CN104847367B - Double mode shield machine mode conversion method in long range compound stratum - Google Patents
Double mode shield machine mode conversion method in long range compound stratum Download PDFInfo
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- CN104847367B CN104847367B CN201510248995.8A CN201510248995A CN104847367B CN 104847367 B CN104847367 B CN 104847367B CN 201510248995 A CN201510248995 A CN 201510248995A CN 104847367 B CN104847367 B CN 104847367B
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Abstract
The present invention relates to double mode shield machine construction field, more particularly to a kind of double mode shield machine mode conversion method, step in long range compound stratum are：A, soft rock strata is transferred in ground consisting of hard rock, and shield machine is transformed into hard rock boring mode from earth pressure balance boring mode, and translation bit is set in ground consisting of hard rock close to soft or hard stratum interface；B, ground consisting of hard rock is transferred in soft rock strata, shield machine from hard rock boring mode be transformed into earth pressure balance boring mode when, translation bit is set in ground consisting of hard rock close to soft or hard stratum interface；It is an object of the invention to provide a kind of safer double mode shield machine mode conversion methods in long range compound stratum.
Description
Technical field
The present invention relates to double mode shield machine construction field, more particularly to a kind of double mode shield machine is compound over long distances
Mode conversion method in layer.
Background technology
In recent years, it is widely applied on the Tunnel Project of shield machine at home, in general the species of Suporting structure
It is corresponded with geology, is all monotype shield.In the location driving that shield is alternately present on soft or hard stratum, if also existing therebetween
When soft rock or upper soft lower hard compound stratum and important building, there are mainly two types of the methods taken：One kind is dug using EPB
Into pattern；Another kind is that hard rock section first is used mining method construction, then pushes away segment assembly using shield sky and pass through.Using EPB (soil
Press balance tunneling mode), although soft rock and building can be tackled very well, drivage efficiency is low in hard rock；Using Mining Method,
Not only process is numerous and diverse, of high cost, and due to concussion of blasting, is unfavorable for settlement Control and building protection, in order to solve difference
The situation that geology is alternately present, the convertible shield of double mode are come into being, and are solving the location being alternately present on soft or hard stratum just
Often driving；
In the prior art, double mode shield machine is in use, and translation bit is set to soft, hard formation junction, herein rock stratum wind
Change degree is larger, and under groundwater effect, self-stability is very poor, and pattern conversion construction risk is big, and security can not ensure.
The content of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of the prior art, a kind of safer double mode is provided
Shield machine mode conversion method in long range compound stratum.
In order to realize foregoing invention purpose, the present invention provides following technical schemes：
A kind of double mode shield machine mode conversion method, step in long range compound stratum are：
A, soft rock strata is transferred in ground consisting of hard rock, and shield machine is transformed into hard rock driving mould from earth pressure balance boring mode
Formula, translation bit are set in ground consisting of hard rock close to soft or hard stratum interface；
B, ground consisting of hard rock is transferred in soft rock strata, and shield machine is transformed into earth pressure balance boring mode from hard rock boring mode
When, translation bit is set in ground consisting of hard rock close to soft or hard stratum interface.
Pattern conversion process determines that the transition period must dismount screw conveyor, centre revolving joint, cleaning shoe in native storehouse
Wait the EPB (equipment under earth pressure balance boring mode) ＆TBM (hard rock boring mode) difference boring modes.In the pattern transition period,
It can not realize work with pressure, can only work under normal pressure, therefore when TBM＆EPB patterns mutually turn, it is necessary to ensure that driving face has foot
Enough stability.
