Rotary-digging combined pile-forming construction method in complicated geological conditions

A technology with complex geological conditions and construction methods, applied in the field of foundation construction, can solve the problems that the piling process cannot be applied to cities, cannot be arranged in mud pools, and the geological conditions are complicated, and achieve stable and reliable pile quality, strong stratum adaptability, The effect of piling shape rules

Inactive Publication Date: 2012-08-22
CHINA CONSTR SECOND ENG BUREAU LTD
View PDF5 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1. In pile foundation projects in urban areas under the geological conditions of gravel-containing sand layer, boulder-containing layer, and high groundwater level, the conventional mud retaining wall rotary digging hole-forming process is easy to expand holes in the gravel-sand layer. The boulder-containing layer will encounter boulders and cannot be drilled into the hole; 2. The conventional mud retaining wall rotary digging process requires mud, and there is no mud preparation and storage site for the pile foundation project in the urban area with a small site (site Mud pools cannot be arranged on the site of pile foundation engineering in narrow urban areas)
[0003] That is to say, with the construction and development of the city, the construction site in the urban area is becoming narrower and narrower, and the geological conditions have become more complex after artificial transformation. In addition, the requirements for environmental protection and civilized construction are becoming more and more High, so the conventional pile-forming process is often not suitable for complex geological engineering in the city

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
  • Rotary-digging combined pile-forming construction method in complicated geological conditions
  • Rotary-digging combined pile-forming construction method in complicated geological conditions
  • Rotary-digging combined pile-forming construction method in complicated geological conditions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment one sees Figure 1-9 As shown, the construction method of rotary excavation combined with piles under complex geological conditions, the construction steps are as follows.

[0041] Step 1. Pile foundation positioning; in this embodiment, the cross positioning method is used for pile foundation positioning. Before the drilling rig is in place, gravel should be filled and compacted around the pile position to ensure that the drilling rig does not fall during the drilling process. Sink and tilt, and then adjust the drill bit and drill pipe through the automatic control device of the drilling rig, so that they can be accurately aligned with the cross line, and the inclination of the drill pipe is less than 1%.

[0042] Step 2: Use the distance intersection method to locate the steel casing. The cross line center method is a conventional method for embedding and checking the casing. This method is intuitive, but lacks process control during the embedding process. T...

Embodiment 2

[0054] Embodiment two see Figure 10-18 As shown, the construction method of rotary excavation combined with piles under complex geological conditions, the construction steps are as follows.

[0055] Step one, pile foundation positioning. In this embodiment, the cross positioning method is used for the positioning of the pile foundation. Before the drilling rig is in place, gravel should be filled and compacted around the pile to ensure that the drilling rig does not sink or tilt during the drilling process. The automatic adjustment device is used to adjust the drill bit and the drill pipe so that they are precisely aligned with the crosshairs, and the inclination of the drill pipe is less than 1%.

[0056] Step 2: Use the distance intersection method to locate the steel casing. The cross line center method is a conventional method for embedding and checking the casing. This method is intuitive, but lacks process control during the embedding process. The present invention ad...

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 provides a rotary-digging combined pile-forming construction method in complicated geological conditions. The method comprising the following steps of: firstly, positioning a pile foundation; secondly, positioning a steel protecting barrel; thirdly, sinking the steel protecting barrel; fourthly, when the steel protecting barrel penetrates through a boulder layer without encountering the boulder, sinking the steel protecting barrel to the design elevation by using a vibration hammer; fifthly, starting a rotary digging and drilling machine to perform rotary digging and drilling at the inner side of the steel protecting barrel; sixthly, hoisting an impacting and catching hammer by a hoist, and downwards hammering and impacting the boulder by the impacting and catching hammer; seventhly, starting the rotary digging and drilling machine to continuously perform rotary digging and drilling to the design elevation; eighthly, fishing slag from the bottom of a hole; ninthly, checking and accepting a final hole; tenthly, aligning the skeleton of a steel reinforcement cage to the opening of the hole and slowly hoisting into the hole by the hoist; eleventhly, secondly cleaning the bottom; twelfthly, concreting; and thirteenthly, after primarily setting the concrete, lifting up the steel protecting barrel by the hoist. The method has the advantages of high safety and reliability, strong stratum adaptability and high construction progress and is suitable for the pile foundation engineering in cities with complicated geological conditions.

Description

technical field [0001] The invention relates to a foundation construction method, in particular to a pile foundation construction method. Background technique [0002] In the pile foundation engineering in urban areas with narrow sites, high environmental protection requirements, and complex geology, the foundation construction will encounter the following problems. 1. In pile foundation projects in urban areas under the geological conditions of gravel-containing sand layer, boulder-containing layer, and high groundwater level, the conventional mud retaining wall rotary digging hole-forming process is easy to expand holes in the gravel-sand layer. The boulder-containing layer will encounter boulders and cannot be drilled into the hole; 2. The conventional mud retaining wall rotary digging process requires mud, and there is no mud preparation and storage site for the pile foundation project in the urban area with a small site (site Mud pools cannot be arranged on the site of...

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): E02D5/38
Inventor 刘建钊史魏张满江红王全逵
Owner CHINA CONSTR SECOND ENG BUREAU LTD
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