Solid pile with pre-embedded grouting pipe, solid pile system and construction method
Patent Information
- Application Number
- CN202611063913.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-16
- Publication Date
- 2026-09-15
AI Technical Summary
[0004]本发明的目的在于提供一种预埋注浆管的实心桩、实心桩系统及施工方法，以解决预制实心桩难以设置可靠的注浆管的问题
[0025] This configuration eliminates the need for on-site installation and fixing of the grouting pipes by pre-embedding them into the pile body during the precast solid pile construction. Only sealing elements are required on-site, significantly reducing on-site work and improving construction efficiency. The grouting pipes of adjacent solid pile sections are sealed together using these elements, ensuring reliable connection and preventing leakage at the joint. Furthermore, because the main grouting pipe is pre-embedded in the pile body and constrained by the reinforced concrete, relatively thin-walled pipes can be used instead of traditional high-pressure grouting pipes, effectively saving materials and reducing costs.
Smart Images
Figure CN122751702A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field, and in particular to a solid pile with a pre-embedded grouting pipe, a solid pile system, and a construction method. Background Technology
[0002] In the construction industry, precast piles have advantages such as easy control of pile quality, high bearing capacity, fast construction speed, and relatively small environmental impact. For pile foundations, bearing capacity is the most important performance indicator. Grouting the soil layer near the pile tip of a precast pile helps to reinforce the soil near the pile tip and improve the bearing capacity of the pile foundation.
[0003] For precast hollow piles, the internal cavity can be used to install grouting pipes to inject grout into the soil near the pile tip. However, for precast solid piles, the lack of an internal cavity makes it difficult to install grouting pipes. Therefore, some solutions involve prefabricating grouting channels directly within the precast solid pile to achieve the installation of grouting pipes. However, in this approach, when two sections of precast solid piles are joined, it is often difficult to accurately align their respective prefabricated grouting channels, and even if they are successfully joined, the connection point is prone to grout leakage. Summary of the Invention
[0004] The purpose of this invention is to provide a solid pile with a pre-embedded grouting pipe, a solid pile system, and a construction method to solve the problem that it is difficult to install reliable grouting pipes in precast solid piles.
[0005] To solve the above-mentioned technical problems, the present invention provides a solid pile with a pre-embedded grouting pipe, which includes a pile body and a grouting pipe;
[0006] The grouting pipe is installed through the pile body along the axial direction of the pile body; the grouting pipe includes a main pipe and two sleeves, the pressure resistance of the sleeves is greater than that of the main pipe; the two sleeves are respectively sleeved on both ends of the main pipe and fixedly connected to the main pipe.
[0007] The pile body has recessed cavities at both axial ends. The sleeve includes a pre-embedded section embedded in the pile body and an exposed section exposed in the cavities. There is a gap between the exposed section and the sidewall of the cavities, which is used to accommodate the sealing element.
[0008] When the solid piles of the two pre-embedded grouting pipes are used for axial connection, the sealing element is respectively sleeved on the two adjacent sleeves and respectively embedded in the gap of the solid piles of the two pre-embedded grouting pipes to achieve the connection and sealing of the two sleeves.
[0009] Optionally, when the solid piles of the two pre-embedded grouting pipes are used for axial docking, the bottom surfaces of the two adjacent accommodating cavities are respectively used to squeeze the two ends of the seal in the axial direction.
[0010] Optionally, the sum of the axial depths of two adjacent accommodating cavities is less than the axial length of the seal when it is not compressed.
[0011] Optionally, the exposed section is flush with the end face of the pile body; the axial depth of the accommodating cavity is 10mm~50mm; both the main pipe and the sleeve are steel pipes, the wall thickness of the main pipe is 1.0mm~2.0mm; the wall thickness of the sleeve is not less than 3.0mm; and the grouting pipe is located on the central axis of the pile body.
[0012] Optionally, the exposed section has internal or external threads for threaded connection with an external grouting pipe.
