JP5885566B2 - Xiamen collar structure and method for constructing box joint using the structure - Google Patents

Description

  The present invention relates to a lock gate collar structure disposed on a joint portion of a box forming a lock gate, and a method of constructing a joint portion of the box body using such a lock gate color structure.

  The box forming the lock installed across the embankment has joints installed at intervals of about 10 m in order to prevent cracking due to temperature stress (see FIG. 9). On the other hand, a collar is installed at the joint of the box in order to prevent the level difference and water leakage of the box caused by the uneven settlement of the box. A conventional general collar is a box installed approximately every 10 m in order to allow a certain behavior (horizontal displacement) of the joint while suppressing the occurrence of a step (vertical displacement) in the joint. It was configured to surround the periphery of the joint part with 40 cm thick concrete containing a joint material having a thickness of 20 mm in the joint part of the body.

  However, when a conventional collar is used, there is a disadvantage that a round cut crack tends to occur at the end of the box. The displacement of the box is considered to change due to a combination of uncertainty factors such as support ground strength and variations in strength distribution, changes in applied load, and differences in earthquake behavior. As a result, steps and rotations occur due to the uneven settlement of the boxes, but in the case of a concrete collar, it is constrained by the collar, and therefore it is presumed that round cracks will occur. In addition, since the conventional method involves concrete construction, there is also a disadvantage that it takes too much construction work period compared to the color scale.

  The present invention has been developed in view of such a situation, and prevents the occurrence of cracks at the end of the box, and enables the construction period to be shortened, and An object of the present invention is to provide a method for constructing a joint portion of a box using such a Xiamen color structure.

  The Xiamen collar structure according to claim 1 of the present invention includes an EPS block arranged so as to cover the joints of adjacent box bodies, and a geotextile arranged so as to cover the EPS block. And the EPS block and the geotextile are fixed to the joint by a wire.

  The Xiamen color structure described in claim 2 of the present application is characterized in that, in the Xiamen color structure of Claim 1, the EPS block includes a block made of polystyrene foam.

  The lock collar structure according to claim 3 of the present application is the lock collar structure according to claim 1 or 2, wherein the periphery is an upper surface, a lower surface and both side surfaces of the joint portion, or an upper surface and a lower surface. It is either one.

  The Xiamen color structure described in claim 4 of the present application is the Xiamen color structure described in any one of claims 1 to 3, wherein the Xiamen color structure is disposed outside the EPS block and the geotextile. Further, a steel plate for covering the EPS block is further provided.

  The method for constructing the joint part of the box described in claim 5 of the present invention includes a step of arranging a geotextile for covering the lower surface of the joint part at a place where the joint part is installed, A step of disposing an EPS block on the geotextile for covering the lower surface; a step of disposing an EPS block on the side surface and upper surface of the joint portion after constructing the box; and an EPS block on the side surface and upper surface of the joint portion And a step of disposing the geotextile so as to cover the wire, and a step of fixing the EPS block and the geotextile with the wire.

  The method for constructing the joint portion of the box according to claim 6 of the present application is characterized in that, in the method of claim 5, the EPS block includes a block made of polystyrene foam.

  The method for constructing the joint portion of the box described in claim 7 of the present application further includes the step of arranging a steel plate outside the EPS block and the geotextile in the method of claim 5 or 6. To do.

  According to the present invention, since the collar structure is formed by the relatively flexible EPS block, the restraining force by the collar is suppressed, and the occurrence of cracks at the end of the box can be prevented. Moreover, in this invention, since various work (formwork, reinforcement, concrete placement, demolding, etc.) accompanying the construction of the concrete collar is not required, the construction period can be greatly shortened.

It is the partial cutaway perspective view which showed the lock collar structure which concerns on preferable embodiment of this invention. It is a cross-sectional view of the Xiamen collar structure of FIG. FIG. 3 is a view taken along line 3-3 in FIG. 2. It is the expansion perspective view which showed a part of Xiamen collar structure of FIG. 5 (a) is an enlarged view of the portion 5a in FIG. 2, FIG. 5 (b) is an enlarged view of the portion 5b in FIG. 2, FIG. 5 (c) is an enlarged view of the portion 5c in FIG. (D) is a perspective view of the fixed steel plate for bottom boards. It is the figure which showed the usage form of an EPS block. It is the enlarged view which showed the example which uses a steel plate. It is a series of figures which showed the procedure of constructing the joint part of a box. It is the whole figure which showed an example of Xiamen.

  Next, with reference to the drawings, the Xiamen collar structure according to a preferred embodiment of the present invention will be described in detail. FIG. 1 is a partially cutaway perspective view showing a lock collar structure according to a preferred embodiment of the present invention. The Xiamen collar structure generally designated by reference numeral 10 in FIG. 1 includes an EPS block 12 arranged so as to cover the joints of adjacent box bodies. Here, the periphery of the joint portion means the upper surface, the lower surface, and the left and right side surfaces of the joint portion.

  The EPS block 12 means a block made of beaded polystyrene foam in a narrow sense, but in this specification, it also includes a block made of styrene foam, for example, used as a lightweight embankment material. The EPS block 12 has a required width that can completely cover the joint and a required thickness that does not easily break.

