Prestressed pipe pile composite foundation construction monitoring auxiliary system and construction method

Abstract

The invention relates to the technical field of civil engineering construction, in particular to a prestressed pipe pile composite foundation construction monitoring auxiliary system and a construction method, and the prestressed pipe pile composite foundation construction monitoring auxiliary system comprises a base station, a plurality of receivers and a plurality of stirring drilling machines; each stirring drilling machine is provided with a microprocessor, the microprocessor is connected with a display screen and an alarm, the top end of a drill rod of each stirring drilling machine is provided with a receiver and a perpendicularity monitoring sensor through a forced centering disc, and the receiver and the perpendicularity monitoring sensor are connected with the microprocessor through a wireless communication module; the system also comprises a total server and a cloud platform, each microprocessor is in communication connection with the cloud platform, and the cloud platform is in communication connection with the total server. Through a base station, a receiver, a perpendicularity monitoring sensor and a wireless communication module, positioning of the horizontal position of a pile foundation and synchronous real-time monitoring of the perpendicularity and the pile length (elevation H) are achieved. The positioning precision is improved, the perpendicularity is controlled, and the problems that in the prior art, positioning errors are accumulated, and the perpendicularity is greatly interfered by the environment are thoroughly solved.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering construction, and specifically relates to a construction monitoring assistance system and a construction method for a prestressed pipe pile composite foundation. Background Art

[0002] Soft foundation treatment construction refers to the process of treating soft soil foundations in highway construction to improve the physical and mechanical properties of the foundation and ensure the stability and bearing capacity of the roadbed. In the prior art, prestressed pipe pile composite foundation construction is commonly used for soft foundation treatment. Prestressed pipe pile composite foundation construction is a method of enhancing the bearing capacity of the foundation by driving prestressed pipe piles into the soil. Prestressed pipe piles are usually made of concrete, have high strength and durability, and are suitable for various soil conditions.

[0003] Through research, it is found that there are three major technical pain points in current soft foundation treatment construction: 1. Insufficient positioning accuracy: Traditional total station layout requires frequent station transfer, and the cumulative error can reach more than 10 cm in large field construction. For example, for the Southern Surveying and Mapping NTS-372R total station, the nominal accuracy within a 1 km measurement range is ±2 mm + 2 ppm; 2. Difficult to control verticality: Conventional plumb bob detection, such as the Bosch GLL3-80, is greatly affected by wind, and the pile body deviation rate generally exceeds the design requirement of 1%; 3. Lag in pile length monitoring: The existing core sampling detection method, such as the CCCC Tianhe JTL-50 core sampler, needs to be implemented after the concrete has solidified, and the cost of rectifying quality defects is as high as 3-5 times the normal construction cost.

[0004] Currently, the prestressed pipe pile composite foundation construction assistance devices in use, such as total stations and plumb bobs, cannot solve the problems of positioning accuracy, verticality, and pile length control in soft foundation treatment; therefore, a construction monitoring assistance system for prestressed pipe pile composite foundations that can integrate pile foundation positioning, verticality monitoring, and pile length control is needed. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a construction monitoring assistance system for prestressed pipe pile composite foundations that integrates pile foundation positioning, verticality monitoring, and pile length control.

[0006] The technical solution adopted by the present invention to solve its technical problems is:

[0007] A construction monitoring and assisting system for a prestressed pipe pile composite foundation, comprising a reference station for Beidou satellite positioning, several receivers for receiving positioning information, and several mixing drills; a microprocessor is provided on each mixing drill, the microprocessor is connected with a display screen and an alarm, an installation groove is arranged at the center of the top end of the drill pipe of each mixing drill, a receiver and a verticality monitoring sensor are installed in the installation groove through a forced centering plate, and the receiver and the verticality monitoring sensor are connected with the microprocessor through a wireless communication module; a general server and a cloud platform are further included, each microprocessor is in communication connection with the cloud platform, and the cloud platform is in communication connection with the general server.

[0008] As a preference, a further technical solution of the present invention is:

[0009] Preferably, the verticality monitoring sensor adopts a biaxial inclination sensor.

[0010] Preferably, the alarm adopts a buzzer and an LED warning light.

