CN114809009B - Temporary support structure for load test - Google Patents
Temporary support structure for load test Download PDFInfo
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- CN114809009B CN114809009B CN202210483436.5A CN202210483436A CN114809009B CN 114809009 B CN114809009 B CN 114809009B CN 202210483436 A CN202210483436 A CN 202210483436A CN 114809009 B CN114809009 B CN 114809009B
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims abstract description 74
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to the technical field of temporary support and discloses a temporary support structure for a load test, which comprises a driving box body, a plurality of groups of support flat plates arranged on the peripheral outer side wall of the driving box body and a driving mechanism arranged in the driving box body and used for driving the plurality of groups of support flat plates to slide synchronously, wherein the driving mechanism comprises a rotating ring rotatably arranged in the driving box body, a plurality of rotating straight rods circumferentially fixed on the peripheral surface of the rotating ring and driving straight rods fixed on the support flat plates close to the side wall of the rotating ring, the driving straight rods penetrate through the side wall of the driving box body and are arranged in the driving box body in a sliding manner, and a power mechanism used for rotating the rotating ring and a transmission mechanism used for enabling the rotating straight rods to drive the driving straight rods to slide are arranged in the driving box body. The effect that the unable synchronous support foundation ditch inside wall all around of temporary support mechanism has to be improved has in this application.
Description
Technical Field
The utility model relates to the technical field of temporary support, in particular to a temporary support structure for a load test.
Background
The load test is the most widely applied method in various methods for testing the bearing capacity of pile foundations at present, and is recognized as the most accurate and reliable test result and is listed in the pile foundation engineering specifications or regulations of various countries. The test means utilizes various methods to manually load, simulate the actual working state of the foundation or the foundation, and test the loaded bearing performance and deformation characteristics. The method has the remarkable advantages that the stress condition is relatively close to the actual stress condition, the method is simple and easy to use, and the test result is visual and easy to understand and accept by people. During the load test, a worker can dig a test foundation pit on the ground, so that temporary support of the foundation pit is made, collapse of the foundation pit is avoided as much as possible, and experimental data can be influenced.
If the Chinese patent of the utility model with the publication number of CN214614101U is granted, a temporary supporting structure for a foundation pit at a tunnel portal is disclosed, the temporary supporting structure comprises a first telescopic rod and a second telescopic rod, wherein one end of the first telescopic rod and one end of the second telescopic rod, which are far away from each other, are rotationally connected with a spherical hinge, one end of the first telescopic rod and one end of the second telescopic rod, which are far away from each other, are rotationally connected with a protective partition plate through the spherical hinge, one end of the first telescopic rod, which is close to the second telescopic rod, is rotationally connected with a connecting piece, a through groove is formed in the middle of one end of the first telescopic rod, which is close to the connecting piece, and an inner cavity which is mutually communicated is formed in the groove bottom of the through groove. This foundation ditch temporary support structure is through keeping away from one side middle part fixedly connected with screw rod of first telescopic link at the connecting piece, and the empty slot has been seted up to the inside of second telescopic link, and the one end that the connecting piece was kept away from to the screw rod runs through the lateral wall fixedly connected with stopper that the empty slot is close to the connecting piece for can the length of first telescopic link and second telescopic link be adjusted.
For the related art, the inventor considers that after the foundation pit is excavated, the side walls around the foundation pit are all supported, otherwise, the collapse of which side wall of the foundation pit can affect the information of experimental load test data, and the temporary supporting structure for the foundation pit at the tunnel portal can only support two opposite side walls of the foundation pit and cannot support the side walls around the foundation pit.
Disclosure of Invention
In order to solve the problem that the temporary support mechanism cannot synchronously support the inner side walls around the foundation pit, the application provides a temporary support structure for a load test.
The application provides a temporary support structure for load test adopts following technical scheme:
the utility model provides a temporary support structure for load test, includes the drive box, install in a plurality of groups of support flat board of drive box lateral wall all around and set up in the drive box is inside be used for driving a plurality of groups of support flat board synchronous slip's actuating mechanism, actuating mechanism including rotate install in the inside rotation ring of drive box, encircle and be fixed in a plurality of rotation straight-bars of rotation ring outer peripheral face and be fixed in each support flat board is close to the drive straight-bar of rotation ring lateral wall, the drive straight-bar pass the drive box lateral wall and slide set up in inside the drive box, the drive box is inside be provided with and be used for supplying the rotatory power device of rotation ring and be used for making the rotation straight-bar drives the gliding drive mechanism of drive straight-bar.
