CN114525796B - Construction process and construction equipment for deep foundation pit of bearing platform - Google Patents
Construction process and construction equipment for deep foundation pit of bearing platform Download PDFInfo
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- CN114525796B CN114525796B CN202210182824.XA CN202210182824A CN114525796B CN 114525796 B CN114525796 B CN 114525796B CN 202210182824 A CN202210182824 A CN 202210182824A CN 114525796 B CN114525796 B CN 114525796B
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 92
- 239000010959 steel Substances 0.000 claims abstract description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 239000002689 soil Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 239000000945 filler Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000014121 butter Nutrition 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
- 210000002268 wool Anatomy 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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The application discloses cushion cap deep basal pit construction technology and construction equipment belongs to the field of bridge engineering construction, it includes the base and is fixed in the drain pump on the base, install the riser with ground looks butt on the base, be provided with the drive arrangement who is used for driving riser and steel sheet pile medial surface looks butt on the base, the test box is installed to the medial surface of riser, the top surface of test box is fixed with the laser instrument, the interior bottom surface of test box is fixed with battery and sleeve, the water inlet channel that is linked together with the sleeve is seted up to the bottom surface of test box, install the floater along vertical sliding in the sleeve, the top of floater is fixed with movable block one, movable block one is connected with the battery electricity, the interior top surface of test box is fixed with the supporting shoe two that can be with movable block one electrical contact, the supporting shoe two is connected with the laser instrument electricity. The specific position that leaks in cofferdam is observed to this application staff of being convenient for.
Description
Technical Field
The application relates to the technical field of bridge engineering construction, in particular to a construction process and construction equipment for a deep foundation pit of a bearing platform.
Background
The cofferdam is a temporary enclosure structure built for building a permanent hydraulic facility in hydraulic engineering construction. The cofferdam is used for preventing water and soil from entering a building construction position so as to drain water in the cofferdam, excavate a foundation pit and build the building.
For example, chinese patent publication No. CN101457527B discloses a simple and quick water stopping method of Larson steel sheet pile cofferdam, firstly, ensuring the perpendicularity of the steel sheet pile, inserting and driving the steel sheet pile by using a vibrating pile driver, arranging enough butter in a locking notch of the steel sheet pile in the inserting and driving process, and ensuring the locking notch quality of the steel sheet pile; after water leakage is found in the water pumping process, graded coarse sand, saw dust and cement are adopted in time, and after being blended, a plugging guide pipe is arranged on the outer side of the steel sheet pile above the water leakage; the plugging mixture is lowered above the needed plugging through the plugging guide pipe, coarse sand, saw dust, cement and the like are sucked into the gap of the locking notch of the steel sheet pile for water leakage, and the steel sheet pile is filled tightly to achieve the water stopping effect.
For the above-described related art, the inventors consider that: the existing steel sheet pile locking notch is easy to leak, workers are usually required to inspect, ponding in the cofferdam is pumped and drained firstly, the leaking position is observed in the water pumping process, then a bag of filler is slipped down on the steel sheet pile at the leaking position, the principle that the suction force is generated by the water pressure difference drop of leaking is utilized, the filler is sucked into a gap at the leaking position under the action of the suction force, so that a leaking channel is blocked, but the steel sheet pile is usually longer, the number of the steel sheet piles is more, and the workers are difficult to observe the specific position of the leaking steel sheet pile.
Disclosure of Invention
In order to solve the problem that concrete positions of the steel sheet piles are difficult to observe, the application provides a pile cap deep foundation pit construction process and construction equipment.
In a first aspect, the present application provides a deep foundation pit construction equipment for a bearing platform, which adopts the following technical scheme:
the utility model provides a cushion cap deep basal pit construction technology and construction equipment, includes the base and is fixed in the drain pump on the base, install the riser with ground looks butt on the base, be provided with on the base and be used for the drive arrangement of riser and steel sheet pile medial surface looks butt, the test box is installed to the medial surface of riser, the top surface of test box is fixed with the laser instrument, the interior bottom surface of test box is fixed with battery and sleeve, the bottom surface of test box seted up with the water inlet channel that the sleeve is linked together, install the floater along vertical sliding in the sleeve, the top of floater is fixed with movable block one, movable block one with the battery electricity is connected, the interior top surface of test box be fixed with can with the supporting shoe second of movable block one electric contact, the supporting shoe second with the laser instrument electricity is connected.
Through adopting above-mentioned technical scheme, the ponding in the drain pump to cofferdam is taken out, the riser makes a retaining space with the medial surface looks butt of awaiting measuring steel sheet pile under drive arrangement's effect, forms between riser and the awaiting measuring steel sheet pile, if awaiting measuring steel sheet pile leaks, then the water level between riser and the awaiting measuring steel sheet pile rises, the floater upwards moves, the movable block upwards moves and with supporting shoe two electrical contact for the laser instrument circular telegram is launched the laser beam, thereby the staff of being convenient for observes the specific position that leaks of cofferdam.
Preferably, the first threaded rod is rotatably mounted on the base, the first threaded rod is sleeved with a moving block on the outer peripheral surface, a cavity is formed in the moving block, a limit groove is formed in the inner side surface of the cavity, a limiting block is slidably mounted on the moving block along the width direction of the limit groove, a rotating disc is rotatably mounted in the cavity, the rotating disc is in threaded connection with the first threaded rod, a connecting groove for inserting the limiting block is formed in the outer peripheral surface of the rotating disc, a guide rod is fixed on the base and penetrates through the moving block and is parallel to the first threaded rod, and a control assembly for driving the first threaded rod is arranged on the base.
