Self-adaptive dynamic pre-stressed anchor rod construction system in deep foundation pit supporting engineering

Abstract

The invention discloses a self-adaptive dynamic pre-stressed anchor rod construction system in deep foundation pit supporting engineering, relates to the technical field of deep foundation pit supporting, and aims to solve the problem that the pre-stress of an anchor rod is difficult to dynamically adjust according to real-time geological changes and foundation pit deformation conditions in the prior art. The system comprises a geological monitoring module, a foundation pit deformation monitoring module, a prestress control module, an anchor rod mounting module and a central control module, the geological monitoring module is used for monitoring the geological condition around a foundation pit in real time and transmitting data to the central control module. The foundation pit deformation monitoring module is used for monitoring the deformation condition of a foundation pit in real time and feeding back monitoring data to the central control module; the prestress control module is used for adjusting the prestress of the anchor rod; and the anchor rod mounting module is used for accurately mounting an anchor rod. The method has the advantage of dynamically adjusting the prestress in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of deep foundation pit support, and more particularly to an adaptive dynamic prestressed anchor rod construction system in a deep foundation pit support project. Background Art

[0002] With the rapid development of urban construction, deep foundation pit projects are increasing.

[0003] In deep foundation pit support, prestressed anchor rods are a commonly used support method, which maintains the stability of the foundation pit by transferring tension to stable strata.

[0004] However, under complex geological conditions, it is difficult for traditional prestressed anchor construction systems to dynamically adjust the prestress of the anchors according to real-time geological changes and foundation pit deformation, resulting in poor support effects.

[0005] In view of this, we propose an adaptive dynamic prestressed anchor construction system for deep foundation pit support engineering. Summary of the Invention

[0006] The purpose of the present invention is to provide an adaptive dynamic prestressed anchor construction system for deep foundation pit support projects, aiming to solve the problem that the existing technology is difficult to dynamically adjust the prestress of the anchor according to real-time geological changes and foundation pit deformation.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: an adaptive dynamic prestressed anchor construction system in deep foundation pit support engineering, the system comprising a geological monitoring module, a foundation pit deformation monitoring module, a prestressed anchor control module, an anchor installation module and a central control module; The geological monitoring module is used to monitor the geological conditions around the foundation pit in real time and transmit the data to the central control module; The foundation pit deformation monitoring module is used to monitor the deformation of the foundation pit in real time and feed the monitoring data back to the central control module; The prestress control module is used to adjust the prestress of the anchor rod; The anchor rod installation module is used for precise installation of anchor rods; The central control module is used to receive data from the geological monitoring module and the foundation pit deformation monitoring module, obtain the real-time prestress required for the anchor rod by analyzing and calculating the data, and then issue step-by-step control instructions to the prestress control module and the anchor rod installation module.

[0008] Preferably, the central control module adopts the formula Calculate the real-time prestress required for the anchor rod, where: is the adjustment coefficient of foundation pit deformation, is the real-time deformation of the foundation pit, is the elastic modulus of rock and soil, is the cross-sectional area of ​​the anchor rod, is the effective length of the anchor rod, Add a stress adjustment factor for geological conditions, In order to consider the additional stress caused by the change of geological conditions, is the water level change influence coefficient, is the change of groundwater level per unit time, is the monitoring time interval.

[0009] Preferably, the prestress control module includes a hydraulic oil pump, a jack and a pressure sensor, and the prestress of the anchor rod is adjusted by the hydraulic oil pump, the jack and the pressure sensor.

[0010] Preferably, the geological monitoring module also includes a data storage and anomaly identification unit for automatically storing the geological conditions around the foundation pit and the deformation of the foundation pit for 72 consecutive hours. When a sudden change occurs in the monitoring data, an abnormal signal is immediately sent to the central control module. After receiving the signal, the central control module gives priority to adjusting the anchor prestress in the area.

[0011] Preferably, the anchor rod installation module includes a drilling device and an anchor rod pushing device, the drilling device is used to accurately drill holes on the foundation pit wall, and the anchor rod pushing device is used to accurately and smoothly send the anchor rod into the drilled hole.

