KR20130046645A - A tunnel waterproofing construction method - Google Patents

Abstract

PURPOSE: A tunnel waterproofing construction method is provided to fundamentally prevent the water leakage of lining concrete by inductively draining and blocking leachate due to the bedrock cut or crack of tunnel construction. CONSTITUTION: A tunnel waterproofing construction method comprises the following steps: pouring shotcrete(20) into an excavated bedrock(10); forming an inductive waterproof layer for inductively draining leachate through the shotcrete to a drainpipe; installing a drainage nonwoven fabric(30) and subsequently a complex-type waterproof material(40) on the top for forming the inductive waterproofing layer; pouring lining concrete(50) on the waterproof layer for forming a blockage waterproof layer which integrally adheres to the inductive waterproofing layer; and removing the release paper of the complex-type waterproof material in order to expose a spot-adhesive material(44) for pouring the lining concrete.

Description

Tunnel waterproofing construction method {A TUNNEL WATERPROOFING CONSTRUCTION METHOD}

The present invention relates to a tunnel, and more particularly to a waterproof construction method according to the waterproofing of the new tunnel and the existing tunnel repair.

Railroad tunnels, highway tunnels, underpass tunnels, and power facility tunnels are constructed through rocky areas in mountainous areas and deep underground areas to avoid road straightening or densely populated areas. In the tunnel, groundwater and surface water are flooded into the tunnel by incisions or cracks generated in the rock, and waterproof construction is necessary to block the inflow of such leachate.

Most of the waterproof construction of tunnels is conducted by induction waterproofing which induces leachate that is flooded by rock cutting or crack and discharges it out through the sump. However, many of the defects of the tunnel construction due to the subconstruction of the waterproof construction work.

The waterproof structure of the existing tunnel is made by placing a shotcrete after excavating the tunnel, fixing the drainage nonwoven fabric in which water is submerged on the upper surface of the poured shotcrete with Landel, and then using an opaque or translucent waterproof sheet ECL, The lining concrete layer is constructed after the waterproofing layer is applied by heat fusion method that applies high heat to the plastic sheet and sheets while attaching and connecting the ends of polymer synthetic resin sheets (hereinafter referred to as plastic sheets) such as EVA, HDPE, and PVC. It is made by pouring and finishing the tiles.

That is, the waterproof construction of the existing tunnel is the water of the sedimentation or surface water penetrated through the shotcrete is drained in the longitudinal direction by the nonwoven fabric or drainage pipe for drainage, the water drained in the longitudinal direction through the horizontal drain pipe connected to the longitudinal direction It is constructed by an induction waterproofing method that flows through a collecting pipe to a collecting well and drains it out.

The waterproofing materials widely used up to now are classified into coating waterproofing and sheet waterproofing. In the waterproofing of tunnel, the coating waterproofing is difficult to apply (use) because it cannot be constructed in the sealed condition of the excavated tunnel. Sheet waterproofing material has waterproof sheet made of asphalt, urethane, etc. However, sheet waterproofing material is suitable for waterproofing of flat concrete structure without unevenness of building structure of underground or ground, but in case of tunnel structure, Because the surface is not flat and the unevenness is severe, the sheet waterproofing material is damaged and it is difficult to use. Because of this problem, in the waterproof construction of tunnels, plastic sheets such as EBC, EVA, PVC, HDPE, etc., which are inevitably applied to the uneven surface of shotcrete, are tough, somewhat stiff and hard, are used as waterproofing materials.

ECB, EVA, HDPE, PVC sheet, which is a plastic sheet applied to waterproofing tunnels, should be extended by connecting and overlapping the sheet and one end of the sheet due to the construction properties of the sheet waterproofing material. However, even when a very good adhesive is used while connecting and bonding the plastic sheets, it is impossible to bond. The plastic sheet is a thermoplastic synthetic polymer sheet and is expanded by a thermal fusion method using the principle of melting at high heat. The thermal fusion method is a method of fusion bonding by applying hot air at a high temperature (600 ° C.) while connecting and bonding plastic sheets such as ECB, EVA, HDPE, and PVC.

However, the thermal fusion method has the following problems. In non-woven fabric for drainage, the nonwoven fabric for drainage is carbonized by high heat during heat fusion bonding construction where high temperature (600 ℃) is applied while joining and bonding the ends of plastic sheets such as EVB, EVA, HDPE, PVC in tunnel waterproof construction. There is a problem that the drainage function is reduced. The bigger problem is that when the plastic sheet of EVA, ECB, HDPE, PVC, etc. is connected and the heat is weak, the melting temperature is low and the fusion bonding is poor, or if the heat is excessive, the plastic of ECB, EVA, HDPE, PVC, etc. Holes are generated in the sheet, which causes flooding and leakage of the waterproof layer due to the poor connection between the sheet and the sheet, resulting in water defects in the lining concrete.

