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Settlement deformation prevention structure and construction method thereof

A technology of deformation structure and anti-settlement, applied in basic structure engineering, construction, sheet pile wall, etc., can solve the problems of uneven settlement and deformation, affecting airport operation and maintenance, difficult and weak substratum foundation treatment, etc., to achieve good economic benefits and social benefits, preventing differential settlement after construction, and reducing foundation treatment costs

Pending Publication Date: 2021-12-17
民航中南机场设计研究院(广州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the formation is hard and coarse-grained (even bedrock) as a whole, due to its high strength and small deformation, there is basically no need for additional foundation treatment, and only a certain amount of replacement is required for shallow disturbed layers or hard crusts. and when the underlying layer is a soft and hard stratum, usually the soft and hard stratum includes a coarse-grained stratum and a weak underlying stratum in sequence, especially when the coarse-grained stratum is used as the surface layer, the construction machinery (discrete piles) used in the above-mentioned weak stratum , flexible piles, etc.) are difficult to penetrate the coarse-grained layer on the surface, so it is difficult to carry out foundation treatment on the soft underlying layer. Settlement and post-construction uneven settlement and deformation lead to road pavement disease and affect the normal operation and maintenance of the airport

Method used

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  • Settlement deformation prevention structure and construction method thereof
  • Settlement deformation prevention structure and construction method thereof
  • Settlement deformation prevention structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment 1 provides an anti-settling deformation structure, including a foundation 1, a rigid pile 2, a composite layer 3 and a pavement structure layer 5;

[0032] figure 1 It is the schematic diagram of the transverse section structure of the anti-settling deformation structure in embodiment 1, as figure 1 As shown, the foundation 1 sequentially includes a hard crust formation 11, a weak formation 12 and a bearing formation 13 from top to bottom;

[0033] Rigid pile 2 is composite concrete pile, and its number is at least 2, and each rigid pile 2 comprises pile cap 21 and pile body 22; The cross-sectional area of ​​the body 22; the concrete strength grade of the pile body 22 is C5-C25; figure 2 It is the top view of the anti-settling deformation structure in embodiment 1, as figure 1 and figure 2As shown, all rigid piles 2 are arranged in a row, wherein the pile cap 21 of each rigid pile 2 is located in the hard crust formation 11, and is flush with the u...

Embodiment 2

[0045] This embodiment 2 provides the anti-settling and deformation structure, which is similar to the anti-settling and deformation structure of embodiment 1, and its distinguishing technical features are: the strength level of the pile body 22 is C5; the pile body 22 is embedded in the pile cap 21 The inner depth is 10cm; the diameter d1 of the pile body 22 is 300mm; the distance d2 between the pile bodies 22 is 3 times d1; the thickness h of the pile cap 21 is 300mm, and the length L and width d3 of the pile cap 21 are 2d1; The cushion layer 31 is composed of graded sand and gravel, the particle size of the graded sand and gravel is 3cm, the degree of compaction is 0.9, and the thickness of each cushion layer 31 is 25cm.

Embodiment 3

[0047] This embodiment 3 provides a kind of anti-settling deformation structure, which is similar to the anti-settling deformation structure of embodiment 1, and its distinguishing technical features are mainly: the strength grade of the pile body 22 is C25; the diameter d1 of the pile body 22 is 800mm; the distance d2 between the pile bodies 22 is 7 times d1.

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Abstract

The invention discloses a settlement deformation preventing structure and a construction method thereof. According to the settlement deformation preventing structure, a bearing stratum-pile body-pile cap-composite layer system is formed, a foundation bears loads, the loads are reasonably distributed through a mattress layer and a geocell layer, most loads are transmitted to the pile body through pile caps, meanwhile, the adverse effect that the pile caps are ejected out of the mattress layer due to stress concentration is prevented, rigid piles are fixed to a bearing stratum, loads can be transmitted to the bearing stratum, secondary consolidation settlement of a soft stratum is avoided, meanwhile, settlement deformation of a foundation between the rigid piles can also be subjected to coordinated deformation distribution through a composite layer, the effects of reducing overall post-construction settlement and preventing post-construction differential settlement are achieved, and the rigid piles have the hardness capable of penetrating through hard shell stratums and soft stratums, meanwhile, the bearing capacity of natural bearing stratums is utilized, so that the foundation treatment cost is reduced, and good economic benefits and social benefits are achieved. The settlement deformation prevention structure can be applied to settlement deformation prevention of airports.

Description

technical field [0001] The invention belongs to the technical field of track engineering in civil aviation flight areas, and in particular relates to an anti-subsidence deformation structure and a construction method thereof. Background technique [0002] In recent years, with the continuous expansion of the scale and quantity of airport construction in my country, the strata encountered in airport construction projects have become more and more complex, and the technical requirements for processing methods have become higher and higher. The low-level settlement and deformation indicators have strict control standards. The settlement and deformation indicators include two parameters: post-construction settlement and post-construction differential settlement. For soft soil layers, it is generally necessary to focus on post-construction settlement due to secondary consolidation settlement, and post-construction differential settlement Settlement, that is, uneven settlement defor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/08E02D5/34
CPCE02D3/08E02D5/34
Inventor 颜斌李叶成吴彦明陈钦文
Owner 民航中南机场设计研究院(广州)有限公司