JP6268698B2 - Protective body and its construction method - Google Patents

Description

  The present invention relates to a protective body in which a support column is erected on an installation surface and a construction method thereof.

  Conventionally, as this type of protection body, protective fences (shields provided with wire nets provided with struts at predetermined intervals, with horizontal rope members between the struts, and between the struts hung on the horizontal rope members) For example, Patent Literature 1), a protective fence in which a horizontal fence made of concrete or metal is provided between the columns, or a protective fence in which the upper part of the column and the slope on the front side of the column are connected by a reed rope material ( For example, Patent Document 2) is known.

  In addition, it relates to a support used as a protective body, a concrete foundation is provided at a set place, and a plurality of support pillars are erected on the foundation (for example, Patent Document 3), a ground part protruding into the air, and an underground One having a strut structure composed of an underground portion that is inserted into and fixed to the base (for example, FIG. 1 of Patent Document 4), and one having a wound concrete portion in the vicinity of the setting surface position of this strut structure (for example, Patent Document 4) FIG. 6) is known.

JP-A-6-173221 Japanese Patent Laid-Open No. 2000-273727 JP 2007-285039 A JP 2009-150131 A

  As in each of the above-mentioned patent documents, in the case where a protective surface such as a net is provided between the columns, falling rocks can be captured by the protective surface. Since the net is stretched throughout, it is not possible to obtain a sufficient effect to stop landslides.

  On the other hand, in Patent Document 3, it is possible to stop sediment collapse with a concrete foundation. However, for this purpose, it is necessary to enlarge the concrete foundation, which causes an increase in construction cost. It is also expected that construction will be difficult due to work restrictions.

  Then, an object of this invention is to provide the protection body which can respond to the earth and sand collapse in the lower part of a support | pillar, and its construction method with a falling rock and avalanche.

The invention of claim 1 includes a column in which a lower column is inserted into the ground of the installation surface with an interval in the left-right direction, and a column in which the upper column is erected on the ground, and a protective surface provided between the columns. in guards, Rutotomoni provided precast concrete wall at the bottom of the strut upper fit Ri next connects the two said posts adjacent this wall, the two provided the post to the wall An inserted through hole, an excavation hole formed in the ground in communication with the through hole and into which the lower portion of the support column is inserted, a filler filled between the lower support column, the excavation hole, and the through hole; With
A joint portion that cuts the edges of the adjacent wall bodies is provided between the side surface portions of the adjacent wall bodies, and a plurality of connecting members are provided between the adjacent wall bodies so as to face the side surface portions of the adjacent wall bodies. A plurality of loose insertion holes are inserted, and both sides of the connecting material are inserted into the loose insertion holes so that adjacent wall bodies are not restrained in the left-right direction, the lower part of the pillar is longer than the upper part of the pillar, The height of the upper part of the column from the upper surface of the wall is higher than the height of the upper surface of the wall from the installation surface.

  According to the above configuration, even if the collapsed earth is received at the lower part of the protective fence, it can be reliably captured. In addition, the wall body is supported by the pillars with the lower part of the pillars fixed to the ground, and the impact force of the earth and sand applied to the wall body can be counteracted, so the impact force of the earth and sand can be dispersed. In this case, since the column has the lower part of the column fixed to the ground, it acts as a support pile.

  With the above configuration, the column can be inserted into the wall body and integrated.

  According to the above configuration, even if the collapsed earth is received at the lower part of the protective fence, it can be reliably captured. In addition, the wall body is supported by a plurality of support columns, and the impact force of earth and sand applied to the wall body can be countered by the wall body and the plurality of support columns, so that the impact force of the earth and sand can be dispersed.

  With the above configuration, since the adjacent wall bodies are connected by the connecting material, it is possible to counteract the impact force of earth and sand applied to the wall bodies by the plurality of wall bodies and the plurality of support columns.

The invention according to claim 2 is the construction method of the protection body for constructing the protection body according to claim 1 , wherein the wall body is installed on the installation surface, and the through-hole having a diameter larger than that of the column is formed on the wall body. The excavation hole is formed in the ground continuously with the through hole, the lower portion of the support column is inserted into the excavation hole, and the support column is interposed between the lower support column, the excavation hole, and the through hole. It is characterized by filling with a filler for fixing.

