Urban built-up area shield method construction environment risk intelligent evaluation digital twin system

Abstract

The application discloses a kind of urban built area shield method construction environment risk intelligent evaluation digital twin systems.The system includes: environmental information perception module, construction information perception module, construction influence information perception module, digital twin simulation deduction module, risk loss evaluation module and risk assessment and countermeasure module.The application can improve the scientificity of environmental risk assessment, realize the visualization and quantification of risk assessment, and make real-time decisions for different risk levels, reducing the safety risk problems caused by damage to existing buildings during construction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield tunnel construction, in particular to an intelligent assessment digital twin system for environmental risks of shield method construction in urban built-up areas. BACKGROUND

[0002] With the development of China's economic level and urbanization process, the traffic pressure is rising year by year, and tunnels are widely used as an important solution to urban traffic diseases. Due to the limited nature of urban underground space, in order to efficiently utilize space, more and more tunnel projects are constructed in close proximity underground, and parallel, overlapping (close proximity overlap) and extremely shallow buried tunnel projects are emerging. At the same time, the disturbance of intensive tunnel excavation to the stratum also increases geometrically, and the risk accidents of road collapse, underground pipeline burst and house collapse caused thereby are common.

[0003] Especially in urban built-up areas, because vehicles have a certain slope limit, the overburden of tunnels constructed in limited space is often shallow, which poses a great challenge to ground settlement control and also brings high risk to the surrounding environment. In order to ensure the safety of the public and the environment, it is necessary to conduct sufficient risk identification and assessment before and during construction, to make reasonable early warning for high-risk projects, to develop risk response measures, to estimate and evaluate the risk loss, and to ensure that the risk loss is within the scope of enterprise units.

[0004] The purpose of environmental risk assessment and loss evaluation of urban built-up area tunnel shield method excavation construction is: 1. Identify the environmental risk categories caused by tunnel construction; 2. Estimate the risk probability of each environmental risk category; 3. Evaluate the risk loss of each environmental risk category; 4. Determine the risk level of each risk category and propose response methods for different risk levels.

[0005] Environmental risk assessment is an indispensable important link for shield tunnel construction, and scientific and reasonable risk assessment work can avoid unnecessary major losses and social negative impacts during the construction period. In the urban built-up area, the overlying existing buildings, roads and pipeline layout of the tunnel are very complex, and the tunnel is often shallow in depth due to the need for use, so the excavation of the shield tunnel inevitably disturbs the stratum and causes stratum subsidence, thereby affecting the normal use function of the overlying existing buildings and even destroying them. Therefore, it is necessary to identify, assess, warn and develop targeted plans for the possible environmental risks before and during the construction of the tunnel project, and to evaluate the risk loss. However, because of the complexity of the underground geotechnical properties and distribution, the seasonal flow of groundwater and the uncertainty of the shield excavation parameters, the conventional environmental risk assessment method cannot well combine the construction process for quantitative evaluation, and often relies on risk checklists and expert engineering experience for evaluation, which is qualitative, empirical and timed, and is easy to cause environmental risk assessment omissions and unable to accurately propose risk avoidance measures, causing construction risks, increasing civil property compensation amounts, or being too conservative, causing construction resource waste. SUMMARY

[0006] The purpose of the present application is to provide a kind of urban built-up area shield construction environmental risk intelligent assessment digital twin system, to improve the scientific nature of environmental risk assessment, realize the visualization, quantification of risk assessment, and make timely decisions for different risk levels, reduce the safety risk problems caused by damage to existing buildings in the construction process.

[0007] To achieve the above purpose, the present application provides the following scheme:

[0008] A kind of urban built-up area shield construction environmental risk intelligent assessment digital twin system, comprising:

[0009] An environmental information perception module is used to collect environmental information in the influence range of shield tunnel construction by an environmental information perception device;

[0010] A construction information perception module is used to collect construction information of a shield tunnel construction machine during shield tunnel construction by a construction information perception device;

[0011] A construction impact information perception module is used to collect construction impact information of the construction information on environmental deposits during shield tunnel construction by a construction impact perception device;

[0012] A digital twin simulation and deduction module is used to construct a digital twin simulation and deduction model according to the environmental information; And based on the construction information and the construction impact information, the digital twin simulation and deduction model is used to simulate and deduce the deformation information of the environmental deposits before and after construction;

[0013] a risk loss evaluation module configured to determine a risk loss based on the deformation information;

[0014] a risk assessment and countermeasure module configured to perform risk assessment based on the risk loss and determine a countermeasure according to the risk assessment result.

