Comprehensive pipe gallery underground diaphragm wall deformation risk early warning system

Abstract

The invention, which relates to the technical field of the underground diaphragm wall, discloses a comprehensive pipe gallery underground diaphragm wall deformation risk early warning system comprising a data acquisition module, a data analysis module, a risk early warning module, an external environment monitoring module and a real-time monitoring module. The data analysis module is used for analyzing the continuous wall data collected by the data acquisition module, and the data analysis module comprises a deformation prediction unit, a soil stress detection unit and a deformation comprehensive evaluation unit. The soil stress detection unit is combined with the soil pressure and the internal stress of the wall body to perform quantitative analysis on the mechanical property of the underground diaphragm wall, so that the interaction between the soil and the underground structure can be quantified, finally, the deformation comprehensive evaluation unit is used for performing comprehensive evaluation, and different risk levels are set for the result. The early warning effect is achieved, the deformation risk early warning quality is improved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of underground continuous walls, and in particular to a deformation risk early warning system for underground continuous walls of a comprehensive pipe gallery. Background Art

[0002] An urban integrated pipeline corridor refers to a tunnel space built underground in the city, which integrates various engineering pipelines such as electricity, communications, heat, and water supply. The ground attachments are facilities such as outlets and vents. The underground continuous wall is a foundation project that uses a trenching machine on the ground to dig a long and narrow deep trench. After the trench is cleaned, a steel cage is suspended in the trench, and then underwater concrete is poured using the backflow method to build a unit trench section. This is done section by section to build a continuous reinforced concrete wall underground as a water interception, anti-seepage, load-bearing, and water-retaining structure. The underground continuous wall is the most widely used form of foundation pit retaining structure, and monitoring the deformation of the underground continuous wall has also become an important part of foundation pit monitoring.

[0003] In actual construction, the measured horizontal displacement of underground continuous walls is sometimes greater than the design limit. The interaction between soil and underground structures is difficult to quantify accurately, which makes the prediction of the deformation trend of underground structures inaccurate. As a result, the safety status assessment of underground continuous walls mostly relies on the construction experience of engineering and technical personnel, lacks quantitative analysis of mechanical properties, reduces the quality of deformation risk warning, and increases safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a deformation risk early warning system for underground continuous walls of a comprehensive pipe gallery, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a risk early warning system for deformation of underground continuous walls of a comprehensive pipe gallery, comprising a data acquisition module, a data analysis module, a risk early warning module, an external environment monitoring module and a real-time monitoring module; The data analysis module is used to analyze the continuous wall data collected by the data acquisition module to predict the risk of the underground continuous wall. The data analysis module includes a deformation prediction unit, a soil stress detection unit and a deformation comprehensive evaluation unit; The deformation prediction unit is used to analyze the continuous wall data to obtain the deformation rate V at time t+1 t+1 The soil stress detection unit combines the soil pressure and the internal stress of the wall to obtain the underground continuous wall stress index S, which indicates the influence of the soil pressure on the wall. The deformation comprehensive evaluation unit is used to combine the deformation prediction unit and the soil stress detection unit to comprehensively evaluate the deformation risk of the underground continuous wall and obtain the comprehensive evaluation value R at time t+1. t+1 , and according to the comprehensive evaluation value R t+1Set different risk levels to achieve early warning effects; The risk warning module is used to send warning information to on-site construction personnel and back-end management personnel according to the risk level.

[0006] Optionally, the external environment monitoring module obtains temperature, precipitation, and wind speed data through a weather forecast interface, and obtains real-time vibration data through an earthquake monitoring network.

[0007] Optionally, the deformation prediction unit predicts the process as follows:

[0008] Where V t+1 is the deformation rate at time t+1; V t is the deformation rate at the current time; V t－1 is the deformation rate at time t-1; α is the deformation rate influence coefficient, which is 0.7; H t is the groundwater level at the current time, H 0 is the initial water level; H t－1 is the groundwater level H at time t-1; β is the groundwater level influence coefficient, ranging from 0 to 1; Specific:

[0009] Where X t is the current wall displacement; X t-1 is the wall displacement at time t-1; Δt is the time interval; By combining the historical deformation rate and groundwater level changes, the deformation rate of the underground continuous wall in the future is predicted.

