Wall surface curing system using support type continuous sheet

Abstract

To provide a wall surface curing system using a support type continuous sheet, which can be easily installed without using heavy machinery or the like and can be installed even if the width of the excavation trench is narrow, and is suitable for shallow trench excavation work, and a work method using the wall surface curing system using the support type continuous sheet.SOLUTION: A wall surface curing system using a support type continuous sheet is constructed using a sheet material with a pile insertion section and piles. This wall surface curing system using a support-type continuous sheet is installed on the excavated wall surface in a work space during work in an excavation trench, and a work method is adopted in which an installation position of the wall surface curing system using the support type continuous sheet is moved sequentially as the work position moved.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a device for preventing industrial accidents in construction work involving small-scale trench excavation, such as for water supply, sewerage, telecommunications facilities, and gas supply facilities (hereinafter referred to as "water supply and sewerage construction work, etc."), and more specifically to a wall surface curing system using a support-type continuous sheet that can prevent fatal and injury accidents among workers due to landslides during trench excavation work and work inside the trench, and a work method using said simple retaining wall. [Background technology]

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

[0003] Guidelines established by the Ministry of Health, Labour and Welfare regarding such earth retaining supports stipulate that when carrying out small-scale trench excavation work, specifically work involving digging a trench approximately 1.5 meters to 4 meters deep and approximately 3 meters wide, which is excavated almost vertically, appropriate earth retaining supports etc. should be installed using the earth retaining pre-construction method.

[0004] In addition, the Industrial Safety and Health Regulations require that when there is a risk of harm to workers due to collapse or other reasons, measures to prevent danger, such as setting up retaining shoring, be taken regardless of depth.

[0005] However, it is not easy to objectively determine "when there is a risk of harm to workers" in the above-mentioned Industrial Safety and Health Regulations, and since the target depth in the aforementioned guidelines is 1.5 meters or more, when placing orders from public institutions, retaining soil costs are often not included in the calculation of excavation depths of less than 1.5 meters.

[0006] As a result of these circumstances, there have been many reported cases in which workers have been killed or injured in landslides caused by trench digging or working inside the trench, where the excavated trench was less than 1.5 meters deep.

[0007] In order to deal with such a worrying situation, a sediment blocking device that can be easily installed in a small-scale excavation trench has been proposed, as described in Patent Document 1. This sediment blocking device is made by connecting two square frames in an X-shape so that they can rotate freely, and stretching a sheet that can block collapsed sediment on the wall surface of the excavation trench over the square frames. [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 method known as the simple earth retaining construction method, the installation of the earth retaining support work 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 pipes are small in diameter, the width of the excavation trench will naturally be narrow, and there may be cases where space cannot be secured within the excavation trench to install earth retaining supports.

[0012] In addition, the pipes laid in the excavation trench may have bends, and the trench excavation is not necessarily a straight line. However, it may be difficult to install conventional earth retaining supports at bends.

[0013] Therefore, the present invention aims to provide a wall surface curing system using a support-type continuous sheet that can be easily installed without using heavy machinery, etc., and is suitable for shallow trench excavation work, even if the trench is narrow, and a work method using the wall surface curing system using the support-type continuous sheet. Note that the present invention does not aim to prevent the excavation trench from collapsing, but rather to reduce the force of the collapsed soil when it does collapse, and to prevent workers from being buried in the soil as much as possible. [Means for solving the problem]

[0014] The present invention which achieves the above object is configured as follows.

[0015] (1) The wall curing system using the pillar-type continuous sheet described in claim 1 is composed of a sheet material having a pile insertion portion and a pile.

[0016] (2) The wall curing system using the pillar-type continuous sheet described in claim 2 is constituted by a bag-shaped body in which the pile insertion section in the invention described in claim 1 is provided in the sheet material.

[0017] (3) The wall curing system using a pillar-type continuous sheet as described in claim 3 is constructed by installing the wall curing system using a pillar-type continuous sheet as described in claim 1 or claim 2 opposite each other and erecting a strut across a pair of opposing piles.

[0018] (4) The method of working in an excavation trench described in claim 4 is to lay the wall curing system using the pillar-type continuous sheet described in claim 1 on the excavated wall surface of the work space during work in the excavation trench, and sequentially move the laying position of the wall curing system using the pillar-type continuous sheet by rotating the sheet material around the stake located at the end of the sheet material.

[0019] (5) The method of working in an excavation trench described in claim 5 is to lay the wall curing system using the pillar-type continuous sheet described in claim 2 on the excavated wall surface of the work space during work in the excavation trench, and sequentially move the laying position of the wall curing system using the pillar-type continuous sheet by rotating the sheet material around the stake located at the end of the sheet material.

[0020] (6) The method of working in an excavated trench described in claim 6 is such that, when moving the work position of the wall curing system using the pillar-type continuous sheet described in claim 3 that has been installed, the strut is temporarily removed, the sheet material is rotated around the pile located at the end of the sheet material, and the strut is re-erected, thereby sequentially moving the installation position of the wall curing system using the pillar-type continuous sheet. Effect of the Invention

[0021] How the present invention configured as above works to solve the problems will be generally described with reference to the drawings.

