Foundation heating device and construction method for foundation heating combined vacuum prepressing of soft soil foundation by applying such device
A technology of heating device and construction method, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of small increase in strength, can not meet the requirements of foundation use, etc., achieve effective stress increase, increase vacuum suction and Capillary action, good heating effect
Pending Publication Date: 2017-09-22
TIANJIN UNIV
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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
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Embodiment 1
[0032] See attached figure 1 , a ground heating device, comprising a steel pipe 6.1, the bottom of which is tapered so as to be inserted into the soft soil foundation, the overall length of the steel pipe 6.1 is 6-10m, and can be spliced by multi-section steel pipes through the flange 6.2, and the steel pipe is provided with Electric heating tube 6.3 and heat conduction oil, the top of the steel pipe is provided with a sealing cover 6.4, the electric heating tube 6.3 is connected with a power supply wire 6.5, the power supply wire passes through the sealing cover 6.4, and a cable 6.6 is arranged on the sealing cover. The ring 6.7 is used to pull the steel pipe out of the foundation through the cable 6.6; when in use, the power supply wire 6.5 leads out the sealing film through the film-exiting device and connects to an external power supply.
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The invention discloses a foundation heating device and a construction method for foundation heating combined vacuum prepressing of a soft soil foundation by applying such device. Vertical plastic draining plates are arranged in a foundation, plate heads of the vertical plastic draining plates are connected to transversely arranged filter pipes, outlet ends of all filter pipes are communicated with an inlet of a pressure guiding flow separating device, heating devices are further arranged in the foundation, a sand cushion layer is paved on the foundation, the filter pipes are buried in the sand cushion layer, a thermal insulation layer is paved on the sand cushion layer, and a sealing film is paved on the thermal insulation layer to form a closed vacuum prepressing system. During work, the pressure guiding flow separating device is firstly opened to perform foundation reinforcing treatment by a general vacuum prepressing method; when general drainage consolidation is performed to the later stage, a temperature control heating body is opened to perform foundation heating, meanwhile the foundation is vacuumized, and by controlling a foundation heating temperature and a foundation absolute pressure, water content in the foundation is converted to a gas state from a liquid state, and therefore, the water content of the foundation is further reduced, and the strength of the foundation is increased.
Description
technical field [0001] The invention belongs to the technical field of large-area soft soil foundation treatment, in particular to a foundation heating device and a construction method for using the device to carry out foundation heating combined with vacuum preloading to treat soft soil foundation. 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 theo...
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IPC IPC(8): E02D3/11E02D3/10
CPCE02D3/103E02D3/11E02D2250/0053
Inventor 尹长权刘润
Owner TIANJIN UNIV
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