CN112726440B - Shed tunnel structure suitable for turning zone and construction method thereof - Google Patents
Shed tunnel structure suitable for turning zone and construction method thereof Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
- E01F7/04—Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
- E01F7/045—Devices specially adapted for protecting against falling rocks, e.g. galleries, nets, rock traps
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Abstract
The invention provides a shed tunnel structure suitable for turning zones and a construction method thereof, wherein the shed tunnel structure comprises shed tunnel sub-units for vehicles and pedestrians to pass through; the shed tunnel sub-unit comprises a middle fixing unit, a left sliding unit and a right sliding unit, the left sliding unit and the right sliding unit are both connected with the middle fixing unit in a sliding mode, the sliding directions of the left sliding unit and the right sliding unit are opposite, the length of the shed tunnel sub-unit can be prolonged or shortened when the left sliding unit and the right sliding unit slide, and the ends, far away from the center of the middle fixing unit, of the left sliding unit and the right sliding unit are inclined planes; the shed tunnel subunits are multiple, and the inclined planes of the shed tunnel subunits can be sequentially spliced into the arched shed tunnel along the road direction. By adopting the scheme, the functions of rush-to-pass and traffic-protection can be achieved, the disaster processing speed is high, the curve section with the hidden danger of block dropping or landslide on the mountain road can be quickly assembled and is suitable for various curve radius sections.
Description
Technical Field
The invention relates to the field of road traffic emergency rescue, in particular to a shed tunnel structure suitable for turning zones and a construction method thereof.
Background
The mountain highway is often the only passageway in business turn over mountain area, and it is crucial that the traffic is protected smoothly, and rainy season comes this year, receives the influence of continuous rainfall, and mountain highway slope change rockfall, landslide frequently occur in areas such as four chuan's aba, nine village ditches, has caused great economic loss even casualties. All levels of transportation and transportation departments ensure smooth traffic in the disaster area and construct a strong 'life line' in the disaster area. After a disaster happens, temporary measures of cleaning accumulation bodies on the road side and manually observing hidden danger sections with smaller risks are often adopted to ensure the smoothness of the road; for the section with larger rock fall and landslide risks, permanent engineering measures such as slope reinforcement or open shed tunnel construction (or both) must be taken. However, the permanent engineering measures require a certain long construction period, cannot meet the requirement of ensuring smooth traffic in rainy seasons, and the prefabricated reusable steel shed tunnel is a good choice. However, the traditional cuboid open shed tunnel cannot be tightly spliced in a turning section, and hidden danger that falling rocks or landslides invade a road from splicing gaps still exists. In addition, if the steel hangar tunnel units are prefabricated according to the turning curve, different steel hangar tunnel units are required to be adopted in the face of different turning radii, resulting in an increase in investment.
Disclosure of Invention
The invention aims to solve the problems and provides a shed tunnel structure suitable for turning zones and a construction method thereof.
The technical scheme adopted by the invention is as follows: a shed tunnel structure suitable for turning zones comprises a shed tunnel sub-unit for vehicles and pedestrians to pass through;
the shed tunnel subunit comprises a middle fixing unit, a left sliding unit and a right sliding unit, the left sliding unit and the right sliding unit are both connected with the middle fixing unit in a sliding mode, the sliding directions of the left sliding unit and the right sliding unit are opposite, the length of the shed tunnel subunit can be prolonged or shortened when the left sliding unit and the right sliding unit slide, and the ends, far away from the center of the middle fixing unit, of the left sliding unit and the right sliding unit are inclined planes;
the shed tunnel subunits are multiple, and the inclined planes of the shed tunnel subunits can be sequentially spliced into the arched shed tunnel along the road direction.
