Method for predicting safety of pile body of hammered pile body in granite area

A prediction method and granite technology, applied in the field of infrastructure construction, can solve the problems that prefabricated piles cannot be smoothly driven to the design depth, the pile ends are driven directly above the boulders, and the pile body is damaged, and achieves reasonable design, reliable results, and high reliability. avoid damaging effects

Pending Publication Date: 2022-02-18
FUJIAN UNIV OF TECH +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A certain number of boulders are often distributed in the weathered residual soil area of ​​granite. When hammering piles in this area, the pile tip may be driven directly above the boulders, resulting in the failure of prefabricated piles to be driven to the design depth smoothly.
If the size of the boulder is large, the prefabricated pile cannot sink under the action of hammering force, and the pile body may be damaged
For granite weathering residual soil areas, the safety judgment of prefabricated piles is mostly based on engineering experience, and there is no relevant theoretical method for guidance

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
  • Method for predicting safety of pile body of hammered pile body in granite area
  • Method for predicting safety of pile body of hammered pile body in granite area
  • Method for predicting safety of pile body of hammered pile body in granite area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific examples are given and described in detail as follows.

[0029] A method for predicting the safety of a hammer pile body in a granite area, comprising the following steps:

[0030] Step S1: determine the weight W and the maximum stroke H of the diesel hammer;

[0031] Step S2: Determine the diameter D of the boulder below the prefabricated pile body and the buried depth Z of the top surface;

[0032] Step S3: Determine the radius a of the prefabricated pile and the design value f of the axial compressive strength of the pile concrete c ;

[0033] Step S4: Determine the limit value N of the compressive bearing capacity of the prefabricated pile body u , in, 0.85 is taken as the process coefficient for prefabricated piles; A p is the cross-sectional area of ​​the prefabricated pile, A p = πa 2 ;

[0034] Step S5: Determine the elasti...

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 relates to a method for predicting the safety of a hammered pile body in a granite area, which can predict the safety of the pile body in the granite area and prevent the pile body from being damaged, and is characterized by comprising the following steps of: firstly, determining the weight and the maximum stroke of a diesel hammer, and detecting the diameter and the top surface burial depth of a boulder by a geological radar or cross-hole earthquake CT method; determining the radius of the precast pile, the axial compressive strength design value of pile body concrete, the compressive bearing capacity limit value of the pile body, the elastic modulus and Poisson's ratio of granite residual soil, the shear modulus of the granite residual soil and the instantaneous maximum impact force borne by the top surface of the precast pile; then determining the soil body side frictional resistance borne by a pile body, determining the soil body side frictional resistance borne by the pile body, the dynamic cohesive force of granite residual soil and the weight of the granite residual soil, finally determining the resistance of the soil body at the lower part of the boulder, and judging whether the pile body is damaged or not by comparing the instantaneous maximum impact force with the resistance. The purpose of preventing the pile body from being damaged in advance is achieved.

Description

technical field [0001] The invention relates to the field of infrastructure construction, in particular to a method for predicting the safety of a hammer pile body in a granite area. Background technique [0002] A certain number of boulders are often distributed in the weathered residual soil area of ​​granite. When hammering piles in this area, the pile tip may be driven directly above the boulders, resulting in the failure of the prefabricated pile to be driven to the design depth smoothly. If the size of the boulder is large, the prefabricated pile cannot sink under the action of hammering power, and the pile body may be damaged. For the granite weathered residual soil area, the safety judgment of the prefabricated pile body is mostly based on engineering experience, and there is no relevant theoretical method for guidance. Contents of the invention [0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to...

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): G06Q10/04G06F30/20G01D21/02E02D33/00
CPCG06Q10/04G06F30/20E02D33/00G01D21/02
Inventor 陈华艳罗才松王枫轩周亦涛詹金武付朝江林新田金诚陈海山郭徽亮
Owner FUJIAN UNIV OF TECH
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