JPS61165425A - Construction of manhole - Google Patents

Abstract

PURPOSE:To simply and exactly position and stack up blocks by a method in which blocks are butted, the heads of couplers are projected through holes into a box, and the blocks are connected with each other by using washers with notches. CONSTITUTION:The joint faces 5a and 4b of a slant wall block 5 and a straight wall block 4 are butted with each other for setting. The heads 18b of bolts 18 are projected through holes 19 into a corresponding box 19 by utilizing the guidance of tapered portions 18a. A washer 22 is driven into the aperture 20 between the head 18b and the bolt 18 and the end wall 19a of the box 19 to strongly join the adjacent blocks. The blocks can thus be smoothly stacked up and the manhole can be constructed with good efficiency.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for constructing a prefabricated manhole constructed by stacking a plurality of concrete blocks such as frame blocks, straight wall blocks, and inclined wall blocks. It is something to do.

[Prior art] This camphor manhole is constructed by, for example, placing a chestnut stone foundation or the like at the bottom of ground that has been excavated by m, laying a bottom slab block on this foundation, and placing wood blocks, straight walls, etc. on the bottom slab block. It is generally constructed by stacking a plurality of concrete blocks such as blocks and sloping wall blocks in an f order, and then the blocks are used by backfilling with soil around them.

However, recent backfilling work is carried out using heavy equipment such as bulldozers, so uneven earth pressure tends to act on the stacked blocks during one work. If you don't do that, there will be a problem if there is a gap between each block in the 7KL text.

To solve this problem, we wrapped a strip around the outer periphery of the joint of the block adjacent to the old one.

Alternatively, it has been considered that a connecting plate is attached to the outer periphery of the blocks from the first block to the second block to directly connect each block to prevent displacement between the blocks. However, when joining the upper and upper blocks using this method, positional deviations tend to occur between the two blocks when they are stacked, so that the block phase 77'0') The 6C invention attempts to solve the problem of joining both blocks while leaving a misalignment, or making it difficult to attach the connecting plate, etc., and requiring time and effort to correct the position of the blocks. Problem] As mentioned above, the great invention is the problem that occurs when the blocks are misaligned when they are stacked together.
In other words, we want to solve the problem that the circumferential positional misalignment between blocks remains in the completed manball, or that it becomes necessary to correct the positional misalignment of the blocks before tightening the joint, which negatively affects the efficiency of MII dyeing work. That is.

In other words, the present invention aims to provide a construction method that allows blocks to be stacked while positioning them easily and reliably, and allows for efficient construction of a manhole.

[Means for Solving the Problems] In order to achieve the above-mentioned objects, the present invention provides a method for constructing a manhole by stacking a plurality of concrete blocks such as body blocks, Makabe blocks, and inclined wall blocks. At one joint of the blocks, which are to be adjacent above and below with their joint surfaces abutted against each other, a shaft part and a head having a diameter larger than the shaft part and having a tapered guiding taper part at least on the distal end side thereof are attached. A lL fitting consisting of # is erected with a gap left between the head and the joint surface so that it cannot be pulled out, and on the other hand, an end wall with a hole is attached to the joint surface. An exposed box is provided with an opening on the circumferential surface of the plow door, and the Oka blocks are butted against each other, and the head of the fastener is passed through the hole using the guiding action of the tapered part to pass through the box. 11 - A washer having a notch through which the shaft of the undergarment can be inserted between the head of the undergarment and the end wall of the box is connected to the axis of the undergarment and [ The characteristic # is that the two blocks are attached from the direction in which they intersect, thereby connecting the two blocks.

Fake...] According to this kind of f-pupil, when stacking blocks,
The 11-piece erected on one joint surface of the block plays the role of a positioning pin, thereby preventing the block from shifting from rain. Moreover, a tapered part is provided at the tip of the head of the first jacket, and the head is inserted into the box through the hole by utilizing the guiding action of this tapered part. When stacking and unloading blocks, problems such as time-consuming engagement between the fastener and the poncus do not occur.

[i! Embodiment] Hereinafter, an uninvented embodiment will be described with reference to FIGS. 1 to 5.

The manhole 1 shown in FIG. 1 includes a plurality of concrete blocks, that is, bottom blocks 2.

A frame block 3, a straight wall block 4, and an inclined wall block 5
#lI is built by stacking these sequentially.

