JPH0328457A - Forms for caisson - Google Patents

Abstract

PURPOSE:To prevent the occurrence of cracking and damage and to increase the number of times by which forms for caisson are diverted to different places by a method wherein a bent panel is used for bottom haunch forms, on upper crosspiece to which a width deciding rough-and-ready scale is mounted is located to the upper end of side forms, larch plywood is used for forms, and a wale material is mounted. CONSTITUTION:Longitudinal and lateral side forms positioned facing each other are assembled through a wale material, a nonotube 23, a jack base 24, and a chain 21 to form caisson forms. Bottom forms 1 provided at its lower end part with an inwardly inclining slope part 1a and at its upper end part with a vertical rise part 1b, and a bend panel 5 made of larch plywood laminated in a spanned manner to the outside of the bottom forms by means of cross pieces 3b-3d are provided. Upper end crosspieces 8 and 9 of an oak having corner faces 8a and 9a to and from which a rough-and-ready scale rod 10 is mounted are located to the upper end part of inner and outer forms A and B. Cylindrical side forms to and from which side forms for forming the thick concrete part of the upper stage part of a caisson can be mounted and demounted are arranged.

Description

[Detailed description of the invention]

Technical field of t-industry L] The present invention relates to a formwork for a caisson. [Prior Art and Problems to be Solved] Conventionally, various WI structures have been adopted for caisson formwork. However, these formworks have various drawbacks in terms of caisson finishing accuracy, formwork assembly process, number of uses, etc. For example, in Japanese Patent Publication No. 55-99a3, the bottom surface of the side formwork is joined to the seven parts of the bottom formwork installed at the bottom of the frame at a position, so concrete is poured into the formwork. If the caisson is installed, there is a risk of misalignment occurring at the joint between the bottom formwork and the side formwork, which may reduce the strength of the caisson. Since the eight width-determining rods that fit into the -E section of the side formwork of the frame are installed and removed many times, the formwork described in this publication is prone to damage at the ends of the formwork. The disadvantage is that it is difficult to maintain accurate dimensions. In addition, in the Congregation Song Dynasty, lauan plywood was used for the side templates of the formwork, so the plywood was easily damaged and the formwork could not be reused many times. In addition, conventionally, formwork crosspieces are fixed-length crosspieces attached to the side templates of the formwork, so the concrete formwork crosspieces used to manufacture caissons of different sizes are different depending on the type. It has the disadvantage that separate crosspieces must be prepared for each, which is uneconomical and requires time and effort to manufacture. Also, when a caisson is hung from a yard and lowered into the sea, the top layer is made of thick concrete, so the top layer is made of thick concrete.
The L-tier formwork had the inconvenience that the movable formwork used for the lower tier part could not be used directly from the middle tier part.

