Sensor setting method for monitoring mechanical response of pile body of multi-section prefabricated pipe pile

Abstract

The invention provides a sensor setting method for monitoring mechanical response of a multi-section prefabricated pipe pile body, and belongs to the field of pipe pile mechanical detection.A sensor is arranged on a main reinforcement of a reinforcement cage, a first wire and a second wire are fixed to the main reinforcement, and a remaining wire frame is arranged at the end of the reinforcement cage; temporarily winding the remaining wires of the first wire and the second wire on a remaining wire frame; a residual wire pipe is arranged on the side face of the top end of the steel reinforcement cage which forms the multi-section pipe pile and is located at the topmost end, and residual wires, exceeding the pile top, of the first wire and the second wire of the steel reinforcement cage at the topmost end are temporarily arranged in the residual wire pipe. Through the plastic hose, the thin iron wire, the waterproof gel and other materials, the sensor and the wire connecting part can be effectively protected, and the survival rate of the sensor is remarkably increased; according to the structural characteristics of the multi-section prefabricated pipe pile, a free wire is reserved by welding a residual wire frame and a residual wire pipe, so that effective mechanical response monitoring can be realized in a complex engineering environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tubular pile mechanical detection, and particularly relates to a sensor setting method for monitoring mechanical response of a multi-section prefabricated tubular pile. BACKGROUND

[0002] In recent years, prefabricated tubular piles have been widely used in engineering practice due to their stable and reliable quality, high single-pile bearing capacity, strong adaptability to different geological conditions and pile sinking processes, and fast construction speed. The mechanical response of prefabricated tubular piles during construction and use directly relates to the safety and stability of the project, and therefore, it is of great significance to carry out effective monitoring of the mechanical response of the pile body.

[0003] Traditional pile body response monitoring methods mostly use vibrating wire reinforcement meters and resistance concrete strain gauges and other sensors. These sensors are usually arranged at key positions of the pile body to record pile body stress and strain data during pile sinking and use. However, with the increasing complexity of engineering projects, single-section piles have been difficult to meet construction requirements, and multi-section prefabricated tubular piles have gradually become the mainstream choice. In the process of implementing the present application, the inventors found that the prior art faces the following main problems: (1) Sensor embedding and protection: when embedding sensors in the pile body, how to effectively protect the sensors from damage caused by concrete pouring, vibration and other construction operations, and ensure their long-term stability and data reliability, is a key factor that needs to be considered in design and arrangement. At the same time, multi-section tubular piles need to be assembled and connected on the construction site, and the embedding position and method of the sensors need to ensure that they do not affect the effective connection between pile sections.

[0004] (2) Wire arrangement and connection: multi-section piles usually need to embed longer wires, which increases the difficulty of wire connection. Effectively solving the problem of wire crossing between pile sections and avoiding damage to the wires during pile sinking is also a key problem that needs to be overcome in the arrangement method. In addition, the arrangement of the wires must also consider the vibration of the pile driver during construction, the contact reliability of the connection, and the requirements for waterproofing and corrosion prevention. SUMMARY

[0005] Therefore, the present application provides a sensor setting method for monitoring the mechanical response of a multi-section prefabricated tubular pile, which solves the problems that the current pile body sensor arrangement method cannot ensure the long-term stability and data reliability of the sensors and cannot prevent the wires from being damaged during pile sinking.

[0006] The technical scheme of the present application is implemented as follows: the present application provides a sensor setting method for monitoring mechanical response of a multi-section prefabricated pipe pile, comprising the following steps: S1, the pipe pile has a reinforcement cage, a sensor is arranged on a main reinforcement of the reinforcement cage, a matched first lead wire is led out from the sensor, and a second lead wire is also arranged in the reinforcement cage, both ends of the second lead wire are free ends; S2, the first lead wire and the second lead wire are both fixed on the main reinforcement, the end portion of the first lead wire exceeds the pile top and leaves excess wire, both ends of the second lead wire exceed both ends of the pipe pile and leave excess wire, an excess wire rack is arranged on the end portion of the reinforcement cage, and the excess wire of the first lead wire and the second lead wire is temporarily wound on the excess wire rack; S3, an excess wire pipe is arranged on the top side of the reinforcement cage of the topmost section of the pipe pile, and the excess wire of the first lead wire and the second lead wire of the topmost section of the reinforcement cage is temporarily arranged in the excess wire pipe; S4, concrete is poured into the reinforcement cage to form a concrete pipe pile, and a plurality of pipe piles are sequentially spliced from bottom to top, and each sensor is electrically connected to a mechanical detection device through the first lead wire and the second lead wire in each section of the pipe pile.

