A highway soil condition monitoring and analysis method for highway engineering

Abstract

The present invention relates to the field of ground material technology, and specifically to a highway soil condition monitoring and analysis method for highway engineering. The method comprises: collecting highway soil condition data of each section of the area through which the highway engineering construction passes; obtaining the sampling frequency adjustment coefficient of each sampling point in each section by analyzing the highway soil condition data of each section; adjusting the preset sampling frequency of the current sampling point according to the sampling frequency adjustment coefficient of the sampling point; and sampling and monitoring each sampling point according to the adjusted sampling frequency of each sampling point. The present invention can reduce the monitoring cost by dynamically adjusting the sampling frequency and reducing the number of unnecessary sampling times; and can formulate a more reasonable maintenance plan according to the actual situation of the highway soil condition, thereby extending the service life of the highway.

Description

Technical Field

[0001] The invention relates to the technical field of ground materials, and in particular to a highway soil condition monitoring and analysis method for highway engineering. Background Art

[0002] Highway engineering refers to the survey, measurement, design, construction, maintenance, and management of highway structures. Highway engineering structures include roadbeds, pavements, bridges, culverts, tunnels, drainage systems, safety protection facilities, greening and traffic monitoring facilities, as well as houses, workshops, and other service facilities used for construction, maintenance, and monitoring. In the process of highway construction, it is necessary to monitor and analyze the soil conditions of the highway before the highway is laid. Highway soil condition monitoring refers to the detection and evaluation of soil conditions in highway engineering to ensure road quality and safety. This work usually includes monitoring and analysis of physical and mechanical properties of soil such as water content, density, and bearing capacity to ensure the engineering quality and stability of highway construction. Summary of the invention

[0003] In order to solve the technical problem that the existing highway soil condition detection technology for highway engineering only considers the monitoring frequency and sampling method for geotechnical detection items, and does not have a more accurate detection method for soil condition monitoring for highway engineering, which makes the civil engineering detection project not accurate enough when facing highway engineering, the purpose of the present invention is to provide a highway soil condition monitoring and analysis method for highway engineering, and the technical scheme adopted is as follows:

[0004] The present invention provides a highway soil condition monitoring and analysis method for highway engineering, the method comprising: collecting highway soil condition data of each road section in the area through which the highway engineering construction passes; obtaining a sampling frequency adjustment coefficient of each sampling point in each road section by analyzing the highway soil condition data of each road section; adjusting a preset sampling frequency of a current sampling point according to the sampling frequency adjustment coefficient of the sampling point; and sampling and monitoring each sampling point according to the adjusted sampling frequency of each sampling point.

[0005] Compared with the prior art that uses a fixed sampling frequency, the present invention uses different sampling frequencies to sample different sampling points in different sections according to the actual situation of highway soil condition data. The monitoring and analysis of highway soil conditions in highway projects in a floating sampling frequency manner is more reasonable, in line with actual conditions, and has a better monitoring effect.

[0006] Furthermore, according to the severity of soil density change on section i, the soil density of the oth point on section i, and the soil density of the previous point of the oth point on section i, the sampling frequency adjustment coefficient at the position of the oth point on section i is obtained; each sampling point on section i is traversed to obtain the sampling frequency adjustment coefficient of each sampling point on section i; each section in the area through which the highway project passes is traversed to obtain the sampling frequency adjustment coefficient of each sampling point in each section in the area through which the highway project passes; wherein section i is any section of the various sections in the area through which the highway project passes; and the oth point is any sampling point on section i.

[0007] Furthermore, according to the difference in road elevations on both sides of the road section i, the maximum density range of the soil density on the road section i, and the difference in soil density between points with different stake numbers on the road section i, the severity of the change in soil density on the road section i is obtained.

[0008] Furthermore, based on the differences between the description of the elevation changes on both sides of the road of section i and the description of the elevation changes on both sides of the roads of all other sections, as well as the degree of elevation change of section i, the elevation difference of the roads on both sides of the section i is obtained.

