The Construction Method of Reinforcing the Frozen Communication Channel with Grouting and Frozen Pipes and Restraining Frost Heave and Thawing Settlement
A communication channel and construction method technology, which is applied in basic structure engineering, soil protection, construction, etc., can solve the problems of uneven settlement of soft soil layered channel and tunnel structure, insufficient grouting, and untimely grouting, so as to save The amount of cement used, the enhancement of anti-seepage and self-stabilization ability, and the effect of controlling groundwater seepage
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Embodiment 1
[0036] Embodiment 1: A kind of grouting freezing pipe
[0037] A subway connection channel in Ningbo, where the geology is from top to bottom, consists of plain fill, silt layer, and silty clay layer. The stratum that the shield tunnels through is mainly silty clay layer. The burial depth of the communication channel is 27.6m, and the reinforcement project adopts the joint reinforcement of cement and soil reinforcement + horizontal freezing method. According to the design requirements, the reinforcement depth of the communication channel is 8.5m.
[0038] 1. A grouting freezing pipe with a length of 8.5m, characterized in that the grouting freezing pipe is composed of a grouting pipe I and a liquid supply pipe II, wherein the grouting pipe I consists of 6 sections, and the end of the first section is installed There is a drill bit III, and a one-way valve IV is arranged on both sides of the pipe body; the liquid supply pipe II is made by cross-welding two steel pipes.
[003...
Embodiment 2
[0041] Embodiment 2: A kind of grouting freezing pipe
[0042] A connecting channel of Suzhou Metro Line 3, the geology of the site is plain fill from top to bottom, silty clay layer, silt-sand interlayer, and silt-fine sand. The stratum traversed by shield tunneling is mainly silt fine sand layer. The communication channel is buried at a depth of 15.2m, and the reinforcement project adopts cement-soil reinforcement + horizontal freezing method for joint reinforcement. According to the design requirements, the reinforcement depth of the communication channel is 4m.
[0043] A grouting freezing pipe with a length of 4m, which is characterized in that the grouting freezing pipe is composed of a grouting pipe I and a liquid supply pipe II, wherein the grouting pipe I is composed of three sections, and the end of the first section is equipped with a drill bit Ⅲ, a one-way valve Ⅳ is arranged on both sides of the pipe body; the liquid supply pipe Ⅱ is made by cross-welding two st...
Embodiment 3
[0046] Embodiment 3: A kind of grouting freezing pipe
[0047] The geology of a communication channel in Ningbo Metro is plain fill, silty clay layer, and silty fine sand layer from top to bottom. The stratum traversed by shield tunneling is mainly silt fine sand layer. The communication channel is buried at a depth of 21.8m, and the reinforcement project adopts cement-soil reinforcement + horizontal freezing method for joint reinforcement. According to the design requirements, the reinforcement depth of the communication channel is 7m.
[0048] A grouting freezing pipe with a length of 7m, which is characterized in that the grouting freezing pipe is composed of a grouting pipe I and a liquid supply pipe II, wherein the grouting pipe I is composed of 5 sections, and the end of the first section is equipped with a drill bit Ⅲ, a one-way valve Ⅳ is arranged on both sides of the pipe body; the liquid supply pipe Ⅱ is made by cross-welding two steel pipes.
[0049] 2. The afore...
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