CN110593893A - Main body structure construction method and system for intersection of main tunnel and construction transverse channel - Google Patents
Main body structure construction method and system for intersection of main tunnel and construction transverse channel Download PDFInfo
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- CN110593893A CN110593893A CN201911059540.6A CN201911059540A CN110593893A CN 110593893 A CN110593893 A CN 110593893A CN 201911059540 A CN201911059540 A CN 201911059540A CN 110593893 A CN110593893 A CN 110593893A
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- transverse channel
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- 238000010276 construction Methods 0.000 title claims abstract description 123
- 239000011449 brick Substances 0.000 claims abstract description 131
- 239000004567 concrete Substances 0.000 claims abstract description 81
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims description 58
- 239000002689 soil Substances 0.000 claims description 14
- 238000009415 formwork Methods 0.000 claims description 13
- 239000010410 layer Substances 0.000 claims description 13
- 239000004746 geotextile Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims 2
- 238000004078 waterproofing Methods 0.000 description 10
- 239000002002 slurry Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/06—Lining with building materials with bricks
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/383—Waterproofing; Heat insulating; Soundproofing; Electric insulating by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall
Abstract
The invention discloses a main body structure construction method and a system at the intersection of a main tunnel and a construction transverse channel, wherein the method comprises the following steps: breaking a temporary inverted arch of the right tunnel; building a first brick wall on the left side and reserving a first pouring hole; backfilling concrete to the outer contour of the second backing plate of the right-side tunnel; completing a right tunnel secondary lining structure; backfilling the residual space; breaking a temporary inverted arch between the left tunnel and the right tunnel and between the left tunnel and the right tunnel; building a second brick wall on the right side and reserving a second pouring hole; backfilling concrete between the first brick wall and the second brick wall; building a third brick wall on the left side of the left line tunnel and reserving a third pouring hole; backfilling concrete between the second brick wall and the third brick wall to the outer contour of the second backing plate of the left-line tunnel; constructing a left tunnel secondary lining structure; and backfilling the residual space outside the secondary lining structure of the left line tunnel. The method is safe, reliable and practical, and effectively solves the problem of the construction of the main body structure at the double-cross intersection of the main tunnel and the construction transverse channel.
Description
Technical Field
The invention relates to the field of underground engineering, in particular to a main body structure construction method and a main body structure construction system for the intersection of a main tunnel and a construction transverse channel.
Background
In the construction process of urban subway and mine method tunnels, due to the limitation of geographical conditions and construction conditions, a method of constructing a construction transverse channel firstly and then constructing a main double-line (left line and right line) tunnel from the construction transverse channel to two sides is generally adopted (the construction transverse channel is usually an arch top straight wall double-layer pilot tunnel and additionally provided with a temporary inverted arch structure, and is generally only constructed as a primary support structure, and the main tunnel is usually a standard horseshoe-shaped structure and comprises a primary support structure and a secondary lining). The structure of the intersection is complex, which causes the construction difficulty of the main body structure (two linings) of the main body structure of the main body of the.
Disclosure of Invention
The invention mainly aims at the defects of the prior art, provides a main body structure construction method and a system at the intersection of a main tunnel and a construction transverse channel, has the advantages of safety, reliability, practicability and the like, effectively solves the problem of the construction of the main body structure at the double-cross intersection of the main tunnel and the construction transverse channel, and has very high practical value and popularization value.
