JP2001200542A - Face of slope working method using conveying pile having protrusion on inner wall and conveying pile having protrusion on inner wall used for the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the sticking of fine particles to the inner wall of a conveying pile and also prevent the separation of the materials when force feeding mortar and concrete fluid matters are confluent with air in a face of slope working method. SOLUTION: Force feed pipes 60, 80 having a plurality of protrusion 61, 82 on the inner wall are used in the conveying piles 6, 8 feeding air fluid matter 101 under pressure where a fluid matter 100 is used in the face of slope working method or air and fluid matter in addition to a force feed pipe 60 with protrusion fluid matter having a plurality of protrusion 61 on the inner wall, an air pipe 5, a confluent air and fluid matter pressure feed device 7 in which air and the fluid matter are confluent, the forced feed pipe 80 with protrusion air fluid matter having a plurality of protrusion 81 on the inner wall and/or a face of slope working method using a vibrator 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sloping method for applying a mortar or a concrete fluid to a slope, and a pumping tube used in the method for applying a slope, the fluid being fed over a long distance. The present invention relates to a fluid-pumping pipe and a fluid-pumping pipe in which air is mixed with a fluid.

[0002]

2. Description of the Related Art Slope construction methods include on-site compounding method, production mortar, concrete batcher method, factory product mortar, concrete mortar, concrete mortar, and mortar sprayed on the slope by a pump. A surface pressure spraying construction method and the like are known.

[0003] In recent years, as a method of spraying mortar and concrete on a slope surface, in order to improve the slope strength after spraying, mortar and concrete with a low slump value and a high content have been used. It is known that short fibers such as steel fibers and polypropylene fibers are mixed in concrete, or that admixtures such as silica fume and fly ash are used.

[0004]

When a mortar or concrete fluid having a low slump value and a high content is used, which is used in a method of spraying mortar and concrete on a slope, is mixed with air, and the air is pressure-fed. Even with specially coated air fluid feed pipes, fine powder sticks to the inner wall of the pipe, causing separation of materials, and the length of the air fluid feed pipe cannot be increased by only about 20 m, resulting in poor workability. was there. It is particularly remarkable in long-distance pumping, and it is easy to separate into water, fine particles, fine aggregate, and coarse aggregate in the order of water, fine particles, fine aggregate, and coarse aggregate from the inner surface of the tube toward the center due to the friction of the inner surface of the tube and specific gravity. If so, the fluid will have reduced bleeding water and blockage. Further, there is a problem that the mortar and the concrete are solidified by the pressurization by the cylinder of the fluid-feeding pump, and the blockage occurs near the tapered pipe.

[0005] In the case of the air-fluid-pumping pipe, there is a problem that the highly viscous substance or the fine-grained substance swells in a row or a wave on the leeward side by blowing, and sticks and accumulates on the inner surface of the pipe. Was. As shown in FIG. 5, this sticking shape is formed into a half egg shape with the upstream side protruding and a crescent shape on the downstream side. This sticking shape has a problem that the maximum stable angle of the sand grains is formed and the sand particles are easily deposited continuously. Further, in a portion where the wind speed of the air is high, there is a problem that the shape to which the fine particles stick is narrowed and deposited into a V-shape or a parabolic shape which opens toward the leeward side as shown in FIG.

[0006] In order to improve these phenomena, there is known a method in which an AE agent is used to feed air by a surface-active action. However, in an air-fluid merging / feeding apparatus which joins with an air pipe, it is attempted to feed. Then, there is a problem that the bleeding water decreases and the inside of the taper pipe portion of the air fluid pressure feed pipe or the inside of the pipe where pressure is applied is blocked.

In addition, when mortar and concrete mixed with short fibers are pumped over a long distance, the short fiber material is separated from the mortar and concrete at a length of 120 to 200 m.

