Self-compacting soil, preparation method thereof and construction method for backfilling municipal cavity

A construction method and self-compacting technology, applied in construction, road, road repair and other directions, can solve the problems of difficulty in rolling, compacting and compacting the axillary angle of backfill, poor bonding effect of undisturbed soil, and high manufacturing cost of backfill materials. Save the cost of spoil transportation, save the project cost, and have a good effect of backfilling

Inactive Publication Date: 2020-11-10
POWERCHINA WATER ENVIRONMENT GOVERANCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a method for preparing self-compacting soil, which aims to solve the problem of the cavity formed by the existing municipal earthwork excavation, such as the cavity at the bottom of the road surface, etc., and the manufacturing cost of the backfill material for the cavity. High, the backfill is difficult to compact or tamp the axil corners of the cavity, and the combination effect with the undisturbed soil around the cavity is not good, resulting in poor filling effect, large void ratio, and it is often necessary to fill with multiple axillary corners for convenient filling. One-step excavation of small cavities, and then re-laying of filling materials, high excavation costs, prolonging construction time and other technical problems

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  • Self-compacting soil, preparation method thereof and construction method for backfilling municipal cavity
  • Self-compacting soil, preparation method thereof and construction method for backfilling municipal cavity

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preparation example Construction

[0039] The embodiment of the present invention provides a preparation method of self-compacting soil, comprising the following steps:

[0040] S10. Obtain undisturbed soil, and after performing desilting and impurity removal treatment on the undisturbed soil, measure the moisture content of the undisturbed soil;

[0041] S20. Obtain cement, the mass ratio of the cement to the dry soil in the undisturbed soil is 1: (3-4);

[0042] S30. Obtain water, so that the ratio of the total mass of the dry soil in the cement and the undisturbed soil to the total mass of the water in the self-compacting soil is 1: (1.5-2.5);

[0043] S40. Obtain additives, the amount of which is 0.3% to 1.0% of the cement quality;

[0044] S50. The undisturbed soil, the cement, the water and the additive are mixed and stirred according to the ratio to obtain self-compacting soil.

[0045] In the method for preparing self-compacting soil provided by the embodiment of the present invention, the moisture co...

Embodiment 1

[0080] A kind of self-compacting soil backfilling the pavement bottom cavity formed by the excavation of the Shajing River sewage interception project in the Maozhou River Basin in Bao'an District, Shenzhen.

[0081]①Project overview: During the implementation of the pipeline network project of the Shenzhen Maozhou River (Baoan Area) water environment comprehensive improvement project, the geological conditions in the pipeline network laying area are complex, mainly consisting of silty soil, miscellaneous fill soil and sandy soil. This sub-item is located in the administrative area of ​​Songgang Street, Baoan District, Shenzhen. The project content mainly includes the construction of the Shapu area of ​​Songgang Street, the Hongxing and Dongfanghong areas of Songgang Street, the construction of the rainwater and sewage pipe network in the area west of Songgang Avenue, Lougang, Songgang Street, and The construction of the connection and improvement project of the sewage pipe net...

Embodiment 2

[0086] A kind of self-compacting soil backfilling the pavement bottom cavity formed by the excavation of the comprehensive improvement project of the pond's downwelling in the Maozhou River Basin in Bao'an District, Shenzhen.

[0087] ①Project overview: During the implementation of the pipeline network project of the Shenzhen Maozhou River Water Environment Comprehensive Improvement Project, the pipeline network construction is widely distributed and the geological conditions in the construction area are complex. This sub-item is located in the administrative area of ​​Songgang Street, Baoan District, Shenzhen. The project mainly includes Yanchuan Village Area of ​​Songgang Street, Tangxiayong Industrial Area of ​​Songgang Street, Tangxiayong Area of ​​Songgang Street, and rainwater and sewage diversion pipes of Hongqiaotou Area of ​​Songgang Street The construction of the network, and the construction of the reclaimed water replenishment project of the Songgang Water Purificat...

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Abstract

The invention belongs to the technical field of civil engineering, and particularly relates to self-compacting soil which comprises undisturbed soil, cement, water and an additive, wherein the mass ratio of the cement to dry soil in the undisturbed soil is 1: (3-4), the ratio of the total mass of the cement and the dry soil in the undisturbed soil to the mass of the water is 1: (1.5-2.5), and theadditive amount of the additive is 0.3%-1.0% of the mass of the cement. According to the invention, the undisturbed soil excavated from the to-be-backfilled cavity due to municipal engineering earthwork is used as a main raw material, and the cement, the water, the additive and other raw materials in a specific ratio are combined, so the undisturbed soil of the to-be-backfilled cavity is reasonably utilized, the use cost of the raw materials is reduced, and the cavity backfilling cost and the engineering cost are reduced; and the self-compacting soil has good self-compacting property, reasonable fluidity, good compressive strength and good backfilling effect.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a self-compacting soil, a preparation method thereof, and a construction method for backfilling municipal cavities. Background technique [0002] With the rapid development of urbanization in my country, urban municipal roads, bridges, tunnels, subways and other projects are in full swing, and trench earthwork excavation projects are increasing day by day. Trench earthwork excavation causes soil settlement on both sides. Cavities are formed on both sides of the digging, especially at the bottom of the pavement, which destroys the stability and compressive strength of the road pavement, causes safety hazards, and leads to road pavement damage. In the municipal earthwork excavation, in order to ensure the quality of the project and the smooth progress of the project construction, it is necessary to backfill the cavity formed by the municipal earthwork excavatio...

Claims

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Application Information

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IPC IPC(8): C04B28/04E01C23/10
CPCC04B28/04E01C23/10C04B14/361C04B2103/0068
Inventor 陈惠明朱先杰辜晓原商放泽李金波陈秋宇邱礼城曹永生
Owner POWERCHINA WATER ENVIRONMENT GOVERANCE
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