CN111321705A - Construction method of debris flow blocking dam - Google Patents
Construction method of debris flow blocking dam Download PDFInfo
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- CN111321705A CN111321705A CN202010146922.9A CN202010146922A CN111321705A CN 111321705 A CN111321705 A CN 111321705A CN 202010146922 A CN202010146922 A CN 202010146922A CN 111321705 A CN111321705 A CN 111321705A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
- E02B3/26—Fenders
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
- E02B8/023—Arresting devices for waterborne materials
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/04—Valves, slides, or the like; Arrangements therefor; Submerged sluice gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B2201/00—Devices, constructional details or methods of hydraulic engineering not otherwise provided for
- E02B2201/04—Devices, constructional details or methods of hydraulic engineering not otherwise provided for using old tires for hydraulic engineering
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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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a construction method of a debris flow blocking dam, wherein bottom drainage openings (2) are formed in the bottom of a masonry blocking dam (1) at intervals, dam body drainage holes (4) are formed in the dam body of the masonry blocking dam (1) at intervals, and top drainage piles are formed in the upper part of the masonry blocking dam (1) at intervals; a rigid mesh sheet-sandwiched gravel flexible water-permeable body (6) is constructed at the middle upper part in the dam body of the masonry stone blocking dam (1); a plurality of closely arranged waste tires (3) are arranged on the upstream face of the masonry dam (1); the bottom of the masonry blocking dam (1) is provided with anti-sliding teeth (7) poured by concrete, and the anti-sliding teeth (7) are poured in anti-sliding tooth open grooves dug by dam feet of the masonry blocking dam (1). The invention not only increases the flexibility of the dam body, but also has good water permeability, can quickly permeate and discharge water bodies in debris flow blocking and accumulating bodies, ensures the safety and stability of the blocking and accumulating bodies, and further reduces or eliminates the harm of debris flow.
Description
Technical Field
The invention relates to a rock flow retaining dam and a construction method thereof, belongs to the technical field of civil engineering technology and mountain disaster prevention and control engineering, is suitable for retaining possible debris flow in an area where debris flow is easy to occur at the upstream of important buildings such as a tailing pond or a bridge, a railway, an expressway and the like so as to avoid damage to the tailing pond or the important buildings, and is particularly suitable for constructing the debris flow retaining dam at the upstream of the tailing pond in a valley.
Background
The debris flow refers to a mountain area or other gullies and deep ravines, and a region with dangerous terrain, because of the landslide caused by rainstorm, snowstorm or other natural disasters and the special flood flow carrying a large amount of silt and stones, because of the strong impact and silting capabilities, and the characteristics of high abruptness, high flow rate, large material capacity, strong destructive power and the like, serious disasters are often caused in the circulation and accumulation area, and the flow often destroys the traffic facilities such as roads, railways and the like, even villages and towns and the like, so that huge losses are caused.
In order to reduce damage caused by debris flow disasters, debris flow blocking structures are generally arranged in valleys or deep gullies of debris flow regions, and most commonly, the debris flow blocking structures are debris flow blocking dams, which can not only block and store part of debris flow solid-phase substances to reduce the scale of debris flow, but also stabilize the gullies, control channel erosion and inhibit the development of debris flow.
Existing debris flow barrages typically use only a single material and process. The barrage can be divided into three categories according to the difference of materials and processes: in the first type of concrete pouring, the dam body is completely poured by adopting concrete only, and the concrete is transported to a construction site from the outside of the trench, so that the construction cost is high; the second type is a masonry type, the dam body is built by only masonry stones, local materials can be obtained, the construction cost is low, but the masonry stones are easy to have the phenomena of dislocation and pulling, insufficient grouting or insufficient stone strength in the construction process, and the like, and the overall safety performance of the dam body can be influenced; the third type is a reinforced concrete mixed type, the dam body is completely of a reinforced concrete pouring structure, the problem of block impact force damage resistance of the traditional blocking dam can be effectively solved to a great extent, but the manufacturing cost is increased by times, the construction requirement is high, the transportation cost is high, and therefore large-scale popularization and construction cannot be achieved.
