JPH0995938A - Master pile lateral sheet pile and its execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent back earth from flowing out by unitedly mutually connecting an upper and a lower lateral sheet pile with a plurality of steel bars to remove a gap between the upper and the lower lateral sheet pile. SOLUTION: A lateral sheet pile 6 is inserted between master piles 5, 5 formed of precast concrete together with processing of front earth. Anchors 9 are deeply buriedly provided in back earth 4 on a plurality of stages, and a fixed part 9a is solidly fixed with fixing nuts 9a on the side of the front earth 2 of the master pile 5. In addition, through holes 5a where the anchors are inserted through are formed at fixed intervals in the master pile 5. Abutting parts between the upper and the lower lateral sheet pile 6, 6 are further mutually connected through couplers 8. Thus the upper and the lower lateral sheet pile 6 are mutually unitedly connected with a steel bar 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main pile lateral sheet pile used as a mountain retaining wall for mountain retaining work and a method of constructing the same.

[0002]

2. Description of the Related Art Conventionally, as a mountain retaining wall in a mountain retaining work, for example,
As shown in FIG. 5 and FIG. 6, a plurality of parent piles 1 made of H-shaped steel, I-shaped steel or the like are driven in advance at predetermined intervals along the excavation line, and as the excavation of the front soil 2 progresses, the parent piles 1, 1 A parent pile side sheet pile construction method is generally known in which a plurality of side sheet piles 3 made of wooden planks or concrete plates are sequentially inserted between them to form a mountain stop wall.

However, in the conventional parent pile horizontal sheet pile construction method, as the excavation of the front soil 2 progresses, the number of horizontal sheet piles 3 inserted between the parent piles 1 and 1 increases. It is not easy to insert it between 1 and 1, and since it requires manual work, there is a problem that it becomes dangerous as it gets deeper.

Further, since the horizontal sheet piles 3 inserted between the main piles 1 and 1 are not particularly connected, the horizontal sheet piles 3 are not particularly connected.
There is a problem that a gap is likely to occur between the 3 and 3, and therefore not only the water blocking property is poor, but also the back soil 4 easily flows out from the gap.

Further, when a gap or a gap is generated between the horizontal sheet piles 3, 3, there is a problem that the landscape is damaged in the case of a permanent structure such as a retaining wall.

The present invention has been made to solve the above problems, and provides a main pile lateral sheet pile and a construction method thereof, which are stable in strength and have improved workability. To aim.

[0007]

A parent pile lateral sheet pile according to claim 1 of the present invention comprises a plurality of parent piles driven at a predetermined interval and a plurality of parent piles inserted in order between the parent piles. A horizontal sheet pile and a plurality of steel rods that are inserted into the horizontal sheet piles and are connected to each other and that connect the horizontal sheet piles to each other are configured.

According to the second aspect of the present invention, the parent pile lateral sheet pile is formed by driving a plurality of parent piles at a predetermined interval and connecting a plurality of lateral sheet piles to each other between the adjacent parent piles. The feature is that a plurality of sheets are inserted as one body.

[0009]

1 to 3 show an embodiment of a parent pile lateral sheet pile according to claim 1 of the present invention, in which reference numeral 5 is formed from precast concrete, The main piles are placed at predetermined intervals along the excavation line, 6 is a precast concrete plate, and a horizontal sheet pile is inserted between the adjacent main piles 5 and 5 as the front soil 2 is being excavated. 7 are respectively inserted into the horizontal sheet pile 6,
And steel rods such as PC steel rods (hereinafter referred to as "high-strength steel rods"), which are connected to each other through a coupler 8 made of long nuts or the like and connect the horizontal sheet piles 6 so as not to create a gap. Reference numeral 9 is connected to the main pile 5 as the excavation of the whole soil 2 proceeds, and the main pile 5 and the side sheet pile 6 are connected.
Is an anchor for sequentially burying deeply in the back soil 4 and fixing the main pile 5 and the cross sheet pile 6.

A through hole through which the anchor 9 is inserted in the main pile 5.
5a are formed at predetermined intervals in the vertical direction, and the main pile 5
On both left and right sides, concave portions 5b having a substantially groove-shaped cross section into which the end portions of the horizontal sheet pile 6 are inserted are formed continuously in the vertical direction.

Through holes 6a, through which the high-strength steel rods 7 are inserted, are formed at both left and right ends of the horizontal sheet pile 6, respectively. Also,
The transverse sheet pile 6 is inserted between the adjacent main piles 5 and 5 in order from the top by fitting both end portions into the concave portions 5b of the main pile 5.

The high-strength steel rods 7 are inserted into the through holes 6a of the horizontal sheet piles 6 and fixed to the upper and lower end portions of each horizontal sheet pile 6 by fixing nuts 11, and the upper and lower horizontal sheet piles 6 and 6 are butted to each other. The parts are connected to each other by a coupler 8.

The anchor 9 is buried deeply in the back soil 4 in a diagonally deep manner in a plurality of steps, and its fixing portion 9a is firmly fixed on the front soil 2 side of the main pile 5 by a fixing nut 9a or the like.

4 (a) to 4 (d) show an embodiment of a method for constructing a parent pile side sheet pile according to claim 2 of the present invention,
The following is a description in order.

(1) First, a plurality of parent piles 5 are driven deep into the ground at predetermined intervals along the excavation line.

