JPH09302665A - Construction method for banking reinforced earth wall for constructing vertical wall surface with sheet pile as wall surface material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the term of works and save the construction cost by using a sheet pile as wall surface material in construction method of banking reinforced earth wall, and provided a slide type joint in the connecting part between the sheet pile and a banking reinforcing material. SOLUTION: A sheet pile 1 is driven as a wall surface plate to the extent to which it can self-stand to wind load without considering the earth pressure, the banking of the bottom part is constructed, a strip or grid reinforcing material 3 is connected to a joint provided on the sheet pile 1, and the banking and the connection of the reinforcing material 3 are successively repeated. The joint is formed by inserting a long shaft bolt (or reinforcement bar) 5 with locking spring to a vertical pair of support plates 4, 6 with insert holes fixed to the sheet pile 1. The back filling banking part is settled by compaction with the lapse of time, but the reinforcing material 3 is settled along the long shaft bolt 5 to add no excessive force to the sheet pile 1. A material 2 for reducing the wall surface friction is interposed between the sheet pile 1 and the banking. Thus, the sheet pile 1 may be driven shallowly, and the work can be simplified.

Description

Detailed Description of the Invention

[Industrial field of application] In order to secure sites such as roads and airfields for public works, constructing upright walls using the reinforced earth wall embankment method has rapidly spread in Japan, where land is scarce. I've been We are convinced that the reinforced earth wall embankment using the sheet pile according to the present invention will be more popular because the construction method is simpler than the conventional reinforced earth wall embankment using the wall panel.

[Prior Art] When an upright wall is constructed by reinforced earth wall embankment, a concrete skin or a metal skin has generally been used for a wall panel. The size of the concrete skin was 1.5 square meters, and it was necessary to take sufficient safety measures when assembling with heavy machinery and when working near the house.

[Problems to be Solved by the Invention] [0003] The present invention is a wall panel that can stand on its own by processing a large number of sheet piles in the market in order to save the construction work by assembling the conventional wall panel. It is intended to be used. The points to be considered for that purpose are as follows. 1. Shortened the range of driving the sheet pile. 2. While the sheet pile hardly sinks, the back gome embankment part is subject to large compression due to its own weight or settlement due to consolidation of the foundation ground, so that the joint between the sheet wall sheet pile and the embankment reinforcement material The quality of the followability greatly affects the stability of this structure. How to handle it. 3. Simplified protective fence.

[Means for Solving the Problems] 1. A sheet pile is used for the wall panel. 2. The sheet piles can be driven in such a way that the sheet piles do not have earth pressure and can stand on their own in consideration of ordinary wind loads. Therefore, the noise inside the pile and the usage period of heavy equipment are shortened. 3. A slide type joint is installed on the sheet pile in order to obtain followability to the settlement of the embankment at the joint between the sheet pile and the embankment reinforcement. The structure of the joint is a structure in which a long shaft bolt with a stop spring or a reinforcing bar is inserted from the upper hole between the iron plates having a pair of upper and lower holes protruding from the sheet pile. See FIG. 4 and FIG. 4. The joints are arranged at regular intervals on the left and right. Further, since the earth pressure becomes higher in the upper and lower parts, the interval is made smaller in the lower part, if necessary. FIG.
reference. 5. (Construction order) As shown in FIG. 7, first, the sheet pile is driven into an amount such that it can stand on its own in consideration of the wind load without earth pressure. Next, embankment 7 is constructed. Next, the reinforcing material of 8 is installed, the long shaft bolt of 9 is inserted from above, and the reinforcing material and the sheet pile are tightly connected. This bolt is a device that stops the stopper spring from jumping up when passing through the hole in the lower mounting plate. Next, embank 10 and compact. And 11.1
2 embankments, 13 reinforcements, 14 bolts, 15 buried soil, and so on. It is also possible to insert a material that reduces wall friction between the wall and the embankment.

[Operation] The back embankment embankment is compacted, but it is normal for it to settle down with the passage of time. However, since the sheet pile hardly sinks, at the joint between the reinforcement material of the embankment and the sheet pile, the reinforcement material descends along the bolt axis of the mounting portion as shown in FIGS. There is no power. The arrangement of sheet piles can also be applied to curved parts. Once the sheet pile is installed, the sheet pile serves as a protective fence. It is easy to manage the vertical wall surface of the sheet pile.

[Embodiment] An embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional structure explanatory diagram in which a reinforced earth embankment is constructed using a sheet pile as an upright wall surface. FIG. 2 is an explanatory view showing the arrangement state and the joining state of the slide type joint and the band-shaped reinforcing material.
FIG. 3 shows an example in which the arrangement of joints becomes denser in the lower part. FIG.
FIG. 5 and FIG. 6 are views for explaining the situation in which various reinforcing materials are attached to the slide type joint. FIG. 7 is an explanatory diagram of the construction order.

[Advantages of the Invention] 1 Since the sheet pile which can stand on its own is used as the wall material, the construction procedure is simplified as compared with the conventional reinforced earth embankment. No heavy equipment was needed to stack two blocks, and the labor of managing upright walls was saved. 3 There is some noise at the time of hammering the sheet pile, but since the hammering is shallow, it ends in a short time and is useful for noise prevention. 4 After installation of the sheet pile, no safety fence is required and safety management is easy. 5 The construction period is shortened and the construction cost is also reduced. 6 It can also be applied to construction in densely populated areas. 7 Use of decorative sheet piles also helps to beautify the environment.

[Brief description of drawings]

FIG. 1 is a cross-sectional structure explanatory diagram of a reinforced earth wall embankment using a sheet pile as an upright wall surface.

FIG. 2 is a bird cage diagram for explaining the internal structure of a reinforced earth wall embankment (in the case of a band-shaped reinforcement) using a sheet pile as an upright wall surface.

FIG. 3 is an example of a layout view of a slide type joint attached to the back surface of the sheet pile. The lower soil pressure is, the denser the arrangement is.

FIG. 4 is an explanatory diagram showing a situation in which a belt-shaped reinforcing material is joined to a slide type joint structure.

FIG. 5 is an explanatory diagram showing a situation in which a rod-shaped reinforcing material is joined to a slide type joint structure.

FIG. 6 is an explanatory view showing a situation in which a grid-like reinforcing material is joined to a slide type joint structure.

FIG. 7 is a drawing explaining a construction order. Construction is carried out in order from 7 to 15.

[Explanation of symbols]

 1 Sheet Pile (Wall Member) 2 Material that Reduces Wall Friction 3 Reinforcing Material 4 Upper Perforated Support Plate of Sliding Joint 5 Long Shaft Bolt with Stop Spring for Sliding Joint 6 Lower Perforating Support Plate of Sliding Joint 7 Rooting 8 Reinforcement 9 Long shaft bolt with a retaining spring 10 Filled soil portion 11 Embankment 12 Embankment 13 Reinforcing material 14 Long axis bolt with retaining spring 15 Buried soil 16 Sheet pile driven rooting portion

Claims (2)

[Claims] 1. Use of a sheet pile as a wall material for constructing a vertical wall surface by a reinforced earth wall embankment method. 2. A structure of a slide type joint installed on the back surface of the sheet pile and a structure of arranging the joints on the left and right and at a certain number of upper and lower stages at fixed intervals.