When the scheme is operated, the shed tunnel subunit comprises a middle fixing unit, a left sliding unit and a right sliding unit, wherein the middle fixing unit is preferably a rectangular cube with two open ends, the left sliding unit and the right sliding unit are preferably right trapezoid cubes and can be passed through by vehicles and pedestrians, the left sliding unit and the right sliding unit are slightly smaller than the middle fixing unit in size, the left sliding unit can be inserted into one end of the middle fixing unit and is in sliding connection with the middle fixing unit, the right sliding unit can be inserted into the other end of the middle fixing unit and is in sliding connection with the middle fixing unit, the left sliding unit and the right sliding unit can slide relatively at the moment, the length of the left sliding unit and the right sliding unit is preferably equal to the length of the middle fixing unit, and when the left sliding unit and the right sliding unit slide to the longest length or shrink to the shortest length, the length of the whole shed tunnel subunit can be optimized, and the longest length and the shortest length can be simultaneously met; the left side sliding unit and the right side sliding unit are both inclined planes at the ends far away from the center of the middle fixing unit, and the inclined planes are used for sequentially overlapping the inclined planes of the shed tunnel sub-units along the direction of a curved road when the road is curved to form an arched shed tunnel; secondly, the scheme can also be applied to a straight line section, the shed tunnel subunits are completely unfolded firstly, then the shed tunnel subunits are spliced with the previous shed tunnel subunit after being rotated by 180 degrees, and finally the two units are regarded as a combined structure and are sequentially connected with all the combined structures.
Further preferably, the left and right sliding units are symmetrically disposed about the middle fixing unit.
When this scheme specifically operates, for making this device concatenation convenient, and can prefabricate fast, need to make left side slip unit and right side slip unit length equal, and left side slip unit and right side slip unit stretch to the longest or shrink to the shortest time, can be about the fixed unit symmetry setting in middle part.
Further optimized, to know the stretched length of the left side sliding unit and the right side sliding unit, the following settings are made: and marking scales are marked on the two sides of the left side sliding unit and the right side sliding unit.
Further optimize, the sliding mode that left side slip unit and right side slip unit all with middle part fixed cell sliding connection is: and the sliding connection is realized by adopting a pulley and a sliding groove.
Further preferably, the middle fixing unit, the left sliding unit and the right sliding unit are made of steel materials.
Further optimizing, the construction method of the shed tunnel structure suitable for the turning zone comprises the following steps:
s1: prefabricating a plurality of shed tunnel subunits in a factory, and determining the maximum curve radius R suitable for each shed tunnel subunitmaxAnd minimum curve radius Rmin；
S2: when an accident occurs on a road, a plurality of shed tunnel subunits are quickly transported to the site, and the bending radius R of the road accident section is measuredxWherein R ismin<Rx<Rmax；
S3: and sequentially overlapping the inclined planes of the selected shed tunnel subunits along the road direction to form an arched shed tunnel.
Further optimization is carried out according to the inclined angle theta of each shed tunnel subunit inclined plane and the maximum length L of each shed tunnel subunit when the shed tunnel subunits are completely unfoldedGeneral assemblyTo determine the maximum curve radius R applicable to each shed tunnel subunitmax。
Further optimization is carried out according to the inclined angle theta of each shed tunnel subunit inclined plane and the minimum length L when the shed tunnel subunits are completely contractedXTo determine the minimum curve radius R applicable to each shed tunnel subunitmin。
Further preferably, the step S3 further includes the following sub-steps: when a plurality of shed tunnel subunits are spliced in sequence, the shed tunnel subunits are symmetrically pulled open to ensure that the curve radius of the shed tunnel subunits is equal to the bending radius RxFinally, an arched shed tunnel is formed.
Further preferably, the middle fixing unit, the left sliding unit and the right sliding unit are made of steel materials.