The technical scheme adopted by the invention is as follows: a main body structure construction method at the intersection of a main tunnel and a construction transverse passage comprises the following steps:
breaking a temporary inverted arch in the range of the right tunnel, and building a first brick wall on the left side of the right tunnel;
treating the base surface of the two substrate plates of the right tunnel and preventing water;
backfilling the vacant space between the outer contour of the second substrate plate of the right-side tunnel and the first brick wall and the primary support structure of the transverse channel with plain concrete;
sequentially constructing a second substrate plate of the right-side tunnel, a second liner vault and a side wall of the right-side tunnel, and installing a first grouting perforated pipe at the vault position of the construction transverse channel;
backfilling the vacant places between the arch crown and the side wall of the secondary lining of the right tunnel and the first brick wall and the primary support structure of the transverse channel with plain concrete, and then grouting and compacting through the first grouting perforated pipe;
breaking temporary inverted arches between a left tunnel portal and a right tunnel portal and in the range of the left tunnel, building a second brick wall on the right side of the left tunnel and reserving a concrete pouring hole at the top;
backfilling the place between the left tunnel and the right tunnel with plain soil, tamping the plain soil in layers until the plain soil stops at a distance from the vault of the construction transverse channel, and installing a second grouting perforated pipe at the vault of the construction transverse channel;
backfilling the residual vacant place of the vault of the construction transverse channel between the first brick wall and the second brick wall by using plain concrete through the reserved concrete pouring hole, and then grouting and compacting through the second grouting perforated pipe;
building a third brick wall on the left side of the left line tunnel;
treating the base surface of the two substrate plates of the left line tunnel and preventing water;
backfilling vacant places among the second substrate plate of the left-line tunnel, the second brick wall, the third brick wall and the primary support structure of the transverse channel with plain concrete;
sequentially constructing a second substrate plate of the left-line tunnel, a second substrate arch crown and a side wall of the left-line tunnel, and installing a third grouting perforated pipe at the arch crown of the construction transverse channel;
and backfilling vacant places among the arch crown and the side wall of the secondary lining of the left tunnel, the second brick wall, the third brick wall and the primary support structure of the transverse channel with plain concrete, and then grouting and compacting through the third grouting perforated pipe.
In some embodiments of the method of the present invention, the waterproofing of the second substrate board of the right-hand tunnel and the waterproofing of the second substrate board of the left-hand tunnel comprise geotextiles and plastic waterproofing boards, and are provided with protective layers.
In some embodiments of the method, enough throwing and rubbing length is reserved when the two substrate plates of the right-line tunnel and the two substrate plates of the left-line tunnel are used for waterproofing, so that enough lapping length with the waterproofing of the two substrate arches of the right-line tunnel and the side walls and the waterproofing of the two substrate arches of the left-line tunnel and the side walls is ensured.
In some embodiments of the method of the present invention, the waterproofing of the vault and the side wall of the second liner of the right tunnel and the waterproofing of the vault and the side wall of the second liner of the left tunnel comprise geotextile and a plastic waterproof board.
In some embodiments of the method, the spare space between the outer contour of the second substrate plate of the right tunnel and the first brick wall and the primary support structure of the transverse channel is backfilled by using plain concrete with the same label of the second liner of the right tunnel, and an inner template of the second liner of the right tunnel is supported during backfilling.
In some embodiments of the method of the present invention, the empty spaces between the second liner plate of the left-line tunnel and the second brick wall, the third brick wall and the primary support structure of the transverse channel are backfilled with plain concrete of the same mark of the second liner of the left-line tunnel, and an inner template of the second liner of the left-line tunnel is supported during backfilling.
In some embodiments of the method of the present invention, the first brick wall and the closed end wall of the construction cross channel are symmetrically arranged along the centerline of the right tunnel; the first brick wall and the second brick wall are symmetrically arranged along a center line between the left tunnel portal and the right tunnel portal; the second brick wall and the third brick wall are symmetrically arranged along the center line of the left tunnel.
In some embodiments of the method of the present invention, the outer contour elevations of the second substrate plate of the right wire tunnel and the second substrate plate of the left wire tunnel are 300mm above the elevation of the top of the tunnel rail.
In some embodiments of the method of the present invention, concrete pouring holes are reserved on the top of the first brick wall and the top of the second brick wall, and the first grouting floral tube and the third grouting floral tube are respectively installed in the reserved concrete pouring holes.
