Soft soil foundation anti-disturbance test device

Abstract

The present invention provides a soft soil foundation anti-disturbance test device, wherein the lower end of the outer sleeve is threadedly connected to the anchor head, the upper end of the outer sleeve is detachably connected to the upper end of the inner sleeve, the outer periphery of the sliding sleeve can slide axially along the side wall of the inner sleeve, the outer periphery of the screw assembly is threadedly connected to the inner ring of the lower end of the inner sleeve, the outer periphery of the top expansion block abuts against the inner ring of the anchor head, the side wall of the inner sleeve is provided with a plurality of mounting holes, a detection assembly is arranged in each mounting hole, one end of the detection assembly is located in the inner ring of the outer sleeve, and the other end of the detection assembly is contact-connected to the outer periphery of the sliding sleeve. The soft soil foundation anti-disturbance test device of the present invention can observe the anti-disturbance deformation of soft soil foundations at different depths by arranging a plurality of detection assemblies axially on the inner sleeve, and a plurality of the above-mentioned test devices can also be arranged side by side on the soft soil foundation, so as to observe the disturbance amount of the soft soil foundation under the construction state of planting piles into the soft soil foundation, so as to ensure the construction safety of the subsequent process.

Description

Technical Field

[0001] The invention belongs to the field of soft soil foundation pit construction, and in particular relates to a soft soil foundation anti-disturbance testing device. Background Art

[0002] When supporting soft soil foundations, the existing technology uses support piles combined with internal support structures or underground continuous wall structures due to the large horizontal pressure of the soft soil foundation itself. The strength of the foundation pit support not only needs to ensure the horizontal pressure of the foundation, but also needs to meet the disturbance pressure of the soft soil foundation affected by the construction. At present, the geological conditions in different places are different, and the disturbance and creep data of different soft soil foundations are different. When facing the support of soft soil foundations, the height and width of the support are usually set by experience. The human factor is large, the construction quality is uncontrollable, and there are safety hazards in the construction. Summary of the invention

[0003] In view of this, the present invention aims to propose a soft soil foundation anti-disturbance testing device to solve the problem that in the prior art, when constructing soft soil foundations near rivers, seas, etc., there is disturbance to the soft soil foundation pit support, and the disturbance data is unmeasurable and usually set through human experience, which has a large human factor and poses a safety hazard.

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

[0005] A soft soil foundation anti-disturbance testing device comprises a screw assembly and a sliding sleeve, an inner sleeve and an outer sleeve arranged in sequence from the inside to the outside on its periphery, the lower end of the outer sleeve is threadedly connected to an anchor head, the upper end of the outer sleeve is detachably connected to the upper end of the inner sleeve, the periphery of the sliding sleeve can slide axially along the side wall of the inner sleeve, the periphery of the screw assembly is threadedly connected to the inner ring of the lower end of the inner sleeve, and a top expansion block is arranged at one end of the screw assembly, the periphery of the top expansion block abuts against the inner ring of the anchor head, the side wall of the inner sleeve is provided with a plurality of mounting holes, a detection assembly is arranged in each mounting hole, one end of the detection assembly is located at the inner ring of the outer sleeve, and the other end of the detection assembly is in contact with and connected to the periphery of the sliding sleeve.

[0006] Furthermore, the screw assembly includes a screw body, a top expansion block is installed at the lower end of the screw body, the outer periphery of the screw body is threadedly connected to the lower inner ring of the inner sleeve, a sliding shaft is installed at the upper end of the screw body, the sliding shaft is located in the inner ring of the sleeve, a clamping assembly is arranged on the side wall of the sliding shaft, the clamping assembly does not interfere with the axial downward displacement of the sliding shaft, the upper end of the clamping assembly can be clamped to the lower end of the sleeve, and a handwheel is arranged on the upper end of the sliding shaft.

[0007] Furthermore, the clamping assembly includes a first spring, a clamping plate is arranged at one end of the first spring, a first blind groove is arranged on the periphery of the sliding shaft, the other end of the first spring is fixedly connected to the bottom of the first blind groove, and the periphery of the clamping plate is slidably connected to the first blind groove, a wedge-shaped slope is arranged on the lower side of the clamping plate, the lower inner ring of the sliding sleeve is fixedly sleeved to the outer ring of the bearing, and the sliding shaft is located on the inner ring of the bearing, and the upper side of the clamping plate can abut against the lower inner ring of the bearing.

