Pile body surface anti-drag material pasting equipment and construction method thereof
By installing the pile surface resistance reduction material covering equipment under the base plate of the static pressure equipment, the substrate is covered with resistance reduction material, which solves the problems of reduced bearing capacity and excessive settlement caused by negative friction during construction, and improves the The bearing capacity of the pile and the stability of the structure.
Patent Information
- Application Number
- CN202411770525.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-02-21
AI Technical Summary
When building pile foundations in soft soil or special soil strata, the lower displacement of the soil around the pile is greater than the lower displacement of the pile itself, resulting in negative friction, increasing the load on the pile, reducing the bearing capacity, and may lead to building tilt or Cracking.
A pile surface resistance reduction material coating equipment is designed, and the base material is coated with resistance reduction material during pile pressing. The equipment includes upper and lower covering structures, which can realize single-layer, multi-layer, and multiple material forms of coating to meet the needs of different construction plans.
By reducing the friction between the pile body and the soil, the bearing capacity and stability of the piles are improved, the settlement amount is reduced, the risk of building inclination and cracking is reduced, and the use function and safety performance of the engineering structure are improved.
Smart Images
Figure CN119491487A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of coiled material coating equipment, and in particular to a pile surface drag reduction material coating equipment and a construction method thereof. Background Art
[0002] Pile foundations are widely used in the development of modern civil engineering because of their large vertical stiffness and bearing capacity, small settlement and ability to withstand certain horizontal loads. However, when constructing pile foundations in soft soil or special soil layers (such as deep fill layers), due to the self-weight consolidation of the soil around the pile body, collapsing or lowering of the groundwater level, surface overload and other reasons, the downward displacement of the soil around the pile is often greater than the downward displacement of the pile itself, so that the friction force acting on the pile body is downward, becoming a downward pull load acting on the side of the pile, that is, the so-called negative friction. The existence of negative friction increases the load on the pile, reduces the bearing capacity of the compressed pile, and may cause the building to tilt and crack due to excessive settlement, directly affecting the use function and safety performance of the engineering structure. Therefore, reducing the negative friction of the pile body has become a key issue of concern in the engineering community.
[0003] At present, the commonly used methods for eliminating negative friction resistance are mainly divided into two categories: one is to control the source of negative friction resistance, that is, through foundation treatment methods (strong compaction method, pre-compression consolidation, etc.), eliminate the harmfulness of the soil body that is prone to negative friction. This method has a long construction period and is generally ineffective for thick soil layers; the second is to isolate the pile body from the soil body around the pile. This type of method is more commonly used, including coating the surface of the pile body with drag reduction materials, installing unloading sleeves, lowering protective casings, and driving isolation piles. Among them, the method of coating the surface of the pile body with drag reduction materials is more reliable, but the construction equipment corresponding to this construction method has not been found. Based on this, the present invention proposes a pile body surface drag reduction material coating equipment and a construction method thereof. Summary of the invention
[0004] In order to solve the shortcomings of the prior art, the present invention proposes a drag reduction material coating device on the pile surface and a construction method thereof, which realizes coating the drag reduction material on the substrate during the pile pressing process by installing the drag reduction material coating device under the bottom plate of the static pressure device. By changing the structural form of the drag reduction material coating device, single-layer, multi-layer, and multi-material coating can be achieved to meet the needs of different construction plans for drag reduction materials on site.
[0005] The present invention adopts the following technical solution: A pile surface drag reduction material coating device comprises an upper coating structure and a lower coating structure, wherein the upper coating structure comprises an upper cover plate, an intermediate cover plate, a vertical connecting rod, a coil fixing frame, an arc conversion rod, and a compression shoe; the upper cover plate and the intermediate cover plate are connected by a vertical connecting rod to form a main frame structure, the upper cover plate is connected to a static press bottom plate by bolts or welding, the coil fixing frame is connected to the lower side of the upper cover plate by bolts or welding, the compression shoe is fixed to the upper side of the intermediate cover plate by bolts, the arc conversion rod is connected to the compression shoe by welding, and substrates of different diameters are passed through an empty hole in the middle of the compression shoe by moving the position of the compression shoe; The lower covering structure includes a lower cover plate, a vertical connecting rod, a motor, a gear turntable, and a coil support; the middle cover plate and the lower cover plate are connected by a vertical connecting rod to form a main frame structure, the gear turntable is inside the main frame structure, the gear turntable includes a fixed ring and a rotating ring, wherein the fixed ring is fixed on the upper side of the lower cover plate, the rotating ring is meshed with the transmission gear on the motor, and the motor is fixed on the upper side of the lower cover plate.
