General provisions for the construction of long auger drilling piles:
1Should be familiar with geotechnical engineering investigation report, pile foundation engineering, foundation pit enclosure construction design documents and drawing review data.And do a good job of construction plan and safety technology disclosure to the operators.
2Write special construction plan according to the characteristics of the project,Specifically, it includes the following:
(1) Project overview, geotechnical characteristics of each soil layer, specifications and quantity of piles, project quality requirements and construction period requirements;
(2) Construction plan:Indicate pile position, pile number, construction sequence, location of water and electricity lines and temporary facilities;
(3) Determine the type of drilling rig, supporting drilling tools, auxiliary equipment and reasonable construction technology;
(4) Construction site planning, construction progress and labor organization plan;
(5(Mechanical equipment and material supply plan;
(6) Construction management requirements:Project progress control, quality assurance measures, material cost control, safe and civilized construction measures, environmental protection measures.
3, the selected pressing grouting pile machine and supporting equipment should have quality and safety factory certificate.Maintenance record. Its performance indicators should comply with the current national and local standards.
4The steel shall have the ex-factory quality certificate and test report sheet, Inspection shall be conducted in batches upon entry, And according to the current national and local standards of the sample for reinspection, qualified can be used. Commercial concrete shall be used . Its quality and technical performance should meet the current national and local standards and design requirements.
5Site leveling shall be carried out before construction,The ground slope should be less than3%. The ground bearing capacity shall meet the grounding pressure requirements of the construction pile machine .The bearing capacity of natural foundation should not be less than50kN/㎡. If it does not meet the requirements, corresponding ground treatment measures should be taken. The bearing capacity of the foundation of temporary construction road should meet the safety of material transportation and piling soil transportation.
6In the construction area.There shall be no underground obstacles that may hinder construction. Underground pipelines or high voltage lines.When it can't be avoided.The barrier should be cleared in advance or there should be protection and protective measures in accordance with safety specifications.
7Pile test should be carried out before the construction of pressurized irrigation pile.To determine the following technical parameters:
(1) whether the pile diameter meets the design requirements;
(2) hole forming depth capacity and hole forming diameter;
(3) Control current of hole forming and final hole and drilling speed;
(4) between adjacent piles.For the foundation pit retaining pile, the jumping distance of pile should be determined.
(5) the amount of concrete for each pile and the height of overpoured concrete;
(6) Determine the relevant construction parameters of the construction control system, such as perpendicularity, rotational speed and drilling lifting speed;
(7) to determine concrete performance parameters(Workability, degree of collapse )And the distance of conveying concrete.
Shanghai Qiangqiang Foundation Engineering Co., LTD. 's business covers foundation pit engineering, pile foundation engineering, land and waterFoundation treatment, slope treatment and other engineering fields. around" Excellent technology, reliable process, fast construction "technical requirements, is to provide customers with land, water foundation engineering technical consultation, construction services and other comprehensive solutions of the entity enterprise.Contact Number:400-100-2850