[0008] Furthermore, the outer periphery of the lower end of the inner sleeve is located in the inner circle of the anchor head, the upper end side wall of the inner sleeve is circumferentially provided with a plurality of first bolting holes, the upper end of the outer sleeve is provided with a first flange, the first flange can be detachably installed to the second flange, an upper sleeve is provided at the upper end of the second flange, the upper end of the screw assembly and the upper end of the inner sleeve are both located in the upper sleeve, and the side wall of the upper sleeve is circumferentially provided with a plurality of second bolting holes, the first bolting holes and the second bolting holes correspond one to one, and each fixing bolt is located in a first bolting hole and a second bolting hole for fixing the relative position of the upper sleeve and the inner sleeve.

[0009] Furthermore, the inner sleeve side wall is axially provided with a guide rail, the outer periphery of the sliding sleeve is axially provided with a sliding groove, the outer periphery of the guide rail is slidably connected to the sliding sleeve, and the upper end of the sliding sleeve is sleeved with an end cover, and the lower end of the end cover can abut against the upper end of the guide rail.

[0010] Furthermore, the detection assembly includes a strain gauge, which is installed in the installation hole, a ball head is arranged at one end of the strain gauge, and the other end of the strain gauge faces the side wall of the outer sheath, the outer periphery of the ball head is slidably connected to the outer wall of the sliding sleeve, and the sliding sleeve is provided with a wiring groove, and a wiring hole is opened in the middle of the ball head, and the signal line of the strain gauge is connected to the outside in series through the wiring hole and the wiring groove in sequence;

[0011] Further, the periphery of the strain gauge is slidably connected to the periphery of the protective tube, the lower end of the protective tube is an arc-shaped structure, and the periphery of the ball head is fixedly connected to the arc-shaped structure, the periphery of the ball head is fixedly connected to one end of the strain gauge through a second spring, and the periphery of the protective tube is slidably connected to the mounting hole;

[0012] Furthermore, a retaining ring is installed in the mounting hole, the periphery of the protective tube is slidably connected to the inner ring of the retaining ring, a ring platform is arranged on the periphery of the protective tube, and one end of the ring platform is fixedly connected to one end of the retaining ring through a third spring;

[0013] Furthermore, a limiting groove is provided at the lower end of the retaining ring, a limiting rod is provided on the periphery of the strain gauge, the periphery of the limiting rod is slidably connected to the limiting groove, and the periphery of the limiting rod can abut against one end of the third spring.

[0014] Furthermore, a plurality of release ring grooves are provided on the outer periphery of the sliding sleeve along the axial direction, and each detection component releases the execution end through the release ring groove;

[0015] Furthermore, the screw assembly can drive the sliding sleeve to move upward relative to the inner sleeve, and the sliding sleeve that moves upward can release the movement of the arc structure and the ball head of the ring groove relative to the protective tube, and the arc structure of the protective tube moves toward the axis of the sliding sleeve through the third spring, and the displaced protective tube can release the strain gauge to the outside of the inner sleeve;

[0016] The two side walls of the release ring groove are slopes;

[0017] Furthermore, the two side walls of the release chute are slopes.

[0018] Furthermore, the anchor head includes a first tube body and a conical head, the outer periphery of the first tube body is threadedly connected to the inner ring of the outer sleeve, the lower end periphery of the inner sleeve is located in the inner ring of the first tube body, the lower end of the first tube body is fixedly connected to the conical head, and a conical groove is provided in the conical head, and an opening is provided circumferentially on the outer periphery of the conical head, the outer periphery of the top expansion block is a frustum structure, and the outer periphery of the top expansion block abuts against the conical groove, and the screw assembly can drive the top expansion block to sink along the axial direction of the screw assembly, and the sinking top expansion block is the expanded diameter structure of the conical head.

[0019] Furthermore, a polygonal handle is sleeved on the outer wall of the outer sleeve.

[0020] Compared with the prior art, the soft soil foundation anti-disturbance testing device of the present invention has the following beneficial effects:

[0021] (1) In the soft soil foundation anti-disturbance testing device described in the present invention, a worker lowers an inner sleeve and a detection assembly into the soft soil foundation together with the protection of an outer sleeve. During the lowering process, the outer sleeve and the inner sleeve are guided by an anchor head so that they can be better sunk into the soft soil foundation. The anchor head can be expanded by a top expansion block to ensure that the anchor head remains stationary in the soft soil foundation. The outer sleeve and the anchor head are disassembled to facilitate the removal of the outer sleeve, and the inner sleeve and the detection assembly are released into the soft soil foundation. The creep of the soft soil foundation in a natural state and the creep of the soft soil foundation in a disturbed state are detected by the detection assembly.

