CN110952995A - Construction method for external tunnel door post-cast ring beam - Google Patents
Construction method for external tunnel door post-cast ring beam Download PDFInfo
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- CN110952995A CN110952995A CN201911335453.9A CN201911335453A CN110952995A CN 110952995 A CN110952995 A CN 110952995A CN 201911335453 A CN201911335453 A CN 201911335453A CN 110952995 A CN110952995 A CN 110952995A
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- 238000010276 construction Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000009415 formwork Methods 0.000 claims description 13
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
- 239000004576 sand Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of construction of subway visible tunnels, in particular to a construction method of an external tunnel door post-cast ring beam. The method comprises the steps of setting up an operation platform; dismantling an external steel ring of the tunnel portal; drilling a hoisting hole and a rope saw cutting hole on the pipe sheet; cutting a pipe piece; reinforcing steel bar manufacturing and waterproof detail structure construction; installing a template and a supporting system; pouring concrete; removing the template and curing the concrete; and (5) grouting and plugging at the later stage. Through adopting the post-cast ring roof beam to be external in the design of zero ring section of jurisdiction and structure side wall, the zero ring section of jurisdiction need not chisel except to the inside of the structure side wall, has reduced the construction degree of difficulty, practices thrift the cost, and furthest has reduced the disturbance that adds the solid behind one's back to the section of jurisdiction, has reduced the gushing water sand gushing risk that causes because of abolishing the zero ring section of jurisdiction, has improved the security of construction. The invention is mainly applied to the post-cast ring beam of the tunnel portal.
Description
Technical Field
The invention relates to the technical field of construction of subway visible tunnels, in particular to a construction method of an external tunnel door post-cast ring beam.
Background
After the tunnel between the subway sections is communicated, a tunnel door post-cast ring beam needs to be constructed so as to prevent the structural leakage caused by discontinuity of stations and sections. The conventional method for post-pouring ring beams of tunnel gates in urban subway intervals at present comprises the following steps: adopt embedded structure, the zero ring section of jurisdiction chisels the inside 400mm ~ 600mm position of side wall to station structure promptly, makes the portal ring beam outside that the construction was accomplished flush with station side wall inboard, the problem that this prior art method exists: firstly, the section of jurisdiction chisel removes the volume too much, and is big to former district structure disturbance, and section of jurisdiction and station clearance department easily take place to gush water and gush sand risk during the construction, secondly with inside the pipe chisel to the station side wall, the construction degree of difficulty is big, with high costs, cycle length.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a construction method of an external tunnel door post-cast ring beam. The method cuts off the duct pieces protruding out of the side wall of the station, reduces construction difficulty, reduces influence on an original structure, and improves construction safety and construction efficiency.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a construction method of an external tunnel door post-cast ring beam comprises the following steps:
s1, setting up an operation platform;
s2, dismantling the externally connected steel ring of the tunnel portal;
s3, drilling a hoisting hole and a rope saw cutting hole on the segment;
s4 cutting segment
S5, manufacturing installation steel bars and constructing waterproof detailed structures;
s6, installing a template and a supporting system;
s7, pouring concrete;
s8, removing concrete and curing the concrete;
and S9, grouting and plugging.
In the step S1, before the operation platform is erected, sundries on the bottom plate are cleaned, a steel pipe fastener type scaffold is adopted, and double rows of steel pipes are erected in a shape like a Chinese character 'ri'.
In the step S2, after the pre-buried steel ring of the tunnel door is cleaned, the exposed steel ring is cut off, and the steel ring in the tunnel is reserved.
In the step S3, a through hole is drilled in the middle of the segment as a hoisting hole, a through hole is drilled in the segment connection position in close proximity to the sidewall of the station as a rope saw cutting hole, and a hoisting tool is installed in the hoisting hole.
In the step S4, only the side wall portion of the exposed structure of the zero-ring segment is cut off.
In the step S5, the steel bars at the connection parts of the tunnel gate post-cast ring beam, the zero-ring segment and the structure side wall are connected by a horizontal bar planting mode.
