CN105804094B - A kind of dangerous determination methods of rock landslip and its application - Google Patents

A kind of dangerous determination methods of rock landslip and its application Download PDF

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Publication number
CN105804094B
CN105804094B CN201610137651.4A CN201610137651A CN105804094B CN 105804094 B CN105804094 B CN 105804094B CN 201610137651 A CN201610137651 A CN 201610137651A CN 105804094 B CN105804094 B CN 105804094B
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slip mass
dangerous
gradient
rock landslip
landslip
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CN105804094A (en
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余斌
胡伟
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Chengdu Univeristy of Technology
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines

Abstract

The invention discloses a kind of dangerous determination methods of rock landslip and its application, belongs to landslide control engineering technical field, it is characterised in that comprise the following steps:A, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, come down bulk area A, slip mass upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, slip mass left surface hypsography gradient θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2;B, upper steep terrain factor U, both sides multi-stress C are calculated;C, terrain generalization Assessing parameters T is calculated again;D, the Hazard rank of rock landslip is divided.The influence of topography factor of the invention for considering rock landslip comprehensively, accurately divides rock landslip fatalness region in a manner of quantitative, greatly improves the dangerous accuracy judged of rock landslip, has good landslide early warning effect.

Description

A kind of dangerous determination methods of rock landslip and its application
Technical field
The present invention relates to the dangerous determination methods of landslide control engineering technical field, more particularly to a kind of rock landslip And its application.
Background technology
Red beds is clastic deposited sediments stratum of the outward appearance using red as dominant hue, is distributed widely in the southwest, northwest, China in China In and South China, wherein it is the Sichuan Basin to be distributed most wide, area is up to more than 260,000 square kilometres.Based on Red Bed is landslide easily hair Area, often occurs numerous landslide disasters in rainy season, and the natural calamity that rock landslip, which is even more one of which, can not be ignored.Rock Matter landslide is a kind of generation in mountain area or the natural phenomena of slope of highway.Rock landslip occur after, produce slip rock mass and its The upper face soil body moves under hillside or roadside, becomes silted up and buries and impact Architectural Equipment, the highways such as neighbouring residenter house, factory Deng causing greatly to destroy.
Rock landslip generally requires possess three conditions:One is advantageous for occurring the orographic condition of rock landslip; Second, there is weak structural face in rock stratum, such as the siltized intercalation in sand-mud interbed;Third, abundant rainfall, rainwater are entered by crack The generation of weak structural face and final induced landslide.These condition combined influences simultaneously determine the stability of slopes.Wherein, landform bar Part includes to the influence factor of rock landslip:Ramp slope, slip mass upside steep slope topography and the slip mass folder of potential slip mass Canyon topography among left and right.At present, research of the domestic and foreign scholars to the orographic condition for formation of coming down focuses primarily upon domatic The research of the gradient, it is the simple data statistics to its distribution rule, does not further investigate its inherent mechanism.
Publication No. CN 104299367A, publication date are that the Chinese patent literature of on 01 21st, 2015 discloses one kind Landslide disaster multistage comprehensive monitoring method for early warning, it is characterised in that it comprises the following steps:(1) number is monitored by historical record According to Landslide Deformation damage model test, calculate landslide monitoring early warning threshold limit value;Determine to grind according to each index critical exponent Study carefully the possibility whether area has landslide to occur;(2) if monitoring numerical value is more than critical value;According to each landslide occurrence index, it is determined that Come down the possibility size that the place that may occur and landslide occur, and delimit early-warning and predicting grade;(3) level Four early warning and pre- is determined Alert boundary region;(4) early warning result is issued, in combination with the precautionary areas mass presdiction and disaster prevention network system, directly notice monitors person liable, Carry out and take precautions against natural calamities, keep away calamity preparation.
