JP3383741B2 - Consolidation of asphalt mat and concrete caisson and reinforcement support device for concrete caisson - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt mat used for increasing friction of a concrete caisson, which is attached to the bottom surface of the concrete caisson and a caisson of the concrete caisson and a reinforcement support device for the concrete caisson.

[0002]

2. Description of the Related Art Heretofore, asphalt mats have been known in which a reinforcing core material and a wire rope for lifting are embedded in a mixture of asphalt, filler, sand and crushed stone to form a mat. This asphalt mat is manufactured as follows.

First, the asphalt mat mixture is mixed and stirred and kneaded while being heated by a cooker car, and the temperature is adjusted so that the viscosity becomes suitable for molding. Next, a mold is assembled on the manufacturing base, and a reinforcing material, a wire rope for lifting, etc. are set therein. The production base is generally made of concrete, before the asphalt mat mix paving,
To prevent the asphalt mat and concrete from adhering to each other, apply stone powder with water or apply a roadbed.

Next, using a crane or the like with the bucket lowered, the mat composite material is laid in the form frame in two steps of 1/2 of the total thickness of the asphalt mat so that the reinforcing material is located at the center. . After that, the asphalt mat that has been cooled and solidified to 30 ° C. or less and finished is lifted from its manufacturing base by lifting its wire rope or the like using a crane or the like.

After that, the asphalt mat is transported and laid as required. The applications of such asphalt mats include rubble foundations for breakwaters and shore scour prevention before the wave-dissipating block method, prevention of scouring at the wave-dissipating block method for coastal erosion prevention, prevention of soil suction, protection of embankment slopes, and waterways. And the protection of the slope of the reservoir and the increase of sliding resistance of the caisson.

By the way, among the above-mentioned applications of the asphalt mat, in the case of increasing the sliding resistance of the caisson,
In the case of pasting the asphalt mat on the bottom of the concrete caissons at the land, there is a case where the asphalt mat of manufactured separately already in concrete caisson installation just before in the sea, in advance laying on a foundation Kumen. In the former case, asphalt mats that have been separately produced on land are laid and laid, and concrete caissons are manufactured on them, and the asphalt mats and concrete caisson are integrated and simultaneously installed in the sea.

When the concrete caisson is manufactured on the asphalt mat as described above, as shown in FIG. 7 , the caisson rebar 2 embedded in the concrete caisson 1 is supported on the upper surface of the asphalt mat 3. It is supported by a spacer block 4 etc. that will be a mount,
The number wire 7 bound to the lifting wire rope 6 embedded in the asphalt mat 3 is bound to the caisson rebar 2, and concrete is placed in the formwork 8 arranged around the upper space of the asphalt mat 3 to form the asphalt mat. Complete the concrete caisson 1 integrated with 3.

[0008]

However, the conventional method for manufacturing the concrete caisson 1 on the asphalt mat 3 has the following problems. That is, the concrete caisson should be firmly fixed to the concrete caisson and the asphalt mat when considering the conditions such as temporary placement on the sea for a long time, repeated movement and temporary placement, and towing on the sea for a long time. It is important to combine them to improve the adhesion between them.

However, in the conventional method, the asphalt mat 3 and the concrete caisson 1 are solidified by simply binding the number wire 7 bound to the lifting wire rope 6 to the caisson rebar 2. It is not possible to obtain a result and high adhesion cannot be obtained. Further, as a problem from the viewpoint of work, as described above, it takes a lot of time to bind the number wire 7 with the caisson rebar 2, and it becomes a support base for supporting the caisson rebar 2 on the asphalt mat 3. Since the spacer block 4 is separately required and the installation work of the spacer block 4 is also required, it takes time and labor to bind the caisson rebar 2 and the number wire 7, resulting in poor workability and high cost.

Furthermore, since the lifting wire rope 6 is embedded in the asphalt mat 3, when the divided asphalt mat 3 is laid, the wire rope 6 protruding from the end needs to be cut by acetylene gas or the like after laying. However, there is a drawback that the joints between the ends of the asphalt mat 3 are weakened. The present invention has been made in order to solve the conventional problems as described above, and hopes for a strong consolidation between the asphalt mat and the concrete caisson, high adhesion can be obtained, and workability can be improved. It is an object of the present invention to provide a solidification support device for asphalt mats and concrete caisson and a reinforcement support device for the concrete caisson.

