Soil pressure measuring device

Abstract

The invention provides a soil pressure measuring device which comprises a base, a soil pressure meter and a limiting ring, the base is connected with a rock-soil anchor bolt, the soil pressure meter is connected with the limiting ring in a sleeved mode, and the limiting ring is detachably connected with the base; the limiting ring and the base are transversely clamped, so that transverse limiting of the soil pressure meter is realized; the limiting ring and the soil pressure meter are matched through a key groove to achieve axial sliding and limit relative rotation, so that quick disassembly and quick assembly of the soil pressure meter and the limiting ring and quick disassembly and quick assembly of the limiting ring and the base are achieved. According to the soil pressure measuring device, the mounting and dismounting speed is increased, and the anchoring force is enhanced, so that the measuring continuity and accuracy are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to an earth pressure measuring device. Background Art

[0002] Soil pressure measurement is a core link in geotechnical engineering safety monitoring. By quantifying the force exerted by soil on structures, it provides key data for the design of retaining walls, tunnel supports, etc. Traditional methods mainly rely on vibrating wire or strain gauge earth pressure cells. Their disc-shaped sensors need to be pre-buried or fixed to the surface of the structure by welding / bolts, which have significant defects: first, the installation process is cumbersome and time-consuming, requires precise alignment, and is prone to disturbing the original stress state of the soil; second, during the measurement process, the earth pressure cell is prone to lateral displacement and sliding due to rock and soil vibration, which can easily lead to stress concentration or data distortion due to gaps; third, the existing quick-install structure is easily stuck in the soil in loose or cohesive soil layers, and has poor pull-out stability, which seriously restricts monitoring efficiency and reliability. Summary of the Invention

[0003] In view of this, the present invention aims to provide an earth pressure measuring device to speed up assembly and disassembly, strengthen anchoring force and improve measurement continuity and accuracy.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A soil pressure measuring device includes a base, a soil pressure meter, and a limiting ring. The base is connected to a rock and soil anchor bolt, the soil pressure meter is sleeved with the limiting ring, and the limiting ring is detachably connected to the base.

[0006] The limiting ring and the base are locked horizontally to achieve the lateral limitation of the earth pressure meter;

[0007] The limiting ring and the earth pressure instrument cooperate with each other through a keyway to realize axial sliding and limit relative rotation, so as to realize quick disassembly and quick assembly of the earth pressure instrument and the limiting ring and quick disassembly and quick assembly of the limiting ring and the base.

[0008] A soil pressure measuring device, wherein the side of the soil pressure instrument is provided with a depression, the inner side of the limiting ring is provided with a protrusion, and the protrusion and the depression are embedded and matched to realize axial sliding and limit relative rotation of the limiting ring and the soil pressure instrument.

[0009] A soil pressure measuring device is provided with a plurality of outwardly extending limit blocks on the outer side of the limit ring;

[0010] The base is a square thin plate with a through hole in the center of the thin plate and a plurality of grooves on the upper side wall of the through hole. The grooves match the distribution position of the limit blocks so that the limit ring can pass through the grooves and be embedded in the through hole, thereby achieving horizontal locking of the limit ring and the base.

[0011] A soil pressure measuring device: The lower side wall of the base through hole is provided with a plurality of arc-shaped plates extending inwards, and the arc-shaped plates abut against the limit ring and the soil pressure meter to bear the limit ring and the soil pressure meter.

[0012] A soil pressure measuring device, wherein the groove is arc-shaped, the maximum outer diameter of the limiting ring is smaller than the outer diameter of the groove, but the maximum outer diameter of the limiting ring is smaller than the inner diameter of the arc-shaped plate.

[0013] A soil pressure measuring device, wherein the protrusions of the limit ring are evenly distributed on the outside; the arc plates and grooves of the base are evenly distributed on the inside, and the arc plates and grooves are staggered.

[0014] A soil pressure measuring device, wherein the base, the soil pressure meter and the limit ring are coaxial.

[0015] A soil pressure measuring device is provided with a plurality of countersunk holes on the upper end surface of the base, and the base is connected to the anchor bolts through the countersunk holes.

[0016] Compared with the prior art, the earth pressure measuring device of the present invention has the following beneficial effects:

[0017] (1) In the soil pressure measuring device described in the present invention, the limiting ring and the base are locked in the horizontal direction by the cooperation of the limiting block and the groove. At the same time, the limiting ring and the soil pressure instrument cooperate with each other through the keyway to achieve axial sliding and limit relative rotation. The soil pressure instrument can be quickly installed and disassembled through a simple rotation operation, reducing construction time.