Further, when mortar or concrete is dropped by a pipe or a gutter and dropped down on an inclined surface, a material having a high specific gravity falls first due to a difference in specific gravity, and material separation occurs, so that the quality tends to deteriorate. was there. Especially in the case of mortar with short fiber and fluid such as concrete,
Even when the short fibers accumulate on the side wall surface or the bottom surface of the pipe or the gutter and collectively flow into the fluid pressure feeding pipe, there is a problem that the inside of the pressure feeding pipe is likely to be blocked.

[0009]

SUMMARY OF THE INVENTION To solve these problems, a projecting fluid pumping tube having a plurality of projections on an inner wall, an air tube, and an air fluid merging and pumping device in which air and fluid merge. And a method of constructing a slope by using a projection air fluid supply pipe having a plurality of projections on an inner wall.

[0010] Also, a projection fluid feed pipe having a plurality of projections on the inner wall, an air pipe, an air fluid confluence feeding device for joining the air and the fluid, and a projection air flow having a plurality of projections on the inner wall. A slope construction method comprising using an animal pumping pipe and providing a vibrating device to the projecting fluid pumping pipe, the air fluid merging pumping apparatus and the projecting air fluid pumping pipe to apply vibration while applying pressure. suggest.

[0011] Further, a pumping pipe for pumping a fluid or an air fluid in which air and a fluid are mixed for use in a slope construction method or the like is characterized in that the pumping pipe has a plurality of projections provided on an inner wall thereof. A pumping tube is proposed.

Further, in a fluid feeding pipe used for a slope construction method or the like, a plurality of projections are provided on an inner wall, and the projections have a relatively gentle slope on the upstream side and a sharp slope on the downstream side. The present invention proposes a fluid feeding pipe characterized by having a function of stirring the flow of a fluid by providing the pipe.

[0013] In the pressure-feeding pipe for the air fluid in which air and fluid are mixed for use in slope construction or the like, a plurality of annular projections are provided on the inner wall, and the annular projection has a relatively steep upstream side and a downstream slope. The present invention proposes a pumping pipe for air fluid, which has a gentle inclination and acts to stir the flow of air fluid.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an embodiment of the present invention, and FIG. 1 is an explanatory view of an apparatus used for a slope construction method. FIG. 2 is an internal sectional view of a fluid feed pipe. This will be described with reference to FIG. 3 showing an internal cross-sectional view of an animal pumping tube and FIG. 4 showing a partially cutaway perspective view of a fluid flow dropping member.

An apparatus and materials used in the method for constructing a slope according to the embodiment of the present invention will be described. The fluid 100 to be applied to the slope has a mortar such as cement, water, sand, fine aggregate, coarse aggregate, concrete material, or a mortar, an expansion coefficient substantially equal to that of concrete in these materials. It is a material obtained by mixing a large number of short steel fibers made of a steel material having the same and a mortar mixed with short fibers such as polypropylene and an adhesion enhancer for concrete.

Next, as a construction apparatus according to an embodiment of the present invention, there are a mixer truck 1, an air compressor 2, a fluid flow dropping chute 3, a fluid pressure pump 4, an air pipe 5, a fluid pressure pipe 6, an air A fluid confluent pumping device 7, an air fluid pumping tube 8, a protruding fluid pumping tube 60 having corrugated protrusions inside, a vibrating device 9, a protruding air fluid pumping tube 80 having inverted wave protruding inside, It is constructed by using a discharge section 10, a fluidized flow dropping gutter 11, a water collecting sedimentation tank 12, a pump 13 for introducing an admixture such as a coagulant, and the like.

The air pipe 5 has an upstream side connected to the air compressor 2, and a downstream side connected to an upstream end of the main air compression pipe 70 of the air-fluid confluence / pumping device 7. The admixture 5 joins the air pipe 5 from the admixture introduction pump 13 near the upstream end of the main air compression pipe 70.