A main body structure construction system at the intersection of a main tunnel and a construction cross passage comprises:
the first brick wall is built on the left side of the right tunnel;
the right tunnel secondary lining comprises a right tunnel secondary substrate plate, a right tunnel secondary lining arch top and a side wall, and vacant places between the outer contour of the right tunnel secondary substrate plate and the first brick wall and the transverse channel primary support structure and vacant places between the right tunnel secondary lining arch top and the side wall and the first brick wall and the transverse channel primary support structure are backfilled with plain concrete in a segmented mode;
the first grouting perforated pipe is arranged above the arch top and the side wall of the secondary lining of the right tunnel and at the arch top of the construction transverse channel;
the second brick wall is built on the right side of the left linear tunnel, a concrete pouring hole is formed in the top of the second brick wall, the space between the left linear tunnel and the right linear tunnel is backfilled with plain soil and tamped layer by layer until the second brick wall is stopped at a distance from the vault of the construction cross channel, and the remaining vacant space of the vault of the construction cross channel between the first brick wall and the second brick wall is backfilled with plain concrete;
the second grouting perforated pipe is arranged at the vault position of the construction transverse channel between the tunnel portal of the left tunnel and the tunnel portal of the right tunnel;
the third brick wall is built on the left side of the left line tunnel;
the left line tunnel secondary lining comprises a left line tunnel secondary substrate plate, a left line tunnel secondary lining arch top and a side wall, vacant places among the left line tunnel secondary substrate plate, the second brick wall, the third brick wall and the transverse channel primary support structure and vacant places among the left line tunnel secondary substrate plate, the second brick wall, the third brick wall and the transverse channel primary support structure are backfilled by plain concrete in a segmented mode, and the vacant places among the left line tunnel secondary lining arch top and the side wall, the second brick wall, the third brick wall and the transverse channel primary support structure are backfilled by plain concrete in a segmented mode;
and the third grouting perforated pipe is arranged above the arch top of the secondary lining of the left tunnel and the side wall and at the arch top of the construction transverse channel.
The invention provides a construction method for sectionally plugging by using brick walls after dismantling a temporary inverted arch of a construction transverse channel, which has the advantages of safety, reliability, practicability and the like, effectively solves the problem of construction of a main body structure at the 'double-cross' intersection of a positive tunnel and the construction transverse channel, and has very high practical value and popularization value.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a main structure construction method at an intersection of a main tunnel and a construction cross passage according to an embodiment of the present invention.
Fig. 2 is a longitudinal sectional view of the whole body along the longitudinal direction of the construction cross passage after the construction of the main body structure at the intersection of the main body structure and the construction cross passage is completed according to the embodiment of the invention.
Fig. 3 is a longitudinal section of the main body structure at the intersection of the main body structure and the construction cross channel along the transverse direction of the construction cross channel after the construction of the main body structure is completed.
Fig. 4 is a longitudinal sectional view of the construction cross passage along the transverse direction of the construction cross passage after the construction of the main body structure at the intersection of the main body structure and the construction cross passage is completed.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
At present, in the construction of double-line (left line and right line) of a positive line tunnel, a method of constructing a construction transverse channel firstly and then constructing the positive line double-line (left line and right line) tunnel to two sides from the construction transverse channel is generally adopted, the construction transverse channel is usually an arch crown straight wall double-layer pilot hole additionally provided with a temporary inverted arch structure, and is generally only constructed as a primary support structure; the main line tunnel is usually a standard horseshoe-shaped structure comprising a primary support structure and a secondary lining, and is constructed according to the method, so that the cross-shaped part of the main line double-line tunnel and the construction transverse channel is in a double cross shape. The structure of the intersection is complex, which causes the construction difficulty of the main body structure (two linings) of the main body structure of the main body of the.
Aiming at the construction of a main body structure (hereinafter referred to as a 'secondary lining') of the main body structure.
The invention is described in further detail below with reference to the figures and specific examples.
