JP2010053511A - Method for constructing road with smooth face material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for constructing a road with a smooth face material, which obtains an extremely smooth sliding surface, excellent in abrasion resistance, has a long life and also has high strength with an inexpensive structure, in which expansion and contraction caused by a change in the temperature of a beam can be stably and smoothly transferred to an expansion device and the costs of construction and material are low. <P>SOLUTION: In the method for constructing the road, a base 22 arranged on an earthwork section-side road surface is partially supported by an abutment 13; a precast extended floor slab 16 extended to an earthwork section side from a bridge-side end is arranged on the base 22; and an integral pavement is constructed on the extended floor slab 16 and the bridge. A smooth face material 17, which has a fixing bracket 17a suspended to undersurface, is arranged on the undersurface of the extended floor slab 16; and an injection hole 25 communicating with the undersurface of the smooth face material 17 is provided from a top surface of the extended floor slab 16 in advance. Subsequently, a grout material 28 is injected into a gap between a top surface of the base 22 and the undersurface of the smooth face material 17 is provided from the injection hole 25 of the extended floor slab 16 and the smooth face material 17 arranged on the base 22, so as to form the smooth sliding surface with the smooth face material 17 on the top surface of the base 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a road construction method using a smooth material, and more particularly, to a road construction method using a smooth material for constructing an extended floor board using an existing concrete structure.

  As a road construction method by forming a smooth surface, the roadbed on the earthwork department side is shaped and a concrete bottom slab (main floor slab) is placed, and a part of the bottom slab is received by the abutment, and the bridge side is placed on the bottom slab. A construction method is known in which an extended floor slab made of precast concrete extending from the end of the earthwork to the earthworking part side is arranged, and an integrated pavement is constructed on the extended floor slab and the bridge (see, for example, Patent Document 1). .

  The invention described in Patent Document 1 can suppress the generation of noise and the structure because there is less shock when the vehicle passes compared to a conventional load-supporting steel finger joint telescopic device provided at the end of a bridge girder. Easy and inexpensive to build.

  By the way, the extension floor slab is repeatedly stretched and contracted due to temperature changes on the bridge side, so that the bottom slab surface is required to have a high-precision and high-quality finished surface. For this reason, both extended floor slabs and bottom slabs are precast products. However, precast products are expensive due to high material and production costs, and require a relatively long time for laying and replacement work.

  Therefore, when building an extended floor slab using an existing concrete structure (bottom slab), a road construction that can easily and inexpensively form a high-precision and high-quality sliding surface on the top surface of the bottom slab. A construction method has already been proposed by the present applicant (see Patent Document 2).

In the road construction method described in Patent Document 2, a part of the bottom slab arranged on the road surface on the earthwork part side is received by the abutment and is extended from the end on the bridge side to the earthwork part side on the bottom slab. The precast extended floor slab is arranged, and the extended floor slab and the bridge are constructed as a single pavement, and provided in advance through the injection hole from the upper surface to the lower surface of the extended floor slab, A water repellent / peelable member is coated on the lower surface of the extended floor slab, and a grout material is inserted into the gap between the upper surface of the bottom slab and the lower surface of the extended floor slab from the injection hole of the extended floor slab disposed on the bottom slab. And a smooth sliding surface is formed on the upper surface of the bottom plate.
JP 2004-084280 A Japanese Patent No. 3955053

  According to the road construction method of Patent Document 2, the grout material injected from the injection hole of the extended floor slab is hardened on the lower surface of the extended floor slab, and the surface becomes a very smooth sliding surface. For this reason, it is possible to construct an extended floor slab using the bottom slab of an existing bridge or a cast-in-place concrete slab, but the extended floor slab and the grout material are in direct contact with each other. The frictional resistance increases due to the decrease, and sufficient sliding action cannot be obtained. Further, since the thickness of the grout material is thin, sufficient durability against repeated impact loads cannot be expected. As a result, there has been a problem that the expansion and contraction due to the temperature change of the girders cannot be stably and smoothly transmitted to the expansion and contraction device.

