JP2011231531A - Flow end treatment unit with side ditch having grating for surface headrace construction method in tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit that prevents clogging and drainage failure induced from a free lime or a solid at flow end treatment when a surface headrace is constructed as a countermeasure against water leakage in a tunnel.SOLUTION: In a flow end treatment unit of the present invention for a surface headrace construction method, a surface headrace panel made of aluminum laminated composite board is installed on an inner wall of a tunnel with gaps provided between the back face of the surface headrace panel and the inner wall surface of the tunnel and between the lower edge of the panel and the upper face of a drain side ditch. The leakage water that flows down on the back face of the surface headrace panel and drains from the lower edge of the panel flows down through a grating directly to the drain side ditch having a large cross section for the drain covered with the grating and drains from the side ditch. As a cover material of the drain side ditch in the flow end treatment unit, for the drain side ditch installed directly below the surface headrace panel installed on the inner wall of a tunnel, a grating plated with zinc as rust-proofing is used for covering the side ditch and a supporting steel member is welded on the side wall of the tunnel to horizontally hold the grating.

Description

  [Technical Field] The present invention relates to a sewage treatment method comprising a tunnel leakage prevention plate applied to a surface water conveyance method among existing leakage measures for an existing tunnel and a drainage side groove covered with a grating.

  Conventionally, the surface water transfer method for existing tunnels is a tunnel that forms a wall that is floated away from the inner wall of the tunnel in order to prevent vehicle traffic and pedestrians in the tunnel from dropping due to dripping of water into the tunnel or freezing of the water leak. A water leakage prevention plate is installed. Such conventional tunnel leakage prevention plates are already known as shown in Patent Document 1 and Patent Document 2. The water leakage prevention plate described in Patent Document 1 was installed in a stretched manner by forming a single heat insulation layer between a heat insulation plate made of foamed polyethylene or the like installed on a tunnel inner wall via a waterproof sheet, and the heat insulation plate. A surface layer plate is provided. In patent document 2, it is set as the panel formed so that a heat insulating material might be pinched | interposed into metal plates, such as aluminum.

  However, in both of these documents, there is no special description about the end-of-water treatment method. Like the conventional surface water-conveying method, it is embedded using the side wall etc. It is installed over a narrow drainage ditch and drained by these.

Japanese Patent Laid-Open No. 11-182196 Japanese Examined Patent Publication No. 4-60199

  In the conventional end-of-flow treatment method, when embedding a square gutter or the like below the sidewalk surface, the work width and depth are limited depending on the size of the sidewalk and the size of the drainage cross section is limited. In addition, depending on the shape and scale of the square culm, the flow rate of draining spring water becomes slow, and solid matter such as free lime contained in the spring water tends to accumulate. In consideration of the work of embedding for embedding, a square cross-section with a small cross section is used. In addition, when draining in a narrow drainage ditch, if the spring water is intense and the amount of water leakage is large, the drainage does not catch up and overflows from the drainage ditch, and the drainage often flows not only to the sidewalk but also to the roadway. On the other hand, if the width of the drainage gutter is increased, the risk of falling of pedestrians and bicycles increases, resulting in traffic obstruction and lack of safety.

  If the amount of spring water in the tunnel is abundant at each location, the free lime contained in the spring water will often flow out along with the drainage, with less solid settling. However, the amount of spring water is greatly affected by weather conditions such as rainy weather, the change in spring water volume is large, and when the spring water volume is small, solids such as free lime are likely to adhere to the back of the surface water guide panel and accumulate over time. The volume will increase and the drainage cross section will be narrowed. The solid matter deposited and deposited is pushed away by the spring water and discharged when the amount of spring water increases.

  If the solid matter discharged from the sewage treatment section does not flow smoothly, the back of the surface water guide panel fills up and the head difference increases due to the retention of spring water, etc., and the load increases, causing the surface water guide panel to swell and endure. An abnormal situation such as peeling off the part that cannot be removed occurs, leading to destruction. Further, since the horizontal joint portion of the construction joint is reversely wound, the post-cast concrete is likely to be insufficiently filled, and the gap is likely to increase in some places. For this reason, depending on the geological conditions on the backside of the lining concrete, the surrounding earth and sand are often pulled together with the spring water. As a result, the solids in the spring water increase rapidly, and the balance with the amount of drainage is lost, and the surface water conduction panel is likely to be deformed.

  Deposits due to adhesion can be removed by periodically cleaning the back surface of the surface water guide panel, but the embedded type such as a square gutter must be cleaned from the gap at the top of the panel or after the panel is disassembled. If there are power line cables, lighting equipment, etc., work from the top becomes difficult because these equipment become obstacles. In addition, when a large amount of the solid matter is discharged, it becomes a temporary blockage, causing a flow failure, accumulating in the square horn, and the discharge is partially deteriorated. In the case of a small cross-sectional drainage ditch, in order to prevent water leakage from splashing on the sidewalk surface, etc., it is often installed with the lower end of the panel near the bottom of the drainage ditch. Therefore, when a large amount of earth and sand is discharged, it often accumulates in the place and overflows on the sidewalk due to poor fluidity of the earth and sand and insufficient drainage cross section. For this reason, the deposits not only obstruct pedestrians and bicycles, but also leak water overflowing the sidewalks and roads, impeding traffic. Although cleaning of the small cross-section side groove is easy, the back of the panel is a work from the top of the panel, and when there are obstacles as described above, the work becomes defective and there is a problem in the cleaning method.

