JP3310949B2 - How to fill gaps in buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for filling gaps in a building, and more particularly, to filling a gap between joints between upper and lower structures of an extension girder of a bridge or between sections. The present invention relates to a method of filling a gap in a building, which fills a gap portion of a joint portion of the building as in the case of the above.

[0002]

2. Description of the Related Art In recent years, damage, wear, and aging of highway and other road bridges have been further promoted due to the increase in size of vehicles due to the relaxation of the Road Traffic Law and the rapid increase in traffic volume. The repair and reinforcement work has been forced. In addition, there is a strong demand for improvement of earthquake resistance as a countermeasure against large earthquakes, and it is urgently necessary to secure the strength of road bridges and to maintain them.

[0003] For this reason, it is necessary to perform some kind of reinforcement work on existing roads, including highways such as the Tomei Expressway, all over the arterial roads nationwide. Under circumstances.

When such reinforcement work is performed, it is extremely difficult from a financial or economic point of view to completely replace the existing bridge with a new bridge, and such a bridge is completely replaced. To do this, the road traffic before and after the bridge must be temporarily cut off for several months, but such a situation may not be practical in view of the current road traffic conditions and road administration. Impossible.

[0005] Therefore, in order to reinforce the existing bridge in order to cope with such a situation and to obtain a bridge having strength and reliability in accordance with the above-mentioned requirements, the existing bridge is maintained as it is while maintaining the existing bridge as it is. It is necessary to carry out partial rehabilitation and reinforcement work such as installation of additional girder.

[0006] In the case of performing a partial rehabilitation and reinforcement work such as installation of an additional girder on the existing bridge, more specifically, an additional girder is provided between the main girder of the existing bridge and the main girder. It is considered appropriate to increase the strength and to reinforce or repair the deteriorated floor slab itself.

[0007] These reinforcement works were previously performed by relatively small-scale construction methods, but in recent years, with the progress of civil engineering construction techniques and construction techniques, the bridges themselves have become longer and larger. Increasingly large scale.

Therefore, when the above-mentioned reinforcing girder is provided, the gap between the upper flange of the girder and the lower surface of the floor slab was about several centimeters in the past. At present, it has reached several tens of centimeters, which is exactly what the scale is.

In order to integrate the upper flange of such an additional girder with the floor slab, a filling material is filled in a gap at a joint between the upper flange and the lower surface of the floor slab. That is, a steel mold having a thickness of about 3 mm is fixed to both ends of the flange at an angle of 45 degrees or less with an anchor bolt, and a gap portion of the steel mold is sealed with a sealing material. The above gap is sealed using a sealing material as a sealing material.

[0010] A method is used in which a filling material is filled into a gap between the upper flange and the lower surface of the floor slab in one section having a maximum extension of about 8 m.

[0011]

However, even if the voids are filled with a filler such as mortar, the upper surface of the hardened filler may be damaged by vibrations and pressure changes generated by vehicles running on the road. It is not always in a state of 100% close contact with the lower surface of the floor slab, but rather 1 m.
A state in which a gap (or peeling or void) of m to several mm has occurred often occurs.

Further, as described above, since the girder spacing of the bridge tends to be longer, the amplitude of the vibration at the center thereof tends to be further larger, and the vehicle passing on the bridge is also larger. The size of the gap (or peeling or void) generated between the upper surface of the hardened filler material and the lower surface of the floor slab in the above-mentioned space depends on the thickness direction and the thickness of the filler. It tends to further increase in both main surface directions.

Furthermore, when a gap (peeling or void) of 1 mm to several mm is generated between the upper surface of the cured filler and the lower surface of the floor slab, this portion is substantially hollow. Since the stress due to the repeated load from the vehicle running on the road to the lower side of the floor slab concentrates especially on the structurally weak part where this cavity is generated, cracks tend to occur in this part Become. Even more seriously, if the state is left as it is, a destruction phenomenon may occur even in that portion due to, for example, an earthquake.

In addition, moisture such as rainwater which has infiltrated from the outside of the upper flange or the floor slab accumulates in the above-mentioned gap, and the accumulated moisture becomes a surrounding filler, cement, mortar, steel or the like of structural members. There is a problem that free lime, metal corrosion, and the like are generated, and the structural mechanical strength is significantly adversely affected.

Therefore, in order to solve the problem caused by the gap (peeling or void) of 1 mm to several mm generated between the upper surface of the cured filler and the lower surface of the floor slab, the above-mentioned filler and the like must be used. It is also conceivable to use a room-temperature fast-curing resin such as an epoxy resin as the above-mentioned filler, for example, as a filler having a lower viscosity coefficient and a higher quick-curing property.

However, such a room-temperature fast-curing resin such as an epoxy resin generally requires a complicated chemical manufacturing process, and the unit price per unit volume is extremely low because of quality control during the manufacturing and use. As described above, it is expensive to use a large amount of such expensive materials in the void portion of a bridge structure that is becoming larger and larger.
Since the cost of the method is significantly increased, it is not practically feasible.

