CN112593948A - Construction method of escape ventilation shaft in shield electric tunnel interval - Google Patents
Construction method of escape ventilation shaft in shield electric tunnel interval Download PDFInfo
- Publication number
- CN112593948A CN112593948A CN202011502440.9A CN202011502440A CN112593948A CN 112593948 A CN112593948 A CN 112593948A CN 202011502440 A CN202011502440 A CN 202011502440A CN 112593948 A CN112593948 A CN 112593948A
- Authority
- CN
- China
- Prior art keywords
- escape
- shaft
- tunnel
- shield electric
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009423 ventilation Methods 0.000 title claims abstract description 39
- 238000010276 construction Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000005641 tunneling Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 5
- 239000011178 precast concrete Substances 0.000 claims abstract description 4
- 238000001556 precipitation Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/08—Sinking shafts while moving the lining downwards
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/10—Preparation of the ground
- E21D1/105—Preparation of the ground by water level modification
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/10—Preparation of the ground
- E21D1/16—Preparation of the ground by petrification
-
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/155—Laggings made of strips, slats, slabs or sheet piles
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
-
- 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
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a construction method of an escape ventilation shaft in a shield electric power tunnel interval, which mainly comprises the following steps of (1) tunneling a shield electric power tunnel, replacing a top B type segment in a precast concrete segment with a detachable steel segment at the preset area of the escape shaft and the ventilation shaft in the shield electric power tunnel interval, and continuously tunneling without influencing the construction period; (2) synchronously positioning the positions of an escape shaft and a ventilation shaft on the ground, sinking a prefabricated pipe shaft or a steel casing to a position which is about 0.3-0.5 m away from the top of the shield electric tunnel by using a sinking well method at the position, and synchronously adopting a point-position precipitation or local advanced grouting water stop structure; (3) manually excavating the final connecting section of the shield electric power tunnel, welding steel bars on a steel pipe piece at the top of the tunnel, and integrally pouring the connecting section to ensure a water stopping effect; (4) cutting or chiseling the reserved manhole of the steel pipe piece to form an escape channel and a ventilation channel with the open caisson pipeline; the method has the characteristics of flexible arrangement, effective reduction of investment and corridor width and the like.
Description
Technical Field
The invention relates to the field of civil construction, in particular to a construction method of an escape ventilation shaft in a shield electric power tunnel interval.
Background
With the comprehensive development of the current new infrastructure of the country, the construction scale of underground electric power tunnels in the field of power grid construction is further increased, and according to the requirements in ' power cable tunnel design regulations ' DL/T5484-2013 that the distance between personnel exits and entrances is not more than 200m and the distance between underground excavated tunnels can be properly increased ', one escape ventilation combined well is generally arranged in a distance of 300m in the overall arrangement, so that the following two technical problems exist at present:
1) the engineering construction cost is high. Taking an escape ventilation shaft of a certain electric power tunnel as an example, the internal dimension of the escape ventilation shaft is 8.0m in width, 12.0m in length and 16.75m in depth, and the construction cost of open caisson construction and civil engineering is about 850 ten thousand yuan. If the length of the conventional electric power tunnel interval is 1.5km, and an escape ventilation shaft is built at an interval of 300m, 4 escape ventilation shafts are needed, the corresponding civil engineering index is 2.4 ten thousand yuan/m, and the cost ratio of the escape ventilation shaft to the shield electric power tunnel body is 2.4: 4.0=0.6:1.0, high ratio and higher construction cost.
2) Occupies a large width of the underground corridor. Taking a common electric power tunnel as an example, the outer diameter of the common electric power tunnel is 4.0m, namely the tunnel body is 4.0m of gallery width, while the outer width of the structure of the conventional escape ventilating shaft is 10.0m, the gallery with the width of 10.0m is actually needed, and considering the influence range, the gallery occupies a larger width, so that the construction contradiction is increasingly prominent under the increasingly tense urban underground space condition, and the application scene of the underground excavation type electric power tunnel is hindered.