In particular, since the lining concrete layer and the waterproofing layer (layer made of plastic sheet) are not bonded together but are floating (separated), the leachate which is infiltrated and leaked by the insufficiency of the waterproofing layer due to the poor connection between the sheets and the waterproofing layer and the lining concrete If water leaks to weak areas such as cracks in lining concrete while moving between the spaces, it is very difficult to find and repair leaks.

In addition, in tunnel excavation where the construction environment is very poor, plastic sheets such as ECB, EVA, VLDPE, PVC, PE are heated to heat the shotcrete on the excavated inner surface, fix the non-woven fabric with randel and form a waterproof layer. The construction process of heat fusion while applying is very cumbersome, labor effort is high and construction time is long.

In the conventional tunnel waterproofing method, the shotcrete is poured by drilling or digging a tunnel, fixing a non-woven fabric for draining water, and placing plastic waterproof sheets such as ECB, EVA, HDPE, PVC on the surface of the non-woven fabric for high temperature hot air blower. It provides heat-induced structure by inducing heat fusion and attaching to form a waterproofing layer to induce leachate through the nonwoven fabric for drainage between shotcrete and waterproof layer by collecting the depth water or surface water immersed in the shotcrete and collecting it in the sump to discharge it out. Concrete is completed and the interior materials such as tiles are completed to complete the tunnel construction. The leaching water leaks into the lining concrete due to the poor construction of the joints of the plastic waterproof sheets, so it is urgently needed to improve the existing tunnel. This is a big problem of the induction waterproofing method implemented in the waterproofing method. There is an urgent need for improvement methods.

The present invention, with the induction drainage method for guiding the leachate immersed in the shotcrete out of the tunnel by the non-woven fabric for drainage between the shotcrete and the waterproofing layer, which is a conventional tunnel waterproofing method, the composite waterproofing material integrally attached to the lining concrete in front of the waterproof layer By constructing the barrier concrete to prevent the leakage of shotcrete into the lining concrete at the source, by applying two waterproof construction methods at the same time to the induction waterproofing method and the blocking waterproofing method in the tunnel waterproofing construction, the double tunnel waterproofing construction To provide a method.

In addition, in the conventional tunnel waterproof construction method, the nonwoven fabric for drainage is installed on the shotcrete, and then the ends of the plastic waterproof sheets such as EVA, ECB, HDPE, PVC, etc. must be heat-sealed with a high temperature hot air blower, which makes the construction work cumbersome and construction period. In the present invention, the waterproof construction work is very simple by attaching and attaching the plastic waterproof sheets at room temperature simply by the self-adhesive performance, rather than the heat fusion method of applying high temperature heat by the adhesive agent laminated on the plastic waterproof sheet. It is to provide a tunnel waterproof construction method that can be simple and shorten the construction period.

In addition, the tunnel waterproof construction method of the present invention implements an induction waterproofing method of induction drainage to the non-woven fabric for drainage between the shotcrete and the waterproofing layer, and the composite waterproof sheet is integrally bonded to the front of the concrete, such as external waterproofing of civil engineering and building structures By providing a water barrier to achieve the effect, it is to fundamentally block the leakage and leachate through the lining concrete to achieve a perfect double waterproof effect that is completely different from the conventional tunnel waterproof construction.

The problem to be solved by the present invention is not limited thereto, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to one aspect of the invention, the step of pouring shotcrete on the excavated rock; Forming an induction waterproofing layer for inductively draining the leachate through the shotcrete into a drain pipe; And placing lining concrete on the waterproof layer, wherein the lining concrete is integrally bonded with the induction waterproof layer to form a barrier waterproof layer for blocking leachate.

In addition, the forming of the induction waterproof layer may include installing a nonwoven fabric for drainage on the shotcrete; And installing a composite waterproofing material having a point adhesive material laminated on one surface of a plastic sheet on the drainage nonwoven fabric, wherein the plastic sheet of the composite waterproofing material faces the drainage nonwoven fabric. And the induction waterproof layer may be provided by the plastic sheet.

In addition, the forming of the blocking waterproof layer may include removing the release paper attached to the adhesive agent of the composite waterproofing material; And placing the lining concrete on the composite waterproof material to which the adhesive agent is exposed, and the barrier waterproof layer may be provided while the lining concrete is integrally bonded to the adhesive agent of the composite waterproof material as a whole.

