CN111425055A - Secondary sand accumulation prevention facility based on wind-break wall - Google Patents
Secondary sand accumulation prevention facility based on wind-break wall Download PDFInfo
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- CN111425055A CN111425055A CN202010209662.5A CN202010209662A CN111425055A CN 111425055 A CN111425055 A CN 111425055A CN 202010209662 A CN202010209662 A CN 202010209662A CN 111425055 A CN111425055 A CN 111425055A
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- wind
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
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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
- E01F7/02—Snow fences or similar devices, e.g. devices affording protection against sand drifts or side-wind effects
- E01F7/025—Devices specially adapted for protecting against wind, e.g. screens, deflectors or attenuators at tunnel or lock entrances
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/20—Posts therefor
- E04H17/22—Anchoring means therefor, e.g. specially-shaped parts entering the ground; Struts or the like
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to the technical field of wind and sand prevention of traffic facilities, in particular to a secondary sand accumulation prevention facility based on a wind-break wall, which comprises a first wind-break wall arranged on a embankment, a flat ground or a cutting, wherein a second retaining wall is arranged on the leeward side of the first wind-break wall of the embankment, the flat ground or the cutting, a sand-cutting ditch is dug on the leeward side of the second retaining wall, and an inclined plate is additionally arranged at the top of the first wind-break wall aiming at the cutting with the most serious sand accumulation; through adopting the measure that sets up second barricade and sand-catching ditch and swash plate, the effectual sand grain that has prevented leeward side returns the circuit and forms the phenomenon of long-pending sand under the effect of vortex, guarantees that the train does not receive strong wind and long-pending sand influence, high-speed, safe operation under different topography.
Description
Technical Field
The invention relates to the technical field of wind and sand prevention of traffic facilities, in particular to a secondary sand accumulation prevention facility based on a wind-break wall.
Background
The Lanxin two-line is the first high-speed railway crossing the strong wind area in the world, and is used in the wind area of the smoke pier, the Bailey, the thirty-miles and the Daban city, and the mileage of the railway in the wind area reaches 462.4 kilometers. The strong wind frequently occurs in four strong wind areas, the wind speed is extremely high, the weather of partial sections with the year greater than 8-grade strong wind reaches 208 days, the strong wind easily causes accidents of turning over trains, vehicle slip, window breakage, driving facility damage and the like, and the operation, maintenance and transportation safety of railways are greatly damaged. In order to resist the damage of the heavy wind to the passing train, a large number of windproof structures are built along the new line of the Lanxin, wherein the most widely applied windproof wall is shown in figures 4, 5 and 6. The road section with the wind-shield wall accounts for 65.1 percent of the total length of the line of the Xinjiang section. Part of the high wind zone is located in the gobi desert where the terrain fluctuates, and the lines pass through these places to form numerous cuts, embankments and flat lands. The height of the wind-break wall is 3.8-4.3m at the embankment and flat ground section, so as to ensure that the train does not overturn when running in a strong wind environment, the cutting has certain wind-proof capability, and the wind-break wall is smaller than the embankment and flat ground section at the initial design height.
Because the gobi desert is located in the strong wind area, the climate is drought and rainy, the soil quality is loose, the earth surface particle resources are rich, the gobi earth surface is seriously unstable under the action of strong airflow, and sand particles are easy to form strong wind and sand flow under the drive of wind, the strong wind area is also an area with frequent sand and dust activities. When the sand-carrying airflow passes through the wind-break wall along the railway, the airflow speed is redistributed, and the wind-sand flow balance state is damaged, so that part of sand grains are deposited around the wind-break wall and on the railway track, and the safe operation of the train is seriously influenced. The existing research results show that the sand accumulated on the line formed by the wind-break wall mainly exists in a larger vortex area on the lee side, and sand particles passing through the top of the retaining wall return to the line under the action of the vortex and form the accumulated sand.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a secondary sand accumulation prevention facility based on a wind-break wall, which effectively prevents sand grains on the lee side from returning to a line and forming sand accumulation under the action of vortex by adopting measures of a second retaining wall and a sand-blocking ditch, and ensures that a train is not influenced by strong wind and sand accumulation under different terrains and runs safely at high speed.
