CN113279814B - Inverted arch dismantling and replacing construction method for bottom bulging section of high-speed rail tunnel - Google Patents
Inverted arch dismantling and replacing construction method for bottom bulging section of high-speed rail tunnel Download PDFInfo
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- CN113279814B CN113279814B CN202110688429.4A CN202110688429A CN113279814B CN 113279814 B CN113279814 B CN 113279814B CN 202110688429 A CN202110688429 A CN 202110688429A CN 113279814 B CN113279814 B CN 113279814B
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 239000002893 slag Substances 0.000 claims abstract description 17
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 238000009412 basement excavation Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000011378 shotcrete Substances 0.000 claims description 6
- 230000009191 jumping Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of high-speed rail tunnel construction, in particular to a construction method for replacing an inverted arch of a bottom bulging section of a high-speed rail tunnel. The method comprises the following steps: s1, dismantling the track, collecting the fastener and dismantling and replacing equipment protection; s2, cutting the track bed by a disc saw; s3, hoisting the ballast bed to a slag yard: hoisting the whole cut ballast bed to a flat plate transport vehicle by using an excavator, and cleaning the ballast bed to a slag disposal site outside the tunnel; s4, erecting a trestle: hanging and erecting a trestle at an excavation section; s5, installing a side wall reinforcing anchor rod; s6, cutting drainage ditches on two sides and an inverted arch filling layer at the end; s7, cutting a seam on the side wall, and installing an arch center; s8, chiseling and excavating an inverted arch, a ditch and a filling layer; s9, performing concrete spraying construction on the substrate; s10, installing a waterproof layer, binding and installing reinforcing steel bars, and pouring concrete; s11, restoring the ditch cable grooves on the two sides and the ballastless track bed plate; and S12, constructing the next inverted arch dismantling and replacing section. The method has high inverted arch disassembling and replacing efficiency and reduces the working strength. The invention is mainly applied to the aspect of dismounting and replacing the inverted arch of the tunnel bottom drum section.
Description
Technical Field
The invention relates to the technical field of high-speed rail tunnel construction, in particular to a construction method for replacing an inverted arch of a bottom bulging section of a high-speed rail tunnel.
Background
With the continuous development of high-speed rails in China, the continuous defects and diseases of tunnels greatly threaten the normal operation of high-speed rail lines. The tunnel bottom bulge is one of the tunnel defects, and the original damaged and deformed old inverted arch is usually dismantled, and the steel bars are paved again to pour a new concrete inverted arch structure. The inverted arch demolishing section overlength can cause certain deformation influence to two lining structures, and the inverted arch demolishing section overlength can lead to the construction site to be restricted, and mechanical operation face is less, and manual work intensity is big, and time limit for a project pressure is huge.
The problems encountered by inverted arch dismantling and replacing of the existing tunnel bottom heave disease control are analyzed and summarized, and the method is mainly shown in the following steps: the disease treatment period is short, the operation procedures are more, the mutual interference is large, the construction time is too long, and the field period is difficult to meet. The space in the tunnel is limited, mechanical equipment is inconvenient to operate, and the construction efficiency is greatly reduced. The labor intensity of personnel operation is high, the construction efficiency is low, the cost is high, and the operation environment is poor.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the inverted arch dismantling and replacing construction method for the bottom bulging section of the high-speed rail tunnel.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a construction method for replacing an inverted arch at a bottom bulging section of a high-speed rail tunnel comprises the following steps:
s1, dismantling the track, collecting the fastener and dismantling the protection of section-changing equipment;
s2, cutting a track bed by a disc saw;
s3, hoisting the ballast bed to a slag yard: hoisting the whole cut ballast bed to a flat plate transport vehicle by using an excavator, and cleaning the ballast bed to a slag disposal site outside the tunnel;
s4, erecting a trestle: erecting a trestle in the air at the excavation section;
s5, installing a side wall reinforcing anchor rod;
s6, cutting drainage ditches on two sides and an inverted arch filling layer at the end;
s7, cutting a seam on the side wall, and installing an arch center;
s8, chiseling and excavating an inverted arch, a ditch and a filling layer;
s9, performing base concrete spraying construction;
s10, installing a waterproof layer, binding and installing reinforcing steel bars, and pouring concrete;
s11, restoring the ditch cable grooves on the two sides and the ballastless track bed plate;
and S12, constructing the next inverted arch dismantling and replacing section.