[0009] Further, the elevation variation degree of the road section i is obtained according to the difference between the elevation variance of the road section i and the elevation variance of all other road sections. The elevation variance of the road section i is obtained according to the road elevation data of each stake point in the road section i.

[0010] Further, the description of the elevation change on both sides of the road section i is determined according to the elevation difference on both sides of each stake point on the road section i. The elevation difference on both sides of the stake point refers to the elevation difference on both sides of the tangent direction of the road extension direction at the stake point.

[0011] Furthermore, the highway soil condition data includes road elevation data and soil density data. The road elevation data of the paved section of the highway is obtained by a total station; and the soil density data is obtained by sampling and measuring the area where the highway is constructed by drilling sampling method.

[0012] The present invention has the following beneficial effects:

[0013] The present invention adopts different sampling frequencies to sample different sampling points in different sections of the road in a targeted manner, and monitors and analyzes the highway soil conditions of the highway project in a floating sampling frequency manner, which is more reasonable, conforms to the actual working conditions, and has a better monitoring effect.

[0014] Compared with the traditional geotechnical quantitative soil condition sampling and collection method, the present invention can reduce unnecessary sampling times by dynamically adjusting the sampling frequency while ensuring the accuracy of the monitoring data, and can reduce the monitoring costs, including the costs of manpower, material resources and financial resources, thereby improving the monitoring efficiency; it can also timely discover changes in highway soil conditions, such as settlement, deformation, etc., so as to take timely measures to avoid further deterioration of the problem. By dynamically adjusting the sampling frequency, a more reasonable maintenance plan can be formulated according to the actual situation of highway soil conditions, thereby extending the service life of the highway. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A flow chart of a highway soil condition monitoring and analysis method for highway engineering provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation method, structure, features and effects of a highway soil condition monitoring and analysis method for highway engineering proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0018] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0019] The specific scheme of a highway soil condition monitoring and analysis method for highway engineering provided by the present invention is described in detail below in conjunction with the accompanying drawings.

[0020] See also Figure 1 , which shows a flow chart of a highway soil condition monitoring and analysis method for highway engineering provided by an embodiment of the present invention, the method comprising:

[0021] First, collect the highway soil condition data of each section of the highway construction area. The highway soil condition data in the embodiment of the present invention includes road elevation data and soil density data. Among them, the road elevation data of the paved section of the highway is obtained by a total station; and the soil density data is obtained by sampling and measuring the area where the highway construction is located by drilling sampling method.

[0022] Then, by analyzing the highway soil condition data of each road section, the sampling frequency adjustment coefficient of each sampling point in each road section is obtained. The road elevation data and soil density data of each sampling point in the road section are analyzed respectively to obtain the sampling frequency adjustment coefficient of each sampling point in the road section.

[0023] Highway engineering has several sections, and each section has several pile points and sampling points. Section i is any section in the area where the highway engineering construction passes; point o is any sampling point on section i. Taking section i in the area where the highway engineering construction is located as an example, the following description is made.

[0024] The elevation variance of the current road section i is calculated based on the road elevation data of each stake point in the road section i; and the elevation change degree of the current road section i is obtained based on the difference between the elevation variance of the current road section i and the elevation variances of all other road sections.

[0025] The elevation difference on both sides of the tangent direction of the road extension direction at the current stake point is used as the elevation difference on both sides of the current stake point; all stake points on section i are traversed to obtain the elevation difference on both sides of each stake point on section i. Then, based on the elevation difference on both sides of each stake point on section i, the description of the elevation change on both sides of the road on section i is determined.

[0026] According to the differences between the description of the elevation change on both sides of the road of section i and the description of the elevation change on both sides of the road of all other sections, and the degree of elevation change of the current section i, the elevation difference of the road on both sides of section i is obtained. According to the elevation difference of the road on both sides of section i, the maximum density range of the soil density on section i, and the difference in soil density between different stake points on section i, the degree of drastic change of soil density on section i is obtained.

