CN108266209A - A kind of big ledge method in large section subway station excavates the rapid constructing method of lower part - Google Patents
A kind of big ledge method in large section subway station excavates the rapid constructing method of lower part Download PDFInfo
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- CN108266209A CN108266209A CN201711480958.5A CN201711480958A CN108266209A CN 108266209 A CN108266209 A CN 108266209A CN 201711480958 A CN201711480958 A CN 201711480958A CN 108266209 A CN108266209 A CN 108266209A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000010276 construction Methods 0.000 claims abstract description 48
- 238000009412 basement excavation Methods 0.000 claims abstract description 23
- 208000015979 hopping Diseases 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 3
- 239000011435 rock Substances 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 6
- 238000002789 length control Methods 0.000 claims description 2
- 230000011218 segmentation Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses the rapid constructing method that a kind of big ledge method in large section subway station excavates lower part, do after ledge two serves as a contrast, middle and lower part is constructed using the suitable digging formula mode of layer and section, excavation by troughs AT STATION, construct the specific steps are：(1), station is divided into multistage according to station length, and is multilayer by station lower middle portion according to height；(2), the first layer of first segment draws first layer bracket groove, open the first Ma Kou job-hoppings, then the soil at both sides of first layer bracket groove is excavated, it performs preliminary bracing and side wall two serves as a contrast, and erection bracing members are carried out to first layer, other layers under first layer carry out the construction such as first layer, bottomed until digging first segment；(3), such as step (2) carries out remaining section of construction.Present invention segmentation excavation by troughs, multiple work surfaces are constructed simultaneously, accelerate construction speed while construction safety is ensured, while reduce against construction joint is done, waterproof quality preferably ensures at structure construction seam.
Description
Technical field
The present invention relates to underground structrue engineering technical fields, and in particular to a kind of big ledge method in large section subway station is opened
Dig down the rapid constructing method in portion.
Background technology
Contrary sequence method or the construction of PBA engineering methods in the generally use ledge hole of large section tunneling subway station.This two methods is applied
Work safety coefficient is high, and sedimentation and deformation is small, but construction speed is slow, and construction period can not be met in duration anxiety.And substep is opened
It is larger to two lining structures (waterproof, the reinforcing bar, concrete etc.) destruction constructed during digging, quality requirement can not be met, be later stage matter
Measuring defect processing increases difficulty.
Patent application CN201210129678.0, which is disclosed, builds super Shallow Large Span tunneling subway in a kind of rocky stratum
The joist ledge method at station, joist and two lining phase separations in this method, the whole stressed effect of joist is poor in construction work, and
Joist construction is carried out at the same time with excavation supporting operation, and construction interference is larger, and construction quality hardly results in guarantee, therefore this method is simultaneously
Suitable for the construction of large section tunnel.
Invention content
Present invention aims at the rapid constructing method for providing a kind of big ledge method in large section subway station and excavating lower part,
Solve the problems, such as that joist is integrally difficult to ensure that by force difference, construction quality.
The present invention is achieved through the following technical solutions：
A kind of big ledge method in large section subway station excavates the rapid constructing method of lower part, after doing the lining of ledge two, in vehicle
Stand middle and lower part using layer and section, excavation by troughs suitable digging formula mode construct, construct the specific steps are：
(1), station is divided into multistage according to station length, and is multilayer by station lower middle portion according to height；
(2), the first layer of first segment draws first layer bracket groove, opens the first Ma Kou job-hoppings, then excavates the two of first layer bracket groove
The side soil body, performs preliminary bracing and side wall two serves as a contrast, and carries out erection bracing members to first layer, other under first layer
Layer carries out the construction such as first layer, until digging first segment is bottomed, does inverted arch, side wall and middle plate；
(3), such as step (2) carries out the excavation construction of remaining section, does station internal structure after the completion.
Before the lining construction of ledge two is done, ledge excavation is carried out：It is constructed using two side-wall pilot tunnel, first excavates left and right pilot tunnel,
Intercalated nucleus cubsoil part is excavated again.
Height between first layer and the second layer is equal.The setting of layer height can facilitate field operation, ensure construction
Quality.
From top to bottom, the gradient of each layering increases with the increase of depth.
The gradient of first Ma Kou job-hoppings is 45 degree.
