阅读说明：本技术 一种土体分层沉降的监测装置及方法 (Device and method for monitoring layered settlement of soil ) 是由 黄生根 黄启坤 殷鑫 吴明磊 于 2020-05-28 设计创作，主要内容包括：本发明提供一种土体分层沉降的监测装置,包括一体式柔性柱状袋、定位杆、气囊和沉降仪探头,所述柔性柱状袋表面套设固定多个沉降磁环,所述定位杆下端连接所述气囊,所述定位杆用于插入所述柔性柱状袋内,下放所述柔性柱状袋至监测孔内指定位置、以及上提所述气囊挤压所述柔性柱状袋使其紧贴监测孔内壁的被测土层,所述沉降仪探头用于下放入所述柔性柱状袋内监测各所述沉降磁环的位置。本发明的有益效果：柔性柱状袋和土层紧密贴合,随土层同步下沉,解决了现有技术中沉降磁环与沉降管之间摩擦力过大,及沉降磁环与沉降管之间进入杂物而使得沉降磁环不再随土层沉降的问题,保证了土体分层沉降量监测系统的准确性。(The invention provides a monitoring device for layered settlement of soil, which comprises an integrated flexible columnar bag, a positioning rod, an air bag and a settlement meter probe, wherein a plurality of settlement magnetic rings are fixedly sleeved on the surface of the flexible columnar bag, the lower end of the positioning rod is connected with the air bag, the positioning rod is used for being inserted into the flexible columnar bag, the flexible columnar bag is placed to a specified position in a monitoring hole, the air bag is lifted up to extrude the flexible columnar bag to be tightly attached to a soil layer to be detected on the inner wall of the monitoring hole, and the settlement meter probe is used for being placed into the flexible columnar bag downwards to monitor the position of each settlement magnetic ring. The invention has the beneficial effects that: the flexible columnar bag is tightly attached to the soil layer and sinks synchronously with the soil layer, so that the problem that the sedimentation magnetic ring does not sink along with the soil layer due to the fact that friction force between the sedimentation magnetic ring and the sedimentation pipe is too large and impurities enter between the sedimentation magnetic ring and the sedimentation pipe in the prior art is solved, and the accuracy of the soil body layering sedimentation amount monitoring system is guaranteed.)

1. The utility model provides a monitoring devices that soil body layering subsides which characterized in that: the device comprises an integrated flexible columnar bag, a positioning rod, an air bag and a settlement meter probe, wherein a plurality of settlement magnetic rings are fixedly sleeved on the surface of the flexible columnar bag, the lower end of the positioning rod is connected with the air bag, the positioning rod is used for being inserted into the flexible columnar bag, the flexible columnar bag is placed to a specified position in a monitoring hole, the air bag is lifted to extrude the flexible columnar bag to be tightly attached to a measured soil layer on the inner wall of the monitoring hole, and the settlement meter probe is used for being placed into the flexible columnar bag downwards to monitor the positions of the settlement magnetic rings.

2. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: the flexible columnar bag is a flexible pipe body with the bottom closed and the top open.

3. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: the positioning rod is of a hollow tubular structure, an inflation tube is arranged inside the positioning rod, the lower end of the inflation tube is connected with the air bag, and the upper end of the inflation tube extends out of the upper end of the positioning rod and is used for being connected with an external air source.

4. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: the air sac is a sphere or an ellipsoid.

5. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: the flexible cylindrical bag has water permeability.

6. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: and the surface of the flexible columnar bag is provided with a scale strip.

7. A method for monitoring the layered settlement of soil, which comprises the steps of:

s1, selecting a flexible cylindrical bag with proper length according to the depth of the monitoring hole, and sleeving and fixing a plurality of sedimentation magnetic rings on the surface of the flexible cylindrical bag;

s2, sleeving the flexible columnar bag on a positioning rod, inserting the positioning rod into the flexible columnar bag, and putting the flexible columnar bag down to a specified position in the monitoring hole;

s3, inflating the air bag to expand the air bag, lifting the positioning rod to pull the air bag to move upwards, and enabling the air bag to extrude the flexible columnar bag to be tightly attached to the tested soil layer on the inner wall of the monitoring hole;

s4, taking out the positioning rod and placing a settlement meter probe downwards into the flexible columnar bag, wherein the settlement meter probe monitors the distance from each settlement magnetic ring to the air interface of the monitoring hole and calculates the settlement amount of the soil layer to be measured according to the distance.

