JPH0813405A - Widening construction of road - Google Patents

Abstract

PURPOSE:To make it possible to drive a pile near to the face of slope to the utmost before the execution, shorten the length of the pile and to enable the reduction of an amount of banking by forming the upper end of a wall in the shape of a haunch projected to the outside, and bearing the side end of a newly constructed road on the diameter enlarged part in the case the ground surface of the existing road is widened to construct the new road thereon. CONSTITUTION:In the case block bodies 3a are combined, and a narrow 6 is formed in a notch section 14 of the joint end face. Piles 9 are erected on the foundation ground 1 at proper intervals. The block bodies 3 are piled up on the ground 1 so that the piles 9 of steel materials are inserted in holes 2 of the block bodies 3a, and the holes are filled with gap filling concrete mortar 18 to fix. The block bodies 3 are piled up to form the wall, and baking 4 is applied to the inside thereof. The enlarged end 17 of a ground anchor 16 is inserted in the narrow 6 from an upward opening, the ground anchor 16 is led to the outside through a slit 15 linked outward from the narrow 6, and it is lowered to provide it in the banking 4. The block body 3a of the upper end of the wall is formed in the shape of a haunch projected to the outside. A new road 13 is constructed on the ground surface widened is a such way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road widening structure for widening a road built on a steep slope.

[0002]

2. Description of the Related Art As described in Japanese Examined Patent Publication No. 4-2733, there is an existing road 12 on a steep slope as shown in FIGS.
If there is, to widen it and make it a new road 13,
First, the foundation ground 1 is dug, the root is inserted, and the piles 9 made of H steel are erected at appropriate intervals.

The block body 3a such as a concrete panel is formed with engaging grooves 10 at both ends, and the block body 3a is fitted between the piles 9 by engaging with the front flange of the pile 9 made of H steel. Wall body 3 by including and stacking vertically
To form.

In addition, in order to apply the embankment 4 to the back side of the wall body 3, the embankment reinforcement material 5 is arranged in the embankment 4 to form a ground, and a new road 13 is constructed on the ground surface of the ground. I am trying to do it. α is the width of the existing road and β is the width of the new road.
In the figure, 7 is the slope before construction and 8 is the surface soil.

According to the wall structure for reinforced soil of Japanese Patent Publication No. 4-2733, since the wall body 3 can be supported by the pile 9,
The length of the reinforcing material 5 in the embankment can be shortened, and the wall body 3 which is a concrete panel can be made continuous so that it can be prevented from falling or protruding, and verticality can be secured.

[0006]

However, the pile 9 is to be installed at a position far away from the slope 7 before construction, and the pile 9 and the wall 3 need to have a certain height, and the embankment 4 As the amount of soil is increased and the earth pressure load applied to the pile 9 and the wall 3 is large, it is required that the pile 9, the wall 3 and the embankment reinforcement 5 have a certain level of strength.

The present invention eliminates the disadvantages of the above-mentioned conventional example, in which the wall body formed by stacking the block bodies on the ground is fixed by the piles standing upright at predetermined intervals, and the back side of the wall body is filled with earth. In the road widening structure in which the ground surface that is the conventional road construction site is widened and the road is constructed on this widened ground surface, the pile can be installed as close as possible to the slope before the construction, and as a result, the pile can be installed. The purpose of the present invention is to provide a road widening structure that can shorten the length of the road and reduce the amount of embankment so that the construction cost can be reduced and the construction period can be rationalized.

[0008]

In order to achieve the above-mentioned object, the present invention firstly requires that the upper end of the wall body is in the form of a haunch that projects outward, and the road side end is supported by this enlarged diameter portion. Secondly, a hole for inserting the pile is formed in the block body constituting the wall body, and the pile is inserted through the wall body, and then the hole is filled with the filling mortar and fixed. In Fig. 3, the ground anchor to be placed in the embankment is inserted into a narrow space obtained by combining notched portions formed on the left and right connecting end surfaces of the block body having the wall-structured block end, and the narrow space mortar is packed in the narrow space. The gist is to fill and fix.

[0009]

According to the present invention as set forth in claim 1, since the upper end of the wall body is formed into a haunch shape protruding outward, the end of the road side can be supported by this portion as an extension of the embankment. The piles and walls can be installed closer to the pre-construction slope compared to the walls of the above, as much as they project outward. As a result, the piles are short, the walls are low, and the amount of embankment is small.

According to the second aspect of the present invention, in addition to the above-mentioned action, the pile and the wall body are integrated with each other through the filling mortar, and the earth pressure and the like are effectively transmitted to the pile and the reinforcement material in the embankment. In addition, the verticality is easy to manage because it is difficult to fall down or locally deform. Further, even if a steel material is used for the pile, it is buried in the filling mortar so that rust does not occur.

