Opposite hoop type U-shaped steel pipe pile crown beam fixing bolt

Abstract

The utility model provides an opposite hoop type U-shaped steel pipe pile top beam fixing bolt, which belongs to the technical field of steel pipe pile top beams, and comprises two U-shaped bolts, each U-shaped bolt is provided with two oppositely arranged arm parts and a transverse part connected with the arm parts, the number of the U-shaped bolts is two, and the transverse part is connected with the arm parts. The transverse parts of the two U-shaped bolts are oppositely arranged, the transverse parts are tightly attached to a steel pipe pile, the arm parts are fixedly connected with channel steel top beams through nuts and bolts, the two channel steel top beams are arranged in parallel, the bolts are fixed to the channel steel top beams through steel pressing plates, and the projection of the connecting position of the transverse parts of the two U-shaped bolts is circular. The diameter of the circle is equal to the diameter of the steel pipe pile, a nut is arranged at the end, away from the transverse part, of the arm part, the nut is used for being fixedly connected with the bolt, and compared with a traditional single-side fixing mode, the opposite-direction hoop can balance stress on the two sides more effectively.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe pile crown beams, and in particular relates to a pair of opposite hoop type U-shaped steel pipe pile crown beam fixing bolts. Background Art

[0002] In the vast field of contemporary civil engineering, U-shaped steel pipe piles, as a key infrastructure technology, are widely used in various structural systems such as bridges, high-rise buildings, and underground projects. With its unique geometric shape and excellent mechanical properties, U-shaped steel pipe piles have shown significant advantages in bearing capacity, bending stiffness, and interaction with the soil, and have become an effective means to solve the problem of structural stability under complex geological conditions. However, with the increasing application of U-shaped steel pipe piles in various harsh environments, how to ensure the long-term stability and safety of the crown beam of U-shaped steel pipe piles, especially when subjected to natural forces such as earthquakes, wind loads, and groundwater level changes, has become a key technical challenge that needs to be solved urgently.

[0003] Traditional methods of fixing the crown beam of U-shaped steel pipe piles, such as welding, ordinary bolt connection, and binding, have met the initial engineering needs to a certain extent, but have gradually exposed many technical bottlenecks and shortcomings during long-term service. First, although welding connections can provide higher strength and stiffness, the presence of heat-affected zones may lead to local degradation of material properties, especially in the area near the weld, which can easily lead to the risk of stress concentration and crack propagation. Secondly, although ordinary bolt connections are easy to operate, the control of the tightening force is not precise enough, and they are easily affected by vibration and environmental factors, resulting in loose connections and difficulty in effective online monitoring and maintenance. Furthermore, although the binding method is low-cost, its mechanical properties and durability are poor, and it is difficult to adapt to the strict requirements of modern engineering for structural safety. Utility Model Content

[0004] In view of this, the utility model provides a pair of opposing clamp type U-shaped steel pipe pile crown beam fixing bolts, which solves the problem of local stress concentration in traditional fixing methods and effectively balances the forces on both sides.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a opposed clamp type U-shaped steel pipe pile crown beam fixing bolt, which comprises a U-shaped bolt, wherein the U-shaped bolt has two arms arranged oppositely and a cross portion connecting the arms, there are two U-shaped bolts, the cross portions of the two U-shaped bolts are arranged oppositely, the cross portions are arranged close to the steel pipe pile, the arms are fixedly connected to the channel steel crown beam through nuts and bolts, the two channel steel crown beams are arranged in parallel, and the bolts are fixed to the channel steel crown beams through steel pressure plates.

[0007] Opposite clamps: In civil engineering, a clamp is a ring-shaped structural member, mainly used to tightly fix or surround a component on another structure. Opposite clamps are used in pairs and apply restraining force from opposite directions to enhance the fixing effect. This design can effectively balance the forces on both sides and prevent structural instability caused by excessive force on one side.

[0008] U-shaped steel pipe pile: U-shaped steel pipe pile is a special type of steel pipe pile with a U-shaped cross section. This shape makes the steel pipe pile more firmly embedded in the soil. At the same time, the U-shaped cross section also has good bending resistance and is suitable for occasions with large lateral pressure.

[0009] Crown beam: Crown beam is a common transverse connection structure in foundation engineering, which is often used to connect the tops of multiple independent pile foundations to increase the stability of the overall structure. The crown beam not only transfers the upper structure load to each pile foundation, but also enhances the overall stiffness of the entire foundation system.

[0010] Fixing bolt: A fixing bolt is a fastener used to connect two or more parts. By tightening the nut or cap, a preload is generated to keep the connected parts relatively stationary. In the opposite clamp fixing bolt, the design and use of the bolt is to ensure a reliable connection between the clamp and the crown beam.

[0011] On the basis of the above technical solution, the opposite clamp type U-shaped steel pipe pile crown beam fixing bolt of the utility model can also be improved as follows:

[0012] Wherein, the projection of the lateral connection point of the two U-shaped bolts is circular.

[0013] Furthermore, the circular diameter is equal to the diameter of the steel pipe pile.