To be more specific, the bottom block 2 is placed on the chestnut stone foundation 6,
It is a disc-shaped piece laid through a layer of mortar 7, and has an annular joint surface 2a on the outer periphery of its upper surface, and a positioning protrusion 2b on the outer periphery of the joint surface 2a. It is protruded in a ring shape.

Further, the body block 3 has a lower end portion connected to the bottom plate.
゛It is a cylindrical body that is fitted inside the protrusion 2b of the blow 7 girder 2, and the joint surface 3a on the lower end side is joined to the joint surface 2a of the bottom plate block 2. v8 that makes up the system is connected. An invert 11 having an inverted arch shape y49 continuous to the tube 8 is installed at the bottom of the star block 3. Further, the straight wall block 4 is connected to the cylinder mounted on the body block 3 I-Z by abutting the joint surface 4a on the lower end side against the joint surface 3b on the north end side of the body block 3. It is a physical thing. Further, the slanted wall block 5 has a joint surface 5a on the lower end side thereof connected to a joint surface 5a on the upper end side of the straight wall block 4.
It is placed on the aIst block 4 so as to be butted against the aIst block 4, and is formed into a substantially truncated conical cylindrical body with an eccentric upper end. On the joint surface 5b on the upper end side of this slanted wall block 5, there is a receptacle #1 for holding the lid body 12 so as to be able to open and close it.
3 are placed through a concrete adjustment ring 14 and a plurality of adjustment rubbers 15, and are fixed using receiving frame bolts 1B.

In this way, when constructing a manhole by stacking a plurality of blocks 2.34.5, the following construction method is adopted. That is, one of the blocks 45 which should be adjacent to each other above and below with their joining surfaces abutting each other, for example, one of the blocks 45 which is a straight wall block 4, is provided with cap nuts 17 opening at the joining surface 4b at equiangular intervals in the circumferential direction. In addition to burying the
Each of these bags) 1 in 17! - The bolt 18, which is a fitting, is screwed in such a way that it cannot be removed, leaving a gap 20 (Fig. 2). The bolt 18 has a tapered threaded part 18a at its tip.
and a cylindrical head 18c having a hexagonal column wrench hook 18b in the middle part, and a shaft part 18d having a smaller diameter than the head 18c and having a thread carved on its outer periphery. In addition, iron boxes 1 are installed at three locations corresponding to the respective cap nuts 17 of the other block, that is, the inclined wall block 5.
The box 19 in which the box 9 is buried is a box-shaped box that opens into the inner circumferential surface of the inclined wall block 5, and the outer surface of the end 919a thereof is exposed on the joint surface 5a of the block 5. The end wall 19a has a head 18 of the pole 18.
b has an oval-shaped hole 19b that can be penetrated (the second
Note that an anchor 21 for firmly embedding the box 19 in the straight wall block 4 is fixed to the outer surface of the other end wall 19c of the box 19 by welding or the like. Then, when mounting the inclined wall blower 5 on the straight wall block 4 with the joining surfaces 5a and 4b abutted against each other, the head 18b of each pole 18 is inserted into the tapered portion 18.
Using the guiding action of a, they are respectively projected into the corresponding boxes 19 through the holes 19b (FIG. 3).

Thereafter, a washer 22 is driven into the gap 20 existing between the head 18b of each bolt 18 and the inner surface of the end wall 19a of the box 19. (Fig. 4), the washer 22 has a circular cross-section with a circular outer periphery;
It has a long hole-shaped notch 22a that opens in the direction of L. That is, this washer 22 has a tapered shape in which the opening end side of the notch 22a is thinner. Therefore, the opening width W of this notch 22a is as follows.

The diameter of the shaft portion 18d of the pole 1-18 is set to the diameter of the head portion 18c, and the shaft portion 18d can be inserted into the notch portion 22a. therefore,
The washer 22 is inserted into the head 18c of the bolt 18 by driving the washer 22 in a direction perpendicular to the axis of the bolt 18 with the notch 22a corresponding to the gap 20 portion marked i of the shaft 18d. and the end 1 of the box 19 [
19a, the straight wall block 4 and the inclined wall block 5 can be firmly joined. In addition, in this embodiment, the same construction method as described above is also used when stacking the straight wall block 4 and the frame block 3, and when stacking the body block 3 and the substitute block 2. The reference numeral 23 indicates mortar filled in each bow and lath 19 after the fixation. Further, 24 is a seal groove provided in an annular shape on the joint surfaces 2a, 3b, and 4b facing the direction;
Downward joint surfaces 3a, 4a.

