JP2961681B2 - Concrete segment manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a concrete segment.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a segment, FIG.
As shown in FIG. 7, concrete is poured from above into a segment form a having a curved surface portion in the vertical direction while applying vibration with a vibrator or the like, and a certain amount of concrete is poured. A lid form b having a portion is attached, and concrete is cast to the final casting level.

[0003] After that, the lid frame b is removed, and after a curing time suitable for finishing has elapsed, the upper surface is finished.

[0004]

According to the above-mentioned conventional method, concrete having a low water / cement ratio (W / C) and a small slump value is used for the purpose of quickly finishing the concrete upper surface. It is necessary to use it for casting. On the other hand, since the work for finishing the upper surface of the concrete placed in the formwork is performed manually, the influence on the quality of the product and the dimensional accuracy of the product is not small.

[0005] Further, the segments are held in the same posture as when concrete is cast until the mold is removed, and when the mold is removed, the segments are turned upside down and cured underwater. Therefore, a large site area is required for storage of the segments until demolding. The present invention has been proposed in view of the above-mentioned problems of the prior art, and its object is to improve quality, reduce labor, improve production efficiency, and improve site use efficiency. It is to provide an improved method of manufacturing a segment.

[0006]

In order to achieve the above object, according to the concrete segment manufacturing method of the present invention, the sealable segment form is adjusted so that the end face between the rings is located vertically. It is installed vertically and filled with concrete in the same formwork to produce segments.

According to the second aspect of the present invention, a plurality of sealable segment molds are provided with a communicating portion between the steel plates of each of the molds which are in close contact with each other so that concrete can flow into each mold.
Further, the molds are arranged vertically so that the end faces of the inter-ring joints are located vertically, and concrete is continuously filled in the molds to produce a plurality of segments.

According to the third aspect of the present invention, a plurality of segments are simultaneously manufactured and the outer shell form is formed as an integral structure so as to be manufactured vertically so that the end faces of the inter-ring joints are positioned vertically. In addition, a sealing mold can be sealed, and a partition mold for each segment provided with a connection hole is installed therein, and concrete is continuously filled in the mold to manufacture a segment.

[0009]

According to the present invention, as described above, the mold that can be sealed is installed vertically so that the end face of the joint between the rings is located on the upper and lower surfaces without the curved surface being positioned vertically. Since the concrete is filled in the formwork, the finishing work by manpower is unnecessary. In addition, the finishing work by manpower becomes unnecessary, and the quality and dimensional accuracy of the segment surface are improved by covering all surfaces of the segment with the mold.

[0010] Further, since the formwork is installed in a vertical form from the time of concrete casting, the efficiency of use of the site of the manufacturing place is improved, and the segment reversing operation at the time of removal from the mold is omitted. According to the invention of claim 2, a communication portion is provided between the steel plates of each of the molds to which the plurality of sealable segment molds are in close contact to form a structure in which concrete can flow into each of the molds. Vertically installing the joints between the rings so that the joint end faces are located vertically, filling concrete continuously in each formwork, and simultaneously and continuously casting concrete of a plurality of segments. Can be.

According to the third aspect of the present invention, the plurality of segments are arranged such that the end face between the rings is positioned vertically.
For simultaneous and vertical production, the outer shell formwork is manufactured as an integral structure, which can be sealed, and a partition formwork for each segment with connection holes is installed inside, and concrete is installed in the same formwork. Is continuously filled, in addition to solving the above-mentioned problems, it is possible to improve the concrete placing efficiency of the segment.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. A is a closed segment formwork, which is installed vertically so that the end faces between the rings are positioned vertically as shown in FIG. 1, and concrete is poured into the formwork A from a concrete casting opening B. To fill the same mold A. Also, at the start of concrete casting, remove the upper formwork, pour the concrete from above, and when the concrete reaches a certain height in the formwork, attach the upper formwork and seal the same formwork, May be finally filled. In addition, in order to ensure concrete filling into the formwork, air is vented near the upper surface of the formwork, and the concrete pouring opening B is kept higher than the upper surface of the segment, or concrete is press-fitted. You need a method.

FIG. 2 and FIG. 3 show an embodiment according to the second aspect of the present invention, in which a plurality of sealable segment forms A are joined together, and a form steel sheet adjacent to the face plate in each form A is provided. A communication portion C communicating with 1 is provided, the structure is such that concrete can flow between the adjacent formwork, and it is installed vertically so that the end face between the rings is located vertically in the same manner as in the previous embodiment. Thus, by pouring concrete from one concrete pouring hole B provided in the segment form A, the concrete filling of the plurality of segment forms A can be performed simultaneously and continuously. Also, at the start of concrete casting, remove the top formwork, pour concrete into all formwork from above, and when the cast concrete reaches a certain height inside the formwork, A method in which a mold is attached and hermetically sealed and finally filled with concrete may be employed. In order to ensure that concrete is filled into the formwork, air must be vented to the top of the formwork, and the concrete pouring opening B must be kept higher than the top end of the segment, or concrete must be pressed in during concrete placement. You need a way to do that. In the figure, reference numeral 2 denotes a form reinforcement rib.

