CN116770874A - Deep foundation pit water lowering and draining method - Google Patents
Deep foundation pit water lowering and draining method Download PDFInfo
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- CN116770874A CN116770874A CN202310713874.0A CN202310713874A CN116770874A CN 116770874 A CN116770874 A CN 116770874A CN 202310713874 A CN202310713874 A CN 202310713874A CN 116770874 A CN116770874 A CN 116770874A
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- fixedly connected
- foundation pit
- side wall
- plate
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 205
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004140 cleaning Methods 0.000 claims abstract description 50
- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 239000004575 stone Substances 0.000 claims abstract description 5
- 230000006698 induction Effects 0.000 claims description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- 230000010405 clearance mechanism Effects 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000758 substrate Substances 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
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention belongs to the technical field of foundation pit dewatering and drainage, and particularly relates to a deep foundation pit dewatering and drainage method, which comprises the following steps: s1, arranging a circle of steel sheet piles around a foundation pit to locally intercept water; s2, digging drainage ditches with a certain gradient around the foundation pit; s3, arranging water collecting wells with crushed stone water filtering layers paved at the bottoms at four corners of the foundation pit; s4, arranging four drainage assemblies with automatic cleaning and blocking functions at a flat position above the foundation pit, and then placing the water inlet end of the drainage assemblies into a water collecting well to pump water. According to the invention, after accumulated water in the deep foundation pit is collected into the water collecting well, the accumulated water in the water collecting well is discharged by the water pump, the water inlet of the water pump is automatically converted after the water inlet end of the water pump is blocked, and the filter screen on the inner side of the original water inlet is automatically cleaned, so that manual cleaning is not needed, the drainage efficiency of the foundation pit is ensured, and the workload of operators is reduced.
Description
Technical Field
The invention belongs to the technical field of foundation pit dewatering and drainage, and particularly relates to a deep foundation pit dewatering and drainage method.
Background
The foundation pit is a soil pit excavated according to the substrate elevation and the foundation plane size at a foundation design position, after the foundation pit is excavated, the foundation pit needs to be kept in a dry state, particularly when the deep foundation pit is excavated, after the deep foundation pit is excavated, water accumulation can be generated in the foundation pit due to groundwater and rainy precipitation, and special attention is required to be paid to protecting measures when the deep foundation pit is excavated in order to avoid the phenomenon of sand and water burst of the foundation pit caused by water accumulation.
When the existing foundation pit is used for lowering and draining water, the following defects exist:
when there is water in the foundation ditch, can dig the escape canal that has certain slope around the foundation ditch generally, and set up a plurality of sump shafts in the escape canal, make ponding flow into the sump shaft along the escape canal in, then utilize the ponding in the sump shaft to take away by the water pump, because reasons such as rainfall scour, there are impurity such as a large amount of grit particles in the sump shaft, in order to avoid impurity to get into the water pump and cause the problem that the water pump damaged, can set up the filter screen at the tip of inlet tube generally, the water pump is when drawing water, some impurity can block into in the filter screen under the drive of rivers, thereby the size of water inlet has been reduced, the speed that leads to the water pump to draw water slows down, and difficult by the timely discovery clearance of operating personnel, influence the efficiency of foundation ditch drainage, after the filter screen appears blocking, still need manual work clear up, operating personnel's work load has been increased.
Therefore, we propose a deep foundation pit water lowering and draining method to solve the above problems.
Disclosure of Invention
The invention aims at providing a deep foundation pit water lowering and draining method aiming at the problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a deep foundation pit water lowering and draining method comprises the following steps:
s1, arranging a circle of steel sheet piles around a foundation pit to locally intercept water;
s2, digging a drainage ditch with a certain gradient around the foundation pit, wherein the depth of the drainage ditch is 0.5-0.8m, the width of the drainage ditch is equal to or larger than 0.4m, the gradient ratio of the side slope of the drainage ditch is 1:1-1:0.5, and the drainage ditch is provided with a minimum longitudinal slope of 0.2-0.5%;
s3, arranging water collecting wells at four corners of the foundation pit, wherein the width of each water collecting well is 0.6-0.8m, the depth of each water collecting well is kept to be 0.8-1.0m lower than the soil digging surface, and paving a broken stone water filtering layer at the bottom of each water collecting well;
s4, arranging four drainage assemblies with automatic blockage cleaning functions at a flat position above the foundation pit, and then placing the water inlet end of the drainage assemblies into a water collecting well for pumping water;
above-mentioned drainage subassembly is including removing the seat, the last lateral wall fixedly connected with water pump that removes the seat, the inlet end of water pump has the inlet tube through the fixed intercommunication of ring flange, the left end fixed intercommunication of inlet tube has the tubular metal resonator, be equipped with induction system in the tubular metal resonator, the lower extreme intercommunication of tubular metal resonator has the water suction pipe, the lower extreme fixed intercommunication of water suction pipe has the suction head, the below of suction head is equipped with self-cleaning mechanism.