When excavating the second layer, the gradient of the second Ma Kou job-hoppings is 60 °.In the present invention, both first layer and the second layer slope
Degree setting can ensure well width in meeting, it is ensured that construction quality is effectively controlled
When excavating undermost bracket groove, the kerve construction undermost bracket groove of section：It is symmetrically set between slot bottom and side wall
It is equipped with grouting rock bolt, the angle of grouting rock bolt and slot bottom is 70 °.
Excavation by troughs section width is unsuitable long for the first time, long to avoid the lining overhanging of ledge two, increases the risk of side wall unstability,
Its length should also meet driving harden structure construction length more than one across (9.12m) simultaneously, and meet related specifications and construct to beam, plate
It stitches the requirement of indwelling and job-hopping Duan Yuwei excavates intersegmental working space requirement；Therefore job-hopping segment length control for the first time is in 18m~24m
It is advisable, residue job-hopping segment length can slightly be grown, and in addition job-hopping section avoids openings position as possible for the first time.
Station big ledge of the invention of first constructing, then station middle and lower part layer and section excavation by troughs, first performs first layer side
Wall two serves as a contrast, to set up bracing members.Re-segmenting excavates remainder, performs excavation segment structure using along the practice, middle plate has performed
Inner support is shaped as, remaining paragraph is finally excavated, performs two lining structures and internal structure.It can ensure entire tunnel in work progress
The globality stressed effect in road, the interference by each step in extraneous and construction is minimum in the construction process, rhythm of constructing
It can ensure construction quality while fast.
To ensure the density of side wall horizontal construction joint concrete, it is close to the pre-buried Full-face pouring pipe of construction joint.Side wall mould
Plate oblique notches in construction joint position, and skewed slot is risen when horizontal construction joint 30cm, casting concrete, and concrete needs superfilled 30cm
Height, in the process vibration compacting.
The present invention is compared with CN201210129678.0, and longeron is set in two linings in the present invention, is served as a contrast together with arch two
It performs, globality stressed effect is good, and construction interference is small, and construction quality is effectively ensured.
Difficult point in the present invention is：1st, the Forming Quality of big ledge arch springing basal plane is controlled；2nd, middle and lower part side wall excavates
When, it is necessary to out break is controlled, reduces country rock disturbance, ensures the integrality of country rock as possible；And it is exactly based on the construction of the present invention
Way：The first construction big ledge in station, then station middle and lower part layer and section excavation by troughs, first performs first layer side wall two and serves as a contrast, with
Just bracing members are set up.Re-segmenting excavates remainder, performs excavation segment structure using along the practice, middle plate performs completion and forms interior prop up
Support finally excavates remaining paragraph, performs two lining structures and internal structure, just overcome above-mentioned difficult point.
Compared with prior art, the present invention it has the following advantages and advantages：
Present invention segmentation excavation by troughs, multiple work surfaces are constructed simultaneously, and construction is accelerated while construction safety is ensured
Progress, Multi-working-surface independently working influence each other small, and small, guarantee construction quality is influenced on molding structure.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is vertical structure schematic diagram in station of the present invention.
Fig. 2 is the vertical layered excavation schematic diagram in station of the present invention；
Fig. 3~Figure 12 is that each step in the embodiment of the present invention corresponds to schematic diagram.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
In embodiment, the number of plies and hop count are only as illustrating that technical scheme of the present invention carries out
Embodiment 1
As shown in Figure 1 and Figure 2,
Step 1, the big ledge in station is excavated, construction ledge two serves as a contrast；
Step 2 draws bracket groove to excavate A1 areas shown in Fig. 3；
Step 3, shown in Fig. 4, left and right sides A2 areas in the middle part of excavation by troughs section are constructed from top to down with digging with branch；
Step 4 shown in Fig. 5, performs A2 areas abutment wall two and serves as a contrast, and excavates B1 areas；Height phase between first layer and the second layer
Deng.
From top to bottom, the gradient of each layering increases with the increase of depth.
The gradient of first Ma Kou job-hoppings is 45 degree.
When excavating the second layer, the gradient of the second Ma Kou job-hoppings is 60 °.
Step 5, shown in Fig. 6, at left and right sides of excavation by troughs section middle and lower part B2 areas, are constructed from top to down with digging with branch；It opens
When digging undermost bracket groove, the kerve construction undermost bracket groove of section：Mortar anchor is symmetrically arranged between slot bottom and side wall
The angle of bar, grouting rock bolt and slot bottom is 70 °.
