阅读说明：本技术 一种适用于不同公路工程的路面塌陷程度检测方法 (Pavement collapse degree detection method suitable for different highway projects ) 是由 不公告发明人 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种适用于不同公路工程的路面塌陷程度检测方法,包括以下步骤：步骤一：检测公路面层、基层、路基的工程地质成分；步骤二：初步确定普查区域；步骤三：对初测中发现的疑似点进行复测,并进行数据对比分析；步骤四：对确定后的塌陷区进行钻孔验证并修复,对其他异常情况进行检测,确保道路安全运行。本适用于不同公路工程的路面塌陷程度检测方法,分别运用车载探地雷达和手推探地雷达对立面变形沉降区域进行综合检测,以提高结果的准确性,针对不同的公路工程和公路环形,采用不用的勘测重心,从而有针对性的、有效的进行检测决策,效率高,检测精准,大大减少了检测时间,大大提高了道路使用安全性,有效的消除了安全隐患。(The invention discloses a method for detecting the degree of road surface collapse suitable for different highway projects, which comprises the following steps: the method comprises the following steps: detecting engineering geological components of a pavement, a base course and a roadbed of the highway; step two: preliminarily determining a census region; step three: retesting suspected points found in the initial survey, and performing data comparison and analysis; step four: and (4) performing drilling verification and repairing on the determined collapse area, and detecting other abnormal conditions to ensure the safe operation of the road. The method for detecting the degree of the road surface collapse suitable for different road projects is characterized in that the vehicle-mounted ground penetrating radar and the hand-push ground penetrating radar are respectively used for carrying out comprehensive detection on the opposite surface deformation settlement area so as to improve the accuracy of results, and different road projects and road ring shapes are aimed at, the centers of gravity of investigation are not used, so that the targeted and effective detection decision is carried out, the efficiency is high, the detection is accurate, the detection time is greatly shortened, the road use safety is greatly improved, and the potential safety hazard is effectively eliminated.)

1. A pavement collapse degree detection method suitable for different highway projects is characterized by comprising the following steps:

the method comprises the following steps: detecting engineering geological components of a pavement layer, a base layer and a roadbed of the highway, analyzing geological component characteristics and surrounding environment of the highway, and judging basic conditions which may cause pavement collapse;

step two: reading a road image by using a vehicle-mounted ground penetrating radar, carrying out primary survey general survey on a road, preliminarily determining a general survey area, and acquiring a reference position of the vehicle-mounted ground penetrating radar on a preset reference point on the general survey area in real time;

step three: re-testing suspected points found in the initial test by using a hand-push ground penetrating radar, performing data comparison and analysis, performing feature extraction, and forming a record generation table;

step four: and (3) performing drilling verification and repair on the determined subsided area, detecting other abnormal conditions to form a detection result, analyzing the influence degree possibly generated by the existing hidden danger according to the detection result, rejecting a corresponding processing and maintenance scheme, taking effective processing measures to eliminate the potential safety hazard, and ensuring safe operation of the road.

2. The method for detecting the degree of road surface collapse applicable to different road projects as claimed in claim 1, wherein in the step one, the detection contents are soil texture and underground drainage pipe network respectively, the soil texture of the urban road is detected to be collapsible loess, the soil texture is uniform, the structure is loose, gaps are developed, and the compressibility is small when the urban road is not wetted by water.

3. The method for detecting the degree of road surface collapse applicable to different road projects as claimed in claim 1, wherein aiming at the first step, the cause of road collapse is preliminarily judged, the range of pipelines including public drainage facilities such as municipal rainwater pipelines, sewage pipelines, inspection wells and auxiliary facilities thereof is checked according to the road environment, the measurement is subjected to site survey, the detection method is preliminarily formulated, the proposed detection method is subjected to effectiveness test according to the site survey result, the adopted detection method and technology are determined, and instruments of various detection instruments are checked before detection.

