JPH0744556Y2 - Floating bridge concrete float - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial application field The present invention relates to improvement of a concrete float for a floating bridge and its mounting member.

(B) Conventional technology The float that supports the deck part of the floating bridge above the water surface is conventionally made by filling and solidifying the foam resin such as Styrofoam inside the outer shell made of synthetic resin, and the installation on the floating bridge is through. Bolts were used. However, since a mold is required for rotational formation of the outer cover and it is costly, a concrete float in which a fiber reinforced cement is coated on the outer surface of a Styrofoam float that can be easily formed from a Styrofoam block has been planned. The thickness of the skin of fiber reinforced cement is
In order to reduce the weight, it is necessary to make it as thin as possible, and concrete is a brittle material by nature, and it is weak against impact,
Further, the styrofoam block also has a weak pressure resistance, and the attachment force to resist the pulling force of the bolt was not sufficient.

(C) Problems to be solved by the invention Since the long deck part of the floating bridge is supported on the water surface by a plurality of floats, due to the load moving on the floating bridge, the arrival and departure of the ship, the waves, etc. Float mounting bolts mounted on the bottom surface of the floating bridge deck are subject to external forces in the upward, downward, and lateral directions, and impact force is applied, which may damage the cement reinforced by mixing fibers or cause the bolt to come out. was there.

(D) Means for Solving the Problem The present invention is to form a foamed concrete foam outer cover of a predetermined shape with a concrete outer cover of fiber reinforced cement, and form a foamed through hole of a foam mounting bolt into a downwardly widening taper shape. A concrete float for a floating bridge, wherein the through hole is filled with fiber reinforced cement so as to surround a bolt.

Furthermore, the following idea was made about the concrete float. That is, (1) a concrete float for a floating bridge, in which rubber seat plates are inserted through the mounting bolts above and below the float mounting member of the floating bridge and the nuts are tightened.

(2) For floating bridges where the concrete float is attached to the bottom of the floating bridge to which the concrete float is attached, and the rubber plate is inserted between the metal fitting and the concrete float to fix it. It is a float.

(3) The lower end of each pair of concrete float mounting bolts is connected by a lower connecting member within the subcutaneous surface of the coated concrete, that is, the lower end of a pair of bolts is connected by a connecting member such as a round bar or a flat plate. Is.

(4) A concrete float in which the upper part of each bolt for mounting the float is connected by a connecting member such as a round bar in the concrete on the upper surface, or the lower end of the mounting bolt is further connected by a connecting material in the concrete on the subcutaneous surface of the concrete. It is a float for the floating bridge.

(E) Action The expanded styrene foam floating body of the mounting through bolt is expanded downward and tapered, and the cement is filled so as to surround the through bolt, so that the mounting bolt exerts an upward force, that is, a force to pull out the bolt. Even so, since the contact area between the concrete around the bolt and the Styrofoam is large and tapered downward, a large drag force acts.

Furthermore, the elasticity of rubber seat plates that are passed through the mounting bolts and applied to the top and bottom of the float mounting member absorbs and relaxes the upper and lower impact forces that act between the mounting member and the concrete float, and prevents concrete cracks from cracking. .

Further, the elasticity of the float support member and the rubber plate alleviates the lateral impact force between the float and the floating bridge and softens the lateral force acting on the float mounting bolt.

Furthermore, by providing a connecting material at the lower end of the mounting bolt,
In addition to making it easier to maintain the position of the outer skin and bolt holes during concrete pouring work, the resistance to pulling force against the mounting bolts has been increased to make it more durable. It distributes the external force acting in the lateral direction to each bolt and eases it, making it easier to hold the bolt, preventing cracks in concrete, and helping to hold the bolt in concrete pouring work.

(F) Example FIG. 1 a, b and c are a plan view, a front view and a side view of a concrete float according to the present invention.
( 1 ) is a concrete float and (2) is a mounting bolt.

FIG. 2 is a sectional view taken along line AA of FIG. 1a. (3) is a Styrofoam floating body, the through hole (4) through which the mounting bolt (2) penetrating the floating body passes has a thick taper downward, and is filled with cement so as to surround the mounting bolt (2). There is. (5) is a concrete outer cover covering the outer circumference of the Styrofoam floating body (3), which is a fiber-reinforced cement mixed with fibers such as nylon, which is formed by concrete casting using a formwork. (5 ') is the upper surface of the outer skin, and (5 ") is the outer skin surface. The outer skin is formed as thin as possible, and even if a crack occurs, buoyancy is not lost by the polystyrene foam.

Fig. 3a shows a state in which the concrete float ( 1 ) is mounted on the float mounting member (7) of the floating bridge ( 6 ) by sandwiching it between the rubber seat plate (8) with the mounting bolt (2) and tightening it with the nut (9). FIG. 3b is a view showing a state in which the impact transmitted to the mounting bolt (2) and the mounting member (7) is directly applied to the concrete float without the rubber seat plate in the conventional example.

