CN109441489B - Tunnel deep-buried central ditch supporting structure and supporting construction method - Google Patents
Tunnel deep-buried central ditch supporting structure and supporting construction method Download PDFInfo
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- CN109441489B CN109441489B CN201811638251.7A CN201811638251A CN109441489B CN 109441489 B CN109441489 B CN 109441489B CN 201811638251 A CN201811638251 A CN 201811638251A CN 109441489 B CN109441489 B CN 109441489B
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- steel frame
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- supporting
- central ditch
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- 238000010276 construction Methods 0.000 title claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 109
- 239000010959 steel Substances 0.000 claims abstract description 109
- 239000004575 stone Substances 0.000 claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 238000009412 basement excavation Methods 0.000 claims abstract description 8
- 239000004567 concrete Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011378 shotcrete Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
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- 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel deep-buried central ditch supporting structure and a supporting construction method, wherein the supporting structure comprises primary supporting firstly-made steel frames, the primary supporting firstly-made steel frames are arranged at intervals along the tunnel direction, gaps which are formed at the lower parts of the primary supporting firstly-made steel frames and are later-installed after the primary supporting is made, the primary supporting firstly-made steel frames are connected through longitudinal reinforcing beams, and central ditch steel frames are arranged at the lower ends of the primary supporting firstly-made steel frames; the supporting construction method comprises the following steps: and (3) performing unsealed thin shell integral support, excavating soil and stones at the central ditch part, performing central ditch steel frame, placing a central drain pipe, performing steel frame after performing primary support, and completing construction. The invention has novel design concept, reasonable measures and obvious effect, solves the problems of safety and quick construction of the excavation construction of the tunnel deep-buried central ditch section under the condition that the inverted arch primary support is not closed into a ring, ensures the stability and reliability of the tunnel support structure and has wide application prospect.
Description
Technical Field
The invention belongs to the field of supporting structures and supporting construction methods, and particularly relates to a supporting structure of a deep-buried central ditch of a tunnel and a supporting construction method.
Background
In recent years, a plurality of railways in severe cold or cold areas are built and planned in China, and a deep-buried central ditch drainage mode is mostly adopted in railway tunnels in cold areas so as to reduce the risk of freezing injury. However, the deep buried central ditch is arranged below the inverted arch, so that the construction process is implemented under the condition that the primary support of the tunnel is not closed into a ring, and under the condition of weak surrounding rock, if the construction method is improper, the overall stability of the tunnel support structure is reduced, deformation and damage of the support structure are possibly caused, and potential safety hazards are caused to tunnel construction.
Disclosure of Invention
The invention provides a tunnel deep-buried central ditch supporting structure and a supporting construction method, which aim to solve the problems existing in the prior art.
The technical scheme of the invention is as follows: the utility model provides a tunnel buries central ditch supporting construction deeply, includes that the preliminary bracing is first to be made the steelframe, the preliminary bracing is first to be made the steelframe and is set up along tunnel direction interval, and preliminary bracing is first to be made the steelframe lower part and is formed the breach that the steelframe was made after the preliminary bracing of later stage installation, links to each other through vertical stiffening beam between the preliminary bracing first to be made the steelframe, the preliminary bracing is first to be made the steelframe lower extreme and is provided with central ditch steelframe.
The central drain pipe base is arranged in the central drain pipe steel frame, a central drain pipe and graded broken stone are arranged at the upper end of the central drain pipe base, and heat-insulating concrete is arranged at the upper end of the graded broken stone.
And the joint of the primary support firstly applied steel frame and the longitudinal reinforcing beam is provided with a foot locking anchor rod.
The primary support is firstly applied to a steel frame and then is connected with the primary support through a No. I connecting plate.
The primary support is firstly applied to the steel frame and the outer wall of the joint of the primary support and the steel frame is respectively provided with a No. I connecting plate, and the bolt and nut assembly penetrates through the No. I connecting plates to fix the primary support.
The primary support is firstly applied to the steel frame and is connected with the central ditch steel frame through a No. II connecting plate.
The primary support is firstly applied to the outer wall of the lower side of the steel frame, the outer wall of the end part of the central ditch steel frame is provided with a No. II connecting plate, and the bolt and nut assembly penetrates through the No. II connecting plate to fix the primary support.
