JP2007169975A - Pc concrete foundation plate for underground buried septic tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a PC (precast) concrete foundation plate for an underground buried septic tank considerably reducing a construction period and a construction cost of septic tank burying work and attaining labor saving and uniformization of the burying work. <P>SOLUTION: The PC concrete foundation plate 12 for the underground buried septic tank has hanging holes 13 opened to the upper face; foundation plate lifting hangers 14 disposed in the hanging holes 13; fastening plates 17 integral with the foundation plate 12 and exposed on one side face or two opposed side faces of the foundation plate 12; and bolt lead-in holes 19 opened to one end upper edge part or both end opposed upper edge parts of the foundation plate 12, corresponding to the fastening plates 17. The fastening plate 17 is brought into contact with the fastening plate 17 of the adjacent foundation plate 12, and a bolt 22 is inserted and fastened into bolt fastening holes of the fastening plates 17 through the bolt lead-in holes 19 to connect the adjacent foundation plates 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a PC concrete foundation plate for placing the bottom surface of a septic tank buried in the ground.

  As shown in FIG. 1B, a septic tank 1 for treating drainage from toilets, kitchens, baths, etc. is buried in the ground, and the bottom surface of the septic tank is placed on the foundation concrete buried in the ground. Construction is performed in which a manhole cover 2 provided on a wall is arranged on the upper surface of the upper slab concrete 3.

  More specifically, as shown in FIG. 1A, the septic tank burial hole 4 is excavated using a heavy machine, the sheet pile 5 is driven along the inner peripheral surface of the septic tank burial hole 4, and the sheet pile 5 is raised and supported by the beam 6. 1B, as shown in FIG. 1B, the crushed stone 7 is laid on the inner bottom surface of the septic tank burying hole 4 and solidified. After passing through the curing and curing period of the discarded concrete 8, reinforcing bars 9 are arranged on the upper surface of the discarded concrete 8 to form a formwork, and a bottom slab concrete 10 is cast in the moldwork, and an upper surface of the bottom slab concrete 10 is disposed. After finishing the curing period of the bottom slab concrete 10, the sheet pile 5 and the erection beam 6 are removed, the septic tank 1 is supported on the bottom slab concrete 10 and backfilled. The cleat 3 is doing the construction work to be pouring.

  However, in the conventional septic tank burial work, as explained in the background art, the reinforcement work, the on-site work of the foundation concrete, that is, the on-site work of the discarded concrete 8 and the bottom slab concrete 10 and the top surface of the bottom slab concrete 10 are uniformly finished. The work to perform is indispensable, and further requires a curing and curing period for both concretes 8 and 10, which takes a long construction period as a whole, and requires skill in the construction.

  Therefore, there is a problem that the construction cost of the septic tank burial work is high.

  This invention provides the base plate made from PC concrete for underground septic tanks which solves the said problem effectively.

  The foundation plate made of PC concrete for the underground septic tank has a suspension hole that is open on the upper surface and a suspension that is integral with the foundation plate disposed in the suspension hole.

  Further, a bolt fastening plate integral with the base plate is provided on one side surface or two opposite side surfaces of the base plate, and a bolt fastening hole is provided in the bolt fastening plate. The part has a bolt introduction hole that contacts and opens the back surface of the bolt fastening plate.

  The bolt fastening plate is made to face the bolt fastening plate of the adjacent base plate, the bolt is inserted into the bolt fastening hole through the bolt introduction hole and fastened, and the adjacent base plates are connected to each other. It comprises, and it is set as the structure which mounts the said septic tank so that it may straddle both base plates.

  According to the present invention, it is possible to remove the factors such as on-site reinforcement and foundation concrete placement and leveling work, the progress of the curing period, etc., which required the most work period and technology in the septic tank burial work, and the work period in the septic tank burial work And a significant reduction in construction costs can be achieved, and labor saving and rationalization of septic tank burial work can be achieved.

  In addition, homogenization of the most important foundation concrete in the septic tank burial work is achieved, and the effect of preventing as much as possible the subsidence and cracking of the foundation concrete, which has been generated in the past, and the tilting and cracking of the septic tank associated therewith as much as possible.

  In addition, the unit base plate is assembled by connecting two or three unit base plates and mounting the septic tank, so that the unit base plate is significantly reduced in weight, improved in workability, and easy to handle. A solid base plate connector can be easily formed by fastening the bolts.

  The best mode for carrying out the present invention will be described in detail below with reference to FIGS.

