Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ground foundation treatment construction technology under multi-karst-cave geological conditions
The invention provides a ground foundation treatment construction technology under multi-karst-cave geological conditions. The ground foundation treatment construction technology includes the steps that A, a foundation pit is excavated to the designed elevation; B, foundation pit dewatering is performed until the underground water is under the bottom face of the foundation pit by 20 mm-30 mm; C, cushion layer pouring is performed; D, construction of an anti-floating anchor includes the sub-steps that D1, the layout chart of the anti-floating anchor is made; D2, drilling positioning is performed; D3, an air compression drilling machine is adopted for drilling, a casing is coaxially fixed to a drill rod of the drilling machine, bentonite slurry is injected for wall protection, and when a drill bit, the drill rod and the casing drill into the rock stratum and can not drill further, the casing and the drill rod are separated and fixed, and then pressurization is performed so that the drill bit and the drill rod can drill into the rock stratum by 2 m-3 m; D4, the anti-floating anchor is placed, and a grout injection pipe with the end communicated with a high-pressure grouting pump is bundled to the anti-floating anchor; D5, hole clearing is performed; D6, secondary grout injection is performed after the initial setting strength of primarily-injected grout reaches 5.0 MPa; D7, grout supplementing is performed; D8, an adjacent anti-floating anchor is constructed; E, a raft foundation is constructed. The ground foundation treatment construction technology has the advantages of being high in construction efficiency and good in effect and is quite suitable for the multi-karst-cave geological conditions rich in underground water.
Ground foundation treatment construction technology under multi-karst-cave geological conditions
The invention provides a ground foundation treatment construction technology under multi-karst-cave geological conditions. The ground foundation treatment construction technology includes the steps that A, a foundation pit is excavated to the designed elevation; B, foundation pit dewatering is performed until the underground water is under the bottom face of the foundation pit by 20 mm-30 mm; C, cushion layer pouring is performed; D, construction of an anti-floating anchor includes the sub-steps that D1, the layout chart of the anti-floating anchor is made; D2, drilling positioning is performed; D3, an air compression drilling machine is adopted for drilling, a casing is coaxially fixed to a drill rod of the drilling machine, bentonite slurry is injected for wall protection, and when a drill bit, the drill rod and the casing drill into the rock stratum and can not drill further, the casing and the drill rod are separated and fixed, and then pressurization is performed so that the drill bit and the drill rod can drill into the rock stratum by 2 m-3 m; D4, the anti-floating anchor is placed, and a grout injection pipe with the end communicated with a high-pressure grouting pump is bundled to the anti-floating anchor; D5, hole clearing is performed; D6, secondary grout injection is performed after the initial setting strength of primarily-injected grout reaches 5.0 MPa; D7, grout supplementing is performed; D8, an adjacent anti-floating anchor is constructed; E, a raft foundation is constructed. The ground foundation treatment construction technology has the advantages of being high in construction efficiency and good in effect and is quite suitable for the multi-karst-cave geological conditions rich in underground water.
Ground foundation treatment construction technology under multi-karst-cave geological conditions
LIU LIULIAN (Autor:in) / YAO HAIBO (Autor:in) / LIU JIAMING (Autor:in) / QIU LI (Autor:in) / ZHAO QINGQIANG (Autor:in) / ZHANG FUSEN (Autor:in)
11.11.2015
Patent
Elektronische Ressource
Englisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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