CN116341295A - Road stability assessment method and system based on underground pipeline - Google Patents
Road stability assessment method and system based on underground pipeline Download PDFInfo
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Abstract
The invention relates to the field of urban road safety evaluation, in particular to a road stability evaluation method and system based on underground pipelines. The method provided by the invention comprises the following steps: acquiring underground pipeline information of a road to be analyzed; building an underground pipeline influence intensity model and an underground pipeline degradation influence intensity model respectively, and respectively obtaining a first influence intensity value and a second influence intensity value by combining the models with underground pipeline information; respectively obtaining the road standard bearing capacity of a road to be analyzed and the underground pipeline standard bearing capacity; obtaining a first influence degree by combining the first influence intensity value with the road standard bearing capacity; obtaining a second influence degree by combining the second influence intensity value with the standard bearing capacity of the underground pipeline; and summarizing the first influence degree and the second influence degree, and evaluating the influence degree of the underground pipeline on the road stability. The method can accurately evaluate the influence degree of the underground pipeline on the road stability, and has important significance for guaranteeing the road safety.
Description
Technical Field
The invention relates to the field of urban road safety evaluation, in particular to a road stability evaluation method and system based on underground pipelines.
Background
Underground pipelines are often buried under roads as an important component of urban infrastructure. The underground pipeline is in a soil environment for a long time and is influenced by the stress and the load of surrounding soil bodies, so that the deformation and the sedimentation of the surrounding soil bodies of the underground pipeline are caused, and even the damage and the rupture of the underground pipeline can be caused. These problems can affect not only the normal operation of the underground pipeline, but also the stability of the surrounding road. In particular, today, when the urban process is accelerated, the number and scale of underground pipelines are increasing, and the service life of many pipelines is approaching or exceeding the expected life, so that the problem of safety of the underground pipelines is attracting more and more attention. In this context, it is particularly important to evaluate the stability of the underground pipeline. Through accurate measurement of deformation and settlement of soil around the underground pipeline and detection and evaluation of fatigue problems, alternating load, corrosion and other factors in the underground pipeline, potential safety hazards of the underground pipeline can be found and prevented in an early stage, so that stability and traffic safety of surrounding roads are guaranteed.
Currently, the road stability assessment based on underground pipelines mainly includes the following aspects: 1. how to accurately measure the deformation and sedimentation conditions of the soil around the underground pipeline, and evaluate the influence of the underground pipeline on the stability of the current road based on the deformation and sedimentation conditions of the soil around the underground pipeline. 2. How to evaluate the influence of the degradation degree of the underground pipeline on the stability of the current road aiming at the underground pipeline with fatigue problems, alternating load, rust and other factors in long-time service. 3. How to comprehensively evaluate the influence of the underground pipeline on the stability of the current road based on the safety conditions of soil surrounding the underground pipeline and the underground pipe.
Disclosure of Invention
In order to solve the problems of the prior art and meet the actual needs, in a first aspect, the invention provides a road stability evaluation method based on an underground pipeline, which aims to accurately evaluate the influence of the underground pipeline on the road stability, including deformation and settlement of surrounding soil and the degradation degree of the underground pipeline. The road stability assessment method based on the underground pipeline comprises the following steps: acquiring underground pipeline information of a road to be analyzed; building an underground pipeline influence intensity model, and combining the underground pipeline information through the underground pipeline influence intensity model to obtain a first influence intensity value of the underground pipeline on road stability; building an underground pipeline degradation influence intensity model, and combining the underground pipeline information through the underground pipeline degradation influence intensity model to obtain a second influence intensity value of the underground pipeline on road stability; respectively obtaining the road standard bearing capacity of a road to be analyzed and the underground pipeline standard bearing capacity; the first influence intensity value is combined with the road standard bearing capacity to obtain a first influence degree of soil layers around the underground pipeline on road stability; the second influence intensity value is combined with the standard bearing capacity of the underground pipeline to obtain a second influence degree of the underground pipeline on the road stability; and summarizing the first influence degree and the second influence degree, and evaluating the influence degree of the underground pipeline on the road stability. The invention provides a method for comprehensively and accurately evaluating the influence of an underground pipeline on the road stability, which provides scientific basis for the management and maintenance of the road stability by respectively quantifying the influence degree of soil layers around the underground pipeline on the road stability and the influence degree of the underground pipeline on the road stability; and by comprehensively considering factors such as soil deformation and sedimentation conditions around the underground pipeline, degradation degree of the underground pipeline and the like, the influence of the underground pipeline on the road stability is accurately estimated. The road stability evaluation method based on the underground pipeline can evaluate the influence degree of the underground pipeline on the road stability more accurately, and has important significance for guaranteeing the road safety and preventing accidents.
