JPH0689544B2 - Backfill for Yamadome - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a back retention device for a mountain clasp that is used by interposing it between a mountain retaining wall and an upset in a mountain clasp construction.

[Prior Art] In mountain retaining works, generally, in order to prevent the collapse of the excavated wall surface, an earth retaining material (steel sheet pile, H-shaped steel, etc.) is driven in, and then this earth retaining material is angulated, cut beams, and fired. It is supported using main members such as. That is, as shown in FIG. 19, a diaper 2 is horizontally installed inside the earth retaining material 1 driven into the construction site, and then a girder 3 is installed at a right angle to the diaper. ing. The abutting portion between the waving and the sill is tightly connected by means such as bolting or welding, and further, the fluffing material 4 is attached to the corner portion of the aforesaid ridge and the intersection between the waving and the sill. The frame is formed. In this case, a backfilling material 5 such as conventional concrete is backfilled in the gap between the earth retaining wall 1 and the abdomen 2, and the fulcrum reaction force of the earth retaining wall is evenly distributed with respect to the abdomen. It is constructed so that it will not be applied as a load, and that an average axial force will act on the beam through the uprising.

By the way, during the above-mentioned backfilling, there is no problem as long as the opposing surfaces of the earth retaining wall and the abdomen are correctly parallel, but in reality, when driving steel sheet piles into the ground, due to earth pressure or It is known from experience that the direction in which the steel sheet pile is driven deviates due to obstacles inside, the hardness of the ground, and other factors, and the facing surface between the earth retaining wall and the abdomen is often not parallel. That is, the earth retaining wall 1 may be installed with an angle deviation in the horizontal direction with respect to the angulation 2 (Fig. 20), or the earth retaining wall may be installed with an inclination to the vertical direction. Sometimes (Fig. 21). As a result, the outer surface of the backfilling material and the earth retaining material or the abdomen are unilaterally contacted with each other, and because only a very small area collides, the abruption effect is reduced and the excavated wall collapses. May cause damage or damage to parts. Therefore, as described above, there has been a long-awaited development of a backfill material that can be brought into close contact with the earth retaining wall and the abdomen even if the facing surfaces of the earth retaining wall and the abdomen are not parallel.

Recently, in order to satisfy such a demand, for example, as shown in Japanese Utility Model Publication No. 61-17075, a plurality of wedge pieces constituting a parallel wedge device and a cross section orthogonal to one piece of the wedge pieces are curved. There has been proposed a back retention product (wedge device) for mountain clasps, which comprises a concave portion and an outer piece having a spherical convex portion on one side that fits closely and slidably with the concave portion. In this backfilling product, the outer piece freely tilts in both horizontal and vertical directions by the action of the spherical convex portion and concave portion even if the facing surface of the earth retaining wall and the abdomen is not parallel to each other, thereby forming an irregular gap or inclination. It is absorbed and is excellent in principle, but it has the following problems.

[Problems to be Solved by the Invention] That is, in a conventional backfilling product, an outer piece having a spherical convex portion is slidably combined with a rear surface of a parallel wedge device including at least two wedge pieces. In this case, the three members (two wedge pieces and one outer member) can be separated like a piece when not in use, and the three members can be separated from each other when constructing a mountain retaining structure. Since the three members are arranged in parallel in the vertical direction and back-filled in the gap between the earth retaining wall and the abdomen to frictionally engage and fix the three members, back-filling work is very difficult to perform. . In particular, each of the above-mentioned members is made of steel and has a heavy weight, and since they are easily separated as described above, there is a risk of dropping, so that it was difficult to set them in a predetermined position by one person's work. In addition, since a strong compressive force is applied to the above-mentioned members from both the earth retaining wall and the abdomen, it is easy to disassemble as well as move the members to position them if they are set to the back-filling position. There are drawbacks such as not being possible.

The present invention eliminates the above-mentioned drawbacks of the conventional type,
We propose a new easy-to-use back retaining device for Yamadome.