In this embodiment, the fluid feed pipe 6 is a feed pipe having an inner diameter of 48 to 50 mm, and a plurality of projecting fluid feed pipes 60 each having a length of 3 m are provided at intervals of about 50 m. The side is connected to the fluid pressure pump 4 and the downstream side is connected to the upstream end of the fluid inlet pipe 71 of the air fluid merging device 7, and the total distance is about 300 m. The most upstream portion of the fluid pressure feed pipe 6 is provided with a tapered pipe 62 (a shape in which the downstream side is narrowed narrowly in a truncated cone shape) to adjust the flow rate.

In this embodiment, the projection fluid feed pipe 60 is a feed pipe having an inner diameter of 48 to 50 mm, and has a plurality of projections 61 intermittently and spirally provided on the inner wall. Each of the protrusions 61 provided on the inner wall is a deformed semi-elliptical spherical protrusion having a relatively gentle slope on the upstream side and a steep slope on the downstream side, and has a side-view wave shape. Although the number and relative positional relationship of the projections 61 are appropriate, in this embodiment, the height is about 4 mm, the width is 10 mm, and the length (length in the flow direction) is 30.
mm, each protrusion 61 is 150 mm in the upstream and downstream directions.
It is provided spirally and continuously at intervals at the front and rear. The operation of the plurality of projections 61 is such that the fluid that is pumped in the direction of the arrow changes in a monotonous flow by the plurality of corrugated projections, and the mixed material of the fluid 100 is pumped while being stirred. It is only necessary that any action occurs. As in this embodiment, when the upstream side has a gentle slope and the downstream side has a semi-elliptic spherical wave shape with a steep slope, and the plurality of projections 61 are spirally connected as a whole, the fluid 100 is relatively gently mixed. Pumped. The protrusion 61 of the inner wall is, as another embodiment,
Even a semi-elliptical spherical projection that is not corrugated when viewed from the side may have a function of being stirred and pumped while preventing separation of the fluid.

In this embodiment, the projecting fluid pumping pipe 60 has a length 3 at a distance of approximately 50 m from the fluid pumping pipe 6.
Although it is provided as m, it may be provided at a shorter interval, and it is also possible to lengthen the length itself of the projection fluid pumping pipe 61. The vibrating device 9 is provided in each of the projecting fluid pumping pipes 60.

The air-fluid converging / conveying device 7 comprises a straight tubular main air compression pipe 70, a fluid feed pipe 71 which diagonally joins the main air compression pipe, and a flow which diagonally joins the fluid feed pipe. It is a multi-branched tube composed of an animal air tube 72. Main air compression pipe 7
Numeral 0 denotes a cylindrical tube having a straight shape and the outer diameter of the tube does not change. The cylindrical tube 0 is connected to the air pipe 5 via a check valve at the upstream inlet, and connected to the air fluid pumping pipe 8 at the downstream outlet. Main air compression pipe 70
Is provided with a first jet pipe and a second jet pipe each having a shape in which the ejection port is narrowed down. The fluid feed pipe 71 joins while the downstream side is narrowed and narrowed in a tapered shape, and is connected to the downstream end of the fluid feed pipe 6 at the upstream end. The fluid air pipe 72 is connected on the upstream side to the downstream end of a second air pipe (not shown) from the air conditioner presser 2.

