JP6538478B2 - Gap filling method - Google Patents

Description

  The present invention relates to a clearance filling method, and more particularly to a clearance filling method for filling a clearance generated between a ground frame and a frame structure such as a legal frame installed on a slope.

  Conventionally, as one of the construction methods for reinforcing and strengthening the slope, it has been practiced to set a legal or concrete scale on the slope. By placing the legal framework, which is a heavy material, on the ground of the ground and fixing it with an anchor or the like, it is possible to prevent landslide disasters, collapse of the ground, and the like.

  However, as time passes, a gap may occur between the lower surface of the legal frame and the ground on the slope. In particular, with the flow of rainwater and spring water, the soil on the surface of the ground is scraped off, and irregularities, water (water) and gully erosion are formed on the surface of the slope.

  In such a case, the legal framework floats from the legal ground and can not transmit sufficient retaining force to the ground. In addition, water may further flow down with the earth and sand from the generated gap, which may further promote the expansion of the gap.

  For example, Patent Document 1 discloses a method of filling a depression made in a ground with a cellular curing agent and shaping the ground. Further, Patent Document 2 discloses a material of a filling material to be filled in a void portion such as a tunnel lining rear surface.

Unexamined-Japanese-Patent No. 2-91320 JP 2004-263426 A

  The gap between the legal framework installed on the slope and the slope of the slope is urgently required to ensure the stability of the slope by transmitting the retaining force to the slope and to prevent the expansion of the clearance. Need to be closed. However, the one disclosed in Patent Document 1 is to fill the depression of the ground surface with a hardening agent, and the one disclosed in Patent Document 2 is to fill the void in the lining of the tunnel with a filler. It is a thing. Therefore, it is difficult to apply these measures to a method of filling a filler in a gap between a slope and a legal frame.

  The filling of the gap between the slope and the legal frame is difficult because the work area is a slope, and it is also necessary to ensure the safety of the workers. It is necessary to reliably perform the filling operation in a simple process in a short time. Furthermore, high durability is also required because the filling point is exposed to wind and rain.

  The main problem to be solved by the present invention is to provide a gap filling method capable of reliably closing the gap between the frame structure on the slope and the slope in a simple process and in a short time. is there.

  The present invention which solved this subject is based on the following purports.

[Purpose 1]
Spraying a liquid agent in a gap formed between the frame structure placed on the slope and the slope when the slope is at least partially depressed;
Filling the foamed material into the clearance from the lower side or the upper side of the slope of the slope;
A clearance filling method, which comprises, after the filling step, performing a waterproofing step of applying a waterproofing treatment to the surface of the foam material.

[Purpose 2]
After the filling step and before the waterproofing step, a surface roughening step may be further performed to roughen the surface of the foam material exposed to the outside from the gap portion.

[Purpose 3]
Before the filling step, a wall member for suppressing the expansion of the foam material to the lower side of the slope along the frame structure so as to cover the gap on the lower side of the slope of the slope Further execute the placement process of placing
The wall member may have at least one through hole for filling the foam material from the outside to the inside of the gap.

[Purpose 4]
The foam material may be a two-component mixed urethane foam.

[Gist 5]
The solution may be an asphalt emulsion, a polyurea resin solution or a polyurethane resin solution.

[Purpose 6]
The waterproofing step may be a coating step of a synthetic resin paint.

  Further objects or other features of the present invention will be made clear by the preferred embodiments described below with reference to the accompanying drawings.

  According to the present invention, the gap between the frame structure on the slope and the slope can be reliably closed in a short time in a simple process. Moreover, the filling part can be made highly durable.

It is a figure for demonstrating the clearance gap filling method which concerns on embodiment. It is a flow chart of the crevice filling construction method concerning an embodiment. It is a figure for demonstrating an arrangement | positioning process. It is a figure of the lower piece vicinity after a filler hardened. It is a figure of the crevice part vicinity after crevice filling construction method construction concerning an embodiment.

