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Controlling and compacting method for collapsible loess

A technology of collapsible loess and static pressure, which is used in the field of controlled compaction for collapsible loess to achieve the effect of reducing water loss

Inactive Publication Date: 2017-01-04
MAANSHAN MCC17 ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing mature collapsible loess foundation treatment methods can generally only eliminate the collapsibility of the foundation soil 10-15m below the base. A New Method for Depressed Loess Foundation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for controlling compaction of collapsible loess provided by the present invention comprises the following steps:

[0046] 1. Construction preparation:

[0047] ⑴ Preparation of the lower bearing layer;

[0048] ①The lower bearing layer must pass the inspection;

[0049] ② Excavate the loose soil at the slope foot of the "V" ditch to ensure that the junction is fully overlapped;

[0050] ③ Sprinkle water before putting on the soil, and press it statically to ensure that the surface is moist and not loose;

[0051] ⑵, technical preparation;

[0052] ① The standard test is completed;

[0053] ② Technical disclosure was made to the on-site technicians and construction personnel;

[0054] ③Measurement stakeout:

[0055] a. Set up 3 loose-laying thickness sample piers at left, middle and right intervals of 20m to guide mechanical paving;

[0056] b. Make a square grid, 10m×10m;

[0057] ⑶Material preparation;

[0058] ①Unload soil from the top of the road cu...

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PUM

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Abstract

The invention discloses a controlling and compacting method for collapsible loess. By means of the method, the necessary moisture content of roadbed filling soil before filling is effectively controlled, the height of a sample pier is considered in the paving process, it is guaranteed that corners do not lack materials, and pressing and leveling are conducted on needed positions after paving is finished. A combined rolling mode is adopted in the rolling process, different rolling processes are adopted for different rolling areas, and a small tamping machine and a manual tamping method are adopted for rolling of the corners. In order to guarantee the degree of compaction, the rolling speed of rolling machines is not greater than 3 km / h; and in order to reduce water dissipation, paving is not conducted in the noon, and procedures need to be tightly joined.

Description

technical field [0001] The invention relates to a controlled compaction method for collapsible loess. Background technique [0002] Collapsible loess is an unsaturated under-pressure dense soil with large pores and vertical joints. Under natural humidity, its compressibility is low and its strength is high, but when it is wetted by water, the strength of the soil decreases significantly. The induced collapsing deformation is a destabilizing deformation with large sinking amount and fast sinking speed, which is very harmful to buildings. Therefore, in the construction in the collapsible loess area, according to the characteristics of the collapsible loess and the engineering requirements, comprehensive measures should be taken based on the foundation treatment to prevent the damage to the buildings caused by the subsidence caused by the foundation being soaked by water. Large-thickness self-weight collapsible loess sites generally refer to loess sites with a collapsible loes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/02E02D3/046E02D3/10
CPCE02D3/02E02D3/046E02D3/10
Inventor 张显杨柯能好雷团结丁瑞君何文斌施欣唐蒸蒸
Owner MAANSHAN MCC17 ENG TECH CO LTD
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