In addition, a filler such as an epoxy resin is uniformly applied to the gap formed over a wide area in the gap between the upper flange and the lower surface of the floor slab in a large bridge in recent years, in particular, which is becoming longer and longer. Spreading is virtually impossible.

Alternatively, even if the filler such as an epoxy resin is not evenly distributed over the entire area of the joint between the upper flange and the lower surface of the floor slab, the epoxy resin is concentrated only on the portion where the load is most concentrated. It is thought that it is sufficient to fill the filler such as the above, but it is not always possible to reliably fill the gap at the designated position with the filler such as the epoxy resin.

Moreover, even when a room-temperature-curable resin such as an epoxy resin having a relatively low viscosity coefficient is injected, the gap (peeling or void) as described above is extremely complicated and irregular when the resin is injected. Due to the uneven distribution and the like, air bubbles are mixed and unfillable portions remain.

As described above, after the filler such as mortar is hardened, the filler made of a cold-setting resin such as epoxy resin is injected from the outside into the above-mentioned gap (peeling or void) of 1 mm to several mm. Even so, there is a problem that the room-temperature-curable resin as the filler does not reliably reach the complicated gap having an irregular position and thickness.
It is also conceivable to insert an elastic sheet having a thickness of, for example, about 1 mm into the gap. However, as described above, the gap and the thickness of the gap are irregular and complicated. It is practically impossible to insert such an elastic sheet.

Further, 1 mm generated at the joint surface between the lower surface of the existing floor slab and the mortar injected and hardened as described above.
In order to eliminate the gap of 1 to several mm, the abutment or pier is jacked up with a jack after the mortar is injected and hardened and cured, and the additional girder is raised, whereby the gap of 1 mm to several mm is obtained. The present inventors also studied a technique of eliminating the above.

However, such a jack-up is actually carried out by installing a jack at each pier portion of the additional girder and jacking up at each point of that portion. At the intermediate point between them, structural mechanical bending and torsion actually occur, so that a gap having a size larger than the above-described gap of 1 mm to several mm may be generated partially. It turned out that there was a problem. Therefore, even if such a measure of jacking up is used, the 1 m
It has been found that the gap of m to several mm cannot be eliminated.

As described above, in any of the conventional techniques, the gap (peeling or void) of 1 mm to several mm as described above is inevitably generated after the hardening of the filler. There has been the problem that the overall structural strength of the object is significantly adversely affected.

By the way, in a waterproofing method for a joint portion of a concrete structure, a hose is pre-installed at the joint portion, and after the concrete is cast and cured, the hose has a waterproof material. There is disclosed a method of injecting a liquid, causing the liquid to infiltrate around a hose, reacting with water, and stopping water by foaming (Japanese Patent Application Laid-Open No. 9-1990).
-4230). However, in this method, a resin material that reacts with water and foams must be used, so that the use is limited and the method is not suitable for civil engineering work. Therefore, there is a problem that the foaming area of the resin is in a very limited range and cannot be used in a wide range.

The present invention has been made in order to solve such a problem. For example, a gap formed at a joint between an upper flange and a lower surface of a floor slab in a bridge is filled more evenly with a gap generated over a wide range. Accordingly, it is an object of the present invention to provide a method for filling voids in civil engineering structures and other structures that can reliably and effectively realize strength reinforcement of civil engineering structures such as additional bridge girders.

[0026]

According to the present invention, there is provided a method for filling a gap in a building, comprising filling a gap between a first building and a second building with a filler. In the step of previously arranging a filling bag band in the void portion,
A step of filling the void portion with a first filler and curing the first filler, and after curing the first filler, injecting a second filler from the outside into the filling bag band. the first of the gap portion of the front dangerous creation through the filling Fukuro
And a second filling step of filling the remaining gap portion where the first filling material has not been filled with the second filling material , wherein the first bag is filled with the first filling material . filling
The second filler is made of a material different from the first filler without penetrating the material.
Formed into a flat sack band using a material that can penetrate the filler
And a bag formed by the outer skin layer.
The second filler is passed through the belt while the outer
The outer skin layer that penetrates and diffuses into the skin,
Wrapped to form a shape in a thickness direction and a planar shape of the bag band.
And a lattice-shaped core material layer for holding.
Of the filler from the outside of the bag band to the inside of the bag band
Filling bag with an insertion opening through which the conduit to be inserted is inserted
And it is characterized in the use of the band.

In the above method for filling a gap in a building , the leading end of the conduit is inserted into the gap filling bag band.
Is formed as a flat tube so as to allow the
At least one opening on the side of the flat tubular tip
The rear end opposite to the front end is formed in a cylindrical shape.
And the second filler is supplied from outside the
The flat tubular tip and front so as to be able to conduct to the inside of the sac
A serial cylindrical rear end is characterized in the this <br/> using conduit successive tubular.

Further, in the above-mentioned method for filling a gap in a building, a filler having a lower viscosity than the first filler is used as the second filler. Is the way.

