JP5211010B2 - Vertical collapse prevention structure - Google Patents

Description

  The present invention relates to a ground structure that prevents collapse of a vertical surface.

  Conventionally, as a ground structure for preventing the collapse of a slope, a method of embedding a concrete block along the slope or a method of solidifying the ground surface with concrete has been adopted. In addition, as shown in Patent Document 1 or 2 below, for the purpose of greening promotion and aesthetic improvement, earth retaining fences with lattice reinforcing bars are embedded on the slope, and plants are propagated using vegetation sheets and vegetation nets, A method of consolidation with plant roots is used.

  However, the prevention of slope collapse by the concrete block as described above has a drawback that the construction is heavy using a heavy machine because the concrete block is heavy. In addition, in the method of retaining soil by vegetation on an inclined surface, the landscape is good and there is an advantage that greening is promoted, but there is a possibility that sediment will flow out by running water such as rainwater, and vegetation failure and Measures of weed overgrowth may occur due to excessive vegetation, and it was necessary to take protective measures.

  Therefore, in order to solve the above-mentioned problems, the applicant has proposed the invention of the “slope collapse prevention structure” specified in Japanese Patent Application No. 2008-203523, and the invention is basically a slope collapse prevention structure using a concrete block. However, the purpose of providing a structure that prevents the collapse of the slope by reducing the weight and size of the concrete block and enabling construction without using heavy machinery has been achieved.

JP 2002-121742 A JP 2002-88766 A

  However, for the slope, the above-described “slope collapse prevention structure” solves the above problem, but it has become necessary to perform construction without using heavy equipment even for a collapse on a vertical surface.

  The present invention has been made in view of the above circumstances, and is basically a vertical surface collapse prevention structure using a concrete block. However, the concrete block can be reduced in weight and size, and can be constructed without using heavy machinery. An object is to provide a structure for preventing vertical surface collapse.

  The vertical surface collapse prevention structure according to the present invention is a vertical surface collapse prevention structure in which a pseudo stone panel is juxtaposed on a vertical surface, and a steel wall material is connected and fixed to the pseudo stone panel. Each unit has a weight of about 60 kg or less, and is composed of a back plate and a plurality of hard materials integrally formed on the back plate, for example, a pseudo stone made of concrete or the like, and each pseudo stone crosses linearly. The steel wall surface material is composed of grid reinforcing bars arranged in a grid pattern so as to fit into the grid-shaped concave grooves of the pseudo stone panel. . In addition, as the size of one unit when the pseudo stone is made of concrete, for example, a width of 1 m or less, a height of 60 cm or less, and a thickness of 10 cm or less can be considered.

  In the above-mentioned configuration, the steel wall surface material includes a horizontal frame located in the soil at the lower end thereof and stands upright with respect to the horizontal frame, and a holding reinforcing bar is disposed on the steel wall surface material. In addition, a support shaft that fixes the standing state of the steel wall material by connecting the holding reinforcing bar and the horizontal frame may be provided.

  The vertical surface collapsing prevention structure according to the present invention is configured as described above, so that the pseudo stone panel is lightweight, so it can be handled and installed by up to two people, and it is necessary to use heavy machinery. There is no. In addition, since the grid-like concave grooves of the pseudo stone panel are fitted and fixed to the steel wall material made of the grid-like reinforcing bars, there is no possibility of being easily detached from the vertical plane. Moreover, since the state where the pseudo stone is spread on the surface of the vertical surface is exhibited, there is an advantage that the landscape is good. When a structure including a horizontal frame, a holding reinforcing bar, and a support shaft is used, there is an advantage that the fixation becomes strong.