[0013] Optionally, when two solid piles with pre-embedded grouting pipes are used for axially connecting with each other, at least one of the end face of the adjacent pile body, the side wall of the accommodating cavity, the bottom surface of the accommodating cavity, the outer wall of the exposed section, and the end face of the exposed section is used to apply sealant.
[0014] To solve the above-mentioned technical problems, the present invention also provides a solid pile system with pre-embedded grouting pipes, which includes at least two solid piles with pre-embedded grouting pipes as described above, and also includes a sealing element; the at least two solid piles with pre-embedded grouting pipes are connected axially, and the sealing element is used to achieve sealed connection of the grouting pipes of the at least two solid piles with pre-embedded grouting pipes; wherein, the sealing element includes a steel wire braided rubber tube.
[0015] To solve the above-mentioned technical problems, the present invention also provides a construction method for solid piles with pre-embedded grouting pipes, which adopts solid piles with pre-embedded grouting pipes as described above; the construction method for solid piles with pre-embedded grouting pipes includes:
[0016] Drive the solid pile with the pre-embedded grouting pipe described in Section 1 into the ground, until the top of the pile protrudes above the ground;
[0017] A portion of the seal is embedded in the gap located at the top of the pile, and another portion of the seal protrudes above the top of the pile;
[0018] Hoist another section of the solid pile of the pre-embedded grouting pipe to be connected, so that the sleeve of the solid pile of the pre-embedded grouting pipe to be connected is inserted into the sealing member protruding above the top of the pile, and the sealing member is embedded in the gap of the solid pile of the pre-embedded grouting pipe to be connected.
[0019] Continue lowering the solid piles of the pre-embedded grouting pipes to be connected, so that the two sections of the pre-embedded grouting pipes abut against each other and the pile connection is completed.
[0020] Optionally, the construction method of the solid pile with the pre-embedded grouting pipe further includes, before embedding a portion of the sealant into the gap located at the top of the pile:
[0021] At least one of the following is applied: the end face of the pile top, the side wall of the accommodating cavity, the bottom surface of the accommodating cavity, the outer wall of the exposed section, the end face of the exposed section, the end face of the sealing element, the outer wall of the sealing element, and the inner wall of the sealing element.
[0022] Optionally, the construction method for the solid pile with the pre-embedded grouting pipe further includes:
[0023] After driving the solid pile with the pre-embedded grouting pipe in the last section, connect the external grouting pipe to the sleeve at the top of the solid pile with the pre-embedded grouting pipe in the last section.
[0024] In summary, in the solid pile with pre-embedded grouting pipe, the solid pile system, and the construction method provided by this invention, the solid pile with pre-embedded grouting pipe includes a pile body and a grouting pipe; the grouting pipe is axially disposed within the pile body; the grouting pipe includes a main pipe and two sleeves, the pressure resistance of which is greater than that of the main pipe; the two sleeves are respectively fitted onto the axial ends of the main pipe and fixedly connected to it; the axial ends of the pile body each have a recessed accommodating cavity, and the sleeve includes, in the axial direction, a pre-embedded section embedded in the pile body and an exposed section exposed within the accommodating cavity; a gap exists between the exposed section and the sidewall of the accommodating cavity, the gap being used to accommodate a sealing element; when two solid piles with pre-embedded grouting pipes are axially connected, the sealing element is respectively fitted onto the two adjacent sleeves and respectively embedded into the gap between the two solid piles with pre-embedded grouting pipes, thereby achieving a sealing connection between the two sleeves.
[0025] This configuration eliminates the need for on-site installation and fixing of the grouting pipes by pre-embedding them into the pile body during the precast solid pile construction. Only sealing elements are required on-site, significantly reducing on-site work and improving construction efficiency. The grouting pipes of adjacent solid pile sections are sealed together using these elements, ensuring reliable connection and preventing leakage at the joint. Furthermore, because the main grouting pipe is pre-embedded in the pile body and constrained by the reinforced concrete, relatively thin-walled pipes can be used instead of traditional high-pressure grouting pipes, effectively saving materials and reducing costs. Attached Figure Description
[0026] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention.