In order to achieve the above purpose, the technical solution adopted by the present application is as follows:
the utility model provides a sand accumulation facility is prevented to secondary based on wind-break wall, includes the first wind-break wall 1 that sets up on embankment, level land or cutting, sets up second barricade 2 in the first wind-break wall 1 leeward side of embankment, level land or cutting to dig at second barricade leeward side and establish interception ditch 3.
The height of the second retaining wall is the same as that of the first wind-break wall 2.
The second retaining wall 2 on the embankment is arranged at the top of the leeward side 1 of the first wind-break wall, the second retaining wall 2 on the flat ground is arranged at the 15-17m position of the leeward side of the first wind-break wall 1, and the second retaining wall 2 on the cutting is arranged at the top of the leeward side of the first wind-break wall 1;
the sand intercepting ditch 3 is in an inverted trapezoid shape, and the gradient of an inclined edge is 1.5: 1.
The sand intercepting ditch 3 on the embankment is arranged at a position 1.5-2.5m away from the leeward side slope foot of the second retaining wall 2; the sand cutting ditch 3 on the flat ground or the cutting is arranged at a position 1.5-2.5m away from the lee side of the second retaining wall 2.
The sloping plate 4 is arranged on the first wind-break wall 1 arranged on the cutting.
The included angle between the leeward side of the first wind-shielding wall 1 and the inclined plate 4 is 120-150 degrees.
The invention has the beneficial effects that:
1) can guarantee the simultaneous prevention of sand and wind, and get rid of the defect that the original wind-break wall can not prevent sand and wind at the same time.
2) The structure of the existing wind-proof wall is not changed, and the balance of wind and sand prevention of the embankment, the cutting and the flat section can be ensured.
3) The installation is fast, the construction is simple and convenient, the cost is low, can be widely used.
Drawings
FIG. 1 is a schematic structural view of an embankment-type wind-break wall according to the present invention;
FIG. 2 is a schematic view of the flat windshield wall according to the present invention;
FIG. 3 is a schematic view of a cut wind-break wall structure according to the present invention;
FIG. 4 is a schematic structural view of a embankment-type wind-break wall in the prior art;
FIG. 5 is a schematic view of a flat windshield wall in the prior art;
FIG. 6 is a schematic view of a cut wind-break wall in the prior art;
shown in the figure: the sand-blocking structure comprises a first wind-blocking wall 1, a second retaining wall 2, a sand-blocking ditch 3 and an inclined plate 4.
Detailed Description
The technical scheme of the invention is further explained by specific embodiments in the following with the accompanying drawings:
example 1
The invention relates to a secondary sand accumulation prevention facility based on an existing wind-break wall, namely a first wind-break wall 1, which comprises the first wind-break wall 1, a second retaining wall 2 and a sand-intercepting ditch 3, wherein aiming at a cutting type, besides the first wind-break wall 1, the second retaining wall 2 and the sand-intercepting ditch 3, an inclined plate 4 with a certain angle is additionally arranged at the top of the first wind-break wall 1, and the range of a leeward side backflow area is moved later, so that the backflow wind sand flow can be intercepted by the second retaining wall 2. However, the sloping plate 4 cannot be arranged on the embankment or the flat ground, because the sloping plate 4 affects the contact net and the power supply facility.