[0010] Optionally, the soil stress detection unit calculation process is as follows:

[0011] Where S t is the current underground continuous wall stress index; P soil is soil pressure; A con is the contact area between soil and underground continuous wall; P wall is the internal stress of the underground continuous wall; A wall is the stress action area inside the underground continuous wall; Cwall is the bearing capacity of underground continuous wall; The underground continuous wall stress index S is used to quantify the interaction between soil pressure and the internal stress of the underground continuous wall. When the underground continuous wall stress index S is high, it means that the interaction between soil pressure and the internal stress of the underground continuous wall is strong, and the risk of wall deformation and damage increases.

[0012] Optionally, the deformation comprehensive evaluation unit evaluates the process as follows:

[0013] Where R t+1 is the comprehensive evaluation value at time t+1, and R is the comprehensive evaluation value; V t+1 is the deformation rate at time t+1; V limit is the maximum deformation rate; W 1 is the deformation rate weight, which is 0.4; D is the deformation fluctuation value; W 2 is the deformation fluctuation weight, with a value of 0.3; S t is the current underground continuous wall stress index; S limit is the maximum underground diaphragm wall stress; W 3 is the stress weight of underground continuous wall, which is 0.3; Specific:

[0014] Where V i is the deformation rate at the i-th time point; V avg is the average value of deformation rate at all time points; N is the number of time points; The deformation fluctuation value D indicates the fluctuation of the deformation rate of the underground continuous wall. The larger the deformation fluctuation value D is, the more drastic the deformation rate change is and the more unstable the deformation trend is. The comprehensive assessment value R indicates the current deformation risk of the underground continuous wall, and the risk level is set according to the comprehensive assessment value R, specifically: When 0<R≤0.3, it is low risk; When 0.3<R≤0.5, it is medium-low risk; When 0.5<R≤0.7, it is medium risk; When R>0.7, it is high risk; By setting a risk level for the comprehensive assessment value R, timely response measures can be taken according to the predicted results of the underground continuous wall deformation risk.

[0015] Optionally, when 0.5<R≤0.7, it indicates that the underground continuous wall deformation risk warning system is at a higher risk level. At this time, the deformation rate of the wall is large and may accelerate. At this time, the deformation rate influence coefficient α in the deformation prediction unit is adjusted to respond to the underground continuous wall deformation risk more accurately and timely, specifically:

[0016] When 0.5<R≤0.7, by increasing the deformation rate influence coefficient α, it can be adjusted in real time according to the prediction results of the current underground continuous wall deformation risk.

[0017] Optionally, the risk warning module is used to send warning information to on-site construction personnel and back-end management personnel according to the set risk level. The on-site construction personnel can set up warning lights on site to provide reminders, and set different colors for the warning lights to correspond to different risk levels, so that the on-site construction personnel can quickly understand the current risk warning situation. At the same time, text messages are sent to the back-end management personnel's terminal devices according to different risk levels.

[0018] Optionally, the real-time monitoring module is used to visualize the data collected by the data acquisition module and the results of the data analysis module, and use a display device to display them in real time, and combine with video monitoring equipment to provide a real-time video stream of the on-site construction area.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention analyzes the continuous wall data by combining the historical deformation rate and groundwater level change through the deformation prediction unit to obtain the deformation rate V at time t+1 t+1 , so as to quantify the deformation rate of the future underground continuous wall. Then, the soil stress detection unit combines the soil pressure and the internal stress of the wall to obtain the underground continuous wall stress index S, and conducts a quantitative analysis of the mechanical properties of the underground continuous wall, so that the interaction between the soil and the underground structure can be quantified, and the accuracy of the prediction of the deformation trend of the underground structure can be improved. Finally, the deformation comprehensive evaluation unit is used to combine the deformation rate V at time t+1 t+1 , underground continuous wall stress index S and other influencing factors to comprehensively evaluate the deformation risk of underground continuous wall, and obtain the comprehensive evaluation value R at time t+1 t+1 , and through the comprehensive evaluation value R t+1 Set different risk levels and implement corresponding measures according to different risk levels to achieve early warning effects, avoid relying solely on the construction experience of engineering and technical personnel, improve the quality of deformation risk warnings, and reduce safety hazards.

