THE EMBEDED PLATE Technical Field [1] The present invention relates a sheeting board, and more particularly to a sheeting board that may uniformly disperse bending moment of soil pressure applied to a rear side of the sheeting board and firmly support an insert of a lamination connection support plate without driving a wedge into a groove of H beam so as to prevent soil wall from being collapsed after digging the ground in excavation or tunnel construction or so as to prevent a wall of the sheeting board from being broken down due to soil pressure at the center of the sheeting board. Background Art [2] Generally, after digging out soil in the base construction of a building or the un¬ derground construction, H-beam pillars are driven at regular intervals in contact with the surface of a cut soil and then walls of sheeting boards are laminated between the H beams in a simple way with both ends being movable, such that surrounding earth and sand are not flowed down or collapsed. These sheeting boards are easily deformed or broken down due to absorption of water when they are made of woods, so recently a lamination connection support plate shaped as a wall of the sheeting board and made of steels or plastics has been proposed. [3] However, the conventional lamination connection support plate has a constant section modulus in a length direction, so it may not suitably cope with different bending moments according to positions of boards, thereby increasing product costs and weight. That is to say, in a simple shape, the biggest bending moment is generated at the center portion and relatively smaller bending moment is generated at both ends. However, though the bending moment is differentiated along the position in a length direction, the conventional lamination connection support plate gives the same bending moment since it is formed to have the same section modulus as a whole. [4] In the lamination connection support plate for a sheeting board in a simple shape, the maximum bending moment M is generated at the center, and the bending moment is minimized at both ends of the lamination connection support plate. To cope with the bending moment applied to the lamination connection support plate, a bending moment of the lamination connection support plate itself should be greater than a bending moment applied from outside by dispersing the bending moment so that stress (or, strength) of members and the acted bending moment may be dealt according to their magnitudes. The stress (or, strength) of the member is determined according to its material, so the bending moment of the member should be increased greater than a requested bending moment by exchanging the material or dispersing the bending moment. [5] Thus, in order to suitably answer the bending moment changing along a length in a lateral direction, the bending moment should be suitably dispersed according to the change of the bending moment, which resultantly determines overall durability and quality of the product. [6] Since a bending moment is determined according to the shape of section, a shape for multiplying such bending moment to suitably disperse the bending moment at each portion should be considered. In addition, if the shape is differently formed to cope with magnitudes of the acted bending moment, the maximum effects may be obtained using the minimum material. [7] However, the conventional lamination connection support plate has the center portion and edges in the same horizontal surface regardless of bending moment changing at each portion, so unnecessary portions always exist. Thus, the prior art has several problems as follows. That is to say, since the bending moment at edges is identical to that required at the center portion, there is caused unnecessary loss. Namely, there are a lot of losses of material, resources, power, energy and labor costs in manufacturing a lamination connection support plate against a bending moment of the same soil pressure, and there are caused many difficulties for carrying and assembling. [8] In addition, when the conventional lamination connection support plates are installed in multi stages, bending moment and shear stress are added to a lamination connection support plate installed in a lower stage due to unnecessary weight of themselves, which may cause fraction or deviation of the lamination connection support plate, resulting in tragic accidents. [9] FlG. 5 shows a conventional sheeting board, which is in use. A sheeting board 2 inserted between H beams 1 plays a role of preventing soil on its rear side from flowing down to a front side. [10] At this time, if the ground at the rear side is soft, or due to various reasons, a lower sheeting board 2 is exposed to more pressure in a front direction. [11] Thus, the sheeting board 2 may be broken down or bent due to the pressure, and then deviated from the H beams 1. Disclosure of Invention Technical Problem [12] The present invention is designed in consideration of the above problems, and therefore it is an object of the invention to provide a lamination connection support plate capable of dispersing bending moments at each position in accordance with magnitude of the acted bending moment at each position. [ 13] Another object of the invention is to provide a lamination connection support plate capable of enduring the same bending moment and minimizing fluctuation of the lamination connection support plate since an insert of the lamination connection support plate is firmly inserted into a groove of the H beam. Technical Solution [14] In order to accomplish the above object, the present invention provides a sheeting board, which includes a plurality of H beams installed to be spaced apart from each other and having a groove unit including a web positioned at a center, a first flange connected to one end of the web, and a second flange connected to the other end of the web; and [15] a plurality of lamination connection support plates laminated vertically in the groove units of the plurality of H beams and forming an arc at a predetermined angle rearward inside the sheeting board so as to uniformly disperse bending moment of soil pressure applied to a rear side of the sheeting board, [16] wherein at least one bent porous steel plate having a plurality of holes and protrusions integrally formed is provided to the