Support device for pressure-receiving sheet for shallow trench

Abstract

To provide a support device for a pressure-receiving sheet for a shallow trench which can be easily installed without using heavy machinery or the like and can be installed even if the width of the trench is narrow, and is suitable for shallow trench excavation work.SOLUTION: A structure is composed of a pair of cross beams, a pair of vertical beams, a panel formed of a sheet material stretched between the pair of cross beams, and a strut installed between the pair of panels. The strut is composed of a plate material and legs provided at both ends of the plate material, and a pipe material capable of accommodating the legs is attached to the vertical beam. Furthermore, a reinforcing material is rotatably attached to the vertical beam. The strut is composed of a jack.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an easy-to-install retaining device for an excavation trench, and more particularly to an earth retaining device suitable for shallow trench excavation work. [Background technology]

[0002] Conventionally, in excavation trenches for laying underground pipes for lifelines such as water supply and sewage systems, gas transmission pipes, communication lines, and power lines, supports are assembled to hold back the excavation walls and prevent the side walls from collapsing.

[0003] More specifically, steel sheet piles are arranged along both side walls of the excavation trench, walnuts are installed horizontally along each steel sheet pile so that they face each other, and struts are erected between the walnuts, thereby constructing an excavation trench in which buried pipes can be installed while preventing the steel sheet piles from collapsing due to earth pressure.

[0004] In addition to the above-mentioned earth retaining support using steel sheet piles, a method called a simple earth retaining method is also widely used. This simple earth retaining method includes a method called the slide rail method and a method called the vertical beam plate method.

[0005] The slide rail method involves setting a pair of guide members 3, each of which has multiple struts 2 installed between opposing slide rails 1 as shown in Fig. 16, into an excavated trench, and fitting panels 4 between the slide rails 1 that make up each guide member 3 to retain soil in the excavated wall. As the slide rails 1 are made of heavy materials such as H-shaped steel, the work of setting the guide members 3 into the excavated trench is usually carried out using heavy machinery such as a backhoe.

[0006] As shown in Fig. 17, the vertical beam plate method forms an earth retaining panel 5 consisting of two vertical beams 6 extending parallel to each other in the vertical direction and a plate 7 installed between these two vertical beams 6, and then erects a box 8, with a strut 2 previously attached according to the excavation depth, between the pair of earth retaining panels 5 into the excavation trench. In this construction method, the plate 7 and other components are also heavy, so the work of erecting the box 8 into the excavation trench is usually carried out using heavy machinery such as a backhoe.

[0007] Patent Document 1 discloses a soil and sand blocking device in which a rectangular frame is rotatably connected in a substantially X-shaped configuration and a sheet member is stretched over the rectangular frame to hold back soil. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2019-218680 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0009] The various retaining wall methods mentioned above are essential for the safety of workers in the excavation trench, but when the excavation trench is shallow, about 1.5 metres deep, the danger may be overlooked and retaining walls may not be used.

[0010] Furthermore, even in the case of the above-mentioned simple earth retaining construction method, the installation of the retaining shoring requires the use of heavy machinery such as a backhoe, which tends to result in large-scale work.

[0011] Furthermore, if the excavation depth is shallow and the buried pipe has a small diameter, the width of the excavation trench will naturally be narrow, and the soil There are cases where it is not possible to secure space within the excavation trench to install retaining supports.

[0012] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a retaining device suitable for shallow trench excavation work, which can be easily installed without using heavy machinery, etc., and can be installed even if the width of the excavation trench is narrow. [Means for solving the problem]

[0013] The present invention which achieves the above object is configured as follows.

[0014] (1) The support device for a shallow groove pressure sheet described in claim 1 is composed of a panel formed of a pair of cross beams, a pair of vertical beams, and a sheet material stretched between the pair of cross beams, and a strut installed between the pair of panels.

[0015] (2) The support device for a shallow groove pressure sheet as described in claim 2 is the invention as described in claim 1, in which the struts are formed from plate material and leg materials provided on both ends of the plate material, and pipe material capable of accommodating the leg materials is attached to the vertical beams.

[0016] (3) The support device for a shallow groove pressure sheet described in claim 3 is configured in the invention described in claim 1 by attaching reinforcing members to the vertical beams so as to be rotatable, and by installing a strut between the pair of reinforcing members.

[0017] (4) The support device for a shallow groove pressure sheet described in claim 4 is the invention described in any one of claims 1 to 3, in which the strut is configured by a jack. Effect of the Invention

[0018] How the present invention configured as above works to solve the problems will be generally described with reference to the drawings.

