JPH02252818A - Building of earth wall reinforced with l-shaped panel - Google Patents

Abstract

PURPOSE:To enable a safe, economical and high retaining wall to be built by forming a L-shaped panel, tie-rod anchor plate, and newly erecting a L- shaped panel in a position receding therefrom by a predetermined distance. CONSTITUTION:A block 18 is formed of an L-shaped panel 3, tie rod 4, anchor plate 5 and tie rod connecting fitting 8. A plurality of the L-shaped panels 3 are horizontally placed, and the tie rods 4 and anchor plates 5 are mounted to the panels for banking 2. When the bank 2 reaches the height 2a, the upper tie rod 4 and anchor plate 5 are mounted. When the bank reaches the height 2b by further banking, the L-shaped panels 3 are erected at intervals W on spreaded sand 9. Thus, a retaining wall is withdrawn for building so that the blocks can be sunk independently by the banking.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a reinforced earth wall construction method for embankment.

[Conventional technology] When constructing roads or railways on flat land or sloped land, or when creating various types of embankments for industrial land, residential land, etc.
Retaining walls made of concrete or the like may be installed to stabilize the embankment, to limit land use, or to reduce soil volume and construction costs. The reinforced earth wall construction method for installing this earth retaining wall includes upper and lower panels 101 as shown in FIG.
A compressible spacer 103 is interposed between the anchor plates 102 and an anchor plate 107 is fixed to the end of the tie rod 104 to form a reinforcement 110.
0 corresponds to the downward displacement in the figure, the spacer 10
There is a telescope method in which the panels 101 and 102 can also be relatively compressed and sunk by compression of the number 3. Alternatively, as shown in FIG. 6, there is a sliding method in which the connecting fitting 105 of the reinforcing material 110 to the panel 101 can slide downward according to the displacement of the reinforcing material 110 due to the embankment. Furthermore, as shown in FIG. 7, a vertically elongated through hole 106 is provided in the panel 101, a tie rod 104 is inserted into the through hole 106, and the tie rod 104 is fastened at the upper part of the through hole 106. This is done using a construction method such as a through-hole method that can accommodate downward displacement of the reinforcing material 110.

[Problem to be solved by the invention] However, in each of the above construction methods, the amount of consolidation settlement of the embankment varies depending on the soil quality, embankment height, construction method, etc., and it is not easy to accurately predict the effect. It is difficult to grasp the

Furthermore, even if the reinforcement members (consisting of tie rods and anchor plates) are not sufficiently effective and excessive stress is applied to them, it is difficult to detect, and this can only be discovered after an accident occurs in which the reinforcement members break and the wall collapses. .

In addition, in the telescope method (Fig. 5), the panel 101
．． Since it is necessary to increase the amount of compression of the wall body composed of panels 102, the individual panels 101 and 102 are formed small and a large number of spacers 103 are interposed, which increases the number of reinforcing members 110, resulting in relatively high material and construction costs. Become. In addition, there is an economical problem because it is necessary to select a high quality embankment in order to reduce the amount of consolidation settlement of the embankment. Therefore, the present invention provides a reinforced earth wall construction method using L-shaped panels to eliminate such inconveniences.

[Means for solving problem m] In order to solve the above problem, L-shaped panels equipped with tie rod connection fittings with two or more force points in each of the height direction and horizontal direction are erected continuously in the horizontal direction. , Connect the tie rod to the lower connection fitting of the above-mentioned type panel, attach an anchor plate to the other end of the tie rod, and fill the soil up to the height of the connection fitting of the upper tie rod, then connect the tie rod to the upper connection fitting of the above-mentioned type panel. Attach an anchor plate to the other end of the tie rod while connecting it to the metal fittings, and fill it up to the vicinity of the upper end of the new L-shaped panel, and place the L-shaped panel horizontally at a position set back a predetermined distance from the inner surface of the above-mentioned panel. This is a reinforced earth wall method using L-shaped panels, which is constructed in a continuous manner, and the tie rods and anchor plates are installed in the same manner as above, and the earth retaining wall of a predetermined height is constructed by repeating embankment.

