CN107975383B - Underground chamber tee T intersection excavation supporting construction method - Google Patents
Underground chamber tee T intersection excavation supporting construction method Download PDFInfo
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- CN107975383B CN107975383B CN201711156378.0A CN201711156378A CN107975383B CN 107975383 B CN107975383 B CN 107975383B CN 201711156378 A CN201711156378 A CN 201711156378A CN 107975383 B CN107975383 B CN 107975383B
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- construction
- main hole
- door frame
- excavation supporting
- arch
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- 238000010276 construction Methods 0.000 title claims abstract description 71
- 238000009412 basement excavation Methods 0.000 title claims abstract description 45
- 230000017105 transposition Effects 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 230000007704 transition Effects 0.000 claims description 9
- 239000011435 rock Substances 0.000 description 10
- 238000009434 installation Methods 0.000 description 4
- 210000005239 tubule Anatomy 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000000003 hoof Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/183—Supporting means for arch members, not provided for in E21D11/22
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to a kind of underground chamber tee T intersection excavation supporting construction methods.The object of the present invention is to provide a kind of underground chamber tee T intersection excavation supporting construction methods that cost is relatively low, safe and reliable to shorten construction period to reduce difficulty of construction.The technical scheme is that a kind of underground chamber tee T intersection excavation supporting construction method, it is characterised in that steps are as follows: 1, the transposition section between excavation supporting working tunnel and main hole；2, the construction channel in the main hole of excavation supporting；3, the main hole of excavation supporting.The present invention is suitable for hydraulic and hydroelectric engineering, geotechnical engineering.
Description
Technical field
The present invention relates to a kind of underground chamber tee T intersection excavation supporting construction methods.Suitable for water conservancy and hydropower work
Journey, geotechnical engineering.
Background technique
It is larger by influence on groundwater in " fourth " the font intersection engineering that the unfavorable geology region of no self-stability is arranged, it applies
Work span is big, and structure is complicated, and stress is concentrated, and excavates difficult forming, and the supporting construction set-up time is long, and country rock and supporting construction are difficult
Overall structure is formed to combine closely, there are larger difficulty of construction and security risks.If reserved rock pillar is excavated, due to country rock rock
Body intensity is lower, and a large amount of concrete of inevitable requirement cast in situs can largely form temporary support；And most steel arch-shelf figures are not
Together, steel arch-shelf processing can be faced, the problem that installation difficulty is big, the time is long；Effect of the prestress anchorage cable in weak surrounding rock is difficult to
Guarantee.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above problems, providing one kind, cost is relatively low, safe and reliable
Underground chamber tee T intersection excavation supporting construction method shorten construction period to reduce difficulty of construction.
The technical scheme adopted by the invention is that: a kind of underground chamber tee T intersection excavation supporting construction method,
It is characterized in that steps are as follows:
1, the transposition section between excavation supporting working tunnel and main hole；
Transposition section includes the horn mouth transition of working tunnel end and the branch hole positioned at branch hole and main hole intersection
Door frame construction space installs steel construction door frame in the door frame construction space of branch hole；
2, the construction channel in the main hole of excavation supporting；
It axially, from the branch hole door frame construction space in main hole is excavated to apart from another side wall in main hole poor one along working tunnel
A cycle operation position, excavated section are rectangle, and using several Jiong word shape steel arch-shelfs arranged along working tunnel axis direction
Carry out supporting；
Continue to be excavated to main hole boundary, is formed from branch hole door frame construction space to the construction channel on main hole boundary, gone forward side by side
The main hole circumferential direction steel arch-shelf construction of row construction channel roof；
3, the main hole of excavation supporting；
3.1, the Jiong word shape steel arch-shelf arch springing of Demolition Construction channel side, carries out the excavation supporting in the main hole in the side；
3.2, the Jiong word shape steel arch-shelf arch springing of the Demolition Construction channel other side, carries out the excavation supporting in the main hole in the side.
There is the steel construction door frame several Pin, every Pin individually to erect, and it is whole to be welded as one for steel construction door frame after erection
Body.
The steel construction door frame has the interior arch of gateway opening shape and the outer arch of Jiong word shape, and interior arch and outer arch are through even
Bar is linked to be entirety.
The excavated section of the horn mouth transition gradually becomes rectangle by gateway opening shape.
