A reinforced concrete pipe pile

Abstract

The utility model relates to the field of building construction technology discloses a kind of skeleton reinforced concrete pipe pile. It includes outer tube and the inner fixed tube coaxially nested in its inside, and it is provided with reinforcing assembly between the two, and outer tube outer wall is equipped with stabilizing mechanism. Reinforcing assembly includes the fixed ring welded in outer tube inner wall and the reinforcing screw rod threaded on it, and the end portion of screw rod abuts inner fixed tube outer wall to realize radial fastening, and it is also provided with the cross support frame with outer spring fixed ring inside. Stabilizing mechanism is fixed in outer tube outside through connecting ring, and is anchored into soil layer using rotatable adjusting connecting rod support and ground nail with helical blade. The utility model realizes the rigid locking of inner and outer pipe body and skeleton enhancement through reinforcing assembly, and realizes adaptive auxiliary anchoring under complex terrain using stabilizing mechanism, effectively solve the problem that double-layer pipe pile connection is loose and verticality is difficult to control in initial construction.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a reinforced concrete pipe pile with a skeleton. Background Technology

[0002] Concrete pipe piles are important foundation load-bearing components in building construction, and their structural strength and stability are directly related to the safety of the superstructure. In order to cope with increasingly complex geological conditions and high load-bearing capacity requirements, composite pipe pile structures with double inner and outer pipe walls or built-in steel frames are often used in engineering to improve the bending, shear and compressive strength of the pile body.

[0003] However, in existing double-layer or composite pipe pile technologies, there is often a lack of efficient and rigid mechanical connection mechanisms between the inner and outer layers. Typically, the inner and outer pipes are simply joined together or bonded together with infilled concrete. This connection method makes it difficult to accurately ensure the coaxiality of the inner and outer pipes during the prefabrication and assembly stage. Furthermore, when the pipe pile is subjected to lateral compression or strong bending moments, the inner and outer layers are prone to relative displacement or peeling, failing to form an effective overall load-bearing skeleton, thus greatly limiting the ultimate bearing capacity of the pipe pile.

[0004] Furthermore, in the initial stages of pipe pile installation, especially in shallow foundations or construction sites with significant ground undulations, the outer walls of existing pipe piles are typically quite smooth, lacking auxiliary anchoring structures capable of adapting to terrain adjustments. This makes the pipe piles highly susceptible to tilting due to uneven ground or construction vibrations before they are fully embedded and fixed in the soil, resulting in excessive deviations in pile verticality. This not only affects construction quality but also requires substantial manpower and resources for correction and temporary support.

[0005] Therefore, this utility model proposes a reinforced concrete pipe pile to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a reinforced concrete pipe pile with a skeleton, which aims to improve the problems of insufficient connection strength between the inner and outer structural layers during the prefabrication process of concrete pipe piles and the lack of an adaptive auxiliary anchoring adjustment mechanism in shallow foundation construction, which makes it difficult to control the verticality.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a reinforced concrete pipe pile with a skeleton, comprising: an outer pipe, and an inner fixing pipe nested inside the outer pipe; a reinforcing component disposed between the outer pipe and the inner fixing pipe; and a stabilizing mechanism installed on the outer wall of the outer pipe.

[0008] The reinforcing component has a rigid locking structure including a fixing ring and a reinforcing screw. The fixing ring is sleeved on the outer wall of the inner fixing tube, and the reinforcing screw passes through the fixing ring.

[0009] Furthermore, the reinforcing component, the stabilizing mechanism, the outer tube, and the inner fixing tube are combined through a specific mechanical connection method: the outer edge of the fixing ring is fixedly connected to the inner wall of the outer tube, and the end of the reinforcing screw abuts against the outer wall of the inner fixing tube to achieve radial fastening; the connecting ring of the stabilizing mechanism is fixedly sleeved on the outer wall of the outer tube and is connected to a ground nail for anchoring the foundation through an intermediate connecting component.

[0010] Preferably, the side wall of the fixing ring is provided with a threaded through hole for the reinforcing screw to be screwed in, and the reinforcing screw extends radially along the outer tube.

[0011] Preferably, the reinforcing component further includes cross support frames, which are arranged in a cross shape. The ends of the cross support frames are welded and fixed to the side walls of the fixing rings, and the cross support frames are connected between the opposite fixing rings in the same horizontal plane.

[0012] Preferably, the reinforcing component further includes an outer spring retaining ring, which is sleeved on the cross intersection of the cross support frame and has a spiral structure wrapped around the outer surface of the cross support frame.

[0013] Preferably, the stabilizing mechanism further includes a rotating frame and a connecting rod support. The rotating frame is fixedly installed on the outer surface of the connecting ring, and one end of the connecting rod support is rotatably connected to the rotating frame via a rotating shaft.

