JPS6143520B2 - - Google Patents

Description

[Detailed description of the invention] Cracks occur in the joints of concrete linings for tunnels, underground passages, etc. due to shrinkage as the concrete hardens or due to displacement of the tunnels, underground passages, etc. due to earth pressure over time. death,
Water often leaks from the joint due to gaps.

The following construction methods are currently being used to direct water leakage from construction joints in tunnels, underground passages, etc.

In other words, 1. A water guide gutter is attached to the inner surface of the concrete lining of the channel with bolts, and the water is guided from the arch to the side wall and then to the lower gutter. 2. A groove is prepared in advance at the construction joint, and the water guide gutter is fitted into this groove. included,
Methods include caulking and directing water leakage to the gutter, or cutting the wall surface of the three leakage points into a groove shape, burying the groove-shaped gutter or pipe with concrete, mortar, etc., and directing water from the arch to the lower part of the side wall. has been done. Among these construction methods, in cases where it is a problem for the gutter body to be exposed or protruding within the internal cross-section of the tunnel, there are methods in which a groove is made in advance on the inner surface of the lining and the water guide gutter is fitted in, or buried, as the passageway ages. A gap may develop between the water guide gutter and the groove wall due to shrinkage and hardening of the caulking material mentioned above, weakening of the elasticity of the water guide gutter, displacement of the construction joint due to the deformation pressure applied to the lining concrete, or shrinkage due to hardening of the lining concrete itself over time. Water may leak from this gap.

In the present invention, a band-shaped weather-resistant buffering elastic body is fixed to the upper side of an elastic water guide gutter, and this water guide gutter is fitted into a water guide groove, and the water guide gutter is constantly guided by a leaf spring body provided at intervals. The upper tip of the gutter is pressed outward with a preload, and the elasticity of the water guide gutter itself, which is an elastic body, makes it stick to the wall of the groove, so that even if the joint changes, the outer part of the water guide gutter and the wall of the groove The preload of the leaf spring ensures a tight fit to prevent water leakage.

Next, the present invention will be described in detail with reference to an illustrated embodiment.

Groove 2 is provided in the joint 1 that can be created at the construction joint location during tunnel lining concrete construction.
Along the upper outer surface of the elastic gutter body 3 formed in an upwardly opening shape, a band-shaped weather-resistant cushioning elastic body 4 made of, for example, independent foam is adhered or a protrusion 19 is provided facing the upper outer side of the gutter body 3. 20 and fix it, and the gutter body 3
A convex strip 5 with an arcuate cross section is provided at the center of the bottom surface of the water guide, grooves 6 and 7 with an arcuate cross section are provided on the left and right sides of the protrusion strip 5, and a plurality of holes 8 for bolt insertion are provided at intervals at the top of the protrusion strip 5. A gutter 9 is provided, a hole 11 for bolt insertion is provided at the top of the inverted U-shaped leaf spring body 10, the ends of both legs are curved inward, and the curved portions 12 and 13 are inserted into the left and right grooves on the bottom of the water guide gutter 9. 6 and 7, and the hole 11 at the top of the leaf spring body 10 and the hole 8 at the top of the protrusion 5 at the bottom of the water guide gutter 9.
Insert the bolt 14 into the inverted U-shaped leaf spring body 1 by fitting the seal packing 15 and round bar-shaped washer 16 into the threaded part protruding from the water guide gutter 9, and tightening with the nut 17.
0 to the water guide gutter 9, and the water guide gutter 9 to the channel groove 2.
The nut 17 is further screwed in to make the inverted U-shaped leaf spring body 10 bulge out laterally, and the inner surface of the water guiding gutter 9 is pressed, and the band-shaped buffer elastic body 4 on the outside of the upper part of this gutter is inserted into the channel groove. This relates to a construction method in which water leaking from the joints of the channel is guided to the gutter by pressing the filling material 18 onto the wall surface of the channel 2 and filling the gap between the wall surface of the groove and the side surface of the water guide gutter 9.