In the step S7, when concrete is poured, the concrete is poured from the reserved opening of the formwork above the ring beam, and the concrete is poured and vibrated uniformly from left to right.
In the step S9, after the concrete is cured to reach the designed strength, whether water leakage exists is observed, and if the water leakage condition at the joint is found, the reserved grouting pipe is used for injecting epoxy resin to stop the leakage until no leakage exists.
Compared with the prior art, the invention has the beneficial effects that:
adopt the post-cast ring roof beam to be external in the design of zero ring section of jurisdiction and structure side wall, the zero ring section of jurisdiction need not chisel and remove to inside the structure side wall, has reduced the construction degree of difficulty, practices thrift the cost, and furthest has reduced the disturbance of reinforcing the solid behind the back to the section of jurisdiction, has reduced the gushing water sand gushing risk that causes because of abolishing the zero ring section of jurisdiction, has improved the security of construction.
Drawings
FIG. 1 is a construction flow chart of the present invention;
FIG. 2 is a schematic diagram of an external tunnel portal ring beam structure according to an embodiment of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
figure 5 is an elevation view of a scaffold operating platform in an embodiment of the invention;
FIG. 6 is a side view of FIG. 4;
fig. 7 is a schematic view of a spreader in an embodiment of the invention;
FIG. 8 is a schematic illustration of a template in an embodiment of the invention;
in the figure: 1 is a bearing platform, 10 is an operation platform, 101 is a guardrail, 102 is a stair, 103 is a throwing rod, 2 is a ring beam, 3 is a zero-ring pipe piece, 30 is a lifting appliance, 301 is a gasket, 4 is a side wall, 5 is an embedded steel ring, 6 is a pipe piece back reinforcement body, 7 is a steel template, 701 is a ring beam template, 702 is a bearing platform template, and 8 is a bottom plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 8, a construction method of an external connection type tunnel door post-cast ring beam, the external connection type tunnel door post-cast ring beam structure comprises a bottom bearing platform 1 and a ring beam 2, the bearing platform 1 is made of plain concrete and is used for supporting the upper ring beam 2, and a segment back reinforcing body 6 is arranged on the periphery of a zero-ring segment 3, and the construction method comprises the following steps: s1, setting up the operation platform 10; s2, dismantling the externally connected steel ring of the tunnel portal; s3, drilling lifting holes and rope pitch cutting holes on the segment; s4, cutting a duct piece S5, manufacturing and installing steel bars and constructing waterproof detailed structures; s6, installing a template and a supporting system; s7, pouring concrete; s8, removing concrete and curing the concrete; and S9, grouting and plugging. Through adopting the design that the ring beam 2 is externally connected with the zero-ring segment 3 and the structure side wall 4, the zero-ring segment 3 does not need to be chiseled to the inside of the structure side wall 4, and the construction difficulty is reduced.
Preferably, in step S1, before the operation platform 10 is erected, the bottom plate 8 is cleaned of sundries, a phi 48 × 3.5mm steel pipe fastener type scaffold is adopted, double rows of steel pipes are erected in a shape like a Chinese character ri, four cross braces are arranged, a ground sweeping rod is arranged 300mm away from the plate surface, the distance between horizontal rods is 1500mm, the distance between vertical rods is 1000mm, the distance between double rows of steel pipes is 1200mm, a square wood formwork is laid on each layer of platform, two rows of throws 103 are arranged on the outer side of the scaffold, nine throws 103 form a 45-degree angle with the bottom plate 8, a guardrail 101 with the height of about 1.2 meters is arranged on the adjacent edge, a stair 102 is arranged, and a dense mesh net and a safety warning identification plate are hung.
Preferably, in step S2, after the portal embedded steel ring 5 is cleaned, the exposed steel ring is cut off by gas cutting, and the steel ring inside the tunnel is retained.
