Rotary rock-implanted steel pipe pile

Abstract

A rotary rock-implanted steel pipe pile is characterized in that the rotary rock-implanted steel pipe pile is composed of a pile top sleeve male connector (1), a pile middle pipe joint (2) and a pile tip pipe joint (3), and a wear-resistant body (4) is arranged at the pile tip of the pile tip pipe joint (3). The utility model provides a steel pipe pile which is reliable in performance, convenient to construct and low in cost for medium tuff construction. The device is directly driven into a high-hardness foundation through a pile rotating machine, the stability is high, the construction speed is high, the construction cost is saved by more than 50%, and high-difficulty foundation construction can be completed at a time.

Description

Technical Field

[0001] This utility model relates to a steel sheet pile technology, and more particularly to a steel pipe pile suitable for use in moderately weathered tuff strata, specifically a rotary-driven rock-embedded steel pipe pile. Background Technology

[0002] Currently, steel pipe piles are commonly driven into the ground during foundation construction. The depth to which these piles are driven varies depending on the type of surface load. For steel pipe piles that only need to be driven into completely weathered tuff, pressure is typically used to press ordinary steel pipe piles into the foundation. However, for steel pipe piles that need to be driven into strongly weathered tuff, stiffening rings must be added to both ends of the pile to apply pressure and penetrate the strongly weathered tuff to reach the designated location. Figure 1 As shown. However, for steel pipe piles that need to be driven into moderately weathered tuff, because its hardness exceeds the penetrating power of the stiffening ring, even with great pressure, it cannot penetrate into the foundation. The only solution is to drill first and then insert the steel pipe pile. This weakens the wedge force between the subsequently inserted steel pipe pile and the foundation, affecting the performance of the load-bearing structure, requiring a series of costly measures to address. Therefore, designing a steel pipe pile that can be directly driven into moderately weathered tuff is a beneficial means to solve this type of foundation construction problem. Utility Model Content

[0003] The purpose of this invention is to address the problem that existing steel pipe piles cannot be directly driven into medium-grade tuff, which affects construction progress and cost, and to design a rotary-type rock-implanting steel pipe pile.

[0004] The technical solution of this utility model is:

[0005] A rotary-driven rock-embedded steel pipe pile is characterized by comprising a pile top sleeve male connector 1, a pile middle pipe section 2, and a pile tip pipe section 3, wherein a wear-resistant body 4 is provided at the pile tip of the pile tip pipe section 3.

[0006] The pile pipe section 2 is made of multiple welded segments.

[0007] The aforementioned pile top sleeve male connector 1 is a standard part that matches the rotary pile machine and is manufactured by turning and boring.

[0008] The wear-resistant body is formed by welding with wear-resistant welding rods.

[0009] The wear-resistant welding electrode mentioned is the LQ605 type welding electrode.

[0010] The beneficial effects of this utility model are:

[0011] This invention provides a reliable, convenient, and low-cost steel pipe pile for construction in medium-hardness tuff. It is driven directly into high-hardness foundations using a rotary pile driver, exhibiting high stability, fast construction speed, and cost savings of over 50%, enabling the completion of complex foundation construction in a single operation.

[0012] The rotary implantable rock steel pipe pile of this utility model is made of low alloy high-strength structural steel Q355B, which has a wide range of applications. Because it uses static pressure to press the pile tip into areas where the pile hammer cannot be inserted, it can ensure the stability of the pile tip and guarantee the flatness and verticality during pile insertion. Attached Figure Description

[0013] Figure 1 This is a schematic diagram showing the positions of existing steel pipe piles and the steel pipe piles of this utility model inserted into the foundation.

[0014] Figure 2 This is a schematic diagram of the structure of the rotary implantable rock steel pipe pile of this utility model.

[0015] Figure 3 yes Figure 2 Enlarged schematic diagram of a portion (part A) of the pile tip.

[0016] Figure 4 This is a schematic diagram of the male connector structure of the pile top sleeve of this utility model.

[0017] Figure 5 This is a schematic diagram of the manufacturing process of the pipe section in the pile according to this utility model. In the figure, 5 is a CNC welding robot, 6 is the pipe section workpiece, 7 is a movable active roller frame, 8 is a movable passive roller frame, and 9 is an internal CNC welding equipment.

[0018] Figure 6 This is a schematic diagram of the manufacturing process of the pile tip pipe section of this utility model.

[0019] Figure 7 This is a schematic diagram of the overall molding process of this utility model. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figures 2-7 As shown.

[0022] A type of rotary-driven rock-steel pipe pile, such as Figure 2 As shown, it consists of a pile top sleeve male connector 1 (1080-40 sleeve male connector OD1080mm, thickness 40mm, length 304mm, as shown). Figure 4 The pile consists of two sections: 1) pile middle section 2 (OD 1036mm, thickness 16mm, length 12~16m), 2) pile tip section 3 (OD 1036mm, thickness 20mm, length 500~1000mm), and a wear-resistant body 4 welded to the pile tip (which can be formed by conventional welding process using LQ605 wear-resistant welding wire, such as...). Figure 3(As shown). The steel pipe pile is made of low-alloy high-strength structural steel Q355B, which has a wide range of applications. Its ability to withstand static pressure from the weight of the pile hammer in areas where it cannot be inserted ensures the stability of the pile tip and guarantees flatness and verticality during pile insertion. In this embodiment, the pipe section 2 in the pile is formed by welding six sections.

[0023] Figure 2 The rotary rock-embedded steel pipe pile shown can be manufactured by the following steps.

[0024] a. Fabrication of male connector 1 for pile top sleeve: (e.g.) Figure 4 The 1080-40 sleeve male connector shown can be manufactured using CNC lathes and CNC boring machines, and precision machined according to the 1080-40 sleeve male connector drawings. After machining, the dimensional inspection and quality detection instrument will be used to check the quality of qualified products. Alternatively, it can be directly customized or purchased.

[0025] b. Manufacturing process of straight seam pipe section 2 in pile:

[0026] After the steel coil is uncoiled by the feeding machine, it is leveled by a CNC leveling machine and then cut into blocks according to length by a CNC shearing machine. Straight round tubes are then produced using a CNC three-axis rolling machine. Six pieces of the straight tubes are welded using a CNC welding robot (5) and a submerged arc welding device (9). The first to fifth inner and outer circumferential welds are welded sequentially using the CNC welding robot (5) and the submerged arc welding device (9). (The circumferential welds are formed by spot welding adjacent pipe sections before placing them on a roller frame. The movable active roller frame and the movable passive roller frame adjust the relative distance to match the pipe section length. The movable active roller drives the pipe section to rotate, thus forming the weld.) After welding, the qualified products are inspected and analyzed by a quality detector and then reserved for use. Figure 5 .

[0027] c. Manufacturing process of straight seam pipe section 3 at the pile tip:

[0028] After the steel coil is uncoiled by the feeding machine, it is leveled by a CNC leveling machine, then cut into blocks of the specified length by a CNC shearing machine for later use. A CNC three-axis rolling machine is used to fabricate straight round pipes. The inner and outer welds of the straight pipes are then welded using a CNC welding robot and a submerged arc welding device. The pipes are inspected and analyzed by a quality detector to ensure they meet the required standards. A 30° bevel is required at the tip of the pipe, and then wear-resistant strips and welding wire (LQ605) are used to surfacing the bevel to increase the wear resistance of the pipe end. For example... Figure 6 As shown.

[0029] d. Manufacturing process of rotary-driven rock-embedded steel pipe pile integral pile:

[0030] The qualified pile top sleeve male connector 1, pile middle pipe section 2, and pile tip pipe section 3 are spot-welded together section by section and placed on a movable active roller frame and a movable passive roller frame. The relative distance is adjusted to match the length of the spliced ​​pipe sections. The movable active roller drives the pipe sections to rotate, thereby forming a weld. The CNC welding robot 5 and the submerged arc welding equipment 9 are used to weld the first and second inner and outer circumferential welds in sequence, welding all three sections into one piece (e.g., ...). Figure 7 (As shown), then the quality is tested and analyzed by a quality detector. After passing the test, anti-corrosion coating is applied, markings are applied, and the product is packaged and stacked.

[0031] The feeding machine, uncoiler, leveler, data shearing machine, CNC three-axis rolling machine, CNC welding robot, and submerged arc welding equipment used in this utility model can all be purchased directly from the market or implemented using existing equipment of steel sheet pile manufacturing enterprises.

[0032] The parts not covered in this utility model are the same as or can be implemented using existing technologies.

Claims

1. A rotary-driven rock-embedded steel pipe pile, characterized in that: It consists of a male connector for the top sleeve of the pile (1), a pipe section in the middle of the pile (2) and a pipe section at the tip of the pile (3). The tip of the pipe section at the tip of the pile is provided with a wear-resistant body (4).

2. The rotary-mounted rock-embedded steel pipe pile according to claim 1, characterized in that: The pile pipe section (2) is made of multiple welded sections.

3. The rotary-mounted rock-embedded steel pipe pile according to claim 1, characterized in that: The pile top sleeve male connector (1) is a standard part that matches the rotary pile machine and is machined by turning and boring.

4. The rotary-mounted rock-embedded steel pipe pile according to claim 1, characterized in that: The wear-resistant body is formed by welding with wear-resistant welding rods.

5. The rotary-mounted rock-embedded steel pipe pile according to claim 4, characterized in that: The wear-resistant welding electrode mentioned is the LQ605 type welding electrode.

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