Preferably, the induction mechanism comprises a connecting plate and two rotating plates, the connecting plate is fixedly connected to the inner wall of the metal tube, the rotating plates are symmetrically hinged to the upper side wall of the connecting plate, the same spring is fixedly connected between the rotating plates and the connecting plate, two water outlets are formed in the side wall of the connecting plate, connecting frames are fixedly connected to the upper side walls of the two rotating plates, connecting rods are rotatably connected to the inner walls of the connecting frames, the connecting rods are located on the left side, induction cylinders are fixedly connected to the right side, circular plates are fixedly connected to the left ends of the connecting rods, sliding rods matched with the induction cylinders are fixedly connected to the left side walls of the circular plates, the left ends of the sliding rods are located in the induction cylinders, connecting frames are fixedly connected to the same spring, conductive blocks are fixedly connected to the upper side walls of the connecting frames, and conductive plates are inlaid in the upper side inner walls of the induction cylinders.
Preferably, the self-cleaning mechanism comprises a cleaning block and a movable box, the cleaning block is positioned below the suction head, the movable box is fixedly connected to the right side of the cleaning block, the inner wall of the movable box is rotationally connected with a reciprocating screw rod, the front side wall of the movable box is fixedly connected with a waterproof motor, the output end of the waterproof motor is fixedly connected with the reciprocating screw rod, a screw thread cylinder is sleeved on the rod wall of the reciprocating screw rod, the upper side wall of the screw thread cylinder is fixedly connected with a guide plate, the upper side wall of the movable box is provided with a guide opening matched with the guide plate, the upper side wall of the guide plate extends out of the guide opening and is fixedly connected with the suction head through a movable frame, the conductive block is electrically connected with an external power supply, the conductive plate is electrically connected with the waterproof motor through a timing switch, the left side wall of the cleaning block is provided with two water inlet grooves, the upper side wall of the water inlet tank is provided with a vertical hole which is mutually matched with the water suction head, the inner wall of the water inlet tank is inlaid with a filter screen positioned below the vertical hole, the inside of the cleaning block is provided with two water cavities, a through hole is formed between the water cavity and the vertical hole, the left side wall of the cleaning block is fixedly connected with a first hydraulic cylinder, the output end of the first hydraulic cylinder is positioned in the water cavity and is fixedly connected with a sealing plate, the right side wall of the water inlet tank is fixedly connected with a second hydraulic cylinder, the output end of the second hydraulic cylinder is fixedly connected with a pushing plate, the right side of the lower side wall of the water suction head is inlaid with an upper copper plate, the right side of the upper side wall of the cleaning block is inlaid with two lower copper plates, the two lower copper plates are respectively and electrically connected with the two second hydraulic cylinders through travel switches, the inner wall of the upper side of the water inlet tank is fixedly connected with two pressing switches, the left side of the push switch is electrically connected with a forward circuit of the first hydraulic cylinder through the power-off time delay relay, the right side of the push switch is electrically connected with a reverse circuit of the first hydraulic cylinder through the timing switch, two storage tanks are formed in the right side of the cleaning block, and a feed inlet is formed between the storage tanks and the feed inlet.
Preferably, the right side wall of the water inlet tank is provided with a water outlet hole, and the inner wall of the upper side of the water inlet tank is fixedly connected with an inclined baffle plate positioned outside the water outlet hole.
Preferably, the upper side wall of the cleaning block is fixedly connected with two vertical plates in a front-back symmetrical mode, and the side walls of the opposite sides of the two vertical plates are fixedly connected with sealing cylinders through elastic rods.
Preferably, two lower guide blocks are inlaid on the left side of the upper side wall of the cleaning block, an upper guide block is inlaid on the left side of the lower side wall of the suction head, the upper guide block is electrically connected with an external power supply, the lower guide block is electrically connected with a water pump, a waterproof ring is fixedly connected with the lower side wall of the suction head, and a waterproof sleeve is fixedly sleeved on the outer wall of the suction head.
