Ground improvement apparatus capable of using surface and interlayer

Abstract

The present invention is a ground improvement device capable of both surface and middle layers, comprising a layer-combining blender equipment (2) capable of surface ground improvement, expanded surface ground improvement, and middle layer ground improvement; wherein the layer-combining blender equipment (2) comprises: A link connecting member (8) for an excavator that is detachably linked to the tip of the arm (6) of an excavator (4) and has bolt fastening holes (54) in the plate body for fastening with a blender equipment; an extension fastening head (22) that has an internal space in which a plurality of drive sprockets (28) installed on the shaft of a hydraulic motor (24) and a plurality of drive sprockets (28) are housed, and has an upper fastening part (50) for bolting with the link connecting member (8) for an excavator or bolting with an extension boom (12) for multi-layer improvement, and a side wall fastening part (52) for bolting with a bridge block (10) for dual blender configuration; a blender casing (20) that has a plurality of driven sprockets (32) in the foot part together with the extension fastening head (22), and houses sprocket chains (34) connected between the drive and driven sprockets (28) (32) in the body part; The blender casing (20) is equipped with a mixing and dispersing unit (30) installed on the hub shaft of the driven sprockets (32) and a ground improvement injection pipe (48) installed toward the mixing and dispersing unit (30).

Description

Technology Field

[0001] The present invention relates to a ground improvement device, and more specifically, to a ground improvement device that can be used for construction on dry surface ground and surface ground with high moisture content, and can be used for ground improvement of not only surface ground but also mid-layer ground. Background Technology

[0002] In general, ground improvement methods serve various purposes, such as increasing ground bearing capacity, preventing differential settlement, and reinforcing foundations, and there are also various types of ground improvement methods.

[0003] Among these, methods that increase ground strength by injecting and hardening grouting materials such as chemical solutions or cement milk into the ground, or chemical injection methods that inject grouting materials at high pressure to mix with soil and form a solidified mass, are widely used.

[0004] Ground improvement is classified into three categories—surface, middle, and deep—depending on the stratum to be improved, and improvement methods suitable for each stratum are utilized. Additionally, various improvement methods are applied depending on the soil type.

[0005] Among the ground improvement methods, the dry surface improvement method is an example of surface improvement using chemical injection.

[0006] The dry surface improvement method solidifies the surface layer of the dry original ground by mixing it with a reinforcing injection material (such as chemical solution or cement milk). This process can be performed using compact equipment like excavators, allowing the dry surface to be mixed with the injection material. The bearing capacity of the surface is secured by achieving a predetermined strength through the solidification process following mixing.

[0007] The dry surface improvement method using such miniaturized equipment has the advantages of fast construction, immediate on-site application, and low construction costs.

[0008] However, dry surface improvement methods utilizing small equipment such as excavators have the disadvantage of failing to improve the soil or achieve the required hardening strength in areas with high moisture content. Above all, this method is impossible to apply in wetlands with excessive water, as hardening does not occur. Furthermore, airborne dust poses a high risk of complaints in densely populated urban areas; mobility is reduced due to the extensive use of equipment, such as mixers; and construction in confined spaces is impossible.

[0009] In addition, there are separate pieces of equipment for wet surface improvement methods and mid-layer ground improvement, but if a device capable of accommodating all of them is implemented, it will receive a great response from the relevant parties. Prior art literature

[0010] Published Patent Application No. 10-2007-0083874 "Composition for ground improvement, injection material using the same, and method of use thereof" Registered Patent Application No. 10-1024939 "Improved auger screw assembly for excavators" The problem to be solved

[0011] Therefore, the objective of the present invention is to provide a ground improvement device that can be used for both surface ground improvement and mid-layer ground improvement, and which can be used for surface ground improvement in dry conditions as well as in areas with high moisture content. means of solving the problem

[0012] The present invention, according to the above-mentioned purpose, comprises a ground improvement device capable of both surface and middle layers, wherein the device is equipped with a layer-combining blender that enables surface ground improvement or expanded surface ground improvement and enables middle layer ground improvement;

[0013] The above layer-combining blender equipment is;

[0014] A link connecting member for an excavator that is detachably linked to the tip of the arm of the excavator and has bolt fastening holes in a plate body for fastening with a blender device; an extension fastening head having an internal space in which a hydraulic motor and a plurality of drive sprockets installed on the hydraulic motor shaft are housed, and having an upper fastening part for bolting with the link connecting member for the excavator or with an extension boom for mid-layer improvement and a side wall fastening part for bolting with a bridge block for dual blender configuration; a blender casing having a plurality of driven sprockets in the foot portion together with the extension fastening head and housing sprocket chains connected between the drive and driven sprockets in the body portion; a mixing and discharging unit installed on the hub shaft of the driven sprockets in the foot portion of the blender casing, and a ground improvement injection pipe installed toward the mixing and discharging unit.

