JPS6065817A - Steel material for landslide protection wall - Google Patents

Abstract

PURPOSE:To construct a landslide protection wall having high resistance strength by providing joint sections at both ends of a wide flange consisting of H-beam with sides of unequal length while forming a plurality of through-holes in the longitudinal direction of a web and fitting ribs extending over the whole length in the longitudinal direction of the wide flange. CONSTITUTION:Wide flanges 1 and narrow flanges 2 are formed at both ends of webs 3 consisting of steel materials 9 while joint sections 4 for connection are fitted at both ends of the flanges 1, and a plurality of through-holes 14 are formed along the longitudinal direction of the webs 3. Ribs 16 having approximately U-shaped sections are shaped extending over the whole length in the longitudinal direction of the flanges 1. When building a landslide protection wall, the post row of soil cement posts 11, etc. is formed in ground 10, and the steel materials 9 are inserted before the post row is not cured, while the steel materials 9 are connected mutually through the joint sections 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates to a shrine for a mountain retaining wall used for constructing a mountain corner wall in the ground.

[Background technology]

Conventionally, a steel material with connecting joints (4) provided at both ends of a groove steel (6) with a cross-sectional opening as shown in Fig. 1 was used to form a mountain-cornered wall, or as shown in Fig. 2. Equilateral H-shaped steel (
6) Connecting joints 113+4 at both ends of the valley flange (7)
It is natural to form a retaining wall using steel Io equipped with 1: ↓
1 has been given. Those using equilateral H-beam steel (6) are grooved]
(5) The rigidity in terms of unit weight ratio is greater than that using H-shaped steel (5), and it is economical because it is possible to use thick steel to obtain the necessary rigidity, but on the other hand, this equilateral H-shaped steel ( 6) If the retaining wall has a non-1F line in cross section or has a corner, when forming these walls, a 1 yen stand is used as shown in Figure 3. Arm/side H'
J! The flanges (7) of the steel (6) become tangled and cannot be brought into contact with each other. Therefore, it is difficult to prevent the flange (7) of the steel (6) from coming into contact with each other. Angle r,
4Q I had a problem where I couldn't get the 1 form 0.:t
7'A % Lay out side 11 type steel (6) horizontally in the ground and make a pile 1)'1 wall. ′, if the web (8) of each phase cuts the ground, ``) construction i8
) ++ bonding force of earth 1'tiF on il side, or t, i
(There was a problem in that the resultant force h'j of JflI Δself 1I and Earth Jiλ could not be sufficiently obtained.

[Distortion 11: ilJ eye u<JJ The present invention was made in view of the above points, and its purpose is to have strong strength, be economical, and have a non-linear shape. ] - Not only can it be easily constructed even if it is a mountain retaining wall with a capital, but it also has a high bonding force with the ground, and in order to increase the bonding force with the ground, it is possible to make through holes in the steel material. It is an object of the present invention to provide a steel material for mountain retaining walls that is excellent in terms of ceiling use and does not have a decrease in buckling strength.

[Disclosure of the invention]

In the steel material for retaining walls according to the present invention, in the scalene H-beam steel having a medium wide flange and a 11J narrow flange at both ends of the web, there is a wall for connecting the steel members at both ends of the Ip wide flange. A connecting joint part is formed, a plurality of through holes are formed in the sea urchin lining along the longitudinal direction, and a web with a U-shaped cross section extending over the entire length in the longitudinal direction is formed in the medium wide flange. A structure is disclosed that prevents a decrease in buckling strength due to the provision of holes.