Referring to fig. 1 to 4, an embodiment of the present invention provides a method for constructing a main structure at a crossing of a main tunnel and a construction cross-channel, which mainly includes the following steps:
step S1: breaking a temporary inverted arch in the range of the right tunnel, and building a first brick wall on the left side of the right tunnel;
step S2: treating the base surface of the two substrate plates of the right tunnel and preventing water;
step S3: backfilling the vacant space between the outer contour of the second substrate plate of the right-side tunnel and the first brick wall and the primary support structure of the transverse channel with plain concrete;
step S4: sequentially constructing a second substrate plate of the right-side tunnel, a second liner vault and a side wall of the right-side tunnel, and installing a first grouting perforated pipe at the vault position of the construction transverse channel;
step S5: backfilling the spare parts between the arch crown and the side wall of the secondary lining of the right tunnel and the first brick wall and the primary support structure of the transverse channel with plain concrete, and then grouting and compacting through a first grouting perforated pipe;
step S6: breaking temporary inverted arches between the left tunnel portal and the right tunnel portal and in the range of the left tunnel, building a second brick wall on the right side of the left tunnel and reserving a concrete pouring hole at the top;
step S7: backfilling the place between the left tunnel and the right tunnel with plain soil, tamping the plain soil in layers until the plain soil stops at a distance from the vault of the construction transverse channel, and installing a second grouting perforated pipe at the vault of the construction transverse channel;
step S8: backfilling the remaining vacant place of the vault of the construction transverse channel between the first brick wall and the second brick wall by plain concrete through the reserved concrete pouring hole, and then grouting and compacting by a second grouting perforated pipe;
step S9: building a third brick wall on the left side of the left line tunnel;
step S10: treating the base surface of the two substrate plates of the left line tunnel and preventing water;
step S11: backfilling vacant places among the second substrate plate of the left-line tunnel, the second brick wall, the third brick wall and the primary support structure of the transverse channel with plain concrete;
step S12: sequentially constructing a second substrate plate of the left-line tunnel, a second substrate arch crown and a side wall of the left-line tunnel, and installing a third grouting perforated pipe at the arch crown of the construction transverse channel;
step S13: and backfilling vacant places among the arch crown and the side wall of the secondary lining of the left tunnel, the second brick wall, the third brick wall and the primary support structure of the transverse channel with plain concrete, and then grouting and compacting through a third grouting perforated pipe.
Wherein, the right side tunnel is close to the end wall of the horizontal passageway of construction for the left side tunnel. The first brick wall 11 and the end sealing wall of the construction transverse channel are symmetrically arranged along the center line of the right tunnel; the first brick wall 11 and the second brick wall 12 are symmetrically arranged along the center line between the left tunnel portal and the right tunnel portal; the second brick wall 12 and the third brick wall 13 are symmetrically arranged along the center line of the left tunnel.
Based on the construction method of the main body structure at the intersection of the main tunnel and the construction transverse passage in the embodiment, a construction system of the main body structure at the intersection of the main tunnel and the construction transverse passage is obtained, as shown in fig. 2 to 4, and the construction method mainly comprises the following steps:
and the first brick wall 11 is built on the left side of the right tunnel.
The right tunnel secondary lining 30 comprises a right tunnel secondary substrate plate, a right tunnel secondary lining arch top and a side wall, and vacant places between the outer contour of the right tunnel secondary substrate plate and the first brick wall 11 and the transverse channel primary support structure 20 and vacant places between the right tunnel secondary lining arch top and the side wall and the first brick wall 11 and the transverse channel primary support structure 20 are filled with plain concrete A (plain concrete with the same label as the positive tunnel secondary lining) in a segmented mode.
And the first grouting floral tube 141 is arranged above the second lining vault and the side wall of the right tunnel and at the vault position of the construction cross passage, and after the backfilled plain concrete reaches a certain strength, the gap is filled with slurry through the pre-buried grouting floral tube.
And a second brick wall 12 which is built on the right side of the left linear tunnel 40 and provided with a concrete pouring hole 120 at the top, the place between the left linear tunnel and the right linear tunnel is backfilled with plain soil D and tamped layer by layer until the place is stopped at a distance (1.5m) away from the vault of the construction cross channel, and the remaining vacant place of the vault of the construction cross channel between the first brick wall 11 and the second brick wall 12 is backfilled with plain concrete B (C15 plain concrete).
