JPS6030018Y2 - Formwork for forming concrete segments - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rectangular formwork for forming concrete segments used when constructing tunnels and the like.

Generally, when constructing various tunnels such as railway tunnels and underground tunnels, for example, as shown in Figure 1,
By pre-producing arc-shaped segments divided into three types: type, B type, and K type in a factory etc., these segments are sequentially assembled and connected one ring at a time at the tunnel excavation site. The inner peripheral surface of the tunnel to be constructed is lined.

By the way, when actually manufacturing this type of segment in a factory, etc., conventionally, steel molds of the A-type, B-type, and K-type segment forming angles are prepared separately, and these are prepared separately. The method used is to pour and fill concrete into each formed formwork to manufacture each desired segment.

However, in such a conventional method, as mentioned above, a large number of formworks for each type of segment forming angle of A type, B type, and K type must be prepared separately, and a large number of molds for each type must be prepared. Not only is the manufacturing cost of the formwork high, but it also requires time and effort to disassemble and assemble each formwork after the concrete has hardened. There have been various problems with promotion, such as the difficulty of centrally managing them.

The present invention was developed in consideration of the above-mentioned problems, and by structurally integrating the formwork for one ring of segments to be manufactured, it is possible to reduce the manufacturing cost of the formwork and at the same time reduce the mold cost. The present invention aims to provide a square formwork for forming concrete segments, which simplifies the disassembly and assembly of the frame itself and facilitates intensive management of promoting the curing of poured concrete.

``Hereinafter, one embodiment of the present invention will be described with reference to the attached FIGS. 2 and 3.

In addition, in the examples, for convenience of explanation, the A type shown in FIG. 1,
This is described as a formwork for shaping the bottom of a concrete segment with a total of six B-type and K-type segments for one ring.

In the figure, 1 is a formwork main body, and this formwork main body 1 has an upper edge 2a,
A pair of end plates 2 and 3 whose curvatures 3a are made equal to the curvature of the outer circumferential surface of the concrete segments to be formed (hereinafter referred to as segments), that is, the curvatures of the outer peripheral surfaces of each segment shown by A type, B type, and K type in Fig. 1. , is mainly composed of a pair of side plates 4, 5 connecting the longitudinal ends of the pair of end plates 2, 3, and a bottom plate 6 having an arcuate cross section equal to the curvature of the inner circumferential surface of the segment to be formed. , and these wife boards 2
, 3, the side plates 4, 5 and the bottom plate 6 are firmly connected to each other by means such as bolting or welding.

In addition, in this form body 1, the curvature of the upper and lower edges is the same as that of the upper edges 2a, 3a of the end plates 2, 3 and the inner surface 6a of the bottom plate 6.
A plurality of partition plates 7, each having a curvature equal to that of , and whose longitudinal width is equal to the width between the side plates 4.5, are arranged in parallel at intervals corresponding to the width of the segment to be formed. and each of these partition plates 7.・
... In between, bottom-shape both end surfaces in the circumferential direction of each segment to be formed.

A plurality of end plates for the molding are set respectively, thereby forming formwork chambers at bt k for one ring of three types, respectively.

Here, various methods can be considered as a means for positioning, that is, a method for connecting each partition plate 7 and each end plate, but in the embodiment, as shown in FIG.
Recessed grooves 7a are formed on both side surfaces of each partition plate 7, and the recessed grooves 7a are formed on both end edges of the other end plates 8.
. . . are formed to fit into the ridges 8 a .

Incidentally, reference numeral 9 indicates a mounting hole for mounting a core for forming a bolt hole in the segment to be formed.

Although not particularly shown, the connection of each of the partition plates 7 and each end plate, and the connection of each of the partition plates 7 and each end plate, etc.
... and each end plate 8... to the form body 1, if necessary, fastening means such as bolts may be additionally used as appropriate.

The operation of the formwork for forming concrete segments according to the present invention constructed as described above will be explained below.

First, the formwork for forming concrete segments according to the present invention is a formwork for one ring of segments to be formed by setting a plurality of partition plates 7 and end plates on the west side of the formwork body 1. xat b, k (total 6 in the example shown)
After setting the specified reinforcing bars, cores, etc. in the formwork chambers, pouring concrete or reit and allowing it to cure for a specified period of time, one ring can be formed at a time. A minute segment is formed.

This is important in terms of management, i.e., environmental protection when promoting the curing of concrete placed in the formwork room, uniformity of quality of the various manufactured segments, and confirmation and management of their numbers. This is particularly effective because the ring can be managed as one unit.

Furthermore, the partition plates 7 and the end plates 8 are assembled together using grooves 7a and ridges 8a formed in each of them. , these assembly and disassembly operations are very easy to perform, and the formwork corresponding to 1977 segments can be assembled and disassembled at one time.

Moreover, since the structure is simple in this way, the manufacturing cost of the formwork itself is significantly reduced.

In addition, in the above-mentioned example, the formwork of the segment consisting of 6 pieces for 1 ring was described, but this also applies to the formwork of the segment where 1 ring consists of 6 pieces or more. Of course, it can be formed in the same manner as above, and the method of connecting the partition plates 7, end plates, etc. may be changed as appropriate.

As detailed above, the formwork for forming concrete segments according to the present invention has a structure in which the formwork for the 11J song (segment to be manufactured) is structurally integrated, thereby reducing the manufacturing cost of the formwork itself. At the same time, disassembling and assembling the formwork itself is extremely easy, and it also has various excellent advantages, such as promoting the curing of poured concrete, ensuring uniform quality, and enabling intensive management of quantity control, etc. There is.

□.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing a concrete segment for one ring, Fig. 2 is a perspective view showing an embodiment of the present invention, and Fig. 3 is a diagram showing a partition, cutting plate, and end plate used in the same embodiment. It is a top view with some parts omitted. 1... Formwork body, 2゜3... End plate, 2a. a...Top edge, 4゜5...Side plate, 6...Bottom plate, 7...Partition plate, 7a...Concave groove, 9 b. k... Formwork room.

Claims (1)

[Scope of utility model registration request] A pair of end plates whose upper edges have a curvature equal to the curvature of the outer circumferential surface of the segment to be formed, a pair of side plates connecting these pair of end plates, and a curvature of the inner circumferential surface of the segment to be formed. A plurality of partition plates each having a curvature of the upper and lower edges equal to the curvature of the upper edge of the end plate and the inner surface of the bottom plate are arranged at intervals corresponding to the width of the segment to be formed, in a curvature main body consisting of a bottom plate having an arc-shaped cross section. square formwork for forming concrete segments, which are set in parallel with each other, and end plates for forming the end faces of the segments to be formed are set between these partition plates.