  Reference numeral 12 denotes a rectangular PC concrete foundation plate (precast concrete foundation plate) for an underground septic tank. As shown in FIGS. 2 to 5, the foundation plate 12 includes a plurality of suspension holes 13 opened on the upper surface. A suspension 14 integral with the foundation plate 12 disposed in the suspension hole 13 is provided.

  The foundation plate 12 is made of reinforced concrete formed in advance at the factory with reinforcing bars 15 arranged therein, and the suspension holes 13 and the suspension hands 14 are arranged at the four corners of the foundation plate 12 when the foundation plate 12 is formed. .

  The suspension 14 has sufficient play in the suspension hole 13 and is arranged so as not to protrude from the upper surface of the base plate 12, and the suspension 14 is inserted into the suspension hole 13 by the play and is hung on the suspension 14. Stop and lift or install the foundation plate 12.

  As the suspension 14, suspension fittings having various structures can be applied. In this embodiment, a stud pin is used, and the lower end of the stud pin is integrated with the bottom concrete of the suspension hole 13 when the foundation plate 12 is formed. Embedded in the suspension hole 13.

  Further, as shown in FIGS. 2A and 2B and FIG. 4, a plurality of bolt fastening plates 17 integral with the foundation plate 12 exposed on one side surface of the foundation plate 12 are provided. The bolt fastening plate 17 is disposed on one side surface of the base plate 12 with an interval in the width direction.

  As another example, as shown in FIGS. 3A and 3B and FIG. 5, a plurality of bolt fastening plates 17 integral with the foundation plate 12 exposed on the two opposite side surfaces of the foundation plate 12 are provided. The bolt fastening plate 17 is disposed on one side surface and the other side surface of the base plate 12 with an interval in the width direction.

  A bolt fastening hole 18 is provided in the bolt fastening plate 17, and a plurality of bolt introduction holes 19 that are in contact with and open to the back surface of the bolt fastening plate 17 are provided in the upper edge portion of one end of the base plate 12 or the upper edge portions of both ends.

  The bolt fastening hole 18 is preferably a female screw hole, and the unit base plates 12 described later are connected to each other while a bolt 22 is screwed into the female screw hole 18.

  The bolt fastening plate 17 is arranged so as to be flush with the side surface of the base plate 12, leg plates 20 are extended from both ends of the bolt fastening plate 17, and anchor reinforcing bars 21 are welded to the leg plates 20 to extend backward. The leg plate 20 and the anchor reinforcing bar 21 are embedded in the concrete when the foundation plate 12 is formed, and the bolt fastening plate 17 is firmly supported integrally with the foundation plate 12. Similarly, the bolt introduction hole 19 is integrally formed when the foundation plate 12 is concrete-formed.

  The suspension hole 13, the hand 14, the bolt fastening plate 17, the bolt fastening hole 18, and the bolt introduction hole 19 are centered on two straight lines parallel to the side surface of the rectangular base plate 12, as shown in FIGS. 2A and 3A. They are arranged side by side. Therefore, the suspension hole 13 and the suspension hand 14 are disposed between the anchor reinforcing bars 21.

  As shown in FIGS. 6, 7, 10, and 11, the side surfaces of the two unit base plates 12 having the structures of FIGS. 2 and 4 are in contact with each other, and the bolt fastening plates 17 are in contact with each other. By inserting bolts 22 into the bolt fastening holes 18 through the bolt introduction holes 19 and tightening the nuts, the fastening plates 17 and 17 are superposed and fastened to connect the adjacent base plates 12 to each other, thereby connecting one base plate assembly. 11, and the left half of the septic tank 1 is placed on one unit base plate 12 and the right half is placed on the other unit base plate 12 as shown in FIG. 13A. .

  As another example, as shown in FIGS. 8, 9, 10, and 11, a central unit base plate 12 having the structure of FIGS. 3 and 5 and a left and right unit base plate 12 having the structures of FIGS. In addition, one side surface of the left and right unit base plates 12 is in contact with two opposite side surfaces of the central unit base plate 12, the bolt fastening plate 17 is in contact with each other, and a bolt is inserted into the bolt fastening hole 18 through the bolt introduction hole 19. By inserting and tightening the nuts, the fastening plates 17 and 17 are overlapped and fastened to connect the three adjacent base plates 12 to form one base plate connecting body 11, as shown in FIG. The central portion of the septic tank 1 is placed on the central unit base plate 12 and the left and right ends are placed on the left and right unit base plate 12.