(2) Next, the front soil 2 is excavated along the excavation line to a predetermined depth.

(3) Next, from the through hole 5a of the main pile 5 to the back soil 4
The anchor 9 is pushed deep into the inside, and the fixing nut 9a is screwed to the end portion of the anchor 9 on the whole soil 2 side so that each parent pile 5 is supported so as not to fall on the whole soil 2 side.

The anchor 9 is fixed in the back soil 4 by a fixing method which has been widely used in the past.

(4) Next, the first horizontal sheet pile 6A is hung by the crane 10 and inserted between the adjacent main piles 5, 5. In this case, if the hanging insert 6b is attached to the horizontal sheet pile 6A,
The crane 10 makes it easier to hang.

(5) Next, the high-strength steel rod 7A is inserted into the through-hole 6a of the first horizontal sheet pile 6A, and both ends of this high-strength steel rod 7A are fixed to both ends of the through-hole 6a. Fix by nut 11.

Further, a coupler 8A is attached to the upper end of the high strength steel rod 7A.

(6) Next, the through hole 6a of the second horizontal sheet pile 6B.
The high-strength steel rod 7B that is inserted in is connected through the coupler 8A.

(7) Next, insert the second-stage horizontal sheet pile 6B between the adjacent main piles 5 and 5 by fitting both ends thereof into the recesses 5b of the main pile 5 and, at the same time, inserting the high-strength steel rod 7B. The through hole of the second horizontal sheet pile 6B
Insert it through 6a and stack it on top of the horizontal sheet pile 6A on the first stage.

In this case, if a guide plug is formed on the abutting surfaces of the horizontal sheet pile 6A and the horizontal sheet pile 6B so as to be fitted to each other, the horizontal sheet pile 6A and the horizontal sheet pile 6B can be surely superposed without displacement. You can

(8) Next, by fixing the upper end portion of the high strength steel rod 7B with the fixing nut 11, the horizontal sheet pile of the first stage is fixed.
6A and the second-stage horizontal sheet pile 6B are integrally connected so as not to create a gap.

(9) Further, a coupler 8B is attached to the upper end of the high strength steel rod 7B.

(10) Next, the whole surface soil 2 is further dug down to a predetermined depth.

(11) Next, from the through hole 5a of the main pile 5 to the back soil 4
Push the second-stage anchor 9 deeply inside, and screw the fixing nut 9a to the end of the anchor 9 on the whole soil 2 side so that each parent pile 5 does not fall to the whole soil 2 side. To support.

(12) Next, the horizontal sheet pile 6A and the horizontal sheet pile 6B are integrally inserted into the main piles 5, 5.

Thereafter, in the same manner, by repeating the work of (3) to (12), a plurality of lateral sheet piles 6 are inserted between the adjacent main piles 5 and 5 to form a mountain stop wall having a required depth. Configure.

[0031]

The parent pile lateral sheet pile according to the first aspect of the present invention, which has the above-described configuration, has a plurality of parent piles driven at predetermined intervals and is sequentially inserted between the parent piles. And a plurality of horizontal sheet piles, and each of which is inserted into the horizontal sheet pile, and is connected to each other, and is configured with a plurality of steel rods that connect the horizontal sheet piles, in particular, the upper and lower horizontal sheet piles are a plurality. Since it is integrally connected by the steel rod of
The strength is extremely stable, and since there is no gap between the upper and lower horizontal sheet piles, the back soil can be prevented from flowing out, and the design is excellent.

According to a second aspect of the present invention, the parent pile lateral sheet pile has a plurality of lateral sheet piles, particularly between adjacent parent piles.
While connecting with each other, insert multiple sheets as one,
It has the effects of improving construction efficiency and ensuring safe construction.

[Brief description of drawings]

FIG. 1 (a) is a partial front view of an embodiment of a parent pile lateral sheet pile according to claim 1 of the present invention, and FIG. 1 (b) is a partially enlarged view thereof.

FIG. 2 is a longitudinal sectional view of FIG.

3 is a cross-sectional view of FIG.

4 (a) to 4 (d) are partial front views showing an embodiment of a method for constructing a parent pile horizontal sheet pile according to claim 2 of the present invention.

FIG. 5 is a vertical cross-sectional view showing an example of a conventional parent pile horizontal sheet pile.

FIG. 6 is a cross-sectional view of FIG.

[Explanation of symbols]

1 ... Parent pile, 2 ... Front soil, 3 ... Side sheet pile, 4 ... Back soil, 5 ...
Main pile, 6 ... Horizontal sheet pile, 7 ... High-strength steel rod (steel rod), 8 ... Coupler, 9 ... Anchor, 9a ... Fixing nut, 10 ... Crane,
11 ... Fixing nut.

Claims (2)

[Claims] 1. A plurality of parent piles driven at a predetermined interval, a plurality of horizontal sheet piles sequentially inserted between the parent piles, and inserted into the horizontal sheet piles, and connected to each other,
A parent pile lateral sheet pile, comprising a plurality of steel rods connecting the lateral sheet piles. 2. A parent pile, wherein a plurality of parent piles are driven at a predetermined interval, and a plurality of horizontal sheet piles are connected to each other between the adjacent parent piles, and the plurality of parent piles are integrally inserted. Construction method of horizontal sheet pile.