CN210529629U - Debris flow drainage groove - Google Patents
Debris flow drainage groove Download PDFInfo
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- CN210529629U CN210529629U CN201921412517.6U CN201921412517U CN210529629U CN 210529629 U CN210529629 U CN 210529629U CN 201921412517 U CN201921412517 U CN 201921412517U CN 210529629 U CN210529629 U CN 210529629U
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Abstract
The utility model discloses a debris flow drainage groove has solved characteristics such as big, the impact force is strong to the debris flow velocity of flow, and there is easy abrasion, the security is low, the high problem of later maintenance expense in the kerve of current debris flow drainage groove. The utility model comprises a bottom groove and retaining walls, wherein the retaining walls are arranged at two sides in the debris flow channel, the bottom groove is vertically arranged in the debris flow channel and positioned between the retaining walls at two sides, the lower parts of the bottom groove and the retaining walls are deeply buried in the debris flow channel, and the bottom groove and the retaining walls are connected into a whole; the bottom grooves are symmetrically distributed along the center line of the debris flow channel in an inverted V-shaped mode, the top ends of the inverted V-shaped bottom grooves are located at the center line of the debris flow channel, the foundation of the lower portion of the bottom grooves is buried in a debris flow channel bed, and the cross section of the debris flow drainage groove is in a convex mode. The utility model discloses debris flow drainage groove is applicable to the debris flow channel that the channel slope is more than 10, and its application is simple, high-efficient, can satisfy geological disasters prevention needs.
Description
Technical Field
The utility model relates to a mud-rock flow prevention and cure engineering design application technical field, concretely relates to mud-rock flow drainage groove.
Background
In China, frequent geological disasters of debris flow occur, particularly in rainy seasons, surface runoff with a certain flow depth is formed by water catchments in a debris flow basin under the condition of heavy rainfall, loose solid matters in the debris flow basin are eroded, and the debris flow process is induced. The debris flow gully in the southwest area of China has the characteristics of large terrain gradient of a drainage basin, relatively small area of the drainage basin, large longitudinal gradient of the debris flow gully and the like, and seriously threatens city construction, traffic facilities and the like of the debris flow gully.
With the continuous development of national economy, under the environment of 'big western development' and 'one-by-one-way' and the environment, the traffic network and city construction in western mountainous areas of China is gradually improved, in order to ensure the economic construction of the western mountainous areas, the requirements and challenges for geological disaster prevention projects such as debris flows are increasingly strict, the characteristics of 'small and steep' in debris flow drainage areas of the western mountainous areas are combined, the debris flow prevention and control mode mainly comprises 'blocking, blocking and drainage', and the drainage and guide groove is a main prevention and control project of the debris flow 'drainage' prevention and control mode in the western mountainous areas of China.
At present, the cross section design of the debris flow drainage groove is mainly arc, trapezoid, rectangle, V-shaped and the combination of trapezoid and V-shaped, the drainage groove with different cross section designs has different characteristics, wherein the bottom groove design such as arc, trapezoid and rectangle causes the bottom groove to be easy to wear, the debris flow drainage groove with V-shaped bottom groove increases the flow depth of debris flow, accelerates the flow rate of debris flow, and is easy to generate convex accumulation at the groove mouth of the drainage groove, for example, according to the statistical analysis of the destruction form of the debris flow drainage groove by predecessors, the drainage groove with the debris flow erosion destruction mode at the bottom groove of the drainage groove accounts for 29%, and the drainage groove with the lump stone impact destruction mode accounts for 42%.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: to characteristics such as the mud-rock flow velocity of flow is big, the impact force is strong, and there is easy abrasion, the security is low, the high problem of later maintenance expense in the kerve of current mud-rock flow drainage groove, the utility model provides a solve a mud-rock flow drainage groove of above-mentioned problem, the utility model provides a drainage groove of design has reduced the velocity of flow of mud-rock flow, has reduced the wearing and tearing of mud-rock flow solid particle to the drainage groove, reduces the mud-rock flow and piles up at the notch to and reduced drainage groove later maintenance expense, provide prevention and cure engineering design for the prevention and cure of mud-rock flow.
