A sensor deployment process on a PHC pipe pile and a steel pipe pile spliced ​​pile

Abstract

The present invention discloses a sensor arrangement process on a spliced ​​pile of a PHC pipe pile and a steel pipe pile, comprising the following steps: after the steel pipe pile is manufactured, a surface sensor is installed on the outer surface of the steel pipe pile near the top of the steel pipe pile, the middle of the steel pipe pile body, the place where the geological conditions change, and the top of the steel pipe pile; when the PHC pipe pile is prefabricated, an embedded sensor is installed in the PHC pipe pile near the bottom flange of the PHC pipe pile, the middle of the PHC pipe pile body, the place where the geological conditions change, and the top of the PHC pipe pile, and the embedded sensor is tied to a steel strand in the PHC pipe pile with a cable tie; after the top surface of the steel pipe pile and the splicing surface of the bottom flange of the PHC pipe pile are welded to form an integral spliced ​​pile, the ends of the signal lines on all the surface sensors on the steel pipe pile are welded to the ends of the signal lines of the embedded sensors. The present invention has the advantages of simple process, convenient operation, high efficiency and speed, reliable and stable, high measurement accuracy and survival rate, etc.

Description

Technical Field

[0001] The invention relates to a process for arranging sensors on a spliced ​​pile of a PHC pipe pile and a steel pipe pile. Background Art

[0002] In the field of civil engineering, the spliced ​​composite structure of prestressed high-strength concrete (PHC) pipe piles and steel pipe piles has been widely used in the construction of infrastructure such as bridges, ports, and high-rise buildings due to its excellent bearing capacity and adaptability. PHC pipe piles have become an indispensable part of deep foundation engineering with their high strength, high stability and good penetration; while steel pipe piles have shown unique advantages under specific geological conditions and engineering requirements with their good ductility and corrosion resistance. Therefore, the reasonable splicing combination of PHC pipe piles and steel pipe piles to form spliced ​​piles can give full play to the advantages of the two pile types and meet complex and changing engineering needs.

[0003] However, during the use of spliced ​​piles, monitoring their stress state and deformation becomes the key to ensuring the safety and stability of the structure. Traditional monitoring methods often rely on manual monitoring and empirical judgment, and have problems such as low monitoring accuracy and poor real-time performance, which makes it difficult to meet the high standards of structural safety performance in modern engineering.

[0004] In the prior art, the installation and deployment process of sensors for pile foundations has been studied, but most of them are for a single pile type, and there are problems such as complex installation, high cost, and unsatisfactory monitoring effect. Especially in the application scenario of PHC pipe piles and steel pipe piles, due to the complex pile structure and diverse stress states of the spliced ​​piles, the traditional sensor installation and deployment process is difficult to apply. Therefore, there is an urgent need for a sensor installation and deployment process for the spliced ​​piles of PHC pipe piles and steel pipe piles to improve monitoring accuracy and real-time performance and reduce installation costs and difficulty. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a sensor deployment process on a PHC pipe pile and a steel pipe pile spliced ​​pile, which has the advantages of simple process, convenient operation, high efficiency and speed, reliability and stability, high measurement accuracy and survival rate.

[0006] The object of the present invention is achieved by: a process for laying out sensors on a spliced ​​pile of a PHC pipe pile and a steel pipe pile, including a process for installing sensors on a steel pipe pile, a process for installing sensors on a PHC pipe pile, and a process for laying out sensor lines after the steel pipe pile and the PHC pipe pile are spliced;

[0007] The installation process of the sensor on the steel pipe pile includes the following steps:

[0008] S11, after the steel pipe pile is manufactured, a surface sensor is installed on the outer surface of the steel pipe pile at 0.3 to 1 m near the top of the steel pipe pile, in the middle of the steel pipe pile body, at the place where the geological conditions change, and at the top of the steel pipe pile; first prepare a sensor simulation rod, the size of which is the same as that of the surface sensor to be installed; first install the two ends of the sensor simulation rod on a sensor base respectively, and then weld the two sensor bases to the outer surface of the steel pipe pile; after the weld is cooled, remove the sensor simulation rod from the two sensor bases, and assemble the surface sensor on the two sensor bases to form a sensor pre-assembled component;

[0009] S12, covering the sensor pre-assembled component with a sensor protection box, and welding the sensor protection box to the outer surface of the steel pipe pile, and opening a wire outlet hole on the end plate of the sensor protection box at one end facing the top of the steel pipe pile;

[0010] S13, welding a line protection channel steel on the outer surface of the steel pipe pile from the end plate of each sensor protection box facing the top of the steel pipe pile to the top of the steel pipe pile, so that the signal line of the surface sensor is led out from the outlet hole on each sensor protection box and buried in the corresponding line protection channel steel;