FIGS. 4 and 5 show an embodiment according to the third aspect of the present invention. Since a plurality of segments A 'are manufactured in a vertical type so that the end faces of the ring-to-ring joints are positioned in the vertical direction, the sealing is performed. A plurality of partition formwork steel plates 1 each having a connection hole C 'provided in a form A' of a possible outer shell are installed inside the concrete, and concrete is poured from one concrete pouring hole B. The concrete filling of the segments can be performed continuously. Also, at the start of concrete casting, remove the upper formwork and cast concrete from above, and when the poured concrete reaches a certain height, attach the upper formwork and seal, and finally fill the concrete A method may be adopted. In addition, when casting concrete, in order to ensure that concrete is filled into the formwork, an air vent is provided on the upper surface of the formwork,
In addition, a method of holding the concrete pouring opening B higher than the upper surface of the segment formwork or press-fitting concrete is required.
In the drawing, reference numeral 3 denotes an outer diameter / inner diameter difference adjustment packing.

The above-described method of installing a closed formwork in a vertical form and filling the formwork with concrete to form a segment is applicable to the manufacture of all types of segments such as RC segments and steel-concrete composite segments. Applicable.

[0016]

According to the present invention, as described above, the sealable segment formwork is installed vertically so that the end faces of the ring-to-ring joints are positioned vertically, and concrete is filled in the formwork to form a segment. Is molded, the segments are manufactured using a closed mold, and there is no surface finishing by human power, so that the surface quality and dimensional accuracy of the product are improved.

Further, according to the present invention, the segment formwork is installed vertically so that the end faces of the joints between rings are vertically oriented, so that the site of the manufacturing site can be effectively used, and the site efficiency can be improved. In addition, since it is not necessary to invert the segment at the time of demolding, an inversion facility is not required, and the segment is not damaged during the inversion. Furthermore, according to the present invention, it is possible to save manpower in the production of segments, for example, by eliminating the surface finish of concrete by human power.

According to the second aspect of the present invention, a plurality of sealable segment molds are provided with a communicating portion between the molds so that concrete can flow into each of the molds. In addition to the above-described effect of the present invention, a plurality of segments can be simultaneously and continuously provided by placing concrete vertically in the plurality of segment formwork after being arranged side by side so as to be located on the upper and lower surfaces. The concrete casting efficiency and the segment manufacturing efficiency can be improved.

According to a third aspect of the present invention, in order to manufacture a plurality of segments simultaneously and vertically, the mold of the outer shell is manufactured as an integral structure, and is manufactured as a structure that can be sealed as described above. By installing a partition plate for each segment provided with a connection hole therein and placing concrete in the formwork, it is possible to improve the concrete placing efficiency of the segment and the segment manufacturing efficiency in addition to the effects described above. Things.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a method for manufacturing a concrete segment according to the present invention.

FIG. 2 is a perspective view showing an embodiment of another embodiment of the method of the present invention.

FIG. 3 is a sectional view showing details of a portion C in FIG. 2;

FIG. 4 is a perspective view showing an embodiment of still another embodiment of the method of the present invention.

FIG. 5 is a sectional view showing details of a portion C ′ in FIG. 4;

FIG. 6 is a perspective view showing a segment formwork setting step in a conventional method.

FIG. 7 is a perspective view showing a state in which a lid mold is attached to the mold.

[Explanation of symbols]

 Reference Signs List A Segment formwork A 'Outer formwork B Concrete pouring hole C Communication part C' Connection hole 1 Formwork steel plate 2 Formwork reinforcing rib 3 Outer diameter / inner diameter difference packing

Claims (3)

(57) [Claims] 1. A concrete structure characterized in that a sealable segment form is installed vertically so that an end face of a joint between rings is located vertically, and concrete is filled in the form to form a segment. Segment manufacturing method. 2. A structure in which a plurality of sealable segment formwork is provided with a communicating portion between steel plates of the formwork which are in close contact with each other to allow concrete to flow in each formwork, and each formwork is formed between rings. The method for producing a concrete segment according to claim 1, wherein the joint end faces are arranged vertically so as to be positioned vertically, and a plurality of segments are formed by continuously filling concrete in each of the formwork. 3. In order to manufacture a plurality of segments simultaneously and vertically so that the end faces of the ring-to-ring joints are located in the vertical direction, an outer shell formwork is manufactured as an integral structure and can be hermetically sealed. 2. The method for producing a concrete segment according to claim 1, wherein a partition form for each segment provided with connection holes and the like is installed inside, and concrete is continuously filled into the form to form the segment.