Coarse-grained soil high-filled roadbed drainage structure and construction technique thereof

Abstract

The invention discloses a coarse-grained soil high-filled roadbed drainage structure and a construction technique thereof. The coarse-grained soil high-filled roadbed drainage structure mainly comprises a roadbed (1), fiber soil (2), a soil blocking wall (3), a drainage device (4), an anti-seepage earthwork cloth (12), an anti-filter earthwork cloth (6), a longitudinal drainage pipe (8) and a reflux valve (9). According to the coarse-grained soil high-filled roadbed drainage structure and the construction technique thereof, a water absorbent fiber material and coarse-grained soil are mixed and stirred to form the fiber soil (2) firstly and jointly filled in the high-filled roadbed (1) within a certain depth range; secondly, the anti-seepage earthwork cloth (12) is laid at the bottom of the fiber soil (2) and connected with the drainage device (4), and a transverse drainage pipe (5) and the drainage device (4) are connected through a rubber ring connector (10); and finally, the soil blocking wall (3) is arranged near a slope toe of a high-filled side slope platform, and rainwater is prevented from seeping in a side slope through the slope toe. The side slope can be prevented from being scoured under rainfall seepage, and accumulated water in the roadbed can be drained out in time; and the drainage effect is good, the compressive strength is high, construction is facilitated, the application range is wide, and the service life of a highway can be effectively prolonged.

Description

Technical field [0001] The invention relates to the technical field of highway roadbed construction and waterproofing and drainage, in particular to a drainage structure for high-filled roadbed with coarse-grained soil and its construction technology. Background technique [0002] With the progress of society and the rapid development of economy, my country's transportation industry, especially the construction of expressways, has achieved world-renowned achievements. However, due to various factors, the highways that have been put into operation have all suffered from various degrees of disease, among which the disease caused by subgrade water damage is particularly serious. As the foundation of the road pavement, the subgrade bears the diffusive stress of the driving load and the gravity of the pavement structure layer on the one hand; on the other hand, it is affected by various natural factors, of which water is one of the most important factors. It is extremely important to...

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Problems solved by technology

[0003] At present, two types of drainage are often used for high-fill embankment drainage, one is ground drainage facilities, including side ditches, drainage ditches, intercepting tanks, inverted siphons, and drop tanks, etc., and the other is underground drainage facilities, including open ditches and drainage channels , dark ditches, seepage ditches and seepage wells, etc.; the main function of the pavement drainage facilities is to guide the flow of rainwater during the rainfall process, so that most of the rainwater is discharged outside the scope of the roadbed in the form of runoff. However, for less intense rainfall, more The rainwater still enters the subgrade in the form of seepage, and continuously erodes the high-fill subgrade of coarse-grained soil; It can well solve the problem of rainwater accumulation during the rainfall process, but these structures also have a certain risk of collapse, and the impact of traffic load on the subgrade soil is not considered, and it cannot play a good role in the subgrade for low-intensity rainfall. protective effect

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