According to the present invention, the upper part of the water guide gutter 9 is always pressed outward with preload by the inverted U-shaped leaf spring bodies 10 at appropriate intervals, so that the elasticity of the water guide gutter 9 itself and the inverted U-shaped leaf spring Due to the strong pressing force of the body 10, the band-shaped elastic body 4 on the outside upper part of the water guide gutter comes into close contact with the wall surface of the groove 2 of the channel even if the wall surface is rough, and even if there is a slight change in the joint part of the channel, water can be guided. Since the upper part of the gutter is strongly pressed outward by the preload of the leaf spring body 10, water does not leak from between the band-shaped elastic body 4 and the wall surface of the channel groove.

Even if there is some change in the joint part, the preload applied to the leaf spring 10 will eliminate the gap between the upper outer part of the gutter body and the concrete wall, and even if a larger gap occurs, the nut 17 can be screwed in. If a pressing force is applied, the upper outer part of the elastic gutter body 3 will come into closer contact with the wall surface, and water leakage can be completely prevented.

As shown in Fig. 7, one end of the shaft of the anchor bolt 20 is buried in the concrete at the bottom of the groove at the lining concrete construction joint, and the exposed threaded part 21 is buried.
A nut 22 is screwed into the middle of the groove, and a water guide gutter can be installed in the groove below the nut 22 using the same mounting method as described above. By using this construction method, the water guide gutter can be securely fixed in place within the canal groove.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention.
The figure is a cross-sectional view of the water guide gutter installed in the trench, Figure 2 is an explanatory cross-sectional view of the water guide gutter installed in the ditch, Figure 3 is a front view of the same, and Figure 4 5 is a sectional view of the inverted U-shaped leaf spring body, FIG. 6 is a plan view of the same, and FIG. 7 is a sectional view of another embodiment in which the water guide gutter is installed in the groove of the ditch. It is. 1... joint, 2... groove made in the tunnel, 3...
Elastic gutter body, 4... Weather-resistant buffer elastic body, 5... Protruding strip, 6, 7... Arc-shaped groove, 8... Bolt insertion hole of gutter body, 9... Water guide gutter, 10... Inverted U Shaped leaf spring body, 11...Bolt insertion hole of leaf spring body, 12,
13... Curved portion of the leg of the leaf spring body, 14... Bolt, 15... Seal packing, 16... Round bar washer, 17... Nut, 18... Filler.

Claims (1)

[Claims] 1 Groove 2 with joint 1 at the bottom on the inner surface of the channel
A band-shaped weather-resistant cushioning elastic body 4 is fixed along the upper outer surface of the elastic gutter body 3 formed in an upwardly opening shape, and a convex shape 5 having an arc-shaped cross section is provided at the center of the bottom surface of the gutter body 3. Grooves 6 and 7 with an arcuate cross section are provided on the left and right sides, and a water guide gutter 9 is provided at the top of the protrusion 5 with a plurality of bolt insertion holes 8 at intervals, and an inverted U-shaped leaf spring body 1
A bolt insertion hole 11 is provided at the top of the plate spring body 10, and the ends of both legs of the leaf spring body 10 are curved inward in an arc shape, and these curved parts 12, 13 are inserted into the left and right grooves 6, 7 on the bottom of the water guide gutter 9. Insert the bolt 14 into the hole 11 at the top of the leaf spring body 10 and the hole 8 at the top of the protrusion 5 at the bottom of the water guide gutter.
, and fit the seal packing 15 and round bar-shaped washer 16 into the threaded part protruding from the water guide gutter 9, and then tighten the nut 1.
7, attach the inverted U-shaped leaf spring body 10 to the water guide gutter 9, fit the water guide gutter 9 into the channel groove 2, and further screw in the nut 17 to bulge out the inverted U-shaped leaf spring body 10 laterally. Then, press the inner surface of the water guide gutter 9 to press the band-shaped buffer elastic body 4 on the outside of the upper part of this gutter to the wall surface of the groove 2 of the tunnel, so that the wall surface of this groove and the water guide gutter 9 are compressed.
A construction method for directing water leakage from a channel joint, characterized in that a filling material 18 is filled between the side surface of the channel and the water leakage from the joint is directed to a water guide gutter.