In the step S2, a hydraulic disc saw machine and an electric disc saw machine are used for cutting every two sleepers of the section needing to be disassembled and replaced.
In the step S5, three prestressed anchor rods are longitudinally arranged on the side walls on the two sides of the inverted arch dismantling section, and the three prestressed anchor rods are arranged in a quincunx manner.
And in the step S6, cutting the drainage ditches on two sides of the end head of the inverted arch dismantling section and the inverted arch filling layer by using a cutting machine to ensure that the drainage ditches and the inverted arch filling layer are thoroughly disconnected with the undetached section, and protecting finished products of the ditch cable trough of the undetached section.
And S7, joint cutting is carried out on the left side wall and the right side wall of the dismantling section, staggered dismantling is carried out in a hole jumping mode, an arch frame is installed after a base surface is cleaned, a steel frame is used for supporting the free surface, and bolts are used for reinforcing the steel frames.
And in the step S8, the inverted arch filling layer, the original inverted arch structure and the drainage ditch structure are dismantled in a layered mode by adopting breaking hammers, the manual electric pickaxe is matched for face repairing, and the crushed slag is transported to a slag yard by a slag car.
And S9, after the tunnel bottom is excavated to the designed elevation, cleaning the substrate, and backfilling shotcrete.
Compared with the prior art, the invention has the beneficial effects that:
the construction method has the advantages that the reconstruction section of one-time inverted arch dismantling is longer, the number of circulating sections is small, and the overall construction time is shortened. The construction working face has high degree of mechanization, low labor intensity and excellent construction environment. The excavation and reconstruction working surface is large, the mechanical and manual work efficiency is greatly improved, and the construction period is effectively ensured.
Drawings
FIG. 1 is a schematic view of the construction process of the present invention;
FIG. 2 is a schematic view of an inverted arch section of a tunnel according to the present invention;
FIG. 3 is a schematic view of an inverted arch reconstruction structure according to the present invention;
FIG. 4 is a schematic view of an inverted arch section of the present invention;
in the figure: the method comprises the following steps of 1, 2, a track bed, 3, a side wall, 4, an anchor rod, 5, a dismantling range, 51, a drainage ditch, 52, an inverted arch filling layer, 53, an original inverted arch structure, 6, an arch frame, 7, a newly built inverted arch structure, 71, shotcrete, 72, an enhanced inverted arch, 73, new inverted arch filling, 74, a ditch cable trough, 8, an inverted arch dismantling and replacing section, 9, a trestle and 10, wherein the next inverted arch dismantling and replacing section is provided.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
A construction method for replacing an inverted arch of a bottom bulging section of a high-speed rail tunnel comprises the following steps:
s1, dismantling the track 1, collecting the fastener, and dismantling and replacing equipment protection;
s2, cutting the track bed 2 by a disc saw;
s3, hoisting the ballast bed to a slag yard: hoisting the whole cut ballast bed 2 to a flat plate transport vehicle by an excavator, and clearing and transporting the ballast bed to a slag disposal site outside the tunnel; each cutting seam takes about 40 minutes, and each concrete weighs about 5 tons.
S4, erecting a trestle 9: erecting a trestle 9 in the air at the excavation section;
s5, installing a side wall reinforcing anchor rod 4;
s6, cutting the drainage ditches 51 on the two sides and the inverted arch filling layer 52 at the end;
s7, cutting a seam on the side wall 3, and installing an arch frame 6;
s8, chiseling and excavating an inverted arch, a ditch and a filling layer;
s9, performing base concrete spraying construction;
s10, installing a waterproof layer, binding and installing reinforcing steel bars, and pouring concrete;
s11, recovering the ditch cable grooves 74 on the two sides and the ballastless track bed 2 plate;
and S12, constructing the next inverted arch replacing section 10.
