A Calculation Method for Excavation Volume of Earth Crown Shelling in Karst Depression

A calculation method and karst technology, applied in design optimization/simulation, geometric CAD, etc., can solve problems such as uneven distribution of geotechnical layers, and achieve the effect of fast and simple excavation engineering quantity and fast and simple calculation

Active Publication Date: 2020-04-14
ZHENGYE ENG & INVESTMENT INC
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Problems solved by technology

However, for depressions, the surrounding terrain is generally relatively steep, the distribution of karst ditches, troughs and karst fissures is wide, the collapse accumulation layer is thick, and the distribution of rock and soil layers is very uneven. Buildings (structures) face the following problems: one is to reduce the workload of depression excavation by determining a reasonable excavation center; the other is to reduce the excavation cost of slope engineering by determining a reasonable excavation center. problem; the third is how to achieve precise excavation in order to meet the needs of building spherical buildings after determining a reasonable excavation center

Method used

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  • A Calculation Method for Excavation Volume of Earth Crown Shelling in Karst Depression
  • A Calculation Method for Excavation Volume of Earth Crown Shelling in Karst Depression
  • A Calculation Method for Excavation Volume of Earth Crown Shelling in Karst Depression

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Embodiment 1

[0024] Embodiment 1: as Figure 1-Figure 3 As shown, a calculation method for excavation volume of karst sub-global crown shelling, with the excavation center as the origin and the vertical upward direction as the positive direction of the Z-axis, a cylindrical coordinate system is established.

[0025] It is considered that the height difference h between the original ground and the excavated ground is a function of the angle α and the radius r in cylindrical coordinates, satisfying the following formula:

[0026] h=H(α,r) (1)

[0027] Then the excavation volume can be expressed by the following formula:

[0028]

[0029]

[0030] The horizontal plane takes the origin as the center point, divides the horizontal plane into n parts according to the angle, and the angle of each part is Δα i , whose Δα i The angle between the bisector of the angle and the positive direction of the polar axis X axis α i is also a fixed value, the above formula can be rewritten as follows...

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Abstract

The invention discloses a calculation method for a spherical crown type husking excavation volume of a karst depression. The method comprises the steps that space coordinates of an excavation center are determined in the karst depression; a cylindrical coordinate system is established, 24 sections are cut in the cylindrical coordinate system, and the included angle between every two sections is 15degrees; the 24 sections are numbered; the excavation area of each section is numbered; the volume of the rotating body of each irregular closed graph is solved; the contribution of each section to the total spherical crown type shelling excavation square quantity V is solved; and the spherical crown type shelling excavation volume V is obtained. Compared with other engineering excavation amountcalculation methods, the method has the characteristics of convenience, quickness and intuition, can provide a guiding effect for selection of the karst depression excavation center, and can quickly and simply calculate the excavation engineering amount and intuitively express excavation geotechnical engineering information in the karst depression spherical crown type shelling excavation engineering.

Description

technical field [0001] The invention relates to a method for calculating the excavation volume of karst depression earth crown shelling and belongs to the technical field of karst depression earth crown shelling excavation. Background technique [0002] Karst is a variety of geological phenomena produced by the erosion of soluble rocks by water. In my country's carbonatite and salt mountain areas, strong karstization often forms large-scale subsidence depressions, forming a closed negative topography. The topography of depressions generally has large undulations, steep slopes, and local mountains are steep, forming cliffs and cliffs. For buildings (structures) with spherical crowns, taking advantage of the unique landform advantages of depressions is beneficial to save a lot of excavation work; at the same time, there are often drainage channels leading to groundwater in karst depressions, combined with artificial drainage corridors, Drainage issues may also be resolved. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20
Inventor 沈志平吴斌付君宜王鸿刘慧靳颜宁蒋媛媛
Owner ZHENGYE ENG & INVESTMENT INC
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