[0015] The above stirring device is characterized by having left and right hub shafts installed and each of the left and right hub shafts fixed to a flange-type spindle, with a wing plate attached to the flange-type spindle in a triangular or square configuration, and a stirring blade member having 2 to 4 stirring bites arranged in a circumferential direction attached to the upper surface of the outer perimeter of the wing plate.

[0016] In addition, the ground improvement device of the present invention, capable of being used for both surface and middle layers, is characterized by having a bridge block for bolting two layer-combining blender devices side by side for a dual blender configuration for expanded surface ground improvement, wherein a bridge side wall fastening part is formed on each of the left and right side walls of the bridge block, and a bridge upper fastening part is formed on the upper surface of the bridge block for bolting to an excavator link connecting member that is detachably linked to the tip of the excavator arm.

[0017] In addition, the ground improvement device of the present invention, capable of being used for both surface and middle layers, is further characterized by having an extension boom for middle layer improvement, having a boom lower fastening part bolted to an upper fastening part of an extension fastening head of a layer-compatible blender equipment and a boom upper fastening part bolted to an excavator link connecting member that is detachably linked to the tip of the excavator arm, for middle layer ground improvement. Effects of the invention

[0018] The present invention has the advantage of being applicable to dry surface ground and surface ground with high moisture content when performing ground improvement, and can be used for ground improvement of not only surface ground but also mid-layer ground. Brief explanation of the drawing

[0019] FIG. 1 is a perspective view of a layer-combining blender equipment for a ground improvement device capable of serving both surface and middle layers according to an embodiment of the present invention. FIG. 2 is a schematic front and side cross-sectional view of the layer-combination blender equipment of FIG. 1. FIG. 3 is a diagram showing the usage state of a layer-combining blender device mounted on an excavator for surface ground improvement according to the present invention. FIG. 4 is a drawing showing that the layer-compatible blender equipment of the present invention can be converted to have expandability for surface ground improvement or for mid-layer ground improvement. FIG. 5 is an exploded perspective view relating to a casing head and a link connecting member for an excavator, for mounting the layer-combining blending equipment of the present invention in a basic form on an excavator or on an extension boom for mid-layer improvement. FIG. 6 is an exploded perspective view relating to the casing head of the blender equipment and the link connecting member for an excavator when the layer-combining blender equipment of the present invention is expanded into a dual mixing device. FIG. 7 is a diagram showing the arrangement of a rectangular improved form for forming an improved body by a vertical drilling and stirring operation for layer improvement using the layer-combined blender equipment of the present invention. FIG. 8 is a schematic diagram showing the procedure for improving the surface layer using the layer-combining blender equipment of the present invention. Specific details for implementing the invention

[0020] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] FIG. 1 is a perspective view of a layer-combined blender equipment (2) for a ground improvement device capable of both surface and middle layers according to an embodiment of the present invention, FIG. 2 is a schematic side cross-section (a) and front cross-section (b) of the layer-combined blender equipment (2) of FIG. 1, FIG. 3 is a view of the state of use in which the layer-combined blender equipment (2) is mounted on an excavator (4) for surface ground improvement according to the present invention. FIG. 4 is a drawing showing that the layer-combined blender equipment (2) of the present invention can be converted to have expandability for surface ground improvement or for middle ground improvement.

[0022] Figure 3 shows a layer-combining blender (2) adopted according to the present invention being linked to the arm (6) of an excavator (4) to perform improvement work on the surface ground.

[0023] According to the present invention, a layer-combined blender equipment (2) as shown in FIG. 1 and FIG. 2, which is linked to an excavator (4), can be used for surface ground improvement at a depth of about 1 to 2 meters as shown in FIG. 3, and can also be used for mid-layer ground improvement at a depth of 2 to 5 meters by utilizing the extension boom (12 in FIG. 4) adopted in the present invention.

[0024] With reference to FIG. 4, the layer-combined blender equipment (2) of the present invention can be used alone when performing surface ground improvement using an excavator (4), as shown in FIG. 4 (a), but the layer-combined blender equipment (2) can also be used in dual as shown in FIG. 4 (b), with two layer-combined blender equipment (2) connected side by side via a middle bridge block (10).

