Method for calculating paving interval of geogrids for treating bump at bridge-head through abutment back reinforcement

Abstract

The invention discloses a method for calculating the paving interval of geogrids for treating bump at bridge-head through abutment back reinforcement. The method comprises the steps of S1, acquiring geological prospecting data of a foundation where a reinforced abutment is located, calculating consolidation settlement of the foundation according to actual foundation treatment mode, roadbed filling type and design test data, and then conducting anticipatory computing of post-construction settlement of the foundation; S2, deducing a geogrid stress solving equation according to the elastic membrane theory, and calculating the paving interval of the geogrids in the anchoring treatment mode and reverse packaging treatment mode according to the practical treatment condition of the geogrids. According to the method, the interval of the geogrids under anchoring and reverse packaging conditions is calculated by means of a model which better accords with the practical stress condition of the geogrids. By using the interval calculation method for guiding design and construction of the geogrids, differential settlement of a transition section of a bridge can be well treated.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a method for calculating the paving interval of a geogrid used to reinforce the back of the abutment to control the vehicle jumping disease at the bridge head. Background technique [0002] In recent years, my country's expressways have developed rapidly. According to the "Statistical Bulletin on the Development of the Transportation Industry in 2014": by the end of 2014, the total mileage of national highways reached 4.4639 million kilometers, and there were 757,100 highway bridges, that is, there is a highway bridge every 5.89 kilometers. , highway bridges occupy a very important position in the composition of highways in our country. Bridge head jumping caused by uneven settlement of road-bridge transition section is a common problem in expressway operation. When the settlement between them is inconsistent, uneven settlement will occur. This uneven settlement will cause "steps"...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a geogrid paving interval that calculates and uses geogrid to reduce the subsidence of the abutment back reinforcement to control the bridge head jumping disease in view of the defect that the transition section of the highway bridge in the prior art is prone to settlement calculation method

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