Connecting device of steel pipe pile and precast pile cap and connecting method thereof

Abstract

The application belongs to the technical field of building construction, and discloses a connecting device and a connecting method for a steel pipe pile and a prefabricated pile cap. The connecting device for the steel pipe pile and the prefabricated pile cap comprises a steel pipe pile, a prefabricated pile cap and a connecting assembly, the steel pipe pile is connected with the prefabricated pile cap through the connecting assembly; the connecting assembly comprises a connecting piece, a shear-resistant piece and a pull-out-resistant piece, the connecting piece is arranged at the top of the steel pipe pile, the prefabricated pile cap is located at the top of the connecting piece, the connecting piece and the inner hole wall of the steel pipe pile form a pouring space, and the pouring space is filled with concrete; one end of the shear-resistant piece is located in the pouring space, the other end of the shear-resistant piece passes through the connecting piece and is inserted into the prefabricated pile cap; the pull-out-resistant piece passes through the connecting piece and is anchored to the prefabricated pile cap. The connecting device for the steel pipe pile and the prefabricated pile cap can stably connect the steel pipe pile and the prefabricated pile cap, effectively overcomes various disadvantages of cast-in-situ pile caps, reduces the time of wet work on the construction site, and improves the controllability of the construction quality and the applicability in urban projects.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a connection device and method for connecting steel pipe piles and precast foundations. Background Technology

[0002] In pile foundation construction, a reinforced concrete platform, or pile cap, needs to be installed at the top of the pile. As a key force-transferring component of the foundation system, the core function of the pile cap is to evenly transfer the load of the superstructure to the pile foundation and significantly improve the overall stability of the foundation by coordinating the stress state of each individual pile. It is an important component in ensuring the bearing capacity of pile foundation engineering.

[0003] In existing technologies, cast-in-place construction is commonly used for foundation construction. This method is widely used in various engineering scenarios due to its inherent advantages, such as strong structural integrity, simple design, and relatively small required foundation area. However, in urban renewal projects, the drawbacks of cast-in-place foundations are particularly prominent: the wet construction process generates a large amount of solid waste and noise, significantly disrupting the lives of densely populated residents, commercial activities, and public spaces in the surrounding area. Therefore, the use of cast-in-place foundations should be avoided as much as possible in urban renewal projects. Furthermore, cast-in-place foundations also have problems such as long construction cycles and difficulty in precisely controlling the quality of each stage of construction, further reducing their applicability in urban projects.

[0004] Therefore, there is an urgent need for a connection device and method between steel pipe piles and precast pile caps to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a connection device and method for steel pipe piles and precast foundations, which can stably connect steel pipe piles and precast foundations, effectively overcome various drawbacks of cast-in-place foundations, reduce the time of wet work on the construction site, improve the controllability of construction quality and its applicability in urban projects.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On the one hand, a connection device for steel pipe piles and precast pile caps is provided, including steel pipe piles, precast pile caps and connection components, wherein the steel pipe piles are connected to the precast pile caps through the connection components;

[0008] The connection components include:

[0009] The connector is set on the top of the steel pipe pile, and the precast bearing is located on the top of the connector. The connector and the inner wall of the steel pipe pile form a pouring space, and concrete is poured in the pouring space.

[0010] Shear-resistant member, one end of which is located in the casting space, and the other end passes through the connector and is inserted into the precast foundation;

[0011] Pull-out members pass through the connectors and are anchored to the precast foundation.

[0012] Optionally, the inner hole of the steel pipe pile is provided with a partition, which is connected to the shear-resistant member. The partition, the connecting member and the inner wall of the steel pipe pile form a casting space.

[0013] Optionally, the connecting assembly also includes filler material, a first mounting groove is provided on the precast support, the shear member is inserted into the first mounting groove, and filler material is filled between the shear member and the groove wall of the first mounting groove.

[0014] Optionally, the connecting assembly also includes filler material, a second mounting groove is provided on the precast support, the pull-out member passes through the connector and is inserted into the second mounting groove, and filler material is filled between the pull-out member and the groove wall of the second mounting groove.

[0015] Optionally, the connection assembly also includes an installation component, with an anchor embedded in the precast pier, the installation component being threadedly connected to the anchor, and a second installation groove being provided in the installation component.

[0016] Optionally, the connecting assembly also includes a plurality of first reinforcing members disposed within the casting space. The plurality of first reinforcing members are arranged at intervals along the circumference of the shear member. One end of the first reinforcing member is connected to the inner wall of the steel pipe pile, and the other end is connected to the shear member.

[0017] And / or, the connecting assembly further includes a plurality of second reinforcing members disposed on the connecting member, the plurality of second reinforcing members being arranged at intervals along the circumference of the steel pipe pile, and the second reinforcing members being connected to the outer wall of the steel pipe pile.

