JP2018048508A - Adapter member and earth-retaining timbering structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lengthily secure the length of a short strut by restraining downward deflection caused in the center in the longitudinal direction of the short strut with a simple structure.SOLUTION: An adapter member 10 arranged between a side surface of a wale 2 and an end surface of a short strut 3, comprises a first surface 11 on the wale 2 side and a second surface 12 on the short strut 3 side opposed to the first surface 11, and is inclined in the second surface 12 to the first surface 11. The adapter member 10 having an inclined plane is arranged between the wale 2 and the short strut 3, and the short strut 3 of an upward deflected state is extended between the wales 2, so that downward deflection caused in the center in the longitudinal direction of the short strut 3, can be restrained.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a structure of a mountain retaining structure used for preventing the excavation surface of a ground from collapsing, and an adapter member constituting the structure.

  FIG. 8 shows an example of a general mountain retaining structure. As shown in FIG. 8, when retaining a mountain, first, a plurality of retaining walls 1 are driven into the ground, and a region of a rectangular parallelepiped (planar rectangular) working space is secured by these retaining walls 1. Then, while excavating the area surrounded by the plurality of retaining walls 1, the plurality of raised portions 2 are brought into contact with and fixed to the inner surface side of each retaining wall 1. In addition, as shown in FIG. 8, there is a case where a relatively long erection 2 is used in order to form the work space horizontally. When such a long erection 2 is adopted, a large bending moment acts on the central portion thereof, and in order to suppress this, it is necessary to bridge between the erections 2 facing each other. A plurality of beams 3 are installed. At this time, in order to reinforce the joining state of the erection 2 and the beam 3, the fired beam 4 extending in an oblique direction is bolted so as to bridge the side surface of the erection 2 and the side surface of the beam 3. Sometimes.

  The above-mentioned Yamadome support structure is also disclosed in Patent Document 1, for example. The mountain retaining structure described in Patent Document 1 includes a plurality of belly erections installed on the inner surface of the retaining wall and a cut beam constructed between the opposite erections. In this document, a beam is configured by attaching end plates having a plurality of bolt holes as joints to both ends of a beam main body made of a square steel pipe. Further, a length adjusting member and a hydraulic jack are attached to one end side of the beam main body, and the length adjusting member is provided with a flange serving as a joint for joining the ends of the fire striking beam.

JP2015-175226A

  By the way, in the mountain retaining structure as shown in FIG. 8 and Patent Document 1, it is required to make the length of the cut beam 3 as long as possible in order to secure a wide work space with a simple structure. However, if the length of the cut beam 3 is lengthened, the central portion in the longitudinal direction is greatly bent downward under the influence of gravity as shown in FIG. This deflection increases as the length of the cut beam 3 increases. On the other hand, it is conceivable that the cut beam 3 is made of a high-strength material in order to suppress bending, but there is a limit to improving the strength of the cut beam 3. In addition, as shown in FIG. 8, it is possible to reinforce the cutting beam 3 by extending the fire beam 4 between the flank 2 and the side surface of the cutting beam 3. It is difficult to suppress.

  Thus, when a large deflection occurs in the cut beam 3, the bending moment generated in the erection 2 cannot be effectively suppressed. In addition, since the cut beam 3 is vulnerable to a load from the side surface, if a large load is applied from the retaining wall 1 in a state where the longitudinal center of the cut beam 3 is bent, the cut beam 3 may be damaged. It was. Thus, due to safety problems, it has been considered difficult to lengthen the length of the cut beam 3 in the mountain retaining structure.

  Therefore, the present invention has an object to solve the problem of suppressing the downward deflection generated in the center in the longitudinal direction of the cut beam with a simple structure, and ensuring the length of the cut beam.

  The inventor of the present invention has intensively studied the means for solving the above-mentioned problems. As a result, an adapter member having an inclined surface is arranged between the erection and the beam, and the cutting beam that can be bridged between the erection and the upper part is positioned upward. It was found that the bending of the beam in the longitudinal direction of the beam can be suppressed by bending it toward the center. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention. More specifically, the present invention has the following configuration.

