JP3165749U - manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole structure in which a bottom slab is hard to be damaged, and even if the bottom slab is damaged, the cost is low and the bottom slab can be reinforced or easily repaired. SOLUTION: A mortar 18 is poured onto a bottom slab 13, and a plurality of constituent pieces 161 are placed therein to form a bottom slab reinforcing plate, and an insertion hole for a locking portion 162 provided on the outer peripheral edge of the bottom slab reinforcing plate. An anchor is inserted into the skeleton block 11, the bottom slab reinforcing plate is locked to the skeleton block 11, and mortar is poured onto the bottom slab reinforcing plate to form an invert 12. [Selection diagram] Fig. 3

Description

  The present invention relates to a sewer manhole.

  FIG. 1 shows a standard configuration of a sewer manhole that is generally used at present. 1 is a manhole cover, 2 is a manhole cover receiving frame, 3 is a height adjustment ring, 4 is a slanted wall, 5 Is a straight wall, 6 is a housing block, 7 is an invert, 8 is a bottom plate, 9 is an inflow pipe, and 10 is an outflow pipe, which are generally joined together by an adhesive or the like.

  However, as shown in FIG. 1, since the manhole has a structure in which the respective structures are stacked on the bottom plate 8, the load applied to the bottom plate 8 is considerable, and a car or the like moves over the manhole. The influence of vibration generated when passing through is not small, and therefore the bottom plate 8 is more easily damaged than other manhole components. The bottom plate 8 is the base of the manhole. In the case of existing manholes, the bottom plate has deteriorated over time. If the bottom plate is damaged due to the above reasons, or if the bottom plate is damaged, the sewage from the sewer will leak and the groundwater and soil will There were problems such as contamination.

  And in recent years, the number of damage to the bottom plate has increased remarkably, and measures to improve it have been demanded. However, it takes a lot of money to replace the entire manhole, so there is a need for a means to rehabilitate at low construction costs. Yes.

Japanese Utility Model Publication No. 1-6565345

  Accordingly, an object of the present invention is to provide a manhole structure in which the bottom plate is not easily damaged, and the bottom plate can be reinforced or easily repaired even if it is damaged.

  The present invention has been made in order to solve the above-mentioned problems. The invention according to claim 1 is a manhole characterized in that a bottom plate reinforcing plate made of cast is provided on the bottom plate, and an invert is formed thereon. is there.

  The invention described in claim 2 is the manhole according to the invention described in claim 1, wherein the bottom plate reinforcing plate is constituted by a plurality of constituent pieces.

  The invention described in claim 3 is the manhole according to claim 1 or 2, wherein the bottom plate reinforcing plate is provided with a locking portion for locking to the frame block.

  According to the invention described in claim 1, since the bottom plate can be reinforced by providing a bottom plate reinforcing plate made of a casting and forming an invert on the cast plate, durability against vibration and load is increased. It is difficult for cracks to occur even with aging, and leakage of sewage can be prevented.

  Further, according to the invention described in claim 2, it is possible to easily perform the work of attaching the plate for reinforcing the bottom plate, particularly at the time of repairing the bottom plate of the existing manhole.

  According to the third aspect of the present invention, the bottom plate reinforcing plate is provided with the straight wall engaging portion that engages with the straight wall, thereby improving the reaction force of the bottom plate and enhancing the durability against vibration and load. be able to.

  According to the first to third aspects of the present invention, it is possible to easily reinforce the bottom slab and improve leakage prevention without replacing the entire manhole with respect to the existing manhole.

A longitudinal section of a standard manhole. The top view of the 1st Example of this invention. FIG. 3 is a sectional view taken along line AA in FIG. 2. FIG. 3 is a plan view of a bottom plate reinforcing plate in the first embodiment shown in FIG. 2. FIG. 5 is a front view of a bottom plate reinforcing plate in the first embodiment shown in FIG. 4. The top view of the 2nd Example of this invention. BB sectional drawing of FIG. FIG. 7 is a plan view of a bottom plate reinforcing plate in the second embodiment shown in FIG. 6. FIG. 9 is a front view of a bottom plate reinforcing plate in the second embodiment shown in FIG. 8. The top view of the 3rd Example of this invention. CC sectional view taken on the line shown in FIG. The top view of the 4th Example of this invention. The DD sectional view taken on the line of FIG.

