JP3704686B2 - Support device for retaining liner plate and retaining method using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a liner plate support device used when constructing a foundation such as a steel tower or a high-rise building, and a soil retaining method using the same.
[0002]
[Prior art]
  As a conventional earth retaining method when constructing a vertical shaft, there is a method using a liner plate. In this conventional earth retaining method, a hole having a depth of about 0.5 m corresponding to a construction mine diameter is excavated, and a plurality of liner plates are connected to form a cylindrical liner plate assembly. Then, backfill the soil between the liner plate assembly and the surrounding ground, or fill the backfilling material with mortar grout. It was dug down about 0.5 m so that it could be rooted, a liner plate was assembled to form a cylindrical liner plate, and this liner plate assembly was connected to the upper liner plate assembly. And it excavated to the predetermined depth, repeating the same process hereafter. (For example, refer to Patent Document 1).
[0003]
  On the other hand, as shown in FIG. 10, in the above conventional earth retaining method, fixing concrete is placed on the outer peripheral side of the liner plate on the hole side in order to support the liner plate connected to the lower stage in a suspended form. Was. In order to ensure workability and safety, the fixing concrete needs to have a supporting strength that can sufficiently withstand the weight of the connected liner plate. Therefore, for example, when the hole to be excavated is a circle having a diameter of about 2 to 6 m and a depth of about 10 m, the fixing concrete has a vertical thickness of 30 cm or more and a lateral overhang width of 50 cm, for example. It was necessary to provide a donut shape on the outer surface side of the liner plate on the hole opening side with the above size.
[Patent Document 1]
Japanese Patent Laid-Open No. 5-295579 (paragraph numbers [0013] to [0014], FIGS. 5 to 7)
[0004]
[Problems to be solved by the invention]
  In the conventional earth retaining method, when the liner plate was removed and the hole was refilled after the required work, the fixing concrete was buried and killed. It was regarded as industrial waste, and it was necessary to remove this fixing concrete. However, since the volume and weight of the fixing concrete are very large, a large amount of concrete waste that is difficult to decompose naturally is discharged. Therefore, it is necessary to entrust a specialized contractor to dispose of the removed concrete. The cost was very high. Furthermore, along with an increase in discarded concrete, various problems such as a shortage of disposal sites, deterioration of the environment around the disposal sites, and illegal dumping have occurred. Moreover, when removing the fixing concrete, much work is required for the work of crushing, digging and transporting the concrete. On the other hand, the work of placing the fixing concrete is a heavy labor, and it is necessary to have a curing period until the placed concrete is hardened, which requires a long period of construction.
[0005]
  The present invention has been made in view of the above-described conventional problems, and one object thereof is for earth retaining which does not discharge industrial waste such as waste concrete at all and can improve workability such as installation and removal. It is an object of the present invention to provide a liner plate support device and a soil retaining method using the same. Another object of the present invention is to provide an earthing liner plate support device capable of ensuring workability and safety by reliably supporting the liner plate with sufficient strength and an earthing method using the same. is there.
[0006]
[Means for Solving the Problems]
  In order to solve the above problems, the present inventionA plurality of retaining liner plates 10 are used when drilling a hole while sequentially connecting the upper and lower layers, and the uppermost liner plate 10a mounted in the shallow excavation hole H at the start of excavation is used. The bottom liner plate connected to and supported by the uppermost liner plate 10a is also supported in a suspended manner, and these liner plates are detachably connected and fixed liner plate support devices, A support plate 22 connected to the liner plate 10a and extending on the ground so as to intersect the vertical direction; and reinforcing means for reinforcing the connection between the support plate 22 and the uppermost liner plate 10a. The uppermost liner plate 10a is disposed vertically along the surface, the upper part is connected together with the support plate and the uppermost liner plate 10a, and the lower part is the uppermost liner plate. Composed from lower and lower liner plate (10b) reinforcing rib member 28 support device 12 of the earth retaining liner plate having coupled together. Since the support device 12 is detachable, it can be removed from the liner plate 10 and reused after the required work. The support plate 22 is formed in any other shape such as a triangle, a rectangle, a pentagon, other polygons, a semicircle, an arc, or a donut shape surrounding a hole.