[0020] 2. When the comprehensive evaluation value R is at a medium risk level, the present invention increases the deformation rate influence coefficient α so that it can be adjusted in real time according to the prediction results of the current underground continuous wall deformation risk, thereby improving the response sensitivity to the underground continuous wall deformation, being able to timely capture the rapid changes in the deformation rate, and providing more timely and effective early warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a block diagram of the system module of the present invention; Figure 2 This is a block diagram of the data analysis module of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In actual construction, the measured horizontal displacement of underground continuous walls is sometimes greater than the design limit. The interaction between soil and underground structures is difficult to quantify accurately, which makes the prediction of the deformation trend of underground structures inaccurate. As a result, the safety status assessment of underground continuous walls mostly relies on the construction experience of engineering and technical personnel, lacks quantitative analysis of mechanical properties, reduces the quality of deformation risk warning, and increases safety hazards.

[0024] For example, see Figure 1 and Figure 2 ,This implementation provides a comprehensive pipe gallery underground continuous wall deformation risk early warning system, including a data acquisition module, a data analysis module, a risk early warning module, an external environment monitoring module and a real-time monitoring module; The data analysis module is used to analyze the continuous wall data collected by the data acquisition module and predict the risk of the underground continuous wall. The data analysis module includes a deformation prediction unit, a soil stress detection unit and a deformation comprehensive evaluation unit; The deformation prediction unit is used to analyze the continuous wall data and obtain the deformation rate V at time t+1 t+1 The soil stress detection unit combines soil pressure and internal wall stress to obtain the underground continuous wall stress index S, which indicates the influence of soil pressure on the wall. The deformation comprehensive evaluation unit is used to combine the deformation prediction unit and the soil stress detection unit to comprehensively evaluate the deformation risk of the underground continuous wall and obtain the comprehensive evaluation value R at time t+1. t+1 , and according to the comprehensive evaluation value R t+1 Set different risk levels to achieve early warning effects; The risk warning module is used to send warning information to on-site construction personnel and back-end management personnel according to the risk level.

[0025] In this embodiment, the data acquisition module uses sensor equipment to collect the underground continuous wall data of the comprehensive pipe gallery in real time, and uses the deformation prediction unit to analyze the continuous wall data to obtain the deformation rate V at time t+1. t+1 , so as to quantify the deformation rate of the future underground continuous wall, which is convenient for construction technicians to predict the deformation of the underground continuous wall. Then, the soil stress detection unit combines the soil pressure and the internal stress of the wall to obtain the underground continuous wall stress index S. By quantitatively analyzing the mechanical properties of the underground continuous wall, the interaction between the soil and the underground structure can be quantified, which improves the accuracy of the prediction of the deformation trend of the underground structure. Finally, the deformation comprehensive evaluation unit is used to combine the deformation rate V at time t+1 t+1 , underground continuous wall stress index S and other influencing factors to comprehensively evaluate the deformation risk of underground continuous wall, and obtain the comprehensive evaluation value R at time t+1 t+1 , and through the comprehensive evaluation value R t+1 Different risk levels are set and corresponding measures are implemented according to different risk levels to achieve early warning effects, thereby avoiding relying solely on the construction experience of engineering and technical personnel, improving the quality of deformation risk warnings, and reducing safety hazards.

[0026] Furthermore, the external environment monitoring module obtains temperature, precipitation, and wind speed data through a weather forecast interface, and obtains real-time vibration data through an earthquake monitoring network.