According to one aspect of the invention, the step of pouring shotcrete on the excavated rock; Installing a drainage nonwoven fabric on the shotcrete, connecting end portions of the drainage nonwoven fabric to overlap each other and tableting the shotcrete with a tableting nail; Installing a waterproof layer by connecting the ends of the plastic sheets to overlap the nonwoven fabric for drainage; Removing the release paper attached to one side of the adhesive double sided tape and attaching the adhesive double sided tape to the waterproof layer; And placing lining concrete on the waterproof layer to which the adhesive double-sided tape is attached; The lining concrete pouring step is to remove the release paper attached to the other side of the adhesive double-sided tape and cast the lining concrete, the lining concrete adheres to the adhesive of the adhesive double-sided tape attached to the waterproof layer Thus, a tunnel waterproof construction method in which the waterproof section is partitioned may be provided.

In addition, the step of attaching the adhesive double-coated tape may be attached so that the end of the plastic sheet is superimposed on the top of the overlapped construction.

In addition, the step of installing the waterproof layer is a step of attaching while peeling off the release paper of the one side (one side) adhesive tape to the connection joint portion of the end of the plastic sheet is connected and constructed; And fixing the plastic sheet firmly by taking out the tableting nail into which the washer is inserted, and attaching the adhesive double-sided tape to the waterproof layer in the longitudinal direction of the tunnel. Alternatively, the adhesive adhesive double-sided tape may be attached at a predetermined interval in the transverse direction.

According to one aspect of the invention, after drilling and drilling the tunnel shotcrete to form a tunnel of the tunnel on the excavated rock, fixing the nonwoven fabric to the shotcrete with a nail nail, ECB, EVA, PVC A washer is inserted into the composite waterproofing material in which a polymer adhesive sheet is laminated on one surface of a polymer synthetic resin sheet (plastic waterproof sheet) such as HDPE so that the polymer synthetic resin sheet faces the nonwoven fabric for drainage and is fixed to the nonwoven fabric for drainage. The tackka nails are compressed into a tackka gun and fixed to the shotcrete to induce drainage for induction drainage.The lining concrete is poured in the state in which the adhesive agent laminated on one surface of the composite waterproofing material is exposed (reverse casting method). Tunnel including the step of waterproofing the waterproof construction so that the composite waterproofing material is integrally bonded to the front of the concrete integrally Waterproof construction methods can be provided.

According to an aspect of the present invention, unlike the conventional tunnel waterproof construction method, induced drainage to induce leachate leaked to the cracks and cracks of the shotcrete out of the tunnel by a drain sheet (non-woven fabric and composite waterproofing material for drainage) attached to the shotcrete In addition, the composite waterproofing material is integrally bonded to the lining concrete, and thus, the waterproofing is possible, thereby providing the double waterproofing effect of the induction drainage construction and the waterproofing construction.

According to one aspect of the invention. Leached water from the rock, etc. is induced by primary drainage and discharged out of the tunnel through the collecting pipe.Secondary waterproofing material is completely bonded to the lining concrete to prevent leakage of the lining concrete. In case of construction, if the outside surface of the lining concrete is damaged, water leakage and leaching of the lining concrete can be easily repaired. Therefore, it is easy to repair the leaking site unlike the conventional construction method for repairing the tunnel. Tunnel waterproof construction method can be provided.

In addition, the composite waterproof material is a composite waterproof sheet in which a point adhesive having adhesive properties is laminated on one side of a polymer synthetic resin sheet (plastic sheet) such as EVA, ECB, VLDPE, and HDPE. With the strong adhesive force, the joints of the ends of plastic sheets such as EVA, ECB, VLDPE, and HDPE can be simply and strongly bonded at room temperature without the need for heat fusion by applying high temperature hot air as in the conventional construction method. It can also be integrally bonded with concrete.

In addition, the adhesive material of the composite waterproofing material has gel type fluidity and adhesiveness, which shows the property of the film waterproofing agent, thereby showing the waterproof function of the plastic sheet and the waterproofing material of the adhesive film of the adhesive material. The waterproof function can be exhibited.

In addition, the polymer synthetic resin such as EVA, ECB, VLDPE, HDPE constituting the composite waterproofing material according to the present invention should be environmentally friendly, and the adhesive agent laminated on one side should also be environmentally friendly.

Tunnel waterproofing method according to the present invention comprises the steps of pouring shotcrete on the excavated rock; Attaching a nonwoven fabric for drainage in which water is submerged on top of the shotcrete; Attaching a surface of a plastic sheet of a composite waterproof material on the drainage nonwoven fabric; Construction is carried out by removing the release paper attached to the adhesive agent laminated on the attached composite waterproof material and pouring lining concrete.

