Method for assembling deep tunnel shield whole-ring test segment
A technology of segment assembly and deep tunnel shield, applied in tunnels, tunnel linings, shaft equipment, etc., can solve the problems of difficult rubber strips to be compressed into grooves, unable to maintain the stability of the load direction and the accuracy of load size, etc., to improve quality and The effect of efficiency
Active Publication Date: 2019-04-26
SHANGHAI FOUND ENG GRP
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Problems solved by technology
However, when the test device adopts the horizontal arrangement of segments, when testing multi-ring combined assembled segments, especially tunnel segments with staggered seam design, affected by the ring-shaped sealing rubber strip, the gaps between segments can be tightened with a single pass. It is difficult to compress the rubber strips into the grooves to form a tightly closed segment ring with the method of fixing the connecting bolts of the segments. The full-scale test of the shield tunnel cannot maintain the stability of the load direction and the accuracy of the load magnitude under this condition. sex
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[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0032] A combined multi-ring shield segment assembling method for horizontal arrangement test provided by the present invention comprises the following steps (horizontal test device for 1:1 mechanical simulation test of deep tunnel combined multi-ring shield designed with staggered joints) and segment assembly method as an example):
[0033] 1. Lay (30mm) thick steel plates on the selected floor to increase the bearing and flatness of the floor throughout the test.
[0034] 2. On the laid steel plate, use measuring instruments to mark the installation centerline and sideline of the inner and outer rings of the test frame;
[0035] 3. On the laid steel plate, mark the theoretical center line of the base of the segment test piece with a measuring instrument such as a gathering station, and protrude the structural size of the segment after pasting the wat...
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The invention relates to a method for assembling a deep tunnel shield whole-ring test segment. The method comprises the following steps that 1, the test segment is assembled, and test equipment is arranged; 2, a segment test piece is initially assembled, specifically, firstly, the segment test piece with water-stop rubber pasted properly is flatly placed and turned over to the side direction to bevertical through a crane, in the segment assembling process, construction is carried out according to drawings according to the test requirement, a ring body at the bottommost part of a whole ring isan initial assembly ring body, a ring body in the middle of the whole ring is a secondary assembly ring body, and a ring body at the uppermost part of the whole ring is a final assembly ring body; and 3, after the test piece segment is initially assembled, adjustment is carried out, specifically, fastening is carried out according to the design torque requirement, after longitudinal bolts are fastened, the ring bodies are fastened according to the design torque requirement, and finally overall fastening meets the design torque requirement. According to the method for assembling the deep tunnel shield whole-ring test segment, the mounting quality and efficiency of a combined multi-ring shield segment, especially a staggered-joint segment can be improved.
Description
technical field [0001] The invention relates to a test method for a shield test segment in tunnel engineering, in particular to a segment installation method for a mechanical simulation test of a shield segment. Background technique [0002] With the development of the urban underground pipeline network, the diameter and buried depth of the shield tunnel are getting deeper and deeper. Under different geological conditions during construction or service, when encountering changes in construction load or the bearing capacity of the structure itself, Segments will undergo different load transition phenomena. [0003] For the purpose of maintaining the structural safety of the shield tunnel and prolonging its service life, the load change process of the shield tunnel is accurately simulated, and the regularity of the comprehensive mechanical properties of the segment structure is studied. The mechanical test method using 1:1 real structural segments can best simulate the actual...
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IPC IPC(8): E21D11/08E21D11/40
CPCE21D11/083E21D11/40
Inventor 顾解桢朱德勇陆正李峰
Owner SHANGHAI FOUND ENG GRP