CN108104067A - A kind of novel flexible mud-rock flow suitable for mountain area is blocked device and its construction method - Google Patents
A kind of novel flexible mud-rock flow suitable for mountain area is blocked device and its construction method Download PDFInfo
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- CN108104067A CN108104067A CN201711425250.XA CN201711425250A CN108104067A CN 108104067 A CN108104067 A CN 108104067A CN 201711425250 A CN201711425250 A CN 201711425250A CN 108104067 A CN108104067 A CN 108104067A
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- mud
- retaining wall
- gravity retaining
- flexible
- flexible structure
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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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
- E01F7/04—Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
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- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
It blocks device and its construction method the invention discloses a kind of novel flexible mud-rock flow suitable for mountain area, several flexible structures of upper tightly lower sparse layered arrangement between two Gravity Retaining Walls of the device；Flexible structure is made of spring, cylindric engineering plastics shell, sealing cement and anchoring end；Entire flexible structure is fixedly connected by split bolt of the anchoring end at both ends with pre-plugged in the Gravity Retaining Wall of both sides；The present invention optimizes flexible structure arrangement according to the separating mechanism of mud-rock flow so that device of blocking has performance of preferably blocking.Gravity Retaining Wall sets wall heel slab in bottom inside, and the stability by device during mud-rock-flow-impact is maintained using passive earth pressure.Apparatus of the present invention design is simple, easy for construction, economic and practical, when by mud-rock-flow-impact, it is possible to reduce the dynamic response that mud-rock-flow-impact is brought, can dissipate substantial amounts of impact energy, with prominent block effect and the stability of itself, there is prominent effect of taking precautions against natural calamities to mountain area mud-rock flow.
Description
Technical field
It takes precautions against natural calamities field the present invention relates to mud-rock flow, blocks more particularly to a kind of novel flexible mud-rock flow suitable for mountain area
Device and its construction method.
Background technology
The extreme weather events such as EI Nino change atmospheric circulation, cause the diastrous weathers such as heavy rain, flood；Global warming
Increase with extreme hot event, cause deglaciation, frozen soil layer freeze thawing aggravation.Under the influence of these extreme climates and environment,
Mountain area mud-stone flow disaster takes place frequently, and the Problems of Disaster Preparedness And Reduction of mud-rock flow increasingly comes into the picture.Mud-rock flow have it is sudden with
And the features such as flow velocity is fast, and flow is big, and matter content is greatly and destructive power is strong, generation mud-rock flow can usually destroy by rush of water the traffic such as road and rail
Facility even villages and small towns etc., bring about great losses.Nowadays common mud-rock flow block device there is protecting against shock effect it is limited, apply
During expenses of labour, consumptive material is more, high cost problems.
The content of the invention
It is an object of the invention to be directed to existing mud-rock flow to block the deficiency of device, provide that a kind of protecting against shock effect is good, consumption
Material is few, construction is simple, durability is good and the economic novel flexible mud-rock flow suitable for mountain area is blocked device and its construction method.
The applicable scene of the present invention is：Mountain area and the nearby mud-rock flow of the important buildings such as no residential block take place frequently place.
Because there is no residential block in mountain area, according to this feature, novel flexible mud-rock flow of the present invention is set to block device.The device is blocking
When keeping off mud-rock flow, the little particle in mud-rock flow is allowed to break through device a distance of blocking, such design can reduce whole
The dynamic response of a device, and substantial amounts of material can be saved.
Scene after the mud-stone flow disaster of mountain area is investigated and finds mud-rock flow after a distance is moved, mud-rock flow dragon
There is apparent sorting effect at head, as shown in Figure 1.It is this sorting effect be for the stress for device of blocking it is very unfavorable,
Because after sorting effect, mud-rock flow makes a concerted effort to move up to device impact force of blocking, this will be to the root for device of blocking
The moment of flexure of bigger is generated, so that device of blocking destroys.
It is blocked device compared to traditional rigid gravity type using flexible device of blocking, dynamic response is lower, internal force
Smaller.From the point of view of the result of calculation of numerical simulation, the counter-force of bearing can substantially be reduced to rigid gravity type and block the 1/ of device
3-1/5。
Meanwhile device is entirely blocked in order to prevent when being subject to mud-rock-flow-impact, due to the gear of both ends fixing flexible device
Wall loss of stability and cause whole device unstable failure, in the Gravity Retaining Wall for device both ends fixing flexible structure of blocking
Inside sets wall heel slab, and the stability of device is maintained using the passive earth pressure of the soil body.Because passive earth pressure is actively native
10 times or so of pressure, so the Gravity Retaining Wall through this design can ensure enough when being subject to mud-rock-flow-impact load action
Stability.
The present invention combines above-mentioned 3 actual conditions, and innovative proposes a kind of novel flexible mudstone suitable for mountain area
Stream is blocked device, which includes the opposite Gravity Retaining Wall in two positions, and upper tightly lower sparse is layered between two Gravity Retaining Walls
Arrange several flexible structures；The flexible structure is by spring, cylindric engineering plastics shell, sealing cement and anchoring end group
Into；The spring is located in cylindric engineering plastics shell, and sealing cement is filled between spring and cylindric engineering plastics shell；
The anchoring end is fixedly connected with spring in cylindric engineering plastics enclosure；The anchoring that entire flexible structure passes through both ends
Split bolt of the end with pre-plugged in the Gravity Retaining Wall of both sides is fixedly connected.
Further, the density degree of the flexible structure arrangement regards engineering importance and the impulsive force of mud flow of estimation is big
Depending on small；The interfloor distance of layering is not less than 15mm；Spacing between arbitrary flexible structure flexible structure adjacent thereto is not less than
15mm。
Further, the rigidity of the spring is not less than 100N/mm, no more than 400N/mm.
Further, the split bolt is by Screw arbor with nut at both-ends of the diameter not less than 16mm and stopping positioned at Screw arbor with nut at both-ends both ends
Water ring forms.
Further, the Gravity Retaining Wall sets wall heel slab in bottom inside, and the length of wall heel slab is not less than 2m；When blocking
When the span of blocking means is smaller, the wall heel slab of both sides Gravity Retaining Wall can be connected as an entirety.
The present invention proposes that a kind of novel flexible mud-rock flow suitable for mountain area is blocked the construction method of device simultaneously, including with
Lower step：
(1) surveying and locating and earth excavation；
(2) foundation bearing detects, if being unsatisfactory for design bearing capacity, carries out basement process；
(3) both ends Gravity Retaining Wall installation concrete blinding, and in the position for needing to install flexible structure by concrete mould
Plate punches a hole, and split bolt, the Screw arbor with nut at both-ends both ends exposure concrete blinding of split bolt are embedded at corresponding hole
Length not less than 20cm, while split bolt is embedded to, bind the reinforcing bar of Gravity Retaining Wall；
(4) concrete of both ends Gravity Retaining Wall is poured；
(5) after treating the concrete of both ends Gravity Retaining Wall with more than 50% design strength, dismantling concrete template；
(6) flexible structure is welded：Divide side, flexible structure is welded in units of layer from the bottom up, first by bottom flood
The anchoring end of flexible structure welded with the Screw arbor with nut at both-ends of the split bolt of exposure on the inside of one side Gravity Retaining Wall, then tensioning
Flexible structure welds the anchoring end of opposite side and the Screw arbor with nut at both-ends of the split bolt of exposure on the inside of opposite side Gravity Retaining Wall
It connects；Until the welding of all flexible structures finishes；
(7) Screw arbor with nut at both-ends of exposure outside the Gravity Retaining Wall of both ends is blocked, and in the exposure of Gravity Retaining Wall both sides to drawing spiral shell
Cement sand bed is smeared as waterproof layer in the place of bar.
Further, in the step (6) during welding flexible structure, the length of flexible structure is in the Gravity Retaining Wall of both ends
The 19/20 of lateral extent, will not by large span flexible structure of the tensioning flexible structure between the Gravity Retaining Wall of both ends
It is excessively sagging.
The beneficial effects of the invention are as follows：Flexible structure in apparatus of the present invention has significant energy consumption effect, when dress of blocking
It puts when be subject to mud-rock-flow-impact, flexible structure deforms, dissipation impact energy, and the power for reducing device of entirely blocking is rung
It should.In actual mud-rock flow flow process, because mudstone classification effect so that bulky grain concentrates on the upper of mud-rock flow tap
Portion.According to this phenomenon, the flexible structure of upper end is arranged to closeer, relatively dredging for the flexible structure arrangement of lower end, it is so favourable
Stress performance when improving device of entirely blocking and being subject to mud-rock-flow-impact.When device of entirely blocking is subject to mud-rock-flow-impact
When, the Gravity Retaining Wall at both ends maintains the stability of entire device of blocking using the passive earth pressure under wall heel slab, so that it is guaranteed that
Device of blocking has reliable stability, it is ensured that the effect of blocking for device of blocking is not fully exerted.Novel soft through this design
Property mud-rock flow is blocked device, and when mud-rock-flow-impact is subject to, device is more uniformly stressed, and dissipate more impact energys, and two
The Gravity Retaining Wall at end, with enough stability, can ensure that the effect of blocking for device of blocking when mud-rock-flow-impact is subject to act on
Fruit.Also, since the flexible mud-rock flow for being provided in mountain area is blocked device, scarcity does not have important building and structure nearby
Object is built, other barricades can not be built between the Gravity Retaining Wall of both ends, device allows mud-rock flow when mud-rock flow is blocked
In little particle break through device a distance of blocking.Design in this way can greatly reduce dosage and the construction of material
Difficulty.
Description of the drawings
Fig. 1 is the sorting effect schematic diagram at mud-rock flow tap after mud-rock flow movement a distance；
Fig. 2 is that mud-rock flow of the invention flexible is blocked the front view of device；
Fig. 3 is that mud-rock flow of the invention flexible is blocked the flexible structure composition schematic diagram of device；
Fig. 4 (a) is Gravity Retaining Wall front view of the present invention；
Fig. 4 (b) is Gravity Retaining Wall side view of the present invention；
Fig. 5 is the flexible structure of the present invention and both ends Gravity Retaining Wall connection diagram；
In figure, flexible structure 1, Gravity Retaining Wall 2, spring 3, cylindric engineering plastics shell 4, sealing cement 5, anchored end
First 6, wall heel slab 7, seal ring 8, Screw arbor with nut at both-ends 9.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in Fig. 2, block device the present embodiment provides a kind of novel flexible mud-rock flow suitable for mountain area, the device bag
Include two opposite Gravity Retaining Walls in position 2, several flexible structures 1 of upper tightly lower sparse layered arrangement between two Gravity Retaining Walls 2；
The Gravity Retaining Wall 2 plays the role of anchoring flexible structure 1, maintains device stability of entirely blocking.1 cloth of flexible structure
The density degree put is depending on engineering importance and the impulsive force of mud flow size of estimation；The interfloor distance of layering is no less than
15mm；For the ease of installation flexible structure, the spacing between arbitrary 1 flexible structure 1 adjacent thereto of flexible structure is no less than
15mm。
As shown in figure 3, the flexible structure 1 is the core of device of entirely blocking, by the spring 3 of high rigidity, cylindric work
Engineering plastics shell 4, sealing cement 5 and anchoring end 6 form；The spring 3 is located in cylindric engineering plastics shell 4, spring 3
Sealing cement 5 is filled between cylindric engineering plastics shell 4；The anchoring end 6 is made of high-strength stainless steel material, anchor
For fixed end first 6 with spring 3 in cylindric 4 interior welds of engineering plastics shell, high-strength stainless steel material can be used in anchoring end 6；
The rigidity of the spring 3 is no less than 100N/mm, should not exceed 400N/mm.
As shown in Fig. 4 (a), Fig. 4 (b), the Gravity Retaining Wall 2 sets wall heel slab 7, the length of wall heel slab 7 in bottom inside
Degree is depending on the length for device of blocking, but the length of wall heel slab 7 is no less than 2m；When the span for device of blocking is smaller, both sides
The wall heel slab 7 of Gravity Retaining Wall 2 can be connected as an entirety.
As shown in figure 5, entire flexible structure 1 by the anchoring end 6 at both ends with pre-plugged in both sides Gravity Retaining Wall 2
In split bolt welding.The material of the split bolt is high-strength stainless steel, and the Screw arbor with nut at both-ends 9 of 16mm is not less than by diameter
It is formed with the seal ring 8 positioned at 9 both ends of Screw arbor with nut at both-ends, when tensioning Screw arbor with nut at both-ends 8, seal ring 9 can prevent concrete
It is oozed out at Screw arbor with nut at both-ends 8.
When device works, since flexible structure 1 has certain flexibility, when mud-rock-flow-impact is born, foot is generated
Enough deformations, the impact energy of dissipation mud-rock flow reduce the dynamic response for structure of blocking, play prominent effect of blocking.And
When device is designed, it is contemplated that sorting effect of the mud-rock flow in flowing, i.e. bulky grain concentrate on the tap of mud-rock flow
Top, optimizes the arrangement of flexible structure, and the innovative arrangement for proposing upper tightly lower sparse can be very good to improve
It blocks the stress performance of device.The layered arrangement of flexible structure 1 simultaneously, but also device of blocking is suitable for mudstone under various operating modes
The demand of taking precautions against natural calamities of stream.When designing the Gravity Retaining Wall of both ends fixing flexible structure 1, it is contemplated that whole device during mud-rock-flow-impact
Stress, innovative proposes sets wall heel slab 7 in the inside for device of blocking, with the passive earth pressure using the soil body come
Maintain stability of the device when being subject to mud-rock-flow-impact of entirely blocking.And due to being come mudstone of blocking using flexible structure
Stream is blocked structure compared to Conventional gravity formula, and the concrete amount for device of entirely blocking greatly reduces, and it is difficult both to have reduced construction
Degree decreases the consumption of material.
It blocks the present embodiment provides a kind of novel flexible mud-rock flow suitable for mountain area the construction method of device, including following
Step：
(1) surveying and locating and earth excavation；
(2) foundation bearing detects, if being unsatisfactory for design bearing capacity, carries out basement process；
(3) both ends Gravity Retaining Wall installation concrete blinding, and in the position for needing to install flexible structure by concrete mould
Plate punches a hole, is embedded to split bolt at corresponding hole, the Screw arbor with nut at both-ends of split bolt is by high-strength stainless steel material
It is made, the length of Screw arbor with nut at both-ends answers long enough so that the length of Screw arbor with nut at both-ends both ends exposure concrete blinding is not less than 20cm, just
In subsequently being welded with flexible structure, while split bolt is embedded to, the reinforcing bar of Gravity Retaining Wall is bound；
(4) concrete of both ends Gravity Retaining Wall (2) is poured；
(5) after treating the concrete of both ends Gravity Retaining Wall with more than 50% design strength, dismantling concrete template；
(6) flexible structure is welded：Divide side, weld flexible structure in units of layer from the bottom up, the length of flexible structure is
The 19/20 of both ends Gravity Retaining Wall inner distance so can be located at both ends Gravity Retaining Wall by tensioning flexible structure
Between large span flexible structure will not be excessively sagging；Specifically, first by the anchored end of the flexible structure of bottom flood
The Screw arbor with nut at both-ends of head and the split bolt of exposure on the inside of the Gravity Retaining Wall of one side welds, then tensioning flexible structure, by opposite side
Anchoring end and opposite side Gravity Retaining Wall on the inside of the Screw arbor with nut at both-ends of split bolt of exposure weld；Until all flexible structures
Welding finishes；From the bottom up in a manner of being welded in units of layer, the stress that can make both ends Gravity Retaining Wall is more reasonable；
When Gravity Retaining Wall has 100% design strength not yet, if Gravity Retaining Wall can be made by carrying out tensioning welding from top to bottom
Bottom generate larger moment of flexure；
(7) Screw arbor with nut at both-ends of exposure outside the Gravity Retaining Wall of both ends is blocked, and in the exposure of Gravity Retaining Wall both sides to drawing spiral shell
The M7.5 cement sand beds of 5mm thickness are spread as waterproof layer in the place of bar.
Claims (7)
- The device 1. a kind of novel flexible mud-rock flow suitable for mountain area is blocked, which is characterized in that the device includes two position phases To Gravity Retaining Wall (2), several flexible structures of upper tightly lower sparse layered arrangement (1) between two Gravity Retaining Walls (2)；It is described soft Property structure (1) by spring (3), cylindric engineering plastics shell (4), sealing cement (5) and anchor end (6) and form；The bullet Spring (3) is located in cylindric engineering plastics shell (4), and Seal Oil is filled between spring (3) and cylindric engineering plastics shell (4) Cream (5)；Anchoring end (6) is fixedly connected with spring (3) inside cylindric engineering plastics shell (4)；Entire flexible knot Structure (1) is fixedly connected by split bolt of the anchoring end (6) at both ends with pre-plugged in both sides Gravity Retaining Wall (2).