Understand under normal circumstances, the optimum position that pattern is converted is as soft, at hard formation interface, and soft, hard formation is handed over
Place is met, rock stratum rate of decay is larger, and under groundwater effect, self-stability is very poor, and pattern conversion construction risk is big, and security can not
It ensures；
And in this method, mode switching locations are selected in hard rock section at soft, hard interface, when making conversion, driving
Face has enough stability, it is ensured that the safety of ground construction of structures when pattern is converted,
As the preferred embodiment of the present invention, in step A, translation bit be set to the soft or hard stratum interface 20 of ground consisting of hard rock middle-range~
At 25m, if mode switching locations enter hard rock, section is more, and after pattern conversion, during this section of rock stratum driving, tool abrasion increases
Add, construction efficiency reduces, and construction cost increases, if boring parameter control is improper, can cause tool damage, increase tool changing into
This；If mode switching locations are too near to soft, hard interface, since stratum is mutated, driving face soil layer is led without self-stability
The conversion of cause pattern can not be completed, and other methods must be taken to extend the construction period to can carry out pattern conversion after solidifying of the working face,
Increase construction cost, and restriction of this preferred method to conversion position, are that data is surveyed in the preceding base area of pattern conversion, are aided with geology thunder
It reaches or other geophysical prospecting technologies is tentatively prejudged；According to the mutation of related boring parameter in work progress, and coordinate advance geologic
Bore finally definite pattern conversion optimum position, i.e., according to " survey report, geological radar ancillary technique just sentence, boring parameter is fed back
Carefully sentence " principle determine the soft or hard interface in stratum, consider abrasion of the EPB tooling setups in hard rock and shut down translative mode
Stability, determine from EPB be transformed into TBM (hard rock boring mode) best transition position be the soft or hard boundary of ground consisting of hard rock middle-range
20~25m of face (10~15m of shield length 9.95m+ safe distances), it is ensured that safety improves drivage efficiency, reduces cost.
As the preferred embodiment of the present invention, in step B, translation bit be set to the soft or hard stratum interface 20 of ground consisting of hard rock middle-range~
At 25m
As the preferred embodiment of the present invention, in the step A, hard rock lower limit length is chosen to be 100~150m, turns from TBM
It is the country rock into stability difference to change to EPB, if translative mode not in time, it is likely that the security incidents such as landslide are faced, so
It is to need to be transformed into EPB from TBM certainly without considering hard rock lower limit length, it must be cost-effective；
And if be transformed into the not timely translative mode of TBM from EPB, be only that tool wear aggravates, construction speed do not increase, no
Economy does not bring security incident, but has a kind of situation, if hard rock length is very short, the cost of pattern conversion can exceed that
Since EPB tunnels the tool wear brought seriously generated economic loss in hard rock, in this case, there is no need to convert
, so here just there are one the restriction of hard rock lower limit length, and 100~150m data of the application are from duration and cost two
A angle analysis, EPB is transformed into the hard rock lower limit length of TBM during the pattern that draws is converted, and more Optimizing construction process improves driving effect
Rate reduces cost.
As the preferred embodiment of the present invention, before the boring mode conversion of shield is carried out, duration and construction cost are first passed through
It is adjusted, is calculated, hard rock lower limit length, then determine whether to carry out the conversion of boring mode, when shield has soft rock strata standard
It is standby into ground consisting of hard rock when, if at this point, converted without boring mode, problem described above can be caused to exist, so needing to drop
Low driving speed, in this way, duration and construction cost can be increased；But in construction, the conversion of shield driving pattern needs in itself
Certain duration and certain construction cost, so, by with converted without boring mode in the case of needed for duration and
Construction cost is compared, it is determined whether needs to carry out the conversion of boring mode, to be optimal arrangement and method for construction.
As the preferred embodiment of the present invention, step C is further included, according to different geological conditions, it is suitable to exchange step A, B
Sequence is combined as various arrangement order, suitable for various rock stratum.
As the preferred embodiment of the present invention, in step A, when shield machine reaches conversion position, entire soil pressure storehouse completely into
After ground consisting of hard rock, shield machine is shut down, and is changed boring mode, is made transfer process safer.
