Single-hole multi-point deep soil body vacuum degree monitoring device and method

Abstract

The invention discloses a single-hole multi-point deep soil body vacuum degree monitoring device which comprises at least two vacuum degree measuring pipes, measuring heads are arranged at the lower ends of the vacuum degree measuring pipes, all the vacuum degree measuring pipes are fixed to the outer side of one or a bundle of hard paper pipes, the heights of the measuring heads of all the vacuum degree measuring pipes are different, and the measuring heads of all the vacuum degree measuring pipes are different. An outer opening of each vacuum degree measuring pipe is connected with a vacuum degree monitoring sensor, the vacuum degree monitoring sensors are connected with a data acquisition box, the data acquisition box is provided with a data wireless transmission module, and the data acquisition box and the vacuum degree monitoring sensors are respectively provided with a support. The invention further discloses a single-hole multi-point deep soil body vacuum degree monitoring method adopting the single-hole multi-point deep soil body vacuum degree monitoring device. According to the invention, the vacuum degree data of the deep soil body can be accurately measured. The structure is simple and the use is convenient; and the data acquisition equipment can be reused, is easy to maintain, and is low in long-term use cost and maintenance cost.

Description

technical field [0001] The invention belongs to the technical field of vacuum preloading foundation treatment construction monitoring, and particularly relates to a single-hole multi-point deep soil vacuum degree monitoring device and method. Background technique [0002] Vacuum degree is an item that must be monitored for vacuum preloading or vacuum combined stacking preloading foundation treatment construction, especially the vacuum degree of deep soil has a direct impact on the treatment effect. The failure of the vacuum degree of the deep soil will lead to poor drainage of the soil, and the effective stress in the soil will increase slowly, making it difficult to stabilize the settlement rate in the later stage, and the bearing capacity cannot reach the design target, which seriously affects the treatment effect of vacuum preloaded foundation. [0003] At present, there are mainly two types of devices and methods for soil vacuum measurement: [0004] 1) The vacuum degre...

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Problems solved by technology

The disadvantages of this method are: 1) the depth of the measuring head is not easy to control, 2) after the drainage board is driven into the soil, the thickness of the drainage board increases due to the vacuum tube inside, and it is easy to cause bandback and vacuum tube when the plug-in machine pulls out the tube. Due to problems such as pipe blockage, the degree of vacuum cannot be measured in the end.

This embedding method is limited by the embedding method, it is difficult to bury the measuring head in the deep soil, and it is impossible to measure the vacuum degree of the deep soil

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