[0014] Furthermore, a nut is provided at one end of the arm away from the cross portion, and the nut is used for being fixedly connected to the bolt.

[0015] Furthermore, the height of the channel steel crown beam is 175-185 mm.

[0016] The specific performance parameter of the channel steel crown beam is 18b, and "18b" is a model of channel steel. Channel steel is a long steel strip with a groove shape, which is widely used in building structures, bridges, machinery manufacturing and other fields. Its model usually contains numbers and letters. The number represents the height of the channel steel (usually in millimeters), and the letter represents different specifications of channel steel at the same height, generally a, b, c, etc., which are used to distinguish channel steels of different thickness and weight.

[0017] Furthermore, the transverse portion is semicircular, and the radius of the semicircle is 80-85 mm.

[0018] Furthermore, one end of the bolt is connected to the arm, and the other end is fixed to the outer side of the channel steel crown beam through the steel pressure plate.

[0019] Furthermore, the length of the arm portion is greater than half of the radius of the transverse portion and less than the radius of the transverse portion.

[0020] Furthermore, the dimensions of the steel pressure plate are: length 290 mm, width 50 mm, and thickness 10 mm.

[0021] Furthermore, the steel pipe pile has a diameter of 140-150 mm and a wall thickness of 6-9 mm.

[0022] Compared with the prior art, the utility model provides a pair of opposite hoop type U-shaped steel pipe pile crown beam fixing bolts with the following beneficial effects:

[0023] Balanced force and structural stability: The design of the opposite clamp ensures the uniform distribution of external force, effectively avoids local stress concentration, and significantly improves the structural stability and safety of the U-shaped steel pipe pile crown beam. Compared with the traditional unilateral fixing method, the opposite clamp can more effectively balance the force on both sides and prevent structural instability caused by excessive force on one side;

[0024] Convenient installation and improved efficiency: By using standardized components and electric tools, the utility model greatly simplifies the installation process and improves on-site work efficiency. The fit between the opposite clamp and the crown beam of the U-shaped steel pipe pile can be adjusted in an intuitive way without the need for complex measuring equipment, reducing the reliance on professional skills and speeding up the construction progress;

[0025] Easy maintenance and cost saving: The unique design allows for quick disassembly and inspection, which is convenient for daily maintenance and troubleshooting. Once loose or unstable connections are found, they can be quickly adjusted and re-tightened, significantly reducing maintenance costs and downtime, and improving the economic benefits of the overall project;

[0026] Environmental adaptability and durability: With the selection of high-strength, corrosion-resistant materials and advanced surface treatment technology, this utility model can maintain high performance and long life in various harsh environments. Whether it is a humid, salt spray or acid-base corrosion environment, the opposing clamp type fixing bolt system can maintain a stable connection state, extend the service life of the U-shaped steel pipe pile crown beam, and reduce the risk of structural failure caused by corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is an example diagram of a cap beam fixing bolt for a U-shaped steel pipe pile with opposing hoop type;

[0029] Figure 2 This is an example diagram of a U-bolt for fixing the cap beam of a U-shaped steel pipe pile with opposing hoop type;

[0030] Figure 3 This is an example of a U-shaped steel pipe pile cap beam fixing bolt before installation;

[0031] Figure 4 This is an example of the installation of the fixing bolts of the crown beam of a U-shaped steel pipe pile with opposing hoop;

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 10. Steel pipe pile; 20. Channel steel crown beam; 30. Steel pressure plate; 40. Bolt; 50. U-bolt; 51. Arm; 52. Horizontal part. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the implementation mode of the present invention clearer, the technical solution in the implementation mode of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the implementation mode of the present invention.

[0035] like Figure 1 , Figure 2 As shown, it is a first embodiment of a opposed clamp type U-shaped steel pipe pile crown beam fixing bolt provided by the utility model. In this embodiment, it includes a U-shaped bolt 50, and the U-shaped bolt 50 has two oppositely arranged arms 51 and a cross portion 52 connecting the arm portions 51. There are two U-shaped bolts 50, and the cross portions 52 of the two U-shaped bolts 50 are arranged oppositely. The cross portions 52 are arranged close to the steel pipe pile 10. The arm portions 51 are fixedly connected to the channel steel crown beam 20 through nuts and bolts 40. The two channel steel crown beams 20 are arranged in parallel, and the bolts 40 are fixed to the channel steel crown beam 20 through steel pressure plates 30.

[0036] Among them, in the above technical solution, the connection point of the transverse parts 52 of the two U-shaped bolts 50 is projected into a circle.

[0037] Furthermore, in the above technical solution, the circular diameter is equal to the diameter of the steel pipe pile 10 .

[0038] Furthermore, in the above technical solution, a nut is provided at one end of the arm portion 51 away from the cross portion 52 , and the nut is used to be fixedly connected to the bolt 40 .

[0039] Furthermore, in the above technical solution, the height of the channel steel crown beam 20 is 175-185 mm.

[0040] Furthermore, in the above technical solution, the transverse portion 52 is semicircular, and the radius of the semicircle is 80-85 mm.

[0041] Furthermore, in the above technical solution, one end of the bolt 40 is connected to the arm 51 , and the other end is fixed to the outer side of the channel steel crown beam 20 through the steel pressure plate 30 .