By adopting the technical scheme: before the load test is carried out, a worker places the temporary support mechanism in a foundation pit for the load test, the worker drives the rotary ring to rotate through the power mechanism, the rotary ring drives the driving straight rod to slide through the transmission mechanism, namely, the rotary ring drives the support flat plate to slide along the length direction of the driving straight rod until a plurality of groups of support flat plates synchronously abut against the inner side walls around the foundation pit; after the load test is finished, the staff drives the rotary ring to reversely rotate through the power mechanism, the rotary ring drives the driving straight rod to reversely slide through the transmission mechanism, namely, the rotary ring drives the supporting flat plate to reversely slide along the length direction of the driving straight rod until the supporting flat plate is separated from the inner side walls around the foundation pit for the load test, and the problem that the temporary supporting mechanism cannot synchronously support the inner side walls around the foundation pit is solved.
Optionally, the drive mechanism is including being fixed in each rotate the straight-bar keep away from spacing cylinder and the perpendicular fixation of tip that rotates the ring each drive straight-bar is close to the total straight board of slide rail of the tip that rotates the ring, the straight board logical groove has been seted up along self length direction to the position that the total straight board of slide rail is located self top surface, spacing cylinder through the straight board logical groove slide set up in inside the slide rail is straight.
Through adopting above-mentioned technical scheme, power unit drives and rotates the ring and rotate, rotates the ring and drives spacing cylinder through rotating the straight-bar, and spacing cylinder slides through straight board through the groove and sets up in the straight inboard of slide rail for spacing cylinder drives the straight-bar of drive through the straight board of slide rail and slides, with this realization power unit drives a plurality of groups of dull and stereotyped synchronous movements of supporting.
Optionally, the base frame is installed to drive box bottom surface, base frame is the frame construction that the transversal rectangle that forms by four straight boards enclosing, the equipment recess has all been seted up to base frame inside wall, drive box top surface be provided with be used for with base frame matched with apron mechanism.
By adopting the technical scheme, the base frame is arranged to enable the supporting point of the driving box body to be far away from the area to be detected in the load test, so that the soil layer of the area to be detected in the load test is compacted by the dead weight of the temporary supporting structure as much as possible, and the detection result is inaccurate; meanwhile, the base frame can be matched with a cover plate mechanism of the adjacent temporary support mechanism.
Optionally, the apron mechanism include fixed mounting in the support apron of drive box top, be fixed in limit cover and the cover of locating limit cover top surface support the gland plate, support the gland plate around the inside wall with limit cover around the lateral wall one-to-one, support the gland plate inside wall with the correspondence the limit cover lateral wall laminating each other, limit cover is inside to be provided with and is used for making limit cover and adjacent temporary support structure the alignment mechanism of base frame alignment.
Through adopting above-mentioned technical scheme, the staff splices two adjacent temporary support mechanisms along vertical direction case for temporary support mechanism's base frame can combine together with adjacent temporary support mechanism's apron mechanism, supports the pressure apron of pressing adjacent temporary support mechanism through temporary support mechanism's dead weight, makes base frame can cup joint in pressure apron week side, aligns the vertical central line collineation that makes two adjacent drive box through aligning mechanism, with this stack that makes temporary support mechanism can satisfy the test foundation ditch of different degree of depth through a plurality of these temporary support mechanisms.
Optionally, the first spacing recess has all been seted up to spacing apron peripheral lateral wall, spacing recess second has all been seted up to the lateral wall around the pressure cover plate, a plurality of spacing recess first with a plurality of spacing recess second one-to-one, spacing recess first with correspond spacing recess two phase intercommunication, alignment mechanism includes through spacing recess first wears to locate spacing apron inside location straight-bar.
Through adopting above-mentioned technical scheme, support the pressure apron of pressing adjacent temporary support mechanism through temporary support mechanism's dead weight, until the spacing recess second of pressure apron lateral wall and spacing recess first of spacing apron lateral wall coincide each other, simultaneously, the location straight-bar passes through spacing recess first and wears out spacing apron and passes out spacing recess second through spacing recess second, then the location straight-bar passes through the equipment recess and wears to locate inside the base frame, location straight-bar tip butt in equipment recess inner bottom surface. Because the four positioning straight rods move synchronously, the vertical central lines of the two adjacent driving boxes are collinear under the condition of synchronous action of the positioning straight rods.
Optionally, the side that is close to each other between the dull and stereotyped of support and the adjacent support is the inclined plane, each the inclined plane of dull and stereotyped of support all is kept away from drive box direction slope, adjacent two the inclined plane of dull and stereotyped of support can laminate mutually.