[0027] Figure 1This is a schematic diagram of a solid pile system with pre-embedded grouting pipes according to an embodiment of the present invention.
[0028] Figure 2 This is a partially enlarged schematic diagram of a solid pile system with pre-embedded grouting pipes according to an embodiment of the present invention.
[0029] Figures 3 to 6 This is a schematic diagram of the construction process of a solid pile with a pre-embedded grouting pipe according to an embodiment of the present invention.
[0030] Figure 7 This is a schematic diagram of a seal with a smooth curved surface according to an embodiment of the present invention.
[0031] Figure 8 This is a schematic diagram of a sealing element with a funnel-shaped inner wall, according to an embodiment of the present invention.
[0032] In the attached diagram: 1-Pile body; 11-Accommodation cavity; 12-Gap; 13-Bottom surface; 2-Grouting pipe; 21-Main pipe; 22-Sleeve; 23-Embedded section; 24-Exposed section; 3-Sealing element; 31-Smooth curved surface; 32-Inner wall; 4-External grouting pipe. Detailed Implementation
[0033] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the embodiments of this invention. Furthermore, the structures shown in the drawings are often part of the actual structures. In particular, different figures may emphasize different aspects and may sometimes use different scales.
[0034] As used in this invention, the singular forms “a,” “an,” “one,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature; “one end” and “the other end,” and “proximal end” and “distal end” generally refer to two corresponding parts, which include not only endpoints. Furthermore, the terms "installed," "connected," and "attached," as used in this invention, and the term "set" on one element from another, should be interpreted broadly. They generally only indicate a connection, coupling, cooperation, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. They should not be construed as indicating or implying a spatial relationship between the two elements, meaning one element can be located inside, outside, above, below, or to one side of another element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Additionally, directional terms such as above, below, up, down, upward, downward, left, and right are used relative to exemplary embodiments as shown in the figures, with upward or upper directions pointing towards the top of the corresponding figure, and downward or lower directions pointing towards the bottom of the corresponding figure.
[0035] The purpose of this invention is to provide a solid pile with a pre-embedded grouting pipe, a solid pile system, and a construction method to solve the problem of difficulty in installing reliable grouting pipes in precast solid piles. The following description refers to the accompanying drawings.
[0036] As described in the background section, some precast solid piles utilize a method of directly prefabricating grouting channels to install grouting pipes. Due to manufacturing and transportation limitations, the length of precast solid piles is limited, typically a few meters. However, the entire pile foundation often needs to be tens of meters deep. This necessitates assembling multiple sections of precast solid piles on the construction site. After one section of precast solid pile is driven, the next section needs to be lifted by a crane and connected to the already driven section. This raises the question of how to ensure reliable connection of the precast grouting channels while simultaneously ensuring a leak-proof seal between the two sections.
[0037] In existing technologies, adjacent precast solid piles are often connected by mechanical connectors or by welding. Mechanical connectors obviously cannot guarantee a reliable, sealed connection of the precast grouting channels. Regarding welding, the inventors found through field research that the welding quality control requirements in construction sites are completely different from those in shipbuilding and other fields. Even welding the outer periphery of precast solid piles can only guarantee a certain connection strength, not a complete seal. This means that while welding adjacent precast solid piles may appear to achieve a seal, it does not actually provide a reliable seal. Especially after welding, the piles need to be driven by static pressure or hammering, which may damage the welds during the driving process, further compromising their seal. Grouting pressure is typically on the order of tens of megapascals; under such pressure, damage at the most unfavorable local point will result in large-area grout leakage, ultimately making it difficult for the grout to be injected into the soil layer near the pile tip.
