Steel casing for bridge pile foundation construction

Abstract

The utility model provides a steel casing for bridge pile foundation construction, which relates to the technical field of bridge pile foundation construction and comprises a main connecting round pipe and an auxiliary connecting round pipe, a connecting and protecting disc is fixed at the upper end of the main connecting round pipe, a combined disc is fixed at the bottom of the auxiliary connecting round pipe, a second clamping box is fixed on the peripheral surface of the combined disc, and a first clamping box is fixed on the peripheral surface of the connecting and protecting disc. A threaded column is slidably connected into the second clamping box, a rotating knob is in threaded connection with the surface of the threaded column, the bottom of the rotating knob is rotatably connected with the upper end of the second clamping box, interconnection clamping teeth are fixed to the bottom of the second clamping box, a first meshing cylinder is rotatably connected into the interconnection clamping teeth, and a connecting plate is fixed to the back of the first meshing cylinder. The surface of the connecting plate is slidably connected with a sliding shaft, the inner wall of the sliding shaft is rotatably connected with the bottom of the threaded column, and by additionally arranging a flange connecting mechanism, rapid splicing of the steel protection pipe is achieved, time and labor are saved, and the problem of complexity of bolts is solved.

Description

Technical Field

[0001] This utility model relates to the field of bridge pile foundation construction technology, and in particular to a steel casing for bridge pile foundation construction. Background Technology

[0002] With economic development and accelerated urbanization, the demand for transportation is increasing daily, and bridges, as important transportation facilities, are seeing a continuous expansion in both scale and number. Whether it's bridges spanning rivers and lakes within cities or large bridges on highways and railways, extensive pile foundation construction is required for support. This provides a broad social demand context for the application of steel casings.

[0003] In existing technologies, the connection points of steel casings are the weakest links in their structure. Traditionally, steel casings are spliced ​​together using bolts, but this method has some obvious drawbacks. Bolt fixing is not only troublesome to install and disassemble, but if the connection is not firm, it can easily lead to problems such as leakage, loosening, or even falling off of the steel casing during construction, thereby affecting the quality and progress of pile foundation construction. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a steel casing for bridge pile foundation construction.

[0005] To achieve the above objectives, this utility model adopts the following technical solution, including a main connecting round tube and a secondary connecting round tube. A receiving protective disc is fixed to the upper end of the main connecting round tube, and a connecting disc is fixed to the bottom of the secondary connecting round tube. A second snap-fit ​​box is fixed to the circumference of the connecting disc, and a first snap-fit ​​box is fixed to the circumference of the receiving protective disc. A threaded post is slidably connected inside the second snap-fit ​​box, and a rotating knob is threadedly connected to the surface of the threaded post. The bottom of the rotating knob is rotatably connected to the upper end of the second snap-fit ​​box. Interlocking teeth are fixed to the bottom of the second snap-fit ​​box. A first engaging cylinder is rotatably connected inside the snap-fit ​​box. A connecting plate is fixed to the back of the first engaging cylinder. A sliding shaft is slidably connected to the surface of the connecting plate. The inner wall of the sliding shaft is rotatably connected to the bottom of the threaded cylinder. A second engaging cylinder is rotatably connected inside the first snap-fit ​​box. A connecting shaft is slidably connected to the second engaging cylinder through the connecting plate. A telescopic rod is rotatably connected to the inner wall of the connecting shaft. A telescopic column is slidably connected to the surface of the telescopic rod. A connecting spring is fixed to the surface of the telescopic column. The surface of the connecting spring is fixedly connected to the upper end of the telescopic rod.

[0006] Preferably, a circular annular anti-compression ridge is fixed inside the main connecting pipe, a vertical protective ridge is fixed on the surface of the circular annular anti-compression ridge, and an outer protective sleeve is bolted to the surface of the main connecting pipe. In the prior art, during the construction of bridge pile foundations, the steel casing faces a complex stress environment. It needs to withstand forces from different directions. The manner and magnitude of these forces will change with the construction progress and geological conditions. In particular, the connection and bottom of the steel casing are areas of concentrated stress. The connection point needs to withstand the weight of the steel casing itself, as well as various tensile and compressive forces generated during construction. The bottom, in direct contact with the foundation, bears the combined effects of the foundation's reaction force, soil pressure, and water pressure, leading to bending or torsional deformation. Uneven transmission of impact forces from construction equipment to the steel casing can also cause localized deformation. Due to their structural characteristics and stress concentration, the connection point and bottom are prone to stress concentration, resulting in stress values ​​significantly higher than in other areas, thus increasing the risk of localized failure. This invention employs reinforcing ridges. The circular compression ridge disperses the radial pressure acting on the main connecting pipe, ensuring even distribution around it. This prevents excessive localized pressure from causing deformation and improves its compressive strength. The vertical protective ridge transmits and disperses the axial force on the main connecting pipe. When the main connecting pipe is subjected to axial pressure, the vertical protective ridge transfers the force to other parts or supporting structures, reducing the stress on the main connecting pipe itself, thereby lowering the possibility of deformation and improving the stability of the steel casing.

