Drilling pretreatment method for cast-in-place pile on block-stone-containing silty soil foundation

A technology of sand foundation and cast-in-situ piles, which is applied to drilling equipment and methods, earthwork drilling, sheet pile walls, etc., can solve the problems of increasing construction period and construction cost, difficulty in ensuring project quality, prolonging working hours, etc., and achieve improvement The effect of project quality and progress, reducing hole collapse, and speeding up the construction process

Inactive Publication Date: 2018-02-16
ZHEJIANG JIANGNANCHUN CONSTR GRP
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous solution was often to extend the working hours and increase the project investment under the condition of the existing equip

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
  • Drilling pretreatment method for cast-in-place pile on block-stone-containing silty soil foundation
  • Drilling pretreatment method for cast-in-place pile on block-stone-containing silty soil foundation
  • Drilling pretreatment method for cast-in-place pile on block-stone-containing silty soil foundation

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] like Figure 1 to Figure 5 As shown, the present invention is a method for pretreatment of bored piles in silt soil foundation containing lumpy rock, comprising the following steps:

[0036] (1) Soil investigation:

[0037] After measuring and staking out, draw the floor plan of the construction site and arrange the drilling positions; collect 100g soil samples at each drilling position, place them in a sealed bag after drying, and investigate the soil quality of each soil sample to detect its composition, strength and hardness. and other parameters, record the survey data, and determine the structural parameters of the steel casing 1 according to the survey data;

[0038] The soil quality survey process is used to detect the soil quality of the drilling position, so that the workers can understand the soil structure and properties, so that the workers can be equipped with corresponding equipment, tools and other construction preparations according to the soil quality ...

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

PropertyMeasurementUnit
Depthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a drilling pretreatment method for a cast-in-place pile on a block-stone-containing silty soil foundation. Through the vibration principle of a vibration hammer, the vibrationhammer generates high-speed vibration together with a steel casing to enable soil around the pile wall to generate the liquefaction effect, and accordingly the friction resistance of the pile wall isreduced; through vibration force and the weight of a hammer body and the steel casing, the steel casing can penetrates through a soil layer to the designed position, so that the steel casing is driveninto the bottom of an underground block stone layer; block stone and soil masses in the steel casing are grabbed out through the impact and grabbing effects of an impact-grabbing drill; and the steelcasing is backfilled with earthwork and pulled out, and finally an abrasion drill can continue to be used to conduct normal construction of the drilled cast-in-place pile. According to the drilling pretreatment method, obstruction of the block stone to drilling construction is eliminated, construction difficulty is lowered, the construction time is shortened, the construction cost is reduced, andthe construction quality can be guaranteed.

Description

technical field [0001] The invention relates to a drilling pretreatment method, in particular to a method for drilling pretreatment of cast-in-place piles in silty soil foundations containing block stones. Background technique [0002] Water conservancy and hydropower projects, sluice pump stations and other structural buildings are generally constructed at river embankments, and most of them use bored piles for foundation treatment. Under the ground, it is inevitable to encounter block stone layers that were used for anti-scouring reinforcement many years ago. After the burial depth of the block stone layer is relatively large (even up to 12 meters), problems such as difficulty in drilling and hole collapse will inevitably occur. The previous solution was often to extend the working hours and increase the project investment under the condition of the existing equipment, which not only increased the construction period and construction cost, but also made it difficult to gua...

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
IPC IPC(8): E21B7/20E02D5/38E02D5/60
CPCE21B7/20E02D5/38E02D5/60
Inventor 宋翔覃南杨志军王夏勋狄建刚龚曙光
Owner ZHEJIANG JIANGNANCHUN CONSTR GRP
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