Preferably, in step S2, the hydraulic disc saw and the electric disc saw are used to cut every two sleepers of the section to be removed and replaced, so as to cut the whole track bed 2.
Preferably, in step S5, three prestressed anchor rods 4 are longitudinally arranged on the side walls of both sides of the inverted arch replacing section 8, and arranged in a quincunx manner. The YE32-6 type prestressed anchor rods 4 are adopted, the length of each single rod is 6m, the longitudinal distance is 1 m/root, and the included angle between the longitudinal distance and the horizontal line is 15 degrees downwards.
Preferably, in step S6, the drainage ditches 51 and the inverted arch filling layers 52 on both sides of the end of the disassembled inverted arch 8 are cut by a cutting machine so as to be completely disconnected from the un-disassembled and replaced section, and the finished product protection is performed on the cable trough of the ditch of the un-disassembled and replaced section.
Preferably, in the step S7, the left side wall 3 and the right side wall 3 of the inverted arch dismantling section 8 are subjected to joint cutting, staggered dismantling is performed in a hole jumping mode, an arch frame 6 is installed after a base surface is cleaned, a steel frame is used for supporting the empty surface, and the steel frames are reinforced by bolts. And (3) supporting two side free surfaces of the removed side wall 3 by using I20b steel frames, wherein the longitudinal distance between the steel frames is 1 m/each, and each steel frame comprises 2 steel frames. The steel frames are connected through A-shaped connecting steel plates (240mm 220mm), and are fastened and fastened by M24-80 bolts, and the center line, the elevation and the verticality are strictly controlled during erection. Adopt the backing plate to support tightly between shaped steel top surface and existing lining cutting side wall 3, the later stage is no longer demolishd, supports tightly at steelframe bottom and existing side wall 3 also with the backing plate.
Preferably, in step S8, the demolition range 5 includes that the drainage ditch 51, the inverted arch filling layer 52 and the original inverted arch structure 53 adopt breaking hammers to demolish the structures of the inverted arch filling layer 52, the original inverted arch structure 53 and the drainage ditch 51 in layers, the manual electric pickaxe is matched with the face to be repaired, and the crushed slag is transported to a slag yard by a slag car. And manually cutting the concrete in the two sections of the inverted arch dismantling section 8 by adopting an HQS500A type concrete cutting machine.
Preferably, in step S9, after the tunnel bottom is excavated to the designed height, the foundation is cleaned, and the shotcrete 71 is backfilled. The newly built concrete structure 7 comprises 71 shotcrete, 72 reinforced inverted arch and 73 new inverted arch filling, after excavation is finished, the shape of the bottom of the inverted arch is measured by an instrument, and the geometric shape of the bottom is marked by a mode of punching and drilling embedded steel bars by an impact drill. After the tunnel bottom is excavated to the design elevation, the substrate is cleaned, the shotcrete 71 is backfilled, the condition that the substrate is basically consistent with the design shape is strictly achieved, and the error is not more than 5 cm. And after the spray anchor is finished, rechecking the size of the bottom by using a measuring instrument to ensure the construction quality.
Preferably, in step S10, the reinforced inverted arch 72 and the new inverted arch filler layer 73 are cast. The reinforced inverted arch 72 is cast by C40 reinforced concrete, the thickness of the reinforced inverted arch 72 is 55cm, the circumferential reinforced steel bars of the reinforced inverted arch 72 are double-layer reinforced steel bars, and the new inverted arch filling layer 73 and the central ditch structure are cast by C30 concrete. The reinforced inverted arch 72 and the new inverted arch filling layer 73 should be poured separately. The enhanced inverted arch 72 should be constructed using inverted arch templates to ensure the inverted arch shape and curvature.
