CN104198676A - Surrounding rock classifying method suitable for milling and excavating of tunnels - Google Patents
Surrounding rock classifying method suitable for milling and excavating of tunnels Download PDFInfo
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- CN104198676A CN104198676A CN201410414596.XA CN201410414596A CN104198676A CN 104198676 A CN104198676 A CN 104198676A CN 201410414596 A CN201410414596 A CN 201410414596A CN 104198676 A CN104198676 A CN 104198676A
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Abstract
The invention relates to a surrounding rock classifying method suitable for milling and excavating of tunnels. The surrounding rock classifying method comprises the following steps: S1. primarily judging primary classification of the surrounding rocks of the tunnels and marking a primary classification sign according to geological conditions, the excavated stable state and velocity of longitudinal wave of elastic wave of the surrounding rocks for the milling and excavating of tunnels; S2. carrying out secondary classification on the surrounding rocks for the milling and excavating of tunnels and marking a secondary classification sign based on the working efficiency of a milling excavating machine; and S3. obtaining potential risk of milling and excavating the surrounding rocks for the tunnels based on the primary classification and the secondary classification and outputting corresponding technical measures. Compared with the prior art, the method is capable of simply, intuitively and accurately reflecting various conditions when the tunnels are excavated by using a milling and excavating method and also capable of providing basis for reasonable classification of the surrounding rocks for milling and excavating of the tunnels; the protective measures can be further adopted conveniently.
Description
Technical field
The present invention relates to engineering investigation and underground works technical field, especially relate to a kind of fender graded method that milling is holed that is applicable to.
Background technology
Development along with Tunnel Engineering construction, Tunnel Engineering is frequently passed through existing transport structure, buildings, pipeline, goaf etc., the ground settlement that constructing tunnel causes and concussion of blasting problems of too become increasingly conspicuous, and the milling method of digging that the milling digging machine of take is core can solve this difficult problem well.The milling method of digging is to take milling digging machine as core, the non-explosion tunnel excavation method that can coordinate the methods such as other machineries (as quartering hammer, air pressure gun etc.), Static crushing, controlled blasting to carry out tunnel excavation construction, it is applicable to the few disturbance of the requirements such as Xia Chuan highway, village, buildings, pipeline, goaf, existing tunnel and even exempts from the engineering of disturbance.
Milling is dug method construction and is adopted the cutting of milling digging machine, plane to dig Rock And Soil, completely different from the principle of traditional Mining Method tunnel drilling and blasting excavation Rock And Soil, thereby adopts the classification of tunnel surroun ding rock method of traditional mining method construction not just to be suitable for the construction needs that milling is holed.Therefore, the classification of tunnel surroun ding rock under research milling excavation construction condition, is that the needs of method itself are dug in research milling, also contributes to accelerate constructing tunnel speed, improves tunneling technology level.
Milling digging machine is applied to constructing tunnel as non-tunnel boring machine and has certain geological adaptability.Softly mould that shape cohesive soil, saturated silt, sandy soil etc. do not possess self-stable ability and be not possess milling digging machine condition of work because Rock Under Uniaxial Compression pressure resistance excessive (> 60MPa) causes excavating the almost nil geologic condition of efficiency, be not suitable for adopting milling excavation construction.
To possessing the country rock of milling digging machine condition of work, the milling fender graded essence of holing is conclusion and the evaluation of milling excavation construction formation characteristics, and classification object difference just causes its method adopting different.Existing and the existing classification of tunnel surroun ding rock method of most countries belongs to the division methods of stability grade substantially in the world, at present both at home and abroad to milling hole fender graded research also seldom.At home and abroad there is no the comparatively ripe and generally acknowledged fender graded method that milling is holed that is applicable to.Facts have proved, fender graded method based on stability is comparatively applicable in drilling and blasting method tunnel, but drilling and blasting method is to carry out Design of Construction Organization from the angle of balanced production, it is in order to guarantee under the condition of safety in production that method construction is dug in milling, meet to greatest extent main frame and produce high efficiency requirement, that is to say, to milling hole rocvk classification should take into account development end stability and excavation two aspects of efficiency.
Chinese patent CN 102331488A discloses a kind of mine shaft engineering surrounding rock classification factor hierarchy analysis method, for vertical shaft for mine engineering, based on stability of surrounding rock, from fender graded is multifactor, determine key factor and then carry out systematic analysis, do not consider excavation efficiency factor.Therefore be badly in need of a kind of fender graded method that method constructing tunnel is dug in milling that is applicable to, can make up the deficiency of existing fender graded criteria for classification, for the hole Rational Classification of country rock of milling provides easy, applicable foundation.
