CN112253137A - Construction method for removing and reinforcing key technology of ingate - Google Patents
Construction method for removing and reinforcing key technology of ingate Download PDFInfo
- Publication number
- CN112253137A CN112253137A CN202011208564.6A CN202011208564A CN112253137A CN 112253137 A CN112253137 A CN 112253137A CN 202011208564 A CN202011208564 A CN 202011208564A CN 112253137 A CN112253137 A CN 112253137A
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- Prior art keywords
- steel
- door
- hole
- key technology
- door frame
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 title claims description 20
- 238000005516 engineering process Methods 0.000 title claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 241001023788 Cyttus traversi Species 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 238000009412 basement excavation Methods 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 239000011378 shotcrete Substances 0.000 abstract description 3
- 239000002893 slag Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- 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
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for checking whether an upward inclination angle meets requirements by using an angle instrument for checking whether a large pipe shed is arranged with key control and correct angle. A pipe shed drilling machine is adopted for drilling, and due to the fact that the space in the hole is small, the hole opening needs to be plugged before grouting of the large pipe shed, and a grouting hole and an exhaust hole are reserved; the steel door frame is vertically installed, and flange plate bolts at the joint of each unit of the door frame are effectively connected and installed by adopting bolts or welded; two steel beams of the door frame are also welded and connected into a whole; when the door frame is installed, the part of the installation area is chiseled off, and sprayed concrete exposes the primary steel frame and is connected with the steel frame by plug welding. Measuring and accurately releasing a contour line before the ingate is broken, taking the space of the I-shaped steel into consideration, and gradually breaking the contour line from top to bottom by manually holding a pneumatic pick; and arranging and erecting a steel frame at the position of the horse head door. After the ingate is broken, the collapse of the opening is effectively avoided, and the safety of the invention is ensured by a reinforcing mode.
Description
Technical Field
The invention relates to the technical field of tunnel construction processes, in particular to a construction method of a bridgehead breaking and reinforcing key technology.
Background
The ingate is a transition section for connecting a shaft bottom parking lot roadway with a vertical shaft, is a throat part of a mine, and has long service life. At the joint of the vertical shaft and the drift (goaf), the space is large, the top is inclined, and the section is similar to a horsehead tunnel. The device is a connection roadway of a vertical shaft and a shaft bottom yard, and a ingate is provided with a stable tank, a trolley, a vehicle stopping device, a signal room and the like. The ingate is supported by fireproof materials, such as concrete or reinforced concrete.
However, when the horsehead is broken, the collapse of the hole may be caused, and the life safety of field constructors is threatened, thereby bringing about serious consequences or economic loss.
Disclosure of Invention
The technical problem to be solved by the invention is the technical problem of the background technology, and the invention aims to provide a construction method of a bridgehead door breaking and reinforcing key technology, and solve the problem of reinforcing a hole corresponding to the bridgehead door.
The invention is realized by the following technical scheme:
the construction method of the horsehead door breaking and reinforcing key technology comprises the following steps:
plugging the hole and reserving a grouting hole and an exhaust hole before grouting the large pipe shed;
the steel door frame is vertically installed, and flange plate bolts at the joint of each unit of the door frame are effectively connected and installed by adopting bolts or welded; two steel beams of the door frame are also welded and connected into a whole; when the door frame is installed, chiseling off the part of the installation area to spray concrete, exposing the primary support steel frame, and connecting the primary support steel frame with the steel frame by plug welding;
measuring and accurately releasing a contour line before the ingate is broken, taking the space of the I-shaped steel into consideration, and gradually breaking the contour line from top to bottom by manually holding a pneumatic pick;
and arranging and erecting a steel frame at the position of the horse head door.
Furthermore, the large pipe shed is made of phi 108 steel pipe raw materials of 6m in length, arranged along the 300mm circumference of the outer edge of an excavation contour line, 300mm in circumferential distance and 9m in longitudinal length, and is arranged along the 130-degree excavation range of the channel arch.
Furthermore, the large pipe shed adopts a quincuncial arrangement that a small hole with the diameter of 10mm is drilled on the inner pipe wall within the range of 6m at the front end, and the small hole @200mm multiplied by 200 mm; wherein, the wire tube is lengthened by 3m +6m, and the joints are arranged in a staggered way.