[0006] Preferably, the coil fixing frame is located higher than the curvature conversion rod.
[0007] There are 3-5 compression pads, and all the compression pads together form an annular structure. The position of the compression pads is adjusted according to the diameter of the substrate on which the drag reduction material needs to be applied, thereby adjusting the diameter of the empty hole in the annular structure.
[0008] Preferably, the drag reduction material covering equipment can realize the following combinations according to the needs of covering: an upper covering structure; a lower covering structure; two upper covering structures; two lower covering structures; an upper covering structure and a lower covering structure, with the upper covering structure on the top and the lower covering structure on the bottom; an upper covering structure and a lower covering structure, with the upper covering structure on the bottom and the lower covering structure on the top.
[0009] Preferably, a spraying structure is provided between the upper covering structure and the lower covering structure, and the spraying structure can spray liquid or emulsion materials.
[0010] A construction method of a pile surface drag reduction material coating device, using a pile surface drag reduction material coating device for construction, the specific construction steps are as follows: Step 1: Test equipment Select the appropriate coil form and coil coating form according to the substrate and design requirements, select the structural form of the drag reduction material coating equipment according to the coil, and inspect and test the operation of the equipment; Step 2: Drag reduction material coating equipment connection According to the clearance height from the bottom plate of the static press to the construction work surface, connect the upper cover plate in the drag reduction material coating equipment to the bottom plate of the static press by bolts or welding to ensure that the drag reduction material coating equipment is firmly connected to the static press, and the central axis of the static press pile structure coincides with the central axis of the drag reduction material coating equipment; Step 3: Drag reduction material coating The specific method of using the upper coating structure is as follows: the coil is installed on the coil fixing frame, the coil rotates around the coil fixing frame, the coil fixing frame is located higher than the curvature conversion rod, the coil is pulled out from the coil fixing frame, and passes through the curvature conversion rod to become a single-layer membrane structure with the same curvature as the substrate, and then is pressed on the surface of the substrate through the compression shoe. As the static pressure equipment gradually presses the substrate downward, the drag reduction material is gradually released from the coil fixing frame and coated on the surface of the substrate; The specific method of using the lower coating structure is as follows: the coil is mounted on the coil support, the coil rotates around the central axis of the coil support, the coil support is fixed on the gear turntable, the gear turntable is driven by the gear on the motor, and the coil is fixed on the surface of the substrate. As the static pressure device gradually presses the substrate downward, the drag reduction material is gradually released from the coil support and wrapped and coated on the surface of the substrate; the speed of the gear turntable is adjusted according to the speed at which the substrate is pressed downward; Select the structural form of the equipment according to the design requirements, and apply the coiled form of the drag reduction material to the substrate according to the use methods of the upper covering structure and the lower covering structure; Step 4: Construction completed As the substrate is gradually pressed into the set position, the drag reduction material is coated on the surface of the substrate. The drag reduction material roll is replaced in time according to the construction depth until the coating to the designed depth is completed.
[0011] Preferably, the spraying structure is used in combination with the upper covering structure / lower covering structure. Depending on the structural form, the spraying structure is arranged on the upper part / lower part of the upper covering structure / lower covering structure.
[0012] The beneficial technical effects achieved by adopting the above technical solution are: By installing the drag reduction material coating equipment under the bottom plate of the static pressure equipment, the base material can be coated with the drag reduction material during the pile pressing process. By changing the structural form of the drag reduction material coating equipment, single-layer, multi-layer, and multi-material coating can be achieved to meet the needs of different construction plans for drag reduction materials on site. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The present invention is a structural diagram of a pile surface drag-reducing material coating device and a coating device in a construction method thereof.