4. The method for detecting the degree of road surface collapse applicable to different road projects as claimed in claim 1, wherein in the second step, the vehicle-mounted ground penetrating radar transmits high-frequency electromagnetic pulses through a radar antenna to detect the ground, the detection depth of the vehicle-mounted ground penetrating radar on the urban road surface is less than 5m, the pulses transmitted by the radar are reflected by various interfaces in a road structure layer within 2m underground, return to the ground and are received by a radar receiver, and the distribution conditions of hidden diseases such as cracks, breakage, subsidence deformation, voids and the like in a roadbed are detected, and key detection areas are defined.

5. The method for detecting road surface collapse degree suitable for different road projects as claimed in claim 1, wherein in the second step, the vehicle-mounted ground penetrating radar processes the received signals by the graphic recorder due to the fact that the antenna moves along the surface, and then displays the processed signals, the display result of the graphic recorder is a cross section record or a ground radar image, the resolution ratio of an interface and an independent target body is excellent due to the fact that the soil layer material has short wavelength relatively to the size of the geological radar, the vehicle-mounted ground penetrating radar acquires the target position and the longitude and latitude of the detection point in real time, the geodetic coordinates are determined according to the longitude and latitude, the position marked by the determined geodetic coordinates is used as a key detection area, and the corresponding geodetic coordinates are stored.

6. The method for detecting the degree of road surface collapse applicable to different road projects as claimed in claim 1, wherein after the key detection areas are defined in the third step, a hand-push ground penetrating radar is used for conducting high-density seismic exploration on the detection areas, the detection depth can reach 20-30m, the same offset distance is used for excitation and receiving, the recording point is located at the key point of the excitation and receiving distances, a single detector is used for receiving at the receiving point during each excitation, after the single detector is used for receiving at the receiving point, the excitation point and the receiving point move forward for a certain distance at the same time, and the process is repeated to obtain a seismic image time profile on the measuring line.

7. The method for detecting road surface collapse degree suitable for different highway projects according to claim 1, wherein, aiming at the third step, when the underground interface is horizontal, the propagation time of the reflected wave of each excitation is unchanged, the position of the reflection point is just on the recording point, when the depth of the interface is changed, the propagation time of the reflected wave is also changed, and the position of the reflection point deviates from the recording point and moves towards the upward-inclining direction of the interface, so that the change condition of the reflection wave homophase axis can intuitively reflect the fluctuation condition of the underground interface, the time profile waveform is intuitive, the contrastive analysis is easy, and the longitudinal and transverse distribution conditions of the underground medium can be inferred according to the change conditions of the reflection wave homophase axis, the amplitude, the frequency and the phase in the seismic mapping time profile.

8. The method for detecting the degree of road surface collapse applicable to different highway projects as claimed in claim 1, wherein aiming at the fourth step, constructors check and record road quality attention, repair positions with potential quality hazards, backfill operation is carried out on the collapse positions, when backfilling below a structural layer, the joint of backfilled soil and an original soil layer is set to be in a ladder shape, the thickness of each compacted layer is not more than 20cm, the backfilling treatment below the top surface of a road bed is not less than 80cm, and the backfilling is carried out by ramming with lime soil layer by layer.

9. The method for detecting the degree of road surface collapse applicable to different road projects as claimed in claim 1, wherein for the first step, transient rayleigh waves are adopted for detecting the highway to obtain the speed of the surface waves, the detection depth can reach 20-30m, the softness and hardness degree of the stratum of the highway can be directly reflected, whether a soft interlayer or a soft foundation exists in the stratum or not is judged, a detection method is preliminarily formulated, and combined with the result of site survey, cracks of each structural layer of the highway are more than a plurality, a plurality of cracks are developed upwards to an asphalt surface layer, the number of cracks in the structural layer of the emergency lane is obviously more than that of the traffic lane and the overtaking lane, the proposed detection method is subjected to effectiveness experiments, the adopted detection method and technology are determined, and instruments of various detection instruments are checked before detection.

