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Lithologic delamination method for complex layered dam base

A layered and dam foundation technology, applied in the direction of earthwork drilling, measurement, borehole/well components, etc., can solve the problem that there is no better stratum layering method

Inactive Publication Date: 2009-07-22
POWER CHINA KUNMING ENG CORP LTD
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Problems solved by technology

Under the engineering geological conditions of complex layered dam foundations, there is no better rock stratification method at present

Method used

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  • Lithologic delamination method for complex layered dam base
  • Lithologic delamination method for complex layered dam base
  • Lithologic delamination method for complex layered dam base

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Embodiment

[0012] Combined with the geological exploration data of Jinsha River Guanyinyan Hydropower Station, the specific implementation of the present invention will be described in detail.

[0013] Taking drilling hole No. 138 (ZK138) as an example, the lithology part is extracted from the drilling database, and the lithology is identified by a code, such as "11009" for "fine sandstone", "11007" for "siltstone", "11012 " stands for "argillaceous siltstone". According to its strength and lithology assignment, hard sandstone is classified as 20, medium-hard rock of siltstone is classified as 10, and soft rock of argillaceous siltstone is classified as 0. The lithological data of ZK138 are shown in Table 1.

[0014] Table 1 Lithology data of ZK138

[0015]

[0016] Take the depth as the ordinate, assign the rock formation as the abscissa, and draw a broken line diagram on the borehole section, which is the RLQD diagram, as shown in figure 1 shown. Such as figure 2 The layered di...

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Abstract

The invention relates to a method for delaminating complex layered dam foundation according to lithology. According to terrane data explored by drilling, the terrane is classified and evaluated according to strength and lithology, the values of the same level are distinguished, drilling depth is taken as the longitudinal coordinate, the terrane value is taken as the abscissa, and all terranes are reflected on a drilling section layered graph by using the mode of a line chart; the layered graphs of all boreholes on any exploration line are analyzed, the similarity of the layered graphs of all boreholes is analyzed, and combined with attitude of bed, the layering is obtained; distinct characteristics of adjacent layers designate a geological boundary between layers, and the geological boundary can intuitively expose the distribution rule of terranes with different strength of the complex layered dam foundation. The method sufficiently utilizes rich drilling exploration data, intuitively and vividly expresses lithology difference in the boreholes from the aspect of rack strength difference, is beneficial to lithology layering under dam foundation engineering geological conditions with different complexity, simultaneously is beneficial to communication between different specialized fields, and lays foundations for adopting correct and suitable dam foundation solidification processing measures.

Description

technical field [0001] The invention belongs to the technical field of infrastructure engineering geological survey, and in particular relates to a method for layering lithology of complex layered dam foundations. Background technique [0002] The traditional stratigraphic stratification method is mainly based on the combination of stratum lithology, depositional rhythm and stratum age, and then uses mineral, fossil, isotope and other testing methods to improve the accuracy of stratification. In the area of ​​the dam site of the hydropower station project, the area occupied by the dam site is relatively small. At the beginning, the stratification results from the middle boundary to the order (group) of the regional geological data can be fully utilized, combined with the geological conditions of the dam site to supplement and improve, which can form a basic Reports and drawing results. However, according to the regulations of hydropower and water conservancy projects, there...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B47/04E21B49/00
Inventor 王忠高强李开德魏植生
Owner POWER CHINA KUNMING ENG CORP LTD
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