The air-fluid-pumping tube 8 has an upstream side connected to the downstream side of the air-fluid-merging / pumping device 7 and a downstream side connected to the discharge port 1.
This is a pumping pipe having a length of about 30 to 50 m, which is connected to the pump. In this embodiment, the air fluid supply pipe 8 is constituted by a projection air fluid delivery pipe 80 provided with a plurality of annular projections 81 in the present embodiment, but in other embodiments, the projection air fluid delivery pipe 8 is provided.
0 may be provided partially at an appropriate interval. When the entire length of the air fluid pumping pipe 8 is relatively short, all the pumping pipes are constituted by the protruding air fluid pumping pipes 80. A plurality of annular projections 81 are provided continuously on the inner wall of the projection air fluid pressure feeding pipe 80 via an annular valley 82 in the flow direction.
The annular projection 81 is provided over the entire peripheral surface of the inner wall with a constant width (length in the flow direction) of the inner wall of the pipe, which is 25 mm in this embodiment. The shape of each of the annular projections 81 is such that the upstream side is relatively steeply inclined, the downstream side is gentlely inclined, the side cross section is a reverse wave shape, and the annular projection 81 is annularly projected on the entire inner wall peripheral surface. In this embodiment, the annular projection 81 has a height of about 4 mm, a length of about 25 mm, and a width extending over the entire inner circumference. The length of the annular valley 82, which is the distance from the next annular projection 81 in the flow direction, is about 25 mm.
And the annular valley 82 are provided alternately. The function of the annular projection 81 is to make the air fluid 100 pressure-fed in the direction of the arrow.
However, the flow hits the steep slope on the upstream side of the annular protrusion 81, and the mixed material of the air fluid 101 is fed while being stirred. As in this embodiment, when the upstream side is steeply inclined and the downstream side is a gently inclined cross section, the cross-sectional view is an annular projection 81 having a reverse wave shape, and the fluid is pressure-fed while mixing while preventing separation of water and material, Discharge is performed from the discharge port 10 to the slope. As another embodiment, the annular projection 81 on the inner wall prevents the air fluid 100 from being separated even if the projection has a shape other than the reverse wave shape, or a partial annular projection that is not the entire inner peripheral surface, or even a point-like projection. What is necessary is just to perform the function of being stirred and pressure-fed.

The fluid flow dropping chute 3 and the fluid flow dropping gutter 11, which are the fluid flow dropping members, each have a plurality of projections 14 on the bottom surface, in this embodiment. The shape of each of the protrusions 14 on the bottom surface is a wavy shape in a side view of a modified semi-elliptical sphere shape in which the upstream side is relatively gentle and the downstream side is steeply inclined. The number and relative positional relationship of the projections 14 are appropriate, and the fluid 101 such as mortar, concrete, etc., which is dropped as an effect thereof
However, it suffices that the flow be stirred by a plurality of point-like wave-shaped projections, so that the substance having a large specific gravity in the fluid falls while entraining the fine particles. Therefore, the protrusion 14 on the bottom surface may be a protrusion having a shape other than the corrugated shape as another embodiment as long as the protrusion has a similar effect.

The vibrating device 9 is a device such as a vibrator.
0, which acts to give fine vibrations to the air-fluid confluence / pumping device 7 and the flow-down members 3, 11; In this embodiment, the vibrating device 9 is provided to be attached to each of the projecting fluid pumping pipe 60, the air fluid merging pumping device 7, and the flow distribution members 3, 11. In other embodiments, the projection air fluid delivery tube 80 or the projection-free fluid delivery tube 6
Or it may be attached to the air fluid pressure feed pipe 8.

Next, an embodiment of the slope construction method will be described. First, cement, water, steel fiber, polypropylene fiber, a mortar adhesion enhancer (a mortar setting speed retarder such as styrene, butadiene rubber latex, and polyvinyl alcohol liquid) are mixed by a mixer truck 1 or a stirring plant. Creates a rich, low slump fluid. In this example, the rich blended, low slump mortar fluid is rich blended with a slump value around 18 cm. The low-slump fluid is directly fed into the tank of the fluid pressure pump 4 or the like.

When spraying mortar, concrete, or the like on the slope, the air compressor 2 is first operated to send compressed air as air to the air pipe 5 and the fluid air pipe 72 of the air fluid confluence / pumping device 7. The coagulant is mixed and pumped through the tube. At about the same time, by operating the fluid pump 4, the fluid such as mortar and concrete is pumped through the fluid pumping tube 6, and is respectively fed to the air fluid merging and pumping device 7 to join.