Preferably, the right side wall of the cleaning block is hinged with a cover plate covered outside the storage tank, two sliding cavities are formed in the cleaning block, the inner wall of each sliding cavity is fixedly connected with a sliding block through a spring, the right side wall of each sliding block is fixedly connected with a clamping plate, and the right side of each clamping plate extends out of each sliding cavity.
Preferably, the same waterproof cylinder is fixedly connected to the side wall of one side opposite to the circular plate and the induction cylinder, and the waterproof cylinder is made of waterproof rubber.
Compared with the prior art, the deep foundation pit water lowering and draining method has the advantages that:
1. through the removal seat, water pump, inlet tube, tubular metal resonator, induction system and the self-cleaning mechanism that set up, can be after collecting the ponding in the deep basal pit to the sump pit, utilize the water pump to discharge ponding in the sump pit to after the inlet end of water pump blocks up, with the water inlet of automatic conversion water pump, and to the inboard filter screen automatic clear up of original water inlet, need not the manual work to clear up, when guaranteeing foundation ditch drainage efficiency, also reduced operating personnel's work load.
2. Through holding vessel, feed inlet, apopore, the inclined baffle that sets up, can be after clear up impurity, can collect impurity, avoid impurity to fall into in the aquatic again, when carrying out the drainage subsequently, impurity still can block up the problem of filter screen.
3. Through filter screen, water cavity, through-hole, first pneumatic cylinder, the closing plate that set up, can be when clearing up the inside impurity of filter screen, adopt the method of flushing from the top to can make impurity in the filter screen drop down entirely, avoid the clean up problem that influences ponding trafficability characteristic.
Drawings
FIG. 1 is a schematic structural diagram of a deep foundation pit water-lowering and draining method provided by the invention;
FIG. 2 is a schematic structural diagram of an induction mechanism in a deep foundation pit water-lowering and draining method provided by the invention;
FIG. 3 is a schematic diagram of the internal structure of an induction cylinder in the deep foundation pit water-lowering and draining method provided by the invention;
FIG. 4 is a schematic diagram of the internal structure of a mobile box in the deep foundation pit water-lowering and draining method provided by the invention;
FIG. 5 is a schematic structural view of a self-cleaning mechanism in a deep foundation pit water-lowering and draining method provided by the invention;
FIG. 6 is a schematic diagram showing the opening and closing modes of a storage tank in the deep foundation pit water-lowering and draining method provided by the invention;
FIG. 7 is a schematic diagram of the positional relationship between a seal cylinder and a cleaning block in the deep foundation pit water-lowering and draining method provided by the invention;
fig. 8 is a flow chart of the method of the present invention.
In the figure: 1 moving seat, 2 water pump, 3 water inlet pipe, 4 metal pipe, 5 induction mechanism, 501 connecting plate, 502 rotating plate, 6 water outlet, 7 connecting frame, 8 connecting rod, 9 induction cylinder, 10 circular plate, 11 sliding rod, 12 connecting frame, 13 conducting block, 14 conducting plate, 15 upper copper plate, 16 lower copper plate, 25 water suction pipe, 26 water suction head, 27 self-cleaning mechanism, 271 cleaning block, 272 moving box, 28 reciprocating screw rod, 29 waterproof motor, 30 screw thread cylinder, 31 guide plate, 32 water inlet groove, 33 vertical hole, 34 filter screen, 35 water cavity, 36 through hole, 37 first hydraulic cylinder, 38 sealing plate, 39 second hydraulic cylinder, 40 pushing plate, 41 pressing switch, 42 storage groove, 43 feed inlet, 44 water outlet hole, 45 inclined baffle, 46 vertical plate, 47 sealing cylinder, 48 lower guide block, 49 upper guide block, 50 waterproof ring, 51 waterproof sleeve, 52 cover plate, 53 sliding cavity, 54 sliding block, 55 clamping plate, 56 waterproof cylinder.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1-8, a deep foundation pit water lowering and draining method comprises the following steps:
s1, arranging a circle of steel sheet piles around a foundation pit to locally intercept water;
s2, digging a drainage ditch with a certain gradient around the foundation pit, wherein the depth of the drainage ditch is 0.5-0.8m, the width of the drainage ditch is equal to or larger than 0.4m, the gradient ratio of the side slope of the drainage ditch is 1:1-1:0.5, and the drainage ditch is provided with a minimum longitudinal slope of 0.2-0.5%;
s3, arranging water collecting wells at four corners of the foundation pit, wherein the width of each water collecting well is 0.6-0.8m, the depth of each water collecting well is kept to be 0.8-1.0m lower than the soil digging surface, and paving a broken stone water filtering layer at the bottom of each water collecting well;
s4, arranging four drainage assemblies with automatic blockage cleaning functions at a flat position above the foundation pit, and then placing the water inlet end of the drainage assemblies into a water collecting well for pumping water;
the drainage assembly comprises a movable seat 1, the upper side wall of the movable seat 1 is fixedly connected with a water pump 2, the water inlet end of the water pump 2 is fixedly communicated with a water inlet pipe 3 through a flange plate, the left end of the water inlet pipe 3 is fixedly communicated with a metal pipe 4, an induction mechanism 5 is arranged in the metal pipe 4, the lower end of the metal pipe 4 is communicated with a water suction pipe 25, the lower end of the water suction pipe 25 is fixedly communicated with a water suction head 26, and a self-cleaning mechanism 27 is arranged below the water suction head 26.
