JPS605907A - Installation work of penstock by jack-up process - Google Patents

Abstract

PURPOSE:To raise the efficiency of operations by sufficienctly securing space for connecting operations by a method in which a jack-up device is set in an operating room provided on the lower end of a skew shaft, and single pipes are orderly pushed up while being conncted in the operating room. CONSTITUTION:An operating room 10 leading to a lower drift 11 is formed on the lower end of a skew shaft 1, and a jack-up device is set in the opeating room 10. A top pipe 14 tapered toward its upper end is carried in till the front of the operating room through a carrying-in truck 12 and coupled with a pushing up frame 21 on jacks 37 and 38 by a chain block. An oilpressure cylinder 30 is contracted, the top pipe 14 is lifted up, the first single pipe 41 is put into the lower part of the pipe 14, and the contact portions of them are welded. Afterwards, the pushing-up frame 21 is coupled with the projection 26 of the first single pipe 41 and moved toward the direction of B, and the pipe 14 is inserted into the skew shaft 1. These processes are repeated to install steel pipes in the skew shaft 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for installing a penstock by jacking up.

Conventionally, as shown in Figure 1, a method of installing a relatively small-diameter penstock in a long shaft is to excavate a shaft (1) with a considerably larger inner diameter than the pipe to be installed, and then insert the rail (2) into the shaft. ), installed in the horizontal part of the tunnel connected to the upper part of the inclined shaft (1), and installed from the girder entrance (3). (43
) is carried in and placed on the carry-in trolley (5), and then the single pipe (43) is carried along with the carry-in trolley (5) to the installation position using the carry-in winch (6) installed in the horizontal part of the upper mine, and then placed on the carry-in trolley ( 5) was pulled up and connected to the already installed pipe (42) by hand welding. Since such work was repeated, the work location for joining the single pipes (+1.42e 4a...) changed as the installation work progressed. In addition, unless the distance between the iron pipe (4) to be installed and the inner surface of the inclined shaft (1) is increased to a certain extent, it will not be possible to join the pipes inside the inclined shaft (1), and the inner diameter of the inclined shaft (1) will be large, resulting in penalties. The drawback was that it was expensive. Furthermore, if the inner diameter of the iron pipe (4) to be installed is smaller than a certain level, it may be difficult to work inside the pipe, or if the inclined shaft (1) is long, it may be inconvenient for the worker to get to the work place, or the work place may be difficult to work in. Since the process changes as the process progresses, it is not always possible to secure a constant footing, and there are problems with workability.There are many drawbacks, and improvements have been desired.

Therefore, the present invention provides a method for installing hydraulic iron pipes by jacking up that eliminates such drawbacks, and its characteristics are that a working chamber is formed at the lower end of the inclined shaft, and jacking equipment is disposed within the working chamber. , carry the top pipe into the working chamber from the lower tunnel, push the top pipe up using jack-up equipment, carry the first single pipe into the working chamber from the lower tunnel, and join its upper end to the lower end of the leading pipe, and then The jack-up equipment pushes up the first single pipe, then the second pipe is carried into the work chamber and its upper end is joined to the lower end of the first pipe, and then the jack-up equipment pushes up the second single pipe. In the same manner, the third and subsequent single pipes are sequentially carried into the work chamber, and the single pipes are joined together and pushed up by jack-up equipment to install a penstock inside the inclined shaft, and between the penstock and the inner surface of the inclined shaft. The purpose is to fill the filler with the filler.

According to this construction method, the pipes are always joined in the same work room at the bottom end of the inclined shaft, so even if an automatic welding machine is installed in this work room, it is extremely easy to handle and it is expected that welding quality will improve. . In addition, sufficient work space is secured and the footing is stable, preventing workers from falling, improving safety. Since it is sufficient to make the inner diameter of the inclined shaft slightly larger than the outer diameter of the iron pipe to be installed, the cost of excavating the inclined shaft can be reduced. Furthermore, it is convenient for workers to go to the work room, it is convenient to carry equipment and auxiliary materials into the work room, and the work room can be easily ventilated because the work area is in one room, which is favorable for environmental hygiene. There are effects such as

That is, when iron pipes are installed using the construction method of the present invention, welding quality, safety, workability, work environment, and economic efficiency are improved compared to conventional methods.

