JP2012246681A - Method of installing expansion spacing cut-off material of divided steel expansion device and cut-off band used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of installing an expansion spacing cut-off material of a divided steel expansion device with which integrally molded cut-off materials can be installed continuously from a terminal portion side or the like of an expansion device on an outer side surface of a bridge, and a cut-off band used therefor.SOLUTION: A method of installing an expansion spacing cut-off material includes an installation step of a cut-off band 3 and a cut-off layer forming step. In the installation step of the cut-off band 3, a cut-off sheet 31 having a width larger than maximum expansion spacing along the expansion spacing of a divided steel expansion device 1 is used as a base material and for the cut-off band 3, a tube 32 having a mesh area is fixed in the center of the width of an upper surface of the cut-off sheet 31. Both sides of the cut-off band 3 in a width direction are mounted on a surface of a web plate 11 forming the expansion spacing, thereby continuously installing the cut-off bands. In the cut-off layer forming step, a foamed elastic cut-off seal material 2 is injected from a terminal portion of the tube 32 having the mesh area of the cut-off band 3, the foamed elastic cut-off seal material 2 is leaked from the mesh area of the tube 32, and the injected foamed elastic cut-off seal material 2 is hardened, thereby forming a foamed elastic cut-off layer comprised of the foamed elastic cut-off seal material 2 on the cut-off sheet 31 of the cut-off bands 3 installed continuously along the expansion spacing.

Description

  TECHNICAL FIELD The present invention relates to a method for installing a floating water stop material of a split steel expansion and contraction device and a water stop zone used therefor, and in particular, a split steel for preventing rainwater and the like from leaking and dropping from the gap between split steel expansion and contraction devices. The present invention relates to a method for installing an idle water-stop material for a telescopic device and a water-stop zone used therefor.

Road bridges and road viaducts expand and contract due to temperature changes in the bridge slabs and vibrate and expand due to earthquakes, etc. In order to absorb this expansion and contraction, expansion devices are installed at regular intervals with respect to the bridge length. .
On the other hand, rainwater that falls on the road surface leaks down from the gap between the expansion and contraction devices, promotes corrosion of the support that supports the bridge, not only impairs the support function and expansion function of the bridge, but also damages the bridge. There may be.
Furthermore, when the viaduct roadside site is used for parks and parking lots, it may interfere with its use.

  In order to cope with this, conventionally, as shown in FIG. 1, a backup material b is installed in the gap between the steel expansion and contraction device Q, and an elastic water-sealing seal material a is injected and filled into the upper layer thereof, and the curing reaction is performed. At the same time, a method has been proposed in which the gap between the expansion and contraction devices Q is stopped by bonding and fixing to the surface of the web plate forming the clearance between the expansion and contraction devices Q.

In addition, a structure in which a rubber water stop u is installed between the steel expansion and contraction device Q to stop the water (see FIG. 2) and the elastic water sealing material a and rubber between the expansion and contraction device Q are made of rubber. A combined structure (see FIG. 3) for installing a waterstop u is also proposed.
The method for stopping the gap between the expansion and contraction devices Q is to install a water stop material such as a water stop u at the factory where the steel expansion and contraction device Q is manufactured. Carry in and lay.
For this reason, there has been a problem that careful work is required for handling the expansion and contraction device with a water stop material when carrying in and laying.
Also, when the steel expansion / contraction device Q is long, the expansion / contraction device Q is divided and manufactured and laid. In this case, after the expansion / contraction device Q is laid, Adhesive connection to stop water between play.
The water stop material is connected by injecting and filling a water stop seal material from the road surface to the water stop connection portion or by injecting and bonding an adhesive sealant into the joint portion. In the method, it is difficult to confirm the connection state of the joint portion of the water-stopping material, which is uncertain and may cause a problem.
In addition, a method of injecting an adhesive sealing material into the joint portion of the water-stopping material from under the road, or overlapping and adhering a rubber water-proof sheet has also been proposed. It is difficult to confirm the connection state of the joint, which is uncertain and may cause problems. Also, this work requires a work space directly under the telescopic device Q. There was a problem that the material could not be installed.
In addition, after laying the steel expansion and contraction device Q manufactured separately, there has also been proposed a method of inserting and installing a water stop material that is integrally formed continuously between the expansion and contraction device Q from under the road. There is a problem that a work space is required directly below the expansion device Q, and the water stop material cannot be installed in a field environment where there is no work space.