The utility model discloses a following technical scheme realizes:
the debris flow drainage groove comprises a bottom groove and retaining walls, wherein the retaining walls are arranged on two sides in a debris flow channel, the bottom groove is vertically arranged in the debris flow channel and positioned between the retaining walls on the two sides, the lower parts of the bottom groove and the retaining walls are deeply buried in the debris flow channel, and the bottom groove and the retaining walls are connected into a whole; the bottom grooves are symmetrically distributed along the center line of the debris flow channel in an inverted V-shaped mode, the top ends of the inverted V-shaped bottom grooves are located at the center line of the debris flow channel, the foundation of the lower portion of the bottom grooves is buried in a debris flow channel bed, and the cross section of the debris flow drainage groove is in a convex mode.
The working principle is as follows: based on the existing arc, trapezoid and rectangular bottom groove design, the bottom groove is easy to wear, the debris flow drainage groove designed by the V-shaped bottom groove increases the depth of debris flow, accelerates the flow rate of the debris flow, and is easy to generate convex accumulation at the groove opening of the drainage groove, so that the problems of short service life and high later maintenance cost are solved; the flow velocity of the debris flow in the channel is distributed in a convex shape along the flow direction plane, wherein the flow velocity of the debris flow at the center of the channel is the largest, the flow velocity is in a decreasing trend towards the two sides of the channel, and the flow velocity of the debris flow and the flow depth of the debris flow are in an exponential function relationship. Based on the consideration, the utility model discloses in the aspect of the inverted "V" type included angle of the drainage groove bottom groove, the inverted "V" type included angle of the drainage groove bottom groove reflects the debris flow impact stress that the drainage groove bottom groove receives under the condition of different depths of flow, and the inverted "V" type included angle parameter characteristic of the drainage groove bottom groove quantitatively reflects the compressive stress that the inverted "V" type bottom groove receives; the utility model discloses contrast traditional drainage groove design, the drainage groove of "V" type kerve design falls, it distributes along drainage groove central line position to fall "V" type pointed end, can not only effectively reduce the stream depth that drainage groove central point put, moreover under mud-rock flow impact stress and dead weight stress condition, make the kerve structure by traditional receiving the shearing, tensile stress becomes compressive stress and is leading, effectively reduce mud-rock flow velocity of flow and mud-rock flow abrasion, the life of extension drainage groove, reduce the later maintenance expense.
The utility model discloses the stream depth that can not only effectual reduction mud-rock flow reduces the water conservancy radius of drainage groove cross section, reduces the mud-rock flow velocity of flow under the same mud-rock flow design flow condition, and the atress characteristic that can effectual change drainage groove kerve increases the life of drainage groove kerve, reduces the later maintenance cost moreover. The utility model discloses a be applicable to the area that the mud-rock flow channel slope is greater than 10, its application is simple, high-efficient, can satisfy geological disasters prevention needs.
Preferably, the cross section of the bottom groove is in an inverted V shape, the central convex included angle c of the inverted V-shaped bottom groove is less than 160 degrees, and the transverse horizontal included angle α of the bottom groove1Greater than 10.
Preferably, the retaining wall has a horizontal included angle α2Is 45-90 degrees.
Preferably, the retaining walls on the two sides in the debris flow channel are symmetrical along the center line of the debris flow channel.
Preferably, the material of mud-rock flow kerve and mud-rock flow retaining wall is reinforced concrete, and reinforced concrete material is anti-impact wear-resisting.
Preferably, retaining wall and drainage groove are the segmentation, and are provided with the subsiding crack between each section retaining wall and the drainage groove, and when one section retaining wall and drainage groove damaged, only need maintain this one section retaining wall and drainage groove like this, and be unlikely to make whole retaining wall all receive the influence, make things convenient for later maintenance.
Preferably, the debris flow discharge chute is adapted for debris flow channels having a channel slope of more than 10 °.
