Intelligent positioning and deviation correction construction device for pipe piles of pile-plank subgrade and its construction method

Abstract

The present invention relates to an intelligent positioning and deviation correction construction device for pipe piles of a pile-plank subgrade and a construction method thereof. The device includes pipe piles, a positioning truss, a hoop sleeve, a sleeve connecting rod, a positioning steel plate, a strain gauge and a positioning prism. The positioning truss is fixed on the pipe pile through the hoop sleeve, and the positioning truss and the hoop sleeve are connected by the sleeve connecting rod; the positioning steel plate is arranged at the top of the pipe pile and is connected with the positioning truss. A positioning prism is arranged at the center of the positioning steel plate for positioning the pipe pile; a strain gauge is arranged on the positioning truss. The present invention uses a truss and a hoop structure that are convenient for installation and disassembly to achieve rapid positioning of the pipe pile, improve construction efficiency and reduce the positioning difficulty; limit the pile sinking process through the hoop sleeve, and judge the deviation direction of the pipe pile through real-time strain monitoring, feedback the deviation correction adjustment direction and value, improve the pile sinking accuracy of the pipe pile, ensure the verticality of the pipe pile, reduce the construction difficulty and simplify the construction operation.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and particularly relates to an intelligent positioning and deviation correction construction device and a construction method for pipe piles of a pile - plate subgrade. Background Art

[0002] A pile - plate subgrade is an assembled structure composed of prefabricated slab beams and pipe piles in a factory. Due to advantages such as fast construction speed and less land occupation, it has been increasingly widely used in highway construction in recent years. For the construction of a pile - plate subgrade, the pile driving construction of the precast pipe piles in its lower structure is an important link. The deviation of the pipe pile positioning and the deviation during the pile driving process are key factors affecting the construction quality. Currently, the commonly used hammer - driving method in pipe pile construction has a large vibration of the pile body during the hammer - driving process. Without reasonable limiting and deviation correction measures, it is extremely easy to deviate from the design axis. Summary of the Invention

[0003] The purpose of the present invention is to supplement and optimize the defects existing in the above - mentioned existing technical methods, and provide an intelligent positioning and deviation correction construction device and a construction method for pipe piles of a pile - plate subgrade, which achieve precise positioning through a truss structure and a hoop sleeve, and intelligently correct the deviation by real - time strain monitoring and feedback of deviation information.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] An intelligent positioning and deviation correction construction device for pipe piles of a pile - plate subgrade includes a pipe pile, a positioning truss, a hoop sleeve, a sleeve connecting rod, a positioning steel plate, a strain gauge and a positioning prism. The positioning truss is fixed on the pipe pile through the hoop sleeve to limit the pipe pile during pile driving. The positioning truss and the hoop sleeve are connected by the sleeve connecting rod; the positioning steel plate is arranged at the top of the pipe pile and connected to the positioning truss. A positioning prism is arranged at the center of the positioning steel plate for pipe pile positioning; a strain gauge is arranged on the positioning truss to monitor the pile driving process and feedback the change in the internal force of the truss caused by the deviation of the pipe pile.

[0006] In an embodiment of the present invention, the positioning truss is composed of an upper chord, a lower chord, web members, horizontal bracings and transverse bracings. There are two upper chords, which are arranged in parallel and connected by horizontal bracings. There are two lower chords, which are arranged in parallel and connected by horizontal bracings. The upper chord and the lower chord are connected by web members. The horizontal bracing connecting the two upper chords and the horizontal bracing connecting the two lower chords are connected by transverse bracings.

[0007] In an embodiment of the present invention, the upper chord, the lower chord, the web members, the horizontal bracings and the transverse bracings are connected by bolts to form an integral body.

[0008] In one embodiment of the present invention, the strain gauges are arranged on the upper chord and the lower chord of the positioning truss.

[0009] In one embodiment of the present invention, the hoop casing is composed of two semi-circular steel hoops, four end plates, end plate stiffeners and high-strength bolts; the end plates are connected to both ends of the steel hoops, the end plate stiffeners are arranged between the end plates and the steel hoops, and the two end plates at the same end of the two semi-circular steel hoops are connected by high-strength bolts; the two steel hoops enclose to form a ring for fixing on the pipe pile.