  In this way, when the steel expansion and contraction device is divided and manufactured and divided and laid on a road bridge or road viaduct, in order to stop water with a water stop material that is integrally formed continuously between the expansion and contraction devices, A work space is required directly below.

  The present invention also installs a water stop material that is integrally formed continuously from the end of the expansion device on the outer surface of the bridge, etc., even in a split steel expansion device in an environmental situation where there is no such work space. It aims at providing the installation method of the idle water stop material of the split-steel expansion-contraction apparatus which can perform, and the water stop zone used for it.

  In order to achieve the above-described object, the method for installing the idle water stop material of the split steel expansion and contraction device according to the present invention is based on a waterproof sheet having a width larger than the maximum clearance along the gap of the split steel expansion and contraction device. And by attaching a water stop band to which a tube having a mesh region is fixed at the center of the width of the upper surface of the water stop sheet to the surface of the web plate that forms a gap on both sides in the width direction of the water stop band. The foaming elastic water sealing material is leaked from the network region of the tube by injecting the foaming elastic water sealing material from the end of the tube having the network region of the water blocking zone and the installation process of the water blocking zone to be installed. At the same time, by curing the injected foamed elastic waterproofing seal material, a foamed elastic waterproofing layer is formed by the foamed elastic waterproofing sealant on the waterproofing sheet of the waterproofing zone continuously installed along the gap. Water stop layer shape Characterized in that comprising the step.

  In this case, a bead rubber is fixed on both sides in the width direction of the water-stop sheet, and the water-stop band is installed by inserting the bead rubber into a C-shaped rail support disposed on the surface of the web plate that forms a gap. To be able to.

  Further, by inserting a guide pull-in sheet into the C-shaped rail support in advance, connecting one end of the bead rubber of the water stop band to one end of the guide pull-in sheet, and pulling the other end of the guide pull-in sheet, The bead rubber of the belt can be drawn into the C-shaped rail support.

  In addition, the bead rubber inserted into the C-shaped rail support may be subjected to a weight between the foamed elastic water-stop sealing material via a water-stop sheet, thereby sealing between the C-shaped rail support and the bead rubber. it can.

  Moreover, the foaming elastic water-stopping layer which has a gradient can be formed by attaching the both sides of the width direction of a water-stopping zone with the gradient to the surface of the web plate which forms a play gap.

  Further, following the installation process of the water stop zone, a web support plate is formed in which a guide support rope is stretched along the play between the split steel expansion and contraction devices, and a spray nozzle is suspended and moved on the guide support rope. A primer can be sprayed onto the surface of the substrate.

  Further, the water-stopping layer forming step can be performed after the dust-proof layer made of the open-cell rubber member is disposed on the back surface of the face plate of the split steel expansion and contraction device.

Moreover, the waterstop used for the installation method of the idle waterstop material of the split steel expansion and contraction device of the present invention is a tube having a mesh area in the center of the width of the upper surface of the waterstop sheet. It is characterized by being fixed.
Here, as for the mesh area | region of a tube, a part or all of the surrounding surface of the circumference of the tube which consists of woven fabrics can be meshed, for example.

  In this case, bead rubber can be disposed on both sides of the water stop sheet in the width direction.

According to the installation method of the idle water stop material of the split steel expansion and contraction device of the present invention and the waterproof band used therein, even when the split steel expansion and contraction device is divided and laid, the stop water zone is continuously provided between the idles. By installing and forming a foam elastic water stop layer with a foam elastic water seal material on the water stop sheet of the installed water stop zone, it has a double water stop structure of the foam elastic water stop layer and the water stop sheet It is possible to construct a continuous and uninterrupted waterstop material.
In this case, in particular, the foamed elastic water sealing material injected from the end of the tube in the water stop zone will overflow evenly from the mesh area of the tube over the entire length of the tube due to the injection pressure and the foaming reaction expansion pressure. Thus, a uniform foamed elastic water-stopping layer is formed on the water-stopping sheet of the water-stopping band installed between the play of the split steel expansion and contraction device.
Moreover, even if a water-stop zone used for the installation method of the idle water-stop material of a split-steel expansion-contraction apparatus is long, it can wind up and can handle easily at the time of carrying in and laying.