[0014] Among them, 1-upper cover plate, 2-middle cover plate, 3-vertical connecting rod, 4-roll material fixing frame, 5-arc conversion rod, 6-pressing shoe, 7-lower cover plate, 8-motor, 9-gear turntable, 10-roll material support. DETAILED DESCRIPTION Embodiment 1:
[0015] Combined with Figure 1 The specific implementation mode of the present invention is further described as follows: A pile surface drag reduction material coating device comprises an upper coating structure and a lower coating structure, wherein the upper coating structure comprises an upper cover plate 1, an intermediate cover plate 2, a vertical connecting rod 3, a coil fixing frame 4, an arc conversion rod 5, and a pressing and holding tile 6; the upper cover plate 1 and the intermediate cover plate 2 are connected by the vertical connecting rod 3 to form a main frame structure, the upper cover plate 1 is connected to the static press bottom plate by bolts or welding, the coil fixing frame 4 is connected to the lower side of the upper cover plate 1 by bolts or welding, the pressing and holding tile 6 is fixed to the upper side of the intermediate cover plate 2 by bolts, the arc conversion rod 5 is connected to the pressing and holding tile 6 by welding, and the position of the pressing and holding tile 6 is moved to realize that substrates of different diameters pass through the empty hole in the middle of the pressing and holding tile 6; The lower covering structure includes a lower cover plate 7, a vertical connecting rod 3, a motor 8, a gear turntable 9, and a coil support 10; the middle cover plate 2 and the lower cover plate 7 are connected by the vertical connecting rod 3 to form a main frame structure, the gear turntable 9 is inside the main frame structure, the gear turntable 9 includes a fixed ring and a rotating ring, wherein the fixed ring is fixed on the upper side of the lower cover plate 7, the rotating ring is meshed with the transmission gear on the motor 8, and the motor 8 is fixed on the upper side of the lower cover plate 7.
[0016] Preferably, the coil fixing frame 4 is positioned higher than the curvature conversion rod 5. The coil fixing frame 4 is used to fix the drag reduction material coil. The drag reduction material is rolled into a coil through a fixed tube, similar to the structure of household plastic wrap. The drag reduction material in coil form is fixed on the coil fixing frame 4. As the single layer of the drag reduction material is pulled out, the drag reduction material in coil form rotates around the coil fixing frame 4.
[0017] There are 3-5 compression pads 6, and all the compression pads 6 together form an annular structure. The position of the compression pads 6 is adjusted according to the diameter of the substrate to be coated with the drag reduction material, and then the diameter of the hole in the annular structure is adjusted. In principle, the number of compression pads 6 increases as the diameter of the substrate increases. However, if the diameter of the substrate is too small, it is difficult for the straight coil to be curved, so the number of pads will be increased to reduce the difficulty; the compression pads 6 adjust the compression state according to the diameter of the substrate to be coated with the drag reduction material.
[0018] Preferably, the drag reduction material covering equipment can realize the following combinations according to the needs of covering: an upper covering structure; a lower covering structure; two upper covering structures; two lower covering structures; an upper covering structure and a lower covering structure, and the upper covering structure is on the top and the lower covering structure is on the bottom; an upper covering structure and a lower covering structure, and the upper covering structure is on the bottom and the lower covering structure is on the top. Depending on the different drag reduction materials and the different design schemes, the selected covering method is also different. It is possible to construct a single layer of drag reduction material, or it is also possible to construct a double layer or multiple layers of drag reduction material. It is also possible that two layers of drag reduction material use the same covering method or two methods, so the structure of the equipment changes accordingly. However, the general structure of each layer construction remains unchanged, only the selection and combination between the upper covering structure and the lower covering structure.
[0019] Preferably, a spraying structure is provided between the upper covering structure and the lower covering structure, and the spraying structure can spray liquid or emulsion materials.