[Means for Solving Problems] That is, the present inventor has made the backfilling device of the above-mentioned purpose a reality by using a driving cotter and a clearance adjusting unit having the following configurations. That is, the driving cotter and the clearance adjustment unit are combined such that their opposing surfaces are inclined surfaces and both surfaces are slidably adhered in the cotter driving direction, and the adjustment unit is opposite to the inclined surface. At the side position, an arcuate recess having an arcuate cross section is provided in a direction perpendicular to the cotter driving direction, and a camber member having a substantially semicircular cross section is provided in the arcuate recess of the arcuate recess. The camber member is rotatably fitted around the center, and the camber member is held by guide members fixed to the upper and lower ends of the arc-shaped recess so that it is movable only in a direction perpendicular to the cotter driving direction.
It is intended to obtain the desired backfilling device for Yamadome.

The second invention of the present application is characterized in that, in addition to the above-mentioned first invention, a sphere that movably supports the camber member is rotatably fitted between the camber member and the arcuate recess. There is. Further, the third invention of the present application is characterized in that, in addition to the above-mentioned first invention, a guide piece attached to the camber member is arranged so as to slide on the guide member.

[Embodiment] Subsequently, one embodiment of the present invention will be specifically described with reference to the accompanying drawings. FIG. 1 is a perspective view of a backfilling tool of the present invention.
In this device, a driving cotter indicated by reference numeral 10 and a clearance adjustment unit indicated by 20 are combined so that their opposing surfaces are closely contacted with each other to form a wedge device. First, the structure of the driving cotter 10 will be described in detail. As shown in FIGS. 1 and 12, a driving plate 11 is provided which is in contact with the clearance adjusting unit 20 and performs a wedge action. The driving plate is formed of a substantially rectangular steel plate, and a surface 12a facing the adjusting unit is reduced in thickness from one end (upper end) to the opposite end (lower end) in the longitudinal direction.
On the other side, this forms a smooth flat surface portion 12b.
A grip portion 13 is integrally provided on the upper part of the driving plate, and a hand hole 14 is formed in this. Further, a plurality of insertion holes 15 for extraction tools are provided at a constant interval in the lower part of the handle and the driving plate body.

Next, the structure of the clearance gap adjusting unit 20 will be described in detail with reference to FIGS. 4 to 11. A receiving plate 22 having an inclined surface that contacts the driving plate 11 is integrally attached to the central portion of one side of the main plate 21. . This receiving plate is made of a steel material and has a wedge-shaped cross section like the driving plate. That is,
This receiving plate has a surface facing the driving plate 11 whose thickness increases from one end (upper end) toward the opposite end (lower end) to form a slope 22a. Further, on one surface of the main plate 21 located on the reflection side of the inclined surface portion, an arcuate concave portion 23 having an arcuate cross section is provided in a direction perpendicular to the driving direction of the driving plate. Notches 24, 24 are provided on both upper and lower sides of the main plate, and a pair of beam-shaped guide members 25, 25 are fixed to the upper and lower ends of the arc-shaped recess 23 in parallel with the short sides so as to straddle the notches. To do.

It should be noted that a camber member 26 having a substantially half-moon cross section is fitted in the arc-shaped recess 23 surrounded by the pair of beam-shaped guide members 25, 25 so as to be rotatable around the arc center of the arc-shaped recess. is there. That is, as shown in FIG. 7 and FIG. 8, the camber member 26 has a curved surface 27a on one side that can slide in close contact with the arcuate recess 23 and a smooth flat surface 27b on the opposite side. ing. Further, the guide member 2 is projected from the upper and lower end portions on the center line of the camber member.
Guide pieces 28,2 that can engage and slide over 5,25
8 is fixed on the curved surface 27a. Through holes 29 may be formed in the camber member for weight reduction.

The camber member 26 configured as described above is fitted into the arcuate recess 23 as shown in FIGS. 1 to 3, and separated by the upper and lower guide members 25, 25 and the guide pieces 28, 28. It is assembled and used so as not to move and to be movable only along the arcuate recess 23 in the horizontal plane direction and not to move in the vertical direction.

