JPH0322397Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a water-stopping structure in civil engineering work that is useful for waterproofing the outer walls of structures such as tunnels using the cut-and-cut method.

For example, in the construction of subway tunnels in urban areas, box tunnels are used using the cut-and-cover method. In order to maintain the shaft, a strut made of H-shaped steel is passed over the width line of the tunnel, and an intermediate pile made of H-shaped steel is erected in the middle of the width line.

Therefore, when pouring concrete for a tunnel wall, the concrete wall crosses the middle of the intermediate pile and the middle of the strut, but after the tunnel is constructed,
These intermediate piles and struts are cut at the side of the concrete wall and can be taken out to the outside if necessary.

By the way, in order to prevent underground water from leaking into the tunnel, a waterproof sheet is placed around the four circumferences of the tunnel wall. Therefore, it is necessary to stop water at the penetration point,
That is, a water stop means is required for the penetrating portion between the tunnel wall side forming the compartment area to be waterproofed and the waterproof sheet side spread over the surface of the ground forming the water-wet area.

(Prior art) Conventional water-stopping methods for this purpose include cutting out the waterproof sheet, making a notch hole through which the H-shaped steel passes, and gluing the edge of the notched hole to the H-shaped steel with adhesive.
Alternatively, a structural method was adopted in which the periphery of the notch hole was folded in along the shape of the H-shaped steel and then glued to the H-shaped steel.

(Problem that the invention aims to solve) However, the conventional structure described above not only has poor workability because it requires tedious manual work on site, but also makes it difficult to adhere to a flat surface. Since it is difficult to obtain, strong adhesion is difficult, and as a result, there is a problem that watertightness is not ensured and water leakage becomes a problem.

Therefore, an object of the present invention is to provide a water-stopping structure for civil engineering work that has good workability and high watertight reliability.

(Means for solving the problem) In order to achieve the purpose, in the configuration of the present invention, steel shapes such as H-shaped steel, U-shaped steel, and L-shaped steel penetrate the boundary surface of the compartment area where the waterproof sheet is spread. In the water-stopping structure of the building, a flange plate is welded and overhanged at the point where the shaped steel passes through the boundary surface, and a notch hole is made in the part of the waterproof sheet that penetrates the shaped steel to allow the shaped steel to escape. and the periphery of the notch hole of the waterproof sheet is
A structural system is adopted in which the flange plate is fixed in an overlapping manner on the plate surface on the compartment area side.

(Example) Hereinafter, the configuration of the present invention will be specifically described based on an example shown in FIGS. 1 to 3.

For example, an H-shaped steel 3 such as an intermediate pile that penetrates the interface between a partitioned area 1 to be waterproofed such as a tunnel shaft and a water-wet area 2 such as a tunnel ground is erected on the ground forming the water-wet area 2. A rectangular flange plate 4, which is divided into left and right halves by a dividing line 4a, is butt-welded to the penetrating point 3a, and the H-shaped steel 3 has an H-shape notched in the middle of the dividing line 4a. It passes through the notch groove 4b.

On the other hand, a rectangular notch hole 5a is made in the waterproof sheet 5 spread over the surface of the water-wetted area 2 by an amount of adhesive A that is smaller than the area of the flange plate 4, and one of the four circumferences of the notch hole 5a. A notch 5b is cut into the H-shaped steel 3 to form a slit when inserted from the side.

However, the area around the notch hole 5a of the waterproof sheet 5 is
After being inserted from the side onto the plate surface of the flange plate 4 on the compartment area 1 side, the flange plate 4 is attached with adhesive 6.
It is surface-adhered to the polymerized surface of.

In the water-stop structure of the embodiment configured in this way, since the notch holes 5a can be punched in advance in the waterproof sheet 5, the work of assembling the water-stop structure is easy. The abutting part between the shaped steel 3 and the flange plate 4 is reliably made watertight by welding, the overlapping part between the flange plate 4 and the waterproof sheet 5 is made strongly watertight by surface adhesion, and the part of the notch 5b is made watertight. By stretching an auxiliary sheet to ensure that the water-wet area 2 and the divided area 1 are sealed securely.

In the above embodiment, the H-shaped steel 3 can of course be made of various types of steel, such as U-shaped steel or L-shaped steel, and the flange plate 4 and the waterproof sheet 5 can be bonded together using adhesives or other methods. , welding, or a fixed joint structure using various fasteners.