[0019] 1 to 3 show a support device 10 for a pressure-receiving sheet for shallow trenches according to claim 1, and FIG. 4 shows the support device 10 for a pressure-receiving sheet for shallow trenches installed in an excavation trench 101.

[0020] The support device 10 for a shallow groove pressure-receiving sheet has as its main components a panel 11 composed of a cross beam 12, a vertical beam 13 and a sheet material 50, and a strut 14 installed between the pair of panels 11.

[0021] In the support device 10 for the shallow trench pressure sheet, work is carried out in the space formed between a pair of panels 11, and the sheet material 50 blocks fallen soil and sand, ensuring the safety of the workers.

[0022] As described above, the support device 10 for the shallow trench pressure sheet does not use sheet piles or retaining panels, so it is light in weight and can be easily installed by hand without using heavy machinery.

[0023] In addition, according to the present invention, unlike the above-mentioned steel sheet pile shoring, the work of installing steel sheet piles and installing waling materials along each steel sheet pile is not required, which has the advantage of improving work efficiency. Furthermore, since waling is not used, there is no protrusion in the work space, and the work space can be made larger. In other words, it can be installed even if the width of the excavation trench is narrow.

[0024] 5 to 7 show a support device 20 for a shallow groove pressure-receiving sheet according to the second aspect of the present invention.

[0025] The support device 20 for a shallow groove pressure sheet has as its main components a panel 21 composed of a cross beam 22, a vertical beam 23, a pipe material 25 and a sheet material 50, and a strut 24 installed between the pair of panels 21.

[0026] In the support device 20 for the shallow trench pressure sheet, work is carried out in the space formed between a pair of panels 21, and the sheet material 50 blocks fallen soil and sand, ensuring the safety of the workers.

[0027] The support device 20 for shallow trench pressure sheets described in claim 2, like the invention described in claim 1, does not use sheet piles or retaining panels, so it is light in weight and can be easily installed by hand without using heavy machinery.

[0028] In addition, since it does not use a wale, like the invention described in claim 1, work efficiency is improved and installation is possible even if the excavation trench is narrow.

[0029] 8 to 15 show a support device 30 for a shallow-groove pressure-receiving sheet according to the third aspect of the present invention.

[0030] The support device 30 for a shallow groove pressure sheet has as its main components a panel 31 consisting of a cross beam 32, a vertical beam 33 and a sheet material 50, a reinforcing member 34 rotatably attached to the vertical beam 33, and a strut 35 installed between the pair of reinforcing members 34.

[0031] In the support device 30 for the shallow trench pressure sheet, work is carried out in the space formed between a pair of panels 31, and the sheet material 50 blocks fallen soil and sand, ensuring the safety of the workers.

[0032] In the support device 20 for the shallow trench pressure sheet, work is carried out in the space formed between a pair of panels 21, and the sheet material 50 blocks fallen soil and sand, ensuring the safety of the workers.

[0033] The support device 30 for shallow trench pressure sheets described in claim 3, like the invention described in claim 1, does not use sheet piles or retaining panels, so it is light in weight and can be easily installed by hand without using heavy machinery.

[0034] In addition, since it does not use a wale, like the invention described in claim 1, work efficiency is improved and installation is possible even if the excavation trench is narrow.

[0035] Furthermore, in the invention described in claim 3, a reinforcing member 34 is rotatably attached to the vertical beam 33, and a strut 35 is installed between the pair of reinforcing members 34.

[0036] Therefore, as shown in Figures 11 and 12, by rotating a member consisting of a pair of reinforcing members 34 and a strut 35 to a position perpendicular to the vertical beam 33, it is possible to increase the distance between the pair of struts 35. In this state, there is an advantage that it becomes easier to carry a long buried pipe into the excavation trench.

[0037] Furthermore, when the reinforcing member 34 is rotated to a position in which it is arranged parallel to the vertical beam 33 as shown in FIG. 13 and FIG. 14, the reinforcing member 34 can have the effect of reinforcing the vertical beam 33.

[0038] Furthermore, as shown in FIG. 15, when the reinforcing member 34 is rotated to a position adjacent to the cross beam 32, the reinforcing member 34 can have the effect of reinforcing the cross beam 32.