[0011]

For this reason, the invention according to claim 1 is joined to the bottom surface of a concrete caisson,
In the asphalt mat used for increasing the friction of the concrete caisson, a support made of a rigid body protruding from the upper surface of the mat is embedded, and when concrete is poured into the formwork on the asphalt mat to produce a concrete caisson, concrete is used. a the caisson rebar is Haisuji inside the caisson was capable of supporting structure by said support
Solidification and control of the concrete mat
In the cleat caisson bar arrangement support device, the support
Is the fixing member embedded in the asphalt mat and the fixing member.
Fixed parts and asphalt mats that are screw-fitted to fixed members
A bar having at least a supporting portion extending substantially parallel to the upper surface
And a member .

[0012]

The invention according to claim 2 is characterized in that the rod member is formed in a substantially L shape in which a fixed portion extends linearly and a support portion is bent .

The invention according to claim 3 is a concrete case.
It is joined to the bottom of the concrete caisson and
The asphalt mat used for increasing the friction is
Embed a rigid support that projects from the top of the
Pour the concrete into the formwork on the Sphalt mat
When making a concrete caisson,
The caisson rebar arranged inside the cord is supported by the support.
Asphalt mat and concrete
Consolidation of tho caisson and reinforcement support of concrete caisson
In the apparatus, the support has a lower end fixing portion embedded in an asphalt mat and an upper end rotating portion protruding from an upper surface of the asphalt mat, and a rotating support member rotatably supported by the rotating support member. And a bar member having at least a supporting portion extending from the upper surface and a supporting portion extending substantially parallel to the upper surface of the asphalt mat.

The invention according to claim 4 is characterized in that the rod member is formed in a substantially Z shape in which a rotating portion and a supporting portion are bent. According to a fifth aspect of the present invention, the rod member is formed in a substantially U shape having a pair of rotating portions and a supporting portion extending from both rotating portions and being bent and connected to each other. Characterize.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a reinforcing bar arrangement device for a concrete caisson for consolidation of an asphalt mat and a concrete caisson according to the present invention, FIG.
[Fig. 3] is a cross-sectional view showing a usage example of this device.

In these drawings, the device is joined to the bottom surface of a concrete caisson 11, and an asphalt mat 12 used for increasing the friction of the concrete caisson 11 is provided with a support made of a rigid body protruding from the upper surface of the mat 12. When the concrete 13 is buried and the concrete caisson 11 is manufactured by pouring concrete on the asphalt mat 12, the concrete caisson 11 is manufactured.
The caisson rebar 15 embedded inside is supported by the support 13.

Here, the support 13 has a rectangular metal fixing plate 13A as a fixing member embedded in the asphalt mat 12, and a fixing portion 13 fixed to the fixing plate 13A and embedded in the asphalt mat 12.
a and a support portion 13b protruding from the upper surface of the asphalt mat 12 and extending substantially parallel to the upper surface of the asphalt mat 12
And a metal rod member 13B having at least.

The rod member 13B is formed in a substantially L shape in which the fixed portion 13a extends linearly and the support portion 13b is bent. At the center of the upper surface of the fixed plate 13A, a cylindrical socket 16 having an internal thread portion 16a formed on its inner peripheral surface is fixed by welding 17. A male screw portion 13c is formed on the outer peripheral surface of the fixed portion 13a of the rod member 13B.
Is formed, and the male screw portion 13c is inserted into the socket 16
The fixing plate 13A and the rod member 13B are fixed to each other by being screwed into the female screw portion 16a.

Numeral 18 is a space-filling resin interposed between the inner end surface of the socket 16 and the end surface of the fixed portion of the rod member 13B. The support 13 having the above configuration is embedded in the asphalt mat 12 from the lower end to the tip surface of the socket 16. Next, a method of using the asphalt mat and the concrete caisson having the above-mentioned structure for the consolidation and the reinforcing bar supporting device of the concrete caisson will be described as a cast-in-place type asphalt mat manufacturing method.