[0007]
  Also,The reinforcing means extends and supports the uppermost liner plate 10a in a vertical direction. A ground side liner plate 40 arranged in an L-shape on the plate 22 and a fixing member connected to both the ground side liner plate 40 and the support plate 22 to integrally fix the ground side liner plate 40 and the support plate 22. 42, and a ground side three-dimensional reinforcing structure includingIt's also good.
[0008]
  Also,A driving and fixing means 46 for fixing the end side of the support plate 22 arranged so as to extend on the ground to the ground is provided.It is good as well. The driving and fixing means 46 is preferably composed of one or a plurality of pile bodies.
[0009]
  Also,The support device 12 includes a plurality of support units 20 arranged intermittently around the liner plate 10.It is good as well.
[0010]
  further,5. A method for retaining earth using the retaining plate support apparatus 12 according to any one of claims 1 to 4, wherein a plurality of retaining liner plates 10 are sequentially arranged on an upper layer side and on a lower layer side. When drilling holes while connecting, the uppermost liner plate 10a is attached to the shallow excavation hole H at the start of excavation, and the liner plate support device 12 is detachably attached to and supported by the upper part of the uppermost liner plate 10a. The lower liner plate connected to the uppermost liner plate 10a is also suspended by the liner plate support device, and the support device 12 is separated and recovered from the uppermost liner plate 10a after excavation is completed. Using a plate support deviceConsists of earth retaining methods.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a support device for a retaining liner plate according to the present invention will be described with reference to the accompanying drawings. The retaining plate support device of the present invention (hereinafter referred to as “liner plate support device”) is, for example, excavation of a hole in the ground in construction of a shaft or foundation of a construction such as a power transmission tower or high-rise building. It is a suspension support device on the ground side of a liner plate used as a temporary material for earth retaining at the time, and is connected to the liner plate to be supported in a detachable manner, and when refilling a hole after completion of a required operation, the device is used. The main feature is that it can be collected and reused.
[0012]
  1 to 9 show an embodiment of a liner plate support device of the present invention. In this embodiment, as shown in FIG. 1, the liner plate support device 12 can be attached to and detached from the uppermost liner plate of the earth retaining liner plate that is connected from the upper layer side to the lower layer side when drilling holes. Fixed to support the liner plate in a suspended manner. Strictly speaking, as the excavation progresses, the liner plate connected to the lower layer side has a supporting force in the settling direction due to earth pressure, so the entire load of all the liner plates connected to the lower layer side is not suspended. It is supported by a support.
[0013]
  FIG. 1 shows a state in which liner plates 10 are vertically mounted in a plurality of stages in the excavation hole H and one ground side liner plate 40 is further installed on the ground side. As shown in FIGS. 1 and 9, the liner plate 10 is attached to a hole excavated in the ground, and is excavated by sequentially connecting the upper layer side to the lower layer side in a plurality of layers as the hole excavation progresses. In this embodiment, a single liner plate 10 is configured by connecting a plurality of plate pieces 11 to the left and right and assembling them into a short cylindrical shape. The liner plates are 10a, 10b, 10c. . . As described above, the entire liner plate frame is formed so as to be layered in the vertical direction and continuously provided in the vicinity of the excavation hole H.