[0025] First, as shown in Fig. 4 (a), when using the layer-combining blender equipment (2) alone, the excavator link connecting member (8) is bolted to the head of the layer-combining blender equipment (2), and then the excavator link connecting member (8) of the layer-combining blender equipment (2) is linked to the arm (6) of the excavator (4).

[0026] And when using dual layer blending equipment (2) as in Fig. 4 (b), a bridge block (10) is placed between the heads of two layer blending equipment (2) placed side by side, and the casing heads of the layer blending equipment (2) on the left and right sides are bolted together with the bridge block (10) to form an integrated unit. After that, a link connecting member (8) for an excavator is bolted to the upper part of the bridge block (10), and then the link connecting member (8) for an excavator of the layer blending equipment (2) is linked to the arm (6) of the excavator (4).

[0027] In the present invention, when surface ground improvement is performed as in FIG. 4 (a) or FIG. 4 (b), construction is possible on dry surface ground, and construction is also possible on surface ground with high moisture content.

[0028] In addition, as shown in Fig. 4 (c), the extension boom (12) can be connected to the layer-combined blender equipment (2) so that it can also be used for layer-combined ground improvement.

[0029] That is, the extension boom (12) for improving the middle layer is bolted to the head of the floor-combining blender equipment (2), and the link connecting member (8) for the excavator is bolted to the upper part of the extension boom (12) for improving the middle layer, and then the link connecting member (8) for the excavator of the floor-combining blender equipment (2) is linked to the arm (6) of the excavator (4).

[0030] FIG. 5 is an exploded perspective view relating to a casing head and a link connecting member (8) for an excavator, for mounting the layer-combining blender equipment (2) of the present invention in a basic form on an excavator (4) or on an extension boom (12) for layer improvement, and FIG. 6 is an exploded perspective view relating to a casing head of a blender equipment (2) and a link connecting member (8) for an excavator when the layer-combining blender equipment (2) of the present invention is expanded into a dual mixing device.

[0031] The configuration of a layer-combining blender equipment (2) for a ground improvement device capable of both surface and middle layers according to the present invention will be explained in detail with reference to FIGS. 1 and 2, and FIGS. 5 to 6.

[0032] The layer-combined blender equipment (2) of the present invention is equipped with a blender casing (20) having an expansion connection head (22) that allows for surface layer, middle layer, or surface layer expansion using an excavator (4), and is equipped with an excavator link connection member (8) provided as an independent component so that the blender equipment (2) can be directly or indirectly linked to the excavator (4).

[0033] The link connecting member (8) for an excavator according to the present invention is a means having bolt fastening holes (54) for joint fastening with a blender equipment (2) or a bridge block (10) that is detachably linked to the tip of the arm (6) of an excavator (4) as shown in FIG. 3.

[0034] The layer-combined blender equipment (2) of the present invention can be bolted to the extension boom (12) for layer improvement alone or to the bridge block (10) when constructing a dual blender device using the bridge block (10).

[0035] The expansion connection head (22) provided in the head portion of the blender casing (20) according to the present invention has an internal space in which a plurality of drive sprockets (28) installed on the hub shaft (26) of the hydraulic motor (24) are housed, and a box surface is formed on the upper and side faces to connect with the excavator (4) or the extension boom (12) for mid-layer improvement, or to connect with the layer-combining blender equipment (2) placed side-by-side to be expanded into a dual blender device.

[0036] On the upper box surface of the extension fastening head (22), an upper fastening part (50) is provided for bolt fastening with the link connecting member (8) for an excavator as shown in FIG. 5, or bolt fastening with the extension boom (12) for mid-layer improvement as shown in FIG. 4 (c). The upper fastening part (50) of the extension fastening head (22) is configured to have fastening holes (54) that are aligned with the link connecting member (8) and the extension boom (12), and is secured by bolts (18).

[0037] The extension boom (10) for mid-layer improvement shown in Fig. 4 (c) is a means for mid-layer ground improvement using blender equipment (2), and has a boom lower fastening part (12a) that is bolted to the upper fastening part (50) of the extension fastening head (22) of the layer-combining blender equipment (2), and a boom upper fastening part (12b) that is bolted to the excavator link connecting part (8) that is detachably linked to the tip of the arm (6) of the excavator (4).

