JP4345926B2 - Formwork and construction method for gentle slope method fill - Google Patents

Description

  The present invention relates to a method of performing embankment on a gentle slope slope with good workability, and a grid form used therefor.

  A substantially L-shaped lattice form made of welded wire mesh or expanded metal is widely used in embankment construction. During the embankment work, such a grid form is placed on the front of the slope of the ground, which is the construction site. After embankment between the grid form and the ground, the upper part of the embankment is rolled and compacted. A multistage embankment structure is formed by sequentially repeating the operation from the bottom to the top. In many cases, this method is reinforced by laying geogrids on the embankment.

  In such a construction method, the rolling pressure after embankment is limited to the upper surface side, so it is not suitable for embankment with a gentle slope slope. In other words, in the embankment with a steep slope, the compaction effect can be exerted over almost the entire surface of the embankment layer by rolling from the upper surface side. Then, it is not possible to expect a compacting effect on the embankment layer below the slope. Therefore, the applicant first reinforces the embankment by laying a geogrid on the embankment, and after rolling and compacting the upper part of the embankment and the slope part, another geogrid is attached to the slope part, We proposed a method of linking with the previously laid geogrid.

  As in the previous proposal, the present invention is a method related to embankment with a gentle slope slope, which can perform the embankment work with good workability and can firmly compact the entire embankment section including the slope section. The present invention provides an embankment method capable of forming an even stronger embankment layer and a grid form used in the embankment method.

  That is, according to the present invention, on the embankment foundation, a bottom surface lattice portion having a mountain-height portion linearly connected in the width direction, and a slope support lattice connected to the bottom surface grid mold form so as to be able to rotate at an obtuse angle. A step (1) of spreading and placing a grid form consisting of a portion so that the bottom lattice portion and the slope supporting lattice portion are arranged on the embankment foundation, and the end portion of the geogrid is the bottom lattice portion After laying so as to be buried in a mountain height that is linearly connected in the width direction, a step (2) of connecting the geogrid and the bottom lattice portion by inserting a long connecting rod into the mountain height, Step (3) of embedding on the bottom grid part and the geogrid to form a bank layer with a gentle slope slope, rolling the gentle slope slope part and the upper part of the bank, and then rotating the slope support grid part A gentle gradient slope fill method comprising the step (4) of placing on the gentle slope slope is proposed. It is.

  According to the present invention, a method is also provided in which a bottom grid portion having a mountain-height portion linearly connected in the width direction is connected to a foundation foundation having a slope so as to be rotatable at an obtuse angle with respect to the bottom grid mold. (1) a step of placing a grid form consisting of a grid part for surface support with a bottom grid part on the embankment foundation and a grid part for slope support on a slope, After laying so that the end part is buried in the peak part linearly connected in the width direction of the bottom grid part, the long grid connecting rod is inserted into the peak part to connect the geogrid and the bottom grid part. Step (2), step (3) of embankment on the embankment foundation, bottom grid part and geogrid to form a embankment layer with a gentle gradient slope, rolling down the gentle slope slope part and the top of the embankment, and then supporting the slope The gentle gradient method comprising the step (4) of rotating the grid portion for placement on the gentle gradient slope surface portion Fill method is provided.

  Furthermore, according to this invention, it formed by process (1)-(4) in the above-mentioned 2 construction methods using the grid mold (A) which has a hook part in the grid part top part for a slope support as a grid mold. A bottom lattice portion having a mountain-height portion linearly connected in the width direction on an upper portion of the embankment having a gentle gradient slope, and a slope support lattice portion connected to the bottom lattice mold form so as to be able to rotate at an obtuse angle. The other grid mold (B) is formed so that the top hook portion of the grid mold (A) protrudes from the end of the bottom grid section of the grid mold (B), and the grid mold (B) The step (5) of placing and placing the slope support grid portion so as to overlap the slope support grid portion of the grid formwork (A) placed on the gentle slope slope, the geogrid After laying so that the end is buried in the mountain-height part that is linearly connected in the width direction of the bottom grid part of the grid mold (B), A step (6) of connecting the geogrid and the bottom grid portion by inserting a long connecting rod into the mountain height portion, embedding the above-mentioned embankment, the bottom grid portion and the geogrid to form a gentle slope slope fill layer After the step (7) of forming, the gentle slope slope part and the upper part of the embankment are rolled, the slope support grid part of the grid mold (B) is rotated and arranged on the newly formed gentle slope slope part. A gentle gradient method embankment method comprising step (8) is provided.

  Furthermore, according to the present invention, there is a method in which a bottom lattice portion having a mountain-height portion linearly connected in the width direction and a hook portion at the top portion are connected to the bottom lattice form frame so as to be rotatable at an obtuse angle. There is provided a grid pattern for a gentle gradient method embankment comprising a grid portion for surface support.