[0018] (2) In the soil pressure measuring device described in the present invention, the limit block of the limit ring is clamped by the protruding extension and the arc plate of the base, and is also supported by the inner wall of the through hole, thereby limiting the axial and lateral movement of the limit ring and the base, effectively preventing the soil pressure meter from sliding axially and laterally during the measurement process, and ensuring the stability of the measurement results;

[0019] (3) In the soil pressure measuring device described in the present invention, the nesting cooperation between the limiting ring and the soil pressure meter can be designed in reverse, that is, a tenon is provided on the limiting ring, and a mortise is provided on the soil pressure meter, thereby increasing the flexibility of the design. By customizing the limiting ring, soil pressure meters of different specifications can be flexibly adapted to meet diverse measurement needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is an exploded isometric diagram of a measuring device according to an embodiment of the present invention;

[0022] Figure 2 This is an axonometric perspective diagram of a base according to an embodiment of the present invention;

[0023] Figure 3 A schematic top view of a measuring device according to an embodiment of the present invention;

[0024] Figure 4 A schematic front cross-sectional view of a measuring device according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic cross-sectional view of the axonometric portion of the measuring device according to an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1-base; 101-groove; 102-arc plate; 103-counterbore; 2-soil pressure gauge; 201-depression; 3-limiting ring; 301-protrusion; 302-limiting block. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] An earth pressure measuring device, such as Figure 1 As shown, the measuring device includes a base 1, an earth pressure meter 2, and a limiting ring 3. The base 1 is connected to the rock and soil anchor bolt, the earth pressure meter 2 is sleeved with the limiting ring 3, and the limiting ring 3 is detachably connected to the base 1; the limiting ring 3 is laterally locked with the base 1 to achieve lateral limitation of the earth pressure meter 2; the limiting ring 3 and the earth pressure meter 2 are matched through keyways to achieve axial sliding and limit relative rotation, so as to realize quick disassembly and assembly of the earth pressure meter 2 and the limiting ring 3, and quick disassembly and assembly of the limiting ring 3 and the base 1.

[0033] In one embodiment, a recess 201 is provided on the side of the earth pressure gauge 2, and a protrusion 301 is provided on the inner side of the limiting ring 3. The protrusion 301 is embedded in the recess 201 to achieve axial sliding and limit relative rotation between the limiting ring 3 and the earth pressure gauge 2. The inner diameter of the limiting ring 3 is clearance-matched with the inner diameter of the earth pressure gauge 2, so that the limiting ring 3 and the earth pressure gauge 2 can be flexibly inserted or removed. The limiting ring 3 is a customized product, and its size should be adapted to the earth pressure gauge 2. By changing the thickness and width of the limiting ring 3, it can be adapted to earth pressure gauges 2 of different specifications. In addition, the nesting fit between the limiting ring 3 and the earth pressure gauge can be reversed, that is, a tenon is provided on the earth pressure ring, and a mortise is provided on the earth pressure gauge 2.

[0034] In one embodiment, Figure 2-Figure 3 As shown, the outer side of the limit ring 3 is provided with a number of limit blocks 302 extending outward; the base 1 is a square thin plate with a through hole in the center of the thin plate, and a number of grooves 101 are provided on the upper side wall of the through hole. The grooves 101 match the distribution of the limit blocks 302, so that the limit ring 3 passes through the grooves 101 and is embedded in the through hole, so that the limit ring 3 and the base 1 are laterally locked. The lower side wall of the through hole of the base 1 is provided with a number of arc-shaped plates 102 extending inward. The arc-shaped plates 102 abut against the limit ring 3 and the earth pressure gauge 2 and are used to receive the limit ring 3 and the earth pressure gauge 2. The groove 101 is arc-shaped, and the maximum outer diameter of the limit ring 3 is smaller than the outer diameter of the groove 101, but the maximum outer diameter of the limit ring 3 is smaller than the inner diameter of the arc-shaped plates 102. The base 1, the earth pressure gauge 2, and the limit ring 3 are coaxial. The protrusions 301 of the limiting ring 3 are evenly distributed on its outer side; the arc-shaped plates 102 and grooves 101 of the base 1 are evenly distributed on its inner side, and the arc-shaped plates 102 and grooves 101 are staggered. In this embodiment, the limiting ring 3 is provided with three evenly distributed limiting blocks 302, and the base 1 is provided with three evenly distributed arc-shaped plates 102 and three evenly distributed grooves 101. The limiting blocks 302, arc-shaped plates 102, and grooves 101 are all distributed in a 120° circle. Figure 4As shown, the groove 101 at the upper part of the through hole of the base 1 and the arc-shaped plate 102 at the lower part directly form a nesting area, and the groove 101 forms a protruding extension. The limit ring 3 can enter the nesting area through the groove 101 and then rotate a certain angle, so that the limit block 302 of the limit ring 3 is limited and clamped by the extension of the base 1 above it and the arc-shaped plate 102 below it, and is supported by the inner wall of the through hole to limit the axial and lateral movement of the limit ring 3 and the base 1, thereby preventing the earth pressure meter 2 from axial and lateral sliding, so as to improve the measurement accuracy.

