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A Construction Technology of Soft Soil Foundation

A construction technology and technology of soft soil foundation, applied in soil protection, infrastructure engineering, roads, etc., can solve the problems of cracking, reducing the service life of immersed tubes, deformation of immersed tubes, etc., to improve the bearing capacity, the construction process is simple, the The effect of improving the tightness of the connection

Active Publication Date: 2019-12-03
无锡交通建设工程集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the immersed tube has been buried underground for a long time. When the seasons change, the immersed tube will be deformed or even broken when it encounters alternating cold and heat, which reduces the service life of the immersed tube.

Method used

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  • A Construction Technology of Soft Soil Foundation

Examples

Experimental program
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Effect test

preparation example Construction

[0036] The preparation method of acrylate copolymer is as follows:

[0037] Add 100kg methyl methacrylate, 240kg hydroxyethyl acrylate, 100kg water, 15kg sodium lauryl sulfate and 5kg potassium persulfate into the emulsifier, turn on the stirring for emulsification, the stirring speed is 75r / min, and then heat up to After reacting for 3 hours at 70°C, lower the temperature, adjust the pH value to 7, and then dry in a high-temperature oven at 200°C for 2 hours to obtain an acrylic copolymer with a high viscosity.

[0038] The preparation method of geomembrane is as follows:

[0039] A film blowing machine is used to blow the modified polyvinyl chloride. The modified polyvinyl chloride is composed of the following components by weight: 70kg PVC, 30kg chlorinated polyethylene, 10kg cellulose adhesive, 5kg composite stabilizer, 3kg Filler oil and 2kg antioxidant.

[0040] The preparation method of the concrete bonding layer is as follows:

[0041] Blend 30kg of concrete, 70kg o...

Embodiment 1

[0043] A construction technique for soft ground, comprising the steps of:

[0044] (1) Delineate the construction scope, excavate the subgrade groove on the soft foundation, the depth is 2m, excavate the silt, soft flushing soil and miscellaneous filling, and fill the first sandstone layer to the bottom of the subgrade groove;

[0045](2) The first sandstone layer is followed by gravel soil layer, plain soil layer and lime soil layer from bottom to top, and the thickness of gravel soil layer, plain soil layer and lime soil layer is 60cm, 30cm and 30cm in turn;

[0046] (3) After laying the lime soil layer, use a 60kN light road roller to dry press twice; then use an 80kN medium-sized road roller to sprinkle water and roll twice; finally use soil caulking, and use a 120kN heavy-duty road roller to roll once;

[0047] (4) Cover the first gravel layer with a geomembrane and seal around it;

[0048] (5) A vacuum pump is used to pump air in the first sandstone layer, so that the f...

Embodiment 2

[0054] A construction technique for soft ground, comprising the steps of:

[0055] (1) Delineate the construction scope, excavate the subgrade groove on the soft foundation, the depth is 2m, excavate the silt, soft flushing soil and miscellaneous filling, and fill the first sandstone layer to the bottom of the subgrade groove;

[0056] (2) The first sandstone layer is followed by gravel soil layer, plain soil layer and lime soil layer from bottom to top, and the thickness of gravel soil layer, plain soil layer and lime soil layer is 50cm, 30cm and 30cm in turn;

[0057] (3) After laying the lime soil layer, use a 60kN light-duty road roller to dry-roll 3 times; then use a 100kN medium-sized road roller to sprinkle water and roll 3 times; finally use soil caulking, and use a 120kN heavy-duty road roller to roll once;

[0058] (4) Cover the first gravel layer with a geomembrane and seal around it;

[0059] (5) A vacuum pump is used to pump air in the first sandstone layer, so t...

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Abstract

The invention discloses a construction technology of a soft soil foundation. According to the technical scheme key points, the construction technology of the soft soil foundation comprises the following steps that (1), a roadbed slot is dug and filled with a first sand layer; (2) the first sand layer is coated with a soil engineering thin film and the surroundings are sealed; (3) air suction is conducted on the interior of the first sand layer by utilizing a vacuum pump; (4) the soil engineering thin film is paved with plastic drainage plates; (5) a second sand layer is laid on a filter soil engineering cloth, reinforced steel bar cages are erected on the second sand layer, and the position between adjacent reinforced steel bar cages is filled with a concrete adhesion layer; (6) pore-forming is conducted in the second sand layer by using a special vibration and punching machine tool, and the holes are filled with broken stones, pebbles or volcanic in batches; and (7) cement, lime or other chemical curing grouting materials are poured or mixed on the second sand layer. By adopting the construction technology, construction of the soft soil foundation is realized, and the bearing capability of the soft soil foundation to heavy loads is improved.

Description

technical field [0001] The invention relates to concrete construction, in particular to a construction technique for soft ground. Background technique [0002] Since the reform and opening up, with the continuous improvement of national productivity, my country's economy has developed rapidly, and the number of people's livelihood projects has continued to increase, which has expanded the construction scale of urban roads. Due to the new construction and reconstruction of urban roads and the complexity of urban underground structures, road construction has The difficulty continues to increase, especially for the construction of soft soil foundation, which increases the difficulty of road construction. [0003] Soft soil refers to the natural fine-grained soil deposited in valleys, coastal areas, river beaches, and lakes and swamps. It has the characteristics of low shear strength, low permeability coefficient, high water content, long settlement stability time, high compressi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/00E02D3/10E01C3/04C08L27/06C08L23/28C08L33/04C08K3/36C08K5/14C08J5/18
CPCC08J5/18C08J2327/06C08J2423/28C08K3/36C08K5/14E01C3/04E02D3/00E02D3/10C08L33/04
Inventor 蒋豪杜永军
Owner 无锡交通建设工程集团有限公司