[0018] Optionally, the connector is provided with a grouting hole that communicates with the pouring space, through which concrete can enter the pouring space;

[0019] And / or, the connector is provided with a connecting hole, the pull-out member passes through the connecting hole and is anchored to the precast bearing, and the cross-sectional diameter of the connecting hole is larger than the cross-sectional diameter of the pull-out member.

[0020] On the other hand, a method for connecting steel pipe piles and precast pile caps is provided, applicable to the aforementioned connection device for steel pipe piles and precast pile caps, comprising the following steps:

[0021] S1. Connect the shear-resistant components and connectors to the steel pipe piles;

[0022] S2. Install the steel pipe piles into the foundation;

[0023] S3. Pour concrete into the pouring space;

[0024] S4. Move the precast foundation above the connector so that the shear member can be inserted into the precast foundation; then, pass the pull-out member through the connector and anchor it to the precast foundation.

[0025] Optionally, the connecting assembly also includes a sealing element, which has a connecting hole.

[0026] Step S3 specifically includes the following steps:

[0027] S31. Pour concrete into the pouring space;

[0028] S32. Seal the connection hole with a sealing component;

[0029] S33. Pour a layer of cement mortar on the top surface of the connector;

[0030] Step S4 specifically includes the following steps:

[0031] S41. Remove the sealing component from the connection hole;

[0032] S42. Move the precast foundation above the connector so that the shear member can be inserted into the precast foundation;

[0033] S43. Pass the pull-out member through the connection hole and the cement mortar layer and anchor it to the precast foundation.

[0034] Optionally, the connecting assembly may also include multiple leveling parts of different thicknesses, one of which can be installed on top of the connecting part;

[0035] The steps following step S2 and before step S3 include:

[0036] Measure the top elevation of the connector and determine whether the measured elevation is equal to the preset elevation;

[0037] If the measured elevation is lower than the preset elevation, select a leveling component based on the difference between the measured elevation and the preset elevation, and install the leveling component onto the top surface of the connector.

[0038] If the measured elevation is higher than the preset elevation, continue to move the steel pipe pile down;

[0039] If the measured elevation is equal to the preset elevation, then proceed directly to step S3.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] This invention provides a connection device and method for connecting steel pipe piles and precast foundations. One end of a shear-resistant member can be firmly connected to the steel pipe pile through concrete within the pouring space, while the other end can be inserted into the precast foundation. The shear-resistant member can effectively bear the shear force between the steel pipe pile and the precast foundation, distributing this shear force to both the steel pipe pile and the precast foundation, thus improving the shear resistance between them and ensuring the reliability of the connection. The connector is positioned between the steel pipe pile and the precast foundation and is securely connected to the precast foundation through a pull-out member, allowing the vertical force between them to be effectively transmitted. Furthermore, under the constraint of the pull-out member, the connector can be firmly connected to the precast foundation, improving the vertical connection strength between the steel pipe pile and the precast foundation, further ensuring the reliability of the connection. Compared with existing technologies, the precast foundation provided by this invention can be constructed in a factory, thereby effectively overcoming the various drawbacks of cast-in-place foundations, reducing the time spent on wet work on the construction site, improving the controllability of construction quality, and helping to improve construction efficiency, reduce construction costs, reduce environmental pollution, improve construction quality, and enhance its applicability in urban projects. Attached Figure Description

[0042] Figure 1 A cross-sectional view of the connection device between the steel pipe pile and the precast pile cap provided by the present invention;

[0043] Figure 2 A cross-sectional view of the completed connection between the steel pipe pile and the precast pile cap provided by the present invention.

[0044] Figure 3 A plan view of the steel pipe piles for the connection device between the steel pipe piles and the precast pile cap provided by the present invention;

[0045] Figure 4 A cross-sectional view of the steel pipe pile, shear-resistant component, and connector of the connection device between the steel pipe pile and the precast pile cap provided by the present invention;

[0046] Figure 5 A cross-sectional view of the precast foundation of the connection device between the steel pipe pile and the precast foundation provided by the present invention.

[0047] Figure 6 A schematic diagram of the steel pipe pile, shear-resistant component, and connector of the connection device between the steel pipe pile and the precast pile cap provided by the present invention;

[0048] Figure 7 Exploded view of the steel pipe pile, shear-resistant component, and connector of the connection device between the steel pipe pile and the precast pile cap provided by the present invention;

[0049] Figure 8 A first flowchart of the connection method between steel pipe piles and precast pile caps provided by the present invention;

[0050] Figure 9 The second flowchart is provided by the present invention for the connection method between steel pipe piles and precast pile caps.

[0051] Figure 10 A schematic diagram illustrating step S2 of the method for connecting steel pipe piles and precast pile caps provided by the present invention.

[0052] Figure 11 This is a schematic diagram illustrating step S4 of the method for connecting steel pipe piles and precast pile caps provided by the present invention.