Further, the hole opening is plugged before grouting of the large pipe shed, a grouting hole and an exhaust hole are reserved, cement or water glass double-liquid slurry is adopted for grouting of a sandy gravel stratum with water, cement slurry is adopted for an anhydrous or low-water stratum, and grouting pressure is 0.5-1 MPa.
Further, the steel door frame adopts two to piece together worker 20 shaped steel processing and forms, hugs closely the passageway and just props up the installation, establishes 5 connecting plates, and every department adopts ring flange, bolted connection, and the steel door frame is installed in passageway and big section junction, and the protection entrance to a cave prevents that the country rock is out of shape.
Further, the contour line needs to be provided with a margin for measurement paying-off.
And further, the ingate is broken, the manual hand-held pneumatic pick is adopted for breaking, the broken slag is broken gradually from outside to inside along the excavation contour line, and the broken slag is transported out of the tunnel at any time.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the construction method of the horsehead door breaking and reinforcing key technology, after the horsehead door is broken, collapse of the hole is effectively avoided;
2. the construction method of the horsehead door breaking and reinforcing key technology ensures the safety of the horsehead door breaking and reinforcing key technology in a reinforcing mode.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a flow diagram of a method of constructing a horsehead door breaking reinforcement critical technology according to some embodiments of the present invention.
Detailed Description
In order to better understand the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with the accompanying drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the examples of the present invention are the detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features in the embodiments and the examples of the present invention may be combined with each other without conflict.
In the following detailed description, numerous specific details are set forth by way of examples in order to provide a thorough understanding of the relevant guidance. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, systems, compositions, and/or circuits have been described at a relatively high-level, without detail, in order to avoid unnecessarily obscuring aspects of the invention.
These and other features, functions, methods of execution, and combination of functions and elements of related elements in the structure and economies of manufacture disclosed in the present application may become more apparent upon consideration of the following description with reference to the accompanying drawings, all of which form a part of this application. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the application. It should be understood that the drawings are not to scale. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the invention. It should be understood that the drawings are not to scale.
Flowcharts are used herein to illustrate the implementations performed by systems according to embodiments of the present application. It should be expressly understood that the processes performed by the flowcharts may be performed out of order. Rather, these implementations may be performed in the reverse order or simultaneously. In addition, at least one other implementation may be added to the flowchart. One or more implementations may be deleted from the flowchart.
It is to be understood that fig. 1 is a flowchart of a construction method of a horsehead door breaking and reinforcing key technology according to some embodiments of the present invention, and may specifically include the contents described in step S21-step S24.
And step S21, plugging the hole and reserving a grouting hole and an exhaust hole before grouting the large pipe shed.
And step S22, vertically installing the steel door frame, effectively connecting flange plate bolts at the joint of each unit of the door frame, and welding parts which cannot be provided with bolts. Two steel beams of the door frame are also welded and connected into a whole; when the door frame is installed, the part of the installation area is chiseled off, and sprayed concrete exposes the primary steel frame and is connected with the steel frame by plug welding.
And step S23, measuring and accurately releasing the contour line before the ingate is broken, taking the space of the I-shaped steel into consideration, and gradually breaking the contour line from top to bottom by adopting a manual hand-held pneumatic pick.
And step S24, arranging an erection steel frame at the position of the horse head door.
It can be understood that when the above-mentioned steps S21-S24 are performed, the large canopy is emphasized to control the correct setting of the tilt angle, and the tilt angle is checked by the angle gauge to see whether the tilt angle meets the requirement. A pipe shed drilling machine is adopted for drilling, and simple equipment is often adopted due to the narrow space in the hole; plugging the hole and reserving a grouting hole and an exhaust hole before grouting the large pipe shed; the steel door frame is vertically installed, and flange plate bolts at the joint of each unit of the door frame are effectively connected and installed by adopting bolts or welded; two steel beams of the door frame are also welded and connected into a whole; when the door frame is installed, the part of the installation area is chiseled off, and sprayed concrete exposes the primary steel frame and is connected with the steel frame by plug welding. Measuring and accurately releasing a contour line before the ingate is broken, taking the space of the I-shaped steel into consideration, and gradually breaking the contour line from top to bottom by manually holding a pneumatic pick; and arranging and erecting a steel frame at the position of the horse head door. After the ingate is broken, the collapse of the opening is effectively avoided, and the safety of the invention is ensured by a reinforcing mode.