Landslide disaster multistage comprehensive monitoring method for early warning disclosed in the patent document is, it is necessary to which a large amount of history for generation of coming down are recorded Monitoring Data is recorded, then by Landslide Deformation damage model test, calculates landslide monitoring early warning threshold limit value;Further according to each index Critical exponent determines the possibility whether research area has landslide to occur, although the landslide factor of analysis is more, to influenceing landslide Another key factor terrain factor analysis is very few, more without quantitative terrain factor computational methods, causes whole landslide early warning Accuracy, it is not particularly suitable for the dangerous judgement of Based on Red Bed rock landslip.
The content of the invention
The present invention in order to overcome above-mentioned prior art the defects of, there is provided a kind of dangerous determination methods of rock landslip and its Using comprehensively the present invention considers the influence of topography factor of rock landslip, and rock landslip danger is accurately divided in a manner of quantitative Property region, greatly improve the dangerous accuracy judged of rock landslip, there is good landslide early warning effect.
The present invention is achieved through the following technical solutions:
The dangerous determination methods of a kind of rock landslip, it is characterised in that comprise the following steps:
A, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, come down bulk area A, sliding Slopes upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, the slip mass left surface hypsography gradient θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2
B, upper steep terrain factor U is calculated by formula 1, both sides multi-stress C is calculated by formula 2;
C, terrain generalization Assessing parameters T is calculated by formula 3;
T=tan (α)+1.5U+0.5C (formula 3)
D, the terrain generalization Assessing parameters T obtained by step c divides to the Hazard rank of rock landslip:Landform Comprehensive distinguishing factor T values can effectively differentiate domatic danger, and T values are bigger, dangerous higher;On the contrary, T values are smaller, it is dangerous It is lower;It is dangerous high as T > 0.85;It is dangerous medium as 0.6 < T≤0.85;It is dangerous as 0.35 < T≤0.6 It is low;It is dangerous very low as T≤0.35.
In the step b, work as θ1When≤0, A is takenL=0;Work as θ2When≤0, A is takenR=0;As α >=β, U=0 is taken;
The present invention, judge suitable for the danger of Based on Red Bed rock landslip.
Further, it is of the invention, sentence suitable for the danger of the Based on Red Bed rock landslip of 15 °≤α≤40 ° of the slip mass gradient It is disconnected.
Further, it is of the invention, suitable for the danger of the Based on Red Bed rock landslip of 0 °≤β≤85 ° of the slip mass upper side gradient Dangerous judgement.
The principle of the present invention is as follows:
Upper steep lower slow landform is advantageous to rainwater and enters potential slip mass by slip mass top crack, and then causes rock stratum The gradual saturation of Weak face simultaneously softens, and shearing strength is gradually reduced, and Weak face failure by shear locally occurs and produces shear crack, rain Water, which constantly enters these cracks, makes its full water, and pore water pressure increases to form excess pore water pressure, and shear crack gradually extends company Logical to form shear surface, weak surface intensity further reduces, and ultimately results in the local soil body because shear surface shearing strength is less than shear stress And glided along slip band;The presence of intermediate recess landform makes whole potential slip mass be in concave slope landform, and slip mass surface is more sharp In collecting more rainwater, beneficial to slip mass unstability.Free face is usually that slip mass cuts outlet port, and rain penetration enters the soil body Along slope after lower formation shear surface, it is more easy to penetrate at free face to ooze out, and then cause slopes to glide.Therefore the gradient, upside are steep Slope, intermediate recess landform, free face landform etc. can all play a role in landslide, but slip mass gradient α influence is maximum. Slip mass gradient α, upper steep terrain factor U and both sides multi-stress C are fully incorporated in together by formula 3, synthetically consider ground The effect of shape factor, embody each factor of influence correlation and importance.