First, the asphalt mat 12 is manufactured on a caisson manufacturing box on which the concrete caisson 11 is installed. At this time, the support 13 is attached to the asphalt mat 1
It is installed by embedding it in the prescribed part of 2. Next, the concrete caisson 11 is manufactured on the asphalt mat 12, and the asphalt mat 12 and the concrete caisson 11 are integrated and simultaneously installed in the sea.

In this case, the caisson rebar 15 embedded in the concrete caisson 11 is supported by the upper end portion of the bar member 13B of the support body 13 serving as a support stand installed on the upper surface of the asphalt mat 12, and in this state, the asphalt Concrete is poured into the mold 14 arranged around the upper space of the mat 12 to complete the concrete caisson 11 integrated with the asphalt mat 12.

The details required for installing the concrete caisson 11 using the above-mentioned supporting device are as follows. (1) Socket 16 at the time of paving the asphalt mat mixture
A waste cloth is packed inside to prevent the mixture from entering the inside of the socket 16. (2) The composite material is applied in two layers, and after placing the first layer, the supporting device is installed at a predetermined position. The upper end of the socket 16 is a standard for the finished top of the second layer. (3) The bar member 13B is screwed into the socket 16 when the caisson rebar 15 is assembled, and the height of the bar member 13B at the time of this screwing is set to the height at which the caisson rebar 15 is set.
Space-filling resin 18 is previously filled in the socket 16. (4) The support 13 is arranged according to the arrangement of the caisson reinforcing bars 15.

According to this structure, since the support 13 is embedded in the asphalt mat 12 in advance, it is not necessary to bind the wire with the caisson rebar as in the conventional case, and the caisson rebar is supported on the asphalt mat. Although it is necessary to separately prepare a spacer block that serves as a support pedestal, most of it can be omitted. For this reason,
It is possible to reduce the labor and time required for arranging caisson reinforcing bars, improve workability, and reduce costs.

Further, by embedding the support having such a structure in the asphalt mat, the following advantages can be obtained. That is, by embedding a bar member 13B having a substantially L-shaped irregular shape in the concrete caisson 11, the support 1
3 and the binding force between the concrete caisson 11 and, by extension,
The solidifying force between the asphalt mat 12 and the concrete caisson 11 is increased, and the adhesion between the two can be improved.

Further, as is clear from the above (2), the bar member 13B of the support 13 can be used as a ruler for controlling the thickness of the mixture material when the asphalt mat 12 is paved. Further, since the conventional wire rope for lifting is not used, it is not necessary to cut the wire rope with acetylene gas or the like, and there is no disadvantage that the joint portion between the end portions of the asphalt mat is weakened.

[0027]

[0028]

The support of the above-mentioned embodiment is embedded in a fixed state in an asphalt mat, and the asphalt mat having such a support embedded therein is used when paving at the site where concrete of a concrete caisson is placed. It is suitable, but instead of paving the asphalt mat at the concrete caisson concrete pouring site, multiple asphalt mats are made in advance at a place different from the concrete pouring place, and each asphalt mat is stacked. The structure of the support that is temporarily stored and is suitable for lifting and moving the asphalt mat as required will be described below with reference to FIGS. 3 to 5 .

In the support body 27 shown in FIG . 3 , the lower end fixing portion is embedded in the asphalt mat, and the upper end rotating portion projects from the upper surface of the asphalt mat.
And a metal rod member 27B having at least a rotating portion rotatably supported by the rotation supporting member 27A and protruding from the upper surface of the asphalt mat and a supporting portion extending substantially parallel to the upper surface of the asphalt mat. To be done.

Here, the metal rotation support member 27A has a cylindrical portion 27a which is bent into a cylindrical shape as an upper end rotation portion.
And a pair of legs 27b bent in a substantially L shape as lower end fixing portions extending in opposite directions from both ends of the cylindrical portion 27a. An intermediate portion of the upper half of the cylindrical portion 27a is cut off and opened (open portion 27c).