[0014] Preferably, the stabilizing mechanism further includes a limiting block, which is fixedly welded to the side wall of the connecting rod support near the rotating frame. The limiting block is used to limit the rotation angle of the connecting rod support relative to the rotating frame.

[0015] Preferably, the connecting rod support has a groove extending along its length, and the stabilizing mechanism further includes a rotating rod that passes through the groove and slides with the connecting rod support. The rotating rod is capable of moving and rotating along the axial direction of the connecting rod support.

[0016] Preferably, the ground nail is fixedly connected to the end of the rotating rod away from the supporting connecting rod, and the surface of the ground nail is provided with helical blades. The rotation of the rotating rod is used to drive the ground nail to rotate into the foundation soil layer.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problems of loose connection between the inner and outer structures and difficulty in accurately controlling coaxiality in the prefabrication process of existing double-layer concrete pipe piles by setting a reinforcing component consisting of a fixing ring, a reinforcing screw and a cross support frame between the inner and outer pipes. The mechanical connection method of welding the fixing ring to the inner wall of the outer pipe and radially abutting the outer wall of the inner pipe is used. This achieves the technical effects of eliminating assembly gaps, realizing rigid locking of the inner and outer pipes, and greatly improving the overall compressive and bending strength of the pipe pile.

[0018] 2. This utility model solves the problems of insufficient gripping force and poor seismic ductility between the traditional smooth metal frame and the filling concrete by fitting a spiral-shaped outer spring fixing ring at the node of the cross support frame. It achieves the technical effect of increasing the contact area between the frame and the concrete by using the spiral structure, effectively dispersing stress and limiting the expansion of micro-cracks inside the concrete when the pipe pile is subjected to impact load. Attached Figure Description

[0019] Figure 1 This is a perspective view of a reinforced concrete pipe pile with a skeleton proposed in this utility model. Figure 2 This is a schematic diagram of the outer pipe of a reinforced concrete pipe pile according to the present invention. Figure 3 This is a schematic diagram of a stabilization mechanism for a reinforced concrete pipe pile according to the present invention. Figure 4 This is a schematic diagram of a reinforcement component for a skeleton-reinforced concrete pipe pile proposed in this utility model.

[0020] Legend: 1. Outer tube; 2. Inner fixed tube; 3. Reinforcing component; 301. Fixing ring; 302. Reinforcing screw; 303. Cross support frame; 304. Outer spring fixing ring; 4. Stabilizing mechanism; 401. Connecting ring; 402. Rotating frame; 403. Connecting rod support; 404. Ground nail; 405. Limiting block; 406. Rotating rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-4The present invention provides an embodiment of a reinforced concrete pipe pile, comprising an outer pipe 1 and an inner fixing pipe 2 coaxially nested inside the outer pipe 1. The outer pipe 1 serves as the outermost load-bearing structure and protective shell of the pipe pile, and its material is usually high-strength steel or precast concrete composite material. The inner fixing pipe 2 is located at the central axis of the outer pipe 1, and the diameter difference between the two forms an annular cavity inside the pipe pile. This cavity provides a spatial basis for subsequent filling with concrete or installation of reinforcement structures.

[0023] To improve the overall bending resistance and structural rigidity of the pipe pile, a reinforcing component 3 is installed between the outer pipe 1 and the inner fixed pipe 2. At the same time, to enhance the foundation anchoring stability of the pipe pile in the early stage of construction, a stabilizing mechanism 4 is installed on the outer side wall of the outer pipe 1. The reinforcing component 3 is located in the cavity between the inner and outer pipes and locks the outer pipe 1 and the inner fixed pipe 2 into one unit through mechanical connection. The stabilizing mechanism 4 extends outward to grip the foundation soil layer.

[0024] The reinforcing component 3, as the internal core support structure, includes multiple fixing rings 301 spaced apart along the axial direction of the pipe pile. The outer edge of the fixing ring 301 is directly fixed to the inner wall of the outer pipe 1 by welding, making the fixing ring 301 part of the inner wall of the outer pipe 1, which can effectively transmit radial loads. The side wall of the fixing ring 301 is provided with a threaded through hole that penetrates its wall thickness. A reinforcing screw 302 is installed in the threaded through hole. The reinforcing screw 302 is connected to the threaded through hole by thread. The length of the reinforcing screw 302 extends radially along the outer pipe 1. The end of the reinforcing screw 302 passes through the fixing ring 301 and directly abuts against the outer wall surface of the inner fixing pipe 2. By rotating the reinforcing screw 302, it is pushed towards the center. The radial top pressure applied to the inner fixing pipe 2 by the screw end eliminates the assembly gap between the inner fixing pipe 2 and the outer pipe 1, realizing the rigid fastening and coaxial positioning of the inner and outer pipes in the radial direction. The cross support frame 303 is arranged in a cross shape and is located in the plane where the fixing ring 301 is located. The cross support frame 303 is composed of two metal rods that cross each other perpendicularly. The four ends of the cross support frame 303 are directly fixed to the inner wall of the fixing ring 301 by welding. The cross support frame 303 not only connects the fixing ring 301 in the same cross section, but also transmits the radial pressure on the fixing ring 301 to the center of the pipe pile and balances it with each other, thereby supporting the inner cavity of the outer pipe 1 and preventing the outer pipe 1 from deforming when subjected to external pressure.