  Therefore, an extremely smooth sliding surface is obtained, it has excellent wear resistance, has a long service life, and it can stably and smoothly transmit expansion / contraction due to temperature changes of the girders to the expansion / contraction device, and it has an inexpensive structure and high strength. Thus, a technical problem to be solved arises in order to be able to provide the construction cost and material cost at a low cost, and the present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that a part of the bottom plate arranged on the road surface on the earthwork part side is received by the abutment, and on the bottom plate. In the road construction method in which a precast extension floor slab extending from the end of the bridge side to the earthwork part side is arranged, and the pavement integrated with the extension floor slab and the bridge is constructed, the fixing bracket is placed on the bottom surface. A smooth surface material made of a thin steel plate or a high-strength fiber panel suspended from the surface is disposed on the lower surface of the extended floor slab, and the upper surface of the extended floor slab is previously placed on the lower surface of the smooth surface material. A grouting material is injected into the gap between the upper surface of the bottom plate and the lower surface of the smoothing material from the extended floor slab disposed on the bottom plate and the injection hole of the smoothing material. The fixing bracket and the grout material are integrated, and the upper surface of the bottom plate is Road construction method according smooth surface material and forming a smooth sliding surface caused by the surface material.

  According to this structure, the grout material injected from the extension floor slab and the injection hole of the smooth surface material is filled in the gap between the smooth surface material and the bottom plate arranged on the lower surface of the extension floor slab, and It does not adhere to the bottom surface. In addition, a fixing metal fitting is suspended from the lower surface of the smooth surface material, which is inserted when the grout material is injected, and after the grout material is hardened, it is fixed to the grout material, and the fixed smooth surface material is fixed. Is secured as a stable sliding surface. Furthermore, the extended floor slab is made of precast and the lower surface is finished very smoothly, and the upper surface of the smoothing material is also finished smoothly, so that there is a gap between the lower surface of the extended floor slab and the upper surface of the smoothing material. Becomes a sliding surface with little frictional resistance. Further, since the smooth surface material itself has strength, durability against an impact load is increased.

  Invention of Claim 2 provides the road construction construction method by the smooth surface material which prevents the penetration of the said grout material between the surface of the said bottom plate, and the said grout material, and performs the primer process which ensures fluidity | liquidity To do.

  According to this configuration, the surface of the bottom plate is subjected to a primer treatment to ensure the fluidity of the grout material, so that the grout material injected from the injection hole of the extended floor plate and the smooth surface material penetrates the bottom plate. Instead, it flows over the primer material and is closely packed between the bottom plate and the smooth surface material.

  According to the first aspect of the present invention, the extended floor slab and the grout material injected from the injection hole of the smooth surface material are filled in a gap between the smooth surface material and the bottom plate disposed on the lower surface of the extended floor slab, thereby extending the floor. It does not adhere to the bottom of the plate. In addition, a fixing metal fitting is suspended from the lower surface of the smooth surface material, which is inserted when the grout material is injected, and is fixed to the grout material after the grout material is cured, so that the smooth surface material is stable. Secured as a sliding surface. Furthermore, the extended floor slab is made of precast and the lower surface is finished very smoothly, and the upper surface of the smoothing material is also finished smoothly, so that there is a gap between the lower surface of the extended floor slab and the upper surface of the smoothing material. Is a sliding surface with less frictional resistance, and a high-precision, high-quality sliding surface can be easily and inexpensively formed on the bottom surface of the extended floor slab, contributing to cost reduction and shortening the construction period. Can do. Furthermore, the temperature change of the girder can be transmitted smoothly to the telescopic device that has been moved.

  Furthermore, since the smooth surface material itself has strength, durability against impact load is increased, and the life of the concrete is prevented by preventing cracking of the concrete at the connecting portion of the floor slab on the bridge part side and the floor slab on the earthwork part side. Can be a long structure.

  According to the second aspect of the present invention, the grout material injected from the extension floor slab and the injection hole of the smoothing material flows on the primer treatment material without penetrating the bottom plate, and between the bottom plate and the smoothing material. Therefore, the grout material can be injected more reliably.

  The present invention provides an extremely smooth sliding surface, is excellent in wear resistance, has a long life, and can stably and smoothly transmit expansion / contraction due to temperature changes of the girders to the expansion / contraction device. In order to achieve the purpose of obtaining great strength and providing construction and material costs at a low cost, the abutment receives a part of the bottom plate placed on the road surface on the earthwork department side, In the road construction method in which a precast extended floor slab extended from the bridge side end to the earthwork side is disposed on the bottom slab, and the pavement integrated with the extended floor slab and the bridge is constructed, A smoothing material made of a thin steel plate or a high-strength fiber panel with a fixing metal fitting suspended from the lower surface is disposed on the lower surface of the extended floor slab, and the sliding surface is previously removed from the upper surface of the extended floor slab. If an injection hole leading to the lower surface of the face material is provided In addition, a grout material is injected into a gap between the upper surface of the bottom plate and the lower surface of the smooth surface material from the extended floor slab disposed on the bottom plate and the injection hole of the smooth surface material, and the fixing bracket and the fixing metal This was realized by integrating the grout material and forming a smooth sliding surface by the smooth surface material on the upper surface of the bottom plate.