[0029]

[0030] In the above method for filling a gap in a building, the conduit may be provided at least two per filling bag band.
And at least one of the conduits is connected to the second
Used as an injection pipe for injecting the filler, and at least one other of the injection pipes is used as an air vent pipe for injecting the second filler, and the second pipe is pressed in a one-sided manner. A method for filling a void in a building, characterized by injecting a filler.

That is, the second gap filling material is injected until the second gap filling material flows out of the conduction pipe used as the air vent pipe. The material can be reliably injected.

Further, in the above-mentioned method for filling a gap in a building, a room-temperature-curable resin is used as the second gap filling material.

Further, in the above-mentioned method for filling a gap in a building, the room-temperature curing type (meta) may be used as the second gap filling material.
A method for filling a void in a building, characterized by using an acrylic resin.

[0034]

[0035]

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the method for filling voids in civil engineering structures according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an example of an expressway bridge provided with an additional girder portion to which the technology of the present invention is applied. FIG. 2 is a sectional view taken along the line AA ′ of FIG.
FIG. 3 (a) shows the connection between the additional girder upper flange and the lower surface of the floor slab using a hardened mortar as the first filler and an acrylic resin as the second filler in the portion B of FIG. FIG. 3B is a cross-sectional view showing a state in which the gaps between the fillers are filled, and FIG. 3B is a sectional view of FIG. It is sectional drawing which shows the state which filled the space | gap part between the extension girder upper flange and the floor slab lower surface.

This highway bridge, as shown in FIG.
It has a general bridge structure as a whole and includes piers 1a, 1
b, 1c,... 1g and a so-called upper structure 2 composed of an upper pavement layer, a roadbed, a subgrade slab, and the like supported by flanges (not shown) by the piers 1a. Is configured.

The section taken along the line AA 'in FIG.
It has a schematic configuration as shown in FIG. That is, pier 1
Above the steel girders 3 (3a, 3c) including additional girders 3b, 3c.
b, 3c, 3d...) are arranged in a row.
The upper structure 2 is supported by the upper flange.

In FIG. 2, a portion denoted by reference numeral B is a floor slab 4 and a first filler 5 on a lower surface thereof, as shown in an enlarged manner in FIGS. 3 (a) and 3 (b). And an additional girder 3 having an upper flange 7 and a web (vertical girder) 8 for supporting the lower surface of the floor slab via the second filler 6, a lower surface of the floor slab 4 (ie, a lower surface of the floor slab) and the upper flange 7. Anchor bolts 9a and 9b for fastening the second filler 6 and a conduction pipe 10 used as an injection pipe and an air release pipe when filling the second filler 6;
Injection pipe 11 used for filling the first filler 5
And a gap between the lower surface of the floor slab and the upper flange 7
Forming iron plates 12 and 13 used when filling the filling material 5 and the second filling material 6 of the first embodiment, and the first filling material 5 and the second filling material from the ends of the forming steel plates 12 and 13. A sealing material 14 made of epoxy resin for sealing the periphery of the floor slab 6 so as not to leak, and a lower surface of the floor slab which is used at the time of filling the second filler 6 even after the filling process is completed. The main part is constituted by the filling bag band 15 left in the.

With respect to such a structural state of the completed joint, it is particularly remarkable that in the prior art, the distance between the upper surface of the first filler 5 after curing and the lower surface of the floor slab is 1 mm to 3 m.
A gap in the thickness direction of about m or more has occurred in an area ratio of 7 to 9% of the entire area. However, such a conventional gap in the thickness direction is formed by using the technique of the filling method of the present invention. In this way, the second filler 6 can be evenly filled.

As can be seen from FIGS. 3 (a) and 3 (b), the additional girder fitting portion of the B portion and the additional girder fitting portion of the C portion are interchanged symmetrically left and right. The basic structure is similar. Needless to say, this is because the roadbed slab of the highway has a slope on the road surface due to drainage efficiency and the like, and the slope is symmetrical between the up and down routes. However, it goes without saying that the technology of the method for filling voids in civil engineering structures according to the present invention is not limited to only filling the voids in such inclined portions. In addition to this, for example, a substantially horizontal gap portion between the flat floor slab having almost no inclination in cross section and the upper flange, such as a floor slab of a roadbed in a straight section of a high-speed railway, and the like. The technique of the present invention can be suitably used also in the case of filling a void portion having such a structure.

Next, the gap between the lower surface of the floor slab and the upper surface of the upper flange, whose main structure is shown in FIG. 3, is filled with the first filler and the second filler by the filling method according to the present invention. The main part of the filling method for filling with the filler will be described in detail.

FIG. 16 is a flow chart showing an example of main construction steps in the case where the filling method according to the present invention is applied to the above-described reinforcement work for an additional girder on a highway.

Before the actual construction, first, as an investigation before the construction work, ie, a girder composite construction work, the expected unevenness of the floor slab, the type of work, etc. are investigated (step 1; abbreviated as s1, hereinafter the same). ).