[0007] Preferably, a pressure-resistant outer shell is fixed to the surface of the outer sheath, a pressure ring is fixed inside the pressure-resistant outer shell, a fixing bolt is fixed to the surface of the main connecting round tube, a fixing nut is threaded onto the surface of the fixing bolt, and an eight-pronged spring is slidably connected inside the pressure ring. The elasticity of the eight-pronged spring can also prevent the fixing bolt from loosening due to vibration or other factors during use. It can provide a certain preload to maintain a tight connection between the bolt and the nut, and avoid structural deformation or connection failure caused by bolt loosening.

[0008] Preferably, a limiting sleeve is detachably connected to the surface of the main connecting round pipe. A support plate is fixed to the bottom of the limiting sleeve, and a rubber pad is fixed to the surface of the support plate. The rubber pad has a corrugated groove on its surface. The corrugated groove design on the surface of the rubber pad can increase the friction between the rubber pad and the contact surface, prevent the limiting sleeve from sliding or displacing during use when transporting the steel protective pipe, and improve the stability of the entire structure.

[0009] Preferably, a top steel pipe is fixed to the bottom of the main connecting pipe, and a cone is fixed to the bottom of the top steel pipe. The cone has a pressure relief groove at its bottom. The shape of the cone makes it easier for the bottom of the main connecting pipe to be inserted into soil or other media. The cone can effectively separate soil particles, reduce the resistance encountered during insertion, and allow the entire structure to be inserted into the predetermined position faster and more smoothly.

[0010] Preferably, the upper end of the receiving disc is provided with an annular groove, and a sealing plug is fixed on the circumference of the annular groove. The design of the annular groove allows the sealing plug to better fit the surface of the receiving disc. Even in the case of minor unevenness or deviation, the gap can be filled by the elastic deformation of the sealing plug, achieving a reliable seal and preventing mud, groundwater, etc. from seeping into the interior of the steel casing, affecting the quality of concrete pouring and the bearing capacity of the pile foundation.

[0011] Beneficial effects

[0012] 1. In existing technologies, the connection points of steel casings are the weakest links in their structure. Traditionally, steel casings are spliced ​​using bolts, but this method has some obvious drawbacks. Bolt fixing is not only cumbersome to install and disassemble, but if the connection is not firm, it can easily lead to problems such as leakage, loosening, or even falling off of the steel casing during construction, thus affecting the quality and progress of pile foundation construction. By adding a flange connection mechanism, when workers need to splice and fix the steel casing, they turn the knob to lower the threaded column, so that the first interlocking column and the interlocking teeth are on the same plane. Then, the workers align the secondary connecting pipe with the main connecting pipe and splice it, so that the interlocking teeth engage with each other, while pressing the second interlocking column to keep it vertical. This continues until the connecting disc and the mating disc are completely spliced. Then, the workers turn the knob to reset the threaded column. At this time, the telescopic column and telescopic rod are reset by the connecting spring, so that the first and second interlocking columns rotate and reset, thus fixing them together and completing the installation. This achieves rapid splicing of the steel casing, saving time and effort and avoiding the cumbersome problems of bolts.

[0013] 2. In the existing technology, during the construction of bridge pile foundations, steel casings face a complex stress environment. They need to withstand forces from different directions. The manner and magnitude of these forces will change with the construction progress and geological conditions. In particular, the connection and bottom of the steel casing are areas of concentrated stress. The connection point needs to withstand the weight of the steel casing itself, as well as various tensile and compressive forces generated during construction. The bottom, in direct contact with the foundation, bears the combined effects of the foundation's reaction force, soil pressure, and water pressure, leading to bending or torsional deformation. Uneven transmission of impact forces from construction equipment to the steel casing can also cause localized deformation. Due to their structural characteristics and stress concentration, the connection point and bottom are prone to stress concentration, resulting in stress values ​​significantly higher than in other areas, thus increasing the risk of localized failure. This invention employs reinforcing ridges. The circular compression ridge disperses the radial pressure acting on the main connecting pipe, ensuring even distribution around it. This prevents excessive localized pressure from causing deformation and improves its compressive strength. The vertical protective ridge transmits and disperses the axial force on the main connecting pipe. When the main connecting pipe is subjected to axial pressure, the vertical protective ridge transfers the force to other parts or supporting structures, reducing the stress on the main connecting pipe itself, thereby lowering the possibility of deformation and improving the stability of the steel casing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the disassembly structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the steel pipe of this utility model;

[0017] Figure 4 This is a schematic diagram of the buffer structure of this utility model.

