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A floating raft roadbed structure

A technology of floating rafts and subgrades, which is applied in the direction of infrastructure engineering, roads, roads, etc., and can solve the problems of outage trains, difficult handling, and high economic costs, and achieve the effects of reducing weight, avoiding additional deformation, and ensuring normal use

Pending Publication Date: 2018-12-18
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the subgrade of the high-speed railway subsides and deforms, it is difficult to deal with, the economic cost of the treatment is high, and in severe cases, the train needs to be stopped for rectification, which will cause huge economic losses and social impact

Method used

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  • A floating raft roadbed structure

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Such as figure 1 in,

[0018] A floating raft type roadbed structure, including a floating raft box 3, the floating raft box 3 is buried in a foundation pit 1, and foundation treatment piles 2 are arranged under the foundation pit 1, and the top of the floating raft box 3 is filled Subgrade 5.

[0019] In a preferred solution, geotextile 6 is laid around the foundation pit 1.

Embodiment 2

[0021] On the basis of embodiment 1, the floating raft box 3 adopts a hollow concrete box structure, and the floating raft box 3 is provided with a plurality of vertical partitions 9 on the top of the floating raft box 3 for supporting the roadbed. The concrete slab 7 of 5 and the waterproof layer 4 are provided on the inner and outer walls of the pontoon 3.

Embodiment 3

[0023] On the basis of Example 1, the concrete slab 7 is provided with an air duct 8, one end of the air duct 8 is located in the floating raft box 3, and the other end passes through the roadbed 5 and extends to the outside of the roadbed 5.

[0024] Example 3:

[0025] On the basis of Example 1, the inner wall of the pontoon 3 is made of metal or organic composite materials. The adopted metal-based composite material can realize the floatation of the pontoon under the buoyancy of the water in the pontoon 3, so as to achieve the purpose of lifting the roadbed 3 with the amount of filling and drainage.

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Abstract

A floating raft roadbed structure includes a floating raft tank, The floating raft tank is buried in a foundation pit, A foundation treatment pile is arranged below the foundation pit, the top of thefloating raft box is filled with a roadbed, One side of the floating raft tank is provided with a guide pipe, an inlet pipe and an outlet pipe, one end of the inlet pipe and the outlet pipe is arranged on the sidewall of the floating raft tank, the outlet pipe in the floating tank is connected with a pump arranged in the floating tank, the guide pipe is arranged on the top of the floating raft tank and is communicated with the external atmosphere, and the upper end of the guide pipe is located above the ground. At that same time, when the initial tank is partially fil with water or other liquid, the additional stress of the foundation can be adjusted by increasing or decrease the weight of the liquid, so that the elevation of the roadbed can be restored, and the normal use of the highway and the railway, especially the high-speed railway, can be ensured.

Description

Technical field [0001] The invention relates to the field of railway subgrade and road construction, in particular to a floating raft type subgrade structure. Background technique [0002] Subgrade is the foundation of railways and highways. It is a strip-shaped structure constructed as a pavement foundation according to the location of the route and certain technical requirements. The roadbed is mainly built of soil or stone. The stability of the roadbed directly affects the service life of railways and highways and the safety of driving vehicles. [0003] my country's topography and geological conditions are complex, and there are large areas of deep and soft soil in the east. When building roadbeds in these areas, roadbed treatment costs are high and settlement and deformation control is difficult. Under the long-term load of the external environment, the line and the driving vehicles, the deep soft soil of the foundation will be vertically deformed due to compression. Unifor...

Claims

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Application Information

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IPC IPC(8): E01C3/00E02D27/12E02D27/18E02D27/32
Inventor 叶阳升李中国蔡德钩陈锋闫宏业王鹏程崔颖辉郭增强王立军
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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