JPS6047139A - Block for up-and-down combination type culvert - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (a) Field of commercial use The present invention is applicable to underground sewers, headrace channels, irrigation channels, underground roads,
This invention relates to an upper and lower combination type underdrain block used when forming a common ditch, etc.

(b) The prior art upper and lower combination type culvert block has a U-shaped lower half member with lower side plates connected to both sides of the bottom plate, and an upper part that abuts the master side plates on both sides of the top plate. It is equipped with a U-shaped one-half member formed by connecting side plates, and these lower half members and -L
The half members are connected using prestressed steel.

That is, the PC steel plate inserted into the lower side plate from the lower part m1 of the lower part 1', and the part inserted from the upper surface part of the upper half member
The PC steel material inserted into the L part side plate is connected by a coupler (long nut for connecting steel materials) at the joint between the lower side plate and the second part side plate, and these PC steel members are tensioned. I try to give prestress. However, if the moment I and shearing force of the lower connecting portion are calculated using this prestress, such a long PC steel material is unnecessary and uneconomical.

It has also been considered that a prestressed steel material is buried in the side plate of the toe section in advance, and that this PC steel material and the prestressed steel material inserted into the upper side plate are connected by a coupler. 2. If the axes of the lower PCwI material are not completely aligned, it will not be possible to connect them with a coupler, which will take time and effort during construction. There is.

(c) Purpose The present invention was made with attention to such circumstances,
It is possible to reliably and firmly connect the lower 116 member and the -half member without using an unnecessarily long prestressed steel material,
Moreover, it is an object of the present invention to provide a one-row combination type underdrain block that does not cause the inconvenience of requiring time and effort for alignment.

(D) Structure In order to achieve the above object, the present invention provides a connecting means for connecting the lower half member and the upper half member with recesses formed at intermediate positions of the lower side plate and the partial side plate, respectively. , a wire insertion hole bored inside the lower side plate and the second side plate to communicate the both recesses, and a wire with both ends positioned in the both recesses and inserted into the wire insertion hole, e.g. A PC steel material, a nut screwed onto the insertion end of the wire material, e.g., the PC@ material, into each of the recessed parts, and a nut provided on the upper side plate, and when the nut is tightened, the wire material, e.g., PCIA kA
and a passage for inserting a pull rod to apply tension to the pull rod.

(e) Examples Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

As shown in FIG.

As shown in FIGS. 2 and 3, the underdrain block 1 includes a lower half member 3 and a block assembled on the lower half member 3.
- It is equipped with the half member 4 and the connecting means 5 for connecting these M m members 3.4. The lower half member 3 has a length of 1. ．． It is approximately U-shaped and is formed by consecutively arranging different lower side plates 7.8 of 1 unit. Also,
The upper half member 4 is approximately U-shaped, with J-part side plates 11.12 having different lengths in the downward direction (1-13.14) arranged on the left and right edges of the top plate 9; Department side version 11.12
is placed on the lower side plate 3 so as to butt against the lower side plate 7.8. Note that the sum of the lengths of the left lower side plate 7 and the upper side plate 11 (1, +15) is the sum of the lengths of the right lower side plate 8 and the L side plate 12 (12+1.). They are set to the same value, and the top plate 9 is held parallel to the bottom plate 6. Further, the connecting means 5 includes the lower side plate 7.8.
and a concave portion 13.14 formed at an intermediate position of the upper side plate 11.12, and both concave portions 13.1 bored inside the lower side plate 7.8 and the upper side plate 11.12.
4, a wire rod such as a PC steel material 16 inserted into the wire rod insertion hole 15 with both ends positioned in the double concave portions 13.14, and each of the concave portions of the PC steel material 16. 13. Nuts 19.20 screwed onto the insertion ends 16a and 16a, respectively, and the side plates 11 on the above.
．． 12, and the PC is installed at the time of the Nara I.20 inspection.
A passage 23 is provided for the purpose of inserting a pull rod 2z for applying tension to the steel material 16. Specifically, each of the recessed portions 13.14 corresponds to each of the lower side plates 7.
8 and the inner surface of each of the side plates 11 and 12 is recessed. In addition, screws are carved into the insertion ends 16a and 16b of the PC copper PC steel material 16 described in +ii+.
An anchor plate 24 is interposed between the recessed portion 13.14 and the recessed portion 13.14. Further, on the outer periphery of the pull lock F' 22 at the joint between the lower side plate 7.8 and the upper side plate 11.12, the side plates 7, 8.11.12
A steel pipe 25 is installed to prevent sideways slippage.