Fig. 1 is a secondary sand accumulation prevention facility of an embankment type wind break wall. Fig. 4 is a traditional embankment type wind-shielding wall structure, the height is generally 3.8-4.3m, the original design function is wind shielding, sand accumulation on the line is not considered, but the sand accumulation on the line is serious at present, and the safe operation of a high-speed train is influenced. The existing research results show that the reason for the sand accumulation is that the air flow velocity is redistributed when the sand flow passes through the first wind-break wall 1, the balance state of the sand flow is damaged, and a larger backflow area is formed behind the sand flow velocity, so that part of sand particles passing through the wind-break wall returns to the line under the effect of the backflow area and forms the sand accumulation. In fig. 1, a line II shows that the sand-carrying airflow returns to a line under the action of a backflow area, and a line I shows that sand grains outside the backflow area move to a far distance along with wind. The second retaining wall 2 and the sand-catching groove 3 are added in the figure 1. The second retaining wall 2 is used for intercepting the backflow sand-carrying airflow to enable the backflow sand-carrying airflow to be deposited at a position far away from the track line, and the sand interception ditch 3 is used for avoiding forming a new sand source behind the second retaining wall 2, because the sand particle deposition can be gradually accumulated along with the time increase.
Fig. 2 is a flat land type wind break wall secondary anti-accumulation facility, the sand accumulation mechanism of which is the same as that of an embankment type wind break wall, and the action principle of the additionally arranged second retaining wall 2 and a sand interception ditch 3 is also the same.
Fig. 3 is a cut type wind-break wall secondary anti-accumulation facility. The reason for sand accumulation of the cut type traditional wind-break wall is the same as that of the embankment type wind-break wall, but on-site investigation finds that the sand accumulation caused by the cut type wind-break wall is more serious than that of the embankment type wind-break wall and the flat land type wind-break wall. The reason is that the cutting has a certain windproof function, so the height of the first wind-break wall 1 is shorter than that of a embankment type and a flat ground type, the specific height is set according to the depth of the cutting, the specific height is generally within 2.0-2.5m, and wind-break walls are not arranged on part of deeper cutting sections. At the beginning of design, only how to prevent wind is considered, but the gale area is often the area with rich sand sources, and the serious sand accumulation of the line can be caused while preventing wind. Therefore, the sand accumulation phenomenon of the cutting is more serious for the above reasons. To this, except addding second barricade 2 and sand-stopping ditch 3, swash plate 4 has still been add to the cut wind-break wall, the reason of addding swash plate 4 is that first wind-break wall 1 of cut is about 8.5m apart from first track circuit, the fluid section behind the back is big, the recirculation zone that first wind-break wall 1 formed often is on the track line, make original recirculation zone remove backward after addding swash plate 4, and intercept it with second barricade 2, in order to reach the mesh that reduces the circuit deposition sand, power supply equipment such as the contact net of track top can not be influenced to swash plate 4 moreover. The sand trap 3 functions in the same manner as the above-described flat land type and embankment type.
However, the embankment type and flat ground type wind-break walls are not suitable for arranging the inclined plates for the following reasons: on the one hand, the distance between the flat ground type wind-break wall and the embankment type wind-break wall is close to the track line and is about 4.5m, the backflow area formed on the leeward side is not on the track line, and on the other hand, the power supply equipment such as a contact net above the track can be influenced after the inclined plate 4 is additionally arranged.
The wind tunnel experiment result shows that the accumulated sand of the track line is reduced by 63 percent on the whole (the wind speed is 21m/s) after the second retaining wall 4 is additionally arranged, so the accumulated sand of the track line can be effectively reduced after the second retaining wall 2 is additionally arranged.
Its advantages are no change of original structure of wind-shielding wall, high wind-shielding effect, high balance between wind and sand, and high installation speed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a secondary sand accumulation prevention facility based on wind-break wall, includes the first wind-break wall that sets up on embankment, level land or cutting, its characterized in that sets up second barricade at the first wind-break wall leeward side of embankment, level land or cutting to dig at second barricade leeward side and establish the sand-stopping ditch.
2. The secondary sand accumulation prevention facility based on the wind break wall as claimed in claim 1, wherein: the second retaining wall is arranged at the same height as the first wind-break wall.
3. The secondary sand accumulation prevention facility based on the wind break wall as claimed in claim 2, wherein: the second retaining wall on the embankment is arranged at the top of the slope on the leeward side of the first wind-break wall, the second retaining wall on the flat ground is arranged at the 15-17m position on the leeward side of the first wind-break wall, and the second retaining wall on the cutting is arranged at the top of the slope on the leeward side of the first wind-break wall.
4. The secondary sand accumulation prevention facility based on the wind break wall as claimed in claim 1, wherein: the sand intercepting ditch is in an inverted trapezoid shape, and the gradient of an inclined edge is 1.5: 1.
5. The secondary sand accumulation prevention facility based on the wind break wall as claimed in claim 4, wherein: the sand intercepting ditch on the embankment is arranged at a position 1.5-2.5m away from the leeward side slope toe of the second retaining wall; the sand cutting ditch on the flat ground or the cutting is arranged at a position 1.5-2.5m away from the lee side of the second retaining wall.
6. The secondary sand accumulation prevention facility based on the wind break wall as claimed in claim 1, wherein: an inclined plate is arranged on a first wind screen wall arranged on the cutting.
7. The secondary sand accumulation prevention facility based on the wind break wall as claimed in claim 6, wherein: the included angle between the first wind-shield wall and the inclined plate is 120-150 degrees.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010209662.5A CN111425055A (en) | 2020-03-23 | 2020-03-23 | Secondary sand accumulation prevention facility based on wind-break wall |
| AU2020102367A AU2020102367A4 (en) | 2020-03-23 | 2020-09-22 | Facility for Preventing Sand from Depositing on Railway Track Based on Windbreak Wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010209662.5A CN111425055A (en) | 2020-03-23 | 2020-03-23 | Secondary sand accumulation prevention facility based on wind-break wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111425055A true CN111425055A (en) | 2020-07-17 |
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ID=71549393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010209662.5A Pending CN111425055A (en) | 2020-03-23 | 2020-03-23 | Secondary sand accumulation prevention facility based on wind-break wall |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111425055A (en) |
| AU (1) | AU2020102367A4 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030790A (en) * | 2020-07-20 | 2020-12-04 | 中国科学院西北生态环境资源研究院 | Wind and sand prevention device with curved surface net blocking structure and roadbed wind and sand protection system |
| CN112144464A (en) * | 2020-09-27 | 2020-12-29 | 中国科学院西北生态环境资源研究院 | Device and method suitable for preventing and treating wind, sand and dust on high-speed railway retaining wall road section |
| CN113202038A (en) * | 2021-05-28 | 2021-08-03 | 石河子大学 | Assembled embankment sand prevention device and sand cleaning early warning method using same |
| CN113250021A (en) * | 2021-03-31 | 2021-08-13 | 宁夏交通建设股份有限公司 | Desert abdominal region highway sand transportation water conservancy diversion sand control system |
-
2020
- 2020-03-23 CN CN202010209662.5A patent/CN111425055A/en active Pending
- 2020-09-22 AU AU2020102367A patent/AU2020102367A4/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030790A (en) * | 2020-07-20 | 2020-12-04 | 中国科学院西北生态环境资源研究院 | Wind and sand prevention device with curved surface net blocking structure and roadbed wind and sand protection system |
| CN112144464A (en) * | 2020-09-27 | 2020-12-29 | 中国科学院西北生态环境资源研究院 | Device and method suitable for preventing and treating wind, sand and dust on high-speed railway retaining wall road section |
| CN112144464B (en) * | 2020-09-27 | 2022-04-08 | 中国科学院西北生态环境资源研究院 | Device and method suitable for preventing and treating wind, sand and dust on high-speed railway retaining wall road section |
| CN113250021A (en) * | 2021-03-31 | 2021-08-13 | 宁夏交通建设股份有限公司 | Desert abdominal region highway sand transportation water conservancy diversion sand control system |
| CN113202038A (en) * | 2021-05-28 | 2021-08-03 | 石河子大学 | Assembled embankment sand prevention device and sand cleaning early warning method using same |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2020102367A4 (en) | 2020-11-05 |
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