Embankment reinforcement replacement borrow technological process

Abstract

The invention belongs to the technical field of hydraulic engineering construction and relates to a process method for borrowing earth used for embankment reinforcement. The method solves the problemsof large earth volume required in an embankment reinforcement project, large operational pressure in land acquisition in the early period of the project, poor construction conditions and large project investment. The construction method is as follows: borrowing earth from dyke protection areas to earth up an embankment, and then getting earth beside river banks in wider floodplain areas with hydraulic power to fill borrow pits in the dyke protection areas to realize replacement earth borrowing for embankment reinforcement. The construction according to the method can save areas of permanentlyacquired land and acquired reclaimable land and consequently saves project investment. At present, upper reaches of rivers and river branches are blocked seriously. The replacement earth borrowing technique of the invention, together with river improvement, contributes to flood discharge and shipping condition enhancement by removing the earth volume in the floodplain areas.

Description

technical field [0001] The invention belongs to the technical field of resource and environment technology and water conservancy project construction, and relates to a process method of earth taking for embankment reinforcement. Background technique [0002] There are many rivers and lakes in our country, in order to improve the flood control capacity, the embankments built need to be perfected and reinforced. Embankment reinforcement mainly includes two types of earth-building construction. One is embankment embankment, and the engineering measures are heightening and thickening. The embankment can be divided into inner embankment, which is the inner slope of the embankment (backwater side) or outer embankment, that is, the outer slope of the embankment (facing the water). The filling soil on the side) is widened, and the internal and external slopes (the part ① in the schematic diagram of the process method) are rarely used for thickening at the same time, and the single-s...

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Problems solved by technology

[0004] The main disadvantages of the above methods of borrowing soil are: 1) The soil borrowing from the Bund requires a wide and high-lying Bund outside the embankment of the reinforcement section as a prerequisite, and embankment reinforcement should be carried out in the dry season. Generally, the Bund is planted in the dry season For crops, compensation for young crops is required before the soil is taken, and it is often difficult to meet the soil quality requirements for external cultivation and reinforcement because the Bund is mostly sandy soil, so it is necessary to change the embankment reinforcement design to internal cultivation

2) The land acquisition behind the embankment generally has a long transport distance. When the excavation depth is greater than 2m, the soil cannot be reclaimed after the excavation, and it needs to be used as a permanent land acquisition. The cost of land acquisition is high, resulting in productive resettlement. , the moisture content of the soil material is relatively high, in order to control the water content of the filling soil material, precipitation measures must be taken before the soil is taken out or the soil material taken out should be turned over for drying; for the soil borrowing area with a slightly higher terrain, it is mostly used as a temporary land acquisition and shallow mining , but because the soil is shallow, the general area of ​​land acquisition is large, and after the soil is reclaimed, it takes a long time to mature the soil with formula fertilization. ecological measures

3) The long-distance soil borrowing scheme is expensive due to the long transportation distance of soil materials, and some of them also involve land acquisition problems, which are mostly used when embankment reinforcement in urban sections

4) The above-mentioned soil extraction methods all need to lay out soil extraction and transportation roads, which need to occupy a certain amount of cultivated land, and cause environmental pollution such as dust and noise during construction

5) Land acquisition and land acquisition require the cooperation of local governments to confirm rights, demarcate boundaries and verify areas. Farmers are often prone to resentment due to land loss, resulting in land acquisition that cannot be carried out on time and affects the progress of the project.

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