subject: Bridge Construction Supervision Bored On Several Major Issues - Engineering, Bored Piles - Machinery [print this page] Municipal bridge foundation in highway construction, are circulating their bored bored relatively low cost, noise pollution, the relative savings are relatively small and the duration and other characteristics have been widely used. But it is circulating Bored of the construction process more difficult, prone to quality problems, as supervisors must be emphasized that prior control, enhance and control and constantly sum up experience and improve the post-processing capabilities to the drilling pile to play an active role in the construction.
1, on the application of norms
In Shanghai bored piles of construction supervision should be based on the following specifications: "Highway Engineering Quality Inspection and Evaluation Standards" (JTGF80/1-2004), "Highway Bridge Construction Specifications" (JTJ041-2000), Shanghai "bored of order" (DG/TJ08-202-2007) and the "construction project management" (GB50319-2000).
It is noteworthy that in the Design Details supervision must be made when bored pile construction norms and standards should be implemented, as Shanghai, "bored of order" provisions of the construction of bored piles require a higher proposed to be applied.
Two main processes Bored Pile Pile measurement (benchmarks and elevation lead test, measurement Pile axis) laying casing (casing quality and laying quality check) rig in place (corrected Pile) drilling hole (mud Management) a clear hole (check hole depth) reinforced cage (made of reinforced cage) Under the catheter (catheter with check) second clean hole (measuring sediment) pouring of concrete (concrete quality control) pile driver shift.
3, the construction supervision of the preparatory stage (pre-control)
Design Details prior control, including the total package management system review unit, sub-unit qualification review (sub-foundations), construction design approval, mechanical equipment control, personnel control, site layout inspection, material quality control, measurement Management review, approval and start to make the first site meeting. Specific requirements are as follows:
Design Details: Check the validity of the construction drawings; supervise general, read the plan put forward the views of the sub-units; read map views of the Commissioner in writing; to participate and to sign Design Details will be recognized.
Unit management system review of the total package: including a review of total quality management package unit system, a technology management system, quality assurance system and security system needs to check its organizational structure, management system, personnel appointment card.
Sub-unit qualification examination: check sub-unit "business license", "Building professional qualifications", etc., as well as managers and operators work license; "subcontractors eligible to apply for the trial table," Supervision for approval.
Construction organization design approval: According to a project, from "man, machine, material, method," the elements begin to review the construction organization design on the quality, progress, security, construction and other aspects of civilized people, organizations, systems, measures and so is perfect; check total, sub-unit approval procedures are complete; review the construction sequence and the detection means; written approval of the views of supervision.
Control machinery and equipment: Equipment type, quantity should be in line with the Construction Design; check the maintenance records, certification, operation card.
Site layout check: should be rational distribution, consistent with the construction organization design; water, electricity, transport, hard floor shall meet the construction requirements; the same time start the inspection check.
Quality control materials: steel, welding quality and shall be complete, steel witness sample retest; review Shangpin Tong mix station quality (Shangpin Tong Zhunyong Zheng, business license, laboratory qualification), stir-site visits; and witness delivery inspection and review materials to.