An embodiment of the present invention will be described below with reference to FIG. 2 and subsequent figures. 00! A working chamber 0η formed at the lower end of the diagonal shaft (1) is a lower tunnel that communicates with the working chamber α, and rails θ→ for the loading cart are laid on the bottom surface. a→
is a leading pipe formed in a tapered shape with a tapered upper end, σ
G is a guide roller rotatably disposed on a bracket on the inner peripheral surface of a ring QIS fixed to support rods disposed at appropriate intervals in the inclined shaft (1). It guides the tubes (4□, 4□e43-.). 0'/) is a protective wall installed at the top of the working room OQ, with the leading pipe σ→ and the single pipe (41142*
43...) through holes are formed. 0I is arranged in the fourth row of work room 0Q, and both ends are protected by protective walls αη.
and the inclined end surface (10A) of the working chamber α0, and two pole rods (10A) parallel to each other.
9A) and the connecting plate (19A) that connects the rod rod (19A).
19B). Also, each rod rod (19
A) has pin holes (
A) is formed. Q is an arrow (5) inside the work room αQ.
(2) It is a push-up frame arranged to be movable in a direction, and its four joints are provided with protrusions (21A) that fit into the rod rods (19A) of each support column a9. (A) shows the leading pipe Q4 and the single pipe (41e 42*
43...), and in this embodiment, notches are formed every 90'.

(C) is a U-shaped frame fixed to the outer peripheral surface of the ring (C) facing each notch (C), and (C) is an arrow (C) (H) inside the U-shaped frame (C). ) is a presser block that is disposed so as to be movable in the direction of
Grooves (b) are formed in the lower part of the outer circumferential surface of the parts (3...) to fit into the protrusions (c) fixed every 90'. 2) is a threaded rod with a handle (A) that is screwed into the screw hole formed in the center of each U-shaped frame (C) and whose tip is rotatably connected to each presser block (C). This is a hydraulic cylinder installed in the rod rod (19A) of the support θ, and each protrusion (30 is the push frame 0) of the piece (30 is the push frame 0) fixed to the lower surface of the main body.
21A) is connected by a pin to the bracket (32).

(83) (8■ is the rod of each pillar (1 town) (19A)
The upper pin (33) is fitted with the through hole (8) at the tip of the piston rod of the hydraulic cylinder, and the lower pin (34) is fitted with the through hole (8) of the piston rod end of the hydraulic cylinder. The through hole (36) of the protrusion (21A) is fitted onto the outside.

■The force is determined by the height adjustment jack installed on the inclined end surface (10A) of the working chamber α [phase], and (A) is the inclined side surface (10A) of the working chamber α [phase].
It is an alignment jack installed in IOB). Note that an automatic welding device (not shown) is installed in the work room (10).

The installation procedure of the iron pipe (4) will be explained based on the above configuration.

First, the carrying platform wheel carrying the leading pipe α→ is brought through the lower tunnel 00 to the front of the working room 04, and then the leading pipe α→ is lifted up with a chain block (41) as shown in Fig. As shown, jack the leading pipe α→ (pass the third support). Next, remove the lower pin (goods), extend the piston rod of the hydraulic cylinder (to), and move the push-up frame ◇ in the direction of the arrow. Next, fix the lower pin (3 pins into the pin hole) and the through hole (inserted into the push-up frame) to the column 00, then remove the upper pin (33) and attach the piston of the hydraulic cylinder (to). Reduce the rod and then the upper pin (33)
Insert into the pin hole (E) and through hole (2) to connect the piston rod to the support column 0. By repeating this movement, the push-up frame Qυ is shaped like an inchworm and shaped like an arrow (
4) so that the push-up frame Q1) faces the protrusion (E) as shown in FIG. Next, turn the handle to move the presser block) to each presser block in the direction of the arrow (b), and
4) and fit the groove (2) into the protrusion (E). Next, move the push-up frame (b) in the direction of the arrow by reversing the above action.
move in the direction. Next, in the same manner as above, put the first single pipe (41) into the working chamber aO from the lower tunnel 0]) and deliver it to the jack (8'o (2)).Next, as shown in Fig. 18, Activate Shinjatsuki (88) and get 1st unit %1
(4) concentrically with the leading pipe α→, lift the first single pipe (41) using the three height adjustment jacks and bring its upper end into contact with the lower end of the leading pipe α→.Next, the automatic A welding device welds the contact portion between the leading pipe (L→) and the first single pipe (41).

