CN109826120B - Dangerous rock falling rock protection combined stone blocking wall structure and construction method thereof - Google Patents
Dangerous rock falling rock protection combined stone blocking wall structure and construction method thereof Download PDFInfo
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- CN109826120B CN109826120B CN201910160467.5A CN201910160467A CN109826120B CN 109826120 B CN109826120 B CN 109826120B CN 201910160467 A CN201910160467 A CN 201910160467A CN 109826120 B CN109826120 B CN 109826120B
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Abstract
The invention relates to a dangerous rock falling rock protection combined stone blocking wall structure and a construction method thereof, wherein the structure comprises an existing shed tunnel supporting structure at one side of a high steep slope, the existing shed tunnel supporting structure comprises existing pier bodies longitudinally arranged in rows, and existing shed tunnel main beams, auxiliary beams and cover plates above the existing shed tunnel main beams, the newly-built pier bodies are longitudinally arranged between the existing pier bodies along a line, longitudinal horizontal longitudinal beams are arranged above the newly-built pier bodies, horizontal cross beams are arranged perpendicular to the horizontal longitudinal beams to the side of a backer, and the horizontal longitudinal beams and the horizontal cross beams are positioned above existing shed tunnel cover plates; vertical stone wall panel is vertically set up to horizontal longeron top, and horizontal crossbeam top sets up horizontal stone wall floor, sets up the anchor rope of anchor income mountain in the horizontal stone wall floor. The invention adopts the engineering structure composed of reinforced concrete members to solve the problem of dangerous rock falling and stone protection of high and steep side slopes, and avoids the problems of high construction cost of multi-line shed tunnel construction, low protection height of stone blocking structure construction on steep slopes, crossing of falling stones, difficult maintenance and cleaning of falling stones and the like.
Description
Technical Field
The invention belongs to the technical field of railway engineering construction, and particularly relates to a dangerous rock falling stone protection combined stone blocking wall structure and a construction method thereof.
Background
The railway construction inevitably encounters dangerous rock falling stones of high and steep side slopes, the high and steep side slopes in southwest mountain areas and Tibet areas of China are dangerous in land situation, the dangerous rock falling stones are distributed in a large quantity, and the influence on operation safety is extremely large.
The protection method for the dangerous rock falling of the railway and the highway mainly adopts a slope brushing method, a metal stone blocking net, a tunnel open cut tunnel, a multi-line shed tunnel, a gravity type stone blocking wall, a pile board stone blocking wall, a steel rail fence and the like and a combination method thereof. The newly built railway parallel 8-station roadbed shows after the calculation of the falling stone track that the falling stone can hit the newly built parallel multi-station roadbed, and causes great hidden trouble to driving safety, and the conventional stone blocking method is difficult to reach 20m in stone blocking height or high in manufacturing cost, and needs a method for solving the problems.
Disclosure of Invention
The invention aims to provide a dangerous rock falling stone protection combined stone blocking wall structure and a construction method thereof, which are used for solving the problems that the height of the existing stone blocking structure is less than 20m, the cost of a multi-line shed tunnel structure is high, and the safety risk is increased due to insufficient protection range.
The technical scheme adopted by the invention is as follows:
the utility model provides a dangerous rock falling rock protection combination block wall structure, includes the existing shed tunnel bearing structure of high abrupt side slope one side, and existing shed tunnel bearing structure includes the existing pier body 2 of vertical lining up, is horizontal existing shed tunnel girder 4 between existing pier body 2 mound top and the back side, links through vertical existing shed tunnel secondary beam 5 between the existing shed tunnel girder 4, and existing shed tunnel secondary beam 5 top is equipped with existing shed tunnel apron 16, its characterized in that:
a new pier body 3 is arranged between the existing pier bodies 2, a longitudinal horizontal longitudinal beam 6 is arranged above the new pier body 3, a horizontal cross beam 7 is arranged on the side of the backer perpendicular to the horizontal longitudinal beam 6, and the horizontal longitudinal beam 6 and the horizontal cross beam 7 are positioned above an existing shed tunnel cover plate 16;
vertical stone wall panel 8 is vertically arranged above horizontal longitudinal beam 6, horizontal cross beam 7 is provided with horizontal stone wall rib plate 10 above, and anchor cable 11 anchored into mountain is arranged in horizontal stone wall rib plate 10.