[0007] On the basis of the above technical scheme, preferably, in step S1, the sensor is arranged on at least one radial section of the pile body of each section of the pipe pile, two sensors are symmetrically arranged on the same radial section of the pile body of each section of the pipe pile, and the main reinforcement on which the sensor is arranged is a prestressed main reinforcement.

[0008] On the basis of the above technical scheme, preferably, in step S1, the connection part of the sensor and the first lead wire is also protected, comprising the following steps: S11, a plurality of hoses are cut out, the hose is sleeved from the free end of the first lead wire to the connection part of the sensor and the first lead wire, and the hose is fixed on the connection part by binding with iron wire; S12, a waterproof gel is filled into the gap between the hose and the first lead wire; and S13, the hose body and both ends thereof are wrapped with strong electrician's tape.

[0009] On the basis of the above technical scheme, preferably, the length of the excess wire of the first lead wire and the second lead wire is 1m-1.5m.

[0010] On the basis of the above technical scheme, preferably, in step S2, the excess wire of the first lead wire and the second lead wire is temporarily wound on the excess wire rack to form a coil, the coil is first wrapped with thin cotton cloth, and then the thin cotton cloth is wrapped with strong electrician's tape.

[0011] On the basis of the above technical scheme, preferably, in step S3, the following steps are included: S31, two support rods are symmetrically welded on both sides of the end of the excess wire pipe towards the inside of the pipe pile, the axial direction of the support rods is perpendicular to the axial direction of the excess wire pipe; S32, two adjacent steels located inside the steel cage are selected, and the two support rods are fixed on the two steels by iron wire, so that the excess wire pipe extends along the radial direction of the pipe pile; and S33, after the excess wires of the first wire and the second wire are put into the excess wire pipe, the two ends of the excess wire pipe are wrapped and sealed by strong electrician's tape.

[0012] On the basis of the above technical scheme, preferably, in step S4, when each sensor is electrically connected to the mechanical detection device through the first wire and the second wire in each section of the pipe pile, the following steps are included: S41, n sections of pipe piles are arranged from bottom to top, m sensors are arranged in each section of the pipe pile, wherein n and m are integers greater than or equal to 1, the first wires in each section of the pipe pile are sequentially numbered, and the first wires in the nth section of the pipe pile are numbered a n 1 to a n m ; S42, the topmost section of the n sections of pipe piles is set as a top section, the bottommost section of the n sections of pipe piles is set as a bottom section, and each section of the pipe pile between the top section and the bottom section is set as an intermediate section, m second wires are arranged in the intermediate section and the top section, and the second wires in the intermediate section and the top section are sequentially numbered, and the second wires in the nth section of the pipe pile are numbered a 1 1 to a 1 m , a 2 1 to a 2 m , …… , a n-1 1 to a n-1 m ; S43, the first wires and the second wires with the same number in each section of the pipe pile are connected, so that each sensor is electrically connected to the mechanical detection device through the first wires and the second wires.

[0013] On the basis of the above technical scheme, preferably, the excess wire frame is a cross-shaped steel frame, and the excess wires of the first wire and the second wire are wound at the intersection of the cross.

[0014] On the basis of the above technical scheme, preferably, the axial length of the excess wire pipe is greater than the thickness of the concrete cover of the pipe pile.

[0015] The sensor setting method for monitoring the mechanical response of a multi-section prefabricated pipe pile has the following beneficial effects compared with the prior art: (1) The present application can effectively protect the sensor and the wire connecting part by using plastic hose, thin iron wire and waterproof gel, and significantly improve the survival rate of the sensor; according to the structural characteristics of the multi-section prefabricated pipe pile, the free wire is reserved by welding the wire frame and the wire pipe, effectively solving the problem of wire crossing between pile sections, so that effective mechanical response monitoring can be realized in complex engineering environment, and effective technical support is provided for the safety and stability of pile foundation engineering.

[0016] (2) The present application adopts thin cotton cloth and strong adhesive tape to wrap the wire on the wire frame in multiple layers, and blocks the wire pipe by strong adhesive tape, which has strong practicality on site and good temporary protection effect, avoiding damage to the wire during pouring of the concrete pipe pile. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a side view of the pipe pile of the present application; Figure 2 is a structure schematic view of the connecting part of the sensor and the first wire of the present application; Figure 3 is a top view of the wire frame of the present application; Figure 4 is a perspective view of the wire pipe of the present application.

