CN115164655A - High slope brushing construction method for broken surrounding rock at tunnel portal of high-speed railway - Google Patents
High slope brushing construction method for broken surrounding rock at tunnel portal of high-speed railway Download PDFInfo
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- CN115164655A CN115164655A CN202210862172.4A CN202210862172A CN115164655A CN 115164655 A CN115164655 A CN 115164655A CN 202210862172 A CN202210862172 A CN 202210862172A CN 115164655 A CN115164655 A CN 115164655A
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- 239000011435 rock Substances 0.000 title claims abstract description 29
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 230000001680 brushing effect Effects 0.000 title claims abstract description 18
- 238000005422 blasting Methods 0.000 claims abstract description 29
- 239000004575 stone Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 239000002893 slag Substances 0.000 claims abstract description 8
- 238000005474 detonation Methods 0.000 claims abstract description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 15
- 239000004567 concrete Substances 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 241001233242 Lontra Species 0.000 description 24
- 238000005096 rolling process Methods 0.000 description 11
- 239000004576 sand Substances 0.000 description 9
- 230000008859 change Effects 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The application discloses a high slope brushing construction method for broken surrounding rock at a tunnel portal of a high-speed railway, which comprises the following steps: s1, leveling a working surface to ensure the flatness of a pre-splitting blasting construction site; s2, lofting hole positions, wherein the plane positions of the pre-cracked holes and the orientation points corresponding to the pre-cracked holes are lofted; s3, drilling by adopting a crawler-type down-the-hole drill carriage; s4, adopting a continuous charging structure for the main gun hole and the auxiliary holes, and adopting a non-coupled air spaced charging structure for the pre-splitting holes; s5, laying a detonation network and detonating; s6, in the blasting process, the meshes of the upper screen plate and the lower screen plate in the protective shed frame are completely arranged in a staggered manner; and after blasting, removing slag, and pulling the lower screen plate to realize the adjustment of the dislocation amount of the meshes between the lower screen plate and the upper screen plate, so that broken stones with different particle sizes fall to a material receiving plate positioned below the lower screen plate and then slide into a corresponding material receiving box. This application has realized the quick classification to different particle diameter rubbles, has improved the effect of treatment effeciency.
Description
Technical Field
The invention relates to the field of slope brushing, in particular to a high slope brushing construction method for broken surrounding rock at a tunnel portal of a high-speed railway.
Background
High slope controlled blasting construction in complex environments at home and abroad is basically more in the field of water conservancy and hydropower, relatively few in railway construction projects, and especially is basically rare in high-speed railway projects.
In the related technology, the concept of combining a control blasting and protection system is provided aiming at the characteristics of high drop height of a side slope and complex surrounding environment, and the oil pipeline is safe by adopting protection measures such as oil pipeline cover plate protection, protection shed frame protection, setting of a rockfall platform and the like aiming at the oil pipeline buried around the side slope.
As shown in fig. 1, the protection rack is the setting of L type in oil pipeline top usually, in the actual work progress, most of the rock rolls stop on the rock falling platform that is the ladder setting, few part of rock rolls roll the top to the protection rack easily, when the scarfing cinder is accomplished to the scene to the brush slope, need to protect the rack top through the backhoe with the protection rack back of shoveling away the back with the rock rolls, transport the assigned position again and carry out classification to the rock, and be applied to the rubble of the different particle diameters after classification in the similar filtration projects such as graded broken stone back-filtration around the side slope, the treatment effeciency is lower, there is the improvement space.
Disclosure of Invention
In order to realize rapid classification treatment of the rolling stones with different particle sizes, the application provides a high slope brushing construction method for broken surrounding rock at a tunnel portal of a high-speed railway.