[Overall description]
Hereinafter, embodiments of the present invention will be described. FIG. 1 is an explanatory view for explaining a gap filling method according to an embodiment of the present invention. Fig.1 (a) is a fragmentary sectional view of the state which looked up on the slope F from slightly downward, and FIG.1 (b) is a side view of Fig.1 (a). On the slope F, a legal frame 1 as a frame structure is installed. The legal framework 1 is a rectangular frame structure made of concrete or mortar, and placed on the slope F and fixed by an anchor in order to reinforce the slope F to prevent landslide disasters and falls. There is. Although various shapes can be considered as a shape of the legal frame 1, this embodiment demonstrates the rectangular legal frame 1 which has four sides. In FIG. 1, the lower side 2 of the legal frame 1 placed on the slope F is shown. The lower side 2 extends to the left and right so as to be substantially orthogonal to the inclination direction of the slope.

  A gap portion (gap) G is generated between the lower side 2 and the slope F. At the time of installation of the legal frame 1, there are few irregularities on the surface of the slope F and no gap G is produced, but after installation of the legal frame 1, a part of the slope F is sunk with the passage of time. G occurs. Various causes can be considered as the causes of the gap G. For example, it is conceivable that a gap G is generated due to a partial depression of the slope F due to the vibration of the surrounding area or the influence of groundwater. In addition, it is conceivable that the earth and sand on the surface of the slope F is partially scraped off by the wind and rain to create a gap G.

  When the gap portion G is generated, the contact area between the legal frame 1 and the slope F becomes small, and the legal frame 1 becomes unstable. Moreover, depending on the generation | occurrence | production location of the clearance gap part G, a part of anchor which fixes the formal frame 1 on the slope F will be exposed. That is, the reinforcement strength of the slope F by the foremost frame 1 is reduced by the generation of the gap G. In the state in which the gap G is generated, water such as rainfall passes the gap G and further discharges the soil on the surface of the slope F to the downstream, and the gap G is further enlarged. Therefore, if the gap G is created on the surface of the slope F, it is a good idea to close the gap G immediately.

[Procedure for filling the gap G]
A clearance filling method for closing the clearance G will be described based on the flowchart of FIG. First, at the site, a survey process is conducted to survey the inside of the gap G and the periphery thereof (S1). By this investigation, the size and shape of the gap G, which part of the four sides of the legal frame 1 the gap G is generated in, the state of the surface condition of the slope F, etc. are performed. It will be. By this confirmation operation, as described later, the type of protective agent (liquid agent) 3 (see FIG. 5) to be sprayed in the gap G and the type of waterproofing agent 8 used for waterproofing after filling are selected. Further, it is also determined whether or not to carry out an arrangement step of arranging the wire mesh (wall member) 5 along the legal frame 1 in the vicinity of the gap portion G.

  Next, a drainage step of treating the drainage of the running sewage is carried out (S2). Sewage is water such as rainwater or ground water, and means water remaining in the frame of the legal framework 1 or in the slope F thereof. Generally, in the legal framework, in order to prevent the retention of water within the framework, a flow path for draining running sewage is formed. Also in the legal frame 1 of the present embodiment, the flow path 6 is formed in the lower side 2 so as to penetrate from the upstream side to the downstream side. However, the flow path 6 may be clogged with soil, plants, etc., and when the flow path 6 is clogged, water (flowing sewage) accumulated on the upstream side of the lower side 2 (that is, inside the frame of the legal frame 1) It is not smoothly discharged to the downstream side (that is, out of the legal framework 1).

  Moreover, when there is much spring water from the underground, when rain water is difficult to be discharged by soil quality etc., water may be accumulated inside the slope F. In such a case, the soil and plants in the flow path 6 are removed to secure drainage from the flow path 6, or a tubular member is installed inside the slope F to make the water inside the slope F legal frame We carry out drainage treatment to discharge from the inside of 1 frame to the outside of the frame.

  Next, the removal process which removes a contaminant is implemented (S3). Contaminants are unstable floating stones and wastes present in the gap G and its periphery, falling objects of plants, and the like. If these are present in or around the gap G, the protective effect of the surface of the slope F in the spraying step described later may be reduced, or the gap G may not be filled properly. Therefore, it is significant for implementing the removal process of a foreign substance before implementation of a spreading | diffusion process to the durability improvement of clearance gap G periphery and the working efficiency improvement of a filling operation.