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 (7)
1. A construction method for replacing an inverted arch of a bottom bulging section of a high-speed rail tunnel is characterized by comprising the following steps:
s1, dismantling the track, collecting the fastener and dismantling the protection of section-changing equipment;
s2, cutting the track bed by a disc saw;
s3, hoisting the ballast bed to a slag yard: hoisting the whole cut ballast bed to a flat plate transport vehicle by using an excavator, and cleaning the ballast bed to a slag disposal site outside the tunnel;
s4, erecting a trestle: hanging and erecting a trestle at an excavation section;
s5, installing a side wall reinforcing anchor rod;
s6, cutting drainage ditches on two sides and an inverted arch filling layer at the end;
s7, cutting a seam on the side wall, and installing an arch frame;
s8, chiseling and excavating an inverted arch, a ditch and a filling layer;
s9, performing base concrete spraying construction;
s10, installing a waterproof layer, binding and installing reinforcing steel bars, and pouring concrete;
s11, restoring the ditch cable grooves on the two sides and the ballastless track bed plate;
and S12, constructing the next inverted arch dismantling and replacing section.
2. The inverted arch dismantling construction method for the floor drum section of the high-speed railway tunnel according to claim 1, characterized in that: in the step S2, a hydraulic disc saw machine and an electric disc saw machine are used for cutting every two sleepers of the section needing to be disassembled and replaced.
3. The inverted arch dismantling and replacing construction method for the bottom drum section of the high-speed railway tunnel according to claim 1, characterized in that: in the step S5, three prestressed anchor rods are longitudinally arranged on the side walls on the two sides of the inverted arch dismantling section, and the three prestressed anchor rods are arranged in a quincunx manner.
4. The inverted arch dismantling construction method for the floor drum section of the high-speed railway tunnel according to claim 1, characterized in that: and in the step S6, cutting the drainage ditches on two sides of the end head of the inverted arch dismantling section and the inverted arch filling layer by using a cutting machine to ensure that the drainage ditches and the inverted arch filling layer are thoroughly disconnected with the undetached section, and protecting finished products of the ditch cable trough of the undetached section.
5. The inverted arch dismantling and replacing construction method for the bottom drum section of the high-speed railway tunnel according to claim 1, characterized in that: in the step S7, the left side wall and the right side wall of the inverted arch dismantling section are subjected to joint cutting, the inverted arch dismantling section is dismantled in a hole jumping mode in a staggered mode, an arch frame is installed after a base surface is cleaned, a steel frame is used for supporting the empty surface, and the steel frames are reinforced through bolts.
6. The inverted arch dismantling construction method for the floor drum section of the high-speed railway tunnel according to claim 1, characterized in that: and in the step S8, a breaking hammer is adopted to disassemble the inverted arch filling layer, the original inverted arch structure and the drainage ditch structure layer by layer, the manual electric pickaxe is matched to repair the surface, and the crushed slag is transported to a slag yard by a slag car.
7. The inverted arch dismantling construction method for the floor drum section of the high-speed railway tunnel according to claim 1, characterized in that: and S9, after the tunnel bottom is excavated to the designed elevation, cleaning the substrate, and backfilling shotcrete.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110688429.4A CN113279814B (en) | 2021-06-21 | 2021-06-21 | Inverted arch dismantling and replacing construction method for bottom bulging section of high-speed rail tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110688429.4A CN113279814B (en) | 2021-06-21 | 2021-06-21 | Inverted arch dismantling and replacing construction method for bottom bulging section of high-speed rail tunnel |
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| CN113279814A CN113279814A (en) | 2021-08-20 |
| CN113279814B true CN113279814B (en) | 2023-04-18 |
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| CN111577334A (en) * | 2020-05-20 | 2020-08-25 | 招商局重庆交通科研设计院有限公司 | Operating tunnel inverted arch repairing method |
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2021
- 2021-06-21 CN CN202110688429.4A patent/CN113279814B/en active Active
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