JP2785631B2 - Connection box for submerged box connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting box used for final joining of a buried box when a buried box is laid and joined on the sea floor or the like to form a buried tunnel.

[0002]

2. Description of the Related Art The conventional final joining of a submerged box involves sealing the joint.
They were surrounded by a top pile, mortar was cast and hardened, then the inside was stripped off to complete the tunnel, or a connection box was built into the existing box, which was extruded and joined together.

[0003]

In the conventional method, the amount of reaming is large and the operation is difficult. Also, in the method of extruding and joining the connection box, the joint end of the connection box does not join well with the end of the buried box due to the displacement of the buried box,
A large force was required even if the jacks were pulled together to join.

[0004] In order to solve the above problems, the present inventors have separately proposed to use a connection box which can be extended and contracted in the axial direction and to perform final joining using water pressure. At the time of final joining using water pressure, a room for applying water pressure is formed in the connection box, and a predetermined water pressure is applied to the room (hereinafter referred to as a water pressure chamber), but the sealing of the water pressure chamber is not necessarily sufficient, so Applying stable water pressure for a long time involves complicated operations.

The present invention has been made to solve such a problem, and provides a connection box which can apply a stable hydraulic pressure to the hydraulic chamber for a long time with a simple operation even if the sealing of the hydraulic chamber is somewhat incomplete. Is what you do.

[0006]

The invention according to claim 1 of the present application comprises (A) an inner box slidable to each other and an outer box having a partition wall. Opened in opposite directions on the remote side, (C) a water pressure chamber is formed by the outer wall, inner wall and inner wall inside the outer wall, and (D) a water pipe that can be opened and closed is installed in the water pressure chamber. This is a connecting box for submerged box joining, which is open and has a water pressure tower communicating with its upper part.

The invention according to claim 2 is characterized in that (A) two buried boxes having a partition wall slightly inside the connection end face are engaged with an expandable flexible joint, and (B)
A water pressure chamber is formed by the partition walls and the peripheral wall including the flexible joint. (C) The water pressure chamber has an openable water injection pipe, and a water pressure tower communicates with an upper part thereof. It is a connection box for immersion box joining.

According to the first aspect of the present invention, two boxes are manufactured to have a similar shape in cross section, and a smaller cross section is used as an inner box, and a larger cross section is used as an outer box. The invention according to claim 2 is directed to a connected and extendable connection box (hereinafter referred to as a sliding connection box), butts two boxes having the same cross-sectional shape in the axial direction, and connects the butted portions with a flexible joint. For flexible telescopic connection boxes (hereinafter referred to as flexible joint type connection boxes).
In any case, the connection boxes are extended by water pressure (although the pulling by jacks may be used at the start of the pressure welding work), and the connection boxes are connected between the existing buried boxes (hereinafter referred to as existing boxes) or between the existing boxes and the vertical caisson. Since they are common in certain respects, both will be described without distinction.

In the case of a sliding connection box, the hydraulic chamber is a sealed room inside the outer box partition. In the case of a flexible joint type connection box, the water pressure chamber is formed of two partition walls and a peripheral wall (including a flexible joint). It is a closed and enclosed room.

The present invention relates to a connection box in which a water pressure tower is provided in the water pressure chamber and a predetermined water pressure is applied to the water pressure chamber according to the height of the water column, and the water pressure chamber is adjusted by a simple operation of adjusting the height of the water column. Can be kept constant for a long time.

In particular, if the height of the water column is set to be the same as the height of the water pressure tower (the state where water constantly overflows),
There is no need to adjust the height of the water column, just press in the water. In this way, even if the sealing of the water pressure chamber is somewhat imperfect due to the installation of the water pressure tower, a stable operation of the water pressure chamber can be applied for a long time with a simple operation. Can be pressed.

The hydraulic tower of the present invention is removed after the joining of the connecting box and the existing box is completed, so it is preferable to install the tower so that the removing operation can be easily performed.

The existing box in the present invention means not only an existing buried box but also an existing standing caisson.
The joining method is exactly the same in any case.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a connecting box according to the present invention.

FIG. 1 is an axial sectional view showing a state in which the sliding connection box according to the first aspect is installed at a joint between an existing box 8 and a side wall 9 of an upright caisson. In this sliding connection box, the inner box 5 and the outer box 6 are engaged with each other at the sliding portion 7A, and the walls 1, 2 and 3 are formed by the wall surface and the partition wall of the connection box. The room 1 is a hydraulic chamber, and a hydraulic tower 4 is provided on the upper surface of the room 1. In the room 1, a water injection pipe is provided in addition to the water pressure tower 4.

The joining method will be described.

(1) Receiving jaws 11 for indicating the installation position of the end of the connection box and guiding the movement of the connection box are provided on both sides of the joint end between the existing box 8 and the side wall 9 of the vertical caisson.

(2) The connection box is hung down on the joint 11 on the receiving barn 11 which is a predetermined position, and the connection box is installed in a state where the inner box 5 is inserted deeply into the outer box 6. (Fig. 1) (3) Water is injected from the water injection pipe and pushed up into the water pressure tower 4 to adjust the water level.

(4) The room 1 is expanded and the end of the inner box 5 is pressed against the existing box 8, and the end of the outer box 6 is pressed against the side wall 9 of the vertical caisson.

(5) The valve of the drain pipe 12 of the existing box is opened to drain the water in the room 2 and strengthen the hydraulic pressure welding. (6) Open the valve of the drain pipe 13 of the vertical caisson to drain the water in the room 3 and strengthen the hydraulic pressure welding. With the above, the final joining of the existing box and the side of the caisson is completed, removal of the hydraulic tower,
Removal of the lid, concrete casting of the joint, finishing in the box, etc. are performed as usual.

In the above joining method, the connection box may be pulled by a jack before the hydraulic pressure welding.

FIG. 2 is an axial sectional view showing a state in which the flexible joint type connection box according to the second aspect is installed at the joint between the existing box 8 and the side wall 9 of the vertical caisson. In this flexible joint type connection box, the A press contact end 5A and the B press contact end 5B are engaged by a flexible joint portion 7B, and the walls 1, 2 and 3 are formed by the wall surface and the partition wall of the connection box. Room 1
Is a hydraulic chamber, and a hydraulic tower 4 is provided on the upper surface of the chamber 1. In the room 1, a water injection pipe is provided in addition to the water pressure tower 4.

The joining method is the same as in FIG.

[0024]

According to the present invention, even if the sealing of the hydraulic chamber is somewhat incomplete,
With a simple operation, stable hydraulic pressure can be applied to the hydraulic chamber for a long time.

[Brief description of the drawings]

FIG. 1 is an axial vertical sectional view showing a state in which a sliding connection box according to claim 1 is installed at a final joint.

FIG. 2 is an axial sectional view in a state where the flexible joint type connection box according to claim 2 is installed at a final joint.

[Explanation of symbols]

1. Hydraulic chamber, 2. Existing cabin side room, 3. Vertical caisson side room, 4. Hydraulic tower, 5. Inner box, 5A..A pressure contact end, 5B..B pressure contact end, 6. ..Outer box, 7A..Sliding part,
7B ··· Flexible joint part, 8 ··················································· 11
・ ・ Drain pipe on the existing box, 13 ・ Drain pipe on the caisson.

Claims (2)

(57) [Claims] (A) An inner box slidable to each other and an outer box having a partition wall. (B) The inner box and the outer box open in opposite directions on the farthest side, and (C) A water pressure chamber is formed on the inner side of the outer box bulkhead, the outer wall and the surrounding wall and the inner box. (D) The water pressure chamber has an openable water injection pipe and a water pressure tower communicates with the upper part thereof. A connection box for connecting a submerged box. (A) A partition having a partition wall slightly inside the connection end face.
(B) A hydraulic chamber is formed by the two partition walls of the submerged box and the peripheral wall including the flexible joint. (C) The hydraulic chamber is opened and closed. A connection box for submerged box joints, characterized in that a possible water injection pipe is opened and a water pressure tower communicates with the top of the pipe.