A supporting construction method of a tunnel deep-buried central ditch supporting structure comprises the following steps:
integral support of thin shell without closure
Under the condition that the primary support is firstly applied to a steel frame and is not closed to form a ring, the primary support which is connected along the tunnel direction by adopting a longitudinal stiffening beam is firstly applied to the steel frame, and the primary support is firstly applied to the steel frame and a Shi Zuosuo foot anchor rod at the staggered part of the longitudinal stiffening beam, so that a stable thin-shell integral support system is formed by a plurality of unsealed steel frames.
Ii, excavating soil and stones at the central ditch part and applying soil and stones to the central ditch steel frame
And excavating soil and stones at the central ditch under the protection of the thin shell supporting system, constructing a central ditch steel frame, reliably connecting the central ditch steel frame with the constructed steel frame of the primary support through a No. I connecting plate, and finally completing the sprayed concrete at the deep-buried central ditch.
Iii placing center drain pipe
Under the condition that an initial support is firstly applied to a steel frame and is connected with a central ditch steel frame to form a closed support system, a central water pipe base is paved, a central drain pipe is arranged on the central water pipe base, and graded broken stone and heat-insulating concrete are arranged on the upper part of the central drain pipe.
Iv post-construction steel frame for primary support construction
And finally, adopting a II-type connecting plate to connect the primary support corresponding to the deep-buried central ditch with the primary support firstly-applied steel frame after being applied to the primary support.
V, finishing the construction
And (5) spraying concrete to finish excavation and support of the deep-buried central ditch section.
The primary support is firstly applied to a steel frame and the longitudinal reinforcing beams are combined to form a plurality of unsealed steel frames.
The primary support is firstly applied to a steel frame, a longitudinal stiffening beam and a foot locking anchor rod to form a thin-shell integral support system.
The invention aims at the tunnel deep-buried central ditch section in the cold and severe cold region to carry out excavation supporting, has novel design concept, reasonable measures and obvious effect, well solves the problems of safety and quick construction of the excavation construction of the tunnel deep-buried central ditch section under the condition that the inverted arch primary support is not closed into a ring, ensures the stability and reliability of the tunnel supporting structure and has wide application prospect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view taken along line I-I of FIG. 1;
FIG. 3 is a cross-sectional view taken along line II-II in FIG. 1;
FIG. 4 is an enlarged schematic view of the structure of the portion A in FIG. 1;
FIG. 5 is an enlarged schematic view of the structure of the portion B in FIG. 1;
FIG. 6 is a flow chart of a support construction method of the present invention;
wherein:
1. the primary support is firstly applied to the longitudinal stiffening beam of the steel frame 2
3. Soil and stones at central ditch of foot locking anchor rod 4
5. Center drain pipe base of center ditch steel frame 6
7. 8-grade crushed stone for central drain pipe
9. Steel frame applied after initial support of heat-insulating concrete 10
11. No. I connecting plate 12 No. II connecting plate.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples:
as shown in fig. 1 to 5, a tunnel deep-buried central ditch supporting structure comprises primary supporting steel frames 1, wherein the primary supporting steel frames 1 are arranged at intervals along the tunnel direction, gaps are formed in the lower parts of the primary supporting steel frames 1 after the primary supporting steel frames are installed at the later stage, the primary supporting steel frames 1 are connected through longitudinal reinforcing beams 2, and central ditch steel frames 5 are arranged at the lower ends of the primary supporting steel frames 1.
The primary support is firstly applied to the steel frame 1, and then is applied to the steel frame 10 to be combined to form a ring shape.
The primary support is firstly applied to the steel frame 1 and uniformly distributed at equal intervals.
The central drain pipe base 6 is arranged in the central drain pipe steel frame 5, a central drain pipe 7 and graded broken stone 8 are arranged at the upper end of the central drain pipe base 6, and heat-insulating concrete 9 is arranged at the upper end of the graded broken stone 8.
The cross section of the central ditch steel frame 5 is open.
The primary support is firstly applied to the joint of the steel frame 1 and the longitudinal reinforcing beam 2, and the foot locking anchor rods 3 are arranged.
The primary support is firstly applied to the steel frame 1 and then is applied to the steel frame 10 through the I-shaped connecting plate 11.
The primary support is firstly applied to the steel frame 1 and the primary support is then applied to the outer wall of the joint of the steel frame 10, the I-shaped connecting plates 11 are arranged on the outer wall, and the bolt and nut assemblies penetrate through the I-shaped connecting plates 11 to fix the primary support.
