JPH0710003U - Overhanging site - Google Patents

Abstract

(57) [Summary] [Purpose] Use a small amount of material and increase the width of the overhang to create a strong overhang site. [Structure] A pressure receiving portion 3 is arranged along the slope 2 on the down slope 2 side of the site 1. Similarly, a projecting portion 4 is formed on the slope 2 side so as to form an extension surface of the site 1. The ribs 5 are passed between the pressure receiving portion 3 and the overhanging portion 4 while being appropriately separated from each other on the left and right. An anchor 6 placed from the slope 2 toward the ground of the site 1 is fixed to the pressure receiving portion 3 or the rib 6, and the load acting on the overhanging portion 4 is received by the anchor 6. Since the protruding portion 4 is supported by the rib 5, it is not necessary to increase the thickness of the protruding portion 4. Overhang part 4
Since the anchor 6 receives the load acting on the, it is not necessary to provide a counterweight, and the width of the overhanging portion 4 can be increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a projecting site where a projecting part is provided to expand the site in order to expand the limited road site and building site.

[0002]

[Prior art]

 When the available land for roads and buildings is limited in ports, rivers, or mountainous areas, it is adopted to extend the site by providing a projecting part on the down slope side of the site. Figure 7 shows a conventional overhang site. First, a thick base portion a having a thickness t is provided along the slope, and a projecting portion b projecting toward the slope is provided on the base portion a to form a project site. The load applied to the overhanging portion b is balanced by the weight (counterweight) of the foundation portion a.

[0003]

[Problems to be solved by this device]

 The problem with such conventional overhanging sites is that they require a great deal of material and construction time for construction. First, since the load acting on the overhanging portion b is balanced by the weight of the foundation portion a, the thickness of the foundation portion a becomes extremely thick, which requires a lot of material and labor for construction. It is a thing. Also, since the load applied to the overhanging portion b is supported by the thickness h of the overhanging portion in the vertical direction, the thickness h of this overhanging portion b becomes thicker, which requires a lot of materials and labor for construction. It is. Furthermore, since the foundation part a is constructed so as to be self-supporting by being constructed along the slope, the foundation part must always be erected on the ground in a stable manner, making it extremely difficult to carry out construction on beaches or mountains. You will be forced.

Another problem to be solved by this invention is that the overhanging width w of the overhanging portion b is reduced. In order to balance the load acting on the overhanging portion b with the weight of the foundation portion, if the overhanging portion b is overextended, the weight of the foundation portion a must be increased correspondingly, and the width w of the overhanging portion b is increased. You are naturally limited.

The present invention has been made to solve the above problems, and an object thereof is to provide an overhanging site where a large number of overhanging site portions can be secured with a small amount of material and a short construction period.

[0006]

[Means for Solving the Problems]

 The projecting site according to this invention will have a pressure receiving part along the slope on the down slope side of the site. In addition, a shelf-like projecting part will be projected on the slope side on the extension of the site that has already been cut. In addition, a plurality of ribs are provided between the pressure receiving portion and the projecting portion at appropriate intervals on the left and right with respect to the slope. Anchor driven from the slope to the ground is fixed to the pressure receiving part.

The anchor can also be fixed to the rib through the rib. In addition, the above-mentioned overhanging site can be formed on site by assembling a formwork, but the pressure receiving part, the overhanging part, and the ribs can be integrally made of precast.

[0008]

[Action]

 By using ribs, the ribs support the overhanging portion, so that the thickness of the overhanging portion can be reduced. Since the overhanging part is fixed to the slope by the anchor, the load of the overhanging part is received by the anchor. As a result, the width of the overhanging portion can be increased. Also, the counterweight part is unnecessary.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. In the figure, 1 is an existing road, and a river is on the down slope 2 side. A plate-shaped pressure receiving portion 3 is arranged along the slope 2. Various shapes can be adopted as the pressure receiving portion 3, and the pressure receiving portion 3 may be a flat plate having a rectangular shape as shown in the drawing, and a rib 5 having a thick base portion as described later. A projecting part 4 projects from the upper edge of the pressure receiving part 3 so as to form an extension of the road surface of the existing road 1. A rib 5 is provided between the pressure receiving portion 3 and the overhanging portion 4. A plurality of ribs 5 are formed so as to be appropriately separated from each other on the right and left sides with respect to the slope 2. The pressure receiving portion 3, the overhanging portion 4, and the rib 5 are formed by arranging reinforcing bars on site and forming a formwork. In the embodiment, the pressure receiving portion 3 has a height of 3 m, and the projecting portion 4 has a projecting width of 3 m. The distance between the left and right ribs 5, 5 is also 3m.

