Apparatus for testing watertightness of shield tunnel elastic sealing gasket in conditions with different bench staggering quantities
A technology of elastic sealing gasket and inspection device, which is applied in the direction of using liquid/vacuum degree for liquid tightness measurement, etc., to achieve the effect of simple equipment, convenient operation and small molding workload
Active Publication Date: 2015-12-16
NANJING HYDRAULIC RES INST
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However, the above test method only simulates the sealing effect when the elastic gasket is attached to the cover plate, and there is a certain difference from the sealing effect when the elastic gasket is attached to the concrete in actual working conditions.
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[0017] Hereinafter, the present invention will be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the present invention are marked. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
[0018] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" may be used herein to describe the relationship of one element or feature relative to another element or feature shown in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, e...
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The invention discloses an apparatus for testing watertightness of a shield tunnel elastic sealing gasket in conditions with different bench staggering quantities. The testing apparatus comprises a rigid rib-equipped plate and four rigid flats. The rigid rib-equipped plate is composed of a main plate and a pair of rib plates. The rib plates are respectively arranged on the two sides of the main plate waist part in a staggered way. The rib plate staggering quantity is the bench staggering quantity of the elastic sealing gasket. The bench staggering quantity ranges from 1 mm to 14 mm. The apparatus for testing watertightness of the shield tunnel elastic sealing gasket in conditions with different bench staggering quantities overcomes the limits in a conventional test method that penetration performance of only the elastic sealing gasket and steel template contacting face is investigated. The apparatus which can have tests and researches performed for the penetration performance of the elastic sealing gasket and concrete contacting face better simulates the boundary conditions of the sealing gasket in real projects and achieves more objective and reasonable evaluating indexes. Furthermore, the testing apparatus can be used in a way to match a currently widely used common concrete anti-permeability instrument. The processing cost is further lowered.
Description
technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a testing device for testing the watertightness of a shield tunnel elastic gasket directly bonded to concrete at different offsets. Background technique [0002] During shield tunneling construction and subsequent settlement, the longitudinal displacement between concrete segments is called staggering. In the construction of shield tunnels, many factors such as segment size errors, uneven top force during assembly, and differences in surrounding soil layers will cause misalignment, which will bring hidden dangers to the waterproofing and safe operation of the project. [0003] At present, domestic scholars basically use steel grooves instead of concrete grooves to carry out research on the waterproof performance of shield tunnel elastic gaskets, and the boundary and friction conditions of the gaskets are difficult to meet. The current national standard "Polymer Wate...
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IPC IPC(8): G01M3/02
Inventor 陆采荣刘伟宝梅国兴王珩戈雪良杨虎
Owner NANJING HYDRAULIC RES INST