JPH09132906A - Structure of guard rail closely building-up foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set a guard rail on an earth wall, a masonry and a cliff by making a foundation for support installation by burying a plural number of anchors arranged with bearing plates on them by installing them and integrating parts sandwiched by a foundation wall body and the bearing plates. SOLUTION: A plural number of the other ends of anchors installed with bearing plates 8 on one ends are installed on a back surface of a foundation wall body 4. Additionally, as they are buried in the back filled earth roughly in parallel, they integrally work with intermediately buried earth 14 in accordance with a reinforcing earth effect of an anchor tensile material 6 and earth pressure resisting work of the bearing plates 8 between the bearing plates 8 and the foundation wall body 4. Furthermore, they are further strengthened by resisting external force applied on a guard rail by an integrated block and making a concrete wall in front of the bearing plates 8. Consequently, it is possible to provide strong support foundation structure at the time of setting the guard rail.

Description

Detailed Description of the Invention

[Industrial field of application] When a wall facility structure such as a masonry lower retaining wall is vulnerable on a road on a reinforced embankment or on a road contacting a steep cliff, to install a guard rail or other vehicle protection facility, A foundation structure that does not have a strong influence on wall structures is required. The foundation according to the present invention is sufficiently useful as a foundation structure for installing a guardrail in such a case.

[Prior Art] Conventional guardrail installation, as shown in the guard fence installation guideline, etc., pierces the pillar deeply into the soil, is embedded in the concrete retaining wall, or is used as a single concrete block. Measures such as building were taken. However, using these methods alone was difficult for a steep cliff or a reinforced earth wall.

[Problems to be Solved by the Invention] It is impossible to bury pillars deeply or to construct a single concrete block or the like if the lower part has a reinforced soil wall structure,
In addition, even in the case of a steep cliff or masonry, it is not possible to exert sufficient resistance to the impact force of the vehicle. The reason is that the front surface of the column base is thinly coated. If the shock resistance is weak, the front coating will be destroyed once an accident occurs.
The purpose of the present invention is to supplement the above-mentioned thinness of the front cover with the back surface of the medium burial, and to support the pillar foundation when installing guardrails etc. on steep cliffs, masonry or reinforced earth wall embankments. The solution is to provide a solution for the structure.

[Means for Solving the Problems] For the purpose of eliminating the above obstacles, the present invention firstly separates a foundation wall into which a guardrail support is embedded from a lower retaining wall or the like, and attaches it to the back surface of the foundation wall. , A plurality of anchors with a bearing plate attached to one end are attached to the other end and are embedded in the back burial soil in a substantially parallel manner. , It is intended to respond to an impact caused by an external force. A stronger structure can be obtained by mixing a solidifying agent in the soil in the front of the bearing plate or by making a concrete wall.

[Operation] According to the structure of the present invention, a plurality of the other ends of the anchor having the pressure bearing plate attached to one end are attached to the back surface of the foundation wall body, and are embedded substantially in parallel with each other in the back soil. Therefore, the space between the bearing plate and the base wall body works together with the buried soil due to the reinforcing soil effect of the anchor tension material and the earth pressure resistance of the bearing plate. This integrated block will resist the external force applied to the guardrail. If a concrete wall is made in front of the bearing plate, it will be further strengthened.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a general explanatory view, FIG. 2 is a cross sectional view, and FIG.
Is a plan view. In FIG. 2, 2 is a guard rail support, 4 is a foundation wall that wraps and supports the lower part of the support, 6 is an anchor tensile member made of steel or the like, 8 is a bearing plate attached to the anchor end, and 10 is an anchor tensile member. To the foundation wall, 12 is a lower structure (masonry, retaining wall, reinforced soil wall, etc.), 14 is a buried soil, 15 is a soil mixed with a solidifying agent or concrete wall, 16 is a lower ground plate, 18 Road pavement

The buried soil between the foundation wall of the guardrail column and the pressure bearing plate forms a block in combination with the reinforcing soil effect of the action of the anchor tensile member and the effect of the pressure bearing plate, and acts as an integral unit.

[Advantage of the Invention] According to the present invention like the ratio, the impact caused by the collision of the car given to the pillar of the guardrail is the whole including the embedded earth sandwiched between the foundation wall and the bearing plate. It becomes a block of and is opposed, and its resistance becomes large. Moreover, since the relationship with the lower retaining wall is not directly connected, it can be said that the impact of the destructive force due to the collision of the car on the guardrail on the lower portion is relatively small. With this structure, it is possible to install guardrails on reinforced soil walls, stone masonry and cliffs.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention in which a guardrail and a foundation wall. It is a general explanatory view showing an anchor attachment situation.

FIG. 2 is a cross-sectional view of a guardrail built-in foundation structure.

FIG. 3 is a plan view of a guardrail built-in foundation structure.

[Explanation of symbols]

 2 Guardrail props 4 Foundation wall that wraps and supports the lower part of the prop 6 Anchor tension member 8 Bearing plate 10 Mounting tool 12 Lower structure (masonry, retaining wall, reinforced soil wall, etc.) 14 Infill soil 15 Soil mixed with solidifying agent Or concrete 16 Lower embankment 18 Road pavement

Claims (1)

[Claims] 1. A plurality of anchors each having a bearing plate at one end are attached to a wall body that encloses a card rail support base,
The structure of the foundation that acts as a support as a whole, including the embedded soil between the bearing plate and the wall.