JPS60119899A - Joining method of sinking embedded case - 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] The present invention relates to a silk method for sinking boxes.

The immersion construction method, in which a lifting platform is used to construct tunnels on the bottom of C water that cross canals, ports, etc., and boxes manufactured on the ground (submerged boxes) are successively connected underwater is now available.

In this construction method, the work to join the boxes together after they are sunk is mainly carried out under water, and the single cofferdam method, panel construction method, etc. are used, but there are limits to the work in deep water.

Also, the joints of the submerged box can sufficiently withstand water pressure ()
High watertightness must be ensured (J).

This defense was made in view of the above circumstances, and the purpose is to provide a method of connecting clasps for immersed boxes with excellent watertightness and workability for tJf with limited water depth. .

? However, in the present invention, a telescopic four-way ♀Ii construction box with a water-stop pulp chamber right at the joint end is sunk between the existing installations facing each other, and the end of the water-stop valve chamber is pulled out between the existing installations. After connecting the edges and draining the water present at the joint between the existing box and the newly installed box to create a crimp bond between the new box and the existing box, preventing the new box from retreating and draining the water within the newly installed surface for the first time, it is buried. This relates to a method of joining immersed boxes, which is characterized by the need to perform back work.

Next, one embodiment of the present invention will be described with reference to the drawings.

[B] Existing boxes Note: In Figure 1, 1 is the existing box.

The tail end of the existing box 1 is closed with bulk spatulas 1 to '11, and the bottom is temporarily supported by vertical jacks 12 or the like and fixed to the bottom of the water.

A pulling jack 13 is installed in the center of the existing drawing box 1-11 to pull the newly installed box 2, which will be described later.

A peripheral eaves 1j3 is provided protruding from the peripheral edge of the tail end of the existing box 1,
Put gaskets 1-14 all around the eaves 15 (=J).

In addition, when the newly installed box 2 is brought to the existing box 1, the existing box 1
J'3 (
A water supply pipe and a supply/exhaust pipe are provided externally through the bulkhead 11 to enable drainage and air supply.

As shown in the figure, the newly installed box 2 has a fixed image 22 having the same shape as the cross section of the existing box 1, and a slide box 21 that can freely move l, i, j. It will happen.

In other words, in the newly installed box 2, the fixed image 22 such as the slide box 21 is placed on the coaxial line l, and the water stops! The structure is such that the slide box 21 can be slid while maintaining the l.

The outer periphery of the sliding box 21 is provided with a band-shaped protruding band 26 that protrudes in both directions, and one end of the fixed box 22 is exteriorized by forming an enlarged part with a size that locks onto the protruding band 26. A waterproof rubber 29 is interposed between the sliding parts of both 21 and 22, so that when the slide box 21 slides in one direction of the existing box, the gap between the outer periphery of the slide box 21 and the inner circumferential surface of the fixed image 22 is The structure is such that a honeymooned space 4 is formed.

Mortar etc. from inside the cabinet in this space 4? 4] Open the injection holes 43 in the flies 1 to 21 by hand.

Inside the new box 2, in addition to bulkheads 23 and 24 provided at both ends of the slide box 21, there is a bulkhead 27 provided at the end on the side where the slide box 21 is placed outside. A chamber 28 is formed between /I and 27.

There is a bulkhead 23.24 inside the box 2'1 to the fly 1.
A water stop valve space 25 is formed which accommodates a harast tank (not shown) partitioned by a water stop valve.

Further, inside the newly installed box 2, a connecting chamber 41 is disposed through the bulkheads, and the space inside the fixed picture 22 such as the sliding box 21 is communicated.

In addition, a water injection pipe, a drain pipe d3, and one end of an air valve are connected to the inside of the chitonba 28 to perform water injection, one-on-one water, etc. (14 pieces).

In addition, contrary to the above, the edge of the slide box 21 is the fixed image 22.
(1η can also be formed) such that the outer circumference of the

Next, I will explain how to continue with 1.

[1] Submerging the new box 2 The newly installed box 2 is transported and lowered by a crane or purge (pontoon), etc., and placed in a position facing the tail end of the existing box 1 and the vertical jib 12 etc. Use temporary support.

When sinking the new box 2, a known ultrasonic measuring device 51 or the like is placed on the outer periphery of the existing boxes 1 and 1 to 21 to correct the sinking position of the new box 2.

The water in the drain 28 of the newly installed box 2 enters at the same level as the outside water level before it is submerged.

After completing the sinking of the new box 2, the flies 1 to 21 and the fixed image 22 are fixed together and the holes 1 to 1 are removed.

[B] Pulling the fried box U (Fig. 2) Next, pull the tip of the fly box 1 to the existing box 1 side (= JsuC, pull iIL' - pusher 13) and pull the bulk spatula 1 ~23 and fly 1-rain 21 to the existing 141i
Draw to 1.

At 11,1, in parallel with the work of pulling the box 21 to the existing box 1 side and flooding it, continue pouring water into Cfj = Nha 2B.

This is inside the block 17 and 2ε3. It requires a considerable amount of force to pull the body, so we decided to let water enter this chamber 2ε3 to offset the pressure inside the body 28 and the surrounding water pressure. C
, This is to perform pull-in I based on the weight.

As a result, only the slide box 21 slides in one direction between the existing slide boxes 21 and a space 4 is formed between it and the inner surface of the fixed image 22 mounted on the slide box 21. (Fig. 5) The slide box 21 that has been pulled up is pressed against the gasket 1-14 at the end of the existing gap 1, filling the space between the bulkheads with water.
1 chamber 3 is formed.

[C] Drainage of the derempa (hydraulic joint) (Fig. 3)'f17
When the water in the chamber 33 is started, the air pressure inside the chamber 33 becomes low, and the pressure inside the chamber 33 decreases, causing the pressure inside the chamber 33 to drop.
The slide box 21 is pressed against the existing space 1 by the water remaining in the space 8.

[2] After crimping the blocking mortar one-person fried box 21 to the existing space 1, pour mortar from inside the slide box 21 into the space 4 to fix the slide box 21 and the fixed image 22 together. Ru.

Furthermore, M lad mortar will be placed between the bottoms of the existing space 1 and new space 2, which were temporarily supported, and the water bottom.

As a result, each box is joined together.

[Bo1 drainage (Figure 4) Finally, drain the water in JiA・Nha 28.

When the high-pressure water in the chamber 28 is drained, the pressure in the chamber 28 becomes equal to the pressure in the other chamber 3, and until then the slide box 21 is pushed into the existing gap 1. However, since the space 4 created by sliding the slide box 21 was filled with mortar and fixed, the slide box 21 could not be moved back and the crimping force between the existing ones could be reduced. can be maintained.

Moreover, the mortar injected into the space 4 exhibits a water-stopping effect and significantly reduces the watertightness of the sliding portion of the newly installed space 2.

[Backfilling] After removing the bulkheads from each box, burying them inside the box, and connecting the PC cables to give tension and unifying the cables, backfilling is performed.

1.Other Examples In the above embodiment, mortar was injected into the space 4 to prevent the slide box 21 crimped into the existing space 1 from returning, but the following methods may also be considered.

(1) Method of pouring and covering concrete Place the formwork on the inner wall between the fixed picture 22 and the slide box 21, and slide the fly 1 to box 21 to the existing space 1 side! /
After this, concrete 1 to 2 is poured to fix both parts 21 and 22 together.

In this case, a bellows-shaped collapsible formwork, for example, can be used as the metal frame placed in the #11 box 2.

(2) Method of supporting on the RF contracting method A steel rod is provided between the fly 1 to the box 21, and the steel rod is placed between the fixed image 22 and the slide box 21 as a compressed material. It is also possible to stretch between .22 and 22.

(3) How to support concrete blocks on the inner wall (
Figure 6) Place concrete block 5 facing the inner wall surface of fixed block 22, place shirt 1G at the tail end of both concrete blocks 5, and move block 5 to concrete block 1 between existing construction space 1.
In this state, place early-strength concrete on the back of block 5. : Cast 51 etc. and fix flock 5 2
2. Also adopt the fixed blade method.

From the book yB Ming L-1 onwards, the following effects can be expected from the explanation.

(B) After applying pressure to the newly installed gap to 141 degrees, fix the sliding part between the newly installed gap.

Follow C, perform final drainage in the chamber and fly 1
~The box can be reversed, and the crimp is maintained, making it easier to bury the box.
Connect to C.

・,[1>♀Ii Other than sinking the installed box, rehetting work can only be done in-plane. .

Therefore, T can be applied safely and easily even at sites with large depths without being subject to water depth restrictions.

<C> If a method of injecting mortar into the sliding parts of the new construction is adopted, the water-stopping effect will be significantly improved.

[Brief explanation of drawings]

Figure 1: An explanatory diagram of one embodiment of the present invention Figures 2 to 4: An explanatory diagram of the connection method of the ♀Ji box Figure 5 Cross section of the sliding part of the fly I after Nislay 1 and the fixed image Enlarged view Figure 6: Explanation of other embodiments Diagram 1: Existing box 2: New installation 3: Chamber 11: Aim)
22; Fixed image

Claims (1)

[Claims] A new box with a telescopic structure having a pulp chamber at the joint end is installed between the existing λ・i surface u'''C'C and 1 water pal'7
Connect the end of 'I' to the edge of the existing box by pulling it in place, and remove any water present at the joint between the existing box and the new box.
) 1 to crimp between the new box and the existing box, and after the new box)
JI out! A method for joining immersed boxes, which is characterized by the step of backfilling after filling.