[0020] A construction method of a pile surface drag reduction material coating device, using a drag reduction material coating device for construction, the specific construction steps are as follows: Step 1: Test equipment Select the appropriate coil form and coil coating form according to the substrate and design requirements, select the structural form of the drag reduction material coating equipment according to the coil, and inspect and test the operation of the equipment; Step 2: Drag reduction material coating equipment connection According to the clearance height from the bottom plate of the static press to the construction work surface, the upper cover plate 1 in the drag reduction material pasting equipment is connected to the bottom plate of the static press by bolts or welding to ensure that the drag reduction material pasting equipment is firmly connected to the static press, and the central axis of the static press pile structure coincides with the central axis of the drag reduction material pasting equipment; Step 3: Drag reduction material coating The specific method of using the upper coating structure is as follows: the coil is installed on the coil fixing frame 4, the coil rotates around the coil fixing frame 4, the coil fixing frame 4 is located higher than the curvature conversion rod 5, the coil is pulled out from the coil fixing frame 4, and passes through the curvature conversion rod 5 to become a single-layer membrane structure with the same curvature as the substrate, and then is pressed on the surface of the substrate through the pressing shoe 6. As the static pressure device gradually presses the substrate downward, the drag reduction material is gradually released from the coil fixing frame 4 and coated on the surface of the substrate; The specific method of using the lower coating structure is as follows: the coil is mounted on the coil support 10, the coil rotates around the central axis of the coil support 10, the coil support 10 is fixed on the gear turntable 9, the gear turntable 9 is driven by the gear on the motor 8, and the coil is fixed on the surface of the substrate. As the static pressure device gradually presses the substrate downward, the drag reduction material is gradually released from the coil support 10 and wound and coated on the surface of the substrate; the rotation speed of the gear turntable 9 is adjusted according to the speed at which the substrate is pressed downward; Select the structural form of the equipment according to the design requirements, and apply the coiled form of the drag reduction material to the substrate according to the use methods of the upper covering structure and the lower covering structure; Step 4: Construction completed As the substrate is gradually pressed into the set position, the drag reduction material is coated on the surface of the substrate. The drag reduction material roll is replaced in time according to the construction depth until the coating to the designed depth is completed.
[0021] Preferably, the spraying structure is used in combination with the upper covering structure / lower covering structure. Depending on the structural form, the spraying structure is arranged on the upper part / lower part of the upper covering structure / lower covering structure. Embodiment 2:
[0022] Combined with Figure 1 The specific implementation method of the present invention is further described as follows: when the substrate is a prefabricated pipe pile, the drag reduction material is a single-layer plastic film, and liquid lubricating oil is sprayed between the drag reduction material and the substrate, the specific construction method is as follows: Step 1: Test equipment Select the structural form of the drag reduction material coating equipment according to the coiled material. In this case, the structure includes a lower coating structure and a spraying structure. The lower coating structure is connected to the static press by welding or bolts, and the operation of the equipment is inspected and tested. Step 2: Drag reduction material coating equipment connection According to the clearance height from the bottom plate of the static press to the construction work surface, ensure that the drag reduction material coating equipment is firmly connected to the static press, and that the central axis of the static press pile structure coincides with the central axis of the drag reduction material coating equipment; Step 3: Drag reduction material coating The specific method of using the lower coating structure is as follows: the coil is mounted on the coil support 10, the coil rotates around the central axis of the coil support 10, the coil support 10 is fixed on the gear turntable 9, the gear turntable 9 is driven by the gear on the motor 8, and the coil is fixed on the surface of the substrate. As the static pressure device gradually presses the substrate downward, the drag reduction material is gradually released from the coil support 10 and wound and coated on the surface of the substrate; the rotation speed of the gear turntable 9 is adjusted according to the speed at which the substrate is pressed downward; The spraying structure is arranged on the upper part of the lower covering structure. The spraying structure is a ring structure composed of 4-8 mist nozzles. The spraying structure is connected to the vertical connecting rod 3, that is, liquid lubricating oil is first sprayed on the surface of the substrate, and then the drag reduction material is wrapped around the surface of the substrate through the lower covering structure; Step 4: Construction completed As the substrate is gradually pressed into the set position, the drag reduction material is coated on the surface of the substrate. The drag reduction material roll is replaced in time according to the construction depth until the coating to the designed depth is completed.
[0023] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "center", "up", "down", "front", "back", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0024] In the description of the embodiments of the present invention, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" is a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.
[0025] In the description of the embodiments of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.
[0026] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.
[0027] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.
Claims
1. A device for coating a pile surface with drag-reducing material, characterized in that: It includes an upper covering structure and a lower covering structure; The upper covering structure includes an upper cover plate, an intermediate cover plate, a vertical connecting rod, a coil fixing frame, an arc conversion rod, and a pressing shoe. The upper cover plate and the intermediate cover plate are connected by a vertical connecting rod to form a main frame structure. The upper cover plate is connected to the bottom plate of the static press by bolts or welding. The coil fixing frame is connected to the lower side of the upper cover plate by bolts or welding. The pressing shoe is fixed to the upper side of the intermediate cover plate by bolts. The arc conversion rod is connected to the pressing shoe by welding. By moving the position of the pressing shoe, substrates of different diameters can pass through the empty hole in the middle of the pressing shoe. The lower covering structure includes a lower cover plate, a vertical connecting rod, a motor, a gear turntable, and a coil support; the middle cover plate and the lower cover plate are connected by a vertical connecting rod to form a main frame structure, the gear turntable is inside the main frame structure, the gear turntable includes a fixed ring and a rotating ring, wherein the fixed ring is fixed on the upper side of the lower cover plate, the rotating ring is meshed with the transmission gear on the motor, and the motor is fixed on the upper side of the lower cover plate.
2. The equipment for coating the pile surface with drag-reducing material according to claim 1, characterized in that: The coil fixing frame is located higher than the arc conversion rod.
3. The equipment for coating pile surface with drag-reducing material according to claim 1, characterized in that: There are 3-5 compression pads, and all the compression pads together form an annular structure. The position of the compression pads is adjusted according to the diameter of the substrate on which the drag reduction material needs to be applied, thereby adjusting the diameter of the empty hole in the annular structure.
4. The equipment for coating pile surface with drag-reducing material according to claim 1, characterized in that: The drag reduction material covering equipment can realize the following combinations according to the needs of covering: an upper covering structure; a lower covering structure; two upper covering structures; two lower covering structures; an upper covering structure and a lower covering structure, with the upper covering structure on the top and the lower covering structure on the bottom; an upper covering structure and a lower covering structure, with the upper covering structure on the bottom and the lower covering structure on the top.
5. The equipment for coating pile surface with drag-reducing material according to claim 1, characterized in that: A spraying structure is arranged between the upper covering structure and the lower covering structure, and the spraying structure can spray liquid or emulsion materials.
6. A construction method for a pile surface drag reduction material coating device, characterized in that: The drag reduction material coating equipment described in claim 1 is used for construction, and the specific construction steps are as follows: Step 1: Test equipment Select the appropriate coil form and coil coating form according to the substrate and design requirements, select the structural form of the drag reduction material coating equipment according to the coil, and inspect and test the operation of the equipment; Step 2: Drag reduction material coating equipment connection According to the clearance height from the bottom plate of the static press to the construction work surface, connect the upper cover plate in the drag reduction material coating equipment to the bottom plate of the static press by bolts or welding to ensure that the drag reduction material coating equipment is firmly connected to the static press, and the central axis of the static press pile structure coincides with the central axis of the drag reduction material coating equipment; Step 3: Drag reduction material coating The specific method of using the upper coating structure is as follows: the coil is installed on the coil fixing frame, the coil rotates around the coil fixing frame, the coil fixing frame is located higher than the curvature conversion rod, the coil is pulled out from the coil fixing frame, and passes through the curvature conversion rod to become a single-layer membrane structure with the same curvature as the substrate, and then is pressed on the surface of the substrate through the compression shoe. As the static pressure equipment gradually presses the substrate downward, the drag reduction material is gradually released from the coil fixing frame and coated on the surface of the substrate; The specific method of using the lower coating structure is as follows: the coil is mounted on the coil support, the coil rotates around the central axis of the coil support, the coil support is fixed on the gear turntable, the gear turntable is driven by the gear on the motor, and the coil is fixed on the surface of the substrate. As the static pressure device gradually presses the substrate downward, the drag reduction material is gradually released from the coil support and wrapped around the surface of the substrate. The speed of the gear turntable is adjusted according to the speed at which the substrate is pressed downward. Select the structural form of the equipment according to the design requirements, and apply the coiled form of the drag reduction material to the substrate according to the use methods of the upper covering structure and the lower covering structure; Step 4: Construction completed As the substrate is gradually pressed into the set position, the drag reduction material is coated on the surface of the substrate. The drag reduction material roll is replaced in time according to the construction depth until the coating to the designed depth is completed.
7. The equipment for coating pile surface with drag-reducing material according to claim 5, characterized in that: The spraying structure is used in combination with the upper covering structure / lower covering structure. According to different structural forms, the spraying structure is arranged on the upper part / lower part of the upper covering structure / lower covering structure.