Device for controlling expansion range of fluid soil

Abstract

The utility model relates to the field of pile foundation engineering, in particular to a device for controlling the expansion range of fluid soil, which comprises a central cylinder, a movable block, a traction mechanism, an expansion rod, a support rod and an isolating layer, extension blocks are arranged at the top of the central cylinder; a side edge groove is formed in the side wall of the central cylinder; a guide groove is formed in the center cylinder, and the side grooves communicate with the guide groove. The movable block is arranged in the central cylinder; the traction mechanism is used for pulling the movable block to move relative to the central cylinder; the expansion rod is divided into two sections, one end of the expansion rod is rotationally connected with the extension block, and the other end is rotationally connected with the long block; the support rod is connected with the joint of the two sections of the expansion rod; the isolating layer is fixedly connected to the supporting rods and arranged on the outer sides of all the supporting rods. Before the cast-in-situ bored pile is constructed, the cast-in-situ bored pile is placed in an underground karst cave area and then expanded, so that the expansion range of fluid soil is controlled when the karst cave is filled with the fluid soil, and material waste is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a device in the field of pile foundation engineering, in particular to a device for controlling the expansion range of flowable soil. BACKGROUND

[0002] In China, karst landforms are widely distributed, and the area of karst regions accounts for about 1 / 3 of the national territory. When building highway bridges in karst regions, bored pile foundations are generally used, and mud wall protection is often used during construction. When encountering large karst caves, materials such as stone + clay and plain concrete are often backfilled first, and then the hole is formed. Currently, there are two problems with bored piles in karst regions: first, when filling karst caves with loose materials such as stone + clay, slurry leakage often occurs, which seriously affects the construction period; second, the backfill quality of materials such as stone + clay is difficult to guarantee, which makes it difficult to estimate the pile side friction of the bored pile in the karst cave section, so the pile foundation in the karst region of the project is often designed as an end-bearing pile, which increases the length or diameter of the pile, thereby increasing the cost of the project.

[0003] In recent years, flowable soil technology has been widely used in the fields of foundation pit trench backfilling and karst cave backfilling. Flowable soil is a mixture of soil, curing agent, additive and water in a certain proportion, which has a certain fluidity and can achieve the expected strength after solidification. The application of flowable soil in the bored pile engineering of karst regions not only effectively solves the problem of slurry leakage during the construction process of bored piles, but also significantly improves the pile side friction of the karst cave section.

[0004] When filling karst caves with flowable soil, it is not necessary to completely fill the entire karst cave, but only to ensure that there is no slurry leakage during construction and that the pile side friction is transmitted. In general, the filling range is 3-5 times the diameter of the pile. If the diffusion range of flowable soil is too large, it will result in unnecessary material waste and an increase in project cost. Therefore, a device is needed to control the expansion range of flowable soil to improve the construction level of flowable soil and reduce waste. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the problem of excessive diffusion range of flowable soil in the prior art, which leads to unnecessary material waste and an increase in project cost, and provides a device for controlling the expansion range of flowable soil during the construction of bored pile foundations in karst regions. The device is placed in the underground karst cave area before the construction of bored piles and then expanded, thereby controlling the expansion range of flowable soil when filling karst caves with flowable soil and reducing material waste.

[0006] In order to achieve the above-mentioned purpose of the invention, the utility model provides the following technical scheme:

[0007] A device for controlling the expansion range of flowable soil, comprising a central cylinder, a movable block, a traction mechanism, an expansion rod, a strut and a separation layer.

[0008] The central cylinder is provided with a guide groove which penetrates the top of the central cylinder along the axial direction of the central cylinder;

[0009] At least three extension blocks are fixedly arranged on the outer wall of the top side of the central cylinder; a side groove is arranged on the side wall of the central cylinder directly below the extension blocks, and the side groove penetrates into the interior of the central cylinder and is in communication with the guide groove;

[0010] The movable block is arranged in the central cylinder, and the movable block comprises a guide rod and a long block; the number of the long blocks is the same as that of the extension blocks; the guide rod is arranged in the guide groove and can move up and down along the axial direction of the central cylinder; the long blocks are respectively arranged in the side grooves and protrude out of the central cylinder at the ends thereof after penetrating through the side grooves;

[0011] The long blocks are respectively arranged in the side grooves, and all the long blocks are connected into one body at the central cylinder; the long blocks protrude out of the central cylinder at the ends thereof after penetrating through the side grooves;

[0012] The traction mechanism is connected with the guide rod;

[0013] The expansion rod is divided into two sections, and the two sections of the expansion rod are movably connected; the pivot point is free to rotate; one end of the expansion rod is rotatably connected with the extension block, and the other end of the expansion rod is rotatably connected with the long block;

[0014] The support rod is connected with the pivot point of the two sections of the expansion rod;

[0015] The isolation layer is fixedly connected with the support rod, and the isolation layer is arranged on the outer side of all the support rods.

[0016] The interior of the central cylinder is provided with a guide groove which penetrates the top of the central cylinder; at least three extension blocks are arranged on the side wall of the top of the central cylinder; a side groove is arranged on the side wall of the central cylinder directly below the extension blocks, and the side groove is in communication with the guide groove; a movable block is arranged in the central cylinder, and the movable block comprises a guide rod and a long block; the guide rod and the long block are fixedly connected; the guide rod is arranged in the guide groove, and the long block is arranged in the side groove; the movable block can move relative to the central cylinder through the guide groove and the side groove; the number of the long blocks, the number of the side grooves and the number of the extension blocks are the same; a traction mechanism is used to pull the guide rod and further drive the movable block to move; the expansion rod is divided into two sections, and the two sections of the expansion rod are movably connected; the two ends of the expansion rod are rotatably connected with the extension block and the long block, respectively; the connection point of the two sections of the expansion rod is connected with the support rod; the isolation layer is fixedly connected with the support rod, and the isolation layer is arranged on the outer side of all the support rods; the isolation layer can be completely supported by the support rod.

[0017] When the installation device is installed, the long blocks are located in the side slot of the central cylinder, the guide rods are located in the guide slots, the traction mechanism is connected to the guide rods, the extension blocks and the long blocks are respectively connected to the two ends of the extension rods, the extension rods are divided into two sections, the two sections are movably connected, the connection between the two sections is connected to the support rods, and the isolation layer is fixedly connected to the support rods. Before the support rods are not opened, the isolation layer between the adjacent support rods is folded. In the use process, the guide rods are pulled through the traction mechanism, the guide rods drive the long blocks to rise together, the distance between the long blocks and the extension blocks gradually decreases in the rising process of the long blocks, the extension rods are folded and pushed out of the support rods, and the support rods are gradually tightened in the process of being pushed out, thereby creating a pouring space. The scheme can effectively solve the leakage problem in the construction process of the cast-in-place pile, and can also significantly improve the pile side friction resistance of the karst cave section.

[0018] Preferably, the extension blocks are wound with coils on the outer side; the long blocks are wound with coils on the outer side; and the extension blocks, the long blocks and the extension rods are all made of magnetic materials.

[0019] Preferably, the extension blocks, the long blocks and the extension rods are made of one of silicon steel or nickel-iron alloy.

[0020] By winding coils on the outer side of the extension blocks and the long blocks, the extension blocks and the long blocks have magnetism after being electrified, and the extension rods are connected to the extension blocks and the long blocks through magnetism. When it is necessary to disconnect, the power supply is only needed to be disconnected, so that the extension rods are disconnected from the extension blocks and the long blocks.

[0021] Preferably, the extension rods are connected to the support rods through hooks or hinged connection.

[0022] The two sections of the extension rods are movably connected, and the connection between the two sections of the extension rods is connected to the support rods through hooks or hinged connection. The connection through hooks or hinged connection can realize the relative rotation of the extension rods and the support rods, so as to realize the action of pushing the support rods away by the extension rods.

[0023] Preferably, the isolation layer is one of nylon cloth, polyester fiber cloth or polyester fabric.

[0024] The nylon cloth has the advantages of strong wear resistance, corrosion resistance, high temperature resistance, good mechanical strength and toughness, etc.; the polyester fiber has very high strength and elasticity, in addition, the polyester fiber has good resistance to various chemicals, and is less damaged by acid and alkali, and is not afraid of mildew or insect damage, and is suitable for being used as the isolation layer of the fluid soil.

[0025] Preferably, the number of the extension blocks is 12.

[0026] The number of the extension blocks is 12, and the number of the long blocks, the side edge slots, the extension rods and the support rods is also 12, wherein every 30 degrees of the outer edge of the top surface of the center tube outwardly extends an extension block, the side edge slots are arranged below the extension blocks, and the extension rods and the support rods are correspondingly installed around the center tube, and the 12 extension blocks can further guarantee the stability of the flow state soil expansion range device.

[0027] Preferably, the traction mechanism is a motor and a steel cable, the steel cable is connected with the guide rod, and the motor is used for driving the steel cable.

[0028] The movable block is driven by the motor and the steel cable, so that the traction difficulty is greatly reduced, the operation is facilitated, and the danger coefficient is reduced.

[0029] Preferably, the support rod is made of metal.

[0030] The support rod made of metal has greater strength and is more conducive to supporting the isolation layer.

[0031] Preferably, the support rod is fixedly connected with the isolation layer.

[0032] Preferably, the support rod is fixedly connected with the isolation layer through glue or a steel wire.

[0033] The support rod is fixedly connected with the isolation layer, in the installation, the isolation layer is pre-folded, the support rod and the extension rod are connected, and then the support rod is pushed away to support the isolation layer.

[0034] Compared with the prior art, the device has the advantages that:

[0035] The device for controlling the expansion range of flow state soil is placed in a underground karst cave area before bored pile construction and then is expanded, so that the expansion range of flow state soil is strictly controlled in the design range, material is effectively utilized, unnecessary waste is avoided, construction efficiency and pile body quality are greatly improved, and a solid foundation is laid for safety and stability of subsequent engineering.

[0036] The device for controlling the expansion range of flow state soil has the advantages that the center tube and the movable block can be recycled and reused, waste of core components is reduced, and resource reuse rate is increased. DETAILED DESCRIPTION

[0037] Figure 1 It is a whole structure schematic view of the device.

[0038] Figure 2 It is a cross section structure schematic view of the device.

[0039] Figure 3 It is a plane schematic view of the support rod and the isolation layer.

[0040] Figure 4is a schematic view of the long block structure.

[0041] Figure 5 is a schematic view of the central tube front structure.

[0042] Marked in the figure:

[0043] 1 - central tube,

[0044] 11 - guide slot, 12 - extension block,

[0045] 2 - long block, 3 - guide rod, 4 - expansion rod, 5 - side slot, 6 - coil, 7 - isolation layer, 8 - strut, 9 - hinge. DETAILED DESCRIPTION

[0046] In order to more clearly describe the utility model purpose, technical scheme and technical effect advantage of the specific implementation case of the present application, the following will be combined with the drawings of the present application to make a detailed description of the scheme in the specific embodiment. The specific technical scheme involved in the following specific embodiment is only for clearly and completely describing the innovative technical scheme of the present application, and itself is only a part of the specific implementation scheme that can be adopted by the present application, not all the embodiments, and should not be understood as the limitation of the innovative scheme of the present application. Any scheme adopting the same inventive concept of the present application should be included in the protection scope of the present application.

[0047] Secondly, the related description of the drawings involved in the specific embodiment of the present application is only for facilitating the understanding of the present application scheme by the technicians, and part of the details in the drawings is displayed for facilitating the clear presentation of the technical scheme, and should not be considered that all the technical features in the drawings must be included in the specific implementation case, and more cannot be considered as the additional limitation of the innovative technical scheme of the present application. The components in each embodiment described and exhibited in the drawings can be combined and arranged in different configurations, and these combination and arrangement changes should be considered as a part of all the embodiments of the innovative scheme of the present application, and should be included in the protection scope of the present application.

[0048] It should be noted that, in the description of the embodiments of the present application, the terms of orientation or position relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", and the like, are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / device / apparatus of the present application is normally used. These terms of orientation or position relationship are only for the convenience of describing the present application or simplifying the description of the embodiments, and for the convenience of the skilled person to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present application.

[0049] In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the corresponding device / component / element must be absolutely horizontal or vertical or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is set in a specific direction such as "horizontal", "vertical", "overhanging", etc., and can have an error / bias of ±10% relative to the corresponding direction, more preferably an error / bias of ±8% or less, more preferably an error / bias of ±6% or less, more preferably an error / bias of ±5% or less, and more preferably an error / bias of ±4% or less. As long as the corresponding device / component / element is within the error / bias range, it can still achieve its role in the present application scheme.

[0050] In addition, in the description of the embodiments of the present application, "several", "a plurality of", and "several" represent at least 2. It can be 3, 4, 5, 6, 7, 8, 9, etc. in any case, or even more than 9.

[0051] In addition, in the description of the technical scheme of the present application, unless otherwise specified / limited / limited, the terms "set", "install", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screwing, etc. The connection means commonly used in the art. Such connection can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements.

[0052] For those skilled in the art, when understanding the scheme of the embodiment of the utility model, reference can be made to the conventional technical manual in the art, and at the same time, for the above-mentioned terms, reference can be made to the appropriate understanding or adjustment, and the same or similar technical scheme implementation conditions can be deduced without creative labor.

[0053] Embodiment 1

[0054] As Figures 1-5 shown, a device for controlling the extension range of flow state soil, the top of the central cylinder 1 is provided with a guide groove 11, the guide groove 11 is axially through the top of the central cylinder 1.

[0055] The top side outer wall of the central cylinder 1 is also provided with twelve extension blocks 12, the spacing between each extension block 12 is equal (there can be an error allowed by construction without affecting the function implementation); the side wall of the central cylinder 1 below the extension block 12 is provided with twelve side grooves 5, the side groove 5 penetrates to the inside of the central cylinder 1, so that the side groove 5 is communicated with the guide groove 11.

[0056] The movable block is arranged in the central cylinder 1, and the movable block comprises a guide rod 3 and twelve long blocks 2. Among them, the guide rod 3 is arranged in the guide groove 11 and can move up and down in the axial direction of the central cylinder. As Figure 4 shown, the twelve long blocks 2 are in the same plane, and the included angle between each long block 2 is 30°, and one end of all long blocks 2 is fixedly connected together, and then connected with the guide rod 3. As Figure 2 shown, the long block 2 penetrates through the side groove 5 and the end thereof extends out of the central cylinder 1. The guide rod 3 and the long block 2 are fixedly connected, and when the guide rod 3 moves up and down in the guide groove 11, it drives each long block 2 to move up and down in the side groove 5 where it is located.

[0057] A traction mechanism is arranged, the traction mechanism is a motor and a steel cable, the steel cable is connected to the guide rod 3 and is driven by the motor to move upward, thereby driving the long block 2 to move upward, and the movement of the long block 2 causes the expansion rod 4 hinged at the end thereof to rotate.

[0058] The expansion rod 4 is a steel pipe, the expansion rod 4 is divided into two sections and is hingedly connected between the two sections, and the hinge point can rotate freely. The extension block 12 of the central cylinder 1 is wound with a coil 6 to form an electromagnet, and the part of the long block 2 extending out of the central cylinder 1 is also wound with a coil 6 to form an electromagnet. When the coil 6 is electrified, the extension block 12 and the long block 2 generate magnetism, and the two ends of the expansion rod 4 are firmly adsorbed on the extension block 12 and the long block 2 respectively.

[0059] The support rod 8 is a reinforcing steel bar, a plurality of support rods 8 are arranged in an annular array, the support rod 8 is provided with a hinge 9 close to the inner side of the annular array, and the two sections of the expansion rod 4 are hingedly connected to the hinge 9.

[0060] The isolation layer 7 is a bendable nylon cloth, which is rectangular, and is arranged outside all the support rods 8, and the support rods 8 are fixed with the isolation layer 7 through steel wires. When the annular structure formed by the array of the support rods 8 is expanded (in the state of being expanded), the isolation layer 7 can be completely supported. When the annular structure formed by the array of the support rods 8 is contracted (in the state of not being expanded), as shown in the figure, the isolation layer 7 is folded into a petal shape, and when the support rods 8 are completely expanded, the isolation layer 7 is tightly stretched into a dodecagon. Figure 1

[0061] In use, the coil 6 is powered to form an electromagnet, the two ends of the expansion rod 4 are connected with the extension block 12 and the long block 2 respectively, and then the guide rod 3 is pulled upward by the motor through the steel cable, the long block 2 is pulled upward by the guide rod 3, and in the process of the upward movement of the long block 2, the expansion rod 4 is synchronously lifted by the magnetic adsorption of the long block 2, so that the distance between the steel pipes of the two expansion rods 4 gradually decreases, the expansion rod 4 is bent at the hinge 9, and the support rod 8 is pushed out, and in the process of the outward movement of the support rod 8, the isolation layer 7 connected with the support rod 8 is gradually stretched to form a pouring space.

[0062] When the isolation layer 7 reaches the target position, the power supply of the coil 6 is turned off to stop the work of the electromagnet, and the magnetic property of the extension block 12 and the extended part of the long block 2 disappears, and the electromagnetic connection with the expansion rod 4 is disconnected. Then the guide rod 3 is further pulled upward to take out the central cylinder 1, and the expanded isolation layer 7 remains in the karst cave.

[0063] The scheme is that before the construction of the cast-in-place pile, the device for controlling the expansion range of the flowable soil is placed in the underground karst cave area, and then the electromagnet and the motor are used to work, so that the isolation layer 7 is expanded to form a structure for protecting the expansion range of the flowable soil. Then in the construction process, the flowable soil can be strictly controlled to be accumulated in the designed range, the material is effectively used, unnecessary waste is avoided, the construction efficiency and the pile quality are greatly improved, and a solid foundation is laid for the safety and stability of the subsequent engineering. The scheme can effectively solve the problem of slurry leakage in the construction process of the cast-in-place pile, the flowable soil of the cast-in-place pile is limited by the isolation layer, the protection of the flowable soil on the cast-in-place pile is better when the cast-in-place pile is poured, the pile side friction of the karst cave section is significantly improved, and the construction quality is ensured.

[0064] The above embodiments only describe the basic principles, main features and / or advantages of the utility model, and those skilled in the art should know that the utility model is not limited to the above embodiments, the above embodiments and the description of the inventive content part only describe the principles or specific cases of the utility model, and the utility model has various changes and improvements without departing from the essence of the innovative idea of the utility model, and these changes and improvements all fall within the scope of the utility model.​

Claims

1. An apparatus for controlling the spread of fluidized soil, comprising: It comprises a central cylinder (1), a movable block, a traction mechanism, an expansion rod (4), a supporting rod (8) and an isolation layer (7). The central cylinder (1) is provided with a guide groove (11) which penetrates the top of the central cylinder (1) along the axial direction of the central cylinder (1). The top side of the outer wall of the central cylinder (1) is fixedly provided with not less than three extension blocks (12); the sidewall of the central cylinder (1) directly below the extension blocks (12) is provided with a side groove (5) which penetrates into the inside of the central cylinder (1), and the side groove (5) is in communication with the guide groove (11). The movable block is arranged in the central cylinder (1), and comprises a guide rod (3) and a long block (2); the number of the long blocks (2) is the same as that of the extension blocks (12); the guide rod (3) is arranged in the guide groove (11) and can move up and down along the axial direction of the central cylinder (1). The long blocks (2) are arranged in the side grooves (5) respectively, and all the long blocks (2) are connected into one body at the central cylinder (1); the long blocks (2) extend out of the central cylinder (1) at the end after penetrating through the side grooves (5). The traction mechanism is connected with the guide rod (3). The expansion rod (4) is divided into two sections, and the two sections of the expansion rod (4) are movably connected; the movable point can rotate freely; one end of the expansion rod (4) is rotatably connected with the extension block (12), and the other end of the expansion rod (4) is rotatably connected with the long block (2). The supporting rod (8) is connected with the movable part of the two sections of the expansion rod (4). The isolation layer (7) is fixedly connected with the supporting rod (8), and the isolation layer (7) is arranged outside all the supporting rods (8).

2. The apparatus of claim 1, wherein, Coils (6) are wound outside the extension blocks (12) and the long blocks (2); the extension blocks (12), the long blocks (2) and the expansion rod (4) are all made of magnetic material.

3. The apparatus of claim 2, wherein: The extension blocks (12), the long blocks (2) and the expansion rod (4) are made of one of silicon steel and nickel-iron alloy.

4. The device for controlling the extension of the area covered by fluidized soil according to any one of claims 1 to 3, characterized in that, The expansion rod (4) and the supporting rod (8) are connected by hooks or hinging.

5. The device for controlling the extension of the flowable soil according to any one of claims 1 to 3, characterized in that, The isolation layer (7) is made of one of nylon cloth, polyester fiber cloth and polyester fabric.

6. The device for controlling the extension of the flowable soil according to any one of claims 1 to 3, characterized in that, The number of the extension blocks (12) is 12.

7. The device for controlling the extension of the flowable earth according to any one of claims 1 to 3, characterized in that, The traction mechanism is a motor and a steel cable; the steel cable is connected with the guide rod (3); and the motor is used to drive the steel cable.

8. The device for controlling the extension of the flowable soil according to any one of claims 1 to 3, characterized in that, The supporting rod (8) is made of metal material.

9. The device for controlling the extension of the flowable earth according to any one of claims 1 to 3, characterized in that, The supporting rod (8) is fixedly connected with the isolation layer (7).

10. The apparatus of claim 9, wherein: The supporting rod (8) and the isolation layer (7) are fixedly connected by glue or steel wire.

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