CN211898204U

CN211898204U - Novel debris flow blocking dam body structure

Info

Publication number: CN211898204U
Application number: CN202020258925.7U
Authority: CN
Inventors: 张雷; 胡建东; 魏有林; 申其鸿; 吴鹏; 周生; 代永新; 毛权生; 丁成功; 吴江伟
Original assignee: Sinosteel Maanshan General Institute of Mining Research Co Ltd
Current assignee: Sinosteel Maanshan General Institute of Mining Research Co Ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-11-10
Anticipated expiration: 2030-03-05

Abstract

The utility model discloses a novel debris flow retaining dam body structure, wherein bottom drain openings (2) are arranged at the bottom of a stone masonry retaining dam (1) at intervals, dam body drain holes (4) are arranged at the dam body intervals of the stone masonry retaining dam (1), and top drainage piles are arranged at the upper part of the stone masonry retaining 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 utility model discloses not only increased the flexibility of dam body, and had good water permeability, can permeate discharge debris flow fast and block the water in the dam interception accumulation body, the guarantee blocks the safety and stability of dam to reduce or eliminate debris flow harm.

Description

Novel debris flow blocking dam body structure

Technical Field

The utility model belongs to the technical field of the mud-rock flow prevents and treats, specifically speaking, it relates to a novel mud-rock flow block dam body.

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.

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.

Disclosure of Invention

The utility model aims at providing a novel debris flow blocks dam body structure to the easy quilt that present debris flow rigidity blocked dam exists and strike destruction, and conventional debris flow blocks dam construction cost height, maintain awkward problem, and provide one kind.

For realizing the above purpose of the utility model, the utility model relates to a novel debris flow blocks dam structure adopts following technical scheme to realize:

the utility model relates to a novel debris flow retaining dam body structure, which comprises a stone masonry retaining dam, wherein bottom drainage openings are arranged at the bottom of the stone masonry retaining dam at intervals, and an upstream water inlet of the bottom drainage openings is provided with an anti-clogging reinforcing steel bar net piece; dam body drainage holes are arranged at intervals on the dam body of the stone masonry blocking dam; the top drainage piles are arranged at the upper part 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 dam body structure is avoided when the water level is higher; a rigid mesh sheet and gravel flexible water-permeable body is constructed at the middle upper part in the masonry dam body; a flexible anti-collision protective layer formed by a plurality of closely arranged waste tires is arranged on the upstream face of the stone masonry dam, and the elasticity of the rubber tires is utilized to protect the dam body from being directly impacted and damaged; and the bottom of the masonry blocking dam is provided with concrete poured anti-sliding teeth, and the anti-sliding teeth are poured in anti-sliding tooth open grooves dug at the dam feet of the masonry blocking dam.

The rigid mesh piece gravel-sandwiched flexible water permeable body comprises 3 rigid mesh pieces with different rigidity characteristics, the first layer from the upstream surface is a large-specification rigid mesh piece, the second layer from the upstream surface is a medium-specification rigid mesh piece, the third layer from the upstream surface is a small-specification rigid mesh piece, pebble or rock block filling bodies with the block degree of 15-20 cm are filled between the large-specification rigid mesh piece and the medium-specification rigid mesh piece, and pebble or gravel filling bodies with the grain grade of 5-10 cm are filled between the medium-specification rigid mesh piece and the small-specification rigid mesh piece. The flexible water permeable body of the macadam utilizes the holes filled with the macadam to naturally drain water.

The waste tires are hung on anchoring steel bars arranged on the upstream face of the masonry dam. As a flexible anti-collision measure, tires have their own advantages, which are manifested in: 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.

In order to improve the overall strength of the steel meshes, the middle parts and the upper parts of the large-specification steel meshes, the medium-specification steel meshes and the small-specification steel meshes are fixed by welding channel steel, and each channel steel is directly built in the top of the masonry blocking dam and extends into the dam body of the masonry 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 for ensuring effective flood discharge in rainstorm 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 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 top drainage stack has a stack height of 0.4-0.7 m and a stack width of 0.35-0.6 m. Test and research 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 sizes of 15-20 cm and pebble or broken stone filling bodies with the grain sizes of 5-10 cm respectively filled in the rigid mesh sheet clamped broken stone flexible water permeable bodies.