By adopting the technical scheme, the driving assembly drives the first threaded rod to rotate, and when the limiting block is inserted into the connecting groove, the rotating disc and the moving block synchronously move, and the first threaded rod drives the moving block to move along the length direction of the first threaded rod; when the limiting block is separated from the connecting groove, the rotating disc rotates along with the first threaded rod.
Preferably, reset blocks are fixed on two sides of the limiting block, reset grooves are formed in two sides of the limiting groove, the reset blocks are connected with the moving blocks in a sliding mode through the reset grooves along the width direction of the moving blocks, springs I are fixed on the side faces, away from the rotating discs, of the reset blocks, and one ends, away from the reset blocks, of the springs I are fixedly connected with the inner side faces, away from the rotating discs, of the reset grooves.
Through adopting above-mentioned technical scheme, reset block moves towards the direction that is close to the rotation disc under the elasticity effect of spring one to drive the stopper and move towards the direction that is close to the rotation disc, so that the stopper inserts and establishes in the spread groove, make threaded rod one can drive the movable block and remove.
Preferably, the control assembly comprises a first stepping motor fixed on the base, an output shaft of the first stepping motor is fixedly connected with one end of the first threaded rod, a plurality of electromagnets are fixed on the outer circumferential surface of the guide rod, the electromagnets are arranged at equal intervals along the axial direction of the guide rod, and a magnetic block capable of being mutually attracted with the electromagnets is fixed on the side surface, away from the rotating disc, of the limiting block.
Through adopting above-mentioned technical scheme, start step motor one, drive threaded rod one and rotate, the movable block removes to the position department of electro-magnet, and the magnetic path removes towards the direction of keeping away from the rotation disc under the magnetic force effect of electro-magnet to make the stopper break away from the spread groove, the rotation disc loses spacingly, rotates the disc and rotates along with threaded rod one, and the movable block stops to remove.
Preferably, the driving device comprises a reciprocating screw rotatably mounted on the moving block, the water stop plate comprises a containment plate and two pressing plates fixed on the lateral surfaces of the containment plate, which are close to the steel sheet piles, the pressing plates are far away from the lateral surfaces of the containment plate and can be abutted against the steel sheet piles, the containment plate is in threaded connection with the reciprocating screw, a first bevel gear and a second bevel gear which are meshed with each other are rotatably mounted in the cavity, the second bevel gear is sleeved and fixed on the outer peripheral surface of the reciprocating screw, the first bevel gear is sleeved and arranged on the outer periphery of the first threaded rod, a clamping block is fixed on the inner peripheral surface of the first bevel gear, a clamping groove for inserting the clamping block is formed in the outer peripheral surface of the first threaded rod, and the clamping groove is formed along the length direction of the first threaded rod.
Through adopting above-mentioned technical scheme, the fixture block is inserted and is established in the draw-in groove, and bevel gear one rotates along with the threaded rod, and bevel gear one drives bevel gear two and rotates, and bevel gear two drives reciprocating screw and rotate, and reciprocating screw drive containment boom moves towards the direction that is close to the steel sheet pile for support clamp plate and steel sheet pile looks butt, thereby form the retaining space with water proof plate and the steel sheet pile that waits to test, so that wait to test whether the steel sheet pile leaks and detect.
Preferably, the apron board is kept away from one side of movable block is provided with the baffle with the bottom surface looks butt, reciprocating screw keeps away from the one end of movable block with the baffle rotates to be connected, the baffle is close to the side of movable block has seted up the butt groove, the baffle passes through the butt groove is along vertical the installing butt board that slides, the apron board is kept away from the side of movable block has been seted up the spout, the apron board passes through the spout is along vertical the installing slider that slides, the last threaded rod second that rotates of apron board, the slider with threaded rod second threaded connection, the top of apron board is fixed with step motor second, step motor second's output shaft with the top fixed connection of threaded rod second, the slider is close to the side of baffle is fixed with the control block, control block and test box fixed connection, the control block is close to the drive slot has been seted up to the side of steel sheet pile, the control block passes through the drive slot is along self width direction the drive block of sliding, the mounting groove has the mounting groove, the control block is passed through the mounting groove is followed one self width direction and is slided along the drive plate motor second, step motor is kept away from two side and is connected with two side-mounted electric pile and is kept away from the electric pile, step motor first side is kept away from with two side-mounted electric pile fixed connection.
By adopting the technical scheme, the reciprocating screw drives the control block to move towards the direction of the baffle, the control block is abutted against the baffle, the first moving sheet is separated from the first fixed sheet, the first stepping motor is powered off, the water stop plate stops moving, and the pressing plate is abutted against the steel sheet pile to be tested; meanwhile, the first moving plate is electrically contacted with the second fixed plate, the second stepping motor is electrified, the second threaded rod rotates, the control block moves downwards, and the control block drives the test box to move downwards, so that whether the steel sheet pile to be tested leaks or not is conveniently detected.