  The first aspect of the present invention relates to the adapter member 10. The adapter member 10 is a member that is disposed between the side surface of the flank 2 and the end surface of the beam 3. The adapter member 10 has a first surface 11 on the flank 2 side and a second surface 12 on the cut beam 3 side facing the first surface 11, and the second surface 12 is in relation to the first surface 11. And has an inclined structure. The first surface 11 of the adapter member 10 may be directly joined to the side surface of the flank 2, or another member may be interposed between the first surface 11 and the flank 2. . Similarly, the second surface 12 of the adapter member 10 may be directly joined to the end surface of the cut beam 3, and other members are interposed between the second surface 12 and the cut beam 3. Also good.

  As described above, the adapter member 10 having the inclined surface (second surface 12) is bent up and interposed between the side surface 2 and the end surface of the beam 3 so that the beam 3 is bent upward. It can be bridged between a pair of upsets 2 in a state of being laid. Therefore, if the adapter member 10 of the present invention is used, the downward bending that occurs in the center in the longitudinal direction of the beam 3 can be suppressed.

In the adapter member 10 of the present invention, the camber angle θ ₁ of the second surface 12 with respect to the first surface 11 is preferably 0.5 to 20 degrees. In particular, the camber angle θ ₁ is preferably 1 to 20 degrees or 1.5 to 15 degrees. When the camber angle θ ₁ of the second surface 12 is less than 0.5 degrees, the downward deflection generated in the cut beam 3 cannot be effectively suppressed. On the other hand, if the camber angle θ ₁ exceeds 20 degrees, the cut beam 3 will be greatly bent upward and it will be difficult to bridge between the erections 2 and workability will be reduced. Therefore, it is appropriate that the camber angle θ ₁ is in the range of 0.5 to 20 degrees.

The adapter member 10 of the present invention further has a peripheral surface 13 that connects the first surface 11 and the second surface 12. In this case, in the adapter member 10, the angle θ ₂ formed by the first surface 11 and the peripheral surface 13 is a right angle, and the angle θ ₃ formed by the second surface 12 and the peripheral surface 13 is 70 degrees or more and 89.5 degrees or less. Preferably there is. In this way, by setting the angle formed by the first surface 11 and the peripheral surface 13 to be a right angle, it is possible to stabilize the structure of the mountain retaining structure incorporating the adapter member 10.

  The adapter member 10 of the present invention preferably further has a plurality of bolt holes 14 penetrating from the first surface 11 to the second surface 12. For example, if a bolt is inserted into the bolt hole 14 from the first surface 11 side, the adapter member 10 and the end surface of the beam 3 can be bolted together. Further, for example, if a bolt is inserted into the bolt hole 14 from the second surface 12 side, the adapter member 10 and the side surface of the provoked 2 can be bolted together. As described above, according to the adapter member 10 having the bolt holes 14, the erection 2 and the cut beam 3 can be connected with a simple structure.

The 2nd side surface of this invention is related with a mountain retaining structure. The mountain retaining structure according to the present invention includes at least a pair of erections 2, a cut beam 3 spanned between the pair of erections 2, and a side surface and a cutting edge of the pair of erections 2. And at least two adapter members 10 disposed between the end faces of the beam 3. The adapter member 10 has a first surface 11 on the flank 2 side and a second surface 12 on the cut beam 3 side facing the first surface 11, and the second surface 12 is in relation to the first surface 11. And has an inclined structure. In this way, by arranging the adapter members 10 having the inclined surfaces on both ends of the cut beam 3, the cut beam 3 is erected and bridged between 2 in a state of being bent upward. Therefore, it is possible to suppress the downward bending of the cut beam 3. In addition, between the two adapter members 10, it is good also as arrange | positioning only one cut beam 3, It is good also as arrange | positioning what bolted the several cut beam 3. As shown in FIG.

