JPH1136283A - Casting method and casting jig for steel sheet pile - Google Patents

Abstract

(57) [Summary] [Problem] To be able to sequentially drive steel pipe sheet piles, to have a good installation accuracy, and to suppress noise. SOLUTION: A joint pipe 1 is provided on a top end of a steel pipe sheet pile 1 already installed.
The connecting temporary pile 10 having 2 is fitted with the rib 15. The steel pipe sheet pile 1 and the connecting plate 14 are fixed with the vice 17 from the window 14a of the connecting plate 14 fixed to the connecting temporary pile 10, and the connecting temporary pile 1 is fixed.
0 is located on the extension of the joint pipe 3 of the steel sheet pile 1. The following steel pipe sheet pile 1 is attached to the joint pipe 12 of the temporary pile 10 for connection.
Of the steel pipe sheet piles 1 and connected to the temporary pile 10 for connection. The temporary pile 10 for connection is removed, and the next steel pipe sheet pile 1 is further driven in, thereby driving the steel pipe sheet pile 1 to the first driving position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a jig for driving a steel sheet pile used as, for example, an earth retaining wall.

[0002]

2. Description of the Related Art Conventionally, there has been known a steel pipe sheet pile construction method in which steel pipe sheet piles are connected to each other via a joint to form a retaining wall or a water blocking wall. When driving steel pipe sheet piles on land, the construction cost of piers is enormous, so piers are not usually used. FIGS. 11 to 13 show a method of driving a steel sheet pile on land in such a case.
This will be described below. A tubular joint pipe 3 having, for example, slits on both sides of the mother pipe 2 is connected to the steel pipe sheet pile 1 forming the lower pile along the longitudinal direction of the mother pipe 2. The joint pipe 3 is shorter than the mother pipe 2, and the joint pipe 3 is generally not provided at a lower (tip) side portion of the mother pipe 2 in order to reduce the driving resistance at the time of final driving. It is.

[0003] First, while connecting the joint pipes 3 of the adjacent steel pipe sheet piles 1, the steel pipe sheet piles 1 are sequentially driven at a high stop with a hammer 4 (see FIG. 11). Here, when the length of the lower portion of the steel pipe sheet pile 1 without the joint pipe 3 is L1, and the height at which the steel pipe sheet pile 1 stops at a high level (the distance from the upper end 1a of the steel pipe sheet pile 1 to the ground) is L2. It is assumed that L1 <L2.
Otherwise, the lower end of the joint pipe 3 of the next steel pipe sheet pile 1 cannot be engaged with the upper end of the joint pipe 3 of the steel pipe sheet pile 1 that has been stopped at a high level, and the driving accuracy of the steel pipe sheet pile 1 is significantly reduced. It is because it will be. The lower pile of each steel pipe sheet pile 1 driven at a high stop is alternately a leading pile 1A and a trailing pile 1
B. Next, a tubular hiring stake 5 having an engaging portion provided at the tip is fitted to the upper end 1a of the leading stake 1A, and is driven by a hammer 4 to perform final driving, so that one of the stakes which has been stopped high Every other preceding pile 1A is sequentially driven to the final driving position via the hiring pile 5 (see FIG. 12). Next, the trailing pile 1B which stops at a high level is sequentially driven by the hammer 4 and driven to the same height as the preceding pile 1A (see FIG. 13). In this way, an earth retaining wall or the like in which the steel pipe sheet piles 1 driven to the final driving position are connected to each other by the joint pipe 3 is completed.

[0004]

However, in such a driving method, since the hiring pile 5 is merely fitted over the mother pipe 2 of the steel pipe sheet pile 1, the hiring pile 5 is set when the hammer 4 is driven. 5 has a drawback that it is difficult to secure the verticality of the lower pile, which is the most important in placing the steel pipe sheet pile 1, and the installation accuracy is poor. There is also a drawback that the noise at the time of driving by the hammer 4 is very large.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a method and a jig for driving a steel pipe sheet pile, which can be installed with high accuracy and can suppress noise during driving.