Preferably, the abutting plate is close to the side face of the control block and is fixedly provided with a mounting block, the bottom face of the control block can be abutted against the top face of the mounting block, the enclosing plate is close to the side face of the baffle, the enclosing plate is provided with a yielding block in a sliding mode along the width direction of the enclosing plate through the yielding groove, the abutting plate is close to the side face of the enclosing plate, a positioning groove for inserting the yielding block is formed in the side face of the abutting plate, the side face, away from the abutting plate, of the yielding block is fixedly provided with a spring III, and one end, away from the yielding block, of the spring III is fixedly connected with the side face, away from the abutting plate, of the yielding groove.
By adopting the technical scheme, the control block is abutted with the moving block in the downward moving process and pushes the abutting block to move downwards, in the descending process of the abutting block, the abdicating block is inserted into the positioning groove under the action of the elastic force of the spring III, so that the top surface of the abutting block is separated from the top surface of the abutting groove, when the control block moves upwards to the original position, the driving block moves towards the direction close to the baffle plate under the action of the elastic force of the spring II and is inserted into the abutting groove, the moving plate I is separated from the stator II, and the stepping motor II is closed; the first moving plate is electrically contacted with the first fixed plate, the first stepping motor is started, and the water stop plate moves towards the direction away from the baffle plate.
Preferably, the side surface of the abutting plate, which is far away from the containment plate, is fixedly provided with a dovetail block, the side surface of the abutting groove, which is far away from the containment plate, is provided with a dovetail groove, the dovetail block is vertically connected with the baffle in a sliding manner through the dovetail groove, the bottom surface of the dovetail block is fixedly provided with a spring IV, and the bottom end of the spring IV is fixedly connected with the bottom surface of the dovetail groove.
Through adopting above-mentioned technical scheme, the dovetailed block slides along vertical through the dovetail to make the butt piece be difficult for breaking away from the butt groove, and the butt piece slides along vertical all the time, when reciprocating screw drove the riser to move towards the direction of keeping away from the baffle, the piece of stepping down breaks away from the constant head tank, and the butt piece upwards moves and resets under the elasticity effect of spring IV.
Preferably, a pushing groove is formed in the moving block, the moving block is provided with a second moving block and a pushing plate in a sliding manner along the width direction of the moving block through the pushing groove, a pushing rod is fixed on the side face, close to the water stop, of the pushing plate, a carry through groove communicated with the pushing groove is formed in the side face, close to the water stop, of the moving block, the pushing rod is provided with a carry through groove along the width direction of the moving block, the pushing plate is provided with a fifth spring in a sliding manner along the width direction of the moving block, one end, away from the water stop, of the pushing plate is fixedly connected with the inner side face of the pushing groove, a second fixed block in electric contact with the second moving block is embedded and fixed on the inner side face of the pushing groove, a power supply is fixed on the base, and the second fixed block is electrically connected with the power supply, and the second moving block is electrically connected with the electromagnetic iron.
Through adopting above-mentioned technical scheme, the in-process that the orientation of water-stop plate moved near the direction of movable block, the water-stop plate promotes the catch bar and moves towards the direction of keeping away from the baffle, and the push pedal promotes movable block two, makes movable block two and fixed block separation, and the electro-magnet outage, stopper reset under the elasticity effect of spring one, and the movable block continues to remove to detect adjacent steel sheet pile.
In a second aspect, the application provides a deep foundation pit construction process of a bearing platform, which adopts the following technical scheme:
a construction process of a deep foundation pit of a bearing platform comprises the following steps:
s1, welding a guide frame on a positioning pile by using a drilling platform, inserting and driving a first steel sheet pile at a position close to the center of a cofferdam transverse bridge, and symmetrically inserting and driving the steel sheet piles at two sides respectively by taking the first steel sheet pile as a center line; after the steel sheet pile is inserted and driven, folding the steel sheet pile nearby the downstream corner pile; removing water seepage and surface precipitation in the cofferdam by using a water pump, checking whether the steel sheet piles leak water or not, and treating the leaking part;
s2, draining and excavating a soil layer in the foundation pit to a position 1.8m below the ground elevation, and installing a first inner support at a position 1.8m below the ground elevation;
s3, draining and excavating an inner soil layer of the foundation pit to the elevation of the top of the bearing platform, and installing a second inner support at the position 0.5m above the elevation of the top of the bearing platform;
s4, continuously excavating a soil layer in the foundation pit to the elevation position of the bottom of the bearing platform, cleaning slag soil and broken stone at the bottom of the foundation pit, and pouring concrete at the bottom of the foundation pit to form a foundation pit cushion layer;
s5, binding bearing platform reinforcing steel bars, mounting bearing platform reinforcing steel bars and bearing platform templates on the foundation pit cushion layer, and pouring concrete in the bearing platform templates;
s6, dismantling the bearing platform template and the steel sheet pile.