  In the mountain retaining structure according to the present invention, the second surface 12 is preferably joined to the end surface of the beam 3. Although another member can be interposed between the adapter member 10 and the cut beam 3, in such a case, the strength of the entire structure may be reduced. For this reason, it is preferable to join the second surface 12 of the adapter member 10 directly to the end surface of the cutting beam 3 (for example, bolt bonding) without interposing another member between the adapter member 10 and the cutting beam 3. .

  The mountain retaining structure according to the present invention preferably further includes a jack 6 that can be expanded and contracted in a direction in which an axial force is applied to the cut beam 3 between the erection 2 and the adapter member 10. By providing the jack 6, it is possible to appropriately adjust the upward bending state generated in the cut beam 3.

  ADVANTAGE OF THE INVENTION According to this invention, the downward bending which arises in the longitudinal center of a cut beam with a simple structure can be suppressed, and the length of a cut beam can be ensured long.

FIG. 1 is an external perspective view showing an example of an adapter member. FIG. 2 is a plan view and a cross-sectional view showing an example of an adapter member. FIG. 3 shows an example of a structure in which the adapter member is arranged between the belly and the beam. FIG. 4 schematically shows how the beam is bent by the action of the adapter member. FIG. 5 shows another example of the structure in which the adapter member is disposed between the erection and the cut beam. FIG. 6 is a cross-sectional view showing another example of the adapter member. FIG. 7 schematically shows an example of a structure connecting a plurality of cut beams. FIG. 8 is a plan view showing an example of a general mountain retaining structure. FIG. 9 is a diagram for explaining the problems of the conventional mountain retaining structure.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. This invention is not limited to the form demonstrated below, The thing suitably changed in the range obvious to those skilled in the art from the following forms is also included.

  In the present specification, when the expression “A to B” is used, it basically means “A or more and B or less”. Further, in the present application diagram, XYZ three-dimensional coordinates are shown for easy understanding of the three-dimensional structure of each article. The X-axis direction corresponds to the direction in which the cut beam is bridged between the pair of bulges, that is, the longitudinal direction of the cut beam. The Y-axis direction corresponds to the gravity direction (vertical direction). Further, the Z-axis direction corresponds to a direction perpendicular to the extending direction of the cut beam, that is, the longitudinal direction of the bulge.

  1 and 2 show an adapter member 10 according to an embodiment of the present invention alone. 1 is a perspective view of the adapter member 10, FIG. 2 (a) is a plan view of the adapter member 10, and FIG. 2 (b) is taken along the line II-II shown in FIG. 2 (a). It is sectional drawing. The adapter member 10 is a member that is disposed between the side surface of the abdomen and the end surface of the beam, and connects them directly or indirectly.

  If it demonstrates concretely, the adapter member 10 which concerns on this embodiment is comprised by the plate-shaped hexahedron. The adapter member 10 has a first surface 11 facing the upset 2, a second surface 12 facing the cut beam 3, and a peripheral surface 13 connecting the first surface 11 and the second surface 12. The first surface 11 and the second surface 12 are quadrangular surfaces, and are square in the illustrated example. Moreover, the 1st surface 11 and the 2nd surface 12 become a YZ surface. Moreover, in this embodiment, the adapter member 10 is a hexahedron. Therefore, the peripheral surface 13 includes an upper surface 13a that connects the upper sides of the first surface 11 and the second surface 12, a lower surface 13b that connects these lower sides, a left side surface 13c that connects these left sides, and a right side that connects these right sides. And a surface 13d. The plate-shaped adapter member 10 has a solid structure, and no space is formed between the surfaces 11 to 13. Since the adapter member 10 requires strength, the adapter member 10 is preferably made of a highly rigid metal such as steel.

