AU2021101421A4 - Method for performing stepped remote targeted filling, solidifying, and grouting on hillside of double-track collapse tunnel - Google Patents
Method for performing stepped remote targeted filling, solidifying, and grouting on hillside of double-track collapse tunnel Download PDFInfo
- Publication number
- AU2021101421A4 AU2021101421A4 AU2021101421A AU2021101421A AU2021101421A4 AU 2021101421 A4 AU2021101421 A4 AU 2021101421A4 AU 2021101421 A AU2021101421 A AU 2021101421A AU 2021101421 A AU2021101421 A AU 2021101421A AU 2021101421 A4 AU2021101421 A4 AU 2021101421A4
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- AU
- Australia
- Prior art keywords
- grouting
- tunnel
- collapse
- double
- drilling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 239000011440 grout Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 238000013213 extrapolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Soil Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
Disclosed is a method for performing stepped remote targeted filling, solidifying, and
grouting on a hillside of a double-track collapse tunnel. The construction method is performed
s according to the following steps: performing accurate measurement at the mountain top, and
determining vertical and horizontal ranges of targeted grouting; determining drilling locations
according to a designed layout plan, and excavating a drilling platform; drilling a row of holes
on both sides of the tunnel, and making a curtain by adopting cement-water glass two-shot
grouting, so as to create good conditions for filling collapse body reinforcing grout; after
o grouting at the mountain top for about 2 days, starting to construct a pipe shed and grout in the
tunnel after a loose collapse body is solidified basically. The grouting effect of the loose
collapse body is ensured after the curtain is formed by performing two-shot grouting at a
designed position of the surface of the earth. After grouting at the mountain top for about 2
days, the loose collapse body is solidified basically. The drilling speed and the grouting effect of
s the pipe shed in the tunnel are improved. The excavation and support per cycle are accelerated
obviously, and are improved from original 4 m per month to above 10 m. The collapse treatment
progress is accelerated, and technical and economic effects are achieved.
il
N I N N I I N N t N g I Ij I
*rufi holNeiN i I N * N 4
Tunnel arch
FIG.1I
0 0 0 0 0 0 00
0 0 0 0 0 0
0 0 0 0 0 0 0 0
Grouting hole 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
FIG. 2
Description
il
N I N N I I N N t Ng I Ij I
*rufi holNeiN i I N *N 4
Tunnel arch
FIG.1I
0 0 0 0 0 0 00
0 0 0 0 0 0
0 0 0 0 0 0 0 0 Grouting hole 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
FIG. 2
TECHNICAL FIELD The present disclosure relates to a grouting method capable of effectively improving the treatment progress of large scale collapse of a double-track tunnel, and in particular, to a construction technology for performing remote targeted filling, solidifying, and grouting on the surface of the earth.
BACKGROUND Six collapses occurred in Nashi Tunnel 2 in 17 days in total, and three collapses occurred at the top of the tunnel. The total amount of subsidence was about 300 m3 , many cracks were found, and the widest crack was 5 cm. Arch grouting is performed in the tunnel by matching a s 060 medium pipe shed with a large extrapolation angle and a 089 large pipe shed. Each large pipe shed is 15 m long, each 060 medium pipe shed is 6 m long, each ring is 2.5 m, the
extrapolation angle is 40 °, and the circumferential spacing is 0.4 m. Because of rock stratum
dislocation and large gaps in a collapse area, it is very difficult to drill, and almost every pipe shed is stuck before reaching the designed length. The grouting of each cycle requires more than 20 o days. The excavation and the initial support of each month is only 4 m, so the progress is very slow, and the construction cost is high.
SUMMARY The objective of the present disclosure is to provide a method capable of effectively accelerating excavation and initial support of a collapse tunnel to overcome the disadvantages in collapse treatment in a tunnel. The construction process of the method is simple, practical, economic, and efficient. The technical solution of the present disclosure is: a method for performing stepped remote targeted filling, solidifying, and grouting on a hillside of a double-track collapse tunnel. The construction method is performed according to the following steps: (1) performing accurate measurement at the mountain top, and determining vertical and horizontal ranges of targeted grouting; (2) determining drilling locations according to a designed layout plan, and excavating a drilling platform;
(3) drilling a row of holes on both sides of the tunnel, and making a curtain by adopting cement-water glass two-shot grouting, so as to create good conditions for filling collapse body reinforcing grout; (4) after grouting at the mountain top for about 2 days, starting to construct a pipe shed and grout in the tunnel after a loose collapse body is solidified basically. The drilling range and depth must be determined according to the measured data, and holes must be drilled vertically to ensure the grouting range. The mixing proportion of double-liquid grout must be set through tests, which ensures that the curtain can be formed effectively. o The present disclosure has the following advantages and beneficial effects: (1) the grouting effect of the loose collapse body is ensured after the curtain is formed by performing two-shot grouting at a designed position of the surface of the earth; (2) after grouting at the mountain top for about 2 days, the loose collapse body is solidified basically; the drilling speed and the grouting effect of the pipe shed in the tunnel are effectively improved; the excavation and support per cycle are accelerated obviously, and are improved from original 4 m per month to above 10 m; (3) the collapse treatment progress is accelerated, and good technical and economic effects are achieved.