The utility model relates to a novel mud-rock flow blocks above-mentioned technical scheme of dam body structure in the design, has increased the flexibility of dam body, can effectively reduce the impact energy of mud-rock flow, and can increase the water permeability of dam body, blocks the water in the accumulational mud-rock flow before the smooth discharge dam, and the guarantee blocks the safety and stability of dam to reduce or eliminate mud-rock flow harm.

The utility model relates to a novel mud-rock flow blocks dam body structure has following beneficial effect after adopting above technical scheme:

(1) the utility model discloses a set up abandonment tire protective layer at debris flow retaining dam upper reaches upstream face. 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 utility model discloses an upper portion sets up the flexible water body that passes through of rigid net piece clamp rubble in the dam body, and the net piece of the various rigidity characteristics of three-layer presss from both sides the rubble in the middle of again to do benefit to the rigidity of the whole dam body of adjustment. 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 utility model relates to a novel mud-rock flow blocks above-mentioned integrated configuration of dam body structure and parameter design, for the first dam body structure that blocks the dam of a novel mud-rock flow that proposes at home and abroad, can play the reference effect for the domestic and foreign peer, is applied to similar mountain region mud-rock flow and administers the engineering project, can produce huge social.

Drawings

Fig. 1 is a schematic elevation view of a novel debris flow retaining dam body structure of the present invention;

fig. 2 is a schematic cross-sectional view of a novel debris flow retaining dam body structure of the present invention;

fig. 3 is a schematic view of the rigid mesh sheet clamped gravel flexible water permeable body 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

For further description, the structure of the novel debris flow retaining dam body of the present invention will be described in detail with reference to the accompanying drawings and examples.

The structure elevation schematic diagram of the novel debris flow retaining dam body structure shown in fig. 1 and seen by combining fig. 2 and fig. 3 is that the novel debris flow retaining dam body structure comprises a stone masonry retaining dam 1, bottom water discharge openings 2 are arranged at the bottom of the stone masonry retaining dam 1 at intervals, and an anti-clogging reinforcing mesh is arranged at an upstream water inlet of the bottom water discharge openings 2; dam body water outlet holes 4 are formed in the dam body of the masonry blocking dam 1 at intervals, and the gradient of the dam body water outlet holes 4 is not smaller than 15 degrees; top drainage piles 5 are arranged at intervals on the upper part of the masonry blocking dam 1, pile openings are built evenly and smoothly, and the surfaces of the pile openings are plastered by M10 mortar; 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 blocking dam 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-size rigid mesh 9-phi 20HBR400 steel bar mesh, and the mesh pitch is 15cm multiplied by 15 cm; the second layer from the upstream surface is a middle-specification rigid mesh 10-HBR 400 phi 16 steel bar mesh, and the mesh pitch is 5cm multiplied by 5 cm; the third layer from the upstream is a small-specification rigid mesh 11-HBR 400 phi 8 steel bar mesh, and the mesh pitch is 2cm multiplied by 2 cm. Pebble or block stone filling bodies 12 with the block degree of 15-20 cm are filled between the large-specification rigid net sheets 9 and the medium-specification rigid net sheets 10, pebble or broken stone filling bodies 13 with the grain size of 5-10 cm are filled between the medium-specification rigid net sheets 10 and the small-specification rigid net sheets 11, and filling is required to be naturally filled and compacted in the construction process without vibrating or rolling. The middle parts and the upper parts of the large-specification rigid net sheets 9, the medium-specification rigid net sheets 10 and the small-specification rigid net sheets 11 are fixed through welding channel steel, 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 for a certain anchoring depth, and the rigid net sheets and the channel steel are subjected to anticorrosion treatment in construction; the lower parts of the large-specification rigid mesh 9, the medium-specification rigid mesh 10 and the small-specification rigid mesh 11 are grouted by M30 cement mortar to compact the pores. The bottom water discharge opening 2 is rectangular, and is 0.4m wide and 0.5m high; DN80PVC pipes are adopted by the dam body water outlet 4, the horizontal distance of the water outlet 4 is 1m, and the vertical distance of the water outlet 4 is 1 m; the stack height of the top drainage stack 5 is 0.5m, and the stack width is 0.4 m; the bottom water outlet 2, the dam body water outlet 4, the rigid mesh sheet-sandwiched gravel flexible water permeable body 6 and the top drainage stack 5 jointly form a debris flow blocking dam drainage system from bottom to top; a flexible anti-collision protective layer consisting of a plurality of closely arranged waste tires 3 is arranged on the upstream face of the masonry blocking dam 1, the waste tires 3 are hung on anchoring steel bars arranged on the upstream face of the masonry blocking dam 1, and the elasticity of rubber tires is utilized to protect a dam body from being damaged by direct impact. The concrete poured anti-sliding teeth 7 are arranged at the bottom of the masonry blocking dam 1, the anti-sliding teeth 7 are poured in anti-sliding tooth open grooves dug by dam feet of the masonry blocking dam 1, the groove depth of the anti-sliding tooth open grooves is not less than 0.5m, and the groove width is not less than 0.5 m. A concrete drainage bottom plate 8 is constructed in a natural valley of the downstream of the dam face of the masonry blocking dam 1, and the concrete drainage bottom plate 8 is connected with anti-sliding teeth 7 poured in anti-sliding tooth grooves dug in dam feet of the masonry blocking dam 1 to form an integral structure.