Optionally, the obtaining the underground pipeline information of the road to be analyzed includes the following steps: providing GPR equipment, and selecting a probe and a detection frequency according to the road to be analyzed; setting a datum line on the road to be analyzed, and scanning the road to be analyzed along the datum line by utilizing the GPR equipment; acquiring a scanning result of the GPR equipment, wherein the scanning result comprises an underground pipeline image, the resistivity of the underground pipeline and the dielectric constant of the underground pipeline; and obtaining the underground pipeline information according to the underground pipeline image, the relative dielectric constant of the underground pipeline and the resistance of the underground pipeline. The invention adopts GPR technology to detect the underground pipeline information, thus nondestructively acquiring the underground pipeline information, avoiding damaging the existing pipeline and ensuring the safety.
Optionally, the building of the underground pipeline influence intensity model, and the combination of the underground pipeline information with the underground pipeline influence intensity model, to obtain a first influence intensity value of the underground pipeline on the road stability, includes the following steps: by regarding the soil layer around the underground pipeline as a semi-infinite elastic medium, an underground pipeline influence strength model is built, and the underground pipeline influence strength model meets the following formula:
wherein->
Representing the first influence intensity of the soil layer around the underground pipeline on the road stability, < >>
Represents an empirical factor of influence of sedimentation of the soil layer around the underground pipeline, < ->
Representing the difference in sedimentation height of the soil layer around the underground line,/->
Representing the sedimentation width of the soil layer around the underground pipeline, < >>
Calculated aspect ratio parameter representing soil layer surrounding the underground line, < ->
Poisson's ratio representing the soil layer surrounding the underground pipeline; substituting the underground pipeline information into the underground pipeline influence intensity model to obtain a first influence intensity value of the underground pipeline on road stability.
Optionally, the building an underground pipeline degradation influence intensity model, and combining the underground pipeline information through the underground pipeline degradation influence intensity model, to obtain a second influence intensity value of the underground pipeline on road stability, including the following steps: according to longitudinal stress analysis of the underground pipeline, building an underground pipeline degradation influence strength model, wherein the underground pipeline degradation influence strength model meets the following formula:
wherein->
Representing the second influence intensity of the underground pipeline itself on the road stability,/->
Represents an empirical factor of the deterioration of the underground pipeline itself, +.>
Indicating the severity of the surrounding soil layer->
Indicating the distance of the upper surface of the underground line from the surface, < + >>
Indicating the diameter of the underground pipeline>
Represents the friction angle between the underground line and the surrounding soil layer, < >>
The non-drainage shear strength of the surrounding soil layer is represented; substituting the underground pipeline information into the underground pipeline degradation influence intensity model to obtain a second influence intensity value of the underground pipeline on road stability.
Optionally, the first degree of influence satisfies the following formula:
wherein->
Indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
Representing the first influence intensity of the soil layer around the underground pipeline on the road stability, < >>
Indicating road standard bearing capacity.
Optionally, the second degree of influence satisfies the following formula:
wherein->
Representing a second degree of influence of the underground line itself on the road stability,/->
Representing the second influence intensity of the underground pipeline itself on the road stability,/->
Indicating the standard load capacity of the underground utility.
Optionally, the summarizing the first and second degrees of influence evaluates the subsurfaceThe influence degree of the pipeline on the road stability comprises the following steps: and building a road stability influence degree evaluation model by utilizing the first influence degree and the second influence degree, wherein the road stability influence degree evaluation model meets the following formula:
wherein->
Indicating the extent of influence of the underground pipeline on the road stability, +.>
Indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
A second degree of influence of the underground pipeline itself on road stability is represented; substituting the specific values of the first influence degree and the second influence degree into the road stability influence degree evaluation model to obtain the influence degree value of the underground pipeline on the road stability.
Optionally, the step of summarizing the first influence degree and the second influence degree, and evaluating the influence degree of the underground pipeline on the road stability further includes the following steps: and constructing an influence degree correction model, and correcting the road stability influence degree evaluation model by using the influence degree correction model. According to the method, the evaluation result is corrected by constructing the influence degree correction model, so that the reliability of evaluation is further improved.
Optionally, the modified road stability influence degree evaluation model satisfies the following formula:
，
wherein->
Indicating the extent of influence of the underground pipeline on the road stability, +.>
Indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
Representing a second degree of influence of the underground line itself on the road stability,/->
Analysis correction value representing the structure of the underground structure, +.>
Representing the empirical factor of the area calculation error influence, +.>
Representing the area of the ith block pattern surrounded by the modeling theory boundary and the underground structure diagram boundary, ++>
Representing the total area of all the graphics enclosed by the boundaries of the subsurface structure map.