By adopting the technical scheme, after the load test is finished, a worker drives the rotary ring to reversely rotate through the power mechanism; then rotate the ring and drive a plurality of groups of support dull and stereotypes and slide in step through drive mechanism, a plurality of groups of support dull and stereotypes all retract in step until the lateral wall laminating that support dull and stereotyped and drive box are close to each other, the lateral wall laminating that support dull and stereotyped and adjacent support shield are close to each other to this realization is convenient for transport by this temporary support mechanism.
Optionally, a protection net mechanism for avoiding falling rocks from collapsing as much as possible is arranged between the support flat plate and the adjacent inclined planes close to each other, the protection net mechanism comprises three elastic strands and a safety protection net fixedly connected between the two adjacent elastic strands, and the ends of the three elastic strands are provided with an assembly mechanism for fixing the safety protection net on the support flat plate.
Through adopting above-mentioned technical scheme, because the protection network mechanism sets up between the inclined plane that two adjacent support flat boards are close to each other, and two adjacent support flat boards are kept away from between the time and are close to each other, so set up the protection network mechanism into elasticity stranded conductor and safety protection network, the protection network mechanism can avoid falling stone to collapse as far as possible through self elasticity deformation force, and elasticity stranded conductor acts as the effect of stiffening rib to safety protection network this moment.
Optionally, the assembly mechanism includes a first sinking ball, a second sinking ball and a third sinking ball fixedly installed at two ends of each elastic stranded wire, the first sinking ball, the second sinking ball and the third sinking ball are sequentially fixed at different ends of the elastic stranded wire, the first sinking ball is larger than the second sinking ball in size, and the second sinking ball is larger than the third sinking ball in size; first ball groove, second ball groove and third ball groove have been seted up respectively to the dull and stereotyped inside of support, first ball groove second ball groove and third ball groove homogeneous phase intercommunication, first heavy ball pass through first ball groove place in the dull and stereotyped inside of support, the second heavy ball pass through the second ball groove place in the dull and stereotyped inside of support, the third heavy ball pass through third ball groove place in the dull and stereotyped inside of support.
Through adopting above-mentioned technical scheme, the staff places first heavy ball in the dull and stereotyped inside of support through first ball groove, and the second heavy ball is placed in the dull and stereotyped inside of support through the second ball groove, and the third heavy ball is placed in the dull and stereotyped inside of support through the third ball groove to this realizes that three elasticity stranded conductor can be along the equidistant setting of dull and stereotyped plumb line direction of support, and safety protection net fixed connection is in between the inclined plane that two adjacent dull and stereotyped mutual are close to simultaneously.
Optionally, the power unit includes rotate install in drive ring gear of drive box top surface, fixed connection in drive ring gear with rotate the main shaft sleeve between the ring, be fixed in the pneumatic cylinder of drive box top surface, be fixed in the straight board of support of the tip of pneumatic cylinder piston rod and be fixed in support the straight board of support is close to drive rack of the side of drive ring gear, drive rack with drive ring gear meshes mutually.
By adopting the technical scheme, before the load test work is carried out, a worker is electrified to start the hydraulic cylinder, the hydraulic cylinder drives the main shaft sleeve to rotate through the cooperation of the driving rack and the driving gear ring, and the main shaft sleeve drives the support flat plate to slide through the rotating ring until the support flat plate is abutted against the inner side wall around the foundation pit; after the load test work is finished, the hydraulic cylinder is powered off by the power failure of the worker, the hydraulic cylinder drives the main shaft sleeve to reversely rotate through the cooperation of the driving rack and the driving gear ring, and the main shaft sleeve drives the support flat plate to slide through the rotating ring until the support flat plate is separated from the inner side wall around the foundation pit for the load test.