As shown in FIGS. 1 and 2, the adapter member 10 has a structure in which the second surface 12 is inclined at a predetermined camber angle θ ₁ with respect to the first surface 11. As shown in FIG. 2B, the camber angle θ ₁ is an angle at which the second surface 12 is inclined when the first surface 11 is used as a reference. Although camber angle (theta) ₁ is not specifically limited, For example, it is preferable that it is 0.5-20 degree | times. In particular, the camber angle θ ₁ is preferably 1 to 20 degrees or 1.5 to 15 degrees. Further, it can be said that the second surface 12 has a negative camber angle with respect to the first surface 11. That is, the 2nd surface 12 inclines so that the space | interval with the 1st surface 11 may become large as it goes to the lower surface 13b side from the upper surface 13a side. For this reason, in the adapter member 10, the width of the lower surface 13b is larger than the width of the upper surface 13a.

More specifically, the adapter member 10 according to the present embodiment has an angle θ ₂ formed between the first surface 11 and the peripheral surface 13 (upper surface 13a / lower surface 13b) as shown in FIG. It becomes a right angle. On the other hand, the angle θ ₃ formed by the second surface 12 and the peripheral surface 13 (upper surface 13a / lower surface 13b) is less than 90 degrees. The formed angle θ ₃ corresponds to the above-described camber angle θ _1, and is preferably, for example, 70 to 89.5 degrees, particularly preferably 70 to 89 degrees or 75 to 88.5 degrees. . Thus, in the present embodiment, only the second surface 12 is an inclined surface.

  Although the size of the adapter member 10 is not particularly limited, it is preferable that at least the first surface 11 and the second surface 12 have an area larger than the end surface of a generally used cutting beam. For example, the size of the platform surface 11 and the second surface 12 may be about 150 mm wide × 150 mm long to about 600 mm wide × 600 mm long. However, the size of the 1st surface 11 and the 2nd surface 12 can be suitably adjusted according to the size of the end surface of the cut beam to be used. Moreover, what is necessary is just to let the thickness (minimum value) of the adapter member 10 be about 5-100 mm or 10 mm-50 mm.

  As shown in FIGS. 1 and 2, the adapter member 10 of the present embodiment has a plurality of bolt holes 14 that penetrate from the first surface 11 to the second surface 12 in the thickness direction. In the illustrated example, the adapter member 10 has 20 bolt holes 14a along the periphery thereof, and has 12 bolt holes 14b near the center thereof. For example, a bolt is inserted into the peripheral bolt hole 14a from the first surface 11 side. The bolt inserted from the first surface 11 side connects the adapter member 10 and the cut beam, for example. On the other hand, a bolt is inserted into the bolt hole 14b closer to the center from the second surface 12 side. The bolt inserted from the second surface 12 side connects, for example, the adapter member 10 and the erection. Thus, the adapter member 10 can be used for the purpose of connecting the erection and the cut beam. As will be described later, another member may be disposed between the adapter member 10 and the erection, or between the adapter member 10 and the beam.

  In the present embodiment, the case where the adapter member 10 has a hexahedral plate shape has been described as an example. However, the adapter member 10 of the present invention is not limited to such a form. For example, the first surface 11 and the second surface 12 may be circular, elliptical, triangular, or other polygonal shapes. Although the application is limited, the first surface 11 and the second surface 12 can be formed in a shape other than a quadrangle.

  Next, a description will be given of a mountain retaining structure in which the adapter member 10 is incorporated. As described above, FIG. 8 shows a general mountain retaining structure. The adapter member 10 of the present invention can also be applied to the mountain retaining structure as shown in FIG. When constructing a mountain retaining structure, a plurality of retaining walls 1 are first driven into the ground, and a region that is a rectangular parallelepiped (planar rectangular) working space is secured by these retaining walls 1. The plurality of retaining walls 1 are driven along the excavation direction (vertical direction) and are arranged in the horizontal direction to form a wall surface without a gap. In the example shown in FIG. 1, the two retaining walls 1 facing each other extend longer than the other two retaining walls 1, and as a result, the work space surrounded by the four retaining walls 10. Has a planar rectangular shape. As the retaining wall 1, a steel sheet pile of U shape, Z shape, H shape, or straight shape is preferably adopted. The retaining wall 1 may be SMW (Soil Mixing Wall) composed only of soil cement, or SMW composed of soil cement and a core material (H-shaped steel, etc.) embedded in the soil cement. Good. However, the retaining wall 1 may use other known members such as other steel shapes and concrete piles.

