JP2005023553A - Deformation recovery device for grating crib body by frost heaving - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deformation recovery device for a grating crib body by frost heaving capable of controlling the influence of the rising ground on the grating crib by frost heaving, absorbing frost heaving force acting on a grating crib material, always operating restoring force to prevent the deformation of the grating crib body by frost heaving and, at the same time, making it return to an original form to prevent the collapse of earth and sand of a slope to the utmost. <P>SOLUTION: An anchor 11 is erected to the center wherein the front end face 2A of the grating crib material 2 is opposed to the ground A and is placed by burying and fixing it in the ground A. An immovable plate 13 provided to the anchor 11 is placed between the ground A and the grating crib materials 2 and 2. A pressure-receiving plate 16 is provided to the upper part side 11B of the anchor 11, and a cylindrical guide body 19 forming a guide hole 19A corresponding to the grating crib material 2 is provided to the lower surface of the pressure-receiving plate 16. An engaging section 20C of a movable body 20 fitted to the front end side of each grating crib material 2 is fitted to the guide hole 19A to support it on the cylindrical guide body 19 so as to enable it to make displacement in the vertical direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for recovering deformation of a frame by freezing to prevent the frame installed on the slope from partially rising and deforming due to freezing of the ground, and finally breaking.
[0002]
[Prior art]
In order to prevent landslides, the cut slope has been installed with a frame made by connecting concrete frame members made of concrete in a grid pattern, but the ground that forms the cut slope is In cold regions, the so-called frost heaving phenomenon occurs when the ground surface freezes as the temperature decreases in the cold region due to the water content and soil quality in the ground, and the phenomenon of sinking due to its own weight occurs as the temperature increases. For this reason, since the frost heaving force which pushes up acts on the method frame body installed on the ground, there is a problem that the method frame body gradually deforms and collapses over time as the ground rises and sinks. Moreover, even if it does not collapse, there is also a problem that some legal frame materials have floated from the ground and cannot prevent the collapse of earth and sand effectively.
[0003]
Therefore, as a measure for preventing freezing, a method of arranging a frame material having a weight of, for example, about 380 kg / m ² is employed. This method restores the frozen ground by the weight of the legal frame material, and is said to have a corresponding effect, but it is dangerous to install the other side, a heavy legal frame material on the sloped ground surface. In addition, there is a problem that the efficiency is low, and there is a problem that the cost of repair and repair work once deformed increases.
[0004]
For this reason, the frame material molded into a weight that is easy to handle is arranged in a lattice shape with its tip abutted, and a reinforcing bar is embedded in the ground in the center of the space formed by being surrounded by the tip surface, standing upright, A method of constructing a frame body by attaching a wire provided on each frame material to the reinforcing bars and then filling the space with concrete is performed.
[0005]
[Problems to be solved by the invention]
However, the above-mentioned method is not constructed with special consideration for frost heave measures, so it is inevitable that the legal frame will be deformed and damaged by the frost heaving force. Although the current situation is to go, there is a problem that maintenance costs and repair costs increase.
[0006]
The present invention has been made in view of the above-mentioned disadvantages of the prior art, and suppresses as much as possible the influence of the ground rising due to frost heaving on the frame, and the frost heaving force acting on the frame is absorbed and restored. By constantly working the force, the frame was prevented from being deformed by frost heaving force, and the maintenance costs and repairs were reduced by preventing slope collapse and reducing repair or renovation work. An object of the present invention is to provide an apparatus for recovering deformation of a legal frame by freezing that can save costs and the like.
[0007]
[Means for Solving the Problems]
The means of the present invention configured to solve the above-described problem is located in a butt space formed by making the front end surfaces of a plurality of frame members arranged on the ground face each other. Is anchored to the ground by being anchored to the ground and disposed between the ground and the tip side of a plurality of frame members in a state of being inserted through the anchor. A stationary plate, a pressure receiving plate disposed above the method frame member in a state where the anchor is inserted substantially in the center, and locked to a predetermined height via an engagement means; A cylindrical guide body having a vertically long guide hole on the body surface corresponding to the frame material and loosely fitted in the abutting space with the upper end fixed to the pressure receiving plate, and both end sides of each of the normal frame materials The tip end side is inserted through the guide hole and can be slid up and down on the cylindrical guide body. A movable plate became engaging portion for engagement, it is sandwiched between the movable plate and the pressure receiving plate, and a resilient member for constantly urging the pressing force to the method frame member.