  In addition, a bead rubber is fixed on both sides in the width direction of the water stop sheet, and the water stop band is installed by inserting the bead rubber into a C-shaped rail support disposed on the surface of the web plate forming a gap. Thus, the waterstop can be easily and reliably installed.

  Further, by inserting a guide pull-in sheet into the C-shaped rail support in advance, connecting one end of the bead rubber of the water stop band to one end of the guide pull-in sheet, and pulling the other end of the guide pull-in sheet, By putting the bead rubber of the belt into the C-shaped rail support, the waterstop can be installed more easily.

  In addition, by applying the weight of the foamed elastic waterproof seal material to the bead rubber inserted into the C-shaped rail support through the waterproof sheet, the seal between the C-shaped rail support and the bead rubber is performed. Water can be reliably stopped.

  In addition, by attaching the both sides in the width direction of the water stop zone with a gradient to the surface of the web plate that forms a gap, the foamed elastic water seal material has a reduced liquid density due to the foaming reaction, and the surface of the foam cell. The fluidity is suppressed by the tension, and the foaming elastic waterstop layer having a gradient can be formed by filling the gradient with a uniform thickness, so that the idle waterstop material can be drained smoothly.

  Further, following the installation process of the water stop zone, a web support plate is formed in which a guide support rope is stretched along the play between the split steel expansion and contraction devices, and a spray nozzle is suspended and moved on the guide support rope. By spray-coating the primer on the surface, the adhesiveness between the surface of the web plate forming the gap and the foamed elastic water-stopping layer can be improved, and water-stopping can be reliably performed.

  In addition, after placing a dust-proof layer made of open-cell rubber member on the back of the faceplate of the split steel expansion and contraction device, the water-stopping layer forming process is performed, so that the foamed elastic water-stopping sealant overflows on the road surface. Therefore, the space between the play can be surely filled with the foamed elastic water stop layer by the foamed elastic water seal material. Further, the surface of the foamed elastic water-stopping layer can be protected by a dustproof layer to ensure durability, and sedimentation of sediment in the steel expansion and contraction device can be prevented.

It is sectional drawing of the elastic water sealing material filling water stop structure of the conventional steel expansion-contraction apparatus. It is sectional drawing of the water stop structure by the water stop of the conventional steel expansion-contraction apparatus. It is sectional drawing of the double water stop structure which used together the water stop structure by the elastic water seal material filling of the conventional steel expansion-contraction apparatus and the water stop structure by a water stop. It is sectional drawing of the split-steel expansion-contraction apparatus to which the installation method of the idle water stop material of the split-steel expansion-contraction apparatus of this invention is applied. It is a perspective view of the C-shaped rail support tool arrange | positioned at a split-steel expansion-contraction apparatus. It is a perspective view of a water stop zone. It is explanatory drawing which shows the insertion state of an induction | guidance drawing sheet. It is a perspective view of an induction drawing sheet. It is explanatory drawing which shows the drawing-in state of a water stop zone. It is explanatory drawing of the installation process of the water stop zone of the installation method of the idle water stop material of the expansion | extension apparatus made from split steel of this invention. It is explanatory drawing of the water stop layer formation process of the installation method. It is explanatory drawing which shows the state which the construction of the installation method was completed. It is explanatory drawing which shows the state which the construction of the installation method which arrange | positioned the dust-proof layer was completed. It is explanatory drawing of the water stop layer formation process of the installation method. It is explanatory drawing of the front process in the case of performing the primer application | coating operation | work in the installation method. In the same installation method, it is explanatory drawing of the laying process of the induction | guidance | derivation support rope in the case of performing the primer application | coating operation | work. It is explanatory drawing of the primer application process in the case of performing the primer application | coating operation | work in the same installation method.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a method for installing an idle water stop material of a split steel expansion and contraction device of the present invention and an embodiment of a water stop zone used for the same will be described below with reference to the drawings.