Technical Field

The invention relates to the technical field of exploration rock-soil buildings, in particular to a monitoring device for layered settlement of soil.

Background

In the soft soil area, the layered settlement of the soil body is generally monitored to judge whether the engineering characteristics of each soil layer meet the design requirements or not, and the layered settlement is used as a basis for controlling the construction progress, determining the loading and unloading time and evaluating the foundation treatment effect. The commonly used method is a magnetic ring type settlement meter method, namely a flexible ruler settlement meter is matched with a settlement pipe and a settlement magnetic ring to monitor the layered settlement amount of the soft soil foundation. The working mode of the magnetic ring type settlement meter method is as follows: fixing a sedimentation magnetic ring on the outer surface of the sedimentation pipe by using a water-soluble adhesive tape in advance, then pre-burying the sedimentation pipe in a soft soil foundation to be detected, arranging a sealing head at the bottom end of the sedimentation pipe to prevent soil from blocking the sedimentation pipe, and tightly sleeving the sedimentation pipe outside to settle along with a soil layer to be detected, wherein the inner diameter of the sedimentation magnetic ring is slightly larger than that of the sedimentation pipe; after the sedimentation pipe and the sedimentation magnetic ring are embedded, the flexible ruler settlement gauge probe is manually placed into the sedimentation pipe, the flexible ruler is controlled to enable the measuring head to slowly move downwards, when the probe reaches the embedding position of the sedimentation magnetic ring in the soil layer, the instrument can generate a buzzer, the distance between the sedimentation magnetic ring and the pipe opening is manually recorded, the height of the sedimentation magnetic ring is obtained by subtracting the measured value of the length from the height of the pipe opening of the sedimentation pipe, the layered settlement amount of each soil layer can be measured by obtaining the height of each sedimentation magnetic ring, the precious position of the sedimentation magnetic ring is recorded in the roadbed construction process, the state of each layer of the roadbed soil body can be monitored, and data are provided for engineering construction.

In the prior art, the inner diameter of the traditional sedimentation magnetic ring is slightly larger than the outer diameter of the sedimentation pipe, and because the traditional sedimentation pipe is tightly contacted with the sedimentation magnetic ring, the traditional sedimentation pipe can generate an upward friction force to the sedimentation magnetic ring in the process that the sedimentation magnetic ring is sedimented along with the soil layer, and the friction force generated by the traditional sedimentation pipe to the sedimentation magnetic ring can cause that the sedimentation magnetic ring can not be sedimented along with the soil body synchronously, so that the measurement result of the layered sedimentation amount of the soil body often has larger error, and the sedimentation amount of the soil layer to be measured can not be reflected accurately in time. And traditional sedimentation pipe is formed by the connection of several sedimentation pipe unit tube, and traditional sedimentation pipe need take over many times burying the in-process underground, not only makes the process of burying underground complicated, work load is big, and sedimentation pipe leakproofness also receives the influence, and silt often pours into and blocks up sedimentation pipe. Therefore, it is necessary to design a method and a device for monitoring layered settlement of a soil body, so that the influence of friction between a settling pipe and a settling magnetic ring can be eliminated, the workload in the burying process can be reduced, and the sealing performance can be ensured.

Disclosure of Invention

The invention aims to solve the problems that friction force between a traditional settling pipe and a settling magnetic ring is large, sundries are easy to enter the settling pipe and block the settling pipe, and the problems that the settling pipe is blocked by mud gushing at a joint and is easy to break in the existing method are solved, and the device for monitoring layered settlement of soil is provided.

The embodiment of the invention provides a monitoring device for layered settlement of soil, which comprises an integrated flexible columnar bag, a positioning rod, an air bag and a settlement meter probe, wherein a plurality of settlement magnetic rings are fixedly sleeved on the surface of the flexible columnar bag, the lower end of the positioning rod is connected with the air bag, the positioning rod is inserted into the flexible columnar bag, the flexible columnar bag is placed to a specified position in a monitoring hole, the air bag is lifted up to press the flexible columnar bag to be tightly attached to a measured soil layer on the inner wall of the monitoring hole, and the settlement meter probe is used for being placed into the flexible columnar bag downwards to monitor the position of each settlement magnetic ring.