In order to efficiently perform the road stability assessment method based on the underground pipeline provided by the invention, the invention also provides a road stability assessment system based on the underground pipeline. The underground pipeline-based road stability assessment system includes one or more processors; the system comprises one or more input devices, one or more output devices and a memory, wherein the processor, the input devices, the output devices and the memory are connected through a bus, the memory is used for storing a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the road stability assessment method based on the underground pipeline provided by the first aspect of the invention. The road stability evaluation system based on the underground pipeline has compact structure and stable performance, and can efficiently execute the road stability evaluation method based on the underground pipeline, thereby improving the overall applicability and practical application capability of the road stability evaluation system based on the underground pipeline.
Drawings
FIG. 1 is a flowchart of a road stability evaluation method based on underground pipelines according to an embodiment of the present invention;
FIG. 2 is a flowchart of obtaining information of an underground pipeline according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a baseline setting provided by an embodiment of the present invention;
fig. 4 is a block diagram of a road stability evaluation system based on an underground pipeline according to an embodiment of the present invention.
Detailed Description
Specific embodiments of the invention will be described in detail below, it being noted that the embodiments described herein are for illustration only and are not intended to limit the invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the invention. In other instances, well-known circuits, software, or methods have not been described in detail in order not to obscure the invention.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," "one example," or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale.
In an alternative embodiment, please refer to fig. 1, fig. 1 is a flowchart of a road stability evaluation method based on an underground pipeline according to an embodiment of the present invention. As shown in fig. 1, the road stability evaluation method based on the underground pipeline comprises the following steps:
and S01, acquiring underground pipeline information of the road to be analyzed.
Geological radar (GPR) is a non-invasive subsurface detection technique that detects the nature of subsurface structures and materials by transmitting high frequency electromagnetic waves and receiving reflected signals. The method can quickly and accurately acquire underground information under the condition of not damaging the earth surface, and is suitable for detecting underground pipelines, tunnels, rock-soil horizons, hydrogeological conditions and the like. In an alternative embodiment, please refer to fig. 2, fig. 2 is a flowchart of obtaining underground pipeline information according to an embodiment of the present invention. The step S01 shown in fig. 2 of obtaining the underground pipeline information of the road to be analyzed includes the following steps:
and S011, providing GPR equipment, and selecting a probe and a detection frequency according to the road to be analyzed.
S012, setting a datum line on the road to be analyzed, and scanning the road to be analyzed along the datum line by using the GPR equipment. Referring to fig. 3, fig. 3 is a schematic diagram of a baseline setting according to an embodiment of the invention. In fig. 3, a solid line represents a road edge, a broken line parallel to the road edge is a road center line, and a broken line perpendicular to the road center line is a reference line. As shown in fig. 3, the reference line is set equidistantly perpendicular to the center line of the road.
S013, acquiring a scanning result of the GPR device, wherein the scanning result comprises an underground pipeline image, the resistivity of the underground pipeline and the dielectric constant of the underground pipeline.
And S014, obtaining the underground pipeline information according to the underground pipeline image, the relative dielectric constant of the underground pipeline and the resistance of the underground pipeline. The underground pipeline information comprises an underground pipeline material parameter, an underground pipeline structure parameter, underground pipeline position information and an underground pipeline surrounding soil layer parameter.
Further, in step S014, a 3D model of the pipeline can be constructed using the pipeline image, and when constructing the pipeline 3D model, the irregular image boundary in the pipeline image obtained by the GPR apparatus is generally considered as a polygon surrounded by piecewise straight lines. Therefore, the underground pipeline structural parameters, the underground pipeline position information and the actual underground pipeline structural parameters acquired based on the 3D model of the underground pipeline have certain errors. In step S014, the relative dielectric constant and resistivity of the underground pipeline are used to obtain the material parameters of the underground pipeline and the soil layer data around the underground pipeline, which can be performed by referring to the existing data table, wherein, the material parameters of the underground pipeline/the soil layer parameters around the underground pipeline are partially shown in the following table:
and comparing the data obtained by the GPR equipment with the contents of the table to obtain the corresponding underground pipeline material parameters and the soil layer parameters around the underground pipeline.
And S02, building an underground pipeline influence intensity model, and combining the underground pipeline information through the underground pipeline influence intensity model to obtain a first influence intensity value of the underground pipeline on road stability.