  The EPS block 12 may be a block having a required thickness w (FIG. 6A), or a plurality of thin plate-like EPS plates may be stacked to obtain a required thickness w. It is also possible (FIG. 6B).

  The Xiamen collar structure 10 includes a geotextile 14 disposed so as to cover the EPS block 12 and a wire 16 for fixing the EPS block 12 and the geotextile 14 to the joint portion.

  By disposing the geotextile 14 between the EPS block 12 and the wire 16, it is possible to prevent the wire 16 from biting into the EPS block 12 and damaging the EPS block 12. Further, the EPS block 12 has a characteristic that it is strong against compression but weak against bending and shearing force, but the weak point of the EPS block 12 can be reinforced by using the geotextile 14 strong against bending and shearing force.

  Note that any kind of geotextile 14 may be used.

  FIG. 5A is a diagram showing a state in which the EPS block 12 arranged on the lower surface of the box is fixed by the wire 16. For fixing the EPS block 12 on the lower surface of the box, a fixed steel plate 17 for the bottom panel is used. As shown in FIG. 5 (d), the bottom plate fixing steel plate 17 is formed in a boat-like shape by bending the four sides of a rectangular steel plate of a predetermined size upward, and a wire fixing bracket 17a is provided at the bent portion. It is attached. Then, the EPS block 12 is arranged on the bottom plate fixing steel plate 17, and the EPS block 12 is fixed by connecting the shackle 16a at the end of the wire 16 to the wire fixing bracket 17a. In this way, by laying the bottom plate fixing steel plate 17 on the lower surface of the box, it is possible to prevent the EPS block 12 from being damaged due to a step shift (shear). FIG. 5B is a view showing a state in which the EPS block 12 arranged on the upper surface of the box is fixed by the wire 16, and the corner fixing bracket is provided so as not to damage the corner of the EPS block 12. 18 is used. FIG.5 (c) is the figure which showed the state in which the EPS block 12 arrange | positioned on the side surface of the box is being fixed with the wire 16, and the wire 16 is tensioned using the turnbuckle 16b. 5 is merely an example, and other forms may be used as long as the EPS block 12 (and the geotextile 14) can be firmly fixed.

  Next, a method for constructing the joint portion of the box using the Xiamen collar structure 10 will be described with reference to FIG. First, after placing the fixed steel plate 17 for the bottom plate and the geotextile 14 for covering the lower surface of the joint part of the box at the place where the joint part of the box is installed (FIG. 8A), the joint of the box An EPS block 12 for covering the lower surface of the part is arranged on the geotextile 14 (FIG. 8B). Next, the box is constructed (FIG. 8 (c)), the formwork and the like are removed, and then the EPS block 12 is placed on the side and top surfaces of the joint of the box (FIG. 8 (d)). The geotextile 14 is arranged so as to cover the EPS block 12 on the side surface and the upper surface of the joint portion (FIG. 8E), and fixing with the wire 16 completes the construction of the joint portion (FIG. 8F).

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, in the above embodiment, the EPS block 12 is covered with the geotextile 14 and fixed with the wire 16. However, when the EPS block 12 is assumed to be damaged, the EPS block 12 is prevented from being damaged. It is preferable to cover the assumed EPS block 12 with the steel plate 20 (see FIG. 7).

  In the above embodiment, the four rounds of the box are covered with the EPS block 12, but considering that the main displacement generated in the box is in the vertical direction, only the upper and lower surfaces of the box are covered. You may comprise so that it coat | covers with the EPS block 12, and coat | covers the side surface of a box with a rubber material etc.

DESCRIPTION OF SYMBOLS 10 Xiamen collar structure 12 EPS block 14 Geotextile 16 Wire 16a Shackle 16b Turn buckle 17 Fixed steel plate for bottom plates 18 Fixed metal fitting for corner parts 20 Steel plate

Claims (7)

An EPS block arranged to cover the joints of adjacent box bodies;
Comprising a geotextile arranged to cover the EPS block;
The Xiamen collar structure, wherein the EPS block and the geotextile are fixed to the joint by a wire.   The lock structure according to claim 1, wherein the EPS block includes a block made of polystyrene foam.   3. The lock collar structure according to claim 1, wherein the periphery is any one of an upper surface, a lower surface and both side surfaces of the joint portion, or an upper surface and a lower surface.   4. The sluice collar structure according to claim 1, further comprising a steel plate for covering the EPS block outside the EPS block and the geotextile. 5. It is a method of constructing the joint of the box forming the lock gate,
Placing a geotextile for covering the lower surface of the joint portion at a place where the joint portion is installed; and
Placing an EPS block on the geotextile to cover the lower surface of the joint;
After constructing the box, placing the EPS block on the side surface and top surface of the joint part;
Arranging the geotextile so as to cover the EPS block on the side surface and the upper surface of the joint portion;
Fixing the EPS block and the geotextile with the wire;
A method comprising the steps of:   6. The method of claim 5, wherein the EPS block comprises a polystyrene block.   The method according to claim 5, further comprising disposing a steel plate outside the EPS block and the geotextile.

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