[0014]
  As shown in FIGS. 7 and 8, the plate piece 11 includes a horizontally elongated substantially rectangular substrate 14 formed by corrugating a thin steel plate so that irregularities are alternately repeated in the vertical direction, and four sides of the substrate 14. And a flange 18 in which a plurality of bolt holes 16 are perforated. The plate piece 11 is provided to be curved in an arc shape along the longitudinal direction, and has a large strip plate shape with a diameter set by connecting a plurality of plate pieces 11 in the circumferential direction. One liner plate is formed. Then, another liner plate is connected to the lower layer side of the cylindrical liner plate by bolts and nuts so that they are connected in a straight line in the vertical direction, and a large cylindrical liner plate overall frame as shown in FIG. 9 is constructed. Is done. When the liner plates 10 are connected in the longitudinal direction, the flanges in the longitudinal direction are connected in a staggered manner for each liner plate layer in order to maintain the strength of the liner plate against earth pressure. The liner plate support device 12 is disposed on the uppermost layer side of these earth retaining liner plates, that is, on the opening side of the excavation hole.
[0015]
  The liner plate support device 12 is a liner plate that is detachably fixed to the uppermost liner plate and supports the liner plate connected to the lower layer side in a suspended manner using the ground around the opening side of the hole H. It is a support means. In this embodiment, as shown in FIGS. 1 and 2, the liner plate support device 12 is composed of five drooping support units 20 arranged at regular intervals on the circumference of the uppermost liner plate 10a. These units are detachably fixed to the uppermost liner plate 10a. The liner plate support device is not limited to the configuration in which the liner plate is dispersedly arranged around the uppermost liner plate as in this embodiment, but may be formed in a donut shape continuous around the liner plate, for example. In the present embodiment, one support unit 20 will be described below as a liner plate support device.
[0016]
  In the embodiment of FIG. 3, the liner plate support device (each support unit) 12 includes a support plate 22 and reinforcing means for reinforcing the support plate 22. The support plate 22 is detachably connected to the uppermost liner plate 10a, and protrudes outward from the liner plate.UpThe liner plate connected to the lower layer side is supported in a suspended manner by being extended and locked to the ground around the excavation hole. In this embodiment, the support plate 22 is placed on the ground of the edge of the excavation hole H, and one end side is disposed on the upper surface of the upper flange 18 of the uppermost liner plate 10a, and the other end side is the excavation hole H. It is mounted on the edge ground so as to go outward from the hole H. As shown in FIGS. 4 and 5, the support plate 22 is made of, for example, a metal flat plate such as an iron plate formed in a horizontally long rectangular shape in plan view, and four connection holes 24 are drilled. Of these four connecting holes 24, the inner two are formed as circular holes, while the outer two are formed as long holes, whereby the support plate 22 has various curvatures. It can be connected to other liner plates. The number of connecting holes may be arbitrary, and all the connecting holes may be long holes. The support plate 22 is a bolt in a state where a part of the upper side flange of the uppermost liner plate 10a is brought into close contact with the lower surface thereof, and the connecting hole 24 and the bolt hole of the flange of the liner plate 10a are aligned.・ The nut is connected and fixed detachably.
[0017]
  3 and 4, the reinforcing means is reinforcing means for improving the support strength of the entire liner plate frame of the liner plate support device 12 by reinforcing the connection state of the support plate 22 and the uppermost liner plate 10a. . In this embodiment, the reinforcing means includes a reinforcing rib member 28 and a ground side three-dimensional reinforcing structure 30.