[0011] The present invention also discloses a construction method for a prestressed pipe pile composite foundation, which uses the construction monitoring and assisting system for a prestressed pipe pile composite foundation for construction, and the specific steps are as follows:

[0012] S1. System deployment stage: A Beidou satellite positioning reference station is erected at a stable position at the construction site to provide real-time kinematic differential positioning correction data; an installation groove is arranged at the center of the top end of the drill pipe of each mixing drill, and a Beidou receiver and a verticality monitoring sensor are fixedly installed through a forced centering plate to ensure that the antenna phase center of the receiver coincides with the axis of the drill pipe.

[0013] S2. Equipment connection and initialization: The receiver and the biaxial inclination sensor on each mixing drill are connected with the microprocessor through a wireless communication module, and the microprocessor is connected with a data processing unit, a display screen and an alarm; the receiver is initialized to receive the differential correction signal of the reference station to achieve real-time kinematic high-precision positioning; the verticality monitoring sensor is calibrated to zero to ensure that the initial inclination readings of the X-axis and the Y-axis are zero in the static state.

[0014] S3. Real-time monitoring during construction: The receiver obtains the three-dimensional coordinates (X, Y, H) of the top end of the drill pipe in real time, and determines the horizontal position deviation of the drill pipe through least squares adjustment calculation; the verticality deviation is obtained through the verticality monitoring sensor.

[0015] S4. Dynamic warning and adjustment: After the horizontal position deviation and the verticality deviation are input into the microprocessor: if the horizontal offset exceeds the first preset threshold, a first-level alarm is triggered, and the offset direction and the adjustment amount are displayed on the display screen; if the verticality deviation exceeds the second preset threshold, a second-level alarm is triggered, and the operator is prompted to stop the machine for correction through the alarm.

[0016] S5. Data Upload: The microprocessor uploads the encrypted horizontal position deviation value and verticality deviation value to the cloud platform, which provides a unified historical data storage and access entry; the general server can obtain historical data through the cloud platform for subsequent quality inspection.

[0017] The present invention adopting the above technical solution, compared with the prior art, has the following prominent features:

[0018] 1. By integrating Beidou satellite positioning (reference station and receiver), biaxial inclinometer sensor and wireless communication module, synchronous real-time monitoring of pile foundation positioning (horizontal position), verticality and pile length (elevation H) is realized; compared with the traditional total station sub-item detection method, the positioning accuracy is improved from the ±10 cm level to the ±5 mm level (RTK differential positioning), and the verticality control is optimized from 1% to within 0.3% (biaxial inclinometer sensor accuracy ±0.1°), completely solving the problems of positioning error accumulation and large environmental interference on verticality in the prior art.

[0019] 2. The system calculates the horizontal position deviation value and verticality deviation value in real time through the microprocessor, and triggers hierarchical alarms in combination with the first and second preset thresholds. Compared with the lag of the traditional detection after concrete solidification, it can realize immediate rectification during the construction process and avoid construction period delays caused by rework.

[0020] 3. Adopting the Beidou networking mode of a single reference station and multiple receivers, it supports parallel operation of multiple mixing drills. Compared with the working method of the total station that needs to frequently change stations, the construction efficiency is significantly improved.

[0021] 4. By using a forced centering plate, it ensures that the antenna phase center of the receiver coincides with the axis of the drill pipe, eliminating mechanical installation errors.

[0022] 5. The data interconnection between the cloud platform and the general server realizes digital traceability throughout the construction process, providing traceable original data for quality inspection. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the mixing drill in the embodiment of the present invention;

[0024] Figure 2 is a schematic connection structure diagram of the receiver and the verticality monitoring sensor in the embodiment of the present invention;

[0025] Figure 3 is a flow chart of the construction method of the prestressed pipe pile composite foundation in the embodiment of the present invention.