The application provides a high slope brushing construction method for broken surrounding rock at a tunnel portal of a high-speed railway, which adopts the following technical scheme:
a high slope brushing construction method for broken surrounding rock at a tunnel portal of a high-speed railway comprises the following steps:
s1, leveling a working surface to ensure the flatness of a pre-splitting blasting construction site;
s2, lofting hole positions, wherein the plane positions of the pre-cracked holes and the orientation points corresponding to the pre-cracked holes are lofted;
s3, drilling by adopting a crawler-type down-the-hole drill carriage;
s4, adopting a continuous charging structure for the main gun hole and the auxiliary hole, and adopting an uncoupled air spaced charging structure for the pre-splitting hole;
s5, laying a detonation network and detonating;
s6, in the blasting process, the meshes of the upper screen plate and the lower screen plate in the protective shed frame are completely arranged in a staggered manner;
removing slag after blasting, and pulling the lower screen plate to realize the adjustment of the dislocation amount of the meshes between the lower screen plate and the upper screen plate, so that broken stones with different particle sizes fall to a material receiving plate positioned below the lower screen plate and then slide into a corresponding material receiving box;
the upper net plate and the lower net plate are obliquely and downwards arranged towards one end deviating from the side slope.
By adopting the technical scheme, in the blasting process, when the rolling stones roll to the top of the protective shed frame, namely the surface of the upper screen plate, large rolling stones roll to the ground outside the protective shed frame through the upper screen plate and the lower screen plate which are obliquely arranged, and because the lower screen plate and the upper screen plate are completely arranged in a staggered manner, the broken stones with the particle sizes smaller than the meshes of the upper screen plate fall in the meshes of the upper screen plate and on the upper surface of the lower screen plate at the positions where the meshes are not arranged in the rolling process; when slag removal is finished after blasting, the lower screen plate is pulled to change the dislocation amount of the mesh holes of the lower screen plate and the upper screen plate, different distances are respectively pulled, so that corresponding crushed stones with different particle sizes fall to the material receiving plate through the exposed meshes of the dislocated upper screen plate and lower screen plate, and slide to the corresponding material receiving boxes along the material receiving plate, and in the using process, constructors can replace the material receiving boxes with different particle sizes for the crushed stones with different particle sizes; the quick classification treatment of the rolling stones with different particle sizes is realized, and the treatment efficiency is improved.
Preferably, the protective shed frame comprises a fixed frame fixed on the outer ground surface of the side slope, an embedded frame fixed on the slope surface of the side slope and an adjustable frame arranged between the top end of the fixed frame and the embedded frame, and the adjustable frame comprises an upper net plate and a lower net plate.
By adopting the technical scheme, the oil conveying pipeline is protected by the aid of the fixing frame and the adjustable frame, and damage to the oil conveying pipeline caused by falling of the rolling stones is avoided.
Preferably, one end of the upper screen plate is fixed on the pre-buried frame, the lower screen plate is connected below the upper screen plate in a sliding mode, and one end, away from the pre-buried frame, of the lower screen plate abuts against the fixing frame.
Through adopting above-mentioned technical scheme, realized being connected between each component in the adjustable shelf, will descend otter board and be connected with the upper net board, realized stability and the wholeness of being connected between the two.
Preferably, the one end that lower network board kept away from pre-buried frame is equipped with the connecting piece that is used for being connected with the stay cord, and the other end and the arm of stay cord are connected.
Through adopting above-mentioned technical scheme, when the otter board needs to be pulled down, will connect the stay cord on the arm and be connected with the connecting piece on the otter board down, through the arm under the incline direction pulling of otter board down the otter board removal, be convenient for carry out the accurate adjustment to otter board pulling distance down.
Preferably, the mount top is equipped with a plurality of sand grips down, and a plurality ofly has been laid at lower top of the head strip interval, is equipped with a plurality of sand grips of going up on the lower grid plate, goes up the top of the head strip interval and has laid a plurality ofly and with the crisscross butt setting of lower top of the head strip.
Through adopting above-mentioned technical scheme, when the otter board under the pulling, the setting up of lower sand grip and last sand grip makes the otter board move down the one end that the otter board deviates from pre-buried frame and takes place vibrations, is favorable to the rubble on the adjustable frame to drop, has reduced the appearance of the condition of rubble card in the mesh.