[0022] (2) The soft soil foundation anti-disturbance test device described in the present invention can observe the anti-disturbance deformation of soft soil foundations at different depths by arranging multiple detection components along the axial direction on the inner sleeve. It can also arrange multiple such test devices side by side on the soft soil foundation to observe the disturbance amount of the soft soil foundation under the construction state of driving piles into the soft soil foundation, so as to ensure the construction safety of the subsequent process.

[0023] (3) In the soft soil foundation anti-disturbance test device described in the present invention, the clamping assembly is used to connect the sliding shaft and the sliding sleeve. When the sliding shaft sinks with the screw body, the clamping assembly does not interfere with the sinking of the sliding shaft, and at this time the clamping assembly sinks synchronously in the sliding sleeve. When the sliding shaft rises with the screw body, the clamping assembly abuts against the lower end of the sliding sleeve, forcing the sliding sleeve to rise synchronously with the sliding shaft to facilitate the subsequent operation.

[0024] (4) In the soft soil foundation anti-disturbance test device described in the present invention, the upper side of the clamping plate can abut against the lower inner ring of the bearing. The bearing is used to ensure that the sleeve does not interfere with the rotation of the sliding shaft when it does not rotate, so as to prevent the staff from turning the hand wheel smoothly. A wedge-shaped slope is set on the lower side of the clamping plate to avoid interfering with the axial sliding of the sliding shaft when the lower side of the clamping plate abuts against the upper end of the bearing when the sliding shaft sinks. The clamping plate is elastically arranged by the first spring so that the clamping plate can be clamped to the lower end of the bearing in time.

[0025] (5) The soft soil foundation anti-disturbance test device described in the present invention, when the test device is sunk into the soft soil foundation, the lower end of the outer sheath is connected to the anchor head, and the upper end of the outer sheath is connected to the inner sheath to ensure that the entire device is an integrated structure, and is sunk into the soft soil foundation by static pressure, and an upper sheath is provided at the upper end of the outer sheath, and the upper sheath is mainly used to cover the upper end of the outer sheath to prevent debris from entering the inner sheath and the sliding sleeve, thereby improving the reliability of the device.

[0026] (6) In the soft soil foundation anti-disturbance test device described in the present invention, a guide rail arranged in the inner sleeve is used to guide the sliding direction of the sleeve to prevent the sleeve from rotating synchronously with the sliding shaft. An end cover is arranged at the upper end of the sleeve, and the lower end of the end cover can abut against the upper end of the guide rail to prevent the sleeve from moving downward with the sliding shaft or the sleeve from sinking naturally due to gravity.

[0027] (7) The soft soil foundation anti-disturbance test device described in the present invention senses the creep amount under the foundation by means of the strain gauge contacting the soft soil foundation, and a ball head is provided at the end of the strain gauge to reduce the contact with the foundation surface of the outer wall of the sleeve to prevent damage to parts caused by hard scratches. The signal line connected in series in the wiring hole and the wiring groove has a certain degree of elasticity to prevent the signal line from being broken when the strain gauge and the sleeve are displaced relative to each other.

[0028] (8) In the soft soil foundation anti-disturbance test device described in the present invention, the outer periphery of the protective tube is slidably connected to the mounting hole. The protective tube is a protective structure for the strain gauge. When the outer sheath sinks, the strain gauge is located inside the protective tube. When the outer sheath is pulled out, the end of the protective tube contacts the outer sheath to prevent damage to the strain gauge caused by collision.

[0029] (9) In the soft soil foundation anti-disturbance testing device described in the present invention, the screw assembly can drive the sliding sleeve to move upward relative to the inner sleeve. The sliding sleeve that moves upward can release the arc structure and the ball head of the protective tube opposite to the annular groove. The arc structure of the protective tube moves toward the axis of the sliding sleeve through the third spring. The displaced protective tube can release the strain gauge to the outside of the inner sleeve, and the two side walls of the release sliding groove are slopes to slow down the speed of the protective tube moving along the axis and prevent sudden rebound from causing damage to the ball head.

[0030] (10) In the soft soil foundation anti-disturbance test device described in the present invention, the sinking top expansion block is the expansion structure of the conical head. After the top expansion block expands the conical head, the conical head and the first tube body can maintain their relative positions unchanged in the soft soil foundation, so as to facilitate the disassembly of the outer sleeve, and the inner sleeve is not connected to the first tube body. After the test is completed, the inner sleeve, the sliding sleeve and the screw assembly can be pulled out, and the anchor head is left under the foundation. In order to facilitate the rotation or fixation of the outer sleeve, a polygonal handle is mounted on the outer wall of the outer sleeve, and the handle can be held by an external fixing component to facilitate the operation of the outer sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural schematic diagram of the soft soil foundation anti-disturbance testing device according to an embodiment of the present invention;