Specifically, the utility model discloses the kerve contained angle c design of debris flow drainage groove to and the horizontal contained angle α of retaining wall2The design is selected according to the debris flow accumulation slope angle, and the specific debris flow drainage groove design steps are as follows:
A. determining the unit weight gamma and the unit KN/m of the debris flow through the on-site actual measurement of the debris flow3(ii) a According to the field survey of the debris flow channel, determining the width 2d of the debris flow channel2The unit m; determining a debris flow channel slope by field measurement of a debris flow channelDegree β, in degrees;
B. determining the designed debris flow depth h at the central line of the drainage groove according to the design of the debris flow channel1And the designed flow depth (h) of the retaining wall of the debris flow drainage groove1+h2) The unit m, and the transverse horizontal included angle α of the bottom groove of the debris flow drainage groove is obtained by the following formula1；
α1＝arctan(h1/d2) (1)
(1) In the formula, because the silt stopping and piling slope of the debris flow is less than 10 degrees, the transverse horizontal included angle α of the debris flow drainage groove1The angle is more than 10 degrees, so that the phenomena of silt stopping and accumulation of debris flow in the drainage groove can be effectively prevented; obtaining the width of the debris flow drainage groove and the central line uplift height d according to the following formula2The relationship of (1);
h1＞0.176*d2(2)
C. determining the designed debris flow depth H in unit m at the designed position of the drainage groove according to the design of the debris flow channel; determining debris flow impact force F of the design position of the debris flow drainage groove in a unit KN according to debris flow disaster prevention engineering design specifications (DZ/T0220-2006);
the impact force F of the debris flow on the drainage groove when the flow depth H is designed is obtained through the following formula1And the impact force F of solid particles of the debris flow2The unit KN;
(3) in the formula, F1The unit KN is the integral impact pressure of the debris flow; f2The impact force of the debris flow solid particles is expressed in KN; gamma is the gravity of the debris flow and the unit kN/m3(ii) a v is the mud-rock flow velocity in units (m/s); g is gravity acceleration in m/s2(ii) a d is the particle size of solid particles of the debris flow, and the unit is mm;
is the included angle between the stress surface and the debris flow stamping direction, and is the unit degree; λ is a building shape coefficient, a circular building λ is 1.0,the λ of a rectangular building is 1.33, and the λ of a square building is 1.47; 1/n is the debris flow channel roughness coefficient; j is the longitudinal gradient of the debris flow channel, and the unit is thousandth; h is the designed flow depth of the debris flow channel, the unit m is the designed flow depth of the debris flow is an element (H)1，h1+(d1+d2)tanα1)；α1The horizontal included angle is unit degree; d1The single-side width of the bottom groove of the drainage groove is unit m; d1+d2Is the maximum single-side width of the drainage groove in m.
The utility model discloses have following advantage and beneficial effect:
1. the utility model relates to a drainage groove of the design of the inverted V-shaped bottom groove of a debris flow drainage groove, wherein the convex tips are distributed along the central line of the drainage groove, thereby not only effectively reducing the depth of the central position of the drainage groove, but also leading the bottom groove to be changed from the traditional shearing stress and the traditional tensile stress into the compressive stress under the conditions of debris flow impact stress and self-weight stress, effectively reducing the flow rate of the debris flow and the erosion of the debris flow, prolonging the service life of the drainage groove and reducing the later maintenance cost;
2. the utility model starts from the included angle between the debris flow drainage groove and the retaining wall, the unit cost of concrete and the like, and reflects the debris flow impact stress borne by the drainage groove bottom groove under the condition of different depths of flow by utilizing the inverted V-shaped included angle of the drainage groove bottom groove in the aspect of the convex included angle of the drainage groove bottom groove;
3. the utility model is suitable for a debris flow channel slope is greater than 10 areas, and its application is simple, high-efficient, can satisfy geological disasters prevention needs.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is the cross section plane of a debris flow drainage groove of the present invention is a schematic structural diagram of an inverted "V-shaped" bottom groove and a retaining wall.
Fig. 2 is the structure schematic diagram of the debris flow drainage groove longitudinally sloping along the debris flow channel.
