CN116299683B - Pavement disease exploration method in urban shallow tunnel construction - Google Patents
Pavement disease exploration method in urban shallow tunnel construction Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 41
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- 201000010099 disease Diseases 0.000 title claims description 81
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Abstract
The application relates to a pavement damage exploration method in urban shallow tunnel construction, which comprises the steps of obtaining a preliminary damage type and a damage position in a deep area from the ground to a first target layer depth, obtaining a preliminary damage type and a damage position in a tunneling direction setting area of a tunnel front face, and obtaining a preliminary damage type and a damage position in a shallow area from the ground to a second target layer depth, wherein the deep area, the shallow area and the setting area are overlapped with exploration crossing areas to a certain extent, so that three-party data can be guided mutually, comprehensive exploration is carried out in the shallow tunnel and in two groups of depth ranges of the ground surface, the influence of the damage to each other is comprehensively considered by utilizing the three-party data, thus obtaining the final damage type and the damage position, effectively improving exploration accuracy by crossing by different methods, and effectively reducing various losses possibly caused by risks such as pavement void and sedimentation.
Description
Technical Field
The application relates to the field of engineering investigation and civil engineering, in particular to a pavement disease exploration method in urban shallow tunnel construction.
Background
With the popularization of urban rail transit construction, the monitoring and protection work of the existing road in the shallow tunnel construction process is more and more important. Due to the construction specificity of the shallow tunnel, the damage (namely, tiny gaps appear between the road cushion layer and the soil base due to the repeated action of the wheel load) in the daily driving process of the existing road can be amplified due to the large vibration generated in the process and the redistribution of the stratum stress, and the prior karst development units around the tunnel are directly and rapidly influenced along with the permeation of surface water/underground water and the circulation action of the vehicle load, so that secondary risks such as road collapse, subsidence of a ground structure building and the like are caused.
At present, the method for exploring and disposing urban road diseases is mostly in the post-construction stage, and the exploration depth range is mostly from the top of the existing road soil foundation to the road surface depth. According to the recent years, in urban rail transit construction (especially tunnel construction involving karst development areas), there are many correlations among road void, soil holes and karst passages, and such rapidly developing road defects are found in the construction process, so that the detection and disposal of such defects in urban shallow tunnel construction are of considerable importance and necessity.
Disclosure of Invention
The embodiment of the application provides a pavement disease exploration method in urban shallow tunnel construction, which effectively improves exploration accuracy by crossing different methods and effectively reduces various losses possibly caused by risks such as pavement void, settlement and the like.
The embodiment of the application provides a pavement disease exploration method in urban shallow tunnel construction, which comprises the following steps:
determining a exploration crossing area in the range from the design depth of the tunnel body to the ground;
acquiring a transverse wave velocity profile of the ground to a deep region of the first target layer depth, and acquiring a preliminary disease type and disease position in the deep region based on the transverse wave velocity profile, wherein the deep region at least partially coincides with the exploration crossing region;
Acquiring front stratum section information in a tunneling direction setting area of a tunnel face, and acquiring preliminary disease types and disease positions in the setting area based on the front stratum section information, wherein the setting area is at least partially overlapped with a exploration crossing area;
The method comprises the steps of obtaining vertical stratum profile information in a shallow area from the ground to a second target layer depth, and obtaining preliminary disease types and disease positions in the shallow area based on the vertical stratum profile information, wherein the shallow area at least partially coincides with a exploration crossing area, and the second target layer depth is smaller than the first target layer depth;
And determining the final pavement defect type and defect position in shallow tunnel construction based on the preliminary defect type and defect position in the deep region, the set region and the shallow region.
In some embodiments, acquiring a transverse velocity profile of the earth in a deep region to a first target depth of layer comprises the steps of:
Arranging a micro-motion exploration survey line at a ground projection position in the tunneling direction of a tunnel face;
an observation system is arranged, and micro-motion information in a deep region from the ground to the depth of the first target layer is collected;
and extracting a phase velocity dispersion curve based on the inching information, and executing transverse velocity inversion on the dispersion curve to obtain a transverse velocity profile.
In some embodiments, the arrangement mode of the observation system is linear or L-shaped;
The observation system parameters were set to a point spacing of 2m and a track spacing of 2m.