  Next, the spraying step is performed (S4). The spraying step is a step of spraying the protective agent 3 into the gap G. The protective agent 3 is a liquid agent to be sprayed before the filler G (foam material) 7 (see FIG. 5) is filled in the gap G, and is for protecting the filler 7. The protection of the filler 7 prevents the moisture from being supplied to the filler 7 from the ground side, and prevents the rainfall from penetrating along the ground to the filler 7. It means that. By spraying the protective agent 3, penetration of the ground-side water, rain, etc. into the filler 7 is suppressed. The types of liquid agents that can be selected as the protective agent 3 will be described later. The spraying may be carried out by, for example, a sprayer, may be carried out using a jello-like one, or may be done with a hygienic one.

  Next, it is determined whether the placement process is necessary (S5). The disposing step is a step of disposing the wire mesh 5 for suppressing the expansion of the filler 7 from the gap portion G. The wire mesh 5 is disposed at least on the lower slope side (downstream side) of the lower side 2 so as to cover the gap G, and may also be disposed on the upper slope side (upstream side) of the lower side 2 if necessary (see FIG. 3) ). The wire mesh 5 is disposed along the lower side 2 so as to exhibit a function as a wall member that suppresses expansion of the filling material 7 from the gap G. In order to fill the gap 7 with the filler 7 after the wire mesh 5 is disposed, the wire mesh 5 is formed with at least one through hole communicating the outside and the inside of the gap G in the disposed state. In the present embodiment, the lattice holes 5a of the wire mesh 5 correspond to the through holes.

Whether the placement process is necessary or not is comprehensively determined according to the position and size of the gap G, the surface condition of the slope F, and the like. If it is determined that the disposing step is necessary, the disposing step is performed (S6). If it is determined that the disposing step is unnecessary, the process proceeds to the filling step without disposing the wire mesh 5.
Next, the filling step is performed (S7). The filling step is a step of filling the filler 7 in the gap G. The filler 7 is injected into the gap G from the downstream side or the upstream side of the lower side 2. For example, when the wire mesh 5 is disposed, the injection nozzle is inserted from the outside of the wire mesh into the gap G, and the filler 7 is injected through the wire mesh 5. The filler 7 is a foam material and is liquid at the time of injection, but after being injected, the filler 7 foams and expands in the gap G and spreads and fills the gap G. When the expansion converges, the filler 7 hardens with the passage of time.

  When the wire mesh 5 is disposed, the expanded filler 7 contacts the wire mesh 5 and the wire mesh 5 suppresses further expansion. Of course, depending on the roughness of the wire mesh 5, the outflow of the filling material 7 to the outside of the gap G may not be completely prevented in some cases, but the gap G of the filling material 7 is still The effect of suppressing the outflow to the outside can be obtained to some extent. Since the wire mesh 5 is disposed along the lower side 2, the expansion of the filler 7 is stopped and hardened in a state in which the metal mesh 5 is expanded in a shape substantially along the outer shape of the lower side 2. The types of foam materials that can be selected as the filler 7 will be described later.

  The curing time of the filler 7 is awaited (S8). The curing time of the filler 7 varies depending on the type of foam material, but is generally several minutes to several tens of minutes. When the wire mesh 5 is disposed, the wire mesh 5 is removed during or after the curing of the filler 7. The vicinity of the lower side 2 after the filler 7 is cured is shown in FIG.

  Next, the surface roughening step is carried out (S9). The surface roughening step is a step for roughening the surface state of the filler 7 which has protruded from the clearance G to the outside (that is, the outside of the outer shape of the lower side 2) to improve the effect of the subsequent waterproofing treatment. The surface of the filler 7 in the expanded and cured state may have a smooth surface and may not be coated with a waterproofing agent (paint) for waterproofing treatment (the adhesion of the paint is not good). By roughening the surface of the filler 7, the adhesion strength of the waterproofing agent to the surface is improved, and the durability and the weather resistance of the filler 7 are improved.

  In addition, this surface roughening process may be combined with the process of shaping the filler 7. If the filling material 7 remains in a state of protruding from the gap G, the appearance is impaired, and the protruding portion 7a is easily subjected to an external force or the like, leading to a reduction in strength. The shape of the filler 7 is reshaped by cutting the portion 7a of the filler 7 which protrudes from the gap G with a cutter such as a cutter or a saw, and the amount of protrusion from the lower side 2 is reduced to improve aesthetics and strength. The adhesion strength of the waterproofing agent can also be improved by roughening the surface.

  Next, a waterproofing process is performed (S10). The waterproofing step is a step of applying a waterproofing treatment to the surface of the filler 7 after the filling step. If waterproof treatment is applied to the surface by applying a waterproofing agent 8 (see FIG. 5), the durability and weather resistance of the filler 7 are improved. It is desirable that the waterproofing process be performed after the shaping process or the roughening process. The portion of the filler 7 protruding from the gap G is cut and shaped, the surface is roughened, and the waterproofing agent 8 is applied. The adhesion strength of the waterproofing agent 8 is also improved, and the aesthetics are also improved.

  As described above, in the gap filling method for filling the gap portion G generated between the legal frame 1 and the slope F, the investigation step, the draining step, the removing step, the dispersing step, the arranging step, the filling step, the roughening By sequentially performing the process and the waterproof process, the gap G can be reliably closed in a short time in a simple process. The aesthetics of the construction result can be improved, and the durability and the weather resistance can also be improved. In addition, if it is set as the clearance filling construction method which consists only of a dispersion | distribution process, a filling process, and a waterproof process, a process can be simplified further and a time-saving. However, depending on the situation, by carrying out any or all of the steps selected from among the investigation step, the drainage step, the removal step, the placement step, and the roughening step as appropriate, the appearance and durability can be further improved. It can be a high quality construction.

[Type of Protective Agent 3]
As the protective agent 3 used in the spraying step, for example, an asphalt emulsion can be used. Examples of asphalt emulsions include cationic emulsions, nonionic emulsions, high permeability asphalt emulsions, high density asphalt emulsions, cutback asphalt emulsions, modified asphalt emulsions and the like. Moreover, as the protective agent 3, for example, a polyurea resin composed of a main agent and a curing agent can be used. As an example of a main ingredient, methylene bis (4-phenyl isocyanato), 4,4'-diphenyl methane diisocyanate, etc. can be mentioned. Examples of the curing agent include silica, tetraxysilane, ketimine, ethanol and the like.

  When a polyurea resin is used as the protective agent 3, it is desirable to mix the main agent and the curing agent immediately before spraying. For example, it is conceivable to mix the main agent and the curing agent using a gun type mixer nozzle or the like which mixes the two solutions by a static mixer immediately before the spray nozzle and sprays it as a mixed solution. In addition, it is also possible to use a polyurethane resin as the protective agent 3.

[Type of filler 7]
As the filler 7 used in the filling step, for example, a two-component rigid foam polyurethane foam can be used. The two-component rigid foam urethane foam is a material which is quickly expanded to be a foamed resin by mixing the two solutions of A solution and B solution. Examples of solution A include polyethylene polyphenyl polyisocyanate containing methylene bis diisocyanate and the like, and mixtures of other isocyanates. As an example of B liquid, polyol mixtures, such as polyethylene glycol and a polypropylene glycol, etc. can be mentioned.

  By mixing LPG, DME, fluorocarbon gas and the like into each of the solution A and the solution B, it is possible to impart foamability and injection performance. Furthermore, a flame retardant such as tris (monochloroisopropyl) phosphate can be mixed in the B liquid for the purpose of imparting flame retardancy, and bis [2- (dimethylamino) ethyl] methylamine is provided for the purpose of imparting rapid curing. Polyamines can be mixed in, low molecular weight polyols such as diethylene glycol can be mixed in for the purpose of imparting hardness, and surfactants etc. can be mixed in order to adjust the compactness.

  When using a two-component rigid foam urethane foam as the filler 7, it is desirable to mix the main agent and the curing agent immediately before the filling step. For example, it is conceivable to mix and jet A liquid and B liquid using the above-mentioned gun type mixer nozzle or the like.