The installation of the idle water stop material of the split steel expansion and contraction device includes a water stop band installation step shown in FIG. 10 and a water stop forming a foamed elastic water stop layer by the foamed elastic water seal material shown in FIG. And a layer forming step.
More specifically, as shown in FIG. 10, the water-stop material G of the split steel expansion / contraction device 1 has a width greater than the maximum clearance along the play of the split steel expansion / contraction device 1. 31 is a web plate 11 having a base 31 and a water stop zone 3 in which a tube 32 having a mesh region is fixed at the center of the upper surface of the water stop sheet 31 and a gap between both sides in the width direction of the water stop zone 3. As shown in FIG. 11, the foamed elastic water sealing material 2 is injected from the end of the tube 32 having the mesh area of the water blocking zone 3 as shown in FIG. By doing this, the foamed elastic waterproofing sealing material 2 is leaked from the mesh region of the tube 32, and the injected foamed elastic waterproofing sealing material 2 is cured, so that the waterproofing belt 3 continuously installed along the gap is provided. Foam on the water-stop sheet 31 It is established by the water stop layer forming step of forming a foamed elastic waterproofing layer by sex waterproofing and sealing material 2.

As a result, even when the split steel expansion and contraction device 1 is divided and laid, the water stop zone 3 is continuously installed in the play, and the foamed elastic water stop seal is provided on the water stop sheet 31 of the installed water stop zone 3. By forming the foamed elastic water-stopping layer by the material 2, a continuous monolithic waterstop material G having a double water-stopping structure of the foamed elastic water-stopping layer and the water-stop sheet 31 can be constructed.
In this case, in particular, the foamed elastic water sealing material 2 injected from the end of the tube 32 of the water stop zone 3 is evenly distributed over the entire length of the tube 32 from the mesh region of the tube 32 by the injection pressure and the foaming reaction expansion pressure. As a result, a uniform foamed elastic water-stopping layer is formed on the water-stopping sheet 31 of the water-stopping band 3 installed between the split steel telescopic devices 1.
Moreover, even if the water-stop zone 3 used for the installation method of the idle water-stop material G of the split-steel expansion-contraction apparatus 1 is long, it can be wound up and handled easily at the time of carrying in and laying. Can do.

In this case, bead rubber 33 is fixed to both sides of the water stop sheet 31 in the water stop zone 3 in the width direction, and the bead rubber 33 is attached to the C-shaped rail support C disposed on the surface of the web plate 11 forming a gap. By inserting, the water stop zone 3 can be installed.
Thereby, installation of the water stop zone 3 can be performed easily and reliably.
Note that, in addition to the above-described method, the band plate (not shown) is attached to both sides of the water stop sheet 31 of the water stop band 3 in the width direction in addition to the above-described method. Arbitrary methods such as a method of arranging and screwing to the surface of the web plate 11 through a band plate, a method of adhering both sides of the water-stop sheet 31 of the water-stop band 3 to the surface of the web plate 11, etc. Can do.

Here, when the C-shaped rail support C is used, the C-shaped rail support shown in FIG. 5 is formed on the surface of the web plate 11 forming the gap of the split steel telescopic device 1 as shown in FIG. The tool C is previously installed by welding or the like at a factory or the like.
It is preferable to make a corner cut C2 at both corners of the rail C1 of the C-shaped rail support C.
Also, the dimension X of the installation position of the C-shaped rail support C shown in FIG. 4 is the design thickness X1 of the foamed elastic waterstop layer by the foamed elastic waterstop sealing material 2 shown in FIG. The setting is made based on the added value of the design gap dimension X2 between the upper surface of the layer and the rear surface of the face plate 12 of the split steel expansion and contraction device 1.

When the waterstop 3 is pulled into the split steel expansion and contraction device 1, the guide pull-in sheet S shown in FIG. 8 is provided in advance on the C-shaped rail support C of the split steel expansion and contraction device 1 over the entire length of the split steel expansion and contraction device 1. Is inserted, one end of the bead rubber 33 of the water stop band 3 is connected to one end of the guide pull-in sheet S, and the other end of the guide pull-in sheet S is pulled, so that the bead rubber 33 of the water stop band 3 is C-shaped. It can be pulled into the rail support C.
As the induction pull-in sheet S, for example, a tough high elastic modulus hard synthetic resin sheet such as a polyester resin sheet can be used, and the tip S1 is preferably subjected to corner cutting.
Moreover, it is preferable that the width hs of the induction | guidance | derivation drawing-in sheet | seat is made equivalent to the dimension h of the height direction of the bead rubber | gum 33 of the water stop zone 3 mentioned later.
As a result, when the split steel expansion and contraction device 1 is divided and laid in combination with the corner cuts C2 at both end corners of the rail C1 of the C-shaped rail support C, the connection cross section matches. Even if there is a gap or misalignment, the water stop sheet 31 of the water stop zone 3 is caught on the corner of the rail C1 of the C-shaped rail support C, so that the pull-in is not hindered or damaged. The water zone 3 can be easily installed.