[0035] In one embodiment, the measuring device is used as follows: Figure 5 As shown, the corresponding size of the limiting ring 3 is selected according to the soil pressure meter 2, the soil pressure meter 2 is sleeved with the limiting ring 3, and the angle of the limiting ring 3 is controlled to pass through the groove 101 of the base 1 and directly reach the arc plate 102, and then the limiting ring 3 is rotated so that the limiting block 302 of the limiting ring 3 is clamped by the protruding extension above the base 1 and the arc plate 102 below, thereby completing the installation of the soil pressure meter 2. If the soil pressure meter 2 is to be removed, the limiting ring 3 can be rotated so that its limiting block 302 is aligned with the groove 101, and the soil pressure meter 2 and the limiting ring 3 can be removed. The advantage is that the base 1 is pre-fixed in the foundation pit to be measured, and the limiting ring 3 is used to quickly install or remove the soil pressure meter 2, and the rock and soil in the nesting area space of the base 1 can be cleared when the limiting ring 3 is rotated. The structure is simple and reliable for long-term use.

[0036] Optionally, a plurality of countersunk holes 103 are provided on the upper end surface of the base 1 , and the base 1 is connected to the anchor bolts through the countersunk holes 103 .

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A soil pressure measuring device, characterized in that: It includes a base, an earth pressure gauge, and a limiting ring. The base is connected to the rock and soil anchor bolts, the earth pressure gauge is sleeved with the limiting ring, and the limiting ring is detachably connected to the base. The limiting ring and the base are locked horizontally to achieve the lateral limitation of the earth pressure meter; The limiting ring and the earth pressure instrument cooperate with each other through a keyway to realize axial sliding and limit relative rotation, so as to realize quick disassembly and quick assembly of the earth pressure instrument and the limiting ring and quick disassembly and quick assembly of the limiting ring and the base.

2. The earth pressure measuring device according to claim 1, characterized in that: A recess is provided on the side of the soil pressure gauge, and a protrusion is provided on the inner side of the limiting ring. The protrusion and the recess are embedded and matched to realize axial sliding and limit relative rotation of the limiting ring and the soil pressure gauge.

3. The earth pressure measuring device according to claim 1, characterized in that: A plurality of outwardly extending limiting blocks are provided on the outer side of the limiting ring; The base is a square thin plate with a through hole in the center of the thin plate and a plurality of grooves on the upper side wall of the through hole. The grooves match the distribution position of the limit blocks so that the limit ring can pass through the grooves and be embedded in the through hole, thereby achieving horizontal locking of the limit ring and the base.

4. The earth pressure measuring device according to claim 3, characterized in that: The lower side wall of the base through-hole is provided with a plurality of arc-shaped plates extending inwardly, and the arc-shaped plates abut against the limit ring and the earth pressure gauge and are used to receive the limit ring and the earth pressure gauge.

5. The earth pressure measuring device according to claim 4, characterized in that: The groove is arc-shaped, and the maximum outer diameter of the limiting ring is smaller than the outer diameter of the groove, but the maximum outer diameter of the limiting ring is smaller than the inner diameter of the arc-shaped plate.

6. The earth pressure measuring device according to claim 4, characterized in that: The protrusions of the limiting ring are evenly distributed on the outside thereof; the arc-shaped plates and the grooves of the base are evenly distributed on the inside thereof, and the arc-shaped plates and the grooves are staggered.

7. The earth pressure measuring device according to claim 1, characterized in that: The base, the soil pressure meter and the limiting ring are coaxial.

8. The earth pressure measuring device according to claim 1, characterized in that: The upper end surface of the base is provided with a plurality of countersunk holes, and the base is connected to the anchor bolts through the countersunk holes.

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