[0018] Legend:

[0019] 1. Main connecting round pipe; 101. Secondary connecting round pipe; 2. Connecting disc; 201. No. 1 snap-fit ​​box; 2011. No. 2 snap-fit ​​box; 202. Threaded column; 203. Rotating knob; 204. Interlocking teeth; 205. No. 1 interlocking column; 2051. No. 2 interlocking column; 206. Connecting plate; 207. Connecting spring; 208. Telescopic column; 209. Connecting disc; 3. Circular anti-pressure ridge; 301. Outer protective sleeve; 302. Vertical protective ridge; 4. Anti-pressure outer shell; 401. Pressure ring; 402. Fixing bolt; 403. Fixing nut; 404. Octagonal spring; 5. Limiting sleeve; 6. Top steel pipe; 601. Conical head. Detailed Implementation

[0020] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0021] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific implementation examples:

[0023] Reference Figure 1-4A steel casing for bridge pile foundation construction includes a main connecting pipe 1 and a secondary connecting pipe 101. A connecting disc 2 is fixed to the upper end of the main connecting pipe 1, and a connecting disc 209 is fixed to the bottom of the secondary connecting pipe 101. A second clamping box 2011 is fixed to the circumference of the connecting disc 209, and a first clamping box 201 is fixed to the circumference of the connecting disc 2. A threaded post 202 is slidably connected inside the second clamping box 2011, and a rotating knob 203 is threadedly connected to the surface of the threaded post 202. The bottom of the rotating knob 203 is rotatably connected to the upper end of the second clamping box 2011. Interlocking teeth 204 are fixed to the bottom of the second clamping box 2011. The first engagement cylinder 205 is rotatably connected inside the snap-fit ​​tooth 204. A connecting plate 206 is fixed to the back of the first engagement cylinder 205. A sliding shaft is slidably connected to the surface of the connecting plate 206. The inner wall of the sliding shaft is rotatably connected to the bottom of the threaded cylinder 202. A second engagement cylinder 2051 is rotatably connected inside the first snap-fit ​​box 201. The second engagement cylinder 2051 is slidably connected to a connecting shaft through the connecting plate 206. A telescopic rod is rotatably connected to the inner wall of the connecting shaft. A telescopic column 208 is slidably connected to the surface of the telescopic column 208. A connecting spring 207 is fixed to the surface of the telescopic column 208. The surface of the connecting spring 207 is fixedly connected to the upper end of the telescopic rod. In existing technologies, the connection points of steel casings are the weakest links in their structure. Traditionally, steel casings are spliced ​​together using bolts, but this method has some obvious drawbacks. Bolt fixing is not only cumbersome to install and disassemble, but if the connection is not firm, it can easily lead to problems such as leakage, loosening, or even detachment of the steel casing during construction, thus affecting the quality and progress of pile foundation construction. By adding a flange connection mechanism, when workers need to splice and fix the steel casing, they can turn the knob 203 to lower the threaded column 202, thereby keeping the first interlocking column 205 and the interlocking teeth 204 at the same level. Next, the workers align the auxiliary connecting round pipe 101 with the main connecting round pipe 1 and splice them together, so that the interlocking teeth 204 engage with each other. At the same time, they press the second interlocking cylinder 2051 to keep it vertical. Then, until the connecting disc 2 and the connecting disc 209 are fully spliced, the workers turn the rotating knob 203 to reset the threaded column 202. At this time, the telescopic column 208 and the telescopic rod are reset by means of the connecting spring 207, so that the first interlocking cylinder 205 and the second interlocking cylinder 2051 rotate and reset, thus fixing them together and completing the installation. This achieves rapid splicing of the steel protective pipe, saving time and effort and avoiding the cumbersome problem of bolts.

[0024] The main connecting round pipe 1 has a fixed circular pressure-resistant ridge 3 inside, and a vertical protective ridge 302 fixed on the surface of the circular pressure-resistant ridge 3. The main connecting round pipe 1 has an outer sheath 301 fixed on the surface of the main connecting round pipe 1. The outer sheath 301 has a pressure-resistant outer shell 4 fixed on the surface of the outer sheath 301. The pressure-resistant outer shell 4 has a pressure ring 401 fixed inside. The main connecting round pipe 1 has a fixed bolt 402 fixed on the surface of the main connecting round pipe 1. The fixed bolt 402 has a fixed nut 403 threaded on the surface of the fixed bolt 402. The pressure ring 401 has an eight-claw spring 404 slidably connected inside. The main connecting round pipe 1 has a detachable limit sleeve 5. The bottom of the limit sleeve 5 has a support plate fixed on the bottom. The support plate has a rubber pad fixed on its surface. The rubber pad has a corrugated groove on its surface. The bottom of the main connecting round pipe 1 has a top steel pipe 6 fixed on the bottom. The bottom of the top steel pipe 6 has a cone head 601 fixed on the bottom. The bottom of the cone head 601 has a pressure relief groove. The upper end of the connecting round disc 2 has an annular groove. The annular groove has a sealing plug fixed on its circumference.