Subsequently, before the extension girder is erected, the place where the girder combining process on the lower surface of the floor slab 4 is to be performed is preliminarily performed by a disk sander, a wire brush, or the like in a floor slab lower surface kerning step. Further, at this stage, a repairing process is performed for a deep crack reaching the lower surface of the pavement (s2).

Then, an additional girder 3 is erected as an additional girder erection work (s3). At this time, it goes without saying that a bearing installation work, a bearing base grouting work, and the like are also performed.

Subsequently, as a girder combining machine, first, in accordance with the drawing, blacking is performed on the lower surface of the existing floor slab and the upper girder upper flange 7, the girder combining member is carried in, and transported to a predetermined mounting position using a jib crane or the like (s4). ).

After completion of the installation of the additional girder, as a concrete anchor installation work, holes are made in the lower surface of the existing floor slab using a hammer drill, and the anchor bolts 9a and 9b are driven in (s5). Needless to say, the anchor bolts 9a and 9b are constructed so as to sufficiently withstand the pressure at the time of injecting (press-fitting) the rapidly hardened mortar as the first filler 5 in a later step.

Subsequently, as a filling bag band attaching work, a conducting tube 10 and a vinyl hose 16 which is an extension hose thereof are attached to both ends and a central portion of the filling bag band 15 and attached to a desired position on the lower surface of the floor slab 4. (S6). The filling bag band 15 may be bonded using a quick-drying adhesive such as Bond G17 (trade name), or may be bonded using a glue gun or the like.

The position where the filling bag band 15 is attached may be, for example, a position after the first filling material is hardened, such as a central portion of the connecting portion or a position near the upper part of the lower surface of the floor slab. Position where the second filler is expected to tend to remain most easily as a gap, a position where the second filler can be most effectively diffused and filled into the remaining gap evenly, It is desirable to install at the position where the stress is applied most.

It goes without saying that this filling bag band attaching work (s6) may be performed before the concrete anchor attaching work (s5).

Subsequently, the steel partition plate is mounted (s7) and the formwork iron plates 12, 13 are mounted (steel formwork mounting step; s8).

Thereafter, as a sealing work, using a gold spatula iron, etc., sealing is performed using a sealing material in the vicinity of the position where the conduit tube 10 is arranged or in a place where the filler is expected to leak. (S9). In the sealing with the sealing material, the construction and materials must be selected so that a reliable sealing force (adhesive force) can be obtained so as to sufficiently withstand the injection pressure when the first filler is injected in a later step. Needless to say, this must be done.

Subsequently, after the receiving state of the filler is adjusted, the first filler 5 is injected from the injection pipe 11 (s10).

As the first filler 5, a hardened mortar is used.

In filling the quench hard mortar as the first filler 5, the mortar was first mixed with a mixer.
After kneading for more than one minute, the mixture is injected into the gap from the injection pipe 11 using a mortar pump within 20 minutes. At this time, grouting is performed for a length of about 5 to 7 m (that is,
(3 units of length 2 and 13) is partitioned as one section, and in each section, the mortar is continuously poured by a single-push method before the mortar hardens. Then, after it is confirmed that the mortar flows out from an air vent pipe (not shown) previously set at the top end, the injection of the first filler 5 is completed. Alternatively, since the volume of the void portion to be filled can be calculated in advance, mortar having a volume of 95% or more of the calculated volume of the void portion is prepared in advance, and this is injected as the first filler 5. You may do it.

After the injection of the first filler 5 is completed, natural curing is performed for about 3 to 4 days in accordance with the characteristics of the material (s12).

Subsequently, after the hardening of the first filler 5 has been completed and its initial strength has been confirmed, the second filler 6 is filled in the gap left unfilled with the first filler 5. Acrylic resin which is a room temperature curable synthetic resin
Fill with 5. By the second filling, the gap remaining without being filled with the first filling material 5 can be almost uniformly filled with the second filling material 6. In addition, at this time, even with respect to the problem of water tightness, even if cracks are generated on the lower surface of the floor slab, a low-viscosity cold-setting synthetic resin such as an acrylic resin is used as the second filler 6. Since the second filler 6 penetrates into the cracks on the lower surface of the floor slab and closes the cracks, it is possible to automatically repair such cracks on the lower surface of the floor slab at the same time. In addition, the waterproof effect and the like can be further improved.

The room temperature curing type (meta) of the second filler 6
In the present embodiment, the acrylic resin is a wet surface /
Oil surface adhesion is possible, viscosity coefficient 50cps, pot life 54
Hard Rock II, DK, manufactured by Denki Kagaku Kogyo Co., Ltd.
530-0005 (product name and code name) is preferably used. The room-temperature-curable (meth) acrylic resin of the second filler according to the present invention is a room-temperature-curable synthetic resin having the characteristics of having a low viscosity and a short curing time as in the case of Denka Hard Rock II. Any resin other than Denka Hard Rock II can be suitably used.