[0012] Preferably, it also includes an early warning module, which is connected to the central control module. Through the preset safety threshold, when the central control module analyzes and finds that the geological monitoring data, foundation pit deformation data or anchor rod prestress value exceeds the preset safety threshold, the early warning module immediately issues a warning signal.

[0013] Preferably, during the prestress adjustment process, the pressure sensor collects the actual prestress value of the anchor rod in real time and feeds it back to the central control module. The central control module dynamically corrects the next adjustment instruction based on the difference between the feedback value and the calculated real-time prestress.

[0014] Preferably, the anchor installation module also includes a positioning and navigation unit and an attitude adjustment mechanism. The positioning and navigation unit obtains the three-dimensional coordinate information of the drilling equipment and the anchor pushing device in real time based on the Beidou satellite positioning system. The attitude adjustment mechanism is used to adjust the inclination angle and propulsion direction of the drilling equipment and the anchor pushing device.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention obtains the surrounding geological conditions and foundation pit deformation data in real time through the geological monitoring module and the foundation pit deformation monitoring module. Based on these real-time data, the central control module calculates the real-time prestress required for the anchor rod using a formula that integrates the influence of foundation pit deformation, geological additional stress and water level changes, and dynamically adjusts it through the prestress control module. This solves the problem that the existing technology is difficult to dynamically adjust the anchor rod prestress according to real-time changes under complex geological conditions, resulting in poor support effect. It ensures that the anchor rod prestress always matches the actual working conditions, significantly improving the stability and reliability of deep foundation pit support.

[0016] 2. During the prestress adjustment process of the present invention, the pressure sensor collects the actual prestress value in real time and feeds it back to the central control module. The central control module dynamically corrects the next adjustment instruction based on the difference between the feedback value and the calculated value. At the same time, when the prestress difference to be adjusted exceeds the threshold, a step-by-step loading and unloading method is used to gradually approach the target value, avoiding the impact of sudden changes in prestress on the support structure and ensuring the accuracy and stability of the adjustment process.

[0017] 3. The early warning module in the present invention can immediately issue an early warning signal when the geological monitoring data, foundation pit deformation data or anchor prestress value exceeds the preset safety threshold. At the same time, the abnormality recognition unit of the geological monitoring module can send an abnormal signal to the central control module when the monitoring data suddenly changes, ensuring that the central control module gives priority to the adjustment of the anchor prestress in the area, greatly improving the risk perception and emergency response capabilities during the construction process, and reducing the probability of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the system architecture of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1 like Figure 1 As shown, an adaptive dynamic prestressed anchor construction system in a deep foundation pit support project includes a geological monitoring module, a foundation pit deformation monitoring module, a prestressed anchor control module, an anchor installation module, and a central control module; The geological monitoring module is used to monitor the geological conditions around the foundation pit in real time and transmit the data to the central control module to realize real-time monitoring of geological condition changes, provide geological basis for the central control module to adjust the anchor prestress, and avoid support failure due to geological mutations; The foundation pit deformation monitoring module is used to monitor the deformation of the foundation pit in real time and feed the monitoring data back to the central control module to capture the foundation pit deformation data in a timely manner, directly reflecting the stress state of the support system. It is the core basis for calculating the real-time prestress of the anchor rods, ensuring that the support strength matches the deformation risk. The prestress control module is used to adjust the anchor rod prestress to achieve dynamic changes in anchor rod prestress according to the instructions of the central control module, so that the support force always adapts to the deformation of the foundation pit and geological changes, avoiding the risk of anchor rod overload caused by excessive prestress or collapse caused by too weak prestress; The anchor installation module is used for precise installation of anchors to ensure the anchors are secure, providing a stable foundation for subsequent prestressing adjustments and improving the overall reliability of the support system. The central control module is used to receive data from the geological monitoring module and the foundation pit deformation monitoring module, and obtain the real-time prestress required for the anchor rod by analyzing and calculating the data. It then issues step-by-step control instructions to the prestress control module and the anchor rod installation module to integrate multi-source monitoring data and quantitatively calculate real-time prestress, thereby realizing intelligent control of the construction process, coordinating the collaborative work of various modules, and improving support accuracy and efficiency.