Preferably, a sliding groove is formed in the lower screen plate, a sliding strip is fixed on the upper screen plate, the sliding strip is connected in the sliding groove in a sliding mode, and the sliding groove is in T-shaped arrangement.
Through adopting above-mentioned technical scheme, realized going up the netboard and being connected with sliding between the netboard down, the groove that slides that is the T type setting simultaneously has increased stability and the wholeness of being connected between netboard and the lower netboard, and the relative motion of otter board and the vertical direction of lower netboard is gone up in the restriction.
Preferably, a reinforced concrete cover plate is arranged on the slope surface above the oil conveying pipeline, and the reinforced concrete cover plate is obliquely arranged.
Through adopting above-mentioned technical scheme, the setting of concrete cover plate has played preliminary guard action to oil pipeline, and the constructor of also being convenient for simultaneously fixes a position the setting of protection canopy frame.
Preferably, one side of the reinforced concrete cover plate, which is far away from the side slope, is provided with a concrete guard foot, and the concrete guard foot is abutted to the reinforced concrete cover plate.
By adopting the technical scheme, the stability of the reinforced concrete cover plate is improved, and the situation that the reinforced concrete cover plate is shifted is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when slag removal is finished after blasting, the lower screen plate is pulled to change the dislocation amount of the mesh holes of the lower screen plate and the upper screen plate, different distances are respectively pulled, so that corresponding crushed stones with different particle sizes fall to the material receiving plate through the exposed meshes of the dislocated upper screen plate and lower screen plate, and slide to the corresponding material receiving boxes along the material receiving plate, and in the using process, constructors can replace the material receiving boxes with different particle sizes for the crushed stones with different particle sizes; the rapid classification treatment of the rolling stones with different particle sizes is realized, and the treatment efficiency is improved;
2. when otter board under the pulling, the setting up of lower sand grip and last sand grip makes the otter board move down the one end that the otter board deviates from pre-buried frame and takes place vibrations, is favorable to the rubble on the adjustable frame to drop, has reduced the appearance of the condition of rubble card in the mesh.
Drawings
Fig. 1 is a schematic view showing positions of a cover plate, a protective shed frame, a rock fall platform and an oil pipeline in the background art.
Fig. 2 is an overall schematic view showing the position of an oil pipeline and a protective structure for the oil pipeline in the embodiment of the present application.
Fig. 3 is a partial structural view showing a protection shed structure in the embodiment of the present application.
Fig. 4 is a partial schematic view showing a positional relationship between the upper protruding strip and the lower protruding strip in the embodiment of the present application;
fig. 5 is a schematic diagram showing a position where the upper net plate and the lower net plate are in a dislocated state and crushed stones can fall at a non-marked line in the embodiment of the present application.
Description of reference numerals:
1. a rock fall platform; 11. a passive stone blocking net; 2. a reinforced concrete cover plate; 21. concrete foot protection; 3. a protective shed frame; 31. a fixed mount; 32. pre-burying a frame; 33. an adjustable frame; 331. feeding a screen plate; 3311. a sliding groove; 332. a lower screen plate; 3321. a sliding strip; 4. a material receiving plate; 5. a material receiving box; 6. a connecting member; 71. an upper convex strip; 72. and a lower convex strip.
Detailed Description
The present application is described in further detail below with reference to figures 2-5.
The embodiment of the application discloses a construction method for brushing slopes on broken surrounding rock high slopes at a tunnel portal of a high-speed railway.
Referring to fig. 2, the side slope is in a ladder-shaped arrangement to form a multi-stage rock falling platform 1, and a passive stone blocking net 11 is arranged on the outer edge of each stage of rock falling platform 1 for rolling stone protection, so that most of the rolling stones stay on the rock falling platform 1. The slope surface above the oil pipeline is obliquely provided with a reinforced concrete cover plate 2, and backfill is filled below the reinforced concrete steel plate. One side of the reinforced concrete cover plate 2 departing from the side slope is abutted with a plurality of concrete guard feet 21 arranged at intervals.