10. The method for detecting the degree of road surface collapse applicable to different highway projects as claimed in claim 1, wherein aiming at the first step, transient impact load is used as a seismic source to excite Rayleigh waves in a certain frequency range, a low-frequency detector is used for recording the vertical component of surface waves at a position slightly far away from the seismic source, frequency spectrum analysis and processing are carried out on the recorded surface wave signals, a frequency dispersion curve is calculated and drawn, the thickness machine surface wave speed of each stratum is obtained through quantitative interpretation, the hardness and softness of the stratum are directly reflected by the surface wave speed, so that whether soft interlayers or soft foundations exist in the stratum or not is determined, and the distribution situation of the bearing capacity of the foundations in a certain underground range is judged.

Technical Field

The invention relates to the technical field of pavement collapse detection, in particular to a pavement collapse degree detection method suitable for different highway projects.

Background

The ground collapse refers to a geological phenomenon that surface rocks and soil bodies collapse under the influence of natural or artificial factors. The road surface subsidence deformation can lead to the road surface height unevenness, roughness poor, seriously influences the comfort level of driving and pedestrian's walking, and especially on highway, the vehicle speed of traveling is very fast, induces serious traffic accident such as car turnover, car collision easily, also is the prophase sign that the road surface subsides simultaneously. Therefore, the pavement subsidence deformation area must be detected in time, the severity, the range and the forming reason of the pavement subsidence deformation are checked, and a basis is provided for formulating targeted maintenance treatment measures. The pavement subsidence deformation is the external expression of hidden diseases (such as cracks, breakage, uneven settlement, void or holes) existing in the pavement, the base layer and the roadbed of the highway. The problems of inaccurate treatment in the construction process, such as the strictness of roadbed filling control, the improper treatment of wet and soft foundations, the incompact filling of roadbed earth and stone, the inconsistent compaction standards of filling and digging junctions and the like can cause the uneven settlement of the roadbed. In addition, the road surface may collapse due to road surface load, construction disturbance, and the like. The traditional detection method adopts a drilling coring method to detect the road surface, has high randomness and poor representativeness, can cause permanent damage to the road, and cannot adapt to the development requirement of the road surface deformation settlement detection. And the obvious environment difference between the urban highway and the expressway is limited by special environment, and the method adopted by people has the characteristic of no damage and cannot adopt the same method for detection.

Disclosure of Invention

The invention aims to provide a pavement collapse degree detection method suitable for different highway projects, which respectively uses a vehicle-mounted ground penetrating radar and a hand-push ground penetrating radar to comprehensively detect opposite face deformation and settlement areas, can realize depth combination and mutual verification methods, obtains a better detection effect to improve the accuracy of results, and adopts different survey centers of gravity aiming at different highway projects and highway rings, thereby pertinently and effectively carrying out detection decision, having high efficiency and accurate detection, greatly reducing the detection time, ensuring the quality of subsequent repair and solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a pavement collapse degree detection method suitable for different highway projects comprises the following steps:

the method comprises the following steps: detecting engineering geological components of a pavement layer, a base layer and a roadbed of the highway, analyzing geological component characteristics and surrounding environment of the highway, and judging basic conditions which may cause pavement collapse;

step two: reading a road image by using a vehicle-mounted ground penetrating radar, carrying out primary survey general survey on a road, preliminarily determining a general survey area, and acquiring a reference position of the vehicle-mounted ground penetrating radar on a preset reference point on the general survey area in real time;

step three: re-testing suspected points found in the initial test by using a hand-push ground penetrating radar, performing data comparison and analysis, performing feature extraction, and forming a record generation table;

step four: and (3) performing drilling verification and repair on the determined subsided area, detecting other abnormal conditions to form a detection result, analyzing the influence degree possibly generated by the existing hidden danger according to the detection result, rejecting a corresponding processing and maintenance scheme, taking effective processing measures to eliminate the potential safety hazard, and ensuring safe operation of the road.