The cross section of the newly-built pier body 3 is rectangular with a variable cross section, the lower part is large and the upper part is small, and the top surface and the bottom surface are horizontal.
The upper part and the lower part of the transverse stone blocking wall rib plate 10 are respectively and obliquely downwards arranged in the mountain, and steel protection pipes of the anchor cables 11 are reserved in the transverse stone blocking wall rib plate 10.
The top surface of the transverse stone blocking rib plate 10 is obliquely downward, and the bottom surface is horizontal.
The transverse stone blocking rib plates 10 are provided with maintenance channels 9.
The outer side of the horizontal cross beam 7 is embedded into a mountain body, and the end part is provided with an expansion end downwards.
An expansion joint 12 perpendicular to the horizontal longitudinal beam 6 is preset on the longitudinal stone wall panel 8.
Gaps are reserved between the horizontal longitudinal beams 6 and the horizontal transverse beams 7 and the existing shed tunnel cover plate 16.
The construction method of the dangerous rock falling rock protection combined stone blocking wall structure is characterized by comprising the following steps of:
step one: firstly, cutting a rectangular opening at the position of an existing shed tunnel cover plate 16 corresponding to the top of a newly-built pier body 3 under the condition of ensuring that an existing shed tunnel main beam 4 and an existing shed tunnel secondary beam 5 are not damaged, and constructing the newly-built pier body 3;
step two: after the strength of the concrete of the newly-built pier body 3 meets the design requirement, erecting a mould on the top surface of the newly-built pier body 3, binding reinforcing steel bars, and pouring concrete to form a horizontal longitudinal beam 6 and a horizontal transverse beam 7;
step three: after the concrete strength of the horizontal longitudinal beam 6 and the horizontal transverse beam 7 meets the design requirement, standing a mould at the center of the top of the horizontal transverse beam 7, binding steel bars, pouring concrete, laying transverse stone blocking wall rib plates 10, reserving an overhaul channel 9, reserving connecting steel bars between the transverse stone blocking wall rib plates 10 and the longitudinal stone blocking wall panel 8, and reserving steel protection pipes at the positions of anchor cables 11 in the transverse stone blocking wall rib plates 10;
step four: after the concrete strength of the transverse stone blocking wall rib plates 10 meets the design requirement, arranging a longitudinal stone blocking wall panel 8 at the center of the top of the horizontal longitudinal beam 6, standing a mould, binding steel bars and pouring concrete;
step five: after the concrete strength of the longitudinal stone blocking wall panel 8 meets the design requirement, the anchor cable 11 is applied;
step six: and after the concrete strength of all the structures meets the design requirement, covering the top surface of the existing shed tunnel with coarse sand for protection.
The invention has the following advantages:
the invention adopts the engineering structure composed of reinforced concrete members to solve the problem of dangerous rock falling and stone protection of high and steep side slopes, and avoids the problems of high construction cost of multi-line shed tunnel construction, low protection height of stone blocking structure construction on steep slopes, crossing of falling stones, difficult maintenance and cleaning of falling stones and the like.
Drawings
FIG. 1 is a cross-sectional view of the present invention at the location of a newly constructed pier body.
FIG. 2 is a cross-sectional view of an existing shed tunnel pier body in accordance with the present invention.
FIG. 3 is a longitudinal section of the present invention.
