape so as to be inclined in a V-shape from both sides, and the diameter of the tip 7 is enlarged. Therefore, the inclined surface of the distal end portion 7 of the mandrel 1 and the V-shaped arc-shaped inner surface of the anchor plate 3 are in close contact with a wide contact surface.

In view of the above, the drain material 2 having the above structure
When placing the drain material 2 using the placing device of
After fixing the end of the drain material 2 set as shown in FIG. 8 in the mandrel 1 attached to the setting machine 5 as shown in FIG. 10 to the fixing member 4 of the anchor plate 3,
1 is brought into close contact with the V-shaped inner surface of the anchor plate 3 with the tip 7 of the mandrel 1.

In this state, the mandrel 1 is penetrated into the ground 6 by a driving machine 5 as shown in FIG. 10 to a predetermined depth, and only the mandrel 1 is pulled out of the ground 6, so that the anchor plate 3 becomes the drain material 2 Is left at a predetermined depth in the ground 6 while the tip of the base is fixed, and functions as an anchor.

[0011]

According to the above-described apparatus for driving a drain material and the method of using the same according to the present invention, when the mandrel penetrates into the ground, the diameter of the tip of the mandrel is enlarged and the tip is anchored. The plate is cut obliquely so as to be in close contact with the inner surface of the V-shape of the plate to increase the contact area, so that the anchor plate and the mandrel are in close contact with a wide contact area. Can penetrate to depth.

Further, when the mandrel is pulled up, the anchor plate can obtain a predetermined resistance in the ground, so that the anchor plate can sufficiently function as an anchor in the ground. For example, it can function effectively when driving a drain material through hard ground containing gravel or the like.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a left half section in an embodiment of a drain material driving device of the present invention.

FIG. 2 is a front view of a left half section in the AA direction of FIG. 1;

FIG. 3 is a side view of the anchor plate of FIG. 1;

FIG. 4 is a plan view in the direction BB of FIG. 3;

FIG. 5 is a front view in the CC direction of FIG. 4;

FIG. 6 is a side view of a main part of a left half section of the mandrel of FIG. 1;

FIG. 7 is a front view of a left half section in the DD direction of FIG. 6;

FIG. 8 is a side view of a main part of a mandrel for explanation when driving a drain material using the driving device of FIG. 1;

FIG. 9 is a side view of a main part showing a conventional mandrel and an anchor plate.

FIG. 10 is a side view showing an example of a driving machine used when a mandrel penetrates into the ground.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mandrel 2 Drain material 3 Anchor plate 4 Fixing member 7 Tip

Claims (2)

[Claims] 1. An anchor plate having a V-shaped cross-section and holding a fixing member of a drain material at a middle position in a height direction thereof, a diameter of a front end portion being enlarged, and the enlarged front end portion And a mandrel cut obliquely so as to be in close contact with the V-shaped inner surface of the anchor plate. 2. After the end of the drain material is held by the fixing member, the mandrel penetrates into the ground to a predetermined depth with the tip of the mandrel being in close contact with the V-shaped inner surface of the anchor plate. 2. The method for using a drain material setting device according to claim 1, wherein the device is pulled out.