In summary, the present application includes at least one of the following beneficial technical effects:
1. before the load test is carried out, a worker places the temporary support mechanism in a foundation pit for the load test, the worker drives the rotary ring to rotate through the power mechanism, the rotary ring drives the driving straight rod to slide through the transmission mechanism, namely, the rotary ring drives the support flat plate to slide along the length direction of the driving straight rod until a plurality of groups of support flat plates synchronously abut against the inner side walls around the foundation pit; after the load test is finished, the worker drives the rotary ring to reversely rotate through the power mechanism, and the rotary ring drives the driving straight rod to reversely slide through the transmission mechanism, namely, the rotary ring drives the support flat plate to reversely slide along the length direction of the driving straight rod until the support flat plate is separated from the inner side walls around the foundation pit for the load test, so that the problem that the temporary support mechanism cannot synchronously support the inner side walls around the foundation pit is solved;
2. the staff splice two adjacent temporary support mechanisms along the vertical direction box, so that the base frame of the temporary support mechanism can be combined with the cover plate mechanism of the adjacent temporary support mechanism, the pressing cover plate of the adjacent temporary support mechanism is pressed by the dead weight of the temporary support mechanism, the base frame can be sleeved on the periphery of the pressing cover plate, and the vertical central lines of the two adjacent driving boxes are aligned by the alignment mechanism, so that the temporary support mechanism can meet test foundation pits with different depths through superposition of a plurality of groups of temporary support mechanisms;
3. before the load test work is carried out, a worker is electrified to start a hydraulic cylinder, the hydraulic cylinder drives a main shaft sleeve to rotate through the cooperation of a driving rack and a driving gear ring, and the main shaft sleeve drives a support flat plate to slide through a rotating ring until the support flat plate is abutted against the inner side wall around the foundation pit; after the load test work is finished, the hydraulic cylinder is powered off by the power failure of the worker, the hydraulic cylinder drives the main shaft sleeve to reversely rotate through the cooperation of the driving rack and the driving gear ring, and the main shaft sleeve drives the support flat plate to slide through the rotating ring until the support flat plate is separated from the inner side wall around the foundation pit for the load test.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present application.
Fig. 2 is a schematic diagram of a partial explosion of an embodiment of the present application.
Fig. 3 is an exploded view of an embodiment of the cover plate removing device of the present application.
Fig. 4 is a schematic cross-sectional view of a drive housing according to an embodiment of the present application.
Fig. 5 is an exploded view of fig. 4.
Fig. 6 is a schematic cross-sectional view of a support plate.
Reference numerals illustrate: 11. driving the box body; 12. a base frame; 13. a cover plate device; 14. assembling the groove; 15. a first supporting round groove; 16. a spindle sleeve; 17. rotating the circular ring; 18. rotating the straight rod; 19. driving the through groove I; 20. driving a through groove II; 21. driving a straight rod; 22. a slide rail groove; 23. a slide rail bump; 24. a slide rail total straight plate; 241. a front slide rail straight plate; 242. a right slide rail straight plate; 243. a rear slide rail straight plate; 244. a left slide rail straight plate; 25. a first ball groove; 26. a second ball groove; 27. a third ball groove; 28. paying out and passing through the groove; 29. straight plate through groove; 30. a limit cylinder; 31. driving the gear ring; 32. a hydraulic cylinder; 33. pressing the straight plate; 34. a drive rack; 35. supporting a straight rod; 36. supporting the cover plate; 37. a second supporting round groove; 38. a limit cover plate; 39. pressing the cover plate; 40. a first limit groove; 41. positioning a straight rod; 42. a compression spring; 43. a positioning groove; 44. a second limit groove; 45. a third supporting round groove; 46. pressing the spring; 47. a support plate; 48. a purse seine device; 49. elastic stranded wires; 50. a safety protection net; 51. a first sinking ball; 52. a second sinking ball; 53. and thirdly, sinking balls.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
The embodiment of the application discloses a temporary support structure for load test. Referring to fig. 1 to 3, the temporary support structure for the load test includes a driving case 11 having a rectangular parallelepiped shape, a base frame 12 fixed to the bottom surface of the driving case 11, and a cover device 13 disposed above the driving case 11.
Referring to fig. 4 and 5, the driving case 11 is provided with a first supporting circular groove 15 penetrating through the upper and lower sides of the driving case along the plumb line direction thereof, and the first supporting circular groove 15 is co-linear with the central line of the driving case 11 along the vertical direction along the vertical axis. The driving box 11 is provided with a main shaft sleeve 16 in a penetrating way through a first supporting round groove 15, and the main shaft sleeve 16 is rotatably arranged on the inner peripheral surface of the first supporting round groove 15 through a bearing. A rotary ring 17 is coaxially fixed on the peripheral side of the spindle sleeve 16, and the rotary ring 17 is positioned inside the driving box 11. The outer peripheral surface of the rotary ring 17 is fixedly provided with rotary straight rods 18, four rotary straight rods 18 are axially and equally fixed at intervals by taking the axis of the rotary ring 17 as the axis, and two adjacent rotary straight rods 18 are vertically arranged.