Summary of the invention
Object of the present invention is exactly that a kind of easy fender graded method that milling is holed that is applicable to is provided in order to overcome the defect that above-mentioned prior art exists, can reflect intuitively, exactly the various conditions that tunnel runs into while adopting milling to dig method driving, can be milling and dig method constructing tunnel reasonable guarantee is provided.
Object of the present invention can be achieved through the following technical solutions:
Be applicable to the fender graded method that milling is holed, comprise the following steps:
Step S1: according to milling hole steady state (SS) and elastic wave velocity of longitudinal wave after the geologic condition, excavation of country rock, tentatively judge the classification of tunnel surrounding one-level, and the symbol of mark one-level classification;
Step S2: based on milling digging machine work efficiency, the milling country rock of holing is carried out to secondary classification, and the symbol of mark secondary classification;
Step S3: based on one-level classification and secondary classification, obtain the milling potential risk of country rock of holing, and export related technical measures.
Described milling digging machine work efficiency is determined jointly by the condition of work of normal speed and secondary speed, described normal speed is the penetrating speed of milling digging machine while tunneling smoothly, it is in the nature speed, described secondary speed is for when milling digging machine runs into secondary event, milling digging machine penetrating speed is with respect to the reduction value of smooth when driving penetrating speed, and it is in the nature velocity contrast.
Whether the condition of work of described secondary speed is characterized by secondary event.
The event of described secondary event for being caused by unfavorable geological condition.
Also comprise step 201: according to the otherness of Rock And Soil physical mechanics, country rock is divided into dissimilar;
Described step S2 is according to the milling digging machine work efficiency that in step 201, dissimilar country rock is corresponding, and the milling country rock of holing is carried out to secondary classification, and the symbol of mark secondary classification.
Described dissimilar country rock comprises middle hard rock, soft rock, clayey country rock and non-clay matter country rock.
The milling digging machine work efficiency of described middle hard rock determines by the condition of work of normal speed, by the uniaxial compressive strength R of rock
c, rock wearing quality A
b, rock mass integrality K
vcharacterize.
The milling digging machine work efficiency of described soft rock determines jointly by the condition of work of normal speed and secondary speed, and the condition of work of its normal speed is by uniaxial compressive strength R
c, rock mass integrality K
vcharacterize.
The milling digging machine work efficiency of described clayey country rock is determined jointly by the condition of work of normal speed and secondary speed.
The milling digging machine work efficiency of described non-clay matter country rock is determined jointly by the condition of work of normal speed and secondary speed.
Compared with prior art, the present invention holes and has true, comprehensive feature aspect fender graded in milling, can be milling and digs that method constructing tunnel provides accurately, rational method guarantee, has the following advantages:
1) sorting technique of the present invention is for the milling country rock of holing, at present both at home and abroad to milling hole fender graded research also seldom, not yet have the comparatively ripe and generally acknowledged fender graded method that milling is holed that is applicable to, this sorting technique has been filled up the blank of rock-soil classification standard;
2) sorting technique of the present invention is by taking into account development end stability and excavation efficiency, can more reasonably evaluate the milling construction country rock grade of holing, condition of work by normal speed and secondary speed determines jointly, normal speed is the penetrating speed of milling digging machine while tunneling smoothly, secondary speed is for when milling digging machine runs into secondary event, the reduction value of milling digging machine penetrating speed penetrating speed during with respect to smooth driving;
3) sorting technique of the present invention has contained various conditions and the situation running into when method driving is dug in milling, because milling is holed there is the corresponding feature that is different from general tunnel in country rock, the situation of the different surrounding rock type of holing according to milling, be divided into middle hard rock, soft rock, clayey country rock and non-clay matter country rock, carry out the judgement of country rock secondary classification;
4) event that in sorting technique of the present invention, secondary event causes for dug the unfavorable geological conditions such as drum knot mud ball and pick eccentric wear by milling has been considered poorly qualitative factor of country rock in assorting process;
5) sorting technique of the present invention is for the geologic feature of middle hard rock, by the uniaxial compressive strength R of rock
c, rock wearing quality A
b, rock mass integrality K
vetc. index, be used for carrying out country rock secondary classification, be convenient to the follow-up construction geologic feature of this class surrounding rock of centering hard rock targetedly, carry out corresponding safeguard procedures;
6) sorting technique of the present invention is for the geologic feature of soft rock, by uniaxial compressive strength R
c, rock mass integrality K
v, the index such as unfavorable geology and secondary speed or event be as the foundation of secondary classification, is convenient to the follow-up construction geologic feature to this class surrounding rock of soft rock targetedly, carries out corresponding safeguard procedures;
7) sorting technique of the present invention is for the geologic feature of clayey country rock, its normal speed is comparatively desirable, whether secondary speed is occurred to characterize by abnormal conditions such as tying mud ball and pick eccentric wear, the common foundation as secondary classification, be convenient to the follow-up construction geologic feature to this class surrounding rock of clayey country rock targetedly, carry out corresponding safeguard procedures;
8) sorting technique of the present invention is for the geologic feature of non-clay matter country rock, its work efficiency is weighed by its digging property quality, normal speed is comparatively desirable, whether secondary speed is characterized by the generation of pick eccentric wear, be convenient to the follow-up construction geologic feature to this class surrounding rock of non-clay matter country rock targetedly, carry out corresponding safeguard procedures.
