CN110284900A - A kind of extra small clear distance city tunnel supporting construction of broken formation and its job-hopping construction technology - Google Patents
A kind of extra small clear distance city tunnel supporting construction of broken formation and its job-hopping construction technology Download PDFInfo
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- CN110284900A CN110284900A CN201910556290.0A CN201910556290A CN110284900A CN 110284900 A CN110284900 A CN 110284900A CN 201910556290 A CN201910556290 A CN 201910556290A CN 110284900 A CN110284900 A CN 110284900A
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- 238000010276 construction Methods 0.000 title claims abstract description 42
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 22
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 88
- 238000007569 slipcasting Methods 0.000 claims abstract description 51
- 239000003365 glass fiber Substances 0.000 claims abstract description 49
- 238000009412 basement excavation Methods 0.000 claims abstract description 29
- 239000002689 soil Substances 0.000 claims abstract description 9
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 238000007363 ring formation reaction Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 17
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch 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
- E21D19/00—Provisional protective covers for working space
- E21D19/04—Provisional protective covers for working space for use in drifting galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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- 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
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- 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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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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)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention is suitable for Tunnel Engineering technical field, provides a kind of extra small clear distance city tunnel supporting construction of broken formation and its job-hopping construction technology.The supporting construction includes leading tunnel, rear row tunnel, hollow slip casting glass fibre anchor pole, middle rock pillar, leading tunnel just props up, the lining of leading tunnel two, rear row tunnel just prop up and rear row tunnel two serves as a contrast；Leading tunnel, rear row tunnel are all made of step excavation, perform hollow slip casting glass fibre anchor pole, centering rock pillar and two tunnels toward middle rock pillar direction by leading tunnel pilot tunnel and carry out pre-reinforcement adjacent to middle rock pillar side Rock And Soil, create favorable conditions for tunnel subsequent construction.The present invention carries out pre-reinforcement by using hollow slip casting glass fibre anchor pole centering rock pillar and its neighbouring country rock, row tunnel is constructed adjacent to middle rock pillar section using job-hopping method afterwards, when solving the problems, such as to build extra small clear distance city tunnel in broken formation surrounding enviroment are influenced with big or middle rock pillar is unstable, construction risk is high, creates good economic benefit.
Description
Technical field
The invention belongs to Tunnel Engineering technical field more particularly to a kind of extra small clear distance city tunnel supporting knots of broken formation
Structure and its job-hopping construction technology.
Background technique
Due to the limitation of land used, the small-clear-distance tunnel built in city is increasing, and tunnel clear distance is also smaller and smaller, very
The extra small clear-distance tunnel of rock pillar only 2-3m into appearance.City small-clear-distance tunnel generally has thickness of earth covering little, Grades of Surrounding Rock
The features such as poor, and general earth's surface buildings or structures are more, environmental protection requirement is high, using conventional mountain tunnel supporting measure
It is extremely difficult to the protection requirement of earth's surface buildings or structures with construction technology, needs that periphery buildings or structures are removed or moved at this time
Change, cost is high and influences the constructing tunnel duration, and influences greatly on surrounding enviroment, and direct economic effect indirect economic effect is poor.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of extra small clear distance city tunnel branch of broken formation
Protection structure and its job-hopping construction technology, it is intended to when extra small clear distance city tunnel is built in solution in broken formation in the prior art pair
Surrounding building, which is removed or moved, to be changed, and influences the problem of causing deficiency in economic performance greatly to surrounding enviroment.
The embodiments of the present invention are implemented as follows, provides a kind of extra small clear distance city tunnel supporting construction of broken formation,
It is just propped up including leading tunnel, rear row tunnel, hollow slip casting glass fibre anchor pole, middle petrous branch support body, leading tunnel, leading tunnel two
Lining, rear row tunnel just prop up and rear row tunnel two serves as a contrast；The leading tunnel and the rear row tunnel are distributed in the middle rock pillar two
Side, the leading tunnel, the rear row tunnel are all made of CD method step excavation, by the leading tunnel pilot tunnel toward the middle rock
Column direction performs the hollow slip casting glass fibre anchor pole and carries out pre-reinforcement to the middle rock pillar and its neighbouring country rock, for after tunnel
Continuous construction creates favorable conditions, and the hollow slip casting glass fibre anchor pole is perpendicular to the leading tunnel and rear row tunnel
Axis.
Further, several hollow slip casting glass fibre anchor poles are laid in the middle rock pillar and two tunnels in blossom type
In neighbouring middle rock pillar side Rock And Soil.
Further, row tunnel is in after the hollow slip casting glass fibre anchor pole is both the leading tunnel, is described
The temperature pier measure of rock pillar lateral areas block Rock And Soil, and be the permanent reinforcement measure of middle rock pillar.
Further, the hollow slip casting glass fibre anchor pole protrudes into tunnel excavation outline portion and digs with tunnel excavation is synchronous
It removes.
The present invention also provides a kind of job-hopping construction technology of above-mentioned extra small clear distance city tunnel supporting construction of broken formation,
The construction technology includes the following steps:
A, the leading tunnel is excavated far from the middle rock pillar side pilot tunnel top bar block, is performed within the scope of top bar block
Leading tunnel just prop up, temporary support structures, and set interim inverted arch in its bottom, excavate top bar block leading in range
Tunnel just props up and temporary support structures and interim inverted arch closing cyclization；
B, hollow slip casting glass is performed toward middle rock pillar direction from the leading tunnel far from the middle rock pillar side pilot tunnel top bar
Glass fiber anchor rod, and slip casting；
C, it excavates the leading tunnel to get out of a predicament or an embarrassing situation block far from the middle rock pillar side pilot tunnel, performs and get out of a predicament or an embarrassing situation within the scope of block
Leading tunnel just prop up, temporary support structures, the block that makes to get out of a predicament or an embarrassing situation excavates the leading tunnel in range and just props up and gib knot
Structure closing cyclization；
D, toward middle rock pillar direction hollow note is performed from the leading tunnel far from middle rock pillar side pilot tunnel block of getting out of a predicament or an embarrassing situation
Starch glass fibre anchor pole, and slip casting；
E, the leading tunnel is excavated adjacent to the middle leading block in rock pillar side, is synchronized and is excavated within the scope of leading block
Empty slip casting glass fibre anchor pole, and perform the leading tunnel that leading block excavates in range and just prop up, make in the leading tunnel
Leading tunnel just branch closing cyclization；
F, the temporary support structures in the leading tunnel are removed, the leading tunnel two is performed and serves as a contrast；
G, the rear row tunnel is excavated far from the middle rock pillar side pilot tunnel top bar block, is performed within the scope of top bar block
Rear row tunnel just prop up, temporary support structures and set interim inverted arch in its bottom, make the rear row tunnel within the scope of top bar block
Just branch and temporary support structures and interim inverted arch closing cyclization；
H, excavate it is described after row tunnel get out of a predicament or an embarrassing situation block far from the middle rock pillar side pilot tunnel, perform and get out of a predicament or an embarrassing situation within the scope of block
Rear row tunnel just prop up, temporary support structures, make this excavate range in rear row tunnel just prop up, temporary support structures closing at
Ring；
I, rear row tunnel row block behind the middle rock pillar side is excavated, synchronizes and excavates in this excavation range
Empty slip casting glass fibre anchor pole, row block excavates the rear row tunnel in range and just props up after performing, after making in the rear row tunnel
Row tunnel just branch closing cyclization；
J, row tunnel temporary support structures after dismounting perform the rear row tunnel two and serve as a contrast.
Further, in the step i, row block is divided into and is arranged successively behind middle rock pillar side by rear row tunnel
Several blocks excavate first block in several blocks by the orientation of block first, synchronize and excavate described first
Hollow slip casting glass fibre anchor pole within the scope of a block, the rear row tunnel performed within the scope of first block just prop up, make
Row tunnel is just propped up in first block range inner sealing cyclization after described；
Then, the third block in several blocks described in the orientation excavation by troughs by block synchronizes described in excavating
Hollow slip casting glass fibre anchor pole within the scope of third block, at the beginning of performing the rear row tunnel within the scope of the third block
Branch props up the rear row tunnel just in the third block range inner sealing cyclization；
Then, excavate second block in several blocks by the orientation of block, then described in excavation by troughs after
Five block of the row tunnel in row block behind middle rock pillar side, then after excavating row tunnel in row block behind middle rock pillar side
The 4th block, carry out excavation by troughs in the way of such sequence of excavation, every time excavate complete a block after, synchronize and excavate
Hollow slip casting glass fibre anchor pole within the scope of the block, and perform the rear row tunnel within the scope of the block just prop up, make it is described after
Row tunnel is just propped up in the block range inner sealing cyclization.