[0025] Meanwhile, in order to enhance the bond between the internal skeleton and the subsequent filling concrete and to provide a certain degree of seismic ductility, an outer spring fixing ring 304 is installed on the cross support frame 303. The outer spring fixing ring 304 is sleeved at the cross intersection of the cross support frame 303. The outer spring fixing ring 304 has a spiral elastic metal structure. The inner diameter of the outer spring fixing ring 304 is adapted to the outer diameter of the node of the cross support frame 303. The two are connected by an interference fit. The outer spring fixing ring 304 is spirally wrapped around the outer surface of the cross support frame 303. After the concrete is poured, this spiral structure can increase the contact area with the concrete like a special-shaped steel bar. When the pipe pile is subjected to impact load, the geometric characteristics of the spiral steel bar can be used to disperse stress and limit the expansion of microcracks. In a preferred embodiment, in order to achieve auxiliary anchoring and verticality adjustment of the pipe pile during shallow foundation construction, the stabilizing mechanism 4 includes a connecting ring 401 fixedly sleeved on the outer wall of the outer pipe 1. The connecting ring 401 serves as the mounting base for the entire stabilizing mechanism 4. A rotating frame 402 is fixedly installed on the outer surface of the connecting ring 401 by welding or bolting. The rotating frame 402 is a frame structure. A connecting rod support 403 is connected to the rotating frame 402. One end of the connecting rod support 403 is rotatably connected to the rotating frame 402 through a rotating shaft, so that the connecting rod support 403 can freely adjust its tilt angle around the rotating frame 402 in the vertical plane, thereby adapting to different terrain slopes or construction angle requirements.

[0026] As a further preferred embodiment, in order to limit the swing amplitude of the connecting rod support 403 during the adjustment process and prevent it from drooping or rising excessively and affecting stability, the stabilizing mechanism 4 also includes a limiting block 405. The limiting block 405 is fixedly welded to the side wall of the connecting rod support 403 near the rotating frame 402. When the connecting rod support 403 rotates to a preset angle, the limiting block 405 will directly abut against the surface of the rotating frame 402, thereby limiting the connecting rod support 403 from continuing to rotate through mechanical blocking.

[0027] In another preferred embodiment, to achieve flexible adjustment of the insertion position and depth of the ground nail 404, a groove extending along the length of the connecting rod support 403 is provided on the connecting rod support 403. The stabilizing mechanism 4 is also equipped with a rotating rod 406, which passes through the groove and forms a sliding and rotational engagement with the connecting rod support 403. The rotating rod 406 can move along the axis of the connecting rod support 403 within the groove, and can also rotate around its own axis. The ground nail 404 is coaxially fixedly connected to the end of the rotating rod 406 away from the connecting rod support 403. The ground nail 404 rotates synchronously with the rotation of the rotating rod 406. The outer surface of the ground nail 404 is provided with helical blades. This structure allows the ground nail 404 to be screwed into the foundation soil layer like a screw under the action of rotational force. The top of the rotating rod 406 is provided with a handle or drive head for applying rotational torque, which is convenient for construction personnel to operate.

[0028] Working principle: In the prefabrication and assembly stage of the pipe pile, the inner fixing pipe 2 is first placed inside the outer pipe 1 and kept axially aligned. Using the fixing ring 301 pre-welded on the inner wall of the outer pipe 1 as a support base, the construction personnel rotate the reinforcing screw 302 with a tool, so that the reinforcing screw 302 is pushed towards the center in the threaded through hole until the end of the reinforcing screw 302 tightly abuts against the outer wall of the inner fixing pipe 2. The resulting radial top pressure eliminates the gap between the inner and outer pipes, locking the inner fixing pipe 2 and the outer pipe 1 into a rigid whole. At the same time, the cross support frame 303 forms a cross-shaped rigid skeleton inside the pipe cavity, which can resist the radial deformation caused by external soil pressure. The outer spring fixing ring 304, which is fitted at the cross node, increases the bonding area with the concrete after the concrete is poured, and helps to disperse stress when the pipe pile is under force.