At present, most of common dam body structures are rigid dam structures made of masonry or concrete as main materials. However, although the rigid retaining dam structure has the advantage of high strength, the rigid retaining dam structure is easy to be damaged by impact under the action of strong impact force of debris flow and flows downstream along with the debris flow due to the characteristics of high flow speed, large volume and solid-liquid mixing of the debris flow, so that debris flow disasters can be increased.
In the article of the optimized design of the debris flow retaining dam published in the 2 nd phase of 2009, geological disasters and environmental protection of Chinese journal, a plan view of a typical debris flow retaining dam is disclosed, and as can be seen from the plan view, in order to prevent and treat the damage of upstream debris flow to downstream urban areas, 7 debris flow retaining dams are arranged, so that the construction cost is very high, and the maintenance and the use are inconvenient.
Disclosure of Invention
The invention aims to provide a construction method of a debris flow retaining dam, which can effectively reduce the impact energy of debris flow and increase the water permeability of a dam body, so as to eliminate the damage of the debris flow to the downstream major construction engineering, aiming at the problems that the existing debris flow rigid retaining dam is easy to be damaged by impact, and the conventional debris flow retaining dam is high in construction cost and inconvenient to maintain and use.
In order to achieve the above purpose, the construction method of the debris flow blocking dam of the present invention is implemented by adopting the following technical scheme:
1) firstly, carrying out detailed mud-rock flow material source investigation, catchment area calculation and geotechnical engineering investigation of a dam site area on an upstream gully area of a planned masonry dam, finding out geological conditions of stratum engineering in the area, and obtaining various parameters and geotechnical mechanical indexes required by design calculation.
2) Then, floating soil of a dam foot and a dam abutment is cleaned at the dam site of the planned masonry blocking dam, and an anti-slip tooth grooving groove is excavated on the dam foot of the planned masonry blocking dam; the depth of the anti-sliding tooth grooving is not less than 0.5m, and the width of the anti-sliding tooth grooving is not less than 0.5 m.
3) The anti-sliding teeth of the concrete structure are cast in situ in the anti-sliding tooth grooving grooves, and the purpose of the anti-sliding teeth is to ensure that the masonry blocking dam is firmly combined with the foundation; carrying out masonry construction of a stone masonry retaining dam on the anti-sliding teeth and the grooves;
in the construction of the stone masonry dam, a bottom drainage port is reserved at the bottom of the dam body, and an anti-clogging reinforcing steel bar mesh is arranged at an upstream water inlet of the bottom drainage port; dam body water drainage holes are formed in the dam body of the masonry blocking dam at intervals, top drainage piles are arranged on the upper portion of the masonry blocking dam at intervals, the arrangement of the drainage piles can increase the drainage capacity of the dam body, and the danger of flood overflowing from the angle of the structure of the dam body when the water level is high is avoided; a rigid mesh sheet is constructed on the middle upper part in the masonry dam body, and a gravel flexible water permeable body is clamped by the gravel, and the gravel flexible water permeable body naturally drains water by utilizing holes filled with the gravel; the bottom water discharge opening, the dam body water discharge hole, the rigid mesh sheet clamped gravel flexible water permeable body and the top water discharge stack jointly form a debris flow blocking dam water discharge system from bottom to top.
4) After the masonry of the masonry stone blocking dam is finished, a flexible anti-collision protective layer formed by a plurality of closely-arranged waste tires is arranged on the upstream water facing surface of the masonry stone blocking dam, and the elasticity of the rubber tires is utilized to protect the dam body from being damaged by direct impact.
The abandoned tire is hung on the anchoring reinforcing steel bar laid on the upstream face of the masonry dam, and the tire has the advantages of itself as a flexible anti-collision measure and is expressed as follows: the tire is of a round hollow structure, and has good buffering and energy absorbing effects; the arc-shaped structures of the hollow part and the side surface of the tire have small influence on the drain hole of the dam body, and can ensure the smooth drainage operation of the drain hole; the rubber material has stable performance, the waste tire is easy to obtain, and the cost is low.