[0053] In the picture:

[0054] 100. Steel pipe piles; 101. Casting space;

[0055] 200. Precast foundation; 201. First mounting groove; 202. First filling channel; 203. First overflow channel; 204. Second mounting groove;

[0056] 300. Connecting component; 301. Connector; 3011. Grouting hole; 3012. Connecting hole; 3013. Mounting hole; 302. Shear-resistant component; 303. Pull-out component; 304. Separator; 305. Filler; 306. Mounting component; 3061. Filling port; 3062. Overflow port; 307. Anchor; 308. First reinforcing component; 309. Second reinforcing component; 310. Leveling component; 311. Sealing component; 312. Cement mortar layer; 313. Locking nut; 314. Anti-loosening nut; 315. Foam sealant;

[0057] 400. Foundation;

[0058] 500. Vibratory hammer. Detailed Implementation

[0059] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0060] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0063] Example 1

[0064] like Figures 1 to 11 As shown, this embodiment provides a connection device for steel pipe piles and precast pile caps, which can stably connect steel pipe piles 100 and precast pile caps 200, effectively overcoming various drawbacks of cast-in-place pile caps, reducing the time of wet work on the construction site, improving the controllability of construction quality and its applicability in urban projects.

[0065] See Figure 1 The connection device between the steel pipe pile and the precast foundation includes a steel pipe pile 100, a precast foundation 200, and a connecting component 300. The steel pipe pile 100 is connected to the precast foundation 200 through the connecting component 300. The connecting component 300 includes a connector 301, a shear member 302, and a pull-out member 303. The connector 301 is located on top of the steel pipe pile 100, and the precast foundation 200 is located on top of the connector 301. The connector 301 and the inner wall of the steel pipe pile 100 form a pouring space 101, in which concrete is poured. One end of the shear member 302 is located in the pouring space 101, and the other end passes through the connector 301 and is inserted into the precast foundation 200. The pull-out member 303 passes through the connector 301 and is anchored to the precast foundation 200.

[0066] The connection device between the steel pipe pile and the precast pile cap provided in this embodiment has a shear-resistant member 302. One end of the shear-resistant member 302 can be firmly connected to the steel pipe pile 100 through the concrete in the pouring space 101, and the other end can be inserted into the precast pile cap 200. The shear-resistant member 302 can effectively bear the shear force between the steel pipe pile 100 and the precast pile cap 200 and distribute these shear forces to the steel pipe pile 100 and the precast pile cap 200, which helps to improve the shear resistance between the steel pipe pile 100 and the precast pile cap 200 and ensures the reliability of the connection between the steel pipe pile 100 and the precast pile cap 200. A connector 301 is disposed between the steel pipe pile 100 and the precast pile cap 200, and is securely connected to the precast pile cap 200 via a pull-out member 303. This allows the vertical force between the steel pipe pile 100 and the precast pile cap 200 to be effectively transmitted through the connector 301. Furthermore, under the constraint of the pull-out member 303, the connector 301 can be firmly connected to the precast pile cap 200, which helps to improve the vertical connection strength between the steel pipe pile 100 and the precast pile cap 200, further ensuring the reliability of the connection between them. Compared with the prior art, the precast pile cap 200 provided in this embodiment can be constructed in a factory, thereby effectively overcoming various drawbacks of cast-in-place pile caps, reducing the time spent on wet work on the construction site, improving the controllability of construction quality, and contributing to improved construction efficiency, reduced construction costs, reduced environmental pollution, enhanced construction quality, and its applicability in urban projects.

[0067] Specifically, the use of precast foundation 200 not only eliminates time-consuming procedures such as formwork installation, concrete pouring, and curing during cast-in-place foundation construction, but also eliminates the need for on-site welding of the precast foundation 200 to the steel pipe piles 100. This significantly shortens the construction cycle of the precast foundation 200, improves construction efficiency, and reduces construction costs. Furthermore, it significantly reduces solid waste and noise pollution during construction, minimizing environmental impact. Since both the precast foundation 200 and the connecting components 300 can be prefabricated in a factory, their production process is less affected by environmental interference, offering greater controllability and significantly reducing the impact of environmental factors on the production quality of the precast foundation 200, thus improving construction quality.

[0068] In this embodiment, the connector 301 is a flange, which can reduce the thickness of the connector 301 and the length of the pull-out member 303, thus helping to reduce the construction cost of the connection device between the steel pipe pile and the precast foundation.

[0069] For example, the connector 301 is a flange, which is welded to the top surface of the steel pipe pile 100.

[0070] In this embodiment, the pull-out resisting member 303 is made of threaded steel bar. The threads on the threaded steel bar can increase the anchorage force between it and the precast bearing 200, thereby improving the connection strength between the pull-out resisting member 303 and the precast bearing 200.