[Type of waterproofing agent 8]
As the waterproofing agent 8 used in the waterproofing process, for example, a paint exhibiting a waterproof function and an ultraviolet ray preventing function can be used. As the paint, for example, oil paint, natural resin paint, synthetic resin paint (solvent type), synthetic resin paint (water type), synthetic resin paint (solventless type) can be considered.

  Examples of oil-based paints include oil-based formulated paints, synthetic resin-prepared paints, oil-based varnishes (super varnishes), oil-based enamels, oil varnishes, anticorrosion paints, aluminum paints and the like. Examples of natural resin coatings include shellac varnishes, lacquers, lacquers, cashews, high solid colors and the like. Examples of synthetic resin paints (solvent-based) include alkyd resin paints, acid-cured amino alkyd resin paints, polyester resin paints, epoxy resin paints, etching primers, vinyl chloride resin paints, chlorinated rubber paints, acrylic silicon paints, ordinary fluorine Resin paints etc. can be mentioned.

  Examples of the synthetic resin paint (water-based) include vinyl acetate emulsion paint, acrylic emulsion paint, acrylic silicone emulsion paint, fluorocarbon resin emulsion paint, water-soluble resin paint, water-based varnish and the like. Examples of synthetic resin paints (solventless) include epoxy resin-based powder paints, acrylic resin-based powder paints, polyester resin-based powder paints and the like.

In the protective agent 3 and the waterproofing agent 8, those containing dichloromethane, methyl alcohol, acetone, methyl ethyl ketone or the like as a solvent can cause partial dissolution or shrinkage of the filler 7 when in contact with the filler 7 It is necessary to use it keeping in mind that there is sex.
As mentioned above, although embodiment was described, this invention is not limited to these, A various deformation | transformation and change are possible within the range of the summary.

  For example, in the embodiment, the method of filling the filler 7 in the gap G formed between the lower side 2 and the slope F has been described, but the present invention is not limited to the lower side 2. It is possible to apply the gap filling method of the present invention even when the gap G is generated between the slope F and the other side of the frame 1, that is, the upper side or the left and right sides and the slope F. There may or may not be a placement step. The wire mesh 5 is preferably arranged on both the downstream side and the upstream side of the gap G, but it may be arranged only on the downstream side, or depending on the situation, the wire mesh 5 may be arranged only on the upstream side. It is also possible. The wall member is not limited to the wire mesh 5, and a veneer plate, an acrylic plate, a snail member or the like in which a through hole is formed may be used as the wall member.

F: Slope G: Gap (gap)
1: Legal frame (frame structure) 2: Lower side 3: Protective agent (liquid) 5: Wire mesh (wall member)
5a: lattice holes (through holes) 6: flow path 7: filling material (foam material) 7a: protruding portion 8: waterproofing agent

Claims (6)

Spraying a liquid agent in a gap formed between the frame structure placed on the slope and the slope when the slope is at least partially depressed;
Filling the foamed material into the clearance from the lower side or the upper side of the slope of the slope;
A clearance filling method, which comprises, after the filling step, performing a waterproofing step of applying a waterproofing treatment to the surface of the foam material.   The gap filling according to claim 1, further comprising a roughening step of roughening a surface of the foam material exposed to the outside from the gap portion after the filling step and before the waterproofing step. Construction method. Before the filling step, a wall member for suppressing the expansion of the foam material to the lower side of the slope along the frame structure so as to cover the gap on the lower side of the slope of the slope Further execute the placement process of placing
The gap filling method according to claim 1 or 2, wherein at least one through hole for filling the foam material from the outside to the inside of the gap portion is formed in the wall member.   The gap filling method according to any one of claims 1 to 3, wherein the foam material is a two-component mixture type urethane foam foam.   The gap filling method according to any one of claims 1 to 4, wherein the liquid agent is an asphalt emulsion, a polyurea resin solution or a polyurethane resin solution.   The clearance filling method according to any one of claims 1 to 5, wherein the waterproofing step is a coating step of a synthetic resin paint.

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