A plurality of anchors 6 are driven from the slope 2 toward the ground of the site 1, and the anchors 6 to which a prestress force is applied are fixed to the pressure receiving portion 3. Therefore, since the load of the overhanging portion is received by the anchor 6, the pressure receiving portion 3 may not have a function as a counterweight, the thickness may be thin, and the lower end does not need to be erected on the ground. In the embodiment, as the anchor 6, a ground anchor in which a plurality of steel strands, which are tensile members, are arranged in the sheath is used.

FIGS. 4 to 6 show the case where the anchor 6 is fixed to the rib 5, and the case where the anchor 5 penetrates the rib 5 and is fixed at the protruding side end of the rib 5. With such a structure, since the overhanging portion 4 is also pulled toward the slope 2 side, the strength of the overhanging portion is increased. In this case, it is desirable that the anchor 6 penetrates about 1/3 of the length L of the rib 5 on the slope 2 side from above.

The above-described embodiment is a case where the mold is assembled on site, but the pressure receiving portion 3, the protruding portion 4, and the rib 5 are integrally formed in a factory in advance as a precast product, and It is also possible to carry in to the site and fix it with the anchor 6. In this case, the length of one span of the precast product is preferably about 6 m.

[0013]

[Effect of device]

 Since the present invention has the above-mentioned configuration, the following effects can be obtained. A rib is passed between the pressure receiving part and the overhanging part arranged along the slope, and the load of the overhanging part is received by this rib, so it is not necessary to increase the thickness of the overhanging part, and the material cost and the construction period Can be suppressed. An anchor is placed on the slope ground and the projecting site part is fixed by this anchor, and the load acting on the projecting part is received by the anchor, so the counterweight part is not required. Therefore, the thickness of the pressure receiving part can be reduced and it is not necessary to stand the pressure receiving part on the ground. Since the load acting on the overhanging portion is received by the anchor instead of the counterweight, the overhanging width of the overhanging portion can be increased without being affected by the thickness of other portions. By fixing the anchor to the protruding side end of the rib, the load of the protruding portion is received by the anchor, and the strength of the protruding portion increases. The construction period can be further shortened by using the overcast site made of plaster concrete.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of an overhang site according to the present invention.

FIG. 2 is a front view of an overhanging site.

FIG. 3 is a sectional view of an overhanging site.

FIG. 4 is a perspective view of an anchor fixed to a rib.

FIG. 5 is a front view showing a state in which an anchor is fixed to a rib.

FIG. 6 is a cross-sectional view of a state in which an anchor is fixed to a rib.

FIG. 7 is a perspective view of a conventional overhang site.

[Explanation of symbols]

 1 Road site 2 Slope 3 Pressure receiving part 4 Overhanging part 5 Rib 6 Anchor

Claims (3)

[Scope of utility model registration request] 1. A pressure-receiving portion arranged along the slope and a shelf-like protrusion extending over the extension of the site on the downward slope side of the site, and the pressure-receiver is provided at a predetermined interval to the left and right of the slope. An overhanging site where multiple ribs are passed between the projecting section and the projecting section, and the anchor placed on the ground from the slope is fixed to the pressure receiving section. 2. A pressure-receiving portion disposed along the slope and a shelf-like protrusion extending over the extension of the site are provided on the downward slope side of the site, and the pressure-receiver is provided at predetermined intervals on the left and right of the slope. A projecting site where multiple ribs are passed between the section and the projecting section, and the anchors placed on the ground through these ribs are fixed to the ribs. 3. The overhang site according to claim 1, wherein the pressure receiving portion, the overhanging portion, and the rib are integrally made of precast concrete.