JPH0729100U - Drainage material for sprayed concrete surface in tunnel construction - Google Patents

Abstract

(57) [Summary] [Purpose] Drain the spring water from the surface of the primary sprayed concrete that has been sprayed onto the ground such as in tunnel construction. [Structure] A water-impermeable impermeable sheet 1 such as a vinyl chloride sheet and a relatively water-permeable woven cloth or plastic net 2 are polymerized, and the water-impermeable sheet 1 and the woven cloth or plastic net 2 are combined. Can be sewn in the vertical direction at regular intervals, and a flexible corrugated perforated pipe 4 can be inserted and fixed in the vertical direction between the impermeable sheet 1 and the woven cloth or the plastic net 2 in accordance with the location of the spring water at the construction site. Thus, the drainage material 5 is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drainage material that drains downwardly the spring water that emerges on the surface of the primary shotcrete of a tunnel during tunnel construction.

[0002]

[Prior art]

 Normally, the primary concrete is sprayed on the ground of the excavated tunnel, but if there is spring water from the ground, the primary sprayed concrete will be washed away, so a non-woven cloth drainage material will be applied to the ground. The primary concrete was sprayed on it. In this case, since the drainage material is directly attached to the ground (rock bed), there is not much tendency for clogging even with non-woven fabric.

[0003]

[Problems to be solved by the device]

 However, even if the drainage material is attached to the natural ground and the spring water escapes to the underground as in the above-mentioned conventional method, and the primary spray concrete construction is carried out, the primary spray concrete penetrates from the place where the rock bolt and the H-shaped support work are installed. There was a problem that water was often generated.

In addition, the width of the conventional drainage material is about 15 to 20 cm, which cannot cover the whole spring location, and there is a problem that the drainage work is incomplete even if it is patched. .

Further, since the back surface of the conventional drainage material is formed of a non-woven fabric, free lime from the primary shotcrete is deposited in the non-woven fabric after long-term use, causing clogging, and finally the drainage function. There was a problem that it disappeared.

Further, since spring water often occurs simultaneously from a plurality of locations, it is difficult for the conventional drainage material to cover it at once.

The present invention is intended to provide a sprayed concrete surface drainage material for tunnel construction for the purpose of solving the above conventional problems.

[0008]

[Means for Solving the Problems]

 According to the present invention, a water-impermeable sheet and a woven cloth or plastic net having relatively coarse mesh are polymerized, and the water-impermeable sheet and the woven cloth or plastic net are sewn in a longitudinal direction at a constant interval to form the water-permeable sheet. The above-mentioned problems were solved by adopting a means of vertically inserting and fixing one or more flexible corrugated perforated pipes between the woven cloth or the plastic net according to the spring location.

[0009]

[Action]

 According to the present invention having the above configuration, one or more corrugated perforated pipes are inserted between the impermeable sheet and the relatively coarse woven cloth or plastic net so as to be located at the spring location at the construction site. Then, fix the water-impermeable sheet on the front side of the primary spraying concrete wall with the front side facing up. All drainage materials are flexible and conform to the uneven surface of the primary spray concrete wall and fixed. The spring water from the wall surface of the primary sprayed concrete penetrates the woven cloth or plastic net, is guided to the corrugated perforated pipe, and is drained downward.

[0010]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. A water-impermeable impermeable sheet 1 such as a vinyl chloride sheet and a water-permeable relatively woven cloth or plastic net 2 are polymerized and The impermeable sheet 1 and the woven cloth or the plastic net 2 are sewn in the longitudinal direction 3 at regular intervals, and the flexible corrugated perforated pipe 4 is fitted to the spring location at the construction site. A drainage material 5 is formed so that it can be inserted and fixed in the longitudinal direction between 1 and a woven cloth or a plastic net 2.

Next, the operation of the embodiment of the present invention will be described. At the construction site, the drainage material 5 in which the corrugated perforated pipe 4 is inserted and fixed between the impermeable sheet 1 and the woven cloth or plastic net 2 having a relatively coarse mesh according to the location of the spring is shown in FIG. The water-impermeable sheet 1 side is attached to the primary sprayed concrete wall B sprayed on A with the water-impermeable sheet 1 side facing up, and the rivets 6 are fixed. In this case, since the drainage material 5, including the corrugated perforated pipe 4, is all made of a flexible material, the drainage material 5 fits into and is fixed to the uneven surface of the primary spray concrete wall B.

If the spring water is in a wide range, the ends of the plurality of drainage materials 5 are superposed and attached to the above-mentioned primary sprayed concrete wall B by tacking and fixing them.

In addition, if the spring water is in a narrow range, the drainage material 5 may be cut in the vertical direction to have a narrow width.

[0012] When the drainage material 5 is attached to the primary sprayed concrete wall B and fixed by rivets 6, the spring water that has come out to the surface of the primary sprayed concrete wall B is woven or plastic. After passing through the net 2, it is guided to the corrugated perforated pipe 4 and drained downward.

[0013]

[Effect of device]

 Since the present invention is as described above, the position of inserting the corrugated perforated pipe between the impermeable sheet and the woven cloth or plastic net having a relatively coarse mesh can be arbitrarily selected at the construction site according to the spring location. The spring water is drained extremely efficiently. In addition, since the comparatively coarse woven cloth or plastic net is used, free lime in the primary spray concrete does not deposit on the woven cloth or plastic net, clogging does not occur, and the drainage effect is achieved. Can be raised. Furthermore, since the drainage material is made of a flexible material, it fits well to the uneven surface of the primary sprayed concrete wall and is fixed in close contact, resulting in good drainage efficiency. Furthermore, since the drainage material is attached to the front surface of the primary sprayed concrete wall, the drainage material is in close contact with the primary sprayed concrete wall, and spring water does not occur from the rivet part and the supporting work installation place.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a water impermeable sheet and a relatively coarse woven cloth or a plastic net are sewn together in a drainage material for sprayed concrete surface in a tunnel construction of the present invention.

FIG. 2 is a perspective view of a sprayed concrete surface drainage material in the tunnel construction of the present invention.

FIG. 3 is a perspective view showing a usage state of sprayed concrete surface drainage material in the tunnel construction of the present invention.

[Explanation of symbols]

1 impermeable sheet, 2 coarse woven cloth or plastic net, 3 stitching, 4 flexible corrugated perforated pipe, 5 drainage material.

Claims (1)

[Scope of utility model registration request] 1. The water-impermeable sheet is polymerized with a woven fabric or plastic net having a relatively rough mesh, and the water-impermeable sheet and the woven fabric or plastic net are sewn in the longitudinal direction at regular intervals to obtain the water-impermeable sheet. And a woven cloth or a plastic net. One or more flexible corrugated perforated pipes are formed so that they can be inserted and fixed in the longitudinal direction according to the location of spring water.