By adopting the technical scheme, the detection box is used for detecting whether the steel sheet pile leaks or not and the water leakage position during construction, so that the complexity of manual detection is reduced, and the concrete position of the water leakage steel sheet pile is convenient to observe.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the drainage pump pumps and discharges accumulated water in the cofferdam, the water-stop sheet is abutted against the inner side surface of the steel sheet pile to be tested under the action of the driving device, so that a water storage space is formed between the water-stop sheet and the steel sheet pile to be tested, if the steel sheet pile to be tested leaks, the water level between the water-stop sheet and the steel sheet pile to be tested rises, the floating ball moves upwards, the movable block moves upwards and is in electrical contact with the second supporting block, the laser is electrified and emits a laser beam, and therefore workers can observe the specific water leakage position of the cofferdam conveniently;
2. starting a first stepping motor to drive a first threaded rod to rotate, moving a moving block to the position of an electromagnet, and moving the magnetic block towards a direction away from a rotating disc under the action of magnetic force of the electromagnet, so that a limiting block is separated from a connecting groove, the rotating disc loses the limiting, the rotating disc rotates along with the first threaded rod, and the moving block stops moving;
3. the clamping block is inserted in the clamping groove, the first bevel gear rotates along with the first threaded rod, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the reciprocating screw to rotate, and the reciprocating screw drives the containment plate to move towards the direction close to the steel sheet pile, so that the pressing plate is abutted against the steel sheet pile, and a water storage space is formed between the water stop plate and the steel sheet pile to be tested, so that whether the steel sheet pile to be tested leaks or not is detected.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present application.
Fig. 2 is a cross-sectional view of a moving block in an embodiment of the present application.
Fig. 3 is an enlarged schematic view at a in fig. 2.
Fig. 4 is a schematic structural view of a rotating disk in the embodiment of the present application.
Fig. 5 is a schematic structural view of the water stop plate and the baffle plate in the embodiment of the present application.
Fig. 6 is a sectional view taken along line B-B of fig. 5.
Fig. 7 is an enlarged schematic view at C in fig. 6.
FIG. 8 is a cross-sectional view of a test cassette in an embodiment of the present application.
Reference numerals: 1. a base; 11. a first threaded rod; 111. a clamping groove; 12. a guide rod; 13. an electromagnet; 14. a power supply; 15. a draining pump; 16. a first stepping motor; 2. a moving block; 21. rotating the disc; 211. a connecting groove; 22. a cavity; 23. a limiting block; 231. a magnetic block; 232. a limit groove; 24. bevel gears I; 241. a clamping block; 25. bevel gears II; 26. a reset block; 261. a reset groove; 262. a first spring; 3. a water-stop plate; 31. a containment plate; 32. a pressing plate; 33. a second threaded rod; 34. a slide block; 35. a chute; 36. a reciprocating screw; 37. a step motor II; 38. a fixed rod; 4. a control block; 41. a driving groove; 42. a driving block; 43. a mounting groove; 44. a first moving plate; 45. a stator I; 46. a second stator; 47. a second spring; 48. a relief groove; 49. letting the bit block; 491. a third spring; 5. a baffle; 51. an abutment groove; 52. an abutting plate; 53. a positioning groove; 54. dovetail blocks; 55. a dovetail groove; 56. a spring IV; 57. a mounting block; 6. a second movable block; 61. a second fixed block; 62. a push plate; 63. a push rod; 64. a pushing groove; 65. carry through slot; 66. a spring V; 7. a test box; 71. a laser; 72. a sleeve; 73. a water inlet through groove; 74. a floating ball; 75. a support rod; 76. a support through hole; 77. a first movable block; 78. a second supporting block; 79. and a storage battery.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-8.
The embodiment of the application discloses a construction process and construction equipment for a deep foundation pit of a bearing platform.
The embodiment of the application discloses a bearing platform deep foundation pit construction device. Referring to fig. 1 and 2, the deep foundation pit construction equipment of the bearing platform comprises a base 1 and a drainage pump 15 fixed on the base 1, a first threaded rod 11 horizontally arranged is rotatably installed on the base 1, and a moving block 2 is sleeved on the outer peripheral surface of the first threaded rod 11. A cavity 22 is formed in the moving block 2, a rotating disc 21 is rotatably arranged in the moving block 2 through the cavity 22, and the rotating disc 21 is in threaded connection with the first threaded rod 11. The base 1 is fixedly provided with a first stepping motor 16, and an output shaft of the first stepping motor 16 is fixedly connected with one end of a first threaded rod 11. The guide rod 12 is fixed on the base 1, the guide rod 12 is parallel to the first threaded rod 11 and penetrates through the moving block 2, a plurality of electromagnets 13 are embedded and fixed on the outer circumferential surface of the guide rod 12, the electromagnets 13 are arranged at equal intervals along the axial direction of the guide rod 12, the distance between two adjacent electromagnets 13 is equal to the interval between two steel sheet piles, and a power supply 14 is fixed on the base 1.
Referring to fig. 3 and 4, a limiting groove 232 is formed in the inner circumferential surface of the cavity 22, a limiting block 23 is slidably mounted on the moving block 2 along the radial direction of the rotating disc 21 through the limiting groove 232, a magnetic block 231 which can be mutually attracted with the electromagnet 13 is fixed on the side surface of the limiting block 23 away from the rotating disc 21, and a connecting groove 211 for inserting the limiting block 23 is formed in the outer circumferential surface of the rotating disc 21. Reset blocks 26 are fixed on two sides of the limiting block 23, reset grooves 261 are formed on two sides of the limiting groove 232, the reset blocks 26 are connected with the moving block 2 in a sliding mode along the width direction of the moving block 2 through the reset grooves 261, a first spring 262 is fixed on the side face, away from the rotating disc 21, of the reset blocks 26, and one end, away from the reset blocks 26, of the first spring 262 is fixedly connected with the inner side face, away from the rotating disc 21, of the reset grooves 261. When the magnet 231 is attracted with the electromagnet 13, the limiting block 23 is separated from the rotating disc 21, the rotating disc 21 rotates along with the first threaded rod 11, and the moving block 2 stops moving.
