Construction method of prestressed splint abutment backfilling and reinforcement

Abstract

The invention discloses a construction method of prestressed splint abutment backfilling and reinforcement. The method comprises the following steps: 1) leveling corners of two side surfaces of an abutment, placing preformed reinforced concrete splints on the two sides of the abutment, reserving an anchor plate and a tension pipe hole on the concrete splint; 2) placing a plastic pipeline on the filling near to the upper layer, wherein the plastic pipeline is provided with turnbuckles on the two ends, passes through the tension pipe hole on the anchor plate, is filled with water and the two ends of the plastic pipeline are closed; 3) filling and compacting the upper layer, inserting a steel strand, tensioning two ends of the steel strand by a tensioning jack, after the two splints are clamped and stabilized by the tension force, performing anchor sealing and grouting, and finishing the mounting and construction process of the splints. The abutment is prevented from being easily deformed under stress through the stress controlling of tension force, and therefore the stability of the backfill soil of the abutment is ensured and the settlement of the backfill soil is reduced.

Description

technical field [0001] The invention belongs to the technical field of abutment back construction, and in particular relates to a construction method for backfilling and strengthening a prestressed plywood abutment back. Background technique [0002] With the country's increasing investment in transportation infrastructure construction, more and more highway bridges are being built, and the backfill soil of many bridge abutments is relatively high. Since the backfill soil of bridge abutments is generally made of permeable sandy soil, the gap between soil particles The cohesive force is weak. After the construction is completed, under the repeated action of the vehicle load, the sandy backfill soil behind the bridge abutment is prone to deformation to both sides of the road, causing the backfill soil behind the abutment to drop, resulting in the "jumping" phenomenon of the abutment. affect driving safety. [0003] In recent years, many scientific research institutions and ex...

AI Technical Summary

Problems solved by technology

[0002] With the country's increasing investment in transportation infrastructure construction, more and more highway bridges are being built, and the backfill soil of many bridge abutments is relatively high. Since the backfill soil of bridge abutments is generally made of permeable sandy soil, the gap between soil particles The cohesive force is weak. After the construction is completed, under the repeated action of the vehicle load, the sandy backfill soil behind the bridge abutment is prone to deformation to both sides of the road, causing the backfill soil behind the abutment to drop, resulting in the "jumping" phenomenon of the abutment. impact on driving safety