  After all the retaining walls 1 have been driven, the uplift 2 is joined so as to contact the four retaining walls 1 while excavating the work area surrounded by the retaining walls 1. The uprising 2 is joined to the retaining wall 1 and the uprising 2 is joined at the four corners of the retaining wall 1. As a joining method of each part, a known method such as bolt joining or welding can be adopted, but is not limited to these methods. When the joining of each erection 2 is completed, each erection 2 has a function of supporting the retaining wall 1. That is, even when a lateral pressure load such as earth pressure is applied to the retaining wall 1 from the excavation surface, the uplift 2 supports the retaining wall 1 from the inside, so that the inclination of the retaining wall 1 and the excavation surface Can prevent collapse. As the erection 2, a known shape steel such as I shape or H shape can be used. In addition, as shown in FIG. 8, when a long bulge 2 is adopted, a large bending moment acts on the central portion thereof. A plurality of cut beams 3 are installed so as to be bridged. At this time, in order to reinforce the joining state of the erection 2 and the beam 3, the fired beam 4 extending in an oblique direction so as to connect the side surface of the erection 2 and the side surface of the beam 3 can be bolted. . As the cut beam 3, a known member such as a steel pipe, a square steel pipe, a round steel pipe, or an H-shaped steel pipe can be used. By providing the cut beam 3, the uplift 2 can be reinforced by the cut beam 3 even when the length of the upset 2 is increased. For this reason, even when a lateral pressure load such as earth pressure is applied, it is possible to suppress the deformation of the upset 2.

  FIG. 3 shows an example in which an adapter member 10 having an inclined surface is incorporated into a general mountain retaining structure as described above. FIG. 3 is a cross-sectional side view of the mountain retaining structure, and shows an enlarged one end side of the beam 3. In the example of FIG. 3, the retaining wall 1, the erection 2, the cut beam 3, the auxiliary piece 5, and the adapter member 10 are shown as a part of the mountain retaining structure. As shown here, the adapter member 10 is disposed between the flank 2 and the cut beam 3, and the first surface 11 of the adapter member 10 is flared and faces the second side, and is a second inclined surface. The surface 12 faces the beam 3 side. More specifically, the second surface 12 (inclined surface) of the adapter member 10 is in direct contact with the end surface of the cut beam 3, and both are joined. On the other hand, the auxiliary piece 5 is interposed between the first surface 11 of the adapter member 10 and the erection 2. For this reason, the first surface 11 of the adapter member 10 is directly joined to the end face of the auxiliary piece 5, and the end face of the auxiliary piece 5 rises and is joined to the side face of 2. In this manner, another member such as the auxiliary piece 5 can be interposed between the adapter member 10 and the erection 2. The auxiliary piece 5 is a member arranged for the purpose of adjusting the length of the cut beam 3 in order to fill a gap formed between the side surface of the erection 2 and the end surface of the cut beam 3. As the auxiliary piece 5, a known member such as a steel pipe, a square steel pipe, a round steel pipe, or an H-shaped steel pipe can be used as in the case of the cut beam 3.