[0015] Optionally, the environment information sensing device comprises a UAV, a total station, a soil sampler, a ground penetrating radar, a GPS surveying and positioning instrument, a three-dimensional laser scanner and an inclinometer.

[0016] Optionally, the construction information sensing device comprises a sensor group for monitoring total construction information; the total construction information comprises total thrust of a shield machine advancing cylinder, advancing average speed, cutter head rotating speed, cutter head torque, incision pressure, penetration, grout inflow, grout outflow, grout inflow specific gravity, grout outflow specific gravity, synchronous gradual pressure, synchronous grouting amount, secondary grouting amount and secondary grouting pressure.

[0017] Optionally, the construction influence information sensing device comprises a total station, a vernier caliper, a strain gauge, a side slope pipe, a UAV and a three-dimensional laser scanner.

[0018] The application further provides a city built-up area shield method construction environment risk intelligent assessment method, comprising:

[0019] collecting environment information in a shield tunnel construction influence range; the environment information comprises geometric information and physical information of strata, roads, pipelines and building structures;

[0020] collecting construction information of a shield machine in a shield tunnel construction process;

[0021] collecting construction influence information of the construction information on environment deposits in a shield tunnel construction process;

[0022] constructing a digital twin simulation deduction model based on the environment information;

[0023] based on the construction information and the construction influence information, simulating and deducing deformation information of the environment deposits before and after construction by using the digital twin simulation deduction model;

[0024] determining a risk loss based on the deformation information;

[0025] performing risk assessment based on the risk loss.

[0026] Optionally, the determination of the risk loss based on the deformation information specifically comprises:

[0027] performing weighted summation on the risk loss corresponding to each type of deformation information to determine a risk loss corresponding to a risk probability P.

[0028] Optionally, the risk assessment is performed based on the risk loss, and specifically includes:

[0029] The risk assessment is performed by applying a formula R=F(P, L) to obtain a risk level, wherein R is the risk level, P is the risk probability, L is the risk loss, and F(·) is a risk assessment function.

[0030] Optionally, after the risk assessment based on the risk loss, the method further includes:

[0031] Different countermeasures are determined from a risk countermeasure database according to different risk levels.

[0032] According to the specific embodiments of the present application, the following technical effects are provided:

[0033] The present application constructs a digital twin simulation deduction model based on the perceived environmental information within the influence range of the tunnel shield construction in the urban built-up area, and simulates and deduces the deformation information of the environmental occurrence before and after the construction according to the perceived construction information and construction influence information through the digital twin simulation deduction model, thereby realizing the risk identification, assessment and risk loss evaluation in the whole construction process, intelligently determining the risk avoidance measures through the risk countermeasure database, avoiding the resource waste and social environmental risk caused by the fuzziness in the traditional construction environmental risk assessment, and further improving the safety and intelligent level of the supporting facilities in the shield construction. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0035] Figure 1 The structural diagram of the urban built-up area shield construction environmental risk intelligent evaluation digital twin system provided by the first embodiment of the present application is shown in the figure.

[0036] Figure 2 The flowchart of the urban built-up area shield construction environmental risk intelligent evaluation method provided by the second embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0038] The purpose of the present application is to provide an urban built-up area shield construction environment risk intelligent assessment digital twin system, so as to improve the scientificity of environment risk assessment, realize the visualization and quantification of risk assessment, and make timely decisions for different risk levels, thereby reducing the safety risk problems caused by damage to existing buildings and structures in the construction process.

