JPS61102914A - Reinforcement work of soil cement-sheathing wall - Google Patents

Abstract

PURPOSE:To raise the safety of a soil cement-sheathing wall by a method in which a cement-based hardener is mixed with soil under the ground to form a columnar soil pile, and an H-steel with a reinforcement is penetrated into the soil pile. CONSTITUTION:The ground between soil piles A reinforced with an H-steel with reinforcements 2 is excavated to form a hole, and the soil is mixed with a cement-based hardener to form a soil pile 1. H-steel 3 with reinforcement 2 is penetrated between the soil piles 1. The same processes are repeated to construct a soil cement-sheathing wall under the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for reinforcing soil cement retaining walls.

(Prior Art) Recently, soil-cement mounding walls have been widely used as an alternative construction method to retaining walls in the form of main pile horizontal piles.

For soil-cement hill fill walls, cement-based hardening material is mixed in the required ground to create columns of soil or R-piles, and then H-beams, etc. are inserted every other or two columns into the piles. This is a columnar basement wall construction method.

(Problems to be Solved by the Invention) Currently, no unified design method has been proposed for the soil-cement pile walls, but reinforcing members such as H-shaped steel are used as the parent piles, and the fill pile portions are made of horizontal sheet piles. Considering this, calculations are often performed in accordance with the design method for retaining walls in the form of main piles and sheet piles. The type of reinforcing material and the insertion pitch are appropriately selected in consideration of the lateral pressure and the displacement of the retaining wall.

The strength of the fill pile portion corresponding to the horizontal sheet pile in the soil-cement retaining wall varies depending on the type in situ, but is approximately 5 to IQ kg/cxl, and the strength varies widely, and collapse of this portion is serious. To avoid accidents, it was necessary to improve the safety of this area.

(Means for Solving the Problems) The present invention was proposed in view of the above-mentioned circumstances. After creating column-shaped soil piles by mixing cement-based hardening material in the ground, This relates to a method for reinforcing soil-cement pile walls, which is characterized by installing reinforcing materials on the walls and inserting fcH-type steel materials. The purpose of this invention is to effectively reinforce the retaining wall and improve the safety of the retaining wall.

(Function) and (Effects of the Invention) In the present invention, as described above, after a cement-based hardening material is mixed in the ground to create a column-shaped soil or J-tile, an H-shaped steel is installed with a reinforcing material. The fill pile is reinforced by the reinforcing material, eliminating the possibility of collapse and improving the safety of the fill cement mountain wall.

Furthermore, by reinforcing the fill pile portion as described above, the insertion pitch of the H-shaped steel can be increased, and the amount of H-shaped steel used can be reduced.

(Example) The present invention will be described below with reference to the illustrated embodiments.

As will be described later, holes are made using an earth auger or the like between adjacent reinforcing soil piles reinforced by HW steel materials with reinforcing materials, and a cement-based hardening material is mixed to form a soil pile frame (1).

(See Figures 2 and 3) Next, the H-shaped steel member (3) equipped with the reinforcing material (2) is inserted into the fill pile frame (1). (See Figure 4) Figures 6 and 7 show details of the H-shaped steel material (3) with a reinforcing material, and reinforcement of wire mesh, vinyl mesh, etc. with a reinforcing material fixing jig (4) welded to the lower edge. Material (2) to H-shaped steel material (3)
The reinforcing material fixing jig (4) K is attached to the 7th rank part, and a locking part provided with the reinforcing material fixing jig (4) is fitted into the 7th rank part.

Note that when the E-shaped steel material (3) is pulled out and recovered, the fixing jig (4) is cut off and left in the retaining wall together with the reinforcing material (2).

FIG. 5 shows the inserted state of the H-type steel (3) and the reinforcing material (2). 1) The front and back reinforcing members (2), which are suspended above and whose lower edges are welded to the fixing jig (4), are placed on the ground on both sides sandwiching the Filmale frame (1). Replace it with a pair of rolls (5), insert the H-type steel (3) into the fill pile frame (1), and unwind the reinforcing material (2) to insert the H-type steel (3) into the fill pile frame (1).
3), the front and back seven flange portions are attached, and the fill pile is reinforced with the H-shaped steel material (3) and the reinforcing material (2) thus constructed (the two adjacent fill piles (A) (A) (See Figure 4) The same process is then repeated to construct a fill cement mountain wall underground.

FIGS. 8 to 10 show the steps of another embodiment of the present invention, in which the base ends of both legs of a U-shaped reinforcing member (5) made of reinforcing bars or the like are formed on the inner surfaces of each of the front and back seven flange parts. It uses welded (6) H-shaped steel material (3), (see Figure 11)
The process of reinforcing the soil cement mounding wall shown in FIGS. 8 to 10 using the same H-type steel material (3) is substantially the same as that of the previous embodiment, so a description thereof will be omitted.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional plan view of a fill cement Sanno-me wall to which an embodiment of the method of the present invention is applied, FIGS. 2 to 4 are cross-sectional plan views showing the process, and FIG. The arrow v-v view, FIGS. 6 and 7 are front views and side views of the H-shaped steel material equipped with reinforcing members, respectively, and FIGS. 8 to 10 show other implementations of the method of the present invention. A cross-sectional plan view showing an example process, and FIG. 11 is a perspective view of an H-shaped steel member equipped with a reinforcing member. (1)...Soil/(Illumination structure, (2)...Reinforcement material, (3)...H-shaped steel material, (5)...Reinforcement material, prisoner (A
')...Filno ξil agent Patent attorney Shige Okamoto 3 people outside of the book No. 37 Figure 4 Figure 60 Figure 7 Figure 9g Figure 10

Claims (1)

[Claims] This is a method for reinforcing a soil-cement retaining wall, which is characterized in that a column-shaped soil pile is created by mixing a cement-based hardening material in the ground, and then an H-shaped steel member equipped with a reinforcing material is inserted into the soil pile.