  According to the present invention, it is possible to perform embedding and compaction with good workability and to form a slope with excellent durability in embankment construction with a gentle slope slope.

  Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a grid pattern 1 for gentle slope slope embankment used for embankment work of the present invention, and FIG. 2 is a side view thereof. 1 and 2, a grid mold 1 includes a welded wire mesh slope support having a bottom grid portion 2 made of a welded wire mesh having a peak portion 4 linearly connected in the width direction and a hook portion 5 at the top. It consists of a grid part 3 for use, and both of them are connected to each other by a ring 6 so as to be rotatable. The peak part 4 of the bottom grid part 2 is a part that is overlapped with the end part of the geogrid used for embankment reinforcement, and is laid so that the mesh of the geogrid is inserted into the peak part. The bottom connecting portion and the geogrid are connected by inserting a long connecting rod therein, and any mountain shape may be used as long as it has an insertion space for the long connecting rod. The hook portion 5 provided on the top of the slope supporting grid portion 3 is a portion used for connecting the upper molds when the slopes are formed in multiple stages, and the hooks are used as the upper molds. By placing the upper mold so as to protrude from between the end lattices of the bottom lattice portion, there is an effect of connecting while restricting the vertical movement due to the hooking effect of the hook portion. Therefore, the shape of the hook portion may be any shape as long as the hook portion has an appropriate bending portion effective to catch. Moreover, you may use the lattice form which does not have such a hook part which is a connection end for the uppermost embankment layer. Further, the ring 6 that connects the bottom grid portion 1 and the slope support grid portion 2 is capable of rotating both at an obtuse angle so as not to prevent rolling of the bank and slope during embankment. The slope support part 2 is arranged on the embankment foundation, or if the embankment foundation has a slope, it is placed on the slope and newly formed after the embankment rolling. The reinforcement is intended by arranging it above. Therefore, instead of the ring 6, a coil or a hinge can be used as long as it can rotate at an obtuse angle.

  3-5 is drawing which shows the outline of the embankment construction method of this invention. In FIG. 3, the bottom grid portion 2 of the grid form 1 is placed on the embankment foundation 7 in front of the ground 8, and the grid formwork is centered on the ring 6 on the gentle slope slope 11 of the embankment foundation 7. 1 slope support grid part 3 is rotated and mounted. If the embankment foundation has a flat surface rather than a slope, the slope support grid portion 3 is placed on the embankment foundation. The geogrid 9 is laid on the embankment foundation 7 so that the end of the geogrid 9 is overlapped with the bottom grid portion 2 so that the mesh is inserted into the peak portion 4 of the bottom grid portion 2. The long connecting rod 12 is inserted into the mountain height portion 4 so as to press the geogrid 9, and the geogrid 9 is connected to the bottom lattice portion 2. The other end of the geogrid is fixed on the embankment foundation by anchor bolts (not shown). The embankment 10 is applied on the bottom grid part in front of the natural ground 8, the geogrid and the embankment foundation. After embankment to a predetermined height so as to form a gentle slope slope 31, the upper surface and slope of the embankment 10 are rolled and compacted sufficiently. Next, the slope support portion 3 is rotated and arranged on the slope 31 to complete the first level of the embankment work (FIG. 4). An appropriate inclination angle of the gentle gradient slope 31 is about 45 to 10 degrees.

  The second-stage embankment work is performed except that the same grid mold 21 as the grid mold 1 is placed so that the bottom grid 22 protrudes from the end grid between the hooks 5 of the grid mold 1. It is carried out in the same way as the first level embankment work. That is, in FIG. 5, the bottom lattice part 22 of the lattice form 21 is placed on the top of the embankment 10 in front of the natural ground 8 so that the hook part 5 of the lattice form 1 protrudes from between the end lattices. In addition, on the slope support grid portion 3 of the grid form frame 1 on the gentle slope slope 31 of the embankment 10, the slope support grid portion 23 of the grid form frame 21 is rotated around the ring 26 and placed. To do. The geogrid 29 is laid on the embankment 10 so that the end of the geogrid 29 is overlapped with the bottom grid portion 22 so that the mesh is inserted into the peak portion 24 of the bottom grid portion 22. A long connecting rod 32 is inserted into the mountain height portion 24 so as to press the geogrid 29, and the geogrid 29 is connected to the bottom lattice portion 22. The other end of the geogrid 29 is fixed on the embankment foundation by anchor bolts (not shown). The embankment 30 is applied on the bottom grid 22, the geogrid 29, and the embankment 10 in front of the natural ground 8. After embankment to a predetermined height so as to form a gentle gradient slope, the upper surface and slope of the embankment 30 are rolled and compacted sufficiently. Next, the slope support portion 23 is rotated and placed on the newly formed slope, and the second level banking work is completed.