[Means for solving the problem] (1) The left and right side formworks placed opposite to each other and the front and rear side formworks placed oppositely to each other are equipped with uprights, upper tube vibes, and jack bases. In the formwork of a caisson assembled with a chain, the bottom formwork l has an inwardly inclined inclined part +a at the lower end and an upright rising part 1b at the upper end, and the outside of this bottom formwork. A crosspiece 3b is provided at the lower end inclined portion 1a and the upper end vertically rising portion Ib. 3c. A caisson formwork characterized by having a bent panel 5 made of larch plywood bridged and pasted by 3d. (2) At the upper ends of the inner formwork A and the outer formwork B of the side formwork,
Claim (+) characterized in that the upper end crosspieces 8 and 9 made of apitone material are provided with corner surfaces 8a and 9a for attaching and detaching the square step portions 10a and 10a' of the width determining bar 10. Caisson formwork as described. (3) The formwork for a caisson according to claim 1) or (2), wherein the side formboard of the side formwork is made of larch plywood. (4) The formwork for a caisson according to claim (1), (2) or (3), wherein the upright members are made up of eye beams 15', 16' and shuttering beams 15, +6. (5) Triangular member 3 whose hatch frame is provided on the end face of the side formwork
Claim (1) or (2) or (3) or (4) characterized in that it consists of a face iron plate 32, a nut 33, an annealed iron wire 35, and a single pipe vibrator 34, which are held in a length of 0 and 3L.
Caisson formwork as described. (6) Claim (1) or (2) or (3) or (4) or (5) is characterized in that two crosspieces are attached to the side formwork so that they can slide in the ↑ direction relative to each other. ) Caisson formwork as described. (7) A cylindrical side formwork with a thick-bodied side formwork provided at the upper end to form the thick-walled concrete part of the upper part of the caisson.''
Claim (1) or (2) or (3) or (4) or The caisson formwork described in (5) or (6). [Function] The caisson is raised from the bottom using a slide-up formwork. :
/J, the bent panel of the bottom formwork allows the existing concrete to be placed and the newly poured concrete to be placed on the side 9J.
The side plate of the side formwork was damaged due to repeated engagement and disengagement of the width-determining bar using apiton wood (hard wood) at the top of the side formwork, which was aligned and leveled at the vertical part of the frame. The number of times the formwork can be repurposed is increased by making it as small as possible, and by using larch plywood for the side formboard of the side formwork. In addition, in order to simplify the ground assembly, the side formwork crosspieces were made into two sliding types, making it easier to modify the formwork when manufacturing caisson of different sizes, and when hanging it from the yard and lowering it into the sea. Even if the upper part of the caisson is made of thick concrete, the use of a headband processed plate that can be installed and removed facilitates the production of thick IIJ concrete for the upper part. [Example] An example of the present invention will be described with reference to the drawings. Figure I A, Figure I B, and Figure 1 C show the bottom formwork of caisson formwork 8, in which 1 is the bottom formwork made of channel steel; The lower end of the lower end is inclined inward at an angle of about 45 degrees, and the upper end 1b is a vertically rising part that is continuous with the upper end of the lower end inclined part 1a! It becomes b. 2 is a crosspiece 3tx made of apiton wood between the bottom formwork 1. :3 b. J
Bend panel attached to channel steel 1 via c. 2a is an inclined surface portion inclined at an angle of about 45°, 2b is a straight line portion connected to the two ends of the inclined portion la, and 5 is a bend panel 2.
The crosspiece 3b. 3c, 3d
It is made of larch plywood that was attached to the bridge. The two end faces of the π upright rising portion 2b of the vent panel 2 are water-filled all around, and the joint between the inclined surface portion 2a and the vertical Nj rising portion 2b is integrally molded to maintain the vehicle straightness rZ -. -1x If concrete is placed between the formworks because it is inside the bent part 2b, the concrete will form a continuous vented bottom wall and form a caisson, connecting it with the cylindrical side formwork [ ] is the water point position within the π-direction s7 upward portion 2b, so it is integrally formed in the joint 121 with concrete and no gaps or holes are created. Reference numeral 6 denotes a single clamp for connecting the vertical channel steel 1 and the horizontal channel steel 1'. Figures 2A and 2B show a plan view and a partially cutaway side view of the side formwork. In the figure, reference numeral 10 denotes a width-determining bar bridged between the crosspieces 8 and 9 made of apiton material at the upper part of the inner formwork A and the outer formwork H, and the inner formwork 8 and the outer formwork B are Frame moving brackets 20 and 21 are movably attached to both sides of the concrete side walls of the caisson, which have already solidified, so that they can be moved one after another by the step-up construction method. B and l4 are side templates made of larch plywood attached parallel to each other on the crosspiece I1 of the inner formwork No. 8 and the crosspiece l2 of the outer formwork H, and +5 and l6 are the shutters attached to the outside of the crosspieces II and 12, respectively. Ring beam, 17 is Severe Yu, +8 is KC Con. 20 and 2l are chains whose tension is adjusted by turnbuckles 22 suspended between the left and right shuttering beams 15 and between the shuttering rings J15 and 15 after iii, respectively; 23 is an IP pipe vibrator installed via a jack base 24 between the left and right shutter rings Jl5 and 15, and between the shuttering beams 15 and 15 after i};1. Reference numeral 25 denotes a scaffolding board, which is mounted across a bracket 26 installed on the inner shuttering beam I5. Figure 3A is an enlarged view of the punch frame of the bottom formwork, and the opening of Figure 3 is an enlarged view of the hatch frame of the side formwork. Attach the triangular members 30 and 3I of the hatch frame to the corners of the frame, place the face iron plates 32'' on the slopes of these triangular members, and use the nuts 33 and annealed iron V235 to raise the face iron plate 32. The +p pipe vibe 33 (Fig. 3 A) or the pier 34 (Fig. 3 B), which is a bridge across the 36, is installed on the pipe. Two crosspieces +7 and 17' are inserted between the shuttering beam and the side frame 50 made of larch plywood so as to be expandable and retractable in the longitudinal direction. The caisson A and the opening in Figure 5 are the large diameter wall 1 of the seventh end of the caisson a.
', This shows the case where part J is poured using a formwork in which the side wall of the existing caisson of part F is poured with concrete. In order to pour concrete into a cylindrical caisson a without a thick wall at the bottom of the caisson, place another caisson of the same small diameter above the side template 40 made of small diameter cylindrical larch plywood. Connect side pieces 40a made of larch plywood, and attach this side template 40a to a crosspiece 43 using a vault 41 and a nut 42.
Tie and secure. When pouring concrete into the large diameter thick part b of the caisson a, bolts 41. nut 42
Disassemble and remove the mold face plate 40a to expose the inclined plate 44 and straight plate 45 made of larch plywood that make the jaw part of the large diameter thick part. Concrete is placed on the inner surfaces of the inclined plate 44 and the vertical plate 45 via the crosspieces 47 using the L-end crosspieces 9. 48 indicates a wedge bolt provided on the shuttering beam. Further, the present invention can be used not only for placing concrete in caissons but also for placing concrete in general structures. [Effects of the Invention] The present invention utilizes a bent panel with a bottom punch as described above, thereby achieving uniform concrete pouring from the bottom wall to the side wall of the caisson, thereby preventing damage to the caisson due to R/L cracking. At the same time, when attaching and removing the width-determining bar that is fitted into the second part of the formwork-1, the width can be adjusted by installing a crosspiece 8.9 made of Apitong wood (hardwood) on the top of the side lm formwork. The accuracy of the formwork can be maintained even if the fixing bar is repeatedly installed and removed, and the accuracy of the formwork can be maintained. By increasing the number of times the formwork can be repurposed and by assembling the eye beam and shuttering beam to the upright material, it is possible to increase the number of times the formwork can be repurposed and to simplify the ground assembly (processing). In addition, by using face iron plates for the hatch frame and tightening them with nuts and annealed iron wire to piers bridged to the side formwork, bottom formwork, etc., QL pipe vibes, etc., it is possible to perform punch-style ground assembly quickly. is possible,
By using two side beams that can expand and contract with each other to adjust their length, it is easy to respond to different types of modifications to the caisson, and the thick concrete section of the upper part of the caisson It has excellent effects such as being able to easily perform concrete pouring by removing the cylindrical side formwork to which form plates are attached so that it can be disassembled and reassembled (Hachimaki T method).