[0021] Furthermore, the central control module uses the formula Calculate the real-time prestress required for the anchor rod, where: is the adjustment coefficient of foundation pit deformation, is the real-time deformation of the foundation pit, is the elastic modulus of rock and soil, is the cross-sectional area of ​​the anchor rod, is the effective length of the anchor rod, Add a stress adjustment factor for geological conditions, In order to consider the additional stress caused by the change of geological conditions, is the water level change influence coefficient, is the change of groundwater level per unit time, To monitor the time interval, the formula first derives the prestress component required due to pit deformation based on Hooke's law. , and then according to the relationship between stress and force, the prestress component required for additional stress due to geological conditions is obtained , and then combine the influence of groundwater level change on anchor force to deduce the relevant components Finally, the three components are added together to obtain the total real-time prestress formula. ( When the prestressing force reaches the preset prestressing value, the central control module sends a step-by-step adjustment instruction to the prestressing control module, and the actual prestressing force gradually approaches the calculated value by loading and unloading in stages. , in order to achieve smooth and accurate force control.

[0022] Furthermore, the prestress control module includes a hydraulic oil pump, a jack and a pressure sensor. The prestress of the anchor rod is adjusted through the hydraulic oil pump, the jack and the pressure sensor to achieve stable power output with the hydraulic oil pump, the precise loading and unloading of the prestress by the jack, and the real-time feedback of the actual force value by the pressure sensor to form a closed-loop control to ensure that the adjusted prestress is consistent with the target value.

[0023] Furthermore, the geological monitoring module also includes a data storage and anomaly identification unit, which is used to automatically store the geological conditions around the foundation pit and the deformation of the foundation pit for 72 consecutive hours. When a sudden change occurs in the monitoring data, an abnormal signal is immediately sent to the central control module. After receiving the signal, the central control module gives priority to adjusting the prestress of the anchor rods in the area, so as to achieve 72 hours of data storage to facilitate the tracing of geological change trends, anomaly identification to quickly respond to sudden geological events, and give priority to adjusting the prestress of the corresponding area to minimize safety risks.

[0024] Furthermore, the anchor rod installation module includes a drilling device and an anchor rod pushing device. The drilling device is used to accurately drill holes on the foundation pit wall. The anchor rod pushing device is used to accurately and smoothly send the anchor rod into the drilled hole to ensure the anchor rod installation position by precise drilling. The pushing device ensures that the anchor rod enters the hole smoothly and has a stable posture, avoiding the impact of installation deviation on the prestress transfer efficiency.

[0025] Furthermore, it also includes an early warning module, which is connected to the central control module. Through the preset safety threshold, when the central control module analyzes and finds that the geological monitoring data, foundation pit deformation data or anchor rod prestress value exceeds the preset safety threshold, the early warning module immediately issues a warning signal to achieve early warning when the geological, deformation or prestress data approaches the dangerous value, so as to gain processing time for construction personnel, avoid safety accidents, and improve the safety of engineering construction.

[0026] Furthermore, during the prestress adjustment process, the pressure sensor collects the actual prestress value of the anchor rod in real time and feeds it back to the central control module. The central control module dynamically corrects the next adjustment instruction based on the difference between the feedback value and the calculated real-time prestress, so as to continuously correct the adjustment instruction through real-time feedback, offset the error, ensure that the actual prestress accurately approaches the calculated value, and improve the control accuracy.

[0027] Furthermore, the anchor installation module also includes a positioning and navigation unit and an attitude adjustment mechanism. The positioning and navigation unit obtains the three-dimensional coordinate information of the drilling equipment and the anchor pushing device in real time based on the Beidou satellite positioning system. The attitude adjustment mechanism is used to adjust the inclination angle and propulsion direction of the drilling equipment and the anchor pushing device to achieve Beidou positioning to ensure the drilling position and ensure the optimal force direction of the anchor, thereby maximizing the support effect.

