JPH0720319U - Sheet pile reinforcement tool - Google Patents

Abstract

(57) [Summary] [Purpose] Steel sheet piles and H used for earth retaining in civil engineering.
A tool for facilitating the setting of a shape steel is provided. A sheet pile reinforcing tool in which a blade body of a cemented carbide tip having a sharp cutting edge is fixed to an end portion of a steel base material having an L-shaped notched engaging portion. This tool is used by engaging an L-shaped notched engaging portion with a corner portion at the lower end of a casting material such as a sheet pile and fixing it by welding or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool for facilitating the placement of steel sheet piles and H-section steel used for retaining soil in civil engineering work.

[0002]

[Prior art]

 In civil engineering works such as foundation works, subway works, and revetment works, a method of driving steel sheet piles and H-shaped steel into the ground is used to prevent the collapse of the soil. This construction method was done by driving steel sheet pile or H-shaped steel as it is with a striking device such as a vibration hammer.

However, in the above-mentioned conventional construction method, when the ground is a soft sandy mud layer, etc., it was possible to drive easily, but in the case of a cobblestone layer or a gravel layer, the tip of the steel sheet pile is a cobblestone. It collided and deformed, making it difficult to place. Therefore, in the stratum with such hard obstacles, the obstacles are removed in advance by using an auger or the like to remove the obstacles, and steel sheet piles or the like are placed, or in the case of the ground where the steel plate is difficult to stand on its own, After excavating the ground with an auger etc. to remove obstacles, ordinary soil was put in the part and steel sheet pile was placed. For this reason, it was uneconomical because the cost for introducing the auger, the cost for inputting ordinary soil and extra time were required.

[0004]

[Problems to be solved by the device]

 Therefore, the present invention provides a tool that solves the problems of the above-mentioned conventional steel plate driving methods and enables relatively easy driving of steel plates even on the ground with boulders, gravel, etc. It is an issue.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention adopts the following configuration. That is, the sheet pile reinforcing tool according to the present invention is a tool that is attached to a sheet pile or the like and is placed in the ground, and is attached to the lower end portion of a steel base material having an L-shaped notched engaging portion. It consists of a cemented carbide blade with a pointed tip.

[0006]

[Action]

 This tool is used by engaging an L-shaped notched engaging portion with a corner portion at the lower end of a casting material such as a sheet pile and fixing it by welding or the like. Since the engaging portion is L-shaped, it can be used in a wide range even if the thickness of the sheet pile is different. Also, since it is fixed to the lower end of the sheet pile, which is most likely to be deformed, the base material acts as a reinforcing rib that prevents the sheet pile from being deformed or damaged.

[0007]

【Example】

 Hereinafter, the present invention will be specifically described with reference to the drawings illustrating an embodiment. 1 and 2 show an embodiment of the present invention. This sheet pile reinforcing tool 1 is formed by fixing a sharp blade body 3 of a cemented carbide chip to a lower end portion of a base material 2 made of steel. . The base material 2 is formed with an L-shaped notch-shaped engaging portion 5 from the upper end portion to the intermediate portion. The blade body 3 of the cemented carbide tip is brazed in a state in which it is fitted in the groove 6 in the width direction formed at the tip of the base material. Since the width of the blade body 3 is slightly wider than the width of the base material, both ends slightly project from the base material (t is 1 to 2 mm).

The width w of the engaging portion 5 formed on the base material 2 is larger than 1/2 of the width W of the base material, and preferably w / W = 2/3. The tip angle α of the blade 3 is preferably about 120 to 140 degrees. Since this tool is usually buried in the ground together with the sheet pile, the blade thickness d of 10 mm or less is sufficient, and the material of the cemented carbide tip may be inexpensive.

Next, a method of using the reinforcing tool 1 will be described. This tool 1 is used by being fixedly attached to the lower end of a sheet pile that is usually used for civil engineering work. 3 and 4 show an example in which this reinforcing tool is attached to a Larzen type steel sheet pile 10. As shown in Fig. 5, the reinforcing tool can be attached to the sheet pile by applying the engaging portion 5 of the base material 2 to the corner portion of the sheet pile, welding, bolting, or other suitable fixing method (illustrated example). Then weld it). Since this sheet pile is normally left as it is embedded in the ground, the number of the reinforcing tools 1 attached to one sheet pile need not be so large. When the thickness of the sheet pile is large, it is effective to mount them in a zigzag manner so that the engaging portions 5 of the base material are alternately located on the inner surface side and the outer surface side of the sheet pile.

The sheet pile 10 to which the reinforcing tool 1 is attached stands on the ground with the end portion (lower end portion) on which the blade body 3 made of cemented carbide is placed downward, and the upper end portion is a vibration hammer. Hit with a hitting device such as. By this impact, the sheet pile 10 is driven into the ground. Since the reinforcing tool having the blade body 3 of the cemented carbide tip is attached to the lower end portion of the sheet pile 10, it is possible to efficiently place even a stratum having a hard obstacle such as a cobblestone layer and a gravel layer. Further, since the base material 2 of the reinforcing tool functions as a reinforcing rib for the sheet pile, deformation of the sheet pile is less likely to occur.

[0011]

【The invention's effect】

 As explained above, the reinforcing tool according to the present invention is used by being attached to the end of a sheet pile driven into the ground, and has a sharp hard blade integrally provided at the tip. Therefore, it is easy to drive the sheet pile, and it can be driven efficiently even on the ground with obstacles such as boulders and gravel. Further, since the steel base material of the fixed reinforcing tool functions as a reinforcing rib of the sheet pile, deformation of the sheet pile is less likely to occur. In the above embodiment, the steel sheet pile was described as an example, but the same applies to the case of steel materials having other shapes, for example, H-section steel.

[Brief description of drawings]

FIG. 1 is a front view of a reinforcing tool.

FIG. 2 is a side view thereof.

FIG. 3 is a front view of a state where the sheet is attached to a sheet pile.

FIG. 4 is a bottom view thereof.

FIG. 5 is an explanatory diagram of an attachment method.

[Explanation of symbols]

 1 Reinforcing Tool 2 Base Material 3 Blade 5 Engagement Part 10 Sheet Pile

Claims (1)

[Scope of utility model registration request] 1. A tool which is attached to a sheet pile or the like and placed in the ground, wherein a cemented carbide tip having a sharp cutting edge at a lower end portion of a steel base material having an L-shaped notched engaging portion. A sheet pile reinforcing tool with the blade body fixed.