As shown in FIG. 6, the water-stop zone 3 is based on a strong and flexible water-stop sheet 31 having a width larger than the maximum clearance of the split steel expansion and contraction device 1, and the width center of the upper surface of the water-stop sheet 31. In addition, a tube 32 made of a woven fabric having a mesh region is fixed, and bead rubbers 33 are fixed to both sides of the water-stop sheet 31 in the width direction.
More specifically, the water-stop sheet 31 employs, for example, a sheet obtained by coating both surfaces of 0.5 mm thick polychloroprene rubber on a woven fabric made of 6 nylon filament fibers shown in Table 1, and the water-stop sheet 31 is used. The dimension p of the gap on the front surface of the rail C1 of the C-shaped rail support C is set so as to be slightly wider than the thickness of the rail.

  The tube 32 made of a woven cloth having a mesh region fixed to the center of the width of the upper surface of the water-stop sheet 31 is formed of a mesh 32a so that the foamed elastic water-stop seal material 2 can pass through the surface. The true circle diameter is preferably equal to or less than the minimum clearance of the split steel expansion and contraction device 1.

  The bead rubber 33 fixed to both sides in the width direction of the water-stop sheet 31 employs a highly durable soft rubber, for example, the hardness 60 ° of polychloroprene rubber shown in Table 2, and the dimension h in the height direction is: It is 70 to 80% of the dimension H in the height direction of the C-shaped rail support C shown in FIG. 5 so as to be larger than the dimension p of the gap on the front surface of the rail C1 of the C-shaped rail support C. The thickness t is set to 20 to 80% of the dimension w in the width direction of the rail C1 of the C-shaped rail support C.

By the way, in order to improve the adhesiveness between the surface of the web plate 11 that forms a gap between the expansion and contraction devices 1 made of divided steel and the foamed elastic waterstop layer by the foamed elastic waterstop material 2, as shown in FIG. Can be spray applied.
For this primer, for example, an isocyanate compound can be used.
Specifically, this primer spray application operation is performed by suspending and moving the primer application spray nozzle N on the guide support rope V stretched in the center of the space between the split steel expansion and contraction devices 1 while moving the surface of the web plate 11. Spray the primer.
As shown in FIG. 16, the guide support rope V is pulled into the play between the split steel expansion and contraction devices 1, as shown in FIG. 16. The guide support rope V is guided and supported on the water stop sheet 31 of the water stop zone 3. This can be done by setting the rope V and pulling the guide support rope V together with the waterstop 3 from the end of the split steel telescopic device 1 outside the bridge.
Then, a tension fixing jig (not shown) of the guide support rope V is attached to the upper part of the free ends of the both ends of the split steel expansion and contraction device 1 outside the bridge, and the guide support rope V is fixed and tensioned to the tension fixing jig. The spray nozzle N is suspended from the rope V, and the primer is sprayed.
After the application of the primer, the guide support rope V and the spray nozzle N are removed.
In addition, application | coating of a primer can also be implemented from the clearance gap between the faceplates 12 of the expansion | extension apparatus 1 made from a divided steel.

As shown in FIG. 14, injection of the foamed elastic water sealing material 2 is performed by connecting the injection hose R of the injection pump M to one end of the tube 32 of the water stop zone 3 and closing the other end of the tube 32. The foamed elastic water sealing material 2 is injected into the tube 32.
The foamed elastic waterproofing seal material 2 injected into the tube 32 starts foaming reaction expansion. For example, in the case of the foamed elastic waterproofing sealant 2 shown below, the main component of the foamed elastic waterproofing sealant 2 at 20 ° C. After the mixing of the curing agent and the curing agent, the foaming reaction is started in about 3 minutes, 85 to 90% of the foaming reaction is completed in about 12 minutes, and the internal pressure of the foamed elastic water sealing material 2 injected and filled into the tube 32 is sufficiently high. It has become.
As a result, the injection pressure of the injection pump M is also added, the pressure in the tube 32 is further increased, and the foamed elastic water-stop sealing material 2 overflows from the mesh 32a of the tube 32, and a foamed elastic water-stop layer is formed. . At this time, the overflow amount of the foamed elastic water sealing material 2 is substantially proportional to the internal pressure of each part, but the internal pressure of the tube 32 is mainly generated by the self-reactive expansion pressure and is uniformly generated over the entire length of the tube 32. Since the injection pressure of the injection pump M is uniformly transmitted and added thereto, the foamed elastic water sealing material 2 is uniformly distributed from each part of the mesh 32a formed almost uniformly on the tube 32 as a result. Overflowing and forming a uniform foamed elastic water-stopping layer by the foamed elastic water-proof sealant 2 can be formed.