Referring to fig. 2 and 4, a horizontally arranged reciprocating screw 36 is rotatably mounted on the moving block 2, and the reciprocating screw 36 is perpendicular to the first threaded rod 11. The first bevel gear 24 and the second bevel gear 25 meshed with each other are rotatably arranged in the cavity 22, the first bevel gear 24 is sleeved on the periphery of the first threaded rod 11, and the second bevel gear 25 is sleeved and fixed on the periphery of the reciprocating screw 36.
Referring to fig. 1 and 4, a clamping block 241 is fixed to an inner circumferential surface of the first bevel gear 24, a clamping groove 111 is formed in an outer circumferential surface of the first threaded rod 11, the clamping groove 111 is formed along a length direction of the first threaded rod 11, and the clamping block 241 is inserted into the clamping groove 111. The clamping block 241 rotates along with the first threaded rod 11, the clamping block 241 drives the first bevel gear 24 to rotate, the first bevel gear 24 drives the second bevel gear 25 to rotate, and the second bevel gear 25 drives the reciprocating screw 36 to rotate.
Referring to fig. 1 and 5, a water stop plate 3 is provided around the outer peripheral surface of the reciprocating screw 36, and the bottom surface of the water stop plate 3 abuts against the ground. The water stop plate 3 comprises a containment plate 31 and two pressing plates 32 fixed on the lateral surface of the containment plate 31, which is close to the steel sheet pile, wherein the containment plate 31 is in threaded connection with a reciprocating screw rod 36, and the lateral surface of the pressing plates 32, which is far away from the moving block 2, can be abutted against the inner lateral surface of the steel sheet pile.
Referring to fig. 5 and 6, a sliding groove 35 is formed in the side surface, away from the moving block 2, of the containment plate 31, and a sliding block 34 is vertically slidably mounted on the containment plate 31 through the sliding groove 35. The second threaded rod 33 is rotatably mounted in the sliding groove 35, and the sliding block 34 is in threaded connection with the second threaded rod 33. The top surface of the containment plate 31 is fixed with a second stepping motor 37, and an output shaft of the second stepping motor 37 is fixedly connected with the top end of the second threaded rod 33. The movable block 2 is fixedly provided with a fixed rod 38, the fixed rod 38 penetrates through the containment plate 31, one end, away from the movable block 2, of the fixed rod 38 is fixedly provided with a baffle plate 5, and the baffle plate 5 is rotatably connected with one end, away from the movable block 2, of the reciprocating screw 36. The side of the baffle 5, which is close to the moving block 2, is provided with an abutting groove 51, the baffle 5 is vertically slidably provided with an abutting plate 52 through the abutting groove 51, and the side of the abutting plate 52, which is close to the moving block 2, is fixedly provided with an installation block 57. The inner side surface of the abutting groove 51, which is far away from the moving block 2, is provided with a dovetail groove 55, and the dovetail block 54 is vertically connected with the baffle 5 in a sliding manner through the dovetail groove 55. The bottom surface of the dovetail block 54 is fixed with a spring four 56, and the bottom end of the spring four 56 is fixedly connected with the bottom surface of the dovetail groove 55.
Referring to fig. 6 and 7, a control block 4 is fixed to a side of the slider 34 away from the moving block 2, a driving groove 41 is formed in a side of the control block 4 away from the moving block 2, and the control block 4 is slidably mounted with a driving block 42 in a width direction thereof through the driving groove 41. The side of the driving block 42 close to the moving block 2 is fixedly provided with a second spring 47, and one end of the second spring 47 far away from the driving block 42 is fixedly connected with the inner side of the driving groove 41 close to the moving block 2. The mounting groove 43 is provided on the inner top surface of the driving groove 41, and the first moving plate 44 is fixed on the bottom surface of the driving block 42, and the first moving plate 44 is slidably connected with the control block 4 along the width direction of the control block 4 through the mounting groove 43. The inner side surface of the mounting groove 43 far away from the moving block 2 is fixedly provided with a first stator 45, the first stator 45 is electrically connected with the first stepping motor 16, the side surface of the mounting groove 43 near the moving block 2 is fixedly provided with a second stator 46, and the second stator 46 is electrically connected with the second stepping motor 37.
Referring to fig. 6 and 7, a relief groove 48 is formed in a side surface of the containment plate 31 away from the moving block 2, the relief groove 48 is located below the sliding groove 35, a relief block 49 is slidably mounted on the containment plate 31 in a width direction of the containment plate through the relief groove 48, and a positioning groove 53 for inserting the relief block 49 is formed in a side surface of the abutment plate 52 close to the moving block 2. And a third spring 491 is fixed on the side surface of the position-letting block 49, which is close to the moving block 2, and one end of the third spring 491, which is far away from the position-letting block 49, is fixedly connected with the inner side surface of the position-letting groove 48, which is close to the moving block 2. The side surface of the abutting plate 52 away from the moving block 2 is fixed with the moving block 2, and the top surface of the moving block 2 can abut against the bottom surface of the control block 4.
