Tubular pile adapting to complex geology and construction method thereof

Abstract

The invention relates to a tubular pile adapting to complex geology and a construction method thereof, and belongs to the technical field of tubular pile construction. The tubular pile comprises a tubular pile body, a monitoring mechanism, a hydraulic system, a pile tip and a main control unit; a tubular pile is sunk by a pile feeder provided with a fixing device, the monitoring mechanism is arranged at a pile tip, and the hydraulic system is mounted between the tubular pile and the pile tip; the monitoring mechanism, the pile feeder and the hydraulic system are electrically connected with the main control unit; the monitoring mechanism is used for monitoring the penetration of the pipe pile and uploading penetration data to the main control unit, and the main control unit analyzes the geological condition of the next pile sinking layer according to the penetration data, sends an instruction for starting the fixing device to the pile feeder to fix the pipe pile and sends an instruction for driving the pile tip to press down to the hydraulic system. The tubular pile can be hammered and implanted into a soil layer from the top of the tubular pile by a pile feeder, and a hydraulic system can be started to drive the pile tip to sink independently when the tubular pile encounters a hard layer, so that the tubular pile is guided, the tubular pile is prevented from deviating and cracking, and the perpendicularity and integrity of the tubular pile are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe pile construction, and in particular relates to a pipe pile adaptable to complex geology and a construction method thereof. Background Art

[0002] In modern construction projects, pile foundations are the basic parts that bear the load of the superstructure and transfer it to the stratum. Their design and construction quality directly affect the safety and stability of the building. Geological conditions are one of the main difficulties in pile foundation construction. Factors such as soil properties, rock distribution, and groundwater level under different geological conditions will affect the construction of pile foundations and increase the difficulty of construction.

[0003] Complex geology usually refers to geological conditions with unique physical and mechanical properties, diagenetic conditions and construction difficulties, as well as complex soil structure. Such geological conditions usually have high structural strength, high density, low porosity and high compaction coefficient, which bring great difficulties to pile foundation construction, such as dense sand or dense silt layer, and passing through over-consolidated clay.

[0004] The penetration of a pile refers to the depth to which the penetration body enters the soil under the impact of gravity. The penetration essentially reflects the pile's ability to penetrate the foundation under specific hammering conditions and is an indicator of the resistance of the foundation soil to the pile body.

[0005] If pipe piles are not discovered in time when they suddenly encounter rock formations with high structural strength, high density, low porosity and high compaction, such as full rock and super-consolidated clay, once the pipe piles are implanted in the hard rock layer, especially when transitioning from the soft soil layer to the rock layer, since the settlement speed and force have not been changed, the pipe piles are prone to deviation and rupture when they are driven from the soft soil layer to the hard rock layer, resulting in changes in the verticality of the pipe piles. If the pipe piles deviate after being implanted in the rock layer, the construction cost of correction and rectification will increase, especially when the pipe piles are implanted in the rock layer, which means that they have been implanted in the stress-bearing layer and the pipe piles have been fixed, it is difficult to rely on external measures to correct the verticality.

[0006] Therefore, the present invention proposes a pipe pile and a construction method thereof that are suitable for complex geology, aiming to solve the problems of deviation and cracking in pile foundation construction under complex geological conditions and improve construction efficiency and project quality. Summary of the invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides a pipe pile adapted to complex geology and a construction method thereof, which solves the problem that the tip of the pipe pile is easily offset when encountering boulders under existing complex geological conditions, resulting in the verticality not meeting the construction requirements.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A pipe pile adapted to complex geology comprises a pipe pile, a monitoring mechanism, a hydraulic system, a pile tip, a hydraulic system and a main control unit; the pipe pile is sunk by a pile driver provided with a fixing device, the monitoring mechanism is arranged at the pile tip, and the hydraulic system is installed between the pipe pile and the pile tip; the monitoring mechanism, the pile driver and the hydraulic system are all electrically connected to the main control unit;

[0010] The monitoring mechanism is used to monitor the penetration of the pipe pile and upload the penetration data to the main control unit. The main control unit analyzes the geological conditions of the next pile sinking layer according to the penetration data and sends a command to start the fixing device to the pile driver to fix the pipe pile, and sends a command to drive the pile tip to press down to the hydraulic system. The hydraulic system drives the pile tip to drill into the hard layer.