[0071] In this embodiment, the shear-resistant member 302 is made of H-beam. H-beams have a symmetrical structure; when subjected to shear force, the web of the H-beam, as the main stress-bearing area, can directly resist shear deformation; while the flanges of the H-beam further enhance the overall shear resistance by constraining the lateral deformation of the web.

[0072] In this embodiment, see Figure 2 and Figure 3 The connection device between the steel pipe pile and the precast pile cap includes multiple connecting components 300 and multiple steel pipe piles 100. Each connecting component 300 corresponds to one of the multiple steel pipe piles 100. The steel pipe piles 100 are connected to the precast pile cap 200 through the corresponding connecting components 300, so that the multiple steel pipe piles 100 can be subjected to the force as a whole through the precast pile cap 200, thereby improving the integrity of the pile foundation system.

[0073] For example, see Figure 2 and Figure 3 Each precast pier 200 is connected to four steel pipe piles 100.

[0074] Optionally, see Figure 4 The inner bore of the steel pipe pile 100 is equipped with a separator 304, which is connected to the shear-resistant member 302. The separator 304, the connecting member 301, and the inner wall of the steel pipe pile 100 enclose a pouring space 101. During the pouring process, the separator 304 can divide the inner bore of the steel pipe pile 100 into areas requiring concrete pouring and areas not requiring concrete pouring. It can also be used as a formwork for the concrete, effectively constraining the flow range of the concrete, which helps to improve the pouring quality and reduce the volume of concrete poured, further reducing construction costs.

[0075] For example, see Figure 4 The separator 304 is made of steel plate, and the separator 304 is welded to the lower end of the shear-resistant member 302 and the inner wall of the steel pipe pile 100.

[0076] Optionally, see Figure 1 and Figure 5 The connecting component 300 also includes a filler 305. A first mounting groove 201 is provided on the precast foundation 200. The shear member 302 is inserted into the first mounting groove 201, and the space between the shear member 302 and the groove wall of the first mounting groove 201 is filled with the filler 305. The filler 305 can fill the gap between the shear member 302 and the groove wall of the first mounting groove 201, improving the tightness and integrity of the connection between the shear member 302 and the precast foundation 200, preventing movement between them, and improving the overall load-bearing capacity of the structure. Moreover, the filler 305 can repair structural damage caused by construction defects, material aging, or external forces, further improving the integrity between the shear member 302 and the precast foundation 200.

[0077] In this embodiment, see Figure 1 and Figure 5 The precast support 200 is provided with a first filling channel 202 and a first overflow channel 203. Both the first filling channel 202 and the first overflow channel 203 are connected to the first mounting groove 201. The filler material 305 can enter the first mounting groove 201 through the first filling channel 202. After the groove wall of the first mounting groove 201 and the shear member 302 are filled with the filler material 305, the filler material 305 can overflow through the first overflow channel 203 to prompt the staff to stop filling.

[0078] For example, filler 305 is grout.

[0079] Optionally, see Figure 1 and Figure 5 The connecting component 300 also includes a filler 305. A second mounting groove 204 is provided on the precast foundation 200. The pull-out member 303 passes through the connector 301 and is inserted into the second mounting groove 204, with the filler 305 filling the space between the pull-out member 303 and the groove wall of the second mounting groove 204. The filler 305 fills the gap between the pull-out member 303 and the groove wall of the second mounting groove 204, improving the tightness and integrity of the connection between the pull-out member 303 and the precast foundation 200, preventing movement between them, and improving the overall load-bearing capacity of the structure. Moreover, the filler 305 can repair structural damage caused by construction defects, material aging, or external forces, further improving the integrity between the pull-out member 303 and the precast foundation 200.

[0080] Specifically, the precast foundation 200 is provided with a second filling channel and a second overflow channel. Both the second filling channel and the second overflow channel are connected to the second mounting groove 204. The filler material 305 can enter the second mounting groove 204 through the second filling channel. After the groove wall of the second mounting groove 204 and the anti-pull-out member 303 are filled with the filler material 305, the filler material 305 can overflow through the second overflow channel to prompt the staff to stop filling.

[0081] For example, the pull-out resisting member 303 is made of threaded steel bar, which is threadedly connected to the groove wall of the second mounting groove 204, which helps to further improve the pull-out resisting effect of the pull-out resisting member 303.

[0082] In this embodiment, see Figure 1 and Figure 5The connecting assembly 300 also includes an mounting component 306. Anchors 307 are embedded in the precast foundation 200, and the mounting component 306 is threadedly connected to the anchors 307. A second mounting groove 204 is provided in the mounting component 306. Compared to the direct connection between the pull-out member 303 and the precast concrete foundation 200, the connection method achieved through the mounting component 306 can effectively constrain the deformation of the pull-out member 303 in the precast foundation 200, reduce the slippage of the pull-out member 303, and help improve the reliability of the connection between the pull-out member 303 and the precast foundation 200. Moreover, the mounting component 306 can also protect the pull-out member 303 from damage by moisture and other substances, extending the service life of the pull-out member 303. In addition, the mounting component 306 is connected to the precast foundation 200 via the anchor 307 that is threaded to it. This not only ensures the reliability of the mounting component 306 on the precast foundation 200, but also allows the mounting component 306 to be removed from the precast foundation 200, thus improving the convenience of replacing the mounting component 306.