Figure 4 is a float supporting bracket at bottom view of浮棧bridge (6) (1
0 ) shows the state where the four corners of the float ( 1 ) are supported.

5a, 5b and 5c are detailed views of the float support fitting ( 10 ), which are a front view, a side view and a bottom view. (11) is a groove-shaped edge member of the floating bridge ( 6 ), which is composed of a fixed part (12) attached to this, a support part (13) welded to its lower surface, and a rubber plate (14) attached to the inner surface of the support member. , It absorbs the external force in the lateral direction between the concrete float and the floating bridge, softens the impact force, and relaxes the lateral impact force on the bolt.

FIG. 6 is a cross-sectional view showing an example in which the lower ends of the pair of mounting bolts (2) in FIG. 2 are connected and integrated, and the pair of mounting bolts (2) and the lower connecting member (15) are integrated into a U shape. It is formed integrally with a round bar of a book, and has an increased resistance to the pulling force applied to the bolt.

In FIGS. 7a and 7b, the lower connecting material (15) at the lower end of the bolt (2) is used as a plate nut stopper, and the upper portion of the mounting bolt is further provided with the upper surface (5 ') of the fiber-reinforced cement coated skin (5).
FIG. 2A is a sectional view taken along the line AA and a sectional view taken along the line BB in FIG. The upper connecting member (16) reinforces against the lateral force applied to the bolt and prevents cracking of the concrete skin.

8a, 8b and 8c are a plan view, a front view and an enlarged view A- of FIG. 8a showing a state in which the concrete float ( 1 ) is attached to the float attachment member (7) on the lower surface of the floating bridge ( 6 ).
FIG.

(G) Effect of the device With the above configuration, the mounting bolt through hole has a downwardly widening taper shape to increase the resistance against the pulling out force of the bolt, and it is possible to use it even for the float of the thin concrete outer cover using the Styrofoam floating body. The float for floating bridges has sufficient mounting strength. In addition, by appropriately selecting the combination of each of the above proposals according to the water surface condition of the water area where the floating bridge is installed, it is possible to provide an economical and durable concrete float that can cope with various water areas from static water area to wave water area. .

[Brief description of drawings]

1a, 1b, 1c and 1c are a plan view, a front view and a side view of a concrete float according to the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1a, and FIG. 3a is the present invention. Fig. 3 is a detailed view of the upper part of the mounting bolt using the rubber seat plate of Fig. 3, Fig. 3b is a view showing the conventional example, Fig. 4 is a layout view of the float support fittings on the lower surface of the floating bridge, and Fig. 5a, b. 7a and 7b are a plan view, a side view and a bottom view of the float support fitting, FIG. 6 shows an embodiment in which the float mounting bolt is U-shaped, and FIGS.
Is a side and front sectional view showing an example in which the lower connecting member of the bolt is a flat plate and the upper connecting member is used.
b and c are a plan view, a front view and a magnified view A- of FIG. 8a showing a state where a concrete float is attached to the floating bridge.
FIG. 1 ...... Concrete float, 2 ...... Mounting bolt, 3 ...
... Styrofoam floating body, 4 ... Through hole, 5 ... Concrete skin, 5 '... Surface upper surface part, 5 "... Extradermal surface part,
6 …… Float bridge, 7 …… Float mounting member, 8 …… Rubber seat plate, 10 …… Float support metal fitting, 14 …… Rubber plate, 15 …… Lower connecting member, 16 …… Upper connecting member.

Claims (5)

[Scope of utility model registration request] 1. An outer surface of a styrofoam floating body having a predetermined shape,
In a concrete float coated with a concrete skin of fiber reinforced cement, a polystyrene foam floating body through hole of a float mounting bolt that penetrates the Styrofoam floating body vertically and projects the upper end to the upper surface of the concrete skin is formed in a downwardly widening tapered shape, and the through hole is formed. A concrete float for a floating bridge, characterized by being filled with fiber-reinforced cement so that it surrounds a bolt. 2. A concrete float for a floating bridge according to claim 1, wherein rubber seat plates are inserted respectively above and below a float mounting member of the floating bridge through mounting bolts and tightened by tightening nuts. 3. The concrete for a floating bridge according to claim 1, wherein a float support metal fitting is provided on the bottom surface of the floating float bridge in contact with each side of the upper edge of the concrete float, and a rubber plate is inserted between the metal fitting and the concrete float. float. 4. The concrete float for a floating bridge according to claim 1, wherein the lower ends of the pair of float mounting bolts are connected to each other by a lower connecting member in the concrete outer subcutaneous surface portion. 5. The concrete float for a floating bridge according to claim 1 or 4, wherein the upper portions of the bolts for mounting the float are connected by an upper connecting member in the upper surface of the concrete outer cover.