In the figure, 1-dangerous rock falling rocks, 2-existing pier bodies, 3-newly built pier bodies, 4-existing shed tunnel girders, 5-existing shed tunnel secondary girders, 6-horizontal longitudinal girders, 7-horizontal transverse girders, 8-longitudinal stone blocking wall panels, 9-maintenance channels, 10-transverse stone blocking wall rib plates, 11-anchor cables, 12-expansion joints, 13-existing shed tunnel cover plates, new horizontal longitudinal girders, gaps between horizontal transverse girders, 14-design rail top lines, 15-ground lines and 16-existing shed tunnel cover plates.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention relates to a combined rock blocking wall structure for dangerous rock falling rocks, which comprises an existing shed tunnel supporting structure on one side of a high-steep slope, wherein the existing shed tunnel supporting structure comprises existing pier bodies 2 which are longitudinally arranged in rows, transverse existing shed tunnel main beams 4 are arranged between the pier tops of the existing pier bodies 2 and the side of a backup, the existing shed tunnel main beams 4 are connected through longitudinal existing shed tunnel secondary beams 5, and an existing shed tunnel cover plate 16 is arranged on the top of the existing shed tunnel secondary beams 5. The novel pier body 3 is arranged between the existing pier bodies 2, the longitudinal horizontal longitudinal beam 6 is arranged above the novel pier body 3, the horizontal cross beam 7 is arranged on the side of the backer perpendicular to the horizontal longitudinal beam 6, and the horizontal longitudinal beam 6 and the horizontal cross beam 7 are positioned above the existing shed tunnel cover plate 16. Vertical stone wall panel 8 is vertically arranged above horizontal longitudinal beam 6, horizontal cross beam 7 is provided with horizontal stone wall rib plate 10 above, and anchor cable 11 anchored into mountain is arranged in horizontal stone wall rib plate 10.
Wherein, newly-built pier body 3, horizontal longeron 6, horizontal crossbeam 7 are the substructure, and vertical block wall panel 8, horizontal block wall rib plate 10 and anchor rope 11 are the superstructure, and superstructure and substructure are not connected.
The cross section of the newly-built pier body 3 is rectangular with a variable cross section, the lower part is large and the upper part is small, and the top surface and the bottom surface are horizontal. The newly-built pier body 3 is longitudinally provided with a plurality of channels, and the longitudinal spacing is 4.5m. The horizontal longitudinal beam 6 is 1.25m high and 1.5m wide, and the horizontal transverse beam 7 is 1.25m high and 1.0m wide. The longitudinal stone wall panel 8 has a thickness of 0.8m and a height of 10.0m.
The upper part and the lower part of the transverse stone blocking wall rib plate 10 are respectively and obliquely downwards arranged in the mountain, and steel protection pipes of the anchor cables 11 are reserved in the transverse stone blocking wall rib plate 10. The top surface of the transverse stone blocking rib plate 10 is obliquely downward, and the bottom surface is horizontal. The transverse stone blocking rib plates 10 are longitudinally provided with a plurality of channels, the longitudinal spacing is 4.5m, and the width is 0.6m. The transverse stone wall rib plate 10 and the lower structure horizontal cross beam 7 are positioned on the same central line.
The transverse stone blocking rib plates 10 are provided with maintenance channels 9 which are used for cleaning falling stone channels.
The outer side of the horizontal cross beam 7 is embedded into a mountain body, and the end part is downwards provided with an expansion end, so that the effect of limiting and anchoring is achieved.
An expansion joint 12 perpendicular to the horizontal longitudinal beam 6 is preset on the longitudinal stone wall panel 8 to adapt to structural deformation.
Gaps are reserved between the horizontal longitudinal beams 6 and the horizontal transverse beams 7 and the existing shed tunnel cover plate 16.