[0011] The installation process of the sensor on the PHC pile includes the following steps:

[0012] S21, when prefabricating the PHC pile, install an embedded sensor in the PHC pile at 0.3 to 1 m near the bottom flange of the PHC pile, in the middle of the PHC pile body, at the place where the geological conditions change, and at the top of the PHC pile, and tie the embedded sensor to a steel strand in the PHC pile with a cable tie;

[0013] S22, welding a line protection box at the joint on the top surface of the bottom flange of the PHC pile, respectively opening a lead hole coaxial with an anchor hole on the bottom flange of the pile on the end plates at both ends of the line protection box at the joint, so that the steel strand passes through the lead hole through the line protection box at the joint; collecting the signal line of the embedded sensor in the PHC pile into the line protection box at the joint through the lead hole of the line protection box at the joint, and then filling the line protection box at the joint with foam glue;

[0014] S23, two steel bars are welded to the steel strands in the PHC pile in a cross shape at a position 1 to 1.5 m from the top of the PHC pile to form a cross-shaped support frame, a main line protection box is welded to the top surface of the cross-shaped support frame, and the signal main lead lines of the embedded sensors in the PHC pile are collected in the main line protection box, and then the main line protection box is filled with foam glue;

[0015] S24, after the prefabrication of the PHC pile is completed, the main line protection box is first cut open, the foam glue in the main line protection box is cleaned, and then the signal main lead wire in the main line protection box is led out through the exhaust hole on the PHC pile;

[0016] The process of laying out the sensor line after the steel pipe pile and the PHC pipe pile are spliced ​​includes the following steps:

[0017] S31, after the top surface of the steel pipe pile and the splicing surface of the pile bottom flange of the PHC pipe pile are welded to form an integral spliced ​​pile, the line protection box at the splicing position is first cut open, and then the signal line of the embedded sensor is passed through the anchor hole on the corresponding pile bottom flange toward one end of the steel pipe pile;

[0018] S32, firstly weld the ends of the signal lines on all the surface sensors on the steel pipe pile with the ends of the signal lines of the embedded sensors, then wrap the welding sections of the ends with electrical tape for protection, then weld angle steels covering the welding sections of the ends on the outer surface of the top of the steel pipe pile, and fill the angle steels with foam glue;

[0019] S33, clean the foam glue in the line protection box at the joint, and then pour high-strength concrete into the line protection box at the joint to seal it.

[0020] In the above-mentioned process for arranging sensors on the spliced ​​pile of the PHC pipe pile and the steel pipe pile, when performing step S11, the weld between the sensor base and the outer surface of the steel pipe pile is limited to the bottom of both sides of the sensor base.

[0021] In the above-mentioned process for arranging sensors on the spliced ​​piles of PHC pipe piles and steel pipe piles, before performing step S31, the surface sensors on the steel pipe piles are coated with high temperature resistant and fireproof materials.

[0022] The sensor deployment process on the spliced ​​pile of the PHC pipe pile and the steel pipe pile of the present invention has the following characteristics: simple process, convenient operation, high efficiency and speed, reliability and stability, high measurement accuracy and survival rate, low cost, saving manpower, material resources and time, and can realize real-time monitoring of the stress state and deformation of the spliced ​​pile, which has important engineering significance and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural schematic diagram of a steel pipe pile after step S11 of the arrangement process of the present invention;

[0024] Figure 2 is another structural schematic diagram of a steel pipe pile after performing step S11 of the arrangement process of the present invention;

[0025] Figure 3 is a schematic structural diagram of a PHC pile after performing step S22 of the arrangement process of the present invention;

[0026] Figure 4 is a cross-sectional view of a PHC pile after performing step S23 of the arrangement process of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the spliced ​​piles after step S33 of the laying process of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] See also Figures 1 to 5 The arrangement process of the sensor on the spliced ​​pile of the PHC pipe pile and the steel pipe pile of the present invention is carried out simultaneously with the production of the PHC pipe pile and the steel pipe pile; the arrangement process of the present invention includes the installation process of the sensor on the steel pipe pile, the installation process of the sensor on the PHC pipe pile, and the arrangement process of the sensor line after the steel pipe pile and the PHC pipe pile are spliced;

[0030] The installation process of the sensor on the steel pipe pile includes the following steps:

