Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pretreatment method adopted before subway tunnel being excavated
The invention discloses a pretreatment method adopted before a subway tunnel being excavated. The pretreatment method comprises the steps of determining a tunnel central line on the ground, arranging fixed points along the central line at intervals, detecting and excavating an exploratory trench, avoiding pipelines in the exploratory trench to form a plurality of oblique holes and a plurality of vertical holes at different angles, putting steel bars or steel bar cages equal to the hole depth into the holes after hole forming, meanwhile putting grouting pipes into the holes, firstly filling the oblique holes, meanwhile using an instrument to observe the raising situations of the ground and a building and the like. The pretreatment method has the advantages that 1, the pipelines can be visually found out to avoid pipeline drill breakage, 80% of hole distribution positions can be decreased, and interference to operation on streets can be remarkably reduced; 2, the hidden dangers of street surface upheaval, building damage and pipeline breakage caused by grouting can be avoided; 3, a soil body can be efficiently strengthened, underground water stop can be achieved, and the effects of water burst proofing and small soil body deformation in the tunnel excavation process are achieved; 4, a construction period can be remarkably shortened and is only 30% of a construction period of a large pipe shed method or a small guide pipe method.
Pretreatment method adopted before subway tunnel being excavated
The invention discloses a pretreatment method adopted before a subway tunnel being excavated. The pretreatment method comprises the steps of determining a tunnel central line on the ground, arranging fixed points along the central line at intervals, detecting and excavating an exploratory trench, avoiding pipelines in the exploratory trench to form a plurality of oblique holes and a plurality of vertical holes at different angles, putting steel bars or steel bar cages equal to the hole depth into the holes after hole forming, meanwhile putting grouting pipes into the holes, firstly filling the oblique holes, meanwhile using an instrument to observe the raising situations of the ground and a building and the like. The pretreatment method has the advantages that 1, the pipelines can be visually found out to avoid pipeline drill breakage, 80% of hole distribution positions can be decreased, and interference to operation on streets can be remarkably reduced; 2, the hidden dangers of street surface upheaval, building damage and pipeline breakage caused by grouting can be avoided; 3, a soil body can be efficiently strengthened, underground water stop can be achieved, and the effects of water burst proofing and small soil body deformation in the tunnel excavation process are achieved; 4, a construction period can be remarkably shortened and is only 30% of a construction period of a large pipe shed method or a small guide pipe method.
Pretreatment method adopted before subway tunnel being excavated
DENG JINGSEN (Autor:in) / CHEN XUEYUN (Autor:in)
29.07.2015
Patent
Elektronische Ressource
Englisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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