In some embodiments, based on the transverse velocity profile, obtaining the preliminary disease type and disease position in the deep region includes the following steps:
geological interpretation is carried out on the transverse wave velocity profile, and the area with the transverse wave velocity outside the set transverse wave velocity range is marked as an abnormal area;
based on the apparent transverse wave speed of the abnormal areas, the disease type and the disease position of each abnormal area are preliminarily determined.
In some embodiments, acquiring the front stratum profile information in the set area of the tunneling direction of the tunnel face includes the following steps:
arranging a linear geological radar survey line at the position of a tunnel face in a tunnel;
And selecting a geological radar antenna, and acquiring the front stratum section information in a tunneling direction setting area of the tunnel face by adopting a point measurement method and exciting and receiving electromagnetic wave signals.
In some embodiments, acquiring the front stratum profile information in the set area of the tunneling direction of the tunnel face includes the following steps:
arranging a seismic source excitation device and a signal receiving device in the tunnel;
and exciting a seismic source by using a seismic source excitation device, and receiving a reflected signal by using a signal receiving device to obtain the front stratum profile information in the tunneling direction setting area of the tunnel face.
In some embodiments, based on the front stratum profile information, the preliminary disease type and disease position in the set area are obtained, including the following steps:
And performing geological interpretation on the front stratum profile information, and determining the disease type and disease position of each abnormal region.
In some embodiments, obtaining vertical formation profile information in a shallow region from the surface to a second target depth of layer includes the steps of:
Arranging geological radar measuring lines at the ground projection position and two sides of the tunneling direction of the tunnel face;
and selecting a geological radar antenna, and acquiring vertical stratum profile information in a shallow area from the ground to the depth of the second target layer by adopting a distance measurement method and exciting and receiving electromagnetic wave signals.
In some embodiments, based on the vertical formation profile information, obtaining the preliminary disease type and disease location in the shallow area includes the following steps:
And performing geological interpretation on the vertical stratum profile information, and determining the disease type and disease position of each abnormal region.
In some embodiments, the first destination layer has a depth of 30m and the second destination layer has a depth of 3m.
The technical scheme provided by the application has the beneficial effects that:
Because of the multiple solutions of a single exploration method, the exploration result adopting the single exploration method can have interference and is not beneficial to shallow tunnel construction. The application can explore from three angles, comprising obtaining the preliminary disease type and disease position in the deep area from the ground to the first target layer depth, obtaining the preliminary disease type and disease position in the tunneling direction setting area of the tunnel front face, and obtaining the preliminary disease type and disease position in the shallow area from the ground to the second target layer depth, wherein the deep area, the shallow area and the setting area are overlapped with the exploration crossing area to a certain extent, so as to ensure that three-party data can guide each other, comprehensively explore from the shallow tunnel and the two groups of depth ranges of the ground surface, comprehensively consider the influence of the diseases by utilizing the three-party data, thereby obtaining the final disease type and disease position, effectively improving exploration accuracy by crossing by different methods, and effectively reducing various losses possibly caused by risks such as road void, sedimentation and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a location of a probe intersection area according to an embodiment of the present application;
FIG. 2 is a schematic diagram of deep area survey data results provided by an embodiment of the present application;
FIG. 3 is a schematic diagram of the results of exploration data of a set area (geological radar method) provided by an embodiment of the application;
FIG. 4 is a schematic diagram of results of survey data of a set area (HSP/TSP method) provided by an embodiment of the present application;
FIG. 5 is a schematic diagram of shallow area survey data results provided by an embodiment of the present application;
FIG. 6 is a diagram of a result of the layout data of the observation system according to the embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1,2, 3, 4 and 5, an embodiment of the present application provides a method for detecting road surface defects in urban shallow tunnel construction, the method comprising the following steps:
101: a probe intersection area is defined in the range from the design depth of the tunnel body to the ground.
The design depth of the tunnel body is determined according to actual construction conditions and belongs to known quantity.
102: And acquiring a transverse wave velocity profile of the ground in a deep region from the ground to the first target layer depth, and acquiring a preliminary disease type and disease position in the deep region based on the transverse wave velocity profile, wherein the deep region at least partially coincides with the exploration crossing region.