[0039] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0040] Embodiment one

[0041] The urban built-up area shield construction environment risk intelligent assessment digital twin system provided by the present application includes two parts of hardware and software. The hardware part includes a system host, an environment information sensing device, a construction information sensing device installed on a shield machine, and a construction impact information sensing device installed on a road surface, underground, a building and a pipeline. The software in the system host includes an environment information sensing module, a construction information sensing module, a construction impact information sensing module, a digital twin simulation deduction module, a risk loss evaluation module and a risk assessment and countermeasure module, and each module is linked through a data interface.

[0042] As shown in Figure 1 , the system includes:

[0043] An environment information sensing module is used to collect environment information in the influence range of shield tunnel construction through an environment information sensing device. The environment information sensing device includes a drone, a total station, a soil sampler, a ground penetrating radar, a GPS measurement positioning instrument, a three-dimensional laser scanner and an inclinometer. The structure investigation and exploration work is carried out by using the environment information sensing device, the properties, distribution and groundwater occurrence state of underground rock-soil are found out, the structure, size and physical and mechanical state of existing buildings, roads and existing pipelines are found out, and the geometric and physical information of strata, roads, pipelines and buildings are sensed.

[0044] A construction information sensing module is used to collect construction information of a shield machine in a shield tunnel construction process through a construction information sensing device. The construction information sensing device includes a series of sensors capable of monitoring total thrust of a shield machine advancing cylinder, advancing average speed, cutter head rotating speed, cutter head torque, incision pressure, penetration, grout inflow, grout outflow, grout inflow specific gravity, grout outflow specific gravity, synchronous gradual pressure, synchronous grouting amount, secondary grouting amount and secondary grouting pressure, and the construction information sensing device is linked with the construction information sensing module in the system host through a data interface.

[0045] The construction influence information sensing module is configured to collect construction influence information of the construction information on the environment and deposits in the shield tunnel construction process by a construction influence sensing device. The construction influence sensing device includes a total station, a vernier caliper, a strain gauge, a side slope pipe, a drone, and a three-dimensional laser scanner. The construction influence sensing device is applied to sense the influence of shield construction on the surrounding environment. The influence includes the amount of house inclination, settlement, and crack width caused by shield construction, the amount of road settlement and crack width, the deformation of underground pipelines, and the like.

[0046] The digital twin simulation deduction module is configured to construct a digital twin simulation deduction model according to the environment information, and simulate and deduce deformation information of the environment and deposits before and after construction based on the construction information and the construction influence information.

[0047] Before the shield tunnel is formally constructed, the construction is in a pre-construction risk assessment stage. Based on the construction scheme in the design file, the corresponding stratum loss under a certain probability P is obtained based on case statistics and is input into the digital twin simulation deduction module to cause stratum settlement in the model and further cause environmental risks. The existing buildings and other environment and deposits may crack, tilt, or even collapse.

[0048] During the shield construction process, the construction is in a construction risk assessment stage. First, the digital twin simulation deduction model is corrected based on the information in the construction influence information sensing module, the environmental influence caused by the previous construction is applied to the model, and the measured displacement and cracks of the buildings and other environment and deposits are given. The corrected model is used as the initial model for analysis in this stage. Based on the information obtained by the construction information sensing module and the construction influence information sensing module in the previous construction, a Bi-LSTM model is used to predict the stratum loss and the corresponding probability P that may be caused by subsequent construction. Finally, the stratum loss under a certain probability P is input into the digital twin simulation deduction module to cause stratum settlement in the model and further cause environmental risks. The existing buildings and other environment and deposits may crack, tilt, or even collapse, thereby generating deformation data information of the environment and deposits. The simulation and deduction of the construction environment influence in the construction cycle are completed.

[0049] The risk loss evaluation module is configured to determine the risk loss based on the deformation information.

[0050] The risk loss evaluation module reads deformation data information in the digital twin simulation deduction module under a certain probability P through a data interface, including cracking, tilting and damage information of stratum, road, pipeline and building structure (environmental occurrence) in pre-construction risk deduction and construction risk deduction. According to the risk loss corresponding to each type of damage information, the risk loss corresponding to a certain risk probability P is determined by weighted summation. The risk loss evaluation includes building cracking repair compensation fee, building tilting repair compensation fee, road cracking repair fee, building collapse loss fee, demolition fee, personnel casualty loss fee, lost work fee, engineering loss fee, social influence loss fee and total environmental loss fee. The environmental loss fee of the module is the input parameter of the risk loss L of the subsequent risk assessment and countermeasure module.

