Installation device and method for piezometer for underground space of rock mass
A technology of underground space and installation device, which is applied in the directions of measuring device, measuring fluid pressure, and surveying of basic soil on site, etc., can solve the problems of laborious and time-consuming plugging of orifices, difficulty in filling fine sand, etc., so as to reduce the difficulty of on-site construction, The effect of increasing the ability to be protected from external force and having a simple structure
Active Publication Date: 2019-01-11
HOHAI UNIV
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Problems solved by technology
[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a pore piezometer installation device for the underground space of the rock mass. During the process, it is difficult to fill fine sand, and it is labor-intensive and time-consuming to seal the orifice
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[0027] Such as figure 1 As shown, the pore piezometer installation device for the underground space of rock mass provided by the embodiment of the present invention includes an upper fixed head 1, an outer cylinder 2, a fixed plate 3, flat head bolts 4, steel wire mesh 5, geotextile 6, holes Pressure gauge 7, fine sand 8, hexagonal fixing bolt with hole 9, sealing rubber pad 10, lower fixing head 11, waterproof rubber ring 12, end sealing rubber 13, monitoring wire 14, upper fixing head 1 and lower fixing head 11 are connected by fixing plates 3 and flat head bolts 4, and form an internal internal frame. Inside the internal internal frame, steel wire mesh 5, geotextile 6, fine sand 8 and pore pressure gauge 7 are distributed sequentially from outside to inside, such as figure 2 As shown, the steel wire mesh 5 is close to the fixed plate 3, the geotextile 6 is close to the steel mesh 5, the piezometer 7 is located in the middle of the entire internal frame, and the geotextile ...
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The invention discloses a device for mounting a pore pressure gauge for use in underground rock mass space. The device mainly comprises an outer barrel for fixing a pore pressure gauge, upper and lower fixed heads, a plurality of fixing plates, plugging rubber for the purpose of plugging, and a waterproof rubber ring. The upper and lower fixed heads are fixed using the fixing plates to form an inner frame. The pore pressure gauge is placed in the middle within the inner frame which is also packed with a steel wire gauze, geotechnical cloth, and fine sand. The lower fixed head is in threaded connection with the outer barrel and provided with the waterproof rubber ring. An expandable opening is provided in the upper end of the outer barrel, while the plugging rubber is provided at the lower end of the same. The device for mounting a pore pressure gauge for use in underground rock mass space solves the problems of great difficulty in mounting a top pore pressure gauge in underground rock mass space and poor construction quality, and has the advantages of simple structure, simple and convenient operations, low construction cost, reliable mounting quality, reusability, and the like.
Description
technical field [0001] The invention relates to the field of pore water pressure monitoring of rock and soil groundwater, in particular to a device for quickly installing a pore piezometer at the vault and corners of the vault in the underground space of the rock mass. Background technique [0002] Pore piezometer, also often called osmometer, is a special instrument used to measure pore water pressure or osmotic pressure in rock and soil. The measured pore water pressure is used to analyze the movement of pore water in rock and soil to control the construction speed and ensure construction safety. Generally, burying the piezometer in the surrounding rock of the underground cavern needs to be buried in a horizontal shallow hole, and at the same time, fine sand should be filled in the bottom of the hole, the piezometer should be buried in the fine sand, and the hole should be sealed with a cover plate, and then Seal it with cement mortar, and fill it with concrete after th...
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IPC IPC(8): E02D1/02G01L11/00
CPCE02D1/027G01L11/00
Inventor 牛玉龙王媛于可
Owner HOHAI UNIV