Furthermore, the large pipe shed is made of phi 108 steel pipe raw materials of 6m in length, arranged along the 300mm circumference of the outer edge of an excavation contour line, 300mm in circumferential distance and 9m in longitudinal length, and is arranged along the 130-degree excavation range of the channel arch.
It can be understood that the most preferred construction process adopts the scheme for processing, so that the cost is saved, and the reinforcing strength can be effectively increased.
Furthermore, the large pipe shed adopts a quincuncial arrangement that a small hole with the diameter of 10mm is drilled on the inner pipe wall within the range of 6m at the front end, and the small hole @200mm multiplied by 200 mm; wherein, the wire tube is lengthened by 3m +6m, and the joints are arranged in a staggered way.
It can be understood that the risk coefficient is greatly reduced by adopting the arrangement mode.
Further, the hole opening is plugged before grouting of the large pipe shed, a grouting hole and an exhaust hole are reserved, cement or water glass double-liquid slurry is adopted for grouting of a sandy gravel stratum with water, cement slurry is adopted for an anhydrous or low-water stratum, and grouting pressure is 0.5-1 MPa.
It can be understood that the grouting holes and the exhaust holes are arranged, grouting efficiency is effectively increased, and construction period is reduced.
Further, the steel door frame adopts two to piece together worker 20 shaped steel processing and forms, hugs closely the passageway and just props up the installation, establishes 5 connecting plates, and every department adopts ring flange, bolted connection, and the steel door frame is installed in passageway and big section junction, and the protection entrance to a cave prevents that the country rock is out of shape.
The reinforcing mode can be understood, the risk of collapse is effectively avoided, and the life safety of constructors is protected.
Further, the contour line needs to be provided with a margin for measurement paying-off.
It can be understood that the accuracy of excavation is determined, tunnel construction errors are effectively avoided, and the amplified contour needs to be considered, so that the construction safety is ensured.
And further, the ingate is broken, the manual hand-held pneumatic pick is adopted for breaking, the broken slag is broken gradually from outside to inside along the excavation contour line, and the broken slag is transported out of the tunnel at any time.
It can be appreciated that the risk of collapse of the opening is minimized.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A construction method for removing and reinforcing a key technology of a ingate is characterized by comprising the following steps:
plugging the hole and reserving a grouting hole and an exhaust hole before grouting the large pipe shed;
the steel door frame is vertically installed, and flange plate bolts at the joint of each unit of the door frame are effectively connected and installed by adopting bolts or welded; two steel beams of the door frame are welded and connected into a whole; when the door frame is installed, chiseling off the part of the installation area to spray concrete, exposing the primary support steel frame, and connecting the primary support steel frame with the steel frame by plug welding;
measuring and accurately releasing a contour line before the ingate is broken, taking the space of the I-shaped steel into consideration, and gradually breaking the contour line from top to bottom by manually holding a pneumatic pick;
and arranging and erecting a steel frame at the position of the horse head door.
2. The horsehead door breaking and reinforcing key technology construction method according to claim 1, characterized in that the large pipe shed is made of phi 108 steel pipe raw materials with the length of 6m, is arranged along the circumference of 300mm of the outer edge of an excavation contour line in a circumferential mode, is arranged at the circumferential distance of 300mm and the longitudinal length of 9m, and is arranged along the 130-degree excavation range of a channel arch.
3. The horsehead door breaking and reinforcing key technology construction method according to claim 2, characterized in that the large pipe shed is formed by drilling phi 10mm small holes in the pipe wall within a range of 6m at the front end, and the small holes are arranged in a quincunx shape of @200mm x 200 mm; wherein, the wire tube is lengthened by 3m +6m, and the joints are arranged in a staggered way.
