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Construction and processing method of great deep vertical inclinometer pipe in stratum containing gravels

A technology of inclinometer tube and large depth, which is applied in basic structure engineering, basic structure test, construction, etc.

Inactive Publication Date: 2010-12-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention transforms the drill bit suitable for large-depth drilling in strata containing sandstone, and creates a process for preparing large-depth inclinometer pipes in strata containing sandstone, which solves the problem of measuring inclinometers in complex formation environments. The installation of the inclined pipe in place provides a strong guarantee for the smooth implementation of the construction site

Method used

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  • Construction and processing method of great deep vertical inclinometer pipe in stratum containing gravels
  • Construction and processing method of great deep vertical inclinometer pipe in stratum containing gravels
  • Construction and processing method of great deep vertical inclinometer pipe in stratum containing gravels

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Embodiment

[0027] figure 1 It is a construction site of a pipe jacking project in Jiangsu Province. After geological exploration, it was found that there are sandstone layers with a thickness of about 1.5m and 2m at 15m and 20m below the surface, respectively. Ashstone is a kind of calcareous concretion in soil, mainly composed of calcium carbonate and soil particles, impervious to water, high in strength, large in block shape and small in granular shape, with a diameter of 0.5 to 3.0 cm. Drilling in this formation is very prone to the phenomenon of difficult drilling and hole collapse. There are 4 jacking pipes starting from the caisson one after another. In order to understand the response mechanism of the surrounding stratum to pipe jacking and the influence law between two adjacent pipe jackings, it is planned to install between 1# and 2# jacking pipes. An inclinometer pipe with a buried depth of 30m and a diameter of 70mm.

[0028] The specific implementation steps are as follows:...

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Abstract

The invention relates to a construction and processing method of a great deep vertical inclinometer pipe in a stratum containing gravels, belonging to the technical field of rock-soil construction engineering. The great deep vertical inclinometer pipe construction and processing method comprises the following steps of: improving the traditional drill bit; leveling a field around a hole-point earth surface for positioning a drilling machine and a drill rod, and arranging verticality instruments at both side surfaces of the drill rod; ensuring the verticality of formed holes by regulating two aspects of the horizontality of the drilling machine and the verticality of the drill rod, and implementing hole drilling by controlling the verticality to be less than or equal to 1%; when the inclinometer pipe is processed and embedded, carrying out preprocessing on the inclinometer pipe, filling water into the inclinometer pipe, splicing a plurality of joints, sinking, backfilling, and flushing; and finally capping a pipe mouth for fixing. The invention ensures the quality of one-step hole forming without halfway changing the drill bit, thereby effectively solving the problem of installation of the vertical inclinometer pipe in the complex stratum and overcoming the shortages and the defects of the traditional process.

Description

technical field [0001] The invention relates to a method in the technical field of geotechnical construction engineering, in particular to a method for construction and preparation of a large-depth vertical inclinometer pipe in a sandstone-bearing stratum. Background technique [0002] Due to the complexity of geological conditions and the limitations of existing theories, on-site monitoring and testing is an important part of geotechnical engineering. Together with survey, design and construction, it constitutes an inseparable and complete system of geotechnical engineering. On-site monitoring is a direct response to construction effects and an important means to protect structures during construction. Its significance lies first in ensuring the construction quality and safety of the project, improving project efficiency and optimizing design. In addition, for a project, the addition of on-site monitoring and testing methods can effectively warn the internal performance ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
Inventor 孙阳沈水龙罗春泳
Owner SHANGHAI JIAO TONG UNIV
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