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Safety monitoring and evaluation method for underwater buried pipelines affected by adjacent construction vibration

A technology for safety monitoring and vibration impact, which is applied in the field of foundation soil survey, infrastructure engineering, construction, etc., and can solve problems such as difficulty in accurately determining pipelines and pipeline damage.

Inactive Publication Date: 2015-09-02
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially in offshore engineering, it is difficult to accurately determine the position of buried pipelines underwater, and the monitoring instruments buried in boreholes that are too close may also cause damage to pipelines

Method used

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  • Safety monitoring and evaluation method for underwater buried pipelines affected by adjacent construction vibration
  • Safety monitoring and evaluation method for underwater buried pipelines affected by adjacent construction vibration
  • Safety monitoring and evaluation method for underwater buried pipelines affected by adjacent construction vibration

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Embodiment Construction

[0043] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0044] A safety monitoring and evaluation method for underwater buried pipelines affected by adjacent construction vibrations, comprising the following steps:

[0045] Step 1: Determine the monitoring route, the number and location of monitoring points;

[0046] Step 2: According to the engineering data, the local refinement model of the soil-concrete pipeline is established through the finite element software, and its damage constitutive relationship is defined, and the initial damage speed of the pipeline is finally obtained;

[0047] Step 3: Use offshore construction ships for water positioning, conduct underwater drilling and bury vibration sensors at predetermined vibration monitoring positions;

[0048] Step 4: During the whole process of project construction, through the dynamic signal acquisition and analysis system, the monitored vibratio...

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Abstract

The invention discloses a safety monitoring and evaluating method for adjacent construction vibration influences on an underground buried pipeline. The method includes the specific steps that measuring lines are determined on a straight line, closest to the buried pipeline, at the construction vibration position and in the pipeline direction, and corresponding monitoring points are arranged; a construction boat on the sea is used for performing overwater positioning and underwater drilling, and a vibration sensor is buried; a dynamic signal collecting and analyzing system is used for collecting monitored vibration data in real time in the whole process of engineering construction; an evaluation value of the safety state of the pipeline is obtained through combining of a local elaborate model of a soil body-concrete pipeline, and the safety of the pipeline is evaluated. A monitoring system for the vibration response of the adjacent underwater buried pipeline under construction vibration is built up, the vibration response of the adjacent underwater buried pipeline under the construction vibration in offshore engineering is safely and accurately monitored, and the local elaborate model is built and combined with the monitored data to perform safety evaluating and early warning on the adjacent underwater buried pipeline.

Description

technical field [0001] The invention relates to a structural safety monitoring and evaluation method, in particular to a safety monitoring and evaluation method for underwater buried pipelines affected by adjacent construction vibrations. Background technique [0002] During the construction of offshore projects, relatively obvious construction vibrations are often generated, which is likely to adversely affect the safety of adjacent existing underwater buried pipelines. Offshore engineering construction vibration mainly includes excavation vibration, blasting vibration, piling and ramming vibration, etc. The vibration generated by the construction propagates out of the site in the form of vibration waves through the surrounding soil layer, causing the vibration response of the buried pipeline adjacent to the construction site, which has an adverse effect on the normal use and safe operation of the buried pipeline. [0003] Buried pipelines are located in the ground, and of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D1/00
Inventor 苏静波诸裕良张栋张龙朱瑞虎朱义欢马志国
Owner HOHAI UNIV
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