  By repeating such operations, a multi-stage embankment structure can be constructed. As the lattice form used for the uppermost embankment part, one having no hook part at the top of the slope support part may be used.

It is a perspective view of the lattice form of the present invention. It is a side view of the lattice form of the present invention. It is drawing which shows the embankment method of this invention. It is drawing which shows the embankment method of this invention. It is drawing which shows the embankment method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lattice form frame 2 Bottom lattice part 3 Lattice part for slope support 4 Mountain height part 5 Hook part 6 Ring 7 Embankment foundation 8 Ground mountain 9 Geogrid 11 Slope 12 Long connecting rod 21 Grid form 22 Bottom lattice part 23 method Surface support grid part 24 Mountain height part 25 Hook part 26 Ring 27 Embankment foundation 29 Geogrid 30 Embankment 31 Slope 32 Long connecting rod

Claims (2)

On embankment foundation, Ri Do and a Slope support trellis portion which is pivotally connected to an obtuse angle to the bottom surface grating section and the bottom surface lattice-type frame having a bowler portion continuous with linearly in the width direction, Law surface support trellis section top grating mold that having a hook portion on the (a), steps a bottom surface grating section and slope support trellis portion is placed spread to place on the embankment foundation (1) After laying the geogrid so that the end of the geogrid is buried in the height of the mountain that is linearly connected in the width direction of the bottom grid, insert the long connecting rod into the height of the geogrid and insert the geogrid and the bottom grid. Step (2) for connecting parts, Step (3) for embankment on the embankment foundation, bottom grid part and geogrid to form a embankment layer with a gentle gradient slope, after rolling the gentle slope slope section and the top of the embankment , form the step (4) to place on the moderate gradient method surface rotates the slope support trellis section A bottom surface grid portion having a mountain-height portion linearly connected in the width direction and an upper surface of the embankment having a gentle slope slope and a slope support lattice connected to the bottom surface grid mold form so as to be able to rotate at an obtuse angle. The grid mold frame (B) is formed so that the top hook portion of the grid mold frame (A) protrudes from the end of the bottom grid section of the grid mold frame (B). The step (5) of placing and placing the grid support grid part of the grid surface on the slope support grid part of the grid form (A) placed on the gentle gradient slope, After laying so that its end is buried in a mountain-height part that is linearly connected in the width direction of the bottom lattice part of the grid form frame (B), a geogrid is inserted by inserting a long connecting rod into that mountain-height part Step (6) for connecting the bottom grid part and the bottom grid part, embankment on the embankment, the bottom grid part and the geogrid, and a gentle gradient method Step (7) of forming the embankment layer of the steel sheet, after rolling the gentle gradient slope part and the upper part of the embankment, rotating the slope support grid part of the grid formwork (B) to newly form the gentle slope slope part A gentle gradient method surface embankment method comprising the step (8) of placing on top . On a bank foundation having a slope, from a bottom grid portion having a mountain-top portion linearly connected in the width direction, and a slope support grid portion connected to the bottom grid mold form so as to be able to rotate at an obtuse angle. Do Ri, lattice type frame that having a hook portion on the grating portion top for slope supporting (a), on its bottom grid portion embankment foundation top, also to slope support trellis portion is placed on the slopes Step (1), placing the geogrid so that the end of the geogrid is buried in the height of the mountain that is linearly connected in the width direction of the bottom grid, and then inserting a long connecting rod into the height of the mountain (2) connecting the geogrid and the bottom grid portion by performing a step (3) for embedding on the embankment foundation, the bottom grid portion and the geogrid to form a fill slope layer of a gentle slope slope, and a gentle slope slope face portion After rolling the upper part of the embankment, rotate the slope support grid part and place it on the gentle slope slope part. Degree (4) on top of the embankment with the formed low-gradient slopes by being pivotally connected to the obtuse angle to the bottom surface grating section and the bottom surface lattice-type frame having a bowler portion continuous with linearly in the width direction Another lattice mold (B) composed of the slope support grid section so that the top hook portion of the grid mold frame (A) protrudes from the end of the bottom grid section of the grid mold frame (B), and A step of placing and placing the slope supporting grid portion of the grid mold (B) so as to overlap the slope supporting grid portion of the grid mold (A) placed on the gentle gradient slope ( 5) After laying the geogrid so that the end of the geogrid is buried in a mountain height that is linearly connected in the width direction of the bottom surface lattice portion of the grid frame (B), a long connecting rod is inserted into the height. (6) connecting the geogrid and the bottom grid part by wearing, above the embankment, the bottom grid part and the geogrid Step (7) of embankment to form a slope layer with a gentle gradient slope, after rolling the gentle slope slope part and the upper part of the bank, rotate the slope support grid part of the grid form (B) A gentle slope slope fill method comprising the step (8) of placing on the slope slope section formed in the above .

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