Further, to step one, the content of detection is soil texture and underground drainage pipe network respectively, the soil texture that detects out urban highway is collapsible loess, soil texture is more even, the structure is loose, the space develops, when not soaking by water, general intensity is higher, the compressibility is less, under the action of overburden layer dead weight stress, or under dead weight stress and additional stress combined action, sink and stabilize the back, soak by water, the soil structure can be destroyed rapidly, and produce and show additional deformation or sink, lead to the whole or local sinking of road bed, the road surface is indulged transverse crack.

Further, aiming at the step one, preliminarily judging the reasons of road collapse, checking the range of pipelines including public drainage facilities such as municipal rainwater pipelines, sewage pipelines, inspection wells and auxiliary facilities thereof according to the road environment, carrying out site survey on the measurement, preliminarily formulating a detection method, carrying out effectiveness test on the formulated detection method by combining the site survey result, determining the adopted detection method and technology, and carrying out instrument verification on various detection instruments before detection.

Further, aiming at the second step, the vehicle-mounted ground penetrating radar transmits high-frequency electromagnetic pulses to detect the ground through the radar antenna, the detection depth of the vehicle-mounted ground penetrating radar on the urban road surface is less than 5m, the pulses transmitted by the radar are reflected when meeting various interfaces in a road structure layer within the range of 2m underground, the pulses return to the ground and are received by the radar receiver, cracks, breakage, subsidence deformation, and the distribution conditions of hidden diseases such as voids and holes in a roadbed are detected, and meanwhile, key point detection areas are defined.

Further, aiming at the second step, the vehicle-mounted ground penetrating radar moves along the surface, so that signals received by the graphic recorder are processed and then displayed, the display result of the graphic recorder is a cross section record or a ground radar image, the resolution ratio of an interface and an independent target body is excellent due to the fact that the geological radar shows short wavelength in relative soil layer substances, the vehicle-mounted ground penetrating radar acquires the target position and the longitude and latitude of a detection point in real time, geodetic coordinates are determined according to the longitude and latitude, the position marked by the determined geodetic coordinates is used as a key detection area, and the corresponding geodetic coordinates are stored.

Further, after the key detection area is defined in the third step, high-density seismic exploration is carried out on the detection area by adopting a hand-push ground penetrating radar, the detection depth can reach 20-30m, the same offset distance is adopted for excitation and receiving, the recording point is positioned at the key point of the excitation and receiving distance, a single detector is adopted for receiving at the receiving point during each excitation, after the recording is carried out, the excitation point and the receiving point move forward for a certain distance at the same time, and the process is repeated to obtain a seismic mapping time section on the survey line.

Furthermore, aiming at the third step, when the underground interface is horizontal, the propagation time of the reflected wave of each excitation is unchanged, the position of the reflection point is just on the recording point, when the depth of the interface changes, the propagation time of the reflected wave also changes, and the position of the reflection point deviates from the recording point and moves towards the upward inclination direction of the interface, so the change condition of the reflection wave homophase axis can visually reflect the fluctuation condition of the underground interface, the waveform of the time section is visual, the comparison and analysis are easy, and the longitudinal and transverse distribution conditions of the underground medium can be inferred according to the change conditions of the reflection wave homophase axis, the amplitude, the frequency and the phase in the seismic mapping time section diagram.

And further, aiming at the fourth step, constructors check and record road quality attention, repair parts with potential quality hazards, backfill the subsidence parts, and when backfilling below a structural layer, the joint of backfill soil and an original soil layer is set to be in a ladder shape, the thickness of each layer after compaction is not more than 20cm, the backfilling treatment below the top surface of the roadbed is not less than 80cm, and the backfill is carried out layer by adopting lime soil.

Further, aiming at the step one, transient Rayleigh waves are adopted for detecting the expressway to obtain the surface wave speed, the detection depth can reach 20-30m, the softness and hardness degree of the stratum of the expressway can be directly reflected, whether a soft interlayer or a soft foundation exists in the stratum or not is judged, a detection method is preliminarily formulated, the detection method is combined with a field survey result, more cracks exist in each structural layer of the expressway, a plurality of cracks are upwards developed to an asphalt surface layer, the number of cracks in the structural layer of the emergency lane is obviously more than that of a driving lane and a passing lane, an effectiveness experiment is carried out on the formulated detection method, the adopted detection method and technology are determined, and instruments are verified on various detection instruments before detection.