[0031] S11, after the steel pipe pile is made, surface sensors are installed on the outer surface of the steel pipe pile at 0.3 to 1 m near the top of the steel pipe pile, in the middle of the steel pipe pile body, at the place where the geological conditions change, and at the top of the steel pipe pile to obtain more comprehensive monitoring data; first prepare a sensor simulation rod, the size of which is the same as that of the surface sensor 1A to be installed; first install the two ends of the sensor simulation rod on a sensor base 10 respectively, and then weld the two sensor bases 10 to the outer surface of the steel pipe pile 100, and the welds 11 between the sensor base 10 and the outer surface of the steel pipe pile 100 are limited to the bottom of both sides of the sensor base 10, and welding is not allowed at other parts; after the weld is cooled, the sensor simulation rod is removed from the two sensor bases 10, and the surface sensor 1A is assembled on the two sensor bases 10 to form a sensor pre-assembled component;

[0032] S12, covering the sensor pre-assembled component with a sensor protection box 3, and welding the sensor protection box 3 to the outer surface of the steel pipe pile 100, and opening a wire outlet hole 30 on the end plate of the sensor protection box 3 at one end facing the top of the steel pipe pile;

[0033] S13, welding a line protection channel steel 4 on the outer surface of the steel pipe pile 100 from the end plate of each sensor protection box 3 facing the top of the steel pipe pile to the top of the steel pipe pile, so that the signal line 10 of each surface sensor 1A is led out from the outlet hole 30 on the sensor protection box 3 and buried in the corresponding line protection channel steel 4;

[0034] The installation process of the sensor on the PHC pile includes the following steps:

[0035] S21, when prefabricating the PHC pile 200, install an embedded sensor 2A in the PHC pile at 0.3 to 1 m from the top surface of the pile bottom flange 21 close to the PHC pile 200, in the middle of the PHC pile body, at the place where the geological conditions change, and at the top of the PHC pile to obtain more comprehensive monitoring data, and use a cable tie 2 to tie the embedded sensor 2A to a steel strand 22 in the PHC pile 200. When tying the embedded sensor 2A, try to ensure that it is below the steel strand 22 to prevent damage to the embedded sensor 2A when prefabricating the PHC pile 200;

[0036] S22, welding the line protection box 6 at the joint on the top surface of the pile bottom flange 21 of the PHC pile 200 to ensure that the sensor line can be prevented from being directly exposed to adverse factors such as water, dust, extreme temperature or strong electromagnetic interference; a lead-in hole coaxial with an anchor hole on the pile bottom flange 21 is respectively opened on the end plates at both ends of the line protection box 6 at the joint, so that the steel strand 22 passes through the lead-in hole through the line protection box 6 at the joint; the signal line 20 of the embedded sensor 2A in the PHC pile 200 is collected into the line protection box 6 at the joint through the lead-in hole of the line protection box 6 at the joint, and then the line protection box 6 at the joint is filled with foam glue for waterproofing;

[0037] S23, two steel bars are welded to the steel strands 22 in the PHC pile in a cross shape at a position 1 to 1.5 m from the top of the PHC pile to form a cross support frame 70, a main line protection box 7 is welded to the top surface of the cross support frame 70, and the signal main lead lines of the embedded sensors 2A in the PHC pile 200 are collected in the main line protection box 7, and then foam glue is filled into the main line protection box 7 to prevent the line from being damaged;

[0038] S24, after the prefabrication of the PHC pile 200 is completed, the main line protection box 7 is cut open, the foam glue in the main line protection box 7 is cleaned, and then the signal main lead wire in the main line protection box 7 is led out through the exhaust hole 23 on the PHC pile;

[0039] The process of laying out the sensor line after the steel pipe pile and the PHC pipe pile are spliced ​​includes the following steps:

[0040] S31, using high temperature resistant and fireproof materials to cover the sensor protection shell on the steel pipe pile 100 to prevent the surface sensor 1A from being damaged by high temperature, and then welding the top surface of the steel pipe pile 100 and the splicing surface of the pile bottom flange 21 of the PHC pipe pile 200 to form an integral spliced ​​pile, and then cut the line protection box 6 at the splicing point, and then pass the signal line of the embedded sensor 1B through the corresponding anchor hole on the pile bottom flange 21 toward one end of the steel pipe pile 100;

[0041] S32, first weld the ends of the signal lines 10 on all the surface sensors 1A on the steel pipe pile 100 with the ends of the signal lines of the embedded sensors 2A, then wrap the end welding section 2B with electrical tape for protection, then weld an angle steel 8 covering the end welding section 2B on the outer surface of the top of the steel pipe pile, and fill the angle steel 8 with foam glue for waterproofing;

[0042] S33, cleaning the foam glue in the line protection box 6 at the joint, and then pouring high-strength concrete into the line protection box 6 at the joint for sealing, so as to ensure the strength of the PHC pile 200.