Further, the foamed elastic water sealing material 2 expands due to the foaming reaction, and its liquid density is low. For example, the density of the unfoamed reaction of the foamed elastic water sealing material 2 is about 1.10, but after the completion of the foaming reaction. The density is about 0.58, and the liquid tension due to the surface tension of the foam cell and the increase in the liquid viscosity due to the foaming reaction suppresses the fluidity of the liquid layer, and the web forms the gap on both sides in the width direction of the water stop zone 3. When the surface of the plate 11 is attached with a gradient, the foamed elastic waterproofing sealing material 2 is prevented from flowing and concentrating at a lower position, and a foamed elastic waterproofing layer having a substantially constant gradient is formed. be able to.
Thereby, the foaming elastic water stop layer which has a gradient can be formed easily, and drainage of the idle water stop material can be performed smoothly.

  The foamed elastic water-stop sealing material 2 used and its characteristics are as shown in Tables 3 to 5 below. Here, Table 3 shows the properties at 25 ° C. of the main agent and the curing agent, which are constituents of the foamed elastic water sealing material 2, Table 4 shows the properties at 25 ° C. in which the main agent and the curing agent are mixed, and Table 5 shows The main agent and the curing agent are mixed, and normal characteristics after a curing reaction at 25 ° C. for 72 hours are shown. In addition, the viscosity measurement of Table 3 and Table 4 is made to measure the generated torque when it rotates with the rotation speed of 2 rpm with the 4th rotation rotor of a BH type viscometer. In addition, the foaming start time and the flow stop time were determined by visual observation and finger touch feeling determination.

By the way, as shown in FIGS. 11 and 12, the foamed elastic water sealing material 2 injected into the tube 32 of the water stop zone 3 overflows through the mesh 32 a of the tube 32, and the water stop sheet of the water stop zone 3. Stay on top of 31.
At this time, the weight of the foamed elastic water-stop sealing material 2 is transmitted to the bead rubber 33 through the water-stop sheet 31 and strongly abuts against the inner surface C3 of the rail C1 of the C-shaped rail support C, thereby causing the foamed elastic water-stopping water. The seal material 2 can be prevented from leaking downward from the water stop zone 3 and the seal between the C-shaped rail support C and the bead rubber 33 can be reliably performed.

Further, as shown in FIG. 13, a dust-proof layer 4 made of an open-cell rubber member, more specifically, an open-cell sponge sheet made of EPDM rubber, for example, is provided on the back surface of the face plate 12 of the split steel expansion and contraction device 1. After the arrangement, a water blocking layer forming step by injection of the foamed elastic water sealing material 2 can be performed.
In this case, the dust-proof layer 4 is bonded and fixed to the back surface of the face plate 12 of the split steel expansion / contraction device 1 in advance, and is also fixed to the back surface of the face plate 12 after the split steel expansion / contraction device 1 is installed. You can also.
When the dustproof layer 4 is provided, the primer is applied to the surface of the web plate 11 by an arbitrary method before the dustproof layer 4 is bonded and fixed.
Table 6 shows the characteristics of the open-cell sponge sheet made of EPDM rubber used for the dust-proof layer 4.
Thereby, there is no danger of overflowing the foamed elastic waterproofing sealing material 2 on the road surface, and the foamed elastic waterproofing layer by the foamed elastic waterproofing sealing material 2 can be reliably filled in the space between the play. Moreover, while protecting the surface of a foaming elastic water stop layer with the dust-proof layer 4, durability can be ensured, and it can prevent that earth and sand accumulate in the split-steel expansion-contraction apparatus 1. FIG.