  In order to solve these problems, the present invention provides equipment for preventing clogging and drainage due to free lime and solids at the end of the water treatment plant when constructing the surface water transfer method as a countermeasure against water leakage into the tunnel. To do.

  The flow-end treatment equipment of the present invention tunnels a surface water guide panel made of an aluminum laminated composite plate by providing a space between the back surface of the surface water guide panel and the inner wall surface of the tunnel and between the lower end of the panel and the upper surface of the drainage side groove. In the surface water transfer method installed on the inner wall, the water leaked from the back of the surface water transfer panel and discharged from the lower end of the panel is allowed to flow directly from the grating lattice gap into the drainage side groove with a large drainage cross section covered with the grating. It is characterized by draining from the side groove.

  And the drainage gutter lining in the above-mentioned sewage treatment equipment is a drainage gutter installed just below the surface water guide panel installed on the inner wall of the tunnel. It is characterized in that the steel material for supporting is welded and fixed to the side wall of the tunnel and the grating is held horizontally.

  In the present invention, the surface treatment equipment for the surface water conduction panel is a drainage groove having a large drainage cross section, and the drainage is drained to the catchment in the form of a side groove. The size of the drainage cross section of the drainage side groove is as large as 10 cm deep or more and 15 cm wide. The gap between the bottom of the surface water guide panel and the upper surface of the grating is about 5 cm, and the upper part of the drainage side groove is covered with grating and covered. Then, water leaks from the lattice gap of the grating, and the surface water guide panel is made of an aluminum laminated composite plate with high cross-sectional rigidity.

  In the drainage side ditch, the support part on one side of the grating is the side wall of the tunnel, and the concrete that becomes the support part is scraped off, so there is no catch jaw part and the grating is tilted. In order to ensure safety, a steel material is welded to the side wall of the tunnel as a supporting material, and the grating is galvanized for rust prevention.

  In the present invention, since the drainage cross section of the drainage side groove is large, and an appropriate interval is provided between the lower end of the surface water guide panel and the upper surface of the grating, solids such as free lime and poorly flowable earth and sand are present. Even if a considerable amount is discharged, it is very unlikely to accumulate and block in the drainage channel, and the leaked spring water is led to the drainage basin without overflowing the sidewalk or road surface.

  Since the upper part of the drainage ditch is covered with grating, even if spring water increased due to weather conditions leaks and suddenly flows into the drainage ditch, it can be prevented from splashing back due to scattering, such as road surface The impact on is very small. In addition, since grating is safe even if a pedestrian or bicycle rides, it does not hinder traffic.

  Even when solid matter accumulates in the drain side groove, visual confirmation is easy from the lattice gap of the grating, and the cleaning operation can be quickly performed by removing the grating. Also, if there is an obstacle at the top, the rear of the panel must be moved by moving the obstacle or dismantling the panel, but there is a gap between the lower part of the panel and the grating, so that work space More work can be done. In addition, if the grating is removed and the gap between the drainage side groove and the bottom of the surface water guide panel is widened, the cleaning work becomes easier, and even if deposits accumulate on the back of the panel, it can be removed easily, and the drainage section can be quickly restored. Is done.

1 is a cross-sectional view of a sidewalk portion showing an embodiment of a sewage treatment work by a drain side gutter subjected to a grating lining according to the present invention. It is sectional drawing of the pedestrian road boundary block channel | path part which shows embodiment of the flow-end processing work by the drainage side groove | channel which carried out the grating lining.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a sewage treatment facility using a drainage gutter covered with a grating in the tunnel surface water conveyance method according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view showing the construction of a surface water conveyance method for a sidewalk portion 7, and B is an enlarged cross-sectional view in the vicinity of a drain side groove 3. The road tunnel lining concrete is divided into an upper half-section arch part concrete lining 4 and a lower half-section side wall concrete lining 5. The construction joint is the horizontal joint 6, which is a cause of leakage of spring water, and is a main part as a countermeasure against water leakage.

In order to introduce the water leakage mainly composed of this portion to the existing drainage channel, the surface water guide panel 1 is installed in the concrete linings 4 and 5 so as to cover the horizontal joint 6. Leakage drained from the lower end of the surface water guide panel 1 flows down through the grid of the grating 2 into the drain side groove 3. The leaked water that has flowed through the drainage side ditch 3 flows in the drainage trough to drainage side ditch connecting drainage ditch 9 and is led to the drainage trough 8, poured into the existing drainage channel 10, and discharged outside the tunnel mine.

