CN113481956B - A kind of auxiliary device for deep positioning and burying of earth pressure cell - Google Patents

Abstract

The invention discloses an auxiliary device for deep positioning and burying of an earth pressure cell, which relates to the fields of geotechnical and hydraulic engineering. The auxiliary device includes: a casing and a jacking device, the casing can be connected with the probe rod in the static penetration test, so as to penetrate the casing to the buried depth by means of the static penetration test device, and the interior of the casing is provided There is an accommodating space; the accommodating space is used for placing an earth pressure cell and a jacking device; the jacking device can drive the earth pressure cell to move in a horizontal direction, and push the earth pressure cell to the outside the housing. The invention simply realizes the deep positioning and burying of the earth pressure cell, utilizes the existing static penetration test device, does not need complicated operation processes such as digging holes, less disturbance to the in-situ soil, simple operation and high installation rate.

Description

A kind of auxiliary device for deep positioning and burying of earth pressure cell

technical field

The invention relates to the field of geotechnical and hydraulic engineering, in particular to an auxiliary device for deep positioning and burying of an earth pressure cell.

Background technique

The earth pressure cell is an interface type earth pressure sensor used to measure the vertical pressure of different media contact surfaces (interfaces), and a soil-in-soil type pressure sensor used to measure the internal pressure change of the soil itself; it is suitable for long-term measurement of roadbeds, slopes, Compressive stress of soil inside structures such as dams, tunnels, and earth embankments.

In the practice of geotechnical engineering construction and monitoring, earth pressure sensors are often embedded in the soil to monitor the earth pressure inside the soil, and the required data can be obtained through the corresponding data acquisition equipment. The drilling method is a commonly used method for burying the earth pressure box in the deep soil, that is, the mud wall is drilled in the soil first, and the earth pressure sensor is fixed on the customized thin-walled channel steel or steel cage, and then the earth pressure is fixed. The sensor is embedded in the borehole at a specified depth along with the thin-walled channel steel or steel cage, and then backfills fine sand in the borehole. After the fine sand is consolidated, the earth pressure test is carried out.

However, the above-mentioned method has high economical and time cost, unsuitable operation and low installation efficiency.

SUMMARY OF THE INVENTION

(1) Technical problems solved

In view of the deficiencies of the prior art, the present invention provides an auxiliary device for deep positioning and burying of an earth pressure cell, which solves at least one technical problem proposed in the background art.

(2) Technical solutions

In order to achieve the above purpose, the technical solution adopted in the present invention is: an auxiliary device for deep positioning and burying of an earth pressure cell, and the auxiliary device includes:

a housing, which can be connected with the static penetration probe rod, and an accommodating space is arranged in the housing; the accommodating space is used for placing the earth pressure cell and the jacking device;

a jacking device, which can drive the earth pressure cell to move in a horizontal direction and push the earth pressure cell out of the casing;

One side of the casing is provided with an opening, and the upper and lower positions of the opening are provided with sliding grooves on the wall of the casing;

A valve is slidably arranged in the chute, and one end of the valve is connected with an inner end of the chute away from the opening through an elastic member.

Preferably, the inside of the casing is hollow, and one end of the casing is connected to one end of the upper static probe rod; the other end is connected to one end of the lower static probe rod.

Preferably, an auxiliary force transmission unit is provided at a position of the valve close to the opening, and the auxiliary force transmission unit is used to assist the valve to slide toward the inside of the chute.

Preferably, the jacking device includes:

A jacking piece, which can move in a horizontal direction, and pushes the earth pressure box to the outside of the static penetration probe.

Preferably, the jacking device further comprises:

a driving unit, which drives the jacking member to move in a horizontal direction, and the driving unit includes:

motor;

a rotating gear, the rotating gear is connected with the output shaft of the motor;

a transmission gear that meshes with the rotating gear;

Wherein, the jacking piece penetrates through the transmission gear and is threadedly connected with the transmission gear; one end of the jacking piece corresponds to the earth pressure box.