[0038] Since pile foundation construction is mainly underground, even if grout leakage occurs, it is difficult for operators to directly observe it on the ground. The loss of bearing capacity due to grouting failure is also difficult to intuitively reflect. Therefore, this kind of hidden and uncontrollable grout leakage often poses a hidden danger that the bearing capacity does not meet the design requirements after the building is completed.
[0039] To solve the above technical problems, please refer to Figure 1 and Figure 2 This invention provides a solid pile with a pre-embedded grouting pipe, comprising a pile body 1 and a grouting pipe 2; the grouting pipe 2 is axially disposed within the pile body 1; the grouting pipe 2 includes a main pipe 21 and two sleeves 22, the pressure resistance of the sleeves 22 being greater than that of the main pipe 21; the two sleeves 22 are respectively sleeved at both axial ends of the main pipe 21 and fixedly connected to the main pipe 21; both axial ends of the pile body 1 have recessed cavities 11, and the sleeves 22 axially include a pre-embedded section 23 embedded in the pile body 1 and an exposed section 24 exposed within the cavities 11; a gap 12 exists between the exposed section 24 and the sidewall of the cavities 11, the gap 12 being used to accommodate a sealing element 3; in the solid pile with two pre-embedded grouting pipes, the axial ( Figure 1 and Figure 2 When the two sleeves 22 are connected (in the vertical direction), the sealing element 3 is respectively sleeved on the outside of the two adjacent sleeves 22 and respectively embedded in the gap 12 of the solid piles of the two pre-embedded grouting pipes, so as to achieve the sleeve sealing of the two sleeves 22.
[0040] This configuration eliminates the need for on-site installation and fixing of the grouting pipe 2 by pre-embedding it into the pile body 1 during the precast solid pile construction. Only sealing elements 3 are required on-site, reducing on-site work and significantly improving construction efficiency. The grouting pipes 2 of adjacent solid pile sections are sealed and connected reliably via the sealing elements 3, preventing leakage at the connection point. Furthermore, since the main body 21 of the grouting pipe 2 is pre-embedded in the pile body 1 and constrained by the reinforced concrete of the pile body 1, relatively thin-walled pipes can be used instead of traditional high-pressure grouting pipes, effectively saving materials and reducing costs.
[0041] It should be noted that the grouting pipe 2, which is installed along the axial direction of the pile body 1, means that the grouting pipe 2 is buried approximately along the axial direction of the pile body 1. It does not restrict the grouting pipe 2 to be a straight line or completely parallel to the axial direction of the pile body 1. In some embodiments, the grouting pipe 2 may also extend or bend at a slight angle to the axial direction of the pile body 1. For example, the grouting pipe 2 may be pre-embedded in the pile body 1 in a spiral coiled form, and its overall extension trend is still pre-embedded along the axial direction of the pile body 1, and should still be considered as being installed along the axial direction of the pile body 1. Preferably, the grouting pipe 2 is a straight pipe located on the central axis of the pile body 1. The grouting pipe 2 on the axis facilitates the connection of the upper and lower sections of solid piles. As long as the centers of the upper and lower sections of solid piles are aligned, the grouting pipes 2 of both sections can be aligned and connected. Preferably, the solid pile for pre-embedding the grouting pipe in this embodiment can be a square pile, that is, its cross-section can be rectangular or square.
[0042] Optionally, when two solid piles with pre-embedded grouting pipes are axially connected, the bottom surfaces 13 of the two adjacent accommodating cavities 11 are respectively used to compress the two ends of the sealing element 3 in the axial direction. The sealing element 3 is a component with a certain elastic deformation capacity. When compressed, it can form a seal on the surrounding compression surface based on its own elastic deformation. The sealing element 3 is preferably a tubular component. In the application scenario of this embodiment, when the upper and lower solid piles are connected, although the grouting pipes 2 are axially connected, for the convenience of construction, the ends of the grouting pipes 2 are only close to or in contact with each other, and cannot form a sealed connection. The connection of the two grouting pipes 2 will form a radial leak. In conventional logic, in order to overcome the radial leak, the sealing element 3 should be sealed by radial compression. However, during the construction of the upper and lower solid piles, it is difficult to form radial pressure to compress the sealing element 3 without additional special treatment.