The second grouting perforated pipe 142 is arranged at the vault position of the construction transverse channel between the tunnel doors of the left tunnel and the right tunnel, and after the C15 plain concrete reaches a certain strength, the gap is filled with pre-embedded grouting perforated pipe grouting slurry;
a third brick wall 13 built on the left side of the left line tunnel;
the left line tunnel secondary lining 40 comprises a left line tunnel secondary substrate plate, a left line tunnel secondary lining vault and a side wall, and vacant places among the left line tunnel secondary substrate plate, the second brick wall 12, the third brick wall 13 and the transverse channel primary support structure 20 are backfilled by plain concrete C (plain concrete with the same label as the positive line tunnel secondary lining) in a segmented mode, and the vacant places among the left line tunnel secondary lining vault and the side wall, the second brick wall 12, the third brick wall 13 and the transverse channel primary support structure 20 are backfilled;
and the third grouting floral tube 143 is installed above the second lining vault and the side wall of the left tunnel and at the vault position of the construction cross passage, and after the backfilled plain concrete reaches a certain strength, the gap is filled with the pre-buried grouting floral tube and the grout.
The following description of a specific operation procedure when the construction method of the above embodiment is applied with reference to fig. 2 to 4 is as follows:
firstly, breaking a temporary inverted arch 10 in the range of a right tunnel (close to a construction transverse passage end-sealed wall);
building a first brick wall 11 from bottom to top along the construction transverse passage structure on the left side of the right tunnel (the brick wall is symmetrical to the construction transverse passage end sealing wall along the middle line of the right tunnel, the brick wall is directly built to the top of the transverse passage from bottom to top, and a concrete pouring hole is reserved at the top of the transverse passage from bottom to top);
then processing the base surface of the second substrate plate of the right-line tunnel, and applying a waterproof layer 15 (geotextile, plastic waterproof plate and protective layer) on the second substrate plate of the right-line tunnel after the base surface is processed;
then, backfilling the vacant places between the outer contour of the second substrate plate of the right-side tunnel and the first brick wall 11 and the primary supporting structure 20 of the transverse channel by using plain concrete with the same mark of the second lining of the positive-side tunnel (an inner template needs to be supported in the step);
then, sequentially constructing two liner plates of the right tunnel (steel bar binding → formwork erecting (inner formwork) → concrete pouring → formwork stripping, concrete surfacing and maintenance);
sequentially constructing a vault and a side wall of the secondary lining of the right tunnel (base surface treatment → waterproof laying (geotextile and plastic waterproof board) → reinforcement → formwork erecting (inner formwork and outer formwork) → concrete pouring → formwork stripping, concrete face repairing and maintenance);
after the concrete of the second lining vault and the side wall of the right tunnel reaches certain strength, mounting pre-embedded grouting perforated pipes at the vault positions of the construction cross passages, backfilling vacant places between the second lining vault and the side wall of the right tunnel and the first brick wall 11 and the cross passage primary support structure 20 by using plain concrete of the same label of the second lining of the right tunnel after the mounting of the grouting perforated pipes is finished, and filling gaps by injecting cement slurry through the pre-embedded grouting perforated pipes after the backfilled plain concrete reaches certain strength;
then the temporary inverted arch 10 of the construction transverse channel between the left and right tunnel doors and in the influence range of the left tunnel is broken, building a second brick wall 12 close to the right side of the left tunnel and backfilling the space between the left tunnel and the right tunnel with plain soil, tamping in layers (the brick wall is symmetrical to the brick wall on the left side of the right tunnel along the center line between the left tunnel door and the right tunnel door, the brick wall is not directly built to the top, the brick wall is required to keep synchronous with the height of backfill earth during building, the backfill earth is backfilled while tamping is carried out until the distance between the backfill earth and the arch top of the cross passage is 1.5m, at the moment, the brick wall is built to the top of the cross passage and a concrete pouring hole 120 is reserved at the top position), installing pre-buried grouting floral tubes at the arch top of the cross passage after backfilling the earth, then, backfilling the remaining 1.5m vacant space of the arch part of the transverse channel between the two brick walls by using C15 plain concrete through the reserved concrete pouring holes, and filling the gaps by using pre-embedded grouting pipes and injecting cement slurry after the C15 plain concrete reaches a certain strength;