[0083] Specifically, see Figure 5 The mounting component 306 is provided with a filling port 3061 and an overflow port 3062. The second filling channel is connected to the second mounting groove 204 through the filling port 3061, and the second overflow channel is connected to the second mounting groove 204 through the overflow port 3062.

[0084] For example, the filler 305 is a grouting material, the mounting component 306 is a grouting sleeve, and the anchor 307 is a reinforcing bar. The grouting sleeve has threaded holes, and one end of the anchor 307 is anchored in the precast foundation 200, while the other end is threaded to the wall of the threaded hole. Preferably, the mounting component 306 is a corrugated grouting sleeve with a large diameter, which can eliminate installation errors between the pull-out member 303 and the precast foundation 200.

[0085] See Figure 1 and Figure 5 Multiple second mounting slots 204 and pull-out members 303 are provided. Multiple second mounting slots 204 are arranged at intervals along the circumference of the first mounting slot 201. Multiple pull-out members 303 correspond one-to-one with multiple first mounting slots 201, so that the steel pipe pile 100 can be firmly connected to the precast pile cap 200 around its perimeter.

[0086] In an optional embodiment, see [link to relevant documentation] Figure 1 and Figure 6The connecting assembly 300 also includes a plurality of first reinforcing members 308 disposed within the casting space 101. The plurality of first reinforcing members 308 are arranged at intervals along the circumference of the shear member 302. One end of each first reinforcing member 308 is connected to the inner wall of the steel pipe pile 100, and the other end is connected to the shear member 302. This arrangement helps to enhance the connection strength between the shear member 302 and the steel pipe pile 100, improve the reliability of the shear member 302 installation within the casting space 101, and increase the shear strength between the steel pipe pile 100 and the precast foundation 200.

[0087] For example, see Figure 6 The first reinforcing component, 308, is made of sheet metal.

[0088] In another alternative embodiment, see [link to relevant documentation]. Figure 1 and Figure 7 The connecting assembly 300 also includes a plurality of second reinforcing members 309 disposed on the connecting member 301. The plurality of second reinforcing members 309 are arranged at intervals along the circumference of the steel pipe pile 100, and the second reinforcing members 309 are connected to the outer wall of the steel pipe pile 100. This arrangement helps to enhance the overall rigidity of the connecting member 301 and the connection strength between the connecting member 301 and the steel pipe pile 100, and improves the connection reliability between the steel pipe pile 100 and the precast pile cap 200.

[0089] For example, see Figure 7 The second reinforcing member 309 is made of sheet metal.

[0090] See Figure 7 The second reinforcing component 309 has eight parts.

[0091] In another alternative embodiment, see [link to relevant documentation]. Figure 1 and Figure 7 The connecting component 300 includes both a first reinforcing member 308 and a second reinforcing member 309.

[0092] Optionally, see Figure 6 and Figure 7 The connector 301 is provided with a grouting hole 3011 that communicates with the pouring space 101. Concrete can enter the pouring space 101 through the grouting hole 3011 to realize the pouring of concrete in the pouring space 101.

[0093] In this embodiment, see Figure 6 Multiple grouting holes 3011 are provided, and the multiple grouting holes 3011 are arranged at intervals along the circumference of the connector 301, which improves the efficiency of concrete pouring.

[0094] For example, the connector 301 is provided with six grouting holes 3011.

[0095] Optionally, see Figure 1 , Figure 6 and Figure 7 The connector 301 has a connecting hole 3012. The pull-out member 303 passes through the connecting hole 3012 and is anchored to the precast pile cap 200. The cross-sectional diameter of the connecting hole 3012 is larger than that of the pull-out member 303. This design not only achieves the connection between the connector 301 and the precast pile cap 200, but also allows the pull-out member 303 a certain amount of movement when passing through the connecting hole 3012. This facilitates fine-tuning of the relative position between the precast pile cap 200 and the steel pipe pile 100, reducing installation errors.

[0096] In this embodiment, see Figure 1 and Figure 6 Multiple connecting holes 3012 and multiple pull-out members 303 are provided. Multiple connecting holes 3012 are arranged at intervals along the circumference of the steel pipe pile 100, and multiple pull-out members 303 correspond one-to-one with multiple connecting holes 3012.

[0097] For example, the connector 301 is provided with eight connection holes 3012.

[0098] See Figure 6 and Figure 7 The connector 301 is a flange with a circular cross-section, and the diameter of the connector 301 is larger than the outer diameter of the steel pipe pile 100. The center of the connector 301 is the same as the center of the steel pipe pile 100. The grouting hole 3011 is located on the inner ring of the flange, and the connecting hole 3012 is located on the outer ring of the flange.