  With the above configuration, the excavation hole can be easily formed on the basis of the excavation guide hole of the wall body, and a filler is filled between the lower part of the column and the excavation hole and the excavation guide hole so that the excavation hole has a lower part of the column. Can be fixed, and the column and the wall can be integrated.

  Since the pillar which captured the collapsed sediment by the wall body and fixed the lower part of the pillar to the ground acts as a support pile, it is possible to provide a protective body capable of dealing with the earth and sand collapse at the lower part of the pillar together with the falling rock and avalanche.

It is sectional drawing which shows Example 1 of this invention. It is a front view same as the above. It is a top view around the joint part which notched a part same as the above. It is side explanatory drawing same as the above. It is sectional drawing explaining a construction method same as the above, FIG. 5 (A) shows the state which formed the excavation hole, and FIG. 5 (B) shows the state which built the support | pillar. It is sectional drawing which shows the reference example 1 of this invention. It is sectional drawing which shows the reference example 2 of this invention, FIG. 7 (A) shows the state which built the support | pillar, FIG. 7 (B) shows the state which filled the cast-in-place concrete in the formwork, and constructed | assembled the wall body . It is sectional drawing which shows the reference example 3 of this invention, FIG. 8 (A) shows the state which built the support | pillar, FIG. .

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new protective body different from the conventional one, an unprecedented protective body is obtained, and the protective body and its construction method will be described.

  Embodiment 1 of the present invention will be described below with reference to FIGS. As shown in the figure, a protective fence 1 as a protective body is provided with a plurality of support pillars 3, 3... At a predetermined interval on a substantially horizontal and substantially flat ground 2 as an installation surface. The support lower part 3K is inserted into the ground of the ground 2, and the support upper part 3J of the support 3 is erected on the ground. A wall body 4 is provided at the lower portion of the upper column 3J, and the wall 4 is provided so as to connect the plurality of columns 3 and 3. In addition, a drilling hole 5 is formed in the ground 2 corresponding to the position of the pillar 3, and the solidifying filler 6 is filled in the drilling hole 5 with the pillar lower part 3 </ b> K inserted in the drilling hole 5. The filler 6 is solidified to fix the lower column 3K to the excavation hole 5, and examples of the filler 6 include mortar. In this example, the lower column 3K is longer than the upper column 3J.

  In this example, the wall body 4 is made of precast concrete, and connects the two columns 3 and 3. The wall body 4 includes a front surface portion 4F, a rear surface portion 4B, left and right side surface portions 4S and 4S, an upper surface portion 4U, and a lower surface portion 4K. A vertical through-hole 11 is formed at a position, and the through-hole 11 is an excavation guide hole, and a plurality (two in this example) are provided. And the diameter of this through-hole 11 is formed larger than the diameter of the said excavation hole 5, and the through-hole 11 becomes a guide part of excavation apparatuses (not shown), such as a drill when excavating the excavation hole 5.

  The wall body 4 includes reinforcing bars 12 and 12A, and the frame-like reinforcing bars 12 arranged along the inner sides of the front surface part 4F, the rear surface part 4B, the upper surface part 4U and the lower surface part 4K, A plurality of reinforcing bars 12A arranged in the length direction are arranged. The frame-shaped reinforcing bar 12 is called a stirrup.

  A base portion 13 is provided on the ground 2, and the base portion 13 is made of precast concrete or cast-in-place concrete, and an upper surface portion 13J is formed on a substantially horizontal flat surface. In this example, the upper surface portion 13J is arranged so as to be substantially flush with the ground surface 2. Thus, the base part 13 is provided in order to make the upper surface part 13J which is a mounting surface on which the wall body 4 is mounted substantially flat and horizontal. The base portion 13 is formed with a through portion 13S communicating with the through hole 11. The through portion 13S is formed in a hole, but if it is larger than the through hole 11, it does not need to be formed in the hole, and the base portion 13 in the through hole 11 may not be provided. .

