JPH0726408B2 - Invert block for manhole and construction method of invert - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

TECHNICAL FIELD The present invention relates to an invert block for a manhole, which is assembled and formed on a bottom slab in a body block located at a lower end portion of a manhole after building, and a method of constructing an invert.

[Prior art]

The first conventional construction method as the conventional invert block for this kind of manhole and the construction method of the invert is to install a bottom slab at a place for constructing a manhole, and then to form a cubic block having an inlet and an outlet on the bottom slab. A straight wall, a sloping wall, etc. are successively built in the height direction. Then, after attaching the inflow pipe and the outflow pipe to the body block, carry the concrete into the manhole from the upper opening of the constructed manhole with a bucket etc. and flow it in correspondence with the inflow pipe and the outflow pipe of the body block. An invert with a ditch is manufactured by hand. As a second conventional construction method, after the bottom slab is installed, the invert block 1 provided with the flow channel 2 in various directions of FIGS. 11A to 11E manufactured in advance in the factory is installed on the bottom slab, Next, there is a method of constructing a straight wall, a sloping wall, and the like in combination in the height direction sequentially from a hollow block provided with an inflow port and an outflow port. As a third conventional method, a product integrally manufactured with a bottom slab and an invert is commercialized.

[Problems to be Solved by the Invention]

In recent years, early completion is required for sewerage works such as manholes for excavating roads. However, in the first conventional method, an invert having a long road is manually manufactured, which requires a high level of technology and is time-consuming. Then, it takes one day to finish the work in only one place, and the work efficiency is poor. Further, in the second conventional construction method, the invert block placed inside during the work of attaching the inflow pipe and the outflow pipe becomes a hindrance to work. Furthermore, it is not possible to deal with the case where the angle between the inlet and the outlet changes after installation. That is, there is a problem in that workability is poor because it is necessary to prepare a body block or an invert whose angle of the inflow port and the outflow port are matched and to assemble it from the beginning. Further, the third conventional method cannot deal with the case where the angle between the inflow port and the outflow port is changed after the installation of the invert having the ready-made flow channel groove, and therefore, the same problem as the second method does. There is a point. Therefore, the present invention has been devised in view of the problems of the above-mentioned conventional techniques, and an object thereof is to provide an invert block for a manhole and an invert construction method that are easy to assemble and that can easily correct an angle change that occurs on site. It is what is said.

[Means for Solving the Problems]

In order to achieve the above object, in an invert block for a manhole and a method for constructing an invert according to the present invention, the first aspect of the present invention is that the manhole is divided into two parts so as to be insertable from an upper opening part of the manhole after the construction. A block to be assembled and laid in a manhole on a bottom plate, the block having a predetermined thickness and having a substantially fan shape close to a semicircle having an arc portion having substantially the same curvature as the inner diameter of the hollow block. However, a flow path groove corresponding to the inflow or outflow pipe of the block is provided, and when the pair of blocks are combined, the ends are joined to form a circular shape, and a gap is formed between the opposite ends of the remaining part. It is configured to be formed. A second invention relates to a method of constructing an invert for a manhole, wherein the manhole invert block of the first invention is arranged on a bottom slab in a body block to be carried in from an upper opening of the manhole after construction, and a flow channel groove is provided. After aligning with the inflow and outflow pipes of the block, fill the space between the opposing ends of the block with a filler such as cast-in-place concrete or mortar to form a part of the flow path and invert surface, The gap between the body blocks is also filled with mortar. A third invention is a block and an auxiliary block that are radially divided into a plurality of sizes that can be inserted from the upper opening of the manhole after construction and are assembled and arranged in the manhole on the bottom plate in the cube block. The block is formed to have a predetermined thickness and is formed into a substantially fan shape having an arc portion having substantially the same curvature as the inner diameter of the rectangular block, and has flow passage grooves corresponding to the inflow and outflow pipes of the rectangular block. The auxiliary block has substantially the same thickness as the block, and is formed in a substantially fan shape having an arc portion having a curvature substantially the same as the inner diameter of the rectangular block. A fourth invention relates to a method for constructing an invert for manholes, in which the block and the auxiliary block of the third invention are radially arranged on a bottom slab in a body block which is carried in from an upper opening portion of the manhole after construction, and a flow path is provided. Influx of body blocks,
After aligning with the outflow pipe, fill the gap between the block and the auxiliary block with a filling material such as cast-in-place concrete or mortar to form a part of the flow path and invert surface, and also in the gap on the arc body and the block side. It is configured to be filled with mortar.