Preferably, the outer surface of the earth pressure cell is wrapped with frozen soil.

Preferably, the width of one side of the frozen soil is continuously decreasing.

Preferably, the method for wrapping the earth pressure cell in the frozen soil is:

The earth pressure box is pre-buried in the auxiliary shaping device filled with fine sand and water, and the auxiliary device is placed in the refrigerator to freeze, and the saturated fine sand freezes into frozen soil in a hard state.

(3) Beneficial effects

The invention provides an auxiliary device for deep positioning and burying of an earth pressure cell, which has the following beneficial effects compared with the prior art:

The invention simply realizes the deep burial of the earth pressure cell, utilizes the existing static penetration test device, does not need complicated operation processes such as digging holes, less disturbance to the in-situ soil, simple operation and high installation rate.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

Fig. 1 is a schematic diagram of an auxiliary device for deep positioning and burying of an earth pressure cell;

Figure 2 is a schematic diagram of the earth pressure cell and the frozen soil structure;

Figure 3 is a plan view of an auxiliary device for deep positioning and embedding of the earth pressure cell;

Figure 4 is a schematic view of the shell structure;

Figure 5 is a schematic diagram of a motor, a transmission gear and a jacking piece.

Among them, 1. Earth pressure box, 2. Frozen soil, 3. Shell, 4. Threaded protrusion, 5. Threaded casing, 6. Push plate, 701. Upper static penetration probe, 702, Lower static Touch probe rod, 8, motor, 9, rotating gear, 10, transmission gear, 11, fixed sliding ring, 12, link rod, 13 jacking piece, 14, threaded hole, 15, auxiliary force transmission unit, 16, Chute, 17, valve, 18, spring snap, 19, snap groove, 20, earth pressure box line, 21, earth pressure box line, 22, elastic parts.

Specific implementation method

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention provides an auxiliary device for deep positioning and burying of an earth pressure cell, as shown in Figures 1-5 below, the auxiliary device for deep positioning and burying of an earth pressure cell includes a casing 3 and a jacking device. There is an accommodating space; the accommodating space is used to place the earth pressure cell 1 and the jacking device; the jacking device can drive the earth pressure cell to move in the horizontal direction, and push the earth pressure cell 1 to the outside the static penetration probe.

During the use process of the embodiment of the present invention, the casing 3 is connected with the existing conventional static penetration probe, the static penetration probe is used to push the casing 3 into the deep soil, and then the jacking device is used to push the casing 3 into the deep soil. The earth pressure cell 1 is pushed from the casing 3 into the soil body. It does not require complicated operations such as digging holes to achieve deep soil access. In the embodiment of the present invention, the horizontal direction is substantially the direction perpendicular to the static penetration probe when the static penetration probe is vertically inserted into the rock and soil.

Specifically, the earth pressure cell 1 is extruded into the soil body together with the static penetration probe, and then the earth pressure cell 1 is extruded into the soil mass through the jacking device to realize the deep burial of the earth pressure cell 1. The present invention The deep positioning and burying of the earth pressure cell is easily realized, and the existing static penetration test device is used, no complicated operation process such as digging holes is required, less disturbance to the in-situ soil, simple operation and high installation rate.

In an embodiment, as shown in FIG. 4 , the interior of the casing 3 is hollow, that is, the earth pressure cell 1 is placed inside the casing 3; the static penetration probe includes an upper static penetration probe. A probe rod 701 and a lower static probe rod 702, one end of the casing 3 is connected to one end of the upper static probe rod 701; the other end of the casing 3 is connected to the lower One end of the static penetration probe rod 702 is connected. That is, the conventional static probe rods are arranged in sections, and then the housing 3 is disposed between the upper static probe rod 701 and the lower static probe rod 702 .

