A Method of Exploring the Overburden of Riverbed by Using Variable Angle and Inclined Boreholes

A technology of inclined drilling and covering layer, which is used in directional drilling, earth-moving drilling, and on-site foundation soil survey. major problems, to achieve the effect of saving manpower and capital investment, eliminating security risks, and achieving accurate results

Active Publication Date: 2021-04-20
长江岩土工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Practice shows that it is difficult to adapt to such a special mountainous river by the commonly used method of riverbed overburden exploration, where the geophysical prospecting is limited by narrow sites and complex strata, and the accuracy of the results often cannot meet the engineering needs; the large platforms or ships required for conventional drilling cannot directly reach the site , the operation cycle is long, the cost of manpower and material resources is large, and the water construction is facing severe safety production problems

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  • A Method of Exploring the Overburden of Riverbed by Using Variable Angle and Inclined Boreholes
  • A Method of Exploring the Overburden of Riverbed by Using Variable Angle and Inclined Boreholes
  • A Method of Exploring the Overburden of Riverbed by Using Variable Angle and Inclined Boreholes

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Embodiment Construction

[0035] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

[0036] Referring to the accompanying drawings, it can be seen that the method for exploring the overburden of the riverbed by using variable-angle inclined boreholes comprises the following steps:

[0037] Step 1, measure the topographic cross-section of the channel

[0038] Measuring the topographic cross-section of the river is to measure the topographic shape of the cross-section of the river. According to the underwater topographic curve AM 1 B (such as Figure 2a shown) can obtain the key data that need to be prepared before construction, such as the width of the river water surface w (the length of the line segment AB), the ...

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Abstract

The invention discloses a method for exploring a river bed covering layer by using a variable-angle inclined borehole, and relates to the technical fields of water conservancy and hydropower engineering and geotechnical engineering investigation. It includes the following steps: Step 1, measuring the topographic cross-section of the river channel; Step 2, preliminarily drawing the contact surface of the riverbed overburden layer / bedrock; Step 3, selecting the location of the geological drilling rig; Step 4, initial inclined drilling construction; Step 5 , to correct the construction of inclined boreholes and to obtain the main features of the overburden of the river bed. The invention is easy to operate and has accurate results, and especially has good adaptability to the exploration of the canyon rapids river cover layer in the southeast of the plateau.

Description

technical field [0001] The invention relates to the technical fields of water conservancy and hydroelectric engineering and geotechnical engineering survey, more specifically, it relates to a method for exploring riverbed overburden by using variable-angle inclined drilling. Background technique [0002] In the construction of water conservancy and hydropower engineering dams and geotechnical engineering crossings and crossing buildings on rivers, it is necessary to first find out important characteristics such as the distribution thickness, structural level, and material composition of the riverbed covering layer, which is the basis for the analysis of major engineering geological problems related to the covering layer. Demonstration, building foundation utilization or treatment design provides reliable base results. Therefore, the exploration of the characteristics of the riverbed overburden is not only the central task of wading engineering geological survey work, but als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D1/02E21B7/04E21B49/00
CPCE02D1/02E21B7/04E21B49/00
Inventor 黄振伟曾立新刘浩张明强潘坤雷明汪勇马力刚程方权冯进伟门春文黄海宇肖冬顺袁洋洋倪柱柱李迷张行赵冰波茆金柱
Owner 长江岩土工程有限公司
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