[0006]

According to the present invention, there is provided a method for driving a steel pipe sheet pile according to the present invention, comprising the steps of:
A casting jig having a joint portion is detachably mounted to position the joint portion on an extension of the joint of the first steel sheet pile, and a joint of the second steel sheet pile is connected to the joint portion of the casting jig. The second steel pipe sheet pile is driven into the joint so that the joint of the second steel pipe sheet pile is connected to the joint of the first steel pipe sheet pile and can be driven. Therefore, the driving jig is used only as a guide when driving the joint portion of the second steel pipe sheet pile, and is not directly driven, so that noise due to driving can be suppressed to improve the installation accuracy, Moreover, the second steel pipe sheet pile is already connected to the joint of the first steel pipe sheet pile by driving to the position of the driving jig, and after the driving jig is removed from the first steel pipe sheet pile, the final driving position is set. Can be cast accurately. In this manner, the steel pipe sheet piles can be driven accurately in an aligned state, and the steel pipe sheet piles can be driven sequentially to the final driving position instead of every other, so that efficient driving can be performed without loss of machine movement. .

A casting jig according to the present invention is provided with a mother pipe provided at one end thereof with a fitting portion to a steel pipe sheet pile, a joint provided on a side surface of the mother pipe, and one end of the mother pipe. And a connecting portion, wherein the steel pipe sheet pile is fitted between the fitting portion and the connecting portion and attached to the steel pipe sheet pile. The fitting portion of the casting jig is fitted to the first steel pipe sheet pile whose casting has been completed and fixed with a fastening member, so that it can be arranged on an extension of the first steel pipe sheet pile, and thereafter, the second steel pipe The joint of the sheet pile is engaged with the joint of the casting jig and driven down and guided down until it is connected to the joint of the first steel pipe sheet pile, and is knocked down. After removing the casting jig, the second steel pipe is removed again. Pile the sheet pile.
Unlike hiring stakes, the casting jig is not driven. In order to fasten and fix the driving jig and the first steel pipe sheet pile, the fastening part fastens and fixes the connection part and the first steel pipe sheet pile through a window provided in the connection part.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 1 to 9. The same reference numerals are used for the same parts as those in the above-mentioned prior art, and the description is omitted. 1 is a perspective view of a temporary pile for connection used in the embodiment, FIG. 2 is a longitudinal sectional view of the temporary pile for connection, FIG. 3 is a cross-sectional view of the temporary pile for connection shown in FIG. B of connection temporary pile shown in FIG.
5 is a sectional view taken along line CC of the connecting temporary pile shown in FIG. 2, FIG. 6 is a partially enlarged sectional view of the temporary connecting pile shown in FIG. 2, and FIG. 8 (a) to 8 (g) are views showing a step of driving the steel pipe sheet pile, and FIG. 9 is a top view of the connection temporary pile and the steel pipe sheet pile. FIG. 6 is a partial cross-sectional view showing a fastening state with the above. The connecting temporary pile 10 (driving jig) shown in FIGS. 1 to 5 is a steel pipe sheet pile 1.
For example, two joint pipes 1 having different diameters are provided on both sides of a steel tubular mother pipe 11 having the same outer diameter as that of the mother pipe 2.
2, 12 are connected. Each joint pipe 12 is longer than the mother pipe 11 and is provided over the entire length in the longitudinal direction of the mother pipe 11, and one ends 12a, 12a protrude from the distal end of the mother pipe 11 to the distal end side. In addition, each joint pipe 12 is provided with a slit 13 in its longitudinal direction so that it can be engaged with and connected to the joint pipe 3 of the steel pipe sheet pile 1.

At the tip of the mother pipe 11, for example, rectangular concave grooves 11a are formed at predetermined intervals in the circumferential direction. A substantially cylindrical connecting plate 14 (connecting portion) is attached to the distal end region of the mother pipe 11 by welding or the like so as to cover the concave groove 11a. Groove 11
Window portions 14a overlapping with a are formed at predetermined intervals (see FIGS. 1 and 4). The connecting plate 14 is at a position where its leading edge protrudes from the leading end of the mother pipe 11 and is retracted from the upper end 12 a of the joint pipe 12. As shown in FIGS. 1, 2, 4 and 5, for example, a cross-shaped rib 15 is attached to the inside of the distal end of the mother pipe 11 as a fitting part. Can be fitted to the upper end 1a of the base. Therefore, the rib 15 protrudes outward from the distal end of the mother pipe 11 and extends to the distal end side from the joint pipe 12. In addition, as shown in FIG.
The step 15a is formed such that the outer diameter of the portion protruding from the front end of the first tube 1 is slightly smaller than the inner diameter of the mother pipe 11. As a result, a seating recess 16 when the upper end 1a of the steel pipe sheet pile 1 is fitted is formed between the connecting plate 14 and the rib 15 in a substantially annular shape (see FIGS. 6 and 7).

