CN102736124B - Tunnel excavation surrounding rock dynamic refined classification method based on integrated parameters - Google Patents
Tunnel excavation surrounding rock dynamic refined classification method based on integrated parameters Download PDFInfo
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Abstract
The invention discloses a tunnel excavation surrounding rock dynamic refined classification method based on integrated parameters. The method comprises the following steps of: analyzing tunnel prospective design data, preliminarily judging classification of tunnel surrounding rocks, performing integrated parameter advance geological forecasting exploration on excavation tunnel face surrounding rocks, and correcting classification of a tunnel face and front surrounding rocks according to a forecasting result; performing geological recording observation on tunnel face excavation surrounding rocks, performing elastic wave velocity testing, and further correcting classification of the surrounding rocks of the tunnel face according to observation data and elastic wave velocity testing data; and performing monitoring measurement according to each construction step, and correcting the obtained classification of the surrounding rocks of the tunnel face according to monitoring measurement data to finish a cycle of surrounding rock refined classification. The method has the advantages that on the basis of analyzing the prospective design data and determining classification of the surrounding rocks, tunnel surrounding rocks in a construction stage are subjected to dynamic integrated refined classification by integrated operation of integrated parameter advance geological forecasting, tunnel face surrounding rock integrated exploration and field monitoring data analysis, so the classification of the surrounding rocks is refined and accurate.
Description
Technical field
The present invention relates to the dynamic refinement stage division of the tunnel excavation country rock based on comprehensive parameters and device thereof in a kind of constructing tunnel process.
Background technology
China's tunnel construction had entered a peak period in recent years, greatly developing of Tunnel Engineering, for the development of tunnel construction technology provides condition, at present in the constructing tunnel stage, country rock refinement classification is the common important topic of paying close attention to of designer, workmen and scientific research personnel.Generally, complete fender graded system should comprise design phase fender graded and construction stage fender graded two parts content.
In classification of tunnel surroun ding rock, also lack effective, a perfect construction stage country rock refinement staging hierarchy at present, cause fender graded accurate not, in work progress, both likely occurred that country rock refinement classification judgement occurs that lower than actual Grades of Surrounding Rock surrounding rock supporting insufficient strength causes construction accident to occur, and also likely occurred that country rock refinement classification judgement occurs the excessive wasting situation of surrounding rock supporting intensity higher than actual Grades of Surrounding Rock situation.
Therefore need a kind of country rock refinement stage division in constructing tunnel process badly, in work progress to again country rock being carried out to refinement classification on the basis of design phase fender graded, improve the accuracy rate of fender graded.
Summary of the invention
The object of the invention is to overcome existing tunnel fender graded method degree of refinement not enough and can not be effectively for the technical matters of constructing tunnel service provides a kind of tunnel excavation country rock based on comprehensive parameters dynamic refinement stage division, be intended to solve the problem of dividing construction supporting waste that problem that stage is inadequate causes and supporting deficiency to cause construction accident due to country rock refinement in constructing tunnel process.
For achieving the above object, the technical solution used in the present invention is as follows:
The dynamic refinement stage division of tunnel excavation country rock based on comprehensive parameters, comprises the following steps:
1), analyze tunnel inspection of the scene of a crime design data, tentatively judge tunnel tunnel face fender graded;
2), utilize USEP21 underground engineering construction advanced geology prediction system to carry out the detection of comprehensive parameters advance geologic prediction to described face country rock, and according to the fender graded of the described face obtaining in the forecast detection data correction step 1) obtaining;
3), described face country rock is carried out geologic observations and carries out longitudinal elastic wave wave velocity testing, according to the observed data and the longitudinal elastic wave wave velocity testing data correction step 2 that obtain) in the fender graded of the described face that obtains;
4), the parameters in work progress is carried out to monitoring measurement, and according to the fender graded of the described face obtaining in the monitoring measurement data correction step 3) of obtaining.
The USEP21 of utilization underground engineering construction advanced geology prediction system of the present invention carries out the detection of comprehensive parameters advance geologic prediction to described face country rock, and according to the step of the fender graded of the described face obtaining in the forecast detection data correction step 1) obtaining, specifically comprise:
Utilize seismic event that described face country rock is grown apart from comprehensive parameters advance geologic prediction and surveyed, according to the forecast of the matter over long distances detection data obtaining, judge the fender graded of the place ahead, described tunnel face;
In work progress, utilizing electromagnetic wave to carry out short distance comprehensive parameters advance geologic prediction to described face country rock surveys;
When running into the special location of significant points, by boring and coring, carry out indoor checking and borehole test means and face country rock geological condition is evaluated and revised quantize described face fender graded.