[0018]
  The reinforcing rib member 28 is connected to the support plate 22 together with the uppermost liner plate 10a, so that the load applied to the connecting portion between the support plate 22 and the uppermost liner plate 10a is dispersed, and the liner plate of the liner plate support device 12 is distributed. Improves the strength to support the entire frame. The reinforcing rib member 28 is perpendicular to the support plate 22 at a position directly below one connection hole 24 of the support plate 22.ArrangementIn addition, the uppermost liner plate 10a is arranged in a vertically extending manner along the longitudinal direction along the inner surface of the uppermost liner plate 10a, and is integrally connected with its upper end coupled with the support plate 22 and the ground side liner plate 10a. ing. The reinforcing rib member 28 is formed of, for example, a metal plate such as an iron plate, and is provided with a length substantially the same as the vertical width of the liner plate. The reinforcing rib member 28 is fitted in accordance with a wavy uneven surface on the inner side of the liner plate. And a straight plate portion 34 fixed to the wave plate portion 32. The reinforcing rib member 28 is integrally fixed at a position directly below the support plate 22 and is provided with a corrugated plate portion 32 that is in close contact with the inner surface of the uppermost liner plate 10a, whereby a bending moment inward of the uppermost liner plate is provided. The resistance force in the form of pushing back against is increased, and the support strength of the connecting portion with the support plate 22 is improved. The upper and lower end portions of the corrugated plate portion 32 are bent at right angles toward the inside to form upper and lower end surfaces. Bolt-penetrating connection holes are formed in the upper and lower end surfaces, respectively. The straight plate portion 34 is disposed so as to face the corrugated plate portion 32 and is fixed to the upper and lower end surfaces of the corrugated plate portion 32 by welding or the like to reinforce the corrugated plate portion 32. The reinforcing rib member 28 is a bolt in a state where the corrugated plate portion 32 is in contact with the inner surface of the uppermost liner plate 10a and the upper side flange of the uppermost liner plate 10a is sandwiched between the upper end surface and the support plate 22.・ Nut connected. On the other hand, the lower end side of the reinforcing rib member 28 is fixed by a bolt that connects the uppermost liner plate 10a and the lower liner plate 10b that is connected directly below the uppermost liner plate 10a. In this embodiment, one reinforcing member is connected to each support plate 22, but a plurality of reinforcing rib members may be connected to each support plate 22.
[0019]
  The ground-side three-dimensional reinforcing structure 30 is three-dimensionally provided on the ground side of the support plate 22 so that the load applied to the connection portion between the support plate 22 and the uppermost liner plate 10a is distributed to each member constituting the structure. The strength of supporting the entire liner plate frame of the support plate 22 is improved. The ground side three-dimensional reinforcing structure 30 is a fixed body that integrally fixes the ground side liner plate 40 connected to the upper side from the uppermost liner plate 10a of the entire liner plate frame, and the ground side liner plate 40 and the support plate 22. Member 42. As shown in FIGS. 3 and 6, the ground side liner plate 40 is provided with the same configuration as the liner plate 10 used for earth retaining, and the plate pieces 11 as described above are connected in a cylindrical shape on the ground side. The lower side flange and the upper side flange of the uppermost liner plate 10a are connected in a straight line so as to extend the entire frame of the liner plate to the ground while sandwiching the support plate 22. The ground side liner plate 40 is arranged in a right-angle L shape with respect to the support plate 22, and the uppermost liner plate 10 a and the support plate 22 are connected at the place where the support plate 22 is arranged. The bolts 26 are connected to the uppermost liner plate 10 a together with the support plate 22. Moreover, the ground side liner plate 40 prevents a person, a tool, or the like from falling into the excavation hole, and ensures the safety of workers on the ground and in the hole.
[0020]
  As shown in FIGS. 3 and 4, for example, the fixing member 42 is formed in a right triangle shape, and is interposed between the support plate 22 and the ground side liner plate to integrally fix both of them. Yes. The fixing member 42 is formed of a substantially right-angled triangular frame body, and is arranged orthogonally between the support plate 22 and the ground side liner plate 40 so that the right-angle L-shaped sides are in contact with each other. It is connected. As shown in FIG. 6, the fixing member 42 is arranged at the same position as the arrangement position of the reinforcing rib member 28 with respect to the left and right of the support plate 22, and is straight with the reinforcing rib member 28 when viewed from the hole side. It is erected at the position where it becomes. The fixing member 42 is formed of, for example, three angle members assembled in a right triangle, and is arranged in contact with the lateral side plate fixed to the support plate 22 and the ground side liner plate. And a hypotenuse arranged in a bridge between the support plate 22 and the ground side liner plate. The vertical side of the fixing member 42 is provided with the same length as the length of the liner plate in the vertical direction, and a connecting piece 44 that protrudes horizontally toward the liner plate is provided on the upper end side of the vertical side. The fixing member 42 is erected between the support plate 22 and the ground side liner plate 40, and connects the lateral side and the support plate 22 with bolts and nuts to connect the vertical side connecting piece 44 and the ground side liner plate. The upper side flange of the bolt 40 is connected to the support plate 22 and the ground side liner plate 40 by bolts and nuts. Thereby, the fixing member 42, the support plate 22, and the ground side liner plate 40 are assembled and fixed in a triangular shape in a side view, and a three-dimensional structure having high strength against a load is formed. The fixing means between the fixing member 42 and the support plate 22 is not limited to bolt / nut connection, and may be fixed by, for example, welding. Further, the arrangement position of the fixing member 42 is not limited to a position that is linear with the reinforcing rib member 28, but may be arranged on the support plate 22 at a position that is alternate with the reinforcing rib member 28. In this embodiment, one fixing member 42 is connected to each support plate 22. However, the present invention is not limited thereto, and two, three, or more fixing members 42 are connected to each support plate 22. It is also possible to make it.