This is a protrusion provided in an annular shape on 5a. This protrusion 25 is adapted to fit into the seal groove 24 when the blocks 2.3.4.5 are joined together.

Only the portion where the cap nut 17 and the box 19 are provided are the seal groove 24 and the protrusion 25.
is omitted. Further, 26 is a foothold for one inspection.

However, according to the construction method described above, block? , 3.4.5, the bolt 18 screwed into the nut 17 engages with the hole 19b of the corresponding block nut 19 and serves as a positioning pin Mt-, so that blocks 2 and 3, Misalignment between 3 and 4 and between 4 and 5 is reliably prevented. Moreover, a tapered part is provided at the tip of the bolt 18, and the bolt 18 is inserted into the hole 19b of the box 19 by utilizing the guiding action of this tapered part 18a. The bolt 18 and the box 19 can be easily engaged with each other when the block is stacked.

Then, by simply driving the washer 22 into the gap 20 and attaching it, the adjacent blocks can be firmly joined together.

Therefore, after stacking the blocks, there is no need to correct the misalignment of the blocks, attach strips and connecting plates to the appropriate places, and attach bolts to designated nuts. , it is possible to construct manholes efficiently and reliably. In addition, the operation of rotating and tightening the bolts for direct connection is completely unnecessary, and from this point as well, the effect of connecting each block can be achieved quickly and easily. In the manhole l constructed in this way, the blocks 2, 3.3, 4.4, and 5 are firmly connected by bolts 18, so that unevenness that occurs during backfilling work can be avoided. Block 2 due to earth pressure
, 3, 4, and 5 will of course be eliminated.

Note that the present invention is not limited to one or more embodiments, and the following modifications can be considered.

First, the first attachment provided on the block on the - side is not limited to bolts; for example, as shown in Figs. However, the pin 27 is fixed by embedding the proximal end of the shaft portion 27a in the block 4. Moreover, the pin 28 is.

A hole 29 is drilled in the block 4, and this hole 29
By inserting the shaft portion 28a into the hole and fixing it with an adhesive such as epoxy resin 30, the shaft portion 28a is erected so that it can be pulled out. And the heads 27b, 2 of these pins 27, 28
Tapered portions 27c and 28c for guiding are also provided at the tip of 8b.

In addition, when using a bolt as a 11-attachment, a flat washer 122 may be used as shown in FIGS. 8 to 11 instead of a cut-shaped washer. After the joint surfaces 4b and 5a are brought into contact with each other, a hole 17 is provided in one of the blocks 4 and 5 which are to be adjacent above and below to the joint surface 4b, and a tightening bolt 18 is tightened to the nut 17. A box 19 with an end @ 19a with a hole 19b exposed on the joint surface 5a is opened on the inner circumferential surface of the block 5, and The above-mentioned Pol)
1g of head 18c projects into the box 19 through the hole 19b, and a notch through which the shaft 18d of the bolt 18 can be inserted between the head 18c of the bolt 18 and the end wall 19a of the box 19. A flat washer 122 having a diameter of 4122a is inserted from a direction perpendicular to the axis of the pole 18, and then the bolt 18 is tightened to connect both blocks 4.5.

Of course, the shape of the head of the I-mount including the tapered portion is not limited to that of the above embodiment.

For example, it may be as shown in FIGS. 12 and 13, that is, the head 1 of the fastening tool 118 shown in FIG.
18c has a tapered portion 1taa in its entirety.

In addition, the head 218C of 1E arrival JL218 shown in Fig. 13
The large diameter portion 218e that locks the washer and the large diameter portion 21
It consists of a taper m218a having a smaller diameter than 8e.

Also.

The shape of the tapered portion itself is not necessarily limited to a conical shape; for example, the shape of the tapered portion 31 shown in FIG.
8a, or may have a truncated conical shape without a sharp point like the tapered portion 418a shown in FIG.