[0010] In one embodiment of the present invention, the end plate and the steel hoop are connected by welding or integrally rolled, bolt holes are vertically formed in the end plate, and the out-of-plane stiffness is improved by the end plate stiffeners. A certain gap is left between the two opposite end plates for pre-tightening of the high-strength bolts and radius adjustment between the steel hoops.

[0011] In one embodiment of the present invention, one end of the casing connecting rod is connected to the steel hoop, and the other end is connected to the positioning truss.

[0012] In one embodiment of the present invention, eight casing connecting rods are connected to the outside of each hoop casing, and the casing connecting rods are arranged diagonally in an X shape in the plane and in a K shape in the elevation.

[0013] In one embodiment of the present invention, the positioning steel plate and the positioning truss are connected by a pin shaft and can be lifted or covered as needed.

[0014] In one embodiment of the present invention, in the initial state, the inner diameter of the hoop casing is slightly larger than the outer diameter of the pipe pile, and the difference ΔR is equal to the allowable deviation of pipe pile positioning.

[0015] The present invention also provides a construction method for the pipe pile intelligent positioning and deviation correction construction device of the pile-plank subgrade, and the pipe pile positioning and pile driving construction are carried out according to the following steps:

[0016] S1. Complete the positioning and pile driving of the first pipe pile according to the designed pipe pile position, then assemble the positioning truss into an integral body and lift it. Coarse positioning of the intelligent deviation correction construction device is completed by sleeving the hoop casing on the first pipe pile and partially tightening the high-strength bolts, and cover the positioning steel plates of all pipe piles;

[0017] S2. Through the positioning prism arranged on the positioning steel plate of the second pipe pile, use a total station to set out so that the position of the positioning prism coincides with the designed position of the second pipe pile. Then tighten the high-strength bolts of the hoop casing of the first pipe pile to the specified pre-tightening force to make its connection with the first pipe pile firm, and then the crane releases the hook to complete the precise positioning and fixing of the intelligent deviation correction construction device;

[0018] S3. Zero the strain gauge readings, lift the positioning steel plate of the second pipe pile, and complete the positioning and pile driving of the second pipe pile through the limiting effect of the second pipe pile hoop casing. During the pile driving process of the pipe pile, continuously monitor the change in the strain gauge readings set on the positioning truss. If there is a deviation exceeding the allowable deviation, the upper chord and lower chord of the positioning truss will be subjected to axial forces or bending moments in the corresponding directions, resulting in differences in the strain gauge readings on different sides. Based on the direction and magnitude of the force, determine the deviation direction of the pipe pile and feedback the direction and magnitude of the deviation correction adjustment. The corresponding internal force calculation formula is

[0019]

[0020]

[0021] In the formula, N is the axial force of the truss section, M is the bending moment of the truss section, A is the cross-sectional area of the truss member, I is the moment of inertia of the truss section against bending, y is the distance from the centroid axis of the section to the edge member, and σ1 and σ2 are the axial stresses equivalently obtained according to the strain gauge readings on different sides, with tension being positive and compression being negative;

[0022] S4. Repeat step S3 until the pile driving construction of the remaining pipe piles is completed.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] (1) Aiming at the problems of inaccurate positioning and difficult deviation limitation in the construction of precast pipe piles for pile-slab subgrade, a pipe pile intelligent positioning and deviation correction construction device and its corresponding construction method are proposed. The truss and hoop structures that are easy to install and disassemble are used to achieve the rapid positioning of pipe piles, improve construction efficiency, and reduce the positioning difficulty;

[0025] (2) The limiting of the pile driving process is realized through the hoop sleeve, and the deviation direction of the pipe pile is judged by real-time strain monitoring, and the direction and magnitude of the deviation correction adjustment are fed back, improving the pile driving accuracy of the pipe pile, ensuring the verticality of the pipe pile, reducing the construction difficulty, and simplifying the construction operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 : The top view structural schematic diagram of the pipe pile intelligent positioning and deviation correction construction device in Embodiment 1 (the positioning steel plate and positioning prism are not shown);

[0027] Figure 2 : The front view structural schematic diagram of the pipe pile intelligent positioning and deviation correction construction device in Embodiment 1 (the hoop casing is not shown);

[0028] Figure 3 : The top view structural schematic diagram of the hoop casing of the pipe pile intelligent positioning and deviation correction construction device in Embodiment 1;