[0029] During the positioning and auxiliary anchoring stage of pipe pile construction, after the pipe pile is hoisted to the designated position, the attitude is adjusted and temporarily fixed by the stabilizing mechanism 4. According to the undulation of the site terrain, the construction personnel rotate the connecting rod support 403 around the rotating frame 402 to adjust the angle so that the connecting rod support 403 reaches a suitable support angle. During this process, the limiting block 405 plays a role in preventing the connecting rod support 403 from failing due to excessive rotation angle.

[0030] After the angle is determined, the operator holds the drive head at the top of the rotating rod 406 and applies a rotational torque. The rotating rod 406 drives the ground nail 404 at the bottom to rotate. The spiral blades on the surface of the ground nail 404 cut into the foundation soil layer, firmly anchoring the ground nail 404 into the ground. At the same time, by utilizing the sliding fit between the rotating rod 406 and the sliding groove on the connecting rod support 403, the horizontal distance or the depth of penetration between the ground nail 404 and the outer pipe 1 is adjusted. Finally, through the coordinated action of multiple sets of stabilizing mechanisms 4, the outer pipe 1 is locked vertically or at a predetermined angle on the ground to prevent the pipe pile from tilting due to subsequent construction vibrations.

Claims

1. A reinforced concrete pipe pile with a skeleton, comprising: The outer tube (1) and the inner fixed tube (2) coaxially nested inside the outer tube (1); Its features are, The reinforced concrete pipe pile also includes a reinforcing component (3) disposed between the outer pipe (1) and the inner fixed pipe (2), and a stabilizing mechanism (4) installed on the outer wall of the outer pipe (1). The reinforcing component (3) includes a plurality of axially distributed fixing rings (301). The outer wall of the fixing ring (301) is welded and fixed to the inner wall of the outer tube (1). The fixing ring (301) has a threaded through hole penetrating its side wall. The reinforcing component (3) also includes a reinforcing screw (302). The reinforcing screw (302) is threadedly connected to the threaded through hole and extends inward. The end of the reinforcing screw (302) abuts against the outer wall of the inner fixing tube (2) to achieve radial fastening between the inner fixing tube (2) and the outer tube (1). The stabilizing mechanism (4) includes a connecting ring (401) fixedly sleeved on the outer wall of the outer tube (1) and a rotating frame (402) disposed on the side of the connecting ring (401). A connecting rod support (403) for anchoring the foundation is connected to the rotating frame (402).

2. The reinforced concrete pipe pile according to claim 1, characterized in that, The reinforcing component (3) also includes a cross support frame (303), which is distributed in a cross shape in the plane where the fixing ring (301) is located. The end of the cross support frame (303) is welded and fixed to the inner wall of the fixing ring (301). The cross support frame (303) is used to connect the fixing ring (301) in the same cross section and support the inner cavity of the outer tube (1).

3. The reinforced concrete pipe pile according to claim 2, characterized in that, The reinforcing component (3) also includes an outer spring retaining ring (304), which is sleeved on the cross intersection of the cross support frame (303). The outer spring retaining ring (304) has a spiral elastic structure, and the inner diameter of the outer spring retaining ring (304) is interference-fitted with the outer diameter of the node of the cross support frame (303).

4. The reinforced concrete pipe pile according to claim 1, characterized in that, The stabilizing mechanism (4) further includes a connecting rod support (403), one end of which is rotatably connected to the rotating frame (402) via a pivot. The connecting rod support (403) can adjust the tilt angle around the rotating frame (402) in the vertical plane.

5. The reinforced concrete pipe pile according to claim 4, characterized in that, The stabilizing mechanism (4) further includes a limiting block (405), which is fixedly disposed on the side wall of the connecting rod support (403) near the rotating frame (402). The limiting block (405) is used to abut against the surface of the rotating frame (402) to limit the rotation range of the connecting rod support (403).

6. The reinforced concrete pipe pile according to claim 4, characterized in that, The connecting rod support (403) has a sliding groove extending along its length. The stabilizing mechanism (4) also includes a rotating rod (406), which passes through the sliding groove and slides and rotates with the connecting rod support (403).

7. The reinforced concrete pipe pile according to claim 6, characterized in that, The ground nail (404) is coaxially fixed to one end of the rotating rod (406) away from the connecting rod support (403). The ground nail (404) is screwed into the foundation soil layer as the rotating rod (406) rotates, and the rotating rod (406) can move along the groove to adjust the penetration depth of the ground nail (404).

8. The reinforced concrete pipe pile according to claim 7, characterized in that, The outer surface of the ground nail (404) is provided with helical blades, and the top end of the rotating rod (406) is provided with a handle or drive head for applying rotational torque.

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