[0011] Preferably, the monitoring mechanism includes a vibration sensor and a pile resistance sensor, the vibration sensor is used to detect the vibration force applied to the pile tip, and the pile resistance sensor is used to detect the pile resistance during the sinking process of the pile tip and upload the data to a main control unit, which determines the pile resistance of the pile tip each time the pile tip is hammered.

[0012] Preferably, the pile resistance sensor includes a resistance member and a deformation member; the resistance member is embedded in the surface of the pile tip and moves on the surface of the pile tip, and the deformation member is connected to the resistance member to transmit the movement of the deformation member to the resistance member; the resistance member is installed inside the pile tip and connected to the main control unit to upload the movement of the deformation member to the main control unit.

[0013] Preferably, the detection force range of the vibration sensor is 1000-8300 KN.

[0014] Preferably, the hydraulic system is connected to the bottom of the pipe pile by welding or bolts, and the pile tip is connected to the hydraulic system in the same way.

[0015] Preferably, the hydraulic system comprises a hydraulic cylinder, an oil pipe and a hydraulic pump; the hydraulic cylinder is installed at the bottom of the pipe pile, the hydraulic pump is installed on the ground, and the hydraulic cylinder and the hydraulic pump are connected by an oil pipe.

[0016] Preferably, the pipe pile is a PHC pipe pile.

[0017] A pipe pile construction method adapted to complex geology, S1, measurement and setting out: determining the center position of the pipe pile;

[0018] S2, Pipe pile driving: Install the hydraulic system and pile tip, hoist the pipe pile and correct the verticality, and drive the pipe pile into the pile using the pile hammer of the pile driver;

[0019] S3, monitoring the verticality of the pile: when the main control unit detects that the penetration of the pile is abnormal, the pile hammer stops hammering the pile, and the pile driver switches the fixing device to fix the pile at the current position;

[0020] S4, pile tip guiding pipe pile: the main control unit starts the hydraulic system, and the hydraulic system drives the pile tip to continue drilling downward. The hydraulic system stops running after the pile tip completely enters the hard layer;

[0021] S5, continue to implant the pipe pile: the fixing device of the pile driver is switched to the pile hammer, and the pile hammer continues to hammer the pipe pile;

[0022] S6 pipe pile connection, the pile head of the lower section pile is 1.0m to 1.3m above the ground for connection, and the pipe pile connection adopts the end plate welding method;

[0023] S7, repeat S3-S6 until the pipe piles are implanted into the bearing layer.

[0024] Preferably, when the first section of the pipe pile is driven in S2, the verticality deviation is ±0.5%, and the pile hammer, the fixing device and the pile driver should be on the same center line as the pipe pile.

[0025] Preferably, the maximum piling force during hammer construction is less than 8219.9 KN.

[0026] The beneficial effects of the present invention are:

[0027] Pipe piles can adapt to complex geology and the pile driving plan can be adjusted in time according to the complex geology. Pipe piles can be hammered into the soil layer from the top of the pile by the pile driver, and when encountering a hard layer, the hydraulic system can be used to drive the pile tip to sink alone, thereby guiding the pipe piles and avoiding pipe pile displacement and cracking. Through the coordinated work of monitoring mechanisms, hydraulic systems, pile drivers and fixing devices, as well as the main control unit, pipe piles can significantly reduce the risk of deviation when encountering boulders or hard layers, thereby improving construction efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0029] Figure 1 A schematic diagram of pipe pile sinking provided in one embodiment of the present invention;