  Furthermore, the joint part 14 is provided in the side surface parts 4S and 4S of the wall bodies 4 and 4 adjacent in the left-right direction, and the edge of the wall bodies 4 and 4 adjacent to this joint part 14 is cut. Further, a plurality of loose insertion holes 15, 15 are formed facing the adjacent side surface portions 4S, 4S, and both sides of a steel rod 16 as a connecting material are inserted into the loose insertion holes 15, 15, respectively. In this case, at least one end of the steel bar 16 is preferably provided without being fixed to the wall body 4. By arranging the plurality of steel bars 16 on the joint portions 14 of the adjacent walls 4 and 4 in this way, the adjacent walls 4 and 4 are not constrained to each other in the left-right direction and are integrated in the front-rear direction. The

  Further, a net 17 serving as a protective surface is stretched between the upper portions 3J, 3J. In addition, you may comprise a protective surface combining the net body 17 with the horizontal rope material which is not shown in figure.

  Further, the protective fence 1 has a front surface portion 4F located on the mountain slope M side, and the mesh body 17 is disposed on the anti-mountain side of the column 3.

  The height H of the upper surface portion 4J of the wall body 4 from the ground 2 is set to a height corresponding to the expected thickness of the collapsed sediment on the slope M. In addition, the height H of the support | pillar upper part 3J from the upper surface part 4J is higher.

  The height H is equal to or greater than the expected thickness of the collapsed sediment on the slope M.

  Next, an example of a construction method for constructing the protective fence 1 will be described. First, the base portion 13 is formed by the cast-in-place concrete so that the upper surface portion 13J is horizontal, and this base portion 13 is formed in substantially the entire length in the left-right direction of the protective fence 1, and on the base portion 13, the wall body 4, 4 are placed and arranged, and adjacent wall bodies 4 and 4 are connected to each other by a plurality of steel bars 16, 16. In this case, the wall body 4 is arranged by aligning the through holes 11 and 11 of the wall body 4 with the planned positions of the excavation holes 5 and 5.

In addition, you may construct | assemble the wall 4 which has the through-hole 11 by a cast-in-place concrete, In this case, what is necessary is just to construct the steel bar 16 like the reference example 3 mentioned later.

  After installing the wall body 4 in this way, the tip of the excavator is aligned with the through-hole 11, and the ground below the through-hole 11 is excavated. As shown in FIG. The excavation hole 5 is formed. Then, the column lower part 3K of the column 3 suspended on the ground is inserted into the excavation hole 5 through the through hole 11 and the through part 13S, and the column 3 is positioned in the inserted state, as shown in FIG. The excavation hole 5, the through portion 13 </ b> S, and the through hole 11 are filled with the filler 6.

  Then, as the filler 6 is solidified, the support lower part 3K is fixed in the ground, the lower part of the support upper part 3J is fixed to the wall body 4, and the support pillar 3 is inserted into the insertion hole 11A in the wall body 4, A strut structure in which a strut upper portion 3J is erected on the top of the wall body 4 is obtained. A net 17 is stretched between the upper portions 3J and 3J of the columns.

  In the guard fence 1 constructed in this way, since the lower part of the ground part of the guard fence 1 is constituted by the wall body 4, even if the lower part of the guard fence 1 receives collapsed earth and sand, this is surely ensured. Can be captured. In addition, the wall body 4 is supported by the plurality of support columns 3 and 3 and the adjacent wall bodies 4 and 4 are connected by the steel rod 16, so that the impact force of earth and sand applied to the front surface portion 4F of the wall body 4 is increased. On the other hand, since it can counter by several wall body 4,4 ... and several support | pillar 3,3 ..., the impact force of earth and sand can be disperse | distributed. In this case, since the column 3 fixes the column lower portion 3K in the ground, it functions as a support pile.

  Moreover, rock fall can be captured by the wall body 4 and the upper net body 17, and the impact force of the fall rock can be dispersed in the protective fence 1 in the same manner as the earth and sand. It is done.