Referring to fig. 3 to 5, the shelter frame 3 includes a fixed frame 31, an embedded frame 32, and an adjustable frame 33 disposed therebetween. The fixing frame 31 is vertically fixed on the ground outside the side slope, and the embedded frame 32 is arranged on the side slope surface through embedded bolts.
The adjustable frame 33 comprises an upper screen plate 331 and a lower screen plate 332 which are arranged up and down, the lower screen plate 332 and the upper screen plate 331 are mutually attached and in sliding fit, and the upper screen plate 331 and the lower screen plate 332 are provided with meshes with the same shape and size. Go up the otter board 331 and seted up groove 3311 that slides along its width direction on, the cross sectional shape of groove 3311 that slides is the T type, and two have been laid along the length direction interval of otter board 331 in groove 3311 that slides, offer on the lower otter board 332 with the strip 3321 that slides of groove 3311 looks adaptation that slides, the strip 3321 that slides and connects in groove 3311 that slides.
In the initial state and the blasting process, the meshes on the upper net plate 331 and the lower net plate 332 are in a completely staggered state, rolling stones with the grain sizes larger than the meshes roll off the upper net plate 331 to the ground outside the protective shed frame 3, and crushed stones with the grain sizes smaller than the meshes fall in the meshes in the rolling process; when the blasting is completed and slag is required to be removed, the mesh dislocation amount is adjusted by pulling the lower mesh plate 332 outwards, and crushed stones with different particle sizes are classified and collected by pulling different distances.
Go up otter board 331 and lower otter board 332 and establish to the steel sheet, have certain weight, for the convenience of pulling lower otter board 332 and the displacement distance of accurate control lower otter board 332, be equipped with connecting piece 6 in the one end that lower otter board 332 deviates from the side slope, be connected with the stay cord on connecting piece 6, the other end of stay cord is used for being connected with the arm, stay cord and arm are not shown in the drawing.
In addition, the lower surface of one end of the lower mesh plate 332, which is far away from the side slope, is provided with upper raised strips 71, the upper raised strips 71 are arranged along the length direction of the lower mesh plate 332, and a plurality of upper raised strips are arranged at intervals along the width direction of the lower mesh plate 332; the top of mount 31 is equipped with down sand grip 72, and lower sand grip 72 interval is laid a plurality ofly and is gone up the crisscross butt of sand grip 71 to make down otter board 332 when outside the removal under the effect of external force, lower otter board 332 drives one section vibrations that go up otter board 331 and deviate from pre-buried frame 32, and vibrations do benefit to the rubble on the adjustable frame 33 and drop.
A high slope brushing construction method for broken surrounding rock at a tunnel portal of a high-speed railway comprises the following steps:
s1, leveling a working surface:
performing voucher on the pre-splitting blasting site to ensure the flatness of the pre-splitting blasting construction site and the safety of drilling machine construction, and enabling the working surface to be as flat as possible in the transverse direction;
s2, hole site lofting:
the quality of the pre-splitting blasting effect depends on the direction, the angle and the depth of the pre-splitting hole to a great extent. And accurately lofting the plane position of the pre-cracked hole of the high slope by using a Zhonghaida V90 linear lofting function before drilling, wherein the deviation of the position of the hole opening cannot exceed 1 time of the diameter of the blast hole, and then linearly lofting to form an orientation point corresponding to the pre-cracked hole after 2m away from the pre-cracked hole.
S3, drilling:
and drilling by adopting a crawler-type down-the-hole drill carriage. Before drilling, a plumb line is hung at a directional point by using a simple tripod, so that a drill rod of the drill carriage and the plumb line are kept on the same longitudinal plane. In the drilling process, the process tracking gradient check is carried out, the slope gradient check is carried out by using a slope ruler, the consistency of the drilling hole and the slope gradient surface of the slope is ensured, and the adjacent blast holes are kept parallel to each other.
