JP2528444Y2 - Sheet waterproofing material - Google Patents

Description

[Detailed description of the invention]

[0001]

INVENTION The present invention relates relates to a sheet waterproof material, in particular laid between such primary Lining in spring water drainage tunnel construction (shotcrete or segments, etc.) and the secondary Lining (Lining concrete) Sheet waterproofing material.

[0002]

BACKGROUND OF THE INVENTION Natomu (NATM) Construction by tunnel construction, the primary Lining such shotcrete or segments after hole wall dug tunnels natural ground, the secondary Lining Concrete later scold Da設I do. Such tunnel leakage secondary Lining concrete significantly degrades the durability in. Therefore, when the tunnel construction, so that after performing primary Lining, laying sheet waterproof material, performs pouring the final secondary Lining Concrete later that accordingly. If spring water drainage tunnel, by water guide the drainage member or drainage tube spring water was placed on each side lower portion of the hole wall through the sheet waterproof material from the primary covering cumene, as not to apply pressure to the secondary Lining Concrete Has become.

Conventionally, when constructing a spring drainage tunnel,
The sheet waterproof material, which is laid between the Lining and secondary Lining there are three types of divided in FIG. 3 (1) to (3).
That is, the first is a lamination of a buffer water-permeable sheet made of non-woven fabric or woven fabric and a flat waterproof sheet (FIG. 3).
(See (1)), the second is a single waterproof sheet with ribs (see FIG. 3 (2)), and the third is a single waterproof sheet with protrusions (see FIG. 3 ( 3 )). The waterproof sheet is made of plastic, and for example, an EVA sheet (ethylene vinyl acetate copolymer) or the like is used.

[0004] In the first type, there are a case where a water-permeable sheet for buffering and a flat waterproof sheet are previously integrated by whole or partial bonding, or a case where two sheets are separately mounted. In any event, the case of the first type, spring water from the primary covering cumene is discharged through the buffering permeable sheet. The buffer water-permeable sheet also functions as an isolation sheet to suppress cracking.
On the other hand, the second type and the third type, spring water is discharged through a space between the waterproof sheet and the primary covering cumene is ensured by the ribs or protrusions.

[0005]

An invention is, however, in the first type sheet waterproof material, since the waste water is carried out only through the medium of a buffer for water permeable sheets, drainage when spring water from the primary covering cumene became mass Inability to keep up, resulting in water stagnating all around the tunnel. At this time, or hindered in the secondary Lining gone fraught waterproof sheet to hit設前of secondary covering <br/> Engineering concrete, furthermore, when the pressure becomes higher, after casting two there is that problem that it takes the water pressure in the next Lining concrete results. Also,
In the second, third type, since buffering permeability sheet does not exist, by small portions spilled soil particles over a long period of time from the primary covering cumene, cause clogging of the drainage space, to deteriorate the drainage, the two that concentrated on some of the following footwear Engineering concrete pressure is applied, in the tunnel it was that the most unfavorable situation occurs. In the second type, the individual ribs provided on the waterproof sheet are further provided with primary ribs.
To close contact with covering cumene, when spring water occurs concentrated in a part, no longer completely drained, this reason, there is the water pressure is applied to focus on a part of the secondary Lining concrete.

In view of the above, it is conceivable to laminate and use a waterproof sheet with ribs or protrusions and a water-permeable sheet for buffering. A relatively flexible water-permeable sheet for buffer enters into the drainage space and adapts, causing a problem similar to that when laminated with a flat waterproof sheet. In view of the above, an object of the present invention is to provide a waterproof sheet material that can always maintain good drainage.

[0007]

The object of the present invention is to provide a cushioning permeable sheet and a ribbed waterproof sheet.
This is achieved by laminating the mesh sheets while sandwiching them.

[0008]

According to the present invention, by the shield effect of the buffering permeable sheet, to prevent the accumulation drainage space particles separated from the primary covering cumene is formed by a rib of the waterproof sheet with ribs. Further, the spring water generated concentrated on a part of the primary covering cumene leads to drainage space while widely dispersed through the buffer for water permeable sheet. Furthermore, by the net-like sheet sandwiched between the buffer water-permeable sheet and the ribbed waterproof sheet,
The cushioning water-permeable sheet enters between the ribs of the ribbed waterproof sheet and prevents the drainage space from being blocked. This allows
It is possible to ensure a reliably drained space ribbed waterproof in the sheet, it is possible to always maintain good drainage, also secondary as a mass spring water in the primary covering cumene occurred
Never disadvantage that the water pressure only part of Lining concrete is applied occurs, it is possible to remarkably improve the durability of the tunnel.

