Construction method of prestress common pipe ditch

Abstract

The invention discloses a construction method of a prestress common pipe ditch, which comprises the following steps of: a, excavating a groove; b, binding and fixing circular reinforcing steel bars and longitudinal reinforcing steel bars and laying a template; c, pouring several sections of concrete pipelines (4) in section from front to back; d, drawing out sleeves of outside warped ends (2.1) of all prestress reinforcing steel bars (2) to form a tensioning groove (6) corresponding to the outside warped end (2.1) of each prestress reinforcing steel bar (2) one by one which is reserved on each section of concrete pipe (4); e, tensioning the outside warped end (2.1) of the prestress reinforcing steel bar (2) in each tensioning groove (6) and anchoring with an anchorage device (7) on each tensioning end; and f, filling and floating each tensioning groove (6) with fine aggregate concrete. The construction method can reduce leakage hidden trouble, saves steels and has convenient construction process.

Description

technical field [0001] The invention relates to the field of municipal underground structures, in particular to a construction method for a prestressed common pipe ditch. Background technique [0002] With the rapid development of the national economy, the application range of prestressed common trenches under municipal roads is becoming more and more extensive. The prestressed common pipe trench is a square tube of prestressed reinforced concrete structure buried underground and extending along the length direction. Power pipelines, gas pipes, water pipes and heating pipes, etc., the prestressed common pipe trench makes the distribution of the above pipelines neat and reasonable, and is convenient for maintenance. [0003] The construction method of the prestressed common trench in the prior art includes the following steps. [0004] a. Excavate the trench to accommodate the common prestressed pipe trench. [0005] b. Bind and fix the steel bars in the circumferential di...

AI Technical Summary

Problems solved by technology

The construction joints are prone to water leakage, so a ring of water-stop steel plates is pre-embedded in the concrete at the construction joints. However, due to too many construction joints, the hidden danger of water leakage is still relatively large; moreover, it needs to consume a large amount of water-stop steel plates, and the steel consumption is large; moreover, Each time the prestressed steel bars of a first-cast pipe section are stretched, the non-prestressed steel bars anchored with the first-cast pipe section and the next first-cast pipe section at the same time need to be cut before tensioning. The reconnection of non-prestressed steel bars, the construction process is quite troublesome

Images