Opening width fixing device for earth and sand barrier

Abstract

To provide an opening width-fixing device for an earth and sand shut-off device, which is used in addition to the earth and sand shut-off device disclosed in patent Patent No. 6431239, to thereby suppress the closing operation of the earth and sand shut-off device, and which can cope with trench excavation work having a depth ranging from 1.5 meters to 2.0 meters.SOLUTION: According to a first aspect of the present invention, there is provided an opening width fixing device for an earth and sand barrier, the opening width fixing device being used in association with an earth and sand barrier in which a pair of rectangular frames are rotatably connected to each other in a substantially X-shape in a front view, and a sheet member is stretched between an upper frame member of one of the rectangular frames and a lower frame member of the other rectangular frame.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a device for fixing a sediment blocking device used in conjunction with a sediment blocking device used to prevent work-related accidents in construction work involving small-scale trench excavation, such as construction work for water supply, sewerage, telecommunications facilities, gas supply facilities, etc. (hereinafter referred to as "water supply and sewerage construction work, etc."), and more specifically to a device for fixing the transverse opening width of an excavated trench in which the sediment blocking device is installed. [Background technology]

[0002] In water supply and sewerage works that involve small-scale trench excavation work, in order to prevent industrial accidents caused by landslides during trench excavation and work inside the trench, retaining shoring may be installed prior to work inside the trench. Specifically, excavation is performed (open excavation) using a drag shovel, and then lightweight steel sheet piles are erected so that they are attached to the excavation surface, and wales and struts are attached to assemble the retaining shoring.

[0003] On the other hand, trench construction less than 1.5 meters deep (trench excavation and work within the excavated trench) is not subject to the "Guidelines for Precedent Earth Retaining Construction Methods (Kihatsu No. 1217001)," and therefore sheet piles and other earth retaining structures are often not used. Therefore, the present applicant developed the sediment blocking device disclosed in Patent Document 1 to prevent industrial accidents during trench construction less than 1.5 meters deep. As shown in Figure 7, this sediment blocking device is configured by connecting a pair of square frames 1 and 2 rotatably in a roughly X-shaped configuration in a front view, and by stretching sheet members 3 between the upper frame member 1a of square frame 1 and the lower frame member 2b of square frame 2, and between the upper frame member 2a of square frame 2 and the lower frame member 1b of square frame 1, respectively. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 6431239 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] The present invention provides the following items.

[0006] (Item 1) An opening width fixing device used in conjunction with a sediment blocking device in which a pair of square frames are rotatably connected in a form that is approximately X-shaped when viewed from the front, and sheet members are stretched between the upper frame member of one square frame and the lower frame member of the other frame, An opening width fixing device for a sediment blocking device, comprising a support pillar with an engaging portion, an engaging member that can be engaged with both the upper frame material of the square frame and the engaging portion, and a fixing member attached to the lower part of the support pillar.

[0007] (Item 2) Item 1. An opening width fixing device for a sediment blocking device, wherein the engaging portion is formed in a sawtooth shape.

[0008] (Item 3) Item 1. An opening width fixing device for a sediment blocking device, wherein the fixing member is a steel material having a substantially U-shape when viewed from the front.

[0009] (Item 4) The opening width fixing device for the sediment blocking device described in item 1, wherein the engaging portion is formed in a sawtooth shape and the fixing member is made of steel material that is approximately U-shaped when viewed from the front.

[0010] (Item 5) An opening width fixing device for a sediment blocking device according to item 1 or 2, in which an L-shaped angle having a hole on one side through which a support pole can be inserted is used as the locking member.

[0011] (Item 6) An opening width fixing device for a sediment blocking device according to item 3 or 4, wherein an L-shaped angle having a hole on one side through which a support pole can be inserted is used as the locking member.

[0012] (Item 7) A retaining construction method characterized by fixing the sediment blocking device using the opening width fixing device described in any one of items 1 to 6, and fitting a sheet pile between the sediment blocking device and the wall surface of the excavation trench.

[0013] As mentioned above, in trench construction less than 1.5 meters deep, retaining supports are often not installed. Furthermore, Article 356 of the Industrial Safety and Health Regulations stipulates that for "other ground," the upper limit for manual vertical excavation is less than 2 meters deep, so open excavation up to a depth of less than 2 meters is legally permitted.

[0014] However, the sediment blocking device described in Patent Document 1 was developed on the premise of trench construction less than 1.5 meters deep, and cannot be used for trench construction of 1.5 meters or more. Therefore, the applicant experimentally verified that installing a sheet pile 6 between the sediment blocking device 4 and the wall surface 5a is effective in preventing damage when the excavation trench 5 is less than 2 meters deep, as shown in Figure 6.

[0015] However, even in the above case, the collapsed soil pushed against the sediment blocking device 4 via the sheet piles 6, and the horizontal force indicated by arrow D caused the square frames 1 and 2 to close in the directions of arrows A and B in the figure. This closing movement of the square frames 1 and 2 was limited by the tension generated when the sheet member 3 of the sediment blocking device 4 was fully stretched in the vertical direction.