[0043] The inventors discovered through research that while it is difficult to generate radial pressure between the upper and lower sections of solid piles during construction, axial pressure can be generated relatively easily. However, considering the reliable connection of the two solid pile sections, the end faces of the two sections need to be in contact, so a sealing ring cannot be directly placed between them. Based on this, this embodiment provides a receiving cavity 11 at the end of the pile body 1 to house the sealing element 3. The sum of the axial depths of the receiving cavities 11 of the two solid pile sections is slightly less than the axial length of the sealing element 3 when it is not compressed. Therefore, when the two solid pile sections are connected, the axial ends of the sealing element 3 can be easily squeezed, thereby indirectly forming a seal on the connection of the two grouting pipes 2. Furthermore, this sealing method is also adaptable to the construction site. The operation can be completed simply by aligning the upper and lower solid pile sections and letting the upper solid pile fall, without the need for additional sealing or locking operations.
[0044] As mentioned earlier, the grouting pressure is generally on the order of tens of megapascals. For such pressure, the wall thickness of traditional high-pressure grouting pipes (such as steel pipes) generally needs to be no less than 3 mm. However, in this embodiment, the main body 21 of the grouting pipe 2 is pre-embedded in the pile body 1. The main material constituting the pile body 1 is reinforced concrete. Therefore, after the solid pile is prefabricated, the main body 21 will be constrained by the reinforced concrete of the pile body 1. Thus, a thinner-walled pipe can be used compared to traditional high-pressure grouting pipes, thereby saving materials and reducing costs. Preferably, the main body 21 is a steel pipe. In one example, the main body 21 is a DN20 thin-walled steel pipe with a wall thickness of 1.0 mm to 2.0 mm, such as 1.2 mm or 1.5 mm.
[0045] However, the inventors discovered that the arrangement of the accommodating cavity 11 effectively removes the constraint on the end of the grouting pipe 2. Therefore, this embodiment uses a main pipe 21 with relatively low pressure resistance and sleeves 22 with relatively high pressure resistance at both ends of the main pipe 21. The sleeves 22 can fully withstand the grouting pressure without external reinforced concrete support. The main pipe 21, except for the portion overlapped by the sleeves 22, is completely constrained within the reinforced concrete of the pile body 1. This configuration allows the main pipe 21 to use a thin-walled pipe, while thicker sleeves 22 are used at the ends of the pile body 1 corresponding to the accommodating cavity 11 to cope with the grouting pressure. Optionally, the sleeves 22 can also be steel pipes with a wall thickness of not less than 3.0 mm. The sleeves 22 and the main pipe 21 are preferably welded together, but can also be joined by cold pressing or other methods.
[0046] Optionally, the exposed section 24 is flush with the end face of the pile body 1; the axial depth of the accommodating cavity 11 is 10mm~50mm, preferably 20mm. To improve protection of the weakest point (the area at the end of the main pipe 21 not constrained by the pile body 1), the sleeve 22 includes a section extending into the pile body 1, which is called the pre-embedded section 23. The axial length of the pre-embedded section 23 is preferably not less than 10mm to avoid damage to its connection with the main pipe 21 under pressure. On the other hand, the end of the exposed section 24 away from the pre-embedded section 23 is preferably close to the end face of the pile body 1, more preferably flush, so that when the two solid piles are joined, the end faces of their exposed sections 24 can basically abut against each other, reducing the gap between them and reducing the difficulty of sealing with the sealing element 3. In other embodiments, the exposed section 24 is not limited to being flush with the end face of the pile body 1. For example, at both ends of each solid pile section, the exposed section 24 can be recessed and protruded by the same distance in the same direction. For example, one end is recessed by a certain distance from the end face, and the other end protrudes by the same distance from the end face. When the two solid pile sections are joined together, the exposed section 24 can still form a basic mutual abutment effect through the concave-convex fit. This embodiment is not limited to this.
