Construction method for filling intercommunication ramps with foam light soil

Abstract

The invention discloses a construction method for filling an intercommunication ramp by using foam light soil. The construction method comprises the following steps: (1) preparing cement paste; 2) preparing foam; (3) preparing foam light soil; (4) preparing a pouring area site; (5) casting foam light soil in situ, using the bottommost layer as the first layer for pouring, and arranging pouring areas every 10-15 m in the longitudinal direction of the roadbed; after slope excavation is completed, performing sequential construction from the bottom layer to the upper layer in a layered mode during filling, the single-layer pouring thickness is controlled to be 60 cm, the top layer pouring thickness is controlled to be 0.3-1.0 m according to the designed elevation, and when pouring is conducted towards the upper layer, performing 90 cm construction; filling the edge covering lime soil layer by layer from bottom to top according to the ultra-width of 1 m, the compaction degree meets the design requirement, and after the edge covering lime soil is filled to the top elevation, performing slope brushing on the edge covering lime soil; performing roadbed lime soil filling after the strength of the foam light soil meets the requirement, performing filling layer by layer, the compaction degree meets the design requirement, and adjusting transverse and longitudinal slopes of a roadbed; and 6), performing maintenance, according to the method, the load of the roadbed base can be obviously reduced, post-construction settlement of the roadbed is eliminated, and the diseases such as bumping at the bridgehead are solved.

Description

technical field [0001] The invention relates to a ramp construction method, in particular to a construction method for filling an intercommunicating ramp with foam light soil. Background technique [0002] Expressway is an important lifeline in the national transportation network, and its construction is often inseparable from the construction of steep mountain roads and complex working conditions. At this stage, expressways in areas with steep mountain roads and complex working conditions are usually constructed by conventional earth subgrade filling methods, and generally large retaining walls are built at the foot of a low slope and constructed by conventional filling and compaction methods. However, this traditional method is prone to problems such as dangerous engineering environment, large land acquisition area required for slope grading, large filling volume and easy damage to the current hillside environment. In addition, during the construction period of the conven...

AI Technical Summary

Problems solved by technology

However, this technology is suitable for steep mountain roads and complex working conditions, and cannot be applied to the construction of off-ramps that require normal traffic on existing expressways.

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