CN102913249B - Inclined shaft transverse-through positive hole single horn lifting construction method - Google Patents
Inclined shaft transverse-through positive hole single horn lifting construction method Download PDFInfo
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- CN102913249B CN102913249B CN201210423152.3A CN201210423152A CN102913249B CN 102913249 B CN102913249 B CN 102913249B CN 201210423152 A CN201210423152 A CN 201210423152A CN 102913249 B CN102913249 B CN 102913249B
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Abstract
The invention provides an inclined shaft transverse-through positive hole single horn lifting construction method which comprises the following steps that: S1, an inclined shaft (1) transversely penetrates through positive holes (2); S2, a single horn-shaped small guide hole (3) is lifted; and S3, after the positive holes (2) on the two sides of the inclined shaft (1) are penetrated, an intersection (6) between the inclined shaft (1) and the positive holes (2) is back expanded, the inclined shaft (1) outside the positive holes (2) is sealed, and meanwhile, the two sides of each positive holes (2) are subjected to preliminary supporting construction. The inclined shaft transverse-through positive hole single horn lifting construction method solves part of construction difficulty existing in a traditional construction method when the inclined shaft enters the positive holes for lifting in the construction of an extremely-soft rock, rich water saturated silt and fine sand, flow plastic soil, silt soil and other grade-VI surrounding rock tunnels, and overcomes the problems of large construction difficulty, slow construction progress, high safety risk and the like existing in the traditional construction method.
Description
Technical field
The present invention relates to constructing tunnel field, relate in particular to a kind of special geology tunnel inclined shaft and enter the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating that Zheng Dong chooses high construction and choose high construction method.
Background technology
In construction of tunnel, long tunnel is the long tunnel hand-to-hand fight in tights of many employings of reduction of erection time, therefore in long tunnel construction, all exist inclined shaft to enter Zheng Dong and choose high section construction, also be faced with under unfavorable geology and special geologic condition and choose the difficult problem of high construction, for example, under the geological conditions of the VI level country rocks such as dead-soft rock, rich water saturation powder packsand, the stream plasticity soil body, silt soil, choose high construction simultaneously.
Along with the accumulation of the long-term tunnel construction experience of China, enter Zheng Dong for the inclined shaft under unfavorable geological condition and choose high-tech and conventionally adopt three kinds of methods: the one, the inclined shaft positive hole vault of directly climbing, then carries out partial excavation to positive hole both direction; The 2nd, the little pilot tunnel Zheng Dong arch of climbing, then to positive hole two direction benching tunnelling methods excavations; The 3rd, inclined shaft is turned and is entered Zheng Dong, then returns and digs.First method operation is loaded down with trivial details, and step excavation successively need set up interim inverted arch to the segment structure classification of climbing, and temporary lining amount is large; Second method adopts little pilot tunnel to align arch, hole and excavates, and then enters the construction of positive hole, and only little pilot tunnel part is temporary lining, and temporary lining amount is less relatively; The third method operation is more loaded down with trivial details, the anti-stage arch constructional difficulties of choosing, and temporary lining amount is large; And above three kinds of methods all exist the stress system transfer problem in work progress, and in work progress, security risk is higher.
Above three kinds of construction technologies are used widely in as Beijing Metro, Zheng Xi Line for Passenger Transportation and other railway tunnel at general unfavorable geology, obtain good effect, but enter in the construction of positive hole to exist the problems such as difficulty of construction is large, construction speed is slow, security risk is high for special unfavorable geology tunnel inclined shaft, as entering Zheng Dong, rich water saturation powder packsand stratum, tunnel, flax ridge inclined shaft chooses high construction, adopt traditional inclined shaft to enter Zheng Dong and choose high construction technology and cannot complete, therefore construction technology needs improvement and bring new ideas.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is to provide a kind of special geology tunnel inclined shaft that adapts to enters Zheng Dong and chooses the single loudspeaker in the positive hole of high inclined shaft lateral direction penetrating and choose high construction method, has solved that conventional construction method is large in the difficulty of construction of special formation key position, construction speed slow, the conversion of structure stress system brings the problems such as security risk in construction.