Step 6 shown in Fig. 7, sets up bracing members；
Step 7, shown in Fig. 8, kerve construction section bracket groove C1 areas；
Step 8, shown in Fig. 9, at left and right sides of excavated section lower part C2 areas, are constructed from top to down with digging with branch；
Step 9 shown in Figure 10, performs inverted arch；
Step 10, shown in Figure 11, apply station B2, C2 area side wall and minus two floor driving harden structure (beam, plate, column, rail are against the wind
Road).Then remove bracing members.
Step 11 shown in Figure 12, performs station internal structure.
In this implementation, before the lining construction of ledge two is made in, ledge excavation is carried out：It is constructed using two side-wall pilot tunnel, first
Left and right sides pilot tunnel is excavated, then excavates mid-board part, when carrying out left and right sides pilot tunnel lower part excavation, need to be drilled with along side wall excavation line
One row's shock relieve vent, the spacing between shock relieve vent is 2~3 times of shock relieve vent aperture two-by-two.
To ensure the density of side wall horizontal construction joint concrete, it is close to the pre-buried Full-face pouring pipe of construction joint.Side wall mould
Plate oblique notches in construction joint position, and skewed slot is risen when horizontal construction joint 30cm, casting concrete, and concrete needs superfilled 30cm
Height, in the process vibration compacting.
Above-described specific embodiment has carried out the purpose of the present invention, technical solution and advantageous effect further
It is described in detail, it should be understood that the foregoing is merely the specific embodiment of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of big ledge method in large section subway station excavates the rapid constructing method of lower part, which is characterized in that does ledge two
After lining, AT STATION middle and lower part using layer and section, excavation by troughs suitable digging formula mode construct, construct the specific steps are：
(1), station is divided into multistage according to station length, and is multilayer by station lower middle portion according to height；
(2), the first layer of first segment draws first layer bracket groove, opens the first Ma Kou job-hoppings, then excavates the both sides soil of first layer bracket groove
Body, performs preliminary bracing and side wall two serves as a contrast, and carries out erection bracing members to first layer, other layers under first layer, into
The construction of row such as first layer, until digging first segment is bottomed, does inverted arch, side wall and middle plate；
(3), such as step (2) carries out the excavation construction of remaining section, does station internal structure after the completion.
2. the big ledge method in large section subway station according to claim 1 excavates the rapid constructing method of lower part, special
Sign is, before the lining construction of ledge two is done, carries out ledge excavation：It is constructed using two side-wall pilot tunnel, first excavates left and right sides pilot tunnel,
Mid-board part is excavated again.
3. the big ledge method in large section subway station according to claim 1 excavates the rapid constructing method of lower part, special
Sign is that the height between first layer and the second layer is equal.
4. the big ledge method in large section subway station according to claim 1 excavates the rapid constructing method of lower part, special
Sign is that from top to bottom, the gradient of each layering increases with the increase of depth.
5. the big ledge method in large section subway station according to claim 4 excavates the rapid constructing method of lower part, special
Sign is that the gradient of the first Ma Kou job-hoppings is 45 degree.
6. the big ledge method in large section subway station according to claim 4 excavates the rapid constructing method of lower part, special
Sign is, when excavating the second layer, the gradient of the second Ma Kou job-hoppings is 60 °.
7. the big ledge method in large section subway station according to claim 1 excavates the rapid constructing method of lower part, special
Sign is, when excavating to undermost bracket groove, the kerve construction undermost bracket groove of section：It is symmetrical arranged between slot bottom and side wall
There is a grouting rock bolt, the angle of grouting rock bolt and slot bottom is 70 °.
8. the big ledge method in large section subway station according to claim 1 excavates the rapid constructing method of lower part, special
Sign is that station longitudinal divisions job-hop segment length control in 9~24m for the first time.
9. the big ledge method in large section subway station according to claim 2 excavates the rapid constructing method of lower part, special
Sign is, when carrying out left and right sides pilot tunnel lower part excavation, row's shock relieve vent need to be drilled with along side wall excavation line, two-by-two between shock relieve vent
Spacing be 2~3 times of shock relieve vent aperture.
