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Subbase course stabilizing treatment method for soft foundation excavation roadbed

A technology for stabilizing the subbase, which is applied in roads, roads, buildings, etc., can solve the problems that the stability of the subbase cannot be guaranteed, disturb the silt in the lower part of the foundation trench, and the construction process is complicated, so as to reduce the uneven settlement of the subgrade and reduce the disturbance , overall good effect

Active Publication Date: 2014-05-07
JIANGSU NATURE WAY TECH
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AI Technical Summary

Problems solved by technology

This kind of soft soil foundation reinforcement method has the problems of complex construction technology and high cost
In addition, when building an excavated subgrade on a soft soil foundation, the soil on both sides often collapses when the foundation trench is excavated; when the subbase is backfilled, the mud at the bottom of the foundation trench is disturbed, which causes certain difficulties to the construction
At present, in order to solve the problem of foundation trench collapse, the commonly used method is to increase the slope, but increasing the slope will significantly increase the project cost, and the stability of the subbase cannot be guaranteed

Method used

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  • Subbase course stabilizing treatment method for soft foundation excavation roadbed
  • Subbase course stabilizing treatment method for soft foundation excavation roadbed

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Embodiment Construction

[0021] The present invention is described in detail below in conjunction with accompanying drawing:

[0022] Such as figure 1 As shown, the present invention provides a method for stabilizing the subbase of a soft ground excavation roadbed, comprising the following steps:

[0023] S1, according to the design drawings, excavate the foundation trench along the excavation line 2 of the foundation trench, stop excavation after digging to L meters above the designed trench bottom, and then retain the retained soil with a thickness of L meters above the designed trench bottom; where, L≥ 0.2 meters;

[0024] In this step, according to specific process requirements, the value range of L is: 0.2m≤L≤0.5m, for example, the value can be 0.5m.

[0025] see figure 2 , it can be seen that the foundation trench excavation line 2 involved in the present invention is above the traditional excavation line 1, and the foundation trench slope involved in the present invention is steeper than th...

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Abstract

The invention provides a subbase course stabilizing treatment method for a soft foundation excavation roadbed. The method comprises the following steps: S1. excavating a foundation trench along a foundation trench excavation line (2) according to design paper, stopping excavating when the foundation trench is excavated to a part which is L meters above the designed trench bottom, and keeping retention soil with the thickness of L meters above the designed trench bottom, wherein L is more than or equal to 0.2 meter; S2. uniformly spraying curing agents on the retention soil, uniformly stirring and mixing the curing agents and the retention soil to obtain in-situ stabilized soil (3); and S3. performing rolling compaction and flattening on the in-situ stabilized soil (3) for curing to obtain the subbase of the roadbed after stabilization treatment. The foundation trench subbase course is treated by adopting an in-situ curing mode, the earth volume and backfill amount of foundation trench excavation are effectively reduced, the foundation trench stabilizing treatment efficiency is improved, and the foundation trench excavation and backfill cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of soft foundation excavation subgrade construction, and in particular relates to a method for stabilizing a subbase of a soft foundation excavation subgrade. Background technique [0002] In my country, there are widely deposited soft soil layers such as oceans, lakes, and river tidal flats. The weak soil layer has the characteristics of high natural moisture content, large natural void ratio, high compressibility, low shear strength, and large disturbance. Considerable settlement and settlement difference under load, resulting in poor engineering properties. Therefore, when large-scale construction is carried out on soft soil foundations, it is necessary to treat and reinforce the soft soil foundations. In the prior art, the vacuum preloading method is one of the effective methods for dealing with soft soil foundations. The construction process is as follows: setting sand wells or drainage boards in the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/04
Inventor 钟天雪刘玉华
Owner JIANGSU NATURE WAY TECH
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