[0043] The sensor installation and deployment process on the spliced ​​pile of PHC pipe pile and steel pipe pile of the present invention adopts fiber optic grating sensors as the surface sensor and embedded sensor. The device has simple structure, simple and convenient operation, reliability and stability, high measurement accuracy and survival rate, low cost, saving manpower, material resources and time, and can realize real-time monitoring of the stress state and deformation of the spliced ​​pile, which has important engineering significance and application value.

[0044] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A process for laying out sensors on a spliced ​​pile of a PHC pipe pile and a steel pipe pile, comprising a process for installing sensors on a steel pipe pile, a process for installing sensors on a PHC pipe pile, and a process for laying out sensor lines after the steel pipe pile and the PHC pipe pile are spliced; characterized in that: The installation process of the sensor on the steel pipe pile includes the following steps: S11, after the steel pipe pile is manufactured, a surface sensor is installed on the outer surface of the steel pipe pile at 0.3 to 1 m near the top of the steel pipe pile, in the middle of the steel pipe pile body, at the place where the geological conditions change, and at the top of the steel pipe pile; first prepare a sensor simulation rod, the size of which is the same as that of the surface sensor to be installed; first install the two ends of the sensor simulation rod on a sensor base respectively, and then weld the two sensor bases to the outer surface of the steel pipe pile; after the weld is cooled, remove the sensor simulation rod from the two sensor bases, and assemble the surface sensor on the two sensor bases to form a sensor pre-assembled component; S12, covering the sensor pre-assembled component with a sensor protection box, and welding the sensor protection box to the outer surface of the steel pipe pile, and opening a wire outlet hole on the end plate of the sensor protection box at one end facing the top of the steel pipe pile; S13, welding a line protection channel steel on the outer surface of the steel pipe pile from the end plate of each sensor protection box facing the top of the steel pipe pile to the top of the steel pipe pile, so that the signal line of the surface sensor is led out from the outlet hole on each sensor protection box and buried in the corresponding line protection channel steel; The installation process of the sensor on the PHC pile includes the following steps: S21, when prefabricating the PHC pile, install an embedded sensor in the PHC pile at 0.3 to 1 m near the bottom flange of the PHC pile, in the middle of the PHC pile body, at the place where the geological conditions change, and at the top of the PHC pile, and tie the embedded sensor to a steel strand in the PHC pile with a cable tie; S22, welding a line protection box at the joint on the top surface of the bottom flange of the PHC pile, respectively opening a lead hole coaxial with an anchor hole on the bottom flange of the pile on the end plates at both ends of the line protection box at the joint, so that the steel strand passes through the lead hole through the line protection box at the joint; collecting the signal line of the embedded sensor in the PHC pile into the line protection box at the joint through the lead hole of the line protection box at the joint, and then filling the line protection box at the joint with foam glue; S23, two steel bars are welded to the steel strands in the PHC pile in a cross shape at a position 1 to 1.5 m from the top of the PHC pile to form a cross-shaped support frame, a main line protection box is welded to the top surface of the cross-shaped support frame, and the signal main lead lines of the embedded sensors in the PHC pile are collected in the main line protection box, and then the main line protection box is filled with foam glue; S24, after the prefabrication of the PHC pile is completed, the main line protection box is first cut open, the foam glue in the main line protection box is cleaned, and then the signal main lead wire in the main line protection box is led out through the exhaust hole on the PHC pile; The process of laying out the sensor line after the steel pipe pile and the PHC pipe pile are spliced ​​includes the following steps: S31, after the top surface of the steel pipe pile and the splicing surface of the pile bottom flange of the PHC pipe pile are welded to form an integral spliced ​​pile, the line protection box at the splicing position is first cut open, and then the signal line of the embedded sensor is passed through the anchor hole on the corresponding pile bottom flange toward one end of the steel pipe pile; S32, firstly weld the ends of the signal lines on all the surface sensors on the steel pipe pile with the ends of the signal lines of the embedded sensors, then wrap the welding sections of the ends with electrical tape for protection, then weld angle steels covering the welding sections of the ends on the outer surface of the top of the steel pipe pile, and fill the angle steels with foam glue; S33, clean the foam glue in the line protection box at the joint, and then pour high-strength concrete into the line protection box at the joint to seal it.

2. The sensor arrangement process on the PHC pipe pile and steel pipe pile splicing pile according to claim 1 is characterized in that: When performing step S11, the weld between the sensor base and the outer surface of the steel pipe pile is limited to the bottom of both sides of the sensor base.

3. The sensor arrangement process on the spliced ​​pile of PHC pipe pile and steel pipe pile according to claim 1 is characterized in that: Before performing step S31, the surface sensor on the steel pipe pile is coated with high temperature resistant and fireproof materials.

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