According to the third aspect of the present invention, the ground anchor can fix the bulged end by filling the space between the holes, which is narrow, with mortar.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a vertical sectional side view showing an embodiment of a road widening structure of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.
The same components as those in FIGS. 3 and 4 showing the conventional example are designated by the same reference numerals.

Also in the present invention, when there is an existing road 12 on a steep slope, the existing road 12 is widened to form a new road 13. The foundation ground 1 is dug into the ground, and the H is made of H steel. Piles 9 are erected at appropriate intervals, block bodies 3a such as concrete panels are stacked to form a wall body 3, and the wall bodies 3 are supported by the piles 9 and an embankment 4 is applied to the back side thereof.

As in the above-mentioned conventional example, the embankment reinforcing material 5 is arranged in the embankment 4 to form a ground and the new road 13 is constructed on the ground surface of the ground. is there.

According to the present invention, the block body 3a has a hole 2 formed in the central portion in the vertical direction through which a pile 9 made of a steel material such as H steel is inserted, and when the block body 3a is interlocked with each other when the block bodies 3a are combined with each other. The notch 14 forming 6 was formed.

The piles 9 are formed by making a hole in the foundation ground 1 and by embedding the foundation ground at appropriate intervals. Then, the block bodies 3a are stacked on the ground 1 so that the piles 9 are inserted into the holes 2 of the block bodies 3a. At this time, the pile 9 is adjusted so as to be located at the center of the hole 2, and the hole 2 is filled with the filling concrete mortar 18 and fixed.

In this way, if the block bodies 3a of one stage or a predetermined stage are stacked to form the wall body 3 in sequence, the embankment 4 is applied to the inside of the wall body 3 and is formed on the connection end face of the block body 3a. A gap 6 is formed between the notches 14 and the gap 6 is formed between the connecting ends of the block body 3a.
Since the slit 15 communicating from the outside to the outside is formed, the enlarged end portion of the ground anchor 16 is formed in the narrow space 6 from its upper opening.
Insert the 17 and insert this ground anchor 16 through the slit 15.
To the outside and lower it as it is to place it in the embankment 4.

Further, the block body 3a located at the upper end of the wall body 3 has a haunch shape in which the wall body 3 projects outward.

In addition to H steel, steel pipes and reinforced steel baskets may be used for the piles 9, and the enlarging end 17 of the ground anchor 16 is provided with a fixing plate member such as a curved plate, which is used in the space 6 as well. Fill the space with concrete mortar 18 and fix.

In this way, the embankment 4 is applied to the back side of the wall body 3 to widen the ground surface which is the construction site of the existing road 12, and the widened new road 13 is constructed on the widened ground surface.

As described above, the upper end of the wall 3 is formed into a haunch shape that extends outward, and this serves as an extension of the embankment, so that the end on the road side can be supported. The pile 9 and the wall 3 can be installed close to the pre-constructed slope 7 by the amount of overhang.

[0022]

As described above, according to the road widening structure of the present invention, the wall bodies formed by stacking the block bodies on the ground are fixed by the piles which are erected at predetermined intervals, and the back side of the wall bodies is fixed. In the road widening structure in which the ground surface, which is a conventional road construction site, is widened by applying embankment and the road is constructed on the widened ground surface, the pile can be installed as close as possible to the slope before the construction.

As a result, the pile length is short, the height of the wall is low, and the amount of embankment can be reduced.
It is possible to reduce the construction period and rationalize construction.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a road widening structure of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a vertical sectional side view showing a conventional example.

FIG. 4 is a cross-sectional plan view showing a conventional example.

[Explanation of symbols]

1 ... Foundation ground 2 ... Hole 3 ... Wall body 3a ... Block body 4 ... Embankment 5 ... Embankment reinforcement material 6 ... Narrow space 7 ... Pre-construction slope 8 ... Surface soil 9 ... Pile 10 ... Engagement groove 11 ... Engagement Rods 12… Existing roads 13… New roads 14… Notches 15… Slits 16… Ground anchors 17… Large ends 18… Stuffed concrete mortar

Claims (3)

[Claims] 1. A ground surface, which is a construction site of a conventional road, in which a wall body formed by stacking block bodies on the ground is fixed by stakes which are erected at predetermined intervals, and a backside of the wall body is filled with embankment. In the road widening structure in which the road is widened and the road is constructed on the widened ground surface, the upper end of the wall has a haunch shape protruding outward, and the road side end is supported by the widened portion. Widening structure of the road characterized by that. 2. The block body constituting the wall body is formed with a hole through which the pile is inserted, and the pile is inserted through the wall body, and then the mortar is filled into the hole and fixed. Road widening structure. 3. A ground anchor to be arranged in the embankment is inserted into a narrow space obtained by combining notched portions formed on the left and right connecting end faces of a block body having a wall body with its enlarged end portion, and the ground anchor is inserted into the narrow space. The road widening structure according to claim 1 or 2, wherein the filling mortar is filled and fixed.