(2) technical scheme
For reaching above-mentioned purpose, the invention provides the single loudspeaker in the positive hole of a kind of inclined shaft lateral direction penetrating and choose high construction method, comprise the following steps:
S1, the inclined shaft 1 positive hole 2 of lateral direction penetrating;
S2, single tubaeform little pilot tunnel 3 are chosen high construction:
Choose high construction at the interior tubaeform little pilot tunnel of list that first carries out inclined shaft 1 one sides in positive hole 2, the more tubaeform little pilot tunnel of list that carries out inclined shaft 1 opposite side is chosen high construction;
After the positive hole 2 of S3, inclined shaft 1 both sides connects, go back to the intersection 6 in expansion inclined shaft 1 and positive hole 2 and shut the inclined shaft 1 outside positive hole 2, aligning 2 both sides, hole simultaneously and perform preliminary bracing.
Wherein, step S1 specifically comprises:
S101, excavation inclined shaft 1, make the first side profile 4 lateral direction penetrating positive holes 2 of inclined shaft 1 from positive hole 2, and inclined shaft 1 is positioned at the middle and lower part in positive hole 2;
S102, in the time that the face of inclined shaft (1) and the second side profile (5) of Zheng Dong (2) overlap, stop excavating inclined shaft (1), the face of sealing inclined shaft (1).
Wherein, step S2 specifically comprises:
S201, in positive hole 2, excavate little pilot tunnel 3 from a side of inclined shaft 1, little pilot tunnel 3 one sides overlap with second side profile 5 in positive hole 2, the opposite side of little pilot tunnel 3 expands gradually, make 3 one-tenth of little pilot tunnels single tubaeform, and little pilot tunnel 3 vaults are constant to the height of little pilot tunnel 3 bottoms, little pilot tunnel 3 is chosen gradually height with certain slope in positive hole 2, when the expansion side of little pilot tunnel 3 and first side profile 4 in positive hole 2 approach or when the vault of little pilot tunnel 3 is approaching with the vault profile in positive hole 2, the vault of little pilot tunnel 3 digged to the vault profile to positive hole 2;
S202, by the construction method in positive hole 2, the face of little pilot tunnel 3 is digged to consistent with the lateral contour in positive hole 2, and little pilot tunnel 3 is performed to temporary lining simultaneously, little pilot tunnel 3 is got out of a predicament or an embarrassing situation and shop fixtures construction in performing and little pilot tunnel 3 being carried out after temporary lining;
S203, by the construction method in positive hole 2, positive hole 2 is excavated to and forms standard construction step pitch, excavate inverted arch, filling and two linings that positive hole 2 performs positive hole 2 simultaneously;
S204, repeating step S201 to S203, carry out the tubaeform little pilot tunnel 3 of list of inclined shaft opposite side and choose high construction.
Preferably, in step S 102, adopt concreting to seal the face of inclined shaft 1, reserve little pilot tunnel 3 positions simultaneously and perform inclined shaft two and serve as a contrast 8.
Preferably, the construction method in described positive hole 2 is CRD method.
Preferably, described standard construction step pitch is 3-5 rice.
(3) beneficial effect
The single loudspeaker in the positive hole of inclined shaft lateral direction penetrating that the present invention adopts technique scheme to provide are chosen high construction method, solve conventional construction method inclined shaft in the VI level surrounding rock tunnel constructions such as dead-soft rock, rich water saturation powder packsand, the stream plasticity soil body, silt soil and entered Zheng Dong and choose the high part construction difficult problem existing, overcome the problems such as the difficulty of construction existing in the middle of conventional construction method is large, construction speed is slow, security risk is high.After adopting positive hole to connect, return and expand intersection and choose the method for high section and evaded the stress system conversion in work progress, ensured construction safety.Construction method of the present invention is rational in infrastructure, safe and reliable, and efficiency of construction is high, has obvious economic benefit.
Brief description of the drawings
Fig. 1 is that the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating of the present invention are chosen the top view in the positive hole of inclined shaft lateral direction penetrating of high construction method;
Fig. 2 is that the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating of the present invention are chosen the front view in the positive hole of inclined shaft lateral direction penetrating of high construction method;
Fig. 3 is that the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating of the present invention are chosen the right view in the positive hole of inclined shaft lateral direction penetrating of high construction method.
