Method and device for preventing and controlling house crack of swelled ground area

Abstract

The invention discloses a method and a device for preventing and controlling cracking of houses in expansive soil areas. The Floor of a house forms an airtight layer on the top of expansive soil; vertical pipes used for air injection are inserted into the expansive soil under the floor, and are converged to an inflation pipe by horizontal connecting pipes; a bicycle pump is adopted to pump the air into the inflation pipe; the diffusion effect of the air in a soil body is utilized to drain the moisture in the expansive soil in time, thereby greatly decreasing the water permeability performanceof the soil body, reducing the water percolating capacity to foundation expansive soil caused by water environment factors such as rainfall and so on, ensuring that the water content of the soil bodyunder the floor of the house is maintained in a low water content state for a long time, and greatly eliminating the possibility of expansive soil geologic hazards so as to realize the safety of the house. The device does not need mechanical construction, and has low construction cost, low maintenance cost during the use of the house, simple implementation, easy operation and short construction period; and towners all can grasp a use method of the device.

Description

technical field [0001] The invention relates to a method for preventing and preventing cracking of houses, in particular to a method and device for preventing and preventing cracking of houses in expansive soil areas, and belongs to the field of construction engineering. Background technique [0002] For buildings in expansive soil areas, rainfall is an important factor that causes geological disasters. The clay component of expansive soil is mainly composed of strongly hydrophilic minerals. Expansive soil swells significantly after absorbing water, shrinks significantly after losing water, reduces shear resistance when immersed in water, develops shrinkage cracks, and is extremely unstable in nature. In engineering construction, structures built on expansive soil with constant water content will not suffer damage caused by soil expansion; on the contrary, when the water content of expansive soil increases, the soil will immediately produce vertical and volume expansion in ...

AI Technical Summary

Problems solved by technology

These methods can avoid house cracking to a certain extent, but still have the following defects: 1) The cost of engineering construction is relatively high, such as replacing the original soil with expansive soil, backfilling and compacting, and adding cement or lime for soil improvement. materials, and use mechanical mixing to complete the improvement of soil properties. To deepen the foundation, it is necessary to dig a deeper foundation pit and build a larger foundation; 2) The construction period is longer

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