[0019] In the figure: 1, pipe pile; 2, reinforcement cage; 21, main reinforcement; 22, ring hoop reinforcement; 3, sensor; 31, first wire; 32, second wire; 4, wire frame; 5, wire pipe; 51, support rod; 6, hose; 7, waterproof gel; 8, strong electrician's adhesive tape; 9, thin cotton cloth. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] As shown in Figure 1 , in combination with Figure 3 and Figure 4The application discloses a sensor setting method for monitoring mechanical response of a multi-section prefabricated pipe pile. S1, the pipe pile 1 is provided with a steel reinforcement cage 2, a sensor 3 is arranged on a main reinforcement 21 of the steel reinforcement cage 2, and the sensor 3 is tightly fixed on the main reinforcement 21 by using a thin iron wire; a plurality of sensors 3 on the multi-section pipe pile 1 can be arranged on the main reinforcements 21 of different pile sections, but generally, the plurality of sensors 3 are still placed along the direction of the main reinforcements 21; a matched first wire 31 is led out from the sensor 3, and a second wire 32 is also arranged in the steel reinforcement cage 2, and both ends of the second wire 32 are free ends.

[0022] S2, the first wire 31 and the second wire 32 are fixed on the main reinforcement 21, the wires are fixed on the main reinforcement 21 by using the thin iron wire every 20 cm, a certain degree of slackness needs to be kept when the wires are fixed, the wires cannot be too tight or too loose, the wires are prevented from being broken in the tensioning process of the main reinforcement 21, and the wires are also prevented from being damaged by concrete in the pumping process of the concrete; the end portion of the first wire 31 is arranged to be beyond the pile top and to leave excess wire, both ends of the second wire 32 are arranged to be beyond both ends of the pipe pile 1 and to leave excess wire, and an excess wire frame 4 is arranged on the end portion of the steel reinforcement cage 2, and the excess wires of the first wire 31 and the second wire 32 are temporarily wound on the excess wire frame 4.

[0023] S3, an excess wire pipe 5 is arranged on the top side of the steel reinforcement cage 2 at the top end of the multi-section pipe pile 1, and the excess wires of the first wire 31 and the second wire 32 of the steel reinforcement cage 2 at the top end beyond the pile top are temporarily arranged in the excess wire pipe 5. The excess wire pipe 5 is made of a short steel pipe, the cross section of the short steel pipe is circular, and the inner diameter of the short steel pipe is generally less than 50 mm; the short steel pipe has good compression resistance and deformation resistance, and is used for placing the reserved excess wires. If the excess wires are too much, the excess wires cannot be placed in the same excess wire pipe 5 after being folded, a second excess wire pipe 5 can be fixed on the other side of the same cross section, and then the excess wires are equally divided into two parts and are placed separately.

[0024] S4, concrete is poured into the steel reinforcement cage 2 according to a production process flow of a specification to manufacture a prefabricated concrete pipe pile 1, the prefabricated pipe piles 1 are sequentially connected in sequence from bottom to top, and the sensors 3 are electrically connected to a mechanical detection device through the first wires 31 and the second wires 32 in the pipe piles 1.

[0025] In this solution, the specific tools used are the surplus wire rack 4 made of a cross-shaped steel bar frame, the surplus wire tube 5 made of a short steel pipe, fine iron wire, the plastic hose 6, waterproof gel 7, strong electrical tape 8, and fine cotton cloth 9. These tools are conventional tools at the construction site, with low acquisition difficulty and low cost. Using the above tools and the method of this solution to arrange the sensors 3 and the wire routing in the pipe pile 1 can not only effectively bury the sensors 3 and connect the wires without affecting the connection of pile joints, improve the survival rate of the sensors 3, and ensure that they can work accurately and reliably during the pile driving and use stages, but also have strong on-site practicability and greatly reduce the operation difficulty.

[0026] In Figure 1 In the preferred embodiment shown, in step S1, sensors 3 are provided on at least one radial cross-section of the pile body of each pipe pile 1. Two sensors 3 are symmetrically arranged along the center of the cross-section on the same radial cross-section of each pipe pile 1. The main reinforcement 21 where the sensors 3 are provided is prestressed main reinforcement. By detecting the prestress change of the prestressed main reinforcement where the sensors 3 are located, the mechanical response during and after the pouring of the pipe pile 1 can be monitored in real time.