[Example] This example will be described according to the drawings. FIG. 1 is a sectional view showing a state in which blocks 18 constituted by the diamond-shaped panel 3, tie rods 4, and anchor plates 5 in this embodiment are erected in two stages. That is, the lower block 18 is composed of an L-shaped panel 3, a tie rod 4, and an anchor plate 5, and the upper block 18 is also composed of an L-shaped panel 3, a tie rod 4, and an anchor plate 5. ing. The L-shaped panel 3 is made of concrete, has a height H1 and a bottom plate width, and is formed with a width and a thickness U, as is clear from FIG. 2, which will be described later. In addition, the tie rod (hereinafter referred to as lower tie rod) 4, which is made of a steel round bar and has a length jl, is attached to the bottom plate of the L-shaped panel.
A tie rod connecting fitting (hereinafter referred to as a lower connecting fitting) 8 attached to the end of the bottom plate of the mold panel 3 is vertically fixed to the L-shaped panel 3 with bolts and nuts 20.

Further, at the other end of the lower tie rod 4, an anchor plate 5 made of a rectangular steel plate or concrete is fixed with a nut 10 in a direction parallel to the tie-shaped panel 3. Furthermore, the same lower tie rod 4 is attached at a horizontal distance d from FIG. 2, which will be described later. Further, a tie rod connecting fitting (hereinafter referred to as the upper connecting fitting) 8 is fixed to the inner wall surface 21 of the L-shaped panel 3 at a height h from the lower tie rod 4, and this upper connecting fitting 8 has a length j2. Tie rod, which is a round steel rod (hereinafter referred to as upper tie rod)
4 is fixed to the L-shaped panel 3 in a vertical direction with bolts and nuts 20, and at the other end of this upper tie rod 4, an anchor plate 5 is fixed to the L-shaped panel 3 in a direction parallel to the nut 1.
It is fixed at 0.

Incidentally, as shown in FIG. 2, which will be described later, the upper tie rod 4 is also attached at a position at a horizontal distance d.

Next, a method for constructing a reinforced earth wall using this block 18 will be explained. FIG. 3 is a sectional view of the overall structure of this embodiment, in which a plurality of blocks 18 are erected to construct a reinforced earth wall. FIG. 2 is a view taken along the line A-A in FIG. 3, in which a plurality of L-shaped panels 3 are arranged horizontally and a new L-shaped panel 3 is placed in contact with the inner wall surface 21 of the L-shaped panel 3. FIG. 3 is a plan view showing a state in which a plurality of wafers are arranged horizontally in an upright state. Further, as is clear from this figure, a pair of tie rods 4 are attached to the L-shaped panel 3 at the same height with a distance d between them. Therefore, first, as shown in FIGS. 2 and 3, a plurality of molded panels 3 are placed horizontally on the foundation ground 1.

Then, as shown in Figure 1, the lower tie rod, 4 e,
4 to the lower connection fitting 8.8, and an anchor plate 5.5 to the other end of the tie rod 4.4. Then, an embankment 2 is placed between the inner wall surface 21 of the L-shaped panel 3 and the anchor plate 5.5.

This embankment 2 extends from the foundation ground 1 to 2 shown by the dashed line in Figure 1.
After reaching the height of a, attach the upper tie rod 4゜4 to the upper connection fitting 8.8 and attach the upper tie rod 4.
．． Attach the anchor plate 5.5 to the other end of 4.

Then, the embankment 2 is further made, and when the height of the embankment 2 reaches the height 2b shown by the two-dot chain line in FIG. When installing panel 3, spread sand 9 to ensure accurate installation, and
A new L-shaped panel 3 is erected with a gap W between the inner wall surface 21 of the mold panel 3 and the outer wall surface 22 of the L-shaped panel 3 newly positioned above. Next, the lower connection fitting 8 of the L-shaped panel 3
, 8 with the tie rods 4.4 and the anchor plates 5.5 and then embanking as described above. These steps are repeated to construct a mud wall of a predetermined height.