Next, rotate the handle in the opposite direction to separate each block (c) from the leading pipe α→. Next, press the push-up frame 121> with the arrow)
direction and move each block (2) to the first tube (4,)
At the same time, the groove (A) is fitted into the protrusion (E). Next, move the push-up frame ←η in the direction of the arrow (b) and
Insert the leading pipe → into the inclined shaft (1) as shown in the figure.

Next, the second single pipe (42) is welded to the first single pipe (41) in the same manner as above, and the first single pipe and the first single pipe are welded together. Push up the second single tube (4X4□). By repeating the above operations, the iron pipe (4) is placed in the inclined shaft (1), and then the iron pipe (4) is placed inside the inclined shaft (1).
) The space (c) between the lower end of the pipe (4) and the iron pipe (4) is partitioned by a partition plate (to), and the installation work is completed by filling the space (a) with concrete or mortar.

As described above, according to the present invention, pipes are always joined in the same working room at the lower end of the inclined shaft, so even if an automatic welding machine is installed in this working room, it is extremely easy to handle, and welding quality is improved. can be expected.

In addition, sufficient work space is secured and the footing is stable, preventing workers from falling, improving safety. Since it is sufficient to make the inner diameter of the inclined shaft slightly larger than the outer diameter of the iron pipe to be installed, the cost of excavating the inclined shaft can be reduced. Furthermore, it is convenient for workers to go to the work room, it is convenient to carry equipment and auxiliary materials into the work room, and ventilation in the work room is easy because the work area is fixed, which is good for environmental hygiene. There is an effect. That is, when iron pipes are installed using the construction method of the present invention, welding quality, safety, workability, work environment, and economic efficiency are improved compared to conventional methods.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a conventional example, FIG. 2 and the following figures show an embodiment of the present invention.
Figure 8 is a longitudinal sectional view of the working room, Figure 4 is a longitudinal sectional view of the main parts,
Figure 5 is a view from the V-■ arrow in Figure 8, and Figure 6 is a view from ■- in Figure 8.
7 is a view in the direction of the ■-■ arrow in FIG. FIG. 14 is a longitudinal sectional view showing the iron pipe installation procedure. (1)...Slanted shaft, (4)...Iron pipe, (40,42*
43...)...Single pipe, θ0...Working chamber, αyu...
...Top pipe, 00... Support, G0... Push-up frame (jacket up equipment), (C)... Presser block, (7)
...Hydraulic cylinder, (Foundation) (Foundation)...-Pin, (8)
・・・Height adjustment jack, (No. 3...Alignment jack agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. Form a working chamber at the lower end of the inclined shaft, install jacking equipment in the working chamber, carry the leading pipe into the working chamber from the lower tunnel, push the leading pipe up with the jacking equipment, and lift it from the lower shaft into the working room. The first single pipe is carried into the work chamber, and its upper end is joined to the lower end of the leading pipe. Next, the first single pipe is pushed up using jack-up equipment. Next, the second single pipe is carried into the work chamber, and its upper end is joined to the lower end of the leading pipe. The lower end of the first single pipe is joined, and then the second single pipe is pushed up using the jack-up equipment, and in the same way, each of the eighth and subsequent single pipes is sequentially carried into the work chamber, and the single pipes are joined together and pushed up using the jack-up equipment. A penstock installation method using jack-up, which is characterized in that a penstock is raised and placed in the inclined shaft, and filler is filled between the penstock and the inner surface of the inclined shaft.