[0022] 4 shows the state in which the wall surface curing system 20 using a pillar-type continuous sheet as described in claim 2 is laid in an excavation trench 100. As shown in the figure, a pile 40 is driven into the bottom surface of the excavation trench 100, thereby laying a sheet material 41 on the excavated wall surface of the excavation trench 100. Although not shown, the wall surface curing system 10 using a pillar-type continuous sheet as described in claim 1 also lays a sheet material 41 on the excavated wall surface by driving a pile 40 into the bottom surface of the excavation trench 100.

[0023] As described above, according to the present invention, the sheet material 41 can be laid by driving the piles 40 into the ground, and installation can be performed without using heavy materials such as sheet piles as in the conventional example. In other words, installation can be performed easily without using heavy machinery. Furthermore, unlike the conventional example in which individual materials such as sheet piles are laid side by side, the sheet material can be laid continuously, which increases the ease of installation.

[0024] In addition, since no wales are used, there is little protrusion into the excavated trench when the sheet material is laid. In other words, the sheet material can be installed even if the width of the excavated trench is narrow.

[0025] In addition, since the sheet material 41 is highly flexible, it can be easily stretched even if the excavation trench is curved or has other complex shapes, and it is possible to lay a wall curing system using a support-type continuous sheet in excavation trenches of various shapes. In other words, it is possible to lay it variably regardless of the shape of the excavation trench. Therefore, it can be applied as a simple protective measure against collapses, not in straight sections, such as corners where the excavation trench bends at 90 degrees or junctions where the excavation trenches join in a T-shape.

[0026] The wall surface curing system using the support-type continuous sheet according to the present invention can be easily installed, removed, and transported because the piles 40 and the sheet material 41 are composed of separate members. For example, as shown in Fig. 5, after work is completed at work position A in the excavation trench 100, the wall surface curing system using the support-type continuous sheet can be easily removed, and then the wall surface curing system using the support-type continuous sheet can be easily installed at work position B and work can be performed.

[0027] Furthermore, by using a long sheet material 41 and increasing the number of piles 40, it becomes possible to retain soil on the wall surface of the excavation trench over a comparatively long distance as shown in FIG.

[0028] The wall curing system using the pillar-type continuous sheet according to the present invention is intended for use in shallow excavation situations where the excavation trench is less than 1.5 meters deep. In other words, even a simple retaining means such as fixing the sheet material 41 with piles 40 can receive collapsing soil when the trench wall collapses, or suppress the rate of collapse, thereby preventing workers from being buried alive as much as possible.

[0029] Moreover, in the wall surface curing system 30 using a support-type continuous sheet as described in claim 3, as shown in Fig. 6, the wall surface curing system using a support-type continuous sheet as described in claim 1 or claim 2 is installed facing each other, and a strut 50 is erected across a pair of facing piles 40. Therefore, the strut 50 makes it possible to suppress earth pressure so that the wall surface does not collapse, and it becomes possible to more effectively prevent the collapse of the trench wall surface.

[0030] The method for working in an excavated trench described in claims 4, 5 and 6 involves rotating the sheet material 41 around a stake 40 at the end of the sheet material 41 as shown in Fig. 7, and moving the installation position of the wall surface curing system using the pillar-type continuous sheet in sequence as the work progresses. This will be described in detail below.

[0031] When moving the wall surface curing system using the support-type continuous sheet from the position in FIG. 7A to the position in FIG. 7B, first, the pile 40b is removed, and then the sheet material 41 is rotated in the direction of the arrow around the pile 40a at the end of the sheet material 41. When the sheet material 41 is rotated to a position parallel to the excavation trench wall surface H, the pile 40b is inserted into the pile insertion portion 11, 21 and driven into the bottom surface of the excavation trench, thereby moving the wall surface curing system using the support-type continuous sheet. Furthermore, when moving from the position in FIG. 7B to the position in FIG. 7C, first, the pile 40a is removed, and then the sheet material 41 is rotated in the direction of the arrow around the pile 40b at the end of the sheet material 41. When the sheet material 41 is rotated to a position parallel to the excavation trench wall surface H, the pile 40a is inserted into the pile insertion portion 11, 21 and driven into the bottom surface of the excavation trench, thereby further moving the wall surface curing system using the support-type continuous sheet.

[0032] With this configuration, in the invention described in claims 4, 5, and 6, the labor required for pulling out and driving in the piles can be halved, thereby improving work efficiency. [Brief description of the drawings]

[0033] [Figure 1] A perspective view of the invention according to claim 2. [Diagram 2] Plan view [Diagram 3] A perspective view of the invention according to claim 1. [Figure 4] FIG. 1 is an explanatory diagram showing an embodiment of the present invention; [Diagram 5] FIG. 1 is an explanatory diagram showing an embodiment of the present invention; [Figure 6] An explanatory diagram showing the embodiment of the invention described in claim 3. [Figure 7] FIG. 1 is an explanatory diagram showing an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] 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.