[0030] Figure 2 A schematic diagram of starting a detection mechanism provided in one embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the installation of a monitoring mechanism provided in one embodiment of the present invention;

[0032] Legend: 1. Pipe pile; 21. Vibration sensor; 22. Pile resistance sensor; 221. Deformation element; 222. Resistance element; 3. Hydraulic system; 31. Hydraulic cylinder; 4. Pile tip; 5. Pile driver; 51. Fixing device; 52. Pile hammer; 6. Hard layer. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0034] like Figure 1-Figure 3 As shown, a pipe pile 1 adapted to complex geology comprises a pipe pile 1, a monitoring mechanism, a hydraulic system 3, a pile tip 4 and a main control unit; the pipe pile 1 is sunk by a pile driver 5 provided with a fixing device 51, the monitoring mechanism is arranged at the pile tip 4, and the hydraulic system 3 is installed between the pipe pile 1 and the pile tip 4; the monitoring mechanism, the pile driver 5 and the hydraulic system 3 are all electrically connected to the main control unit;

[0035] The monitoring mechanism is used to monitor the penetration of the pipe pile 1 and upload the penetration data to the main control unit. The main control unit analyzes the geological conditions of the next pile layer according to the penetration data and sends a command to start the fixing device 51 to the pile driver 5 to fix the pipe pile 1, and sends a command to drive the pile tip 4 to press down to the hydraulic system 3. The hydraulic system 3 drives the pile tip 4 to drill into the hard layer 6;

[0036] The penetration data of the pipe pile 1 detected by the monitoring agency directly reflects the geological conditions encountered by the pipe pile 1 during the current and next sinking. In particular, when encountering isolated rocks or hard layers 6, the penetration will be reduced because the hard layer 6 structure is encountered in the soil layer, so that the pipe pile 1 will act on the hard layer 6 when sinking, and the hard layer 6 will also produce a reaction force on the pipe pile 1, so that under the same force, compared with the conventional soil layer, the penetration of the hard layer 6 is smaller. Therefore, the detection agency can predict and judge in advance based on this phenomenon. The soil structure of the pipe pile 1 is adjusted in time to adjust the pile sinking plan of the pipe pile 1; the hydraulic system 3 is installed between the pipe pile 1 and the pile tip 4, and drives the pile tip 4 to press down according to the command of the main control unit. When the monitoring mechanism detects that the penetration is abnormally reduced, the main control unit will send a command to the hydraulic system 3 to drive the pile tip 4 to drill the hard layer 6, opening a way for the sinking guide of the pipe pile 1, avoiding the pipe pile 1 and the pile tip 4 being hammered and sunk by the pile driver 5 together, which causes the pile tip 4 to easily deviate when acting on the hard layer 6, resulting in the verticality of the pipe pile 1 not meeting the requirements Or the pile driver 5 hammers at a high speed and with a large force, the pile tip 4 acts on the hard layer 6 with too much force, causing the pile 1 to break. Therefore, the hydraulic system 3 drives the pile tip 4 to sink alone to guide the pile 1, which can ensure the verticality of the pile 1 and the integrity of the pile body of the pile 1. When the hydraulic system 3 drives the pile tip 4 to drill, in order to ensure that the pile 1 does not move and the pile tip 4 can sink effectively, before the hydraulic system 3 is started, the fixing device 51 is required to fix the pile 1 and then start the hydraulic system. The system 3 drives the pile tip 4 to sink, so that the pile tip 4 can be supported by the pipe pile 1 from the top, so that under the action of the hydraulic system 3, the effective sinking depth of the pile tip 4 is greater; the pile driver 5 is responsible for sending the pipe pile 1 into the soil, and temporarily fixes the pipe pile 1 through the fixing device 51 under the instruction of the main control unit. When the monitoring mechanism detects geological changes, the main control unit will send an instruction to the pile driver 5 to start the fixing device 51 to firmly fix the pipe pile 1 at the current position to prevent the pipe pile 1 from moving or tilting due to geological changes.