Referring to fig. 6 and 7, the reciprocating screw 36 drives the control block 4 to move toward the baffle 5, the control block 4 is abutted against the baffle 5, the first moving plate 44 is separated from the first fixed plate 45, the first stepping motor 16 is powered off, the water stop plate 3 stops moving, and the pressing plate 32 is abutted against the inner side surface of the steel sheet pile; the first moving plate 44 is electrically contacted with the second fixed plate 46, the second stepping motor 37 is electrified, the second threaded rod 33 rotates, the control block 4 moves downwards, the control block 4 is abutted with the moving block 2 in the downward moving process and pushes the abutting block 52 to move downwards, and therefore the positioning block 49 is conveniently inserted into the positioning groove 53 under the elastic force of the third spring 491; when the control block 4 moves upwards to the original position, the driving block 42 moves towards the direction approaching to the baffle 5 under the action of the elastic force of the second spring 47, the first moving plate 44 is separated from the second moving plate 46, and the second stepping motor 37 is closed; the first moving plate 44 is in electrical contact with the first fixed plate 45, the first stepping motor 16 is started, and the water stop plate 3 moves in a direction approaching the moving block 2.
Referring to fig. 5 and 8, a test box 7 is fixed to a side surface of the control block 4, and a laser 71 is fixed to a top surface of the test box 7. The inside of the test box 7 is fixed with a sleeve 72, and the bottom surface of the test box 7 is provided with a water inlet through groove 73 communicated with the sleeve 72. The top surface of sleeve 72 has seted up the support through-hole 76, installs floater 74 along vertical slip in the sleeve 72, and the top surface of floater 74 is fixed with bracing piece 75. The top end of the supporting rod 75 passes through the supporting through hole 76 and is fixed with a first movable block 77, a storage battery 79 is fixed on the inner bottom surface of the test box 7, and the storage battery 79 is electrically connected with the first movable block 77. The inner top surface of the test box 7 is fixed with a second supporting block 78 which can be electrically contacted with the first movable block 77, and the second supporting block 78 is electrically connected with the laser 71.
Referring to fig. 2 and 5, a pushing groove 64 is formed in the moving block 2, and the moving block 2 is slidably provided with a second moving block 6 and a push plate 62 in the width direction thereof by the pushing groove 64. The push plate 62 is fixed with the push rod 63 near the side of containment plate 31, and the side that the movable block 2 is close to containment plate 31 has seted up the carry through groove 65 that is linked together with the push groove 64, and push rod 63 slides with the movable block 2 along the width direction of movable block 2 through carry through groove 65. The side surface of the second movable block 6, which is far away from the containment plate 31, is fixedly provided with a spring five 66, and one end of the spring five 66, which is far away from the containment plate 31, is fixedly connected with the inner side surface of the pushing groove 64, which is far away from the containment plate 31. The fixed block II 61 which is electrically contacted with the movable block II 6 is embedded and fixed on the inner top surface of the pushing groove 64, the fixed block II 61 is electrically connected with the power supply 14, and the movable block II 6 is electrically connected with the electromagnet 13.
The implementation principle of the deep foundation pit construction process and construction equipment of the bearing platform in the embodiment of the application is as follows: the first stepping motor 16 is started, the first threaded rod 11 and the reciprocating screw rod 36 rotate, the moving block 2 moves along the length direction of the first threaded rod 11, the second moving block 6 moves towards the direction close to the steel sheet pile under the action of the elastic force of the fifth spring 66, the second moving block 6 is in electrical contact with the second fixed block 61, the electromagnet 13 is electrified, the magnetic block 231 is separated from the rotating disc 21 under the action of the magnetic force of the electromagnet 13, and the moving block 2 stops; the water stop plate 3 moves towards the direction close to the steel sheet pile, the driving block 42 is abutted with the abutting plate 52, the first moving plate 44 is separated from the first fixed plate 45, the first stepping motor 16 is powered off, the water stop plate 3 stops moving, the abutting plate 32 is abutted with the steel sheet pile, the first moving plate 44 is electrically contacted with the second fixed plate 46, the second stepping motor 37 is started, the sliding block 34 drives the control block 4 and the test box 7 to move downwards, if the steel sheet pile contacted with the water stop plate 3 leaks, the floating ball 74 moves upwards under the action of buoyancy of water, the first moving block 77 is electrically contacted with the second supporting block 78, and the laser 71 is started, so that a constructor can observe a specific leaking position conveniently.