Embodiments of the present invention, it is possible to fundamentally prevent the leakage of the lining concrete by inducing and draining and blocking the leachate due to rock cut or crack of the tunnel construction, it is easy to construction and can save construction time and construction labor,

In addition, embodiments of the present invention, by the non-woven fabric for drainage attached to the shotcrete and the plastic sheet of the composite waterproofing material can obtain the construction effect of the induction waterproofing primarily, and the adhesive layer of the composite waterproofing material is poured By integrally bonding the lining concrete with the front surface, it is possible to expect the effect of water-proof construction to block the leakage of water from the lining concrete.

1 is a schematic cross-sectional view of a tunnel waterproof structure for explaining the waterproof construction method of the tunnel according to the first embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view illustrating main parts of the tunnel waterproof structure shown in FIG. 1.
3A to 3E are diagrams showing the construction method of the waterproof structure shown in FIG. 2 step by step.
4 is an enlarged cross-sectional view of main parts of a waterproof structure according to a second exemplary embodiment of the present invention.
5A to 5E are diagrams showing the construction method of the waterproof structure shown in FIG. 4 step by step.
6 is a plan view showing a state where the adhesive double-coated tape is attached along the edge of the plastic sheet.
7 is a view showing a modification of the second embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to FIGS. 1 to 7. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art. Thus, the shape of the elements in the figures has been exaggerated to emphasize a clearer description. In the drawings, the same reference numerals are assigned to components that perform the same function.

The present invention induces a deep water and surface water inundated (leakage) in the shotcrete by obtaining a non-woven fabric for drainage between the shotcrete and lining concrete inside the tunnel and the waterproof layer of the composite waterproofing material to obtain an induction waterproofing layer draining out of the tunnel as a primary, The composite waterproofing material is integrally bonded to the lining concrete to obtain a barrier waterproof layer that blocks the leaching of the shot concrete from leaking to the lining concrete, thereby obtaining a perfect tunnel waterproofing effect that is completely different from the conventional tunnel waterproofing construction.

In the case of the general tunnel waterproofing, concrete is sprayed to form a tunnel on the excavated rock, eliminating the rough surface of the rock and forming a round circular skeleton of the tunnel, but the exterior of the shotcrete is still sprayed. Uneven and severe unevenness.

In tunnel waterproofing, the induction waterproofing method covers the entire surface of shotcrete with irregularities and covers the drainage nonwoven fabric as a whole to protect the waterproof sheet, while protecting the waterproof sheet while water is infiltrated through the shotcrete from the cut rock. It is a construction method in which water is collected in the sump through the drainage nonwoven fabric and guided to the outside of the tunnel by the performance of the drained nonwoven fabric and the waterproof layer.

 The blocking waterproof method is a construction method that prevents water from penetrating and leaking from the outside to the concrete structure by attaching the waterproofing material to the outside of the concrete structure such as the outer wall of the underground construction structure or the upper part of the roof. It is called blocking water-proof construction method to close the surface of the concrete structure and adhere it to the outer wall.

In the present invention, by providing a waterproof waterproof construction to completely adhere the composite waterproofing material to the lining concrete by the reverse pouring method using a composite waterproofing material in the tunnel waterproofing construction method provides a new blocking waterproofing method. Regarding the reinforcement method, the general waterproof construction of civil engineering and buildings is a general waterproof construction method that performs waterproof construction that prevents water from invading from the outside of the structure by bonding the waterproof material to the outer wall of the structure. When the exterior of the structure is narrow or it is difficult to perform waterproofing after the completion of the civil and building structures, the method of waterproofing the exterior walls by placing the concrete on the waterproofing layer after forming the waterproofing layer is called the reverse casting waterproofing method.

As mentioned above, the tunnel is waterproofed in parallel with the induction drainage construction method and the two types of waterproof construction methods in the waterproof and waterproof construction method. It can be usefully applied to the overall repair of existing tunnels and the waterproof construction accordingly, and the excellent effect of waterproof construction of the tunnel is obtained.

Tunnel waterproof construction method according to another aspect of the present invention is a double-sided adhesive tape laminated with a point adhesive material exhibiting strong adhesiveness on both sides with a polymer synthetic resin sheet (plastic sheet) such as ECB, EVA, PVC, HDPE Provide a tunnel waterproof construction method using.

(Example)

1 is a schematic cross-sectional view of a tunnel waterproof structure for explaining the waterproof construction method of the tunnel according to the first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view illustrating main parts of the tunnel waterproof structure shown in FIG. 1.