[0028] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An adaptive dynamic prestressed anchor construction system in deep foundation pit support engineering, characterized in that: The system includes a geological monitoring module, a foundation pit deformation monitoring module, a prestress control module, an anchor installation module, and a central control module; The geological monitoring module is used to monitor the geological conditions around the foundation pit in real time and transmit the data to the central control module; The foundation pit deformation monitoring module is used to monitor the deformation of the foundation pit in real time and feed the monitoring data back to the central control module; The prestress control module is used to adjust the prestress of the anchor rod; The anchor rod installation module is used for precise installation of anchor rods; The central control module is used to receive data from the geological monitoring module and the foundation pit deformation monitoring module, obtain the real-time prestress required for the anchor rod by analyzing and calculating the data, and then issue step-by-step control instructions to the prestress control module and the anchor rod installation module.

2. The adaptive dynamic prestressed anchor construction system in a deep foundation pit support project according to claim 1 is characterized in that: The central control module adopts the formula Calculate the real-time prestress required for the anchor rod, where: is the adjustment coefficient of foundation pit deformation, is the real-time deformation of the foundation pit, is the elastic modulus of rock and soil, is the cross-sectional area of ​​the anchor rod, is the effective length of the anchor rod, Add a stress adjustment factor for geological conditions, In order to consider the additional stress caused by the change of geological conditions, is the water level change influence coefficient, is the change of groundwater level per unit time, is the monitoring time interval.

3. The adaptive dynamic prestressed anchor construction system in a deep foundation pit support project according to claim 1 is characterized in that: The prestress control module includes a hydraulic oil pump, a jack and a pressure sensor, and the prestress of the anchor rod is adjusted through the hydraulic oil pump, the jack and the pressure sensor.

4. The adaptive dynamic prestressed anchor construction system in a deep foundation pit support project according to claim 1, characterized in that: The geological monitoring module also includes a data storage and anomaly identification unit, which is used to automatically store the geological conditions around the foundation pit and the deformation of the foundation pit for 72 consecutive hours. When a sudden change occurs in the monitoring data, an abnormal signal is immediately sent to the central control module. After receiving the signal, the central control module gives priority to adjusting the anchor prestress in the area.

5. The adaptive dynamic prestressed anchor construction system in deep foundation pit support engineering according to claim 1, characterized in that: The anchor rod installation module includes a drilling device and an anchor rod pushing device. The drilling device is used to accurately drill holes on the foundation pit wall, and the anchor rod pushing device is used to accurately and smoothly send the anchor rod into the drilled hole.

6. The adaptive dynamic prestressed anchor construction system in deep foundation pit support engineering according to claim 1, characterized in that: It also includes an early warning module, which is connected to the central control module. Through the preset safety threshold, when the central control module analyzes and finds that the geological monitoring data, foundation pit deformation data or anchor rod prestress value exceeds the preset safety threshold, the early warning module immediately issues a warning signal.

7. The adaptive dynamic prestressed anchor construction system in deep foundation pit support engineering according to claim 3, characterized in that: During the prestressing adjustment process, the pressure sensor collects the actual prestressing value of the anchor rod in real time and feeds it back to the central control module. The central control module dynamically corrects the next adjustment instruction based on the difference between the feedback value and the calculated real-time prestressing value.

8. The adaptive dynamic prestressed anchor construction system in deep foundation pit support engineering according to claim 5, characterized in that: The anchor installation module also includes a positioning and navigation unit and an attitude adjustment mechanism. The positioning and navigation unit obtains the three-dimensional coordinate information of the drilling equipment and the anchor pushing device in real time based on the Beidou satellite positioning system. The attitude adjustment mechanism is used to adjust the inclination angle and propulsion direction of the drilling equipment and the anchor pushing device.

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