In figure, 1: inclined shaft; 2: positive hole; 3: little pilot tunnel; 4: the first side profile; 5: the second side profile; 6: intersection; 7: inclined shaft preliminary bracing; 8: inclined shaft two serves as a contrast; 9: termination wall; A: Chongqing end; B: Lanzhou end.
Detailed description of the invention
Below in conjunction with drawings and Examples, the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating of the present invention being chosen to high construction method is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
In description of the invention, it should be noted that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of instructions such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " be only for describing object, and can not be interpreted as instruction or hint relative importance.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
In addition,, in description of the invention, except as otherwise noted, the implication of " multiple " is two or more.
As shown in Figure 1 to Figure 3, the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating of the present invention are chosen high construction method and are comprised the following steps:
S1, the inclined shaft 1 positive hole 2 of lateral direction penetrating:
S101, excavation inclined shaft 1, make the first side profile 4 lateral direction penetrating positive holes 2 of inclined shaft 1 from positive hole 2, and inclined shaft 1 is positioned at the middle and lower part in positive hole 2;
S102, in the time that the face of inclined shaft 1 overlaps with second side profile 5 in positive hole 2, stop excavating inclined shaft 1, the face of sealing inclined shaft 1;
S2, single tubaeform little pilot tunnel 3 are chosen high construction:
S201, in positive hole 2, excavate little pilot tunnel 3 from a side of inclined shaft 1, little pilot tunnel 3 one sides overlap with second side profile 5 in positive hole 2, the opposite side of little pilot tunnel 3 expands gradually, make 3 one-tenth of little pilot tunnels single tubaeform, and little pilot tunnel 3 vaults are constant to the height of little pilot tunnel 3 bottoms, little pilot tunnel 3 is chosen gradually height with certain slope in positive hole 2, when the expansion side of little pilot tunnel 3 and first side profile 4 in positive hole 2 approach or when the vault of little pilot tunnel 3 is approaching with the vault profile in positive hole 2, the vault of little pilot tunnel 3 digged to the vault profile to positive hole 2;
S202, by the construction method in positive hole 2, the face of little pilot tunnel 3 is digged to consistent with the lateral contour in positive hole 2, and little pilot tunnel 3 is performed to temporary lining simultaneously, little pilot tunnel 3 is got out of a predicament or an embarrassing situation and shop fixtures construction in performing and little pilot tunnel 3 being carried out after temporary lining;
S203, by the construction method in positive hole 2, positive hole 2 is excavated to and forms standard construction step pitch, excavate inverted arch, filling and two linings that positive hole 2 performs positive hole 2 simultaneously;
S204, repeating step S201 to S203, carry out the tubaeform little pilot tunnel 3 of list of inclined shaft opposite side and choose high construction;
After the positive hole 2 of S3, inclined shaft 1 both sides connects, go back to the intersection 6 in expansion inclined shaft 1 and positive hole 2 and shut the inclined shaft 1 outside positive hole 2, aligning 2 both sides, hole simultaneously and perform preliminary bracing.
Preferably, in S102, adopt concreting to seal the face of inclined shaft 1, reserve little pilot tunnel 3 positions simultaneously and perform inclined shaft two and serve as a contrast 8.
Preferably, the construction method in described positive hole 2 is CRD method.
Preferably, described standard construction step pitch is 3-5 rice.
As example, the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating of the present invention being chosen to high construction method taking Lan Yu Railway LYS-1 mark flax ridge constructing tunnel below describes.Lan Yu Railway LYS-1 mark tunnel, flax ridge 4# inclined shaft design total length 664m, design grade 8.4%, inclined shaft is crossing with positive 48.6 °, hole.Inclined shaft is excavated to X2+82 place, starts to occur percolating water, and geology is rich pigment packsand, follows the continuous sedimentation of preliminary bracing, and construction speed is slow, and maximum settlement value reaches 114cm, and tradition is chosen high scheme and cannot under this geological conditions, be implemented.For guarantee intersection enter hole safely, improve the three-dimensional stress in intersection, inclined shaft is in advance with the transition of circular curve form, final inclined shaft is spent intersect with large-angle with positive hole 73.1, adopts the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating to choose high construction technology after adjusting.