Referring to fig. 4 and 5, the driving box 11 is provided with a driving through groove one 19 penetrating through the left and right side walls of the driving box 11, and the left and right side walls of the driving box 11 are respectively provided with a driving straight rod 21 in a penetrating manner through the driving through groove one 19; the driving box 11 is provided with a driving through groove II 20 penetrating through the front side wall and the rear side wall of the driving box 11, driving straight rods 21 are arranged on the front side wall and the rear side wall of the driving box 11 in a penetrating mode through the driving through groove II 20, four driving straight rods 21 are arranged at equal intervals in the axial direction along the axis of the rotating ring 17, and two adjacent driving straight rods 21 are vertically arranged. The inner bottom surface of the driving box 11 is provided with a sliding rail groove 22 along the length direction of the driving straight rod 21, and the sliding rail groove 22 is of a groove structure with a rectangular cross section. The position that the driving straight rod 21 is located on the bottom surface of the driving straight rod is fixedly provided with a sliding rail protruding block 23 along the length direction of the driving straight rod, and the sliding rail protruding block 23 is slidably arranged on the inner bottom surface of the driving box 11 through a sliding rail groove 22, so that the driving straight rod 21 is slidably arranged inside the driving box 11 along the length direction of the driving straight rod.
Referring to fig. 4 and 5, the end of the driving straight rod 21, which is close to the rotating ring 17, is vertically fixed with a slide rail total straight plate 24. The total straight slide rail plate 24 fixed by the straight drive rod 21 is a straight front slide rail plate 241, and the end part of the straight front slide rail plate 241 far away from the straight drive rod 21 is close to the right side wall of the drive box 11; the total straight slide rail plate 24 fixed by the straight drive rod 21 is a right straight slide rail plate 242, and the end part of the straight right slide rail plate 242 far away from the straight drive rod 21 is close to the rear side wall of the drive box 11; the total slide rail straight plate 24 fixed by the driving straight rod 21 positioned on the rear side wall of the driving box body 11 is a rear slide rail straight plate 243, and the end part of the rear slide rail straight plate 243 far away from the driving straight rod 21 is close to the left side wall of the driving box body 11; the total straight slide rail plate 24 fixed by the straight drive rod 21 on the left side wall of the drive box 11 is a straight left slide rail plate 244, and the end of the straight left slide rail plate 244 far from the straight drive rod 21 is close to the front side wall of the drive box 11. The slide rail total straight plate 24 is provided with a straight plate through groove 29 penetrating through the upper side surface and the lower side surface of the slide rail total straight plate 24 along the length direction of the slide rail total straight plate, a limiting cylinder 30 is fixed at the position, close to the slide rail total straight plate 24, of the bottom surface of the rotary straight rod 18, and the limiting cylinder 30 is slidably arranged inside the slide rail total straight plate 24 through the straight plate through groove 29, so that the limiting cylinder 30 is slidably arranged inside the slide rail total straight plate 24 along the length direction of the slide rail total straight plate.
Referring to fig. 2 and 3, the top end of the spindle sleeve 16 passes through the driving box 11 through the first supporting circular groove 15, a driving gear ring 31 is coaxially fixed to the peripheral side of the top of the spindle sleeve 16, and teeth of the driving gear ring 31 are disposed at the outer peripheral surface of the driving gear ring 31. The hydraulic cylinder 32 is fixed at the position of the driving box 11 on the top surface of the driving box along the direction of the side vertical line of the driving box, the abutting straight plate 33 is vertically fixed at the end part of the piston rod of the hydraulic cylinder 32, the driving rack 34 is fixed on the side surface of the abutting straight plate 33, which is close to the driving gear ring 31, and the driving rack 34 is meshed with the driving gear ring 31, so that the hydraulic cylinder 32 drives the driving gear ring 31 to rotate through the driving rack 34. The driving box 11 is positioned on the top surface of the driving box and is close to the four top angles of the top surface of the driving box, and the supporting straight rods 35 are vertically fixed at the positions of the top surface of the driving box. The top ends of the four supporting straight rods 35 are jointly fixed with a supporting cover plate 36, the supporting cover plate 36 is provided with a supporting circular groove II 37 penetrating through the upper side face and the lower side face of the supporting circular groove II along the plumb line direction of the supporting cover plate 36, and the supporting circular groove II 37 is collinear with the supporting cover plate 36 along the vertical central line along the vertical axis.