[0027] Specifically, temperature changes can cause thermal expansion and contraction of materials, especially common building materials such as metal, concrete, and steel. If the temperature changes drastically, it may cause the building to shrink or expand, affecting the deformation rate of the wall. Too much or too little precipitation will change the moisture and structure of the soil, causing soil settlement or expansion, thereby affecting the foundation deformation of the building. High wind speeds may cause additional mechanical loads on the building structure and may aggravate wall deformation. Seismic activity may cause a sharp change in the deformation trend of the building and may even distort the original predicted trend. Therefore, in actual construction, a threshold value is set for the external environment according to the situation of the underground continuous wall. When the threshold value is exceeded, information is sent to the management personnel in a timely manner for timely processing to reduce damage to the underground continuous wall.

[0028] Furthermore, the prediction process of the deformation prediction unit is as follows:

[0029] Where V t+1 is the deformation rate at time t+1; V tis the deformation rate at the current time; V t－1 is the deformation rate at time t-1; α is the deformation rate influence coefficient, which is 0.7; H t is the groundwater level at the current time, H 0 is the initial water level; H t－1 is the groundwater level H at time t-1; β is the groundwater level influence coefficient, ranging from 0 to 1; Specific:

[0030] Where X t is the current wall displacement; X t-1 is the wall displacement at time t-1; Δt is the time interval; Specifically, by combining the historical deformation rate and groundwater level changes, the deformation rate of the underground continuous wall in the future is predicted, abnormal deformation is discovered in time, and the response speed of engineering safety management is improved.

[0031] Furthermore, the calculation process of the soil stress detection unit is as follows:

[0032] Where S t is the current underground continuous wall stress index; P soil is soil pressure; A con is the contact area between soil and underground continuous wall; P wall is the internal stress of the underground continuous wall; A wall is the stress action area inside the underground continuous wall; C wall is the bearing capacity of underground continuous wall; Specifically, the underground continuous wall stress index S is used to quantify the interaction between soil pressure and the internal stress of the underground continuous wall. When the underground continuous wall stress index S is high, it means that the interaction between soil pressure and the internal stress of the underground continuous wall is strong, and the risk of deformation and damage of the wall increases. By quantitatively analyzing the mechanical properties of the underground continuous wall and quantifying the results, it is convenient for management personnel to quickly understand the current stress conditions of the underground continuous wall, which provides a basis for evaluating the deformation trend of the underground continuous wall and improves the accuracy of predicting the deformation trend of the underground continuous wall.

[0033] Furthermore, the evaluation process of the deformation comprehensive evaluation unit is as follows:

[0034] Where R t+1 is the comprehensive evaluation value at time t+1, and R is the comprehensive evaluation value; V t+1 is the deformation rate at time t+1; V limit is the maximum deformation rate; W 1 is the deformation rate weight, which is 0.4; D is the deformation fluctuation value; W 2 is the deformation fluctuation weight, with a value of 0.3; S t is the current underground continuous wall stress index; S limit is the maximum underground diaphragm wall stress; W 3 is the stress weight of underground continuous wall, which is 0.3; Specific:

[0035] Where V i is the deformation rate at the i-th time point; V avg is the average value of deformation rate at all time points; N is the number of time points; The deformation fluctuation value D indicates the fluctuation of the deformation rate of the underground continuous wall. The larger the deformation fluctuation value D is, the more drastic the deformation rate change is and the more unstable the deformation trend is. The comprehensive assessment value R indicates the current deformation risk of the underground continuous wall, and the risk level is set according to the comprehensive assessment value R, specifically: When 0<R≤0.3, it is low risk; Countermeasures: Maintain regular inspection and maintenance to ensure that construction activities do not have adverse effects on the wall and avoid external factors aggravating deformation; When 0.3<R≤0.5, it is medium-low risk; Countermeasures include increasing the monitoring time interval, reducing the intensity and speed of construction activities, and avoiding further disturbance of the wall by transient loads; When 0.5<R≤0.7, it is medium risk; Countermeasures: Add monitoring sensors to collect data in real time, especially the deformation rate of the wall and soil pressure, and handle abnormal data in a timely manner; locally reinforce the wall to enhance its stability; When R>0.7, it is high risk; Countermeasures: notify on-site staff to take emergency reinforcement measures, including temporary support, steel reinforcement, grouting, etc., stop all construction activities except emergency reinforcement measures, organize the evacuation of relevant personnel, and monitor the wall deformation in real time.