Beneficial effects of the present invention are mainly manifested in following aspect:
First, it is of the invention, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, slip mass Area A, slip mass upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, slip mass left surface landform Unduation grade θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2;Calculate again steep terrain factor U, Both sides multi-stress C and terrain generalization Assessing parameters T, the danger finally by terrain generalization Assessing parameters T to rock landslip Grade is divided:Terrain generalization Assessing parameters T values can effectively differentiate domatic danger, and T values are bigger, dangerous higher;Phase Instead, T values are smaller, dangerous lower;It is dangerous high as T > 0.85;It is dangerous medium as 0.6 < T≤0.85;When 0.35 It is dangerous low during < T≤0.6;It is dangerous very low as T≤0.35;Compared with prior art, by the gradient, upper steep orographic condition It is fully incorporated in together with both sides orographic condition, the effect of orographic factor is synthetically considered, by studying orographic factor pair The occurrence degree that comes down carries out internal mechanism research, establishes the easy hair computation model of Based on Red Bed rock landslip;With quantitative side Formula accurately divides rock landslip fatalness region, greatly improves the dangerous accuracy judged of rock landslip, has good Landslide early warning effect.
2nd, of the invention, T, tan (α), U, C are dimensionless group in formula 3, in Based on Red Bed, various rock landslip conditions Under can use, there is stronger applicability.
3rd, it is of the invention, judge suitable for the danger of Based on Red Bed rock landslip, Based on Red Bed is landslide prone district, Often occur numerous landslide disasters in rainy season, and the natural calamity that Based on Red Bed rock landslip, which is even more one of which, can not be ignored Evil, by rock landslip danger determination methods of the present invention, can effectively reduce landslide disaster.
4th, it is of the invention, judge suitable for the dangerous of Based on Red Bed rock landslip of 15 °≤α≤40 ° of the slip mass gradient, By measuring slip mass gradient α, and the terrain generalization Assessing parameters T being calculated by formula 3, domatic danger can be effectively differentiated Property, when 15 °≤α≤40 ° of the slip mass gradient, be easy to it is stable and accurate mark off rock landslip fatalness region, improve landslide Early warning effect.
5th, it is of the invention, suitable for the danger of the Based on Red Bed rock landslip of 0 °≤β≤85 ° of the slip mass upper side gradient Judge, by measuring slip mass gradient α, and slip mass upper side gradient β, and by the upper steep landform that formula 1 is calculated because Sub- U, due to the effect of rainfall infiltration, water source being provided for landslide, upper steep terrain factor U is the secondary inducement that landslide is formed, when During 0 °≤β≤85 °, terrain generalization Assessing parameters T that convolution 3 is calculated can effectively differentiate domatic danger, further Improve landslide early warning effect.
Brief description of the drawings
The present invention is described in further detail below in conjunction with specification drawings and specific embodiments, wherein:
Fig. 1 is orographic factor schematic diagram of the present invention;
Fig. 2 is Fig. 1 A-A diagrammatic cross-sections;
Fig. 3 is Fig. 1 B-B diagrammatic cross-sections;
Fig. 4 is the dangerous division figure of the honest town Feng Yi townshiies small watershed rock landslip in Sichuan Province Bazhong City Nanjiang County;
Wherein:Au, slip mass upper side area, A, landslide bulk area, AL, slip mass left surface area, AR, slip mass it is right Lateralarea, F, free face, α, the slip mass gradient, β, the slip mass upper side gradient, θ1, slip mass left surface hypsography slope Degree, θ2, the slip mass right flank hypsography gradient.
Embodiment
Embodiment 1
Referring to Fig. 1-Fig. 3, a kind of dangerous determination methods of rock landslip, comprise the following steps:
A, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, come down bulk area A, sliding Slopes upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, the slip mass left surface hypsography gradient θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2
B, upper steep terrain factor U is calculated by formula 1, both sides multi-stress C is calculated by formula 2;
C, terrain generalization Assessing parameters T is calculated by formula 3;
T=tan (α)+1.5U+0.5C (formula 3)
D, the terrain generalization Assessing parameters T obtained by step c divides to the Hazard rank of rock landslip:Landform Comprehensive distinguishing factor T values can effectively differentiate domatic danger, and T values are bigger, dangerous higher;On the contrary, T values are smaller, it is dangerous It is lower;It is dangerous high as T > 0.85;It is dangerous medium as 0.6 < T≤0.85;It is dangerous as 0.35 < T≤0.6 It is low;It is dangerous very low as T≤0.35.