Reference numbers and corresponding part names in the drawings:
1-retaining wall, 2-bottom groove and 3-settlement joint.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
As shown in fig. 1 and 2, the debris flow drainage groove comprises a bottom groove 2 and retaining walls 1, wherein the retaining walls 1 are arranged on two sides in a debris flow channel, the bottom groove 2 is vertically arranged in the debris flow channel and positioned between the retaining walls 1 on two sides, the bottom groove 2 and the retaining walls 1 are deeply buried in the debris flow channel, and the bottom groove 2 and the retaining walls 1 are connected into a whole; the bottom grooves 2 are symmetrically distributed in an inverted V shape along the center line of the debris flow channel, the top ends of the inverted V-shaped bottom grooves 2 are positioned at the center line of the debris flow channel, the lower part of the bottom grooves 2 is buried in a debris flow channel bed, and the cross section of the debris flow drainage groove is convex; the debris flow drainage groove is suitable for debris flow channels with channel gradient of more than 10 degrees.
The cross section of the bottom groove is inverted V-shaped, the included angle c of the central position of the inverted V-shaped bottom groove is less than 160 degrees, and the transverse horizontal included angle α of the bottom groove1Greater than 10 degrees, and a transverse horizontal included angle α of the retaining wall2Is 45-90 degrees.
The retaining walls on the two sides in the debris flow channel are symmetrical along the center line of the debris flow channel.
The material of mud-rock flow kerve and mud-rock flow retaining wall is reinforced concrete, and reinforced concrete material is anti-impact wear-resisting.
As shown in fig. 2, the retaining wall 1 and the drainage groove 2 are segmented, and a settlement joint 3 is arranged between each segment of the retaining wall 1 and the drainage groove 2, so that when one segment of the retaining wall 1 and the drainage groove 2 are damaged, only the retaining wall 1 and the drainage groove 2 are maintained, the whole retaining wall and the whole drainage groove are not affected, and the later maintenance is facilitated.
The utility model discloses a verify the practicality of falling "V" type drainage groove, select the high ditch of Wenchuan earthquake district for the example, high ditch is located the north side of ginkgo country, regains river right bank, and high ditch basin form is fan-shaped, and basin longitudinal length 3.26km, average width 1.3km, basin area 3.79km2. The maximum elevation of a drainage basin is 2877m, the minimum elevation is 1070.0m, the relative height difference is about 1807m, the average longitudinal slope of the channel is 538 per thousand, the width of the channel of a stacking area is about 15m, the depth of mud is about 1.5-2m, the longitudinal slope of the channel is about 260 per thousand, 3 days 7 and 3 months in 2011, the debris flow disasters are erupted again in a high ditch, and the disaster is about 42.58 multiplied by 104m3The mud-rock flow is started, wherein the mud-rock outflow ditch enters the regained river solid source amount to reach 40.37 multiplied by 104m3The average flow velocity of the debris flow is 7.67/s, and the peak flow rate of the flow is 221.43m3/s。
In order to meet the requirements of debris flow depth, the section area of the drainage groove is designed to be 28.8m2Namely, the width of the length of the row guide groove is 15m, the depth of the row guide groove is 2.5m, the design gradient of the longitudinal slope surface of the bottom groove (namely the gradient β of the debris flow channel) of the inverted V-shaped row guide groove is 15 degrees, and the design gradient of the cross section of the bottom groove (namely the transverse horizontal included angle α of the bottom groove)1) Is 10 degrees; according to the triangle law, the designed flow depth of the central position of the drainage groove is 1.2 m; according to the formula of the flow velocity of the debris flow, the flow velocity of the central line of the inverted V-shaped drainage groove is reduced to 5.45m/s, and the reduction is about 28.9 percent; according to the formula (3), the impact stress of the solid particles at the central line position of the inverted V-shaped discharge groove is reduced by about 28.9%, and the impact stress of the whole debris flow is reduced by about 49.5%.