[0039] In the invention described in claim 4, the struts are configured with jacks. This configuration allows the struts to be flexible, which means that the distance between the panels can be changed as desired, making it possible to appropriately retain soil according to the width of the excavation trench. [Brief description of the drawings]

[0040] [Figure 1] A perspective view of the invention according to claim 1. [Diagram 2] 1, explanatory perspective view [Diagram 3] Same, front view [Figure 4] FIG. 1 is an explanatory diagram showing an embodiment of the present invention; [Diagram 5] A perspective view of the invention according to claim 2. [Figure 6] 1, explanatory perspective view [Figure 7] Same, front view [Figure 8] A perspective view of the invention according to claim 3. [Figure 9] 1, explanatory perspective view [Figure 10] Same, front view [Figure 11] FIG. 13 is an explanatory perspective view showing a state in which the reinforcing member is rotated to a position perpendicular to the longitudinal beam. [Figure 12]The same, explanatory front view [Figure 13] FIG. 13 is an explanatory perspective view showing a state in which the reinforcing member is rotated to a position parallel to the longitudinal beam. [Figure 14] The same, explanatory front view [Figure 15] FIG. 13 is an explanatory perspective view showing a state in which the reinforcing member is rotated to a position adjacent to the cross beam 32. [Figure 16] Explanatory diagram of a conventional example [Figure 17] Explanatory diagram of a conventional example DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] Preferred embodiments of the invention will be described below with reference to the drawings. 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. In addition, U in each figure means up and D means down.

[0042] The support device 10 for a pressure-receiving sheet for shallow grooves, which is the invention described in claim 1, mainly comprises a panel 11 composed of a cross beam 12, a vertical beam 13, and a sheet material 50, and a strut 14 installed between the pair of panels 11, as shown in Figures 1 to 3. In Figure 2, one of the sheet materials 50 is drawn by a dashed line in order to visualize the inside.

[0043] The cross beams 12 are made of steel bars. Of course, this is just one example, and as long as there is no problem with strength, they may be made of lightweight metals such as aluminum or stainless steel to reduce weight.

[0044] The vertical beams 13 are formed from steel bars. Of course, this is just one example, and as long as there is no problem with strength, they may be formed from lightweight metals such as aluminum or stainless steel to reduce weight. Also, as shown in Figure 2, the vertical beams 13 are formed to be curved, but of course this is just one example, and they may be formed to be straight.

[0045] The strut 14 may be a rod-shaped or plate-shaped member, and both ends of the strut 14 are fixed to the vertical beam 13. The material may be steel or a lightweight metal such as aluminum or stainless steel.

[0046] The sheet member 50 uses a mesh sheet. Specifically, mesh sheets used in construction work, i.e., woven fabrics made of polyester fibers with a weft weave, or fabrics with polyvinyl chloride resin or the like applied to the surface, can be used. Of course, the material of the sheet member is not limited as described above, and other sheet-like materials can be used as long as they have the required strength. The upper and lower ends of the sheet material 50 are respectively wrapped around the cross beam 12 and the edges are sewn and attached to the cross beam 12. Of course, the method of attaching the sheet material 50 is not limited as described above, and any method can be used, such as sandwiching it between plates or fixing it with rivets, as long as there is no problem with the retaining strength.

[0047] The support device 20 for a shallow groove pressure-receiving sheet, which is the invention described in claim 2, mainly comprises a panel 21 composed of a cross beam 22, a vertical beam 23, a pipe material 25 and a sheet material 50, and a strut 24 installed between the pair of panels 21, as shown in Figures 5 to 7. Note that Figure 6 is drawn without the sheet material 50 in order to visualize the inside.

[0048] The cross beam 22 is made of a steel bar material. Of course, this is just one example, and as long as there is no problem with strength, it may be made of a lightweight metal such as aluminum or stainless steel in order to reduce weight.

[0049] The vertical beams 23 are made of steel bars. Of course, this is just one example, and as long as there is no problem with strength, they may be made of lightweight metals such as aluminum or stainless steel to reduce weight. The pipe material 25 is a hollow pipe body, and may be made of steel or lightweight metal such as aluminum or stainless steel, etc. The internal cavity of the pipe material 25 has a shape that allows the leg material 24b, which will be described later, to be loosely inserted therein.

[0050] As shown in Fig. 6, the strut 24 is formed by a plate material 24a and a pair of legs 24b provided at both ends of the plate material 24a. As shown in the figure, the plate material 24a is formed in a hollow U-shape, and the legs 24b are inserted into this hollow part and then fixed with fastening members such as bolts and nuts. In addition, by providing a plurality of holes 24c in the longitudinal direction of the plate material 24a, it is possible to change the fixing positions of the plate material 24a and the legs 24b. This makes it possible to change the distance between the pair of panels 21. Of course, this is just one example, and the plate material and the legs may be integrally formed.