[0008]
Then, it is preferable that a male threaded portion is formed at least on the upper side of the anchor, and the pressure receiving plate can be adjusted in the axial displacement amount by a nut screwed to the anchor.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail. In the figure, reference numeral 1 denotes a frame body placed on the ground A which is cut and formed on a slope surface. The frame body 1 has a large number of concrete frame materials 2, 2,. In this state, they are arranged in a substantially lattice shape. Here, each frame member 2 is an existing one, and both end surfaces 2A, 2A of a long square member having a rectangular cross section are formed in a curved surface, and a bulge projecting from the outer surface on the front end side in a substantially letter shape. It is formed in the parts 2B and 2B, and a concave groove 2C is formed on the upper surface along the longitudinal direction. Then, by disposing the front end surfaces 2A, 2A,... Of the four method frame members 2, 2,... Facing each other, the method frame body 1 has a large number of substantially circular butting spaces 3, 3,. ... are formed.
[0010]
Reference numeral 11 denotes an anchor made of a steel bar which is located in the butt space 3 and is erected from the middle with the lower side 11A embedded in the ground A and the upper side 11B protruding from the ground A. The anchor 11 is Yes externally threaded portion 12C to the entire peripheral surface is engraved, the lower side 11A by filling the cement milk 12 to Juana A ₁ bored into the ground A, with the ground A and cement milk 12 It is firmly fixed by the adhesion.
[0011]
Reference numeral 13 denotes a stationary plate that receives a partial frost heaving force P applied to a part of the frame material 1 by a surface, and the stationary plate 13 is a circular shape having a through hole 13A through which the anchor 11 is inserted at substantially the center. It consists of a steel plate. The stationary plate 13 is disposed between the tip side of the four frame members 2, 2,... Arranged in a cross shape on the ground A with the tip surface 2A facing each other and the ground A. Yes, it is fixed on the ground A through a washer 15 by a nut 14 screwed into the anchor 11. As a result, even when the frost heaving force P acts on the front end side of any of the frame members 2, the frost heap force P affects the entire frame 1 by receiving it on the surface of the stationary plate 13. Can be suppressed.
[0012]
Reference numeral 16 denotes a pressure receiving plate for pressing against the frost heave force P. The pressure receiving plate 16 protrudes from the substantially square base plate portion 16A in four directions to form a substantially square protruding portion 16B, 16B,... It consists of a flat steel plate with 16C drilled, and an annular upper spring stopper 17 is fixed to the lower surface of each overhanging portion 16B. The pressure receiving plate 16 having the above-described configuration is restricted in axial displacement at a predetermined position by tightening the nut 18 while being inserted into the anchor 11. The pressure receiving plate 16 can be adjusted to a desired height by screwing the nut 18 in the forward and reverse directions.
[0013]
Reference numeral 19 denotes a cylindrical guide body made of a steel plate loosely fitted in the butt space 3 by fixing its upper end to the base plate portion 16A of the pressure receiving plate 16, and each frame member 19A of the cylindrical guide body 19 is provided with each frame material. Corresponding to 2, four vertically long guide holes 19B, 19B,... Are formed spaced apart in the circumferential direction.
[0014]
Next, 20, 20,... Indicate movable bodies that behave integrally with the legal frame member 2 by being fitted to the distal end side of the respective legal frame members 2. Each movable body 20 includes a substantially bowl-shaped fitting portion 20A that is fitted to the frame member 2 from above, and a horizontal flat plate that is loosely fitted in the guide hole 19B of the cylindrical guide body 19, and the fitting portion 20A. The engaging portion 20C is formed integrally with the connecting portion 20B protruding forward from the front end surface 2A of the frame member 2 and the curved horizontally long piece wider than the guide hole 19B. The engaging portion 20C rises from the front end of the connecting portion 20B. Are integrally formed using a steel plate, and a lower spring stopper 21 is fixed to the upper surface of the fitting portion 20A so as to face the upper spring stopper 17.