In the manhole 5, after placing the bottom plate 54 on the foundation 55, the body block 6 is placed on the bottom plate 54.
A straight wall 53, a sloping wall 52, and a manhole receiving frame 51 are sequentially assembled on the upper side in the height direction. Next, the invert block 3 is carried in from the upper opening of the built manhole 5 and is assembled in the manhole 5. When the inlet 61 and the outlet 62 of the body block 6 are provided at one place each, a pair of symmetrical invert blocks 31 and 32 corresponding to the flow passage 4 from 180 to 135 degrees are used, and FIG. As shown in FIG.
After forming the linear flow path 4 by aligning the flow path groove 41 with the outflow port 62 and the flow path groove 62, the filler 7 such as concrete or mortar is filled in the gap between the opposite ends of the three parts between the invert blocks 31 and 32. . In addition, the mortar 71 is also placed in the gap between the circular arc portion 36 and the flexible block 6.
To fill. At that time, a part of the flow path 4 and the inversion surface is manually manufactured. Also, the invert blocks 33, 34 shown in FIGS.
Is provided with the flow channel groove 42 corresponding to the flow channel 4 from 135 ° to 90 °, and the flow channel 4 is formed in the same manner by combining these. 10a to 10g show an invert formed by combining with the invert block 35 of FIG. 9a and the auxiliary block 8 of FIG. 9c, Y type (FIG. 10a, b), T type (same). Figures d, e),
It is possible to form the flow path 4 in various variations of a cross shape (g in the figure) and others (c and f in the figure). In addition, the dotted line part of each figure has shown a part of flow path 4 manufactured by hand.

【Example】

Examples will be described with reference to the drawings. 3, 5 and 6 relate to the first and second inventions, FIGS. 4, 7 and 8 relate to another embodiment of the same invention, and FIGS. 9 and 10 relate to the third and fourth inventions. . In FIG. 1, the manhole 5 includes a bottom plate 54 on a foundation 55.
After arranging, the black block 6 is placed on the bottom plate, and the straight wall 53, the slanted wall 52, the manhole receiving frame are placed on the black block 6.
51 are assembled by being sequentially assembled in the height direction. In this case, the diameter of the upper opening of the manhole receiving frame is 60 cm.
Steps 56 for working are installed on the straight wall 53 and the sloping wall 52 above the black block 6 in the manhole 5. As shown in FIGS. 3, 5, and 6, the invert block 3 of the first invention is provided with one inflow port and one outflow port, and corresponds to 180 to 135 degrees. The invert blocks 31 and 32 are symmetrically divided into two parts that can be inserted from the upper opening of the manhole 5 after construction, and are assembled and laid in the manhole 5 on the bottom plate 54 in the body block 6. . The blocks 31 and 32 are formed to have a predetermined thickness which is approximately the same as the thickness at the time of concrete pouring, and are formed in a substantially fan shape close to a semicircle having an arc portion 36 having substantially the same curvature as the inner diameter of the hollow block 6. . In addition, the blocks 31 and 32 are provided with flow passage grooves 41 corresponding to the inflow or outflow pipes 61 and 62 of the metal block 6, and are opposed to each other when a pair of symmetrical blocks 31 and 32 are combined. The end A is joined to form a circular shape, and a gap is formed between the remaining opposite ends B. FIGS. 4, 7 and 8 show another embodiment of the first invention, in which there is one inlet and one outlet, respectively, from 135 degrees to 90 degrees.
A pair of symmetrical invert blocks 33, 34 having a flow path groove 42 corresponding to the angle. The pair of manhole invert blocks 31, 32 or 33, 34 of the first invention is arranged on the bottom plate 54 in the body block 6 which is carried in from the upper opening of the manhole 5 after construction, and the channel groove 41 is provided. , 42 between the inflow and outflow of the body block 6,
After aligning with 62, the gap between the opposing ends of the blocks 31, 32 or 33, 34 is filled with a filling material 7 such as cast-in-place concrete or mortar to form a part of the flow path 4 and the invert surface, The mortar 71 is also filled in the gap between the six windings of the circular arc portion 36 and the curved block. FIGS. 9 and 10 relate to the third and fourth inventions and are constructed by combining the block 35 and the auxiliary block 8. The block 35 and the auxiliary block 8 are radially divided into a plurality of sizes that can be inserted from the upper opening of the manhole 5 after construction, and are assembled in the manhole 5 on the bottom plate 54 in the body block 6. It is to be laid. The block 35 is formed to have a predetermined height which is about the height when concrete is poured, and is formed in a fan shape so as to have an arc portion 36 having substantially the same curvature as the inner diameter of the cube block 6, so that the inflow of the cube block 6 is made. Flow passage grooves 43 corresponding to the pipe 61 and the outflow pipe 62 are provided. The auxiliary block 8 has substantially the same height as the block 35, has an arc portion 36, and is formed in a substantially fan shape. In addition, in the case of construction of a manhole invert constructed by assembling the block 35 and the auxiliary block 8, the block 35
The auxiliary block 8 and the auxiliary block 8 are radially arranged on the bottom slab 54 in the body block 6 into which the manhole 5 is to be carried in after the construction, and the flow path groove 43 is provided with the inflow pipe 61 and the outflow pipe 62 of the body block 6.
After the alignment to the block, the filling material 7 such as cast-in-place concrete or mortar is placed in the gap tube of the block 35 and the auxiliary block 8.
To form a part of the flow path 4 and the invert surface. In addition, the space tube between the arcuate portion 36 and the cylindrical block 6 is also mortar.
Filled with 71. The block 35 and the auxiliary block 8 are U-shaped (FIGS. 10A and 10B), T-shaped (FIGS. 10D and 10E), as shown in FIGS.
It is formed in the flow path 4 of various variations such as a cross shape (g in the figure) and others (c and f in the figure).