  Hereinafter, the road construction method using the smooth surface material of the present invention will be described with reference to preferred embodiments. 1 to 3 each show a longitudinal side surface of a road near an abutment. In the figure, a bridge girder 11 forming a bridge portion 10 is placed on an abutment 13 via a support 12, and a precast extended floor slab 16 is disposed at an end of the bridge deck 14 via a connection portion 15. To do. The connecting portion 15 includes a menase hinge 15a in which reinforcing bars are crossed at a plurality of locations, and a protruding portion on the bridge portion 10 side is connected to a bridge floor slab 14 by placing an existing cast concrete 15b.

  The earthwork section 20 arranges a bottom slab 22 that is a concrete structure on a compacted embankment 21, and extends one end of the bottom slab 22 to the upper surface of the abutment 13 with an anchor bolt 24 via a buffer rubber 23. Fix it. The bottom plate 22 may be an existing bottom plate in the case of improvement work of an existing bridge, and may be a bottom plate made of cast-in-place concrete instead of a precast bottom plate even in the case of a new bridge. The bottom plate 22 may be referred to as a stepping plate.

  The extended floor slab 16 is provided on the bottom slab 22 so that a flat smooth surface material 17 is provided in close contact with the lower surface. The smooth surface material 17 may be provided on the entire lower surface of the extended floor slab 16 or may be provided partially. In this example, a case is shown in which the smoothing material 17 is partially disposed on the lower surface of the extended floor slab 16 while leaving a part of the front end side of the extended floor slab 16. Further, the extended floor slab 16 and the smooth surface member 17 are provided with injection holes 25, temporary fixing metal fittings 26, and height adjusting metal fittings 27 at positions corresponding to each other so as to penetrate from the upper surface to the lower surface. . In addition, fixing brackets 17a are vertically suspended from the lower surface of the steel plate 17.

  The temporary fixing metal fitting 26 is temporarily installed between the extended floor slab 16 and the smooth surface material 17 until the grout material 28 is hardened after being installed on the site from the factory. Removed after curing. The height adjustment metal fitting 27 adjusts the height of the extended floor slab 16 and the smooth surface material 17 with respect to the bottom slab 22. When the screwing amount of the height adjustment metal fitting 27 is changed, The height and inclination of the smooth surface material 17 can be adjusted. The screw bolt portion is removed after the grout material 28 is cured. The fixing bracket 17 a is a bolt or the like attached to the smoothing surface 17 so as to protrude downward from the lower surface of the smoothing surface 17. The fixing bracket 17a may be used by welding or bonding a plate-shaped block piece or the like to the smoothing material 17 in addition to the bolt.

  Then, a grout material 28 is injected from the injection hole 25 into the gap between the lower surface of the extended floor slab 16 or the smooth surface material 17 and the upper surface of the bottom slab 22 by the procedure described later, and the fixing bracket 17a and the height adjusting bracket 27 is inserted into the grout material 28 to integrate the smooth material 17 and the grout material 28, and the smooth material 17 is fixed to the bottom plate 22. In order to prevent the grout material 28 from penetrating into the bottom plate 22 and to ensure the fluidity of the grout material 28 on the bottom plate 22 before the grout material 28 is injected, For example, a primer treatment for applying a primer treatment material 33 such as an epoxy resin, an unsaturated polyester resin, or a vinyl ester resin material is performed.

  A fixed extension floor slab is connected to the tip of the extended floor slab 16 on the earthwork section 20 side via an expansion / contraction device 29. In addition, after the fixing extended floor slab grout material 28 is hardened, it is connected and fixed to the bottom plate 22 by anchor bolts 31. Then, the pavement surface 32 is continuously constructed from the bridge portion 10 to the earthwork portion 20 except for the portion of the expansion device 29.

  Here, the gap between the lower surface of the extended floor slab 16 and the upper surface of the bottom slab 22 is provided with an elastic waterstop 40 that surrounds the filling portion of the grout material 28 and prevents the grout material 28 from leaking outside. It is.