[0042] Furthermore, in the above technical solution, the length of the arm portion 51 is greater than half of the radius of the transverse portion 52 and less than the radius of the transverse portion 52 .

[0043] Furthermore, in the above technical solution, the dimensions of the steel pressure plate 30 are: length 290 mm, width 50 mm, and thickness 10 mm.

[0044] Furthermore, in the above technical solution, the diameter of the steel pipe pile 10 is 140-150 mm, and the wall thickness is 6-9 mm.

[0045] When using it, it includes the following steps:

[0046] (1) Preparation stage:

[0047] like Figure 3 As shown, before starting installation, make sure all components (opposite clamps, special bolts, nuts, electric wrenches, etc.) are complete and in good condition. Check the surface of the U-shaped steel pipe pile crown beam and remove any foreign matter or protrusions that may affect the fit of the clamp.

[0048] (2) Install the opposite clamp:

[0049] Position the opposite clamps: Place the opposite clamps on both sides of the U-shaped steel pipe pile crown beam, ensuring that the contact surface between the clamps and the crown beam fits completely without any gaps. This step is crucial for the subsequent tightening effect.

[0050] Preliminary fixation: Use an electric wrench to preliminarily tighten the screws between the opposing clamps and the preset steel pressure plate, but do not tighten them completely to leave room for adjustment.

[0051] Fine-tune the position: reconfirm the fit between the clamp and the crown beam, and make fine adjustments if necessary to ensure close contact between the two.

[0052] (3) Mounting bolts:

[0053] like Figure 4As shown, align the holes: pass the opposing clamp bolts through the holes reserved in one clamp, making sure that the bolt axis is aligned with the corresponding hole in the other clamp.

[0054] Insert the bolt: Smoothly insert the other end of the bolt into the hole of the clamp on the other side, making sure the bolt passes smoothly without getting stuck.

[0055] Install nuts: Install nuts on both sides of the bolt and tighten them by hand initially.

[0056] Tighten the nuts: Use a wrench to tighten the nuts on both sides alternately until the predetermined pre-tightening force is reached. Be careful to keep the tightening force even to avoid structural imbalance caused by over-tightening on one side.

[0057] Specifically, the principle of the utility model is:

[0058] Opposite clamp assembly: It consists of two sets of symmetrical clamps, which are tightly wrapped around the two sides of the U-shaped steel pipe pile crown beam through pre-tightening force to form a closed constraint ring. The inner side of the clamp may be equipped with a soft pad such as rubber or polyurethane to increase friction and protect the crown beam from wear;

[0059] High-strength bolts and nuts: Special bolts that pass through the reserved holes of the clamps are usually made of high-strength alloy steel with excellent tensile strength and corrosion resistance. Both ends of the bolts are locked with nuts to ensure the tightness of the connection and the uniform distribution of the preload force;

[0060] Preload control system: The preload value is determined by precise calculation and experiment to ensure that the bolts can maintain the best tightening state under various working conditions. The setting of preload takes into account the influence of factors such as material elasticity, temperature change, load fluctuation, etc.

Claims

1. A U-shaped steel pipe pile crown beam fixing bolt with opposing hoop, characterized in that: The invention comprises a U-shaped bolt (50), wherein the U-shaped bolt (50) has two arms (51) arranged opposite to each other and a transverse portion (52) connected to the arms (51). There are two U-shaped bolts (50), the transverse portions (52) of the two U-shaped bolts (50) are arranged opposite to each other, the transverse portions (52) are arranged close to the steel pipe pile (10), the arms (51) are fixedly connected to the channel steel crown beam (20) through nuts and bolts (40), the two channel steel crown beams (20) are arranged in parallel, and the bolts (40) are fixed to the channel steel crown beam (20) through steel pressure plates (30).

2. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 1, characterized in that: The projection of the connection point of the transverse parts (52) of the two U-shaped bolts (50) is circular.

3. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 2, characterized in that: The circular diameter is equal to the diameter of the steel pipe pile (10).

4. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 3 is characterized in that: A nut is provided at one end of the arm portion (51) away from the transverse portion (52), and the nut is used to be fixedly connected to the bolt (40).

5. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 4, characterized in that: The height of the channel steel crown beam (20) is 175-185 mm.

6. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 5, characterized in that: The transverse portion (52) is semicircular, and the radius of the semicircle is 80-85 mm.

7. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 6, characterized in that: One end of the bolt (40) is connected to the arm portion (51), and the other end is fixed to the outside of the channel steel crown beam (20) through the steel pressure plate (30).

8. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 7, characterized in that: The length of the arm portion (51) is greater than half of the radius of the transverse portion (52) and less than the radius of the transverse portion (52).

9. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 8, characterized in that: The dimensions of the steel pressing plate (30) are: 290 mm in length, 50 mm in width and 10 mm in thickness.

10. The opposite clamp type U-shaped steel pipe pile crown beam fixing bolt according to claim 9, characterized in that: The steel pipe pile (10) has a diameter of 140-150 mm and a wall thickness of 6-9 mm.

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