Next, a method of driving the steel sheet pile 1 using the connecting temporary pile 10 will be described. In FIG. 8, first, the first steel sheet pile 1 is driven down by a hammer 4 (not shown) to a final driving position (regular height) (FIG. 8).
(A)). Then, the connecting temporary pile 10 is attached to the upper end 1a of the steel pipe sheet pile 1 (see FIG. 8B). That is,
The rib 15 of the connecting temporary pile 10 is fitted into the upper end 1a of the steel pipe sheet pile 1 in an uneven manner, and the upper end 1a of the first steel pipe sheet pile 1 is fitted into a seating recess 16 between the rib 15 and the connecting plate 14. The upper end 1a of the steel pipe sheet pile 1 is connected to the mother pipe 11 of the connecting temporary pile 10.
(See FIG. 7). Thereby, at the upper end 1a of the steel pipe sheet pile 1, the concave groove 11 of the mother pipe 11 of the connecting temporary pile 10 is formed.
a, and overlaps the edge of the window 14a. Moreover, the joint pipe 12 of the connecting temporary pile 10 is located on an extension of the joint pipe 3 of the steel pipe sheet pile 1. In this state, as shown in FIG. 9, the window portion 14a of the connecting temporary pile 14 and the concave groove 1 of the mother pipe 11 are formed.
Insert a vise 17 into the upper end 1 of the first sheet pile 1
a and the edge of the window 14a of the connecting plate 14 are clamped and fixed. This operation is performed for each of the windows 14a. In this way, the temporary connection pile 10 is temporarily fixed to the first steel pipe sheet pile 1 substantially linearly.

Next, as shown in FIG. 8C, the joint pipe 3 of the second steel pipe sheet pile 1 is engaged with the joint pipe 12 of the connecting temporary pile 10 to be connected, and the second steel pipe sheet pile 1 is connected. Hammer 4
To the upper end position of the temporary pile 10 for connection (FIG. 8D)
reference). Thereafter, the vice 17 is removed, the connecting temporary pile 10 is removed, and the second steel pipe sheet pile 1 is driven down to the same final driving position as the first steel pipe sheet pile 1 (FIG. 8 (e),
(F)). Then, the connecting temporary pile 10 is fitted and connected to the second steel pipe sheet pile 1 (see FIG. 8 (g)), the next steel pipe sheet pile 1 is similarly driven, and this operation is repeated. Build retaining walls and the like. The connecting plate 14 of the connecting temporary pile 10
If the lower end portion 14b of the steel pipe is bent outward as shown in FIG. 10, the fitting between the steel pipe sheet pile 1 and the connecting temporary pile 10 becomes even smoother.

As described above, according to the present embodiment, the steel pipe sheet piles 1 can be continuously driven instead of every other, and can be driven directly to the final driving position without stopping at a high height. Therefore, there is no loss of machine movement such as a hammer, and efficient driving work can be performed. In addition, at the time of driving, the connecting temporary pile 10 connected to the steel pipe sheet pile 1 previously driven is used as a guide member for driving the next steel pipe sheet pile 1 together with the already installed steel pipe sheet pile 1, and is directly driven. Since it is not provided, the noise can be suppressed and the accuracy of erection can be improved as compared with the conventional hiring stake. In addition, if there are a plurality of types of diameters of the joint pipe 3 of the steel pipe sheet pile 1 depending on the construction location, the diameters of the two joint pipes 12 of the connecting temporary pile 10 are made different, so that the joint pipes 3 having different diameters can be obtained. It will be able to respond.