[0047] Please refer to Figure 7 In some embodiments, the axial end face of the seal 3 may optionally include a smooth curved surface 31 to facilitate fitting onto the exposed section 24. Optionally, to match the smooth end face of the seal 3, the bottom surface 13 of the receiving cavity 11 may also be adapted to form an arc-shaped groove. Please refer to... Figure 8 In other embodiments, the inner wall 32 of the seal 3 is in the shape of an outwardly expanding horn, which can also provide some guidance when it is fitted onto the exposed section 24.
[0048] Optionally, the exposed section 24 has internal or external threads for threaded connection with the external grouting pipe 4. Please refer to... Figure 1 and Figure 2 After the last solid pile section is driven into the ground, an external grouting pipe 4 can be connected to the sleeve 22 at the top of the last solid pile section. The internal or external threads on the exposed section 24 facilitate quick connection with the external grouting pipe 4. To improve versatility, each exposed section 24 can be threaded, so that the order of solid pile installation does not need to be specifically selected during construction.
[0049] Preferably, when two solid piles with pre-embedded grouting pipes are axially connected, at least one of the end face of the adjacent pile body 1, the side wall of the receiving cavity 11, the bottom surface 13 of the receiving cavity 11, the outer wall of the exposed section 24, and the end face of the exposed section 24 is coated with sealant. In some embodiments, applying sealant can be used to further enhance the sealing effect of the sealing element 3 on the grouting pipe 2. The sealant used here can be epoxy resin, which has high strength and pressure resistance.
[0050] This embodiment also provides a solid pile system with pre-embedded grouting pipes, which includes at least two solid piles with pre-embedded grouting pipes as described above, and also includes a sealing element 3; the at least two solid piles with pre-embedded grouting pipes are connected axially, and the sealing element 3 is used to achieve the sealed connection of the grouting pipes 2 of the at least two solid piles with pre-embedded grouting pipes; wherein, the sealing element 3 includes a steel wire braided rubber tube.
[0051] Please refer to Figures 3 to 6 This embodiment also provides a construction method for solid piles with pre-embedded grouting pipes, which uses solid piles with pre-embedded grouting pipes as described above; the construction method for solid piles with pre-embedded grouting pipes includes:
[0052] Step S1: Drive the solid pile of the pre-embedded grouting pipe described in section S1 into the ground, until the top of the pile protrudes above the ground. Figure 3 As shown.
[0053] Step S2: Embed a portion of the seal 3 into the gap 12 located at the top of the pile, with the other portion of the seal 3 protruding above the top of the pile, as shown. Figure 4 As shown.
[0054] Step S3: Hoist another section of the solid pile containing the pre-embedded grouting pipe to be connected, inserting the sleeve 22 of the solid pile containing the pre-embedded grouting pipe to be connected into the sealing member 3 protruding above the top of the pile, and embedding the sealing member 3 into the gap 12 of the solid pile containing the pre-embedded grouting pipe to be connected, as shown. Figure 5 As shown.
[0055] Step S4: Continue lowering the solid piles of the pre-embedded grouting pipes to be connected, so that the two sections of the pre-embedded grouting pipes abut against each other and the pile connection is completed. Figure 6 As shown.
[0056] Step S1 can be done by first sinking a section of solid pile into the soil, with the top protruding about one meter above the ground, to facilitate operation.
[0057] Step S2 is the installation of the seal 3. The operator can fit the seal 3 over the exposed section 24 of the solid pile that was exposed above the ground in step S1. At this time, the seal 3 is equivalent to being embedded in the gap 12 at the top of the pile. Preferably, the bottom end of the seal 3 is fitted to contact the bottom surface 13 of the receiving cavity 11 at the top of the pile. Since the axial length of the seal 3 is much greater than the depth of the receiving cavity 11, the upper part of the seal 3 protrudes above the top of the pile.