[0036] Specifically, by setting a risk level for the comprehensive assessment value R, timely response measures can be taken according to the predicted results of the underground continuous wall deformation risk to avoid the expansion of damage.

[0037] Specifically, the deformation comprehensive evaluation unit is used to combine the deformation rate V at time t+1 t+1 , underground continuous wall stress index S and deformation fluctuation value D are used to comprehensively evaluate the deformation risk of underground continuous wall, and the comprehensive evaluation value R of quantitative time t+1 is obtained. t+1 , and through the comprehensive evaluation value R t+1 Set different risk levels and implement corresponding measures according to different risk levels to achieve early warning effects. Analyze actual data to avoid relying solely on the construction experience of engineering and technical personnel, improve the quality of deformation risk warnings, and reduce safety hazards.

[0038] Furthermore, when 0.5<R≤0.7, it indicates that the underground continuous wall deformation risk warning system is at a higher risk level. At this time, the deformation rate of the wall is large and may accelerate. At this time, the deformation rate influence coefficient α in the deformation prediction unit is adjusted to respond to the underground continuous wall deformation risk more accurately and timely. Specifically:

[0039] When 0.5<R≤0.7, by increasing the deformation rate influence coefficient α, it can be adjusted in real time according to the prediction results of the current underground continuous wall deformation risk, thereby improving the response sensitivity to the underground continuous wall deformation, being able to timely capture the rapid changes in the deformation rate, and providing more timely and effective early warning.

[0040] Furthermore, the risk warning module is used to send warning information to on-site construction personnel and back-end management personnel according to the set risk level. On-site construction personnel set up warning lights on site to provide reminders, and set different colors for the warning lights to correspond to different risk levels, so that on-site construction personnel can quickly understand the current risk warning situation. At the same time, text messages are sent to the back-end management personnel's terminal devices according to different risk levels.

[0041] Specifically, the intuitive transmission of color simplifies the information transmission process. Especially when the construction site is noisy, on-site construction workers can intuitively understand the current risk level through the color changes of the warning lights, quickly judge the safety status of the site, and take response measures according to the situation to avoid the expansion of the disaster and reduce casualties.

[0042] Furthermore, the real-time monitoring module is used to visualize the data collected by the data acquisition module and the results of the data analysis module, and use a display device to display them in real time, and in combination with video monitoring equipment, provide a real-time video stream of the on-site construction area.

[0043] Specifically, by visualizing the data collected by the data acquisition module and the results of the data analysis module, such as using a line graph, managers can more intuitively understand the deformation of the underground continuous wall so that they can take timely response measures.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deformation risk early warning system for underground continuous walls of a comprehensive pipe gallery, characterized in that: It includes data collection module, data analysis module, risk warning module, external environment monitoring module and real-time monitoring module; The data analysis module is used to analyze the continuous wall data collected by the data acquisition module to predict the risk of the underground continuous wall. The data analysis module includes a deformation prediction unit, a soil stress detection unit and a deformation comprehensive evaluation unit; The deformation prediction unit is used to analyze the continuous wall data to obtain the deformation rate V at time t+1 t+1 The soil stress detection unit combines the soil pressure and the internal stress of the wall to obtain the underground continuous wall stress index S, which indicates the influence of the soil pressure on the wall. The deformation comprehensive evaluation unit is used to combine the deformation prediction unit and the soil stress detection unit to comprehensively evaluate the deformation risk of the underground continuous wall and obtain the comprehensive evaluation value R at time t+1. t+1 , and according to the comprehensive evaluation value R t+1 Set different risk levels to achieve early warning effects; The risk warning module is used to send warning information to on-site construction personnel and back-end management personnel according to the risk level.

2. The deformation risk early warning system for underground continuous wall of comprehensive pipe gallery according to claim 1 is characterized by: The external environment monitoring module obtains temperature, precipitation, and wind speed data through a weather forecast interface, and obtains real-time vibration data through an earthquake monitoring network.

