www.heavensgatel2.fora.pl

[nlwxpearo]

Safety testing of gate


, Beyond the reinforced protection of various thickness, and there is the phenomenon of exposed tendons; gate concrete most of the average density of 2400kg / m or more, the average strength of the structure recognized by most of the range to meet the specification; small component intensity is generally low, and some have less than 15MPa; individual concrete material adverse phenomenon is mainly the consequence of poor construction quality. (3) Analysis of the structural cracks, the water quality of some of the major differences and long-term existence of concrete under dynamic loads such as large cracks appeared in the off; due to severe surface corrosion of reinforced concrete carbonation appears Cracks. Underwater part of the main side walls and wing walls lock often hit by ships of large tonnage, the root of many positions on the wall of varying degrees of fracture phenomena, or even result in structural stability and strength decreased. (4) analysis of the forces from the structure, thin and thin lock sluice pier and pier, due to open and close the gate during high lateral collision, or frequently crowded by the collision between ships of large tonnage, and its apparent lack of structural rigidity, a number of years of neglect of the lock gates of the support pier and the small post, but there are hidden dangers. Part of the highway bridge pier gate structure attached to thin, surface damage, there have been many transverse bridge bottom has been designed does not meet the requirements of car tonnage and speed. (5) from the structure of the base case analysis, inside and outside the river sluice stilling basin wing wall base,[link widoczny dla zalogowanych], the phenomenon of local deposits in the society, some form of deposits in the society is not a small pit area, has threatened to gate (bridge) pier and wing wall stability; shiplocks chamber part of the side wall around the base and foundation is the phenomenon measured by deposits in the society, though not the severity and the sluice, but no less gate gate pier and the chamber side wall of the structure and stability; the basis of wing wall of water outside the river the lower part there are different degrees of damage, serious fracture walls are already evident, and tilt. (6) inspection and analysis from the underwater gate, pier (including Stilling) structural joints largely intact; serious water pier foundation deposits in the society have emerged as to the depth of structural joint expansion of the phenomenon, found in the individual Stilling There 'dDamandSafety2003 ・ 5 off cracks; gate (with lock) the door slot and the bottom threshold of serious corrosion and varying degrees of damage; Regulator concrete retaining tanque the good, but outside the existing apron stone masonry river rock by the water go phenomenon. 3.2 parts of metal structures and hoist (1) gate with the design and manufacturing defects, but also because of the impact between the ship, resulting in the overall structure of the gate a greater degree of deformation and damage. Gate opening and closing is not smooth, seal damage the battery, not only affect the overall operation of institutions, mainly to reduce the use of gates and hoist functions. (2) gates, gate slot, the bottom sill and some body rust looks serious,[link widoczny dla zalogowanych], urgent need for maintenance. (3) gate materials, the basic design requirements,[link widoczny dla zalogowanych], but the gate first and second class and the lack of penetration weld Weld widespread phenomenon, the need for timely reinforcement. (4) hydraulic gate hoist system, hoist system, and more obsolete, although the force did not exceed the maximum design range of open and close,[link widoczny dla zalogowanych], but there are obvious differences between the left and right sling large force, holding force instability phenomenon, reflecting the start closing mechanism of intermittent disruption, leakage of the hydraulic cylinder and the oil is not the normal working conditions. (5), hoist pulley, pulley shaft hardness difference between the standard value of the larger part of the pulley groove,[link widoczny dla zalogowanych], the surface of a cylinder piston serious wear and tear; hoist hydraulic oil test results seriously overweight (more than NAS standards) need replaced with new oil; part of the hydraulic cylinder rack severe deformation, has affected the normal work. (6) Sluice gate hoist electrical equipment, there is no secondary control devices generally obsolete, over-age running, circuit aging and lack of grounding resistance phenomenon; some of the equipment was going through the renovation and replacement, ability to automatically monitor and control is still low, lagging behind today's production and operation management of sluice safety needs. 4 Conclusion (1) described in this article \can play an effective role. (2) In this paper, running water gate soft security problems many years later, in the southern coastal areas of China there are representatives in the gate, gate management unit should attract enough attention. (3) the gate security methods and test results, reviewed by the organization to get sluice gate management unit authorities and the affirmation and recognition, the main conclusions of the views have been adopted. Can be expected, in summing up the front gate testing, and further improve the detection technology and service quality, based on the detection method described in this article can also serve other areas of the security gate and associated works testing. ■ Received Date :2002-11-18 Author: Zhou (1952 a), male, East China Investigation and Design Institute of office machinery and steel structure design engineer.