While the fluid sent to the fluid feed pipe 6 is being pumped through the pipe, a plurality of projecting fluid feed pipes 60 provided at appropriate intervals of about 20 m to 50 m are provided on the inner wall. And the vibrating device 9 attached to each of the protrusion flow pressure feed pipes 60. Since a plurality of semi-elliptical spherical projections 61 are provided on the inner wall of the projection fluid pumping tube 60 at positions continuous in a helical row at various points, the fluid pumped from the fluid pump 4 is provided with a plurality of fluids. When the flow hits the gentle slope on the upstream side of the deformed semi-elliptical spherical projection 61, the inside of the pipe is helically rotated, and the material and the like in the fluid are agitated and pumped. When the upstream side has a gentle slope and the downstream side has a semi-elliptic spherical wave shape with a steep slope as in this embodiment, the fluid is pressure-fed while being relatively gently mixed. It can be pumped while preventing separation. In this embodiment, the projection fluid supply pipe 60 is vibrated by the vibrating device 9 attached thereto to improve the effect of preventing separation. In other embodiments, the vibration device 9 may not be provided.

One of the air from the air compressor 2 passes through the air pipe 5, enters the main air compression pipe 70 of the air-fluid merging and pressure-feeding device 7 from the upstream inlet, and enters the large-diameter inlet of the first jet pipe. . Here, the air is compressed, increases in pressure and speed, and is jetted from the jet port of the first jet pipe. The jet port of the first jet pipe is slightly upstream of the confluence position of the fluid supply pipe 71 of the air fluid confluence consolidation and pressure feed device 7, and merges obliquely from the fluid supply pipe 71 in the air traveling direction. The flowing fluid mixes with air from the jet port of the first jet tube,
Then, it enters the second jet tube. The mixture of the air fluid is further compressed by the second jet pipe, and is increased in pressure and speed to be jetted from the jet port of the second jet pipe to the air fluid pumping pipe 8 connected downstream, thereby mixing the air fluid. And sent directly downstream. The other air from the air compressor 2 enters from the upstream side of the fluid air pipe 72 of the air-fluid merging and feeding device 7 and joins with the fluid at the downstream side of the fluid inlet pipe 71 to assist the pumping.

In this embodiment, since the air fluid pumping pipe 8 is constituted by the projecting air fluid pumping pipe 80 over the entire length, the air fluid 101 is provided on the entire inner peripheral surface of the pipe inner wall while being pumped. Then, it receives the action of a plurality of annular projections 81 provided continuously through the annular valleys 82 in the flow direction, and the vibrating action of the vibrating device 9 attached to each projection air flow pressure feed pipe 80. The air fluid 101 is provided with fine vibrations by the vibrating device 9 and has a plurality of annular projections 81 continuously provided in the flow direction.
Each time, the flow is wound up, and the material and the like of the air fluid 101 are pumped while being stirred by the action of the vibrations and the projections. It is released to the surface and constructed.

When the fluid 100 is dropped along the inclined surface from the mixer truck 1 or the like, the projection 1 provided on the bottom surface is used in order to use the fluid flow dropping chute 3 of the present invention.
4 causes a change in the flow force of the flowing-down, and fine aggregates flow smoothly without accumulation of fine aggregates on the side wall surface and the bottom surface. Further, when the cleaning residue and the like (mainly fine aggregate) inside the pressure feed pipe and the like after the completion of the slope construction work are flow-distributed to the catchment sedimentation tank 12 and flowed using the drop gutter 11, similarly, The projection 14 provided on the bottom surface causes a change in the flow force of the flow-down, so that fine aggregate or the like flows down smoothly without accumulation of the fine aggregate on the side wall surface or the bottom surface.

[0031]

According to the present invention, in a slope construction method using a fluid such as cement, concrete or the like, a very long distance compared with the conventional method, and in this embodiment, the fluid is pumped by about 300 m. It is possible to prevent the separation of materials such as mortar, concrete, water, air, fine aggregate, coarse aggregate, etc., which constitute the air fluid during the pumping of the air fluid after air mixing, while preventing the separation of the material from 30 to 40 m. Pumping is now possible. For this reason, if it is conventional, the fluid is transferred to the slope of a place where it is too far from the installation place of the mixer truck or agitation plant, etc., and it is inconvenient or impossible to send it due to problems such as material separation of the fluid. There is an effect that it can be sent and sprayed.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is an overall explanatory view of an apparatus used for a slope construction method.

FIG. 2 is an internal cross-sectional view of a fluid pumping pipe used in the method for constructing a slope according to the present invention.

FIG. 3 is an internal cross-sectional view of an air-fluid pumping pipe also used in the method for constructing a slope according to the present invention.

FIG. 4 is a partially cutaway perspective view of a fluid distribution drop-off member used in the slope construction method of the present invention.

FIG. 5 is an explanatory view showing a shape in which deposits such as fine aggregates generated on the inner wall of a conventional air-fluid-pumping pipe adhere to the pipe, and showing a deposit shape corresponding to a change in which the wind speed becomes slow.

FIG. 6 is an explanatory view showing a shape in which deposits such as fine aggregates generated on the inner wall of a conventional air fluid pressure feed pipe are deposited, and shows a deposit shape corresponding to a change in which a wind speed increases.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mixer truck 2 Air compressor 3 Fluid flow drop chute 4 Fluid pressure pump 5 Air pipe 6 Fluid pressure pipe 60 Protrusion fluid pressure pipe 61 Protrusion 7 Air fluid merging / pressure feeding device 70 Main air compression pipe 71 Fluid feed Pipe 72 Fluid air pipe 8 Air fluid pumping pipe 80 Protruding air fluid pumping pipe 81 Annular projection 82 Annular valley 9 Vibration device 10 Discharge port 11 Fluid distribution and dropping trough 12 Collecting sedimentation tank 13 Pump for feeding admixture, etc. 14 Protrusions (of fluid flow-down member) 100 Mortar, concrete fluid 101 Mortar, concrete fluid mixed with air

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[Procedure amendment]

[Submission Date] January 25, 2000 (2000.1.2
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

Next, an embodiment of the slope construction method will be described. First, cement, water, steel fiber, polypropylene fiber, mortar adhesion enhancer (styrene, butadiene rubber latex, polyvinyl alcohol liquid) and the like are mixed by mixer truck 1 or a stirring plant to obtain a rich mixture and a low slump value. Create a fluid. In this example, the rich blended, low slump mortar fluid is rich blended with a slump value around 18 cm. The low-slump fluid is directly fed into the tank of the fluid pressure pump 4 or the like.

Claims (5)

[Claims] 1. A projection fluid pumping pipe having a plurality of projections on an inner wall, an air pipe, an air fluid confluence feeding apparatus for joining air and a fluid, and a projection air flow having a plurality of projections on an inner wall. A slope construction method characterized by using an animal pumping pipe. 2. A projection fluid pumping pipe having a plurality of projections on an inner wall, an air pipe, an air fluid confluence feeding device for joining air and a fluid, and a projection air flow having a plurality of projections on an inner wall. Using an animal pumping tube and a projecting fluid pumping tube,
A slope construction method characterized in that a vibrating device is provided in an air fluid confluence pumping device and a protruding air fluid pumping tube to perform pressure feeding while applying vibration. 3. A pumping pipe for pumping a fluid or an air fluid in which air and a fluid are mixed for use in a slope construction method or the like, characterized by having a pumping pipe provided with a plurality of projections on an inner wall. Pumping pipe. 4. A fluid feeding pipe for use in a slope construction method or the like, wherein a plurality of projections are provided on an inner wall, and the projections have a wave-shaped projection whose upstream side is relatively inclined and whose downstream side is steeply inclined. A fluid feed pipe characterized by being provided to act to stir the flow of a fluid. 5. An air-fluid feed pipe in which air and fluid are mixed for use in slope construction, etc., in which a plurality of annular projections are provided on an inner wall, and the annular projection has a relatively steep upstream-side shape and a downstream-side slope. A pressure-feeding pipe for an air fluid, which has a gentle inclination and acts to stir the flow of the air fluid.