Length of the present invention is greater than 100 meters apart from referring to, described short distance refers to and is less than 30 meters.
The present invention carries out geologic observations and carries out longitudinal elastic wave wave velocity testing described face country rock, according to the observed data and the longitudinal elastic wave wave velocity testing data correction step 2 that obtain) in the step of the described face fender graded that obtains specifically comprise:
Described face country rock is carried out to geologic observations, situation uses geological record method to analyze the good working condition of described face rock mass, underground water and initial stress state according to the observation, if desired rock rock mass is carried out to mechanical test, contrast tunnel related specifications judges the fender graded of described face;
Test the longitudinal elastic wave velocity of wave of described face country rock, try to achieve the average elasticity longitudinal wave velocity of described face country rock, with reference to the corresponding relation of classification of tunnel surroun ding rock and longitudinal elastic wave velocity of wave, determine the fender graded of described face;
If when near the fender graded described face of above-mentioned two kinds of methods judgement is basically identical, finish this step, otherwise image data sample is tested and according to face fender graded described in test result correction.
The present invention is real comprises spacing, state and the form in face state, face catamorphism situation, face crack, underground water burst situation to the scope of described face country rock geologic observations.
The average elasticity longitudinal wave velocity that the present invention calculates described face country rock is in the following way:
Focal point is fixed on to described face, position by mobile reception sensor changes measuring distance, or receiving sensor is fixed on to described face, by Moving seismic source, put and change measuring distance, mode of excitation adopts hammering iron plate focus, test the longitudinal elastic wave velocity of wave at described face country rock multiple spot place, and calculate the average elasticity longitudinal wave velocity of described face country rock.
Monitoring measurement data of the present invention comprise tunnel vault sedimentation value, perimeter convergence value, pressure from surrounding rock value, reinforcement stresses value and just prop up crack and have or not.
The dynamic refinement hierarchy system of tunnel excavation country rock based on comprehensive parameters, comprises forecast system, monitoring and acquisition system, measuring system and computing machine;
Described forecast system is USEP21 underground engineering construction advanced geology prediction system, for face country rock being carried out to the detection of comprehensive parameters advance geologic prediction, and according to the fender graded of the forecast detection data correction face obtaining;
Described forecast system comprises USP underground engineering construction Preceding geology predictor and UEP underground engineering construction Preceding geology predictor; Described USP underground engineering construction Preceding geology predictor, for by utilizing seismic event that described face country rock is grown apart from comprehensive parameters advance geologic prediction and surveyed, the matter over long distances of acquisition forecast detection data; Described UEP underground engineering construction Preceding geology predictor, for surveying by utilizing electromagnetic wave to carry out short distance comprehensive parameters advance geologic prediction to described face country rock, obtains short distance geologic prediction detection data;
Described USP underground engineering construction Preceding geology predictor also comprises: initiator, Multi-component earthquake wave space receiving trap, Multichannel synchronized signal collection device; Described initiator is used for causing station, described face country rock spot; Described Multi-component earthquake wave space receiving trap is for receiving the seismic event being produced by described initiator initiation earthquake; Described Multichannel synchronized signal collection device is for gathering vibration and the fluctuating signal of the face country rock causing because of earthquake;
Described UEP underground engineering construction Preceding geology predictor also comprises: electromagnetic wave transmitter, electromagnetic wave receiver and Multichannel synchronized signal collection device; Described electromagnetic wave transmitter is used at described face country rock emitting electromagnetic wave; The electromagnetic wave that described electromagnetic wave receiver returns for being received from described face country rock, described Multichannel synchronized signal collection device is the feedback signal from described face country rock for synchronous acquisition;
Described monitoring system comprises spirit-leveling instrument, convergence gauge, pressure cell, reinforcing rib meter and crack observer; Described spirit-leveling instrument is used for measuring tunnel vault sedimentation value; Convergence gauge is used for obtaining perimeter convergence value; Pressure cell is for obtaining the pressure from surrounding rock value being embedded between country rock steel arch frame, and described reinforcing rib meter is for obtaining reinforcement stresses value by measurement, and described crack observer is used for obtaining a just crack value;
Described measuring system comprises face country rock compressional wave receiver and longitudinal elastic wave wave velocity testing instrument, for obtaining the longitudinal elastic wave velocity of wave of described face country rock;
The internal main of described computing machine will comprise data processing module, data memory module and data disaply moudle, and described data disaply moudle is used for connecting display, shows the fender graded structure of face; Described data memory module is used for storing Monitoring Data, collection signal, long and short apart from geologic prediction detection data; Described data processing module is for the treatment of the data of memory stores.