lamination connection support plates and inserts at both ends of the lamination connection support plates in a length direction. [17] In another aspect of the invention, there is also provided a sheeting board, which includes a plurality of H beams installed to be spaced apart from each other and having a groove unit including a web positioned at a center, a first flange connected to one end of the web, and a second flange connected to the other end of the web; [18] a plurality of lamination connection support plates laminated vertically in the groove units of the plurality of H beams and forming an arc at a predetermined angle rearward inside the sheeting board so as to primarily disperse bending moment of soil pressure applied to a rear side of the sheeting board; and [19] concave inserts formed at both ends of the lamination connection support plates so as to slidably support the lamination connection support plates inside the first flange of the H beams so that the bending moment of soil pressure is secondarily dispersed, [20] wherein at least one bent porous steel plate having a plurality of holes and protrusions integrally formed is provided to the lamination connection support plates and inserts at both ends of the lamination connection support plates in a length direction, and the lamination connection support plates and the inserts thereof are made of PE or PP artificial woods made by extruding synthetic resin including wasted plastics. [21] In addition, in the present invention, a concave bottom surface of the insert is supported by the inner side of the first flange to secondarily disperse the bending moment of soil pressure, an end section thereof forming a concave shape is supported by the second flange and the web of the groove unit of the H beams to thirdly disperse the bending moment of soil pressure, and as a result the insert is firmly engaged by the first flange, the second flange and the web of the groove unit of the H beams to prevent fluctuation of the lamination connection support plate. [22] In particular, a section modulus at the center portion where the bending moment is greatest is formed greatest, and the section modulus is decreased toward both ends so that the section modulus is suitable for the bending moment, which may exhibit maximum bending moment with minimum weight. Thus, a lamination connection support plate that may exhibit a required bending moment with minimum material, labor and manufacture costs is provided. Brief Description of the Drawings [23] FlG. 1 is a perspective view showing a lamination connection support plate according to a first embodiment of the present invention; [24] FlG. 2 shows a sheeting board according to the first embodiment of the present invention, which is in use; [25] FlG. 3 is a perspective view showing a lamination connection support plate according to another embodiment of the present invention; [26] FlG. 4 shows a sheeting board according to second embodiment of the present invention, which is in use; and [27] FlG. 5 shows a conventional sheeting board, which is in use. Best Mode for Carrying Out the Invention [28] he present invention will be described in detail so that persons skilled in the air may easily understand and reproduce the invention. [29] FlG. 1 is a perspective view showing a lamination connection support plate according to a first embodiment of the present invention, and FlG. 2 shows a sheeting board according to the first embodiment, which is in use. The sheeting board includes a plurality of H beams 1 installed to be spaced apart from each other and having a groove unit including a web 11 positioned at a center, a first flange 12 connected to one end of the web 11, and a second flange 13 connected to the other end of the web 11; and [30] a plurality of lamination connection support plates 22 laminated vertically in the groove units of the plurality of H beams 1 and forming an arc at a predetermined angle rearward inside the sheeting board so as to uniformly disperse bending moment of soil pressure applied to a rear side of the sheeting board, [31] wherein at least one bent porous steel plate 23 having a plurality of holes and protrusions integrally formed is provided to the lamination connection support plates 22 and inserts 21 at both ends of the lamination connection support plates 22 in a length direction. [32] Thus, the pressure of soil applied at the rear is dispersed to both ends by means of the lamination connection support plates 22 formed in an arc shape, so the sheeting board may give a supporting force against more pressure effectively rather than a con¬ ventional sheeting board made of wood. [33] In addition, this configuration may prevent the inserts 21 at both ends from deviating from the H beams 1 due to deformation, though it is made of woods that is little deformed. [34] In addition, the inserted bent porous steel plates 23 have a plurality of holes and protrusions, which may give a maximum resistance against a bending force caused by pressure. In addition, the porous positions are filled with resin to integrate the entire configuration, and one or two bent porous steel plates may be inserted. [35] Also, the inserts 21 of the sheeting board 2 and the lamination connection support plates 22 are made of artificial woods made by extruding synthetic resin such as wasted plastics, which reduces costs rather than natural woods and allows to easily form the bent porous steel plate 23 therein. [36] That is to say, if the bent porous steel plate 23 is inserted together during the initial extrusion, the bent porous steel plate 23 may be positioned therein without any separate additional process. [37] The artificial wood may be PE wood or PP wood. In case of natural wood, a lot of wood pieces are remained after making the above configuration, and a resistance against stress is not increased beyond a certain limit of the corresponding wood. In addition, the natural wood is apt to be partially split along grain of wood. [38] However, the artificial wood may form an optimized grain artificially, and the bent porous steel plate 23 or a porous steel plate may be easily inserted therein, allowing better properties than the natural wood. [39] In addition, a person skilled in the art may devise various modifications having minimized deformation against pressure and