[0058] Optionally, before installing the sealing element 3 in step S2, the construction method of the solid pile with the pre-embedded grouting pipe includes: applying sealant to at least one of the following: the end face of the pile top, the side wall of the receiving cavity 11, the bottom surface 13 of the receiving cavity 11, the outer wall of the exposed section 24, the end face of the exposed section 24, the end face of the sealing element 3, the outer wall of the sealing element 3, and the inner wall of the sealing element 3. Preferably, sealant is applied to all the aforementioned locations.
[0059] In step S3, the next solid pile to be connected is hoisted and its lower sleeve 22 is inserted into the seal 3 protruding above the pile top. At this time, the operator can embed the upper end face of the seal 3 into the gap 12 of the solid pile above, for example by operating with a thin rod, to ensure that the subsequent pressing of the solid pile will not squeeze the seal 3 out of the gap 12.
[0060] Step S4 simply involves lowering the upper solid pile to abut against the lower solid pile, and then completing the pile splicing (such as welding or mechanical clamping). The pile driving operation can then continue, driving the upper solid pile into the soil. If further pile splicing is required, steps S1 to S4 are repeated until the last solid pile is driven.
[0061] The construction method for the solid pile with the pre-embedded grouting pipe further includes:
[0062] Step S5: After driving the solid pile with the pre-embedded grouting pipe described in the last section, connect the external grouting pipe 4 to the sleeve 22 at the top of the solid pile with the pre-embedded grouting pipe described in the last section. For example, it can be connected by threads, and then grouting operation can be carried out. For specific operation, please refer to the existing technology, which will not be described in detail here.
[0063] In summary, in the solid pile with pre-embedded grouting pipe, the solid pile system, and the construction method provided by this invention, the solid pile with pre-embedded grouting pipe includes a pile body and a grouting pipe; the grouting pipe is axially disposed within the pile body; the grouting pipe includes a main pipe and two sleeves, the pressure resistance of which is greater than that of the main pipe; the two sleeves are respectively fitted onto the axial ends of the main pipe and fixedly connected to it; the axial ends of the pile body each have a recessed accommodating cavity, and the sleeve includes, in the axial direction, a pre-embedded section embedded in the pile body and an exposed section exposed within the accommodating cavity; a gap exists between the exposed section and the sidewall of the accommodating cavity, the gap being used to accommodate a sealing element; when two solid piles with pre-embedded grouting pipes are axially connected, the sealing element is respectively fitted onto the two adjacent sleeves and respectively embedded into the gap between the two solid piles with pre-embedded grouting pipes, thereby achieving a sealing connection between the two sleeves. This configuration eliminates the need for on-site installation and fixing of the grouting pipes by pre-embedding them into the pile body during the precast solid pile construction. Only sealing elements are required on-site, significantly reducing on-site work and improving construction efficiency. The grouting pipes of adjacent solid pile sections are sealed together using these elements, ensuring reliable connection and preventing leakage at the joint. Furthermore, because the main grouting pipe is pre-embedded in the pile body and constrained by the reinforced concrete, relatively thin-walled pipes can be used instead of traditional high-pressure grouting pipes, effectively saving materials and reducing costs.
[0064] It should be noted that the above embodiments can be combined with each other. The above description is only a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the present invention.
