Sequential and segmented grouting device for tunnel grouting model test and its application method
A technology of segmented grouting and grouting model, which is applied to tunnels, tunnel linings, shaft equipment, etc., can solve the problems of hindering the deformation of surrounding rock and affecting the experimental results of tunnel excavation, and achieves low cost, simple structure and convenient assembly. Effect
Active Publication Date: 2016-01-13
SHANDONG UNIV
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Problems solved by technology
Current grouting pipe layout methods cannot meet this requirement
If the layout method of pre-embedded hard grouting pipes before tunnel excavation is adopted, the hard grouting pipes can bear part of the surrounding rock stress during tunnel excavation, hinder the deformation of surrounding rocks, and seriously affect the results of tunnel excavation experiments
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[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0040] like Figure 1-Figure 8As shown, the sequenced and segmented grouting device suitable for tunnel grouting model test includes 4 segmented grouting devices. The segmented grouting device consists of PVC grouting pipe 2, grouting divider 7, grouting The hose 13 and other PVC components (such as PVC elbow 3\PVC tee 4) are formed, and all PVC components are connected with PVC adhesive. One pair of segmented grouters is used for surrounding rock grouting reinforcement area 19 after tunnel excavation, and the other pair of segmented grouters is used for advanced curtain grouting reinforcement area 20 before tunnel excavation. Two grouting dividers 7 and three grouting hoses 13 are arranged inside each segmented grouter. The segmented grouting device is connected with the steel wire pipe 11 through the PVC collar 6, and the steel wire pipe 11 passes t...
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The invention discloses a tunnel grouting model test sequential segmented grouting device. The tunnel grouting model test sequential segmented grouting device comprises two pairs of segmented grouting devices which are arranged in a front and rear mode, wherein one pair of the segmented grouting devices corresponds to a surrounding rock grouting reinforcement area after the excavation of the tunnel, and the other pair of the segmented grouting devices corresponds to an advanced curtain grouting reinforcement area before the excavation of the tunnel; each segmented grouting device comprises a vertical grouting pipe, the grouting pipe is connected with three grouting hoses which correspond to the surrounding rock grouting reinforcement area after the excavation of the tunnel or the advanced curtain grouting reinforcement area before the excavation of the tunnel respectively in parallel, a grouting divider is arranged in the grouting pipe between every two grouting hoses, and an inlet of the grouting pipe is connected with a grouting pump. The invention further discloses a using method of the device. According to the tunnel grouting model test sequential segmented grouting device and the using method thereof, surrounding rock grouting reinforcement after the excavation of the tunnel and advanced curtain grouting reinforcement can be achieved, even grouting reinforcement of the tunnel surrounding rock can be achieved with basically no influence on the surrounding rock stress, cost is low, and construction is simple.
Description
technical field [0001] The invention relates to a grouting model test technology, in particular to a sequential and segmented grouting device for a tunnel grouting model test and a use method thereof. Background technique [0002] At present, when tunnels are excavated in weak water-rich strata, problems such as excessive deformation of surrounding rocks and large water seepage often occur, and even water and mud inrush accidents may occur. At present, the grouting method is mainly used to reinforce the weak water-rich surrounding rock of the tunnel so that the tunnel can pass through the formation smoothly. Tunnel grouting model test can study the diffusion law of grouting fluid in the surrounding rock of the tunnel, analyze the effect of grouting reinforcement and the stability of rock mass reinforced by grouting, which is a new topic and research direction in tunnel safety construction. The tunnel grouting model test, especially the curtain grouting model test, is limite...
Claims
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IPC IPC(8): E21D11/10
Inventor 张连震李术才李体兵李拉普翁贤杰王德明李相辉赵鹏
Owner SHANDONG UNIV