The utility model relates to a novel mud-rock flow blocks dam structure is at mud-rock flow stone masonry and blocks dam 1's dam body construction in-process, through the flexible crashproof protective layer of laying a plurality of closely arranged abandonment tire 3 constitutions and setting up the rigid type net piece on dam body upper portion and press from both sides rubble flexible permeable body 6 in the upstream face of stone masonry blocking dam 1, with the flexibility of adjustment and increase dam body, absorb and weaken the impact force of mud-rock flow, good water permeability has, can permeate fast and discharge mud-rock flow and block the water in the dam interception accumulation body, the guarantee blocks the safety and stability of dam, thereby reduce or eliminate mud-rock flow harm.

The utility model discloses it is applied in the mountain ditch valley district of debris flow that easily takes place in certain large-scale tailing storehouse upper reaches in internal south, and the application result shows that a novel debris flow of establishing blocks dam body structure and has passed through the test of meeting torrential rain 500 years, has effectively prevented the emergence of debris flow calamity, has ensured the operational safety of this large-scale tailing storehouse.

Claims

1. The utility model provides a novel mud-rock flow retaining dam body structure, contains stone masonry retaining dam (1), its characterized in that: bottom drainage openings (2) are formed in the bottom of the masonry blocking dam (1) at intervals, and an anti-clogging steel bar mesh is arranged at an upstream water inlet of each bottom drainage opening (2); dam body drainage holes (4) are arranged at intervals on the dam body of the masonry blocking dam (1); top drainage piles (5) are arranged at intervals on the upper part of the masonry blocking dam (1); 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 flexible anti-collision protective layer consisting of a plurality of closely arranged waste tires (3) is 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).

2. The novel debris flow retaining dam structure as claimed in 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 novel debris flow retaining dam structure as claimed in 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 novel debris flow retaining dam structure as claimed in claim 2 or 3, wherein: the middle parts and the upper parts of the large-specification rigid meshes (9), the medium-specification rigid meshes (10) and the small-specification rigid meshes (11) are fixed by welding channel steel, 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 novel debris flow retaining dam structure as claimed in 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 horizontal spacing of the dam body water outlet holes (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 holes (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.