JP2014173396A - Bed protection construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parallel cross frame that can easily make a concrete block with a frame in situ, and executes a bed protection construction method while making the concrete block with the frame.SOLUTION: A bed protection construction method comprises the following step: a step of damming a flowing water and exposing the ground at the bottom of the flowing water; a step of laying water-permeable cloth on the exposed ground; a step of installing a parallel cross frame having square timbers 1 assembled stepwise on the water-permeable cloth in parallel crosses, and formed by fitting weir plates 2 between upper and lower square timbers 1, 1 forming each side of the parallel crosses; a step of making a concrete block with a frame by pouring ready-mixed concrete into the parallel cross frame and hardening it; and a step of releasing the damming of the flowing water and returning the flowing water on the surface of the ready-mixed concrete of the concrete block with the frame. Also, the parallel cross frame with upholstered back side formed by providing the water-permeable cloth 4 in a tensioned condition at the lowest stage of the parallel cross frame may be used as the parallel cross frame.

Description

  The present invention relates to a floor protection method for the purpose of preventing scouring of the ground under running water such as a coast, a river or a lake.

  Since coastal ground, river ground (river bed), lake ground, river and lake shore ground, etc. are scoured by running water, various floor protection methods have been used in the past. For example, a concrete block having a specific shape is installed on the ground under running water. Patent Document 1 also includes a frame in which a cloth bag is placed along the inner wall of a cross-girder frame in which square bars are assembled in a cross-beam shape, and ready-mixed concrete is poured into the cloth bag and cured. It has been proposed to install concrete blocks on the ground under running water.

  This concrete block with a frame is characterized in that a gap is formed between the upper and lower square members forming each side of the cross beam, and the ready-mixed concrete is swelled and hardened together with the cloth bag from the gap. And, by bulging to the outside, the girder frame and the concrete are integrated and difficult to come off. Since it is characterized by the fact that it bulges to the outside in this way, the degree of bulge is difficult to adjust, and the ready-mixed concrete does not bulge with the cloth bag between the gaps, and the concrete block may easily come off from the cross girder frame. It was. There was also a risk that the concrete block would protrude from the well girder frame due to excessive swelling.

Japanese Patent No. 4844787

  An object of the present invention is to provide a well girder frame that can easily create a concrete block with a frame on site, and to construct a floor protection method while creating the concrete block with a frame.

  In the present invention, square members are assembled in a cross-beam shape, and the above problems are solved by using a cross-girder frame in which a weir plate is fitted between upper and lower square members forming each side of the cross beam. is there. That is, the present invention includes a step of damming running water to expose the ground under running water, a step of laying a water-permeable fabric on the exposed ground, and a square material having steps in a grid pattern on the water-permeable fabric. A process of installing a well girder frame in which a weir plate is fitted between the upper and lower square members forming each side of the well girder, and pouring concrete into the well girder frame and hardening it to make a concrete block with a frame And a step of releasing running water damming and returning running water to the concrete block ready-mixed surface with the frame.

  Further, according to the present invention, a square bar is assembled in a cross-beam shape, and a cross-girder frame in which a weir plate is fitted between upper and lower square bars forming each side of the cross-girder. The lower part solves the above problems by using a backside cloth well girder frame in which a water-permeable cloth is stretched. That is, the present invention includes a step of damming running water to expose the ground under running water, a step of installing the above-mentioned backside cloth well girder frame on the exposed ground, and ready-mixed concrete in the backside cloth well girder frame. A method of creating a concrete block with a frame by pouring and curing, and a step of releasing running water damming and returning the flowing water to the concrete block ready-mixed concrete surface with the frame Is. In addition, when this back surface cloth well girder frame is used, the concrete block with a frame can also be created not in the ground which lays a concrete block but in the said ground.

  Since the present invention uses a well girder frame in which a weir plate is fitted between the upper and lower square members forming each side of the well beam, even if fresh concrete is poured into the cross beam frame, there is a gap between the upper and lower square members. And the ready-mixed concrete will not bulge outside. Moreover, since the water-permeable fabric is laid on the ground before installing the well frame, the ready-mixed concrete does not flow out to the lower part of the well frame. Therefore, it is possible to easily create a concrete block with a frame on the laying ground, and it is possible to construct the floor protection method without transporting a heavy concrete block. Moreover, since the water-permeable fabric laid on the ground allows water to permeate but earth and sand hardly permeate, it also has the effect of further preventing scouring of the ground under the framed concrete block.

  In addition, when using a back-faced cloth girder frame with a water-permeable cloth stretched at the bottom of the cross-girder frame, this water-permeable cloth exists on the ground, so the step of laying the water-permeable fabric on the ground is omitted. It becomes possible to do. That is, the same effect as described above can be achieved while omitting the step of laying the water-permeable fabric on the ground.

It is the perspective view which showed an example of the cross beam frame used by this invention. It is the perspective view which showed an example of the back surface cloth well girder used by this invention.

  The cross girder frame used in the present invention is, for example, as shown in FIG. This cross beam frame is assembled so that the square bars 1 are stepped to form a cross beam shape. The cross girder frame shown in FIG. 1 is assembled in five stages. A dam plate 2 is fitted between the upper and lower square members 1 forming each side of the cross beam. In order to fit the barrier plate 2 between the square members 1, a groove is cut in the center of the width of the side surface of the square member 1 in the longitudinal direction, and the barrier plate 2 is inserted into the groove. The barrier plate 2 may be fitted not only between the square members 1 but also on the lower surface of the lowermost square member 1, or may be fitted on the upper surface of the uppermost square member 1. In the present invention, since the weir plate 2 is fitted between the square members 1 at each side of the cross beam, rattling is unlikely to occur during transportation. That is, even when an external force is applied to the cross beam frame, the shape of the cross beam can be maintained without being deformed. The holes 3 are bolt insertion holes for fixing the upper and lower stages of the cross beam frame.