[0025] The working principle of this utility model is as follows: When workers need to splice and fix the steel protective pipe, they rotate the rotary knob 203 to lower the threaded column 202, thereby keeping the first interlocking column 205 and the interlocking teeth 204 on the same plane. Then, the workers align the auxiliary connecting round pipe 101 with the main connecting round pipe 1 and splice it, so that the interlocking teeth 204 engage with each other. At the same time, the second interlocking column 2051 is pressed to keep it vertical. Then, until the connecting disc 2 and the connecting disc 209 are completely spliced, the workers rotate the rotary knob 203 to reset the threaded column 202. At this time, the telescopic column 208 and the telescopic rod are reset by means of the connecting spring 207, thereby causing the first interlocking column 205 and the second interlocking column 2051 to rotate and reset, thus fixing them together and completing the installation. This achieves quick splicing of the steel protective pipe, saving time and effort and avoiding the cumbersome problem of bolts.

[0026] 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.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A steel casing for bridge pile construction, comprising a main connecting pipe and a sub connecting pipe, characterized in that: The main interface pipe upper end is fixed with an interface protection disc, the bottom of the auxiliary interface pipe is fixed with a combination disc, the combination disc peripheral surface is fixed with a second clamping box, the interface protection disc peripheral surface is fixed with a first clamping box, the second clamping box interior is slidably connected with a threaded column, the threaded column surface is threadedly connected with a rotating knob, the rotating knob bottom is rotatably connected with the second clamping box upper end, the second clamping box bottom is fixed with a mutual clamping tooth, the mutual clamping tooth interior is rotatably connected with a first occlusion cylinder, the first occlusion cylinder back is fixed with a connecting plate, the connecting plate surface is slidably connected with a sliding shaft, the sliding shaft inner wall is rotatably connected with the threaded column bottom, the first clamping box interior is rotatably connected with a second occlusion cylinder, the second occlusion cylinder is slidably connected with a connecting shaft through the connecting plate, the connecting shaft inner wall is rotatably connected with a lifting and retracting rod, the lifting and retracting rod surface is slidably connected with an extension column, the extension column surface is fixed with a connecting spring, the connecting spring surface is fixedly connected with the extension rod upper end.

2. A steel casing for bridge pile construction according to claim 1, characterized in that: The main interface pipe interior is fixed with a circular anti-pressure ridge, the circular anti-pressure ridge surface is fixed with a vertical protection ridge.

3. A steel casing for bridge pile construction according to claim 2, characterized in that: The main interface pipe surface is bolted with an external interface sheath.

4. A steel casing for bridge pile construction according to claim 3, characterized in that: The external interface sheath surface is fixed with a pressure-resistant shell, the pressure-resistant shell interior is fixed with a pressure ring, the main interface pipe surface is fixed with a fixed bolt, the fixed bolt surface is threadedly connected with a fixed nut.

5. A steel casing for bridge pile construction according to claim 4, characterized in that: The pressure ring interior is slidably connected with an eight-claw elastic sheet.

6. A steel casing for bridge pile construction according to claim 1, characterized in that: The main interface pipe surface is detachably connected with a limiting sheath.

7. A steel casing for bridge pile construction according to claim 6, characterized in that: The limiting sheath bottom is fixed with a support plate, the support plate surface is fixed with a rubber pad.

8. A steel casing for bridge pile construction according to claim 7, characterized in that: The rubber pad surface is provided with a corrugated groove.

9. A steel casing for bridge pile construction according to claim 1, characterized in that: The main interface pipe bottom is fixed with a top-end steel pipe, the top-end steel pipe bottom is fixed with a taper head, the taper head bottom is provided with a pressure relief groove.

10. A steel casing for bridge pile construction according to claim 1, characterized in that: The interface protection disc upper end is provided with a ring groove, the ring groove peripheral surface is fixed with a sealing plug. The main interface pipe bottom is fixed with a top-end steel pipe, the top-end steel pipe bottom is fixed with a taper head, the taper head bottom is provided with a pressure relief groove.

Images