5) And constructing a concrete drainage bottom plate for drainage and flood discharge of the dam body in a natural valley at the downstream of the dam face of the masonry stone blocking dam, wherein the concrete drainage bottom plate is connected with the anti-sliding teeth poured in the anti-sliding tooth opening grooves excavated at the dam feet of the masonry stone blocking dam to form an integral structure. The concrete drainage bottom plate can ensure that the downstream bottom soil of the dam face of the stone masonry retaining dam is not washed out in the drainage and flood discharge processes, and is convenient for drainage and flood discharge of the dam body.
Furthermore, the rigid mesh sheet-gravel-sandwiched flexible water permeable body comprises 3 rigid mesh sheets with different rigidity characteristics, the first layer from the upstream surface is a large-specification rigid mesh sheet, the second layer from the upstream surface is a medium-specification rigid mesh sheet, the third layer from the upstream surface is a small-specification rigid mesh sheet, pebble or block stone filling bodies with the bulk degree of 15-20 cm are filled between the large-specification rigid mesh sheet and the medium-specification rigid mesh sheet, and pebble or gravel filling bodies with the grain grade of 5-10 cm are filled between the medium-specification rigid mesh sheet and the small-specification rigid mesh sheet.
In order to improve the overall strength of the steel meshes, channel steel is welded at the middle parts and the upper parts of the large-specification steel meshes, the medium-specification steel meshes and the small-specification steel meshes, and each channel steel is directly built in the top of the masonry stone blocking dam and extends into the dam body of the masonry stone blocking dam by a certain anchoring depth; the lower parts of the large-specification rigid net sheets, the middle-specification rigid net sheets and the small-specification rigid net sheets are grouted by cement mortar to compact the pores.
Theoretical calculation and experimental verification prove that in order to ensure effective flood discharge in heavy rain seasons, the specifications and the sizes of the bottom water discharge opening, the dam body water discharge hole and the top water discharge stack are designed as follows: the bottom water outlet is rectangular, the width is 0.3-0.5 m, and the height is 0.4-0.6 m; the gradient of the dam body water outlet is not less than 15 degrees, the horizontal spacing of the dam body water outlet is 0.8-1.2 m, the vertical spacing is 0.8-1.2 m, and the aperture of the dam body water outlet is 70-90 mm; the stack height of the top drainage stack is 0.4-0.7 m, and the stack width is 0.35-0.6 m. Test results show that the water drainage and flood discharge effects are optimal and debris flow can be effectively blocked by the aid of the specifications and the size design and matching of pebble or block stone filling bodies with the block degrees of 15-20 cm and pebble or broken stone filling bodies with the grain grades of 5-10 cm respectively filled in the rigid mesh sheet clamped broken stone flexible water permeable bodies.
Theoretical calculation and experimental research also determine the optimal technical parameters that the width of a drain opening at the bottom is 0.4m, the height of the drain opening at the bottom is 0.5m, DN80PVC pipes are adopted for drain holes of the dam body, the horizontal distance between the drain holes is 1m, the vertical distance between the drain holes is 1m, the stack height of a top drainage stack is 0.5m, the stack width is 0.4m, HBR400 phi 20 steel bar net sheets are adopted for large-size rigid net sheets, the hole pitch of the net sheets is 15cm 8615 cm, HBR400 phi 16 steel bar net sheets are adopted for medium-size rigid net sheets, the hole pitch of the net sheets is 5cm × cm, HBR400 phi 8 steel bar net sheets are adopted for small-size rigid net sheets, and the hole pitch of the net sheets is 2cm ×.
According to the construction method of the debris flow retaining dam, the flexibility of the dam body is increased, the impact energy of debris flow can be effectively reduced, the water permeability of the dam body can be improved, water in debris flow accumulated in front of the dam in a retaining mode can be smoothly discharged, the safety and stability of the retaining dam are guaranteed, and therefore the damage of debris flow is reduced or eliminated.