[0051] The leg member 24b has a hole 24d, which is aligned with a hole 25a in the pipe member 25 and into which a fastening member such as a bolt is inserted to fix the leg member 24b and the pipe member 25 together.

[0052] The sheet member 50 used in the invention described in claim 2 can be the same material as the sheet member 50 used in the invention described in claim 1. The method of attaching the sheet member 50 to the cross beam 22 can be a method of wrapping the upper and lower ends of the sheet member 50 around the cross beam 22 and sewing the edges. Of course, the method of attaching the sheet member 50 is not limited to this, and any method can be used, such as sandwiching it between plates or fixing it with rivets, as long as there is no problem with the retaining strength.

[0053] As shown in Figures 8 to 15, the support device 30 for a pressure-receiving sheet for shallow grooves, which is the invention described in claim 3, mainly comprises a panel 31 consisting of a cross beam 32, a vertical beam 33 and a sheet material 50, a reinforcing member 34 rotatably attached to the vertical beam 33, and a strut 35 installed between the pair of reinforcing members 34. Note that Figures 9, 11, 13 and 15 are drawn without the sheet material 50 in order to visualize the inside.

[0054] The cross beam 32 is formed from a steel bar material. Of course, this is just one example, and as long as there is no problem with strength, it may be formed from a lightweight metal such as aluminum or stainless steel in order to reduce weight.

[0055] The vertical beams 33 are made of steel plate material. Of course, this is just one example, and as long as there is no problem with strength, they may be made of lightweight metals such as aluminum or stainless steel to reduce weight.

[0056] A reinforcing member 34 is attached to the vertical beam 33 so as to be rotatable about an axis 36. A steel plate or pipe material can be used as the reinforcing member 34. Of course, this is just one example, and as long as there is no problem with strength, the reinforcing member may be made of a lightweight metal such as aluminum or stainless steel in order to reduce weight.

[0057] The sheet member 50 used in the invention described in claim 3 can be the same material as the sheet member 50 used in the invention described in claim 1. The method of attaching the sheet member 50 to the cross beam 32 can be a method of wrapping the upper and lower ends of the sheet member 50 around the cross beam 32 and sewing the edges. Of course, the method of attaching the sheet member 50 is not limited to this, and any method can be used, such as sandwiching it between plates or fixing it with rivets, as long as there is no problem with the retaining strength.

[0058] In the invention described in claim 4, the struts 14, 24, 35 are constituted by jacks. As the jacks, mechanical jacks such as screw jacks, hydraulic jacks, air jacks, etc. can be used.

[0059] The strut 14 shown in FIG. 1 and the strut 35 shown in FIG. 8 are made of a large diameter pipe and a small diameter pipe that can slide inside the large diameter pipe, and are configured as a jack in which the position of multiple holes (not shown) in the small diameter pipe is aligned with the position of holes in the large diameter pipe, and the two pipes are fixed together by inserting a pin, allowing the length to be adjusted.

[0060] Furthermore, the strut 24 shown in Figure 6 etc. is configured to be expandable and contractible by providing multiple holes 24c in the longitudinal direction of the plate material 24a as described above, but the form of the jack is naturally not limited to this, and it is also acceptable to use, for example, a hydraulic jack or an air jack with legs attached to both ends. [Explanation of symbols]

[0061] 10. Support device for pressure-receiving sheet for shallow grooves 10. Support device for pressure-receiving sheet for shallow grooves 11 Panel 12...Horizontal beam 13. Longitudinal beam 14··Strider 20. Support device for pressure-receiving sheet for shallow grooves 21 Panel 22...Horizontal beam 23. Longitudinal beam 24··Strider 24a...Plate material 24b · Leg material 25 Pipe material 30··Support device for pressure-receiving sheet for shallow grooves 31 Panel 32...Horizontal beam 33 Longitudinal beam 34 Reinforcement 35··Strider beam 36··axis 50 Sheet material

Claims

1. A panel formed of a pair of horizontal beams, a pair of vertical beams, and a sheet material stretched between the pair of horizontal beams; A strut installed between the pair of panels; A support device for a shallow groove pressure sheet comprising:

2. The strut is composed of a plate material and legs provided at both ends of the plate material. A pipe material capable of accommodating the leg material is attached to the vertical beam; 2. A support device for a shallow groove pressure-receiving sheet according to claim 1.

3. The reinforcement member is rotatably attached to the longitudinal beam; A strut was installed between a pair of reinforcement members.

2. A support device for a shallow groove pressure-receiving sheet according to claim 1.

4. 4. A support device for a shallow groove pressure sheet according to claim 1, wherein the strut is a jack.

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