  Using the well girder frame shown in FIG. 1, the floor protection method is constructed in the following procedure. As an example of the floor protection method, when the riverbed flooring method is used, the river water is first dammed to expose the ground to be floored. And a water-permeable fabric is laid on this ground. As the water-permeable fabric, a knitted fabric or a non-woven fabric is used. In particular, a thick nonwoven fabric is suitably used because it allows water to permeate in the plane direction and does not allow earth and sand to permeate. A cross girder frame is installed on this water-permeable fabric. In general, the cross-girder frame is installed by arranging the cross-girder frames vertically and horizontally and connecting the cross-girder frames. This is because the cross girder frame is less likely to move or capsize. Then, ready concrete is poured into each well frame. In the cross beam frame according to the present invention, since the barrier plate 2 is fitted between the upper and lower square members 1 forming the sides of the cross beam, the ready-mixed concrete does not bulge out from between the square members 1. Further, when the barrier plate 2 is fitted in the center of the width between the square members 1, the ready-mixed concrete becomes a U-shape between the square members 1 and the portions of the barrier plate 2, and the girder frame and the ready-mixed concrete are more integrated. To do. Furthermore, since the water-permeable fabric exists in the lower part of the cross beam frame, the ready-mixed concrete does not flow through the water-permeable fabric. After pouring the ready-mixed concrete, the ready-mixed concrete can be hardened and cured to create a concrete block with a frame. After creating the concrete block with a frame, release the weir and return the running water to the concrete block surface with the frame to complete the construction of the floor protection method.

  Moreover, in this invention, a back surface cloth well girder frame as shown in FIG. 2 can also be used. Similarly to the cross girder frame shown in FIG. 1, the back cloth well girder frame is assembled so that the square members 1 are stepped to form a cross girder shape. A barrier plate 2 is fitted between the upper and lower square members 1 forming each side of the cross beam. In addition to this, a water-permeable cloth is stretched at the bottom of the cross girder frame to form a back side cloth girder frame. As the water-permeable fabric, a knitted fabric or a non-woven fabric is used. This water-permeable cloth is also preferably a thick nonwoven fabric. As described above, the thick nonwoven fabric allows water to permeate in the plane direction but does not allow earth and sand to permeate.

  When the backside cloth well girder frame shown in FIG. 2 is used, the floor protection method is constructed in the following procedure. In the same manner as the well girder frame shown in FIG. 1, the running water of the river is dammed to expose the ground to be solidified. And after this, a back surface cloth well girder frame is installed on the ground. The installation method is the same as in the case of the cross girder frame shown in FIG. In addition, when using a back surface cloth well girder frame, although there is little necessity for laying a water-permeable fabric on the ground, a water-permeable fabric may be laid similarly to the cross girder frame shown in FIG. After installing the backside cloth girder frame, a concrete block with a frame is created in the same process as the cross girder frame shown in FIG. 1, and the construction of the floor protection method is completed.

  When the backside cloth well girder frame shown in FIG. 2 is used, there is no problem even if the framed concrete block is not created on the ground to be solidified. For example, a concrete block with a frame is created by pouring ready-mixed concrete into a backside stretch well girder frame in the vicinity of a river to be hardened. And this concrete block with a frame may be carried to the river to which the floor is hardened, and the floor hardening method may be applied.

1 Square material 2 Dam plate 3 Hole 4 Water-permeable cloth

Claims (6)

A process of damming running water to expose the ground under running water,
Laying a water-permeable fabric on the exposed ground,
On the water-permeable fabric, a step of installing a cross-girder frame in which square members are assembled in a step-like shape, and a weir plate is fitted between upper and lower square members forming each side of the cross-girder,
Pouring the ready-mixed concrete into the well frame and curing it to create a concrete block with a frame; and
A floor protection method comprising a step of releasing running water blocking and returning running water to the ready-mixed concrete block with the frame.   The floor protection method according to claim 1, wherein the barrier plate is fitted by being inserted into a groove provided in the center of the width of the side surface in the longitudinal direction of the square bar.   Square beams are assembled in steps like a grid, and a cross girder frame is formed by inserting a weir plate between the upper and lower square members forming each side of the cross beam, and a water-permeable cloth is provided at the bottom of the cross beam frame. This is a backside stretch well girder frame.   4. The backside cloth well girder frame according to claim 3, wherein the weir plate is fitted into a groove provided in the center of the width of the side surface in the longitudinal direction of the square bar. A process of damming running water to expose the ground under running water,
A step of installing the backside cloth girder frame according to claim 3 on the exposed ground;
Pouring the ready-mixed concrete into the backside stretch well girder frame and curing it to create a framed concrete block; and
A floor protection method comprising a step of releasing running water blocking and returning running water to the ready-mixed concrete block with the frame.   A concrete block with a frame is installed on the laying ground after a concrete block with a frame is prepared by pouring raw concrete into the backside cloth well girder frame according to claim 3 and curing it at a construction site. The floor protection method.

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