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Thick collapsible loess subgrade groundwork structure

A collapsible, loess road technology, used in infrastructure engineering, roads, roads, etc., can solve problems such as uneven settlement of foundations, excessive settlement, difficulty in meeting design requirements, etc. , The overall performance is good, the effect of solving uneven settlement

Active Publication Date: 2008-05-07
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Collapsible loess foundations, especially deep collapsible loess foundations, the uneven settlement and excessive settlement caused by collapsibility are long-standing technical problems in railway construction. Conventional foundation treatment methods, such as replacement, Strong tamping, pre-soaking, etc., it is difficult to meet the design requirements

Method used

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  • Thick collapsible loess subgrade groundwork structure
  • Thick collapsible loess subgrade groundwork structure

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] With reference to Fig. 1, the deep collapsible loess subgrade foundation structure of the present invention comprises: reinforced concrete pile foundation 10, is arranged in groups at intervals along the longitudinal foundation, and its pile vertically penetrates the soil body (soft soil layer, collapsible Loess layer) is then consolidated with the bearing layer; reinforced concrete joists 20 are arranged on the top of each group of reinforced concrete pile foundations 10 and are rigidly connected with them; reinforced concrete cap slabs 30 extend along the length direction of the foundation and are supported Concrete joists 20 are over and connected thereto. The invention uses the pile-slab system as the reinforcement structure, which has the characteristics of strong adaptability, good overall performance, high rigidity, small deformation, larg...

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Abstract

The invention discloses a deep collapsible loess subgrade structure, which can strictly control the post-construction settlement and differential settlement of the collapsible loess and the deep collapsible loess foundation. It includes reinforced concrete pile foundations (10), which are arranged in groups at intervals along the longitudinal direction of the foundation, and the pile bodies are consolidated with the bearing layer after penetrating the soil vertically; The top of the foundation (10) is rigidly connected thereto; the reinforced concrete cap slab (30), extending longitudinally along the foundation, is supported on and connected to the reinforced concrete joist (20). The invention uses the pile-slab system as a reinforcement structure, which has the characteristics of strong adaptability, good overall performance, high rigidity, small deformation, large depth of untreated soil, and convenient construction, and successfully solves the problems of uneven settlement caused by collapsing The technical problem of excessive settlement can well meet the design requirements of passenger-dedicated railways with a design speed of 300-350 kilometers per hour.

Description

technical field [0001] The invention relates to a road subgrade structure, in particular to a structure of deep collapsible loess subgrade foundation. Background technique [0002] Collapsible loess is a special accumulation of the Quaternary, which has a series of unique engineering properties. In its natural state, it has many large pores visible to the naked eye, and often contains tubular pores formed by biological action. The natural section forms vertical joints, which has a certain ability to resist movement and compaction, and is an unsaturated under-compacted compacted soil. Under natural humidity, its compressibility is low and its strength is high, but when it is soaked in water, the strength of the soil is significantly reduced, and the collapsibility deformation caused by the additional pressure or the pressure of the additional pressure and the weight of the soil is a kind of The unstable deformation with large sinking amount and fast sinking speed is very har...

Claims

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Application Information

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IPC IPC(8): E01C3/00E02D27/12
Inventor 李海光李安洪罗照新苏谦孙莺丁兆锋
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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