The present embodiment is most basic embodiment, and the basic terrain data for determining slip mass is surveyed and drawn by field investigation: Slip mass gradient α, come down bulk area A, slip mass upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, slip mass left surface hypsography gradient θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2;Again Steep terrain factor U, both sides multi-stress C and terrain generalization Assessing parameters T in calculating, finally by terrain generalization Assessing parameters T The Hazard rank of rock landslip is divided:Terrain generalization Assessing parameters T values can effectively differentiate domatic danger, and T values are got over Greatly, it is dangerous higher;On the contrary, T values are smaller, it is dangerous lower;It is dangerous high as T > 0.85;As 0.6 < T≤0.85, It is dangerous medium;It is dangerous low as 0.35 < T≤0.6;It is dangerous very low as T≤0.35;Compared with prior art, will The gradient, upper steep orographic condition and both sides orographic condition are fully incorporated in together, are synthetically considered the effect of orographic factor, are led to Cross research orographic factor and internal mechanism research is carried out to landslide occurrence degree, the easy hair for establishing Based on Red Bed rock landslip calculates Model;Rock landslip fatalness region is accurately divided in a manner of quantitative, greatly improves the dangerous judgement of rock landslip Accuracy, there is good landslide early warning effect.
Embodiment 2
Referring to Fig. 1-Fig. 3, a kind of dangerous determination methods of rock landslip, comprise the following steps:
A, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, come down bulk area A, sliding Slopes upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, the slip mass left surface hypsography gradient θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2
B, upper steep terrain factor U is calculated by formula 1, both sides multi-stress C is calculated by formula 2;
C, terrain generalization Assessing parameters T is calculated by formula 3;
T=tan (α)+1.5U+0.5C (formula 3)
D, the terrain generalization Assessing parameters T obtained by step c divides to the Hazard rank of rock landslip:Landform Comprehensive distinguishing factor T values can effectively differentiate domatic danger, and T values are bigger, dangerous higher;On the contrary, T values are smaller, it is dangerous It is lower;It is dangerous high as T > 0.85;It is dangerous medium as 0.6 < T≤0.85;It is dangerous as 0.35 < T≤0.6 It is low;It is dangerous very low as T≤0.35.
In the step b, work as θ1When≤0, A is takenL=0;Work as θ2When≤0, A is takenR=0;As α >=β, U=0 is taken;
The present embodiment is a better embodiment, and T, tan (α), U, C are dimensionless group in formula 3, in Based on Red Bed, It can be used under the conditions of various rock landslips, there is stronger applicability.
Embodiment 3
Referring to Fig. 1-Fig. 3, a kind of dangerous determination methods of rock landslip, comprise the following steps:
A, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, come down bulk area A, sliding Slopes upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, the slip mass left surface hypsography gradient θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2
B, upper steep terrain factor U is calculated by formula 1, both sides multi-stress C is calculated by formula 2;
C, terrain generalization Assessing parameters T is calculated by formula 3;
T=tan (α)+1.5U+0.5C (formula 3)
D, the terrain generalization Assessing parameters T obtained by step c divides to the Hazard rank of rock landslip:Landform Comprehensive distinguishing factor T values can effectively differentiate domatic danger, and T values are bigger, dangerous higher;On the contrary, T values are smaller, it is dangerous It is lower;It is dangerous high as T > 0.85;It is dangerous medium as 0.6 < T≤0.85;It is dangerous as 0.35 < T≤0.6 It is low;It is dangerous very low as T≤0.35.
In the step b, work as θ1When≤0, A is takenL=0;Work as θ2When≤0, A is takenR=0;As α >=β, U=0 is taken;
The present invention, judge suitable for the danger of Based on Red Bed rock landslip.