S4, hole site inspection:
before charging, all blast holes are inspected, residues and accumulated water in the holes are blown off, the blast holes are not dried, and the blasting equipment has waterproof measures.
S5, a charging structure:
the main blast hole and the auxiliary hole are of a continuous charging structure, and the pre-splitting hole is of a non-coupling air interval charging structure.
S6, safety warning:
when the blasting equipment is transported to the working face, warning is set, warning personnel seal the blasting area, and non-blasting construction personnel are forbidden to enter the blasting area. After charging, filling, network connection and careful inspection to confirm correctness, all personnel and equipment should be evacuated from the work site to a safe place and the warning range is expanded to the range specified by the design. And reporting the condition to the blasting command department by each alarm success point and the detonation station through the wireless interphone.
S7, a detonating network:
the initiation network adopted by the main blast hole and the auxiliary blast hole for the engineering blasting is a plastic detonating tube non-electric millisecond detonator initiation system, and the relay initiation network with the hole extension period can effectively reduce the influence of the blasting vibration harmful effect on the oil pipeline by a single hole and a single sound.
Detonating cords are connected in series in the pre-splitting holes, all the pre-splitting holes are detonated simultaneously or are detonated in groups (about 5-10 pre-splitting holes in each group) according to the maximum single-shot dose control, the time interval of the group detonating is about 25 ms, and a main line of the detonating cord is connected with an initial booster detonator of the main blast hole.
S8, slag removal after blasting:
in order to ensure the safety of the oil pipeline, a reinforced concrete precast slab which is precast in advance is laid right above the oil pipeline. The precast slab is prefabricated by C25 concrete, the structural size is 1.6 x 0.5 x 0.2 m, and the precast slab is provided with two layers of reinforcing steel meshes with the spacing of 9.8 x 8.5cm and the specification of HRB400 phi 12 and phi 16. The concrete precast slabs are prefabricated in a factory and concentrated mode and are transported to the site to be paved by a flat car in a unified mode. Before laying the prefabricated plate, the top of the pipeline is manually leveled and clay is used for leveling, so that the prefabricated cover plate is guaranteed to be stable. When the cover plate is laid, the cover plate is laid right above the pipeline to ensure that the line type of the cover plate is smooth as much as possible, and the center of the cover plate is coincident with the central line of the pipeline.
During slag removal after blasting, the rock falling platform 1 and the above-ground rock rolls are firstly shoveled out and conveyed to a designated position through a backhoe excavator, then the material receiving box 5 is put in place, the lower mesh plate 332 is outwards pulled through the matching of the mechanical arm and the pull rope to change the mesh dislocation amount of the lower mesh plate 332 and the upper mesh plate 331, different distances are respectively pulled, so that the corresponding crushed stones with different particle sizes fall to the material receiving plate 4 through the meshes exposed after the dislocation of the upper mesh plate 331 and the lower mesh plate 332, and slide along the material receiving plate 4 to the corresponding material receiving box 5, in the process of pulling the lower mesh plate 332, the lower mesh plate 332 and the upper mesh plate 331 vibrate under the action of the upper convex strips 71 and the lower convex strips 72, the falling of the crushed stones is facilitated, in the using process, constructors replace the material receiving boxes 5 with different particle sizes corresponding to the crushed stones with different particle sizes, and quick classification processing of the crushed stones with different particle sizes is realized.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A high slope brushing construction method for broken surrounding rock at a tunnel portal of a high-speed railway is characterized by comprising the following steps:
s1, leveling a working surface to ensure the flatness of a pre-splitting blasting construction site;
s2, lofting hole positions, and lofting out the plane positions of the pre-cracked holes and the orientation points corresponding to the pre-cracked holes;
s3, drilling by adopting a crawler-type down-the-hole drill carriage;
s4, charging powder into the drilled hole;
s5, laying a detonation network and detonating;
s6, in the blasting process, the mesh holes in the upper net plate (331) and the lower net plate (332) in the protective shed frame (3) are completely arranged in a staggered mode;
slag is removed after blasting, the lower screen plate (332) is pulled to adjust the dislocation amount of meshes between the lower screen plate (332) and the upper screen plate (331), and broken stones with different particle sizes fall to a material receiving plate (4) positioned below the lower screen plate (332) and then slide into a corresponding material receiving box (5);
the upper net plate (331) and the lower net plate (332) are arranged obliquely downwards to one end back to the side slope.