After the technical scheme is adopted, the construction method of the debris flow blocking dam has the following beneficial effects:
(1) the invention arranges the waste tire protective layer on the upstream water surface of the debris flow blocking dam. Under the protection of the elastic action of the tire, the impact force of the debris flow is absorbed, so that the impact force of the solid-liquid mixture of the debris flow directly impacting on the masonry dam body is greatly reduced, the tire covers the upstream surface of the dam body, the influence on the plugging of the bottom water outlet and the water outlet is limited, and the water permeability of the dam body can be ensured.
(2) The invention is beneficial to adjusting the rigidity of the whole dam body by arranging the rigid net sheets on the middle upper part of the dam body to clamp the gravel and the flexible water permeable body, three layers of net sheets with various rigidity characteristics and then clamping the gravel in the middle. The arrangement can increase the flexibility of the dam body, and more absorb the impact force of debris flow on the dam body with larger deformation characteristic; and compared with the original dam body structure, the rigid mesh sheet flexible water permeable body with gravels sandwiched therebetween greatly increases the water permeable capacity, so as to be beneficial to the safety and stability of the dam body.
(3) The invention relates to a construction method of a debris flow retaining dam, and the combined structure and parameter design are adopted, so that a novel dam body structure of the debris flow retaining dam is provided for the first time at home and abroad, can play a reference role for the same trip at home and abroad, is applied to similar mountain debris flow treatment engineering projects, and can generate huge social benefits.
Drawings
Fig. 1 is a schematic elevation view of a debris flow retaining dam structure constructed by the debris flow retaining dam construction method of the present invention;
FIG. 2 is a schematic sectional view of a debris flow retaining dam constructed according to the method for constructing a debris flow retaining dam of the present invention;
fig. 3 is a schematic diagram of a rigid mesh sheet-gravel-sandwiched flexible water-permeable body adopted at the upper part of a dam body of a debris flow retaining dam constructed by the debris flow retaining dam construction method of the present invention.
The reference signs are: 1-masonry stone blocking dam; 2-a bottom water discharge opening; 3-discarding the tyre; 4-dam body water drainage holes; 5-top drainage stack; 6-rigid type net piece clamped gravel flexible water permeable body; 7-anti-sliding tooth grooves; 8-concrete drainage bottom plate; 9-large-size rigid mesh sheets; 10-medium size rigid mesh sheet; 11-small gauge rigid mesh; filling 12-15-20 cm pebble or block stones; 13-5-10 cm pebble or gravel filling body.
Detailed Description
To further describe the present invention, the method for constructing a debris flow barrage according to the present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, which is a schematic elevation view of a debris flow retaining dam structure constructed by the method for constructing a debris flow retaining dam according to the present invention, and as shown in fig. 2 and 3, the method for constructing a debris flow retaining dam according to the present invention employs the following construction scheme:
1) firstly, carrying out detailed mud-rock flow material source investigation, catchment area calculation and geotechnical engineering investigation of a dam site area on an upstream valley area of a planned masonry dam 1, finding out the geological conditions of the stratigraphic engineering of the area, and obtaining all parameters and geotechnical physical mechanical indexes required by design calculation;
2) then, floating soil of a dam foot and a dam abutment is cleaned at the dam site of the planned masonry blocking dam 1, and an anti-slip tooth grooving groove is excavated on the dam foot of the planned masonry blocking dam 1; the depth of the anti-sliding tooth groove is not less than 0.5m, and the width of the anti-sliding tooth groove is not less than 0.5 m;