improved durability by adding or inserting other reinforcing materials in addition to the above-mentioned bent porous steel plate or the porous steel plate. [40] As an example, a generally steel plate may be inserted instead of the bent steel plate. In this case, since the lamination connection support plate 22 is curved, the steel plate is curved accordingly so that a resistance against inward pressure is maximized at a convex portion, which gives sufficient effects. In the same principle, such effects may be obtained when reinforcing bars or the like are inserted. [41] FIG. 3 is a perspective view showing a lamination connection support plate according to another embodiment of the present invention. In order to facilitate easier work for laminating and assembling the sheeting board 2 to the H beams 1, the inserts 21 at both ends have a vertical plane at a front portion so that the vertical plane is closely adhered to a rear side of the first and second flanges (12, 13) positioned at the front thereof, and upper and lower surfaces of the inserts 21 form horizontal planes perpendicular to the vertical plane. [42] In addition, in the above configuration, most pressure at the rear is dispersively con¬ centrated to the front portion of the insert 21. Thus, if the front portion of the insert 21 forms a plane so that it may be closely adhered to the H beams 1 to be slidable, it may be prevented that load is concentrated on a partial region to cause a partial breakdown. [43] Also, if one side of the insert 21 forms a plane adjacent to the web 11, the lamination connection support plate 22 is spread inward to some extent due to a constant pressure, extending a distance from both inserts 21. Accordingly, if pressure is applied, the sheeting board 2 is more firmly adhered and fixed. In addition, the sheeting boards 2 adjacent to each other between the H beams may not be bent any more since pressure is acted on both ends. [44] FlG. 4 is a perspective view showing a sheeting board according to a second embodiment of the present invention. [45] As shown in FlG. 4, this embodiment is substantially identical to the first embodiment except that an insert 15 of the sheeting board 2 has a concave shape. [46] That is to say, a plurality of H beams 1 are installed to be spaced apart from each other, and have a groove unit including the web 11 positioned at the center, the first flange 12 connected one end of the web 11, and the second flange 13 connected to the other end of the web 11. [47] A plurality of lamination connection support plates 22 are laminated and installed vertically in the groove units of the H beams 1 spaced apart from each other, and forms an arc at a predetermined angle rearward inside the sheeting board so as to primarily disperse bending moment of soil pressure applied to a rear side of the sheeting board. [48] The concave inserts 15 are formed at both ends of the lamination connection support plates 22 so as to slidably support the lamination connection support plates 22 inside the first flange 12 of the H beams so that the bending moment of soil pressure is secondarily dispersed. [49] At least one bent porous steel plate 23 having a plurality of holes 24 and protrusions to reinforce strength is inserted into the lamination connection support plates 22 and the inserts 15, and the lamination connection support plates 22 and the inserts 15 thereof are made of PE or PP artificial woods made by extruding synthetic resin such as wasted plastics. [50] In addition, a concave bottom surface of the insert 15 is supported by the inner side of the first flange 12 to secondarily disperse the bending moment of soil pressure, an end section thereof forming a concave shape is supported by the second flange 13 and the web 11 of the groove unit of the H beams to thirdly disperse the bending moment of soil pressure, and as a result the insert 15 is firmly engaged by the first flange 12, the second flange 13 and the web 11 of the groove unit of the H beams to prevent fluctuation of the lamination connection support plate 22. Industrial Applicability [51] As described above, the sheeting board of the present invention forms a certain arc inward, so it is not broken down due to pressure applied inward from outside and it is prevented that the sheeting plate is deformed and deviated from the H beams. [52] In addition, a steel plate having a plurality of holes and protrusions and extended in a lateral direction is inserted to prevent the sheeting board from being deformed or broken down due to pressure, which may restrict deformation to the minimum. [53] Moreover, since the inserts at both ends of the lamination connection support plate of the sheeting board are firmly engaged with the first flange, the second flange and the web of the groove unit of the H beams, fluctuation of the lamination connection support plate may be prevented.
Title:
THE EMBEDED PLATE
Document Type and Number:
WIPO Patent Application WO/2006/022483
Kind Code:
A1
Abstract:
Disclosed is a sheeting board that may uniformly disperse bending moment of soil pressure applied to a rear side of the sheeting board and firmly support inserts of a lamination connection support plate without driving a wedge into a groove of H beam. The sheeting board includes H beams spaced apart and having a groove unit including a web at a center, and first and second flanges connected to the web, and lamination connection support plates laminated vertically in the groove units of the H beams and forming an arc at a predetermined angle rearward inside the sheeting board to uniformly disperse bending moment of soil pressure applied to a rear side of the sheeting board. At least one bent porous steel plate having holes and protrusions integrally formed is provided to the lamination connection support plates and inserts at its both ends in a length direction.
Inventors:
Soo Won JO. (305-202 Daecheong Apt, 12 Gaepo-dong Gangnam-gu, Seoul 135-940, KR)
Application Number:
PCT/KR2005/002455
Publication Date:
March 02, 2006
Filing Date:
July 28, 2005
Export Citation:
Assignee:
Soo Won JO. (305-202 Daecheong Apt, 12 Gaepo-dong Gangnam-gu, Seoul 135-940, KR)
International Classes:
E02D17/04; (IPC1-7): E02D17/04
Attorney, Agent or Firm:
Lee, Dong Ki (601 Daegun Bldg, 822-5 Yeoksam-dong Gangnam-gu, Seoul 135-080, KR)
Description:
Description