[0037] In summary, the pipe pile 1 can adapt to complex geology and adjust the pile driving plan in time according to the complex geology. The pipe pile 1 can be hammered into the soil layer from the top of the pile by the pile driver 5, and can also enable the hydraulic system 3 to drive the pile tip 4 to sink alone when encountering a hard layer 6, thereby guiding the pipe pile 1 and avoiding the displacement and rupture of the pipe pile 1; the pipe pile 1 can significantly reduce the risk of deviation when encountering boulders or hard layers 6 through the coordinated work of the monitoring mechanism, the hydraulic system 3, the pile driver 5 and the fixing device 51 as well as the main control unit, thereby improving the construction efficiency and quality.

[0038] In one embodiment, the monitoring mechanism is arranged at the pile tip 4, and the monitoring mechanism includes a vibration sensor 21 and a pile resistance sensor 22. The vibration sensor 21 is used to detect the vibration force on the pile tip 4, and the pile resistance sensor 22 is used to detect the pile resistance during the sinking process of the pile tip 4, and upload the data to the main control unit, which determines the pile resistance of the pile tip 4 each time it is hammered. The vibration sensor 21 is installed close to the pile tip 4. When the pile driver hammers the pile body, the pile tip 4 will be subjected to the reaction force from the ground and vibrate. The vibration sensor 21 can sensitively capture these vibration signals and convert them into electrical signals. These electrical signals are then sent to the main control unit through the data transmission module. The main control unit can evaluate the impact force and distribution of each hammering by analyzing the vibration signal, and provide direct feedback on the hammering effect to the construction personnel. At the same time, the pile resistance sensor 22 is also integrated in the monitoring mechanism to monitor the pile resistance encountered by the pile tip 4 during the sinking process in real time. The pile resistance is an important indicator reflecting the soil properties, pile body state and pile sinking effect. The pile resistance sensor 22 can accurately measure and record the resistance value of the pile tip 4 at different depths. These data are also transmitted to the main control unit through the data transmission module. The main control unit uses these data, combined with the preset algorithm, to instantly calculate the change in the pile side resistance of the pile tip 4 after each hammering, thereby evaluating the bearing capacity and stability of the pile foundation, timely discovering and handling abnormal resistance caused by changes in soil conditions or damage to the pile body, and effectively avoiding the occurrence of pile body tilting, fracture, etc., ensuring the safety of personnel and equipment on the construction site. With the help of the data analysis and decision support functions of the main control unit, construction personnel can plan the construction progress more scientifically, reduce unnecessary waiting and repetitive work, and improve overall construction efficiency.

[0039] In one embodiment, the pile resistance sensor 22 includes a resistance member 222 and a deformation member 221; the resistance member 222 is embedded in the surface of the pile tip 4 and moves on the surface of the pile tip 4, and the deformation member 221 is connected to the resistance member 222, so as to transmit the movement of the deformation member 221 to the resistance member 222; the resistance member 222 is installed inside the pile tip 4, connected to the main control unit, and uploads the movement to the main control unit; during the pile foundation construction process, the pile tip 4 is gradually pressed into the stratum, and the resistance member 222 of the pile resistance sensor 22 is designed to be tightly embedded in the surface of the pile tip 4 to ensure that it can penetrate into the stratum together with the pile tip 4. As the pile tip 4 is pressed in, the resistance member 222 will move relatively along the surface of the pile tip 4, and the movement process directly reflects the change in resistance encountered by the pile tip 4. The deformation member 221 serves as a bridge connecting the resistance member 222 and the main control unit. , can accurately capture and transmit the movement of the resistance member 222. When the resistance member 222 moves due to the formation resistance, it will convert this movement into the deformation of the deformation member 221 through a mechanical structure such as a spring sheet. The deformation member 221 can be an elastic element, and its deformation degree is proportional to the movement of the resistance member 222. After the deformation of the deformation member 221, its internal or external integrated sensors such as strain gauges will convert the deformation into electrical signals, which are then transmitted to the main control unit via cables or wirelessly. The main control unit, as a data processing center, receives signals from the deformation member 221, decodes and processes them, and finally obtains real-time data of the pile tip 4 resistance. According to the real-time data of the pile tip 4 resistance, the formation properties can be judged more accurately, providing data for the adjustment and optimization of subsequent construction plans. For example, under complex geological conditions, the pile sinking plan can be adjusted according to the resistance changes to ensure that the piles can be completely and accurately sunk into the bearing layer.

