Control road for differential settlement at exchanging position of road and structure

Abstract

The invention relates to a method for controlling differential settlement at a joint point of the road and a construction in the technical field of constructional engineering. The method comprises the steps as follows: a lower pile foundation of the construction is constructed, that is, constructing cement-soil stirring friction piles and short piles used for the partial reinforcement of a groundwork, wherein, (1) the cement-soil stirring friction piles support the load transferred from the upper part by the surrounding friction of pile bodies; (2) the short piles are piled between long pilesand reinforce the soil between the long piles to ensure that an earth-retaining structure is integrated as a whole when excavating; a second step is the treatment of the groundwork within a slope junction section which comprises constructing deep stirring piles with variable lengths and a road of the slope junction section with the range of the protection of a soft soil foundation of the slope junction section; a third step is constructing a bedding course and a structure of the construction; a fourth step is constructing a modified plate within the range of the protection of the groundwork of the slope junction section; and a fifth step is paving the road. The invention not only can simplify the construction technology, reduce the construction expense and shorten the construction period but also can avoid the maintenance expense caused by the differential settlement.

Description

technical field [0001] The invention relates to a soft soil foundation treatment method in the technical field of construction engineering, in particular to a method for controlling differential settlement at junctions of roads and structures. Background technique [0002] For roads built on soft ground, when there are structures such as bridges and box culverts, vehicles will bounce back when passing through the junction of these roads and structures, which is referred to as the phenomenon of "jumping at the bridge head". The reason for this phenomenon is that there is a large differential settlement between the structure and the road. According to the actual test on site, when the differential settlement is 1cm and the driving speed is greater than 50km / h, passengers will feel a slight jumping sensation. When the differential settlement reaches 3cm and the driving speed is greater than 40km / h, passengers will have a very obvious sense of bouncing. When the differential s...

AI Technical Summary

Problems solved by technology

The invention solves the problem that the construction cost increases due to the complex construction process and the use of many building materials in the existing construction method. It can not only simplify the construction process, reduce the construction cost, shorten the construction period, but also avoid the problems caused by differential settlement. maintainance fee

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