Further, excavate it is described after each block length of the row tunnel in row block behind middle rock pillar side be 3~
5m, job-hopping remaining soils length is 3~5m.
Compared with prior art, beneficial effect is the embodiment of the present invention: the present invention is by using hollow slip casting glass fibers
It ties up anchor pole centering rock pillar and leading tunnel, rear row tunnel and carries out pre-reinforcement adjacent to the country rock of middle rock pillar, after being excavated using job-hopping method
Row tunnel influences surrounding enviroment when solving to build extra small clear distance city tunnel in broken formation adjacent to the Rock And Soil of middle rock pillar
The problem that rock pillar big or middle is unstable, construction risk is high reduces the influence in tunnel implementation process to periphery table buildings or structures,
Create good direct economic effect indirect economic effect, it is easy to operate, difficulty of construction is low, exploitativeness is high, the construction period can be shortened,
With application value.
Detailed description of the invention
Fig. 1 is the extra small clear distance city tunnel supporting construction sectional schematic diagram of broken formation provided in an embodiment of the present invention；
Fig. 2 is the extra small clear distance city tunnel support construction plane signal of broken formation provided in an embodiment of the present invention
Figure；
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It as shown in Figures 1 and 2, is a kind of extra small clear distance city tunnel supporting knot of broken formation provided in an embodiment of the present invention
Structure.The extra small clear distance city tunnel supporting construction of the broken formation includes leading tunnel 1, rear row tunnel 2, hollow slip casting glass fibre
Branch 7 at the beginning of anchor pole 3, middle rock pillar 4, leading tunnel just prop up 5, leading tunnel two lining 6, rear row tunnel and rear row tunnel two serve as a contrast 8,
In, leading tunnel 1 is distributed in 4 two sides of rock pillar in cloth with rear row tunnel 2, and leading tunnel 1, rear row tunnel 2 are all made of step excavation,
By leading 1 pilot tunnel of tunnel toward middle 4 direction of rock pillar perform several hollow 3 centering rock pillars 4 of slip casting glass fibre anchor pole and its near
Country rock carries out pre-reinforcement, creates favorable conditions for tunnel subsequent construction, and hollow slip casting glass fibre anchor pole 3 is perpendicular to leading
The axis of tunnel 1 and rear row tunnel 2, the hollow slip casting glass fibre anchor pole 3 reinforcing knot of rock pillar 4 and its neighbouring country rock as in
Structure, rock pillar 4 and its neighbouring stability of country rock in enhancing.
In above-described embodiment, several hollow slip casting glass fibre anchor poles 3 are laid in middle rock pillar 4 and leading tunnel in blossom type
1, rear row tunnel 2 is in middle 4 lateral areas block Rock And Soil of rock pillar.Leading tunnel 1 is mutual about middle petrous branch support body 4 with rear row tunnel 2
Symmetrically.
The present invention also provides a kind of construction method of above-mentioned extra small clear distance city tunnel supporting construction of broken formation, constructions
Method includes the following steps:
A, leading tunnel 1 is excavated far from middle 4 side pilot tunnel top bar block 11 of rock pillar, performs 11 range of top bar block block
Interior leading tunnel just props up 5, temporary support structures and sets interim inverted arch in 11 bottom of top bar block, makes 11 model of top bar block
Leading tunnel in enclosing just props up 5, temporary support structures and interim inverted arch closing cyclization.
B, hollow slip casting glass fibre anchor pole 3, and slip casting are performed from top bar block 11 toward middle 4 direction of rock pillar.
C, it excavates leading tunnel 1 to get out of a predicament or an embarrassing situation block 12 far from middle 4 side pilot tunnel of rock pillar, performs and get out of a predicament or an embarrassing situation in 12 range of block
Leading tunnel just props up 5, temporary support structures, and the leading tunnel got out of a predicament or an embarrassing situation in 12 range of block is made just to prop up 5, temporary support structures envelope
Close cyclization.
D, hollow slip casting glass fibre anchor pole 3, and slip casting are performed toward middle 4 direction of rock pillar from block 12 is got out of a predicament or an embarrassing situation.