After filling the second filler 6 in this way, natural curing for several hours to about 3 days is performed in accordance with various conditions such as the average curing time of the second filler 6 (s13).
The portion where the conduit 10 protrudes outside from the fitting portion is cut off. Also, during the construction work, remove any extra filler that has adhered to the steel plate or concrete of the structure of the building using a wire brush, etc., taking care not to damage the surface to which it is attached. Do (s1
4).

As described above, the main part of the step of filling the void portion of the civil engineering structure can be performed, and the void portion can be effectively and reliably filled with the first filler and the second filler. The filling effect will be described in more detail in an experimental example described later.

Next, the structure, material, and function of the second filling bag band 15 and the conduit tube 10 used in the method of filling the void portion of the building according to the present invention as described above will be described in detail. .

As shown in FIGS. 4 and 5, the filling bag band 15 is formed of a bag band-shaped outer skin layer 151, a core material layer 152 contained therein, a thickness as a whole, and a bag band formed by the outer skin layer 151. The main part is constituted by a fine lattice layer 153 (not shown in FIG. 4) used for adjusting the volume and the structural strength and flexibility of the entire filling bag band 15. One conducting tube 10 as shown in FIG. 6 is inserted into each of the both ends and the center of the bag-shaped longitudinal direction.

For reference, the outer dimensions of the filling bag band 15 are shown in FIG. In addition, this filling bag belt 15
The weight per bag is about 50 g.

In FIG. 4, the core material layer 152 is formed of the filling bag band 1 in order to facilitate understanding of the structure of the filling bag band 15.
Although the outer skin layer 151 is formed in a sack band shape so as to include the core layer 152 and the like, the core layer 152 is actually formed as a filling layer. It is needless to say that the bag 15 is not visible from the outside of the bag.

The filling bag band 15 is composed of a bag band-shaped outer skin layer 151 as shown in FIG. 5 and upper and lower layers, and a core material layer 152 and a fine grid layer 153 contained therein.
The outer layer 151 is a non-woven fabric having a fine fiber mesh and not coated with a thickness of 0.5 mm or less, and is made of a hardened mortar or cement paste used as the first filler 5 in the present embodiment. Formed in a bag band using a polyester-based nonwoven fabric having a property of penetrating a low-viscosity room-temperature-curable resin such as an acrylic resin as the second filler 6 without penetrating mortar or the like. I have. This non-woven fabric does not allow the first filler to penetrate, while the second filler has a material and a coarseness of fibers that allow the first filler to penetrate. It goes without saying that it is not limited.

Then, the outer skin layer 15 formed in the shape of a bag band is formed.
1, a core layer 152 and a fine lattice layer 153 are included inside the bag band.

In this embodiment, the core layer 152 is
2 mm thick formed in a grid of 0 mm x 10 mm mesh
The following polyester nets can be suitably used.
The characteristics required of the core layer 152 are as follows.
If the thickness is not less than mm, the second filler such as a synthetic resin which is expensive is required in a large amount, which is disadvantageous in that it is uneconomical. Therefore, the thickness of the core layer 152 is desirably 2 mm or less. However, the present invention is not limited to this. When the gap portion, which is the unfilled portion of the first filler, is relatively large, such as 2 mm to 5 mm, it is desirable to use the core material layer 152 having a thickness suitable for it. This is because the amount of the second filler such as an expensive synthetic resin can be saved.

If the core layer 152 is too weak mechanically, the first filler 5 is partially turned up due to its fluid pressure when the first filler 5 is press-fitted, and the adhesion is released. In some cases, inconveniences such as being dislodged from a desired mounting location may be caused. Therefore, mechanical strength and flexibility are required to such an extent that such inconvenience does not occur.

Further, the fine lattice layer 153 is
Overall thickness and mechanical strength (including rigidity)
This is preferably used when fineness or flexibility cannot be finely adjusted only by the core layer 152. Therefore, when there is no such necessity, the fine lattice layer 153 may be omitted. Or, conversely, a plurality of fine grid layers 15
Needless to say, it is also possible to adjust the thickness to a more suitable thickness by using No. 3.

If the size of the mesh of the core layer 152 and the size of the fine grid layer 153 are too small, the second filler 6 is conducted to the inside of the bag of the bag 15 for filling. In this case, the fluid may have a large fluid resistance that hinders the flow of the second filler 6, so that it is necessary to make the mesh fine enough to prevent such inconvenience.

The conduit 10 has the overall shape shown in FIG.
6 (a), a tip portion which is a portion to be inserted into the filling bag band 15 is a flat shape having a thickness of 2 mm similar to the thickness of the filling bag band 15 as shown in FIG. 6 (b). The root portion is formed in a tubular shape as shown in FIG. 6 (c). The conduit 10 and the discharge hole 1
Needless to say, it is desirable to set the size and shape of 01 so that the second filler 6 can be smoothly conducted. The main dimensions of the conduit tube 10 used in this embodiment are shown in FIG. 6A for reference. The discharge hole 101 at the tip was 2 mm in diameter.