As non-soil layer impurities, the soil layer around the underground pipeline can be settled to a certain extent due to the influence of factors such as alternating load and the like in service, so that the structural strength of the pavement is changed. According to the underground pipeline information obtained in the step S01, and by combining with the rock-soil mechanics principle, the soil layer around the underground pipeline is regarded as a semi-infinite elastic medium, and an underground pipeline influence strength model is established. The stability influence of the underground pipeline to the road surface to be analyzed can be obtained through the underground pipeline influence intensity model by taking the stability influence of the underground pipeline to the road surface to be analyzed as non-soil layer impurities into consideration.
In an alternative embodiment, the building the underground pipeline influence intensity model and combining the underground pipeline information through the underground pipeline influence intensity model to obtain a first influence intensity value of the underground pipeline on road stability includes the following steps:
s021, constructing an underground pipeline influence strength model by taking the soil layer around the underground pipeline as a semi-infinite elastic medium.
In this embodiment, the built underground pipeline influence intensity model satisfies the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the first influence intensity of the soil layer around the underground pipeline on the road stability, < >>
The experimental factors of the sedimentation influence of soil layers around the underground pipeline are represented, and the experimental factors are verified by experiments and discussed by experts, and the experimental factors are +.>
The value is 2.9784%>
Representing the difference in sedimentation height of the soil layer around the underground line,/->
Representing the sedimentation width of the soil layer around the underground pipeline, < >>
Calculated aspect ratio parameter representing soil layer surrounding the underground line, < ->
Representing poisson's ratio of the soil layer surrounding the underground pipeline.
S022, substituting the underground pipeline information into the underground pipeline influence intensity model to obtain a first influence intensity value of the underground pipeline on road stability.
In this embodiment, the road to be analyzed is a road surface with longer service time and worse condition, and the corresponding underground pipeline information is obtained after scanning by the GPR device. The information of the underground pipeline is clear: the underground pipeline under the road to be analyzed is a rigid pipeline, the sedimentation height difference of soil layers around the underground pipeline is 0.13 meter, the sedimentation width of the soil layers around the underground pipeline is 0.01 meter, and the soil layers around the underground pipelineThe calculated aspect ratio parameter of the soil layer is 7, and the poisson ratio of the soil layer around the underground pipeline is 0.43. Further, substituting the above-mentioned underground pipeline information into the underground pipeline influence intensity model to obtain a corresponding first influence intensity value:
。
s03, building an underground pipeline degradation influence intensity model, and combining the underground pipeline information through the underground pipeline degradation influence intensity model to obtain a second influence intensity value of the underground pipeline on road stability.
It will be appreciated that the underground pipeline deteriorates over time, and if the pipeline is subjected to a pressure exceeding its deteriorated load-carrying capacity, problems such as cracking, hollowing and water seepage occur, thereby affecting the strength of the road structure on the ground. Further, when the underground pipeline is subjected to soil layer load, the soil body at the position of the underground pipeline is subjected to external force to generate corresponding stress and strain, so that the underground pipeline degradation influence strength model is built based on the bearing capacity of the underground pipeline, and the longitudinal bearing capacity of the underground pipeline is mainly analyzed.
In an optional embodiment, the building an underground pipeline degradation influence intensity model and combining the underground pipeline information through the underground pipeline degradation influence intensity model to obtain a second influence intensity value of the underground pipeline on road stability includes the following steps:
s031, building an underground pipeline degradation influence strength model according to longitudinal stress analysis of the underground pipeline.
In this embodiment, the built underground pipeline degradation influence intensity model satisfies the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the second influence intensity of the underground pipeline itself on the road stability,/->
Represents the empirical factor of the deterioration of the underground pipeline, and is verified by experiments and discussed by experts to be +.>
The value is 0.1735%>
Indicating the severity of the surrounding soil layer->
Indicating the distance of the upper surface of the underground line from the surface, < + >>
Indicating the diameter of the underground pipeline>
Represents the friction angle between the underground line and the surrounding soil layer, < >>
Indicating the non-drainage shear strength of the surrounding soil layer.
S032, substituting the underground pipeline information into the underground pipeline degradation influence intensity model to obtain a second influence intensity value of the underground pipeline on road stability.