Preferably, in step S3, before cutting off the zero-ring segment 3, a through hole is drilled as a hoisting hole at the middle position of each segment to be cut off by using a water drilling punching machine, a through hole is drilled as a rope saw cutting hole at the segment connecting position close to the station side wall 4, a lifting tool 30 is installed in the hoisting hole, the lifting tool 30 is manufactured by using a round bar with a diameter of 32mm as a lifting connecting member, one end of the lifting tool is turned into a thread, the round bar is connected with a self-made gasket 301 by using a nut with a diameter of 30mm, the other end of the lifting tool is bent into a round shape, and the.
Preferably, in the step S4, only the exposed structure side wall 4 of the segment 3 is cut off, the segment is cut by using a hitlws 15 type diamond wire saw cutting machine, the cutting is performed in blocks according to the principle of 'uniform left and right from top to bottom', the diamond wire saw is operated by a special person, and the cut segment is lifted off the site by a crane in time.
Preferably, in step S5, portal ring beam 2 and section of jurisdiction, 4 seam crossing rings of station side wall respectively lay twice slow setting type water swelling sealing rod and one slip casting pipe, and ring beam 2 adopts the bar planting mode with section of jurisdiction, 4 positions of being connected of station side wall, and the bar planting step includes: positioning → drilling → cleaning hole → derusting steel → preparing anchoring glue → planting bar → solidifying and protecting → inspecting.
Preferably, in step S6, the construction is performed by using the fabricated shaping steel form 7 dedicated for the tunnel door, which includes a ring beam form 701 and a cushion cap form 702, all of which are connected by bolts, and have the same size as the implemented structure, the outer form support is made of telescopic counter-bracing bars and 10# channel steel crossbars, the operating platform 10 is used as a reaction frame, the inner form support is divided into four front and rear 4 bars, and the middle two bars are 2 bars; the supports are all steel pipe scaffolds with the diameter of 48 multiplied by 5mm and cross fasteners, and are matched with jacking to adjust the length and jacking the template tightly.
Preferably, in step S7, the portal ring beam 2 is constructed by a cast-in-place concrete structure, and needs to be transported to a reserved opening of a top formwork of the ring beam 2 through a reserved hoisting opening of a main structure by a pump truck, and needs to be transported by a trolley truck or matched with a ground pump during construction of the portal ring beam 2 without a top plate hole, and related equipment and facilities need to be prepared before casting, so as to ensure that the casting time is as short as possible, and concrete is cast from the reserved opening of the top of the ring beam formwork 701 during casting, a vibrating rod is placed in the portal ring beam to be sufficiently vibrated, the vibration time of each point is about 10 to 20 seconds, and the portal ring beam is uniformly pulled out, so as to ensure that the vibrating and compacting are realized, and the left and right uniform symmetrical casting is ensured during casting.
Preferably, in step S8, pouring is completed, according to the strength condition of the manufactured test block and previous construction experience, in order to ensure the concrete quality, the formwork is disassembled generally for 3 to 5 days, when the formwork is disassembled, the outer formwork is disassembled first, whether the concrete strength meets the formwork disassembling requirement is observed, watering maintenance is performed, then the inner formwork is disassembled from top to bottom, all the disassembled formworks are maintained and stacked in a classified manner, after the formwork is disassembled, defects which do not affect the structural quality, such as local holes, grout leakage surfaces, edge corners and wrong platforms, are immediately repaired, color differences generated by the formwork are polished by abrasive paper as far as possible, and special persons are protected by watering for more than 7 days to prevent concrete from generating cracks and affecting the waterproof effect.
Preferably, in step S9, after the concrete is cured to reach the designed strength, whether water leaks or not is observed, and if the water leaks at the joint, the reserved grouting pipe is used to perform leak stoppage by using epoxy resin until no leakage occurs.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (8)
1. A construction method of an external tunnel door post-cast ring beam is characterized by comprising the following steps: the method comprises the following steps:
s1, setting up an operation platform;
s2, dismantling the externally connected steel ring of the tunnel portal;
s3, drilling a hoisting hole and a rope saw cutting hole on the segment;
s4 cutting segment
S5, manufacturing installation steel bars and constructing waterproof detailed structures;
s6, installing a template and a supporting system;
s7, pouring concrete;
s8, removing concrete and curing the concrete;
and S9, grouting and plugging.