[0021]
  On the other hand, as shown in FIGS. 3 and 4, a driving fixing means 46 is provided at an extended end portion of the support plate 22 that is arranged to extend to the ground side. The driving and fixing means 46 maintains the fixed state of the support plate 22 with respect to the ground by driving and fixing the end portion side of the support plate 22, and prevents the position shift of the support plate 22, the lifting of the end portion, and the like. The entire frame of the retaining liner plate supported by the support plate 22 is stabilized at a predetermined position. As shown in FIG. 5, the driving and fixing means 46 is composed of two steel headed pile bodies, and vertically supports the support plate 22 through holes drilled in the vicinity of two corners of the support plate 22. While being penetrated, it is driven into the ground and fixed.
[0022]
  Next, the operation of the liner plate support device will be described together with the earth retaining method. An uppermost liner plate formed by excavating a circular hole having a diameter corresponding to the construction scale in the ground by a depth corresponding to the uppermost liner plate to be arranged and connecting a plurality of plate pieces 11 to the excavation hole. Wear 10a. As shown in FIG. 2, on the ground around the uppermost liner plate, a plurality (five in FIG. 2) of support plates 22 are horizontally placed on the ground at equal intervals and driven. The pile body which is the fixing means 46 is driven and fixed into the ground while penetrating the support plate 22. As shown in FIG. 3, the reinforcing rib members 28 are arranged on the inner side (hole side) of the liner plate on the lower side of each support plate 22 while fitting the unevennesses of the reinforcing plates to the inner surface side (hole side). The upper end of the support plate 22 and bolts and nuts are connected together with the uppermost liner plate. At this time, the ground side liner plate 40 is directly connected in a state where the support plate 22 is sandwiched between the upper layers of the uppermost liner plate 10a. The fixing member 42 is connected to the upper surface side of the support plate 22 (may be fixed to the support plate in advance), and the flange on the upper side of the ground side liner plate 40 and the upper end of the fixing member 42 are connected by bolts and nuts. The ground side liner plate 40 and the support plate 22 are integrally fixed to form the ground side three-dimensional reinforcing structure 30. The reinforcing means for supporting the entire liner plate frame of the support plate 22 is improved by the reinforcing means of the reinforcing rib member 28 and the ground side three-dimensional reinforcing structure 30 to ensure the workability and safety in the subsequent excavation hole. it can. In this manner, in a state where the liner plate is supported by the support device 22 including the support plate 22 and the reinforcing means, a hole is excavated to the depth of the next lower liner plate, and the lower liner plate 10b is assembled to the upper layer. Connect to the liner plate. Similarly, holes are excavated while retaining the earth to a required depth while forming the entire liner plate frame by repeating the operations of hole excavation and liner plate connection. After excavation, for example, foundation work of structures such as footings and pillars is performed. When those operations are completed, the lowermost liner plate is removed, and the holes are refilled accordingly, and thereafter, similarly, the liner plate is removed for each layer from the lower layer side to the upper layer side, and the hole is refilled. Fill the hole back while repeating the work. Then, the liner plate support device is detached from the uppermost liner plate and collected in the reverse procedure to the above. As a result, the recovered liner plate support device can be reused at other sites, so that the economy is good and environmental conservation can be achieved without discharging industrial waste.