The induction mechanism 5 comprises a connecting plate 501 and two rotating plates 502, wherein the connecting plate 501 is fixedly connected to the inner wall of a metal pipe 4, the rotating plates 502 are symmetrically hinged to the upper side wall of the connecting plate 501, the same spring is fixedly connected between the rotating plates 502 and the connecting plate 501, two water outlets 6 are formed in the side wall of the connecting plate 501, the upper side walls of the two rotating plates 502 are fixedly connected with connecting frames 7, connecting rods 8 are rotatably connected to the inner walls of the two connecting frames 7, the right end of each connecting rod 8 is fixedly connected with an induction cylinder 9, the left end of each connecting rod 8 is fixedly connected with a circular plate 10, the left side wall of each circular plate 10 is fixedly connected with a sliding rod 11 which is matched with the induction cylinder 9, the left end of each sliding rod 11 is positioned in each induction cylinder 9, a connecting frame 12 is fixedly connected with the same spring, the upper side wall of each connecting frame 12 is fixedly connected with a conductive block 13, and the upper side inner wall of each induction cylinder 9 is inlaid with a conductive plate 14, and the water flow speed of the water pump 2 can be induced.
The self-cleaning mechanism 27 comprises a cleaning block 271 and a movable box 272, wherein the cleaning block 271 is positioned below the suction head 26, the movable box 272 is fixedly connected to the right side of the cleaning block 271, the inner wall of the movable box 272 is rotationally connected with a reciprocating screw rod 28, the front side wall of the movable box 272 is fixedly connected with a waterproof motor 29, the output end of the waterproof motor 29 is fixedly connected with the reciprocating screw rod 28, a threaded cylinder 30 is sleeved on the rod wall of the reciprocating screw rod 28, the upper side wall of the threaded cylinder 30 is fixedly connected with a guide plate 31, the upper side wall of the movable box 272 is provided with a guide opening matched with the guide plate 31, the upper side wall of the guide plate 31 extends out of the guide opening and is fixedly connected with the suction head 26 through a movable frame, the conductive block 13 is electrically connected with an external power supply, the conductive plate 14 is electrically connected with the waterproof motor 29 through a timing switch, the left side wall of the cleaning block 271 is provided with two water inlet grooves 32, the upper side wall of the water inlet grooves 32 is provided with vertical holes 33 matched with the suction head 26, the filter screen 34 positioned below the vertical hole 33 is inlaid on the inner wall of the water inlet tank 32, two water cavities 35 are arranged in the cleaning block 271, a through hole 36 is arranged between the water cavities 35 and the vertical hole 33, the left side wall of the cleaning block 271 is fixedly connected with a first hydraulic cylinder 37, the output end of the first hydraulic cylinder 37 is positioned in the water cavity 35 and is fixedly connected with a sealing plate 38, the right side tank wall of the water inlet tank 32 is fixedly connected with a second hydraulic cylinder 39, the output end of the second hydraulic cylinder 39 is fixedly connected with a pushing plate 40, an upper copper plate 15 is inlaid on the right side of the lower side wall of the water suction head 26, two lower copper plates 16 are inlaid on the right side of the upper side wall of the cleaning block 271, the conductive plate 14 is electrically connected with the upper copper plate 15, the two lower copper plates 16 are respectively electrically connected with the two second hydraulic cylinders 39 through travel switches, the upper side inner wall of the water inlet tank 32 is fixedly connected with two pressing switches 41, the forward circuit electric connection that is located left side push switch 41 through outage delay relay and first pneumatic cylinder 37, the reverse circuit electric connection that is located right side push switch 41 through timing switch and first pneumatic cylinder 37, two holding tanks 42 have been seted up on the right side of cleaning block 271, feed inlet 43 has been seted up between holding tank 42 and the intake channel 32, the filter screen 34 to original water inlet inboard is automatic to be cleared up, need not the manual work to clear up.