[0016] In other words, by using the sheet piles 6 in combination, the working space inside the sediment blocking device 4 is narrowed to a certain extent, It was verified that it is possible to prevent work-related accidents caused by landslides, such as workers inside the landslide blocking device 4 being buried alive by collapsing soil.

[0017] However, as described above, the closing operation narrows the working space inside the sediment blocking device 4. In order to ensure a large working space in the sediment blocking device 4, the closing operation of the square frames 1 and 2 must be suppressed.

[0018] Therefore, the present invention aims to provide an opening width fixing device for a sediment blocking device that can be used in addition to the sediment blocking device described in Patent Document 1 above, to suppress the closing operation and thereby prevent work-related accidents caused by landslides even in trench excavation work in the range of 1.5 to 2.0 meters. [Means for solving the problem]

[0019] The present invention, which achieves the above object, has the following configuration.

[0020] (1) The opening width fixing device of the sediment blocking device described in claim 1 is an opening width fixing device used in conjunction with a sediment blocking device in which a pair of square frames are rotatably connected in a form that is approximately X-shaped when viewed from the front (for example, when viewed from a direction perpendicular to the paper surface of Figure 1), and a sheet member is stretched between the upper frame member of one square frame and the lower frame member of the other frame, and is composed of a support with an interlocking portion, an interlocking member that can be interlocked with both the upper frame member of the square frame and the interlocking portion, and a fixing member attached to the lower part of the support.

[0021] (2) The opening width fixing device for the sediment blocking device described in claim 2 is the same as the invention described in claim 1, except that the engaging portion is formed in a sawtooth shape.

[0022] (3) The opening width fixing device for the sediment blocking device described in claim 3 is the invention described in claim 1, wherein the fixing member is made of a steel material having a substantially U-shape when viewed from the front.

[0023] (4) The opening width fixing device of the sediment blocking device described in claim 4 is the invention described in claim 1, in which the engaging portion is formed in a sawtooth shape and the fixing member is made of steel material that is approximately U-shaped when viewed from the front.

[0024] (5) The opening width fixing device for the sediment blocking device described in claim 5 is configured using an L-shaped angle as the locking member in the invention described in claim 1 or claim 2, one side of which has a hole through which a support can be inserted.

[0025] (6) The opening width fixing device for the sediment blocking device described in claim 6 is configured using an L-shaped angle as the locking member in the invention described in claim 3 or claim 4, one side of which has a hole through which a support can be inserted.

[0026] (7) The retaining wall construction method described in claim 7 is such that the opening width fixing device of the sediment blocking device fixes the sediment blocking device using the opening width fixing device described in any one of claims 1 to 6, and a sheet pile is fitted between the sediment blocking device and the wall surface of the excavation trench. [Effects of the Invention]

[0027] How the present invention configured as above works to solve the problems will be outlined with reference to the drawings.

[0028] FIG. 2 shows the state in which the opening width fixing device 10 according to the present invention is attached to the sediment blocking device 4. The locking member 20 is locked to the upper frame member 1a of the square frame 1 and to the locked portion 12 of the support 11. Therefore, even if a horizontal force in the direction of arrow D is applied to the sheet material 3, the square frame 1 is prevented from rotating in the closing direction indicated by arrow A.

[0029] Furthermore, the fixing members 30 provided at the bottom of the support columns 11 prevent the lower frame member 2b of the rectangular frame 2 from rotating in the direction of arrow C. Accordingly, the upper frame member 2a is prevented from rotating in the closing direction indicated by arrow B.

[0030] In this way, according to the present invention, it is possible to prevent the square frames 1, 2 from closing, thereby ensuring a wide working space for the sediment blocking device 4. In the embodiment shown in FIG. 2, the locked portion 12 is provided facing the opposite direction to the direction in which the fixing member 30 is arranged relative to the support 10, but the locked portion 12 may be provided in the same direction as the fixing member 30. In that case, the insertion direction of the locking member 20 when inserted into the support 10 will need to be changed. A preferred embodiment is the form shown in FIG. 2. This form makes it possible to prevent the acute angles of the locked portion 12 from damaging the sheet material 3.