As the preferred embodiment of the present invention, in step B, when shield machine reaches conversion position, shield machine is shut down, and changes driving
Pattern makes transfer process safer.
Compared with prior art, beneficial effects of the present invention：
Make work progress safer.
Description of the drawings：
Fig. 1 is the schematic diagram of the method for the present invention；
Specific embodiment
With reference to embodiment and specific embodiment, the present invention is described in further detail.But this should not be understood
Following embodiment is only limitted to for the scope of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that present invention is realized
The scope of invention.
Embodiment 1
The present embodiment by the supreme pure intercity fast railway Nanjing southern station in Nanjing to Lu Kou airports section engineering TA01 bid sections exemplified by,
Detailed process such as Fig. 1 is：
A, soft rock strata is transferred in ground consisting of hard rock, and shield machine is transformed into hard rock driving mould from earth pressure balance boring mode
Formula, translation bit are set in ground consisting of hard rock close to soft or hard stratum interface；
Geological conditions is transitioned into the country rock stablized from stability difference in other words from soft rock to hard rock transition, then need by
Boring mode is transformed into TBM from EPB,
Determine best transition position, first, start with from geological mapping data, it is assumed that geology interface is specific, that is, is existed
In the case that the soft or hard interface in stratum is to determine, on the basis of geology surveys data in detail, it is aided with geological radar or other physical prospecting skills
Art is refined.
Second, analysis EPB is transformed into the mechanical change of TBM, and from soft to hard, driving speed declines, driving load increase, phase
Torque, thrust for answering etc. need to increase, therefore more significantly change there are one boring parameter meetings, because being related to stability,
Conversion position is selected in hard rock and carries out, i.e., has significant change in boring parameter, so as to be completely in stability preferable for entire cutterhead
Hard rock in, then proceed by pattern conversion process.
Specially：Pattern converts preceding base area and surveys data, is aided with geological radar or other geophysical prospecting technologies are tentatively prejudged；
According to the mutation of related boring parameter in work progress, and advance geologic is coordinated to bore finally definite pattern conversion optimum position, i.e.,
Report is surveyed in base area, geological radar ancillary technique is just sentenced, and boring parameter feedback is carefully sentenced, and determines the soft or hard interface in stratum, and synthesis is examined
Consider the stability of abrasion and shutdown translative mode of the EPB tooling setups in hard rock, determine that being transformed into the optimal of TBM from EPB turns
Transposition is set to the soft or hard 20~25m of interface of ground consisting of hard rock middle-range (wherein shield length 9.95m, 10~15m of safe distance).
B, ground consisting of hard rock is transferred in soft rock strata, and shield machine is transformed into earth pressure balance boring mode from hard rock boring mode
When, translation bit is set in ground consisting of hard rock close to soft or hard stratum interface；
Geological conditions from hard rock to soft rock transition, in other words from stability well be transitioned into stablize difference country rock, then need by
Boring mode is transformed into EPB from TBM,
Unlike above-mentioned " being transformed into TBM from EPB ", it is the country rock into stability difference to be transformed into EPB from TBM, such as
Fruit translative mode not in time, it is likely that face the security incidents such as landslide；And if be transformed into the not timely translative mode of TBM from EPB,
Only it is that tool wear aggravates, construction speed does not increase, uneconomical, does not bring security incident.Therefore, for this point, from
TBM, which is transformed into EPB, to be needed to carry out in advance, i.e., soft or hard interface is not yet reached in hard rock and just completes pattern conversion.
Compare above-mentioned EPB be transformed into TBM determine pattern convert optimum position method, propose base area survey data, be aided with ground
Matter radar or other geophysical prospecting technologies (being surveyed close to the geology benefit of soft, hard interface) carry out refinement and determine soft or hard interface.It constructed
According to the mutation of related boring parameter in journey, and advance geologic is coordinated to bore finally definite pattern conversion optimum position, it is similary comprehensive
Consider the stability of abrasion and shutdown translative mode of the EPB tooling setups in hard rock, select shield machine notch in hard rock middle-range
Position from soft or hard 20~25m of interface as be transformed into from TBM EPB best transition position (wherein shield length 9.95m,
10~15m of safe distance).