finally, building a third brick wall on the left side of the left tunnel (the brick wall is 50cm in thickness and is symmetrical to the brick wall on the right side of the left tunnel along the center line of the left tunnel, and is directly built to the top of the cross passage from bottom to top along the construction cross passage structure, and a concrete pouring hole is reserved at the top);
treating the base surface of the two substrate plates of the left-line tunnel, constructing waterproof 16 (geotextile, plastic waterproof plate and protective layer) of the two substrate plates of the left-line tunnel after the base surface treatment is finished, and backfilling the vacant places among the two substrate plates of the left-line tunnel, the brick walls at two sides and the primary support structure 20 of the transverse passage by using plain concrete with the same label of the secondary lining of the positive-line tunnel (an inner template needs to be erected in the step);
sequentially constructing two backing plates of the left tunnel (steel bar binding → formwork erecting (inner formwork) → concrete pouring → form removal, concrete face building and maintenance), sequentially constructing two lining arches and side walls of the left tunnel (base surface treatment → waterproof laying (geotextile + plastic waterproof plate) → steel bar binding → formwork erecting (inner formwork and outer formwork) → concrete pouring → form removal, concrete face building and maintenance), installing pre-buried grouting floral tubes at the arch tops of the construction transverse channels after the concrete of the two lining arches and the side walls of the left tunnel reaches a certain strength, backfilling the two lining arches and the side walls of the right tunnel and the first lining with plain concrete of the same mark of the two lining arches of the right tunnel after the grouting floral tubes are installed, and the vacant place between the second brick wall and the primary support structure of the transverse channel is filled with slurry through the pre-embedded grouting perforated pipe after the backfilled plain concrete reaches certain strength.
In the method, the left tunnel lining structure and the right tunnel lining structure comprise waterproof, reinforcing steel bars and concrete;
in the method, the first brick wall 11, the second brick wall 12 and the third brick wall 13 are built by clay bricks and masonry mortar, and the thickness is 500 mm;
in the method, a construction transverse passage between double-line (left line and right line) tunnel gates of a main tunnel is backfilled by rammed plain soil and C15 plain concrete, and grouting grout is injected into grouting pattern pipes pre-buried at the vault of the construction transverse passage to ensure the backfilling compactness.
In the method, the secondary lining waterproof of the main tunnel consists of geotextile and a plastic waterproof board, and during construction, the waterproof is laid along the inverted arch of the construction transverse channel, the bricked wall, the side wall of the construction transverse channel and the periphery of the arch crown; when the secondary lining bottom plate of the main tunnel is used for waterproofing, enough throwing and rubbing length needs to be reserved, and enough lapping length between the secondary lining bottom plate and vault and side wall waterproofing can be ensured.
In the method, the reinforcing bars of the secondary lining of the main tunnel are the same as the reinforcing bars of the standard horseshoe-shaped section in the design drawing, and the binding method is also the same;
in the method, the secondary lining outer contour of the main tunnel, a primary support structure of the construction cross passage and a brick wall are backfilled by using secondary lining concrete with the same mark as plain concrete required by a design drawing, and grouting is also pre-buried in the vault of the construction cross passage to inject slurry into a perforated pipe to ensure the backfilling compactness; an inner template needs to be erected during construction of two-substrate concrete (between an inner contour of a second substrate and an outer contour of the second substrate) of the front tunnel, and an inner template and an outer template need to be erected during construction of concrete of a vault and a side wall; during construction, the outer contour of the secondary lining bottom plate of the primary tunnel, the primary support structure of the construction cross channel and the brick wall are backfilled, then the secondary lining bottom plate of the primary tunnel is constructed, then the secondary lining vault and the side wall of the primary tunnel are constructed, and then the outer contour of the secondary lining vault and the side wall of the primary tunnel, the primary support structure of the construction cross channel and the brick wall are backfilled.