- The device 2. a kind of novel flexible mud-rock flow suitable for mountain area according to claim 1 is blocked, which is characterized in that institute The density degree of flexible structure (1) arrangement is stated depending on engineering importance and the impulsive force of mud flow size of estimation；The layer of layering Between distance be not less than 15mm；Spacing between arbitrary flexible structure (1) flexible structure adjacent thereto (1) is not less than 15mm.
- The device 3. a kind of novel flexible mud-rock flow suitable for mountain area according to claim 1 is blocked, which is characterized in that institute The rigidity of spring (3) is stated not less than 100N/mm, no more than 400N/mm.
- The device 4. a kind of novel flexible mud-rock flow suitable for mountain area according to claim 1 is blocked, which is characterized in that institute Split bolt is stated to be made of Screw arbor with nut at both-ends (9) of the diameter not less than 16mm and the seal ring (8) positioned at Screw arbor with nut at both-ends (9) both ends.
- The device 5. a kind of novel flexible mud-rock flow suitable for mountain area according to claim 1 is blocked, which is characterized in that institute It states Gravity Retaining Wall (2) and wall heel slab (7) is set in bottom inside, the length of wall heel slab (7) is not less than 2m；When device of blocking across When degree is smaller, the wall heel slab (7) of both sides Gravity Retaining Wall (2) can be connected as an entirety.
- The construction method of device 6. a kind of novel flexible mud-rock flow suitable for mountain area is blocked, which is characterized in that including following step Suddenly：(1) surveying and locating and earth excavation；(2) foundation bearing detects, if being unsatisfactory for design bearing capacity, carries out basement process；(3) both ends Gravity Retaining Wall installation concrete blinding, and beating concrete blinding in the position for needing to install flexible structure A hole is worn, split bolt, the length of the Screw arbor with nut at both-ends both ends exposure concrete blinding of split bolt are embedded at corresponding hole Degree while split bolt is embedded to, binds the reinforcing bar of Gravity Retaining Wall not less than 20cm；(4) concrete of both ends Gravity Retaining Wall is poured；(5) after treating the concrete of both ends Gravity Retaining Wall with more than 50% design strength, dismantling concrete template；(6) flexible structure is welded：Divide side, flexible structure is welded in units of layer from the bottom up, first by the soft of bottom flood Property the anchoring end of structure welded with the Screw arbor with nut at both-ends of the split bolt of exposure on the inside of one side Gravity Retaining Wall, then tensioning is flexible Structure welds the anchoring end of opposite side and the Screw arbor with nut at both-ends of the split bolt of exposure on the inside of opposite side Gravity Retaining Wall；Directly It is finished to the welding of all flexible structures；(7) Screw arbor with nut at both-ends of exposure outside the Gravity Retaining Wall of both ends is blocked, and in Gravity Retaining Wall both sides exposure Screw arbor with nut at both-ends Cement sand bed is smeared as waterproof layer in place.
- 7. according to the method described in claim 6, it is characterized in that, the step (6) in welding flexible structure when, flexible structure Length be both ends Gravity Retaining Wall inner distance 19/20, both ends Gravity Retaining Wall is located at by tensioning flexible structure Between large span flexible structure will not be excessively sagging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711425250.XA CN108104067B (en) | 2017-12-25 | 2017-12-25 | Flexible debris flow blocking device suitable for mountainous area and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711425250.XA CN108104067B (en) | 2017-12-25 | 2017-12-25 | Flexible debris flow blocking device suitable for mountainous area and construction method thereof |
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| Publication Number | Publication Date |
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| CN108104067A true CN108104067A (en) | 2018-06-01 |
| CN108104067B CN108104067B (en) | 2023-03-24 |
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| CN201711425250.XA Active CN108104067B (en) | 2017-12-25 | 2017-12-25 | Flexible debris flow blocking device suitable for mountainous area and construction method thereof |
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Cited By (1)
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| CN111335272A (en) * | 2020-03-16 | 2020-06-26 | 兰州理工大学 | Ground anchor beam string beam type debris flow grid dam and construction method thereof |
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| CN108104067B (en) | 2023-03-24 |
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