1 and 2, the waterproof structure by the waterproof construction of the tunnel according to the present invention is shotcrete 20, drainage nonwoven fabric 30, composite waterproofing material 40 and lining concrete from the surface of the rock 10 50). The composite waterproofing material 40 is a adhesive paper 44 is laminated on the surface of the plastic sheet 42, which is a polymer synthetic resin such as ECB, EVA, HDPE, PVC, etc., and a release paper 46 for protecting the adhesive material 44 thereon. ) Is attached and the release paper is removed during installation.

3A to 3E are diagrams showing the construction method of the waterproof structure shown in FIG. 2 step by step.

Construction method of the waterproof structure is a shotcrete pouring step, forming an induction waterproof layer; And forming a barrier waterproof layer.

3a to 3e, the shotcrete 20 is cast so as to have a tunnel shape (round shape) on the surface of the excavated rock 10 (FIG. 3A). The drainage nonwoven fabric 30 is expanded and constructed so that the ends of the drainage nonwoven fabric overlap on the shotcrete (FIG. 3B). A tableting nail 90 is used to attach the drainage nonwoven fabric. The tableting nail 90 may include a packing material 92 such as a washer. The head of the tableting nail 90 is preferably used as low and flat as possible so as not to damage the composite waterproofing material 40 installed on the drainage nonwoven fabric.

The composite waterproofing material 40 is expanded and constructed so that the ends of the composite waterproofing material 40 overlap on the drainage nonwoven fabric (FIG. 3C). The overlapping portion of the composite waterproofing material 40 is bonded to the plastic sheet (EVB, EVA, PVC, HDPE, etc.) to be superposed on the adhesive agent 44. The fixing nail 90 may be used to fix the composite waterproof member 40 that is expanded in this way. That is, the composite waterproofing material 40 has a tableting nail 90 in which the washer 92 is inserted into the adhesively connected portion overlapping each other, and tableting the tableting nail 90 so that the tableting nail 90 is taken out of the shotcrete 20. Fix it. Tableting nail (90) is a composite waterproofing material (40) is overlapped with a width of 8cm-10cm and put at intervals of 30cm -50cm to the upper part attached, depending on the state so as not to sag even in the middle of the composite waterproofing material (40) It is preferable to drive the tableting nail 90 at regular intervals.

In the present invention, when looking at the process of constructing the composite waterproofing material 40 on the drainage nonwoven fabric 30 in more detail, the connection portion (overlapping) while overlapping and bonding the ends of the composite waterproofing material 40 8cm ~ 10cm Removing the release paper 46 attached to the surface of the losing portion) and expand the construction while connecting and bonding the composite waterproofing material (40). The tableting nail 90 into which the washer 92 is inserted is compressed into a portion to be connected and fixed to the shotcrete 20. In this way, when the construction of the composite waterproofing material 40 is completed, the induction waterproofing layer capable of firstly inducing deep water or surface water leaching from the shotcrete to be collected in a sump well (2; shown in FIG. 1) and then discharged out of the tunnel. do.

That is, the induction waterproof layer is provided by the combination of the plastic sheet 42 of the nonwoven fabric 30 and the composite waterproof material 40 for drainage. If the nonwoven fabric for drainage is attached to the wall of shotcrete and the plastic sheet of EVA, ECB, HDPE, PVC, etc., which is one side of the composite waterproofing material, is fixed to the wall of the shotcrete with a tableting nail, the composite waterproofing material ( An induction waterproof layer is provided between the walls 40 and the walls of the shotcrete 20 to induce leachate.

Before pouring the lining concrete 50, the release paper 46 attached to the adhesive surface 44 of the composite waterproofing material 40 is removed (FIG. 3D). When the lining concrete 50 is poured in the state where the adhesive agent 44 of the composite waterproof material 40 is exposed (FIG. 3E), the lining concrete 50 is integrally formed on the adhesive agent 44 of the composite waterproof material 40. It is bonded to the front, providing a barrier waterproof layer.

As such, the tunnel waterproof construction method of the present invention can achieve a perfect waterproof construction effect by the induction waterproofing and blocking waterproofing at once.

In the above embodiment, the installation of the shotcrete 20 in the excavated rock 10 is to stabilize the excavation surface of the foundation tunnel to be circular and to smooth the base surface to be waterproof, the surface of the shotcrete 20 This very rough and uneven (凹凸) is so severe that when the non-woven fabric for drainage 30 and the composite waterproofing material 40 is attached to the protruding surface of the shotcrete 20, when the damage of the waterproof layer is concerned, the reinforcing non-woven fabric (top) Construction may be added.