Further, the flexible columnar bag is a flexible pipe body with a closed bottom and an open top.

Furthermore, the positioning rod is of a hollow tubular structure, an inflation tube is arranged inside the positioning rod, the lower end of the inflation tube is connected with the air bag, and the upper end of the inflation tube extends out of the upper end of the positioning rod and is used for being connected with an external air source.

Further, the air sac is a sphere or an ellipsoid.

Further, the flexible cylindrical bag has water permeability.

Furthermore, the surface of the flexible columnar bag is provided with a scale strip.

The embodiment of the invention also provides a method for monitoring the layered settlement of the soil body, which uses the device for monitoring the layered settlement of the soil body and comprises the following steps:

s1, selecting a flexible cylindrical bag with proper length according to the depth of the monitoring hole, and sleeving and fixing a plurality of sedimentation magnetic rings on the surface of the flexible cylindrical bag;

s2, sleeving the flexible columnar bag on a positioning rod, inserting the positioning rod into the flexible columnar bag, and putting the flexible columnar bag down to a specified position in the monitoring hole;

s3, inflating the air bag to expand the air bag, lifting the positioning rod to pull the air bag to move upwards, and enabling the air bag to extrude the flexible columnar bag to be tightly attached to the tested soil layer on the inner wall of the monitoring hole;

s4, taking out the positioning rod and placing a settlement meter probe downwards into the flexible columnar bag, wherein the settlement meter probe monitors the distance from each settlement magnetic ring to the air interface of the monitoring hole and calculates the settlement amount of the soil layer to be measured according to the distance.

The technical scheme provided by the embodiment of the invention has the following beneficial effects: according to the monitoring device for soil body layered settlement, the flexible columnar bag is of an integrated structure, the flexible columnar bag is tightly attached to the soil layer and sinks synchronously with the soil layer, the problems that in the prior art, the friction force between the settlement magnetic ring and the settlement pipe is too large, and foreign matters enter between the settlement magnetic ring and the settlement pipe to enable the settlement magnetic ring not to sink along with the soil layer are solved, and the accuracy of a soil body layered settlement amount monitoring system is ensured; secondly, this flexible column bag simple to operate need not splice sedimentation pipe, has simplified the installation procedure to there is better leakproofness, has solved the problem that the sedimentation pipe was blockked up to gush mud in the joint department among the prior art method, because its flexible characteristic, also can not have the problem of rupture, has guaranteed the suitability of soil body layering settlement volume monitoring system.

Drawings

FIG. 1 is a schematic view of the installation state of a flexible columnar bag of a monitoring device for soil layered settlement of the invention;

FIG. 2 is a schematic view of the process of opening the flexible cylindrical bag of the monitoring device for soil layered settlement of the present invention;

FIG. 3 is a schematic view of the monitoring state of the soil layered settlement monitoring device of the invention;

FIG. 4 is a schematic view of the locating rod 2 and air bag 3 of FIG. 1;

fig. 5 is a schematic view of the flexible cylindrical bag 1 of fig. 1.

In the figure: 1-flexible columnar bag, 2-positioning rod, 3-air bag, 4-settlement meter probe, 5-monitoring hole, 6-settlement magnetic ring, 7-inflation tube, 8-ground, 9-external air source and 10-scale bar.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a device for monitoring soil layered settlement, including an integrated flexible columnar bag 1, a positioning rod 2, an air bag 3 and a settlement meter probe 4.

The surface of the flexible columnar bag 1 is fixedly provided with a plurality of sedimentation magnetic rings 6 in a sleeved mode, the lower end of the positioning rod 2 is connected with the air bag 3, the positioning rod 2 is used for being inserted into the flexible columnar bag 1, the flexible columnar bag 1 is placed to a designated position in the monitoring hole 5 and the air bag 3 is lifted up to extrude the flexible columnar bag 1 to be attached to a tested soil layer on the inner wall of the monitoring hole 5, and the sedimentation instrument probe 4 is used for being placed into the flexible columnar bag 1 to monitor the position of each sedimentation magnetic ring 6.