  Next, the burying work of the septic tank 1 will be described. As shown in FIG. 12A, the septic tank burying hole 4 is excavated, and as shown in FIG. The base plate 12 is lifted and mounted on the upper surface of the layer by using the hand 14.

  At this time, it is possible to save the conventional discarded concrete 8 to be placed on the upper surface of the seven layers of split crushed stone. The upper and lower surfaces of the foundation plate 12 are finished flat at the time of factory forming. If the upper surface of the seven layers of split stone is finished flat, the foundation plate 12 is placed directly on the upper surface of the seven layers of crack stone without discarding concrete 8. it can.

  However, the present invention does not exclude the case where the depth is adjusted by throwing away concrete on the upper surface of the seven layers of split stone.

  As shown in FIGS. 6 and 8, the base plate 12 is connected to each other on the ground to form the base plate connector 11, and then can be installed in the buried hole 4. Alternatively, the unit base plates 12 can be inserted into the embedding holes 4 one by one, and the unit base plates 12 can be aligned while being lifted, and the unit base plates 12 can be connected within the embedding holes 4.

  Immediately after installation of the foundation plate coupling body 11, the septic tank 1 is placed on the foundation plate coupling body 11, and as shown in FIG. 12C, the embedding hole 4 is backfilled, and the slab concrete 3 is placed. The manhole cover 2 of the septic tank 1 is exposed on the upper surface of the slab concrete 3.

  As shown in FIG. 13, the base plate connector 11 projects in the left and right and front and rear sides of the septic tank 1, and is arranged so that the suspension holes 13 and the suspension hand 14 on one end side and the other end side are present on the projecting end, and will be necessary later. Can be lifted according to

  Similarly, it arrange | positions so that the fastening part by the volt | bolt 22 may exist in the said overhang | projection end, at least vicinity of the bottom of the septic tank 1. FIG.

A is sectional drawing explaining the excavation state of the burial hole in septic tank burial construction, B is sectional drawing explaining the basic structure of the septic tank embed | buried in the said conventional burial hole. A is a top view which shows an example of the foundation plate made from PC concrete for underground septic tanks concerning this invention, B is the side view. A is a top view which shows the other example of the foundation plate made from PC concrete for underground septic tanks concerning this invention, B is the side view. AA sectional view taken on the line in FIG. BB sectional drawing in FIG. The top view of the foundation plate coupling body formed using the foundation plate shown in the said FIG. The side view of the said base plate. The top view of the foundation plate coupling body formed using the foundation plate shown in the said FIG. The side view of the said base plate. The enlarged plan view of the connection part of the base plate coupling body shown in the said FIG. 6, FIG. The expanded sectional view of the connection part of the foundation plate coupling body shown in the said FIG. 6, FIG. A, B, and C are sectional views for explaining septic tank burying construction using the above-mentioned base plate connector. A is a top view explaining the support state of the septic tank on the said base plate coupling body shown in FIG. 6, B is a top view explaining the support state of the septic tank on the said base plate coupling body shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Septic tank, 2 ... Manhole cover, 3 ... Slab concrete, 4 ... Septic tank embedding hole, 7 ... Split chestnut stone, 11 ... Foundation plate coupling body, 12 ... Foundation plate, 13 ... Suspension hole, 14 ... Suspension hand, 15 ... Reinforcing bar, 16 ... suspension, 17 ... bolt fastening plate, 18 ... bolt fastening hole, 19 ... bolt introduction hole, 20 ... leg plate, 21 ... anchor reinforcing bar, 22 ... bolt.

Claims (1)

A PC concrete foundation plate for placing the bottom surface of a septic tank buried in the ground, the foundation plate having a suspension hole opened on the top surface, and a foundation plate integrated with the foundation plate disposed in the suspension hole A lifting hand for lifting, a bolt fastening plate integral with the foundation plate on one side or two opposite sides of the foundation plate, a bolt fastening hole provided in the bolt fastening plate, and one end of the foundation plate There is a bolt introduction hole that opens in contact with the back surface of the bolt fastening plate at the upper edge portion or the opposite upper edge portions at both ends, the bolt fastening plate is brought into contact with the bolt fastening plate of the adjacent base plate, and the bolt introduction hole is passed through. A PC concrete base for underground septic tanks, wherein a bolt is inserted into and tightened into the bolt fastening hole to connect adjacent foundation plates. Plate.

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