The construction method of the dangerous rock falling rock protection combined stone blocking wall structure is characterized by comprising the following steps of:
step one: firstly, cutting a rectangular opening at the position of an existing shed tunnel cover plate 16 corresponding to the top of a newly-built pier body 3 under the condition of ensuring that an existing shed tunnel main beam 4 and an existing shed tunnel secondary beam 5 are not damaged, and constructing the newly-built pier body 3;
step two: after the strength of the concrete of the newly-built pier body 3 meets the design requirement, erecting a mould on the top surface of the newly-built pier body 3, binding reinforcing steel bars, and pouring concrete to form a horizontal longitudinal beam 6 and a horizontal transverse beam 7;
step three: after the concrete strength of the horizontal longitudinal beam 6 and the horizontal transverse beam 7 meets the design requirement, standing a mould at the center of the top of the horizontal transverse beam 7, binding steel bars, pouring concrete, laying transverse stone blocking wall rib plates 10, reserving an overhaul channel 9, reserving connecting steel bars between the transverse stone blocking wall rib plates 10 and the longitudinal stone blocking wall panel 8, and reserving steel protection pipes at the positions of anchor cables 11 in the transverse stone blocking wall rib plates 10;
step four: after the concrete strength of the transverse stone blocking wall rib plates 10 meets the design requirement, arranging a longitudinal stone blocking wall panel 8 at the center of the top of the horizontal longitudinal beam 6, standing a mould, binding steel bars and pouring concrete;
step five: after the concrete strength of the longitudinal stone blocking wall panel 8 meets the design requirement, the anchor cable 11 is applied;
step six: after the concrete strength of all the structures meets the design requirement, covering the top surface of the existing shed tunnel with coarse sand for protection, wherein the thickness is 0.5m.
The invention adopts the engineering structure composed of reinforced concrete members to solve the problem of falling rocks of dangerous rocks of high steep slopes, and solves the problems of high construction cost of multi-line shed tunnel construction, low protection height of stone blocking structures constructed on steep slopes, crossing of falling rocks, difficult maintenance and cleaning of falling rocks and the like.
The content of the invention is not limited to the examples listed, and any equivalent transformation to the technical solution of the invention that a person skilled in the art can take on by reading the description of the invention is covered by the claims of the invention.
Claims (8)
1. The utility model provides a construction method of dangerous rock falling rock protection combination block wall structure, dangerous rock falling rock protection combination block wall structure includes the existing shed tunnel bearing structure of high abrupt slope one side, and existing shed tunnel bearing structure includes the existing pier body (2) of vertical side by side, is horizontal existing shed tunnel girder (4) between existing pier body (2) mound top and the back cushion side, links through vertical existing shed tunnel secondary beam (5) between existing shed tunnel girder (4), and existing shed tunnel secondary beam (5) top is equipped with existing shed tunnel apron (16), its characterized in that:
a new pier body (3) is arranged between the existing pier bodies (2), a longitudinal horizontal longitudinal beam (6) is arranged above the new pier body (3), a horizontal cross beam (7) is arranged towards the side of the backer perpendicular to the horizontal longitudinal beam (6), and the horizontal longitudinal beam (6) and the horizontal cross beam (7) are positioned above an existing shed tunnel cover plate (16);
an upright longitudinal stone blocking wall panel (8) is longitudinally arranged above the horizontal longitudinal beam (6), a transverse stone blocking wall rib plate (10) is arranged above the horizontal cross beam (7), and an anchor rope (11) anchored into a mountain is arranged in the transverse stone blocking wall rib plate (10);
the method comprises the following steps:
step one: firstly, cutting a rectangular opening at the position of an existing shed tunnel cover plate (16) corresponding to the top of a newly-built pier body (3) under the condition of ensuring that an existing shed tunnel main beam (4) and an existing shed tunnel secondary beam (5) are not damaged, and constructing the newly-built pier body (3);
step two: after the concrete strength of the newly-built pier body (3) meets the design requirement, erecting a mould on the top surface of the newly-built pier body (3), binding reinforcing steel bars, pouring concrete and applying the concrete to form a horizontal longitudinal beam (6) and a horizontal transverse beam (7);
step three: after the concrete strength of the horizontal longitudinal beam (6) and the horizontal cross beam (7) reach the design requirement, standing a mould at the center of the top of the horizontal cross beam (7), binding steel bars, pouring concrete, arranging transverse stone blocking wall rib plates (10), reserving an overhaul channel (9), reserving connecting steel bars between the transverse stone blocking wall rib plates (10) and the longitudinal stone blocking wall panel (8), and reserving steel protection pipes at the positions of anchor ropes (11) in the transverse stone blocking wall rib plates (10);
step four: after the concrete strength of the transverse stone blocking wall rib plates (10) meets the design requirement, arranging a longitudinal stone blocking wall panel (8) at the center of the top of the horizontal longitudinal beam (6), standing a mould, binding steel bars and pouring concrete;
step five: after the concrete strength of the longitudinal stone blocking wall panel (8) meets the design requirement, an anchor cable (11) is applied;
step six: and after the concrete strength of all the structures meets the design requirement, covering the top surface of the existing shed tunnel with coarse sand for protection.