The present invention is by the basis of the definite fender graded of prospective design analysis, integrated use comprehensive parameters advance geologic prediction, face country rock comprehensive survey and field monitoring data analysis are carried out comprehensive refinement classification to the tunnel surrounding that encloses of construction stage again, thereby make fender graded refinement more, accurate.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the dynamic refinement stage division of tunnel excavation country rock based on comprehensive parameters that provides of the embodiment of the present invention.
Fig. 2 is the process flow diagram that face country rock is carried out to comprehensive parameters advance geologic prediction detection classification that the embodiment of the present invention provides.
Fig. 3 is the process flow diagram to face country rock geologic observations and the classification of longitudinal elastic wave wave velocity testing that the embodiment of the present invention provides.
Fig. 4 is the dynamic refinement stage division of the country rock process flow diagram that the embodiment of the present invention provides.
Fig. 5 be the embodiment of the present invention provide based on prospective design analysis method fender graded method flow diagram.
Fig. 6 is the advance geologic prediction method fender graded method flow diagram based on comprehensive parameters that the embodiment of the present invention provides.
Fig. 7 be the embodiment of the present invention provide based on face country rock comprehensive survey method fender graded method flow diagram.
Fig. 8 be the embodiment of the present invention provide based on field monitoring data analysis method fender graded method flow diagram.
Fig. 9 is the schematic diagram of the dynamic refinement hierarchy system of the tunnel excavation country rock block diagram based on comprehensive parameters that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the present invention is further elaborated.
Shown in Figure 1, the dynamic refinement stage division of a kind of tunnel excavation country rock based on comprehensive parameters, comprises the following steps:
S101: analyze tunnel inspection of the scene of a crime design data, tentatively judge tunnel tunnel face fender graded;
In constructing tunnel process, carry out the dynamic refinement classification of country rock, first to collect the construction tunnel surveying design data in early stage, the Grades of Surrounding Rock of current face and front of tunnel heading is had substantially and understood, prospective design analysis method is in the method for scene being surveyed, monitoring means is investigated and analysed prospecting data before obtaining data, being basis and the prerequisite of country rock refinement classification, is the means the most easily that obtain in-situ data.Therefore, tunnel is being carried out before construction stage country rock refinement classification, first collect the prospecting data in tunnel and it is analyzed, the residing environment in Dui Suizhi district, topography and geomorphology, lithological change, the information such as tomography distribution and Grades of Surrounding Rock variation are analyzed, the rough description of prospecting data Shi Dui Tunnel Passing district topography and geomorphology, stratum and lithology that therefrom can Dui Suizhi district, tectonic structure, the distribution situation of hydrogeological condition and unfavorable geology and special rock soil has substantially to be understood, by shop experiment, can obtain the rate of decay situation of physical-mechanical properties of rock and rock mass, and according to probing, field observation, in-situ test in hole, rock sample indoor test data and geological mapping and physical prospecting achievement are obtained earth's surface to the geological state of the following country rock in Tunnel Passing district, the gross index of integrated degree and country rock, and tentatively judge thus country rock grade.
By analyzing prospective design data, directly to obtain fender graded situation be the direct method that obtains the preliminary classification of country rock, workmen constructs according to the fender graded situation in prospective design data, but because the sampling rate of phase of exploration is lower, the sectional fender graded of portion of judgement may not be inconsistent with actual country rock situation thus, this just requires in work progress, the fender graded situation that adopts several different methods to carry out phase of exploration is carried out refinement classification or correction, to ensure safety for tunnel engineering; Therefore, the present invention is by analyzing after inspection of the scene of a crime design data in tunnel tentatively judges tunnel tunnel face fender graded, adopts the further Analysis deterrmination face of the method fender graded described in following steps S102.
S102: utilize USEP21 underground engineering construction advanced geology prediction system, described face country rock is carried out to the detection of comprehensive parameters advance geologic prediction, and according to the fender graded of the described face obtaining in the forecast detection data correction step S101 obtaining;
Thereby the fender graded that carries out that carries out the detection of comprehensive parameters advance geologic prediction utilizes the detection of USEP21 underground engineering construction advanced geology prediction system, at built tunnel the place ahead face geological condition, face is carried out to fender graded.After prospective design analysis, the situations such as the topography and geomorphology in tunnel tunnel face front fender graded and Sui Zhi district, formation lithology, tectonic structure are had to a certain degree and understood, on this basis tunnel tunnel face front geological condition is carried out to comprehensive parameters forecast and survey, can further grasp face Grades of Surrounding Rock situation.