[0033] Figure 2 It is a cross-sectional schematic diagram of a soft soil foundation anti-disturbance testing device according to an embodiment of the present invention;

[0034] Figure 3 It is a schematic structural diagram of the upper sheath according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the outer sheath, the inner sheath and the lead screw assembly according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the inner sheath and the lead screw assembly according to an embodiment of the present invention;

[0037] Figure 6 It is a structural schematic diagram of the sliding sleeve according to an embodiment of the present invention;

[0038] Figure 7 for Figure 2 A partial enlarged view of middle A;

[0039] Figure 8 It is a structural schematic diagram of a lead screw assembly according to an embodiment of the present invention;

[0040] Fig. 9 for Figure 2 A partial enlarged view of middle C;

[0041] Fig.10 for Figure 2 A partial enlarged view of B in the middle;

[0042] Fig.11 It is a schematic diagram of the structure of the detection component according to an embodiment of the present invention;

[0043] Fig.12 is a cross-sectional schematic diagram of a detection component according to an embodiment of the present invention;

[0044] Fig.13 It is a schematic structural diagram of the anchor head described in an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 1-outer sheath; 11-first flange; 12-handle connection platform; 2-anchor head; 21-first tube body; 22-conical head; 23-opening; 3-inner sheath; 31-guide rail; 4-sliding sleeve; 41-sliding groove; 42-end cover; 43-wiring groove; 44-release ring groove; 45-ramp; 5-screw assembly; 51-screw body; 52-top expansion block; 53-sliding shaft; 54-handwheel; 55-first spring; 56-clamping plate; 57-wedge slope; 58-bearing; 6-upper sleeve; 61-second bolt hole; 62-fixing bolt; 63-second flange; 7-detection component; 71-strain gauge; 72-ball head; 73-wiring hole; 74-protective tube; 75-second spring; 76-retaining ring; 77-ring platform; 78-third spring; 79-limiting groove; 710-limiting rod. DETAILED DESCRIPTION

[0047] 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.

[0048] 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 positions or positional relationships based on the positions 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", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like 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.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0051] like Figure 1-Figure 13As shown, the soft soil foundation anti-disturbance test device comprises a screw assembly 5 and a sliding sleeve 4, an inner sleeve 3 and an outer sleeve 1 which are arranged in sequence from the inside to the outside on its periphery. The lower end of the outer sleeve 1 is threadedly connected to the anchor head 2, and the upper end of the outer sleeve 1 is detachably connected to the upper end of the inner sleeve 3. The periphery of the sliding sleeve 4 can slide axially along the side wall of the inner sleeve 3. The periphery of the screw assembly 5 is threadedly connected to the inner ring of the lower end of the inner sleeve 3, and a top expansion block 52 is arranged at one end of the screw assembly 5, and the periphery of the top expansion block 52 abuts against the inner ring of the anchor head 2. A plurality of mounting holes are arranged on the side wall of the inner sleeve 3, and a detection assembly 7 is arranged in each mounting hole. One end of the detection assembly 7 is located at the inner ring of the outer sleeve 1, and the other end of the detection assembly 7 is contacted and connected to the periphery of the sliding sleeve 4. The staff, protected by the outer sleeve 1, lowers the inner sleeve 3 and the detection assembly 7 together into the soft soil foundation. During the downward process, the anchor head 2 is guided so that the outer sleeve 1 and the inner sleeve 3 can sink better into the soft soil foundation. The anchor head 2 can be expanded by the top expansion block 52 to ensure that the anchor head 2 remains stationary in the soft soil foundation. The outer sleeve 1 and the anchor head 2 are disassembled to facilitate the outer sleeve 1 to be pulled out, and the inner sleeve 3 and the detection component 7 are released into the soft soil foundation. The creep amount of the soft soil foundation in the natural state and the creep amount of the soft soil foundation in the disturbed state are detected by the detection component 7. By arranging multiple detection components 7 axially on the inner sleeve 3, the anti-disturbance deformation amount of the soft soil foundation at different depths can be observed. Multiple of the above-mentioned test devices can also be arranged side by side on the soft soil foundation to observe the disturbance amount of the soft soil foundation under the construction state of planting piles in the soft soil foundation, so as to ensure the construction safety of the subsequent process.