In this embodiment, the road to be analyzed is a road surface with longer service time and worse condition, and the corresponding underground pipeline information is obtained after scanning by the GPR device. The underground pipeline information is clear: the soil layer around the underground pipeline is 18.53 kilonewtons per cubic meter, the distance between the upper surface of the underground pipeline and the ground surface is 33.1 meters, the diameter of the underground pipeline is 0.45 meter, the friction angle between the underground pipeline and the surrounding soil layer is 85 degrees, the non-drainage shear strength of the surrounding soil layer is 24.13 kilopascals, and further, the information of the underground pipeline is substituted into the underground pipeline degradation influence strength model to obtain a corresponding second influence strength value:
。
s04, respectively obtaining the standard bearing capacity of the road to be analyzed and the standard bearing capacity of the underground pipeline.
It should be appreciated that the impact of an underground pipeline on road stability can be divided into two aspects: first, the presence of the pipeline itself can have an impact on road stability, such as sedimentation, etc., which refers to the "first impact strength value" of the pipeline; second, the degree of deterioration of the pipeline itself will also have an effect on road stability, which is referred to as the "second impact strength value" of the pipeline. The first criterion for influencing the intensity value should therefore be a criterion for the load-bearing capacity of the road to be analyzed, i.e. it will have an influence on the road stability when the presence of the underground line makes the road subjected to a force exceeding the road load-bearing capacity criterion. The second criterion for influencing the strength value should be the standard bearing capacity of the underground pipeline, i.e. the load capacity that the pipeline itself can withstand. Further, specific values of the road standard bearing capacity and the underground pipeline standard bearing capacity can be adaptively adjusted according to the region where the road to be analyzed is located.
In an alternative embodiment, road standard bearing capacity is determined by consulting the relevant specifications of the "CJJ 37-2012 (2016 edition) City road engineering Specification" and the like
Set to 4.5MP; by consulting relevant specifications of DB13 (J)/T8340-2020 underground pipe network nodular cast iron drainage pipeline design standard, the standard bearing capacity of the underground pipe network is +.>
Set to 3.6MP.
And S05, obtaining a first influence degree of soil layers around the underground pipeline on road stability by utilizing the first influence intensity value and combining the road standard bearing capacity.
Step S05 achieves the purpose of evaluating the influence of the underground pipeline on the stability of the current road based on the deformation and settlement conditions of the soil around the underground pipeline, namely step S054 utilizes the first influence intensity value to combine with the road standard bearing capacity to calculate the first influence degree of the soil around the underground pipeline on the stability of the road. The first influence degree can help engineers determine the influence degree of soil layers around the underground pipeline on the road, and further corresponding measures are taken to ensure the stability and safety of the road. For example, if the calculation result indicates that the soil layer around the underground line has a relatively large degree of influence on the stability of the road, engineers may consider taking some measures such as reinforcing the road structure or constructing the road with stronger materials to ensure the stability and safety of the road.
In an alternative embodiment, the step S05 uses the first influence intensity value in combination with the road standard bearing capacity to obtain a first influence degree of the soil layer around the underground pipeline on the road stability, where the first influence degree satisfies the following formula:
wherein->
Indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
Representing the first influence intensity of the soil layer around the underground pipeline on the road stability, < >>
Indicating road standard bearing capacity.
Further, based on the underground pipeline influence intensity model constructed in the embodiment of step S02, the first influence degree in this embodiment further satisfies the following formula:
wherein->
Represents an empirical factor of influence of sedimentation of the soil layer around the underground pipeline, < ->
Representing the surrounding earth of an underground pipelineSedimentation height difference of layer, +.>
Representing the sedimentation width of the soil layer around the underground pipeline, < >>
Calculated aspect ratio parameter representing soil layer surrounding the underground line, < ->
Representing poisson's ratio of the soil layer surrounding the underground pipeline.
S06, utilizing the second influence intensity value to combine the standard bearing capacity of the underground pipeline to obtain the second influence degree of the underground pipeline on the road stability.
Step S06 achieves the objective of evaluating the degree of influence thereof on the road stability based on the degree of deterioration of the underground pipeline itself. Step S054 combines the second influence intensity value with the standard bearing capacity of the underground pipeline, and obtains the second influence degree of the underground pipeline on the road stability through calculation, so that engineers can be helped to know the influence degree of the condition of the underground pipeline, and accordingly proper maintenance and maintenance plans are formulated, safe and reliable operation of the underground pipeline is ensured, and meanwhile, the stability and safety of the road are ensured. For example, if the calculation result shows that the influence degree of the underground pipeline is large, engineers can take some measures, such as strengthening maintenance and servicing work, and timely replace the aged pipeline so as to prolong the service life of the aged pipeline and ensure the safety of the road and the underground pipeline.