3) casting the anti-sliding teeth 7 of the concrete structure in situ in the anti-sliding tooth grooving grooves, and performing masonry construction of the stone masonry retaining dam 1 on the anti-sliding tooth grooving grooves and the anti-sliding teeth 7;
in the construction of the masonry dam 1, a bottom drainage opening 2 is reserved at the bottom of the dam body, the drainage opening 2 is generally rectangular and can be designed to be 0.4m wide and 0.5m high, and an anti-clogging reinforcing steel bar net piece is arranged at an upstream water inlet of the bottom drainage opening 2; dam body water outlet holes 4 are formed in the dam body of the masonry blocking dam 1 at intervals, DN80PVC pipes are adopted for the dam body water outlet holes 4, the horizontal distance between every two water outlet holes 4 is 1m, the vertical distance between every two water outlet holes 4 is 1m, the water outlet holes 4 are arranged in a plum blossom shape, and the gradient of the dam body water outlet holes 4 is not less than 15 degrees; top drainage piles 5 are arranged at intervals on the upper part of the masonry blocking dam 1, the pile height of each top drainage pile 5 is 0.5M, the pile width is 0.4M, the pile openings are built uniformly and smoothly, and the pile opening surface M10 mortar is plastered; a rigid mesh sheet and gravel flexible water-permeable body 6 is constructed at the middle upper part in the body of the stone masonry barrage 1; the rigid mesh piece gravel-sandwiched flexible water permeable body 6 comprises 3 rigid mesh pieces with different rigidity characteristics, the first layer from the upstream surface is a large-specification rigid mesh piece 9, the second layer from the upstream surface is a medium-specification rigid mesh piece 10, the third layer from the upstream surface is a small-specification rigid mesh piece 11, pebble or block stone filling bodies 12 with the block size of 15-20 cm are filled between the large-specification rigid mesh piece 9 and the medium-specification rigid mesh piece 10, pebble or gravel filling bodies 13 with the grain size of 5-10 cm are filled between the medium-specification rigid mesh piece 10 and the small-specification rigid mesh piece 11, and the filling requires that the construction process is naturally filled and compacted without vibrating or rolling.
The large-specification steel mesh 9 is an HBR400 phi 20 steel mesh, the mesh hole pitch is 15cm × 15cm, the middle-specification steel mesh 10 is an HBR400 phi 16 steel mesh, the mesh hole pitch is 5cm × 5cm, the small-specification steel mesh 11 is an HBR400 phi 8 steel mesh, the mesh hole pitch is 2cm × 2cm, channel steel is welded at the middle part and the upper part of the large-specification steel mesh 9, the middle-specification steel mesh 10 and the small-specification steel mesh 11, each channel steel is directly built in the top of the masonry dam 1 and penetrates into the dam body of the masonry dam 1 to a certain anchoring depth, the steel mesh (steel mesh) and the steel mesh) are required to be subjected to anti-corrosion treatment in the middle specification, the large-specification steel mesh 9, the middle-specification steel mesh 10 and the small-specification steel mesh 11 are tightly grouted, and the gaps are densely filled with 8# steel mesh and large-specification steel mesh 9, 6.5.5 steel mesh and the middle-specification steel mesh 10, and the small-specification steel mesh 11 are welded in the channel steel mesh.
4) After the masonry stone blocking dam 1 is built, a flexible anti-collision protective layer formed by a plurality of closely-arranged waste tires 3 is arranged on the upstream face of the masonry stone blocking dam 1, and the waste tires 3 are hung on anchoring steel bars arranged on the upstream face of the masonry stone blocking dam 1. Namely, the steel bars are anchored on the upstream face of the stone masonry dam 1, then the waste tires 3 are hung more closely, and the elasticity of the rubber tires is utilized to protect the dam body from being damaged by direct impact.
5) And constructing a concrete drainage bottom plate 8 for drainage and flood discharge of the dam body in a natural valley at the downstream of the dam surface of the masonry dam 1, wherein the concrete drainage bottom plate 8 is connected with anti-sliding teeth 7 poured in anti-sliding tooth opening grooves excavated at the dam feet of the masonry dam 1 to form an integral structure.
