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Detection method of underground continuous wall water seepage
The invention discloses a detection method of underground continuous wall joint water seepage of foundation pits. The detection method comprises the following steps: (1) constructing a sleeve valve pipe in a position 5 to 30cm away from a concrete diaphragm wall joint on the outer side of the concrete diaphragm wall; (2) injecting water into a core pipe in the sleeve valve pipe from bottom to top in stages by using a grout injector, wherein the control time for injecting water in each stage is 5 to 20 minutes; and (3) simultaneously observing the water quality change of a precipitation well in the pit when injecting water, determining the position of the core pipe at the moment if turbidity is generated, determining that the concrete diaphragm wall joint adjacent to the grout injection stage has defects, namely determining that a seepage is formed in the range of the concrete diaphragm wall joint of the position, providing joint seepage data so as to determine a next reinforcing measure. The method is simple and convenient in process and high in construction speed; compared with a foundation pit precipitation test and an electro-osmosis method, the method has the advantages that the cost is relatively low and is beneficial for safely and quickly finding the hidden danger of the underground continuous wall joint seepage and determining the detailed position of the concrete diaphragm wall seepage.
Detection method of underground continuous wall water seepage
The invention discloses a detection method of underground continuous wall joint water seepage of foundation pits. The detection method comprises the following steps: (1) constructing a sleeve valve pipe in a position 5 to 30cm away from a concrete diaphragm wall joint on the outer side of the concrete diaphragm wall; (2) injecting water into a core pipe in the sleeve valve pipe from bottom to top in stages by using a grout injector, wherein the control time for injecting water in each stage is 5 to 20 minutes; and (3) simultaneously observing the water quality change of a precipitation well in the pit when injecting water, determining the position of the core pipe at the moment if turbidity is generated, determining that the concrete diaphragm wall joint adjacent to the grout injection stage has defects, namely determining that a seepage is formed in the range of the concrete diaphragm wall joint of the position, providing joint seepage data so as to determine a next reinforcing measure. The method is simple and convenient in process and high in construction speed; compared with a foundation pit precipitation test and an electro-osmosis method, the method has the advantages that the cost is relatively low and is beneficial for safely and quickly finding the hidden danger of the underground continuous wall joint seepage and determining the detailed position of the concrete diaphragm wall seepage.
Detection method of underground continuous wall water seepage
WANG CHENGGANG (author) / LIU ZE (author) / HE KAIWEI (author)
2015-05-27
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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