In the method, the external backfill of the outline of the second lining bottom plate of the main tunnel and the concrete of the second lining bottom plate of the main tunnel are both required to be poured to be 300mm above the elevation of the rail top.
The construction method provided by the invention has the advantages of safety, reliability, practicability and the like, effectively solves the problem of construction of the main body structure at the double-cross intersection of the main tunnel and the construction transverse channel, and has very high practical value and popularization value.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A main body structure construction method at the intersection of a main tunnel and a construction transverse passage is characterized by comprising the following steps:
breaking a temporary inverted arch in the range of the right tunnel, and building a first brick wall on the left side of the right tunnel;
treating the base surface of the two substrate plates of the right tunnel and preventing water;
backfilling the vacant space between the outer contour of the second substrate plate of the right-side tunnel and the first brick wall and the primary support structure of the transverse channel with plain concrete;
sequentially constructing a second substrate plate of the right-side tunnel, a second liner vault and a side wall of the right-side tunnel, and installing a first grouting perforated pipe at the vault position of the construction transverse channel;
backfilling the vacant places between the arch crown and the side wall of the secondary lining of the right tunnel and the first brick wall and the primary support structure of the transverse channel with plain concrete, and then grouting and compacting through the first grouting perforated pipe;
breaking temporary inverted arches between a left tunnel portal and a right tunnel portal and in the range of the left tunnel, building a second brick wall on the right side of the left tunnel and reserving a concrete pouring hole at the top;
backfilling the place between the left tunnel and the right tunnel with plain soil, tamping the plain soil in layers until the plain soil stops at a distance from the vault of the construction transverse channel, and installing a second grouting perforated pipe at the vault of the construction transverse channel;
backfilling the residual vacant place of the vault of the construction transverse channel between the first brick wall and the second brick wall by using plain concrete through the reserved concrete pouring hole, and then grouting and compacting through the second grouting perforated pipe;
building a third brick wall on the left side of the left line tunnel;
treating the base surface of the two substrate plates of the left line tunnel and preventing water;
backfilling vacant places among the second substrate plate of the left-line tunnel, the second brick wall, the third brick wall and the primary support structure of the transverse channel with plain concrete;
sequentially constructing a second substrate plate of the left-line tunnel, a second substrate arch crown and a side wall of the left-line tunnel, and installing a third grouting perforated pipe at the arch crown of the construction transverse channel;
and backfilling vacant places among the arch crown and the side wall of the secondary lining of the left tunnel, the second brick wall, the third brick wall and the primary support structure of the transverse channel with plain concrete, and then grouting and compacting through the third grouting perforated pipe.
2. The method for constructing a main body structure at the intersection of a main tunnel and a construction cross passage according to claim 1, wherein the right-side main tunnel floor waterproof and the left-side main tunnel floor waterproof comprise geotextiles and plastic waterproof boards, and are provided with protective layers.
3. The method for constructing a main body structure at the intersection of a main tunnel and a construction cross passage as claimed in claim 2, wherein a sufficient length for throwing and rubbing is left when the second bottom plate of the right tunnel is waterproof and the second bottom plate of the left tunnel is waterproof, so as to ensure that the main body structure has a sufficient lap length with the waterproof of the second bottom plate and the waterproof of the side wall of the right tunnel and the waterproof of the second bottom plate and the waterproof of the side wall of the left tunnel.
4. The method for constructing the main structure at the intersection of the main tunnel and the construction cross channel as claimed in claim 3, wherein the waterproof of the arch crown and the side wall of the secondary lining of the right tunnel and the waterproof of the arch crown and the side wall of the secondary lining of the left tunnel comprise geotextile and plastic waterproof boards.