[0027] Next, according to the intensity of soil density change on section i, the soil density of point o on section i, and the soil density of the previous point of point o on section i, the sampling frequency adjustment coefficient at the location of point o on section i is obtained. Each sampling point on section i is traversed to obtain the sampling frequency adjustment coefficient of each sampling point on section i; each section in the area where the highway project passes is traversed to obtain the sampling frequency adjustment coefficient of each sampling point in each section in the area where the highway project passes.

[0028] Secondly, the preset sampling frequency of the current sampling point of section i is adjusted according to the sampling frequency adjustment coefficient of the sampling point of section i obtained by the above method, so as to realize the floating change of the sampling frequency of the sampling point according to the actual working conditions of the construction section. The preset sampling frequency here is the conventional fixed sampling frequency in the prior art.

[0029] Finally, each section of the highway project is traversed, each sampling point in the section is traversed, and then sampling and monitoring of each sampling point is carried out according to the adjusted sampling frequency of each sampling point.

[0030] Compared with the prior art that uses a fixed sampling frequency, the embodiment of the present invention uses different sampling frequencies to sample different sampling points in different sections according to the actual situation of highway soil condition data. The monitoring and analysis of highway soil conditions in highway projects using a floating sampling frequency is more reasonable, in line with actual conditions, and has a better monitoring effect.

[0031] The existing highway soil condition detection technology for highway projects only considers the monitoring frequency and sampling method for geotechnical detection projects, and does not have a more accurate detection method for soil condition monitoring for highway projects. This makes the civil detection project less accurate when facing highway projects. For example, based on the characteristics of highway projects, the highway construction is narrow and long, passing through many areas, and the geographical environment, elevation changes, climate conditions, and soil texture vary greatly. Because the geographical environment of different sections of highway projects varies greatly, the use of geotechnical detection methods with a fixed sampling detection frequency will make the highway soil condition sampling accuracy lower. If the sampling points are densely distributed, the various sampling costs will be higher. Therefore, it is necessary to adjust the soil sampling frequency in a timely manner.

[0032] The core concept of another embodiment of the present invention is to realize how to adjust the sampling frequency of highway soil condition monitoring, and the specific process is as follows:

[0033] step :Collect highway soil condition data for highway projects.

[0034] The embodiment of the present invention mainly uses the elevation data and soil density data of highway construction to monitor the highway soil condition of the highway project, and studies the analysis method based on the road section i. The accurate road elevation data of the paved section of the highway is obtained by the total station, and the soil density data is obtained by sampling and measuring the area where the highway is located through the drilling sampling method.

[0035] step : Analyze the soil conditions of the road sections through which the highway construction project passes.

[0036] The more dramatic the changes in the environmental conditions of a certain section of road (such as terrain changes, soil erosion, etc.), the more unstable the environmental conditions in the area where the section of road is located are considered. When soil sampling is carried out for highway construction, due to large environmental changes, when there are too few sampling points, the representativeness of the sampling points is difficult to guarantee. Therefore, when the environmental changes in the area where a certain section of road is located are large, the sampling frequency required should be higher.

[0037] Calculate the elevation change of section i. When the elevation difference of a section of highway is large, such as a winding mountain highway, the soil types at different elevations of the section may be different due to geological movement, resulting in large differences in various test indicators between the soils. Therefore, the more drastic the elevation change of section i, the greater the difference in soil type change of the section.

[0038] Then calculate the elevation change degree of the road section i, we have:

[0039]

[0040] Where: Indicates the degree of elevation change of road section i. represents the elevation variance of road segment i, It represents the elevation variance of section z. Z represents the total number of Z sections. Section i is any section in the highway project. The elevation variance of section i is calculated based on the elevation data of each stake point in section i.