[0099] Optionally, see Figure 7 The connector 301 is provided with a mounting hole 3013, and the shear-resistant member 302 passes through the mounting hole 3013.

[0100] Specifically, see Figure 7 The cross-sectional shape of the mounting hole 3013 is the same as that of the shear member 302.

[0101] For example, see Figure 7 The shear-resistant component 302 is made of H-beam steel, and the cross-sectional shape of the mounting hole 3013 is H-shaped.

[0102] Example 2

[0103] like Figures 1 to 11 As shown, this embodiment provides a method for connecting steel pipe piles and precast pile caps, applicable to the connection device of steel pipe piles and precast pile caps in Embodiment 1, including the following steps:

[0104] S1. Connect the shear-resistant member 302 and the connector 301 to the steel pipe pile 100.

[0105] Specifically, see Figure 7 and Figure 8Step S1 specifically includes the following steps:

[0106] S11. Connect the lower end of the separator 304 to the shear-resistant member 302, and connect the first reinforcing member 308 to the shear-resistant member 302.

[0107] S12. Insert the separator 304, the first reinforcing member 308 and the shear-resistant member 302 into the inner hole of the steel pipe pile 100, and connect the separator 304 and the first reinforcing member 308 to the inner hole wall of the steel pipe pile 100. At this time, the upper end of the shear-resistant member 302 is located above the steel pipe pile 100.

[0108] S13. Move the connector 301 upwards towards the steel pipe pile 100 and allow the shear-resistant member 302 to pass through the mounting hole 3013 until the connector 301 contacts the top surface of the steel pipe pile 100.

[0109] S14. Connect the connector 301 to the top surface of the steel pipe pile 100, and connect the second reinforcing member 309 to the connector 301 and the outer wall of the steel pipe pile 100.

[0110] S2. Install steel pipe pile 100 into foundation 400.

[0111] Specifically, see Figure 3 and Figure 10 Step S2 specifically includes the following steps: using the chuck of the vibratory hammer 500 to clamp the upper end of the shear-resistant member 302, and using the vibratory hammer 500 to drive the steel pipe pile 100 into the foundation 400. During this process, the shear-resistant member 302 can provide a clamping point for the connection between the vibratory hammer 500 and the steel pipe pile 100, improving the convenience of the vibratory hammer 500 clamping the steel pipe pile 100.

[0112] Optionally, see Figure 1 , Figure 9 and Figure 11 The connecting assembly 300 also includes a plurality of leveling parts 310, which have different thicknesses and one of them can be installed on top of the connecting part 301.

[0113] The steps following step S2 and before step S3 include: measuring the top elevation of the connector 301 and determining whether the measured elevation is equal to the preset elevation. The preset elevation is the design elevation of the top of the steel pipe pile 100. If the measured elevation is not equal to the preset elevation, it indicates that there is an error in the installation of the steel pipe pile 100.

[0114] Specifically, if the measured elevation is lower than the preset elevation, a leveling component 310 is selected based on the difference between the measured elevation and the preset elevation, and the leveling component 310 is installed on the top surface of the connector 301; if the measured elevation is higher than the preset elevation, the steel pipe pile 100 is moved down; if the measured elevation is equal to the preset elevation, step S3 is executed directly.

[0115] For example, leveling component 310 uses a pad.

[0116] S3. Pour concrete into the pouring space 101.

[0117] Specifically, see Figure 7 In step S3, concrete is injected into the pouring space 101 through multiple grouting holes 3011.

[0118] S4. Move the precast foundation 200 above the connector 301 so that the shear member 302 can be inserted into the precast foundation 200; then, pass the pull-out member 303 through the connector 301 and anchor it to the precast foundation 200.

[0119] Optionally, see Figure 1 , Figure 7 and Figure 11 The connecting component 300 also includes a sealing element 311, and the connecting element 301 is provided with a connecting hole 3012.

[0120] Specifically, step S3 includes the following steps:

[0121] S31. Pour concrete into the pouring space 101;

[0122] S32. Use the sealing component 311 to seal the connecting hole 3012;

[0123] S33. A layer of cement mortar 312 is poured on the top surface of the connector 301. The cement mortar layer 312 has high fluidity and can fill the gap between the precast foundation 200 and the connector 301 when the precast foundation 200 comes into contact with the connector 301, thereby improving the tightness of the connection between the precast foundation 200 and the connector 301.

[0124] Since a cement mortar layer 312 will be poured on the top surface of the connector 301 in step S33, in order to prevent the cement mortar layer 312 from blocking the connection hole 3012, the connection hole 3012 is sealed in advance by the sealing member 311 in step S32.

[0125] For example, the sealing element 311 is a plug.

