CN108846238A - The real-time indicating means of country rock changing features in TBM tunneling process - Google Patents
The real-time indicating means of country rock changing features in TBM tunneling process Download PDFInfo
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- CN108846238A CN108846238A CN201810706538.2A CN201810706538A CN108846238A CN 108846238 A CN108846238 A CN 108846238A CN 201810706538 A CN201810706538 A CN 201810706538A CN 108846238 A CN108846238 A CN 108846238A
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Abstract
The present invention provides the real-time indicating means of country rock changing features in a kind of TBM tunneling process, and this approach includes the following steps：S1, it defines TBM and digs sex index FPI, and this can dig sex index FPI and can be calculated by the relevant parameter that the data collection system inside TBM acquires in real time, show in TBM operating room display screen；S2, country rock situation and variation tendency are judged according to the size of FPI value.The real-time indicating means of Change in surrounding rocks in TBM tunneling process of the present invention; sex index FPI is dug by definition TBM; and this that can dig sex index FPI can be calculated by the relevant parameter that the data collection system inside TBM acquires in real time; to may make TBM manipulator to judge according only to the size of FPI value country rock situation; guarantee that manipulator can understand the complexity and variation tendency of country rock driving in time; to adjust boring parameter or to carry out which kind of supporting preparation or shutdown inspection in advance, to improve safety and the driving speed of TBM construction.
Description
Technical field
The present invention relates to technical field of tunnel construction, in particular to country rock changing features are real-time in a kind of TBM tunneling process
Indicating means.
Background technique
It, can not be directly to face in TBM tunneling process due to by TBM cutterhead, headstock and the isostructural limitation of shield body
The situation of rock is observed in real time, simultaneously because face generally has the distance of 5m or more to shield body tail portion, if cannot
In time understand face rock conditions, when country rock exposure shield body again go observation hole wall country rock, it is possible that rock crusher or
Tomography landslide fails immediate support, can degenerate also or seriously because of country rock and fail to stop driving in time and TBM is caused to occur
Situations such as card machine, carrys out very big influence to TBM construction progress and safety belt.So far, there are no real-time reflections in the prior art
The indicating means of face country rock situation and variation tendency that TBM is being tunneled.
Summary of the invention
In view of this, the present invention is directed to propose the real-time indicating means of country rock changing features in a kind of TBM tunneling process, so as to
Country rock situation is judged in timely in the construction process, and there is preferable using effect.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
The real-time indicating means of country rock changing features in a kind of TBM tunneling process, this approach includes the following steps：
S1, define TBM dig sex index FPI, and this can dig sex index FPI and can be acquired by the data inside TBM and be
The relevant parameter acquired in real time of uniting is calculated, and shows in TBM operating room display screen；
S2, country rock situation and variation tendency are judged according to the size of FPI value.
Further, in step sl, the sex index FPI that digs is determined by formula (1) and formula (2),
FPI=F/P (1)
F=F0/n (2)
In formula, F is single hobboing cutter average thrust, unit KN on the TBM cutterhead；
P is that the TBM cutterhead is often turned into face country rock depth, unit mm/r；
F0For the TBM cutterhead gross thrust, unit kN；
N is the hobboing cutter number on the TBM cutterhead, and while being manufactured by TBM determines；
The TBM cutterhead gross thrust F0Often being turned into face country rock depth P with the TBM cutterhead can be by the data
Acquisition system collects in real time.
Further, in step s 2, country rock is divided into I grade, II grade, III grade of three grade according to flintiness and integrity degree
Not, the grade the high, shows that country rock is harder, more complete.
Further, in the step S2, the judgment criteria of the country rock situation is：
If FPI value≤λ1, country rock situation is then defined as I grade；
If λ1< FPI value < λ2, country rock situation is then defined as II grade；
If FPI value >=λ2, country rock situation is then defined as III grade；
In formula：λ1And λ2The respectively judgment threshold of state of surrounding rock.
Further, the λ1For 18-22, the λ2=58-62.
Further, the λ1=20, the λ2=60.
Compared with the existing technology, the present invention has the advantage that：
The real-time indicating means of country rock changing features in TBM tunneling process of the present invention, by the pick property for defining TBM
Index FPI, and this that can dig sex index FPI can be calculated by relevant parameter that the data collection system inside TBM acquires in real time
It obtains, is shown in TBM operating room display screen, so that manipulator may make to carry out according only to the size of FPI value to country rock situation
Judgement, guarantee manipulator can understand in time country rock driving complexity and variation tendency, so as to adjust boring parameter or
Which kind of supporting preparation or shutdown inspection are carried out in advance, to improve safety and the driving speed of TBM construction.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is a certain in the real-time indicating means of country rock changing features in TBM tunneling process described in the embodiment of the present invention
FPI value change curve in section tunneling process；
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
The present embodiment is related to the real-time indicating means of country rock changing features in a kind of TBM tunneling process, and this method includes following
Step：
S1, define TBM dig sex index FPI, and this can dig sex index FPI and can be acquired by the data inside TBM and be
The relevant parameter acquired in real time of uniting is calculated, and shows in TBM operating room display screen；S2, it is enclosed according to the judgement of the size of FPI value
Rock situation and variation tendency.
In step sl, the sex index FPI calculation formula of digging is determined by following formula (1) formula (2)：
FPI=F/P (1)
F=F0/n (2)
In formula (1) and formula (2),
F is single hobboing cutter average thrust, unit kN on the TBM cutterhead；
P is that the TBM cutterhead is often turned into face country rock depth, unit mm/r；
F0For the TBM cutterhead gross thrust, unit kN；
N is the hobboing cutter number on the TBM cutterhead, and while being manufactured by TBM determines；
Cutterhead gross thrust F after TBM manufactures and designs, when driving0It can be acquired by the data of control room with pile penetration P value
System recording and displaying.Meanwhile calculation procedure can be placed in the present embodiment in data collection system, it is calculated with that can synchronize
FPI value, and the change curve of FPI value is shown on TBM operating display in time, as shown in Figure 1.By described in the present embodiment
Single hobboing cutter average thrust F value and pile penetration P value are calculated can dig sex index FPI on TBM cutterhead, on the one hand can avoid introducing
Extra computation parameter and bring trouble, and there is preferable using effect after site operation is verified, while also eliminating TBM
The influence factor of cutter diameter size and cutter number, the TBM suitable for any specification.
Country rock in step s 2, can be divided into I grade, II grade, III grade three according to flintiness and integrity degree by the present embodiment
Rank, the grade the high, shows that country rock is harder, more complete.By the way that country rock situation is divided into three ranks in the present embodiment,
On the one hand the frequent grade classification that can avoid manipulator, on the other hand also provide that manipulator's dead-soft or extremely hard country rock occur mentions
Show.
Country rock situation is specifically classified and see the table below：
Country rock situation corresponding to 1 country rock grade of table
| Rank | Country rock situation |
| Ⅰ | Weak broken |
| Ⅱ | Intensity and integrality are moderate |
| Ⅲ | It is hard complete |
According to the classification of country rock situation, the country rock situation judgment criteria in the present embodiment in step S2 is：
If FPI value≤λ1, country rock situation is then defined as I grade；
If λ1< FPI value < λ2, country rock situation is then defined as II grade；
If FPI value >=λ2, country rock situation is then defined as III grade；
In formula：λ1And λ2The respectively judgment threshold of state of surrounding rock, the λ1For 18-22, optimal is 20, the λ2=58-
62, optimal is 60, and λ is used in the present embodiment1And λ2Subregion is carried out to FPI value, and works as λ1When being 20 and λ2It, can shape when being 60
Pairs of FPI value forms reasonable region division, can be on the basis of guaranteeing safety driving, so that FPI value is more as far as possible
It falls into in II grade, convenient for the adjustment of subsequent boring parameter and corresponding support options.
The real-time indicating means of country rock changing features in this TBM tunneling process, it is real-time by the data collection system inside TBM
The relevant parameter of acquisition, which synchronizes, calculates FPI value, and shows FPI change curve in time on TBM operating display, so as to make
Manipulator is obtained by the FPI changing value on TBM display, and compare above-mentioned table 1 to understand the face in tunneling in real time
Country rock situation and variation tendency prompt manipulator to judge wall rock condition in time, are to be easy to tunnel also to be difficult to tunnel, are to become
It is good still to degenerate, to adjust boring parameter or to carry out which kind of supporting preparation or shutdown inspection in advance, to improve TBM construction
Safety and driving speed.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. the real-time indicating means of country rock changing features in a kind of TBM tunneling process, it is characterised in that this approach includes the following steps：
S1, define TBM dig sex index FPI, and this can dig sex index FPI can be real by the data collection system inside TBM
When the relevant parameter that acquires be calculated, the change curve of FPI value is shown in TBM operating room display screen；
S2, country rock situation and variation tendency are judged according to the size of FPI value.
2. the real-time indicating means of country rock changing features in TBM tunneling process according to claim 1, it is characterised in that：
In step sl, the sex index FPI that digs is determined by formula (1) and formula (2),
FPI=F/P (1)
F=F0/n (2)
In formula, F is single hobboing cutter average thrust, unit kN on the TBM cutterhead；
P is that the TBM cutterhead is often turned into face country rock depth, unit mm/r；
F0For the TBM cutterhead gross thrust, unit kN；
N is the hobboing cutter number on the TBM cutterhead, and while being manufactured and designed by TBM determines；
The TBM cutterhead gross thrust F0Often being turned into face country rock depth P with the TBM cutterhead can be acquired by the data
System collects in real time.
3. the real-time indicating means of country rock changing features in TBM tunneling process according to claim 1 or 2, it is characterised in that：
In step s 2, country rock is divided into I grade, II grade, III grade of three rank according to flintiness and integrity degree, the grade the high, shows
Country rock is harder, more complete.
4. the real-time indicating means of country rock changing features in TBM tunneling process according to claim 3, it is characterised in that：Institute
It states in step S2, the judgment criteria of the country rock situation is：
If FPI value≤λ1, country rock situation is then defined as I grade；
If λ1< FPI value < λ2, country rock situation is then defined as II grade；
If FPI value >=λ2, country rock situation is then defined as III grade；
The λ1With the λ2The respectively judgment threshold of state of surrounding rock.
5. the real-time indicating means of country rock changing features in TBM tunneling process according to claim 4, it is characterised in that：Institute
State λ1For 18-22, the λ2=58-62.
6. the real-time indicating means of country rock changing features in TBM tunneling process according to claim 5, it is characterised in that：Institute
State λ1=20, the λ2=60.
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| CN111852486A (en) * | 2020-08-07 | 2020-10-30 | 中国电建集团成都勘测设计研究院有限公司 | Method for comparing TBM tunneling suitability |
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