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Construction method for subbase layer of natural graded pebble road surface

A natural gradation and construction method technology, applied to roads, roads, on-site coagulation pavements, etc., can solve the problems of high construction cost, small contact surface, poor bite force, stability and hardening, and achieve reduction Construction cost, effect of improving bite force

Inactive Publication Date: 2012-05-30
CHINA MCC17 GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the round shape of natural pebble particles, smooth surface, small contact surface between particles, poor bite force, stability and compaction, it needs to be mechanically crushed before use, and a special mixing plant is used for factory mixing or field mixing. The construction cost higher

Method used

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  • Construction method for subbase layer of natural graded pebble road surface

Examples

Experimental program
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Effect test

Embodiment 1

[0022] First, prepare the underlayment. After inspecting the subgrade in strict accordance with the design and specification standards, carry out measurement and lofting and divide the cloth grid. Restore the middle piles at 20m intervals for straight road sections and 10m intervals for curved road sections, and release the sidelines; according to the design thickness of the subbase of 30cm, the loose paving coefficient of 1.30 given by the laboratory, and the vehicle capacity of the material transporter, mark the paving capacity of each vehicle. Area range, and draw a grid line on the top surface of the subgrade with white ash.

[0023] The second step is to pave natural graded pebbles. According to the design thickness of 30cm and the loose paving coefficient of 1.30 given by the laboratory, the natural graded pebbles are paved with bulldozers, and the gradation of pebble particles meets the requirements of relevant specifications; Stabilize the pressure (static pressure) ...

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Abstract

The invention discloses a construction method for a subbase layer of a natural graded pebble road surface, comprising the following processing steps of: 1, lower bearing layer preparation: performing testing, measuring and lofting on a road bed and dividing distributing grids; 2, natural graded pebble paving: paving natural graded pebbles according to the design thickness and the coefficient of a loose paving material, and performing primary leveling and static press; 3, binder paving: paving 5-7 cm of rock powder in thickness and 2-3 cm of clay in thickness on the surface of a pebble layer; 4, blending: blending clay, rock dust and the natural graded pebbles together 2-3 times; 5, rolling: performing fine leveling by using a land leveler, performing static press 1-2 times by using a road roller and performing vibrational rolling 6-8 times; and 6, testing: testing compactness and a rebound deflection value. By mixing of the binder of rock dust and clay in the invention, the biting force, stability and hardening property of the natural graded pebbles are increased without performing crashing, plant mixing or site mixing on the natural graded pebbles nor performing secondary carrying, and the construction cost is reduced.

Description

technical field [0001] The invention relates to a construction method of a natural graded pebble pavement subbase, which can be widely used in the construction fields of expressway pavement subbases and general highway pavement bases. Background technique [0002] Pebbles, commonly known as pebbles, generally come from rivers, are a good building material, and are ideal materials for highway pavement subbases and general highway pavement bases. However, due to the round shape of natural pebble particles, smooth surface, small contact surface between particles, poor bite force, stability and compaction, it needs to be mechanically crushed before use, and a special mixing plant is used for factory mixing or field mixing. The construction cost higher. Contents of the invention [0003] The purpose of the present invention is exactly to aim at the above-mentioned shortcoming that exists in the prior art, to provide a kind of construction method of natural gradation pebble exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C7/04
Inventor 刘楚卫刘守诚
Owner CHINA MCC17 GRP
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