  Thus, after the extended floor slab 16 with the smooth surface material 17 temporarily fixed on the bottom surface 22 is arranged on the bottom plate 22 with the height adjusted by the height adjusting bracket 27, the extension floor slab 16 is inserted from the injection hole 25 of the extended floor slab 16. The grout material 28 is injected. Since the injected grout material 28 is subjected to primer treatment on the bottom plate 22 to prevent the grout material 28 from penetrating and to ensure fluidity, it flows on the primer treatment material 33 and extends to the extended bed. The gap between the lower surface of the plate 16 or the smooth surface material 17 and the upper surface of the bottom plate 22 is smoothly filled. At this time, the air in the gap is discharged outside from an air vent pipe (not shown) provided in the elastic waterstop 40. On the other hand, the grout material 28 is blocked by the elastic water stop zone 40 and does not leak outside the range surrounded by the elastic water stop zone 40.

  Therefore, the grout material 28 is filled in the gap between the extended floor slab 16 or the smooth surface material 17 and the bottom slab 22 with high density. As described above, since the fixing bracket 17a is suspended from the lower surface of the smooth surface material 17, the fixing bracket 17a is inserted into the grout material 28 on the lower surface side of the smooth surface material 17, and the grout The material 28 and the smooth surface material 17 are integrated and fixed. Further, since the extended floor slab 16 is made of precast and the lower surface is finished very smoothly, the grout material 28 is the lower surface of the extended floor slab 16 at the lower surface portion of the extended floor slab 16 that does not correspond to the smooth surface material 17. Is filled instead of the mold and cured. After curing, the anchor bolt 31 is connected to the bottom plate 22 and fixed. On the other hand, the portion corresponding to the smoothing material 17 becomes a sliding surface with very little frictional resistance by the contact between the smooth upper surface of the smoothing material 17 and the lower surface of the extended floor slab 16.

  Thus, on the road near the abutment as shown in FIG. 1, the grout material 28 and the smooth surface material 17 are integrally fixed on the bottom plate 22 made of existing or cast-in-place concrete, and the extended floor slab 16 and the slide plate A smooth sliding surface with little frictional resistance is formed between the upper surface of the face member 17. Therefore, when the bridge girder 11 expands and contracts due to the temperature change of the bridge portion 10 and the extended floor slab 16 is pushed and pulled, the extended floor slab 16 can move very smoothly with respect to the smooth surface material 17. Shrinkage due to temperature change can be smoothly absorbed by the expansion device 29. Moreover, when the smooth surface material 17 excellent in acid-water resistance is used, rust does not generate | occur | produce on a smooth surface, but a favorable intensity | strength and a sliding surface will be maintained over a long term.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The longitudinal section side view of the road near the bridge part concerning the present invention. 1 is a schematic longitudinal enlarged front view of a road near a bridge portion according to the present invention. FIG. 3 is an AA arrow view of FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Bridge part 11 Bridge girder 13 Abutment 14 Bridge floor slab 15 Connection part 16 Extension floor slab 17 Smoothing material 17a Fixing metal fitting 20 Earthworking part 21 Compacting embankment 22 Bottom slab 24 Anchor bolt 25 Injection hole 26 Temporary fixing metal fitting 27 Height adjustment metal fitting 28 Grout material 29 Telescopic device 30 Auxiliary floor slab 31 Anchor bolt 32 Pavement surface 33 Primer treatment material 40 Elastic waterstop

Claims (2)

A part of the bottom slab arranged on the road surface on the earthwork part side is received by the abutment, and an extended floor slab made of precast extending from the end on the bridge side to the earthwork part side is arranged on the bottom slab, In the road construction method in which an integrated pavement is constructed on the extended floor slab and the bridge,
A smoothing material made of a thin steel plate or a high-strength fiber panel with a fixing metal fitting suspended from the lower surface is disposed on the lower surface of the extended floor slab, and the sliding surface is previously removed from the upper surface of the extended floor slab. An injection hole that communicates with the lower surface of the face plate is provided, and an extended floor slab disposed on the bottom plate and a grout from the injection hole of the smooth surface material to a gap between the upper surface of the bottom plate and the lower surface of the smooth surface material A road construction method using a smooth surface material, wherein the fixing metal fitting and the grout material are integrated to form a smooth sliding surface by the smooth surface material on the upper surface of the bottom plate.   2. A road construction method using a smooth surface material according to claim 1, wherein primer treatment is performed to prevent penetration of the grout material between the surface of the bottom plate and the grout material and to ensure fluidity. .

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