Referring to fig. 1 and 2, the cover device 13 includes a limiting cover plate 38 fixed on the top surface of the supporting cover plate 36 and a pressing cover plate 39 mounted on the top surface of the limiting cover plate 38, the outer side walls of the periphery of the limiting cover plate 38 are provided with limiting grooves one 40, the limiting cover plate 38 is provided with positioning straight rods 41 in a penetrating manner through the limiting grooves one 40, the inner side walls of the limiting grooves one 40 away from the notches are fixed with compression springs 42, the positioning straight rods 41 are fixedly connected with the end parts of the compression springs 42, which are close to each other, the bottom surface of the positioning straight rods 41 is an inclined surface, and the inclined surface is inclined from bottom to top in a direction away from the compression springs 42.
Referring to fig. 1 and 2, a positioning groove 43 with a rectangular cross section is formed in a position of the pressing cover plate 39 on the bottom surface of the pressing cover plate, the pressing cover plate 39 is sleeved on the limiting cover plate 38 through the positioning groove 43, the inner side walls around the pressing cover plate 39 correspond to the outer side walls around the limiting cover plate 38 one by one, and the inner side walls of the pressing cover plate 39 are attached to the corresponding outer side walls of the limiting cover plate 38. Limiting grooves II 44 are formed in the outer side walls of the periphery of the pressing cover plate 39, the four limiting grooves I40 are in one-to-one correspondence with the four limiting grooves II 44, and the limiting grooves I40 are communicated with the corresponding limiting grooves II 44. The pressing springs 46 are fixedly connected between the inner top surface of the pressing cover plate 39 and the outer top surface of the limiting cover plate 38, and a group of pressing springs 46 are fixedly arranged at four vertex angle positions, close to the top surface, of the top surface of the limiting cover plate 38. The pressing cover plate 39 is provided with a third supporting round groove 45 penetrating through the upper side surface and the lower side surface of the pressing cover plate 39 along the plumb line direction, and the third supporting round groove 45 is collinear with the pressing cover plate 39 along the vertical central line along the vertical axis. At the same time, the first supporting round groove 15, the second supporting round groove 37 and the third supporting round groove 45 are communicated.
Referring to fig. 5, the base frame 12 is a frame structure formed by enclosing four straight plates, the cross section of which is rectangular, the inner side walls of the base frame 12 are all provided with assembling grooves 14, and the assembling grooves 14 are groove structures with rectangular longitudinal sections.
Referring to fig. 3 and 6, the end of the driving straight rod 21 far from the rotating ring 17 is vertically fixed with a supporting plate 47, the sides of two adjacent supporting plates 47 close to each other are inclined planes, the inclined planes of the supporting plates 47 incline towards the direction far from the driving box 11, and the inclined planes of the two adjacent supporting plates 47 can be mutually attached. The supporting flat plate 47 is provided with a first ball groove 25 penetrating through the top surface of the supporting flat plate 47 along the height direction of the supporting flat plate 47, the inner bottom surface of the first ball groove 25 is provided with a second ball groove 26 along the height direction of the supporting flat plate 47, the inner bottom surface of the second ball groove 26 is provided with a third ball groove 27 along the height direction of the supporting flat plate 47, and the first ball groove 25, the second ball groove 26 and the third ball groove 27 are all groove structures with round cross sections. The supporting plate 47 is provided with a paying-off through groove 28 along the plumb line direction at the position of the inclined plane, and the paying-off through groove 28 penetrates through the top surface of the supporting plate 47 and is communicated with the first ball groove 25, the second ball groove 26 and the third ball groove 27.
Referring to fig. 3 and 6, a seine device 48 for avoiding collapse of falling rocks as much as possible is arranged between inclined surfaces of two adjacent support flat plates 47, the seine device 48 comprises elastic stranded wires 49, three elastic stranded wires 49 are arranged along plumb line directions of the support flat plates 47, and a safety protection net 50 is fixedly connected between the two adjacent elastic stranded wires 49. The ends of the three elastic stranded wires 49 are all arranged inside the support flat plate 47 in a penetrating mode through the paying-off through groove 28, the ends of the three elastic stranded wires 49 are sequentially fixed with a first sinking ball 51, a second sinking ball 52 and a third sinking ball 53 from top to bottom along the plumb line direction of the support flat plate 47, the size of the first sinking ball 51 is larger than that of the second sinking ball 52, and the size of the second sinking ball 52 is larger than that of the first sinking ball 51. The first sinking balls 51 are placed inside the supporting flat plate 47 through the first ball grooves 25, the second sinking balls 52 are placed inside the supporting flat plate 47 through the second ball grooves 26, and the third sinking balls 53 are placed inside the supporting flat plate 47 through the third ball grooves 27, so that three elastic strands 49 can be arranged at equal intervals along the plumb line direction of the supporting flat plate 47, and the safety protection net 50 can be fully unfolded.
