Slurry protection wall construction method with holes formed in cast-in-situ bored pile sand soil layer

A technology of bored piles and mud retaining walls, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as difficulty in adjusting the proportion of mud in different soil layers, easy hole collapse, buried drilling, etc., to save concrete consumption , reduce the filling coefficient and improve the integrity

Inactive Publication Date: 2014-01-15
ZHENJIANG URBAN & RURAL CONSTR FOUNDENG
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Mud is injected during the drilling process of the wall-retaining hole-forming cast-in-place pile. Its purpose is to protect the wall and discharge slag. Traditionally, natural slurry is mainly used to

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 1

[0013] The mud retaining wall construction method of the bored cast-in-place pile sandy soil layer of the present invention comprises the following steps:

[0014] (1) Before construction, pre-dug the mud pool, carry out artificial slurrying, use a mortar mixing drum, and prepare the mud according to the water-cement ratio of 0.55. % industrial alum, the mud proportion after modulation is 1.2;

[0015] (2) Carry out drilling construction, when reaching the ore soil layer, pump the prepared mud through the mud pump, inject it into the borehole to form a circulation, and protect the wall;

[0016] (3) After drilling through the sand layer, reduce the mud specific gravity to 1.1 by increasing the amount of clean water in the hole until the hole is completed.

Embodiment 2

[0018] The mud retaining wall construction method of the bored cast-in-place pile sandy soil layer of the present invention comprises the following steps:

[0019] (1) Before construction, pre-dug the mud pool, carry out artificial slurrying, and use a mortar mixing drum to prepare the mud according to the water-cement ratio of 0.6. The raw material is high-viscosity expansive soil (commonly known as clay), and high-viscosity expansive soil is added at the same time by 1.2% by weight industrial alum, the specific gravity of mud after modulation is 1.35;

[0020] (2) Carry out drilling construction, when reaching the ore soil layer, pump the prepared mud through the mud pump, inject it into the borehole to form a circulation, and protect the wall;

[0021] (3) After drilling through the sand layer, reduce the mud specific gravity to 1.25 by increasing the amount of clean water in the hole until the hole is completed.

Embodiment 3

[0023] The mud retaining wall construction method of the bored cast-in-place pile sandy soil layer of the present invention comprises the following steps:

[0024] (1) Before construction, pre-excavate the mud pool, carry out artificial slurrying, use a mortar mixing drum, and prepare the mud according to the water-cement ratio of 0.6. % industrial alum, the mud proportion after modulation is 1.3;

[0025] (2) Carry out drilling construction, when reaching the ore soil layer, pump the prepared mud through the mud pump, inject it into the borehole to form a circulation, and protect the wall;

[0026] (3) After drilling through the sand layer, reduce the mud specific gravity to 1.2 by increasing the amount of clean water in the hole until the hole is completed.

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 slurry protection wall construction method with holes formed in a cast-in-situ bored pile sand soil layer. The slurry protection wall construction method comprises the following steps: (1) before construction, a slurry pit is dug in advance, and artificial slurry making is conducted, wherein a mortar mixing drum is used for preparing slurry with a water-cement ratio ranging from 0.55 to 0.6, hyper-viscous swelling soil is used as raw materials, industrial alum which accounts for 0.8-1.2% of the hyper-viscous swelling soil in weight is added at the same time, and the specific gravity of the prepared slurry ranges from 1.2 to 1.35; (2) drilling is conducted, and the prepared slurry is pumped by a slurry pump and injected into drilled holes to form circulation so as to protect walls when an ore layer is drilled; (3) after the sand soil layer is drilled, clear water is added to the holes to reduce the specific gravity of the slurry to be within the range of 1.1-1.25 until hole forming is completed. The slurry protection wall construction method with the holes formed in the cast-in-situ bored pile sand soil layer has the advantages that compared with the prior art, the integrality of pile foundations is improved greatly under geological conditions provided with the sand soil layer, and the situation that a drilling bucket is buried or collapse occurs in the holes and other accidents due to poor quality are avoided; the concrete filling coefficient of pile shafts is reduced, and therefore the concrete consumption is reduced.

Description

technical field [0001] The invention relates to a construction method of building pile foundations, in particular to a construction method of mud retaining walls for forming holes in the sandy soil layer of bored piles, and belongs to the technical field of building construction. Background technique [0002] Mud is injected during the drilling process of the wall-retaining hole-forming cast-in-place pile. Its purpose is to protect the wall and discharge slag. Traditionally, natural slurry is mainly used to directly inject water to form mud, thereby making it suitable for different soil layers. It is difficult to adjust, especially in the sandy soil layer, it is easy to collapse in the hole and bury the drill. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a mud retaining construction method for forming holes in the sandy soil layer of bored piles, which can avoid quality accidents such as buried drilling and ho...

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): E02D5/18
Inventor 顾仲宾
Owner ZHENJIANG URBAN & RURAL CONSTR FOUNDENG
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