Load shedding measure of foam sheet applied to upper burying type constructional work (such as culvert)

A technology of structures and measures, which is applied in the field of geotechnical engineering, can solve problems such as heavy stress, waste of manpower and material resources, and serious cracking and diseases in culverts

Inactive Publication Date: 2005-01-12
四川川东高速公路有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result of doing so is just the opposite, not only wasting a lot of manpower and material resources, but also causing greater stress on the culvert, and more serious cracking and disease

Method used

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  • Load shedding measure of foam sheet applied to upper burying type constructional work (such as culvert)
  • Load shedding measure of foam sheet applied to upper burying type constructional work (such as culvert)
  • Load shedding measure of foam sheet applied to upper burying type constructional work (such as culvert)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]Example 1 Flood drainage tunnel for tailings dam in Heimulin, Shaanxi: The tailings filling height at the top of the cave is 60 meters, and the flood discharge structure. The original structural section was designed according to the tailings dam with a height of 40 meters. Later, due to the change of the design plan, it has been completed The strength of the flood discharge tunnels is far from satisfactory, so Party A proposes to use load reduction measures to solve it. At that time, there was no EPS board in China, so we used local straw as the flexible material for the roof of the cave for unloading. According to calculations, we filled the roof with 50 cm thick straw. After 9 and a half years of on-site testing, the roof of the cave was The vertical earth pressure is reduced by about 2 / 3, thus ensuring the long-term normal operation of the original flood discharge tunnel. (Gu An'an, Zhao Yuqiong: "Field Experimental Study on the Measures of Reducing the Vertical Earth...

Embodiment 2

[0044] Example 2 The test culvert of Guangzhou-Huizhou Expressway in Guangdong Province has a top filling height of 32 meters and an arch culvert structure. According to the change of the top filling height, the thickness of the EPS board is selected to be 15-30 cm. According to the test observation, the vertical earth pressure on the roof of the cave is reduced by about 2 / 3. (Gu Anan, Jin Bin, Feng Ruiling: "Research on the Application of Load Reduction Measures (EPS Board Material) in High-Filled Culverts", Proceedings of the Seventh National Conference on Rock Mechanics and Engineering, August 2002).

Embodiment 3

[0045] Example 3 The test culvert of South-Guangzhou Expressway in Sichuan Province, the slab culvert with the filling height of two construction sites close to 10 meters. According to the test observations in 2010, the vertical earth pressure on the roof of the cave has decreased by about 2 / 3, and the horizontal earth pressure on the side of the cave has decreased by about 1 / 2, as shown in Figure 8. (Yang Fulin, Gu An'an, Zhang Shiping, Wang Xingping: "Experimental Research on Earth Pressure, Deformation and Load Reduction Measures of Highly Filled Culverts", November 2003).

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Abstract

This is a measure for reduce load on the EPS plates in covertly-up structure members (for example the culvert). 1) To define the strength intensity and thickness of EPS plate on the top of culvert according to the 1/2-1/3 pressure data of filled soil cylinder to define the thickness of it according the 2%-6% height of the culvert above the ground, for the pile based culvert according the practice condition. To define the strength intensity for use to side may be in accorded with the 1/2-1/3 value for use to the top. 2) To reduce load measures of the plane structure members use to the hole's side, adopt the calculate formula of horizontal pressure of soil cylinder, and for the members use to hole's top don't adopt the formula of pressure of soil cylinder.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering. Applicable to all kinds of buried structures in highways, railways, water conservancy, electric power, mining, municipal, petroleum, military and other departments, such as culverts, culverts, and tailgates under embankments and canal embankments for pedestrians, traffic, drainage, etc. Flood discharge tunnels under mine dams (reservoirs), corridors and drainage tunnels under earth-rock dams, buried underground substations, various underground passages and weapon shelters, etc. Background technique [0002] Culverts (pipes) are top-buried structures, and they are also one of the "lifeline projects" known internationally today. It is widely used in transportation, water conservancy, railway, mining, electric power, municipal, petroleum, military industry and many other departments. [0003] With the rapid development of high-grade highway construction in our country, the stress,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F5/00
Inventor 顾安全杨福林张世平王兴平王晓谋陈建勋刘满全魏瑞顾滨伍晓东郭婷婷冯瑞玲康琦邓国华王兴林陈雪梅
Owner 四川川东高速公路有限责任公司
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