CN109389679A - A kind of spherical Side Slope Safety Coefficient calculation method of slope surface by pulling force effect - Google Patents

A kind of spherical Side Slope Safety Coefficient calculation method of slope surface by pulling force effect Download PDF

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Publication number
CN109389679A
CN109389679A CN201811119250.1A CN201811119250A CN109389679A CN 109389679 A CN109389679 A CN 109389679A CN 201811119250 A CN201811119250 A CN 201811119250A CN 109389679 A CN109389679 A CN 109389679A
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side slope
slope
spherical side
safety coefficient
pulling force
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CN109389679B (en
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沈志平
陈德茂
吴斌
付君宜
王鸿
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Guizhou Zhengye Engineering & Investment Inc Ltd
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Guizhou Zhengye Engineering & Investment Inc Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/05—Geographic models
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/06—Power analysis or power optimisation
    • 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
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/23—Dune restoration or creation; Cliff stabilisation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Computer Graphics (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Abstract

The invention discloses a kind of slope surfaces by the spherical Side Slope Safety Coefficient calculation method of pulling force effect, the spherical side slope sectional view provided first according to exploration report, chooses the most thick section of thickness of earth covering of spherical side slope as least favorable section；Then Three-dimension Numerical Model is established along center line rotation least favorable section, applies the tensile stress load of any direction；The safety coefficient FOS of spherical side slope is finally calculated using Strength Reduction Method, this method is by establishing Three-dimension Numerical Model, the effect of arch is considered that when calculating spherical Side Slope Safety Coefficient compared to conventional limit balancing method, simultaneously it is also contemplated that the effect of slope surface pulling force, the reliability of calculated result greatly improve.

Description

A kind of spherical Side Slope Safety Coefficient calculation method of slope surface by pulling force effect
Technical field
The invention belongs to Side Slope Safety Coefficient calculation method more particularly to a kind of slope surfaces by the spherical side slope of pulling force effect Safety coefficient calculation method.
Background technique
When analyzing natural slope, Slope Shape is suitably generally simplified to infinite slope, and spherical side slope exists Arching, stability are higher than long straight flange slope, if the long straight flange slope according to traditional limit equilibrium method considers, take two dimensional cross-section meter Calculating Side Slope Safety Coefficient will lead to that safety coefficient calculated result is relatively low, and traditional limit equilibrium method is calculating Side Slope Safety Coefficient When be difficult to consider the effect of pulling force.Numerical analysis method has a clear superiority when handling similar complex slope model, three-dimensional numerical value Model can when calculating spherical Side Slope Safety Coefficient not only in view of arch effect, while it is also contemplated that pulling force work With the reliability of calculated result greatly improves.
Summary of the invention
The problem to be solved in the present invention is: providing a kind of spherical Side Slope Safety Coefficient calculating side of slope surface by pulling force effect Method can not consider the effect and slope surface pulling force of arch to solve conventional limit balancing method when calculating spherical Side Slope Safety Coefficient Effect leads to the reliable low problem of calculated result.
A kind of the technical solution adopted by the present invention are as follows: the spherical Side Slope Safety Coefficient calculating side of slope surface by pulling force effect Method, comprising the following steps:
Step 1: the spherical side slope sectional view provided according to exploration report, the thickness of earth covering for choosing spherical side slope are most thick Section is as least favorable section；
Step 2: Three-dimension Numerical Model is established along center line rotation least favorable section, the tension load being subject to according to practical side slope Pulling force is applied to Three-dimension Numerical Model；
Step 3: the safety coefficient FOS of spherical side slope is calculated using Strength Reduction Method.
The sectional view of spherical side slope has to pass through domed center line in step 1.
Section is rotated in step 2 when establishing Three-dimension Numerical Model, need to only rotate left half of side slope section or right half of side The section on slope, rotation angle are 30-90 degree.
The advantages of the present invention over the prior art are that:
This method is by establishing Three-dimension Numerical Model, compared to conventional limit balancing method when calculating spherical Side Slope Safety Coefficient It is considered that the effect of arch, while it is also contemplated that slope surface pulling force effect, the reliability of calculated result greatly improves.
Detailed description of the invention
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is the least favorable sectional view of the specific embodiment of the invention；
Fig. 3 is spherical side slope numerical model of the specific embodiment of the invention slope surface by pulling force effect.
Specific embodiment
A kind of spherical Side Slope Safety Coefficient calculation method of slope surface by pulling force effect, comprising the following steps:
Step 1: the spherical side slope sectional view provided according to exploration report, the thickness of earth covering for choosing spherical side slope are most thick Section is as least favorable section；
The least favorable sectional view of the spherical side slope of the present embodiment is as shown in Fig. 2, side slope stratum includes closely knit block of stone, white clouds matter ash Rock；
Step 2: Three-dimension Numerical Model is established along center line rotation least favorable section, the tension load being subject to according to practical side slope Pulling force is applied to Three-dimension Numerical Model, the practical tension load being subject to of side slope can be any direction；
This example uses finite difference numerical analysis software Flac3DThe numerical model of the left spherical side slope of one side of something in Fig. 2 is established, 45 ° are rotated clockwise along center line and is applied to the concentration tension load of 100kN on ramp portion node, and the present embodiment side slope is real The tension load direction that border is subject to straight up, it is as shown in Figure 3 to obtain three-dimensional numerical model；
Step 3: calculating the safety coefficient FOS of spherical side slope using Strength Reduction Method,
The numerical model in Fig. 3 is calculated, obtains safety coefficient FOS=2.61, stability is good under a stretching force for the spherical side slope It is good.

Claims (3)

1. a kind of slope surface is by the spherical Side Slope Safety Coefficient calculation method of pulling force effect, which comprises the following steps:
Step 1: the spherical side slope sectional view provided according to exploration report, the thickness of earth covering for choosing spherical side slope are most thick Section is as least favorable section；
Step 2: Three-dimension Numerical Model is established along center line rotation least favorable section, the tension load being subject to according to practical side slope Pulling force is applied to Three-dimension Numerical Model；
Step 3: the safety coefficient FOS of spherical side slope is calculated using Strength Reduction Method.
2. a kind of slope surface according to claim 1 is by the spherical Side Slope Safety Coefficient calculation method of pulling force effect, special Sign is that the sectional view of spherical side slope has to pass through domed center line in step 1.
3. a kind of slope surface according to claim 1 is by the spherical Side Slope Safety Coefficient calculation method of pulling force effect, special Sign is, when rotating section in step 2 and establishing Three-dimension Numerical Model, need to only rotate left half of side slope section or right half of side The section on slope, rotation angle are 30-90 degree.
CN201811119250.1A 2018-09-25 2018-09-25 Spherical crown-shaped slope safety coefficient calculation method under action of slope tension Active CN109389679B (en)

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Application Number Priority Date Filing Date Title
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CN109389679B CN109389679B (en) 2022-05-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113221371A (en) * 2021-05-25 2021-08-06 贵州省质安交通工程监控检测中心有限责任公司 Method and device for determining critical sliding surface of side slope and terminal equipment

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Publication number Priority date Publication date Assignee Title
CN113221371A (en) * 2021-05-25 2021-08-06 贵州省质安交通工程监控检测中心有限责任公司 Method and device for determining critical sliding surface of side slope and terminal equipment

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