Foam light soil replacing and filling soft foundation construction method suitable for coastal airport reconstruction and extension project

A foam lightweight soil and airport technology, which is applied in infrastructure engineering, construction, soil protection, etc., to achieve the effects of high reliability, convenient and efficient construction, and smooth construction.

Pending Publication Date: 2022-03-11
GUANGZHOU MARITIME INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In view of this, comprehensively considering various factors such as construction efficiency, height limit requirements, and restrictions by underground pipelines, drainage consolidation methods and general composite foundation treatment methods (cement mixing pile method, PHC pipe pile method, high-pressure rotary grouting pile method, crushed stone method, etc.) Pile method, etc.) are not applicable to the foundation treatment project of the reconstruction and expansion project of Linhai Airport

Method used

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  • Foam light soil replacing and filling soft foundation construction method suitable for coastal airport reconstruction and extension project
  • Foam light soil replacing and filling soft foundation construction method suitable for coastal airport reconstruction and extension project
  • Foam light soil replacing and filling soft foundation construction method suitable for coastal airport reconstruction and extension project

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Embodiment Construction

[0061] The present invention is implemented according to the following steps:

[0062] (1) Carry out measurement and lofting of the area to be treated with soft foundation, and prepare two types of foam light soil with different bulk density above and below water based on the predetermined construction mix ratio; since the groundwater level in the foundation of Linhai Airport is generally high, so , above the groundwater level, use foam light soil above the water, with a bulk density of 7-9kN / m 3 ;Under the groundwater level, underwater foam light soil is used, with a bulk density of 10-12kN / m 3 , and the underwater foam lightweight soil formula contains plasticizers to prevent segregation.

[0063] (2) According to the soil properties, the area 1 with poor soil properties (standard penetration hits <4) within the excavation range is divided into grid-like sub-areas of 10m*10m, and excavation of the foundation pit is carried out by means of jumping grids , the plane excavati...

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Abstract

The invention discloses a foam light soil soft foundation replacing and filling construction method suitable for coastal airport reconstruction and extension projects, which comprises the following steps: (1) surveying and setting out, and preparing foam light soil; (2) foundation pit excavation is conducted on the lattice-shaped or strip-shaped subareas in a lattice jumping or interlacing mode; (3) arranging a foundation pit support structure at the boundary of the subarea; (4) placing a floating ball; (5) the foundation pit is filled with foam light soil to the control elevation, and the foam light soil is proportioned on the water and under the water; (6) paving a steel plate or a prefabricated concrete plate on the top of the foundation pit; (7) the subarea foundation pit support structure is removed and circularly used for the next group of subareas; (8) removing the steel plate or the precast concrete plate at the top of the foundation pit; (9) geotextile and a broken stone hardcore are laid and leveled; and (10) construction is conducted according to the step (3) to the step (9). A series of problems of foundation treatment projects such as non-stop areas and height-limited areas of coastal airport reconstruction and extension projects can be solved.

Description

technical field [0001] The invention relates to the technical field of foundation treatment, in particular to the soft soil foundation treatment technology for the reconstruction and expansion project of Linhai Airport. Background technique [0002] Reconstruction and expansion projects of Linhai Airport generally include pavement structure engineering and foundation treatment engineering in runways, taxiways, and crossing areas. However, the foundation treatment project in the track area often involves non-stop areas, areas with limited and high requirements, and covers fire pipelines, power supply pipelines, navigation lighting pipelines, air traffic control communication pipelines, security pipelines, drainage pipelines, water supply pipelines, etc. areas of underground pipelines. [0003] The time limit of non-stop construction areas is very strict, and the effective construction time is often very short. For example, the time limit of Shenzhen Baoan Airport is from 2:0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D3/046E02D19/10E02D3/10E02D15/02E02D17/04E02D5/04E01C3/00E01C3/04
CPCE02D3/00E02D3/046E02D19/10E02D3/10E02D15/02E02D17/04E02D5/04E01C3/00E01C3/04E02D3/005
Inventor 鲍树峰刘向阳王雪莲刘攀张子文李建新杨朋杨娥
Owner GUANGZHOU MARITIME INST
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