It is a front view of 1 unit of the pseudo stone panel used for the vertical surface collapse prevention structure which concerns on Example 1. FIG. 1 is a perspective view of a unit of a pseudo stone panel used in a vertical surface collapse prevention structure according to Example 1. FIG. It is a perspective view of the steel wall surface material used for the vertical surface collapsing prevention structure which concerns on Example 1. FIG. It is the perspective view which represented the state which attached the pseudo stone panel to the steel wall surface material used for the vertical surface collapse prevention structure which concerns on Example 1 from the surface side. It is the perspective view which represented the state shown in FIG. 4 from the back side. In the state shown in FIG.4 and FIG.5, it is the perspective view which represented the state which provided the support shaft from the surface side. It is the perspective view which represented the state shown in FIG. 6 from the back side. In the state shown in FIG. 6, it is a side view which shows the state which attached the earth and sand outflow prevention material and thrown in earth and sand. It is a perspective view which shows the state which made the steel wall surface material which attached the pseudo stone panel used for the vertical surface collapsing prevention structure which concerns on Example 1 into the 2 step | paragraph structure. FIG. 10 is a side view of the state shown in FIG. 9. It is the perspective view which represented the state which provided the support shaft in the state which attached the pseudo stone panel to the steel wall surface material used for the vertical surface collapse prevention structure which concerns on Example 2 from the back side. In the state shown in FIG. 11, it is a side view which shows the state which attached the earth and sand outflow prevention material, and thrown in earth and sand. It is a construction example of the vertical surface collapsing prevention structure which concerns on Example 3, Comprising: It is a schematic sectional drawing inside the bank of a bank body in a construction completion state. It is a fragmentary perspective view which shows an embankment waterway. It is the fragmentary perspective view which represented the state which stood the steel wall surface material on the bank body edge part between the bank body edge part and the bank pier waterway inside a bank from the back side. It is the fragmentary perspective view showing the state which inserts a pseudo stone panel in steel wall materials from the surface side. It is the fragmentary perspective view which represented the state which inserted the pseudo stone panel in the steel wall material, and was supported by the support shaft from the back side. FIG. 18 is a partial perspective view showing a state in which earth and sand are put on the back side horizontal frame of the pseudo stone panel in the state shown in FIG. 17. FIG. 19 is a partial perspective view illustrating a state where the earth and sand have been thrown into the back side horizontal frame of the pseudo stone panel from the state illustrated in FIG. In the state shown in FIG. 19, it is a partial perspective view which shows the completed state which piled up the embankment on the leveling and laid the lawn. It is the fragmentary perspective view which looked at the completion state shown in FIG. 20 from the surface side.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  1 to 10 relate to the first embodiment.

  A shown in FIGS. 1 and 2 is a pseudo stone panel, which is used by being connected to the steel wall material B shown in FIG. The pseudo stone panel A has a width of 400 mm, a height of 580 mm, a thickness of 50 mm, a weight of about 18 kg, and is made of concrete in which a plurality of pseudo stones 2 having a height of 30 mm are integrally formed on a back plate 1 having a thickness of 20 mm. Is. This pseudo stone is a concrete that is shaped like stone. The pseudo stone is not limited to concrete but may be a hard material such as a hard resin. In that case, the size can be increased even with the same weight as compared with the concrete one. Moreover, it is preferable to use what mixed the fiber for reinforcement | strengthening. Further, the size and weight of the pseudo stone panel A are not limited to those described above, but may be within a range that can be carried by human power having a width of 300 mm to 500 mm, a height of 400 mm to 600 mm, a thickness of 40 mm to 70 mm, and a weight of 15 kg to 25 kg. That's fine.

  The pseudo stones 2 are partitioned by lattice-shaped grooves 3 that intersect vertically and horizontally in a straight line, and are arranged vertically and horizontally with 6 rows and 6 columns as one unit. In the pseudo stone panel A, notches 4 for connecting and fixing the steel wall plate B are formed at the boundaries of the first to fourth stages and the boundaries of the fifth and sixth stages from the bottom. Yes. In addition, the pseudo stone panel A is formed with three cutout holes 5 in the second stage from the top, so that a support shaft to be described later can be inserted. In the second stage, the pseudo stone is half-cut. A laterally wide groove 6 formed as described above is provided, and is configured such that a presser bar which will be described later for connecting to the support shaft can be attached. The notch hole 4 for connecting and fixing the steel wall plate B and the notch hole 5 into which the support shaft can be inserted are not limited to the above arrangement.

  As shown in FIG. 3, the steel wall material B has a lattice shape in which longitudinal reinforcing bars 10 and transverse reinforcing bars 11 are arranged in a lattice pattern so as to be fitted in the lattice-shaped concave grooves 3 of the pseudo stone panel A. It consists of reinforcing bars. Further, the steel wall surface material B includes a horizontal frame 12 located in the soil at the lower end thereof, and the steel wall surface material B stands vertically with respect to the horizontal frame. The horizontal frame 12 includes a vertical horizontal reinforcing bar 13 formed by bending a vertical reinforcing bar 10 constituting the steel wall material B and extending in the horizontal direction, and a horizontal horizontal reinforcing bar 14 connecting the vertical horizontal reinforcing bar 13. And is formed by. In addition, this horizontal frame 12 can be extended and connected suitably according to the situation of the field which forms a vertical surface.