The present invention will be explained in detail below based on examples. The steel material (9) used in the present invention has the following configuration.That is, the conventional III II: I H-type steel has one of its flanges extended to both sides, and the longer one has 1≦(8). This is the flange (1). Therefore, the extensions (+l is longer in width than the shorter flange (2). 8) The tip is further provided with a flat part (4) having a C-shaped cross section or a hook shape. In Fig. 5, A = 400 a
mXB=600mm XB' = 200 m, t+
"" 4.5 mm, t2=6mm, ta-18mm
However, it goes without saying that it is not necessarily limited to the above-mentioned Maki value. The web (3) has the following information as shown in FIG.
As shown, trapezoidal through holes (14) whose negative side coincides with the joining part with the wide flange +1+ are provided in a constant quadrupling of 1-4 with l[] in the longitudinal direction. Of course, the position and shape of the through hole (14) are not limited to this, and various shapes such as those shown in FIG. 8 ta+tb+ can be applied. The mountain retainer η is constructed using steel materials with the above-mentioned configuration, and as shown in Fig. 7, first, the ground It
(11 includes soil cement columns and soil bentonite columns (l
(In some cases, the walls are formed by simply disturbing the earth and sand.) When the soil cement columns, soil bentonite columns, etc. are unhardened, the steel material (9) is pushed in and the next step is carried out. Push in the steel material (9) while using the connecting joint part (4) as a kite to connect the adjacent steel material (9).
They are connected with the connecting joint part (4), and in the same way, @Ki' I91 are connected one after another with the connecting joint part (4). A soil cement wall, a soil bentonite wall, or a disturbed earth and sand wall (1'4, that is, a retaining wall) is formed using the steel material (9) as a core material.Here, the steel material (9) becomes a stress member of the retaining wall and connects it. It serves as a water stop member by connecting with the joint part (4), and when installing the steel members (9), each steel member (9)
) uncured wall material, i.e., soil cement, soil bentonite, or disturbed earth, enters the through hole (I4) provided in the sea urchin (3), and the wall 414 material on both sides of the sea urchin (3) becomes transparent. This increases the bonding strength between the steel material and the wall material by bonding through the holes. By the way, if a plurality of through holes 04) are formed along the longitudinal direction of the sea urchin (3) in this way, there is a concern that the buckling strength of the Ukuri 1 Kiri (9) itself will decrease, In January, as shown in Figures 5 and 0, the middle wide flan above the joint with the web (3);
) has a roughly U-shaped cross section extending over the entire length in the longitudinal direction (
I6) is provided, and this lip (16) connects the steel material (9
) The buckling strength in the longitudinal direction is controlled to compensate for the decrease in LTL buckling strength due to the provision of the through hole (14). The position of this lip (16) is not limited to the above-mentioned position, but can be placed on the medium wide flange (1) as necessary.
is formed at any position between the two ends of .

[Effect of Departure J]

As described above, in the present invention, since one flange is wider than the other flange, the target mountain (
Even if the wall has a non-contact shape or the part is closed, as shown in Figure 7, the flanges on the middle side of the steel members that match each other will not meet each other. 4; JlP and copper phases can be connected horizontally with medium-wide flanges without causing a By constructing them continuously so that they are connected to each other, the copper phase made of highly rigid H-shaped copper becomes the core material of soil cement walls, soil bentonite walls, disturbed earth and sand walls, etc., making it even more durable. A mountain retaining wall with excellent strength and water-stopping properties can be formed.In addition, in the present invention, a plurality of through holes are formed along the longitudinal direction in the paulownia web. Therefore, when building the copper phase, the wall material in the ground enters the hole and the walls 4:A on both sides of the web can be bonded through the hole, resulting in the bonding of the wall material forming the ground and itself. It increases the strength and bonding strength with this wall material and the strength of the wall material, making it possible to use a high-strength mountain (Y7Uu).Moreover, the medium wide flange has a section an m3 U that spans the entire length in the longitudinal direction. Since the letter-shaped nozzle is formed, this lip increases the buckling strength of the copper phase, compensates for the decrease in strength due to the provision of through holes, and provides sufficient buckling strength for practical use. It has the advantage of being able to

[Brief explanation of drawings]

FIG. 1 is a sectional view of the conventional example, and FIG. 2 is a sectional view of another conventional example. The first convex view is of the conventional example shown in FIG. ft.
m in the example that cannot be connected with 5? , I-! Fig. 14 and Fig. 4 show an embodiment of the present invention.
Figure 0 is a front view of Y in Figure 4, (]) is a medium wide flange, +211d is a Nakamatsu flange, (3) is a web, (9) is a <tl'l 4'A
' % (It's from (16) t.

Claims (1)

[Claims] il) A 44-sided H-shaped steel with a medium-wide flange and an intermediate flange on both sides of the web (νW), and the connecting joint group for connecting adjacent scalene H-shaped steels is largely medium-wide. At both ends of the flange, a plurality of through holes are provided along the longitudinal direction of the sea urchin (R1), and a roughly U-shaped nozzle is formed at the appropriate location of the IIJ wide flange over the entire length of the longitudinal direction. vA paulownia for mountain retaining walls.