On the other hand, on both sides of such an adjustment unit body (main plate 21), a pair of suspending members 30 having a configuration described below,
Project 30. That is, as an example, a mountain-shaped steel is used to hang the hanging member upward from the upper ends of the left and right edges of the main plate 21.
Fix 30, 30. Also, the upper part of this suspension member is
Another angle piece 31 is attached so as to face each other and is formed into a tubular shape in cross section, and mounting holes 32 are provided on the front and back of this tubular portion. The mounting hole is formed by providing a plurality of stepped holes so that the size of the H-section steel used as the uprising can be easily accommodated. As shown in FIGS. 9 and 10, a horizontal portion 35b is provided between the pair of suspension members 30, 30.
An L-shaped fitting 33 having a grip 34 fixed thereto is provided. A vertical plate 35a of the mounting hardware 33 is provided with a mounting hole 36, and a pin 37 is jointed to the mounting hole 36 and the mounting hole 32 provided in the suspension member. By selecting the combination of the mounting holes 32 and 36, it is possible to adjust the mounting position on the suspension member in response to the size change of the abdomen, as will be described later.

Next, a method of using the backfilling device of the present invention having the above-described configuration will be described. On the mountain retaining structure, the ski clearance adjusting unit 20 of the present invention is gripped 34 at the contact position between the earth retaining material 1 and the bulging member 2. Make sure to suspend it via the mounting hardware 33 (see Fig. 13). In this case, as described above, since the H-section steels used as the uprising are H-section steels having different sizes depending on the load applied to the mountain retaining structure surface, the length of the flange f of the H-section steels is different for each size change. Therefore, set the mounting position of the mounting hardware 33 according to the flange length of the H-shaped steel.
Pre-adjust with 2, 36 and pin 37. And thirteenth
As shown in the figure, the horizontal plate 35b of the mounting hardware 33 is hooked on the upper surface of the rising flange so that the rising surface and the wedge surface of the adjusting unit 20 face each other. In this way, the clearance adjustment unit 20 is held on the angulated flange surface and supported so as not to fall, and then the driving cotter 10 is sandwiched between the sloped portion 22a of the receiving plate 21 and the angulated flange surface. Wear
As shown in FIG. 14 (a), the flat portion 27 of the camber member 26 is provided.
Attach b and earth retaining material 1 closely. At that time, the agitation 2
And the earth facing material 1 are not parallel to each other in the horizontal direction,
If it is inclined (see FIG. 20), the camber member 26 is used along the arcuate recess 23 in the state of use as shown in FIG. 14 (b).
As described above, it rotates in the horizontal direction and is biased to one side to absorb the angular deviation in the horizontal direction. Further, when the degree of the inclination is large, as shown in FIG. 14C, the liner 40 is inserted so that the gap between the horizontally opposed surfaces is eliminated. Finally, a hammer is used to drive the cotter 10 firmly and the backfilling device of the present invention is firmly fixed between the earth retaining material and the abdomen.

In the practice of the present invention, it is not necessary to adjust the angle deviation between the earth retaining material and the vertical facing surface of the abdomen unlike the conventional type. The reason is that the installation accuracy of the soil retaining material 1 is usually within 1/100, and even if the amount of movement of the soil retaining material due to excavation is taken into consideration, the slope rate is within 1/50 even under the worst conditions.
Therefore, the gap width α between the upset and the vertical facing surface of the soil retaining material α
Is a minute value of about 4 mm at the maximum for a height of 200 mm (see Fig. 21). Also, considering the existence of earth and sand adhering to the soil retaining material, only by hitting the cotter 10 in the back-filling device, the back surface of the camber member comes into close contact with the soil retaining material without any gaps, and thus, as described above. There is no need to adjust the angle in the vertical direction.

FIG. 15 is a partial plan view showing another embodiment of the present invention, and FIG. 16 is a vertical sectional view of the same. In this embodiment, the main plate 21
One or a plurality of ball pockets 50 are formed in the front and back directions, and steel balls 51 are rotatably fitted in the ball pockets. Further, as shown in FIG. 17 in an enlarged manner in this pocket 50, a coil spring 52 for projecting a steel ball 51 so as to rise above the bottom surface of the arc-shaped recess 23 is provided, and the camber member 26 is acted by this spring. Steel ball 51
Elastically support through. Further, in this embodiment, a ball pocket 53 is also formed in the guide piece 28 of the camber member, and a steel ball 54 is rotatably fitted in this pocket. The steel ball 54 is configured to come into contact with the guide member 25 and roll on the guide member 25.