2. The method for constructing a combined rock-fall protection stone blocking wall structure according to claim 1, wherein the method comprises the following steps:
the cross section of the newly-built pier body (3) is rectangular with a variable cross section, the lower part is large and the upper part is small, and the top surface and the bottom surface are horizontal.
3. The method for constructing a combined rock-fall protection stone blocking wall structure according to claim 1, wherein the method comprises the following steps:
and anchor cables (11) are respectively and obliquely downwards arranged in the mountain at the upper part and the lower part of the transverse stone blocking rib plate (10), and steel protective pipes of the anchor cables (11) are reserved in the transverse stone blocking rib plate (10).
4. The method for constructing a combined rock-fall protection stone blocking wall structure according to claim 1, wherein the method comprises the following steps:
the top surface of the transverse stone blocking rib plate (10) is inclined downwards, and the bottom surface is horizontal.
5. The method for constructing a combined rock-fall protection stone blocking wall structure according to claim 1, wherein the method comprises the following steps:
and the transverse stone blocking rib plates (10) are provided with maintenance channels (9).
6. The method for constructing a combined rock-fall protection stone blocking wall structure according to claim 1, wherein the method comprises the following steps:
the outer side of the horizontal cross beam (7) is buried into a mountain, and the end part is downwards provided with an expansion end.
7. The method for constructing a combined rock-fall protection stone blocking wall structure according to claim 1, wherein the method comprises the following steps:
an expansion joint (12) vertical to the horizontal longitudinal beam (6) is preset on the longitudinal stone blocking wall panel (8).
8. The method for constructing a combined rock-fall protection stone blocking wall structure according to claim 1, wherein the method comprises the following steps:
gaps are reserved between the horizontal longitudinal beams (6) and the horizontal cross beams (7) and the existing shed tunnel cover plate (16).
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| CN111270619A (en) * | 2020-02-27 | 2020-06-12 | 中铁第一勘察设计院集团有限公司 | Railway bridge steel-UHPC combined rockfall protection shed tunnel and construction method thereof |
| CN113073582B (en) * | 2021-04-19 | 2022-07-22 | 中铁二院工程集团有限责任公司 | Construction method of side slope dangerous rock falling stone blocking structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202830942U (en) * | 2012-08-27 | 2013-03-27 | 中铁二院工程集团有限责任公司 | Combined supporting structure with anchor cables and cast-in-situ bored piles |
| CN103243665B (en) * | 2013-05-27 | 2016-04-20 | 中铁工程设计咨询集团有限公司 | Deep cutting blocks rock-fall protection method |
| CN105178206B (en) * | 2015-08-06 | 2017-04-19 | 中铁二院昆明勘察设计研究院有限责任公司 | Spliced-type shed tunnel |
| CN107558387B (en) * | 2017-10-25 | 2023-10-20 | 吉林大学 | Novel combined type flexible shed tunnel structure for protecting high-altitude falling rocks and collapse broken stones |
| CN109356046B (en) * | 2018-10-31 | 2024-03-26 | 四川路航建设工程有限责任公司 | Grille steel structure stone blocking wall and construction method |
| CN209798566U (en) * | 2019-03-04 | 2019-12-17 | 中铁第一勘察设计院集团有限公司 | dangerous rock falling stone protection combination stone blocking wall structure |
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