The principle of the scheme is as follows: firstly, prefabricating a plurality of shed tunnel subunits in a factory, and determining the maximum curve radius R suitable for each shed tunnel subunitmaxAnd minimum curve radius RminWherein the curve radius can be easily calculated by knowing the included angle and the length according to the formula in the prior art, and the included angle theta of the inclined surface of each shed tunnel subunit and the maximum length of the inclined surface when the shed tunnel subunit is completely unfoldedLGeneral assemblyTo determine the maximum curve radius R applicable to each shed tunnel subunitmax(ii) a According to the inclined angle theta of each shed tunnel subunit inclined plane and the minimum length L when the shed tunnel subunit is completely contractedXTo determine the minimum curve radius R applicable to each shed tunnel subunitminOr a plurality of shed tunnel subunits are spliced in a factory, and the maximum curve radius R is measured on sitemaxAnd minimum curve radius RminAnd are marked on the respective shed tunnel subunit; when accidents happen to roads, the shed tunnel sub-units are quickly transported to the site, and when the prefabricated steel shed tunnel structural units are stored and transported, the left and right sliding units are collected into the middle fixed unit, so that the storage space is reduced and the transportation efficiency is increased; after the shed tunnel is transported to the site, if the section of the accident is a straight section, the shed tunnel subunit can be directly and completely unfolded, then the shed tunnel subunit is rotated by 180 degrees to be spliced with the previous shed tunnel subunit, and finally the two units are regarded as a combined structure and are sequentially connected with all the combined structures; if the accident road is a curved road section, the curve radius R of the road accident section needs to be measured on sitex(ii) a Measuring the bending radius RxThen, the bending radius R is selected immediatelyxThe value lying at its maximum curve radius RmaxAnd minimum curve radius RminIn between shed-hole subunits, i.e. Rmin<Rx<RmaxAfter the shed tunnel subunits are selected, the length of each shed tunnel subunit is extended to the bending radius RxCorresponding scale is made to just meet the bending radius RxFinally, the inclined planes of the selected shed tunnel subunits are sequentially overlapped along the bending direction of the road to form an arched shed tunnel; the arched shed tunnel is mainly used for preventing falling rocks, so that the middle fixing unit, the left sliding unit and the right sliding unit are made of steel materials; after the hidden trouble road sections are processed, the undamaged shed tunnel subunits are recovered for next use or are reused in other hidden trouble road sections.
The invention has the following beneficial effects:
this scheme provides a shed tunnel structure suitable for turn area and construction method thereof, adopt this scheme, can reach to rob to lead to, protect to lead to the function and have stronger adaptability and the quick disaster processing speed's novel steel shed tunnel structure, the curve highway section of piece or landslide hidden danger falls in the mountain area highway, can assemble fast and be applicable to multiple curve radius highway section, compare in ordinary steel construction shed tunnel prefabricated unit can effectively prevent falling rocks from connecting the gap and invading the road surface, compare in the curve steel construction shed tunnel unit of customization and have faster disaster processing speed.
Drawings
FIG. 1 is a top view of a shed tunnel structure suitable for turning zones and a construction method thereof, in which a shed tunnel subunit is completely contracted, according to the present invention;
FIG. 2 is a top view of a shed tunnel sub-unit fully deployed, according to the present invention, for a turning zone and a construction method thereof;
FIG. 3 is a top view of a shed tunnel structure suitable for turning zones and a construction method thereof according to the present invention, wherein a plurality of shed tunnel sub-units are spliced together and completely contracted;
FIG. 4 is a top view of a shed tunnel structure suitable for turning zones and a construction method thereof, wherein a plurality of shed tunnel sub-units are spliced with each other and are completely unfolded.
The reference numbers in the figures are: 1-middle fixed unit, 2-left sliding unit, and 3-right sliding unit.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example (b): a shed tunnel structure suitable for turning zones comprises a shed tunnel sub-unit for vehicles and pedestrians to pass through;
the shed tunnel subunit comprises a middle fixing unit 1, a left sliding unit 2 and a right sliding unit 3, wherein the left sliding unit 2 and the right sliding unit 3 are both connected with the middle fixing unit 1 in a sliding manner, the sliding directions of the left sliding unit 2 and the right sliding unit 3 are opposite, the length of the shed tunnel subunit can be prolonged or contracted when the left sliding unit 2 and the right sliding unit 3 slide, and the ends of the left sliding unit 2 and the right sliding unit 3, which are far away from the center of the middle fixing unit 1, are inclined planes;
the shed tunnel subunits are multiple, and the inclined planes of the shed tunnel subunits can be sequentially spliced into the arched shed tunnel along the road direction.