Therefore, a new technical scheme is needed for the escape ventilation shaft in the shield electric power tunnel interval to overcome the defects of large investment and large occupied area in the conventional arrangement of the escape ventilation shaft.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a construction method of an escape ventilation shaft in a shield electric power tunnel interval, which is flexible in arrangement and can effectively reduce investment, aiming at the defects in the prior art.
The invention aims to complete the construction method of the escape ventilation shaft in the shield electric tunnel section by adopting the following technical scheme, which mainly comprises the following steps:
(1) tunneling a shield electric power tunnel, replacing a top B type segment in a precast concrete segment with a detachable steel segment at preset areas of an escape shaft and a ventilation shaft in an electric power tunnel section, and continuously tunneling without influencing the construction period;
(2) synchronously positioning the positions of an escape shaft and a ventilation shaft on the ground, sinking a prefabricated pipe shaft or a steel casing to a position which is about 0.3-0.5 m away from the top of the shield electric tunnel by using a sinking well method at the position, and synchronously adopting a point-position precipitation or local advanced grouting water stop structure;
(3) manually excavating the final connecting section of the shield electric power tunnel, welding steel bars on a steel pipe piece at the top of the tunnel, and integrally pouring the connecting section to ensure a water stopping effect;
(4) and cutting or chiseling the reserved manhole of the steel pipe piece to form an escape channel and a ventilation channel with the open caisson pipeline.
Further, in the step (1), an escape shaft and a ventilation shaft preset area are arranged in the shield electric power tunnel every 300m, and the steel duct piece is a steel shield duct piece or a steel fiber concrete duct piece.
Further, the inner diameter of the prefabricated pipe well or the steel casing in the step (2) is not less than 1.20 m.
The invention has the beneficial technical effects that: 1) the investment is reduced. The invention has the advantages that the construction is only carried out in the transverse width of the corridor, the additional floor occupation is not needed, the construction cost is as low as about 80 ten thousand per seat, 4 escape wells and 3 ventilation wells are needed by calculating the length of a conventional interval of 1.5km, the investment for the approximate calculation is 0.37 ten thousand yuan/m, and the approximate calculation cost index is respectively reduced by 84 percent compared with the method of the conventional escape ventilation combined well;
2) the corridor width is reduced. The width of the escape ventilator is smaller than that of the electric power tunnel, the occupied area is not increased, the width outside the conventional escape ventilation shaft is 10.0m at present, the occupied width of the escape ventilator is reduced by 6.5m in the whole area compared with the occupied width of a corridor, the corridor width is reduced by 65%, the environment friendliness is realized, and the application of the electric power tunnel in the urban complex environment is promoted.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the construction method of the escape ventilation shaft in the shield electric tunnel zone mainly comprises the following steps:
(1) tunneling a shield electric power tunnel, replacing a top B type segment in a precast concrete segment with a detachable steel segment at preset areas of an escape shaft and a ventilation shaft in an electric power tunnel section, and continuously tunneling without influencing the construction period;
(2) synchronously positioning the positions of an escape shaft and a ventilation shaft on the ground, sinking a prefabricated pipe shaft or a steel casing to a position which is about 0.3-0.5 m away from the top of the shield electric tunnel by using a sinking well method at the position, and synchronously adopting a point-position precipitation or local advanced grouting water stop structure;
(3) manually excavating the final connecting section of the shield electric power tunnel, welding steel bars on a steel pipe piece at the top of the tunnel, and integrally pouring the connecting section to ensure a water stopping effect;
(4) and cutting or chiseling the reserved manhole of the steel pipe piece to form an escape channel and a ventilation channel with the open caisson pipeline.
In the step (1), an escape shaft and a ventilation shaft preset area are arranged in the shield electric power tunnel every 300m, and the steel duct piece is a steel shield duct piece or a steel fiber concrete duct piece. The inner diameter of the prefabricated pipe well or the steel casing in the step (2) is not less than 1.20 m.
The miniaturized ventilating shaft for escaping in the shield electric power tunnel interval overcomes the defects of large investment and large occupied area of the conventional ventilating shaft for escaping, embodies good economic benefits and land and environment resource saving benefits, does not influence a stress strain structure under the condition of external load of the electric power tunnel, and can be widely applied to the field of shield electric power tunnel construction.