E, excavate leading tunnel 1 adjacent to the middle leading block 13 in 4 side of rock pillar, synchronize excavate it is hollow in leading 13 range of block
Slip casting glass fibre anchor pole 3, and perform the leading tunnel in leading 13 range of block and just prop up 5, make the leading tunnel in leading tunnel 1
Just prop up 5 closing cyclization in hole.
F, the temporary support structures in leading tunnel 1 are removed, the leading lining of tunnel two 6 is performed.
G, row tunnel 2 performs in 21 range of top bar block far from middle 4 side pilot tunnel top bar block 21 of rock pillar after excavation
Row tunnel just props up 7, temporary support structures and sets interim inverted arch in 21 bottom of top bar block afterwards, makes in 21 range of top bar block
Rear row tunnel just prop up 7, temporary support structures and interim inverted arch closing cyclization.
H, row tunnel 2 is got out of a predicament or an embarrassing situation block 22 far from middle 4 side pilot tunnel of rock pillar after excavation, is performed and is got out of a predicament or an embarrassing situation in 22 range of block
Row tunnel just props up 7, temporary support structures afterwards, and the rear row tunnel for making to get out of a predicament or an embarrassing situation in 22 range of block just props up 7, temporary support structures envelope
Close cyclization.
I, the row block 23 behind middle 4 side of rock pillar of row tunnel 2 after excavation, synchronizes hollow in 23 range of row block after excavating
Slip casting glass fibre anchor pole 3, the rear row tunnel after performing in 23 range of row block just prop up 7, the rear row tunnel after making in row tunnel 2
Just 7 closing cyclization of branch.
J, row tunnel temporary support structures after dismounting, the lining of row tunnel two 8 after performing.
In above-described embodiment, in step i, by rear row tunnel 2, row block 23 is divided into and successively arranges behind middle rock pillar side
Several blocks of column, excavate first block in several blocks by the orientation of block first, synchronize and excavate first area
Hollow slip casting glass fibre anchor pole 3 within the scope of block, the rear row tunnel performed within the scope of first block just prop up 7, row tunnel after making
7 are just propped up in first block range inner sealing cyclization in hole；Then, by several blocks of orientation excavation by troughs of block
Three blocks synchronize the hollow slip casting glass fibre anchor pole 3 excavated within the scope of third block, perform within the scope of third block
Rear row tunnel just prop up 7, it is cyclic in third block range inner sealing just to prop up 7 for row tunnel after making；Then, by the arrangement side of block
To second block excavated in several blocks, then the 5th block in excavation by troughs block 23, then excavate in block 23
4th block, carries out excavation by troughs in the way of such sequence of excavation, is excavated after completing a block every time, synchronizes and excavate this
Hollow slip casting glass fibre anchor pole 3 within the scope of block, and perform the rear row tunnel within the scope of the block and just prop up 7, row tunnel after making
7 are just propped up in the block range inner sealing cyclization in hole.The each block length excavated in block 23 is 3-5m, remaining soils of job-hoping
Length is 3-5m.