[0015]
The movable body 20 having the above-described configuration is engaged with the engaging portion 20C inserted into the cylindrical guide body 19 from the guide hole 19B and slidable in the vertical direction along the inner surface of the cylindrical guide body 19. I'm allowed. Further, since the front end side of the frame member 2 is bulged portions 2B and 2B, the fitting portion 20A fitted to the frame member 2 is displaced laterally and a lateral tensile force acts. Even if it does not come off from the frame material 2, it can behave integrally.
[0016]
22, 22,... Indicate pressing springs composed of compression springs sandwiched between the pressure receiving plate 16 and each movable plate 20, and each pressing spring 22 is coated with a resin for corrosion protection. Each pressing spring 22 is always biased to the movable plate 20 by engaging and tensioning the upper and lower ends thereof with the upper spring stopper 17 and the lower spring stopper 21.
[0017]
Although the deformation recovery device for the frame by frosting according to the present embodiment has the above-described configuration, a construction procedure for installing the device will be described first. On the ground surface A of the slope which is cut and formed, each frame member 2 of the frame body 1 to be installed is arranged at a predetermined position so as to form a lattice shape. Then, the opposed front end surfaces 2A of the modulo frame member 2, 2A, performs positioning of the butt space 3 is formed by ... to form Juana A ₁ to excavate the ground A. Then, insert the bottom side 11A of the pillar 11 to the center of該掘holes A _1, it is firmly fixed to the strut 11 by filling the cement milk 12 around relative to ground A. The anchor 11 can have a strong pulling strength when the cement milk 12 is in close contact with the male screw portion 11C engraved on the outer peripheral surface.
[0018]
Next, the frame material 2 is arranged in a substantially cross shape with the distal end surface 2A facing the anchor 11 as a center, and the pressure receiving plate 16 is fitted to the upper side 11B of the anchor 11 protruding upward from the ground A. Then, the cylindrical guide body 19 is inserted into the butt space 3. Then, the engaging portions 20C of the movable plate 20 are fitted and engaged in the respective guide holes 19B of the cylindrical guide body 19, and the fitting portion 20A is moved from above to a position in front of the bulging portion 2A of the frame member 2. Mating. After that, pressing springs 22, 22,... Are sandwiched between the movable plate 20 and the pressure receiving plate 16, and the pressure receiving plate 16 is lowered by screwing the nut 17 around the anchor 11 to move the pressure receiving plate 16 through the movable plate 20. A spring force F of the pressing spring 22 is applied to the frame member 2 with a desired force.
[0019]
The action of preventing the deformation of the frame 1 due to the frosting of the ground A by the frost heave deformation recovery device installed on the ground A as described above will be described. When the outside air temperature drops and the surface side of the ground A freezes, the frame material 2 and the pressure receiving plate 13 are pushed up by the frost heaving force P that the ground A rises, but the pressure receiving plate 13 is pressed against the ground A via the nut 14. Since the anchor 11 has the lower side 11A fixed to the ground A via the cement milk 13, the tensile strength Tpa acts, so that the pressure receiving plate 13 can be prevented from rising as much as possible.
[0020]
Further, each of the frame members 2 is not fixed to each other but is engaged with the cylindrical guide body 19 via the movable body 20 so as to be displaceable in the vertical direction. Even if each method frame member 2 fluctuates by a different amount of displacement in the vertical direction or the horizontal direction, there is almost no stress transmission to the other method frame members 2, and the entire method frame member 1 is prevented from being deformed. be able to.
[0021]
Further, a pressure receiving plate 16 is provided on the anchor 11 which is firmly erected by embedding and fixing the lower side 11 </ b> A to the ground A and applying a tensile strength Tpa, and between the movable body 20 fitted to the frame member 2. By sandwiching the pressing spring 22, the pressing spring 22 absorbs the frost heaving force P acting on the method frame material 2, and the pressing force F is constantly urged against the method frame material 2, so that it rises. The frame member 2 can be returned to the initial state, and the deformation of the legal frame body 1 due to frost heave can be recovered.
[0022]
In the embodiment, the pressing spring 22 made of a coil spring is used as an elastic body. However, a rubber or soft synthetic resin having elastic force and low temperature resistance may be used.