In an alternative embodiment, the step S05 uses the first influence intensity value in combination with the road standard bearing capacity to obtain a first influence degree of the soil layer around the underground pipeline on the road stability, where the first influence degree satisfies the following formula:
wherein->
Representing the second influence of the underground pipeline on the road stabilityDegree (f)>
Representing the second influence intensity of the underground pipeline itself on the road stability,/->
Indicating the standard load capacity of the underground utility.
Further, based on the underground pipeline influence intensity model constructed in the embodiment of step S02, the first influence degree in this embodiment further satisfies the following formula:
wherein, the method comprises the steps of, wherein,
represents an empirical factor of the deterioration of the underground pipeline itself, +.>
Indicating the severity of the surrounding soil layer->
Indicating the distance of the upper surface of the underground line from the surface, < + >>
Indicating the diameter of the underground pipeline>
Represents the friction angle between the underground line and the surrounding soil layer, < >>
Indicating the non-drainage shear strength of the surrounding soil layer.
S07, summarizing the first influence degree and the second influence degree, and evaluating the influence degree of the underground pipeline on the road stability.
Step S07 achieves comprehensive evaluation of the influence on the stability of the current road based on the soil around the underground pipeline and the safety condition of the underground pipe itself by summarizing the first influence degree and the second influence degree. The influence of the underground pipeline on the road stability can be more comprehensively known through comprehensive evaluation, and more accurate basis is provided for engineers to take corresponding measures.
In an alternative embodiment, the step S07 sums the first influence level and the second influence level, and evaluates the influence level of the underground pipeline on the road stability, including the steps of:
s071, constructing a road stability influence degree evaluation model by using the first influence degree and the second influence degree, wherein the road stability influence degree evaluation model satisfies the following formula:
wherein, the method comprises the steps of, wherein,
indicating the extent of influence of the underground pipeline on the road stability, +.>
Indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
Representing a second degree of influence of the underground pipeline itself on the stability of the road.
S072, substituting the specific values of the first influence degree and the second influence degree into the road stability influence degree evaluation model to obtain the influence degree value of the underground pipeline on the road stability.
Further, based on the formulas of the first influence degree and the second influence degree obtained in the above embodiment, respectively, the road stability influence degree evaluation model proposed in the present embodiment also satisfies the following formulas:
wherein->
Indicating road standard bearing capacity->
Represents an empirical factor of influence of sedimentation of the soil layer around the underground pipeline, < ->
Representing the difference in sedimentation height of the soil layer around the underground line,/->
Representing the sedimentation width of the soil layer around the underground pipeline, < >>
Calculated aspect ratio parameter representing soil layer surrounding the underground line, < ->
Poisson's ratio, which indicates the soil layer around the underground line,/->
Represents an empirical factor of the deterioration of the underground pipeline itself, +.>
Indicating standard bearing capacity of underground pipeline>
Indicating the severity of the surrounding soil layer->
Indicating the distance of the upper surface of the underground utility from the surface,
indicating the diameter of the underground pipeline>
Represents the friction angle between the underground line and the surrounding soil layer, < >>
Indicating the non-drainage shear strength of the surrounding soil layer.
It should be understood that, if the information such as the pipeline structural parameter and the pipeline position information in the pipeline information in step S01 is obtained by performing 3D model construction using the pipeline image obtained by the GPR, the modeling is performed by considering the irregular image boundary in the pipeline image as a polygon surrounded by the piecewise straight line when constructing the pipeline 3D model. Therefore, the underground pipeline structural parameters, the underground pipeline position information and the actual underground pipeline structural parameters acquired based on the 3D model of the underground pipeline have certain errors.
In an alternative embodiment, to eliminate the error, the step S07 sums the first influence level and the second influence level to evaluate the influence level of the underground pipeline on the road stability, and further includes the steps of: setting up an influence degree correction model, wherein the influence degree correction model meets the following formula:
wherein->
Analysis correction value representing the structure of the underground structure, +.>
Representing the empirical factor of the area calculation error influence, +.>
Representing the area of the ith block pattern surrounded by the modeling theory boundary and the underground structure diagram boundary, ++>
Representing the total area of all the graphics enclosed by the boundaries of the underground structure diagram; and correcting the road stability influence degree assessment model by using the influence degree correction model, wherein the corrected road stability influence degree assessment model meets the following formula: />
Wherein->
Indicating the extent of influence of the underground pipeline on the road stability, +.>
Indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
Representing a second degree of influence of the underground pipeline itself on the stability of the road.