According to the construction method of the debris flow retaining dam, in the process of constructing the dam body of the debris flow masonry retaining dam 1, the flexible anti-collision protective layer formed by the plurality of closely-arranged waste tires 3 and the rigid net piece-sandwiched gravel flexible water permeable body 6 arranged at the middle upper part of the dam body are distributed on the upstream water-facing surface of the masonry retaining dam 1, so that the flexibility of the dam body is adjusted and increased, the impact force of debris flow is absorbed and weakened, the debris flow retaining dam has good water permeability, water bodies in debris flow retaining deposits can be quickly permeated and discharged, the safety and stability of the retaining dam are guaranteed, and the hazard of debris flow is reduced or eliminated.
The debris flow retaining dam constructed by the method is applied to debris flow mountain valley areas at the upstream of a certain large-scale tailing pond in the south in China, and application results show that the constructed debris flow retaining dam construction method is tested in case of heavy rain in 500 years, debris flow disasters are effectively prevented, and the operation safety of the large-scale tailing pond is ensured.
Claims (6)
1. A construction method of a debris flow blocking dam is characterized by adopting the following technical scheme:
1) firstly, carrying out detailed mud-rock flow material source investigation, catchment area calculation and geotechnical engineering investigation of a dam site area on an upstream valley area of a planned masonry dam (1), finding out the geological conditions of the stratigraphic engineering of the area, and obtaining all parameters and geotechnical physical mechanical indexes required by design calculation;
2) then, floating soil of a dam foot and a dam shoulder of the dam site of the planned masonry blocking dam (1) is cleaned, and an anti-slip tooth grooving groove is excavated in the dam foot of the planned masonry blocking dam (1); the depth of the anti-sliding tooth groove is not less than 0.5m, and the width of the anti-sliding tooth groove is not less than 0.5 m;
3) casting anti-sliding teeth (7) of a concrete structure in situ in the anti-sliding tooth grooving grooves, and performing masonry construction of the masonry blocking dam (1) on the anti-sliding tooth grooving grooves and the anti-sliding teeth (7);
in the construction of the masonry blocking dam (1), a bottom drainage opening (2) is reserved at the bottom of the dam body, and an anti-clogging reinforcing steel bar mesh is arranged at an upstream water inlet of the bottom drainage opening (2); dam body water drainage holes (4) are formed in the dam body of the masonry blocking dam (1) at intervals, and top drainage piles (5) are arranged on the upper portion of the masonry blocking dam (1) at intervals; a rigid mesh sheet-sandwiched gravel flexible water-permeable body (6) is constructed at the middle upper part in the dam body of the masonry stone blocking dam (1);
4) after the masonry stone blocking dam (1) is built, a flexible anti-collision protective layer formed by a plurality of closely-arranged waste tires (3) is arranged on the upstream face of the masonry stone blocking dam (1);
5) a concrete water drainage bottom plate (8) for drainage and flood discharge of a dam body is constructed in a natural valley of the downstream of the dam face of the masonry blocking dam (1), and the concrete water drainage bottom plate (8) is connected with anti-sliding teeth (7) poured in anti-sliding tooth opening grooves dug in dam feet of the masonry blocking dam (1) to form an integral structure.
2. The method for constructing a debris flow barrage according to claim 1, wherein: the rigid mesh piece gravel-sandwiched flexible water permeable body (6) comprises 3 rigid mesh pieces with different rigidity characteristics, the first layer from the upstream surface is a large-specification rigid mesh piece (9), the second layer from the upstream surface is a medium-specification rigid mesh piece (10), the third layer from the upstream surface is a small-specification rigid mesh piece (11), pebble or stone block filling bodies (12) with the block degree of 15-20 cm are filled between the large-specification rigid mesh piece (9) and the medium-specification rigid mesh piece (10), and pebble or gravel filling bodies (13) with the grain level of 5-10 cm are filled between the medium-specification rigid mesh piece (10) and the small-specification rigid mesh piece (11).
