JPS58153850A - Block for tensioning and fixing ring- shaped pc steel material - 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 This invention is based on the idea that when applying the prestress of a circular concrete structure to a pressure tunnel or an inner tubular concrete where internal pressure acts, such as a pressure main. It is placed in a ring shape inside the wall and is placed on a block made of 2po steel*RT that is used to tension and check the feet.

When applying prestress in the circular direction to a concrete structure such as a grain silo in a liquid storage tank, a -WK notch recess is provided on the circumference of the structure, and a main anchor placed within this notch recess is provided. It is known prior to the filing of this application that the POIII material is tensioned and fixed using a body and a hypothetical body (see II of Japanese Patent Publication No. 50-58841).

In this conventional example, as shown in FIG. 7, one PO copper material through-hole provided in each of the main fixing body 1 and the hypothetical fixing body 2 is located at the rectangular Ilk point position, so it is assumed that the main fixing body 1 Wearing body 2
As a result, it is necessary to form these notches rMJ deeply, and since the hypothetical attachment body is divided into 2 or 2, it is necessary to make PO with a jack.
It is unstable compared to steel material.

The present invention #4 is intended to improve the conventional model, which includes the above-mentioned shortcomings.The plotter for tensioning and fixing the ring-shaped PO steel material is a combination of two elongated blocks, and one The main fixing block is provided with two pairs of main fixing holes at symmetrical positions along the longitudinal axis i11, and the other hypothetical mounting block is provided with two pairs of main fixing holes at symmetrical positions along the longitudinal axis i11. A pair of hypothetical horizontal holes and a cow notch hole are provided at the point Tt.
It is a feature.

Hereinafter, the present invention t1#- will be explained based on the drawings.

In Fig. 1, reference numeral 3 denotes a pressure tunnel (or pressure water pipe) constructed in soft rock, and within the concrete, there are many ring-shaped sheaths 4 arranged at appropriate intervals in the length direction. There are 100,000,000,000,000,000,000,000,000,000,000 steel members.

A cutout recess 5 is provided in a part of the inner surface of the block, where the block tMA of the present invention is inserted into a ring-shaped po steel material C.
The tension φ is established.

In one embodiment shown in Figs. 2 to 4, 6 is a main fixing block, and 7 is a hypothetical plotter, and these blocks are used to fix two PO steel materials of 8,90m*. It has become.

Both the main fixing block 6 and the hypothetical wearing block 7 are square W.
The main fixing block 6 is elongated in the IIr plane, and is provided with two pairs of main fixing horizontal holes 10.10' and 11.11' at symmetrical positions along its length direction -sI. The block 7 is provided with a pair of temporary attachment MAIII holes 12 and 12' and a pair of cutout holes 13 and 13' at symmetrical positions along its longitudinal axis.

The ends 8' and 9' of the PO steel materials 8 and 9 are provided with medium notch holes 13.
13' and the main fixing side hole to, io't-: I&S, the main fixing is performed by me at the back surface 15 of the main fixing block 6.

The ends 8" and V of the PO steel materials 8 and 9 are horizontal holes for main fixing,
xi' and the hypothetical wearing horizontal holes 12 and 12', and are fixed by the pipe at ll11t7 of the hypothetical wearing block 7.

In this state, install the inner block on the jack 18 between the opposing front faces 14°16, and push it apart with the block t-shirt life 18.41) PG steel material 8°9 tjl! ! i
At the stage when a predetermined tensile stress is generated in the PO steel material 8.9, the glI parts 8", 9"
At @, p books will be established.

Then, we removed the tentatively attached I @ draft hole 12.12', and 1
1 After removing the hypothetical wearing block raIk, place the remaining part of the main fixing level block 6 into the notch recess 1 using mortar Yt.

For example, three l4ips are inserted into each horizontal hole, and sawtooth-like irregularities are provided on the inner surface thereof.

In addition, insert the side into the main fixing side holes 11 and 11' and PO
The final fixing work on the ends lIg' and 9' of the steel material 8.9 will be done in a comfortable space with the jack 11 installed, so in order to make this work 5 vs J& ( 6. It may be possible to temporarily attach a push plate 19 as shown in FIGS. 6 and 6 to the main fixing block 6 1114.

This push board 191! , main fixing horizontal hole L l , l l
IIK corresponds to 1110 which is the same as this? L20.
20', its positive 1121 hole 20.20' digit 1
A cylinder 22.22' is fixed to the cylinder 22.11.
The hook 11iK at 22' is hole 23.23' is the shoulder of Cao 2,
3C, KFi hole 23.28' inside cylinder 22.22'
A layer plate 26.26' having a hole 25.25'1r with the same diameter as that of 27°27' or 1! has been done.

Is the actual fixation jiiml prior to the installation of Jyatsuki 18? t,
Loosely insert IIt into hole 20.20 at 11°11'.
'Insert 1 and press ll19t-install. After doing this, install it on the jack 18 and tension the PO steel material 8.9, and the wedge will become the coil dnezy,zy'? a-ML.

Move towards 24, 24' and allow the extension of PO steel 8.9. Then, when the jack 180 is stopped, the wedge is pushed by the coils 27 and 27' and the horizontal hole 11 for main fixing is pressed.
．． 11" and PO steel 11.91E) is anchored or removed.

As is clear from the above explanation, in the plotter of this invention, the I'O in the main fixing block and the hypothetical wear block is
Since it is placed directly above the through-hole of the steel material, the height of the block O can be low, and the notch in which it is installed can also be shallow, so the Wltm cost of the structure can be reduced. It's over. Also, since the hypothetical wearing block or two is not @p,
It has good stability when the jack is in operation, and can be used safely during work. Il! In addition, with the block t#4 of the present invention, since there is no ROM material O arrangement K1111m, not only is the workability good, but it is also possible to use large diameter PO steel materials.

In addition, Book 1III! Block A is not only suitable for civil engineering structures such as pressure tunnels, but also for general concrete hollow structures.

[Brief explanation of the drawing]

Figure 11f1 is a detailed explanatory diagram of the present invention, and Figure 11 is a perspective view showing one example of the use of the present invention. J is the original fixing block in the original version - O main, back 11
Figure 411 is also the hypothetical wearing block O front and rear view,
The irises 5IlI are the front and back sides of the press, FIG. 6 is a cross-sectional view, and FIG. 7 is a perspective view of the conventional example of layer O. In addition, in the figure, 2: Temporary attachment body, 3: Pressure tunnel, 4: Sheath, 5: Notch recess, 6: Actual fixation block, 7: Temporary attachment block, etc. Hiroji Sometani Figure 1 Figure 2 Figure 7

Claims (1)

[Claims] It consists of a combination of two elongated blocks, and one main fixing block has a left-right symmetrical position along the length direction -1 @L
Two pairs of actual fixing holes are provided, and the other hypothetical attachment block has a pair of hypothetical attachment wedge holes and a cow notch hole at symmetrical positions along the length direction -1. A ring-shaped PO steel tensioning and fixing block.