In the present invention, the inventors test the physical properties of the composite waterproof material for waterproof construction of the tunnel, ECB, EVA, HDPE, PVC, plastic sheet, such as tensile strength of 10 N / ㎜ or more, tearing performance of 30 N or more, The elongation rate is preferably at least 250%, and the surface of the adhesive agent is bonded to the plastic sheet and the sheet, and when the Peel-Out test, which is the adhesion performance test, shows the adhesion performance of 1.5 N / mm or more, ECB When bonding sheets and sheets of EVA, HDPE, PVC, etc., the sheets and sheets are integrally and strongly adhered to each other. In addition, only when the adhesive material exhibits an adhesive strength of 1.5 N / mm or more, the adhesive material and the lining concrete of the composite waterproofing material are strongly bonded as one-piece, thereby exhibiting the blocking waterproof function of the present invention. Therefore, the composite waterproof material for waterproofing the tunnel of the present invention preferably secures the physical properties because the preferred tunnel waterproofing is achieved only when the various waterproof properties are secured.

On the other hand, the inventor overlaps the drainage non-woven fabric and the composite waterproofing material on the shotcrete firmly attached to the tableting nail with a washer inserted, and when the water is inundated or leaked by the tableting nail drilled through the drainage nonwoven fabric and waterproof layer on the shotcrete There is a risk of water leakage on the lining concrete, so we put a tableting nail with a washer inserted into the waterproof sheet and tested it to see if it is a pitcher. Confirmed.

In the test of hydrostatic pressure, 1 N is equal to not permeable at the pressure when a water pressure of 10 meters is applied. Therefore, in the present invention, a compression gun (with a nonwoven fabric attached to the shotcrete and the composite waterproofing material of the present invention superposed) It was found that there is no damage to the waterproofing performance due to the tableting nail even if the tableting nail embedded with the washer was fastened at high speed and then drilled and fixed through the composite waterproofing material.

In addition, the adhesive layer laminated on one side of the plastic sheet of the composite waterproof material EVA, ECB, HDPE, PVC, etc. of the present invention may be made of a rubber, thermoplastic resin or rubber, acrylic, etc., but only adhesive (adhesive) It is preferable that performance exhibits 1.5N or more. According to one embodiment, the adhesive of the composite waterproofing material is mixed with a rubber and a tackifier in a heated liquid stirrer in a heated solvent oil, and at least one of a thermal stabilizer, an antioxidant, a reinforcing agent and a filler is added to the mixture Can be prepared. The adhesive agent thus prepared may be applied to one surface of the plastic sheet while heated to a constant temperature. It is preferable that the weight of the oil in preparing the adhesive is greater than the weight of the rubber.

<Of the present invention Example  2>

4 is an enlarged cross-sectional view of main parts of the waterproof structure according to the second exemplary embodiment of the present invention, and FIGS. 5A to 5E are views showing the construction method of the waterproof structure shown in FIG. 4 step by step.

The waterproof structure shown in FIG. 4 is a waterproof construction using an adhesive double-sided tape 70, wherein the space between the waterproof layer provided by the plastic sheets 60 and the lining concrete 50 is partitioned by the adhesive agent. Is provided.

5A to 5E, the construction method of the waterproof structure using the adhesive double-sided tape 70 may include a shotcrete placing step, a waterproof layer forming step, an adhesive double-sided tape attaching step, and a lining concrete pouring step.

5a to 5e, the shotcrete 20 is poured into the shape (circle) of the tunnel on the surface of the excavated rock 10 (Fig. 5a). The drainage nonwoven fabric 30 is expanded and constructed so that the ends of the drainage nonwoven fabric 30 overlap on the shotcrete (FIG. 5B). A tableting nail 90 is used to attach the drainage nonwoven fabric 30.

The waterproofing layer forming step is provided by expanding the plastic sheet 60 such as ECB, EVA, HDPE, PVC, and the like so that the ends of the plastic sheet 60 overlap 10 cm on the nonwoven fabric 30 for drainage (FIG. 5C). A tableting nail 90 may be used to attach the plastic sheet 60.

Adhesive adhesive double-sided tape attaching step is to remove the release paper attached to one side of the adhesive double-sided tape 70, and then attached so that the ends of the plastic sheet 60 is overlapped and added to the top of the construction (Fig. 5d). Although not shown, the plastic sheet 60 to which the adhesive double-sided tape 70 is attached may be firmly fixed to the tableting nail into which the washer is inserted once again on the adhesive double-sided tape 70.

The lining concrete pouring step removes the release paper attached to the other side of the adhesive adhesive double-sided tape 70 and pours the lining concrete 50 so that the lining concrete 50 is attached along the end of the plastic sheet 60. By bonding to the adhesive agent 74 of the adhesive double-sided tape 70, the waterproof section is separated (FIG. 5E).