[0038] In addition, in FIGS. 1 and 2, the side box surface of the extension fastening head (22) of the blender casing (20) is also provided with a side wall fastening part (52) for bolt fastening with a bridge block (22) for dual blender configuration, as shown in FIG. 6. The side wall fastening part (52) of the extension fastening head (22) is configured to have fastening holes (54) that are aligned with the fastening holes of the bridge block (22) and are fastened and fixed with a bolt (18 in FIG. 16).

[0039] The bridge block (10) illustrated in FIG. 6 is a connecting means for bolting two layer-combining blender equipment (2) side by side to side for a dual blender configuration for expanded surface ground improvement. The bridge block (10) is a rectangular box made of metal material with a large hollow opening in the front and rear to facilitate bolt fastening. On each of the left and right side walls of the bridge block (10), a bridge side fastening part (14) is formed to be bolted to the side wall fastening part (52) of the blender equipment (2), and on the upper surface of the bridge block (10), a bridge upper fastening part (16) is formed to be bolted to the excavator link connecting part (8) which is detachably linked to the tip of the arm (6) of the excavator (4).

[0040] Meanwhile, the blender casing (20) of the present invention has a box-shaped expansion fastening head (22) as shown in FIGS. 5 and 6.

[0041] Referring to FIG. 2, the component configuration including the blender casing (20) constituting the blender equipment (2) of the present invention is described in more detail. The blender casing (20) has an extended fastening head (22) and a plurality of driven sprockets (32) are housed in the foot portion, and a sprocket chain (34) connected between the driving and driven sprockets (28) (32) is housed in the body portion.

[0042] Additionally, between the driving and driven sprockets (28)(32), a tension adjustment sprocket (44) for adjusting tension is connected to the sprocket chain (34), and a chain tension adjustment member (46) for adjusting the chain pressure position of the tension adjustment sprocket (44) is configured to be exposed on the outer surface of the blender casing (20).

[0043] According to the present invention, the part of the blender casing (20) is provided with a stirring part (30) installed on the hub shaft (36) of the driven sprockets (32) to perform a mixing role during ground improvement.

[0044] The stirring and drive unit (30) of the present invention has a shape similar to a drive unit. The stirring and drive unit (30) is configured such that left and right driven hub shafts (35) are each axially installed on a driven sprocket (32) embedded in the foot portion of a blender casing (20), and a flanged spindle (36) is axially fixed to each of the left and right driven hub shafts (35).

[0045] A wing plate member (38) is configured to be attached to the flange-shaped spindle (36) of the stirring block (30) in a triangular or square configuration, and as shown in (b) or (c) of FIG. 2, a stirring blade member (42) is configured to be attached to the upper surface of the outer perimeter plate (38a) on the upper side of the wing plate member (38), with 2 to 4 stirring bits (40) arranged in a circumferential direction.

[0046] FIGS. 1 and 2 show an example in which a wing plate (38) is connected to a flanged spindle (36) in a triangular configuration, and one stirring blade member (42) is provided with four stirring bites (40).

[0047] In addition, the layer-combined blender equipment (2) of the present invention is equipped with an injection pipe (48) for injecting ground improvement injection material, wherein the ground improvement injection material injection pipe (48) is sufficiently extended to the mixing and discharging unit (30) and is installed facing the mixing and discharging unit (30).

[0048] The ground improvement injection material injected through the ground improvement injection pipe (48) can be a chemical solution or cement milk, and an eco-friendly solidification agent (e.g., geodide) can be used.

[0049] In the present invention, when performing ground improvement, a single-layer blender device (2) for layer improvement as shown in Fig. 4 (a) or a dual blender device having surface ground improvement expandability as shown in Fig. 4 (b) can be used to perform surface improvement on dry surface ground or surface ground with high moisture content in the manner shown in Fig. 3.

[0050] In addition, in the present invention, as shown in Fig. 4 (c), an extension boom (12) for improving the middle layer of the ground with a length of 2 to 3 meters is additionally installed on the layer-combining blender equipment (2), and then the ground improvement of the middle layer of the ground can be performed by utilizing an excavator (4).

[0051] FIG. 7 is a diagram showing a rectangular arrangement of improved forms that forms an improved body through a vertical drilling and stirring operation for improving a layer using the layer-combining blender equipment (2) of the present invention.