Further, aiming at the first step, transient impact load is used as a seismic source, Rayleigh waves in a certain frequency range are excited, a low-frequency detector is used for recording the vertical component of surface waves at a position slightly far away from the seismic source, frequency spectrum analysis and processing are carried out on the recorded surface wave signals, a frequency dispersion curve is calculated and drawn, the thickness machine surface wave speed of each stratum is obtained through quantitative interpretation, the hardness and softness of the stratum are directly reflected by the surface wave speed, whether a weak interlayer or a weak foundation exists in the stratum or not is determined, and the distribution condition of the bearing capacity of the foundation in a certain underground range is judged.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the pavement collapse degree detection method suitable for different highway projects, the vehicle-mounted ground penetrating radar and the hand-push ground penetrating radar are respectively used for comprehensively detecting the opposite surface deformation settlement areas, so that the depth combination and mutual verification method can be realized, a better detection effect is obtained, and the accuracy of the result is improved.

2. The road surface collapse degree detection method suitable for different road projects, provided by the invention, aims at different road projects and road rings, adopts different exploration gravity centers, so that detection decisions are pertinently and effectively carried out, the efficiency is high, the detection is accurate, and the detection time is greatly reduced.

3. The method for detecting the degree of road surface collapse, which is suitable for different highway projects, ensures the quality of subsequent repair, timely knows the degree and severity of road surface collapse, greatly improves the safety of road use, and effectively eliminates potential safety hazards.

Drawings

Fig. 1 is a flow chart of a method for detecting the degree of road surface collapse applicable to different highway projects.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a method for detecting a road surface collapse degree suitable for different road projects includes the following steps:

the method comprises the following steps: detecting engineering geological components of a road surface layer, a base layer and a roadbed, analyzing geological component characteristics and surrounding environment of the road, respectively detecting soil texture and an underground drainage pipe network, detecting that the soil texture of the urban road is collapsible loess, the soil texture is uniform, the structure is loose, gaps develop, when the urban road is not soaked by water, the general strength is high, the compressibility is small, under the action of self-weight stress of an upper covering soil layer or under the combined action of self-weight stress and additional stress, after the urban road sinks and is stabilized, the soil texture is soaked by water, the soil texture can be rapidly destroyed, and obvious additional deformation or sinking is generated, so that the whole or local sinking of the roadbed can be caused, the road surface is longitudinally and transversely cracked, basic conditions which can cause the collapse of the road surface are judged, the cause of the collapse of the road is preliminarily judged, the pipeline range is checked according to the environment of the road, and public drainage facilities including municipal rainwater pipelines, sewage pipelines, inspection wells, accessory facilities and the like are arranged, performing site survey on the measurement, preliminarily formulating a detection method, performing an effectiveness experiment on the formulated detection method by combining the site survey result, determining the adopted detection method and technology, and performing instrument verification on various detection instruments before detection;

step two: the method comprises the steps of reading a road image by a vehicle-mounted ground penetrating radar, carrying out primary survey general survey on the road, processing a signal received by a graphic recorder by the vehicle-mounted ground penetrating radar due to the fact that an antenna moves along the surface, then displaying the signal, displaying a result by the graphic recorder as a cross section record or a ground radar image, having excellent resolution on an interface and an independent target body due to the fact that soil layer substances are short in wavelength relative to the size of the geological radar, acquiring a target position and longitude and latitude of a detection point in real time by the vehicle-mounted ground penetrating radar, determining geodetic coordinates according to the longitude and latitude, taking the position marked by the determined geodetic coordinates as a key detection area, storing the corresponding geodetic coordinates, primarily determining the general survey area, emitting high-frequency electromagnetic pulses to detect the ground by the vehicle-mounted ground penetrating radar through the radar antenna, wherein the detection depth of the vehicle-mounted ground penetrating radar on an urban road surface is less than 5m, the pulse transmitted by the radar meets various interfaces in a road structure layer within 2m underground to generate reflection, returns to the ground and is received by a radar receiver, detects the distribution conditions of hidden diseases such as cracks, broken damages, sinking deformation, voids and the like in a roadbed, and simultaneously defines a key detection area to obtain the reference position of the vehicle-mounted ground penetrating radar to a preset reference point on a general investigation area in real time;