Lan Yu Railway LYS-1 mark tunnel, flax ridge 4# inclined shaft adopts the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating to choose high construction technology, comprises the following steps:
The first step: the inclined shaft 1 positive hole 2 of lateral direction penetrating:
(1) excavate the positive hole 2 of the direct lateral direction penetrating of inclined shaft 1, and exceed 5 eight ten centimetres of second side profile in positive hole 2, within inclined shaft 1 exceeds the scope of 5 eight ten centimetres of the second side profile, concreting termination wall 9 seals the face of inclined shaft 1.
(2) a side wall of inclined shaft 1 reserves the inclined shaft two of constructing behind the position of single tubaeform little pilot tunnel 3 and serves as a contrast 8.
Second step: single tubaeform little pilot tunnel 3 is chosen high construction:
(1) excavate the tubaeform little pilot tunnel 3 of Chongqing end list, it is that 4.5m is constant that the medium and small pilot tunnel 3 of digging process keeps the height from vault to bottom, climb gradually, and the left side of little pilot tunnel 3 expands gradually with the gradient 22.4%, and second side profile 5 in Yu Zheng hole, right side 2 overlaps.Excavate after about 25m, the profile of little pilot tunnel 3 is basically identical with the profile in positive hole 2, then once digs to the lateral contour in positive hole 2 by CRD method.
(2) after little pilot tunnel 3 digs, by the CRD method construction in positive hole 2, the face of little pilot tunnel 3 becomes the face in positive hole 2, and the interior follow-up simultaneously of little pilot tunnel 3 performs temporary lining, and according to code requirement carry out little pilot tunnel 3 in get out of a predicament or an embarrassing situation and shop fixtures construction.
(3) press after CRD method construction 5m in positive hole 2, and the construction in little pilot tunnel 3 is simultaneously complete, continues to perform inverted arch, filling, two linings in positive hole 2, and so far the high workload of choosing of Chongqing end completes.
(4) same method performs the tubaeform little pilot tunnel of Lanzhou end list.
The 3rd step: after the positive hole 2 of inclined shaft 1 both sides connects, go back to the intersection 6 in expansion inclined shaft 1 and positive hole 2 and shut the inclined shaft 1 outside positive hole 2, aligning 2 both sides, hole simultaneously and perform preliminary bracing.The preliminary bracing in positive hole 2 adopts the concreting wall of shutting inclined shaft 1 as bottomed in the first side profile 4 one sides, and the part preliminary bracing that adopts the termination wall 9 of inclined shaft 1 and choose higher primary school's pilot tunnel 3 in the second side profile 5 one sides is as bottomed.
Monitoring measurement analysis shows: in work progress country rock convergence and vault sedimentation relatively change less, 10 days country rock convergence accumulative total 20mm, and 10 days vaults accumulative total 35mm that sinks, after 10 days, deformation tendency obviously slows down, country rock progresses into stable state; Choose in the process of higher primary school's pilot tunnel 3 in strict accordance with the requirement of specification step pitch at excavation, surrouding rock deformation is all less than 3mm.Show to adopt the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating to choose high construction method in special unfavorable geology constructing tunnel by monitoring measurement data, obvious to deformation controlling for rock surrounding gateways effect of settling, ensure construction safety.
Above embodiment is only for illustrating the present invention, and be not limitation of the present invention, the those of ordinary skill in relevant technologies field, without departing from the spirit and scope of the present invention, can also make a variety of changes and modification, therefore all technical schemes that are equal to also belong to category of the present invention.
Claims (5)
1. the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating are chosen a high construction method, it is characterized in that, comprise the following steps:
S1, the positive hole of inclined shaft (1) lateral direction penetrating (2);
S2, single tubaeform little pilot tunnel (3) are chosen high construction:
The tubaeform little pilot tunnel of list that first carries out inclined shaft (1) one side in Zheng Dong (2) is chosen high construction, the more tubaeform little pilot tunnel of list that carries out inclined shaft (1) opposite side is chosen high construction:
S201, in Zheng Dong (2), excavate little pilot tunnel (3) from a side of inclined shaft (1), little pilot tunnel (3) one sides overlap with the second side profile (5) of Zheng Dong (2), the opposite side of little pilot tunnel (3) expands gradually, make little pilot tunnel (3) become single tubaeform, and little pilot tunnel (3) vault is constant to the height of little pilot tunnel (3) bottom, little pilot tunnel (3) is chosen gradually height with certain slope in Zheng Dong (2), when the expansion side of little pilot tunnel (3) and the first side profile (4) of Zheng Dong (2) approach or when the vault of little pilot tunnel (3) and the vault profile of Zheng Dong (2) approach, the vault of little pilot tunnel (3) is digged to the vault profile of positive hole (2),
S202, by the construction method of positive hole (2), the face of little pilot tunnel (3) is digged to consistent with the lateral contour of positive hole (2), and little pilot tunnel (3) being performed to temporary lining simultaneously, little pilot tunnel (3) is got out of a predicament or an embarrassing situation and shop fixtures construction in performing and little pilot tunnel (3) being carried out after temporary lining;
S203, by the construction method of positive hole (2), positive hole (2) are excavated to and form standard construction step pitch, excavate inverted arch, filling and two linings that positive hole (2) performs positive hole (2) simultaneously;
S204, repeating step S201 to S203, carry out the tubaeform little pilot tunnel of list (3) of inclined shaft opposite side and choose high construction;
After the positive hole (2) of S3, inclined shaft (1) both sides connects, go back to the intersection (6) in expansion inclined shaft (1) and positive hole (2) and shut the outer inclined shaft (1) in positive hole (2), aligning both sides, hole (2) simultaneously and perform preliminary bracing.
2. the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating according to claim 1 are chosen high construction method, it is characterized in that, step S1 specifically comprises:
S101, excavation inclined shaft (1), make first side profile (4) the lateral direction penetrating positive hole (2) of inclined shaft (1) from Zheng Dong (2), and inclined shaft (1) is positioned at the middle and lower part of positive hole (2);
S102, in the time that the face of inclined shaft (1) and the second side profile (5) of Zheng Dong (2) overlap, stop excavating inclined shaft (1), the face of sealing inclined shaft (1).
3. the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating according to claim 2 are chosen high construction method, it is characterized in that, adopt concreting to seal the face of inclined shaft (1) in step S102, reserve little pilot tunnel (3) position simultaneously and perform inclined shaft two and serve as a contrast (8).
4. the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating according to claim 1 are chosen high construction method, it is characterized in that, the construction method in described positive hole (2) is CRD method.
5. the single loudspeaker in the positive hole of inclined shaft lateral direction penetrating according to claim 4 are chosen high construction method, it is characterized in that, described standard construction step pitch is 3-5 rice.
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| CN201210423152.3A CN102913249B (en) | 2012-10-30 | 2012-10-30 | Inclined shaft transverse-through positive hole single horn lifting construction method |
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| CN201210423152.3A CN102913249B (en) | 2012-10-30 | 2012-10-30 | Inclined shaft transverse-through positive hole single horn lifting construction method |
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| CN102913249B true CN102913249B (en) | 2014-08-27 |
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| CN104329098A (en) * | 2014-08-29 | 2015-02-04 | 中铁十六局集团有限公司 | Weak surrounding rock auxiliary gallery small pilot tunnel crossing main tunnel roof brushing construction method |
| CN104481546B (en) * | 2014-11-25 | 2016-09-28 | 中铁十二局集团有限公司 | A kind of soft rock tunnel inclined shaft enters the construction method of the double curvature arch in positive hole |
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| CN107130969B (en) * | 2017-07-11 | 2019-06-04 | 北京市政建设集团有限责任公司 | A kind of inclined shaft and main hole intersection substep Enlargement excavation method |
| CN109339800A (en) * | 2018-11-29 | 2019-02-15 | 长安大学 | A kind of Rapid Construction of Tunnels method in the connected section of bridge tunnel |
| CN110685698B (en) * | 2019-10-29 | 2021-04-27 | 中铁（贵州）市政工程有限公司 | Climbing reverse construction method for newly building large-section tunnel in existing cavern side direction |
| CN111677517B (en) * | 2020-07-03 | 2022-06-24 | 中铁十八局集团有限公司 | Method for entering tunnel into main tunnel by tunnel auxiliary pilot pit |
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