[0027] In Figure 2 In the preferred embodiment shown, in step S1, the connection part between the sensor 3 and the first wire 31 is also protected, including the following steps: S11, cut out several hoses 6 with a length of about 7 cm. The hose 6 is made of plastic, is cylindrical, has a wall thickness of about 1 mm, a smooth inner wall, and an inner diameter slightly larger than the diameter of the wire matching the sensor 3. It has certain flexibility and temperature resistance and is used to protect the connection between the sensor 3 and the matching wire. Take the hose 6 and slip it onto the free end of the first wire 31 and move it to the connection part between the sensor 3 and the first wire 31, and tie and fix the hose 6 to the connection part with iron wire. The fine iron wire is made of corrosion-resistant galvanized low-carbon steel wire with a diameter less than 1 mm, and has good strength, flexibility and corrosion resistance, and is mainly used to fix the embedded sensor 3 and the plastic hose 6, etc.

[0028] S12, fill the gap between the hose 6 and the first wire 31 with waterproof gel 7. The waterproof gel 7 can be injected from the end of the hose 6 through a syringe. The waterproof gel 7 is viscous and has certain fluidity. After curing, it can form a firm waterproof layer. It is used to fill the gap between the plastic hose 6 and the first wire 31 to ensure the waterproofness of the connection part and prevent moisture from seeping in and causing the sensor 3 to short-circuit or be damaged.

[0029] S13, wrap the body and both ends of the hose 6 with strong electrical tape 8. The strong electrical tape 8 has strong adhesion and excellent strength, waterproofness and temperature resistance, and is used to wrap the plastic hose 6 and its both ends to prevent moisture and humidity from seeping in.

[0030] In Figure 1 The preferred embodiment shown in the figure, the first wire 31 and the second wire 32 of the excess wire length is 1m~1.5m, usually the excess wire length 1m, the excess part needs to be cut off.

[0031] In Figure 3 The preferred embodiment shown in the figure, in step S2, the first wire 31 and the second wire 32 of the excess wire is temporarily wound on the excess wire frame 4 to form a coil, first wrapped with a piece of cotton 9, and then wrapped with a piece of strong electrical tape 8. The cotton 9 is resistant to high temperature, and is used to wrap the excess wire coil wound on the excess wire frame 4.

[0032] In Figure 4 The preferred embodiment shown in the figure, step S3 includes the following steps: S31, two support rods 51 are symmetrically welded on both sides of the excess wire tube 5 towards the inside of the pipe pile 1, and the axial direction of the support rod 51 is perpendicular to the axial direction of the excess wire tube 5. The support rod 51 is a short steel bar with a length of 30cm, which is made of the same type of steel bar as the main reinforcement 21.

[0033] S32, select two adjacent steel bars inside the steel reinforcement cage 2, and fix the two support rods 51 on the two steel bars by iron wire, so that the excess wire tube 5 extends along the radial direction of the pipe pile 1.

[0034] S33, after the excess wire of the first wire 31 and the second wire 32 is put into the excess wire tube 5, the two ends of the excess wire tube 5 are wrapped and sealed with strong electrical tape 8.

[0035] In Figure 1 The preferred embodiment shown in the figure, in step S4, when each sensor 3 is electrically connected to the mechanical detection device through the first wire 31 and the second wire 32 in each section of the pipe pile 1, the following steps are included: S41, n sections of pipe piles 1 are arranged from bottom to top, m sensors 3 are arranged in each section of the pipe pile 1, and n and m are both integers greater than or equal to 1. The first wire 31 in each section of the pipe pile 1 is numbered in sequence, and the first wire 31 in the nth section of the pipe pile 1 is numbered as a n 1 to a n m .

[0036] S42, the topmost pipe pile 1 in the n sections of pipe piles 1 is set as the top section, the bottommost pipe pile 1 in the n sections of pipe piles 1 is set as the bottom section, and each pipe pile 1 between the top section and the bottom section is set as the middle section. The second wire 32 is arranged in the middle section and the top section, and the second wire 32 in the middle section and the top section is numbered in sequence, and the second wire 32 in the nth section of the pipe pile 1 is numbered as a 1 1 to a 1m a 2 1 to a 2 m , …… a n-1 1 to a n-1 m .