[0051] The risk assessment and countermeasure module is used for risk assessment based on the risk loss, and determines countermeasures according to the risk assessment result.

[0052] The risk loss L and the risk probability P are input into the risk assessment and countermeasure module, the formula R=F(P,L) is applied for risk assessment calculation, the environmental risk grade is obtained, and the risk grade of the environmental occurrence individual is evaluated. In the formula, R is the risk grade, P is the risk probability, L is the risk loss, and F(.) is the risk assessment function.

[0053] According to the construction environmental risk grade of different environmental regions, the system calls the risk response measures and outputs the corresponding economic input of the countermeasure measures for reference of the construction unit. For example, a building with a high risk grade is damaged due to tunnel construction, and the economic compensation is 10 million yuan. The construction unit chooses to spend 5 million yuan for pre-reinforcement to avoid the risk of damage caused by construction.

[0054] The foregoing risk response measures are fed back to the digital twin simulation deduction module, the risk grade after taking the countermeasures is automatically calculated by using the same risk deduction process, and the risk grade and the risk can be accepted after the subsequent construction.

[0055] Compared with the prior art, the application establishes a core risk management system of the digital twin simulation deduction module, can perform risk deduction according to different risk probabilities and actual construction parameters, has the characteristics of high visibility and strong data support, can also quantify the risk grade and risk loss after taking the risk countermeasure, and provides strong support for engineering construction personnel.

[0056] Embodiment two

[0057] As shown in Figure 2 The urban built-up area shield method construction environmental risk intelligent evaluation method provided by the application comprises the following steps:

[0058] Step 101: Collect environmental information in the influence range of shield tunnel construction; the environmental information includes geometric information and physical information of stratum, road, pipeline and building structures.

[0059] The environment in the influence range (3-5 times the tunnel diameter) of shield tunnel construction is perceived by using environmental information perception devices, and unmanned aerial vehicles, binocular cameras, laser scanning, deep ground exploration holes, geological radars, etc. are used to fully perceive and collect geometric information and physical information from bottom to top, including stratum, underground water, underground pipelines, underground building structures, roads and surface building structures. These data are used as initial values for the establishment of subsequent digital twin simulation deduction models.

[0060] Step 102: Collect construction information of the shield machine during the shield tunnel construction process.

[0061] The construction information perception devices installed on the shield machine are used to obtain and record full construction information, including the total thrust of the shield machine's thrust cylinder, the average speed of the thrust, the cutter head speed, the cutter head torque, the incision pressure, the penetration, the grout inflow, the grout outflow, the grout specific gravity, the grout specific gravity, the synchronous gradual pressure, the synchronous grouting amount, the secondary grouting amount, and the secondary grouting pressure.

[0062] Step 103: Collect construction influence information of the construction information on the environmental deposits during the shield tunnel construction process.

[0063] The construction influence perception devices are used to obtain the construction influence of the aforementioned construction information on the environmental deposits, and the construction influence perception devices include crack monitoring devices, inclination monitoring devices, deformation monitoring devices, pipeline flow monitoring devices, etc. for building structures, roads and strata.

[0064] Step 104: Establish a digital twin simulation deduction model based on the environmental information.

[0065] The automatic modeling technology is used to cut, simplify, position and assign material structure attributes to the oblique photography model, map the environmental information to the finite element numerical simulation software and the physical engine, and finally reserve the tunnel position according to the designed construction path. The final effect of the model is a three-dimensional model that is visible and can reflect the geometric dimensions and physical information of the environment.

[0066] This model can be used for pre-computation before construction or for prediction computation during construction. Because the tunnel is a linear long structure, the construction information and construction influence information of the front part of the tunnel can be applied to the prediction of the environmental response of the rear part of the tunnel construction.