[0041] ( ) represents the difference in variance between section i and section z, reflecting the fluctuation of section i. Indicates proportional normalization.

[0042] The greater the variance of elevation change of section i and the variance of elevation change of other sections, the greater the elevation change of section i, that is, The bigger.

[0043] Calculate the elevation difference on both sides of road section i. When the elevation of the highway is the same, for different sections at the same elevation, the road conditions on the hillside and the flat sections are different. The greater the difference in terrain changes, the greater the difference in soil types due to the influence of the natural environment, such as water erosion, soil erosion, etc. Therefore, the greater the elevation difference on both sides of the road, the greater the impact on the road's soil conditions. Then there is

[0044]

[0045] in:

[0046]

[0047] Represents the description of the elevation changes on both sides of the road section i. It represents the elevation difference on both sides (2 meters away from the side of the road) of the tangent direction of the highway extension direction at the cth pile number point on section i, that is, the elevation difference on both sides of the road at this point.

[0048] Indicates that there are C pile number points on the road. Among them, The larger it is, the greater the elevation difference in the environment of this section of road.

[0049] It indicates the elevation difference between the two sides of the road section i and the other road sections, that is, the steepness of the two sides of the road section i. It represents the description of the elevation changes on both sides of the road of section z; Indicates the degree of elevation change of road section i; Indicates the difference in road elevation on both sides of road section i; It means there are Z sections of road.

[0050] by As the weight, the greater the elevation change of road section i, the more likely it is a slope road section, that is, the greater the elevation difference between the two sides of the road. The larger it is, the greater the elevation change on both sides of section i is than that on both sides of other sections, which means that the soil condition of section i is more complex, and the change of its soil data is more drastic. Therefore, it is more necessary to increase the sampling density of sampling points in this section.

[0051] As the elevation difference between the two sides of the slope section increases, the section is more likely to experience landslides. If a landslide has occurred at a section in the past, it means that a landslide has occurred at the section, resulting in poor road stability. The soil condition detection sampling at this location should be more intensive, so:

[0052] 1. Determine the historical landslide situation of the road section.

[0053] When a landslide occurs on a certain road section, the original soil layer will be destroyed, sheared and squeezed, forming soil stratification. In the section where the landslide occurs, because the original mechanical stability balance is destroyed, landslides often occur multiple times due to weather conditions such as rain. The landslides in different periods will form different soil stratification structures. The soil layers in different geological layers are subject to different geological pressures, so the types and densities of the soils must be different. The landslide will change the original soil type. The more stratification there is in the section, the more landslides have occurred there in history. Because the soil stratification types caused by landslides are different, the density of the soil is different. In other words, the greater the change in soil density on a certain road section, the more soil stratification there is on that road section.

[0054] Calculate the severity of the soil density change on this section of road:

[0055]

[0056] Where: Indicates the severity of soil density change on road i; Indicates the difference in road elevation on both sides of road section i; It represents the density range with the largest soil density on road i, that is, the difference between the maximum and minimum values ​​of soil density on road i; It represents the soil density difference of section i, which is obtained by subtracting the density differences of different soils in section i and taking the absolute value, reflecting the difference in changes in foundation conditions of section i.

[0057] It indicates the confidence level of the soil density change of the road section i. The greater the elevation difference between the two sides of the road section i, the greater the density difference of the road section, which indicates that the road section may have severe geological movement (such as landslide, etc.). The greater the confidence level, the greater the possibility of drastic change in soil density.

[0058] It indicates the difference in soil density at different stake points on the road section. The greater the difference in soil density, the worse the soil foundation, such as the greater the possibility of a landslide or poor geology.

[0059] represents the soil density at the vth stake point on road i, represents the soil density at the cth stake point on road i, It means that there are C pile number points on road i.