[0126] Specifically, step S4 includes the following steps:

[0127] S41. Remove the sealing element 311 from the connection hole 3012.

[0128] Furthermore, before removing the sealing component 311, excess cement mortar around the connector 301 needs to be scraped off.

[0129] S42. Move the precast foundation 200 above the connector 301 so that the shear member 302 can be inserted into the precast foundation 200.

[0130] See Figure 1 , Figure 4 and Figure 11 In the process of moving the precast foundation 200, the multiple second mounting slots 204 on the precast foundation 200 need to correspond one-to-one with the multiple connecting holes 3012, and the first mounting slot 201 needs to correspond with the position of the shear member 302. Thus, by directly moving the precast foundation 200 down, the shear member 302 can be inserted into the first mounting slot 201 of the precast foundation 200.

[0131] S43. The pull-out member 303 is passed through the connecting hole 3012 and the cement mortar layer 312 and anchored to the precast pile cap 200 to realize the connection between the steel pipe pile 100 and the precast pile cap 200.

[0132] In this embodiment, the cross-sectional diameter of the connector 301 is larger than the cross-sectional diameter of the pull-out resisting member 303. In step S43, if there is a deviation between the axis of the pull-out resisting member 303 and the axis of the connecting hole 3012, the deviation can be corrected by driving the pull-out resisting member 303 to move slightly within the connecting hole 3012.

[0133] See Figure 1 The pull-out member 303 is made of threaded steel bar, and the connecting assembly 300 also includes a locking nut 313 and an anti-loosening nut 314.

[0134] Step S43 is followed by the following steps:

[0135] S44. First, thread the locking nut 313 to the pull-out resistant member 303, then thread the anti-loosening nut 314 to the pull-out resistant member 303, with the anti-loosening nut 314 located on the side of the locking nut 313 away from the connector 301. The anti-loosening nut 314 and the locking nut 313 are in close contact and can generate friction. This friction can be converted into a tightening torque between the anti-loosening nut 314 and the pull-out resistant member 303, and between the locking nut 313 and the pull-out resistant member 303, thereby improving the reliability of the connection and effectively preventing the locking nut 313 from loosening.

[0136] Optionally, see Figure 1 Step S4 and the following steps are also included:

[0137] S5. Spray a ring of foam sealant 315 at the connection between connector 301 and precast foundation 200 to prevent filler 305 from leaking from the gap between connector 301 and precast foundation 200 during subsequent filling.

[0138] Optionally, see Figure 1 and Figure 5The connecting component 300 also includes filler 305. The precast support 200 is provided with a first mounting groove 201 and a second mounting groove 204. The shear member 302 is inserted into the first mounting groove 201, and the pull-out member 303 passes through the connector 301 and is inserted into the second mounting groove 204.

[0139] Step S4 is followed by the following steps:

[0140] S6. Fill the shear-resistant member 302 between the wall of the first mounting groove 201 and the wall of the pull-out member 303 between the wall of the second mounting groove 204 with filler 305.

[0141] Specifically, the precast foundation 200 is provided with a first filling channel 202 and a first overflow channel 203, both of which are connected to the first mounting groove 201. The precast foundation 200 is also provided with a second filling channel and a second overflow channel, both of which are connected to the second mounting groove 204.

[0142] Step S6 specifically includes the following steps:

[0143] S61. Inject air into the first filling channel 202 and the second filling channel to blow out debris from the first filling channel 202, the first overflow channel 203, the second filling channel, the second overflow channel, the shear member 302 and the wall of the first mounting groove 201, and the pull-out member 303 and the wall of the second mounting groove 204 from the first overflow channel 203 or the second overflow channel.

[0144] S62. Inject filler 305 into the first filling channel 202 until filler 305 overflows from the first overflow channel 203 and no air bubbles are discharged; inject filler 305 into the second filling channel until filler 305 overflows from the second overflow channel and no air bubbles are discharged.

[0145] S63. Seal the first filling channel 202, the first overflow channel 203, the second filling channel, and the second overflow channel with wooden plugs, and let it stand until the filler material 305 hardens and solidifies. At this time, the filler material 305 can be tightly bonded to the shear-resistant member 302, the wall of the first mounting groove 201, the pull-out-resistant member 303, and the wall of the second mounting groove 204, thus completing the connection operation between the precast foundation 200 and the steel pipe pile 100.