  C of FIG. 2 is a cross section of the surface water guide construction method of the walking road boundary block passage 17 portion without a sidewalk, and D is a plan view of the drainage side groove 18 and the water distribution pipe 14 on the walking road boundary block passage 17 side. A communication cable fireproof protective case 19 exists immediately above the surface water guide panel 1. The surface water guide panel 1 is installed in the concrete linings 4 and 5 so as to cover the horizontal joint 6. The water leaked from the lower end of the surface water guide panel 1 flows down to the drain side groove 18 through the grating 2. The water leaked into the drainage side groove 18 is introduced into the existing waterway 16 below the road surface 11 through the grating 15 by the drainage pipe 14 embedded in the walking road boundary block 17 and discharged outside the tunnel mine.

  The drainage side grooves 3 and 18 have a tunnel side wall concrete surface on one side of the cross section, and when the drainage side grooves 3 and 18 are installed in a flow untreated construction, the entire side without leaving the triangular part 20 on the side wall concrete lining 5 side is left. Begin to beat. Thus, the water leakage flowing down the back surface of the surface water guide panel 1 is smoothly guided to the drainage side grooves 3 and 18 through the side wall concrete lining 5.

  The grating 2 covering the upper part of the drainage side grooves 3 and 18 secures a pedestrian and the like by welding and fixing the support steel material 12 to the side wall portion concrete lining 5 side portion so as to keep the level. The grating 2 and the supporting steel material 12 are galvanized to take rust prevention measures.

  When the support steel material 12 is used by welding and fixing an equilateral mountain-shaped steel L-30 mm × 30 mm × 3 mm × predetermined length, the load is dispersed and a stable support force is obtained. Moreover, the protrusion width which becomes resistance of running water becomes 21.2 mm by arranging in a staggered manner in a mountain-like shape, and the influence can be reduced.

  The drainage side grooves 3 and 18 covered by the grating 2 have a drainage cross section of 15 cm / width x depth of 10 cm or more to ensure a drainage capacity of 15 L / m or more and continuously cover the opening. It is not a hindrance to pedestrians or bicycles and is highly safe. Moreover, if the solidified material has settled and accumulated in the drain side grooves 3 and 18, it can be visually confirmed, and the cleaning and discharging operation can be easily and quickly handled by removing the grating.

  When free lime or the like adheres to the back surface of the surface water conveyance panel 1 and the water conveyance capacity is reduced, cleaning work is performed. If there is a facility (such as a communication cable fireproof protective case 19) that obstructs the cleaning at the top of the surface water guide panel 1, the cleaning work starts from the bottom of the panel. A working space of 15 cm or more can be secured by adding a depth of 10 cm to the side grooves 3 and 18 and an interval width of about 5 cm between the lower end portion of the surface water guiding panel 1 and the grating 2, thereby facilitating the use of the cleaning tool.

  Usually, products made of hard vinyl chloride (a flame retardant) material are frequently used for surface water-conducting panels. Although this material is low in material cost and durable and economical, it is often reinforced with an aluminum corner angle or the like because the rigidity is small if the cross section is small when the end is opened. When used on a sidewalk, there is a high possibility that the reinforcing material will drop and deform due to contact with a bicycle, etc. In the present invention, an aluminum laminated composite plate (non-combustible material) with high cross-sectional rigidity is used to secure a permanent cross-section. And increase impact resistance to improve durability.

1. Surface water transfer panel 2. 2. Grating for drainage side groove Drainage gutter 4. 4. Upper half section arch concrete lining 5. Lower half-section side wall concrete lining 6. 6. Horizontal joint 7 Step road surface8. Catchment 9 Drainage basin to drainage side groove connection drainage groove 10. Existing drainage channel (sidewalk side)
11. Road surface 12. 14. Grating support steel for drainage side grooves Drainage side groove bottom mortar 14. Pedestrian road boundary block passage side drain pipe 15. Grating for the existing drainage channel on the side of the walkway boundary block passageway 16. 16. Existing waterway on the side of the walkway boundary block passageway Walkway boundary block 18. 18. Drainage side groove on the pedestrian boundary block passage 20. Communication cable fireproof protective case Drainage side groove side wall concrete part triangle shape part

Claims (4)

  In the surface water-conducting method in which a surface water-conducting panel made of an aluminum laminated composite plate is installed on the inner wall of the tunnel by providing a space between the back surface of the surface water-conducting panel and the inner wall surface of the tunnel, and between the lower end of the panel and the upper surface of the drainage side groove, Leakage that flows down the back of the surface water-conducting panel and is discharged from the lower end of the panel flows directly from the grating lattice gap into the drainage side groove with a large drainage cross section covered with the grating, and drains through the drainage side groove. Surface treatment equipment for surface water transfer method.   The sewage treatment facility according to claim 1, wherein the distance between the lower end of the panel and the upper surface of the drainage side groove is about 5 cm.   3. The sewage treatment facility according to claim 1, wherein the groove section has a depth of 10 cm or more and a width of 15 centimeters or more.   In the drainage side ditch installed just below the surface water guide panel installed on the inner wall of the tunnel, the galvanized grating is used for the side ditch lining as a rust prevention treatment, and the supporting steel is welded and fixed to the side wall of the tunnel. The lining material for the drainage side groove in the sewage treatment facility according to any one of claims 1 to 3, wherein the grating is held horizontally.

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