In the above-mentioned embodiment, in the specific implementation process, in order to facilitate installation and disassembly, the specific housing 3 can adopt a cylindrical structure, and can be connected with the upper static probe rod 701 and the lower static probe rod 702 through threads respectively. For example, a threaded protrusion 4 and a threaded sleeve 5 are arranged at one end of the housing 3, and the connection with the upper and lower static probe rods is realized through the threaded protrusion 4 and the threaded sleeve 5.

In one embodiment, as shown in FIG. 4 , one side of the casing 3 is provided with an opening, and the upper and lower positions of the opening are provided with chute 16 on the wall of the casing 3;

A valve 17 is slidably disposed in the chute 16 , and one end of the valve 17 is connected with the inner end of the chute 16 away from the opening through an elastic member 22 . The specific elastic member 22 can be a spring.

In the above-mentioned embodiment, the casing 3 is substantially opened, and a pair of valves are set at the opening position. Specifically, when the elastic member 22 is in a free state, the two oppositely arranged valves 17 can close the opening. When the elastic member 22 Compression can open the opposite valve 17, thereby pushing the earth pressure cell 1 out.

In one embodiment, an auxiliary force transmission unit 15 is provided at a position of the valve 17 close to the opening, and the auxiliary force transmission unit 15 is used to assist the valve 17 to slide toward the inside of the chute 16 .

When the jacking device drives the earth pressure box 1 to move in the horizontal direction, the earth pressure box 1 will first squeeze the valve 17, and then move the two oppositely arranged valves 17 to both ends, and then open, and continue to push The earth pressure box 1 can push the earth pressure box 1 into the rock and soil. At this time, the purpose of the auxiliary force transmission unit 15 is to improve the efficiency of squeezing the valve 17. Specifically, an inclined chamfer can be provided at the end of the valve 17, and the two oppositely arranged valves 17 just form a V at the contact position. When the earth pressure cell 1 squeezes the valve 17, it can quickly separate the two oppositely arranged valves 17, and drive the two valves 17 to move in the direction of separation. At the same time, a triangular spacer block can also be arranged on the inner side of the valve 17, and a V-shaped separation effect can be achieved by two inclined spacer blocks. In this way, the automatic opening of the opening can be known, and it is convenient to push the earth pressure cell 1 into the soil body.

In one embodiment, the jacking device includes a jacking member 13, and the jacking member 13 can move in a horizontal direction and push the earth pressure cell 1 out of the static probe rod.

Specifically, a push plate 6 may also be provided at the end of the jacking member 13 close to the earth pressure cell 1 to increase the contact area between the jacking member 13 and the earth pressure cell 1 and improve the pushing effect.

In one embodiment, the jacking device further includes a drive unit, the drive unit includes a motor 8, a rotating gear 9 and a transmission gear 10, the rotating gear 9 is connected with the output shaft of the motor 8, and the transmission gear 10 meshes with the rotating gear 9; the driving unit is used to drive the jacking member 13 to move in the horizontal direction;

The jacking member 13 penetrates through the transmission gear 10 and is threadedly connected with the transmission gear 10 ; one end of the jacking member 13 corresponds to the earth pressure cell 1 . Specifically, the ejector 13 may be a screw rod, or other structures capable of realizing horizontal movement through threaded connection.

Specifically, the motor 8 drives the rotating gear 9 to rotate, and the transmission gear 10 rotates around the central axis of the transmission gear. When the transmission gear 10 and the transmission gear 10 are in a fixed state, the movement of the jacking piece 13 can be driven by the threaded connection, thereby realizing To drive the earth pressure cell 1 to move. The above-mentioned motor 8 can be started by remote control.

Specifically, a fixed slip ring 11 can be arranged inside the transmission gear 10, and the fixed slip ring 11 is fixed above the motor 8 through the connecting rod 12, so that the transmission gear 10 can be freely freed in the fixed slip ring 11 (including glass slip balls). Rotating, the jacking member 13 passes through the threaded hole 14 in the center of the transmission gear 10, and the rotating gear 9 can drive the jacking member 13 to move to the left gradually through the thread action, and then drive the earth pressure cell 1 to move.

Further, in order to keep the valve 17 in an open state when the valve 17 is opened, a snap groove 19 is provided on the inner side wall of the chute 16 , and a spring snap 18 is provided on one side of the valve 17 . When the valve 17 is opened, the spring buckle 18 moves to the buckle groove 19, and the spring buckle 18 will enter the buckle groove 19 under the action of the spring force to realize the fixation of the valve 17, thereby making the valve 17 open. state.

In one embodiment, as shown in FIG. 2 , the outer surface of the earth pressure box 1 is wrapped with frozen soil 2 , and the earth pressure box 1 can be protected by the frozen soil 2 . 2 It can promote the difficulty of extruding the earth pressure cell into deep hard soil.

In one embodiment, as shown in FIG. 2 , the width of one side of the frozen soil 2 is continuously decreasing. Specifically, the side of the frozen soil 2 close to the opening is set to be sharp, which is convenient for the earth pressure box. Squeeze into deep hard soil.

In one embodiment, the method for wrapping the earth pressure cell 1 by the frozen soil 2 is:

The earth pressure box 1 is pre-buried in an auxiliary shaping device filled with fine sand and water, and the auxiliary device is placed in a refrigerator to freeze, and the saturated fine sand freezes into frozen soil 2 in a hard state. The auxiliary shaping device is a mold, which can freeze the frozen soil 2 into a predetermined shape structure.

In the above embodiment, since the earth pressure cell 1 is flat, it is difficult to squeeze into the deep hard soil, and the earth pressure cell 1 should be wrapped by fine sand particles, so as not to affect the measurement accuracy in the deep unknown stratum; therefore The earth pressure cell 1 is pre-wrapped in saturated fine sand or fine clay, and shaped into a predetermined shape, such as a cone, by a freezing method. The conical frozen soil can be easily squeezed into the deep soil; in addition, after the saturated frozen soil is thawed, the earth pressure box 1 is directly wrapped to avoid the problem that the earth pressure box 1 contacts with large-sized soil particles and affects the measurement accuracy.

In the embodiment of the present invention, the permafrost 2 including the earth pressure box 1 is gradually pushed to the left by the jacking member 13; initially, the valve 17 is in a closed state under the elastic force of the elastic member 22, and during the pushing process, the permafrost 2 first contacts with The auxiliary force transmission unit 15 with parallel permafrost cones, the auxiliary force transmission unit 15 can effectively promote the downward and upward movement of the valve 17 in the chute 16, so that the horizontal thrust of the frozen soil 2 can be converted into a vertical force acting on the valve 17. When the valve 17 is fully opened, the spring buckle 18 moves to the buckle groove 19, and the spring buckle 18 will enter the buckle groove under the action of the spring force. In the groove 19, the valve is fixed in the open state, and the frozen soil 2 wrapped with the earth pressure box 1 can be smoothly squeezed into the soil. Then, the motor can be controlled to rotate in the reverse direction, the jacking piece 13 can be retracted, the static penetration probe can be pulled out, and the earth pressure box can be smoothly positioned and buried in the deep soil.

Compared with the existing deep soil earth pressure cell burying method, the method is too complicated, the time and economic cost are high, the operation is inconvenient, and the installation efficiency is low. In addition, on the basis of the existing static penetration test device in the embodiment of the present invention, the earth pressure cell 1 is pressed into the deep soil body by the static penetration probe, and the inner earth pressure cell is pressed by the jacking device. 1 Extruded into the soil, it is more convenient to realize the deep positioning and burying of the earth pressure cell, and also realize the secondary development and utilization of the existing equipment.