Based on the utility model, the reversed V-shaped included angle c of the bottom groove of the drainage groove reflects the debris flow impact stress borne by the bottom groove of the drainage groove under the condition of different flow depths, and the parameter characteristic of the reversed V-shaped included angle of the bottom groove of the drainage groove quantitatively reflects the compressive stress borne by the convex bottom groove; use the utility model discloses a mud-rock flow drainage groove falls the velocity of flow of "V" type drainage groove center line position and reduces to 5.45m/s, reduces and is about 28.9%, and the solid particle impact stress who falls "V" type drainage groove center line position has reduced and has been about 28.9%, and the holistic impact stress of mud-rock flow has reduced and has been about 49.5%. Therefore, the utility model discloses can not only effectively reduce the stream depth that drainage groove central point put, moreover under mud-rock flow impact stress and dead weight stress condition for the kerve is cut by traditional, tensile stress becomes compressive stress and is given first place to, effectively reduces the velocity of flow and the mud-rock flow abrasion of mud-rock flow, prolongs the life of drainage groove, reduces the later maintenance expense. The utility model discloses a be applicable to the area that the mud-rock flow channel slope is greater than 10, its application is simple, high-efficient, can satisfy geological disasters prevention needs.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a mud-rock flow drainage groove which characterized in that: the soil-blocking wall structure comprises bottom grooves (2) and soil-blocking walls (1), wherein the soil-blocking walls (1) are arranged on two sides in a debris flow channel, the bottom grooves (2) are vertically arranged in the debris flow channel and positioned between the soil-blocking walls (1) on two sides, the lower parts of the bottom grooves (2) and the soil-blocking walls (1) are deeply buried in the debris flow channel, and the bottom grooves (2) and the soil-blocking walls (1) are connected into a whole; the bottom groove (2) is symmetrically distributed along the center line of the debris flow channel in an inverted V shape, the top end of the inverted V-shaped bottom groove (2) is positioned at the center line of the debris flow channel, the foundation of the lower part of the bottom groove (2) is buried in a debris flow channel bed, and the cross section of the debris flow drainage groove is in a convex shape.
2. A debris flow drainage groove according to claim 1, wherein: the cross section of the bottom groove (2) is inverted V-shaped, the included angle of the central line position of the inverted V-shaped bottom groove (2) is less than 160 degrees, and the horizontal included angle of the bottom groove (2) is greater than 10 degrees.
3. A debris flow drainage groove according to claim 1, wherein: the horizontal included angle of the retaining wall (1) is 45-90 degrees.
4. A debris flow drainage groove according to claim 1, wherein: the retaining walls (1) on two sides in the debris flow channel are symmetrical along the center line of the debris flow channel.
5. A debris flow drainage groove according to claim 1, wherein: the debris flow bottom groove (2) and the debris flow retaining wall (1) are made of reinforced concrete.
6. A debris flow drainage groove according to claim 1, wherein: the retaining wall (1) and the bottom groove (2) are provided with settlement joints (3) along the flow direction of the channels, and segmentation is carried out through the settlement joints (3).
7. A debris flow drainage groove according to claim 1, wherein: the debris flow drainage groove is suitable for debris flow channels with channel gradient of more than 10 degrees.
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| CN201921412517.6U CN210529629U (en) | 2019-08-28 | 2019-08-28 | Debris flow drainage groove |
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| CN201921412517.6U CN210529629U (en) | 2019-08-28 | 2019-08-28 | Debris flow drainage groove |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390745A (en) * | 2021-08-17 | 2021-09-14 | 中国科学院、水利部成都山地灾害与环境研究所 | Double-shaft rolling type device and method for testing abrasion resistance of channel section form capable of being simulated |
| CN113944140A (en) * | 2021-10-27 | 2022-01-18 | 浙江华东工程建设管理有限公司 | Scour protection hits drainage device suitable for high muddy stone stream calamity area bank slope formula pier |
-
2019
- 2019-08-28 CN CN201921412517.6U patent/CN210529629U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390745A (en) * | 2021-08-17 | 2021-09-14 | 中国科学院、水利部成都山地灾害与环境研究所 | Double-shaft rolling type device and method for testing abrasion resistance of channel section form capable of being simulated |
| CN113390745B (en) * | 2021-08-17 | 2021-11-09 | 中国科学院、水利部成都山地灾害与环境研究所 | Double-shaft rolling type device and method for testing abrasion resistance of channel section form capable of being simulated |
| CN113944140A (en) * | 2021-10-27 | 2022-01-18 | 浙江华东工程建设管理有限公司 | Scour protection hits drainage device suitable for high muddy stone stream calamity area bank slope formula pier |
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