The water outlet hole 44 is formed in the right side wall of the water inlet groove 32, and the inclined baffle 45 positioned outside the water outlet hole 44 is fixedly connected to the inner wall of the upper side of the water inlet groove 32, so that impurities are prevented from being discharged from the water outlet hole 44.
The upper side wall of the cleaning block 271 is fixedly connected with two risers 46 in a front-back symmetrical manner, the side walls of the opposite sides of the two risers 46 are fixedly connected with sealing drums 47 through elastic rods, and after the suction head 26 is removed, the vertical holes 33 of the sides can be automatically plugged, so that impurities are prevented from falling into the vertical holes 33.
The upper side wall left side of clearance piece 271 is inlayed and is had two lower guide blocks 48, and the lower side wall left side of suction head 26 is inlayed and is had guide blocks 49, goes up guide blocks 49 and external power source electric connection, lower guide blocks 48 and water pump 2 electric connection, the lower side wall fixedly connected with waterproof circle 50 of suction head 26, the fixed cover of outer wall of suction head 26 is equipped with waterproof cover 51, can be when suction head 26 removes, the circuit of automatic disconnection water pump 2.
The right side wall of cleaning block 271 articulates has the apron 52 of cover outside holding tank 42, and two sliding chamber 53 have been seted up to the inside of cleaning block 271, and the inner wall in sliding chamber 53 passes through spring fixedly connected with sliding block 54, and the right side wall fixedly connected with cardboard 55 of sliding block 54, and the sliding chamber 53 is stretched out on the right side of cardboard 55, conveniently clears up the impurity in the holding tank 42.
The same waterproof cylinder 56 is fixedly connected to the side wall of one side opposite to the circular plate 10 and the induction cylinder 9, the waterproof cylinder 56 is made of waterproof rubber, and potential safety hazards of electric shock of operators in the process that accumulated water enters the induction cylinder 9 are avoided.
The principle of operation of the present invention will now be described as follows: when the deep foundation pit with the depth of 4-7m is subjected to water lowering and draining, a circle of steel sheet piles are arranged around the foundation pit for local water interception; digging a drainage ditch with a certain gradient around the foundation pit, wherein the depth of the drainage ditch is 0.5-0.8m, the width of the drainage ditch is equal to or larger than 0.4m, the slope gradient ratio of the drainage ditch is 1:1-1:0.5, and the drainage ditch is provided with a minimum longitudinal slope of 0.2% -0.5%; setting water collecting wells at four corners of the foundation pit, wherein the width of the water collecting wells is 0.6-0.8m, the depth of the water collecting wells is kept to be lower than the soil digging surface by 0.8-1.0m, and paving a broken stone water filtering layer at the bottom of the water collecting wells; then the movable seat 1 is moved to a position above the foundation pit, the cleaning block 271 is placed in a water collecting well, the water inlet pipe 3 and the water pump 2 are connected through a flange plate, then the water collecting well works through an external button and the water pump 2, accumulated water in the water collecting well is discharged out of the foundation pit along the water inlet groove 32, the vertical hole 33, the water suction head 26, the metal pipe 4, the water suction pipe 25, the water inlet pipe 3 and the water outlet end of the water pump 2 under the negative pressure of the water pump 2, impurities in the accumulated water can be filtered by the filter screen 34, the external control button is electrically connected with the conductive block 13 through an electrifying delay relay, when water flows through the water outlet 6 in the metal pipe 4, the water flows impact the rotating plates 502 on two