The construction process of the deep foundation pit of the bearing platform comprises the following steps:
s1, welding a guide frame on a positioning pile by using a drilling platform, inserting and driving a first steel sheet pile at a position close to the center of a cofferdam transverse bridge, and symmetrically inserting and driving the steel sheet piles at two sides respectively by taking the first steel sheet pile as a center line; after each steel sheet pile is inserted and driven, checking the perpendicularity of the steel sheet pile and the connection strength of the steel sheet pile and the ground; after the steel sheet pile is inserted and driven, folding the steel sheet pile nearby the downstream corner pile;
before the steel sheet pile is inserted and driven, butter is smeared in the locking notch of the steel sheet pile for improving the locking notch strength when the two steel sheet piles are connected. After the steel sheet pile is supported, digging water collecting ditches at four corners of the peripheral side of the cofferdam, digging drainage ditches around the cofferdam, and draining water seepage and ground surface precipitation in the cofferdam by using a water pump;
filling a filler at the water leakage position when the steel sheet pile has water leakage; the filler can be one of fine sand, sawdust or fly ash;
when large-area leakage occurs to the steel sheet pile, filling sand bags outside the steel sheet pile or filling battens, cotton wool and hemp wool inside the steel sheet pile;
s2, excavating a foundation pit by adopting an excavator, installing a first inner support at a position 1.8m below the ground elevation, welding a short steel bracket bearing the dead weight of the enclosing purlin below the installation position of the first inner support, hanging the enclosing purlin steel on the short steel bracket, installing a steel angle support according to design requirements, and welding the joint positions of the enclosing purlin steel and the steel angle support by using a triangular stiffening plate;
s3, excavating a soil layer in the foundation pit to the elevation of the top of the bearing platform, installing a second inner support at the position 0.5m above the elevation of the top of the bearing platform, and repeating the installation step of the first inner support;
s4, continuously excavating a soil layer in the foundation pit to the elevation position of the bottom of the bearing platform, hoisting the excavator into the foundation pit when the depth of the foundation pit is 3.5m, loading the residual earthwork in the foundation pit into a powder hopper of the excavator, transporting the residual earthwork out of the foundation pit, and manually cleaning the residual earthwork in the foundation pit; paving a foundation pit cushion layer by adopting C20 concrete, wherein the thickness of the foundation pit cushion layer is 0.1m;
in the process of excavation of the foundation pit, the leakage and piping phenomena in the foundation pit are stopped by sawdust, coal ash and cotton wool, a water pump is arranged according to the seepage quantity, and accumulated water is sucked at fixed time;
s5, binding bearing platform reinforcing steel bars, mounting bearing platform reinforcing steel bars and bearing platform templates on the foundation pit cushion layer, and pouring concrete in the bearing platform templates;
s6, dismantling the bearing platform template and the steel sheet pile.
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 (4)
1. Bearing platform deep basal pit construction equipment, including base (1) and be fixed in drain pump (15) on base (1), its characterized in that: the device is characterized in that a water stop plate (3) which is abutted to the ground is arranged on the base (1), a driving device for driving the water stop plate (3) to be abutted to the inner side surface of a steel sheet pile is arranged on the base (1), a test box (7) is arranged on the inner side surface of the water stop plate (3), a laser (71) is fixed on the top surface of the test box (7), a storage battery (79) and a sleeve (72) are fixed on the inner bottom surface of the test box (7), a water inlet through groove (73) which is communicated with the sleeve (72) is formed in the bottom surface of the test box (7), a floating ball (74) is vertically slidably arranged in the sleeve (72), a first movable block (77) is fixed on the top of the floating ball (74), a second supporting block (78) which can be electrically contacted with the first movable block (77) is fixed on the inner top surface of the test box (7), and the second supporting block (78) is electrically connected with the laser (71);
the novel threaded rod comprises a base (1), and is characterized in that a first threaded rod (11) is rotatably installed on the base (1), a moving block (2) is sleeved on the outer circumferential surface of the first threaded rod (11), a cavity (22) is formed in the moving block (2), a limit groove (232) is formed in the inner side surface of the cavity (22), a limit block (23) is slidably installed on the moving block (2) along the width direction of the moving block through the limit groove (232), a rotating disc (21) is rotatably installed in the cavity (22), the rotating disc (21) is in threaded connection with the first threaded rod (11), a connecting groove (211) for inserting the limit block (23) is formed in the outer circumferential surface of the rotating disc (21), a guide rod (12) is fixed on the base (1), the guide rod (12) penetrates through the moving block (2) and is parallel to the first threaded rod (11), and a control component for driving the first threaded rod (11) to rotate is arranged on the base (1).
Reset blocks (26) are fixed on two sides of the limiting block (23), reset grooves (261) are formed on two sides of the limiting groove (232), the reset blocks (26) are connected with the moving blocks (2) in a sliding mode along the width direction of the moving blocks (2) through the reset grooves (261), springs I (262) are fixed on the side face, away from the rotating disc (21), of the reset blocks (26), and one ends, away from the reset blocks (26), of the springs I (262) are fixedly connected with the inner side face, away from the rotating disc (21), of the reset grooves (261);
the control assembly comprises a first stepping motor (16) fixed on the base (1), an output shaft of the first stepping motor (16) is fixedly connected with one end of the first threaded rod (11), a plurality of electromagnets (13) are fixed on the outer circumferential surface of the guide rod (12), the electromagnets (13) are arranged at equal intervals along the axial direction of the guide rod (12), and a magnetic block (231) which can be mutually attracted with the electromagnets (13) is fixed on the side surface of the limiting block (23) away from the rotating disc (21);
the driving device comprises a reciprocating screw (36) rotatably mounted on the moving block (2), the water stop plate (3) comprises a containment plate (31) and two pressing plates (32) fixed on the containment plate (31) and close to the side face of the steel sheet pile, the side face of the pressing plates (32) away from the containment plate (31) can be abutted against the steel sheet pile, the containment plate (31) is in threaded connection with the reciprocating screw (36), a first bevel gear (24) and a second bevel gear (25) which are meshed with each other are rotatably mounted in the cavity (22), the second bevel gear (25) is sleeved and fixed on the outer peripheral face of the reciprocating screw (36), the first bevel gear (24) is sleeved and arranged on the outer periphery of the first threaded rod (11), a clamping block (241) is fixed on the inner peripheral face of the first bevel gear (24), a clamping groove (111) for inserting the clamping block (241) is formed in the outer peripheral face of the first threaded rod (11), and the clamping groove (111) is arranged along the length direction of the first threaded rod (11).