Step 102 belongs to micro-exploration of a road surface, and obtains a cross-section view velocity, wherein the cross-section view velocity refers to a substitute parameter extracted from a target horizon when the cross-section view velocity cannot be directly measured at a horizontal horizon, and the cross-section view interpreted after inversion results of the drilling and the cross-section view velocity can assist in reflecting stratum structure information.
The first depth of destination is determined according to the actual exploration needs, for example, the first depth of destination may be 30m below the ground.
It should be noted that, when the key repetition is performed in the construction stage, the projection position of the surface of the face under construction should be at least a certain distance, such as 50m, from the near end of the earth observation system for micro-motion exploration, or the construction of the face should be suspended, so as to ensure the data quality and the accuracy of the results of the micro-motion exploration.
103: And acquiring front stratum section information in a set area of the tunneling direction of the tunnel face, and acquiring the preliminary defect type and defect position in the set area based on the front stratum section information, wherein the set area is at least partially overlapped with the exploration intersection area.
The method belongs to advanced geological prediction in a tunnel, the method is continuously implemented in the tunneling process, the effective distance of single prediction is determined according to practical conditions, such as 30m, the lap length in the two implementation processes is determined according to practical conditions, such as 5m, the effective distance of single prediction is properly shortened when the turning radius of the tunnel is reduced, and the lap length is increased.
The range of the setting area can be determined according to actual exploration requirements, for example, taking a face as a starting point, and the area in the forward 30m range is the setting area.
104: And acquiring vertical stratum profile information in a shallow area from the ground to the second target layer depth, and acquiring a preliminary disease type and disease position in the shallow area based on the vertical stratum profile information, wherein the shallow area is at least partially overlapped with the exploration crossing area, and the second target layer depth is smaller than the first target layer depth.
The method belongs to ground shallow geological forecast, adopts a geological radar method, is supposed to be continuously carried out in the tunnel face construction process, and an effective area of a single measuring line is supposed to cover a position in front of a mileage where the face is located by a certain distance, such as 100m, and a position behind the face by a certain distance, such as 50m, and executes next road geological radar method exploration after the face mileage is pushed by a certain distance, such as 50 m.
The second depth of destination is determined according to the actual exploration needs, for example, the second depth of destination may be 3m below the ground.
105: And determining the final pavement defect type and defect position in shallow tunnel construction based on the preliminary defect type and defect position in the deep region, the set region and the shallow region.
As an example, for example: when the electromagnetic wave is displayed to be in disordered reflection or strong reflection by the shallow detection result of the geological radar below the mileage pavement in a certain section and is preliminarily judged to be seriously loosened-void diseases, if the deep micro exploration and advanced geological forecast results of the corresponding mileage are not obviously abnormal, the shallow roadbed disease development points are judged to be independent, and corresponding earth surface engineering reinforcement measures (ground grouting, backfilling and the like) are executed; if the data interpretation abnormality (such as karst, broken zone, etc.) is identified by the deep micro-exploration and advanced geological forecast results of the corresponding mileage, when it is inferred that the shallow and deep diseases may have cause connection, the deep engineering reinforcement measures (reinforcement support, vault grouting, etc.) in the tunnel should be supplemented on the basis of executing the corresponding surface engineering reinforcement measures.
The principle of the application is as follows: because of the multiple solutions of a single exploration method, the exploration result adopting the single exploration method can have interference and is not beneficial to shallow tunnel construction. The application can explore from three angles, comprising obtaining the preliminary disease type and disease position in the deep area from the ground to the first target layer depth, obtaining the preliminary disease type and disease position in the tunneling direction setting area of the tunnel front face, and obtaining the preliminary disease type and disease position in the shallow area from the ground to the second target layer depth, wherein the deep area, the shallow area and the setting area are overlapped with the exploration crossing area to a certain extent, so as to ensure that three-party data can guide each other, comprehensively explore from the shallow tunnel and the two groups of depth ranges of the ground surface, comprehensively consider the influence of the diseases by utilizing the three-party data, thereby obtaining the final disease type and disease position, effectively improving exploration accuracy by crossing by different methods, and effectively reducing various losses possibly caused by risks such as road void, sedimentation and the like.
It should be noted that, when performing the exploration of the deep area, the shallow area, and the set area, the steps 102, 103, and 104 are not strictly sequential, that is, the deep area, the shallow area, and the set area may be simultaneously or not simultaneously performed.