The beneficial effects of the present invention are: present invention convenience, safety carry out intersection engineering in unfavorable geological condition area
Operation reduces the difficulty of construction that reserved rock pillar needs to process multiclass shaped steel arch；Subregion step-by-step construction is taken, supporting knot is convenient for
Structure installation is implemented, and can reduce Stress relieving of surrounding rocks and deformation, it is therefore prevented that collapse as early as possible to the country rock formation closing disclosed is excavated
Etc. safety accidents generation, it is ensured that construction personnel, equipment and engineering safety.
Detailed description of the invention
Fig. 1 is the plan view of embodiment.
Fig. 2 is the step excavation figure of embodiment.
Fig. 3 is II-II cross-sectional view of Fig. 1.
Fig. 4 is the C-C cross-sectional view of Fig. 1.
Fig. 5 is the E-E cross-sectional view of Fig. 1.
Specific embodiment
As shown in FIG. 1 to 3, it in the work progress of the present embodiment unfavorable geology underground chamber " fourth " font intersection, takes
Subregion step-by-step construction is divided into Ith area, IIth area and IIIth area and carries out step excavation.
Wherein transposition section of Ith area between working tunnel 1 and main hole 2, the horn mouth transition including working tunnel end
101 and the branch hole door frame construction space 202 positioned at branch hole and main hole intersection, horn mouth transition 101 is used as I area a；Branch
Hole door frame construction space 202 includes I area b and I area c, and I area b is the corresponding excavation area in 101 hole of horn mouth transition, I area c
For the region at the I area edge b, for increasing 202 cross-sectional area of branch hole door frame construction space, to place steel construction door frame 3.
Excavation of 202 side of branch hole door frame construction space in II hole Qu Weizhu 2 to another lateral boundaries in main hole 2 in the present embodiment
Region, IIth area includes II area a, II area b and II area c, from branch hole door frame construction space 202 to apart from main 2 abutment wall of hole only poor one
The region of a cycle operation position is divided into II area a and II area b, from apart from main 2 abutment wall of hole only a poor cycle operation position to
The region on main 2 boundary of hole is II area c.The excavation region in II area, main hole, two sides is IIIth area in this example.
The specific implementation of the present embodiment is as follows:
To guarantee construction safety, while considering horn mouth construction technology, advanced tubule, system are cooperated using shaped steel arch
Anchor pole, reinforced mesh, gunite concrete reinforced supporting scheme, when construction takes " weak blast, short drilling depth, strong supporting " scheme
It organizes and implements.
(1) transposition section between excavation supporting working tunnel 1 and main hole 2 (Ith area), sequence of excavation are followed successively by I area a, I area b
With I area c.
I area's a excavated section fades to rectangle by gateway opening shape identical with 1 excavated section profile of working tunnel, close to Ith area
Ductule layout angle in appropriate adjustment is answered when last ring ductule is constructed at b, makes to be located at ductule between the excavation area of I area b
Advance support within the scope of.
I area's b, c excavated section is rectangle, and excavation length can be according to construction experience appropriate adjustment, to be able to satisfy installation steel knot
The minimum space of structure door frame.I working cycles of area b, c mono- can be completed, and I area b is Blasting Excavation, I area c using pneumatic pick sled
It digs.
Implement interim steel arch-shelf as early as possible after the completion of excavating, then 3 Pin install steel knot in branch hole door frame construction space 202
Structure door frame 3 (HW200x200 door frame), the every Pin of steel construction door frame 3 are individually erected, and door frame is welded as a whole after erection.
As shown in figure 4, steel construction door frame 3 has an interior arch of gateway opening shape and the outer arch of Jiong word shape, interior arch and outer
Arch is linked to be entirety through connecting rod.
(2) in the main hole 2 of excavation supporting branch hole door frame construction space 202 arrive another lateral boundaries in main hole 2 construction channel 201
(IIth area), to form the excavation construction face for excavating main hole 2 on construction 201 two sides conduit wall of channel, sequence of excavation is followed successively by II
Area a, II area b and II area c.
II area's a, b excavated section is rectangle, and II area b of Bing is used along 1 axis direction frame of working tunnel as early as possible after excavating
Vertical several Jiong word shape steel arch-shelfs 4 carry out supporting (see Fig. 5), spray anchor, advanced tubule.
After the completion of II area c is excavated and the main hole circumferential direction steel arch-shelf 5 of II area's vault of progress is constructed, main 2 axis of hole of then constructing
Advanced tubule in III area's span scope of direction.
(3) the main hole 2 (IIIth area) of excavation supporting.
It selects the unilateral side in IIth area to carry out excavation operation, first removes the arch springing of Jiong word shape steel arch-shelf 4 within the scope of the side excavation face
401, the excavation in the main hole 2 of city-gate section of the side is carried out, steel arch-shelf is erected；Main hole gateway opening~shape of a hoof transition is opened
It digs, erects steel arch-shelf.