Accompanying drawing explanation
Fig. 1 is fender graded method flow diagram in the embodiment of the present invention one;
Fig. 2 is fender graded method flow diagram in the embodiment of the present invention two.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment be take technical solution of the present invention and is implemented as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment mono-:
As shown in Figure 1, be a kind ofly applicable to the fender graded method that milling is holed, comprise the following steps:
Step S1: according to actual milling hole steady state (SS) and elastic wave velocity of longitudinal wave after the geologic condition, excavation of country rock, tentatively judge the classification of tunnel surrounding one-level, and the symbol of mark one-level classification;
Milling is holed the one-level classification of country rock from construction stability angle, use for reference in < < Design of Railway Tunnel standard (TB 10003-2005) > > " surrounding rockmass classification of railway tunnel table ", the milling country rock of holing is divided into III～V level country rock by the index in " surrounding rockmass classification of railway tunnel table " and boundary, refers to table 1;
The table 1 milling country rock one-level classification of holing
Step S2: based on milling digging machine work efficiency, the milling country rock of holing is carried out to secondary classification, and the symbol of mark secondary classification;
Milling digging machine work efficiency is determined jointly by the condition of work of normal speed and secondary speed, normal speed is the penetrating speed of milling digging machine while tunneling smoothly, it is in the nature speed, secondary speed is for when milling digging machine runs into secondary event, milling digging machine penetrating speed is with respect to the reduction value of smooth when driving penetrating speed, and it is in the nature velocity contrast.
Whether the condition of work of secondary speed is characterized by secondary event.
The event that secondary event causes for dug the unfavorable geological conditions such as drum knot mud ball and pick eccentric wear by milling.
Secondary classification is that dissimilar country rock is divided into good operation conditions (A), condition of work general (B), works under hard conditions (C) and condition of work extreme difference maybe should not adopt four substates of milling excavation construction (D), from normal speed angle, milling being holed, country rock condition of work is divided into efficiently, general, poor efficiency Three Estate, from secondary speed angle, the milling country rock condition of work of holing is made trouble to whether part occurs to be divided into efficiently, two grades of poor efficiency in due order, if there is secondary event, it is poor efficiency, if there is not secondary event for efficient, concrete classification foundation is in Table 2.
The table 2 milling country rock secondary classification of holing
Step S3: based on one-level classification and secondary classification, obtain the milling potential risk of country rock of holing, and export related technical measures.
Embodiment bis-:
As shown in Figure 2, the present embodiment two is also to comprise step 201 with embodiment mono-difference: according to the otherness of Rock And Soil physical mechanics, country rock is divided into dissimilar; Step S2 is according to the milling digging machine work efficiency that in step 201, dissimilar country rock is corresponding, and the milling country rock of holing is carried out to secondary classification, and the symbol of mark secondary classification.
Dissimilar country rock comprises middle hard rock (30MPa < Rc < 60MPa), soft rock (1.5MPa < Rc < 30MPa), clayey country rock and non-clay matter country rock.
For middle hard rock, its geologic condition has determined that above-mentioned secondary event can not occur for it, thus middle hard rock milling digging machine work efficiency by the condition of work of normal speed, determined, be subject to the uniaxial compressive strength R of rock
c, rock wearing quality A
b, rock mass integrality K
vdeng impact, comprehensive above-mentioned three kinds of influence factors, middle hard rock milling is dug condition of work classification in Table 3:
In table 3, condition of work classification is dug in hard rock milling
The milling digging machine work efficiency of soft rock determines jointly by the condition of work of normal speed and secondary speed, and the condition of work of its normal speed is by uniaxial compressive strength R
c, rock mass integrality K
vcharacterize, and be subject to the impact of unfavorable geology etc., consider above-mentioned three kinds of influence factors, soft rock milling is dug condition of work classification in Table 4:
Condition of work classification is dug in the milling of table 4 soft rock
The milling digging machine work efficiency of clayey country rock is determined jointly by the condition of work of normal speed and secondary speed, the condition of work of its normal speed belongs to efficient grade, without again the condition of work of its normal speed being carried out to classification, whether secondary speed operation condition is characterized by the generation of tying the situations such as mud ball and pick eccentric wear, specifically classifies in Table 5:
Condition of work classification is dug in the milling of table 5 clayey country rock
The milling digging machine work efficiency of non-clay matter country rock is determined jointly by the condition of work of normal speed and secondary speed, work efficiency is embodied in the digging property of the soil body, the condition of work of its normal speed belongs to efficient grade, without again the condition of work of its normal speed being carried out to classification, whether secondary speed operation condition is characterized by the generation of pick eccentric wear situation, refers to table 6:
Condition of work classification is dug in the milling of table 6 non-clay matter country rock
Take tunnel, tower Korea Spro railway Zhao Jia gulf, Ba Zhun railway king family's beam tunnel and tunnel, Fu Jia mountain is example, illustrates that the applicable cases of this stage division is as shown in table 7:
The table 7 milling fender graded method application example of holing
Claims (10)
1. be applicable to the fender graded method that milling is holed, it is characterized in that, comprise the following steps:
Step S1: according to milling hole steady state (SS) and elastic wave velocity of longitudinal wave after the geologic condition, excavation of country rock, tentatively judge the classification of tunnel surrounding one-level, and the symbol of mark one-level classification;
Step S2: based on milling digging machine work efficiency, the milling country rock of holing is carried out to secondary classification, and the symbol of mark secondary classification;
Step S3: based on one-level classification and secondary classification, obtain the milling potential risk of country rock of holing, and export related technical measures.
2. a kind of fender graded method that milling is holed that is applicable to according to claim 1, it is characterized in that, described milling digging machine work efficiency is determined jointly by the condition of work of normal speed and secondary speed, described normal speed is the penetrating speed of milling digging machine while tunneling smoothly, it is in the nature speed, described secondary speed is for when milling digging machine runs into secondary event, the reduction value of milling digging machine penetrating speed penetrating speed during with respect to smooth driving, and it is in the nature velocity contrast.
3. a kind of fender graded method that milling is holed that is applicable to according to claim 2, is characterized in that, whether the condition of work of described secondary speed is characterized by secondary event.
4. a kind of fender graded method that milling is holed that is applicable to according to claim 2, is characterized in that, the event of described secondary event for being caused by unfavorable geological condition.
5. a kind of fender graded method that milling is holed that is applicable to according to claim 2, is characterized in that, also comprises step 201: according to the otherness of Rock And Soil physical mechanics, country rock is divided into dissimilar;
Described step S2 is according to the milling digging machine work efficiency that in step 201, dissimilar country rock is corresponding, and the milling country rock of holing is carried out to secondary classification, and the symbol of mark secondary classification.
6. a kind of fender graded method that milling is holed that is applicable to according to claim 5, is characterized in that, described dissimilar country rock comprises middle hard rock, soft rock, clayey country rock and non-clay matter country rock.
7. a kind of fender graded method that milling is holed that is applicable to according to claim 6, is characterized in that, the milling digging machine work efficiency of described middle hard rock determines by the condition of work of normal speed, by the uniaxial compressive strength R of rock
c, rock wearing quality A
b, rock mass integrality K
vcharacterize.
8. a kind of fender graded method that milling is holed that is applicable to according to claim 6, it is characterized in that, the milling digging machine work efficiency of described soft rock determines jointly by the condition of work of normal speed and secondary speed, and the condition of work of its normal speed is by uniaxial compressive strength R
c, rock mass integrality K
vcharacterize.
9. a kind of fender graded method that milling is holed that is applicable to according to claim 6, is characterized in that, the milling digging machine work efficiency of described clayey country rock is determined jointly by the condition of work of normal speed and secondary speed.
10. a kind of fender graded method that milling is holed that is applicable to according to claim 6, is characterized in that, the milling digging machine work efficiency of described non-clay matter country rock is determined jointly by the condition of work of normal speed and secondary speed.
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| CN109765097B (en) * | 2018-12-21 | 2021-07-02 | 中铁三局集团有限公司 | Tunnel surrounding rock rapid classification method based on RPD drilling machine |
| CN109781960A (en) * | 2019-01-10 | 2019-05-21 | 中国电建集团西北勘测设计研究院有限公司 | A kind of deep covering layer ground quality engineering geology stage division |
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| CN110080792A (en) * | 2019-05-22 | 2019-08-02 | 中国电建集团西北勘测设计研究院有限公司 | A kind of tunnel excavation method based on miniature TBM equipment |
| CN114926101A (en) * | 2022-07-18 | 2022-08-19 | 石家庄铁道大学 | Construction speed and safety-oriented TBM (Tunnel boring machine) adaptive surrounding rock grading method |
| CN114926101B (en) * | 2022-07-18 | 2022-10-28 | 石家庄铁道大学 | Construction speed and safety-oriented TBM (Tunnel boring machine) adaptive surrounding rock grading method |
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