[0023]
  The support device for the retaining liner plate and the retaining method using the same according to the present invention are not limited to the above-described embodiments, and may be arbitrarily selected without departing from the essence of the invention described in the claims. Modifications may be made. For example, the excavation hole is not limited to a circular shape, and may be excavated in an oval shape or the like, and is coupled and earthed by combining arc plates or straight liner plates according to the shape of the excavation hole. Even in this case, the liner plate is supported by the support device including the support plate and the reinforcing means as described above as in the above embodiment. Further, although the number of support units is five in the above-described embodiment, a plurality of support units such as 2, 3, 4, or 6 or more may be arranged. Further, the ground side liner plate is not limited to one layer, and may be extended so as to be a plurality of layers of two or more layers.
[0024]
【The invention's effect】
  As described above, according to the retaining liner plate support device of the present invention, a plurality of retaining liner plates are arranged on the upper layer side.ThingsLower layer sideStuffWhen drilling holes while connecting them one after the other, make a shallow drilling holeFittedTop liner plateSupportLiner plate connected to the lower layer sideAlsoThe liner plate is supported in a hanging shape.What isSince it is configured to be detachable and fixed, the support device can be recovered and reused after the required work, so that it is economical and environmental conservation is achieved without discharging any industrial waste such as waste concrete. be able to. Moreover, workability | operativity, such as installation and removal of a support apparatus, improves, and an operator's labor can be reduced.
[0025]
  The support device is connected to the uppermost liner plate and crosses at least the longitudinal direction in which the liner plate is arranged.UpBy including a support plate that extends, it is possible to support the liner plate that is continuously provided with a simple structure in a suspended support shape, and to easily attach and detach the support device, thereby reducing the labor of the operator. Can be reduced.
[0026]
  In addition, the support device has a reinforcing means for reinforcing the connection state between the support plate and the uppermost liner plate, so that the support device has sufficient strength to support the continuously provided liner plate in a suspended form. It can be secured, and the workability of excavation or foundation work of the structure is good and the safety of the worker can be secured.
[0027]
  Further, the reinforcing means includes a reinforcing rib member that is arranged in the vertical direction along the surface of the uppermost liner plate and is connected in a state where the upper part is coupled with the support plate and the uppermost liner plate. Reinforcement of the connection state of the support plate and the uppermost liner plate can be realized with a relatively small configuration, and the liner plate connected continuously is surely supported with sufficient strength to improve workability in the excavation hole and worker safety. It can be secured.
[0028]
  Further, the reinforcing means includes a ground side liner plate that extends vertically in the uppermost liner plate and is arranged in an L shape on the support plate, a ground side liner plate, and a support plate.WithThe support plate is assembled to a three-dimensional structure by including a ground-side three-dimensional reinforcing structure including a fixing member that is coupled to both and fixes the ground-side liner plate and the support plate integrally. By distributing the load applied to the connecting portion between the liner plate and the liner plate to each member, the support strength of the support device can be improved, and the workability in the excavation hole and the safety of the operator can be ensured. Further, since the support device itself can be configured to be lightweight while maintaining the support strength of the support device, the transportability and workability of the device are good. In addition, the ground side liner plate can prevent people, parts, tools, stones, or other objects from falling into the excavation hole from the ground, and can ensure the safety of workers on the ground and in the excavation hole.
[0029]
  Also the groundUpA liner plate that is supported by maintaining a fixed state between the support plate and the ground by providing a driving and fixing means for fixing the end side of the support plate that is extended to the ground. The overall stable state can be maintained, and workability in the excavation hole and worker safety can be ensured.
