CN103774678A - Lime soil backfill technology - Google Patents

Abstract

A lime soil backfill technology comprises the steps that (1) soil and lime are screened respectively to ensure the fact that grain diameters meet requirements, wherein the quality and the variety of the soil and the quality and the variety of the lime meet standard requirements; (2) a blending process is carried out with the volume ratio of lime:soil=3:7; (3) a trough bottom and a base soil surface are cleaned cleanly; (4) lime soil is backfilled evenly in a multilayered mode, and flatness needs to be ensured after the backfill; (5) the lime soil is rammed according to the dry density requirement of the lime soil; (6) after the uppermost layer of the lime soil is completed, the elevation and the flatness are checked, higher portions are evened out, lower portions are supplemented with the lime soil, and the top elevation of the lime soil is -0.08m.

Description

A kind of dirt backfilling process

Technical field

The present invention relates to a kind of dirt backfilling process.

Background technology

Ash earthen backfill refers to that the part that foundation trench excavates in addition from bottom land to grade exterior wall must be grey earthen backfill, and must tamp, mainly contain two parts, when a part is foundation construction from the part of mark excavation naturally, another part is that nature absolute altitude is to design elevation part, in Specific construction, lack the method for standard, cause the poor effect of backfill.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of dirt backfilling process.

To achieve these goals, the technical solution used in the present invention is:

A kind of dirt backfilling process, comprises the steps:

The first step, the earth material and the lime that quality and kind are met to standard-required do not sieve, the sieve of 3-8mm for lime, earth material 15-18mm sieve, to guarantee particle diameter requirement;

Second step, with the volume ratio batching of volume ratio lime: earth material=3:7, uniformity, at least turns twice, and the dirt solid colour mixing, when dirt construction, is controlled water content;

The 3rd step, should clean out bottom land and base soil surface;

The 4th step, by thick 400mm dirt, point even backfill of multilayer, will pave after backfill;

The 5th step, requires to pound according to dirt dry density, after every layer of compacting of grey earthen backfill, carries out cutting ring sampling according to code requirement, measures dirt dry density, while reaching designing requirement, just can carry out spreading out and putting on of last layer dirt;

The 6th step, after the last layer of dirt completes, checks absolute altitude and planeness, and superelevation place is evened out; Dirt is mended at low-lying place, and dirt top mark height is-0.08m.

Compared with prior art, work progress of the present invention is simple, rams densification in fact, and surface is without loose, peeling.

The specific embodiment

Below in conjunction with embodiment, the present invention is described in further details.

A kind of dirt backfilling process, comprises the steps:

The first step, the earth material and the lime that quality and kind are met to standard-required do not sieve, the sieve of 3-8mm for lime, earth material 15-18mm sieve, to guarantee particle diameter requirement;

Second step, with the volume ratio batching of volume ratio lime: earth material=3:7, uniformity, at least turns twice, and the dirt solid colour mixing, when dirt construction, is controlled water content;

The 3rd step, should clean out bottom land and base soil surface;

The 4th step, by thick 400mm dirt, point even backfill of multilayer, will pave after backfill;

The 5th step, requires to pound according to dirt dry density, after every layer of compacting of grey earthen backfill, carries out cutting ring sampling according to code requirement, measures dirt dry density, while reaching designing requirement, just can carry out spreading out and putting on of last layer dirt;

The 6th step, after the last layer of dirt completes, checks absolute altitude and planeness, and superelevation place is evened out; Dirt is mended at low-lying place, and dirt top mark height is-0.08m.

Claims (1)

1. a dirt backfilling process, is characterized in that, comprises the steps:

The first step, the earth material and the lime that quality and kind are met to standard-required do not sieve, the sieve of 3-8mm for lime, earth material 15-18mm sieve, to guarantee particle diameter requirement;

Second step, with the volume ratio batching of volume ratio lime: earth material=3:7, uniformity, at least turns twice, and the dirt solid colour mixing, when dirt construction, is controlled water content;

The 3rd step, should clean out bottom land and base soil surface;

The 4th step, by thick 400mm dirt, point even backfill of multilayer, will pave after backfill;

The 5th step, requires to pound according to dirt dry density, after every layer of compacting of grey earthen backfill, carries out cutting ring sampling according to code requirement, measures dirt dry density, while reaching designing requirement, just can carry out spreading out and putting on of last layer dirt;

The 6th step, after the last layer of dirt completes, checks absolute altitude and planeness, and superelevation place is evened out; Dirt is mended at low-lying place, and dirt top mark height is-0.08m.