Thus, in this embodiment, in response to 請 Motomeko 1, strut standing strut upper 3J on the ground with inserting a strut lower 3K in the ground of the installation surface serving ground 2 spaced in the lateral direction 3, a protective surface serving mesh member 17 provided between them posts 3,3, in protective body having a neighbor Ri fit strut upper 3J, a concrete wall body 4 is hard material at the bottom of the 3J provided In addition, two adjacent pillars 3 and 3 are connected by the wall body 4, two through holes 11 provided in the wall body 4 are inserted through the pillars 3 and 3, and the through hole 11 communicates with the ground. A side wall of the adjacent wall bodies 4 and 4 , which is provided with an excavation hole 5 formed therein and into which the lower column 3K is inserted, and a filler 6 filled between the lower column 3K and the excavation hole 5 and the insertion hole 11A. A joint portion 14 that cuts the edges of the adjacent walls 4 and 4 is provided between 4S and 4S. A plurality of steel rods 16 as connecting members are provided between the matching wall bodies 4, 4, and a plurality of loose insertion holes 15, 15 are formed facing the side surface parts 4 S, 4 S of the adjacent wall bodies 4, 4 and adjacent to each other. Both sides of the steel rod 16 are inserted into the loose insertion holes 15 and 15 so that the wall bodies 4 and 4 are not restrained in the left-right direction, the column lower part 3K is longer than the column upper part 3J, and from the upper surface part 4J of the wall body 4 Since the height of the upper part 3J of the column is higher than the height of the upper surface part 4J of the wall body 4 from the ground 2, even if the lower part of the protective fence 1 receives collapsed earth and sand, it can be reliably captured. Moreover, since the wall body 4 is supported by the support | pillar 3 which fixed the support | pillar lower part 3K in the ground, and it can oppose the impact force of the earth and sand added to the wall body 4, the impact force of the earth and sand can be disperse | distributed. In this case, since the column 3 fixes the column lower portion 3K in the ground, it functions as a support pile.

  In this way, in this embodiment, since the support column 3 is inserted into the wall body 4 in correspondence with claims 1 and 2, the support column 3 can be inserted into the wall body 4 and integrated.

In this way, in this embodiment , corresponding to claim 1, even when the collapsed earth and sand are received at the lower part of the protective fence 1, this can be reliably captured. Moreover, since the wall body 4 is supported by the plurality of support columns 3 and 3 and can counteract the impact force of the earth and sand applied to the wall body 4 by the wall body 4 and the plurality of support columns 3 and 3, The power can be distributed.

In this way, in this embodiment, corresponding to claim 1 , the joint portion 14 is provided between the adjacent wall bodies 4, 4, and the steel rod 16 serving as a connecting material is provided between the adjacent wall bodies 4, 4. Since the adjacent wall bodies 4 and 4 are connected by the steel rod 16, the plurality of wall bodies 4 and 4 and the plurality of support columns 3 and 3 counteract the impact force of the earth and sand applied to the wall body 4. Can do.

In this way, in this embodiment, corresponding to claim 2 , in the construction method of the protective body for constructing the protective fence 1 as the protective body according to claim 1 , the wall body 4 is installed on the ground 2 as the installation surface. The wall 4 is provided with a through-hole 11 that is a drilling guide hole having a diameter larger than that of the support 3, and a drilling hole 5 is formed in the ground continuously from the through-hole 11. The filler 6 is inserted between the lower portion 3 </ b> K of the support column and the excavation hole 5 and the through hole 11 to fix the support column 3. The filler 6 is filled between the lower column 3K and the excavation hole 5 and the through hole 11, and the lower column 3K is fixed to the excavation hole 5, and the column 3 and the wall body 4 are connected to each other. Can be integrated.

In correspondence to claim 1, since the wall 4 is made of precast concrete, which facilitates installation work at the site. Moreover, since the support | pillar lower part 3K is longer than the support | pillar upper part 3J, the support | pillar 3 has a support pile and big proof stress. Further, as an effect of the embodiment, the height H of the upper surface portion 4J of the wall body 4 from the ground 2 is set to a height corresponding to the expected thickness of the collapsed sediment on the slope M. Sediment can be reliably captured.
[Reference Example 1]

  FIG. 6 shows Reference Example 1 of the present invention, in which the same reference numerals are assigned to the same parts as in Example 1 and detailed description thereof is omitted. As shown in the figure, using an example in which the column lower part 3K is shorter than that in Example 1, a base pipe 21 having a smaller diameter than the drilling hole 5 and a larger diameter than the column lower part 3K is inserted into the excavation hole 5; A steel pipe or the like is used as the foundation pipe 21, and the excavation hole 5, the foundation pipe 21 and the column lower part 3K are arranged concentrically.