The filling bag band 15 and the conduit tube 10 having the above-described structures are arranged along the longitudinal direction of the upper flange 7 and the floor slab 4 of the additional girder along the longitudinal direction of the upper structure 2.
For example, they are arranged on the lower surface of the floor slab 4 in an arrangement as shown in FIG. In FIG. 7, a short filling bag band 15 ′ is arranged between adjacent filling bag bands 15, but it is arranged so as to be adjacent to each other without providing a gap between the adjacent filling bag bands 15. May be arranged in a row. Conversely, it is not preferable to provide a gap between adjacent filling bag bands 15.

Next, the second filling method using the filling bag band 15 and the conduit tube 10 as described above will be described in more detail.

The filling bag band 15 has a maximum of 4 to
A maximum of five sheets, that is, a length of about 7500 mm to 9500 mm is defined as one section, and 15 sections from both ends thereof.
As shown in FIG. 8, it is desirable that the ends of the filling bag bands 15 adjacent to each other with a distance of about 0 mm are continuously arranged adjacent to each other as shown in FIG.

Room temperature curing type (meta) as the second filler 6
The procedure for filling the acrylic resin filler will be described with reference to FIG. 8. First, using the conductive tube 10 a as an injection tube, the second filler 6 is injected from the conductive tube 10 a while the conductive tube 10 b and the conductive tube 10 b are connected. The injection is continued while the air is evacuated using the pipe 10c as the air bleeding pipe.

When overflow of the second filler 6 is confirmed from the conduits 10b and 10c, the conduit 10c is used as an injection tube, while the conduit 10c is used.
d, Injection is continued while air is evacuated using the conduit 10e as an air bleeder. When overflow of the second filler 6 is confirmed from the conduits 10d and 10e, the conduit 10e is used as an injection tube, while the conduits 10f and 10g are used as air bleeders. Do. Then, the gap is filled with an acrylic resin filler as the second filler 6 by sequentially performing the left-to-right operation in the drawing by such a single-push method. Then, when the second filler 6 has been injected from all the conduits from the conduit 10a to the conduit 10l, finally, the second filler 6 is again injected into the substantially central conduit 10f, and the conduits 10a and 10l are finally filled.
When the overflow from 1 is confirmed, it is determined that the filling is completed.

In this way, the second filling material 6 is reliably conducted to the filling bag band 15 without causing any remaining air bubbles or unfilled portions, and the second filling material 6 flows from the filling bag band 15 to the periphery thereof.
Of the second filler 6 can permeate / outflow and diffuse, and the second filler 6 can be spread evenly around the surrounding gap. In addition, the fact that the second filler 6 has been completely distributed is confirmed by the second conducting tube used as the air vent tube.
Can be confirmed by overflow of the filling material 6, so that more reliable filling of the gap can be realized.

A void filling test is performed to fill the void portion of the civil engineering structure using the filling bag band 15 as described above, and the details of the function of the filling bag band 15 and the function and effect of the construction method using the same are described. It was confirmed. Therefore, next, the void filling test using the technique according to the present invention and the results obtained thereby will be described in detail.

First, FIG. 9 is a cross-sectional view taken along line EE ′ and FIG. 10 is a plan view similar to a gap portion of a joint portion between the lower surface of a floor slab of an actual highway and the additional girder upper flange. A mock-up having a structure as shown in the drawing is prepared, and a filling bag belt 15 is installed in the mock-up in a state as shown in FIGS. 9 and 10 so that vibrations and irregularities caused by vehicle traffic on an actual highway are obtained. Conditions for applying a repeated load or the like are artificially created by using an external vibration generator, and when the first filler 5 is filled, air is intentionally mixed in from the inlet, and the first filler 5 After hardening of 5, an experiment was conducted in which gaps and bubbles were frequently generated between the upper surface of the first filler 5 and the lower surface of the floor slab, and then the second filler 5 was injected and hardened. Was.

The filling test mold 901 has an outer dimension of 4000 mm in length, 800 mm in width, and 100 mm in thickness (gap), and the upper surface thereof is used to observe the filling state of the first filling material 5 and the second filling material 6. A transparent acrylic plate 17 was used as much as possible.

When installing the formwork, the camber girders 18a and 18b are inserted on one side so as to be in the same state as the floor slab of an actual highway, and the height of the slope is 60 mm between the horizontal directions. That is, a camber) was provided. That is, the gradient of this camber is 8.57%.

The length of the bag bag 15 for filling is about 2 m, and the mounting position thereof is provided in two cases, that is, at the end of the form and at the center of the form. The conduit 10 has an injection pipe and an air vent pipe each having a length of 1 m.
They were arranged at intervals. First, the first filler 5 was filled. As the first filler 5, a conventional general quick-hardening mortar used by mixing with a hand mixer was used. The kneaded mortar was injected using a mortar pump at a pumping speed of about 1 cubic meter / Hr. At the time of this injection, air bubbles were intentionally mixed and vibration was given from the outside, so that a gap was generated between the upper surface of the cured first filler 5 and the lower surface of the floor slab.

