Method and apparatus for triple pipe rotary spray of reinforced concrete pile foundation

A reinforced concrete pile foundation and triple pipe technology, which is applied in sheet pile walls, foundation structure engineering, soil protection, etc., can solve the problems of high cost, low engineering quality, and poor strength of consolidated bodies, so as to reduce engineering costs, Guarantee the quality of the project and shorten the construction period

Inactive Publication Date: 2003-05-28
金怀娄 +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because when the rotary spraying reaches 400-500mm from the ground surface, the soil layer will break into pieces and fall into the pile core to affect the quality of the pile.
Therefore, it is difficult to meet the higher needs of construction projects without improving the jet spraying pile forming process.
In addition, the existing high-pressure rotary spray equipment is difficult to meet the requirements of new economic and technical indicators, and there are the following problems: (1) The seal of the triple tube deflector is only suitable for water pressure below 40Mpa, and cannot meet the high-pressure requirements above 50MPa
(3) The distance between the slurry nozzle and the water-air nozzle is too close (140-150mm), causing the slurry jet to be in the stirring area of ​​the water-air jet, which causes the slurry to be mixed and discharged from the surface by water, air, mud and sand on the one hand. On the one hand, the slurry is diluted by water-air sand (β=0.3-0.6), the strength of the consolidated body formed by low slurry concentration is poor, and the defects of low engineering quality and high cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] The invention is applied in building foundation structure engineering, and uses the method of triple tube rotary spraying reinforced concrete pile foundation, which can form various pile shapes by rotary spraying in various strata, and can expose the top of the pile to the ground surface. In the pile forming process, ordinary drilling rigs are used to make holes, and the hole depth is 1.5M deeper according to the design requirements, and then the triple pipe equipment is lowered to the bottom of the hole. At this time, each equipment is selected according to the specified parameters, the high-pressure pump supplies clean water, the air compressor supplies air, and the mud pump supplies clean water first. In order to expand the bottom diameter, the triple pipe only needs to be rotated without lifting. After about 3-5 minutes, after this section of soil cutting and chip removal, when it is considered that the bottom diameter meets the needs, the triple pipe starts to lift,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A technology for constructing the reinforced concrete pile foundation by three-pipe rotary spray includes drilling, cutting earth body, discharging earth, grouting and additional steps including opening surface earth, setting-up reinforcing bar cage, pouring broken stone as aggregate ,vibrating and curing. Its apparatus features that three pipes are collectively sealed, the inner cavity of water nozzle is composed of conic body and cylindrical body, and the inner cavity of air nozzle consists of conic barrel and cylindrical ring barrel. The grouting nozzle is under the water and air nozzle by a distance of 800-1200mm.

Description

Technical field: [0001] The invention relates to a triple pipe rotary spraying reinforced concrete pile foundation method, which belongs to the technical field of construction engineering foundation treatment and foundation engineering. It is applicable to the construction technology of underground building structures in industrial and civil buildings, public works, bridges and culverts, subways, civil air defense, port engineering, hydraulic engineering and mining engineering. Background technique: [0002] High-pressure rotary jet grouting technology was developed in my country in the early 1970s. Its technical performance has been gradually improved from single pipe, double pipe and triple pipe to meet the increasing needs of foundation treatment in construction projects. However, it is difficult to surpass the scope of foundation treatment on the road of development. It can complete the cutting of the soil, stirring the slurry and obtaining a consolidated body of a sing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/12E02D5/34
Inventor 金怀娄边长裕
Owner 金怀娄
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap