JP3546115B2 - Waterproof panel mounting device for the final joint of a buried box - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a water-stop structure of a final joint of a buried box laid when a buried tunnel is constructed.
[0002]
Problems to be solved by the prior art and the invention
Conventionally, when constructing a submerged tunnel, a submerged box is submerged and connected sequentially, and the final joint of the submerged box is generally connected by a water stop panel method. However, since the water stop panel system temporarily receives the reaction force of the rubber gasket due to drainage, it is necessary to install a strut steel material to receive the reaction force between the end faces of the submerged box by the work of the diver.
[0003]
In addition, it is difficult to install the water stop panel on the bottom surface after installing the water stop panel on the side surface, and the work time of the diver often becomes long. Further, it takes time and effort to secure the water stoppage between the water stop panels, resulting in an increase in cost.
[0004]
Therefore, when connecting the final joint of the submerged buried box, a technology that should be solved in order to eliminate the installation of strut steel, simplify the installation of the water stop panel, reduce the work of the diver and minimize the cost Therefore, an object of the present invention is to solve this problem.
[0005]
[Means for Solving the Problems]
The present invention has been proposed in order to achieve the above object, and in the water stopping structure of the buried box final joint portion which is sequentially sunk and connected, the water stopping panel includes an outer panel and an inner panel, In addition, an inflatable rubber bag is interposed therebetween, and an electromagnet is installed on the outer wall surface of the final joint of the submerged box to enable the outer panel to be attracted, and a guide is projected on the outer wall surface. And a guide groove for engaging the guide is provided on the outer panel. Further, when the solidified material is press-fitted into the rubber bag and expanded, the end face of the sunk box is pressed against the end of the rubber bag. And a waterproof structure of a final joint of a submerged box in which a tube-shaped packing is provided between the rubber bag of the waterproof panel and the rubber bag of the waterproof panel adjacent thereto. .
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 3 show a waterproof panel 10 at the final joint portion of a submerged box. An outer panel 11 and an inner panel 12 made of steel or precast concrete are combined and an inflatable rubber bag 13 is interposed therebetween. Is interposed. The rubber bag 13 is attached to the lower surface of the outer panel 11 and the upper surface of the inner panel 12, and by injecting a fluid from an inlet 14 protruding from the upper surface of the outer panel 11, as shown by a two-dot chain line. The outer bag 11 and the inner panel 12 are formed so that the rubber bag 13 expands and separates. Further, guide grooves 15 are provided at both left and right ends of the outer panel 11. The pitch of the guide grooves 15 is the same as the interval between the guides 20 projecting from the outer wall surface of the submerged box described later.
[0007]
FIGS. 4 and 5 show the final joint 16 of the submerged box, and a stepped portion 18 is provided on the end face of the submerged box 17, and the inside of the submerged box 17 is shielded by a bulkhead 19. Guides 20 are provided at predetermined intervals on the outer wall surface of the submerged box 17, and as shown by a two-dot chain line, when the guide groove 15 is The water panel 10 is accurately positioned and mounted on the final joint 16 of the submerged box. Therefore, it is not necessary to finely adjust the mounting position when the water stop panel 10 is mounted.
[0008]
Here, an electromagnet 21 is installed on the stepped portion 18. The electromagnet 21 is buried at an appropriate interval on the outer wall surface of the submerged box 17. When the steel water-stop panel 10 is mounted, the electromagnet 21 is operated from the inside of the submerged box 17 to apply a magnetic force to the back surface of the outer panel 11. Adsorb with. For example, when installing the water stop panel 10 on the bottom surface side of the final joint section 16 of the buried box, if the water stop panel 10 is set near the construction location, the water stop panel 10 is adsorbed to the buried box 17 by the electromagnet 21. Is held. Therefore, holding of the water stop panel 10 becomes easy, and the work of the diver, which has conventionally been performed for a long time, is significantly reduced.
[0009]
After the water stop panel 10 is sequentially mounted on the final joint 16 of the buried box, and the space between the buried boxes 17, 17 is covered with the water stop panel 10, as shown in FIG. The hose 22 is connected to the inlet 14 thus set. In the first step, hoses 22 are respectively connected to the inlets 14 of every other water stop panel 10, and a cement-based or similar solidifying material 23 is pressed into the rubber bag 13. At that time, the rubber bag 13 expands and the right and left ends of the rubber bag 13 press against the end faces of the sunk boxes 17, 17 and, as shown by the two-dot chain line in FIG. The part slightly protrudes from both sides of the water stop panel 10. A tube-shaped packing 24 is attached to the front end or the rear end of the rubber bag 13.
[0010]
The rubber bag 13 which has been inflated and hardened serves as a water-stopping material when draining water between the bulkheads 19 and 19, and also serves as a strut which receives a reaction force generated between the end faces of the submerged boxes 17 and 17. Fulfill. In addition, as shown in FIG. 7, a concave portion 25 (or a convex portion) is provided on an end surface of the immersion box 17.
[0011]
Then, after the solidified material in the rubber bag 13 is solidified, in the second step, hoses 22 are respectively connected to the inlets 14 of the remaining water stop panel 10, and the solidified material 23 is pressed into the rubber bag 13 to expand. Let it. At this time, the front and rear gaps between the water stop panels 10 and 10 are set to an optimum size in advance so that the adjacent water stop panels 10 do not interfere with each other due to the expansion of the rubber bag 13.
[0012]
As shown in FIG. 8, when each of the rubber bags 13 is cured, the solidified material is press-fitted into the tube-shaped packing 24 to expand the space between the rubber bags 13, 13 of the adjacent waterproofing panels 10, 10. Stop water. The packing 24 ensures that water is stopped between the water stop panels 10 and 10. Then, after the solidified material in the packing 24 is solidified and all the water stop panels 10 are fixed in a state where water is stopped, the operation of the electromagnet 21 is released.
[0013]
Then, the water between the bulkheads 19 of the final joint 16 of the buried box is drained by a pump, and the buried boxes 17 are hydraulically joined. At this time, stress acts on the water stop panel 10 in the direction in which the buried boxes 17 are drawn, but the cured rubber bag 13 becomes a reaction force in the tunnel axial direction. The concave portion 25 (or convex portion) described with reference to FIG. 7 serves as a support for the shearing force of the water stop panel 10 in the direction perpendicular to the tunnel axis.
[0014]
The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.
[0015]
【The invention's effect】
As described above, in the present invention, when mounting the water stop panel on the final joint of the buried box, positioning is performed by engaging the guide groove of the water stop panel with the guide protruding from the outer wall surface of the buried box, The water stop panel is attracted to the outer wall surface by the operation of the electromagnet. Accordingly, the positioning of the water stop panel is accurate and does not require fine adjustment, and the water stop panel has good holding properties. In addition, since the end face of the buried box is pressed against the end of the rubber bag expanded with the solidified material, high waterproofness can be ensured and the reaction force generated between the end faces of the buried box can be received by the rubber bag. For this reason, the installation of the strut steel material which has been required conventionally becomes unnecessary, and the work of the diver can be reduced.
[0016]
In this way, the waterproofness of the final joint of the submerged box is improved, water can be reliably stopped only with the waterproofing panel, the work of mounting the waterproofing panel is simplified, the construction period is shortened, and the cost is reduced. it can.
[Brief description of the drawings]
The figure shows an embodiment of the present invention.
FIG. 1 is a front view of a water stop panel.
FIG. 2 is a plan view of a water stop panel.
FIG. 3 is a bottom view of the water stop panel.
FIG. 4 is a cross-sectional view of the final joint of the buried box.
FIG. 5 is an enlarged plan view of a final joint part of the submerged box.
FIG. 6 is a cross-sectional view of the final joint of the submerged box in a state where the solidified material is pressed into the rubber bag of the water stop panel.
FIG. 7 is an enlarged cross-sectional view of a final joint portion of the immersion box in which a concave portion is provided on an end surface of the immersion box.
FIG. 8 is an enlarged cross-sectional view showing a packing provided between rubber bags of adjacent water stop panels.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Water stop panel 11 Outer panel 12 Inner panel 13 Rubber bag 15 Guide groove 16 Submerged box final joint part 17 Submerged box 20 Guide 21 Electromagnet 23 Solidified material 24 Packing

Claims (1)

In the watertight structure of the final joint of the buried box, which is successively sunk and connected, the waterstop panel consists of an outer panel and an inner panel, and an inflatable rubber bag is interposed between them. Installing an electromagnet on the outer wall surface of the final joint of the submerged box to allow the outer panel to be attracted, and providing a guide groove on the outer wall surface with a guide protruding from the outer wall surface and engaging the guide. Further, when the solidified material is press-fitted into the rubber bag and expanded, the end of the rubber bag is formed so as to be pressed against the end surface of the rubber bag, and the rubber bag of the water-stop panel is adjacent to the rubber bag. A waterproof structure at the final joint of a buried box, wherein a tube-shaped packing is provided between the waterproof bag and the rubber bag of the waterproof panel.

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