The invention has the advantages that the construction is only carried out in the transverse width of the corridor, the additional floor occupation is not needed, the construction cost is as low as about 80 ten thousand per seat, 4 escape wells and 3 ventilation wells are needed by calculating the length of a conventional interval of 1.5km, the investment for the approximate calculation is 0.37 ten thousand yuan/m, and the approximate calculation cost index is respectively reduced by 84 percent compared with the method of the conventional escape ventilation combined well; the width of the escape ventilator is smaller than that of the electric power tunnel, the occupied area is not increased, the width outside the conventional escape ventilation shaft is 10.0m at present, the occupied width of the escape ventilator is reduced by 6.5m in the whole area compared with the occupied width of a corridor, the corridor width is reduced by 65%, the environment friendliness is realized, and the application of the electric power tunnel in the urban complex environment is promoted.
In addition, the principle of the invention can be used for reference and implementation of the top-pipe electric power tunnel, and the method is to locally increase an entire ring of steel pipelines.
The specific embodiments described herein are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (3)
1. A construction method of an escape ventilation shaft in a shield electric tunnel interval is characterized by comprising the following steps: the method mainly comprises the following steps:
(1) tunneling a shield electric power tunnel, replacing a top B type segment in a precast concrete segment with a detachable steel segment at preset areas of an escape shaft and a ventilation shaft in an electric power tunnel section, and continuously tunneling without influencing the construction period;
(2) synchronously positioning the positions of an escape shaft and a ventilation shaft on the ground, sinking a prefabricated pipe shaft or a steel casing to a position which is about 0.3-0.5 m away from the top of the shield electric tunnel by using a sinking well method at the position, and synchronously adopting a point-position precipitation or local advanced grouting water stop structure;
(3) manually excavating the final connecting section of the shield electric power tunnel, welding steel bars on a steel pipe piece at the top of the tunnel, and integrally pouring the connecting section to ensure a water stopping effect;
(4) and cutting or chiseling the reserved manhole of the steel pipe piece to form an escape channel and a ventilation channel with the open caisson pipeline.
2. The construction method of the escape ventilation shaft in the shield electric tunnel section according to claim 1, characterized in that: in the step (1), an escape shaft and a ventilation shaft preset area are arranged in the shield electric power tunnel every 300m, and the steel duct piece is a steel shield duct piece or a steel fiber concrete duct piece.
3. The construction method of the escape ventilation shaft in the shield electric tunnel section according to claim 1 or 2, characterized in that: the inner diameter of the prefabricated pipe well or the steel casing in the step (2) is not less than 1.20 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011502440.9A CN112593948A (en) | 2020-12-18 | 2020-12-18 | Construction method of escape ventilation shaft in shield electric tunnel interval |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011502440.9A CN112593948A (en) | 2020-12-18 | 2020-12-18 | Construction method of escape ventilation shaft in shield electric tunnel interval |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112593948A true CN112593948A (en) | 2021-04-02 |
Family
ID=75199439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011502440.9A Pending CN112593948A (en) | 2020-12-18 | 2020-12-18 | Construction method of escape ventilation shaft in shield electric tunnel interval |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112593948A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566067A (en) * | 2009-06-03 | 2009-10-28 | 北京首钢国际工程技术有限公司 | Entire-underground cable tunnel safety manhole being used also as ventilation shaft |
| CN103742154A (en) * | 2013-12-31 | 2014-04-23 | 中交第二航务工程局有限公司 | Shield tunnel ventilation shaft construction method |
| CN105714746A (en) * | 2016-02-26 | 2016-06-29 | 四川大学 | Pressure slope type ventilation shaft used for mid-gate chamber in high-water-head flood discharging tunnel |