The implementation principle of the temporary support structure for the load test is as follows: before the load test is carried out, first, a worker places the temporary support mechanism inside a foundation pit for the load test so that the area to be detected is located below the support circular groove one 15 of the driving box 11. Then the staff places first heavy ball 51 inside the support flat plate 47 through first ball groove 25, and second heavy ball 52 is inside the support flat plate 47 through second ball groove 26, and third heavy ball 53 is inside the support flat plate 47 through third ball groove 27, so that three elastic strands 49 can be arranged at equal intervals along the plumb line direction of the support flat plate 47, and meanwhile, safety protection net 50 is fixedly connected between the inclined planes of two adjacent support flat plates 47, which are close to each other. Finally, a worker is electrified to start the hydraulic cylinder 32, the hydraulic cylinder 32 drives the main shaft sleeve 16 to rotate through the cooperation of the driving rack 34 and the driving gear ring 31, the main shaft sleeve 16 drives the rotating straight rod 18 to rotate through the rotating circular ring 17, the rotating straight rod 18 drives the limiting cylinder 30 to slide along the length direction of the sliding rail total straight plate 24, the sliding rail total straight plate 24 drives the supporting flat plate 47 to slide along the length direction of the driving straight rod 21 through the driving straight rod 21 until the supporting flat plate 47 is abutted against the inner side wall around the foundation pit, and meanwhile, the safety protection net 50 can be fully unfolded and avoid the problem that soil blocks of the side wall of the foundation pit for load test fall off as far as possible.
After the load test is finished, firstly, a worker turns off the hydraulic cylinder 32, the hydraulic cylinder 32 drives the main shaft sleeve 16 to reversely rotate through the cooperation of the driving rack 34 and the driving gear ring 31, the main shaft sleeve 16 drives the rotating straight rod 18 to reversely rotate through the rotating circular ring 17, the rotating straight rod 18 drives the limiting cylinder 30 to reversely slide along the length direction of the total straight plate 24 of the sliding rail, the total straight plate 24 of the sliding rail drives the supporting flat plate 47 to reversely slide along the length direction of the driving straight rod 21 through the driving straight rod 21 until the supporting flat plate 47 is separated from the inner side wall of the periphery of the foundation pit for the load test, at the moment, the safety protection net 50 gradually loosens, and then the worker withdraws the purse net device 48. The piston rod of the hydraulic cylinder 32 is gradually retracted until the support plate 47 is attached to the side wall of the drive housing 11 adjacent to each other, and the support plate 47 is attached to the side wall of the support cover 36 adjacent to each other, at which time the temporary support mechanism is convenient for transportation.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (5)
1. The utility model provides a temporary support structure for load test, includes drive box (11), install in a plurality of groups of support dull and stereotyped (47) of lateral wall around drive box (11) and set up in drive box (11) are inside be used for driving a plurality of groups support dull and stereotyped (47) synchronous gliding actuating mechanism, its characterized in that: the driving mechanism comprises a rotary ring (17) rotatably mounted in the driving box body (11), a plurality of rotary straight rods (18) circumferentially fixed on the outer peripheral surface of the rotary ring (17) and driving straight rods (21) fixed on the supporting flat plates (47) and close to the side walls of the rotary ring (17), the driving straight rods (21) penetrate through the side walls of the driving box body (11) and are slidably arranged in the driving box body (11), and a power mechanism for enabling the rotary ring (17) to rotate and a transmission mechanism for enabling the rotary straight rods (18) to drive the driving straight rods (21) to slide are arranged in the driving box body (11);
the transmission mechanism comprises limit cylinders (30) fixed at the end parts of the rotary straight rods (18) far away from the rotary circular rings (17) and slide rail total straight plates (24) vertically fixed at the end parts of the drive straight rods (21) close to the rotary circular rings (17), straight plate through grooves (29) are formed in the positions, located on the top surfaces of the slide rail total straight plates (24), of the slide rail total straight plates along the length direction of the slide rail total straight plates, and the limit cylinders (30) are slidably arranged in the slide rail total straight plates (24) through the straight plate through grooves (29);
the bottom surface of the driving box body (11) is provided with a base frame (12), the base frame (12) is a frame structure which is formed by encircling four straight plates and has a rectangular cross section, the inner side walls of the base frame (12) are provided with assembly grooves (14), and the top surface of the driving box body (11) is provided with a cover plate mechanism which is matched with the base frame (12);
the cover plate mechanism comprises a supporting cover plate (36) fixedly arranged above the driving box body (11), a limiting cover plate (38) fixed on the top surface of the supporting cover plate (36) and a pressing cover plate (39) sleeved on the top surface of the limiting cover plate (38), wherein the inner side walls around the pressing cover plate (39) correspond to the outer side walls around the limiting cover plate (38) one by one, the inner side walls of the pressing cover plate (39) are mutually attached to the corresponding outer side walls of the limiting cover plate (38), and an alignment mechanism used for enabling the limiting cover plate (38) to be aligned with the base frame (12) of the adjacent temporary supporting structure is arranged in the limiting cover plate (38);
limiting grooves I (40) are formed in the peripheral outer side walls of the limiting cover plates (38), limiting grooves II (44) are formed in the peripheral outer side walls of the pressing cover plates (39), the limiting grooves I (40) are in one-to-one correspondence with the limiting grooves II (44), the limiting grooves I (40) are communicated with the corresponding limiting grooves II (44), and the alignment mechanism comprises positioning straight rods (41) penetrating through the limiting grooves I (40) and arranged inside the limiting cover plates (38).