  4 and 5 show a connection structure between the pseudo stone panel A and the steel wall material B. FIG. First, the steel wall material B is erected, and one unit of pseudo stone panel A is fitted so that the lattice reinforcing bars of the steel wall material B and the lattice concave grooves 3 of the pseudo stone panel A are fitted and fixed. Fix with the tool 20. The connecting fixture 20 includes a shaft member 23 including a hook portion 21 whose tip is bent like a hook and a threaded base portion 22, a washer 24, and a nut 25 attached to the base portion 22. In order to connect and fix the pseudo stone panel A to the steel wall surface material B by the connection fixture 20, the hook portion 21 is hooked on the vertical reinforcing bar 10 (the horizontal reinforcing bar 11 is also acceptable) of the steel wall surface material B. By projecting the base portion 22 to the back side of the pseudo stone panel A, inserting the washer 24 into the base portion 22 and tightening the nut 25 together, the steel wall material B and the pseudo stone panel A are connected to the hook portion 21 and the washer 24. And the nut 25 is firmly sandwiched and connected and fixed.

  6 to 8 show a fixing structure of the steel wall surface material B to which the pseudo stone panel A is connected and fixed and the horizontal frame 12 which is a part of the steel wall surface material B. FIG. Since earth and sand are put into the back side of the pseudo stone panel A, a load is applied to the horizontal frame 12 in a direction in which the pseudo stone panel A falls to the outside due to the weight. In order to hold this load, the linear support shaft 30 is bridged. That is, as shown in FIG. 6, the longitudinal direction of the steel wall material B is formed in the portion of the lateral wide groove 6 formed by half-cutting the pseudostone 2 with respect to the steel wall material B to which the pseudostone panel A is connected and fixed. The presser reinforcing bar 31 is bridged so as to straddle the reinforcing bar 10, and the presser reinforcing bar 31 is inserted into the annular end 30 a formed at one end of the linear support shaft 30. As shown in FIG. 7, an annular end portion formed at the other end portion of the support shaft 30 by disposing a locking rebar 33 so as to dive under the convex portion 32 formed at a part of the horizontal frame 12. By inserting the fixing reinforcing bars 33 into 30b and fixing them, the support shaft 30 prevents the pseudo-stone panel A from expanding due to earth and sand and tilting outward. In addition, as shown in FIG. 8, before introducing the earth and sand C to the back side of the pseudo stone panel A, various water-permeable sheets 40 are disposed on the back side of the pseudo stone panel A as an earth and sand outflow prevention material. By comprising in this way, since only water | moisture content, such as rain water, flows out and earth and sand do not flow out from the pseudolite panel A, the vertical surface collapse by flowing water can be prevented.

  Next, a construction method of the vertical surface collapse prevention structure will be described. First, a pseudo stone panel A integrated with the back plate 1 is formed by partitioning and arranging a plurality of concrete pseudo stones 2 on the back plate 1 by lattice-shaped concave grooves 3 intersecting linearly. Further, a steel wall material B made of grid-like reinforcing bars 10 and 11 arranged in a grid so as to be fitted into the grid-like concave grooves 3 of the pseudo stone panel A is formed. And the horizontal frame 12 is mounted in the horizontal ground which is going to form a vertical surface, and the steel wall surface material B is standingly arranged. Next, the lattice-like reinforcing bars 10 and 11 constituting the steel wall material B are fitted into the lattice-shaped concave grooves 3 of the pseudo stone panel A, and the steel wall material B and the pseudo stone panel A are connected and fixed by the connector 20. Then, the presser reinforcing bar 31 is arranged on the steel wall material B, and the presser reinforcing bar 31 and the horizontal frame 12 are connected by the support shaft 30 to fix and support the standing state of the steel wall material B. Next, a water-permeable sheet 40, which is an earth and sand outflow prevention material, is disposed and fixed on the entire back surface of the pseudo stone panel A, and the earth and sand C is placed on the horizontal frame 12 placed on the horizontal ground. By filling up, the vertical surface collapse prevention structure shown in FIG. 8 is completed.