[0035] The wall surface curing system using a pillar-type continuous sheet according to the present invention has sheet material 41 and piles 40 as main components.

[0036] A mesh sheet is used as the sheet material 41. Specifically, a mesh sheet used in construction work, i.e., a woven fabric made of polyester fibers with a weft weave or a fabric with a polyvinyl chloride resin or the like applied to the surface, can be used. Of course, the material of the sheet member is not limited to this, and other sheet-like materials can be used as long as they have the required strength.

[0037] The pile 40 is made of a steel rod with a sharpened tip. 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.

[0038] The pile insertion section 11 in the wall curing system 10 using a pillar-type continuous sheet as described in claim 1 is a metal member made of a curved section 11a and flat sections 11b at both ends thereof, as shown in Fig. 3, which are arranged in parallel in the vertical direction in a shape in which the flat sections 11b are fixed to the sheet material 41. A pile 40 is inserted into this curved section 11a. Of course, this is only one example, and any shape can be adopted as long as the pile 40 can be inserted and the sheet material 41 can be supported by the pile 40.

[0039] The insertion section 21 in the wall surface curing system 20 using a pillar-type continuous sheet as described in claim 2 is configured by attaching a long and narrow cloth material in the up and down directions of a sheet material 41 as shown in Figures 1 and 2. Specifically, both ends 21b of the cloth material are fixed to the sheet material 41 by a method such as sewing, and the unfixed portion is formed into a bag-like body 21a. Of course, this is only one example, and any bag-like shape can be adopted as long as the pile 40 can be inserted and the sheet material 41 can be supported by the pile 40.

[0040] The wall surface curing system 51 using a support-type continuous sheet as set forth in claim 3 is configured by installing the wall surface curing system 10 using a support-type continuous sheet as set forth in claim 1 or the wall surface curing system 20 using a support-type continuous sheet as set forth in claim 2 opposite each other, and erecting 40 struts 50 on a pair of opposing piles. Note that Fig. 6 shows the case where the wall surface curing system 20 using a support-type continuous sheet as set forth in claim 2 is installed opposite each other.

[0041] The strut 50 has a cylindrical body 51 on both ends, and the upper end of the pile 40 is loosely inserted into the cylindrical body 51 to install the strut 50 between the piles 40. The method of installing the strut 40 is not limited to the above, and any method can be used as long as it can be installed between opposing piles 40 and can withstand a certain amount of earth pressure.

[0042] The method of working in an excavation trench described in claims 4 and 5 involves removing the wall surface curing system using a support-type continuous sheet after work is completed at work position A in the excavation trench 100, as shown in Figure 5, and then laying the wall surface curing system using a support-type continuous sheet at work position B and performing work.

[0043] The method of working in an excavated trench described in claim 6 also involves moving and installing the wall surface curing system 30 using a support-type continuous sheet in sequence according to the progress of work, similar to the above-mentioned claims 4 and 5. In the invention described in claim 6, in addition to the work in the inventions described in claims 4 and 5, the strut 50 is first removed when moving, and then re-erected after the movement is completed. [Explanation of symbols]

[0044] 10. Wall curing system using continuous support sheets 11 Pile insertion section 20. Wall curing system using continuous support sheets 21a ··Bag state 30. Wall curing system using pillar-type continuous sheet 40...Pile 40a··Pile 40b·Pile 41 Sheet material 50··Strong beam

Claims

1. A wall curing system (10) using a support-type continuous sheet consisting of a sheet material with a pile insertion portion and a pile.

2. 2. A wall curing system (20) using a support-type continuous sheet as described in claim 1, wherein the pile insertion portion is a bag-shaped body provided in the sheet material.

3. A wall curing system (30) using a pillar-type continuous sheet, which is constructed by installing the disaster prevention device according to claim 1 or claim 2 opposite each other and erecting a strut across a pair of opposing piles.

4. A method for working in an excavation trench in which a wall surface curing system (10) using a support-type continuous sheet is installed on the excavated wall surface of a work space during work in the excavation trench, and as the work position moves, the sheet material is rotated around a stake located at the end of the sheet material, thereby sequentially moving the installation position of the wall surface curing system (10) using a support-type continuous sheet.

5. A method for working in an excavation trench in which a wall surface curing system (20) using a support-type continuous sheet is installed on the excavated wall surface of a work space during work in the excavation trench, and as the work position moves, the sheet material is rotated around a stake located at the end of the sheet material, thereby sequentially moving the installation position of the wall surface curing system (20) using the support-type continuous sheet.

6. A method for working in an excavation trench in which a wall surface curing system (30) using a pillar-type continuous sheet is installed in the work space during work in the excavation trench, and as the work position moves, the strut is temporarily removed, the sheet material is rotated around the pile located at the end of the sheet material, and the strut is erected again, thereby sequentially moving the installation position of the wall surface curing system (30) using the pillar-type continuous sheet.

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