Furthermore, in the above embodiment, a case was explained in which the lower block of the upper and lower adjacent blocks was provided with a 1-hi attachment device, and the upper block was provided with a box, but conversely, a box was provided in the lower block. In addition to establishing
The present invention also includes a device in which a fastening device is provided.

Further, the number of locations connected by one tool and box is not limited to three, but may be two or four (1!) or more.

Furthermore, the potokusu is not limited to iron, and the method of fixing it to the block is not limited to burying an anchor. and,
The hole formed in the end wall is not limited to an oval shape and may be circular, but if it is oval, it will be easier to secure it with a bolt or other fitting.

Further, the shape of the washer is not limited to the above-mentioned shape, and can be modified to have a rectangular outer shape, for example.

[Effects of the Invention] As described above, according to the present invention, when stacking blocks, the fitting 11 protruding from one block engages with the hole of the corresponding box and functions as a positioning pin. Therefore, problems caused by the misalignment of the blocks that occur at the last floor when the blocks are HL-stripped, such as circumferential misalignment between the blocks remaining in a cracked manhole. , it is possible to reliably solve the problem that it is necessary to correct the misalignment of blocks before tightening the joint, which has a negative effect on the efficiency of construction work, and the problem that it takes time and effort to connect each block. can. Moreover, since the head of the first hitch is provided with a tapered portion for guiding, the first hitch fitting can be easily inserted into the hole of the block. Therefore, the work of stacking blocks can be carried out smoothly, and the manhole can be constructed efficiently.

[Brief explanation of the drawing]

1 IN to 5 show one embodiment of the present invention, FIG. 1 is a sectional view, FIGS. 2 to 4 are process explanatory diagrams of block joining and tightening work, and FIG. 5 is an exploded view showing the main parts. FIG. 6 and 7II4 are partial sectional views showing other embodiments of the +h-11 tool according to the present invention. Figure 8~
FIG. 9 is a process explanatory diagram showing still another embodiment of the present invention. FIGS. 12 to 15 are schematic explanatory diagrams showing other embodiments of the tapered portion according to the present invention. 1 @ II @ Manhole 2...-a version Pro-nk 2 a
@Saiken joint surface 3...〈Tai Pro, Ri 3 a, 3
b @* *Joint surface 411・-r9 wall block 4a, 4b・・urn joint surface 5・jA ji block 5a・3・joint surface 5 fist s
*Kuristone foundation 7...Mortar layer 8 ・Meeting 9 ・ ・ ・
h-Ken 111・Invert 12・-・Lid body 13・・Receiver frame 14・KaΦ so-called adjustment ring 15・IR adjustment rubber 16・Bite・・Receiver frame bolt 17・・
- Nut (bag nut) 18 and m - Fastening tool (bolt) 18a1 Red taper part 18b Lu... Wrench hook 18c... Head 18d - Fist shaft part 19 - Box l 9 a* * *End wall 19b-@, hole
19C-, one end wall 20--gap 21... anchor 22--, washer 22a...-notch 23...
-Mortar 24...Seal Saki 25...Protrusion
26... Footrest 27.28... L tool (pin) 27a, 28a...Φ shaft part 27b, 28b, φ, head 27c, 28c fist e, taper part 29... Hole 30 tatami・・Epoxy resin 31・・
Lock washer 118...Fixing tool 118a, Φ, tapered part 118c...head 122, washer 122a...notch 218...+): fi tool 218a...tapered part 218e...O Large diameter part 318a, life, taper part 418a1, tapered part

Claims (1)

[Claims] When constructing a manhole by stacking multiple concrete blocks such as wall blocks, straight wall blocks, and slanted wall blocks, the joint surfaces of the blocks should be butted against each other, and a shaft should be attached to the joint surface of one of the blocks that should be adjacent to each other above and below. and a head having a diameter larger than that of the shaft and having a tapered guide taper at least on the distal end side, leaving a gap between the head and the joint surface. At the same time, a box with an end wall with a hole exposed on the joint surface is opened on the peripheral surface of the block, and the two blocks are butted together. the head of the fastening tool protrudes into the box through the hole while utilizing the guiding action of the tapered part, and the fastening tool is inserted between the head of the fastening tool and the end wall of the box. A washer having a notch through which the shaft can be inserted is attached from a direction perpendicular to the axis of the fastener,
A method for constructing a manhole, characterized in that the two blocks are thereby connected to each other.