As shown in fig.2, rear row tunnel 2 is divided into seven blocks adjacent to middle rock pillar lateral areas block 23 in above-mentioned steps i
For be illustrated, which is set as be arranged successively first block 231, second blocks 232, third blocks
233, the 4th block 234, the 5th block 235, the 6th block 236 and the 7th block 237, each block length are equal
Specific construction process for 3~5m, step i is as follows:
First block 231 after excavating first by the arrangement order direction of block in row block 23, then synchronizes and excavates
Hollow slip casting glass fibre anchor pole 3 in first 231 range of block, performs the rear row tunnel in first 231 range of block
Just branch 7, row tunnel just props up 7 in first 231 range inner sealing cyclization of block after making；Then, row block 23 then after excavation by troughs
In third block 233, synchronize the hollow slip casting glass fibre anchor pole 3 excavated in 233 range of third block, perform third
Rear row tunnel in a 233 range of block just props up 7, and just branch 7 is cyclic in 233 range inner sealing of third block for row tunnel after making,
Then, second block 232 is excavated, the hollow slip casting glass fibre anchor pole 3 excavated in second 232 range of block is synchronized, applies
The rear row tunnel done in second 232 range of block just props up 7, and row tunnel just props up 7 in second 232 range inner sealing of block after making
Cyclization；Then, the 5th block 235 of excavation by troughs synchronizes the hollow slip casting glass fibre excavated in the 5th 235 range of block
Anchor pole 3, the rear row tunnel performed in the 5th 235 range of block just prop up 7, and row tunnel just props up 7 in the 5th 235 model of block after making
Inner sealing cyclization is enclosed, then, the 4th block 234 is excavated, synchronizes the hollow slip casting glass excavated in the 4th 234 range of block
Fiber anchor rod 3, the rear row tunnel performed in the 4th 234 range of block just prop up 7, and row tunnel just props up 7 in the 4th block after making
234 range inner sealing cyclization；Then, the 7th block 237 of excavation by troughs synchronizes the hollow note excavated in the 7th 237 range of block
Glass fibre anchor pole 3 is starched, the rear row tunnel performed in the 7th 237 range of block just props up 7, and row tunnel just props up 7 the 7th after making
Then a 237 range inner sealing cyclization of block excavates the 6th block 236, synchronizes and excavate in the 6th 236 range of block
Hollow slip casting glass fibre anchor pole 3, the rear row tunnel performed in the 6th 236 range of block just prop up 7, and row tunnel just props up 7 after making
In the 6th 236 range inner sealing cyclization of block；In this way, the excavation of row block 23 after the completion.In above-mentioned work progress, open every time
It digs after completing a block, synchronizes the hollow slip casting glass fibre anchor pole 3 excavated within the scope of the block, and perform the block range
Interior rear row tunnel just props up 7, and row tunnel just props up 7 in the block range inner sealing cyclization after making.
In conclusion the present invention is by using hollow 3 centering rock pillar 4 of slip casting glass fibre anchor pole and leading tunnel 1, rear row
Tunnel 2 carries out pre-reinforcement adjacent to the country rock of middle petrous branch support body 4, and row tunnel 2 is adjacent to middle petrous branch support body 4 after being excavated using job-hopping method
It is unstable to influence big or middle rock pillar to surrounding enviroment when extra small clear distance city tunnel is built in solution in broken formation for row block 23 afterwards
Problem fixed, construction risk is high reduces the influence in tunnel implementation process to periphery table buildings or structures, enhances the safety of construction
Property, creates good direct economic effect indirect economic effect, easy to operate, difficulty of construction is low, exploitativeness is high, can shorten construction
Duration has application value.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of extra small clear distance city tunnel supporting construction of broken formation, which is characterized in that including leading tunnel, rear row tunnel,
Hollow slip casting glass fibre anchor pole, middle rock pillar, leading tunnel just prop up, the lining of leading tunnel two, rear row tunnel just prop up and rear row tunnel
Hole two serves as a contrast；The leading tunnel and the rear row tunnel are distributed in the middle rock pillar two sides, past by the leading tunnel pilot tunnel
The middle rock pillar direction performs the hollow slip casting glass fibre anchor pole and carries out pre-reinforcement to the middle rock pillar and its neighbouring country rock,
And the hollow slip casting glass fibre anchor pole is perpendicular to the axis of the leading tunnel and rear row tunnel.
2. the extra small clear distance city tunnel supporting construction of broken formation as described in claim 1, which is characterized in that it is several it is described in
Empty slip casting glass fibre anchor pole is laid in the middle rock pillar and the leading tunnel, the rear row tunnel adjacent to middle rock in blossom type
In column lateral areas block Rock And Soil.
3. the extra small clear distance city tunnel supporting construction of broken formation as described in claim 1, which is characterized in that the hollow note
Slurry glass fibre anchor pole, which protrudes into tunnel excavation outline portion and synchronizes with tunnel excavation, to be excavated.