  2 is a plan view of the first embodiment of the present invention, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, 11 is a manhole housing block, 12 is an invert, 13 is a bottom plate, 14 is an inflow pipe, 15 Is an outflow pipe, 16 is a bottom plate reinforcing plate made of casting, 17, 17, 17, and 17 are anchors for fixing the bottom plate reinforcing plate 16 to the housing block 11, and 18 is a connection between the bottom plate reinforcing plate 16 and the bottom plate 13. A mortar placed in between.

  4 and 5 are a plan view and a front view of the bottom plate reinforcing plate according to the first embodiment of the present invention. 161, 161, 161, 161 are constituent pieces constituting the bottom plate reinforcing plate 16, 162, 162, respectively. Reference numerals 162 and 162 denote locking portions provided on the outer peripheral edge of the bottom plate reinforcing plate 16 for locking with the housing block 11, and reference numerals 163 and 163 denote insertion holes for inserting the anchors 17 provided on the locking portion 162. It is. In this embodiment, the bottom plate reinforcing plate 16 is divided into four component pieces, but the number of divisions is not limited to this embodiment.

  At the time of manufacturing the manhole, a mortar 18 is placed on the bottom plate 13, and the component pieces 161, 161, 161, 161 are placed on the mortar 18 to form the bottom plate reinforcing plate 16, and the anchor 17 is inserted into the insertion hole 163. An anchor 17 is embedded in the block 11 and the bottom plate reinforcing plate 16 is locked to the housing block 11. Then, mortar is poured onto the bottom plate reinforcing plate 16 to constitute the invert 12. In the case of repairing an existing manhole, the invert 12 is removed, the mortar 18 is placed on the bottom plate 13, the bottom plate reinforcing plate 16 is laid, and the anchor 17 is engaged with the housing block 11 to form the invert 12. To do. In addition, according to the shape of the invert 12, the bottom plate reinforcing plate 16 is appropriately provided with a water flow path so as not to obstruct sewage flowing from the inflow pipe 14 to the outflow pipe 15.

  According to this embodiment, since the strength of the bottom plate 13 can be reinforced by providing the bottom plate reinforcing plate 16 on the bottom plate 13, the durability against vibration and load is increased, and a crack is caused even with deterioration over time. Hateful. Further, by providing the bottom plate reinforcing plate 16 with an engaging portion that engages with the housing block 11, a reaction force of the bottom plate 13 is generated, and durability against vibration and load can be enhanced.

  In the case of an existing manhole, since the bottom plate reinforcing plate 16 is divided, the bottom plate reinforcing plate can be easily inserted into the manhole from the entrance of the manhole, and after the existing invert is removed, the bottom plate reinforcing plate 16 is placed on the bottom plate. By installing the bottom plate reinforcing plate and performing inversion again, the manhole according to the present invention in which the bottom plate is reinforced can be easily and inexpensively implemented without removing the existing manhole.

  FIG. 6 is a plan view of a second embodiment of the present invention, FIG. 7 is a cross-sectional view taken along line BB shown in FIG. 6, 11 'is a manhole housing block, 12' is invert, 13 'is a bottom plate, 14' Is an inflow pipe, 15 'is an outflow pipe, 16' is a cast bottom plate reinforcing plate, 17 ', 17', 17 ', 17' are anchors for fixing the bottom plate reinforcing plate 16 'to the housing block 11'. , 18 'is a mortar placed between the bottom plate reinforcing plate 16' and the bottom plate 13 '.

  FIGS. 8 and 9 are a plan view and a front view of the second embodiment of the bottom plate reinforcing plate of the present invention, wherein 161 ′, 161 ′, 161 ′, 161 ′ are constituent pieces constituting the bottom plate reinforcing plate 16, 162 ′, 162 ′, 162 ′, 162 ′ are locking portions for locking with the housing block 11 ′, and 163 ′, 163 ′ are insertions for inserting an anchor 17 ′ provided in the locking portion 162 ′. It is a hole. In this embodiment, the bottom plate reinforcing plate 16 'is divided into four component pieces, but the number of divisions is of course not limited to this embodiment.

  The construction of the manhole is substantially the same as in Example 1, except that the bottom plate 13 ′ is cut by the thickness of the bottom plate reinforcing plate 16 ′, and the mortar 18 ′ is poured onto the bottom plate 13 ′ of the shaved portion. The bottom plate reinforcing plate 16 ′ is configured by placing the constituent pieces 161 ′, 161 ′, 161 ′, 161 ′ constituting the bottom plate reinforcing plate 16 ′, and the anchor block 17 ′ is inserted through the insertion hole 163 ′. 'Anchor 17' is embedded in 'bottom plate reinforcing plate 16' and the frame block 11 'is locked.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained even when the bottom surfaces of the inflow pipe and the outflow pipe are in the same position as the top surface of the bottom plate.

  FIG. 10 is a plan view of a third embodiment of the present invention, FIG. 11 is a cross-sectional view taken along the line CC of FIG. An inflow pipe, 15 "is an outflow pipe, 16" is a cast and disc-shaped bottom plate reinforcing plate, 161 ", 161", 161 ", 161" are constituent pieces constituting the bottom plate reinforcing plate 16 ", and 18" is This is a mortar for filling the gap between the bottom plate reinforcing plate 16 "and the bottom plate 13". In this embodiment, the bottom plate reinforcing plate 16 ″ has an outer diameter larger than the inner diameter of the housing block 11 ″, and the bottom plate reinforcing plate 16 ″ is divided into four component pieces. Of course, the present invention is not limited to this embodiment.

  At the time of manufacturing the manhole, a concave portion is formed in the bottom plate 13 ″ by the thickness of the bottom plate reinforcing plate 16 ″ and the thickness of the mortar 18 ″. In the case of an existing manhole, the concave portion or the shaved portion A mortar 18 ″ is poured onto the bottom plate 13 ″, and component pieces 161 ″, 162 ″, 161 ″, 161 ″ constituting the bottom plate reinforcing plate 16 ″ are placed thereon to form the bottom plate reinforcing plate 16 ″. The block 11 ″ is placed so as to cover the bottom plate reinforcing plate 16 ″. Then, mortar is poured onto the bottom plate reinforcing plate 16 ″ to constitute the invert 12 ″.

  According to the present embodiment, the reaction force of the bottom plate is generated because the end portion of the bottom plate reinforcing plate is pressed by the housing block without providing the locking portion with the housing block, and the same effect as in the first embodiment is obtained. Obtainable.

  In the case of existing manholes, after removing the existing invert, the bottom plate reinforcing plate is divided even after the bottom plate is shaved by the thickness of the bottom plate reinforcing plate and the thickness of the mortar. It can be easily installed if it is inserted so as to sink in, and the assembly manhole of the present invention in which the bottom plate is reinforced can be easily and inexpensively performed without forming the entire existing manhole by forming the invert again. can do.

  FIG. 12 is a plan view of the fourth embodiment of the present invention, and FIG. 13 is a sectional view taken along the line DD shown in FIG. 12, in which the bottom plate reinforcing plate of Embodiment 3 is included in the bottom plate. is there.

11 Housing Block 12 Invert 13 Bottom Plate 14 Inflow Pipe 15 Outflow Pipe 16 Bottom Plate Reinforcement Plate 16 Component Piece 162 Locking Part 163 Insertion Hole 17 Anchor 18 Mortar

Claims (3)

A manhole characterized in that a bottom plate reinforcing plate made of casting is provided on the bottom plate, and an invert is formed thereon. 2. The manhole according to claim 1, wherein the bottom plate reinforcing plate is composed of a plurality of constituent pieces. 3. A manhole according to claim 1, wherein said bottom plate reinforcing plate is provided with a locking portion for locking to the housing block.

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