[0146] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A connection device for steel pipe piles and precast pile caps, characterized in that, It includes steel pipe piles (100), precast pile caps (200) and connecting components (300), wherein the steel pipe piles (100) are connected to the precast pile caps (200) through the connecting components (300); The connection component (300) includes: A connector (301) is disposed on the top of the steel pipe pile (100), and the precast bearing platform (200) is located on the top of the connector (301). The connector (301) and the inner hole wall of the steel pipe pile (100) form a pouring space (101), and concrete is poured in the pouring space (101). Shear-resistant member (302), one end of which is located in the casting space (101), and the other end passes through the connector (301) and is inserted into the precast foundation (200). Pull-out member (303) passes through the connector (301) and is anchored to the precast bearing (200). The connecting assembly (300) further includes filler material (305), the precast support (200) is provided with a first mounting groove (201), the shear member (302) is inserted into the first mounting groove (201), and the shear member (302) and the groove wall of the first mounting groove (201) are filled with the filler material (305). The connector (301) is provided with a grouting hole (3011) communicating with the pouring space (101), and concrete can enter the pouring space (101) through the grouting hole (3011); the connector (301) is provided with a connecting hole (3012), the pull-out member (303) passes through the connecting hole (3012) and is anchored to the precast foundation (200), and the cross-sectional diameter of the connecting hole (3012) is larger than the cross-sectional diameter of the pull-out member (303); The connector (301) is provided with a mounting hole (3013), and the shear-resistant member (302) passes through the mounting hole (3013). The shear-resistant member (302) is made of H-beam steel, and the mounting hole (3013) has an H-shaped cross-section.

2. The connection device between the steel pipe pile and the precast pile cap according to claim 1, characterized in that, The inner hole of the steel pipe pile (100) is provided with a partition (304), the partition (304) is connected to the shear member (302), and the partition (304), the connector (301) and the inner hole wall of the steel pipe pile (100) form the casting space (101).

3. The connection device between the steel pipe pile and the precast pile cap according to claim 1, characterized in that, The connecting assembly (300) further includes a filler (305), a second mounting groove (204) is provided on the precast support (200), the pull-out member (303) passes through the connecting member (301) and is inserted into the second mounting groove (204), and the pull-out member (303) and the groove wall of the second mounting groove (204) are filled with the filler (305).

4. The connection device between the steel pipe pile and the precast pile cap according to claim 3, characterized in that, The connecting assembly (300) also includes an installation component (306), an anchor (307) is embedded on the precast support (200), the installation component (306) is threadedly connected to the anchor (307), and the second installation groove (204) is provided in the installation component (306).

5. The connection device between the steel pipe pile and the precast pile cap according to claim 1, characterized in that, The connecting assembly (300) further includes a plurality of first reinforcing members (308) disposed in the casting space (101). The plurality of first reinforcing members (308) are arranged at intervals along the circumference of the shear member (302). One end of the first reinforcing member (308) is connected to the inner hole wall of the steel pipe pile (100), and the other end is connected to the shear member (302). And / or, the connecting assembly (300) further includes a plurality of second reinforcing members (309) disposed on the connecting member (301), the plurality of second reinforcing members (309) being arranged circumferentially spaced along the steel pipe pile (100), the second reinforcing members (309) being connected to the outer wall of the steel pipe pile (100).

6. A method for connecting steel pipe piles to precast pile caps, characterized in that, The connection device for steel pipe piles and precast pile caps as described in any one of claims 1-5 includes the following steps: S1. Connect the shear-resistant member (302) and the connector (301) to the steel pipe pile (100); S2. Install the steel pipe pile (100) into the foundation (400); S3. Pour concrete into the pouring space (101). S4. Move the precast support (200) above the connector (301) so that the shear member (302) can be inserted into the precast support (200); then, pass the pull-out member (303) through the connector (301) and anchor it to the precast support (200).

7. The method for connecting steel pipe piles and precast pile caps according to claim 6, characterized in that, The connecting assembly (300) further includes a sealing member (311), and the connecting member (301) is provided with a connecting hole (3012). Step S3 specifically includes the following steps: S31. Pour concrete into the pouring space (101). S32. The connecting hole (3012) is sealed using the sealing member (311); S33. A layer of cement mortar (312) is poured on the top surface of the connector (301). Step S4 specifically includes the following steps: S41. Remove the sealing element (311) from the connecting hole (3012); S42. Move the precast support (200) above the connector (301) so that the shear member (302) can be inserted into the precast support (200); S43. Pass the pull-out member (303) through the connecting hole (3012) and the cement mortar layer (312) and anchor it to the precast foundation (200).

8. The method for connecting steel pipe piles and precast pile caps according to claim 6, characterized in that, The connecting assembly (300) also includes a plurality of leveling parts (310), the plurality of leveling parts (310) having different thicknesses, and one of the plurality of leveling parts (310) being able to be installed on the top of the connecting part (301); The steps following step S2 and before step S3 include: Measure the top elevation of the connector (301) and determine whether the measured elevation is equal to the preset elevation; If the measured elevation is less than the preset elevation, then select a leveling component (310) according to the difference between the measured elevation and the preset elevation, and install the leveling component (310) onto the top surface of the connector (301); If the measured elevation is higher than the preset elevation, the steel pipe pile (100) will continue to move down. If the measured elevation is equal to the preset elevation, then proceed directly to step S3.

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