sides, the two rotating plates 502 rotate towards directions approaching each other, and when the two rotating towards directions approaching each other, the two rotating plates 502 are matched through the transmission of the connecting frame 7 and the connecting rod 8, the sliding rod 11 drives the connecting frame 12 and the conductive block 13 to move towards the left side of the induction cylinder 9, the conductive block 13 is separated from the conductive block 14, and the external power supply is connected with the conductive block 13 under the electrifying delay relay 13 after the conductive block 13 and the conductive block 14 are separated for about three seconds;
when the impurity filtered by the filter screen 34 is more and more, the trafficability of the filter screen 34 is reduced, the drainage capacity of the water pump 2 is reduced, the water flow passing through the water outlet 6 is reduced, the impact force of the water flow to the two rotating plates 502 is reduced, the connecting frame 12 and the induction cylinder 9 are relatively displaced under the action of the elastic force of the spring, the connecting frame 12 drives the conductive block 13 to move rightwards, the conductive block 13 is contacted with the conductive plate 14, when the conductive block 13 is contacted with the conductive plate 14, the waterproof motor 29 is controlled to work for a certain time through the timing switch, the waterproof motor 29 drives the reciprocating screw rod 28 to rotate, the screw cylinder 30 is driven to move through the screw thread fit, the guide plate 31 and the moving frame drive the water suction head 26 to move to the direction of the other vertical hole 33, the sealing cylinder 47 at the position is restored to the original position under the elastic force of the elastic rod after the water suction head is removed, the upper part of the vertical hole 33 is sealed, the upper copper plate 15 is electrically connected with the conductive plate 14, when the conductive plate 14 is contacted with the conductive block 13, the lower copper plate 16 guides current to the second hydraulic cylinder 39, and the second hydraulic cylinder 39 is controlled to reciprocate once through the travel switch, the second hydraulic cylinder 39 drives the pushing plate 40 to move leftwards to a set distance, presses the left push switch 41 and retracts, the left push switch 41 is electrically connected with the forward circuit of the first hydraulic cylinder 37 through the power-off delay relay, so that the first hydraulic cylinder 37 is started, the moving speed of the first hydraulic cylinder 37 is higher than the moving speed of the second hydraulic cylinder 39, the first hydraulic cylinder 37 drives the sealing plate 38 to move, the sealing plate 38 discharges water stored in the water cavity 35 into the vertical hole 33 through the through hole 36, the upper part of the vertical hole 33 is blocked by the sealing cylinder 47, the stored water can only be discharged from the lower part of the vertical hole 33, and wash away the impurity that blocks up in the filter screen 34, the water storage can be followed the apopore 44 in the intake channel 32 and discharged, the impurity in the filter screen 34 can fall to the right side of pushing away flitch 40, and be blocked by inclined baffle 45, prevent that the impurity from being discharged from apopore 44, the impurity can drop to the holding vessel 42 under the effect of gravity and store, make things convenient for the operating personnel to clear up subsequently, after pushing away flitch 40 returns to the normal position, can extrude the push switch 41 on right side, the push switch 41 on right side passes through the positive circuit electric connection of time switch and first pneumatic cylinder 37, make first pneumatic cylinder 37 drive closing plate 38 and return to the normal position, when closing plate 38 returns, a portion ponding can enter into the water cavity 35 through-hole 36 under the effect of atmospheric pressure and store, the downside clearance is convenient.