  9 and 10 show a structure in which the above vertical surface collapse prevention structure is stacked in two stages. That is, the horizontal frame 12 ′ is placed on the horizontal ground formed by the earth and sand C in the vertical surface collapse prevention structure formed by the above-described method, and the steel wall material B ′ is erected, and the steel wall material B The lattice-like reinforcing bars 10 'and 11' constituting 'are fitted to the pseudo stone panel A', the steel wall material B 'and the pseudo stone panel A' are connected and fixed by the connecting tool 20 ', and the steel wall material B'. A holding rebar 31 'is arranged on the upper side, the holding rebar 31' and the horizontal frame 12 'are connected by a support shaft 30', and the standing state of the steel wall material B 'is fixedly supported, and the pseudo stone panel A' Sediment prevention material 40 'is disposed and fixed on the entire back surface of the earth, and on the horizontal frame 12' placed on the horizontal ground, earth and sand C 'is introduced to the upper end of the pseudo stone panel A' to collapse the vertical surface of the second stage. Form a prevention structure.

  11 and 12 relate to the second embodiment.

  The present embodiment is a modification example of the support shaft, and the other configuration is the same as that of the first embodiment. That is, FIG.11 and FIG.12 shows the fixation structure of the horizontal wall 12 which is a part of steel wall surface material B which connected and fixed the pseudo stone panel A, and the steel wall surface material B. FIG. Since earth and sand are put into the back side of the pseudo stone panel A, a load is applied to the horizontal frame 12 in a direction in which the pseudo stone panel A falls to the outside due to the weight. In order to withstand this load, the support shaft 130 bent in a dogleg shape is bridged. That is, as shown in FIG. 6 in the first embodiment, the steel wall surface B is formed on the portion of the horizontal wide groove 6 formed by cutting the pseudo stone 2 in half with respect to the steel wall material B to which the pseudo stone panel A is connected and fixed. As shown in FIG. 11, the holding rebar 31 is bridged over the annular end portion 130 a formed at one end of the U-shaped support shaft 130, while spanning the holding rebar 31 so as to straddle the longitudinal rebar 10 of the material B. 31 is inserted. Further, as shown in FIGS. 11 and 12, an appropriate lateral reinforcing bar 133 of the horizontal frame 12 is inserted and fixed to an annular end portion 130b formed at the other end portion of the U-shaped support shaft 130. Thus, the support shaft 130 prevents the pseudo-stone panel A from expanding due to earth and sand and tilting outward. In addition, as shown in FIG. 12, before introducing the earth and sand C to the back surface side of the pseudo stone panel A, various water-permeable sheets 40 are disposed on the back surface of the pseudo stone panel A as an earth and sand outflow prevention material. By comprising in this way, since only water | moisture content, such as rain water, flows out and earth and sand do not flow out from the pseudolite panel A, the inclined surface collapse by flowing water can be prevented.

  FIGS. 13-21 is related with Example 3, and a present Example shows the construction example of the vertical surface collapsing prevention structure in a dam body.

  In FIG. 13, D shows the inside of the levee body, E is a sucking prevention material made of a nonwoven fabric, and the sucking prevention material E encloses earth and sand F such as single-grain crushed stone in the embankment embankment D1. A drain G is formed. In the drawing of the drain G, a steel wall material B ″ and a pseudolite panel A ″ are installed at the dam body end D2 which is the end of the right horizontal portion. An upper opening type U-shaped side groove H, which is a dike channel, is arranged outside the dam body end D2, and liquids such as rain water and immersion water collected in the drain G are attached to the pseudo stone panel A ″. It passes through the U-shaped side groove H and is configured to be drained. The form of the drain in which the upper opening type U-shaped side groove H is installed is generally called an open water channel. Note that the dike channel is not limited to the U-shaped side groove, and a generally used side groove can also be applied. Further, the form of the drain is not limited to the above-described one shown in FIG. 4, and a structure in which a U-shaped side gutter having a water permeability on one side is installed as a dike channel and water is drained from the lower part of the drain, generally called a closed channel type. It is a structure in which a culvert drainage pipe is installed as a form and a dike channel, and is also applicable to a commonly used drain form such as a form in which drainage is performed inside the drain.