6 is a plan view showing a state where the adhesive double-sided tape 70 is attached along the edge of the plastic sheet. As shown in Figure 6, the adhesive double-sided tape 70 is attached in a rectangular shape along the edge of the plastic sheet (60).

In the present invention, the adhesive adhesive double-sided tape 70 is manufactured in the form of a tape by cutting the sheet prepared by laminating the adhesive adhesive 74 layer on both sides of the plastic sheet 72 such as a sandwich in a width of 10 cm to 15 cm. As a matter of course, the adhesive double-sided tape 70 has the same physical properties as the composite waterproofing material of the first embodiment.

The effect of the construction method of the second embodiment, while attaching the non-woven fabric 30 for drainage on top of the shotcrete 20 while attaching the plastic sheet 60, such as EBC, EVA, HDPE, PVC on the upper part while the tunnel waterproofing Waterproofing by induction drainage by forming a waterproof layer is the same as the existing tunnel construction method, but the deep layer and surface water leaching from the shotcrete 20 due to the damage of the waterproof layer in the conventional tunnel construction method When the defects inundated and leaked into the lining concrete (50) through the interface between the waterproof layer and the lining concrete (50) is separated, the inundation and leakage due to the water inundated and leaked to the separated interface It is difficult to find that repair is very difficult, the present invention is the construction section (plain) adhesive adhesive double-sided tape 70 is integrally bonded with the lining concrete (50) By providing each overlapping portion) of the waterproof layer composed of a sheet, so when a maintenance interval compartment defects occurred for maintenance and defect arises because the water compartment separating the waterproof construction interval maintenance construction is very convenient and effective construction is perfect.

 In addition, the tunnel waterproof construction method using the adhesive adhesive double-sided tape 70, high temperature while connecting and bonding the end portion (width 10cm) of the waterproof sheet, such as ECB, EVA, PVC, HDPE, as in the conventional tunnel waterproof construction method Excludes the construction method of heat fusion by applying the heat of the adhesive, by the adhesive strength of the adhesive double-sided tape 70 is easily adhered to the upper end of the overlapping and connecting the ends of the plastic sheet 60 to the plastic sheet 60 and the sheet The opposite side of the adhesive adhesive double-sided tape 70 is integrally bonded to the lining concrete 50 to separate the waterproof construction section so that the construction of the tunnel is easy and the effect is perfect. The repairing process is simple and easy to repair because the partition space, which is a waterproof construction section, is submerged when the deep concrete and surface water of the shotcrete 20 are flooded with the lining concrete 50. It is perfect.

7 is a view showing a modification of the second embodiment of the present invention.

Referring to FIG. 7, after the shotcrete is chopped to be circular in the shape of a tunnel on the excavated rock surface, the end and ends of the drainage nonwoven fabric which is submerged on the upper portion are extended and attached. And connect the joint sheet so that the plastic sheet 60, such as ECB, EVA, HDPE, PVC, and one end of the sheet overlap the upper portion of the nonwoven fabric for drainage. The plastic sheet 60 and one end of the sheet are overlapped and connected to each other, while the release sheet of the one side (one side) adhesive tape 80 is peeled off and attached. One side adhesive tape 80 is attached to the top of the tableting nail (90) with the washer is firmly fixed to the outside. The drainage nonwoven fabric and the plastic sheet are peeled off and attached to one side of the adhesive adhesive double-sided tape 70 in the longitudinal direction at regular intervals to the waterproof layer firmly fixed by the tableting nail. And finally, before placing the lining concrete, after removing the release paper attached to the other side of the adhesive double-sided tape 70, the lining concrete is poured.

The construction method according to the modification of the second embodiment, when attaching the nonwoven fabric for drainage on the shotcrete while waterproofing the tunnel, and connecting and attaching plastic sheets such as EBC, EVA, HDPE, PVC, etc. of the plastic sheet 60 If the joint is not uniformly attached and irregularly attached in the longitudinal direction of the tunnel, the construction section is also irregularly formed, and in case of concern that the section is formed incorrectly, the connection is made with a 10 cm width of the plastic sheet 60. After detaching and attaching the release paper of one side (one side) adhesive tape 80 of width 10cm-15cm on the upper part to be bonded, completely bonding and sealing the connection joint of the plastic sheets 60, and then sealing the width 10 While removing the release paper attached to one side of the adhesive adhesive double-sided tape 70 of cm, it is attached to the surface of the plastic sheet 60 in the longitudinal direction. The adhesive double-sided tape 70 is attached in the longitudinal direction of the tunnel at intervals of 1M to 1.5M. The adhesive double-sided tape 70 may be attached in the transverse direction as well as the longitudinal direction of the tunnel, depending on the construction site conditions. When the release paper on the opposite side of the adhesive adhesive double-sided tape 70 is removed and the lining concrete is poured, a partition waterproof construction section separating the tunnel section may be formed. One side (single side) adhesive tape can be cut | disconnected longitudinally the composite waterproofing material of this invention in width 10cm-15cm.