The primary support is firstly applied to the steel frame 1 and is connected with the central ditch steel frame 5 through a II-type connecting plate 12.
The primary support is firstly applied to the outer wall of the lower side of the steel frame 1, the outer wall of the end part of the central ditch steel frame 5 is provided with a No. II connecting plate 12, and the bolt and nut assembly penetrates through the No. II connecting plate 12 to fix the primary support.
As shown in fig. 6, a supporting construction method of a supporting structure of a deep buried central ditch of a tunnel comprises the following steps:
integral support of thin shell without closure
Under the condition that the primary support is firstly applied to the steel frame 1 and is not closed to form a ring, the primary support which is connected along the tunnel direction by the longitudinal reinforcing beams 2 is firstly applied to the steel frame 1, and the primary support is firstly applied to the steel frame 1 and the Shi Zuosuo foot anchor rods 3 at the staggered parts of the longitudinal reinforcing beams 2, so that a stable thin-shell integral support system is formed by the plurality of unsealed steel frames.
Ii, excavating soil and stones at the central ditch part and applying soil and stones to the central ditch steel frame
And excavating soil and stones 4 at the central ditch under the protection of a thin shell supporting system, constructing a central ditch steel frame 5, reliably connecting the soil and stones with the initial supporting construction steel frame 1 through a No. I connecting plate 11, and finally completing the shotcrete at the deep-buried central ditch.
Iii placing center drain pipe
Under the condition that the primary support is firstly applied to a steel frame 1 and is connected with a central ditch steel frame 5 to form a closed support system, a central water pipe base 6 is paved, a central drain pipe 7 is arranged on the central water pipe base 6, and graded broken stone 8 and heat-insulating concrete 9 are arranged on the upper part of the central drain pipe 7.
Iv post-construction steel frame for primary support construction
Finally, the primary support corresponding to the deep-buried central ditch is applied to the steel frame 10 by adopting the II-type connecting plate 12, and the primary support is firstly applied to the steel frame 1 to be connected.
V, finishing the construction
And (5) spraying concrete to finish excavation and support of the deep-buried central ditch section.
The primary support is firstly applied to a steel frame 1 and a longitudinal reinforcing beam 2 to form a plurality of unsealed steel frames.
The primary support is firstly applied to a steel frame 1, a longitudinal reinforcing beam 2 and a foot locking anchor rod 3 to form a thin-shell integral support system.
The thin-shell integral supporting system provides protection for excavating soil and stones at the central ditch part and applying the soil and stones to the central ditch steel frame, and ensures the feasibility of construction of the thin-shell integral supporting system.
Furthermore, the primary support is firstly applied to the steel frame 1, the longitudinal reinforcement beam 2, the foot locking anchor rods 3 and the central ditch steel frame 5 to form a closed support system, so that the protection is provided for the laying of the central water pipe base 6 and the placement of the central water drain pipe 7, and the feasibility of the construction is ensured.
After the construction of the central drainage ditch is completed, the primary support is firstly applied to the notch of the steel frame 1, and then the steel frame 10 is applied, so that the primary support is closed into a ring.
The invention aims at the tunnel deep-buried central ditch section in the cold and severe cold region to carry out excavation supporting, has novel design concept, reasonable measures and obvious effect, well solves the problems of safety and quick construction of the excavation construction of the tunnel deep-buried central ditch section under the condition that the inverted arch primary support is not closed into a ring, ensures the stability and reliability of the tunnel supporting structure and has wide application prospect.
