CN102011356A

CN102011356A - Curved subgrade protection structure for controlling floods and debris flow

Info

Publication number: CN102011356A
Application number: CN 201010561191
Authority: CN
Inventors: 陈洪凯; 唐红梅; 刘丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-04-13

Abstract

The invention discloses a curved subgrade protection structure for controlling floods and debris flow, comprising a protection structure body arranged along a channel. The protection structure is characterized in that a groove is arranged at one side, facing the riverway, of the protection structure body; and the surface of the groove forms concave curved surface on the protection structure body. The protection structure has the following beneficial effects: obviously adjusting the flow directions of the floods and the debris flow, rapidly adjusting the floods and the debris flow rushing at the groove bank and throwing the floods and the debris flow to the main stream area of the channel to be drained and reducing the damage effect of the debris flow on the highway subgrade and pavement along the river.

Description

The curved surface subgrade protection structure of defending flood and mud-rock flow

Technical field

The present invention relates to a kind of flood control structure, relate in particular to the curved surface subgrade protection structure of a kind of defending flood and mud-rock flow.

Background technology

China is the country on mountain more than, territory total area belongs to mountain and hill more than 2/3rds, the mountain highway mileage is above 300,000 kilometers, highway flood and mud-rock flow the condition of a disaster are serious, as be located in the western Xinjiang north-south and cross over the national defence main line Tianshan Mountains highway in the Mountain Ranges of Tian Shan Mountains and exist cumulative length to surpass 400 kilometers mud-stone flow disaster highway section, surplus Sichuan Wenchuan earthquake district high-grade highway big flood along the line and the heavy calamity of mud-rock flow put 8000.

The bending of mountain highway river course, flood and mud-rock flow solid-liquid two-phase flow motion path diameter feature cause the roadbed along the river of river, position place bend very easily to be subjected to impacting damage (Fig. 1), subgrade and pavement destroy by rush of water totally (Fig. 2) when serious.According to the preliminary statistics, annual rainy season, highway in China big flood and mud-rock flow the condition of a disaster were lost nearly 3,000,000,000 yuan, damage engineering directly the reparation funds above 1,000,000,000 yuan.Therefore, effectively prevent and treat mountain highway flood and mud-stone flow disaster and belong to national demand.

At present, mountain highway flood and mud-rock flow guard technology mainly contain as the gravity concrete guard wall (Fig. 3) of permanent measure with as the gabion of temporary measure, wooden hurdle gabion (Fig. 4), its method for designing is comparative maturity, to the gravity concrete guard wall, emphasize that embedded depth of foundation should be lower than more than the river limiting scour 1.5m.Yet a large amount of disaster cases show that temporary preventive measure can only play the effect of the passive adjusting flood and the mud-rock flow flow direction, and the impact resistance extreme difference is rebuild the frequency height, almost repeats every year to build; It is stronger that gravity concrete guard wall anti-impact is ruined ability, but at flood and mud-rock flow burst period, flood and debris flow body are easy to pour the road surface vertically upward and seriously damage the road surface and suspend traffic, it is limited that adjusting flood and mud-rock flow flow to yardstick, debris flow body is easy to become silted up in the river course and buries, and becomes pregnant important thing source of giving a mud-rock flow.

Summary of the invention

In order to solve the problem in the background technology, the present invention proposes the curved surface subgrade protection structure of a kind of defending flood and mud-rock flow, the safeguard structure body that comprises road setting along the river, its improvement is: on the safeguard structure body towards the side in river course, groove is set, and flute surfaces forms the curved surface of indent on the safeguard structure body.

Described curved surface is a wherein leaf curved surface of sphere, anchor ring or hyperboloid of two sheets.

The solid section of safeguard structure body, littoral sloping bearing of trend length a is 5 ~ 20m, the horizontal width maximum line length b=3 ~ 4m of the vertical water front of safeguard structure body, the vertical height h of safeguard structure body is with the riverbed height change.

At groove middle part, the road bearing of trend is provided with many anchor poles along the river, and the anchored end of anchor pole is imbedded in the basement rock behind the safeguard structure body, and the exposed end of many anchor poles is in same horizontal plane.

Useful technique effect of the present invention is: significantly regulate flood and mud-rock flow and flow to, be thrown to the channel thread zone and drain rushing at the flood of ditch bank and debris flow body quick adjustment, alleviate the damage effect that mud-rock flow causes highway subgrade road surface along the river.

Description of drawings

Fig. 1, mountain area be highway flood and mud-rock flow movement path schematic diagram along the river;

Fig. 2, mountain area highway flood and mud-rock flow damage along the river the condition of a disaster is photo on the spot;

Fig. 3, highway gravity revetment retaining wall safeguard structure photo along the river;

Fig. 4, highway wood hurdle gabion safeguard structure photo along the river;

Fig. 5, mountain area be highway tradition safeguard structure schematic diagram along the river;

The hyperbolic subgrade protection structural representation of Fig. 6, defending flood of the present invention and mud-rock flow;

The hyperbolic subgrade protection structural anchor bar position schematic perspective view of Fig. 7, defending flood of the present invention and mud-rock flow;

The hyperbolic subgrade protection structural anchor bar position side schematic view of Fig. 8, defending flood of the present invention and mud-rock flow;

The hyperbolic subgrade protection structure function principle schematic of Fig. 9, defending flood of the present invention and mud-rock flow;

Figure 10, hyperboloid of two sheets pictorial diagram;

Figure 11, safeguard structure body arrangement of reinforcement schematic diagram of the present invention.