In this embodiment, the hangar cave subunit comprises a middle fixing unit 1, a left sliding unit 2 and a right sliding unit 3, wherein the middle fixing unit 1 is preferably a rectangular cube with two open ends, the left sliding unit 2 and the right sliding unit 3 are preferably right-angled trapezoidal cubes and are used for vehicles and pedestrians to pass through, the left sliding unit 2 and the right sliding unit 3 are both slightly smaller than the middle fixing unit 1 in size, so that the left sliding unit 2 can be inserted into one end of the middle fixing unit 1 and is slidably connected with the middle fixing unit 1, the right sliding unit 3 can be inserted into the other end of the middle fixing unit 1 and is slidably connected with the middle fixing unit 1, at this time, the left sliding unit 2 and the right sliding unit 3 can slide relatively, the sum of the length of the left sliding unit 2 and the right sliding unit 3 is preferably equal to the length of the middle fixing unit 1, when the left sliding unit 2 and the right sliding unit 3 slide to the longest length or shrink to the shortest length, the length of the whole shed tunnel subunit can be optimized, and the longest length and the shortest length can be met simultaneously; the ends, far away from the center of the middle fixing unit 1, of the left sliding unit 2 and the right sliding unit 3 are inclined planes, and the inclined planes are used for enabling the inclined planes of the shed tunnel sub-units to be sequentially overlapped along the direction of a curved road when the road is curved to form an arched shed tunnel; secondly, the scheme can also be applied to a straight line section, the shed tunnel subunits are completely unfolded firstly, then the shed tunnel subunits are spliced with the previous shed tunnel subunit after being rotated by 180 degrees, and finally the two units are regarded as a combined structure and are sequentially connected with all the combined structures.
In this embodiment, for making this device concatenation convenient, and can prefabricate fast, need to make left side slip unit 2 and 3 length of right side slip unit equal, and left side slip unit 2 and right side slip unit 3 stretch to the longest or shrink to the shortest time, can be about the symmetrical setting of middle part fixed cell 1.
In the present embodiment, to know the length of the left slide unit 2 and the right slide unit 3 to be stretched, the following are set: and marking scales are marked on the two sides of the left sliding unit 2 and the right sliding unit 3.
In this embodiment, the sliding modes of the left sliding unit 2 and the right sliding unit 3, which are both slidably connected with the middle fixing unit 1, are as follows: and the sliding connection is realized by adopting a pulley and a sliding groove.
In this embodiment, the middle fixing unit 1, the left sliding unit 2, and the right sliding unit 3 are made of steel.
In this embodiment, a construction method of a shed tunnel structure suitable for a turning zone includes the following steps:
s1: prefabricating a plurality of shed tunnel subunits in a factory, and determining the maximum curve radius R suitable for each shed tunnel subunitmaxAnd minimum curve radius Rmin；
S2: when an accident occurs on a road, a plurality of shed tunnel subunits are quickly transported to the site, and the bending radius R of the road accident section is measuredxWherein R ismin<Rx<Rmax；
S3: and sequentially overlapping the inclined planes of the selected shed tunnel subunits along the road direction to form an arched shed tunnel.
In this embodiment, the inclination angle θ of each shed tunnel subunit slope and the maximum length L of each shed tunnel subunit when the shed tunnel subunit slope is completely unfolded need to be determinedGeneral assemblyDetermine the maximum curve radius R applicable to each shed tunnel subunitmax。
In this embodiment, the inclination angle θ of each shed tunnel subunit slope and the minimum length L of each shed tunnel subunit when the shed tunnel subunit slope is completely contracted need to be determinedXTo determine the minimum curve radius R applicable to each shed tunnel subunitmin。
In this embodiment, the step S3 further includes the following sub-steps: when a plurality of shed tunnel subunits are spliced in sequence, the shed tunnel subunits are symmetrically pulled open to ensure that the curve radius of the shed tunnel subunits is equal to the bending radius RxFinally, an arched shed tunnel is formed.
In this embodiment, the middle fixing unit 1, the left sliding unit 2, and the right sliding unit 3 are made of steel.
In this embodiment, the technical scheme adopted is as follows: (1) the prefabricated steel shed tunnel structural unit consists of three parts: a left sliding unit 2, a middle fixing unit 1 and a right sliding unit 3; the left sliding unit and the right sliding unit are symmetrical about the center line of the steel frame and are both in a right-angled trapezoid structure, and the middle fixing unit 1 is in a rectangular structure; the left and right sliding units are connected with the middle fixing unit 1 through a pulley and chute structure and are slightly smaller than the middle fixing unit 1 in cross section, so that the left and right sliding units can be pushed into the middle fixing unit 1 or pulled out of the middle fixing unit 1.
(2) The maximum curve radius R suitable for the unit is determined by controlling the angle theta of the inclined sides of the trapezoidal structures of the left and right sliding units and the total length L of the unit when the trapezoidal structures are completely unfoldedmaxKeeping the angle of the hypotenuse of the trapezium structure constant, the minimum curve radius R for the intermediate fixed unit 1 is determined by controlling the length L of the unitmin。
(3) Slide unit outside mark pull-out length LXCorresponding applicable radius Rx(Rmin<Rx<Rmax) (ii) a During practical use, the curve radius of the hidden danger road section is found according to design data, and the left sliding unit and the right sliding unit are symmetrically pulled out to the corresponding scales and then spliced.