4. The horsehead door breaking and reinforcing key technology construction method according to claim 1, characterized in that the hole is plugged and a grouting hole and an exhaust hole are reserved before grouting of the large pipe shed, cement or water glass double-liquid slurry is adopted for grouting of a sandy gravel stratum with water, cement slurry is adopted for an anhydrous or low-water stratum, and grouting pressure is 0.5-1 MPa.
5. The horsehead door breaking and reinforcing key technology construction method according to claim 1, characterized in that the steel door frame is formed by machining double-spliced 20-type steel, is tightly attached to a channel primary support, is provided with 5 connecting plates, is connected with each connecting plate through a flange plate and a bolt, and is installed at the joint of the channel and a large section to protect a cave entrance and prevent surrounding rock deformation.
6. The horsehead door breaking and reinforcing key technology construction method according to claim 1, characterized in that the contour line needs to be provided with allowance for measurement and paying-off.
7. The horsehead door breaking and reinforcing key technology construction method according to claim 1, characterized in that the horsehead door breaking and reinforcing key technology is achieved by adopting a manual hand-held pneumatic pick, the horsehead door is broken and reinforced gradually from outside to inside along an excavation contour line, and broken residues are transported out of a hole at any time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011208564.6A CN112253137A (en) | 2020-11-03 | 2020-11-03 | Construction method for removing and reinforcing key technology of ingate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011208564.6A CN112253137A (en) | 2020-11-03 | 2020-11-03 | Construction method for removing and reinforcing key technology of ingate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112253137A true CN112253137A (en) | 2021-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011208564.6A Pending CN112253137A (en) | 2020-11-03 | 2020-11-03 | Construction method for removing and reinforcing key technology of ingate |
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| Country | Link |
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| CN (1) | CN112253137A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963168A (en) * | 2021-01-29 | 2021-06-15 | 北京交通大学 | Construction method for bridgehead gate of disturbance sensitive stratum ultra-small clear distance large-section group tunnel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203742611U (en) * | 2013-07-08 | 2014-07-30 | 北京城建设计发展集团股份有限公司 | Strengthening supporting structure for opening ingate on side wall of tunnel under preliminary supporting condition |
| CN106050266A (en) * | 2016-07-22 | 2016-10-26 | 中铁建大桥工程局集团第五工程有限公司 | Construction method for undermining connected channel between shield sections in water-rich sand cobble stratum tunnel |
| CN108331587A (en) * | 2018-03-05 | 2018-07-27 | 北京市政建设集团有限责任公司 | A kind of transverse passage-way ingate abolishes construction and restructuring bankrupt |
| CN211230507U (en) * | 2019-10-17 | 2020-08-11 | 中铁第四勘察设计院集团有限公司 | Ingate side wall supporting structure |
-
2020
- 2020-11-03 CN CN202011208564.6A patent/CN112253137A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203742611U (en) * | 2013-07-08 | 2014-07-30 | 北京城建设计发展集团股份有限公司 | Strengthening supporting structure for opening ingate on side wall of tunnel under preliminary supporting condition |
| CN106050266A (en) * | 2016-07-22 | 2016-10-26 | 中铁建大桥工程局集团第五工程有限公司 | Construction method for undermining connected channel between shield sections in water-rich sand cobble stratum tunnel |
| CN108331587A (en) * | 2018-03-05 | 2018-07-27 | 北京市政建设集团有限责任公司 | A kind of transverse passage-way ingate abolishes construction and restructuring bankrupt |
| CN211230507U (en) * | 2019-10-17 | 2020-08-11 | 中铁第四勘察设计院集团有限公司 | Ingate side wall supporting structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963168A (en) * | 2021-01-29 | 2021-06-15 | 北京交通大学 | Construction method for bridgehead gate of disturbance sensitive stratum ultra-small clear distance large-section group tunnel |
| CN112963168B (en) * | 2021-01-29 | 2022-04-01 | 北京交通大学 | Construction method for bridgehead gate of disturbance sensitive stratum ultra-small clear distance large-section group tunnel |
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| PB01 | Publication | ||
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Application publication date: 20210122 |
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