The present embodiment is another better embodiment, is judged suitable for the danger of Based on Red Bed rock landslip, red beds Area is landslide prone district, and numerous landslide disasters often occurs in rainy season, and Based on Red Bed rock landslip is even more one of which The natural calamity that can not be ignored, by rock landslip danger determination methods of the present invention, landslide disaster can be effectively reduced.
Embodiment 4
Referring to Fig. 1-Fig. 3, a kind of dangerous determination methods of rock landslip, comprise the following steps:
A, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, come down bulk area A, sliding Slopes upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, the slip mass left surface hypsography gradient θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2
B, upper steep terrain factor U is calculated by formula 1, both sides multi-stress C is calculated by formula 2;
C, terrain generalization Assessing parameters T is calculated by formula 3;
T=tan (α)+1.5U+0.5C (formula 3)
D, the terrain generalization Assessing parameters T obtained by step c divides to the Hazard rank of rock landslip:Landform Comprehensive distinguishing factor T values can effectively differentiate domatic danger, and T values are bigger, dangerous higher;On the contrary, T values are smaller, it is dangerous It is lower;It is dangerous high as T > 0.85;It is dangerous medium as 0.6 < T≤0.85;It is dangerous as 0.35 < T≤0.6 It is low;It is dangerous very low as T≤0.35.
In the step b, work as θ1When≤0, A is takenL=0;Work as θ2When≤0, A is takenR=0;As α >=β, U=0 is taken;
Further, it is of the invention, sentence suitable for the danger of the Based on Red Bed rock landslip of 15 °≤α≤40 ° of the slip mass gradient It is disconnected.
The present embodiment is another better embodiment, by measuring slip mass gradient α, and the ground being calculated by formula 3 Shape comprehensive distinguishing factor T, can effectively differentiate domatic danger, and when 15 °≤α≤40 ° of the slip mass gradient, it is stable accurate to be easy to Mark off rock landslip fatalness region, improve landslide early warning effect.
Embodiment 5
Referring to Fig. 1-Fig. 3, a kind of dangerous determination methods of rock landslip, comprise the following steps:
A, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, come down bulk area A, sliding Slopes upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, the slip mass left surface hypsography gradient θ1, slip mass right flank area AR, slip mass right flank hypsography gradient θ2
B, upper steep terrain factor U is calculated by formula 1, both sides multi-stress C is calculated by formula 2;
C, terrain generalization Assessing parameters T is calculated by formula 3;
T=tan (α)+1.5U+0.5C (formula 3)
D, the terrain generalization Assessing parameters T obtained by step c divides to the Hazard rank of rock landslip:Landform Comprehensive distinguishing factor T values can effectively differentiate domatic danger, and T values are bigger, dangerous higher;On the contrary, T values are smaller, it is dangerous It is lower;It is dangerous high as T > 0.85;It is dangerous medium as 0.6 < T≤0.85;It is dangerous as 0.35 < T≤0.6 It is low;It is dangerous very low as T≤0.35.
In the step b, work as θ1When≤0, A is takenL=0;Work as θ2When≤0, A is takenR=0;As α >=β, U=0 is taken;
Further, it is of the invention, suitable for the danger of the Based on Red Bed rock landslip of 0 °≤β≤85 ° of the slip mass upper side gradient Dangerous judgement.
The present embodiment is preferred forms, by measuring slip mass gradient α, and slip mass upper side gradient β, and is led to The upper steep terrain factor U that formula 1 is calculated is crossed, because rainfall infiltration acts on, provides water source for landslide, upper steep terrain factor U is Come down the secondary inducement formed, and when 0 °≤β≤85 °, terrain generalization Assessing parameters T that convolution 3 is calculated can be effectively Differentiate domatic danger, further improve landslide early warning effect.
Rock matter of the present invention is verified below by way of the honest town Feng Yi townshiies small watershed rock landslip in Sichuan Province Bazhong City Nanjiang County The dangerous determination methods on landslide:
Referring to Fig. 4, the basin is made up of the interaction such as verrucano, glutenite and mud stone, belongs to typical beded rock mass, rock stratum Occurrence is mostly gentle.This area's average annual rainfall reaches 1058mm, may be come down when there is larger rainfall.
