Method for measuring and calculating intervals between rib sills of soft foundation energy dissipation type debris flow drainage groove and application

Abstract

The invention discloses a method for measuring and calculating intervals between rib sills of a soft foundation energy dissipation type debris flow drainage groove and application. According to the method for measuring and calculating the intervals between the rib sills, firstly, the longitudinal gradient of the drainage groove is determined according to measurement and calculation of a large scale topographical map or field investigation and actual measurement; then, the weight degree of debris flow is determined according to calculation of a debris flow weight degree calculation formula or actual sampling and actual measurement; finally, the intervals between the rib sills of the soft foundation energy dissipation type debris flow drainage groove are determined according to the measurement and calculation formula of the intervals between the rib sills. According to the method, the three major factors of the longitudinal gradient of the drainage groove, the weight degree of the debris flow and the buried depth of the rib sills of the drainage groove are comprehensively considered, the measurement and calculation formula of the intervals between the rib sills of the soft foundation energy dissipation type debris flow drainage groove is obtained by means of the arrangement characteristic of the rib sills of the soft foundation energy dissipation type debris flow drainage groove and data fitting performed according to an indoor simulation test result, the intervals between the rib sills under different conditions can be reasonably determined, a scientific basis is provided for designing debris flow disaster prevention and treatment engineering, and the measurement and calculation method makes calculation easy and convenient and meets the requirements of the engineering.

Description

technical field

[0001] The invention relates to a calculation method for rib-sill spacing of a soft-foundation energy-dissipating type debris flow drainage channel, and its application in the design of rib-sill spacing in prevention and control engineering. Background technique

[0002] Debris flow is a solid-liquid two-phase fluid containing mud, sand and stones between landslides and water currents. It is in the state of turbulent and laminar flow. It has the characteristics of sudden explosion, fast movement, huge energy, strong impact, It is a common type of geological disaster in mountainous areas due to its activity characteristics such as short duration. At present, the debris flow drainage channel is an effective engineering measure to prevent and control debris flow disasters. In the long-term practice of debris flow disaster prevention and mitigation, the form of debris flow drainage channels has gradually formed and improved; one of the commonly used forms of deb...

Examples

Embodiment 1

[0030] Such as figure 1 , figure 2 shown. A debris flow ditch is a branch ditch on the right bank of Dajinchuan, the main stream of the upper Dadu River, with a drainage area of ​​8.5km 2 , the main ditch is 6.20km long, the highest point of the basin is 3650m above sea level, and the lowest point is 2700m above sea level. It has the topographical characteristics of high mountains, deep valleys and steep slopes, which provide favorable topographic and geomorphic conditions for the formation and activities of debris flows.

[0031] In order to alleviate local debris flow disasters, it is planned to build a soft foundation energy dissipation debris flow drainage channel in the main channel of debris flow. And the row groove side wall 2 on both sides thereof. Next, measure and calculate the distance between rib sills 1 of the row of guide grooves, and the specific steps are as follows:

[0032] The first step is to determine the longitudinal gradient I of the row guide groov...

Embodiment 2

[0035] Such as figure 1 , figure 2 shown. A debris flow ditch is a tributary ditch on the right bank of the Sunshui River, a tributary of the Anning River. The main ditch is 4.20km long and the drainage area is 4.10km 2 , flowing through a certain county, is a frequent disastrous debris flow ditch. The gully debris flow formation area is steep, the slopes on both banks are extremely unstable, and there are landslides, and disastrous debris flows often break out in the ditch. If the blocking project is adopted, the engineering quantity and investment are quite large, and the effect is not very obvious.

[0036] In order to alleviate local debris flow disasters, it is planned to build a soft foundation energy dissipation debris flow drainage channel in the debris flow channel accumulation area. 1 and the row guide groove side wall 2 on both sides thereof. Next, measure and calculate the distance between rib sills 1 of the row of guide grooves, and the specific steps are as...

technical field

[0001] The invention relates to a calculation method for rib-sill spacing of a soft-foundation energy-dissipating type debris flow drainage channel, and its application in the design of rib-sill spacing in prevention and control engineering. Background technique

[0002] Debris flow is a solid-liquid two-phase fluid containing mud, sand and stones between landslides and water currents. It is in the state of turbulent and laminar flow. It has the characteristics of sudden explosion, fast movement, huge energy, strong impact, It is a common type of geological disaster in mountainous areas due to its activity characteristics such as short duration. At present, the debris flow drainage channel is an effective engineering measure to prevent and control debris flow disasters. In the long-term practice of debris flow disaster prevention and mitigation, the form of debris flow drainage channels has gradually formed and improved; one of the commonly used forms of deb...

Examples

Embodiment 1

[0030] Such as figure 1 , figure 2 shown. A debris flow ditch is a branch ditch on the right bank of Dajinchuan, the main stream of the upper Dadu River, with a drainage area of ​​8.5km 2 , the main ditch is 6.20km long, the highest point of the basin is 3650m above sea level, and the lowest point is 2700m above sea level. It has the topographical characteristics of high mountains, deep valleys and steep slopes, which provide favorable topographic and geomorphic conditions for the formation and activities of debris flows.

[0031] In order to alleviate local debris flow disasters, it is planned to build a soft foundation energy dissipation debris flow drainage channel in the main channel of debris flow. And the row groove side wall 2 on both sides thereof. Next, measure and calculate the distance between rib sills 1 of the row of guide grooves, and the specific steps are as follows:

[0032] The first step is to determine the longitudinal gradient I of the row guide groov...

Embodiment 2

[0035] Such as figure 1 , figure 2 shown. A debris flow ditch is a tributary ditch on the right bank of the Sunshui River, a tributary of the Anning River. The main ditch is 4.20km long and the drainage area is 4.10km 2 , flowing through a certain county, is a frequent disastrous debris flow ditch. The gully debris flow formation area is steep, the slopes on both banks are extremely unstable, and there are landslides, and disastrous debris flows often break out in the ditch. If the blocking project is adopted, the engineering quantity and investment are quite large, and the effect is not very obvious.

[0036] In order to alleviate local debris flow disasters, it is planned to build a soft foundation energy dissipation debris flow drainage channel in the debris flow channel accumulation area. 1 and the row guide groove side wall 2 on both sides thereof. Next, measure and calculate the distance between rib sills 1 of the row of guide grooves, and the specific steps are as...

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