Shield tunnel grouting layer performance detection method
A detection method and technology for shield tunneling, applied in the field of building science, can solve the problem that the quality of grouting cannot be detected, and achieve the effect of accurate determination
Active Publication Date: 2015-07-15
SHANGHAI JIANKE ENG CONSULTING
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Problems solved by technology
[0005] The purpose of the present invention is to provide a shield tunnel grouting layer performance detection method for the technical defect that the grouting quality of the construction gap between the shield shell and the tunnel segment cannot be detected during the working process of the existing shield machine , using the method of drilling cores in the reserved grouting holes of the segment to implement the detection of samples drilled from the grouting layer of the shield tunnel, so as to realize the detection of the state of the grouting layer of the shield tunnel and ensure the grouting layer of the shield tunnel Meet the design requirements
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[0026] as attached Figure 1~4 As shown, a shield tunnel grouting layer performance testing method is characterized in that it includes the following steps:
[0027] First, unscrew the bulkhead of the reserved grouting hole in the tunnel segment;
[0028] Next, install the first ball valve at the reserved grouting hole of the segment, the inner diameter of the ball valve is 40mm
[0029] Then, position the drilling rig, and install the drill bit and drill pipe on the drilling rig;
[0030] The fourth step is to pass the drill bit and drill pipe through the first ball valve, drill through the grouting hole into the grouting layer, and then extend into the soil layer around the tunnel. The drill bit extends into the soil layer 100mm;
[0031] The fifth step is to pull out the drill bit from the drill hole, take out the core sample, and put it into the sample cylinder;
[0032] as attached Figure 5 As shown, finally, the grouting core pipe is passed through the ball first va...
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The invention discloses a shield tunnel grouting layer performance detection method. The method comprises the following steps that firstly, a first ball valve is installed at a reserved grouting hole of a tunnel pipe piece, then a drill is positioned, and a drill bit and a drill rod are installed on the drill; the drill bit and the drill rod pass through the first ball valve, penetrate through the grouting hole, drill in the grouting layer, and continuously drill in the peripheral soil layer of a tunnel; the drill bit is taken out, and core samples are taken out and put into a sample cylinder; finally a grouting core pipe penetrates through the first ball valve and is inserted in a drill hole, and grouting, filling and blocking are conducted on the gap of the drilling position. According to the shield tunnel grouting layer performance detection method, the mode of drilling and taking out the core is used for achieving detection on samples extracted from the shield tunnel grouting layer, the detection to the shield tunnel grouting effect is achieved, and the purpose that a shield tunnel grouting layer reaches design requirements is ensured.
Description
technical field [0001] The invention belongs to the field of building science and technology, and specifically relates to a method for testing the performance of the grouting layer of a shield tunnel. The detection of the grouting effect of the shield tunnel ensures that the grouting layer of the shield tunnel meets the design requirements. Background technique [0002] With the advancement of science and technology, the excavation of large tunnels and the rapid development of tunnel construction technology, from the original manual excavation, to the development of excavation with explosives, to the current excavation with professional shield machines. Shield tunnel boring machine, referred to as shield machine, is a kind of special engineering machinery for tunnel boring. Modern shield tunnel boring machine integrates light, mechanics, electricity, hydraulics, sensing and information technology. It has the functions of excavating and cutting soil, Functions such as convey...
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IPC IPC(8): E21D9/00
Inventor 蔡来炳周红波缪佳敏
Owner SHANGHAI JIANKE ENG CONSULTING