(4) When the steel shed tunnel structure unit is used in a straight line section, the steel shed tunnel structure unit is completely unfolded, then the steel shed tunnel structure unit is rotated by 180 degrees in a plane and spliced with the previous unit, and finally the two units are regarded as a combined structure and are sequentially connected with all the combined structures.
(5) When storing and transporting the prefabricated steel hangar tunnel structural unit, the left and right sliding sub-units are collected into the middle fixing unit 1 to reduce the storage space and increase the transportation efficiency.
(6) And after the hidden danger road sections are processed, the undamaged steel shed tunnel structural units are recovered for next use or are reused in other hidden danger road sections.
The principle of the scheme is as follows: firstly, prefabricating a plurality of shed-hole subunits in a factory, and determining the maximum curvature applicable to each shed-hole subunitRadius of line RmaxAnd minimum curve radius RminWherein the curve radius can be easily calculated by knowing the included angle and the length according to the formula in the prior art, and the included angle theta of the inclined surface of each shed tunnel subunit and the maximum length L of the inclined surface when the shed tunnel subunit is completely unfolded are requiredGeneral assemblyDetermine the maximum curve radius R applicable to each shed tunnel subunitmax(ii) a According to the inclined angle theta of each shed tunnel subunit inclined plane and the minimum length L when the shed tunnel subunit is completely contractedXTo determine the minimum curve radius R applicable to each shed tunnel subunitminOr a plurality of shed tunnel subunits are spliced in a factory, and the maximum curve radius R is measured on sitemaxAnd minimum curve radius RminAnd are marked on the respective shed tunnel subunit; when accidents happen to roads, a plurality of shed tunnel sub-units are rapidly transported to the site, and when the prefabricated steel shed tunnel structural units are stored and transported, the left and right sliding units 3 are collected into the middle fixed unit, so that the storage space is reduced and the transportation efficiency is increased; after the shed tunnel is transported to the site, if the section of the accident is a straight section, the shed tunnel subunit can be directly and completely unfolded, then the shed tunnel subunit is rotated by 180 degrees to be spliced with the previous shed tunnel subunit, and finally the two units are regarded as a combined structure and are sequentially connected with all the combined structures; if the accident road is a curved road section, the curve radius R of the road accident section needs to be measured on sitex(ii) a Measuring the bending radius RxThen, the bending radius R is selected immediatelyxThe value lying at its maximum curve radius RminAnd minimum curve radius RminIn between shed-hole subunits, i.e. Rmin<Rx<RmaxAfter the shed tunnel subunits are selected, the length of each shed tunnel subunit is extended to the bending radius RxCorresponding scale is made to just meet the bending radius RxFinally, the inclined planes of the selected shed tunnel subunits are sequentially overlapped along the bending direction of the road to form an arched shed tunnel; the arched shed tunnel is mainly used for preventing falling rocks, so the middle fixing unit 1, the left sliding unit 2 and the right sliding unit 3 are made of steel materials; after the hidden trouble road sections are processed, the undamaged shed tunnel subunits are recovered for later useAnd the next time the hidden road sections are used or reapplied.
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 (10)
1. A shed tunnel structure suitable for turning zones is characterized by comprising a shed tunnel subunit for vehicles and pedestrians to pass through;
the shed tunnel subunit comprises a middle fixing unit (1), a left sliding unit (2) and a right sliding unit (3), wherein the left sliding unit (2) and the right sliding unit (3) are both connected with the middle fixing unit (1) in a sliding manner, the sliding directions of the left sliding unit (2) and the right sliding unit (3) are opposite, the length of the shed tunnel subunit can be prolonged or contracted when the left sliding unit (2) and the right sliding unit (3) slide, and the ends, far away from the center of the middle fixing unit (1), of the left sliding unit (2) and the right sliding unit (3) are inclined planes;
the shed tunnel subunits are multiple, and the inclined planes of the shed tunnel subunits can be sequentially spliced into the arched shed tunnel along the road direction.
