Static water head height measuring instrument for foundation pit water gushing point

Abstract

The invention discloses a pit inflow point static waterhead height measuring device comprising a pressing barrel and a measuring pipe. The side wall of the pressing barrel is provided with a water discharging hole, slide grooves are formed in the upper and lower ends of the water discharging hole of the inner wall of the pressing barrel, a sliding cover plate capable of sealing the water discharging hole is arranged on the slide grooves, the outer wall of the pressing barrel is provided with a pressing handle, the lower end of the pressing barrel is provided with an opening, the upper end is connected to a connecting pipe, and the diameter of the connecting pipe matches with that of the measuring pipe. The measuring pipe is communicated, the side wall of the measuring pipe is provided with an observing groove fixed to transparent material in a sealed manner, and the transparent material is provided with scale marks. The pit inflow point static waterhead height measuring device is simple and reliable in design principle and can be used at an inflow point directly, and the height of the waterhead can be calculated according to the measured height, and usage is facilitated; structure is simple, and producing cost is low.

Description

technical field [0001] The invention belongs to the field of construction engineering, in particular to a measuring instrument for the height of static water head at the water gushing point of a foundation pit. Background technique [0002] In China's coastal areas along the river, the groundwater level is relatively high. Since large-scale buildings and large-scale underground projects are more common now, foundation pit excavation is required in the construction of underground projects. The groundwater is pressurized water. When the borehole penetrates the aquifer, if the hole is not sealed well, the pressurized water will gushes out through the borehole, affecting the normal excavation of the foundation pit. The treatment measures to be taken depend on the height of the water head at the water inflow point. If the water head is high, measures to reduce the water head are required. If the water head is not too high, measures to balance the water head and seal holes can be ...

AI Technical Summary

Problems solved by technology

[0002] In China's coastal areas along the river, the groundwater level is relatively high. Since large-scale buildings and large-scale underground projects are more common now, foundation pit excavation is required in the construction of underground projects. The groundwater is pressurized water. When the borehole penetrates the water-resistant layer, if the hole is not sealed well, the pressurized water will gushes out through the borehole, affecting the normal excavation of the foundation pit.

The treatment measures to be taken depend on the height of the water head at the water inflow point. If the water head is high, measures to reduce the water head are required. If the water head is not too high, measures to balance the water head and seal holes can be taken. However, since the water is flowing, the water inflow point is located It is difficult to measure the height of the static head at the location, and there is no convenient and accurate instrument for measuring the height of the static head of the water gushing point

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