2. The high slope brushing construction method for the broken surrounding rock at the tunnel portal of the high-speed railway according to claim 1, characterized in that: the protective shed frame (3) comprises a fixed frame (31) fixed on the ground outside the side slope, an embedded frame (32) fixed on the slope surface of the side slope and an adjustable frame (33) arranged between the top end of the fixed frame (31) and the embedded frame (32), wherein the adjustable frame (33) comprises an upper net plate (331) and a lower net plate (332).
3. The high slope brushing construction method for the broken surrounding rock at the tunnel portal of the high-speed railway according to claim 2 is characterized in that: one end of the upper mesh plate (331) is fixed on the embedded frame (32), the lower mesh plate (332) is connected below the upper mesh plate (331) in a sliding mode, and one end, departing from the embedded frame (32), of the lower mesh plate (332) abuts against the fixing frame (31).
4. The high slope brushing construction method for the broken surrounding rock at the tunnel portal of the high-speed railway according to claim 2 is characterized in that: one end of the lower net plate (332) departing from the embedded frame (32) is provided with a connecting piece (6) used for being connected with a pull rope, and the other end of the pull rope is connected with the mechanical arm.
5. The high slope brushing construction method for the broken surrounding rock at the tunnel portal of the high-speed railway according to claim 3 is characterized in that: the top end of the fixing frame (31) is provided with a plurality of lower convex strips (72), a plurality of lower convex strips (72) are arranged at intervals, a plurality of upper convex strips (71) are arranged on the lower mesh plate (332), and a plurality of upper convex strips (71) are arranged at intervals and are in staggered butt joint with the lower convex strips (72).
6. The high slope brushing construction method for the broken surrounding rock at the tunnel portal of the high-speed railway according to claim 3, characterized in that: the lower net plate (332) is provided with a sliding groove (3311), the upper net plate (331) is fixed with a sliding strip (3321), the sliding strip (3321) is connected in the sliding groove (3311) in a sliding way, and the sliding groove (3311) is arranged in a T shape.
7. The high slope brushing construction method for the broken surrounding rock at the tunnel portal of the high-speed railway according to claim 1 is characterized in that: the slope surface above the oil pipeline is provided with a reinforced concrete cover plate (2), and the reinforced concrete cover plate (2) is obliquely arranged.
8. The high slope brushing construction method for the broken surrounding rock at the tunnel portal of the high-speed railway according to claim 7 is characterized in that: one side of the reinforced concrete cover plate (2) departing from the side slope is provided with a concrete guard pin (21), and the concrete guard pin (21) is abutted against the reinforced concrete cover plate (2).
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| CN202210862172.4A CN115164655B (en) | 2022-07-20 | 2022-07-20 | Construction method for brushing broken surrounding rock high slope at tunnel portal of high-speed railway |
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| CN105115372A (en) * | 2015-09-02 | 2015-12-02 | 贵州新联爆破工程集团有限公司 | Device for protection against rolling stones generated in high slope explosion |
| CN206244513U (en) * | 2016-08-31 | 2017-06-13 | 鑫源鑫（北京）水利工程有限公司 | River lake biological cleaning slope system |
| CN110206047A (en) * | 2019-06-18 | 2019-09-06 | 赵安朝 | A kind of protective slope structure of side slope |
| CN211571742U (en) * | 2019-10-10 | 2020-09-25 | 昆明理工大学 | Passive energy dissipation protective structure of side slope |
| CN112267484A (en) * | 2020-11-04 | 2021-01-26 | 刘涛 | A drainage system that is used for highway side slope that possesses good reinforcement effect |
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