It should be noted that, a deep region exploration may be performed before the construction stage begins, and the deep region exploration is used for grasping risks such as preexisting underground diseases in the influence range of the designed line in the census stage, and delineating high risk regions such as large rock surface fluctuation, strong karst development, and development of fault fracture zones, and then performing important retest in the construction process if necessary.
In the step 102, a transverse velocity profile of the ground in the deep region from the ground to the first target depth is obtained, which includes the following steps:
201: and arranging a micro-motion exploration survey line at the ground projection position of the tunneling direction of the tunnel face.
202: And arranging an observation system and collecting inching information in a deep region from the ground to the depth of the first target layer.
When the observation system is arranged, the observation system can be arranged according to the actual situation of a field, as shown in fig. 6, a circle o in the figure represents a point position, a number on the circle o is a point number, a plurality of point positions form a micro-motion detection line, the observation system is arranged on each point position, the observation system comprises a plurality of detectors, a linear or L-shaped arrangement mode as shown in a dotted line frame in fig. 6 can be generally selected, the parameters of the observation system can be set according to the actual exploration requirement, for example, the parameters are set to be 2m for the point distance, 2m for the track distance, the point distance is the distance between two adjacent point positions, and the track distance is the distance between two adjacent detectors.
203: And extracting a phase velocity dispersion curve based on the inching information, and executing transverse velocity inversion on the dispersion curve to obtain a transverse velocity profile.
In the step 102, the preliminary disease type and disease position in the deep area are obtained based on the transverse velocity profile, which includes the following steps:
301: and performing geological interpretation on the transverse wave velocity profile, searching a region with lower transverse wave velocity, and marking a region with transverse wave velocity smaller than the set transverse wave velocity as an abnormal region.
The value of the transverse wave speed can be set according to actual exploration needs.
302: Based on the apparent transverse wave speed of the abnormal areas, the disease type and the disease position of each abnormal area are preliminarily determined.
According to different degrees of apparent transverse wave speed differences of abnormal areas, the types of diseases such as loose fill soil, karst cave and erosion cracks are primarily presumed.
For the micro-exploration method in steps 301-302, a preset surrounding rock transverse wave speed corresponding value is set in the implementation process according to the prior geological drilling or empirical data analysis, when the exploration acquired transverse wave speed is out of the set transverse wave speed range, the situation is considered to be abnormal, and the set transverse wave speed range can be calibrated (drilling) or preset (data analysis); based on the above, the inferred result is given according to the different imaging abnormal region morphology. Such as: the abnormal shapes of the strip shape and the prolate lens shape are presumed to be erosion cracks, fault fracture strips, karst passages and the like; the irregular abnormal area of the near circle is inferred as a soil hole, karst cave, surrounding rock breaking area, etc. Further, on the basis of the micro-motion exploration result, other geophysical prospecting means (such as in-hole advanced forecasting) are adopted for rechecking, and accuracy is improved.
In step 103, the information of the section of the stratum in front of the tunnel face in the set area of the tunneling direction is obtained by various methods.
For example, a geological radar method can be adopted, and because the geological radar method has the advantages of rapidness, convenience, economy, high efficiency and the like in the process of working in a tunnel, the geological radar method is generally adopted to execute advanced geological forecast in the tunnel, and specifically, the method comprises the following steps:
401: arranging a linear geological radar survey line at the position of a tunnel face in a tunnel;
402: and selecting a geological radar antenna, and acquiring the front stratum section information in a tunneling direction setting area of the tunnel face by adopting a point measurement method and exciting and receiving electromagnetic wave signals.
The frequency of the selected geological radar antenna is determined according to actual exploration requirements, for example, the frequency of the geological radar antenna is 100MHz.
If the actual situation is special, if the geological radar method cannot be implemented, an HSP/TSP method may be adopted, specifically, the HSP/TSP method is adopted to obtain the front stratum profile information in the tunneling direction setting area of the tunnel face, which includes the following steps:
501: and selecting proper working surface positions in the tunnel, and arranging a seismic source excitation device and a signal receiving device.
502: And exciting a seismic source by using a seismic source excitation device, and receiving a reflected signal by using a signal receiving device to obtain the front stratum profile information in the tunneling direction setting area of the tunnel face.