Claims (7)
1. A supporting construction method of a tunnel deep-buried central ditch supporting structure is characterized by comprising the following steps:
the tunnel deep-buried central ditch supporting structure comprises primary supporting construction steel frames (1), wherein the primary supporting construction steel frames (1) are arranged at intervals along the tunnel direction, gaps are formed in the lower parts of the primary supporting construction steel frames (1) after the primary supporting construction steel frames (10) are arranged at the later stage, the primary supporting construction steel frames (1) are connected through longitudinal reinforcing beams (2), central ditch steel frames (5) are arranged at the lower ends of the primary supporting construction steel frames (1), and the primary supporting construction steel frames (1) and the longitudinal reinforcing beams (2) are combined to form unsealed multiple steel frames; the primary support is firstly applied to a steel frame (1), a longitudinal stiffening beam (2) and a foot locking anchor rod (3) to form a thin-shell integral support system;
the supporting construction method of the tunnel deep-buried central ditch supporting structure comprises the following steps:
integral support of thin shell without closure
Under the condition that the primary support is firstly applied to a steel frame (1) and is not closed to form a ring, connecting the primary support along the tunnel direction by adopting a longitudinal stiffening beam (2), firstly applying the primary support to the steel frame (1), and applying Shi Zuosuo pin anchors (3) at the staggered positions of the longitudinal stiffening beam (2) to the primary support, so that a stable thin-shell integral support system is formed by a plurality of unsealed steel frames;
(ii) excavating earth and stones at the central ditch part and applying the earth and stones to the central ditch steel frame
Excavating soil and stones (4) at the central ditch under the protection of a thin shell supporting system, constructing a central ditch steel frame (5), reliably connecting the soil and stones with the initial supporting constructed steel frame (1) through a No. I connecting plate (11), and finally completing the shotcrete at the deep-buried central ditch;
(iii) placing a center drain pipe
Under the condition that an initial support is firstly applied to a steel frame (1) and is connected with a central ditch steel frame (5) to form a closed support system, a central water pipe base (6) is paved, a central drain pipe (7) is arranged on the central water pipe base (6), and graded broken stones (8) and heat-insulating concrete (9) are arranged on the upper part of the central drain pipe (7);
(iv) post-construction of the Primary support Steel frame
Finally, a II connecting plate (12) is adopted to connect the primary support post-construction steel frame (10) corresponding to the deep-buried central ditch with the primary support post-construction steel frame (1), and after the construction of the central ditch is finished, the primary support post-construction steel frame (10) is installed at the notch of the primary support post-construction steel frame (1), so that the primary support is closed into a ring;
(v) completing the construction
And (5) spraying concrete to finish excavation and support of the deep-buried central ditch section.
2. The supporting construction method of the tunnel deep-buried central ditch supporting structure according to claim 1, which is characterized by comprising the following steps: the central drain pipe base (6) is arranged in the central drain pipe steel frame (5), a central drain pipe (7) and graded broken stone (8) are arranged at the upper end of the central drain pipe base (6), and heat-insulating concrete (9) is arranged at the upper end of the graded broken stone (8).
3. The supporting construction method of the tunnel deep-buried central ditch supporting structure according to claim 1, which is characterized by comprising the following steps: the primary support is firstly applied to the joint of the steel frame (1) and the longitudinal reinforcing beam (2), and the foot locking anchor rod (3) is arranged.
4. The supporting construction method of the tunnel deep-buried central ditch supporting structure according to claim 1, which is characterized by comprising the following steps: the primary support is firstly applied to the steel frame (1) and then is applied to the steel frame (10) to be connected through the I-shaped connecting plate (11).
5. The supporting construction method of the tunnel deep-buried central ditch supporting structure, which is characterized by comprising the following steps of: the primary support is firstly applied to the steel frame (1) and then is applied to the outer wall of the joint of the steel frame (10), the I-shaped connecting plates (11) are arranged on the outer wall of the joint, and the bolt and nut assemblies penetrate through the I-shaped connecting plates (11) to fix the primary support.
6. The supporting construction method of the tunnel deep-buried central ditch supporting structure according to claim 1, which is characterized by comprising the following steps: the primary support is firstly applied to the steel frame (1) and is connected with the central ditch steel frame (5) through a II-type connecting plate (12).
7. The supporting construction method of the tunnel deep-buried central ditch supporting structure according to claim 6, which is characterized in that: the primary support is firstly applied to the outer wall of the lower side of the steel frame (1) and the outer wall of the end part of the central ditch steel frame (5), and is provided with a No. II connecting plate (12), and the bolt and nut assembly penetrates through the No. II connecting plate (12) to fix the primary support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638251.7A CN109441489B (en) | 2018-12-29 | 2018-12-29 | Tunnel deep-buried central ditch supporting structure and supporting construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638251.7A CN109441489B (en) | 2018-12-29 | 2018-12-29 | Tunnel deep-buried central ditch supporting structure and supporting construction method |
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| CN109441489A CN109441489A (en) | 2019-03-08 |
| CN109441489B true CN109441489B (en) | 2024-04-05 |
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