Further, based on the road stability influence degree evaluation model obtained in the above embodiment, the corrected road stability influence degree evaluation model further satisfies the following formula:
wherein->
Indicating road standard bearing capacity->
Represents an empirical factor of influence of sedimentation of the soil layer around the underground pipeline, < ->
Representing the difference in sedimentation height of the soil layer around the underground line,/->
Representing the sedimentation width of the soil layer around the underground pipeline, < >>
Calculated aspect ratio parameter representing soil layer surrounding the underground line, < ->
Poisson's ratio, which indicates the soil layer around the underground line,/->
Represents an empirical factor of the deterioration of the underground pipeline itself, +.>
Indicating standard bearing capacity of underground pipeline>
Indicating the severity of the surrounding soil layer->
Indicating the distance of the upper surface of the underground line from the surface, < + >>
Indicating the diameter of the underground pipeline>
Represents the friction angle between the underground line and the surrounding soil layer, < >>
Indicating the non-drainage shear strength of the surrounding soil layer. According to the method, the evaluation result is corrected by constructing the influence degree correction model, so that the reliability of evaluation is further improved.
The invention provides a method for comprehensively and accurately evaluating the influence of an underground pipeline on the road stability, which provides scientific basis for the management and maintenance of the road stability by respectively quantifying the influence degree of soil layers around the underground pipeline on the road stability and the influence degree of the underground pipeline on the road stability; and by comprehensively considering factors such as soil deformation and sedimentation conditions around the underground pipeline, degradation degree of the underground pipeline and the like, the influence of the underground pipeline on the road stability is accurately estimated. It will be appreciated that in urban construction, the laying of underground pipelines is very common, such as running water pipes, natural gas pipes, electric power lines, etc., and the presence of these pipelines may have a certain effect on the road stability. Therefore, considering the factors of underground pipelines has important significance for guaranteeing the stability and safety of the road when designing and constructing the road.
In an alternative embodiment, in order to effectively perform the road stability assessment method based on the underground pipeline provided by the invention, the invention further provides a road stability assessment system based on the underground pipeline. In an alternative embodiment, please refer to fig. 4, fig. 4 is a diagram illustrating a road stability evaluation system based on an underground pipeline according to an embodiment of the present invention. As shown in fig. 4, the underground pipeline-based road stability assessment system includes one or more processors; the road stability evaluation system comprises one or more input devices, one or more output devices and a memory, wherein the processor, the input devices, the output devices and the memory are connected through a bus, the memory is used for storing a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions and execute the road stability evaluation method based on the underground pipeline. The road stability evaluation system based on the underground pipeline, provided by the invention, has the advantages of compact structure and stable performance, and can be used for efficiently and accurately implementing the road stability evaluation method based on the underground pipeline.
In yet another alternative embodiment, the processor 401 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The input device 402 may be used to input underground pipeline information of a road to be analyzed. The output device 403 may display the road stability evaluation result based on the underground pipeline obtained by the present invention. The memory 404 may include read only memory and random access memory and provide instructions and data to the processor 401. A portion of memory 404 may also include non-volatile random access memory. For example, memory 404 may also store information of device type.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (10)
1. The road stability assessment method based on the underground pipeline is characterized by comprising the following steps of:
acquiring underground pipeline information of a road to be analyzed;
building an underground pipeline influence intensity model, and combining the underground pipeline information through the underground pipeline influence intensity model to obtain a first influence intensity value of the underground pipeline on road stability;
building an underground pipeline degradation influence intensity model, and combining the underground pipeline information through the underground pipeline degradation influence intensity model to obtain a second influence intensity value of the underground pipeline on road stability;
respectively obtaining the road standard bearing capacity of a road to be analyzed and the underground pipeline standard bearing capacity;
the first influence intensity value is combined with the road standard bearing capacity to obtain a first influence degree of soil layers around the underground pipeline on road stability;
the second influence intensity value is combined with the standard bearing capacity of the underground pipeline to obtain a second influence degree of the underground pipeline on the road stability;
and summarizing the first influence degree and the second influence degree, and evaluating the influence degree of the underground pipeline on the road stability.
2. The method for evaluating the stability of a road based on an underground pipeline according to claim 1, wherein the step of acquiring the underground pipeline information of the road to be analyzed comprises the steps of:
providing GPR equipment, and selecting a probe and a detection frequency according to the road to be analyzed;
setting a datum line on the road to be analyzed, and scanning the road to be analyzed along the datum line by utilizing the GPR equipment;
acquiring a scanning result of the GPR equipment, wherein the scanning result comprises an underground pipeline image, the resistivity of the underground pipeline and the dielectric constant of the underground pipeline;
and obtaining the underground pipeline information according to the underground pipeline image, the relative dielectric constant of the underground pipeline and the resistance of the underground pipeline.