To explain the function based on the above structure, since the L-shaped panel 3 is connected to the anchor plate 5 via the tie rod 4, the collapse of the L-shaped panel 3 due to the earth pressure applied to the anchor plate 5 is prevented, and the block 1
It will be integrated with the embankment within 8. Therefore, even if each of the blocks 18 in the reinforced earth wall of this embodiment made of stacked blocks 18 descends and settles, the reinforced earth wall will not collapse because each block 18 descends and settles independently.

That is, as shown in FIGS. 1 and 3, the upper L-shaped panel 3 and the lower L-shaped panel are erected in a backward manner, so that the connecting fittings 8 are subjected to excessive stress due to the sinking of the tie rods 4 due to the embankment 2. No stress is generated. Therefore, it is possible to prevent the tie rod 4 from separating from the L-shaped panel 3 and the L-shaped panel 3 from collapsing without receiving the support of the anchor plate 5. Then, the reinforced area (reinforced earth wall block) indicated by the dashed line 11 shown in FIG. 3 is formed.

In addition, depending on the reinforcement range of the embankment or the nature of the embankment,
It goes without saying that the dimensions of the tie-shaped panel, the length, diameter and number of tie rods, the size of the anchor plate, etc. are determined.

Next, another embodiment is shown in FIG. As is clear from FIG. 4, this is a sectional view when a reinforced earthen wall is constructed in which the L-shaped panels 3 are set back a distance W from each other to form a horizontal flat step 25. The flat stepped portion 25 formed in this way can be used as a passageway or can be used for planting trees, and the distance I! 1II
W can be arbitrarily selected.

Note that even if the L-shaped panels 3 are moved back from each other by a distance of W to construct a reinforced earthen wall, the same operation and effect as in the above-mentioned embodiments can be obtained.

[Effects of the Invention] As detailed above, the present invention constructs a reinforced earth wall by receding and erecting L-shaped panels.

Therefore, the blocks formed by each panel, tie rod, and anchor plate have a structure that allows them to sink independently of each other due to the embankment, so even if the tie rod sinks due to the embankment, the L-shaped panel to which the tie rod is fixed will also suffer the same effect. Due to the sinking, excessive stress is not applied to the tie rod connection fittings and the connection fittings are not damaged.

That is, the block composed of the tie rod, anchor plate, and L-shaped panel sinks as a unit.

Therefore, according to the present invention, it is possible to construct a high earth retaining wall, and the construction work is easy, safe, and economically superior.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a block composed of an L-shaped panel, tie rods and anchor plates, Fig. 2 is a plan view when the blocks are arranged horizontally, and the third factor is the overall structure of the embodiment. 4 is a sectional view of the overall structure of another embodiment, and FIGS. 5 to 7 are conventional examples. FIG. 5 is a telescope system, FIG. 6 is a slide system, and FIG. It is a diagram of a hole method. 1...Foundation ground 2...Embankment 3-...L-shaped panel 4...Tie rod 5...Anchor plate 8...Tie rod connection fittings

Claims (1)

[Claims] L-shaped panels each having two or more tie-rod connection fittings in the height direction and the horizontal direction are continuously erected in the horizontal direction, and the tie-rods are connected to the lower connection fittings of the L-shaped panel, and the tie-rods are After attaching an anchor plate to the other end and filling the earth up to the height of the upper tie rod connection fitting, connect the tie rod to the upper connection fitting of the L-shaped panel and attach an anchor plate to the other end of the tie rod, and then install the anchor plate to the other end of the L-shaped panel. Fill the earth up to the vicinity of the upper end surface, then erect a new L-shaped panel in a row in the horizontal direction at a position set back a predetermined distance from the inner surface of the L-shaped panel, and install tie rods and anchor plates and fill the embankment in the same manner as above. A reinforced earth wall construction method using L-shaped panels, which is characterized by repeatedly building an earth retaining wall of a predetermined height.