When installing the PC steel material 16, first insert a nut 1 into the lower insertion end 16a of the PCfi material 16.
9 and screw it onto the upper insertion end 16b (
'Temporarily fasten 20. Thereafter, the inner end of the pull rod 22 inserted into the passage 23 is connected to the insertion end 16 of the PC steel material 16 via the coupler 26. b, and the outer end of the pull rod 22 is connected to the hydraulic jack 2.
7 to give tension to the PC steel material 16. Then, the nut 20 is fully tightened, and then the coupler 1iij is removed from the PC#l material 6 and the pull rod 22 nQ, and the pull rod 22 is removed from the passage 23. Since a plurality of the PC steel materials 16 are provided at predetermined intervals, each of the PC steel materials 16 is stretched by performing the above operations in sequence. In addition, a plurality of horizontal tightening PC steel members 28 and 29 are stretched over the bottom plate 6 and the fourth plate 9. A plurality of underdrain blocks 1 thus constructed are connected to the alternating current V with the front and back reversed, and these are tightened and fixed by vertically tightening PC steel members 31. The tensioning mode of this vertically tightened PC #l material 31 is similar to that of the PC steel material j6, and 32 and 33 are recessed portions. If it is a culvert pro-nk 1 with such a configuration, the lower side version is 7.8
The lower half member 3 and the upper half member 4 can be firmly connected by a short PC steel material 16 stretched between the recessed part 13 provided in the upper side plate 11.12 and the recessed part 14 provided in the upper side plate 11.12. This reduces the amount of steel compared to the conventional method in which the PC steel material inserted from the lower end of the lower half member and the PC steel material inserted from the L end of the upper half member are connected with a campler and both parts are fixed with wheat cotton. It has the advantage of being able to be significantly reduced, making it extremely economical. Also.

If this is the case, there is no need to align the PCM material 16 with a fixed steel material or the like when the PCM material 16 is stretched, thereby facilitating the assembly work.

Furthermore, in this embodiment, the lower side plate 7.8 and the upper side plate 1
1.12 Since the steel pipe 25 is interposed at each joint, it is possible to effectively prevent the lower half member 3 and the upper half member 4 from shifting laterally. Also, since the lengths of the left and right dome side plates 7.8 and the lengths of the left and right upper side plates 11.12 are different, the main culvert block l can be swapped front and back as described above. As long as they are connected alternately, the lower side plates 7
．． 8, the upper side plate 11, and the workpiece 2 have different levels at the front and back, and this level can prevent vertical displacement between the lower side plate 7.8 and the upper side plate 11.12. . Therefore, in the past, four pieces of vertically fastening PC steel were required for tightening and fixing the lower half members together, and four vertically fastening PC steels were needed for tightening and fixing the upper half members together, but the present proposal In this case, it is possible to obtain the effect that only two trees are required for each.

Note that the underdrain block according to the present invention can be similarly used when constructing an underdrain without performing vertical tightening as described above.

(F) Effect Since the present invention has the above-described configuration, one lower half member and J, 'l' can be assembled without using unnecessarily long PC steel members.
It is possible to connect the parts reliably and firmly, and
It is possible to provide an upper and lower combination type underdrain block that does not cause the inconvenience of requiring time and effort in construction due to alignment.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG.
Figure 2 is a partially cutaway side view, Figure 3 is a front view of the culvert block, Figure 4 is an enlarged view of the bottom of Figure 3, and Figure 5 is viewed from arrow B in Figure 4. Figure 6 is an enlarged view of C part in Figure 3, Figure 7 1±D arrow view in Figure 6, i
Figure 8 is an enlarged view of section E in Figure 3, and Figure 9 is a 1m diagram of the F-F line section in Figure 8. Lower half member 4... Upper half member 5... Φ connection means 6... Bottom plate 7.8... Lower side plate 9... Fist Ilt version 11.12... Upper side plate 13.14...・Concave portion 15...Wire rod insertion hole 16---Wire rod (PCWI material) 19.20---・Nand 2211φ・Pull rod 230・Passage 24---Anchor play 1・25・φ conflict mJd- 26... Force/unbura 27...Hydraulic jack 28.29...Horizontal tightening PC steel material 31...Vertical tightening PC steel material 32.33...Vertical tightening exit gate depression department agent Patent attorney Hiroshi Akazawa Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Scope of Claims] A substantially U-shaped lower half member having lower side edges connected to both side edges of the bottom plate, and two-part side plates that abut each of the lower side plates connected to both side edges of the top plate. In the underdrain block, the underdrain block includes a substantially U-shaped upper half member, and a connecting means for connecting the upper half member to the lower half member, wherein the connecting means is connected to the lower side plate and the upper side plate. a wire insertion hole that is bored inside the lower side plate and the second side plate and connects the two concave portions; A wire rod such as a prestressed steel material inserted into the insertion hole, a nut screwed onto the insertion end of the wire rod e.g. the prestressed steel material into each of the recessed portions, and a tightening member provided on the two-part side plate of the nut i. Q. Please check the tension in the wire rod, for example, P CwI material. It is characterized by being equipped with a passageway for inserting a pull rod to carry out the operation.