[0067] Step 105: Based on the construction information and the construction influence information, the deformation information of the environment hosting object before and after construction is simulated and deduced by using the digital twin simulation and deduction model.

[0068] Whether it is pre-construction deduction or prediction of subsequent construction stages during construction, it will produce deformation data such as cracking, tilting, and collapse of the environment hosting object.

[0069] Before construction, based on the statistical analysis of completed projects, the corresponding stratum loss probability is determined, and the environmental risk caused by stratum loss of different probabilities is calculated. The deformation of the environment hosting object will go through two stages, small deformation stage and large deformation stage, corresponding to high probability and low probability respectively. In the case of high probability, the hosting object is in the small deformation stage, which mainly includes small amplitude tilting, cracking and deformation, and high precision is required. Finite element software is used for calculation; in the case of low probability, with the influence of tunnel construction, the deformation further develops to the large deformation stage, which is mainly used to explore the collapse damage range of the environment and to determine the collision influence between existing buildings. The calculation efficiency is required to be high, and the physical engine software is used for calculation. The probability value in this step is obtained by statistical analysis of engineering cases. The cracking, deformation and collapse data of existing buildings calculated in this step will be used as parameter input for risk loss evaluation to estimate the risk loss caused by tunnel construction.

[0070] During construction, the aforementioned construction information and construction influence information can be imported into the model to calculate the physical and mechanical response of the model based on the environmental impact of previous construction, in order to predict the possible environmental impact caused by the preset shield construction parameters in subsequent construction, and the environmental risk. During the shield construction process, it is in the risk assessment stage of construction. First, based on the construction influence information, the digital twin simulation and deduction model is modified, and the environmental impact caused by previous construction is applied to the model to give the measured displacement, cracks and other properties of the environment hosting object such as buildings, and the modified model is used as the initial model for analysis in this stage. Based on the construction information and construction influence information in the previous construction, the Bi-LSTM model is used to predict the stratum loss and the corresponding probability P that may be caused by subsequent construction. Finally, the stratum loss under a certain probability P is input into the digital twin simulation and deduction model to cause stratum settlement in the model, and then to cause environmental risk. The existing buildings and other environment hosting objects crack, tilt or even collapse, thus producing deformation data information of the environment hosting object. The simulation and deduction of the construction environment impact in the construction cycle are completed.

[0071] Step 106: Determine the risk loss based on the deformation information.

[0072] The deformation information includes cracking, tilting and damage information of strata, roads, pipelines and building structures (environmental deposits) in pre-construction risk deduction and construction risk deduction. The risk loss corresponding to each type of damage information is weighted and summed to determine the risk loss corresponding to a certain risk probability P. The risk loss evaluation includes the total environmental loss cost such as building cracking repair compensation fee, building tilting repair compensation fee, road cracking repair fee, building collapse loss fee, demolition fee, personnel casualty loss fee, lost work fee, engineering loss fee and social influence loss fee.

[0073] Step 107: risk assessment based on the risk loss.

[0074] Taking risk loss and risk occurrence probability as the basis for risk assessment calculation, the construction risk can be regarded as a function of risk probability and risk loss, and its quantitative formula can be expressed as: R = F (P, L). In the formula, R is the risk (Risk) level, P is the risk probability (Risk Probability), L is the risk loss (Risk Loss), and F (.) is the risk assessment function.

[0075] Relying on long-term accumulated engineering experience to build a risk response measure database, corresponding to different risk levels, the risk response measures are retrieved and the measure economic input is output for the reference of the construction unit. The risk response measures taken are fed back to the digital twin simulation deduction model, and the risk level after taking the countermeasures is automatically calculated by using the same process as described above, and the risk level and economic input obtained automatically can be accepted before subsequent construction.

[0076] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] In this paper, specific examples are used to describe the principles and implementation methods of the invention. The above description of the embodiments is only to help understand the method and its core idea of the invention. The described embodiments are only a part of the embodiments of the invention, not all the embodiments. Based on the embodiments in the invention, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the invention.