In the step 103, the preliminary disease type and disease position in the set area are obtained based on the front stratum profile information, and the method comprises the following steps:
And performing geological interpretation on the front stratum profile information, and determining the disease type and disease position of each abnormal region. Wherein, at this time, the disease type comprises fissure and karst development.
For geological radar, the abnormal characteristics on the interpretation result image include electromagnetic wave signal reflection disorder, in-phase axis dislocation, frequency abnormality, reflection enhancement and the like, and can be identified according to experience of professionals or obvious changes on the image.
For example, referring to fig. 5, in the figure, reflection enhancement and abnormal reflection occur in a dashed frame a, reflection disorder and in-phase axis dislocation occur in a dashed frame B, and in-phase axis dislocation and abnormal reflection occur in dashed frames C and D.
In advanced geological forecast in a tunnel, the method mainly corresponds to diseases such as surrounding rock fragmentation, karst development, karst cave, erosion cracks and the like; the preliminary judgment can be performed according to the abnormal characteristics, and the subsequent cross and comprehensive judgment can be performed by combining the micro-exploration methods in the steps 301-302.
In the step 104, the step of obtaining the vertical formation profile information in the shallow area from the ground to the second target depth includes the following steps:
601: arranging geological radar measuring lines at the ground projection position and two sides of the tunneling direction of the tunnel face; specifically, a geological radar measuring line is respectively arranged at the ground projection position and two sides of the tunneling direction of the tunnel face of the tunnel, and the distance between adjacent geological radar measuring lines is determined according to actual exploration needs, for example, 2m.
602: And selecting a geological radar antenna, and acquiring vertical stratum profile information in a shallow area from the ground to the depth of the second target layer by adopting a distance measurement method and exciting and receiving electromagnetic wave signals.
The frequency of the selected geological radar antenna is determined according to actual exploration requirements, for example, the frequency of the geological radar antenna is 200MHz.
In the step 104, based on the vertical stratum profile information, the preliminary disease type and disease position in the shallow area are obtained, which includes the following steps:
And performing geological interpretation on the vertical stratum profile information, and determining the disease type and disease position of each abnormal region. Wherein, at this time, the disease type includes loosening and void removal.
For geological radar, the abnormal characteristics on the interpretation result image include electromagnetic wave signal reflection disorder, in-phase axis dislocation, frequency abnormality, reflection enhancement and the like, and can be identified according to experience of professionals or obvious changes on the image.
In the geological forecast of the shallow part of the ground, the soil is mainly corresponding to the diseases such as severe loose roadbed (non-compact filling), void, soil hole and the like; the preliminary judgment can be performed according to the abnormal characteristics, and the subsequent cross and comprehensive judgment can be performed by combining the micro-exploration methods in the steps 301-302.
In a word, the comprehensive geophysical prospecting method is adopted, and the construction period with larger risk of road surface settlement and collapse and serious consequences in shallow tunnel construction is selected for exploration, so that the safety of engineering construction can be effectively ensured.
By three-in-one and orderly exploration of the ground surface, the tunnel body and the middle stratum in the shallow tunnel construction process, the application not only can effectively treat potential engineering risks, but also can well reflect the contribution to the cause research of urban road diseases.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The pavement disease exploration method in urban shallow tunnel construction is characterized by comprising the following steps:
determining a exploration crossing area in the range from the design depth of the tunnel body to the ground;
acquiring a transverse wave velocity profile of the ground to a deep region of the first target layer depth, and acquiring a preliminary disease type and disease position in the deep region based on the transverse wave velocity profile, wherein the deep region at least partially coincides with the exploration crossing region;
Acquiring front stratum section information in a tunneling direction setting area of a tunnel face, and acquiring preliminary disease types and disease positions in the setting area based on the front stratum section information, wherein the setting area is at least partially overlapped with a exploration crossing area;
The method comprises the steps of obtaining vertical stratum profile information in a shallow area from the ground to a second target layer depth, and obtaining preliminary disease types and disease positions in the shallow area based on the vertical stratum profile information, wherein the shallow area at least partially coincides with a exploration crossing area, and the second target layer depth is smaller than the first target layer depth;
And determining the final pavement defect type and defect position in shallow tunnel construction based on the preliminary defect type and defect position in the deep region, the set region and the shallow region.
