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A platform for research: civil engineering, architecture and urbanism
Downcomer well temporary lengthening method
The invention relates to foundation pit construction, and especially relates to a downcomer well temporary lengthening method. The downcomer well temporary lengthening method comprises: step 1, manufacturing a cross hanging bracket according to dimensions of a downcomer well; step 2, performing pipeline sinking of a downcomer well, when a downcomer steel tube is lowered to proper height, uniformly welding four hanging bars extending on the downcomer steel tube on the downcomer steel tube; step 3, taking a UPVC double-well corrugated pipe whose pipe diameter is one size larger than that of the downcomer steel tube, sleeving the UPVC double-well corrugated pipe on the downcomer steel tube, sealing the downcomer steel tube and making the hanging bars distributed on the periphery of the UPVC double-well corrugated pipe; step 4, continuously performing pipeline sinking of the downcomer well until the downcomer is lowered to a preset position, welding the hanging bracket manufactured in the step 1 with the four hanging bars on the highest point of the tube well; step 5, operating sanding filling and well flushing; after dewatering is completed, excavating earth, and dismounting a hanging bar support and the hanging bars with the sequence and progress of earth excavation, when earth is excavated to a first bearing surface, using a hacksaw to cut and dismount the PVC double-well corrugated pipe which extends out of the surface of a foundation pit. The downcomer well is convenient to cut off, and simple in technology and cheap in price.
Downcomer well temporary lengthening method
The invention relates to foundation pit construction, and especially relates to a downcomer well temporary lengthening method. The downcomer well temporary lengthening method comprises: step 1, manufacturing a cross hanging bracket according to dimensions of a downcomer well; step 2, performing pipeline sinking of a downcomer well, when a downcomer steel tube is lowered to proper height, uniformly welding four hanging bars extending on the downcomer steel tube on the downcomer steel tube; step 3, taking a UPVC double-well corrugated pipe whose pipe diameter is one size larger than that of the downcomer steel tube, sleeving the UPVC double-well corrugated pipe on the downcomer steel tube, sealing the downcomer steel tube and making the hanging bars distributed on the periphery of the UPVC double-well corrugated pipe; step 4, continuously performing pipeline sinking of the downcomer well until the downcomer is lowered to a preset position, welding the hanging bracket manufactured in the step 1 with the four hanging bars on the highest point of the tube well; step 5, operating sanding filling and well flushing; after dewatering is completed, excavating earth, and dismounting a hanging bar support and the hanging bars with the sequence and progress of earth excavation, when earth is excavated to a first bearing surface, using a hacksaw to cut and dismount the PVC double-well corrugated pipe which extends out of the surface of a foundation pit. The downcomer well is convenient to cut off, and simple in technology and cheap in price.
Downcomer well temporary lengthening method
YANG QIAN (author) / WEI HONGCHAO (author) / DAI JINGYAN (author)
2015-12-23
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
Culvert lengthening structure and lengthening method thereof
| European Patent Office | 2024
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