Such as Fig. 1, according to different geological conditions, exchange step A, the B order or be combined as various arrangement order, fit
For various rock stratum.
In the step A, hard rock lower limit length is chosen to be 100~150m, is from steady due to being transformed into TBM patterns from EPB
The country rock of qualitative difference is only that tool wear aggravates, in construction speed not if not timely translative mode toward the good transition of stability
It goes, it is uneconomical, do not bring security incident.Therefore, there are a hard rock length how long here to carry out pattern conversion just economy
The problem of：If hard rock length is very short, the cost of pattern conversion can exceed that since EPB tunnels the cutter brought mill in hard rock
Economic loss caused by damage is serious.Based on this consideration, analysis integrated economic benefit determines that EPB turns in the conversion of this engineering mode
Change to the hard rock lower limit length of TBM.
In the present embodiment, it is specially：
(1) from duration angle analysis
By taking micro- weathered rock formation as an example：
If it tunnels using TBM patterns and (needs first to be transformed into TBM from EPB, then EPB is transformed into from TBM)：
Driving speed is based on 8 rings/day, i.e. ν=1.333cm/min；
The pattern conversion duration needs 30 days (twice)；
If (not translative mode) is tunneled using EPB always：
Driving speed is based on 2.5 rings/day, i.e. ν=0.417cm/min；
Non-mode converts the duration.
Lower limit length χ is converted by duration Equivalent Calculation：
Solve χ=130.91m
(2) from cost angle analysis
By taking micro- weathered rock formation as an example：
If it tunnels using TBM patterns and (needs first to be transformed into TBM from EPB, then EPB is transformed into from TBM)：
Convert expenses of labour：600000 (twice)
Foam：Nothing
The electricity charge：1000 yuan/m
Equipment increases：2000 yuan/m
Cutter takes：0.8958 ten thousand yuan/m (changing 0.342 knife by every linear meter(lin.m.) to calculate)
If (not translative mode) is tunneled using EPB always：
Convert expenses of labour：Nothing
Foam：600 yuan/m
The electricity charge：1500 yuan/m
Cutter takes：1.4930 ten thousand yuan (changing 0.57 knife by every linear meter(lin.m.) to calculate)
Pass through expense Equivalent Calculation transition length χ：
+ 0.06 χ of+0.8958+0.15 χ of χ+60=1.4930 χ of+0.2 χ of 0.1 χ
Solve χ=118.30m
Therefore respectively from two angle analysis of duration and cost, EPB is transformed into the hard rock lower limit of TBM during the pattern that draws is converted
Length is respectively 130.91m and 118.30m.
It is comprehensive to suggest that conversion lower limit length takes 100~150m.
After technical solution is implemented, it is determined that the ground that TBM＆EPB dual-mode compound shields machine is alternately present on soft or hard stratum
The optimum position and the lower limit length of driving hard rock length that pattern is converted in section.Ensure that TBM＆EPB dual-mode compound shields exist
The safety of ground construction of structures when pattern is converted, while drivage efficiency of the shield machine in ground consisting of hard rock is also improved, it reduces
Construction cost.
Claims (1)
1. a kind of double mode shield machine mode conversion method, step in long range compound stratum are：
A, soft rock strata is transferred in ground consisting of hard rock, and shield machine is transformed into hard rock boring mode from earth pressure balance boring mode, is turned
Transposition is set in ground consisting of hard rock close to soft or hard stratum interface, and pattern converts preceding base area and surveys data, be aided with geological radar or its
He is tentatively prejudged geophysical prospecting technology, and according to the mutation of related boring parameter in work progress, and it is final that advance geologic is coordinated to bore
Determine that pattern converts optimum position, i.e., report is surveyed in base area, geological radar ancillary technique is just sentenced, and boring parameter feedback is carefully sentenced, really
Determine the soft or hard interface in stratum, consider the stability of abrasion and shutdown translative mode of the tooling setup in hard rock；
B, ground consisting of hard rock is transferred in soft rock strata, shield machine from hard rock boring mode be transformed into earth pressure balance boring mode when,
Translation bit is set in ground consisting of hard rock close to soft or hard stratum interface, and base area surveys data, is aided with geological radar or other physical prospecting skills
Art carries out refinement and determines soft or hard interface, according to the mutation of related boring parameter in work progress, and advance geologic is coordinated to bore most
Definite pattern conversion optimum position eventually equally considers the stabilization of abrasion and shutdown translative mode of the tooling setup in hard rock
Property；
In step A, translation bit is set at 20 ~ 25m of the soft or hard stratum interface of ground consisting of hard rock middle-range, and in step B, translation bit is set to firmly
At 20 ~ 25m of the soft or hard stratum interface of rock stratum middle-range, in the step A, hard rock lower limit length is chosen to be 100 ~ 150m, step A
In, when shield machine reaches conversion position, after entire soil pressure storehouse is completely into ground consisting of hard rock, shield machine is shut down, and changes boring mode,
In step B, when shield machine reaches conversion position, shield machine is shut down, and changes boring mode, according to different geological conditions, is exchanged
Step A, the B order,
Before the boring mode conversion of shield is carried out, first pass through the duration and construction cost is adjusted, calculate limit for length under hard rock
Degree, then determine whether to carry out the conversion of boring mode.
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| CN106761788B (en) * | 2016-12-31 | 2018-08-17 | 中铁二十局集团第五工程有限公司 | A kind of compound stratum Shield Construction Method Used method |
| CN108756918B (en) * | 2018-07-19 | 2024-02-13 | 中国铁建重工集团股份有限公司 | Pipe-free sheet assembling device and shield tunneling machine |
| CN109403994B (en) * | 2018-12-29 | 2021-01-22 | 中国铁建重工集团股份有限公司 | Tunneling construction method for slurry balance shield machine |
| CN112901186B (en) * | 2021-02-23 | 2023-04-11 | 中铁十九局集团轨道交通工程有限公司 | Tunneling equipment and tunneling mode conversion method |
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| CN102410027A (en) * | 2011-10-19 | 2012-04-11 | 中铁隧道装备制造有限公司 | Novel dual-mode TBM (tunnel boring machine) and control method thereof |
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| JP3236580B2 (en) * | 1999-06-08 | 2001-12-10 | 鹿島建設株式会社 | Shield machine, excavation method of shield machine, and construction method of inclined shaft or shaft |
| CN102383805B (en) * | 2011-10-19 | 2013-12-04 | 中铁隧道装备制造有限公司 | Mixed TBM (Tunnel Boring Machine) with multiple-boring mode and tunnel supporting mode |
| CN202560238U (en) * | 2012-03-23 | 2012-11-28 | 北京华隧通掘进装备有限公司 | Soft and hard rock mode conversion heading machine |
| CN102704943A (en) * | 2012-05-30 | 2012-10-03 | 中铁隧道装备制造有限公司 | Shield structure formed by shallow tunneling method in air-pressure mode |
| CN104632236B (en) * | 2014-12-26 | 2017-03-15 | 中铁二局工程有限公司 | Construction method of the double mode shields of TBM EPB in compound stratum |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102410027A (en) * | 2011-10-19 | 2012-04-11 | 中铁隧道装备制造有限公司 | Novel dual-mode TBM (tunnel boring machine) and control method thereof |
Non-Patent Citations (1)
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| 广州地铁三号线客村-大塘盾构区间盾构机掘进技术研究;孙永刚;《中国优秀硕士学位论文全文数据库》;20041215;第37-40页 * |
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