5. The method for constructing a main body structure at the intersection of a main tunnel and a construction transverse channel as claimed in claim 1, wherein the left space between the outer contour of the second substrate plate of the right tunnel and the first brick wall and the primary support structure of the transverse channel is backfilled with plain concrete of the same mark as the second substrate plate of the right tunnel, and an inner template of the second substrate plate of the right tunnel is supported during backfilling.
6. The method for constructing a main body structure at the intersection of a main tunnel and a construction transverse passage as claimed in claim 1, wherein the left tunnel secondary lining is used for backfilling the vacant spaces among the left tunnel secondary lining plate, the second brick wall, the third brick wall and the transverse passage primary support structure with plain concrete of the same mark, and an inner formwork of the left tunnel secondary lining is erected during backfilling.
7. The method for constructing the main body structure at the intersection of the main tunnel and the construction transverse passage according to claim 1, wherein the first brick wall and the closing end wall of the construction transverse passage are symmetrically arranged along the central line of the right tunnel; the first brick wall and the second brick wall are symmetrically arranged along a center line between the left tunnel portal and the right tunnel portal; the second brick wall and the third brick wall are symmetrically arranged along the center line of the left tunnel.
8. The method for constructing a main body structure at the intersection of a main tunnel and a construction cross channel as claimed in claim 1, wherein the outer contour elevations of the two substrate plates of the right-hand tunnel and the two substrate plates of the left-hand tunnel are 300mm above the elevation of the rail top of the tunnel.
9. The method for constructing a main body structure at the intersection of an upright tunnel and a construction cross channel as claimed in claim 1, wherein concrete casting holes are reserved at the top of the first brick wall and the top of the second brick wall, and the first grouting floral tube and the third grouting floral tube are respectively installed at the reserved concrete casting holes.
10. The utility model provides a main part structure construction system of main line tunnel and construction cross passage intersection which characterized in that includes:
the first brick wall is built on the left side of the right tunnel;
the right tunnel secondary lining comprises a right tunnel secondary substrate plate, a right tunnel secondary lining arch top and a side wall, and vacant places between the outer contour of the right tunnel secondary substrate plate and the first brick wall and the transverse channel primary support structure and vacant places between the right tunnel secondary lining arch top and the side wall and the first brick wall and the transverse channel primary support structure are backfilled with plain concrete in a segmented mode;
the first grouting perforated pipe is arranged above the arch top and the side wall of the secondary lining of the right tunnel and at the arch top of the construction transverse channel;
the second brick wall is built on the right side of the left linear tunnel, a concrete pouring hole is formed in the top of the second brick wall, the space between the left linear tunnel and the right linear tunnel is backfilled with plain soil and tamped layer by layer until the second brick wall is stopped at a distance from the vault of the construction cross channel, and the remaining vacant space of the vault of the construction cross channel between the first brick wall and the second brick wall is backfilled with plain concrete;
the second grouting perforated pipe is arranged at the vault position of the construction transverse channel between the tunnel portal of the left tunnel and the tunnel portal of the right tunnel;
the third brick wall is built on the left side of the left line tunnel;
the left line tunnel secondary lining comprises a left line tunnel secondary substrate plate, a left line tunnel secondary lining arch top and a side wall, vacant places among the left line tunnel secondary substrate plate, the second brick wall, the third brick wall and the transverse channel primary support structure and vacant places among the left line tunnel secondary substrate plate, the second brick wall, the third brick wall and the transverse channel primary support structure are backfilled by plain concrete in a segmented mode, and the vacant places among the left line tunnel secondary lining arch top and the side wall, the second brick wall, the third brick wall and the transverse channel primary support structure are backfilled by plain concrete in a segmented mode;
and the third grouting perforated pipe is arranged above the arch top of the secondary lining of the left tunnel and the side wall and at the arch top of the construction transverse channel.
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| CN201911059540.6A CN110593893B (en) | 2019-11-01 | Main body structure construction method and system at intersection of main tunnel and construction transverse channel |
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| CN201911059540.6A CN110593893B (en) | 2019-11-01 | Main body structure construction method and system at intersection of main tunnel and construction transverse channel |
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