The arch springing of Jiong word shape steel arch-shelf 4 within the scope of the side excavation face is first removed in the excavation operation for carrying out the II area other side
401, the excavation in the main hole 2 of city-gate section of the side is carried out, steel arch-shelf is erected；Main hole gateway opening~shape of a hoof transition is opened
It digs, erects steel arch-shelf.
Such subregion step-by-step construction is implemented convenient for supporting construction installation, can form closing to the country rock that excavation discloses as early as possible,
Reach whole stressed effect, reduces Stress relieving of surrounding rocks and deformation, it is therefore prevented that the generation of the safety accidents such as collapsing, and ensure to apply
Work safety and tunnel structure safety.
Claims (4)
1. a kind of underground chamber tee T intersection excavation supporting construction method, it is characterised in that steps are as follows:
1.1, the transposition section between excavation supporting working tunnel (1) and main hole (2)；
Transposition section includes the horn mouth transition (101) of working tunnel (1) end and is located at branch hole and main hole (2) intersection
Branch hole door frame construction space (202) installs steel construction door frame (3) in branch hole door frame construction space (202)；
1.2, the construction channel (201) of the main hole of excavation supporting (2)；
It axially, from the branch hole door frame construction space (202) of main hole (2) is excavated to along working tunnel (1) another apart from main hole (2)
The poor cycle operation position of side wall, excavated section is rectangle, and several using arranging along working tunnel (1) axis direction
Jiong word shape steel arch-shelf (4) carries out supporting；
Continue to be excavated to main hole (2) boundary, form the construction channel (201) from branch hole door frame construction space to main hole boundary,
And carry out the construction of the main hole circumferential direction steel arch-shelf (5) at the top of construction channel (201)；
1.3, the main hole of excavation supporting (2)；
1.3.1, Jiong word shape steel arch-shelf (4) arch springing (401) of Demolition Construction channel (201) side, carries out opening for the side main hole (2)
Dig supporting；
1.3.2, Jiong word shape steel arch-shelf (4) arch springing (401) of Demolition Construction channel (201) other side, carries out the main hole in the side (2)
Excavation supporting.
2. underground chamber tee T according to claim 1 intersection excavation supporting construction method, it is characterised in that: described
There is steel construction door frame (3) several Pin, every Pin individually to erect, and steel construction door frame (3) is welded as a whole after erection.
3. underground chamber tee T according to claim 1 or 2 intersection excavation supporting construction method, it is characterised in that:
The steel construction door frame (3) has the interior arch of gateway opening shape and the outer arch of Jiong word shape, and interior arch connects with outer arch through connecting rod
It is integral.
4. underground chamber tee T according to claim 1 intersection excavation supporting construction method, it is characterised in that: described
The excavated section of horn mouth transition (101) gradually becomes rectangle by gateway opening shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711156378.0A CN107975383B (en) | 2017-11-20 | 2017-11-20 | Underground chamber tee T intersection excavation supporting construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711156378.0A CN107975383B (en) | 2017-11-20 | 2017-11-20 | Underground chamber tee T intersection excavation supporting construction method |
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| CN107975383A CN107975383A (en) | 2018-05-01 |
| CN107975383B true CN107975383B (en) | 2019-11-08 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108798731B (en) * | 2018-05-31 | 2019-09-10 | 河南焦煤能源有限公司 | A kind of coal road T-shaped mouth laneway support method |
| CN109404004B (en) * | 2018-11-30 | 2024-02-20 | 中铁隧道集团二处有限公司 | Cave for assembling in tunnel of pipe jacking machine and construction method of cave |
| CN110617091B (en) * | 2019-10-29 | 2021-01-15 | 中铁十七局集团城市建设有限公司 | Construction method of special-shaped steel arch frame at intersection of existing cavern |
| CN112576259B (en) * | 2020-12-14 | 2022-04-15 | 中铁二院工程集团有限责任公司 | Main body auxiliary construction method and structure for station by arch cover method |
| CN112576260B (en) * | 2020-12-14 | 2022-04-22 | 中铁二院工程集团有限责任公司 | Arch cover method tunnel entering construction method and arch cover method tunnel entering supporting structure |
| CN113586079B (en) * | 2021-08-24 | 2024-02-13 | 中国电建集团中南勘测设计研究院有限公司 | Tunnel cross intersection structure and construction method thereof |
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