[0040] In one embodiment, the detection force range of the vibration sensor 21 is 1000-8300 KN. The detection force range of the vibration sensor 21 is large enough to ensure that when the pile driver 5 performs normal hammering, all meaningful vibration signals can be accurately captured and converted into analyzable data. At the same time, it avoids missing important information or being disturbed by small vibrations due to a small detection range, thereby improving the accuracy and reliability of the data. Within a larger detection force range, the vibration sensor 21 can distinguish between significant vibrations generated by the hammering of the pile driver 5 and small vibrations in the surrounding environment, which helps to extract information directly related to pile foundation construction from complex vibration signals, and provides clearer and more accurate input for subsequent data analysis and processing.

[0041] In one embodiment, the hydraulic system 3 is connected to the bottom of the pipe pile 1 by welding or bolts, and the pile tip 4 is connected to the hydraulic system 3 in the same way; the stable connection between the hydraulic system 3, the pipe pile 1 and the pile tip 4 reduces the loss of energy during the transmission process. When the hydraulic system 3 is working, the hydraulic energy generated by it can be quickly and efficiently transmitted to the pile tip 4, and converted into mechanical energy to push the pile tip 4 forward, thereby improving the efficiency of the piling operation and enabling the pile tip 4 to penetrate the hard layer 6 more quickly.

[0042] In one embodiment, the hydraulic system 3 includes a hydraulic cylinder 31, an oil pipe and a hydraulic pump; the hydraulic cylinder 31 is installed at the bottom of the pile 1, the hydraulic pump is installed on the ground, and the hydraulic cylinder 31 and the hydraulic pump are connected by an oil pipe; the hydraulic cylinder 31 converts hydraulic energy into mechanical energy through the internal piston and cylinder structure, directly pushing the pile tip 4 forward, and the oil pipe is a key component connecting the hydraulic cylinder 31 and the hydraulic pump, responsible for transmitting high-pressure hydraulic oil. The oil pipe should be made of high-strength and corrosion-resistant materials to ensure that it can still work stably under high pressure and harsh environment. The hydraulic pump is installed on the ground as the power source of the entire hydraulic system 3. It is driven by an electric motor or an engine to convert mechanical energy into hydraulic energy and transmit it to the hydraulic cylinder 31 through an oil pipe. The hydraulic pump needs to have a stable output pressure and flow to meet the power requirements of the pile driving operation. At the same time, it is also required to have overload protection and automatic adjustment functions to improve the safety and reliability of the system.

[0043] In one embodiment, the pipe pile 1 is a PHC pipe pile 1, which is made by prestressing technology. The concrete is in a compressed state under the action of prestressed steel bars, which significantly improves the compression, bending and shear strength of the pile body; this enables the PHC pipe pile 1 to withstand a larger load and reduce the risk of pile body fracture or deformation. The PHC pipe pile 1 is usually prefabricated in a factory and hoisted on site for construction. This method not only improves the construction speed, but also reduces the amount of wet work on site, reduces the construction difficulty and cost. Combined with the superior performance of the PHC pipe pile 1 and the efficient power transmission of the hydraulic system 3, the system has the characteristics of fast construction speed, high bearing capacity, good durability, and significant economic benefits.

