the permanent ship lock of three gorges construction excavation and support of quality control分析Word下载.docx

1、 Abstract: The permanent ship lock of Three Gorges ship lock for two-five consecutive total length of 6 442 m, one of the main section 1 637 m. Excavation of two phases: an excavation of a large area excavation to expose the top and South, the North Slope Excavation; two are mainly for the excavatio

2、n of the main segment lock slot cut excavation. Support construction, including slope, chamber wall, supporting, mainly Anchor, anchor, spray concrete and other support method. Supervision by taking control of dynamic control and key combination of pre-pre-control, process monitoring and post-inspec

3、tion method of combining pairs of on-site construction quality control. Keywords: Three Gorges ship lock construction supervision of excavation and support 1 Project Overview 1.1 The size of the project Layout of the permanent ship lock of Three Gorges Project on the north side of the dam on the lef

4、t bank Tanzi Ling, for five consecutive two-lock, length of 6 442 m, in which the upstream approach channel length 2 113 m, the downstream approach channel 2 722 m, lock the main section of 1 637 m The total head 113.0 m, single-stage chamber maximum working head 45.2 m, the effective chamber size o

5、f 280 m 34 m 5 m （length width threshold on the depth）, designed annual capacity of one-way shipping for 5 0 million t , Department of the Three Gorges Project the main navigation structure. Excavation and anchor retaining the amount of major projects: The total excavation quantity is 4 1.45 million

6、 m3, of which an excavation quantities 1 8 million m3, two excavation quantity 2345 Wan m3; anchor 4182 beam, high-strength bolt 98 715. 1.2 Excavation of The permanent ship lock excavation and anchor support construction in two phases, a large-scale excavation of the main gate to the top over the t

7、op excavation and slope excavation to expose a maximum slope height is 170 m, to ensure the slope in the construction and subsequent operation during the security and stability, Nai Shi 1 excavation and construction of the key anchor; 2 excavated in a project based on the chamber into the tank excav

8、ation, maximum depth of 68 m. 1.3 anchor support construction An anchor support construction in order to maintain the stability of the high slope for the purpose of the system on the slope, anchor reinforcement, the surface of sprayed concrete hanging net closed; two concentrated in the gate slot su

9、pporting vertical wall, the main sub-anchor, anchor sprayed concrete and other types of support method. Anchor systems can be classified according to the nature of the role of anchor and random anchor, according to bond into a cohesive manner and non-bonded anchor anchor, according to supporting the

10、 form is divided into the first anchor and the right to wear side anchor, according to load size is divided into 1 000 kN, and 3 000 kN-class Anchor design according to different positions, block the size of the different anchor reinforcement approach. Bolt also subsystems and random anchor bolt two

11、 categories, the system is divided into ordinary bolt anchor according to material, high strength bolt （ grade steel） two kinds. High-strength bolt by the force of a single 450 kN, is the anchoring of the important and difficult, both played on the rock anchor role, but also to the lining wall of co

12、ncrete hanging from branches supporting the role of the permanent ship lock is considered the “lifeline” projects. Two on-site quality control 2.1 Quality control methods Supervision of engineering and process modules, process-based quality programs in engineering-oriented, quantitative, and the who

13、le process of total quality control, concrete can be summarized as “three-three” system of control measures, known as “three stage” control, “ 3 inspection system “control,” three-level “control. 2.1.1 “Three stage” Control of “Three-stage” control means “pre-control”, “programmed” and “end control.

14、” 1） “pre-control” as the ex ante control is “active control” of the main contents, supervision of construction by qualified contractors to review the organization of the construction schedule and construction technical measures for approval, inspection contractors to quality assurance system, techn

15、ical measures really implemented, and organizational design tests, be of technical problems. Supervision of internal organization to emphasize the implementation and personnel in place, and the preparation of the corresponding operating procedures and supervision of the implementation of rules to regulate the on-site supervision of behavior, the measures have been implemented only in cases where only allowed to officially start the construction and sign the order. 2） “programmed” that the const