  Next, an example of a construction method for constructing the protective fence 1 will be described.

  First, the base portion 13 is formed, and the wall bodies 4, 4,... Are placed and arranged on the base portion 13, and the adjacent wall bodies 4, 4 are arranged with a plurality of steel bars 16, 16,.・ Connect by

  In addition, you may construct | assemble the wall 4 which has the through-hole 11 with a cast-in-place concrete, In this case, what is necessary is just to construct the steel bar 16 like Example 4 mentioned later.

  After installing the wall body 4, the tip of the excavator is aligned with the through-hole 11, and the ground below the through-hole 11 is excavated to form an excavation hole 5 having a smaller diameter than the through-hole 11. The basic tube 21 is arranged. Then, the column lower part 3K of the column 3 suspended on the ground is inserted into the foundation pipe 21 through the through hole 11 and the loose insertion hole 15, and the column 3 is positioned in the inserted state, and the excavation hole 5, the foundation tube 21, The filler 6 is filled into the insertion hole 15 and the through hole 11.

  As the filler 6 is solidified, the lower column 3K is fixed in the ground, the lower portion of the upper column 3J is fixed to the wall 4, and the upper column 3J is erected above the wall 4. A strut structure is obtained. A net 17 is stretched between the upper portions 3J and 3J of the columns.

  As described above, in this reference example, the same operations and effects as those of the first embodiment are obtained.

  Further, in this reference example, the foundation pipe 21 is inserted into the excavation hole 5, the support lower part 3 </ b> K is inserted into the foundation pipe 21, and the support 3 is inserted between the support lower part 3 </ b> K and the excavation hole 5 and the through hole 11. Since the filler 6 for fixing is filled, the length of the column 3 to be used can be suppressed by integrating the column lower part 3K and the base tube 21 with the filler 6, and transportation and installation work can be performed. It becomes easy.

Further, as an effect on the reference example, a foundation pipe 21 having a diameter smaller than that of the excavation hole 5 and larger than that of the support lower part 3K is inserted into the excavation hole 5, and the support lower part 3K is inserted and disposed in the foundation pipe 21. Therefore, the length dimension of the support column 3 can be suppressed, and the transportation and installation of the support column 3 are facilitated.
[Reference Example 2 ]

FIG. 7 shows a reference example 2 of the present invention, in which the same reference numerals are given to the same parts as those in the above-described embodiment and reference example, and detailed description thereof will be omitted. The figure shows an example in which the wall body 4 is constructed by in-situ concrete. The formwork is assembled, the concrete is placed in the formwork, and after the concrete is solidified, the formwork is removed and the wall body 4 is constructed. . In addition, an iron plate or a precast concrete plate is used as the mold plate 22 in the mold, and the mold plate 22 is integrally provided on the front surface portion 4F and the rear surface portion 4B.

  Next, an example of a construction method for constructing the protective fence 1 will be described.

  First, the drilling hole 5 is formed by a drilling device, and the pillar lower portion 3K is inserted into the drilling hole 5, and then the filler 6 is filled into the drilling hole 5, and after the filler 6 is cured, The formwork plates 22 and 22 for the wall body 4 are assembled, the reinforcing bars 12 and 12A are arranged in the formwork plates 22 and 22, and a filling material 6A such as cast-in-place concrete is filled between the formwork plates 22 and 22. By doing so, the wall body 4 provided with the formwork plates 22 and 22 is constructed. In this case, the wall body 4 may be constructed without providing the joint portion 14, or the joint portion 14 may be provided between the wall bodies 4 and 4. In this case, while constructing one of the adjacent wall bodies 4, 4 first, the wall body 4 is provided with a loose insertion hole 15, and one end of the steel rod 16 is inserted into the loose insertion hole 15 in a non-fixed state, Then, the steel rod 16 is arrange | positioned between the adjacent wall bodies 4 and 4 by constructing the other of the adjacent wall bodies 4 and 4.

As described above, in this reference example, the same operations and effects as the above-described embodiment and reference example are exhibited.