  FIG. 3 shows only one end side of the cut beam 3 in an enlarged manner. Similarly, the other end side of the cut beam 3 is inclined between the side surface of the bulging 2 and the end surface of the cut beam 3. An adapter member 10 having the above is disposed. In FIG. 4, the example of the structure which has arrange | positioned the adapter member 10 to the both ends of the one cut beam 3 is shown typically. As shown in FIG. 4, the second surfaces 12 (inclined surfaces) of the adapter member 10 are in contact with the end surfaces of both ends of the cut beam 3. For this reason, when it is assumed that the beam 3 is not affected by gravity at all, the entire beam 3 is bent in an arc shape upward. For this reason, assuming that the cut beam 3 is affected by gravity, it is considered that the beam 3 extends substantially straight along its longitudinal direction 100 million as shown by the dotted line in FIG. As described with reference to FIG. 9, the conventional cut beam 3 has a problem that when it is affected by gravity, the central portion in the longitudinal direction is greatly bent downward. On the other hand, as shown in FIG. 4, it is possible to suppress such downward deflection by attaching adapter members 10 having inclined surfaces at both ends of the beam 3. In particular, when only one cutting beam 3 is arranged between the two adapter members 10, the cutting beam 3 forms an upward arc shape as shown in FIG.

  FIG. 5 shows various methods for incorporating the adapter member 10 into the mountain retaining structure. In the example shown in FIG. 5A, the first surface 11 of the adapter member 10 rises and is directly joined to the side surface of the adapter 2, and the second surface 12 of the adapter member 10 is joined directly to the end surface of the cut beam 3. Yes. In this way, the structure in which the adapter member 10 is directly joined to the bulge 2 and the cut beam 3 is the simplest structure in the present invention.

  In the example shown in FIG. 5B, the second surface 12 of the adapter member 10 is directly joined to the end surface of the cut beam 3, but between the first surface 11 of the adapter member 10 and the flank 2, Two auxiliary pieces 5 are arranged, and a jack 6 is arranged between the auxiliary pieces 5. In this example, the first auxiliary piece 5 is joined to the side surface of the flank 2, the jack 6 is joined to the first auxiliary piece 5, and the second auxiliary piece 5 is joined to the jack 6. The first surface 11 of the adapter member 10 is joined to the second auxiliary piece 5, and the end surface of the beam 3 is joined to the second surface 12 of the adapter member 10. Thus, it is possible to install a plurality of articles between the adapter member 10 and the upset 2.

  The jack 6 has a function that can be expanded and contracted along the longitudinal direction of the cut beam 3, and is disposed between the raised beam 2 and the cut beam 3 for the purpose of introducing an axial force to the cut beam 3. . By operating the jack 6 to introduce a certain axial force to the beam 3, it is possible to firmly support the opposing mountain retaining walls without loosening of each joint. An example of the jack 6 is a hydraulic jack or a screw jack. In particular, in the present invention, the bending degree of the cut beam 3 can be appropriately adjusted by expanding and contracting the jack 6. That is, by extending the jack 6 long and increasing the axial force applied to the cut beam 3, the longitudinal center of the cut beam 3 can be greatly bent upward. On the other hand, when the jack 6 is contracted to weaken the axial force applied to the beam 3, the bending generated in the beam 3 is reduced. Thus, in order to appropriately adjust the bending degree of the beam 3, it is preferable in the present invention to introduce the jack 6 to at least one end side of the beam 3.

  In the example shown in FIG. 5 (c), the second surface 12 of the adapter member 10 is directly joined to the end surface of the beam 3, but between the first surface 11 of the adapter member 10 and the flank 2, An auxiliary beam member 7 is arranged. Examples of the auxiliary beam member 7 include a steel pipe, a square steel pipe, a round steel pipe, and an H-shaped steel pipe. When the auxiliary piece 5 cannot bulge between the upset 2 and the cut beam 3, an auxiliary cut beam member 7 having a relatively long scale is arranged as shown in FIG. 5 (c). do it.

  Although not shown in FIG. 5, other members (such as the auxiliary piece 5) can also be disposed on the second surface 12 of the adapter member 10 and the end surface of the beam 3. Thus, the adapter member 10 according to the present invention is not required to be in direct contact with the side surface of the flank 2 or the end surface of the cut beam 3.