3. The method for constructing a debris flow barrage according to claim 2, wherein: the waste tires (3) are hung on anchoring reinforcing steel bars arranged on the upstream face of the masonry dam (1).
4. A method of constructing a debris flow barrage as claimed in claim 2 or 3, wherein: channel steel is welded at the middle part and the upper part of the large-specification rigid net piece (9), the medium-specification rigid net piece (10) and the small-specification rigid net piece (11), and each channel steel is directly built in the top of the masonry blocking dam (1) and extends into the dam body of the masonry blocking dam (1) by a certain anchoring depth; the lower parts of the large-specification rigid mesh (9), the middle-specification rigid mesh (10) and the small-specification rigid mesh (11) are grouted by cement mortar to compact the pores.
5. The method for constructing a debris flow barrage according to claim 4, wherein: the bottom water discharge opening (2) is rectangular, and is 0.3-0.5 m wide and 0.4-0.6 m high; the gradient of the dam body water outlet (4) is not less than 15 degrees, the horizontal spacing of the dam body water outlet (4) is 0.8-1.2 m, the vertical spacing is 0.8-1.2 m, and the aperture of the dam body water outlet (4) is 70-90 mm; the top drainage stack (5) is 0.4-0.7 m in stack height and 0.35-0.6 m in stack width.
6. The method for constructing the debris flow barrage according to claim 5, wherein the width of the bottom drainage opening (2) is 0.4m, the height of the bottom drainage opening is 0.5m, DN80PVC pipes are adopted for the drainage holes (4) of the dam body, the horizontal distance between the drainage holes (4) is 1m, the vertical distance between the drainage holes (4) is 1m, the stacking height of the top drainage stack (5) is 0.5m, and the stack width is 0.4m, the large-size rigid mesh (9) is an HBR400 phi 20 steel bar mesh, the mesh hole distance is 15cm × 15cm, the medium-size rigid mesh (10) is an HBR400 phi 16 steel bar mesh, the mesh hole distance is 5cm × 5cm, the small-size rigid mesh (11) is an HBR400 phi 8 steel bar mesh, and the mesh hole distance is 2cm × 2 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010146922.9A CN111321705B (en) | 2020-03-05 | 2020-03-05 | Construction method of debris flow blocking dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010146922.9A CN111321705B (en) | 2020-03-05 | 2020-03-05 | Construction method of debris flow blocking dam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111321705A true CN111321705A (en) | 2020-06-23 |
| CN111321705B CN111321705B (en) | 2022-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116856346A (en) * | 2023-08-31 | 2023-10-10 | 四川省西南大地集团有限公司 | Blocking structure for debris flow disaster management |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103243684A (en) * | 2013-05-20 | 2013-08-14 | 黄河勘测规划设计有限公司 | Water permeable masonry tailing dam structure |
| CN205205781U (en) * | 2015-07-21 | 2016-05-04 | 中国科学院水利部成都山地灾害与环境研究所 | Junked tire mud -rock flow engineering body protector |
| CN206956686U (en) * | 2017-07-28 | 2018-02-02 | 厦门市市政工程设计院有限公司 | A kind of hydraulic reclamation area gabion discharge opening |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243684A (en) * | 2013-05-20 | 2013-08-14 | 黄河勘测规划设计有限公司 | Water permeable masonry tailing dam structure |
| CN205205781U (en) * | 2015-07-21 | 2016-05-04 | 中国科学院水利部成都山地灾害与环境研究所 | Junked tire mud -rock flow engineering body protector |
| CN206956686U (en) * | 2017-07-28 | 2018-02-02 | 厦门市市政工程设计院有限公司 | A kind of hydraulic reclamation area gabion discharge opening |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116856346A (en) * | 2023-08-31 | 2023-10-10 | 四川省西南大地集团有限公司 | Blocking structure for debris flow disaster management |
| CN116856346B (en) * | 2023-08-31 | 2023-11-14 | 四川省西南大地集团有限公司 | Blocking structure for debris flow disaster management |
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| CN111321705B (en) | 2022-01-04 |
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