3. The deformation risk early warning system for underground continuous wall of comprehensive pipe gallery according to claim 2 is characterized by: The prediction process of the deformation prediction unit is as follows: Where V t+1 is the deformation rate at time t+1; V t is the deformation rate at the current time; V t－1 is the deformation rate at time t-1; α is the deformation rate influence coefficient, which is 0.7; H t is the groundwater level at the current time, H0 is the initial water level; H t－1 is the groundwater level H at time t-1; β is the groundwater level influence coefficient, ranging from 0 to 1; Specific: Where X t is the current wall displacement; X t-1 is the wall displacement at time t-1; Δt is the time interval; By combining the historical deformation rate and groundwater level changes, the deformation rate of the underground continuous wall in the future is predicted.

4. The deformation risk early warning system for underground continuous wall of comprehensive pipe gallery according to claim 3 is characterized by: The calculation process of the soil stress detection unit is as follows: Where S t is the current underground continuous wall stress index; P soil is soil pressure; A con is the contact area between soil and underground continuous wall; P wall is the internal stress of the underground continuous wall; A wall is the stress action area inside the underground continuous wall; C wall is the bearing capacity of underground continuous wall; The underground continuous wall stress index S is used to quantify the interaction between soil pressure and the internal stress of the underground continuous wall. When the underground continuous wall stress index S is high, it means that the interaction between soil pressure and the internal stress of the underground continuous wall is strong, and the risk of wall deformation and damage increases.

5. The deformation risk early warning system for underground continuous wall of comprehensive pipe gallery according to claim 4 is characterized by: The evaluation process of the deformation comprehensive evaluation unit is as follows: Where R t+1 is the comprehensive evaluation value at time t+1, and R is the comprehensive evaluation value; V t+1 is the deformation rate at time t+1; V limit is the maximum deformation rate; W1 is the deformation rate weight, which is 0.4; D is the deformation fluctuation value; W2 is the deformation fluctuation weight, which is 0.3; S t is the current underground continuous wall stress index; S limit is the maximum underground diaphragm wall stress; W3 is the stress weight of underground continuous wall, which is 0.3; Specific: Where V i is the deformation rate at the i-th time point; V avg is the average value of deformation rate at all time points; N is the number of time points; The deformation fluctuation value D indicates the fluctuation of the deformation rate of the underground continuous wall. The larger the deformation fluctuation value D is, the more drastic the deformation rate change is and the more unstable the deformation trend is. The comprehensive assessment value R indicates the current deformation risk of the underground continuous wall, and the risk level is set according to the comprehensive assessment value R, specifically: When 0<R≤0.3, it is low risk; When 0.3<R≤0.5, it is medium-low risk; When 0.5<R≤0.7, it is medium risk; When R>0.7, it is high risk; By setting a risk level for the comprehensive assessment value R, timely response measures can be taken according to the predicted results of the underground continuous wall deformation risk.

6. The deformation risk early warning system for underground continuous wall of comprehensive pipe gallery according to claim 5 is characterized by: When 0.5<R≤0.7, it means that the underground continuous wall deformation risk warning system is at a high risk level. At this time, the deformation rate of the wall is large and may accelerate. At this time, the deformation rate influence coefficient α in the deformation prediction unit is adjusted to respond to the underground continuous wall deformation risk more accurately and timely. Specifically: When 0.5<R≤0.7, by increasing the deformation rate influence coefficient α, it can be adjusted in real time according to the prediction results of the current underground continuous wall deformation risk.

7. The deformation risk early warning system for underground continuous wall of comprehensive pipe gallery according to claim 1 is characterized by: The risk warning module is used to send warning information to on-site construction personnel and back-end management personnel according to the set risk level. On-site construction personnel set up warning lights on site to provide reminders, and set different colors for the warning lights to correspond to different risk levels, so that on-site construction personnel can quickly understand the current risk warning situation. At the same time, text messages are sent to the back-end management personnel's terminal devices according to different risk levels.

8. The deformation risk early warning system for underground continuous wall of comprehensive pipe gallery according to claim 1 is characterized by: The real-time monitoring module is used to visualize the data collected by the data acquisition module and the results of the data analysis module, and use a display device to display them in real time, and combine with video monitoring equipment to provide a real-time video stream of the on-site construction area.

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