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Treatment method for strengthening soft soil foundation through combination of vacuum pre-pressing and foundation heating method

A soft soil foundation and treatment method technology, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of small strength increase and cannot meet the requirements of foundation use, and achieve the effect of reinforcement quality assurance

Inactive Publication Date: 2017-11-10
TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +3
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Problems solved by technology

However, the conventional drainage consolidation method is used to strengthen the newly dredged and filled mud and floating mud. After 3 to 5 months of preloading and reinforcement, the settlement of the foundation is relatively significant, often exceeding the theoretical calculation by a lot, but the strength after reinforcement The increased value is small and cannot meet the use requirements of the foundation

Method used

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  • Treatment method for strengthening soft soil foundation through combination of vacuum pre-pressing and foundation heating method
  • Treatment method for strengthening soft soil foundation through combination of vacuum pre-pressing and foundation heating method
  • Treatment method for strengthening soft soil foundation through combination of vacuum pre-pressing and foundation heating method

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0029] A treatment method for strengthening soft ground by vacuum preloading combined with ground heating method, comprising the following steps:

[0030] Step 1: Lay two layers of bramble 1 on the site to be treated, and lay 250g / m on the bramble layer 2 Weaving cloth 2, and laying 40cm thick medium-coarse sand 3 on the weaving cloth layer as a working cushion;

[0031] Step 2: Drill vertical plastic drainage boards 4 in the soil, the plastic drainage boards 4 are arranged in a lattice, lay horizontal filter pipes on the medium-coarse sand 3, and tie the heads of the plastic drainage boards 4 to the horizontally arranged filter pipes. on tube 5;

[0032] Step 3: Place the pressure guiding and diverting device 7 (the pressure guiding and diverting device 7 adopts "a pressure guiding and diverting device suitable for vacuum preloading foundation ...

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Abstract

The invention discloses a treatment method for strengthening a soft soil foundation through combination of vacuum pre-pressing and a foundation heating method. Vertical plastic water discharging plates are arranged in a foundation, plate heads of the vertical plastic water discharging plates are connected to transversely-arranged filter pipes, and the outlet ends of all the filter pipes communicate with an inlet of a pressure guiding and flow distributing device; heating devices are further arranged in the foundation, a sand cushion layer is laid on the foundation, the filter pipes are embedded in the sand cushion layer, a heat preservation layer is laid on the sand cushion layer, a sealing film is laid on the heat preservation layer, and a closed vacuum pre-pressing system is formed. During work, the pressure guiding and flow distributing device is started firstly, and foundation strengthening treatment is conducted through a conventional vacuum pre-pressing method; when conventional drainage consolidation is conducted to the later period, a temperature control heating body is started for foundation heating, meanwhile, the foundation is subjected to vacuum pumping, water in the foundation is converted into the gas state from the liquid state through control over the foundation heating temperature and the foundation absolute pressure intensity, the water content of the foundation is further reduced, and the strength of the foundation is enhanced.

Description

technical field [0001] The invention belongs to the technical field of treatment methods for large-area soft soil foundations, in particular to a treatment method for strengthening soft soil foundations by vacuum preloading combined with foundation heating methods. Background technique [0002] The prominent feature of the newly dredged supersoft soil is that the surface strength is extremely low, and its foundation treatment is a recognized problem at home and abroad. This kind of foundation is generally reinforced by drainage consolidation method. In my country, surcharge preloading method, vacuum preloading method or vacuum combined surcharge preloading method are mainly used. However, the conventional drainage consolidation method is used to reinforce the newly dredged and filled mud and floating mud. After 3 to 5 months of preloading and reinforcement, the settlement of the foundation is relatively significant, often exceeding the theoretical calculation by a lot, but t...

Claims

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Application Information

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IPC IPC(8): E02D3/10E02D3/11
CPCE02D3/10E02D3/11
Inventor 尹长权李明英
Owner TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG
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