[0030]
  Further, the support device is configured by a plurality of support units intermittently arranged around the liner plate, so that one unit is relatively small without reducing the strength of supporting the continuously provided liner plates. It can be manufactured as a unitary structure, thereby improving transportability, installation and removal workability, and the like.
[0031]
  Furthermore, according to the earth retaining method of the present invention, a plurality of earth retaining liner plates are provided on the upper layer side.To thingsLower layer sideStuffWhen drilling holes while sequentially connecting, attach the uppermost liner plate to the shallow excavation hole at the start of excavation, and support the liner plate support device on the uppermost liner plate so that the lower liner plate is suspended. Removable installationTo supportEnd of drillingrearIn addition, since the support device is configured to be separated and recovered from the uppermost liner plate, the support device can be reused at another site, so it is economical and discharges industrial waste such as concrete. It is possible to preserve the environment without causing it to occur.
[Brief description of the drawings]
FIG. 1 is a required cross-sectional explanatory view showing an embodiment of a liner plate support device of the present invention.
FIG. 2 is an explanatory plan view of the support device of FIG. 1;
FIG. 3 is a partially enlarged explanatory view of FIG. 1;
FIG. 4 is a perspective explanatory view of a support device.
5 is an explanatory plan view of the support unit of FIG. 4;
6 is an explanatory view seen from the hole side of the support unit of FIG. 4;
FIG. 7 is a perspective explanatory view of a plate piece.
FIG. 8 is a longitudinal cross-sectional explanatory view of the plate piece of FIG. 7;
9 is a view showing a state in which the entire plate of the liner plate is formed by assembling the plates of FIG.
FIG. 10 is a cross-sectional explanatory view of a conventional earth retaining method.
[Explanation of symbols]
  10 liner plate
  12 Liner plate support device
  20 Support unit
  22 Support plate
  28 Reinforcing rib members
  30 Ground-side solid reinforcement structure
  40 Ground side liner plate
  42 Fixing member
  46 Driving and fixing means

Claims (5)

It is used when drilling holes while sequentially connecting a plurality of liner plates for earth retaining to those on the upper layer side.
The uppermost liner plate attached to the shallow excavation hole at the start of excavation is connected and supported, and the lower liner plate connected to the uppermost liner plate is also supported in a suspended manner, and these liner plates are detachably connected and fixed. A liner plate support device for earth retaining,
A support plate connected to the uppermost liner plate and extending on the ground so as to intersect the vertical direction;
Reinforcing means for reinforcing the connection between the support plate and the uppermost liner plate,
The reinforcing means is arranged in a vertical direction along the surface of the uppermost liner plate, the upper part is connected with the support plate and the uppermost liner plate, and the lower part is connected with the lower part of the uppermost liner plate and the lower liner plate. A support device for a retaining liner plate having a rib member . The reinforcing means is connected to both a ground side liner plate extending in a vertical direction on the uppermost liner plate and arranged in an L shape on the support plate, and both the ground side liner plate and the support plate. The earthing liner plate support device according to claim 1 , further comprising a ground-side three-dimensional reinforcing structure including a fixing member that integrally fixes the liner plate and the support plate . 3. The support device for a retaining liner plate according to claim 1 or 2, further comprising driving-in fixing means for fixing an end portion side of a support plate arranged extending on the ground to the ground . The supporting device for a retaining liner plate according to any one of claims 1 to 3, wherein the supporting device includes a plurality of support units arranged intermittently around the liner plate. A earth retaining method using the retaining liner plate support device according to any one of claims 1 to 4,
When drilling holes while sequentially connecting multiple earth retaining liner plates to those on the upper layer side,
Attach the uppermost liner plate to the shallow excavation hole at the start of excavation, attach the liner plate support device to the upper part of the uppermost liner plate, support it, and connect the lower liner plate to the uppermost liner plate. Let it hang down on the liner plate support device,
A soil retaining method using a soil retaining liner plate support device, wherein the support device is separated from the uppermost liner plate and collected after excavation .

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