In addition, if the earth pressure cell 1 is used as a wired earth pressure cell, an earth pressure cell line inlet 20 is set on the outer edge of the shell 3 to separate the earth pressure cell line 21 from the static penetration probe by a certain distance, so as to avoid In the process of pulling out the static penetration probe, the earth pressure box line is driven, causing disturbance to the earth pressure box 1; the earth pressure box line reverse 20 is affected by the soil resistance during the pressing process and is horizontal, making the earth pressure box line There is a certain distance from the probe rod; the earth pressure box line inverted port 20 is vertical when pulled out, and the distance from the earth pressure box line becomes smaller, and the probe rod extraction process will not disturb the earth pressure cell 1 . As shown in Figure 3 below, the earth pressure box line invert 20 can be a right-angled triangle structure, or other structures, the purpose is to separate the earth pressure box line and the static probe rod, and increase the earth pressure box line and the static force. The distance of the touch probe.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. An auxiliary device is buried underground in deep location of soil pressure cell, auxiliary device includes:

the static sounding probe comprises a shell (3), wherein the shell (3) can be connected with a static sounding probe rod, and an accommodating space is formed in the shell; the accommodating space is used for accommodating the soil pressure box (1) and the jacking device;

the jacking device can drive the soil pressure cell to move along the horizontal direction and drive the soil pressure cell to move

(1) Push out to outside the casing (3), its characterized in that:

an opening is formed in one side of the shell (3), and sliding grooves (16) are formed in the wall of the shell (3) at the upper portion and the lower portion of the opening;

a valve (17) is arranged in the sliding groove (16) in a sliding manner, and one end part of the valve (17) is connected with the end part, far away from the opening, in the sliding groove (16) through an elastic part (22);

an auxiliary force transmission unit (15) is arranged at a position, close to the opening, of the valve (17), and the auxiliary force transmission unit (15) is used for assisting the valve (17) to slide towards the inside of the sliding groove (16);

the outer surface of the soil pressure box (1) is wrapped with frozen soil (2);

the inner side wall of the sliding groove (16) is provided with a buckling groove (19), one side of the valve (17) is provided with a spring buckle (18), and when the spring buckle (18) moves to the position corresponding to the buckling groove (19) along with the valve (17), the spring buckle (18) can enter the buckling groove (19) under the action of spring force.

2. The deep positioning and burying auxiliary device for soil pressure cell as claimed in claim 1, wherein: the interior of the shell (3) is hollow, and one end of the shell (3) is connected with one end of the upper static sounding probe rod (701); the other end is connected with one end of the lower static sounding probe rod (702).

3. The deep positioning and burying auxiliary device for soil pressure cell as claimed in claim 1, wherein: the jacking device comprises:

the jacking piece (13) can move along the horizontal direction and push the soil pressure box (1) out of the static sounding rod.

4. The deep positioning and burying auxiliary device for soil pressure cell as claimed in claim 3, wherein: the jacking device further comprises:

a driving unit driving the knock-in member (13) to move in a horizontal direction, the driving unit including: a motor (8);

the rotating gear (9), the said rotating gear (9) is connected with output shaft of the said electrical machinery (8); a transmission gear (10), the transmission gear (10) being engaged with the rotating gear (9);

the jacking piece (13) penetrates through the transmission gear (10) and is in threaded connection with the transmission gear (10); one end part of the jacking piece (13) corresponds to the soil pressure box (1).

5. The deep positioning and burying auxiliary device for soil pressure cell as claimed in claim 1, wherein: the width of one side of the frozen soil (2) is continuously decreased progressively.

6. The deep positioning and burying auxiliary device for the soil pressure box as claimed in claim 5, wherein: the preparation method for wrapping the soil pressure box (1) by the frozen soil (2) comprises the following steps:

the soil pressure box (1) is pre-buried in an auxiliary shaping device filled with fine sand and water, the auxiliary device is placed in a refrigerator for freezing, and the saturated fine sand is frozen into frozen soil (2) in a hard state.

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