In the above, the waterproof construction method of the tunnel according to the present invention has been shown in accordance with the above description and drawings, but this is merely an example, and various changes and modifications are possible without departing from the technical spirit of the present invention. .

10: rock 20: shockcrete
30: non-woven fabric for drainage 40: composite waterproof material
50: lining concrete

Claims (9)

In the tunnel waterproofing method:
Placing shotcrete on the excavated rock;
Forming an induction waterproofing layer for inductively draining the leachate through the shotcrete into a drain pipe; And
Placing lining concrete on the waterproof layer, wherein the lining concrete is integrally bonded with the induction waterproof layer to form a barrier waterproof layer for blocking the leachate, characterized in that it comprises a step of forming a waterproof waterproof. The method of claim 1,
Forming the induction waterproof layer is
Installing a nonwoven fabric for drainage on the shotcrete; And
Installing a composite waterproofing material laminated on one surface of the plastic sheet on the drainage nonwoven fabric, the plastic sheet of the composite waterproofing material to face the drainage nonwoven fabric, including the non-woven fabric for drainage Tunnel waterproof construction method characterized in that the induction waterproof layer is provided by the plastic sheet. The method of claim 2,
Forming the blocking waterproof layer is
Removing the release paper attached to the adhesive agent of the composite waterproofing material; And
Including the step of pouring the lining concrete on the composite waterproofing material exposed to the adhesive agent, characterized in that the barrier waterproof layer is provided while the lining concrete is integrally bonded to the adhesive material of the composite waterproofing material as a whole. Tunnel waterproof construction method. In the tunnel waterproofing method:
Placing shotcrete on the excavated rock;
Installing a nonwoven fabric for drainage on the shotcrete;
Installing a composite waterproofing material laminated on one surface of the plastic sheet on the drainage nonwoven fabric; Installing the plastic sheet of the composite waterproofing material toward the drainage nonwoven fabric; And
Placing lining concrete on the composite waterproofing material;
Installing the composite waterproofing material
The end of the composite waterproofing material is connected so that the overlap, and the overlapping portion of the composite waterproofing material is a tunnel waterproof construction method characterized in that the interconnected adhesive bonding to the adhesive material of the composite waterproofing material with adhesive force. The method of claim 4, wherein
The composite waterproof material is a tunnel waterproofing method, characterized in that the tableting is compressed to the shotcrete by a tableting nail. The method of claim 4, wherein
The lining concrete pouring step
And removing the release paper attached to the adhesive adhesive of the composite waterproofing material, and pouring the lining concrete, wherein the lining concrete is integrally front bonded to the adhesive of the composite waterproofing material. In the tunnel waterproofing method:
Placing shotcrete on the excavated rock;
Installing a drainage nonwoven fabric on the shotcrete, connecting end portions of the drainage nonwoven fabric to overlap each other and tableting the shotcrete with a tableting nail;
Installing a waterproof layer by connecting the ends of the plastic sheets to overlap the nonwoven fabric for drainage;
Removing the release paper attached to one side of the adhesive double sided tape and attaching the adhesive double sided tape to the waterproof layer; And
Pouring lining concrete on the waterproof layer to which the adhesive double-sided tape is attached;
The lining concrete pouring step
Remove the release paper attached to the other side of the adhesive double-coated tape and cast the lining concrete, the lining concrete is bonded to the adhesive of the adhesive double-coated tape attached to the waterproof layer is partitioned waterproof section Tunnel waterproof construction method characterized in that. The method of claim 7, wherein
Attaching the adhesive double-sided tape is
Tunnel waterproof construction method characterized in that the end portion of the plastic sheet is attached so as to be added to the overlapped construction. The method of claim 7, wherein
Installing the waterproof layer is
Peeling off and attaching a release sheet of one side (one side) adhesive tape to the connection joint portion at which the ends of the plastic sheet are overlapped and connected;
And fixing the plastic sheet firmly by taking out the tableting nail into which the washer is inserted into the upper surface to which the one-side adhesive tape is attached.
Attaching the adhesive double-sided tape is
Tunnel waterproof construction method characterized in that for attaching the adhesive double-sided tape at regular intervals in the longitudinal or transverse direction of the tunnel to the waterproof layer.

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