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A Method of Reducing Settlement of Deep and Thick Soft Soil Foundation Using Constraint Wall

A soft soil foundation and settlement technology, applied in infrastructure engineering, protective devices, buildings, etc., can solve the problems of limited treatment depth, difficult water discharge, large vibration, etc., and achieve low treatment cost, easy operation, and materials low cost effect

Inactive Publication Date: 2014-10-15
NANJING INST OF TECH
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Problems solved by technology

For example, the treatment depth of the dynamic compaction method is limited. For silty soft soil, the water in it is not easy to discharge, and the treatment is often ineffective. However, there is a lot of vibration during the treatment process, and the noise interference is serious, which is not welcomed by residents. The powder spraying method and deep stirring High cost, difficult operation, frequent accidents

Method used

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  • A Method of Reducing Settlement of Deep and Thick Soft Soil Foundation Using Constraint Wall
  • A Method of Reducing Settlement of Deep and Thick Soft Soil Foundation Using Constraint Wall
  • A Method of Reducing Settlement of Deep and Thick Soft Soil Foundation Using Constraint Wall

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Embodiment Construction

[0021] The present invention will be further described below by embodiment:

[0022] Concrete design procedure of the present invention is as follows:

[0023] (1) According to the upper load conditions, calculate the additional pressure 3 of the base.

[0024] (2) Calculate the influence depth of the additional compressive stress 3 according to the diffusion theory and foundation code.

[0025] (3) Calculate the corresponding additional compressive stress intensity within the depth range affected by the additional compressive stress.

[0026] (4) Calculate the corresponding lateral expansion force 4 according to the intensity change of the additional compressive stress, and determine the required constraint depth according to the intensity of the constraint force. The direction of passive earth pressure 5 is opposite to that of lateral expansion force 4 , and the magnitude is the same, which is the reaction force of lateral expansion force 4 .

[0027] (5) Set the restrain...

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Abstract

The invention discloses a method for reducing the settlement of a deep soft soil foundation by use of a retaining wall. The method comprises the following steps of: (1) calculating the retaining pressure and additional pressure according to the soil conditions of the land where the building is located and the total weight and base area of the building to be built; (2) calculating the thickness of the retaining wall according to the retaining pressure, and determining the material for building the retaining wall; (3) calculating the length of the retaining wall according to the additional pressure; and (4) replacing the soft soil with corresponding thickness on the bottom surface of the building to be built by the designed retaining wall. In the invention, the soft foundation in the field of design and construction of the civil construction engineering is effectively solved, and the settlement of the deep soft soil foundation is eliminated or reduced. The processing cost of the deep soft soil foundation is low, the reliability is high, and the operation and monitoring are convenient so as to effectively reduce the total settlement of the deep soft soil foundation. The design and construction processes are simple, the required equipment is easily available, and the operability is high.

Description

technical field [0001] The invention relates to a soft foundation treatment method in the field of civil engineering design and construction, in particular to a method for reducing the settlement of deep and thick soft soil foundations. Background technique [0002] Regarding the soft (soft soil) foundation treatment technology, there are many traditional methods, such as various pile foundation technologies (bored piles, hammered piles, prefabricated piles...); various compaction technologies (sand Stone compaction method, lime compaction method, sand and gravel compaction method...). There are also many popular new technologies (such as dynamic compaction, powder spraying, deep mixing...). For the detailed introduction of the above traditional and popular technologies, please refer to the relevant chapters of the book "Civil Engineering Construction Technology" edited by Li Huimin and others (China Planning Press. 2001 edition, specially for the national registration stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D27/10E02D31/10
Inventor 何培玲谢征询谢敏谢秋菊
Owner NANJING INST OF TECH
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