  14 to 21 show an example of the construction procedure. In addition, this construction procedure can also be applied to construction for protecting the edge of the embankment in the site. As shown in FIG. 14, first, the U-shaped side groove H is arranged so that the soil surface D3 and the top H1 at the bottom inside the bank body are flush with each other. Next, as shown in FIG. 15, a steel wall surface in which a suction prevention material E is laid on the left levee soil surface D3 in the figure of the U-shaped side groove H, and a horizontal frame 212 is provided on the suction prevention material E. The material B ″ is placed with its vertical surface facing the U-shaped side groove H side. Then, from the back side of the steel wall surface material B ″, that is, from the side of the bank body, as shown in FIG. 16, the pseudo stone panel A ″ is fitted and fixed, and the horizontal frame 212 is supported by the support shaft 230 as shown in FIG. And the steel wall material B '' are connected to support the steel wall material B ''. As a result, the pseudo stone panel A ″ is stably erected vertically. In addition, the installation of the steel wall surface material B ″ to the fixation of the pseudo stone panel A ″ and the fixation of the steel wall surface material B ″ by the support shaft 230 are the same as described in the first embodiment.

  Then, on the horizontal frame 212 provided on the steel wall surface material B ″, that is, on the suction preventing material E, as shown in FIG. 18, the earth and sand F constituting the drain G are introduced, and as shown in FIG. Then, the earth and sand F that has been thrown in is rolled and leveled. Thereby, the drain G is completed. A non-illustrated material for preventing sucking is laid on the ground soil F that has been leveled, and then, as shown in FIGS. 20 and 21, the embankment D <b> 1 is piled up and the surface of the embankment D <b> 1 is covered with grass, and the vertical surface collapses. The prevention structure is completed.

  The vertical surface collapse prevention structure according to the present invention can be used to prevent collapse on the vertical slope, as well as protection of the bank edge at the inner side of the bank and protection of the bank edge at the site of construction. .

A ... Pseudostone panel A '... Pseudostone panel B ... Steel wall material B' ... Steel wall material C ... Earth and sand 1 .... Back plate 2 .... Pseudo-stones 3 ································ Notched holes for connecting and fixing steel wall material 5 ···························································· Reinforcing bar 10 '·· Vertical reinforcing bar 11 ··· Horizontal reinforcing bar 11' ·· Horizontal reinforcing bar 12 ··· Horizontal frame 12 '·· Horizontal frame 13 ··· Vertical horizontal reinforcing bar 14 ··・ Horizontal horizontal reinforcing bar 20 ・ ・ ・ Connection fixture 20 ′ ・ ・ Connection fixture 21 ... Hook part 22 ... Base 23 ... Shaft material 24 ... Washer 25 ... Nut 30 ... Support shaft 30a ··· Ring end 30b ··· Ring end 31 ··· Reinforcing bar 31 '··· Retaining bar 32 ··· Convex portion 33 ··· Reinforcing bar 40 ... Permeable sheet 40 '... Permeable sheet 130 ... Support shaft 130a / Annular end part 130b / Annular end part 133 ... Horizontal bar of horizontal frame A''... Pseudo stone panel B''··· Steel wall material D ··· Dike inner wall D1 · · · Embankment embankment D2 · · · Embankment edge D3 · · · Levee body surface E · · · Suction prevention material F ··· Earth and sand G ··· Drain H ··· U-shaped side groove H1 · · · Top of U-shaped side groove 230 · · Support shaft 212 · · Horizontal frame

Claims (2)

A vertical surface collapse prevention structure in which pseudo stone panels are juxtaposed on a vertical surface, and a steel wall material is connected and fixed to the pseudo stone panel,
The pseudo stone panel has a unit weight of 60 kg or less, and is composed of a back plate and a pseudo stone made of a plurality of hard materials integrally formed on the back plate, and each pseudo stone crosses linearly. It is divided and arranged by latticed grooves that
The steel wall material is composed of lattice reinforcing bars arranged in a lattice pattern so as to be fitted into the lattice concave grooves of the pseudo stone panel.
Vertical surface collapse prevention structure characterized by that.   The steel wall material is provided with a horizontal frame located in the soil at the lower end thereof and stands upright with respect to the horizontal frame, and a holding bar is arranged on the steel wall material, and the holding bar and the horizontal frame The vertical surface collapsing prevention structure according to claim 1, wherein a support shaft is provided for connecting the two to each other and fixing a standing state of the steel wall material.

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