【The invention's effect】

Since the manhole invert block and the invert construction method of the present invention are configured as described above, the following effects can be obtained. (1) It is possible to cope with various variations of flow paths by combining the invert blocks with each other and combining the invert block with the auxiliary block. (2) It is possible to cope with the angle deviation that occurs at the site without significantly changing the image of the handmade invert. Moreover, it is possible to complete the same state of invert easily and in a short period of time regardless of who makes it. That is, in the case of the conventional handmade invert, only one skilled craftsman could work in the manhole for one day and finally complete only about one place, but if the invert block of the present invention is used, the workability is significantly improved. Improved to
Moreover, it is an extremely useful invention that can significantly reduce the burden on the worker. (3) Loading into the manhole and assembling in the manhole are easy, and it is possible to easily correct the angle change of the flow path that occurs at the site.

[Brief description of drawings]

1 and 2 are central longitudinal sectional views of the manhole of the present invention, FIG. 3a is a plan view of one of the pair of invert blocks of the first invention, and FIG. 3c is a plan view of the other invert block, FIG. 3d is a front view thereof, FIG. 4a is a plan view of one invert block of another embodiment, and FIG. 3b is a front view thereof. Is a plan view of the other invert block, FIG. 5 d is a front view thereof, FIG. 5 a is a plan view when the invert is constructed, FIG. 5 b is a front view, and FIG. 6 is a plan view when the same is constructed, FIG. 7 and FIG. 8 are plan views of another embodiment in the installed state, FIG. 9a is a plan view of the block of the third invention, FIG. 9b is its front view, and FIG. The figure, the same figure d is the front view, and FIG. 10 a-g is the combination of a block and an auxiliary block. Plan view of the inverter when the construction in Align, FIG. 11 a~e is a plan view of the inverter having a channel groove fabricated in the conventional example of plants. Explanation of code 3,31,32,33,34: Invert block, 35: Block, 4:
Flow passage, 41, 42, 43: Flow passage groove, 5: Manhole, 51: Manhole receiving frame, 52: Oblique wall, 53: Straight wall, 54: Bottom plate, 55: Foundation, 6: Cubic block, 61: Inlet port , 62: outlet, 7: concrete or mortar, 8: auxiliary block.

Claims (4)

[Claims] 1. A block divided into two parts that can be inserted from an upper opening of a manhole after building and assembled and laid in a manhole on a bottom plate in a rectangular block, the block having a predetermined thickness. The pair of blocks is formed to have a substantially fan-like shape close to a semicircle having an arc portion having substantially the same curvature as the inner diameter of the hollow body block, and is provided with a flow channel groove corresponding to the inflow or outflow pipe of the hollow body block. When combined with each other, a manhole invert block configured to have a circular shape by joining part of opposite ends and to form a gap between the remaining opposite ends. 2. An inflow / outflow pipe for the manhole block, wherein the manhole invert block according to claim 1 is arranged on a bottom slab in the body block which is carried in from the upper opening of the manhole after construction. After that, the filling material such as cast-in-place concrete or mortar is filled between the opposite end gaps of the block to form a part of the flow path and the invert surface,
A method for constructing an invert for manholes, in which mortar is also filled in the gaps between the circular arc-shaped blocks. 3. A block and an auxiliary block that are radially divided into a plurality of sizes that can be inserted from the upper opening of the manhole after building and are assembled and arranged in the manhole on the bottom plate in the rectangular block. The block is formed to have a predetermined thickness and is formed in a substantially fan shape having an arc portion having substantially the same curvature as the inner diameter of the rectangular block, and is provided with flow channel grooves corresponding to the inflow and outflow pipes of the rectangular block. The auxiliary block for a manhole, wherein the auxiliary block has a substantially same thickness as that of the block, and is formed in a substantially fan shape having an arc portion having substantially the same curvature as the inner diameter of the rectangular block. 4. The block according to claim 3 and the auxiliary block are radially arranged on the bottom slab in the body block for carrying in from the upper opening of the manhole after the construction, and the flow-in groove flows into the body block. After aligning with the outflow pipe, the gap between the block and the auxiliary block is filled with a filling material such as cast-in-place concrete or mortar to form a part of the flow path and invert surface, and also in the gap between the arc-shaped block and the block. A method for constructing a manhole invert made by filling mortar.