step three: adopting a hand-push ground penetrating radar to retest suspected points found in initial survey, defining a key detection area, adopting the hand-push ground penetrating radar to perform high-density seismic exploration on the detection area, wherein the detection depth can reach 20-30m, adopting the same offset distance to perform excitation and reception, wherein a recording point is positioned at the key point of excitation and reception distances, after each excitation, a single detector is adopted to receive the receiving point at the receiving point, after the excitation point and the receiving point are recorded together, the excitation point and the receiving point move forward for a certain distance simultaneously, repeating the process to obtain a seismic image time profile on a measuring line, performing data comparison analysis, performing feature extraction, forming a record generation table, wherein when the underground interface level is reached, the transmission time of reflected waves of each excitation is unchanged, the position of a reflection point is just on the recording point, and when the interface depth changes, the transmission time of the reflected waves also changes, the position of the reflection point deviates from the recording point and moves towards the upward inclination direction of the interface, so that the change condition of the reflection wave homophase axis can visually reflect the fluctuation condition of the underground interface, the time section waveform is visual, the comparison and analysis are easy, and the longitudinal and transverse distribution conditions of the underground medium can be inferred according to the change conditions of the reflection wave homophase axis, the amplitude, the frequency and the phase in the seismic mapping time section diagram;

step four: the method comprises the steps of carrying out drilling verification and restoration on a determined subsided area, detecting other abnormal conditions to form a detection result, analyzing the influence degree possibly generated by the existing hidden danger according to the detection result, eliminating corresponding processing and maintenance schemes, examining and recording road quality attention by constructors, restoring the position where the hidden danger is found, backfilling the subsided position, setting the joint of backfill soil and an original soil layer into a step shape when backfilling below a structural layer, wherein the thickness of each layer after compaction is not more than 20cm, the backfilling processing below the top surface of a road bed is not less than 80cm, tamping and backfilling layer by adopting lime soil, adopting effective processing measures to eliminate the potential safety hazard, and ensuring safe operation of the road.

Example two

Referring to fig. 1, a method for detecting a road surface collapse degree suitable for different road projects includes the following steps:

the method comprises the following steps: detecting engineering geological components of a surface layer, a base layer and a roadbed of a highway, analyzing geological component characteristics and surrounding environment of the highway, detecting a highway to obtain surface wave speed by adopting transient rayleigh waves, exciting rayleigh waves in a certain frequency range by using transient impact load as a seismic source, recording vertical components of the surface waves by using a low-frequency detector slightly far away from the seismic source, performing frequency spectrum analysis and processing on recorded surface wave signals, calculating and drawing a frequency dispersion curve, obtaining the thickness machine surface wave speed of each stratum through quantitative explanation, directly reflecting the soft and hard degree of the stratum so as to determine whether a soft interlayer or a soft foundation exists in the stratum, judging the distribution condition of the bearing capacity of the foundation in a certain underground range, wherein the detection depth can reach 20-30m, directly reflecting the soft and hard degree of the stratum of the highway, and judging whether the soft interlayer or the soft foundation exists in the stratum, preliminarily drawing up a detection method, combining with a site survey result, wherein cracks of each structural layer of the expressway are more than a plurality of cracks, a plurality of cracks are upwards developed to an asphalt surface layer, the number of cracks in the structural layer of the emergency lane is obviously more than that of the construction lane and the overtaking lane, basic conditions which possibly cause the formation of road surface collapse are judged, the drawn-up detection method is subjected to effectiveness experiments, the adopted detection method and technology are determined, and instruments of various detection instruments are checked before detection;