| CN110374657A (en) * | 2019-08-16 | 2019-10-25 | 中铁西安勘察设计研究院有限责任公司 | The Mining Method Subway Tunnel ventilating shaft and its construction method of " well after first shield " |
| CN110714765A (en) * | 2019-09-23 | 2020-01-21 | 中铁隧道集团一处有限公司 | Construction method for post-construction air shaft of shield interval |
| CN111101956A (en) * | 2019-12-26 | 2020-05-05 | 北京城建设计发展集团股份有限公司 | Secondary starting method for shield in single-hole single-line underground excavation tunnel |
-
2020
- 2020-12-18 CN CN202011502440.9A patent/CN112593948A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566067A (en) * | 2009-06-03 | 2009-10-28 | 北京首钢国际工程技术有限公司 | Entire-underground cable tunnel safety manhole being used also as ventilation shaft |
| CN103742154A (en) * | 2013-12-31 | 2014-04-23 | 中交第二航务工程局有限公司 | Shield tunnel ventilation shaft construction method |
| CN105714746A (en) * | 2016-02-26 | 2016-06-29 | 四川大学 | Pressure slope type ventilation shaft used for mid-gate chamber in high-water-head flood discharging tunnel |
| CN110374657A (en) * | 2019-08-16 | 2019-10-25 | 中铁西安勘察设计研究院有限责任公司 | The Mining Method Subway Tunnel ventilating shaft and its construction method of " well after first shield " |
| CN110714765A (en) * | 2019-09-23 | 2020-01-21 | 中铁隧道集团一处有限公司 | Construction method for post-construction air shaft of shield interval |
| CN111101956A (en) * | 2019-12-26 | 2020-05-05 | 北京城建设计发展集团股份有限公司 | Secondary starting method for shield in single-hole single-line underground excavation tunnel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US12025008B2 (en) | Vertical orthogonal top exhausting air duct structure of deeply-buried subway station and construction method therefor | |
| CN108547639B (en) | Tunnel closes on the advanced same more conduit delamination pour slurry construction methods in hole of existing buildings | |
| Hou et al. | Excavation failure due to pipeline damage during shallow tunnelling in soft ground | |
| CN102182464A (en) | Construction structure and construction method of channel structure | |
| CN112727466A (en) | Construction method for support-free prefabricated assembled type shield tunnel air shaft structure | |
| CN113847040A (en) | Large-span non-column underground station underground excavation construction method | |
| CN112343083A (en) | Phase change concrete rectangular pipe gallery structure and construction method | |
| CN106640155A (en) | Large-span underground space structure and construction method thereof | |
| CN112593948A (en) | Construction method of escape ventilation shaft in shield electric tunnel interval | |
| Ma et al. | Transition of the pipe jacking technology in Japan and investigation of its application status | |
| CN111778983A (en) | Method for constructing foundation pit above existing facility and supporting structure | |
| CN205778882U (en) | Super large section tunnel normal position enlargement construction structures of inside opening increase working face | |
| CN209742908U (en) | Assembled large-section rectangular pipe jacking joint | |
| CN217267334U (en) | Diversion tunnel overhauls hole arrangement structure | |
| CN110005440A (en) | Double side wall pilot tunnel formula construction method under lateral pipe shed support | |
| CN109119943A (en) | System of laying optimization method of the cable at push pipe both ends | |
| CN214273662U (en) | Shield constructs in-connection structure in mine handing-over tunnel | |
| CN214089971U (en) | Water and electricity engineering high tension cable outlet hole export section arrangement structure | |
| JP2893349B2 (en) | Large section tunnel structure and its construction method. | |
| CN211144525U (en) | Water stopping structure of shield tunnel segment in middle air shaft | |
| CN214741349U (en) | Shield constructs section of jurisdiction structure that shield constructs quick-witted thrust city tunnel and prevent section of jurisdiction come-up | |
| CN208718721U (en) | A kind of railway large diameter shield tunnel rail flowering structure of rapid construction | |
| CN111648773A (en) | Construction method of connection channel communicated with existing underground structure of central urban area | |
| CN218844318U (en) | Reinforcing structure of shield underpass risk source | |
| CN201982103U (en) | Construction structure of channel structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210402 |
|
| RJ01 | Rejection of invention patent application after publication |