Moreover, in this reference example, the wall body 4 united with the formwork board 22 can be constructed by a filler 6A such as cast-in-place concrete. Furthermore, the wall body 4 can be formed continuously without providing joint portions.
[Reference Example 3 ]

FIG. 8 shows a reference example 3 of the present invention, in which the same reference numerals are given to the same parts as those in the above-described embodiment and reference example, and detailed description thereof is omitted. The figure shows an example in which the wall body 4 is constructed of cast-in-place concrete, and the column lower portion 3K is shorter than that of the first embodiment. The excavation hole 5 has a diameter smaller than that of the excavation hole 5 and from the column lower portion 3K. A large-diameter foundation pipe 21 is inserted, and a steel pipe or the like is used as the foundation pipe 21, and the excavation holes 5, the foundation pipe 21 and the column lower part 3K are arranged concentrically.

  Next, an example of a construction method for constructing the protective fence 1 will be described.

  First, the excavation hole 5 is formed by a drilling device, the foundation pipe 21 is inserted into the excavation hole 5, and the pillar lower part 3 </ b> K is inserted into the foundation pipe 21, and then the excavation hole 5 and the foundation pipe 21 are inserted. After the filler 6 is filled and the filler 6 is hardened, the mold plates 22 and 22 for the wall 4 are assembled on the ground, and the reinforcing bars 12 and 12A are arranged in the mold plates 22 and 22. The wall body 4 in which the mold plates 22 and 22 are integrated is constructed by filling a filler 6A such as cast-in-place concrete. In this case, the wall body 4 may be constructed without providing the joint portion 14, or the joint portion 14 may be provided between the wall bodies 4 and 4. In this case, while constructing one of the adjacent wall bodies 4, 4 first, the wall body 4 is provided with a loose insertion hole 15, and one end of the steel rod 16 is inserted into the loose insertion hole 15 in a non-fixed state, Then, the steel rod 16 is arrange | positioned between the adjacent wall bodies 4 and 4 by constructing the other of the adjacent wall bodies 4 and 4.

As described above, in this reference example, the same operations and effects as the above-described embodiment and reference example are exhibited.

In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, in the reference example, a form plate provided integrally with the cast-in-place concrete is used, but a mold plate to be removed after the cast-in-place concrete is cured may be used.

1 Guard fence (protector)
2 Ground (installation surface)
3 Column 3K Column 3J Column Column 4 Wall 4J Top
4S Side face part 5 Drilling hole 6 Filler 11 Through hole (excavation guide hole)
11A insertion hole
15 Free insertion hole 16 Steel rod (connecting material)
17 Net (protective surface)
21 Basic pipe

Claims (2)

In a protector equipped with a support column in which the lower part of the support column is inserted into the ground of the installation surface with a space in the left and right direction and the support column is provided on the ground, and a protective surface provided between the support columns,
Next Ri fits the strut top of Rutotomoni provided precast concrete wall at the bottom, two said posts adjacent this wall are connected,
Two through-holes provided in the wall body and through which the column is inserted, a drilling hole that is formed in the ground and that is inserted in the ground and is connected to the through-hole, a lower portion of the column, the drilling hole, and the through hole A filler filled between the holes,
While providing joints that cut the edges of these adjacent wall bodies between the side surfaces of the adjacent wall bodies, and providing a plurality of connecting materials between the adjacent wall bodies,
A plurality of loose insertion holes are formed opposite to the side portions of the adjacent wall bodies, and both sides of the connecting material are inserted into the loose insertion holes so that the adjacent wall bodies are not restrained in the left-right direction,
The lower part of the column is longer than the upper part of the column,
The protective body, wherein a height of the upper portion of the column from the upper surface portion of the wall body is higher than a height from an installation surface of the upper surface portion of the wall body. The construction method of the protective body for constructing the protective body according to claim 1 , wherein the wall body is installed on the installation surface, the through-hole having a diameter larger than that of the support is provided in the wall body, and the through-hole is continuously provided. Forming the excavation hole in the ground, inserting the lower portion of the support pillar into the excavation hole, and fixing the support material between the lower portion of the support strut and the excavation hole and the through hole. The construction method of the protective body characterized by filling.

Images