step two: the method comprises the steps of reading a road image by a vehicle-mounted ground penetrating radar, carrying out primary survey general survey on the road, processing a signal received by a graphic recorder by the vehicle-mounted ground penetrating radar due to the fact that an antenna moves along the surface, then displaying the signal, displaying a result by the graphic recorder as a cross section record or a ground radar image, having excellent resolution on an interface and an independent target body due to the fact that soil layer substances are short in wavelength relative to the size of the geological radar, acquiring a target position and longitude and latitude of a detection point in real time by the vehicle-mounted ground penetrating radar, determining geodetic coordinates according to the longitude and latitude, taking the position marked by the determined geodetic coordinates as a key detection area, storing the corresponding geodetic coordinates, primarily determining the general survey area, emitting high-frequency electromagnetic pulses to detect the ground by the vehicle-mounted ground penetrating radar through the radar antenna, wherein the detection depth of the vehicle-mounted ground penetrating radar on an urban road surface is less than 5m, the pulse transmitted by the radar meets various interfaces in a road structure layer within 2m underground to generate reflection, returns to the ground and is received by a radar receiver, detects the distribution conditions of hidden diseases such as cracks, broken damages, sinking deformation, voids and the like in a roadbed, and simultaneously defines a key detection area to obtain the reference position of the vehicle-mounted ground penetrating radar to a preset reference point on a general investigation area in real time;

step three: adopting a hand-push ground penetrating radar to retest suspected points found in initial survey, defining a key detection area, adopting the hand-push ground penetrating radar to perform high-density seismic exploration on the detection area, wherein the detection depth can reach 20-30m, adopting the same offset distance to perform excitation and reception, wherein a recording point is positioned at the key point of excitation and reception distances, after each excitation, a single detector is adopted to receive the receiving point at the receiving point, after the excitation point and the receiving point are recorded together, the excitation point and the receiving point move forward for a certain distance simultaneously, repeating the process to obtain a seismic image time profile on a measuring line, performing data comparison analysis, performing feature extraction, forming a record generation table, wherein when the underground interface level is reached, the transmission time of reflected waves of each excitation is unchanged, the position of a reflection point is just on the recording point, and when the interface depth changes, the transmission time of the reflected waves also changes, the position of the reflection point deviates from the recording point and moves towards the upward inclination direction of the interface, so that the change condition of the reflection wave homophase axis can visually reflect the fluctuation condition of the underground interface, the time section waveform is visual, the comparison and analysis are easy, and the longitudinal and transverse distribution conditions of the underground medium can be inferred according to the change conditions of the reflection wave homophase axis, the amplitude, the frequency and the phase in the seismic mapping time section diagram;

step four: the method comprises the steps of carrying out drilling verification and restoration on a determined subsided area, detecting other abnormal conditions to form a detection result, analyzing the influence degree possibly generated by the existing hidden danger according to the detection result, eliminating corresponding processing and maintenance schemes, examining and recording road quality attention by constructors, restoring the position where the hidden danger is found, backfilling the subsided position, setting the joint of backfill soil and an original soil layer into a step shape when backfilling below a structural layer, wherein the thickness of each layer after compaction is not more than 20cm, the backfilling processing below the top surface of a road bed is not less than 80cm, tamping and backfilling layer by adopting lime soil, adopting effective processing measures to eliminate the potential safety hazard, and ensuring safe operation of the road.

To sum up, this road surface degree of subsidence detection method suitable for different highway engineering, utilize on-vehicle ground penetrating radar and hand push ground penetrating radar to face respectively and warp the subsidence area and carry out comprehensive testing, can realize the method that depth combines, mutual verification, the better detection effect who gets, in order to improve the accuracy of result, to different highway engineering and highway annular, adopt not survey focus, thereby it is pointed, effectual the detection decision-making, high efficiency, it is accurate to detect, the check-out time has significantly reduced, thereby follow-up prosthetic quality has been guaranteed, in time know road surface degree of subsidence and severity, road safety in utilization has been improved greatly, the effectual potential safety hazard of having eliminated.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.