2. The method for detecting pavement damage in urban shallow tunnel construction according to claim 1, wherein the step of acquiring a transverse wave velocity profile of the ground in a deep region from the ground to the first target layer depth comprises the steps of:
Arranging a micro-motion exploration survey line at a ground projection position in the tunneling direction of a tunnel face;
an observation system is arranged, and micro-motion information in a deep region from the ground to the depth of the first target layer is collected;
and extracting a phase velocity dispersion curve based on the inching information, and executing transverse velocity inversion on the dispersion curve to obtain a transverse velocity profile.
3. The method for exploring road surface defects in urban shallow tunnel construction according to claim 2, wherein the method comprises the following steps:
The arrangement mode of the observation system is linear or L-shaped;
The observation system parameters were set to a point spacing of 2m and a track spacing of 2m.
4. The method for detecting pavement damage in urban shallow tunnel construction according to claim 1, wherein the step of obtaining the preliminary damage type and damage position in the deep area based on the apparent transverse wave velocity profile comprises the steps of:
geological interpretation is carried out on the transverse wave velocity profile, and the area with the transverse wave velocity outside the set transverse wave velocity range is marked as an abnormal area;
based on the apparent transverse wave speed of the abnormal areas, the disease type and the disease position of each abnormal area are preliminarily determined.
5. The method for detecting pavement damage in urban shallow tunnel construction according to claim 1, wherein the step of acquiring the front stratum profile information in the tunnel face heading direction setting area of the tunnel face comprises the steps of:
arranging a linear geological radar survey line at the position of a tunnel face in a tunnel;
And selecting a geological radar antenna, and acquiring the front stratum section information in a tunneling direction setting area of the tunnel face by adopting a point measurement method and exciting and receiving electromagnetic wave signals.
6. The method for detecting pavement damage in urban shallow tunnel construction according to claim 1, wherein the step of acquiring the front stratum profile information in the tunnel face heading direction setting area of the tunnel face comprises the steps of:
arranging a seismic source excitation device and a signal receiving device in the tunnel;
and exciting a seismic source by using a seismic source excitation device, and receiving a reflected signal by using a signal receiving device to obtain the front stratum profile information in the tunneling direction setting area of the tunnel face.
7. The method for detecting pavement damage in urban shallow tunnel construction according to claim 1, wherein the preliminary damage type and damage position in the set area are obtained based on the front stratum profile information, comprising the steps of:
And performing geological interpretation on the front stratum profile information, and determining the disease type and disease position of each abnormal region.
8. The method for detecting pavement damage in urban shallow tunnel construction according to claim 1, wherein the step of acquiring vertical stratum profile information in a shallow area from the ground to the second target layer depth comprises the steps of:
Arranging geological radar measuring lines at the ground projection position and two sides of the tunneling direction of the tunnel face;
and selecting a geological radar antenna, and acquiring vertical stratum profile information in a shallow area from the ground to the depth of the second target layer by adopting a distance measurement method and exciting and receiving electromagnetic wave signals.
9. The method for detecting pavement damage in urban shallow tunnel construction according to claim 1, wherein the preliminary damage type and damage position in the shallow area are obtained based on the vertical stratum profile information, comprising the steps of:
And performing geological interpretation on the vertical stratum profile information, and determining the disease type and disease position of each abnormal region.
10. The method for exploring road surface defects in urban shallow tunnel construction according to claim 1, wherein the method comprises the following steps:
The first destination layer depth was 30m and the second destination layer depth was 3m.
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| CN202310380767.0A CN116299683B (en) | 2023-04-11 | Pavement disease exploration method in urban shallow tunnel construction |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251605A (en) * | 2008-04-17 | 2008-08-27 | 中铁二局股份有限公司 | Method for forecasting advanced geology for tunnel construction |
| CN109613616A (en) * | 2018-12-20 | 2019-04-12 | 中交第三航务工程局有限公司 | A kind of comprehensive three-dimensional probe method of shallow survey tunnel geology |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251605A (en) * | 2008-04-17 | 2008-08-27 | 中铁二局股份有限公司 | Method for forecasting advanced geology for tunnel construction |
| CN109613616A (en) * | 2018-12-20 | 2019-04-12 | 中交第三航务工程局有限公司 | A kind of comprehensive three-dimensional probe method of shallow survey tunnel geology |
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