In the above-described embodiment, the connecting temporary stake 1
With respect to 0, two joint pipes 12 having different diameters are arranged on both sides of the mother pipe 11 at an interval of 180 degrees, but the arrangement interval of the joint pipes 12 may be arbitrary. The outer diameter of the joint pipe 12 may be the same or different between the two joint pipes. Fitting tube 1
2 can be used alternately with the same outer diameter.
Durability is improved. In addition, the joint pipe 12 of the connecting temporary pile 10
May be three or more. Further, as shown in the above-described embodiment, only one joint pipe 12 is used as a guide when the steel pipe sheet pile 1 is driven, so that only one joint pipe 12 may be attached to the mother pipe 11. The connection between the connecting temporary pile 10 and the steel pipe sheet pile 1 in the window portion 14a is not limited to the vise 17, and various fastening members such as bolts and nuts can be employed. One of the joint pipes 3 and 12 connected to each other may be a non-tubular joint shape.

[0014]

As described above, according to the method of driving a steel sheet pile according to the present invention, a driving jig having a joint is attached to and detached from the upper part of the first steel sheet pile driven in the ground. The joint part of the second steel pipe sheet pile is connected to the joint part of the driving jig and the second steel pipe sheet pile is put into place so that the joint part is positioned on the extension of the joint of the first steel pipe sheet pile. By doing so, the joint of the second steel pipe sheet pile is connected to the joint of the first steel pipe sheet pile and can be driven, so that the steel pipe sheet pile can be continuously driven in sequence and without stopping at a high height during driving. Since it is possible to drive directly to the final driving position, there is no loss of mechanical movement such as a hammer, and an efficient driving operation can be performed. In addition, at the time of driving, the driving jig connected to the first steel pipe sheet pile that was previously knocked down is used as a guide member for driving the second steel pipe sheet pile, and is not directly driven. Noise can be suppressed and the accuracy of installation can be improved. In addition, a casting jig according to the present invention includes a mother pipe provided with a fitting portion to a steel pipe sheet pile at one end, a joint provided on a side surface of the mother pipe, and a connection provided at one end of the mother pipe. And the connection jig is fitted to the steel pipe sheet pile between the fitting part and the connection part so as to be connected to the steel pipe sheet pile. Therefore, the driving jig is a guide for driving the second steel pipe sheet pile. It can be used as a member and is not directly cast. Therefore, the noise can be suppressed as compared with the conventional hiring pile, and the setting accuracy of the steel pipe sheet pile can be controlled well.

[Brief description of the drawings]

FIG. 1 is a perspective view of a connecting temporary pile used in an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a connecting temporary pile.

FIG. 3 is a sectional view taken along line AA of the temporary connection pile shown in FIG. 2;

FIG. 4 is a sectional view taken along line BB of the temporary connection pile shown in FIG. 2;

FIG. 5 is a sectional view taken along line CC of the temporary connection pile shown in FIG. 2;

FIG. 6 is a partially enlarged cross-sectional view of the connecting temporary pile shown in FIG. 2;

FIG. 7 is a partial side view showing a connection state between a connection temporary pile and an upper end of a cast steel sheet pile.

8 (a) to 8 (g) are views showing a step of driving a steel pipe sheet pile.

FIG. 9 is a partial cross-sectional view showing a fastening state between a temporary connection pile and an upper end of a steel pipe sheet pile.

FIG. 10 is a partial cross-sectional view showing another shape of the connecting temporary pile.

FIG. 11 is a view showing a conventional method of driving a steel sheet pile, and is a view showing a high-stop driving state.

FIG. 12 is a diagram showing a state in which a leading pile is driven by using a hiring pile.

FIG. 13 is a view showing a state in which a trailing pile is driven by a hammer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel sheet pile 3 Joint pipe 10 Temporary pile for connection 11 Main pipe 12 Joint pipe 14 Connection board 14a Window 170,000 force

Claims (2)

[Claims] An installation jig having a joint portion is detachably mounted on an upper portion of a first steel pipe sheet pile that has been cast, and the joint part is positioned on an extension of a joint of the first steel pipe sheet pile. By connecting the joint of the second steel pipe sheet pile to the joint part of the driving jig and driving the second steel pipe sheet pile, the joint of the second steel pipe sheet pile is changed to the joint of the first steel pipe sheet pile. A method for driving steel pipe sheet piles that can be connected and driven. 2. A mother pipe provided with a fitting part for fitting a steel pipe sheet pile at one end thereof, a joint part provided on a side surface of the mother pipe, and a connecting part provided at one end of the mother pipe. And a fitting jig which is fitted to the steel pipe sheet pile between the fitting part and the connecting part to be mounted on the steel pipe sheet pile.