[0052] In the present invention, a layer-combined blender (2), an extension boom (12) for layer improvement with a length of 2 to 3 meters, and an excavator (4) are used to form a layer improvement body (70) by drilling vertically for about 2 to 5 meters and mixing with a ground improvement injection material as shown in FIG. 7 (a), and each layer improvement body (70) is drilled in a square cross-section shape as shown in FIG. 7 (b), and layer improvement is performed by drilling the square layer improvement bodies (70) in a matrix arrangement.

[0053] FIG. 8 is a schematic diagram showing the procedure for improving the surface layer using the layer-combining blender equipment (2) of the present invention.

[0054] In the present invention, a foundation bottom surface as shown in (a) of Fig. 8 may be formed by performing a multi-layer ground improvement operation as shown in Fig. 7, or if only surface ground improvement is performed, the work of excavating down to the foundation bottom surface and collecting soil is performed using an excavator.

[0055] After that, as shown in Fig. 8 (b), the softened soil collected on the bottom of the foundation is filled again, and the surface ground is solidified by mixing with the ground improvement injection material using the layer-combining blender equipment (2) of the present invention. After that, the surface improvement is completed by performing a leveling operation of laying and compacting as shown in Fig. 8 (c).

[0056] Although specific embodiments have been described in the foregoing description of the present invention, various modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should not be determined by the described embodiments but by the claims and equivalents thereof. Explanation of the symbols

[0057] (2)-- Layer blender equipment (4)-- Excavator (6)-- Arm (8)-- Link connecting member for excavator (10)-- Bridge block (12)-- Extension boom for mid-rise improvement (14)-- Bridge lateral fastening part (16)-- Bridge upper fastening part (18)-- bolt (20)-- Blender casing (22)-- Extended fastening tofu (24)-- Hydraulic motor (26)-- Hub shaft (28)-- Drive sprocket (30)-- Mixing mechanism (32)-- Driven sprocket (34)-- Sprocket chain (35)-- Driven hub shaft (36)-- Flanged spindle (38)-- Wing plate (38a)-- Outer perimeter strip (40)-- Stirring Bite (42)-- Stirring Blade Member (44)-- Tension adjustment sprocket (46)-- Chain tension adjuster (48)-- Ground improvement injection pipe (50)-- Upper connection part (52)-- Side wall fastening part (54)-- Bolt fastening hole (70)-- Improvement

Claims

Claim 1 In a ground improvement device capable of both surface and middle layers, the device is equipped with a layer-combining blender that enables surface ground improvement or expanded surface ground improvement and enables middle layer ground improvement; wherein the layer-combining blender is: A link connecting member for an excavator that is detachably linked to the tip of the excavator arm and has bolt fastening holes in a plate body for fastening with a blender device; an expansion fastening head having an internal space in which a hydraulic motor and a plurality of drive sprockets installed on the hydraulic motor shaft are housed, and having an upper fastening part for bolting with the link connecting member for the excavator or with an extension boom for mid-layer improvement, and a side wall fastening part for bolting with a bridge block for dual blender configuration; a blender casing having a plurality of driven sprockets in the foot portion together with the expansion fastening head, and housing sprocket chains in the body portion so as to connect between the drive and driven sprockets; a mixing discharge unit installed on the hub shaft of the driven sprockets in the foot portion of the blender casing, and a ground improvement injection material injection pipe installed facing the mixing discharge unit, wherein the mixing discharge unit has left and right hub shafts installed and is fixed to a flanged spindle on each of the left and right hub shafts, and the flanged spindle has a triangular configuration or A ground improvement device capable of being used for both surface and middle layers, characterized by being configured such that a wing plate is fastened in a square structure, and a stirring blade member having 2 to 4 stirring bites arranged circumferentially is fastened to the upper surface of the outer perimeter strip on the upper side of the wing plate. Claim 2 A ground improvement device capable of both surface and middle layers according to claim 1, characterized in that it is provided with a bridge block for bolting two layer-compatible blender devices side by side for a dual blender configuration for expanded surface layer ground improvement, wherein a bridge side wall fastening part is formed on each of the left and right side walls of the bridge block, and a bridge upper fastening part is formed on the upper surface of the bridge block for bolting to an excavator link connecting member that is detachably linked to the tip of the excavator arm. Claim 3 A ground improvement device capable of both surface and middle layers, characterized in that, in claim 1 or 2, for middle layer ground improvement, it further comprises an extension boom having a boom lower fastening part bolted to an upper fastening part of an extension fastening head of a layer-combining blender equipment and a boom upper fastening part bolted to an excavator link connecting member detachably linked to the tip of the excavator arm.

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