  Thus, the idle waterstop material G of the split steel expansion and contraction device 1 constructed according to the present invention is continuously integrated, and in particular, the waterstop 3 and the waterstop 3 that are constituent members thereof are stopped. Since the foamed elastic water-stopping layer constituted by the foamed elastic water-stopping sealing material 2 is also continuously integrated on the water sheet 31, it is a continuous integrated loose waterstop material G having this double water-stopping structure. Thus, it is possible to reliably stop water between the split steel telescopic devices 1.

  As mentioned above, although the installation method of the idle water stop material of the split-steel expansion-contraction apparatus of this invention and the water stop zone used for it were demonstrated based on several Example, this invention is limited to the structure described in the said Example. However, the configuration can be changed as appropriate without departing from the spirit of the invention, for example, by appropriately combining the configurations described in the embodiments.

  The installation method of the idle water stop material of the split steel expansion and contraction device of the present invention and the water stop zone used for the same are installed from the end side of the expansion device on the outer surface of the bridge, etc. Since it can be used, it can be suitably used for a steel telescopic device that is long and has a large gap, and can be widely used for other steel telescopic devices.

DESCRIPTION OF SYMBOLS 1 Divided steel expansion and contraction device 11 Web plate 12 Face plate 2 Foam elastic waterproof seal material 3 Waterproof belt 31 Waterproof sheet 32 Tube 32a Mesh 33 Bead rubber 4 Dust-proof layer C C-shaped rail support C1 Rail G Gap seal M injection pump N spray nozzle R injection hose S induction pull-in sheet V induction support rope

Claims (9)

  A waterstop sheet having a water stop sheet having a width larger than the maximum free space along the play of the split steel expansion and contraction device as a base material, and a tube having a mesh region fixed to the center of the upper surface of the water stop sheet, A step of installing a water stop zone that is continuously installed by attaching both sides in the width direction of the water stop zone to the surface of a web plate that forms a gap, and foaming from an end of a tube having a mesh region of the water stop zone By injecting the elastic water sealing material, the foamed elastic water sealing material is leaked from the network area of the tube, and the injected foam elastic water sealing material is hardened to install continuously along the gap. A waterstop layer forming step of forming a foamed elastic waterstop layer by a foamed elastic waterstop seal material on a waterstop sheet of the waterstop band that has been formed. Installation method.   A bead rubber is fixed to both sides in the width direction of the water-stop sheet, and the water-stop band is installed by inserting the bead rubber into a C-shaped rail support disposed on the surface of the web plate forming a gap. The installation method of the idle water stop material of the split-steel expansion-contraction apparatus of Claim 1.   A guide pull-in sheet is inserted into the C-shaped rail support in advance, one end of the bead rubber of the water stop band is connected to one end of the guide pull-in sheet, and the other end of the guide pull-in sheet is pulled, thereby 3. The method for installing an idle water stop material for a split-steel expansion / contraction device according to claim 2, wherein the bead rubber is pulled into the C-shaped rail support.   The seal between the C-shaped rail support and the bead rubber is performed by applying the weight of the foamed elastic waterproof seal material to the bead rubber inserted into the C-shaped rail support through a waterproof sheet. The installation method of the idle water stop material of the split-steel expansion-contraction apparatus of 2 or 3.   A fired elastic water-stopping layer having a gradient is formed by attaching the both sides in the width direction of the water-stopping band with a gradient to the surface of the web plate forming a gap. The installation method of the idle water stop material of the split-steel expansion-contraction apparatus of 4 description.   Following the waterstop installation process, a guide support rope is stretched along the gap between the split steel expansion and contraction devices, and a spray nozzle is suspended on the guide support rope to form a gap while moving the surface. 6. A method for installing an idle water-stopping material for a split-steel expansion / contraction apparatus according to claim 1, wherein a primer is spray-coated on the steel sheet.   The waterstop layer forming step is performed after disposing a dustproof layer made of an open-cell rubber member on the back surface of the face plate of the split steel expansion and contraction device. The installation method of the idle water stop material of the split steel expansion-contraction apparatus of description.   A water-stopping band comprising a water-stopping sheet as a base material, and a tube having a mesh region fixed to the center of the upper surface of the water-stopping sheet.   The water stop zone according to claim 8, wherein bead rubber is fixed to both sides in the width direction of the water stop sheet.

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