Using the present invention dangerous progress computation partition domatic to the basin hillside.
The domatic unit for participating in calculating includes choosing at the larger region 10 of terrain factor.Orographic factor referring to Fig. 1-Fig. 3, Measure the slip mass gradient α of each zonule respectively first, then measure the landslide bulk area A of each zonule, each zonule Slip mass upper side gradient β and slip mass upper side area Au, each zonule slip mass left surface area AL, slip mass Right flank area ARWith corresponding slip mass left surface hypsography gradient θ1, slip mass right flank hypsography gradient θ2, by formula 1 calculates U, calculates C by formula 2, finally calculates terrain factor T by formula 3.The domatic orographic factor measured value in hillside and T at 10 Value calculated case, grade of risk and the situation that actually occurs on landslide measure referring to table 1, table 1 for the domatic orographic factor in hillside Value, T values calculate and dangerous division table.
Table 1
According to the dangerous criteria for classifying:It is dangerous high as T > 0.85;It is dangerous medium as 0.6 < T≤0.85; It is dangerous low as 0.35 < T≤0.6;It is dangerous very low when T≤0.35.T values result of calculation is shown in table 1:It is potential at 10 It is dangerous very low at dangerous low region 5 at dangerous medium region 3 at dangerous high region 1 in slip mass At region 1.
Contrast actually occurs situation, high domatic (referring to table 1 of all 1 danger:Numbering 7 it is domatic) there occurs cunning Slope;Medium domatic of 3 danger, 3 all there occurs landslide (referring to table 1:Numbering 8,9 and 10 it is domatic);5 danger are low It is domatic, 2 there occurs landslide (referring to table 1:Numbering 5 and 6 it is domatic), 3 without occur landslide (referring to table 1:Numbering 1,3 With 4 it is domatic) and very low domatic (referring to table 1 of 1 danger:Numbering 2 it is domatic) without coming down.In summary, should The dangerous accuracy judged of rock landslip is greatly improved with the method for the invention.

Claims (5)

1. the dangerous determination methods of a kind of rock landslip, it is characterised in that comprise the following steps:
A, the basic terrain data for determining slip mass is surveyed and drawn by field investigation:Slip mass gradient α, come down bulk area A, slip mass Upper side area Au, slip mass upper side gradient β, slip mass left surface area AL, slip mass left surface hypsography gradient θ1, Slip mass right flank area AR, slip mass right flank hypsography gradient θ2
B, upper steep terrain factor U is calculated by formula 1, both sides multi-stress C is calculated by formula 2;
C, terrain generalization Assessing parameters T is calculated by formula 3;
T=tan (α)+1.5U+0.5C (formula 3)
D, the terrain generalization Assessing parameters T obtained by step c divides to the Hazard rank of rock landslip:As T > It is dangerous high when 0.85;It is dangerous medium as 0.6 < T≤0.85;It is dangerous low as 0.35 < T≤0.6;When T≤ It is dangerous very low when 0.35.
A kind of 2. dangerous determination methods of rock landslip according to claim 1, it is characterised in that:In the step b, Work as θ1When≤0, A is takenL=0;Work as θ2When≤0, A is takenR=0;As α >=β, U=0 is taken.
A kind of 3. application of the dangerous determination methods of rock landslip according to claim 1, it is characterised in that:It is applied to The dangerous judgement of Based on Red Bed rock landslip.
A kind of 4. application of the dangerous determination methods of rock landslip according to claim 3, it is characterised in that:It is applied to The dangerous judgement of the Based on Red Bed rock landslip of 15 °≤α≤40 ° of the slip mass gradient.
A kind of 5. application of the dangerous determination methods of rock landslip according to claim 3, it is characterised in that:It is applied to The dangerous judgement of the Based on Red Bed rock landslip of 0 °≤β≤85 ° of the slip mass upper side gradient.
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