Therefore, according to this embodiment, the camber member 26 is attached to the main plate 21.
The curved surface 27 of the camber member 26 when rotated with respect to
a does not contact the arc-shaped recess 23, and the steel balls 51, 5
By the action of 4, the camber member 26 can be slid with a light force, and the noise during sliding can be reduced.

In any of the above embodiments, when the backfilling tool of the present invention is removed from the abdomen after use, pass a shackle or wire through the hand hole 14 formed in the handle portion 13 of the driving cotter 10. Pull or insert the bar B into the insertion hole 15 of the tool formed on the driving plate 11 (18th
(Fig.), So that pull out the cotter 10 upward,
Next, the clearance gap adjusting unit 20 is ejected upward through the grip 34 provided on the mounting hardware 33. in this case,
Since the camber member 25 is held by the upper and lower guide members 25, the camber member 25 is not separated from the adjustment unit body (main plate 21) and can be collected together.

[Effects of the Invention] As described in detail above, the backfilling device of the present invention has the following advantages as compared with the conventional backfilling device.

In the backfilling tool of the present invention, since the camber member is incorporated in the clearance gap adjusting unit in advance and does not separate, the backfilling tool can be mounted and held at a predetermined backfilling position without a lot of manpower during field construction. be able to.

In construction, the camber member is tilt-adjusted and then the driving cotter is driven. According to the present invention, however, unlike the conventional type, this backfilling operation can be safely and reliably performed by one person.

Since the tilting operation of the camber member can be easily performed, the positioning can be speedily performed according to the inclination of the soil retaining material.

The ski-to-ski adjustment unit has a wedge-shaped member and a camber member attached to the center, so it is extremely robust.
Also, it can be freely set on any position of the angulated flange piece.

Since the present invention is composed of two pieces as a whole, the assembly during use and the disassembly when not in use can be done quickly and safely, and the holding and management of the members becomes simple.

In the present invention, between the camber member and the arcuate recess,
Since the sphere that movably supports the camber member is rotatably fitted, the alignment between the clearance adjustment unit and the camber member can be further facilitated, and the guide piece attached to the camber member is the guide member. Since it is arranged to slide over the camber member, the camber member does not come off from the clearance adjusting unit and therefore does not dissipate, and when the camber member is set between the mountain retaining wall and the abdomen, and also the camber member. The movement can be made even easier when aligning.

As described above, the present invention exhibits excellent effects when used in civil engineering construction work.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a back-filling device of the present invention, FIG. 2 is a front view of a clearance adjusting unit that constitutes the present invention, FIG. 3 is a plan view, and FIG. 4 is a front view of a unit body of the same. Fig. 5 is the same plan view, Fig. 6 is the same longitudinal sectional view, Fig. 7 is a front view of the camber member, Fig. 8 is the same plan view, Fig. 9 is a front view of the mounting hardware, and Fig. 10 is a side view. , Fig. 11 is a front view of the mounting pin, Fig. 12
FIG. 13 is a front view of a driving cotter, FIGS. 13 and 14 are explanatory views during use, FIG. 15 is a partial front view showing another embodiment of the present invention, and FIG. 16 is a vertical sectional view of the same. FIG. 17 is an enlarged view of the same portion, FIG. 18 is an explanatory view showing a state in which the back-filling device is pulled out by using a burl, FIG. 19 is a perspective view showing a mountain retaining frame, and FIG.
FIG. 21 and FIG. 21 are explanatory views showing the built-in state of the earth retaining material and the abdomen. 1 ... Earth retaining material, 2 ... Upset, 3 ... Kiribashi, 4 ... Fire-filled material, 5 ... Backfill material, 10 ... Implanted cotter, 11 ...
… Driving plate, 12a …… Slope view, 12b …… Flat part, 13
…… Handle part, 14 …… Hand hole, 15 …… Tool insertion hole, 20 …… Spacing adjustment unit, 21 …… Main plate, 22 …… Receiving plate, 22 a ……
Slope, 23 ... Arc-shaped recess, 24 ... Notch, 25 ... Guide member, 26 ... Camber member, 27a ... Curved surface, 27b ...
Plane part, 28 ... Guide piece, 29 ... Through hole, 30 ... Hanging member, 31 ... Angle piece, 32 ... Mounting hole, 33 ... Mounting hardware, 34 ... Grip, 35a ... Vertical plate , 35b …… Horizontal plate, 36
...... Mounting hole, 37 ...... pin, 40 ...... liner, 50,53 ……
Ball pockets, 51, 54 ... Steel balls, 52 ... Spring.