The process flow diagram that face country rock is carried out to comprehensive parameters advance geologic prediction detection classification shown in Figure 2.The described USEP21 underground engineering construction advanced geology prediction system that utilizes carries out the detection of comprehensive parameters advance geologic prediction to described face country rock, and according to the step of the fender graded of the described face obtaining in the forecast detection data correction step S101 obtaining, specifically comprise:
S201: utilize seismic event that described face country rock is grown apart from comprehensive parameters advance geologic prediction and surveyed, according to the forecast of the matter over long distances detection data obtaining, judge the fender graded of the place ahead, described tunnel face;
To described face country rock, growing apart from the detection of comprehensive parameters advance geologic prediction is mainly to utilize the velocity of wave of seismic event to test architectonic sensitivity, by test and according to test result, construction the place ahead fender graded is made to preliminary judgement, the fender graded in prospective design stage is revised;
When application, can near described face country rock, detonate by initiator and cause described face country rock generation earthquake, then by Multi-component earthquake wave space receiving trap, receive by described initiator and cause the seismic event that earthquake produces, and the integrated signal of the vibration of the face country rock causing because of earthquake by Multichannel synchronized signal collection device synchronous acquisition and fluctuating signal etc., then by USEP21 underground engineering construction advanced geology prediction system, utilizing the earthquake receiving to involve described vibration and fluctuating signal grows apart from comprehensive parameters advance geologic prediction and surveys described face country rock.
S202: survey utilizing electromagnetic wave to carry out short distance comprehensive parameters advance geologic prediction to described face country rock in work progress, use described in the short distance geologic prediction detection data check obtaining matter forecast detection data over long distances; Short distance comprehensive parameters advance geologic prediction detection accuracy is high, can further to front of tunnel heading country rock data, make more accurate judgement, thereby further revise fender graded;
Concrete grammar is, by electromagnetic wave transmitter, near described face country rock, carry out electromagnetic transmitting, by electromagnetic wave receiver, be received from the electromagnetic wave that described face country rock returns, the various signals that simultaneously feed back from described face country rock by Multichannel synchronized signal collection device synchronous acquisition, by USEP21 underground engineering construction advanced geology prediction system, according to the received electromagnetism returning, involve various feedback signals, described face country rock is carried out to short distance comprehensive parameters advance geologic prediction and survey.
S203: adopt boring checking and gaging hole evaluation correction to quantize fender graded when running into significant points or special bottom;
S204: carry out next step country rock refinement classification.
Described boring checking and gaging hole means comprise single-hole method or cross hole method gaging hole.
In the present invention, described length is greater than 100 meters apart from referring to, described short distance refers to and is less than 30 meters.
Growing apart from advance geologic prediction utilizes seismic event to carry out architectonic susceptibility principle, logical long-distance advance geologic prediction is made after preliminary judgement construction the place ahead country rock hydrogeology situation of change, by forecast geological condition and the comparison of face geological condition, from face Grades of Surrounding Rock, infer front of tunnel heading Grades of Surrounding Rock situation of change; Then utilize electromagnetic wave to the susceptibility principle of water to face before 30m country rock data carry out high precision short distance forecast, thereby refinement fender graded; Running into significant points or special location must carry out boring and coring and carry out indoor checking, single-hole method or cross hole method gaging hole and revise quantification fender graded.
S103: described face country rock is carried out geologic observations and carries out longitudinal elastic wave wave velocity testing, according to the fender graded of the described face obtaining in the observed data obtaining and longitudinal elastic wave wave velocity testing data correction step S102;
Although the comprehensive parameters advance geologic prediction probe method described in step S102 can be by the further refinement of fender graded, but because advance geologic prediction investigative range is larger, country rock situation interpretation precision for the thin portion in tunnel is lower, there will be and the differentiated situation of actual country rock situation aspect country rock refinement classification; In constructing tunnel process, even at early stage prospecting and advance geologic prediction stage country rock in order, also likely in the explosion in later stage or digging process, destroy original geologic structure, Grades of Surrounding Rock is raise, so the fender graded of working-yard can be to the directive function of having constructed.
It is directly to obtain at the construction field (site) the effective ways of face country rock situation that face country rock is carried out to comprehensive survey, compares the country rock wave velocity testing in tunnel surveying stage, and face longitudinal elastic wave wave velocity testing more approaches actual country rock situation.