On the other hand, the metal rod member 27B is formed in a substantially U shape having a pair of rotating portions 27d and a supporting portion 27e extending from both rotating portions 27d and being bent and connected to each other. And the pair of rotating portions 27d includes the cylindrical portion 2
It is rotatably inserted and supported at both ends of 7a. in this case,
As described above, since the intermediate portion of the upper half of the cylindrical portion 27a is cut off to form the open portion 27c, the rotary portion 27d is allowed to rotate at this portion, and the rotary portion 27d is rotated by about 180 °. Is possible.

In FIG. 3 , reference numeral 28 denotes a reinforcing member for the asphalt mat, which is composed of a linearly extending metal rod member and is fixed to the outer corner surface of the corner portion of the foot portion 27b by welding 29. In the support body 27 shown in FIG. 4 , the foot portion 27f of the rotation support member 27C is extended to the side opposite to the extending direction of the foot portion 27b of the embodiment of FIG. 3 , and the inner corner surface of the corner portion of the foot portion 27f is extended. The reinforcing member 28 is welded to and fixedly attached thereto.

In the support 33 shown in FIG . 5 , the lower end fixing portion is embedded in the asphalt mat, and the upper end rotating portion projects from the upper surface of the asphalt mat.
And a metal rod member 33B rotatably supported by the rotation support member 33A. Here, the metal rotation support member 33A has a cylindrical portion 33a that is bent into a cylindrical shape as an upper end rotation portion, and a substantially L portion as a lower end fixing portion that extends in opposite directions from both end portions of the cylindrical portion 33a.
It is composed of a pair of leg portions 33b bent in a letter shape. The pair of leg portions 33b are formed in a plate shape, respectively, and are bonded to each other and welded and fixed by welding 34.

An intermediate portion of the upper half of the cylindrical portion 33a is cut off and opened (open portion 33c). On the other hand, the metal rod member 33B includes the support portion 33e and the support portion 3e.
3e extending from 3e, bent and butted against each other and welded 3
5 is formed in a substantially rectangular ring shape having a pair of rotating portions 33d coupled to each other.
d is rotatably inserted and supported at both ends of the cylindrical portion 33a.

In this case, the rotating portion 33d has an angle of about 180 °.
The angle can be rotated. Support 2 having the above configuration
7 and 33, since it is necessary to rotate the metal rod members 27B and 33B , from the lower end portion to the upper end positions of the foot portions 27b, 27f, 33b are embedded in the asphalt mat, and the cylindrical portion 2
Approximately one half of 7a and 33a is substantially projected from the asphalt mat.

Next, in the supporting device having such a structure,
Since the metal rod members 27B and 33B are rotatable, by placing them in a substantially horizontal state,
Asphalt mats can be stacked and temporarily stored, and as described above, multiple asphalt mats can be manufactured in advance in a place different from the place where the concrete caisson is installed, and each asphalt mat can be stacked and temporarily stored. It is suitable for hoisting and moving the asphalt mat if necessary.

When the asphalt mat is hoisted and moved, the metal rod members 27B and 33B are erected substantially vertically as shown in FIG.
1 Hook each hook portion 32 at the tip. or,
When installing the concrete caisson on the asphalt mat, the metal rod members 27B and 33B are set up in a substantially vertical state, and the caisson rebar embedded inside the concrete caisson is supported by the support member 27 installed on the upper surface of the asphalt mat. , 33 rod members 27B, 33B are supported at their upper ends, and in this state, concrete is poured into the formwork arranged around the upper space of the asphalt mat to complete the concrete caisson integrated with the asphalt mat. good.

The metal rod members 27B and 33B in the embodiments shown in FIGS. 3, 4 and 5 may be formed in a substantially Z shape in which the rotating portion and the supporting portion are bent.

[0040]

As described above, according to the inventions according to claims 1 to 5 , since the support is embedded in the asphalt mat in advance, the asphalt mat and the concrete caisson do not need a wire rope for lifting. A strong solidification is expected, and high adhesion can be obtained,
(EN) It is possible to provide a reinforcement for supporting the consolidation of an asphalt mat and a concrete caisson and the reinforcement of the concrete caisson, which can improve workability.

In particular, according to the inventions according to claims 2, 4 and 5 , by embedding a bar member having a substantially L-shape, a substantially Z-shape, and a substantially U-shape in a concrete caisson, an asphalt mat and a concrete caisson can be obtained. The bonding strength of the two can be increased, the integration of the two can be firmly maintained, and the rod member of the support can be used as a ruler for controlling the thickness of the mixture when paving an asphalt mat.

According to the inventions according to claims 3 to 5 , the asphalt mats can be stacked and temporarily stored, and a plurality of asphalt mats can be manufactured in advance at a place different from the place where the concrete caisson is installed. However, it has an advantage that it is suitable for stacking and temporarily storing the asphalt mats and hoisting and moving the asphalt mats as needed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a concrete caisson supporting device in an asphalt mat according to the present invention.

FIG. 2 is a sectional view showing an example of use of the above supporting device.

FIG. 3 is a perspective view of another embodiment.

FIG. 4 is a perspective view of still another embodiment.

FIG. 5 is a perspective view of still another embodiment.

FIG. 6 illustrates a method of suspending an asphalt mat .
Perspective view

FIG. 7: Concrete in a conventional asphalt mat
Cross-sectional view showing the Toe caisson support device and its use example

[Explanation of symbols]

11 concrete caisson 12 asphalt mat 13 support 14 formwork 15 caisson rebar 13A fixed plate 13B rod member 13a fixed portion 13b support portion 27 support 27A rotation support member 27B metal rod member 27a cylindrical portion 27b foot portion 27d rotation portion 27e Support part 33 Support 33A Metal rotation support member 33B Metal rod member 33a Cylindrical part 33b Foot part 33c Open part 33d Rotation part 33e Support part

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-7-207675 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02D 23/00 E02D 23/02

Claims (5)

(57) [Claims] 1. A support made of a rigid body projecting from the upper surface of a mat is embedded in an asphalt mat that is joined to the bottom surface of the concrete caisson and is used for increasing the friction of the concrete caisson, and the concrete is cast on the asphalt mat. When casting a concrete caisson by pouring it into a formwork, the caisson rebar to be reinforced inside the concrete caisson can be supported by the above-mentioned support, and the asphalt mat and the concrete caisson can be fixed together.
In a reinforcing bar supporting device for a concrete caisson, the supporting member is a fixing portion embedded in an asphalt mat.
Material, fixing part and asphalt screw-fitted to the fixing member
Minimize the supporting parts that extend substantially parallel to the upper surface of the Altmat
A bar member having also a bar member, and an asphalt mat and a concrete caisson for consolidation and a reinforcing bar supporting device for a concrete caisson. 2. The rod member has a fixed portion extending linearly,
2. The reinforcing bar supporting device for consolidation of asphalt mat and concrete caisson and reinforcing bar for concrete caisson according to claim 1, wherein the supporting part is formed in a bent L-shape . 3. The bottom of a concrete caisson is joined to
Used to increase the friction of the concrete caisson.
Projected onto the asphalt mat to be covered
Embed a rigid support on the asphalt mat
Concrete caisson by pouring concrete into the formwork
When manufacturing the,
The caisson rebar that can be supported by the support
Solid asphalt mat and concrete caisson
In a concrete caisson bar arrangement support device, the lower end fixing portion of the support is embedded in an asphalt mat.
And the upper end rotating part protrudes from the top surface of the asphalt mat.
And a rotation supporting member that is freely rotatably supported by the rotation supporting member.
Rotating part protruding from the upper surface of the asphalt mat and
Reduce the number of supporting parts that extend substantially parallel to the top surface of the asphalt mat.
And a bar member that has at least
The solidification of the asphalt mat and the concrete caisson and the reinforcement support device of the concrete caisson. Wherein said rod member, claims, characterized in that the rotating portion and the support portion is formed into a substantially Z-shape is bent
3. An asphalt mat according to 3 and a concrete caisson are consolidated and a reinforcing bar supporting device for the concrete caisson. Wherein said rod member includes a pair of rotating parts, Ryokaido
Claims, characterized in that formed in substantially U-shape and a support portion which is connected is bent to one another extend from the portion
Item 3. The asphalt mat according to item 3 and a concrete caisson for consolidation and a reinforcing bar supporting device for a concrete caisson.