[0009]

FIG. 1 is a partially cutaway perspective view of a seat waterproofing material according to an embodiment of the present invention. 10 is a buffer for water permeable sheets by a nonwoven fabric or woven fabric, subjected to damping and edge cutting of the primary Lining and secondary covering <br/> Engineering, to prevent cracking of the concrete. Reference numeral 12 denotes a ribbed waterproof sheet made of an EVA (ethylene vinyl acetate copolymer) sheet, and a drainage space 15 is formed between the individual ribs 14. Reference numeral 16 denotes a polyethylene net-like sheet, which prevents a relatively flexible buffer water-permeable sheet from entering between the ribs 14 of the ribbed waterproof sheet 12. The sheet waterproof material 18 is formed by sandwiching the net-like sheet 16 between the buffer water-permeable sheet 10 and the ribbed waterproof sheet 12 and partially laminating the sheet.

FIG. 2 is a structural diagram of a spring drainage tunnel using a sheet waterproof material. In tunnel construction, first, subjected to a primary Lining 24 such shotcrete or segment tunnel bore wall 22 that is drilled into natural ground 20. If a lock bolt (not shown) is driven in, the head is cut off leaving the nut. Next, move the center of the sheet waterproof material 18 to the tunnel center, will stop the primary covering cumene pressing plate and the concrete pin toward the top end on both sides. At this time, the sheet waterproofing material 18 is used as the buffer water-permeable sheet 1.
0 apply to the primary covering Kumen. In addition, a drainage material or a drainage pipe (not shown) is provided at a lower portion on both sides of the hole wall 22. If the laying of roofing membrane material 18 is completed, the pouring of the secondary Lining concrete 26.

[0011] By between the primary Lining and secondary Lining a buffer for water permeable sheet 10, since the damping and edge cutting is made Cracking of secondary Lining concrete 26 is prevented. The spring water generated on the primary lining surface passes through the buffer water-permeable sheet 10 and the mesh sheet 16 and enters the drainage space 15 formed between the ribs of the ribbed waterproof sheet 12, and the drainage space By 15, water is guided to a drainage material or drainage pipe installed at the lower part on both sides of the hole wall 22.

[0012] Here, by the shield effect of the buffering permeable sheet 10 prevents particles separated from the primary covering cumene from accumulating in the drain space 15 formed by the ribs 14 of the ribbed waterproof sheet 12. Moreover, even if spring water occurs concentrated in a part of the primary covering cumene, buffering permeable sheet 1
Wide drainage space 15 while widely dispersed throughout
Can be led to. Moreover, the water-permeable sheet for buffer 10
Since the mesh sheet 16 is sandwiched between the waterproof sheet 12 and the ribbed waterproof sheet 12, even after a long time has passed after the sheet waterproofing material 18 has been
The drainage space 15 can be reliably held without entering between the ribs 14. Thus, it is possible to always maintain good drainage, never problem that water pressure only a portion of the secondary Lining concrete 26 is applied also occurs as a mass spring water occurs in the primary covering cumene, tunnel Can be significantly improved in durability. Also, the rib effect of the ribbed waterproof sheet 12 makes it difficult for the sheet waterproofing material 18 to be sagged at the top end during construction.

In the above-mentioned embodiment, the sheet waterproofing material is configured such that a buffer water-permeable sheet, a net-like sheet, and a ribbed waterproof sheet are partially bonded in advance and integrated.
Leave divided into each sheet, or to be laid in this order on the primary covering cumene, or or previously partially bonded by buffering pervious sheet and the net-like sheets, previously partially bonded only waterproof sheet with net-like sheets and ribs You may do it. The material of the mesh sheet or the waterproof sheet with ribs is
Not limited to polyethylene and EVA, various plastic materials can be used.

[0014]

According to the above present invention, according to the invention], and a buffer for water permeable sheet and the ribbed waterproof sheet was laminated while sandwiching between the net-like sheets, by the shield effect of the buffering permeable sheet, from the primary covering Kumen prevented from accumulating in the waste water space separated particles are formed by the ribs of the waterproof sheet with ribs, also, spring water generated concentrated on a part of the primary covering cumene widely through buffering permeability in the sheet It is led to the drainage space while dispersing, and furthermore, the mesh-like sheet sandwiched between the cushioning water-permeable sheet and the ribbed waterproof sheet allows the buffering water-permeable sheet to enter between the ribs of the ribbed waterproof sheet, thereby forming a drainage space. With ribs configured to prevent blocking
While ensuring the drainage space in the waterproof sheet, it can always maintain good drainage,
Never a problem that only water pressure is applied a portion of the secondary Lining concrete as a large amount of spring water in the primary covering cumene occurs occurs, it is possible to remarkably improve the durability of the tunnel.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of a waterproof sheet according to an embodiment of the present invention.

FIG. 2 is a structural view of a spring discharge tunnel.

FIG. 3 is an explanatory view showing an example of a conventional sheet waterproofing material.

[Explanation of symbols]

 Reference Signs List 10 Water-permeable sheet for buffer 12 Waterproof sheet with ribs 15 Drainage space 16 Net-like sheet 18 Sheet waterproof material

Claims (1)

(57) [Scope of request for utility model registration] 1. A sheet waterproofing material, wherein a water-permeable sheet for cushioning and a waterproof sheet with ribs are laminated with a mesh sheet interposed therebetween.