In the embodiment of the present invention, the process flow diagram to face country rock geologic observations and the classification of longitudinal elastic wave wave velocity testing shown in Figure 3.Described face country rock is carried out geologic observations and carries out longitudinal elastic wave wave velocity testing, according to the step of the described face fender graded obtaining in the observed data obtaining and longitudinal elastic wave wave velocity testing data correction step S102, specifically comprise:
S301: described face country rock is carried out to geologic observations, situation uses geological record method to analyze the good working condition of described face rock mass, underground water and initial stress state according to the observation, if desired rock rock mass is carried out to mechanical test, contrast tunnel related specifications judges the fender graded of described face;
S302: test the longitudinal elastic wave velocity of wave of described face country rock, try to achieve the average elasticity longitudinal wave velocity of described face country rock, with reference to the corresponding relation of classification of tunnel surroun ding rock and longitudinal elastic wave velocity of wave, determine the fender graded of described face;
S303: if enter step S104 when near the fender graded described face of above-mentioned two kinds of methods judgement is basically identical, otherwise enter next step;
S304: image data sample is tested and according to face fender graded described in test result correction.
In the present invention, the scope of described face country rock geologic observations is comprised to the situations such as impact of face state, face catamorphism situation, spacing, state and the form in face crack, underground water burst, water.
In the present invention, calculate the average elasticity longitudinal wave velocity of described face country rock in the following way:
Focal point is fixed on to described face, position by mobile reception sensor changes measuring distance, or receiving sensor is fixed on to described face, by Moving seismic source, put and change measuring distance, mode of excitation adopts hammering iron plate focus, test the longitudinal elastic wave velocity of wave of many places, described face country rock multiple spot place, and calculate the average elasticity longitudinal wave velocity of described face country rock.
At face, carry out wave velocity testing, country rock situation interpretation precision to the thin portion in tunnel is higher, after explosion or excavation, carry out velocity of wave detection at every turn, can capture in time the situation of change of country rock again, in wave velocity testing process, adopt the mode of hammering iron plate focus to excite, by fixedly position or the fixed reception sensor Moving seismic source point of focal point mobile reception sensor change measuring distance, thereby progressively test the longitudinal elastic wave velocity of wave at face multiple spot place, ask its mean value as the final longitudinal elastic wave velocity of wave of face, and with reference to longitudinal elastic wave velocity of wave and classification of tunnel surroun ding rock corresponding relation, determine the Grades of Surrounding Rock of face.
By aforesaid geologic observations, analyzing and two kinds of methods of wave velocity testing are carried out comprehensive survey to face country rock and follow the tracks of constructing tunnel and carry out, is the effective ways that accurately directly face country rock carried out to refinement classification.
S104: the parameters in work progress is carried out to monitoring measurement, and according to the fender graded of the described face obtaining in the monitoring measurement data correction step S103 obtaining.
Described monitoring measurement data comprise tunnel vault sedimentation value, perimeter convergence value, pressure from surrounding rock value, reinforcement stresses value and just prop up crack and have or not.
Described tunnel vault sedimentation value is measured acquisition by spirit-leveling instrument, described perimeter convergence value is obtained by convergence gauge, described pressure from surrounding rock value is obtained by the pressure cell being embedded between country rock steel arch frame, described reinforcement stresses value obtains through reinforcing rib meter measurement, and first described crack value obtains by crack observer.
Field monitoring data are reactions of tunnel surrounding supporting situation in work progress, field monitoring data analysis is to the monitoring measurement data analysis in constructing tunnel process, utilize the data of monitoring measurement in constructing tunnel process to carry out country rock classification, Monitoring Data comprises tunnel vault sedimentation value, perimeter convergence value, pressure from surrounding rock and reinforcement stresses etc.By the monitoring measurement data analysis to described, whether high or low to judge the fender graded of face, according to circumstances to revise, or improve or reduce fender graded.
If the tunnel deformation in work progress is the common reflection of geologic condition and supporting condition, analyze field monitoring data and know that tunnel wall rock deformation and force value are when larger, illustrate under current geologic condition a little less than surrounding rock supporting, illustrate that determined fender graded of prospective design stage is lower than actual Grades of Surrounding Rock, palpus rising Grades of Surrounding Rock, strengthens support form; When surrouding rock deformation and force value hour, the Grades of Surrounding Rock of explanation design is approaching with actual country rock situation, need not revise Grades of Surrounding Rock; When surrouding rock deformation is too small, the Grades of Surrounding Rock of explanation design is too high, depending on field condition, can suitably reduce Grades of Surrounding Rock.