[0026] Description of the reference numerals: 1. Mixing drill; 2. Forced centering plate; 3. Receiver; 4. Verticality monitoring sensor; 5. Display screen. Detailed Embodiments

[0027] The present invention will be further described below in conjunction with specific embodiments. The purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0028] As Figure 1 、 Figure 2 shown, this embodiment provides a construction monitoring assistance system for a prestressed pipe pile composite foundation, which includes a reference station for Beidou satellite positioning, several receivers 3 for receiving positioning information, and several mixing drills 1; a microprocessor is provided on each mixing drill 1. In this embodiment, the microprocessor uses STM32H743, which integrates a wireless communication module (LoRa4G dual-mode), and receives Beidou positioning data and inclination data in real time; the microprocessor is connected to a display screen 5 and an alarm. The display screen 5 uses a 7-inch industrial touch screen to display the drill rod coordinates (X, Y, H), verticality (X / Y axis inclination), and deviation trend graph in real time. An installation groove is provided at the center of the top end of the drill rod of each mixing drill 1. A receiver 3 and a verticality monitoring sensor 4 are installed in the installation groove through a forced centering plate 2. The receiver 3 and the verticality monitoring sensor 4 are connected to the microprocessor through a wireless communication module; it also includes a general server and a cloud platform. Each microprocessor communicates with the cloud platform, and the cloud platform communicates with the general server; among them, the cloud platform is built based on Alibaba Cloud IoT, receives the encrypted data (AES-256 encryption) uploaded by each drill, stores historical data such as construction trajectories and verticality curves, and supports BIM model comparison. General server: Deploy a construction quality analysis system, automatically generate a quality inspection report, mark the out-of-tolerance points for later acceptance; the alarm uses a buzzer and an LED warning light; the receiver 3 uses a Huace Navigation P5-GNSS receiver 3 with a built-in 4G communication module; the verticality monitoring sensor 4 uses a dual-axis inclination sensor SICK-DTS60, with a range of ±30°, a resolution of 0.001°, and a vibration resistance of 5g, suitable for the pile foundation construction environment with strong vibration. The sensor is encapsulated by an IP67 protection level shell to prevent mud and rain from invading.

[0029] Compared with the prior art, the environmental adaptability of this system is enhanced. After the dual-axis inclination sensor replaces the plumb bob, the anti-wind disturbance ability is significantly improved (it can withstand the working conditions of a 6-level wind), and it is not affected by line-of-sight occlusion, suitable for complex working conditions such as large-scale field floors and night construction; experimental data shows that under the same wind conditions, the verticality monitoring stability is 3 times higher than that of the Bosch GLL3-80 plumb bob. The economic benefits are significant. Taking a 100,000-linear-meter pipe pile project as an example, as shown in Table 1.

[0030]

[0031] Table 1

[0032] This system can reduce: the total station transfer labor cost of about 150,000 yuan; the cost of pile replacement caused by substandard verticality of about 800,000 yuan; the cost of core sampling detection and post-processing of about 1.2 million yuan. The comprehensive cost savings are up to 2.15 million yuan, accounting for 18%-22% of the traditional construction cost.

[0033] like Figure 3 The present invention also discloses a prestressed pipe pile composite foundation construction method, which uses a prestressed pipe pile composite foundation construction monitoring auxiliary system for construction, and the specific steps are as follows:

[0034] S1. System deployment phase: A Beidou satellite positioning base station is set up at a stable position on the construction site to provide real-time dynamic differential positioning correction data; the base station is set up at a stable position on the construction site (such as hardened ground or a stable observation pier), using the FindCM satellite-based augmentation service of Qianxun Positioning to provide real-time dynamic differential (RTK) positioning correction data, with a horizontal positioning accuracy of ±8mm+1ppm and an elevation accuracy of ±15mm+1ppm; a mounting groove is set at the center of the top of the drill pipe of each mixing drill rig 1, and the Beidou receiver 3 and the verticality monitoring sensor 4 are fixedly installed through the forced centering plate 2 to ensure that the phase center of the receiver 3 antenna coincides with the axis of the drill pipe.

[0035] S2. Equipment connection and initialization: The receiver 3 and the dual-axis inclination sensor on each mixing drill rig 1 are connected to the microprocessor through a wireless communication module, and the microprocessor is connected to a data processing unit, a display screen 5 and an alarm; the receiver 3 is initialized to receive the differential correction signal of the reference station to achieve real-time dynamic high-precision positioning; the verticality monitoring sensor 4 is zero-calibrated to ensure that the initial inclination readings of the X-axis and Y-axis are zero in a stationary state.