[0060] When the elevation difference between the two sides of road i is greater, the soil density difference on road i is greater, which indicates that the possibility of natural disasters such as landslides on road i is greater, and the possibility of soil density changes is greater. As the weight, the greater the difference in soil density between different stake points on road i, the more drastic the change in soil density is, which means that there are more soil stratifications in this section of road.

[0061] Because landslides are often the overall translation and sliding of part of the mountain, for slope roads, there must be a point (area) on the road where the soil type (soil density) on both sides of the normal line of the road extension direction at the location of the road point is the symmetry axis. And the soil density is approximately symmetrically distributed. When the soil density test shows this pattern, it means that there is a high possibility that a landslide has occurred in the history of the location of the road section.

[0062] Calculate the possibility of historical landslides at the location of the road section: traverse from the starting point of the location of the road section, with the length of the road section as the horizontal axis and the soil density as the vertical axis. Because landslides lead to the emergence of soil structures of different geological layers, and due to the superposition of strata, the soil density at the innermost side of the landslide mountain is the largest, and with the extension of the soil landslide, the landslide body gradually transitions to the outside, and the soil density gradually decreases. After reaching a certain position and becoming the external surface soil, due to the overall translation and sliding of the landslide, its soil density begins to increase in the opposite direction. Based on the change in soil density and the symmetrical characteristics of the overall translation and sliding of the landslide soil layer structure, it is believed that the location of this section of the road meets the characteristics of a landslide. Therefore, in view of the possibility of a landslide at the location of the road section, the soil density of the sampling monitoring section is sampled at the original sampling points, and the road section is traversed to set ,in represents the soil density at point o on the current road section i, represents the average soil density on section i, when When , it is considered that the oth point of the current road section is in a regular position, and the road section has no special geological disasters. Continue to traverse. , it is considered that the location of the oth point in the current road section may be a location with abnormal soil structure. Therefore, the soil collection frequency is adjusted according to the location characteristics of the road section.

[0063] The specific adjustment factors are:

[0064]

[0065] Where: represents the sampling frequency adjustment coefficient at the oth point on the road segment i. Indicates the severity of soil density change on section i, represents the soil density at point o on road section i, It represents the soil density of the previous point o-1 before the oth point on the road section i. The more drastic the density change of the road section, that is, The larger the value is, the greater the soil structure change is, and the greater the possibility of disaster damage in the past. The sampling frequency should be greater, that is, The larger it is, the greater the adjustment factor of the sampling frequency.

[0066] Continue to traverse. Because the landslide causes geological stratification, the geological density will slowly decrease after a rapid increase. According to the change of soil density, the sampling density at different points is adjusted according to the density change. When you reach a certain place, When the soil is reduced, the soil may return to the original soil density position, which may be the middle position of the landslide. According to the characteristics of its location, the sampling density is reduced, that is, the sampling frequency coefficient is adjusted according to the changes in the terrain.

[0067] Traversing forward, when the soil density of the next point increases, , and exists , It indicates the inth point before the current i-th point. It is considered that the position satisfies the symmetry of soil density and it is highly likely that the position is a historical landslide location.

[0068] 2. Calculate the monitoring sampling frequency of highway soil conditions in highway projects.

[0069] Because the density structure of the soil presents the symmetry characteristics of landslides, and because of the particularity of landslides, the landslide cracks produced by the initial landslide will accelerate the occurrence of disasters (the occurrence of subsequent landslides) under natural conditions. Therefore, when the landslide position of section i is determined based on actual monitoring, the sampling frequency of the subsequent landslide section is based on the adjacent The maximum sampling frequency coefficient of the area should be adjusted, and the sampling frequency should be adjusted by selecting the highest sampling frequency coefficient , so as to make the soil condition monitoring of the landslide area more accurate. The maximum sampling frequency is limited to When When , it is considered that the current point of the road section is no longer within the influence range of the landslide position, so sampling is performed according to the original sampling frequency.