In the embodiment of the present invention, shown in Figure 4, the dynamic refinement stage division of country rock process flow diagram.The first step: analyze prospective design in early stage data, tentatively grasp fender graded situation; Second step: carry out tunnel excavation construction, apart from comprehensive parameters advance geologic prediction, prospective design stage fender graded is carried out to refinement to long, high precision short distance forecast front of tunnel heading 30m country rock is done accurately judgement to fender graded; If all are normal, enter the 3rd step: to face geological record observation and the test of elastic wave longitudinal wave velocity, revise fender graded; If run into special location or significant points, adopt boring and coring checking and gaging hole evaluation correction to quantize the method for fender graded, thereby enter the 3rd step, country rock is revised; Revise and enter the 4th step later: by monitoring measurement, analyze Monitoring Data, checking fender graded, guiding construction.And so forth, repeat the first step to the four steps, tunnel excavation carries out next circulation fender graded.
In the embodiment of the present invention, shown in Figure 5, the embodiment of the present invention provide based on prospective design analysis method fender graded method flow diagram.First analyze prospective design in the early stage data in tunnel, further grasp classification of tunnel surroun ding rock situation, the last fender graded method based on comprehensive parameters advance geologic prediction is carried out comprehensive refinement classification.In conjunction with Fig. 6, Fig. 6 is the advance geologic prediction method fender graded method flow diagram based on comprehensive parameters that the embodiment of the present invention provides.-utilize seismic event to architectonic susceptibility, at tunnel tunnel face, to grow apart from advance geologic prediction, forecast distance is greater than 100m, according to weather report result contrast the fender graded situation in face country rock situation judgement the place ahead, tunnel; Utilize the susceptibility of electromagnetic wave to water, at tunnel tunnel face, carry out short distance advance geologic prediction, forecast distance is less than 30m, the checking forecast result of long distance measurement and the fender graded situation in tunnel, if run into significant points or special location, adopt boring and coring checking and gaging hole evaluation correction to quantize, result of detection contrast related specifications fender graded situation is revised, and carries out face country rock comprehensive survey method and carry out fender graded after revising.Fig. 7 embodiment of the present invention provide based on face country rock comprehensive survey method fender graded method flow diagram.Face country rock comprehensive survey method fender graded carries out respectively face country rock geologic observations and the test of face country rock longitudinal wave velocity, face country rock geologic observations mainly comprises: the impact of face state, catamorphism, fracture spacing, crack state, crack form, water burst, water, then according to the observation to data contrast tunnel related specifications, judgement tunnel tunnel face Grades of Surrounding Rock situation.After carrying out the test of face country rock longitudinal wave velocity, by result of detection and related specifications contrast, the fender graded situation of judgement face.Two kinds of classification situations are contrasted, and when both Grades of Surrounding Rock judgements, when result is more or less the same, field monitoring data analysis method carries out fender graded.If when both Grades of Surrounding Rock judgement structures differ larger, return and carry out taking data sample to re-start test comparison more.Fig. 8 be the embodiment of the present invention provide based on field monitoring data analysis method fender graded method flow diagram.To near monitoring measurement of wall rock data analysis tunnel tunnel face, adopt spirit-leveling instrument, convergence gauge, pressure cell, reinforcing rib meter, crack observer etc., concrete monitoring measurement vault sedimentation value, perimeter convergence value, pressure from surrounding rock value, reinforcement stresses value, just prop up and have free from flaw etc., these values are analyzed to force value and whether surpass standard permissible value, just prop up and have free from flaw, if force value surpasses standard permissible value, the Grades of Surrounding Rock of explanation judgement is lower than actual Grades of Surrounding Rock, if pressure value is over standard permissible value, the Grades of Surrounding Rock of explanation judgement is higher or identical than actual Grades of Surrounding Rock.
Fig. 9 is the schematic diagram of the dynamic refinement hierarchy system of the tunnel excavation country rock block diagram based on comprehensive parameters that provides of the embodiment of the present invention.The dynamic refinement hierarchy system of this tunnel excavation country rock based on comprehensive parameters, comprises forecast system, monitoring and acquisition system, measuring system and computing machine.
Described forecast system is USEP21 underground engineering construction advanced geology prediction system, for face country rock being carried out to the detection of comprehensive parameters advance geologic prediction, and according to the fender graded of the forecast detection data correction face obtaining.
Described forecast system comprises USP underground engineering construction Preceding geology predictor and UEP underground engineering construction Preceding geology predictor; Described USP underground engineering construction Preceding geology predictor, for by utilizing seismic event that described face country rock is grown apart from comprehensive parameters advance geologic prediction and surveyed, the matter over long distances of acquisition forecast detection data; Described UEP underground engineering construction Preceding geology predictor, for surveying by utilizing electromagnetic wave to carry out short distance comprehensive parameters advance geologic prediction to described face country rock, obtains short distance geologic prediction detection data.