[0036] S3. Real-time monitoring of the construction process: Positioning monitoring, receiver 3 outputs three-dimensional coordinates (X, Y, H) once per second, and the microprocessor smoothes the data through sliding window filtering (window size 5 seconds) to calculate the deviation from the design coordinates. Verticality monitoring, the dual-axis tilt sensor samples at a frequency of 100Hz, dynamically compensates for drill pipe vibration interference, and outputs real-time deflection rate (e.g., X axis 0.3° / Y axis 0.2°).

[0037] S4, dynamic warning and adjustment: after the horizontal position deviation and verticality deviation are input into the microprocessor: if the horizontal offset exceeds the first preset threshold, a first-level alarm is triggered, and the offset direction and adjustment amount are displayed on the display screen 5; if the verticality deviation exceeds the second preset threshold, a second-level alarm is triggered, and the operator is prompted to stop the machine for correction through the alarm.

[0038] S5. Data Upload: The microprocessor uploads the encrypted horizontal position deviation value and verticality deviation value to the cloud platform, and the cloud platform provides a unified historical data storage and access entry; the general server can obtain historical data through the cloud platform for subsequent quality inspection.

[0039] The above are only the preferred embodiments of the present invention that can be implemented, and do not limit the scope of rights of the present invention. Any equivalent changes made by using the content of the specification and drawings of the present invention are included in the scope of rights of the present invention.

Claims

1. A construction monitoring assistance system for a prestressed pipe pile composite foundation, characterized in that: It includes a reference station for Beidou satellite positioning, several receivers for receiving positioning information, and several mixing drills; a microprocessor is provided on each mixing drill, the microprocessor is connected to a display screen and an alarm, an installation groove is provided at the center of the top end of the drill pipe of each mixing drill, a receiver and a verticality monitoring sensor are installed in the installation groove through a forced centering plate, and the receiver and the verticality monitoring sensor are connected to the microprocessor through a wireless communication module; it also includes a general server and a cloud platform, each microprocessor is communicatively connected to the cloud platform, and the cloud platform is communicatively connected to the general server.

2. The construction monitoring assistance system for a prestressed pipe pile composite foundation according to claim 1, characterized in that: The verticality monitoring sensor uses a biaxial inclinometer.

3. The construction monitoring and auxiliary system for prestressed pipe pile composite foundation according to claim 1, wherein: The alarm uses a buzzer and an LED warning light.

4. A construction method for a prestressed pipe pile composite foundation, characterized in that, The construction is carried out using the prestressed pipe pile composite foundation construction monitoring and auxiliary system as described in any one of claims 1 to 3, and the specific steps are as follows: S1. System deployment stage: A Beidou satellite positioning reference station is erected at a stable position on the construction site to provide real-time kinematic differential positioning correction data; an installation groove is provided at the center of the top end of the drill pipe of each mixing drill, and a Beidou receiver and a verticality monitoring sensor are fixedly installed through a forced centering plate to ensure that the antenna phase center of the receiver coincides with the axis of the drill pipe. S2. Equipment connection and initialization: The receiver and the biaxial inclinometer on each mixing drill are connected to the microprocessor through a wireless communication module, and the microprocessor is connected to a data processing unit, a display screen and an alarm; the receiver is initialized to receive the differential correction signal of the reference station to achieve real-time kinematic high-precision positioning; the verticality monitoring sensor is zero-calibrated to ensure that the initial inclination readings of the X-axis and Y-axis are zero in the static state. S3. Real-time monitoring during construction: The receiver obtains the three-dimensional coordinates (X, Y, H) of the top end of the drill pipe in real time, and determines the horizontal position deviation of the drill pipe through least squares adjustment calculation; the verticality deviation is obtained through the verticality monitoring sensor. S4. Dynamic warning and adjustment: After the horizontal position deviation and the verticality deviation are input into the microprocessor: If the horizontal offset exceeds the first preset threshold, a first-level alarm is triggered, and the offset direction and adjustment amount are displayed on the display screen; if the verticality deviation exceeds the second preset threshold, a second-level alarm is triggered, and the operator is prompted to stop and correct by the alarm. S5. Data upload: The microprocessor uploads the encrypted horizontal position deviation value and verticality deviation value to the cloud platform, and the cloud platform provides a unified historical data storage and access interface; the general server can obtain the historical data through the cloud platform for subsequent quality inspection.

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