Claims (7)

[Claims] 1. A driving cotter (1) which is a back-filling tool interposed between the mountain retaining wall and the abdomen, and which constitutes a wedge device.
0) and the clearance adjustment unit (20). The cotter and the adjustment unit have inclined surfaces (12a) and (22a) facing each other, and both inclined surfaces are slidably attached in the cotter driving direction. The adjustment unit (20) is provided with an arcuate recess (23) having an arcuate cross section in a direction perpendicular to the driving direction, at a position opposite to the inclined surface, A camber member (26) having a half-moon shape in cross section is fitted in the arcuate recess rotatably around the arcuate center of the arcuate recess, and the camber member is fixed to the upper and lower ends of the arcuate recess. The back-filling device for mountain fastening, which is held by the guide member (25) and is configured to be movable only in the direction perpendicular to the cotter driving direction. 2. A driven cotter (10) is composed of a plate (11) having a sloped portion (12a) formed by decreasing the thickness from one end to the opposite end, and a plurality of through holes ( The back-filling device for clasping according to claim 1, further comprising 15). 3. The ski clearance adjusting unit (20) has a slope (22) formed by increasing the thickness from one end to the opposite end.
a) and a plate member (21) (21) having a suspension member (30) on both sides, and an L-shaped mounting hardware (33) on the suspension member (32) having a step. ) The back-filling device for mountain clasps according to claim 1, which is provided so that its mounting position can be adjusted. 4. The back-mounting tool for clasping according to claim 3, wherein the mounting hardware (33) has a grip (34). 5. A driving cotter (1) which is a back-filling tool interposed between the mountain retaining wall and the abdomen, and which constitutes a wedge device.
0) and the clearance adjustment unit (20). The cotter and the adjustment unit have inclined surfaces (12a) and (22a) facing each other, and both inclined surfaces are slidably attached in the cotter driving direction. The adjustment unit (20) is provided with an arcuate recess (23) having an arcuate cross section in a direction perpendicular to the driving direction, at a position opposite to the inclined surface, A camber member (26) having a half-moon shape in cross section is fitted in the arcuate recess rotatably around the arcuate center of the arcuate recess, and the camber member is fixed to the upper and lower ends of the arcuate recess. Is held by a guide member (25) and is movable only in the direction perpendicular to the cotter driving direction, and the camber member is moved between the camber member (26) and the arcuate recess (23). Support possible Backfilling equipment for earth retaining, characterized in that the sphere (51) is fitted rotatably. 6. The scope of claim 5, wherein the sphere (51) is supported via a coil spring (52) inserted in a pocket (50) formed in the arcuate recess (23). A backfill device for mountain clasps. 7. A driving cotter (1) which is a back-filling tool interposed between the mountain retaining wall and the abdomen and constitutes a wedge device.
0) and the clearance adjustment unit (20). The cotter and the adjustment unit have inclined surfaces (12a) and (22a) facing each other, and both inclined surfaces are slidably attached in the cotter driving direction. The adjustment unit (20) is provided with an arcuate recess (23) having an arcuate cross section in a direction perpendicular to the driving direction, at a position opposite to the inclined surface, A camber member (26) having a half-moon shape in cross section is fitted in the arcuate recess rotatably around the arcuate center of the arcuate recess, and the camber member is fixed to the upper and lower ends of the arcuate recess. The guide piece (28) is held by the guide member (25) and is movable only in the direction perpendicular to the cotter driving direction, and is attached to the camber member (26).
Is provided so as to slide on the guide member (25).