Described USP underground engineering construction Preceding geology predictor also comprises: initiator, Multi-component earthquake wave space receiving trap, Multichannel synchronized signal collection device; Described initiator is used for causing seismic event; Described Multi-component earthquake wave space receiving trap is for receiving the seismic event being produced by described initiator initiation earthquake; Described Multichannel synchronized signal collection device is for gathering vibrations and the fluctuating signal of the face country rock causing because of seismic event.
Described UEP underground engineering construction Preceding geology predictor also comprises: electromagnetic wave transmitter, electromagnetic wave receiver and Multichannel synchronized signal collection device; Described electromagnetic wave transmitter is used at described face country rock emitting electromagnetic wave; The electromagnetic wave that described electromagnetic wave receiver returns for being received from described face country rock, described Multichannel synchronized signal collection device is the feedback signal from described face country rock for synchronous acquisition.
Described monitoring system comprises spirit-leveling instrument, convergence gauge, pressure cell, reinforcing rib meter and crack observer etc.; Described spirit-leveling instrument is used for measuring tunnel vault sedimentation value; Convergence gauge is used for obtaining perimeter convergence value; Pressure cell is for obtaining the pressure from surrounding rock value being embedded between country rock steel arch frame, and described reinforcing rib meter is for obtaining reinforcement stresses value by measurement, and described crack observer is used for obtaining a just crack value.
Described measuring system comprises face country rock compressional wave receiver and longitudinal elastic wave wave velocity testing instrument, for obtaining the longitudinal elastic wave velocity of wave of described face country rock.
The internal main of described computing machine will comprise data processing module, data memory module and data disaply moudle, and described data disaply moudle is used for connecting display, and the country rock comprehensive parameters that shows face is sentenced and translated result; Described data memory module is used for storing Monitoring Data, collection signal, long and short apart from geologic prediction detection data; Described data processing module is for the treatment of the data of memory stores.
The present invention is by the basis of the definite fender graded of prospective design analysis, integrated use comprehensive parameters advance geologic prediction, face country rock comprehensive survey and field monitoring data analysis are carried out comprehensive refinement classification to the tunnel surrounding that encloses of construction stage again, the present invention due to be before tunnel excavation, in tunnel excavation process and after tunnel excavation respectively the Grades of Surrounding Rock to tunnel revise refinement, thereby make fender graded refinement more, accurately.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the dynamic refinement stage division of the tunnel excavation country rock based on comprehensive parameters, is characterized in that, comprises the following steps:
1), analyze tunnel inspection of the scene of a crime design data, tentatively judge tunnel tunnel face fender graded;
2), utilize USEP21 underground engineering construction advanced geology prediction system to carry out the detection of comprehensive parameters advance geologic prediction to described face country rock, and according to the fender graded of the described face obtaining in the forecast detection data correction step 1) obtaining;
3), described face country rock is carried out geological record observation and carries out longitudinal elastic wave wave velocity testing, according to the observed data and the longitudinal elastic wave wave velocity testing data correction step 2 that obtain) in the fender graded of the described face that obtains;
4), the parameters in construction way is carried out to monitoring measurement, and according to the fender graded of the described face obtaining in the monitoring measurement data correction step 3) of obtaining;
The described USEP21 underground engineering construction advanced geology prediction system that utilizes carries out the detection of comprehensive parameters advance geologic prediction to described face country rock, and according to the step of the fender graded of the described face obtaining in the forecast detection data correction step 1) obtaining, specifically comprise:
Utilize seismic event that described face country rock is grown apart from comprehensive parameters advance geologic prediction and surveyed, according to the forecast of the matter over long distances detection data obtaining, judge the fender graded of the place ahead, described tunnel face;
In work progress, utilizing electromagnetic wave to carry out short distance comprehensive parameters advance geologic prediction to described face country rock surveys;
Described length is greater than 100 meters apart from referring to, described short distance refers to and is less than 30 meters;
When running into the special location of significant points, by boring and coring, carry out indoor checking and borehole test means and face country rock geological condition is evaluated and revised quantize described face fender graded;
Described face country rock is carried out geologic observations and carries out longitudinal elastic wave wave velocity testing, according to the observed data and the longitudinal elastic wave wave velocity testing data correction step 2 that obtain) in the step of the described face fender graded that obtains specifically comprise:
Described face country rock is carried out to geologic observations, situation uses geological record method to analyze the good working condition of described face rock mass, underground water and initial stress state according to the observation, if desired rock rock mass is carried out to mechanical test, contrast tunnel related specifications judges the fender graded of described face;
Test the longitudinal elastic wave velocity of wave of described face country rock, try to achieve the average elasticity longitudinal wave velocity of described face country rock, with reference to the corresponding relation of classification of tunnel surroun ding rock and longitudinal elastic wave velocity of wave, determine the fender graded of described face;
If when near the fender graded described face of above-mentioned two kinds of methods judgement is basically identical, finish this step, otherwise image data sample is tested and according to face fender graded described in test result correction.
