Safety coefficient calculation method for seabed slope stability

A technology of safety factor and calculation method, applied in the field of safety factor calculation of submarine slope stability, can solve problems such as weak stability, temporary artificial underwater slope stability engineering safety and economic impact, etc., and achieve high calculation accuracy , the calculation is efficient, the principle is clear and clear

Active Publication Date: 2021-01-22
NANJING UNIV OF TECH
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Problems solved by technology

[0003] Due to the stress release caused by the foundation trench and underwater slope formed by manual excavation, the newly formed slope is not compacted under the action of waves, currents, and t

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  • Safety coefficient calculation method for seabed slope stability
  • Safety coefficient calculation method for seabed slope stability
  • Safety coefficient calculation method for seabed slope stability

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Embodiment Construction

[0053] The following is a combination of specific operation methods and details figure 1 and figure 2 The present invention is described in further detail.

[0054] (1) Construct a geometric model for wave-seabed slope coupling calculation: From the basic process of engineering construction, with the excavation of foundation trenches for pre-buried structures, the irregular seabed shape formed by artificial activities is affected by wave loads. Stability is unknown. Estimating the stability of this temporary underwater slope can provide guidance for engineering design and construction, so the present invention describes the corresponding calculation method for the purpose of guiding engineering practice. From the perspective of the geometric characteristics of the temporary submarine slope, the design depth of the slope, the slope ratio of the slope, and the physical and mechanical properties of the sediment all have an impact on the submarine slope; from the stress charact...

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Abstract

The invention discloses a safety factor calculation method for seabed slope stability. The safety factor calculation method comprises the steps of acquiring and calculating wave characteristic parameters and seabed soil mass strength parameters of a sea area; establishing a numerical model based on the wave power characteristics and the soil body strength parameters; analyzing the wave field dynamic model and the seabed slope numerical model based on numerical wave generation and a finite element strength reduction method to obtain a slope stability safety coefficient; and acquiring stabilitychange analysis and estimation under a certain slope rate based on different relative positions of waves and slopes. The stability coefficient of the underwater side slope under the wave load can be estimated, and convenience is provided for selection of the construction slope rate of the underwater temporary side slope. The optimized design slope rate is obtained on the basis of different designparameters and calculation working conditions by utilizing the convenience of numerical simulation calculation. When certain safety requirements are met, the earth excavation and backfill amount of the whole foundation trench is reduced, and damage to the seabed natural ecological environment is reduced to a certain extent.

Description

technical field [0001] The invention relates to the technical field of seabed monitoring, in particular to a safety factor calculation method for seabed slope stability. Background technique [0002] The stability judgment of underwater artificial slopes under wave loads is a basic issue that needs to be considered in the construction of offshore projects, such as underwater pipelines, breakwaters and immersed tunnels. The underwater slope instability problem is a common problem in offshore engineering construction, and the occurrence of landslides is often accompanied by the destruction of the slope structure and surrounding structures. The mentioned offshore engineering structures and pre-buried structures are usually placed in the temporary foundation trench after the excavation of seabed sediments after the prefabrication of the dry dock is completed, and then backfilled. [0003] Due to the stress release caused by the foundation trench and underwater slope formed by m...

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Application Information

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IPC IPC(8): G06F30/13G06F30/23G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/13G06F30/23G06F30/28G06F2111/10G06F2119/14G06F2113/08
Inventor 陈炜昀刘成林徐令宇
Owner NANJING UNIV OF TECH
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