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Airbag type automatic protection device for rock-fill dam panel disengagement and design method of device

A technology for automatic protection and rockfill dams, applied in the direction of coastline protection, dams, barrages, etc., can solve problems such as damage, achieve the effect of improving the stress state, preventing surface cracks and staggered platforms

Active Publication Date: 2017-06-09
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, in the prior art at home and abroad, there is no device that automatically protects the panel immediately after it is empty, and prevents further damage to the anti-seepage system

Method used

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  • Airbag type automatic protection device for rock-fill dam panel disengagement and design method of device
  • Airbag type automatic protection device for rock-fill dam panel disengagement and design method of device
  • Airbag type automatic protection device for rock-fill dam panel disengagement and design method of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Example 1: The parameters of a concrete face rockfill dam are listed in Table 1, and the critical void depth of the face plate is determined according to the crack resistance criterion and the fracture resistance criterion respectively.

[0083] Table 1 Calculation parameters of critical voiding of a concrete face rockfill dam

[0084]

[0085] refer to Figure 6-a , Figure 6-b :

[0086] Figure 6-a The relationship between the tensile stress on the surface of the panel and the depth of the void at the void point calculated according to the elastic assumption in the process of voiding the panel is plotted. According to the tensile strength of the panel concrete, it can be calculated that the elevation of the critical void point is about 98.5m, which is also That is, the void depth of the panel determined by the crack resistance analysis is about 1.5m. Figure 6-b The relationship between the void depth determined according to formula (6) and formula (7) and the...

Embodiment 2

[0102] Example 2: The critical void depth of a concrete face rockfill dam face determined according to the parameters described in Table 1 and the principle of failure resistance is 2m. Now, given the following supplementary conditions, try to determine the longitudinal and latitudinal tensile strength of the protective airbag strength.

[0103] Supplementary parameters of airbag strength determined in Table 2

[0104]

[0105] Figure 9 The requirements for the strength of different numbers of airbags installed according to formulas (9) to (12) are plotted in the figure. It can be seen that the more airbags under a single panel, the higher the requirements for the tensile strength of the airbags. Low, in this case, when the number of protective airbags is 10, the tensile strength is T=T'=6.89kN / m. The material for making the airbag can be selected according to the strength requirement.

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Abstract

An airbag type automatic protection device for concrete panel rock-fill dam panel disengagement is arranged in an extrusion side wall under a concrete panel rock-fill dam panel. The automatic protection device is characterized in that the automatic protection device is composed of a protection airbag, an air generator and an automatic triggering device; the protection airbag is installed on the portion, close to the dam crest part, in a precast concrete extrusion side wall; the air generator is connected with the protection airbag through a breather pipe; the automatic triggering device is internally provided with a disengagement quantity detector electric ignition mechanism, and the electric ignition mechanism is connected with the air generator and controls starting of the air generator. According to the airbag type automatic protection device, the blank in the prior art is filled up, when disengagement occurs between the panel and cushion materials and the disengagement amount reaches the quantity value harming the concrete panel safety, the airbag type protection device is automatically started, the inflatable airbag supports the panel, the stress state of the concrete panel is improved, and secondary diseases such as surface cracks, slab staggering and the like are prevented.

Description

technical field [0001] The invention relates to a protection device for a dam face, in particular to an airbag-type automatic protection device for the face of a concrete face rockfill dam to be hollowed out, and also relates to a design method of the airbag-type automatic protection device. Background technique [0002] Concrete face rockfill dams are favored by the dam industry at home and abroad because of their adaptability to topographic and geological conditions, the economy of local materials, and the convenience of construction and operation and maintenance [1,2]. Since my country built the first concrete face rockfill dam in 1982, its design, construction and monitoring technology have made great progress, and now it has become the country with the largest number of concrete face rockfill dams that have been built, are under construction and are planned to be built [3]. Among them, the Qingjiang Shuibuya face rockfill dam, which has been completed and put into opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/06E02B3/12
CPCE02B3/122E02B7/06
Inventor 傅中志陈生水钟启明李国英霍家平米占宽魏匡民石北啸任强
Owner NANJING HYDRAULIC RES INST
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