2. A shed tunnel structure suitable for turning terrain as claimed in claim 1, characterized in that the left-hand slider unit (2) and the right-hand slider unit (3) are arranged symmetrically with respect to the central fixed unit (1).
3. A shed tunnel structure suitable for turning terrain as claimed in claim 1, characterized in that the left-hand slider unit (2) and the right-hand slider unit (3) are marked on both sides with a scale.
4. A shed tunnel structure suitable for turning terrain as claimed in claim 1, characterized in that the sliding mode of the left side sliding unit (2) and the right side sliding unit (3) with the middle fixed unit (1) is: and the sliding connection is realized by adopting a pulley and a sliding groove.
5. A shed tunnel structure suitable for turning terrain as claimed in claim 1, characterized in that the middle fixed unit (1), the left sliding unit (2) and the right sliding unit (3) are all made of steel material.
6. The method for constructing a shed tunnel structure suitable for turning areas according to any one of claims 1 to 5, comprising the steps of:
s1: prefabricating a plurality of shed tunnel subunits in a factory, and determining the maximum curve radius R suitable for each shed tunnel subunitmaxAnd minimum curve radius Rmin；
S2: when an accident occurs on a road, a plurality of shed tunnel subunits are quickly transported to the site, and the bending radius R of the road accident section is measuredxWherein R ismin<Rx<Rmax；
S3: and sequentially overlapping the inclined planes of the selected shed tunnel subunits along the road direction to form an arched shed tunnel.
7. A method as claimed in claim 6, wherein the angle θ of inclination of each shed tunnel sub-unit and the maximum length L of each shed tunnel sub-unit when it is fully deployed are determinedGeneral assemblyTo determine the maximum curve radius R applicable to each shed tunnel subunitmax。
8. A method for constructing a shed tunnel structure suitable for turning areas as claimed in claim 6, wherein the included angle θ of each shed tunnel subunit slope and its minimum length L when it is fully contracted are determinedXTo determine the minimum curve radius R applicable to each shed tunnel subunitmin。
9. A construction method of a shed tunnel structure suitable for turning zones according to claim 6, wherein the step S3 further comprises the following substeps: when a plurality of shed tunnel subunits are spliced in sequence, the shed tunnel subunits are symmetrically pulled open to ensure that the curve radius of the shed tunnel subunits is equal to the bending radius RxFinally, an arched shed tunnel is formed.
10. A construction method of a shed tunnel structure suitable for turning areas according to claim 6, characterized in that the middle fixing unit (1), the left sliding unit (2) and the right sliding unit (3) are made of steel material.
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| KR100813236B1 (en) * | 2007-03-12 | 2008-03-13 | 이평우 | The structure for a slope reinforcement and eco slope reinforcement method |
| US20090090070A1 (en) * | 2007-10-03 | 2009-04-09 | Steven Caffall Finch | Railway arch linings and mezzanine floors |
| CN105649641B (en) * | 2016-02-01 | 2017-12-08 | 中铁十六局集团北京轨道交通工程建设有限公司 | The axial line control method of shield anxious curve construction in upper-soft lower-hard ground |
| CN106089215B (en) * | 2016-06-23 | 2018-08-10 | 中铁十二局集团有限公司 | The parallel pilot tunnel of vcehicular tunnel is into transverse passage-way opening construction method |
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| KR101804166B1 (en) * | 2017-06-30 | 2018-01-10 | 주식회사 케이엔지니어링 | Absorbing device for rockfall prevention nets on slope |
| CN107988926A (en) * | 2017-11-27 | 2018-05-04 | 云南公投建设集团设计研究院有限公司 | A kind of assembled corrugated steel arch shed hole structure |
| CN108894131A (en) * | 2018-08-16 | 2018-11-27 | 中国地质环境监测院 | A kind of quickly emergency hangar tunnel equipment and implementation method |
| CN209509020U (en) * | 2018-12-26 | 2019-10-18 | 中国建筑第七工程局有限公司 | A kind of steel structure telescopic joint system for the anti-seismic performance enhancing pipe gallery |
| CN110821512B (en) * | 2019-11-23 | 2021-01-08 | 中铁二十局集团有限公司 | Loess tunnel entrance opening section pre-reinforcing and excavating construction method passing through landslide body |
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| CN211498507U (en) * | 2019-11-28 | 2020-09-15 | 中铁二十局集团第四工程有限公司 | Whole reassembling type protection rack |
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