Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Large-diameter super-thick pebble bed hole forming method

A pebble layer, large-diameter technology, applied in the field of large-diameter ultra-thick pebble layer hole formation, can solve the problem of slowness

Inactive Publication Date: 2017-10-10
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 1ST ENG
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after entering the rock, especially when the depth of the rock is deep, the drilling construction with percussion drilling is relatively slow.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Large-diameter super-thick pebble bed hole forming method
  • Large-diameter super-thick pebble bed hole forming method
  • Large-diameter super-thick pebble bed hole forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The specific implementation manner of the present invention will be described below with reference to the accompanying drawings. Such as Figure 1 to Figure 6 Shown: a method for forming holes in a large-diameter ultra-thick pebble layer, carried out in accordance with the following steps:

[0018] First of all, the preparations before construction are carried out. After the site is leveled, the measurement and stakeout are carried out to determine the hole position, and the outer casing is buried, and the percussion drill is accurately positioned;

[0019] Then use the percussion drill in the outer casing to carry out construction. During the drilling process, maintain the guiding effect of the weight to ensure the verticality of the hole. During the process, control the specific gravity of the mud. If the mud is lost or lost, it should be supplemented. And according to the mud inspection regulations, the mud index should be checked on time. In case of changes in the ...

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

The invention discloses a large-diameter super-thick pebble bed hole forming method. The large-diameter super-thick pebble bed hole forming method is characterized by comprising the following steps that a construction site is leveled firstly, a foundation is compacted, lofting and outer protection cylinder burying are carried out, construction in an outer protection cylinder is carried out through an impact drill, after the impact drill enters a pebble covering layer, the impact drill penetrates the pebble covering layer and enters the rock and then stops drilling, an inner protection cylinder is lowered in the drilled hole, and a rotary drilling rig is used for drilling in the inner protection cylinder until a hole is formed. The large-diameter super-thick pebble bed hole forming method is high in hole forming efficiency, stable in hole wall, capable of shortening the working period and high in flexibility.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a method for forming holes in large-diameter and ultra-thick pebble layers. Background technique [0002] Percussion drill and rotary drill are two kinds of construction equipment commonly used in bridge pile foundation construction. Simply using percussion drill or rotary drill to drill holes, there are relatively large holes in the construction of end-bearing piles that pass through the pebble cover layer and penetrate deep into the rock. Due to the high permeability coefficient and poor stability of the pebble layer, hole collapse is very easy to occur, so it is difficult to drill holes directly by rotary drilling; while the effect of percussion drilling is better. However, after entering the rock, especially when the depth of entering the rock is relatively deep, the drilling construction using percussion drilling is relatively slow. Therefore need a kind of method that ca...

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 Applications(China)
IPC IPC(8): E02D5/38E21B1/00E21B3/00
CPCE02D5/38E02D2250/0023E21B1/00E21B3/00
Inventor 高明慧张久超曹绍渤刘长海高学文
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 1ST ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com