The specific embodiment

Structure of the present invention is: comprise the safeguard structure body 1 of road setting along the river, towards a side in river course, groove 2 is set on safeguard structure body 1, groove 2 surfaces form the curved surface of indent on safeguard structure body 1.This groove 2 is parabola or similar parabolical curve along the length of safeguard structure body 1 or the intersection on arbitrary cross section on the width and groove 2 surfaces.

The curved surface subgrade protection structure of defending flood of the present invention and mud-rock flow is arranged on along the river the highway concave bank and is subject to flood and mud-rock flow impacts the position of damaging, when flood or mud-stone flow disaster take place after, current or mud-rock flow collide on the

safeguard structure body

1,2 pairs of current of the groove of curved surface form or mud-rock flow play guide effect, be thrown into current or mud-rock flow in the river course again, avoided highway to be destroyed by rush of water, safeguard structure body 1 can not be damaged yet; Its form of construction work is:

1) installation position of the hyperbolic subgrade protection structure of defending flood and mud-rock flow is determined in field investigation, generally should and be subject to flood and mud-rock flow impacts the highway section of damaging at the river course concave bank, investigates thoroughly the river maximum erosion line degree of depth.

2) according to the orographic condition that surveys the position, determine the safeguard structure size: the length of the littoral sloping bearing of trend of the solid section of safeguard structure body 1 aThe horizontal width of=5～20m, vertical water front b=3～4m, highly hDetermine apart from the height in riverbed according to the road surface

3) hyperbolic subgrade protection structure is seen Figure 11 with reference to arrangement of reinforcement.

4) architecture basics is built in artificial grooving, and foundation bottom places the following 1.5～2.0m of river course maximum erosion line, and the basis enlarges the basis for rigidity, and masonry material is the building stones that are easy to gather materials on the spot.

Get 5m when 5) length of the littoral sloping bearing of trend of structure of the present invention is less than 5m, get 20m and segmentation setting when surpassing 20m, highly surpass after the 10m, lay row's anchor pole 3 at the new construction middle part, anchor pole 3 spacings 2.5～3.5m, anchor head is enclosed in the new construction concrete, guarantees the new construction self stability, and anchor pole 3 designs (seeing Fig. 7,8) according to existing concerned countries technical specification.

6) follow the construction technology of " green concrete slurry → vibration compacting that foundation excavation and construction → basic top formwork → frame is upright, colligation or welded reinforcement cage → injection label are not less than C20 solidifies → form removal ".

7) after curved surface subgrade protection structure building was finished, fetch earth on the spot backfill structure rear portion and space, both sides made new construction and ditch bank become integral body, brought into play new construction defending flood and mud-rock flow, guaranteed road structure safety and highway driving safety effect along the river.

The curved surface of described groove 2 can be from as choosing the lower surface camber, sphere, anchor ring (anchor ring is: circle in same plane with the surfaces of revolution of its disjoint straight line rotation gained) or hyperboloid.When choosing sphere or anchor ring as groove 2 curved surfaces, its size is symmetry comparatively, and it is comparatively convenient to construct; When choosing hyperboloid as groove 2 curved surfaces, the radian of its curved surface can be regulated, hyperboloid can adopt a wherein leaf curved surface (see figure 10) of hyperboloid of two sheets, if will adjust the radian of curved surface, the position, summit (the intersection point A of Figure 10 mean camber and Z axle is the curved surface summit) of adjusting curved surface gets final product; If will make the radian symmetry of curved surface, can make the summit of curved surface be positioned at groove 2 bottom centre positions, the openend of curved surface is towards the river course.

The curved surface of described groove 2 can also be the part surface of curved surface post, and described curved surface post is that cross section is round, and the track in the center of circle of each cross section is circle or parabolical cylinder.

Claims

1. the curved surface subgrade protection structure of defending flood and mud-rock flow, the safeguard structure body (1) that comprises road setting along the river, it is characterized in that: in the last side of safeguard structure body (1) towards the river course, groove (2) is set, and the curved surface that forms indent is gone up on groove (2) surface at safeguard structure body (1).

2. the curved surface subgrade protection structure of defending flood according to claim 1 and mud-rock flow is characterized in that: described curved surface is a wherein leaf curved surface of sphere, anchor ring or hyperboloid of two sheets.

3. the curved surface subgrade protection structure of defending flood according to claim 1 and 2 and mud-rock flow, it is characterized in that: the solid section of safeguard structure body (1), littoral sloping bearing of trend length a is 5 ~ 20m, the horizontal width maximum line length b=3 ~ 4m of the vertical water front of safeguard structure body (1), the vertical height h of safeguard structure body (1) is with the riverbed height change.

4. the curved surface subgrade protection structure of defending flood according to claim 1 and 2 and mud-rock flow, it is characterized in that: at groove (2) middle part, along the river the road bearing of trend is provided with many anchor poles (3), the anchored end of anchor pole (3) is imbedded in the basement rock behind the safeguard structure body (1), and the exposed end of many anchor poles (3) is in same horizontal plane.