)o BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal layout of grouting holes in the surface of the earth at tunnel collapse. FIG. 2 is a horizontal layout of the grouting holes in the surface of the earth at the tunnel collapse.
DETAILED DESCRIPTION As shown in FIGs. 1 to 2, a method for performing stepped remote targeted filling, solidifying, and grouting on a hillside of a double-track collapse tunnel. The specific implementation process is as follows: (1) accurately measuring excavation sidelines of a tunnel collapse section at the mountain top, and determining a grouting range; (2) excavating a drilling platform at the mountain top according to a designed grouting hole layout, referring to FIG. 1; (3) drilling a row of holes on both sides of the tunnel, and forming a curtain by adopting cement-water glass two-shot grouting; (4) grouting and reinforcing the loose collapse body, and when a loose collapse body is basically solidified, excavating after constructing a pipe shed in the tunnel and grouting.
A method for performing stepped remote targeted filling, solidifying, and grouting on a hillside of a double-track collapse tunnel is performed according to the following steps: (1) performing accurate measurement at the mountain top, and determining vertical and horizontal ranges of targeted grouting; (2) determining drilling locations according to a designed layout s plan, and excavating a drilling platform; (3) drilling a row of holes on both sides of the tunnel, and making a curtain by adopting cement-water glass two-shot grouting, so as to create good conditions for filling collapse body reinforcing grout; (4) after grouting at the mountain top for about 2 days, starting to construct a pipe shed and grout in the tunnel after a loose collapse body is solidified basically. o The measurement at the mountain top is required to be accurate, and excavation sidelines of a collapse section at the mountain top must be paid off accurately to determine a grouting range. The mixing proportion of double-liquid grout used for constructing the curtain is the key; the grout can neither solidify too fast nor flow too far after flowing out of a grouting pipe, so that a curtain can be effectively formed. s The drilling range and depth for targeted grouting on the surface of the earth must be determined according to the measured data, and the holes must be drilled vertically to ensure the grouting range and effect.
Claims (4)
1. A method for performing stepped remote targeted filling, solidifying, and grouting on a hillside of a double-track collapse tunnel, wherein the construction method is performed s according to the following steps: (1) performing accurate measurement at the mountain top, and determining vertical and horizontal ranges of targeted grouting; (2) determining drilling locations according to a designed layout plan, and excavating a drilling platform; (3) drilling a row of holes on both sides of the tunnel, and making a curtain by adopting cement-water glass two-shot grouting, so as to create good conditions for filling collapse body reinforcing grout; (4) o after grouting at the mountain top for about 2 days, starting to construct a pipe shed and grout in the tunnel after a loose collapse body is solidified.
2. The method for performing stepped remote targeted filling, solidifying, and grouting on a hillside of a double-track collapse tunnel according to claim 1, wherein the measurement at the mountain top is required to be accurate, and excavation sidelines of a tunnel collapse section s must be paid off accurately to determine a grouting targeted range.
3. The method for performing stepped remote targeted filling, solidifying, and grouting on a hillside of a double-track collapse tunnel according to claim 1, wherein the mixing proportion of double-liquid grout used for constructing the curtain is the key; the grout can neither solidify too fast nor flow too far after flowing out of a grouting pipe, so that a curtain can be effectively o formed.
4. The method for performing stepped remote targeted filling, solidifying, and grouting on a hillside of a double-track collapse tunnel according to claim 1, wherein the drilling range and depth for targeted grouting on the surface of the earth must be determined according to measured data, and the holes must be drilled vertically, so as to ensure the grouting range and effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021101421A AU2021101421A4 (en) | 2021-03-19 | 2021-03-19 | Method for performing stepped remote targeted filling, solidifying, and grouting on hillside of double-track collapse tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021101421A AU2021101421A4 (en) | 2021-03-19 | 2021-03-19 | Method for performing stepped remote targeted filling, solidifying, and grouting on hillside of double-track collapse tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021101421A4 true AU2021101421A4 (en) | 2021-05-27 |
Family
ID=76094283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021101421A Ceased AU2021101421A4 (en) | 2021-03-19 | 2021-03-19 | Method for performing stepped remote targeted filling, solidifying, and grouting on hillside of double-track collapse tunnel |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021101421A4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251107A (en) * | 2021-12-16 | 2022-03-29 | 中国电建集团成都勘测设计研究院有限公司 | Tunnel collapse treatment method |
-
2021
- 2021-03-19 AU AU2021101421A patent/AU2021101421A4/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251107A (en) * | 2021-12-16 | 2022-03-29 | 中国电建集团成都勘测设计研究院有限公司 | Tunnel collapse treatment method |
| CN114251107B (en) * | 2021-12-16 | 2023-04-28 | 中国电建集团成都勘测设计研究院有限公司 | Tunnel collapse processing method |
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| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |