Construction method for test section of earthwork backfill engineering

A construction method and technology of the test section, which are applied in the direction of foundation structure engineering, foundation structure test, excavation, etc., can solve the problems of inaccurate test results, delay in normal construction, etc., achieve high reference, prevent leakage pressure or non-overlapping , the effect of reducing the possibility of problems

Inactive Publication Date: 2019-05-21
中冶成都勘察研究总院有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the technical problem that the existing earthwork backfilling construction shortens the construction period, the preliminary construction test stage is roughly carried out, the obtained test results are not accurate, and the formal construction in the later stage is likely to cause problems and delay the normal construction. Technical problem, the present invention Provide a construction method for the test section of earthwork backfill engineering

Method used

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Embodiment 1

[0022] This embodiment provides a construction method for the test section of earthwork backfill engineering, comprising the following steps:

[0023] (1) Select a typical roadbed with a length of not less than 100 meters as the corresponding test section, and calculate the main parameters of the roadbed filling;

[0024] (2) Measure and set out, level the base, pave on site according to the test paving thickness, and control the paving thickness;

[0025] (3) After rough leveling with a bulldozer, adjust the thickness of the paving on site, and use a grader for fine leveling;

[0026] (4) Roll with a heavy-duty vibratory roller, first light and then heavy, first slow and then fast, first on both sides and then in the center, two adjacent compactions require the wheel tracks to overlap each other by 40-50cm, and the entire soil layer is compacted once and then repeated rolling;

[0027] (5) Use the sand filling method to measure the degree of subgrade compaction after the si...

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PUM

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Abstract

The invention discloses a construction method for a test section of earth-rock backfill engineering, and relates to the technical field of earthwork backfill construction. The construction method comprises the following steps: (1) selecting a typical roadbed with a length of not less than 100 m as a corresponding test section, and calculating main roadbed filling parameters; (2) conducting surveying and setting out, leveling a substrate, and conducting paving on site according to a test paving thickness; (3) conducting rough leveling by using a bulldozer, conducting leveling on site to adjustthe paving thickness, and conducting fine leveling by using a land leveler; (4) using a heavy vibratory roller for rolling compaction in a mode of first light pressing and then heavy pressing, first pressing at a slow speed and then pressing a high speed and from two sides to the middle, wherein wheel marks are required to be overlapped by 40-50 cm after two adjacent times of compaction; and (5) measuring the compaction degree of the roadbed after the sixth time in the step (4) by adopting a sand filling method, making detailed records, distinguishing the rolling compaction times with the compaction degree reaching 90% or above, and determining the technological parameters of earthwork backfill construction. The method has the advantages of accurate test result and prevention of problems in formal construction.

Description

technical field [0001] The invention relates to the technical field of earth-rock backfill construction, and more particularly relates to a construction method for an earth-rock backfill engineering test section. Background technique [0002] Earthwork is the general term for earthwork and stonework, that is, soil and stone, and the unit of measurement is generally cubic meters. Common earth and rock works include: site leveling, foundation pit (trough) and pipe trench excavation, roadbed excavation, civil air defense project excavation, floor filling, roadbed filling and foundation pit backfilling. It is necessary to arrange the construction plan reasonably, and try not to arrange it in the rainy season. At the same time, in order to reduce the construction cost of earthwork works, implement the principle of not occupying or occupying less farmland and arable land, and is conducive to land improvement, a reasonable allocation plan for earthwork and overall arrangements shou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00E02D17/12
Inventor 邓安
Owner 中冶成都勘察研究总院有限公司
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