2. The construction method of the external connection type tunnel door post-cast ring beam as claimed in claim 1, wherein the construction method comprises the following steps: in the step S1, before the operation platform is erected, sundries on the bottom plate are cleaned, a steel pipe fastener type scaffold is adopted, and double rows of steel pipes are erected in a shape like a Chinese character 'ri'.
3. The construction method of the external connection type tunnel door post-cast ring beam as claimed in claim 1, wherein the construction method comprises the following steps: in the step S2, after the pre-buried steel ring of the tunnel door is cleaned, the exposed steel ring is cut off, and the steel ring in the tunnel is reserved.
4. The construction method of the external connection type tunnel door post-cast ring beam as claimed in claim 1, wherein the construction method comprises the following steps: in the step S3, a through hole is drilled in the middle of the segment as a hoisting hole, a through hole is drilled in the segment connection position in close proximity to the sidewall of the station as a rope saw cutting hole, and a hoisting tool is installed in the hoisting hole.
5. The construction method of the external connection type tunnel door post-cast ring beam as claimed in claim 1, wherein the construction method comprises the following steps: in the step S4, only the side wall portion of the exposed structure of the zero-ring segment is cut off.
6. The construction method of the external connection type tunnel door post-cast ring beam as claimed in claim 1, wherein the construction method comprises the following steps: in the step S5, the steel bars at the connection parts of the tunnel gate post-cast ring beam, the zero-ring segment and the structure side wall are connected by a horizontal bar planting mode.
7. The construction method of the external connection type tunnel door post-cast ring beam as claimed in claim 1, wherein the construction method comprises the following steps: in the step S7, when concrete is poured, the concrete is poured from the reserved opening of the formwork above the ring beam, and the concrete is poured and vibrated uniformly from left to right.
8. The construction method of the external connection type tunnel door post-cast ring beam as claimed in claim 1, wherein the construction method comprises the following steps: in the step S9, after the concrete is cured to reach the designed strength, whether water leakage exists is observed, and if the water leakage condition at the joint is found, the reserved grouting pipe is used for injecting epoxy resin to stop the leakage until no leakage exists.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335453.9A CN110952995A (en) | 2019-12-23 | 2019-12-23 | Construction method for external tunnel door post-cast ring beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335453.9A CN110952995A (en) | 2019-12-23 | 2019-12-23 | Construction method for external tunnel door post-cast ring beam |
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| CN110952995A true CN110952995A (en) | 2020-04-03 |
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| CN201911335453.9A Pending CN110952995A (en) | 2019-12-23 | 2019-12-23 | Construction method for external tunnel door post-cast ring beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365032A (en) * | 2020-04-15 | 2020-07-03 | 中铁十一局集团城市轨道工程有限公司 | Anti-seepage treatment method for ring beam of tunnel door of subway station |
| CN112282785A (en) * | 2020-10-28 | 2021-01-29 | 上海隧道工程有限公司 | Tunnel portal steel ring installation device and installation method thereof |
| CN113006132A (en) * | 2021-01-29 | 2021-06-22 | 广州地铁设计研究院股份有限公司 | Method for opening tunnel door on side wall of assembled subway station |
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Cited By (4)
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| CN111365032A (en) * | 2020-04-15 | 2020-07-03 | 中铁十一局集团城市轨道工程有限公司 | Anti-seepage treatment method for ring beam of tunnel door of subway station |
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| CN112282785A (en) * | 2020-10-28 | 2021-01-29 | 上海隧道工程有限公司 | Tunnel portal steel ring installation device and installation method thereof |
| CN113006132A (en) * | 2021-01-29 | 2021-06-22 | 广州地铁设计研究院股份有限公司 | Method for opening tunnel door on side wall of assembled subway station |
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Application publication date: 20200403 |