[0037] S43, connect the first wire 31 and several second wires 32 with the same number in each section of the pipe pile 1, so that each sensor 3 is electrically connected to the mechanical testing equipment through the first wire 31 and several second wires 32.

[0038] The reason for adopting the above technical solution is that the sensor 3 embedded in the intermediate section and the bottom section cannot be connected to the mechanical testing equipment by simply pulling it to the top of the pile of the top section through its matching first wire 31. Even if the first wire 31 is long enough to pull it to the top of the pile of the top section, it will be damaged during the concrete pouring process of the pipe pile 1. Therefore, this solution embeds a second wire 32 in the intermediate section and the top section as a bridging wire for the sensor 3. Thus, the second wire 32 can be left unconnected to the first wire 31 before pouring concrete, which avoids the possible damage to the wire during the pouring process.

[0039] For example, in this implementation, four sections of pipe pile 1 are set up, and two sensors 3 are installed in each section of pipe pile 1. The four sections of pipe pile 1 are, from bottom to top, the bottom section, two intermediate sections, and the top section. The two first conductors 31 in the bottom section are numbered a. 1 1 and a 1 2. The four first conductors 31 of the two intermediate sections are numbered a 2 1. a 2 2. a 3 1 and a 3 2. The two first conductors 31 of the top section are numbered a 4 1 and a 4 2; No second conductor 32 needs to be buried in the bottom section, but a second conductor 32 connected to the two first conductors 31 of the bottom section needs to be buried in the first intermediate section. Therefore, the two second conductors 32 are also numbered a. 1 1 and a 1 2. In the second intermediate section, four second conductors 32 need to be installed, which are connected to the bottom section and the first intermediate section. Therefore, the four second conductors 32 are numbered a. 1 1. a 1 2. a 2 1 and a 2 2; Similarly, six second conductors 32 need to be embedded in the top section, numbered a respectively. 1 1. a 1 2. a 2 1. a 2 2. a3 1 and a 3 2. Then, the same number of wires are connected to electrically connect the sensor 3 to the mechanical detection device.

[0040] In Figure 3 In the preferred embodiment shown, the excess wire holder 4 is a cross-shaped reinforcement cage, and the excess wires of the first wire 31 and the second wire 32 are wound around the intersection of the cross. The cross-shaped reinforcement cage is welded from two short reinforcements of the same type, and is made of the same type of reinforcement as the main reinforcement 21 of the pipe pile 1. Each short reinforcement is as long as the diameter of the reinforcement cage 2, and is welded into a cross-shaped structure for winding and fixing the excess wires of the sensor 3. Generally, the two ends of the reinforcement cage 2 are provided with ring-shaped stirrups 22, and the ends of the cross-shaped reinforcement cage can be welded to the ring-shaped stirrups 22 for fixation.

[0041] In Figure 4 In the preferred embodiment shown, the axial length of the excess wire tube 5 is greater than the thickness of the concrete cover of the pipe pile 1, so that the two ends of the excess wire tube 5 are not blocked by the concrete when the concrete pipe pile 1 is poured, and the free ends of the wires can be taken out from the excess wire tube 5 after the pouring of the pipe pile 1 is completed, and then the mechanical detection device is connected.

[0042] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sensor setup method for monitoring the mechanical response of multi-section precast pipe piles, characterized in that: Includes the following steps, S1, the pipe pile (1) has a steel cage (2), a sensor (3) is installed on the main reinforcement (21) of the steel cage (2), a matching first wire (31) is led out from the sensor (3), and a second wire (32) is also inserted in the steel cage (2), both ends of the second wire (32) are free ends; S2, fix the first conductor (31) and the second conductor (32) on the main reinforcement (21), the end of the first conductor (31) extends beyond the top of the pile and leaves a slack line, and the two ends of the second conductor (32) extend beyond the two ends of the pipe pile (1) and leave a slack line. Set up a slack line frame (4) on the end of the steel cage (2), and temporarily wrap the slack lines of the first conductor (31) and the second conductor (32) around the slack line frame (4); S3, an extra wire pipe (5) is set on the top side of the top steel cage (2) that makes up the multi-section pipe pile (1), and the extra wires of the first conductor (31) and the second conductor (32) of the top steel cage (2) that extend beyond the top of the pile are temporarily placed in the extra wire pipe (5). S4, pour concrete into the steel cage (2) to form concrete pipe piles (1), splice several pipe piles (1) from bottom to top, and electrically connect each sensor (3) to the mechanical testing equipment through the first wire (31) and the second wire (32) in each section of pipe pile (1).