[0031] Next, the retaining wall construction method according to claim 7 will be outlined using Figure 1. A sediment blocking device 4 is installed in an excavation trench 5, and an opening width fixing device 10 prevents the square frames 1, 2 from rotating. Next, a sheet pile 6 is fitted between the wall surface 5a and the sediment blocking device 4. This construction method makes it possible to effectively prevent damage to an excavation trench 5 having a depth of 2 meters. Although the above description explains that the sheet pile 6 is fitted after the installation of the sediment blocking device 4, the order is not limited to this, and the sediment blocking device 4 may be installed after the sheet pile 6 is installed. [Brief explanation of the drawings]

[0032] [Figure 1] 1 is a diagram illustrating the construction method according to the present invention. [Figure 2] FIG. 1 is an explanatory diagram illustrating an embodiment of the present invention. [Figure 3] FIG. 1 is an explanatory diagram illustrating an embodiment of the present invention. [Figure 4] F Front view of the support P Same, top view B Same, bottom view R Same, right side view L Same, left side view [Figure 5] A perspective view of a locking member [Figure 6] Diagram explaining conventional construction method [Figure 7] Perspective view of the sediment blocking device DETAILED DESCRIPTION OF THE INVENTION

[0033] Preferred embodiments of the present invention will be described below with reference to the drawings. However, the embodiments of the components of the present invention are not limited to the following embodiments, and various forms may be adopted as long as they fall within the technical scope of the present invention.

[0034] FIG. 4 shows a support 11 to which a fixing member 30 is attached. The support 11 is formed of a steel material that is roughly U-shaped in plan view. Examples of steel materials that can be used include, but are not limited to, aluminum steel. A pair of raised portions 11a, 11a of this steel material are provided with engaging portions 12. In the figure, the engaging portions 12 are formed with sawtooth-like notches extending longitudinally. This illustrates an embodiment described in claim 2, but the present invention is not limited to such a configuration. For example, multiple discontinuous notches may be provided. Providing the engaging portions 12 extending longitudinally continuously allows the position at which the engaging member 20 is engaged to be adjusted vertically. Therefore, engaging the engaging member 20 with the upper engaging portion 12, as shown in FIG. 3, can accommodate a trench 5 with a narrow width.

[0035] A fixing member 30 is fixed to the lower end of the support 11 with a bolt and nut 31. This fixing member 30 is made of steel material and has a roughly U-shape when viewed from the front. This shows an embodiment in claim 3 etc., but of course it is not limited to this and is not limited to this. For example, a steel material that is arc-shaped when viewed from the front may be used.

[0036] As shown in FIG. 5, the locking member 20 is configured using an L-shaped angle with one piece 21 and another piece 22 extending in a direction substantially perpendicular to the one piece 20. The one piece 21 has a hole 23 through which the support 11 can be inserted. Furthermore, to facilitate smooth insertion into the support 10 and smooth engagement and / or release with the locked portion 12, the hole 23 is preferably larger than the cross section of the support 10. The other piece 22 is used by being locked to the upper frame member 1a of the rectangular frame 1 or the upper frame member 2a of the rectangular frame 2. The embodiment shown in FIG. 5 illustrates the fifth aspect of the present invention, but is not limited to such a configuration. For example, the other piece 22 may be formed in an arc shape, different from that shown in FIG. 5.

[0037] Fig. 1 illustrates the construction method according to claim 7. As described above, the earth and sand blocking device 4 is installed in the excavation trench 5, the opening width fixing device 10 prevents the square frames 1 and 2 from rotating, and the sheet pile 6 is fitted between the wall surface 5a and the earth and sand blocking device 4. [Explanation of symbols]

[0038] 1. Square frame 1a Upper frame material 1b...Lower frame material 2. Square frame 2a...Top frame material 2b...Lower frame material 3. Sheet material 4. Sediment blocking device 5. Excavation trench 5a Wall 6. Yaita 10...Aperture width fixing device 11...post 11a Rising part 12...Locked part 20...Locking member 30 Fixing member 31 Bolts and nuts

Claims

1. An opening width fixing device used in conjunction with a sediment blocking device, which comprises a pair of square frames rotatably connected in a form that is substantially X-shaped when viewed from the front, and a sheet member stretched between the upper frame member of one square frame and the lower frame member of the other frame, An opening width fixing device for a sediment blocking device, comprising a support pillar with an engaging portion, an engaging member that can be engaged with both the upper frame material of the square frame and the engaging portion, and a fixing member attached to the lower part of the support pillar.

2. 2. The opening width fixing device for a sediment blocking device according to claim 1, wherein the engaging portion is formed in a sawtooth shape.

3. 2. The opening width fixing device for a sediment interceptor according to claim 1, wherein the fixing member is made of a steel material having a substantially U-shape when viewed from the front.

4. 2. The opening width fixing device for a sediment interceptor according to claim 1, wherein the engaging portion is formed in a sawtooth shape and the fixing member is made of a steel material that is approximately U-shaped when viewed from the front.

5. 3. The opening width fixing device for a sediment blocking device according to claim 1 or 2, wherein the engaging member is an L-shaped angle having a hole on one side through which a support pole can be inserted.

6. 5. The opening width fixing device for a sediment blocking device according to claim 3 or 4, wherein the locking member is an L-shaped angle having a hole on one side through which a support pole can be inserted.

7. 7. A retaining wall method comprising fixing the earth and sand blocking device using the opening width fixing device according to claim 1, and fitting sheet piles between the earth and sand blocking device and the wall surface of the excavation trench.

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