[0023]
【The invention's effect】
Since the present invention is configured as described in detail above, the following effects can be obtained.
(1) The stationary plate anchored to the anchor that is embedded in the ground suppresses the frost heaving as much as possible to minimize the effect on the frame material. Absorbed by the pressure spring sandwiched between the locked pressure plate and the frame material, and the restoring force is applied, so that deformation and collapse of the frame body due to frost heaving force is prevented as much as possible. Can do.
(2) Since each of the frame members is engaged with the cylindrical guide body through the movable body so as to be vertically displaceable, only the frame member that has received the frost heaving force is supported by the cylindrical guide body. In this state, it is displaced in the vertical direction, but the lateral displacement is prevented, so that it is possible to prevent the frame member from being deformed and damaged.
(3) Since the legal frame material that has floated due to the frost heaving force is urged in the direction to be restored by the pressure spring, if the frost heaving force disappears due to an increase in temperature, the legal frame body is returned to its original position. The frame can be restored to its original form.
(4) The method and apparatus for recovering deformation of a legal frame by freezing according to the present invention is configured to return to the original shape of the legal frame body while the individual legal frame materials themselves are displaced and varied. The installation years can be extended to each stage as compared with the prior art frame that cannot return to the form.
(5) Since the situation where the law frame is deformed due to frost heave can be suppressed, the slope can be prevented from collapsing, and the repair or renovation work can be reduced, thereby reducing administrative and maintenance costs. be able to.
(6) Since the deformation recovery device for a framing body by freezing according to the present invention can be used by incorporating it into an existing framing body as long as a movable body can be fitted to the framing material, it can be used for construction work to prevent landslides on the slope. Costs required can be greatly reduced.
(7) Since the male threaded portion is engraved on at least the upper side of the anchor, and the pressure receiving plate can be displaced in the axial direction by a nut screwed to the anchor to adjust the spring force of the pressure spring, the geology of the ground Therefore, it is possible to set the spring force according to the different frost heaving force, and the deformation of the frame can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a plan view in which a method for recovering deformation of a frame by frosting according to an embodiment of the present invention is incorporated in the frame.
FIG. 2 is a perspective view of a frame material.
3 is an enlarged cross-sectional view in the direction of arrows III-III in FIG.
4 is an enlarged cross-sectional view in the direction of arrows IV-IV in FIG.
FIG. 5 is a main part perspective view showing an engaged state between a cylindrical guide body and a movable plate.
FIG. 6 is an explanatory view showing the frost heaving force of the ground and the action of the deformation recovery device for the frame by frost heaving.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Method frame body 2 Method frame material 2A Tip surface 3 Butting space 11 Anchor 11C Male thread part 13 Immobilization plate 16 Pressure receiving plate 18 Nut 19 Cylindrical guide body 19B Guide hole 20 Movable plate 20C Engagement part 22 Pressing spring A Ground

Claims (2)

An anchor that is positioned in the abutting space formed by facing the front end surfaces of a plurality of frame members disposed on the ground, and is erected on the ground by fixing the lower side to the ground; and The fixed frame is disposed between the ground and the front end side of a plurality of frame members in a state of being inserted through the anchor, and the frame is fixed to the anchor, and the frame is inserted through the anchor at substantially the center. A pressure receiving plate disposed above the material and locked to a predetermined height via an engagement means on the anchor, and a longitudinally long guide hole on the body surface corresponding to each of the above-mentioned frame materials, Cylindrical guide bodies loosely fitted in the abutting space with the upper end fixed to the pressure receiving plate and the both ends of the method frame member, and the distal end side is inserted from the guide hole and is inserted into the cylindrical guide. A movable plate that is an engaging portion that is slidably engaged with the body in the vertical direction, the movable plate, and the pressure receiving plate; Is sandwiched between, formed by composed of an elastic body that constantly urges the pressing force to the method frame member heaving deformation recovery device law frame by. 2. The method according to claim 1, wherein a male screw portion is formed on at least an upper side of the anchor, and the pressure receiving plate is adjustable in an axial displacement amount by a nut screwed to the anchor. Frame deformation recovery device.

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