2. the dynamic refinement stage division of the tunnel excavation country rock based on comprehensive parameters according to claim 1, it is characterized in that, the scope of described face country rock geologic observations is comprised to spacing, state and the form in face state, face catamorphism situation, face crack, underground water burst situation.
3. the dynamic refinement stage division of the tunnel excavation country rock based on comprehensive parameters according to claim 1, is characterized in that, calculates the average elasticity longitudinal wave velocity of described face country rock in the following way:
Focal point is fixed on to described face, position by mobile reception sensor changes measuring distance, or receiving sensor is fixed on to described face, by Moving seismic source, put and change measuring distance, mode of excitation adopts hammering iron plate focus, test the longitudinal elastic wave velocity of wave at described face country rock multiple spot place, and calculate the average elasticity longitudinal wave velocity of described face country rock.
4. the dynamic refinement stage division of the tunnel excavation country rock based on comprehensive parameters according to claim 1, it is characterized in that, described monitoring measurement data comprise tunnel vault sedimentation value, perimeter convergence value, pressure from surrounding rock value, reinforcement stresses value and just prop up crack and have or not etc.
5. the dynamic refinement hierarchy system of the tunnel excavation country rock based on comprehensive parameters, is characterized in that: comprise forecast system, monitoring and acquisition system, measuring system and computing machine;
Described forecast system is USEP21 underground engineering construction advanced geology prediction system, for face country rock being carried out to the detection of comprehensive parameters advance geologic prediction, and according to the fender graded of the forecast detection data correction face obtaining;
Described forecast system comprises USP underground engineering construction Preceding geology predictor and UEP underground engineering construction Preceding geology predictor; Described USP underground engineering construction Preceding geology predictor, for by utilizing seismic event that described face country rock is grown apart from comprehensive parameters advance geologic prediction and surveyed, the matter over long distances of acquisition forecast detection data; Described UEP underground engineering construction Preceding geology predictor, for surveying by utilizing electromagnetic wave to carry out short distance comprehensive parameters advance geologic prediction to described face country rock, obtains short distance geologic prediction detection data; Described length is greater than 100 meters apart from referring to, described short distance refers to and is less than 30 meters;
Described USP underground engineering construction Preceding geology predictor also comprises: initiator, Multi-component earthquake wave space receiving trap, Multichannel synchronized signal collection device; Described initiator is used for causing seismic event; Described Multi-component earthquake wave space receiving trap is for receiving the seismic event being produced by described initiator initiation earthquake; Described Multichannel synchronized signal collection device is for gathering vibrations and the fluctuating signal of the face country rock causing because of seismic event;
Described UEP underground engineering construction Preceding geology predictor also comprises: electromagnetic wave transmitter, electromagnetic wave receiver and Multichannel synchronized signal collection device; Described electromagnetic wave transmitter is used at described face country rock emitting electromagnetic wave; The electromagnetic wave that described electromagnetic wave receiver returns for being received from described face country rock, described Multichannel synchronized signal collection device is the feedback signal from described face country rock for synchronous acquisition;
Described monitoring system comprises spirit-leveling instrument, convergence gauge, pressure cell, reinforcing rib meter and crack observer; Described spirit-leveling instrument is used for measuring tunnel vault sedimentation value; Convergence gauge is used for obtaining perimeter convergence value; Pressure cell is for obtaining the pressure from surrounding rock value being embedded between country rock steel arch frame, and described reinforcing rib meter is for obtaining reinforcement stresses value by measurement, and described crack observer is used for obtaining a just crack value;
Described measuring system comprises face country rock compressional wave receiver and longitudinal elastic wave wave velocity testing instrument, for obtaining the longitudinal elastic wave velocity of wave of described face country rock;
The internal main of described computing machine will comprise data processing module, data memory module and data disaply moudle, and described data disaply moudle is used for connecting display, and the country rock comprehensive parameters that shows face is sentenced and translated result; Described data memory module is used for storing Monitoring Data, collection signal, long and short apart from geologic prediction detection data; Described data processing module is for the treatment of the data of memory stores.
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