Quick well formation device in soft soil layer

Abstract

The invention discloses a quick well formation device in a soft soil layer, comprising a plurality of joints of hollow drill rods which are mutually connected for forming a well and then used as a well wall and a hollow drill bit which is connected with the last joint of the hollow drill rod, wherein a filter cylinder is arranged in the hollow drill rods, the filter cylinder is connected with thelast joint of the hollow drill rod by clamping, and the hollow drill rods are mutually connected through pipe hoops. As the plurality of joints of well formation device a plurality of joints which aremutually connected for forming the well and then used as the well wall are adopted, the drill rods can be used as the well wall without being lifted out, after forming the well, the filter cylinder can be arranged downwards in the hollow drill rods after forming holes, clamped at the bottom of the drill bit and used for directly pumping underground water, the pumping of the underground water cannot be affected by the increase of the depth, the increase of the pressure and the deformation of the well wall, the reasonable setting of the porosity of filter holes on the filter cylinder can ensure the smooth collection of water samples, and the setting of a settling chamber at the lower end of the filter cylinder can settle sediment and prevent the filter holes from being blocked. The quick well formation device can quickly complete the well formation in the soft soil layer region within the underground depth of 10m; and compared with the existing drilling and the artificial excavation, the quick well formation device can save the investment in human resources and material resources, greatly improve the working efficiency and avoid the well wall collapse accidents.

Description

technical field [0001] The invention relates to a well-forming device for soft soil layers, in particular to a disposable well-forming device suitable for quickly collecting groundwater samples in soft soil layer areas without wells. Background technique [0002] In the work of collecting groundwater samples, it is often encountered that there is no groundwater outcrop at a suitable sample layout point, and groundwater samples can only be collected after a well is completed. When the hole is formed, manual excavation is time-consuming and laborious. When the depth is greater than 2 meters, the well wall is prone to collapse, which will pose a threat to the safety of the construction personnel; the caisson formation process uses the self-weight of the caisson device to overcome the friction of the foundation soil on the well wall For sinking, as the sinking depth increases, the friction force of the soil on the well wall also increases, which requires higher and higher thickn...

AI Technical Summary

Problems solved by technology

It can be seen that it is a waste of time, manpower and material resources to complete the well wall and pump water in order to collect a groundwater sample. The same is true for various manual excavation processes, and the entire well completion process will affect the component content of the groundwater sample.

Images