JPH0218153Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to an earth retaining structure using a covered type variable slope gutter block having a substantially U-shaped cross section.

(Prior art) Taking advantage of the advantage of variable slope gutter blocks, which can obtain any drainage slope by later placing floor concrete, it has become popular to use this for earth retaining structures on road sides that are subject to unilateral earth pressure. It is being done.

Its structure is as shown in Fig. 6. A bottom foundation concrete layer is poured on the foundation stone layer A, and the variable slope gutter block body C is laid on top of it. Insert the horizontal reinforcing bars into the reinforcing bar hole 2 connected to the side wall (roadway side), and then insert the floor concrete into the bottom foundation concrete hole inside the block body, and also insert the floor concrete into the bottom foundation concrete hole on the outside roadway side. The foundation is constructed by separately pouring concrete for the side foundations.

However, this conventional structure has the following drawbacks.

First, when the rotational moment due to one-sided earth pressure acts with the lower end of the opposite side wall as the axis point, as shown by the arrow in the figure, the dimension from the reinforcing bar hole N to the lower end of the side wall containing the reinforcing bar hole N is insufficient. As shown in Figure 7, the concrete part at the lower end following the reinforcing bar holes is easily destroyed. Furthermore, since there is little coverage of the reinforcing bars in the floor concrete part, the degree of fixation of the reinforcing bars is low, and there is a risk that the reinforcing bars may fall out due to destruction of the concrete part.

Second, because the bottom foundation concrete, side foundation concrete, and floor concrete are cast in separate steps, the bottom foundation concrete does not function as a resistance moment with respect to the rotational moment. Therefore, in order to maintain the balance, it is necessary to increase the size of the foundation concrete, which is uneconomical. Additionally, the overall strength of the foundation is low and it is easily broken.

Third, there are many construction steps, which increases construction costs.

In addition, since the bottom foundation concrete floor can be uneven during construction, it is necessary to finish it 1 to 2 cm lower than the design.For this reason, when constructing the main body, wedges were first placed on the side walls, and then the floor concrete was poured. It is difficult for the fresh concrete to enter the lower part of the side wall, and even a small amount of concrete that has entered the wall may not be able to withstand the load from above (by the vehicle) and may break.

(Problems to be solved by the invention) This invention was made in view of the actual situation of conventional structures, and it utilizes a covered type variable gutter block, and the foundation and floor concrete are integrally molded with the side walls submerged. At the same time, the above-mentioned difficulties are attempted to be solved by intersecting reinforcing bars between anchor reinforcing bars and horizontal reinforcing bars.

[Structure of the idea]

(Example) The following will be described with reference to an example shown in the drawings. Fig. 1 shows a lid-hung type variable slope gutter block body used in the earth retaining structure of the present invention.

That is, 2 is a substantially U-shaped block body, and a punched part 3 is provided in the center of the bottom wall 2a of the block body, which penetrates into one side wall 2b.
, and laterally annular anchor reinforcing bars 4 are connected at predetermined intervals on the lower end surface of one side wall 2b. 5 is a transverse reinforcing bar inserted into the anchor reinforcing bar 4 from the horizontal direction.

The earth retaining structure of the present invention will now be explained in the order of its construction.As shown in Figures 2 to 4, the block body 2 is placed on a foundation stone layer 1, and its anchor reinforcing bars 4 are connected in series. The side wall 2b is laid so as to be located on the side receiving one-sided earth pressure (roadway side). Then, the horizontal reinforcing bars 5 extending from the inside and outside of the one side wall 2b are inserted and arranged through each of the anchor reinforcing bars 4, and finally, the floor and foundation concrete 6 are cast and integrated into the foundation space spanning both the inside and outside of the one side wall 2b. Shape and complete.

FIG. 5 shows another aspect of the anchor reinforcing bars connected to one side wall 2b, in which a horizontal L-shaped anchor reinforcing bar 4 is installed instead of the horizontal annular one. In this case, the horizontal reinforcing bar 5 is the L-shaped anchor reinforcing bar 4.
The reinforcing bars are arranged parallel to the horizontal part 4a of the bar.

[Effect of idea]

The present invention is constructed as described above, and since the anchor reinforcing bars 4 of one side wall 2b are embedded in the height direction, the anchoring length is sufficient, and the reinforcing bars are subjected to tensile force. , Also, the concrete cover of the horizontal reinforcing bar 5 is sufficient, and both the concrete and the reinforcing bar will break and there will be no omissions.

Furthermore, since the floor and the foundation concrete 6 are integrally molded, the entirety functions as a resistance stress against the stress of rotational moment. Therefore, the area corresponding to the conventional side foundation concrete is small, resulting in an economical cross-section. Furthermore, this integration increases durability against vehicle loads, etc., and there is no risk of breakage. The factor of uneven settlement is also removed.

In addition, in terms of construction, the floor and foundation concrete 6 are integrally molded, which greatly simplifies the process, and the thickness of the bottom wall 2a (of the punched part 3) at the front and back plays the role of a pedestal. Since a wedge is not required for positioning the block body 2, faster construction is possible. Needless to say, construction costs are saved.

[Brief explanation of the drawing]

Figures 1 to 5 show the earth retaining structure of the present invention,
Figure 1 is a perspective view of the cover-hung type variable slope gutter block body and horizontal reinforcing bars only, Figure 2 is a side view, Figure 3 is a front view of the same as above, Figure 4 is a vertical front view of the same as above, and Figure 5 is a front view of the same as above. The figure is a longitudinal front view showing another aspect of the anchor reinforcing bar, Figures 6 and 7 show the conventional earth retaining structure, Figure 6 is the front view, and Figure 7 shows the broken state of the lower side wall of the block body. Partial side view. DESCRIPTION OF SYMBOLS 1...Foundation stone layer, 2...Body of cover-mounted variable slope gutter block, 2a...Bottom wall thereof, 2b...One side wall thereof, 3...Punching portion, 4...Anchor reinforcing bar, 5
...horizontal reinforcement, 6...floor, foundation concrete.

Claims (1)

[Scope of utility model registration request] On the foundation stone layer 1, there is a punched part 3 in the center of the bottom wall 2a that penetrates one side wall 2b, and the one side wall 2
A cover-hung type variable slope gutter block main body 2 with anchor reinforcing bars 4 connected thereto is laid on the lower end surface of b, and horizontal reinforcing bars 5 extending from the inside and outside of the side wall 2b are cross-reinforced on each of the anchor reinforcing bars 4, and the one side wall An earth retaining structure using a covered type variable slope gutter block made by integrally pouring a floor and foundation concrete 6 in the foundation space spanning both the inside and outside of 2b.