2. A temporary support structure for load testing according to claim 1, wherein: the side surfaces, which are close to each other, of the supporting flat plates (47) and the adjacent supporting flat plates (47) are inclined surfaces, the inclined surfaces of the supporting flat plates (47) incline towards the direction away from the driving box body (11), and the inclined surfaces of the adjacent two supporting flat plates (47) can be attached to each other.
3. A temporary support structure for load testing according to claim 1, wherein: the support flat plate (47) and adjacent support flat plate (47) are provided with a protection net mechanism for avoiding falling stone collapse as far as possible between the inclined planes close to each other, the protection net mechanism comprises three elastic strands (49) and a safety protection net (50) fixedly connected between the two adjacent elastic strands (49), and the ends of the three elastic strands (49) are provided with an assembly mechanism for fixing the safety protection net (50) on the support flat plate (47).
4. A temporary support structure for load testing according to claim 3, wherein: the assembly mechanism comprises a first sinking ball (51), a second sinking ball (52) and a third sinking ball (53) which are fixedly arranged at two ends of each elastic stranded wire (49), the first sinking ball (51), the second sinking ball (52) and the third sinking ball (53) are sequentially fixed at different ends of the elastic stranded wires (49), the size of the first sinking ball (51) is larger than that of the second sinking ball (52), and the size of the second sinking ball (52) is larger than that of the third sinking ball (53); first ball groove (25), second ball groove (26) and third ball groove (27) have been seted up respectively to strut dull and stereotyped (47) inside, first ball groove (25) second ball groove (26) and third ball groove (27) homogeneous phase intercommunication, first heavy ball (51) pass through first ball groove (25) place in strut dull and stereotyped (47) inside, second heavy ball (52) pass through second ball groove (26) place in strut dull and stereotyped (47) inside, third heavy ball (53) place in through third ball groove (27) strut dull and stereotyped (47) inside.
5. A temporary support structure for load testing according to claim 1, wherein: the power mechanism comprises a driving gear ring (31) rotatably mounted on the top surface of the driving box body (11), a spindle sleeve (16) fixedly connected between the driving gear ring (31) and the rotating ring (17), a hydraulic cylinder (32) fixed on the top surface of the driving box body (11), a pressing straight plate (33) fixed on the end part of a piston rod of the hydraulic cylinder (32) and a driving rack (34) fixed on the side surface, close to the driving gear ring (31), of the pressing straight plate (33), wherein the driving rack (34) is meshed with the driving gear ring (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210483436.5A CN114809009B (en) | 2022-05-06 | 2022-05-06 | Temporary support structure for load test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210483436.5A CN114809009B (en) | 2022-05-06 | 2022-05-06 | Temporary support structure for load test |
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| CN114809009A CN114809009A (en) | 2022-07-29 |
| CN114809009B true CN114809009B (en) | 2024-03-08 |
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| CN215290162U (en) * | 2021-07-23 | 2021-12-24 | 北京隧盾市政建设有限公司 | Foundation pit supporting structure |
| CN114319366A (en) * | 2021-12-02 | 2022-04-12 | 张晓红 | Protection device for construction |
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| CN108508189A (en) * | 2018-06-13 | 2018-09-07 | 华侨大学 | Seepage field and oscillator field coupling lead to the experimental rig and method of foundation pit destruction |
| KR101966190B1 (en) * | 2018-11-15 | 2019-04-05 | 서울대학교산학협력단 | Apparatus for Borehole Shear Test having Cleaner of Shear Plate |
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| CN114809009A (en) | 2022-07-29 |
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