2. The sensor setting method for monitoring the mechanical response of multi-section precast pipe piles according to claim 1, characterized in that: In step S1, each section of the pipe pile (1) is provided with a sensor (3) on at least one radial section of the pile body, and two sensors (3) are symmetrically provided on the same radial section of the pile body of each pipe pile (1), and the main reinforcement (21) of the sensor (3) is set as prestressed main reinforcement.

3. The sensor setting method for monitoring the mechanical response of multi-section precast pipe piles according to claim 1, characterized in that: In step S1, the connection between the sensor (3) and the first wire (31) is also protected, including the following steps: S11, cut out several flexible tubes (6), take the flexible tubes (6) and put them into the free end of the first wire (31) and move them to the connection part between the sensor (3) and the first wire (31), and tie the flexible tubes (6) to the connection part with iron wire; S12, fill the gap between the hose (6) and the first wire (31) with waterproof gel (7); S13, wrap the body and both ends of the hose (6) with strong electrical tape (8).

4. The sensor setting method for monitoring the mechanical response of multi-section precast pipe piles according to claim 1, characterized in that: The length of the extra wires of the first conductor (31) and the second conductor (32) is 1m to 1.5m.

5. The sensor setting method for monitoring the mechanical response of multi-section precast pipe piles according to claim 1, characterized in that: In step S2, the excess wires of the first conductor (31) and the second conductor (32) are temporarily wound around the excess wire frame (4) to form a coil. First, the coil is wrapped with fine cotton cloth (9), and then the fine cotton cloth (9) is wrapped with strong electrical tape (8).

6. The sensor setting method for monitoring the mechanical response of multi-section precast pipe piles according to claim 1, characterized in that: Step S3 includes the following steps: S31, two support rods (51) are symmetrically welded on both sides of the end of the slack pipe (5) facing the inside of the pipe pile (1), and the axial direction of the support rods (51) is perpendicular to the axial direction of the slack pipe (5). S32, select two adjacent steel bars located inside the steel cage (2), and fix the two support rods (51) to the two steel bars by iron wire, so that the excess wire pipe (5) extends radially along the pipe pile (1); S33, after placing the excess wires of the first conductor (31) and the second conductor (32) into the excess wire tube (5), wrap and seal both ends of the excess wire tube (5) with strong electrical tape (8).

7. The sensor setting method for monitoring the mechanical response of multi-section precast pipe piles according to claim 1, characterized in that: In step S4, when each sensor (3) is electrically connected to the mechanical testing device through the first wire (31) and the second wire (32) in each section of the pipe pile (1), the following steps are included: S41, n sections of the pipe pile (1) are arranged from bottom to top, and m sensors (3) are installed in each section of the pipe pile (1), where n and m are integers greater than or equal to 1. The first conductors (31) in each section of the pipe pile (1) are numbered sequentially, and the first conductors (31) in the nth section of the pipe pile (1) are numbered as a. n 1 to a n m ; S42, the topmost pipe pile (1) in the n-section pipe pile (1) is designated as the top section, the bottommost pipe pile (1) in the n-section pipe pile (1) is designated as the bottom section, and each pipe pile (1) between the top and bottom sections is designated as an intermediate section. m (n-1) second conductors (32) are respectively set in the intermediate and top sections. The second conductors (32) in the intermediate and top sections are numbered sequentially. The second conductor (32) in the nth pipe pile (1) is numbered a. 1 1 to a 1 m a 2 1 to a 2 m , …… a n-1 1 to a n-1 m ; S43, connect the first wire (31) and several second wires (32) with the same number in each section of the pipe pile (1) so that each sensor (3) is electrically connected to the mechanical testing equipment through the first wire (31) and several second wires (32).

8. The sensor setting method for monitoring the mechanical response of multi-section precast pipe piles according to claim 1, characterized in that: The slack wire frame (4) is a cross-shaped steel frame, and the slack wires of the first conductor (31) and the second conductor (32) are wrapped around the intersection of the cross.

9. The sensor setting method for monitoring the mechanical response of multi-section precast pipe piles according to claim 1, characterized in that: The axial length of the spur pipe (5) is greater than the thickness of the concrete protective layer of the pipe pile (1).

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