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Roller compacted concrete cushion changing and filling method

A concrete cushion and reporting technology, which is applied in the field of basic soil survey, soil protection, construction, etc., can solve the problems of difficult compaction of replacement materials, high cost and long construction period, and reduce the cost of aggregate raw materials. , cost reduction and high bearing capacity

Active Publication Date: 2011-02-16
成都四海岩土工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concrete replacement means that the replacement material is concrete. The replacement construction is more convenient and the bearing capacity is higher, but the replacement cost is higher. At the same time, due to the high strength of the replaced concrete, it is not easy to compress, and the local parts and the non-replaced parts Uneven settlement, causing uneven settlement of buildings
Replacement of gravel soil or lime soil means that the replacement material is gravel soil or lime soil, but because the replacement material is not easy to compact or the strength of the replacement material itself is insufficient, it is difficult to meet the design requirements for those with high bearing capacity requirements
High-pressure rotary grouting piles, CFG piles or other pile foundations are all expensive and have a long construction period

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The inventive method comprises the following steps:

[0029] 1. Tank inspection:

[0030] 1) According to the geological survey report, determine the processing depth and scope;

[0031] 2) Excavate the foundation pit to the design elevation, use brazing to confirm the treatment range and depth again, and at the same time conduct brazing to the areas not covered by the geological survey report to find out whether there is a weak underlying layer, and then combine the geological survey report of this project , outlining the approximate area that needs to be addressed.

[0032] 2. Excavation of foundation trench earthwork:

[0033] After testing the tank, remove the soft lying soil layer below the base in time until 20cm below the top surface of the bearing layer. After cleaning, you can apply for further tank inspection until the tank inspection requirements are met;

[0034] In the process of clearing the soft lying soil layer, a step is left along the edge of the re...

Embodiment 2

[0055]The other methods of this embodiment are the same as in Embodiment 1, except that the materials in the following parts by weight are stirred evenly with a mixer to form a replacement material:

[0056] 120kg of water, 80kg of cement, 250kg of fly ash, and 1900kg of graded gravel.

Embodiment 3

[0058] The other methods of this embodiment are the same as in Embodiment 1, except that the materials in the following parts by weight are stirred evenly with a mixer to form a replacement material:

[0059] Water 100kg, cement 100kg, fly ash 220kg, graded crushed stone 2000kg.

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Abstract

The invention provides a roller compacted concrete cushion changing and filling method, which relates to a foundation processing method, in particular to a changing and filling method of a large-area shallow soft foundation and an uneven foundation. The roller compacted concrete cushion changing and filling method comprises the following steps of: checking a foundation trench; excavating the foundation trench and an earthwork; mixing changing and filling materials; spreading; and rolling and compacting. The changing and filling materials comprise the following components in parts by weight: 90-120 parts of water, 80-120 parts of cement, 200-250 parts of fly ash and 1900-2300 parts of graded broken stone or 90-120 parts of water, 80-120 parts of cement, 2100-2300 parts of sand mixing stone. The roller compacted concrete cushion changing and filling method has high bearing capacity, low cost and quick construction period.

Description

Technical field: [0001] The invention relates to a method for replacing and filling a roller compacted concrete cushion, which relates to a foundation treatment method, in particular to a method for replacing and filling large-area shallow soft foundations and uneven foundations. Background technique: [0002] Existing treatment of weak foundations is either to replace and fill, or to use high-pressure jet grouting piles, CFG piles or other pile foundations, and to replace and fill with materials such as concrete, gravel soil or lime soil. Concrete replacement means that the replacement material is concrete. The replacement construction is more convenient and the bearing capacity is higher, but the replacement cost is higher. At the same time, due to the high strength of the replaced concrete, it is not easy to compress, and the local parts and the non-replaced parts Uneven settlement causes uneven settlement of buildings. Gravel soil or lime soil replacement means that the...

Claims

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Application Information

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IPC IPC(8): E02D3/00E02D3/046E02D1/00
Inventor 岳大昌谭建忠李明苏子将陈启春闫北京
Owner 成都四海岩土工程有限公司
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