Here, we will give an overview of the construction process for the BOX tunnel to which the water stop structure of the above-mentioned example is applied.
This will be explained with reference to FIGS. 4 a to 4 c and FIGS. 5 to 7.

(1) The process shown in Figure 4a (see Figure 5) This process is the process up to the point where the lower end of the tunnel wall 7 is poured with concrete on the bottom of the dug-in tunnel, which is the zone 1 to be waterproofed. That is, between the sheet piles 8 on both sides of the digging tunnel 1, there are struts 9 made of H-shaped steel in two stages, upper and lower, and near the center of the digging tunnel 1, there is an intermediate beam made of H-shaped steel. A pile 10 is erected in the ground as a water-wet area 2 by driving.

On the other hand, leveled concrete 11 is placed on the ground 2.
is poured, and the lower waterproof sheet 1 is placed on the surface.
2 is expanded, and the portion where the intermediate pile 10 penetrates the lower waterproof sheet 12 is assembled by the water-stop structure of the embodiment.

Finally, the lower end of the tunnel wall 7 is cast on the upper surface of the lower waterproof sheet 12, and a layer of protective mortar 7a is formed on the lower end of the tunnel wall 7, as shown in FIG. ing.

Note that the left and right slack portions of the lower waterproof sheet 12 are covered by a flameproof protective sheet 14 sandwiched between the tunnel wall 7 and the formwork 13.

(2) The process shown in Figure 4b (see Figure 6) is the second step to the previous step, in which the entire tunnel wall 7 is poured, the lower struts 9 are cut and removed, and the lower waterproof sheet is removed. 6, the slack part of the lower waterproof sheet 12 is pulled up along the tunnel wall 7, and the lower half of the tunnel wall 7 is buried in the ground 2. At this time, as shown in FIG. The pulled-up portion is welded to the holding sheet 16 fixed to the tunnel wall 7 by driving rivets 15,
Retained.

In addition, during this process, the left and right sides of both struts 9 and the upper part of the intermediate pile 10 through which each tunnel wall 7 penetrates are assembled by the water-stopping structure of the embodiment.

(3) The process shown in Fig. 4c (see Fig. 7) is the final step, after the upper half of the tunnel wall 7 is covered with the upper waterproof sheet 17, the upper strut 9 and the intermediate pile 10 are is cut and removed, and the entire tunnel wall 7 is buried in the ground 2. In this case, as shown in FIG. What is the upper edge?
Welded and integrated using a self-propelled welding machine.

(Function) (Effect of the invention) As described above, according to the water-stopping structure for civil engineering work according to the present invention, a flange plate is welded to the water-stopping boundary surface of the shaped steel to form an overhang, and a notch in the waterproof sheet is Since the area around the hole is configured to be fixed to the flange plate through polymerization, the work of assembling the water stop structure is facilitated, and the part where the water stop structure is assembled is reliably made watertight, thereby making the water stop structure more watertight. This has the effect of improving the workability and reliability of water structures.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a water stop structure for civil engineering work showing an embodiment of the present invention, Fig. 2 is an isolated view of Fig. 1, and Fig. 3 is a side sectional view taken along the - line in Fig. 1. , Figures 4a to 4c are explanatory diagrams of each process of tunnel construction to which the water stop structure of the embodiment is applied,
FIG. 5 is a sectional view taken along the - line in FIG. 4a,
FIG. 6 is a sectional view taken along the - line in FIG. 4b;
FIG. 7 is a sectional view taken along the - line in FIG. 4c. 1...Divided area, 2...Water wet area, 3...Shaped steel,
3a... Penetration point, 4... Flange plate, 5... Waterproof sheet, 5a... Notch hole.

Claims (1)

[Scope of utility model registration request] In a water-stopping structure for a building in civil engineering work where a shaped steel penetrates the boundary surface of a compartment area where a waterproof sheet is spread, at the point where the shaped steel passes through the boundary surface,
The flange plate is formed in an overhanging manner, and a notch hole is opened in the part of the waterproof sheet through which the mold steel passes, and the area around the notch hole of the waterproof sheet extends over the part of the flange plate. A water-stop structure for civil engineering work that is characterized by being overlaid and fixed to the board surface on the compartment area side.