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| CN201711480958.5A CN108266209A (en) | 2017-12-29 | 2017-12-29 | A kind of big ledge method in large section subway station excavates the rapid constructing method of lower part |
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| CN201711480958.5A CN108266209A (en) | 2017-12-29 | 2017-12-29 | A kind of big ledge method in large section subway station excavates the rapid constructing method of lower part |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441478A (en) * | 2018-10-09 | 2019-03-08 | 黄河勘测规划设计有限公司 | The advanced leverage of IV class of tunnel, V class surrounding rock encircles damping reinforcement method |
| CN109854280A (en) * | 2019-03-05 | 2019-06-07 | 中铁工程设计咨询集团有限公司 | Core Soil bearing-type support system and its construction method for tunneling subway station |
| CN110159323A (en) * | 2019-05-09 | 2019-08-23 | 中国葛洲坝集团第一工程有限公司 | The construction method fixed with steel arch-shelf is excavated suitable for extra-large cross-section underground chamber |
| CN110486036A (en) * | 2019-08-26 | 2019-11-22 | 中建隧道建设有限公司 | A kind of first branch ledge method construction method of expansion arch springing |
| CN110735656A (en) * | 2019-09-26 | 2020-01-31 | 重庆市轨道交通设计研究院有限责任公司 | Method for reversely building underground excavation station tunnel with ultra-large section in soft rock area based on arch cover method |
| CN110939472A (en) * | 2019-12-24 | 2020-03-31 | 中矿金业股份有限公司 | Construction method of large-section ultrahigh chamber |
| CN111577325A (en) * | 2020-04-20 | 2020-08-25 | 中铁十二局集团有限公司 | Construction method for arch bridge type arc middle plate of underground excavation station |
| CN112065470A (en) * | 2020-09-23 | 2020-12-11 | 中铁四局集团有限公司 | Cave depot tank body excavation method |
| CN114109450A (en) * | 2021-10-20 | 2022-03-01 | 中铁十局集团第一工程有限公司 | Construction method of arch cover type subway station arch springing |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441478B (en) * | 2018-10-09 | 2020-04-28 | 黄河勘测规划设计研究院有限公司 | Method for damping and reinforcing IV-type and V-type surrounding rock advanced rod system arch of tunnel |
| CN109441478A (en) * | 2018-10-09 | 2019-03-08 | 黄河勘测规划设计有限公司 | The advanced leverage of IV class of tunnel, V class surrounding rock encircles damping reinforcement method |
| CN109854280A (en) * | 2019-03-05 | 2019-06-07 | 中铁工程设计咨询集团有限公司 | Core Soil bearing-type support system and its construction method for tunneling subway station |
| CN109854280B (en) * | 2019-03-05 | 2023-09-15 | 中铁工程设计咨询集团有限公司 | Core soil bearing type supporting system for underground excavation of subway station and construction method thereof |
| CN110159323A (en) * | 2019-05-09 | 2019-08-23 | 中国葛洲坝集团第一工程有限公司 | The construction method fixed with steel arch-shelf is excavated suitable for extra-large cross-section underground chamber |
| CN110486036A (en) * | 2019-08-26 | 2019-11-22 | 中建隧道建设有限公司 | A kind of first branch ledge method construction method of expansion arch springing |
| CN110486036B (en) * | 2019-08-26 | 2021-08-03 | 中建隧道建设有限公司 | Construction method for expanding arch foot primary support arch cover method |
| CN110735656B (en) * | 2019-09-26 | 2021-12-24 | 重庆市轨道交通设计研究院有限责任公司 | Method for reversely building underground excavation station tunnel with ultra-large section in soft rock area based on arch cover method |
| CN110735656A (en) * | 2019-09-26 | 2020-01-31 | 重庆市轨道交通设计研究院有限责任公司 | Method for reversely building underground excavation station tunnel with ultra-large section in soft rock area based on arch cover method |
| CN110939472A (en) * | 2019-12-24 | 2020-03-31 | 中矿金业股份有限公司 | Construction method of large-section ultrahigh chamber |
| CN111577325A (en) * | 2020-04-20 | 2020-08-25 | 中铁十二局集团有限公司 | Construction method for arch bridge type arc middle plate of underground excavation station |
| CN112065470A (en) * | 2020-09-23 | 2020-12-11 | 中铁四局集团有限公司 | Cave depot tank body excavation method |
| CN114109450A (en) * | 2021-10-20 | 2022-03-01 | 中铁十局集团第一工程有限公司 | Construction method of arch cover type subway station arch springing |
| CN114109450B (en) * | 2021-10-20 | 2023-05-16 | 中铁十局集团第一工程有限公司 | Construction method of arch cover type subway station arch foot |
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Application publication date: 20180710 |
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