[0044] A pipe pile 1 construction method adapted to complex geology includes S1, measuring and setting out: determining the center position of the pipe pile;

[0045] S2, sinking the pipe pile 1: installing the hydraulic system 3 and the pile tip 4, hoisting the pipe pile 1 and correcting its verticality, and driving the pipe pile 1 with the pile hammer 52 of the pile driver 5;

[0046] S3, monitoring the verticality of the pipe pile 1: when the main control unit detects that the penetration of the pipe pile 1 is abnormal, the pile hammer 52 stops hammering the pipe pile 1, and the pile driver 5 switches the fixing device 51 to fix the pipe pile 1 at the current position;

[0047] S4, the pile tip 4 guides the pipe pile 1: the main control unit starts the hydraulic system 3, and the hydraulic system 3 drives the pile tip 4 to continue drilling downward. After the pile tip 4 completely enters the hard layer 6, the hydraulic system 3 stops running;

[0048] S5, continue implanting the pipe pile 1: the fixing device 51 of the pile driver 5 is switched to the pile hammer 52, and the pile hammer 52 continues to hammer the pipe pile 1;

[0049] S6 pipe pile 1 is connected, and the pile head of the lower section of the pile is 1.0m to 1.3m above the ground. The connection of pipe pile 1 adopts the end plate welding method.

[0050] S7, repeat S3-S6 until the pipe pile 1 is implanted into the bearing layer;

[0051] With the assistance of the hydraulic system 3, it is possible to quickly penetrate obstacles such as hard interlayers or boulders, reduce the time for repeated adjustments in traditional hammering methods, significantly improve construction efficiency, monitor the verticality and penetration of the pipe pile 1 in real time, and immediately stop hammering and fix the pipe pile 1 once an abnormality is found, effectively preventing the risk of the pipe pile 1 being damaged or deviating from the predetermined position due to excessive hammering, thereby improving construction safety; by precisely controlling the implantation depth and stability of the pipe pile 1, it is ensured that the pipe pile 1 can be accurately embedded in the bearing layer and effectively bear the weight of the superstructure, thereby improving the overall construction quality of the pile foundation, and reducing the overall construction cost by reducing the waste of resources and time costs caused by repeated adjustments and construction interruptions.

[0052] In one embodiment, when the first section of the pipe pile 1 is driven in S2, the verticality deviation is ±0.5%, and the pile hammer 52, the fixture 51 and the pile driver 5 should be on the same center line as the pipe pile 1. The verticality deviation is strictly controlled at ±0.5%, which ensures that the first section of the pipe pile 1 maintains a high degree of verticality during the driving process, which is crucial to the stability and bearing capacity of the entire pipe pile 1 foundation. Excessive verticality deviation will cause uneven force on the pile body, affecting the bearing capacity and durability of the pile foundation. By ensuring that the pile hammer 52, the fixture 51 and the pile driver 5 are on the same center line as the pipe pile 1, the adjustment time and workload caused by equipment misalignment can be reduced. This not only improves construction efficiency, but also reduces material waste and labor costs that may be caused by repeated adjustments. The precise control of verticality helps to avoid tilting or offsetting of the pipe pile 1 during the driving process.

[0053] In one embodiment, the maximum piling force during hammer construction is less than 8219.9 KN. Excessive piling force may cause the pipe pile 1 to be subjected to excessive impact force, thereby causing the risk of cracks, damage or even breakage of the pipe pile 1. Controlling the maximum piling force within a reasonable range can effectively avoid this situation, protect the integrity and structural safety of the pipe pile 1, and control the magnitude of the piling force, which helps to more accurately control the sinking speed and depth of the pipe pile 1 and improve the precision and accuracy of the construction. Excessive piling force may cause greater disturbance and squeezing effect on the surrounding foundation when the pipe pile 1 is driven into the foundation, which may not only affect the stability of adjacent pile positions, but also may have an adverse effect on surrounding buildings or underground pipelines. A smaller piling force can reduce the disturbance to the foundation and reduce the impact on the surrounding environment.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pipe pile adapted to complex geology, characterized in that: It comprises a pipe pile, a monitoring mechanism, a hydraulic system, a pile tip, a hydraulic system and a main control unit; the pipe pile is sunk by a pile driver provided with a fixing device, the monitoring mechanism is arranged at the pile tip, and the hydraulic system is installed between the pipe pile and the pile tip; the monitoring mechanism, the pile driver and the hydraulic system are all electrically connected to the main control unit; The monitoring mechanism is used to monitor the penetration of the pipe pile and upload the penetration data to the main control unit. The main control unit analyzes the geological conditions of the next pile sinking layer according to the penetration data and sends a command to start the fixing device to the pile driver to fix the pipe pile, and sends a command to drive the pile tip to press down to the hydraulic system. The hydraulic system drives the pile tip to drill into the hard layer.