Claims
1. A solid pile with pre-embedded grouting pipe, characterized in that, Including the pile body and grouting pipes; The grouting pipe is installed through the pile body along the axial direction of the pile body; the grouting pipe includes a main pipe and two sleeves, the pressure resistance of the sleeves is greater than that of the main pipe; the two sleeves are respectively sleeved on both ends of the main pipe and fixedly connected to the main pipe. The pile body has recessed cavities at both axial ends. The sleeve includes a pre-embedded section embedded in the pile body and an exposed section exposed in the cavities. There is a gap between the exposed section and the sidewall of the cavities, which is used to accommodate the sealing element. When the solid piles of the two pre-embedded grouting pipes are used for axial connection, the sealing element is respectively sleeved on the two adjacent sleeves and respectively embedded in the gap of the solid piles of the two pre-embedded grouting pipes to achieve the connection and sealing of the two sleeves.
2. The pile according to claim 1, wherein When the solid piles of the two pre-embedded grouting pipes are used for axial docking, the bottom surfaces of the two adjacent accommodating cavities are respectively used to squeeze the two ends of the seal in the axial direction.
3. The pile according to claim 2, wherein The sum of the axial depths of two adjacent cavities is less than the axial length of the seal when it is not compressed.
4. The pile according to claim 1, wherein The exposed section is flush with the end face of the pile body; the axial depth of the accommodating cavity is 10mm~50mm; both the main pipe and the sleeve are steel pipes, the wall thickness of the main pipe is 1.0mm~2.0mm; the wall thickness of the sleeve is not less than 3.0mm; the grouting pipe is located on the central axis of the pile body.
5. The solid pile with pre-embedded grouting pipe according to claim 1, characterized in that, The exposed section has internal or external threads for connection to an external grouting pipe.
6. The solid pile with pre-embedded grouting pipe according to claim 1, characterized in that, When two solid piles with pre-embedded grouting pipes are used for axial docking, at least one of the end face of the adjacent pile body, the side wall of the accommodating cavity, the bottom surface of the accommodating cavity, the outer wall of the exposed section, and the end face of the exposed section is used to apply sealant.
7. A solid pile system with pre-embedded grouting pipes, characterized in that, The solid pile includes at least two sections of pre-embedded grouting pipes as described in any one of claims 1 to 6, and further includes a sealing element; the at least two sections of the solid pile with pre-embedded grouting pipes are connected axially, and the sealing element enables the sealing and connection of the grouting pipes of the at least two sections of the solid pile with pre-embedded grouting pipes; wherein the sealing element includes a steel wire braided rubber tube.
8. A construction method for solid piles with pre-embedded grouting pipes, characterized in that, Solid piles using pre-embedded grouting pipes according to any one of claims 1 to 6; the construction method of the solid piles using pre-embedded grouting pipes includes: Drive the solid pile with the pre-embedded grouting pipe described in Section 1 into the ground, until the top of the pile protrudes above the ground; A portion of the seal is embedded in the gap located at the top of the pile, and another portion of the seal protrudes above the top of the pile; Hoist another section of the solid pile of the pre-embedded grouting pipe to be connected, so that the sleeve of the solid pile of the pre-embedded grouting pipe to be connected is inserted into the sealing member protruding above the top of the pile, and the sealing member is embedded in the gap of the solid pile of the pre-embedded grouting pipe to be connected. Continue lowering the solid piles of the pre-embedded grouting pipes to be connected, so that the two sections of the pre-embedded grouting pipes abut against each other and the pile connection is completed.
9. The construction method of solid piles with pre-embedded grouting pipes according to claim 8, characterized in that, The construction method for the solid pile with the pre-embedded grouting pipe further includes, prior to embedding a portion of the sealing element into the gap located at the top of the pile: At least one of the following is applied: the end face of the pile top, the side wall of the accommodating cavity, the bottom surface of the accommodating cavity, the outer wall of the exposed section, the end face of the exposed section, the end face of the sealing element, the outer wall of the sealing element, and the inner wall of the sealing element.
10. The construction method of solid piles with pre-embedded grouting pipes according to claim 8, characterized in that, Also includes: After driving the solid pile with the pre-embedded grouting pipe in the last section, connect the external grouting pipe to the sleeve at the top of the solid pile with the pre-embedded grouting pipe in the last section.