The utility model discloses a test pile, including moving block (2), apron board (31), threaded rod (33) are installed in the side of apron board (31), apron board (31) keep away from one side of moving block (2) is provided with baffle (5) with ground looks butt, reciprocating screw (36) keep away from one end of moving block (2) with baffle (5) rotate and are connected, abutment groove (51) have been seted up to the side that baffle (5) is close to moving block (2), baffle (5) pass through abutment groove (51) are installed along vertical slip butt plate (52), apron board (31) keep away from side of moving block (2) has been seted up spout (35), apron board (31) are passed through spout (35) are installed along vertical slip slider (34), threaded rod (33) are installed in the last rotation of apron board (31), threaded rod (34) with threaded rod (33) threaded connection, the top of apron board (31) is fixed with step motor (37) with the top fixed connection of threaded rod (33), slider (34) are close to baffle (5) are installed in the side control block (4) and are connected with test pile (4), the control block (4) is provided with a driving block (42) in a sliding manner along the width direction of the driving groove (41), the inner top surface of the driving groove (41) is provided with a mounting groove (43), the control block (4) is provided with a first moving sheet (44) in a sliding manner along the width direction of the control block (43), the side surface, close to the steel sheet pile, of the mounting groove (43) is fixedly provided with a second moving sheet (45), the side surface, far away from the steel sheet pile, of the mounting groove (43) is fixedly provided with a first moving sheet (46), the first moving sheet (44) is electrically connected with a power supply (14), the first moving sheet (45) is electrically connected with a first stepping motor (16), the second moving sheet (46) is electrically connected with a second stepping motor (37), the side surface, far away from the steel sheet pile, of the driving block (42) is fixedly provided with a second spring (47), and one end, far away from the driving block (42), of the second spring is fixedly connected with the side surface, far away from the steel sheet pile, of the driving groove (41).
The side that butt board (52) is close to control board (4) is fixed with installation piece (57), the bottom surface of control board (4) can with the top surface butt of installation piece (57), the apron board (31) is close to side of baffle (5) has been seted up and has been let down groove (48), apron board (31) are passed through it slides along self width direction to give down groove (48) and install and let down piece (49), butt board (52) are close to the side of apron board (31) has been seted up and have been used for inserting and have been set down positioning groove (53) of piece (49) of giving down, the side that the piece (49) of giving down is kept away from butt board (52) is fixed with spring three (491), spring three (491) are kept away from the one end that gives down piece (49) with give down groove (48) are kept away from the side fixed connection of butt board (52).
2. The cap deep foundation pit construction equipment of claim 1, wherein: the side that butt plate (52) kept away from containment sheet (31) is fixed with forked tail piece (54), butt groove (51) are kept away from the side of containment sheet (31) has seted up forked tail groove (55), forked tail piece (54) pass through forked tail groove (55) along vertical with baffle (5) are slided and are connected, the bottom surface of forked tail piece (54) is fixed with spring four (56), the bottom of spring four (56) with the bottom surface fixed connection of forked tail groove (55).
3. The cap deep foundation pit construction equipment of claim 1, wherein: the movable block (2) is internally provided with a pushing groove (64), the movable block (2) is slidably connected with the movable block (2) along the width direction of the movable block (2) through the pushing groove (64), the pushing plate (62) is close to a pushing rod (63) fixed on the side face of the water-stop plate (3), the movable block (2) is close to the side face of the water-stop plate (3) and is provided with a carry through groove (65) communicated with the pushing groove (64), the pushing rod (63) is fixedly connected with a fixed block (61) in electrical contact with the movable block (6) through the carry through groove (65) along the width direction of the movable block (2), the pushing plate (62) is far away from the side face of the water-stop plate (3), the spring (66) is far away from one end of the water-stop plate (3) and the inner side face of the pushing groove (64) are fixedly connected, the fixed block (61) is fixedly connected with the fixed block (1) in electrical contact with the power supply (14), and the electromagnet (14) are electrically connected with the electromagnet (14).
4. A construction process of a deep foundation pit construction equipment of a bearing platform according to any one of claims 1 to 3, which is characterized in that: the method comprises the following steps:
s1, welding a guide frame on a positioning pile by using a drilling platform, inserting and driving a first steel sheet pile at a position close to the center of a cofferdam transverse bridge, and symmetrically inserting and driving the steel sheet piles at two sides respectively by taking the first steel sheet pile as a center line; after the steel sheet pile is inserted and driven, folding the steel sheet pile nearby the downstream corner pile; removing water seepage and surface precipitation in the cofferdam by using a water pump, checking whether the steel sheet piles leak water or not, and treating the leaking part;
s2, draining and excavating a soil layer in the foundation pit to a position 1.8m below the ground elevation, and installing a first inner support at a position 1.8m below the ground elevation;
s3, draining and excavating an inner soil layer of the foundation pit to the elevation of the top of the bearing platform, and installing a second inner support at the position 0.5m above the elevation of the top of the bearing platform;
s4, continuously excavating a soil layer in the foundation pit to the elevation position of the bottom of the bearing platform, cleaning slag soil and broken stone at the bottom of the foundation pit, and pouring concrete at the bottom of the foundation pit to form a foundation pit cushion layer;
s5, binding bearing platform reinforcing steel bars, mounting bearing platform reinforcing steel bars and bearing platform templates on the foundation pit cushion layer, and pouring concrete in the bearing platform templates;
s6, dismantling the bearing platform template and the steel sheet pile.
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