[0070] Finally, the monitoring sampling frequency for highway soil conditions in highway projects is:

[0071]

[0072] Where: represents the adjusted actual sampling frequency of the oth point on the road section i; It represents the sampling frequency adjustment coefficient at the oth point on the road section i, reflecting the soil instability at the location; Indicates the preset sampling frequency.

[0073] When the soil stability of the oth point on the road section i is worse, such as the mountainous area where the oth point on the road section i is located and prone to landslides, then The larger the oth point on the road, the greater the increase in the sampling frequency of highway soil condition monitoring. On the contrary, when the soil stability of the oth point on the road section i is better, such as the plain area where the oth point on the road section i is located, The larger the oth point is, the smaller the increase in the sampling frequency for monitoring highway soil conditions will be.

[0074] Compared with the traditional geotechnical quantitative soil condition sampling and collection method, the embodiment of the present invention can reduce unnecessary sampling times and reduce monitoring costs, including costs in terms of manpower, material resources and financial resources, by dynamically adjusting the sampling frequency while ensuring the accuracy of monitoring data. This improves monitoring efficiency. It is also possible to promptly detect changes in highway soil conditions, such as settlement and deformation, so that timely measures can be taken to avoid further deterioration of the problem. By dynamically adjusting the sampling frequency, a more reasonable maintenance plan can be formulated based on the actual highway soil conditions, thereby extending the service life of the highway.

[0075] It should be noted that the sequence of the above embodiments of the present invention is for description only and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

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

Claims

1. A highway soil condition monitoring and analysis method for highway engineering, characterized in that: The method comprises: Collect highway soil condition data for each section of the highway construction area; By analyzing the highway soil condition data of each road section, the sampling frequency adjustment coefficient of each sampling point in each road section is obtained; Adjusting the preset sampling frequency of the current sampling point according to the sampling frequency adjustment coefficient of the sampling point; Sampling and monitoring are performed at each sampling point according to the adjusted sampling frequency of each sampling point; The highway soil condition data includes road elevation data and soil density data; According to the degree of change of soil density on the road section i, the soil density of the oth point on the road section i, and the soil density of the point before the oth point on the road section i, the sampling frequency adjustment coefficient at the location of the oth point on the road section i is obtained; Traverse each sampling point of the road section i to obtain the sampling frequency adjustment coefficient of each sampling point on the road section i; traverse each road section in the area through which the highway project passes, and obtain the sampling frequency adjustment coefficient of each sampling point in each road section in the area through which the highway project passes; Among them, section i is any section of the road in the area where the highway project passes; point o is any sampling point on section i; According to the difference in road elevations on both sides of the road section i, the maximum density range of the soil density on the road section i, and the difference in soil density between points with different stake numbers on the road section i, the degree of drastic change in soil density on the road section i is obtained; According to the differences between the description of the elevation change on both sides of the road of the road section i and the description of the elevation change on both sides of the road of all other road sections, and the elevation change degree of the road section i, the road elevation difference on both sides of the road section i is obtained; According to the difference between the elevation variance of the road section i and the elevation variances of all other road sections, the elevation variation degree of the road section i is obtained.

2. A highway soil condition monitoring and analysis method for highway engineering according to claim 1, characterized in that: According to the road elevation data of each stake point in the road section i, the elevation variance of the road section i is obtained.

3. The highway soil condition monitoring and analysis method for highway engineering according to claim 1 is characterized in that: According to the elevation difference between the two sides of each stake point on the road section i, a description of the elevation change on both sides of the road section i is determined.

4. A highway soil condition monitoring and analysis method for highway engineering according to claim 3, characterized in that: The elevation difference on both sides of the pile point refers to the elevation difference on both sides of the tangent direction of the highway extension direction at the pile point.

5. The highway soil condition monitoring and analysis method for highway engineering according to claim 1 is characterized in that: The road elevation data of the paved section of the highway is obtained through the total station; the soil density data is obtained by sampling and measuring the area where the highway is built through the drilling sampling method.

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