[0029] Figure 4: Schematic front view structure of the clamping sleeve of the intelligent positioning and deviation correction construction device for pipe piles in Embodiment 1;

[0030] Figure 5 : Schematic side view structure of the clamping sleeve of the intelligent positioning and deviation correction construction device for pipe piles in Embodiment 1;

[0031] Figure 6 : Schematic top view structure of the positioning truss of the intelligent positioning and deviation correction construction device for pipe piles in Embodiment 1;

[0032] Figure 7 : Schematic front view structure of the positioning truss of the intelligent positioning and deviation correction construction device for pipe piles in Embodiment 1;

[0033] Figure 8 : Schematic side view structure of the positioning truss of the intelligent positioning and deviation correction construction device for pipe piles in Embodiment 1.

[0034] As shown in the figure by the reference numerals:

[0035] 1. Pipe pile, 2. Positioning truss, 201. Upper chord, 202. Lower chord, 203. Web member, 204. Horizontal bracing, 205. Cross bracing, 3. Clamping sleeve, 301. Steel clamp, 302. End plate, 303. End plate stiffener, 304. High-strength bolt, 4. Sleeve connecting rod, 5. Positioning steel plate, 6. Strain gauge, 7. Positioning prism. Detailed implementation mode

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation mode and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0037] Embodiment

[0038] Referring to Figures 1 to 8 , this embodiment provides an intelligent positioning and deviation correction construction device for pipe piles of a pile-plank subgrade, which is characterized in that it includes a pipe pile 1, a positioning truss 2, a clamping sleeve 3, a sleeve connecting rod 4, a positioning steel plate 5, a strain gauge 6 and a positioning prism 7. The positioning truss 2 is fixed on the pipe pile 1 through the clamping sleeve 3 to realize the limit during the pile driving of the pipe pile 1. The positioning truss 2 and the clamping sleeve 3 are connected by the sleeve connecting rod 4; the positioning steel plate 5 is arranged on the top of the pipe pile 1 and is connected to the positioning truss 2. A positioning prism 7 is arranged at the center of the positioning steel plate 5 for pipe pile positioning; a strain gauge 6 is arranged on the positioning truss 2 for monitoring the pile driving process and feeding back the change of the internal force of the truss caused by the deviation of the pipe pile.

[0039] Further referring to Figures 6 - 8, in this embodiment, the positioning truss 2 is composed of upper chord members 201, lower chord members 202, web members 203, lateral bracings 204 and cross bracings 205. There are two upper chord members 201 which are arranged in parallel and are connected by the lateral bracing 204 between them. There are two lower chord members 202 which are arranged in parallel and are connected by the lateral bracing 204 between them. The upper chord members 201 and the lower chord members 202 are connected by the web members 203. The lateral bracing 204 connecting the two upper chord members 201 and the lateral bracing 204 connecting the two lower chord members 202 are connected by the cross bracing 205. The upper chord members 201, the lower chord members 202, the web members 203, the lateral bracings 204 and the cross bracings 205 are connected by bolts to form an integral whole.

[0040] In this embodiment, the strain gauges 6 are arranged on the upper chord members 201 and the lower chord members 202 of the positioning truss 2.

[0041] Further referring to Figures 3 - 5 , in this embodiment, the hoop sleeve 3 is composed of two semi-circular steel hoops 301, four end plates 302, end plate stiffeners 303 and high-strength bolts 304. The end plates 302 are connected to both ends of the steel hoop 301. The end plate stiffeners 303 are arranged between the end plates 302 and the steel hoop 301. The two end plates 302 at the same end of the two semi-circular steel hoops 301 are connected by high-strength bolts 304. The two steel hoops 301 enclose to form a ring for fixing on the pipe pile 1. The end plates 302 and the steel hoop 301 are connected by welding or integrally rolled. Bolt holes are vertically opened on the end plates 302, and the out-of-plane stiffness is improved by the end plate stiffeners 303. A certain gap is left between two opposite end plates 302 for pre-tightening of the high-strength bolts 304 and radius adjustment between the steel hoops 301.

[0042] In this embodiment, one end of the sleeve connecting rod 4 is connected to the steel hoop 301, and the other end is connected to the positioning truss 2.

[0043] In this embodiment, eight sleeve connecting rods 4 are connected to the outside of each hoop sleeve 3. The sleeve connecting rods 4 are arranged diagonally in an X shape in the plane and in a K shape in the elevation.

[0044] In this embodiment, the positioning steel plate 5 and the positioning truss 2 are connected by a pin shaft and can be lifted or covered as needed.

[0045] In this embodiment, the inner diameter of the hoop sleeve 3 is slightly larger than the outer diameter of the pipe pile 1, and the difference ΔR is equal to the allowable deviation of pipe pile positioning.

[0046] This embodiment also provides a construction method of the pipe pile intelligent positioning and deviation correction construction device for the pile-plank subgrade, and the pipe pile positioning and pile driving construction are carried out according to the following steps:

[0047] S1. Complete the positioning and driving of the first pipe pile according to the designed pipe pile positions. Then assemble the positioning truss into a whole and lift it up. Complete the rough positioning of the intelligent deviation correction construction device by sleeving the hoop casing on the first pipe pile and partially tightening the high-strength bolts, and cover the positioning steel plates of all pipe piles.

[0048] S2. Through the positioning prism set on the positioning steel plate of the second pipe pile, use a total station to set out so that the position of the positioning prism coincides with the designed position of the second pipe pile. Then tighten the high-strength bolts of the hoop casing of the first pipe pile to the specified pre-tightening force to make its connection with the first pipe pile firm. Then the crane releases the hook to complete the precise positioning and fixation of the intelligent deviation correction construction device.

[0049] S3. Zero the strain gauge reading, lift up the positioning steel plate of the second pipe pile, and complete the positioning and driving of the second pipe pile through the limiting effect of the hoop casing of the second pipe pile. During the driving process of the pipe pile, monitor the change of the strain gauge reading set on the positioning truss in real time. If there is a deviation exceeding the allowable deviation, the upper chord and lower chord of the positioning truss will be subjected to axial forces or bending moments in the corresponding directions, resulting in differences in the strain gauge readings on different sides. According to the direction and magnitude of the force, judge the deviation direction of the pipe pile and feedback the direction and value of the deviation correction adjustment. The corresponding internal force calculation formula is

[0050]

[0051]

[0052] In the formula, N is the axial force of the truss section, M is the bending moment of the truss section, A is the cross-sectional area of the truss member, I is the moment of inertia of the truss section about bending, y is the distance from the centroid axis of the section to the edge member, and σ1 and σ2 are the axial stresses equivalently obtained according to the strain gauge readings on different sides, with tension being positive and compression being negative.

[0053] Take Figure 1 Taking the example of three piles arranged horizontally as shown, when constructing the first pipe pile on the left side of the first construction and then the second pipe pile on the left side, and when σ1 is the stress of the upper chord and σ2 is the stress of the lower chord, if N > 0, it indicates that the second pipe pile deviates to the right during the driving process, and vice versa to the left; if M > 0, it indicates that the second pipe pile deviates downward during the driving process, and vice versa upward; the corresponding deviation amount can be calculated by the following formula:

[0054]

[0055]

[0056] In the formula, l0 is the distance from the first pipe pile to the second pipe pile; l1 is the distance from the strain gauge arrangement section to the second pipe pile; E is the elastic modulus of the truss steel.

[0057] S4. Repeat step S3 until the pile driving construction of the remaining pipe piles is completed.

[0058] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention as disclosed should be within the protection scope of the present invention.