Claims

1. An urban built-up area shield construction environment risk intelligent assessment digital twin system, comprising: an environment information perception module for collecting environment information in the influence range of shield tunnel construction through environment information perception devices; a construction information perception module for collecting construction information of a shield tunneling machine during shield tunnel construction through construction information perception devices; a construction impact information perception module for collecting construction impact information of the construction information on environment deposits during shield tunnel construction through construction impact perception devices; a digital twin simulation and deduction module for constructing a digital twin simulation and deduction model according to the environment information, and simulating and deducing deformation information of environment deposits before and after construction based on the construction information and the construction impact information; a risk loss evaluation module for determining risk loss based on the deformation information; a risk assessment and countermeasure module for risk assessment based on the risk loss, and determining countermeasures according to the risk assessment results; the deformation information of environment deposits before and after construction based on the construction information and the construction impact information, and the digital twin simulation and deduction model, specifically comprising: before the formal construction of the shield tunnel, obtaining the corresponding stratum loss under a certain probability P based on case statistics, and inputting into the digital twin simulation and deduction module; during shield construction, applying a Bi-LSTM model to predict the stratum loss and the corresponding probability P that may be caused by subsequent construction based on the information obtained by the construction information perception module and the construction impact information perception module in the previous construction; inputting the stratum loss under a certain probability P into the digital twin simulation and deduction module to determine the deformation information of environment deposits; the risk loss includes environmental loss costs; the risk assessment based on the risk loss specifically comprises: applying the formula R=F(P, L) to perform risk assessment to obtain a risk level; wherein R is the risk level, P is the risk probability, L is the risk loss, and F(.) is a risk assessment function.

2. The urban built area shield method construction environment risk intelligent assessment digital twin system according to claim 1, characterized in that, The environment information perception devices include unmanned aerial vehicles, total stations, soil samplers, ground penetrating radars, GPS measurement positioners, three-dimensional laser scanners, and inclinometers.

3. The urban built area shield method construction environment risk intelligent assessment digital twin system according to claim 1, characterized in that, The construction information perception devices include a sensor group for monitoring total construction information; the total construction information includes: total thrust of the shield tunneling machine pushing cylinder, average pushing speed, cutter head rotating speed, cutter head torque, incision pressure, penetration, grout inflow, grout outflow, grout specific gravity, grout specific gravity, synchronous gradual pressure, synchronous grouting amount, secondary grouting amount, and secondary grouting pressure.

4. The urban built area shield method construction environment risk intelligent assessment digital twin system according to claim 1, characterized in that, The construction impact information perception devices include total stations, vernier calipers, strain gauges, side slope pipes, unmanned aerial vehicles, and three-dimensional laser scanners.

5. An urban built-up area shield method construction environment risk intelligent assessment method, the method passes through the urban built-up area shield method construction environment risk intelligent assessment digital twin system of claim 1, characterized in that, comprising: collecting environment information in the influence range of shield tunnel construction; the environment information includes geometric information and physical information of strata, roads, pipelines, and building structures; collecting construction information of a shield tunneling machine during shield tunnel construction; collecting construction impact information of the construction information on environment deposits during shield tunnel construction; constructing a digital twin simulation and deduction model based on the environment information; Based on the construction information and the construction influence information, the digital twin simulation deduction model is used to simulate and deduce deformation information of environment deposits before and after construction. Based on the deformation information, risk loss is determined. Risk assessment is performed based on the risk loss. The risk assessment based on the risk loss specifically includes: A formula R=F(P, L) is applied to perform risk assessment to obtain a risk level; wherein R is the risk level, P is the risk probability, L is the risk loss, and F(.) is a risk assessment function.

6. The urban built-up area shield method construction environment risk intelligent assessment method according to claim 5, characterized in that, The determination of the risk loss based on the deformation information specifically includes: The risk loss corresponding to the risk probability P is determined by weighted summation of the risk loss corresponding to each type of deformation information.

7. The urban built-up area shield method construction environment risk intelligent assessment method according to claim 5, characterized in that, After the risk assessment based on the risk loss, the following steps are further included: Different countermeasures are determined from a risk countermeasure database according to different risk levels.

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