[Brief explanation of drawings]

Figure 1A is a V-side view of the bottom frame of the formwork of the present invention, Figure IB is a partially cutaway view of the same L as seen from the inside, and Figure 1C is the same-
L vertical side view, Figure 2A is a plan view of the side frame of the invention H:J frame, Figure 2B is a partially cutaway view of the same, Figure 3A is a partially cutaway bottom frame. 's Punch Chic Enlargement 'The Picture, Part 3
Figure B is an enlarged plan view of the hatch frame of the side hatch with a part cut away, Figure 4 A is an enlarged front view of the joint crosspiece of the side hatch seen from the inside with a part cut away, and Figure 4 B is the same as above. The side view of FIG. 5A is an enlarged side view of the upper end of the side wall of the formwork shown with a part cut away, and the opening of FIG. Figure 3 Exit Figure 3 Opening Figure A Opening Figure 5 Exit

Claims (7)

[Claims] (1) A caisson mold made by assembling the left and right side formworks placed facing each other and the front and rear side formworks placed facing each other using upright timbers, single pipes, jack bases, and chains. The frame includes a bottom formwork 1 having an inwardly inclined inclined part 1a at the lower end and a vertical rising part 1b at the upper end, and a lower end inclined part 1a and an upper vertical rising part 1b on the outside of the bottom form 1. A caisson formwork characterized in that it is equipped with a bent panel 5 made of larch plywood bridged and pasted by crosspieces 3b, 3c, and 3d. (2) At the upper ends of the inner formwork A and the outer formwork B of the side formwork,
Claim (1) characterized in that the upper end crosspieces 8 and 9 made of Apitone material are provided with corner surfaces 8a and 9a for attaching and detaching the square step portions 10a and 10a' of the width determining bar 10. Caisson formwork as described. (3) The formwork for a caisson according to claim (1) or (2), wherein the side formboard of the side formwork is made of larch plywood. (4) The formwork for a caisson according to claim (1), (2) or (3), wherein the upright members are made up of eye beams 15', 16' and shuttering beams 15, 16. (5) Triangular member 3 whose hatch frame is provided on the end face of the side formwork
Claim (1) or (2) or (3) or (4) characterized in that it consists of a face iron plate 32 supported by 0 and 31, a nut 33, annealed iron wire 35, and a single pipe 33.
Caisson formwork as described. (6) Claim (1) or (2) or (3) or (4) or (5), characterized in that two crosspieces are mounted on the side formwork so that they can be slid on each other in the longitudinal direction. Caisson formwork as described. (7) A cylinder that can be attached and removed inside the thick-bodied side formwork at the upper end of the cylindrical side formwork that forms the thick-walled concrete part of the upper stage of the caisson. The caisson formwork according to claim 1, characterized in that a side formwork is attached.