Claims

1. An intelligent positioning and deviation correction construction device for pipe piles in a pile - slab subgrade, characterized in that, It includes a pipe pile (1), a positioning truss (2), a hoop casing (3), a casing connecting rod (4), a positioning steel plate (5), a strain gauge (6) and a positioning prism (7). The positioning truss (2) is fixed on the pipe pile (1) through the hoop casing (3) to limit the pipe pile (1) during pile driving. The positioning truss (2) is connected to the hoop casing (3) through the casing connecting rod (4); the positioning steel plate (5) is arranged on the top of the pipe pile (1) and connected to the positioning truss (2). A positioning prism (7) is arranged at the center of the positioning steel plate (5) for pipe pile positioning; a strain gauge (6) is arranged on the positioning truss (2) to monitor the pile driving process and feedback the change of the internal force of the truss caused by the deviation of the pipe pile. The positioning truss (2) is composed of an upper chord (201), a lower chord (202), web members (203), horizontal bracings (204) and cross bracings (205). There are two upper chords (201) which are arranged in parallel. The two upper chords (201) are connected by the horizontal bracings (204). There are two lower chords (202) which are arranged in parallel. The two lower chords (202) are connected by the horizontal bracings (204). The upper chord (201) and the lower chord (202) are connected by the web members (203). The horizontal bracing (204) connecting the two upper chords (201) and the horizontal bracing (204) connecting the two lower chords (202) are connected by the cross bracing (205). The strain gauge (6) is arranged on the upper chord (201) and the lower chord (202) of the positioning truss (2). The hoop casing (3) is composed of two semi-circular steel hoops (301), four end plates (302), end plate stiffeners (303) and high-strength bolts (304); the end plates (302) are connected to both ends of the steel hoop (301). The end plate stiffeners (303) are arranged between the end plates (302) and the steel hoop (301). The two end plates (302) at the same end of the two semi-circular steel hoops (301) are connected by the high-strength bolts (304); the two steel hoops (301) enclose to form a ring for fixing on the pipe pile (1). One end of the casing connecting rod (4) is connected to the steel hoop (301), and the other end is connected to the positioning truss (2). Eight casing connecting rods (4) are connected to the outside of each hoop casing (3). The casing connecting rods (4) are arranged diagonally in an X shape in the plane and in a K shape in the elevation.

2. The pipe pile intelligent positioning and deviation correction construction device for the pile-plank subgrade according to claim 1, characterized in that, The upper chord (201), the lower chord (202), the web members (203), the horizontal bracings (204) and the cross bracings (205) are connected by bolts to form an integral body.

3. The intelligent positioning and deviation correction construction device for pipe piles of the pile-slab subgrade according to claim 1, wherein, The end plate (302) is connected to the steel hoop (301) by welding or integrally rolled. Bolt holes are vertically opened on the end plate (302), and the out-of-plane stiffness is improved by the end plate stiffeners (303). A certain gap is left between the two opposite end plates (302) for the pre-tightening of the high-strength bolts (304) and the radius adjustment between the steel hoops (301).

4. The intelligent positioning and deviation correction construction device for pipe piles of the pile-slab subgrade according to claim 1, characterized in that In the initial state, the inner diameter of the hug hoop sleeve (3) is slightly larger than the outer diameter of the pipe pile (1), and the difference Δ R is equal to the allowable deviation for pipe pile positioning.

5. The construction method of the pipe pile intelligent positioning and deviation correction construction device for the pile-slab subgrade according to claim 1, characterized in that, The pipe pile positioning and pile driving construction are carried out according to the following steps: S1. Complete the positioning and driving of the first pipe pile according to the designed pipe pile position, then assemble the positioning truss into a whole and hoist it. Complete the rough positioning of the intelligent positioning and deviation correction construction device by sleeving the hoop casing on the first pipe pile and partially tightening the high-strength bolts, and cover the positioning steel plates of all pipe piles. S2. Through the positioning prism set on the positioning steel plate of the second pipe pile, use a total station to set out so that the position of the positioning prism coincides with the designed position of the second pipe pile. Then tighten the high-strength bolts of the hoop casing of the first pipe pile to the specified pre-tightening force to make its connection with the first pipe pile firm. Then the crane releases the hook to complete the precise positioning and fixation of the intelligent positioning and deviation correction construction device. S3. Zero the strain gauge reading, lift the positioning steel plate of the second pipe pile, and complete the positioning and driving of the second pipe pile through the limiting effect of the hoop casing of the second pipe pile. During the driving process of the pipe pile, monitor the change of the strain gauge reading set on the positioning truss in real time. If there is a deviation exceeding the allowable deviation, the upper chord and lower chord of the positioning truss will be subjected to axial forces or bending moments in the corresponding directions, resulting in differences in the strain gauge readings on different sides. According to the direction and magnitude of the force, judge the deviation direction of the pipe pile and feedback the direction and value of the deviation correction adjustment. The corresponding internal force calculation formula is In the formula, N is the axial force of the truss section, M is the bending moment of the truss section, A is the cross-sectional area of the truss member, I is the flexural moment of inertia of the truss section, y is the distance from the centroid axis of the section to the edge member, σ 1, σ 2 are the axial stresses equivalently obtained according to the readings of different lateral strain gauges, with tension being positive and compression being negative; S4. Repeat step S3 until the driving construction of the remaining pipe piles is completed.

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