2. A pipe pile adapted to complex geology according to claim 1, characterized in that: The monitoring mechanism includes a vibration sensor and a pile resistance sensor. The vibration sensor is used to detect the vibration force on the pile tip. The pile resistance sensor is used to detect the pile resistance during the sinking process of the pile tip and upload it to the main control unit. The main control unit determines the pile resistance of the pile tip each time it is hammered.

3. A pipe pile adapted to complex geology according to claim 2, characterized in that: The pile resistance sensor includes a resistance member and a deformation member; the resistance member is embedded in the surface of the pile tip and moves on the surface of the pile tip, and the deformation member is connected to the resistance member to transmit the movement of the deformation member to the resistance member; the resistance member is installed inside the pile tip and connected to the main control unit to upload the movement of the deformation member to the main control unit.

4. The pipe pile adapted to complex geology according to claim 2, characterized in that: The detection force range of the vibration sensor is 1000-8300KN.

5. The pipe pile adapted to complex geology according to claim 1, characterized in that: The hydraulic system is connected to the bottom of the pipe pile by welding or bolts, and the pile tip is connected to the hydraulic system in the same way.

6. The pipe pile adapted to complex geology according to claim 1, characterized in that: The hydraulic system comprises a hydraulic cylinder, an oil pipe and a hydraulic pump; the hydraulic cylinder is installed at the bottom of the pipe pile, the hydraulic pump is installed on the ground, and the hydraulic cylinder and the hydraulic pump are connected through an oil pipe.

7. The pipe pile adapted to complex geology according to claim 1, characterized in that: The pipe pile is a PHC pipe pile.

8. A pipe pile construction method suitable for complex geology applicable to any one of claims 1 to 7, characterized in that: S1, measurement and setting out: determine the center position of the pile; S2, Pipe pile driving: Install the hydraulic system and pile tip, hoist the pipe pile and correct the verticality, and drive the pipe pile into the pile using the pile hammer of the pile driver; S3, monitoring the verticality of the pile: when the main control unit detects that the penetration of the pile is abnormal, the pile hammer stops hammering the pile, and the pile driver switches the fixing device to fix the pile at the current position; S4, pile tip guiding pipe pile: the main control unit starts the hydraulic system, and the hydraulic system drives the pile tip to continue drilling downward. The hydraulic system stops running after the pile tip completely enters the hard layer; S5, continue to implant the pipe pile: the fixing device of the pile driver is switched to the pile hammer, and the pile hammer continues to hammer the pipe pile; S6 pipe pile connection, the pile head of the lower section pile is 1.0m to 1.3m above the ground for connection, and the pipe pile connection adopts the end plate welding method; S7, repeat S3-S6 until the pipe piles are implanted into the bearing layer.

9. A pipe pile construction method adapted to complex geology according to claim 8, characterized in that: When the first section of the pipe pile in S2 is driven in, the verticality deviation is ±0.5%, and the pile hammer, the fixing device and the pile driver should be on the same center line as the pipe pile.

10. A pipe pile construction method adapted to complex geology according to claim 8, characterized in that: The maximum piling force during hammer construction is less than 8219.9KN.

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