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Composite replacing and filling structure and treatment method for valley-type soft soil

A composite, soft soil technology, used in roads, buildings, roads, etc., can solve the problems of large amount of soft foundation replacement, huge costs, and shortage of material sources, so as to shorten the construction time, shorten the construction time, and reduce the production cost. Effect

Pending Publication Date: 2017-07-25
GUANGXI COMM PLANNING SURVEYING & DESIGNING INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the soft soil of valley facies is relatively developed in the granite area, and the thickness of the soft soil is relatively large. If all soft soil replacement materials are purchased from hard materials such as gravel, gravel, and flakes, only soft foundation treatment will incur huge costs.
Usually, the soft soil area of ​​granite valley facies has the following characteristics: First, the amount of soft foundation replacement along the line is large, and the amount of excavation of the mountain body is also large. There will also be a large amount of silt and mountain excavation spoils; second, there are no large and medium-sized rivers and quarries near most of the route, so the sources of materials such as gravel, gravel, and flakes are in short supply, and the output of the material field is limited. Far; Third, land acquisition for spoil sites along the line is difficult and expensive

Method used

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  • Composite replacing and filling structure and treatment method for valley-type soft soil
  • Composite replacing and filling structure and treatment method for valley-type soft soil
  • Composite replacing and filling structure and treatment method for valley-type soft soil

Examples

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no. 1 example

[0035] see figure 1 , the present embodiment provides a composite replacement structure 10 of soft soil of valley phase, which is applied to the treatment of soft soil foundation of valley phase in granite areas, which can save engineering investment, shorten construction time, and effectively ensure the treatment effect of soft ground. Among them, the valley-facies soft soil composite replacement structure 10 includes a granite residual soil layer 100, a crushed stone layer 200 and a chipping stone layer 300. superior.

[0036] Please refer to figure 1 and figure 2 , in this embodiment, the granite residual soil layer 100, the crushed stone layer 200 and the flake layer 300 are laid below the ground level. The compaction degree of each layer is required to meet the requirements of 90% to 93%, so as to avoid excessive settlement or foundation instability due to insufficient compaction of the granite residual soil layer 100, crushed stone layer 200 and flake layer 300, maki...

no. 2 example

[0046] Please refer to figure 1 and image 3 , this embodiment provides a granite valley-facies soft soil subgrade 11, which uses the valley-facies soft soil composite replacement structure 10 provided in the first embodiment, which can save engineering investment, shorten construction time, and effectively ensure soft soil. base treatment effect. Among them, the soft soil roadbed 11 of granite valley phase includes a highway roadbed 400 and a composite replacement structure 10 of valley phase soft soil.

[0047] The highway subgrade 400 is set on the granite residual soil layer 100, and the cross section of the highway subgrade 400 is roughly trapezoidal. for the vehicle to drive. In this embodiment, roadbed side ditches 420 are respectively opened on both sides of the roadbed 400. The roadbed side ditch 420 is consistent with the extension direction of the roadbed 400. Avoid too much accumulated water from affecting the stability of the roadbed 400 . In addition, a plur...

no. 3 example

[0051] see Figure 4 , this embodiment provides a treatment method, which is applied to the valley phase soft soil composite replacement structure 10 provided in the first embodiment, which can shorten the construction time, reduce production costs, and ensure that the soft foundation treatment effect can achieve a better good standard. Among them, the treatment method includes the following steps:

[0052] Step S101, construction preparation;

[0053] Wherein, the preparation step includes: preparing the rubble required for laying the rubble layer 300, and the uniaxial saturated compressive strength of the rubble is greater than or equal to 30MPa; preparing the crushed stone required for laying the crushed stone layer 200, and the mud content of the crushed stone is less than 5%, dry density greater than 2.0t / m 3 Prepare the granite residual soil required for laying the granite residual soil layer 100, and the liquid limit of the granite residual soil is less than 50%, the...

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Abstract

The invention provides a composite replacing and filling structure and treatment method for valley-type soft soil, and relates to the field of soft soil foundation treatment. The composite replacing and filling structure suitable for the valley-type soft soil in granite areas can be applied to rapid replacing and filling treatment of the valley-type soft soil in the granite areas, and comprises a granite residual soil layer, a rubble layer and a flagstone layer from top to bottom, wherein flagstones are arranged at the bottom of a foundation pit, rubbles are laid on the flagstones to serve as a transition layer, and the granite residual soil layer is laid on the rubble layer. The invention further provides the treatment method which is applied to the replacing and filling structure for the valley-type soft soil in the granite areas. By adoption of the replacing and filling structure and the treatment method for the valley-type soft soil in the granite areas, the granite residual soil can be excavated fully; and compared with out-purchased materials such as flagstones, rubbles and gravels for replacing and filling of soft soil foundations, replacing and filling cost of the soft soil foundations is reduced, construction time is shortened, and thus good and desirable soft soil foundation treatment effects are achieved.

Description

technical field [0001] The invention relates to the field of soft soil foundation treatment, in particular to a composite replacement and filling structure and a treatment method for valley facies soft soil. Background technique [0002] Granite residual soil is a special soil, which has the characteristics of high gravel content, high strength and bearing capacity after compaction. According to the requirements of "Code for Design of Highway Subgrade" (JTG D30-2015) and "Technical Guidelines for Standardization of Expressway Construction", soft foundation replacement materials are generally water-permeable materials such as gravel, gravel, flakes, and hard rock slag. However, the soft soil of valley facies is relatively developed in the granite area, and the thickness of the soft soil is relatively large. If the soft soil replacement materials are all purchased from hard materials such as gravel, crushed stone, and flakes, only the soft foundation treatment will incur huge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04
CPCE01C3/00E01C3/04
Inventor 刘先林米德才何军赵勇漆春骆俊晖李耀华叶琼瑶唐正辉谢东邓胜强匡波农承尚
Owner GUANGXI COMM PLANNING SURVEYING & DESIGNING INST
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