After the first filler 5 is cured, a 1500 ml syringe SM-818 AG is used as a special injection gun.
Using -1,500, the above-mentioned DENKA HARDLOCK II DK-530-005S as the second filler 6 was injected into the gap through the filling bag band 15. At this time, the discharge pressure of the special injection gun was 2 to 5 kg / cm ² . In this way, the above-mentioned Denka Hard Rock II DK-530-005S is injected as the second filler 6, and the injection state is visually observed, and the flow of the resin is measured at regular time intervals by the acrylic plate 17. Recorded above and recorded.

The injection result obtained by recording in this manner is
FIG. 11 (filling bag band 15 is arranged at the center) and FIG.
(The filling bag band 15 is arranged at the end). In the figure, the second filler 6 is conducted substantially in the direction from top to bottom. As can be seen from FIGS. 11 and 12, the second filler 6 penetrates from the outer skin layer 151 to the outside while conducting in the filling bag band 15 (that is, while passing through the filling bag band 15). It was confirmed that the effluent flowed out, and further diffused almost 100% to the surroundings (particularly in the horizontal direction in the figure). That is, the filling rate of the first filler 5 is 90.4%.
Was changed to the second filling material 6 using the filling bag band 15.
Was diffused into the surroundings while conducting, and it was confirmed that the remaining 9.6% (that is, about 10%) of the gap was completely filled by 100%.

In both cases where the filling bag band 15 is arranged at the center and at the end, the filling time of the second filling material 6 is 11 to 12 minutes, and there is almost no significant difference. Was.

From the above test results, it was confirmed that the filling bag band 15 according to the present invention and the filling of the fitting portion and the like can be reliably performed using the same.

Note that, by using the technique according to the present invention, FIG.
As shown in (1), it is also possible to simultaneously use the steel plate crimping method at the lower part of both sides of the additional girder (the inner main girder). Here, in FIG. 13, 1301 is a shoe seat, and 1302 is a steel plate. As for other parts, the same parts as those in FIG. 3 described above are denoted by the same reference numerals.

Further, as shown in the perspective view of FIG. 14, the conducting tube 10 has a short cylindrical portion 1001 which is divided into a portion simply used for connection with a vinyl hose 16 which is an extension hose. By making the length almost equal to the flat portion 1002, which is an insertion portion, the function for establishing conduction between the outside and the filling bag band 15 may be reduced as it is. Alternatively, in a case where the installation position of the filling bag band 15 is a deep portion, it is required that the flat portion 1002 be longer than in the above embodiment. In such a case, Needless to say, it is necessary to provide the flat portion 1002 with a length that can be adjusted to the depth of the installation position of the filling bag band 15.

When the filling bag band 15 is attached (adhered) to the lower surface of the floor slab, the position where the adhesive or the grease gun is applied is, as shown in FIG. 1 on the periphery
It may be arranged at intervals of 00 mm.

In the above-described embodiment, the technique of the present invention is used for filling the gap between the upper flange and the floor slab (ie, in the vertical direction) in the viaduct of the highway or the supplementary girder of the river bridge. Although an example of the use of the joint is shown, the technique of the present invention is also used to fill gaps between joints and joints between sections (ie, in the horizontal direction) of a section of a reinforced concrete floor slab such as a road or a railway floor. It can be suitably applied to repair and repair.

[0093] In addition, it is necessary to reliably fill a portion of a building or a joint of a building where a gap is particularly likely to be formed, for example, a portion of a building where a joint is formed over a large area and where a gap is likely to be formed. The present invention can be particularly suitably applied when is required.

Further, if the minimum value of the gap is 1 to 3 mm or more and the gap or crack has a relatively linear pattern, the filling bag band 15 according to the present invention is inserted into the gap or crack from the outside. It is also possible to insert and inject only the second filler 6 into the portion, and to suitably perform the filling repair of the portion.

[0095]

As described above in detail, according to the present invention, the gap formed over a wide range in the void portion of a building, such as the joint portion between the upper flange and the lower surface of the floor slab, is uniformly filled. As a result, it is possible to provide a method for filling a gap in a building, which can surely and effectively realize strength reinforcement of a building such as an additional girder of a bridge. Moreover, it is not necessary to use an expensive filling material, and the filling material can be leached over a wide range only by partially attaching the filling bag band, so that the economical and technical effects are large.

[Brief description of the drawings]

FIG. 1 is a partially omitted side view showing an example of an expressway bridge having an additional girder portion that is added by applying the technology of the present invention.

FIG. 2 is a cross-sectional view taken along line AA ′ of an example of a highway bridge including an additional girder portion that is added by applying the technology of the present invention.

FIG. 3 is a cross-sectional view showing a state where a gap between an additional girder upper flange and a floor slab lower surface is filled.

FIG. 4 is a view showing a structure of a main part of a filling bag band 15;

FIG. 5 is a diagram showing an outline of a layer structure (internal structure) of a filling bag band 15;

FIG. 6 is a view showing a conduit tube 10;

FIG. 7 is a view showing an example of a case where a filling bag band 15 and a conduit tube 10 are arranged and arranged along the longitudinal direction of the upper flange 7 and the floor slab 4.

FIG. 8 is a view showing an example of a case where the end portions of the filling bag band 15 are continuously arranged adjacent to each other as shown in FIG.

FIG. 9 is an EE ′ cross-sectional view showing a mock-up used for a void filling test using the technology according to the present invention.

FIG. 10 is a plan view showing a mock-up used for a void filling test using the technology according to the present invention.

FIG. 11 is a diagram showing a result of injecting a second filler in a void filling test using the technique according to the present invention.

FIG. 12 is a diagram showing a result of injecting a second filler in a void filling test using the technology according to the present invention.

FIG. 13 is an additional girder (inner girder) using the technology according to the present invention.
It is a figure which shows an example at the time of simultaneously using the steel plate crimping method of the lower part of both side floor slabs.

FIG. 14 is a diagram showing an outline of a short conduction tube 10 in which a cylindrical portion 1001 is formed only to a necessary minimum.

FIG. 15 is a diagram showing a position where an adhesive or a grease gun is applied when the filling bag band 15 is attached (adhered) to the lower surface of the floor slab.

FIG. 16 is a flowchart showing an example of main construction steps in a case where the filling method according to the present invention is applied to reinforcement work of an additional girder on a highway.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bridge pier 2 Superstructure 3 Steel girder 4 Floor slab 5 First filler 6 Second filler 7 Upper flange 8 Web 9 Anchor bolt 10 Conductive pipe 11 Injection pipe 15 Filling bag belt

──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Keiichi Kosuge 3-5-1 Asahimachi, Machida-shi, Tokyo Denki Kagaku Kogyo Co., Ltd. Central Research Laboratory (72) Inventor Toshihiro Ando 3-5-Asahicho, Machida-shi, Tokyo No. 1 Inside the Central Research Laboratory, Denki Kagaku Kogyo Co., Ltd. (72) Kazuo Nakano 1-13-15 Kita Otsuka, Toshima-ku, Tokyo Miyachi Construction Industry Co., Ltd. (56) References JP-A-63-35998 (JP) JP-A-9-4230 (JP, A) JP-A-11-13023 (JP, A) JP-A-6-307195 (JP, A) JP-A-3-8998 (JP, A) 3-47961 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01D 21/00 E01D 22/00 E04G 21/02 103

Claims (6)

(57) [Claims] 1. A method of filling a void in a building, in which a filler is filled in a void between a first building and a second building, a step of previously disposing a filling bag band in the void. Filling the void portion with a first filler and curing the first filler, and after curing the first filler, injecting a second filler from the outside into the filling bag band. Through the filling bag band
In the first filling step of the gap portion of the dangerous creatures and a second filling step of filling the second sealing member to the remainder of the gap portion of the first filler were unfilled , As the filling bag band, the first filler is not impregnated
Infiltrate a second filler made of a different material from the first filler
The outer skin layer is formed in a flat bag band shape using the material to be
And the second layer is formed in the bag formed by the outer skin layer.
To the outside of the outer skin layer while conducting the filler
An outer skin layer to be covered, and the bag enclosed in a bag band of the outer skin layer.
Lattice shape that maintains the shape in the thickness direction and planar shape of the band
Core material layer, and the second filler is
A conducting tube for conducting from the outside of the sash to the inside of the sash is
Using a filling bag band with an insertion opening formed
A method for filling voids in a building, characterized by the following. 2. The end of the conductive tube is filled with the gap.
It is formed as a flat tube that can be inserted through the bag
And at least an opening in the side surface of the flat tubular tip portion
The rear end opposite to the front end is cylindrical
And the second filler is provided outside the bag band.
Part of the flat tubular so as to be able to conduct from the
A tubular conducting tube having a front end portion and the cylindrical rear end portion continuous with each other.
2. A space in a building according to claim 1, wherein
Filling method. 3. The first filler as the second filler.
Uses filler material with lower viscosity than filler material
The method for filling a void in a building according to claim 1. 4. The method according to claim 1, wherein the conducting tube is connected to each of the filling bags.
At least two or more tubes are provided, and at least one of the conduits is provided.
Is an injection pipe for injecting the second filler, Used
And at least one other of the injection tubes is connected to the second
Used as an air vent tube when injecting
Wherein the second filler is injected in a predetermined manner.
A method for filling a void in a building according to any one of claims 1 to 3.
Law. 5. The room-temperature curing as the second gap filling material.
5. The method according to claim 1, wherein a mold resin is used.
A method for filling a void in a building according to any of the claims. 6. The room-temperature curing as the second gap filling material.
Using a mold (meth) acrylic resin
A method for filling a void in a building according to any one of claims 1 to 4.
Law.