4. a kind of job-hopping construction technology of the extra small clear distance city tunnel supporting construction of broken formation as described in claim 1,
It is characterized in that, the construction technology includes the following steps:
A, the leading tunnel is excavated far from the middle rock pillar side pilot tunnel top bar block, performs the elder generation within the scope of top bar block
It is propped up at the beginning of row tunnel, temporary support structures, and sets interim inverted arch in its bottom, top bar block is made to excavate the leading tunnel in range
Just branch and temporary support structures and interim inverted arch closing cyclization；
B, hollow slip casting glass fibers are performed toward middle rock pillar direction from the leading tunnel far from the middle rock pillar side pilot tunnel top bar
Tie up anchor pole, and slip casting；
C, it excavates the leading tunnel to get out of a predicament or an embarrassing situation block far from the middle rock pillar side pilot tunnel, performs the elder generation got out of a predicament or an embarrassing situation within the scope of block
It is propped up at the beginning of row tunnel, temporary support structures, making the leading tunnel got out of a predicament or an embarrassing situation in block excavation range, just branch and temporary support structures seal
Close cyclization；
D, toward middle rock pillar direction hollow slip casting glass is performed from the leading tunnel far from middle rock pillar side pilot tunnel block of getting out of a predicament or an embarrassing situation
Glass fiber anchor rod, and slip casting；
E, the leading tunnel is excavated adjacent to the middle leading block in rock pillar side, synchronizes the hollow note excavated within the scope of leading block
Glass fibre anchor pole is starched, and performs the leading tunnel that leading block excavates in range and just props up, is made leading in the leading tunnel
Tunnel just branch closing cyclization；
F, the temporary support structures in the leading tunnel are removed, the leading tunnel two is performed and serves as a contrast；
G, the rear row tunnel is excavated far from the middle rock pillar side pilot tunnel top bar block, after performing within the scope of top bar block
Branch, temporary support structures at the beginning of row tunnel simultaneously set interim inverted arch in its bottom, prop up the rear row tunnel within the scope of top bar block just
With temporary support structures and interim inverted arch closing cyclization；
H, excavate it is described after row tunnel get out of a predicament or an embarrassing situation block far from the middle rock pillar side pilot tunnel, after performing within the scope of block of getting out of a predicament or an embarrassing situation
It is propped up at the beginning of row tunnel, temporary support structures, branch, temporary support structures closing are cyclic at the beginning of making to have excavated the rear row tunnel in range；
I, rear row tunnel row block behind the middle rock pillar side is excavated, the hollow note excavated in this excavation range is synchronized
Glass fibre anchor pole is starched, row block excavates the rear row tunnel in range and just props up after performing, and makes the rear row tunnel in the rear row tunnel
Hole just branch closing cyclization；
J, row tunnel temporary support structures after dismounting perform the rear row tunnel two and serve as a contrast.
5. the job-hopping construction technology of the extra small clear distance city tunnel supporting construction of broken formation as claimed in claim 4, feature
It is, in the step i, by rear row tunnel, row block is divided into several blocks being arranged successively behind middle rock pillar side, first
First block in several blocks first is excavated by the orientation of block, synchronizes and excavates within the scope of first block
Hollow slip casting glass fibre anchor pole, perform rear row tunnel within the scope of first block and just prop up, make it is described after row tunnel
Just branch is in first block range inner sealing cyclization；
Then, the third block in several blocks described in the orientation excavation by troughs by block, synchronizes and excavates the third
Hollow slip casting glass fibre anchor pole within the scope of a block, the rear row tunnel performed within the scope of the third block just prop up, make
Row tunnel is just propped up in the third block range inner sealing cyclization after described；
Then, second block in several blocks is excavated by the orientation of block, then rear row tunnel described in excavation by troughs
Five block of the hole in row block behind middle rock pillar side, then after excavating row tunnel in row block behind middle rock pillar side
Four blocks, carry out excavation by troughs in the way of such sequence of excavation, are excavated after completing a block every time, synchronize and excavate the area
Hollow slip casting glass fibre anchor pole within the scope of block, and perform the rear row tunnel within the scope of the block and just prop up, make the rear row tunnel
It just props up in the block range inner sealing cyclization in hole.
6. the job-hopping construction technology of the extra small clear distance city tunnel supporting construction of broken formation as claimed in claim 5, feature
It is, excavating the rear each block length of the row tunnel in row block behind middle rock pillar side is 3-5m, reserved soil of job-hoping
Body length is 3-5m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910556290.0A CN110284900A (en) | 2019-06-25 | 2019-06-25 | A kind of extra small clear distance city tunnel supporting construction of broken formation and its job-hopping construction technology |
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| CN201910556290.0A CN110284900A (en) | 2019-06-25 | 2019-06-25 | A kind of extra small clear distance city tunnel supporting construction of broken formation and its job-hopping construction technology |
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