[0052] The screw assembly 5 includes a screw body 51, a top expansion block 52 is installed at the lower end of the screw body 51, the outer periphery of the screw body 51 is threadedly connected to the inner ring of the lower end of the inner sleeve 3, a sliding shaft 53 is installed at the upper end of the screw body 51, the sliding shaft 53 is located in the inner ring of the sliding sleeve 4, a clamping assembly is arranged on the side wall of the sliding shaft 53, the clamping assembly does not interfere with the axial downward displacement of the sliding shaft 53, the upper end of the clamping assembly can be clamped to the lower end of the sliding sleeve 4, a hand wheel 54 is arranged at the upper end of the sliding shaft 53, the clamping assembly is used to connect the sliding shaft 53 and the sliding sleeve 4, when the sliding shaft 53 sinks with the screw body 51, the clamping assembly does not interfere with the sinking of the sliding shaft 53, and at this time the clamping assembly sinks synchronously in the sliding sleeve 4, when the sliding shaft 53 rises with the screw body 51, the clamping assembly abuts against the lower end of the sliding sleeve 4, forcing the sliding sleeve 4 to rise synchronously with the sliding shaft 53 for the latter operation.

[0053] like Fig. 9As shown, the clamping assembly includes a first spring 55, one end of the first spring 55 is provided with a clamping plate 56, the periphery of the sliding shaft 53 is provided with a first blind groove, the other end of the first spring 55 is fixedly connected to the bottom of the first blind groove, and the periphery of the clamping plate 56 is slidably connected to the first blind groove, and a wedge-shaped slope 57 is provided on the lower side of the clamping plate 56, the lower end inner ring of the sliding sleeve 4 is fixedly sleeved to the outer ring of the bearing 58, and the sliding shaft 53 is located at the inner ring of the bearing 58, and the upper side of the clamping plate 56 can abut against the lower end inner ring of the bearing 58, and the bearing 58 is used to ensure that the sliding sleeve 4 does not interfere with the rotation of the sliding shaft 53 when it does not rotate, so as to prevent the staff from turning the hand wheel 54 smoothly, and the wedge-shaped slope 57 is provided on the lower side of the clamping plate 56 to avoid that when the sliding shaft 53 sinks, the lower side of the clamping plate 56 abuts against the upper end of the bearing 58 without interfering with the axial sliding of the sliding shaft 53, and the clamping plate 56 is elastically provided by the first spring 55 so that the clamping plate 56 can be clamped to the lower end of the bearing 58 in time.

[0054] The outer periphery of the lower end of the inner sleeve 3 is located in the inner circle of the anchor head 2, and the upper end side wall of the inner sleeve 3 is provided with a plurality of first bolt holes along the circumferential direction. The upper end of the outer sleeve 1 is provided with a first flange 11, and the first flange 11 can be detachably mounted to the second flange 63. The upper end of the second flange 63 is provided with an upper sleeve 6, and the upper end of the screw assembly 5 and the upper end of the inner sleeve 3 are both located in the upper sleeve 6. The side wall of the upper sleeve 6 is provided with a plurality of second bolt holes 61 along the circumferential direction, and the first bolt holes and the second bolt holes 61 correspond to each other one by one. Each fixing bolt 62 is located at a first The bolting hole and the second bolting hole 61 are used to fix the relative positions of the upper jacket 6 and the inner jacket 3. When the soft soil foundation anti-disturbance test device is sunk into the soft soil foundation, the lower end of the outer jacket 1 is connected to the anchor head 2, and the upper end of the outer jacket 1 is connected to the inner jacket to ensure that the entire device is an integrated structure and is sunk into the soft soil foundation by static pressure. An upper jacket 6 is arranged on the upper end of the outer jacket 1. The upper jacket 6 is mainly used to cover the upper end of the outer jacket 1 to prevent debris from entering the inner jacket 3 and the sliding sleeve 4, thereby improving the reliability of the device.

[0055] like Figure 7 As shown, a guide rail 31 is axially provided on the side wall of the inner sleeve 3, and a slide groove 41 is axially provided on the periphery of the sliding sleeve 4. The periphery of the guide rail 31 is slidably connected to the sliding sleeve 4. The guide rail 31 arranged in the inner sleeve 3 is used to guide the sliding direction of the sliding sleeve 4 to prevent the sliding sleeve 4 from rotating synchronously with the sliding shaft 53. An end cover 42 is arranged at the upper end of the sliding sleeve 4, and the lower end of the end cover 42 can abut against the upper end of the guide rail 31 to prevent the sliding sleeve 4 from moving downward with the sliding shaft 53 or the sliding sleeve 4 from naturally sinking due to gravity.

[0056] like Figure 6 and Fig.11As shown, the detection component 7 includes a strain gauge 71, and the strain gauge 71 is a force sensor KMM20 of the prior art. The strain gauge 71 is installed in the installation hole, and a ball head 72 is arranged at one end of the strain gauge 71, and the other end of the strain gauge 71 faces the side wall of the outer sheath 1. The outer periphery of the ball head 72 is slidably connected to the outer wall of the sliding sleeve 4, and a wiring groove 43 is arranged on the sliding sleeve 4. A wiring hole 73 is opened in the middle of the ball head 72. The signal line of the strain gauge 71 is connected to the outside in series through the wiring hole 73 and the wiring groove 43 in sequence, and the creep amount under the foundation is sensed by the way that the strain gauge 71 contacts the soft soil foundation. The ball head 72 is arranged at the end of the strain gauge 71 to reduce the foundation surface with the outer wall of the sliding sleeve 4 to prevent damage to parts caused by hard scratches, and the signal line connected in series in the wiring hole 73 and the wiring groove 43 has a certain elasticity to prevent the problem of the signal line being broken when the strain gauge 71 and the sliding sleeve 4 are displaced relative to each other.

[0057] The periphery of the strain gauge 71 is slidably connected to the periphery of the protective tube 74. The lower end of the protective tube 74 is an arc-shaped structure, and the periphery of the ball head 72 is fixedly connected to the arc-shaped structure. The periphery of the ball head 72 is fixedly connected to one end of the strain gauge 71 through the second spring 75. The periphery of the protective tube 74 is slidably connected to the mounting hole. The protective tube 74 is a protective structure for the strain gauge 71. When the outer sheath 1 sinks, the strain gauge 71 is located inside the protective tube 74. When the outer sheath 1 is pulled out, the end of the protective tube 74 contacts the outer sheath 1 to prevent damage to the strain gauge 71 caused by collision.

[0058] A retaining ring 76 is installed in the mounting hole, the periphery of the protective tube 74 is slidably connected to the inner ring of the retaining ring 76, a ring platform 77 is arranged on the periphery of the protective tube 74, one end of the ring platform 77 is fixedly connected to one end of the retaining ring 76 through a third spring 78; a limiting groove 79 is provided at the lower end of the retaining ring 76, a limiting rod 710 is arranged on the periphery of the strain gauge 71, the periphery of the limiting rod 710 is slidably connected to the limiting groove 79, and the periphery of the limiting rod 710 can abut against one end of the third spring 78, and the retaining ring 76 is a limiting structure for the protective tube 74 and the strain gauge 71.

[0059] A plurality of release grooves 44 are axially arranged on the periphery of the sleeve 4, and each detection assembly 7 releases the actuator end through the release groove 44; the screw assembly 5 can drive the sleeve 4 to move upward relative to the inner sleeve 3, and the upwardly displaced sleeve 4 can move the release groove 44 relative to the arc structure of the protective tube 74 and the ball head 72, and the arc structure of the protective tube 74 moves toward the axis of the sleeve 4 through the third spring 78, and the displaced protective tube 74 can release the strain gauge 71 to the outside of the inner sleeve 3, and the two side walls of the release groove 44 are slopes 45, which slow down the speed of the protective tube 74 moving along the axis to prevent damage to the ball head 72 caused by sudden rebound.

[0060] The anchor head 2 includes a first tube body 21 and a conical head 22. The outer periphery of the first tube body 21 is threadedly connected to the inner ring of the outer sheath 1. The outer periphery of the lower end of the inner sheath 3 is located at the inner ring of the first tube body 21. The lower end of the first tube body 21 is fixedly connected to the conical head 22, and a conical groove is provided in the conical head 22. An opening 23 is provided circumferentially on the outer periphery of the conical head 22. The outer periphery of the top expansion block 52 is a truncated cone structure. The outer periphery of the top expansion block 52 abuts against the conical groove. The screw assembly 5 can drive the top expansion block 52 to sink along the axial direction of the screw assembly 5. The sinking top expansion block 52 is the diameter expansion structure of the conical head 22. After the top expansion block 52 expands the diameter of the conical head 22, The conical head 22 and the first tube body 21 can maintain an unchanged relative position in the soft soil foundation to facilitate the disassembly of the outer sleeve 1, and the inner sleeve 3 is not connected to the first tube body 21. After the test is completed, the inner sleeve 3, the sliding sleeve 4 and the screw assembly 5 can be pulled out, and the anchor head 2 is left under the foundation. In order to facilitate the rotation or fixation of the outer sleeve, a polygonal handle 12 is sleeved on the outer wall of the outer sleeve. The handle 12 can be held by an external fixing component to facilitate the operation of the outer sleeve 1. When the inner sleeve 3 is fixed, it can be achieved by bolting it to the external component through a fixing bolt 62, which will not be repeated here.

[0061] The process of implanting the soft soil foundation anti-disturbance test device into the soft soil foundation:

[0062] The staff connects the outer sheath 1 with the anchor head 2 through threads, and fixes the outer sheath 1 and the inner sheath 3 through the upper sheath 6 and the fixing bolt 62, and then sinks the device into the soft soil foundation by static pressure piling. By removing the upper sheath 6 to expose the hand wheel 54, the outer sheath 1 and the inner sheath 3 are fixed separately by external components. The staff rotates the hand wheel 54 to make the top expansion head sink, causing the diameter of the conical head 22 to expand, so that the anchor head 2 remains stationary in the foundation, and then rotates the outer sheath 1 to disconnect the outer sheath 1 from the anchor head 2, and then pulls out the outer sheath 1. At this time, there is a gap in the foundation hole caused by the inner sheath 3 and the outer sheath 1, and the end of the protective tube 74 is located in the gap, and the strain gauge 71 is concentrically arranged in the protective tube 74.

[0063] Release process of strain gauge 71:

[0064] The staff rotates the hand wheel 54 in the opposite direction to the above operation, so that the top expansion head rises. At this time, the clamping plate 56 is clamped on the lower end of the bearing 58, and the inner ring of the bearing 58 can rotate synchronously with the clamping plate 56 and the sliding shaft 53. As the sliding shaft 53 rises axially, the clamping plate 56 drives the sliding sleeve 4 to rise, and the ball head 72 gradually slides into the release groove 41. The end of the protective tube 74 moves toward the axis of the sliding sleeve 4 under the influence of the third spring 78. The strain gauge 71 maintains an unchanged relative position under the influence of the second spring 75 and the third spring 78. The strain gauge 71 is exposed to the gap. As the soft soil foundation creeps, the strain gauge 71 gradually contacts the foundation and outputs detection information after being subjected to the foundation pressure, which can be converted into application data through statistical calculations by the staff.

[0065] The control method of this embodiment is controlled by a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. This article is mainly used to protect mechanical devices. The control method and circuit connection will not be explained in detail in this article.

[0066] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Soft soil foundation anti-disturbance test device, characterized by: The invention comprises a screw assembly (5) and a sliding sleeve (4), an inner sleeve (3) and an outer sleeve (1) which are arranged in sequence from the inside to the outside on its periphery, the lower end of the outer sleeve (1) is threadedly connected to the anchor head (2), the upper end of the outer sleeve (1) is detachably connected to the upper end of the inner sleeve (3), the periphery of the sliding sleeve (4) can slide axially along the side wall of the inner sleeve (3), the periphery of the screw assembly (5) is threadedly connected to the inner ring of the lower end of the inner sleeve (3), and a top expansion block (52) is arranged at one end of the screw assembly (5), the periphery of the top expansion block (52) abuts against the inner ring of the anchor head (2), the side wall of the inner sleeve (3) is provided with a plurality of mounting holes, a detection assembly (7) is arranged in each mounting hole, one end of the detection assembly (7) is located at the inner ring of the outer sleeve (1), and the other end of the detection assembly (7) is contact-connected to the periphery of the sliding sleeve (4); The detection component (7) comprises a strain gauge (71), the strain gauge (71) is installed in the installation hole, a ball head (72) is arranged at one end of the strain gauge (71), the other end of the strain gauge (71) faces the side wall of the outer sheath (1), the outer periphery of the ball head (72) is slidably connected to the outer wall of the sliding sleeve (4), and the sliding sleeve (4) is provided with a wiring groove (43), a wiring hole (73) is arranged in the middle of the ball head (72), and the signal line of the strain gauge (71) is connected to the outside in series through the wiring hole (73) and the wiring groove (43) in sequence; The periphery of the strain gauge (71) is slidably connected to the periphery of the protective tube (74), the lower end of the protective tube (74) is an arc-shaped structure, and the periphery of the ball head (72) is fixedly connected to the arc-shaped structure, the periphery of the ball head (72) is fixedly connected to one end of the strain gauge (71) through a second spring (75), and the periphery of the protective tube (74) is slidably connected to the mounting hole; A retaining ring (76) is installed in the installation hole, the periphery of the protective tube (74) is slidably connected to the inner ring of the retaining ring (76), a ring platform (77) is arranged on the periphery of the protective tube (74), and one end of the ring platform (77) is fixedly connected to one end of the retaining ring (76) through a third spring (78); A limiting groove (79) is provided at the lower end of the retaining ring (76), a limiting rod (710) is provided on the periphery of the strain gauge (71), the periphery of the limiting rod (710) is slidably connected to the limiting groove (79), and the periphery of the limiting rod (710) can abut against one end of the third spring (78); The screw assembly (5) comprises a screw body (51), a top expansion block (52) is installed at the lower end of the screw body (51), the outer periphery of the screw body (51) is threadedly connected to the lower inner ring of the inner sleeve (3), a sliding shaft (53) is installed at the upper end of the screw body (51), the sliding shaft (53) is located in the inner ring of the sliding sleeve (4), a clamping assembly is arranged on the side wall of the sliding shaft (53), the clamping assembly does not interfere with the axial downward displacement of the sliding shaft (53), the upper end of the clamping assembly can be clamped to the lower end of the sliding sleeve (4), and a hand wheel (54) is arranged at the upper end of the sliding shaft (53); A plurality of release annular grooves (44) are provided axially on the periphery of the sliding sleeve (4), and each detection component (7) releases the execution end through the release annular groove (44); The lead screw assembly (5) can drive the sliding sleeve (4) to move upward relative to the inner sleeve (3); the sliding sleeve (4) that moves upward can release the annular groove (44) to move relative to the arc-shaped structure of the protective tube (74) and the ball head (72); the arc-shaped structure of the protective tube (74) moves toward the axis of the sliding sleeve (4) through the third spring (78); and the displaced protective tube (74) can release the strain gauge (71) to the outside of the inner sleeve (3); The two side walls of the release annular groove (44) are slopes (45).

2. The soft soil foundation anti-disturbance testing device according to claim 1, characterized in that: The clamping assembly comprises a first spring (55), a clamping plate (56) is arranged at one end of the first spring (55), a first blind groove is arranged on the periphery of the sliding shaft (53), the other end of the first spring (55) is fixedly connected to the bottom of the first blind groove, and the periphery of the clamping plate (56) is slidably connected to the first blind groove, a wedge-shaped slope (57) is arranged on the lower side of the clamping plate (56), the lower inner ring of the sliding sleeve (4) is fixedly sleeved on the outer ring of the bearing (58), and the sliding shaft (53) is located on the inner ring of the bearing (58), and the upper side of the clamping plate (56) can abut against the lower inner ring of the bearing (58).

3. The soft soil foundation anti-disturbance testing device according to claim 1, characterized in that: The outer periphery of the lower end of the inner sleeve (3) is located in the inner circle of the anchor head (2), and the upper end side wall of the inner sleeve (3) is provided with a plurality of first bolt holes along the circumferential direction. The upper end of the outer sleeve (1) is provided with a first flange (11), and the first flange (11) can be detachably mounted to the second flange (63). The upper end of the second flange (63) is provided with an upper sleeve (6), and the upper end of the screw assembly (5) and the upper end of the inner sleeve (3) are both located in the upper sleeve (6). The side wall of the upper sleeve (6) is provided with a plurality of second bolt holes (61) along the circumferential direction, and the first bolt holes and the second bolt holes (61) correspond one to one. Each fixing bolt (62) is located in a first bolt hole and a second bolt hole (61) for fixing the relative position of the upper sleeve (6) and the inner sleeve (3).

4. The soft soil foundation anti-disturbance testing device according to claim 1, characterized in that: A guide rail (31) is axially provided on the side wall of the inner sleeve (3), a slide groove (41) is axially provided on the periphery of the sliding sleeve (4), the periphery of the guide rail (31) is slidably connected to the inside of the sliding sleeve (4), and an end cover (42) is sleeved on the upper end of the sliding sleeve (4), and the lower end of the end cover (42) can abut against the upper end of the guide rail (31).

5. The soft soil foundation anti-disturbance testing device according to claim 1, characterized in that: The anchor head comprises a first tube body (21) and a conical head (22); the outer periphery of the first tube body (21) is threadedly connected to the inner ring of the outer sleeve (1); the outer periphery of the lower end of the inner sleeve (3) is located at the inner ring of the first tube body (21); the lower end of the first tube body (21) is fixedly connected to the conical head (22); a conical groove is provided in the conical head (22); an opening (23) is provided on the outer periphery of the conical head (22) along the circumferential direction; the outer periphery of the top expansion block (52) is a truncated cone structure; the outer periphery of the top expansion block (52) abuts against the conical groove; the screw assembly (5) can drive the top expansion block (52) to sink along the axial direction of the screw assembly (5); the sinking top expansion block (52) is an expanded diameter structure of the conical head (22).

6. The soft soil foundation anti-disturbance testing device according to claim 1, characterized in that: The outer wall of the outer sleeve is sleeved with a polygonal handle connecting platform (12).

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