3. The method for evaluating the road stability based on the underground pipeline according to claim 1, wherein the building of the underground pipeline influence intensity model and the combination of the underground pipeline information by the underground pipeline influence intensity model obtain a first influence intensity value of the underground pipeline on the road stability comprises the following steps:
by regarding the soil layer around the underground pipeline as a semi-infinite elastic medium, an underground pipeline influence strength model is built, and the underground pipeline influence strength model meets the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the first influence intensity of the soil layer around the underground pipeline on the road stability, < >>
Represents an empirical factor of influence of sedimentation of the soil layer around the underground pipeline, < ->
Representing the difference in sedimentation height of the soil layer around the underground line,/->
Representing the sedimentation width of the soil layer around the underground pipeline, < >>
Calculated aspect ratio parameter representing soil layer surrounding the underground line, < ->
Poisson's ratio representing the soil layer surrounding the underground pipeline;
substituting the underground pipeline information into the underground pipeline influence intensity model to obtain a first influence intensity value of the underground pipeline on road stability.
4. The method for evaluating the road stability based on the underground pipeline according to claim 1, wherein the constructing the underground pipeline degradation influence intensity model and combining the underground pipeline information through the underground pipeline degradation influence intensity model to obtain a second influence intensity value of the underground pipeline on the road stability comprises the following steps:
according to longitudinal stress analysis of the underground pipeline, building an underground pipeline degradation influence strength model, wherein the underground pipeline degradation influence strength model meets the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the second influence intensity of the underground pipeline itself on the road stability,/->
Represents an empirical factor of the deterioration of the underground pipeline itself, +.>
Indicating the severity of the surrounding soil layer->
Representing the distance between the upper surface of the underground pipeline and the ground surface，/>
Indicating the diameter of the underground pipeline>
Represents the friction angle between the underground line and the surrounding soil layer, < >>
The non-drainage shear strength of the surrounding soil layer is represented;
substituting the underground pipeline information into the underground pipeline degradation influence intensity model to obtain a second influence intensity value of the underground pipeline on road stability.
5. The underground pipeline-based road stability assessment method of claim 3, wherein the first degree of influence satisfies the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
Representing the first influence intensity of the soil layer around the underground pipeline on the road stability, < >>
Indicating road standard bearing capacity.
6. The method of claim 4, wherein the second degree of influence satisfies the following equation:
wherein, the liquid crystal display device comprises a liquid crystal display device,
representing a second degree of influence of the underground line itself on the road stability,/->
Representing the second influence intensity of the underground pipeline itself on the road stability,/->
Indicating the standard load capacity of the underground utility.
7. The method for evaluating the road stability based on the underground pipeline according to claim 2, wherein the step of summarizing the first influence level and the second influence level, and evaluating the influence level of the underground pipeline on the road stability comprises the steps of:
and building a road stability influence degree evaluation model by utilizing the first influence degree and the second influence degree, wherein the road stability influence degree evaluation model meets the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
indicating the extent of influence of the underground pipeline on the road stability, +.>
Indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
A second degree of influence of the underground pipeline itself on road stability is represented;
substituting the specific values of the first influence degree and the second influence degree into the road stability influence degree evaluation model to obtain the influence degree value of the underground pipeline on the road stability.
8. The method of claim 7, wherein the step of summarizing the first and second degrees of influence and evaluating the degree of influence of the underground pipeline on the road stability further comprises the steps of:
and constructing an influence degree correction model, and correcting the road stability influence degree evaluation model by using the influence degree correction model.
9. The underground pipeline-based road stability evaluation method according to claim 8, wherein the modified road stability influence degree evaluation model satisfies the following formula:
wherein, the liquid crystal display device comprises a liquid crystal display device,
indicating the extent of influence of the underground pipeline on the road stability, +.>
Indicating the first degree of influence of the soil layer surrounding the underground line on the road stability,/->
Representing a second degree of influence of the underground line itself on the road stability,/->
Dividing into underground structure diagramCorrection value analysis->
Representing the empirical factor of the area calculation error influence, +.>
Representing the area of the ith block pattern surrounded by the modeling theory boundary and the underground structure diagram boundary, ++>
Representing the total area of all the graphics enclosed by the boundaries of the subsurface structure map.
10. An underground pipeline-based road stability assessment system, comprising one or more processors; one or more input devices, one or more output devices and a memory, the processor, the input devices, the output devices and the memory being connected by a bus, the memory for storing a computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the underground pipeline-based road stability assessment method of any of claims 1-9.
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