  FIG. 6 shows another embodiment of the adapter member 10. In the example shown in FIG. 6, the adapter member 10 has a hollow structure in which a space 15 is held between the first surface 11 and the second surface 12. For example, the adapter member 10 having a hollow structure may be formed by processing a known member such as a steel pipe, a square steel pipe, a round steel pipe, or an H-shaped steel pipe and making the surface on the side of the cut beam 3 an inclined surface. it can. The adapter member 10 having such a hollow structure has an advantage that it is relatively easy to ensure the length. For this reason, for example, in the example shown in FIG. 5B, the plate-shaped (solid structure) adapter member 10 and the auxiliary piece 5 are disposed in combination between the beam 3 and the jack 6. In the example shown in FIG. 6, it is possible to omit the auxiliary piece 5 between the cut beam 3 and the jack 6 by adopting a hollow adapter member 10 having a certain length. Thus, by using the adapter member 10 having a hollow structure obtained by processing a steel pipe or the like, the number of articles constituting the mountain retaining structure can be reduced.

  FIG. 7 shows an example of a structure in which a plurality of cutting beams 3 are connected between two adapter members 10. As described above, when the adapter member 10 of the present invention is used, the cut beam 3 forms an upward arch, but when a plurality of cut beams 3 are used, the cut beams 3 are joined together. Need to be devised. In the example shown in FIG. 7A, both or both end surfaces of the cut beams 3 to be joined to each other are inclined surfaces so that both end surfaces are in close contact with each other. In this way, the end surfaces of the cut beams 3 are in contact with each other by applying an end surface of the cut beams 3 to the inclined surface, so that the bolts can be easily joined to each other.

  In the example shown in FIG. 7B, both end surfaces of the cut beams 3 to be joined to each other are vertical surfaces. For this reason, there is a possibility that a gap will be formed between the end faces when trying to join the cut beams 3 together. Therefore, as shown in FIG. 7B, by inserting the wedge member 8 between the end faces of the cut beam 3, a gap generated between these end faces can be filled. In this case, a bolt hole is also formed in the wedge member 8, and it is possible to join the bolt in a state in which the wedge member 8 is inserted between the end faces of the beam 3.

  As mentioned above, in this specification, in order to express the content of this invention, embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  The present invention relates to a structure of a mountain retaining structure used for preventing a ground excavation surface from collapsing and an adapter member incorporated in the structure. Therefore, the present invention can be suitably used in the civil engineering / architecture industry mainly for temporary construction of support works for mountain retaining.

DESCRIPTION OF SYMBOLS 1 ... Earth retaining wall 2 ... Raising 3 ... Cutting beam 4 ... Fire-beam 5 ... Auxiliary piece 6 ... Jack 7 ... Auxiliary cutting beam member 8 ... Wedge member 10 ... Adapter member 11 ... First surface 12 ... Second surface 13 ... Surface 14 ... Bolt hole 15 ... Space

Claims (6)

An adapter member (10) disposed between the side of the flank (2) and the end face of the beam (3),
A first surface (11) on the side of the erection (2);
A second surface (12) on the side of the beam (3) facing the first surface (11),
The adapter member, wherein the second surface (12) is inclined with respect to the first surface (11). The adapter member according to claim 1, wherein a camber angle (θ ₁ ) of the second surface (12) with respect to the first surface (11) is not less than 0.5 degrees and not more than 20 degrees. The adapter member according to claim 1, further comprising a plurality of bolt holes (14) penetrating from the first surface (11) to the second surface (12). At least a pair of upsets (2);
A beam (3) spanned between the pair of erections (2);
A mountain retaining structure comprising at least two adapter members (10) disposed between a side surface of the pair of erections (2) and an end surface of the beam (3),
The adapter members (10) are respectively
A first surface (11) on the side of the erection (2);
A second surface (12) on the side of the beam (3) facing the first surface (11),
The mountain retaining structure in which the second surface (12) is inclined with respect to the first surface (11). The mountain retaining structure according to claim 4, wherein the second surface (12) is directly joined to an end surface of the beam (3). The jack (6) further disposed between the erection (2) and the adapter member (10) and capable of expanding and contracting in a direction in which an axial force is applied to the cut beam (3). Yamato support construction described.

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