Specifically, the flexible columnar bag 1 is a flexible tube body with a closed bottom and an open top. The flexible columnar bag 1 is generally made of a flexible material with high tensile strength, the interior of the flexible columnar bag 1 is a space for placing the settlement gauge probe 4, in order to prevent accumulated water from existing in the flexible columnar bag 1, the flexible columnar bag 1 is made of a water permeable material, and the flexible columnar bag 1 has water permeability and can block soil particles in soil from entering the flexible columnar bag while water can permeate the flexible columnar bag.

The sedimentation magnetic rings 6 are sleeved on the surface of the flexible columnar bag 1 at intervals, and the distance between the sedimentation magnetic rings 6 is determined according to the layering condition of the tested soil layer. In order to facilitate the installation of the sedimentation magnetic ring 6 at a precise position on the flexible cylindrical bag 1, a scale bar 10 is arranged on the surface of the flexible cylindrical bag 1, and the sedimentation magnetic ring 6 is installed at a preset position by means of the scale bar 10.

The air bag 3 is of a hollow ellipsoid or sphere structure and is made of materials with certain elasticity, and can be expanded after inflation and pressurization, so that the outer wall of the air bag is ensured to be smooth.

The positioning rod 2 is of a hollow tubular structure and is made of materials with high strength, an inflation tube 7 is arranged inside the positioning rod 2, the lower end of the inflation tube 7 is connected with the air bag 3, and the upper end of the inflation tube 7 extends out of the upper end of the positioning rod 2 and is used for being connected with an external air source 9. The external gas source 9 is here a press on the ground 8.

In addition, the embodiment of the invention also provides a method for monitoring the layered settlement of the soil body, which uses the device for monitoring the layered settlement of the soil body and comprises the following steps:

s1, selecting a flexible columnar bag 1 with a proper length according to the depth of the monitoring hole 5, sleeving and fixing a plurality of settlement magnetic rings 6 on the surface of the flexible columnar bag 1, wherein the scale bars 10 on the surface of the flexible columnar bag 1 can be used for fixing the settlement magnetic rings 6, and the distance between the settlement magnetic rings 6 is determined according to the layering condition of the soil layer to be detected and is generally about 3 m.

S2 connects locating lever 2 and gasbag 3, will flexible column bag 1 overlaps on locating lever 2, then locating lever 2 inserts in flexible column bag 1, transfers flexible column bag 1 to the assigned position in the monitoring hole 5, guarantees flexible column bag 1 with all the exposure ground 8 take the altitude in locating lever 2 top.

S3, connecting the air bag 3 with an external air source 9 through the inflation tube 7, inflating the air bag 3 to expand, lifting the positioning rod 2 to pull the air bag 3 to move upwards, extruding the flexible columnar bag 1 by the air bag 3 to enable the flexible columnar bag 1 to be tightly attached to the tested soil layer on the inner wall of the monitoring hole 5, and completely opening the flexible columnar bag 1 by the air bag 3, so that the flexible columnar bag 1 is tightly attached to the tested soil layer, friction and pressure generated by the tested soil layer on the flexible columnar bag 1 during settlement enable the flexible columnar bag 1 to synchronously stretch along with the tested soil layer, and the settlement magnetic ring 6 also synchronously settles along with the tested soil layer.

S4, taking out the positioning rod 2, placing the settlement gauge probe 4 in the flexible columnar bag 1 downwards, lifting the positioning rod 2, and taking out the positioning rod 2 after the air bag 3 leaves the flexible columnar bag 1; when the settlement condition of the soil layer to be measured needs to be measured, the settlement gauge probe 4 is placed downwards into the flexible columnar bag 1, the settlement gauge probe 4 monitors the distance from each settlement magnetic ring 6 to the orifice of the monitoring hole 5, and the settlement amount of each soil layer can be obtained through conversion according to the elevation of the orifice of the monitoring hole and the distance from the settlement magnetic ring 6 to the orifice of the monitoring hole 5.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.