When the suction head 26 moves, the suction head 26 drives the upper guide block 49 to be separated from the lower guide block 48 at the side, so that a circuit of the water pump 2 is disconnected, the water pump 2 is stopped to work, when the suction head 26 moves to the vertical hole 33 at the other side, the suction head 26 pushes the sealing cylinder 47 at the position to one side, the upper guide block 49 below the suction head 26 is firstly contacted with the lower guide block 48 at the position and always keeps a contact state through designing the area of the upper guide block 49 and the area of the lower guide block 48, then the upper copper plate 15 is contacted with the lower copper plate 16 at the position, the upper guide block 49 is contacted with the lower guide block 48 at the position, the circuit of the water pump 2 is communicated again, the water pump 2 is continuously discharged, so that the conductive block 13 and the conductive plate 14 are separated in a sliding way relatively, after the filter screen 34 at the position is blocked, the action is repeated to clean, and through designing the two water inlet grooves 32, the other water inlet grooves 32 can be used for working, so that the water drainage efficiency of a foundation pit is ensured, and all electronic devices of the device can be used normally in water.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (8)
1. The deep foundation pit water lowering and draining method is characterized by comprising the following steps of:
s1, arranging a circle of steel sheet piles around a foundation pit to locally intercept water;
s2, digging a drainage ditch with a certain gradient around the foundation pit, wherein the depth of the drainage ditch is 0.5-0.8m, the width of the drainage ditch is equal to or larger than 0.4m, the gradient ratio of the side slope of the drainage ditch is 1:1-1:0.5, and the drainage ditch is provided with a minimum longitudinal slope of 0.2-0.5%;
s3, arranging water collecting wells at four corners of the foundation pit, wherein the width of each water collecting well is 0.6-0.8m, the depth of each water collecting well is kept to be 0.8-1.0m lower than the soil digging surface, and paving a broken stone water filtering layer at the bottom of each water collecting well;
s4, arranging four drainage assemblies with automatic blockage cleaning functions at a flat position above the foundation pit, and then placing the water inlet end of the drainage assemblies into a water collecting well for pumping water;
above-mentioned drainage subassembly is including removing seat (1), the last lateral wall fixedly connected with water pump (2) of removing seat (1), the inlet end of water pump (2) is through ring flange fixed intercommunication has inlet tube (3), the left end fixed intercommunication of inlet tube (3) has tubular metal resonator (4), be equipped with induction mechanism (5) in tubular metal resonator (4), the lower extreme intercommunication of tubular metal resonator (4) has water suction pipe (25), the lower extreme fixed intercommunication of water suction pipe (25) has water suction head (26), the below of water suction head (26) is equipped with from clearance mechanism (27).
2. The deep foundation pit dewatering and drainage method according to claim 1, wherein the induction mechanism (5) comprises a connecting plate (501) and two rotating plates (502), the connecting plate (501) is fixedly connected to the inner wall of the metal pipe (4), the rotating plates (502) are symmetrically hinged to the upper side wall of the connecting plate (501), the same spring is fixedly connected between the rotating plates (502) and the connecting plate (501), two water outlets (6) are formed in the side wall of the connecting plate (501), connecting frames (7) are fixedly connected to the upper side wall of the two rotating plates (502), connecting rods (8) are rotatably connected to the inner walls of the two connecting frames (7), induction cylinders (9) are fixedly connected to the right end of the connecting rods (8) at the left side, circular plates (10) are fixedly connected to the left end of the connecting rods (8), sliding rods (11) matched with the induction cylinders (9) are fixedly connected to the left side wall of the circular plates (10), the left end of each sliding rod (11) is located in the induction cylinders (9), connecting frames (12) are fixedly connected to the same side wall of the corresponding to the corresponding induction cylinders (12), the connecting frames (12) are fixedly connected to the connecting frames (12), the upper inner wall of the induction cylinder (9) is embedded with a conductive plate (14).
3. The deep foundation pit water lowering and draining method according to claim 2, wherein the self-cleaning mechanism (27) comprises a cleaning block (271) and a moving box (272), the cleaning block (271) is located below the water suction head (26), the moving box (272) is fixedly connected to the right side of the cleaning block (271), the inner wall of the moving box (272) is rotatably connected with a reciprocating screw rod (28), the front side wall of the moving box (272) is fixedly connected with a waterproof motor (29), the output end of the waterproof motor (29) is fixedly connected with the reciprocating screw rod (28), a threaded cylinder (30) is sleeved on the rod wall of the reciprocating screw rod (28), the upper side wall of the threaded cylinder (30) is fixedly connected with a guide plate (31), the upper side wall of the moving box (272) is provided with a guide opening matched with the guide plate (31), the upper side wall of the guide plate (31) is extended out of the guide opening, the guide plate is fixedly connected with the water suction head (26) through the moving frame, the conductive block (13) is electrically connected with an external power supply, the conductive block (14) is electrically connected with the water suction head (29) through the waterproof motor (26), the water suction head (32) is electrically connected with the water suction head (32) through the water suction head (26), the inner wall of the water inlet tank (32) is inlaid with a filter screen (34) positioned below a vertical hole (33), two water cavities (35) are formed in the cleaning block (271), a through hole (36) is formed between the water cavities (35) and the vertical hole (33), the left side wall of the cleaning block (271) is fixedly connected with a first hydraulic cylinder (37), the output end of the first hydraulic cylinder (37) is positioned in the water cavities (35) and is fixedly connected with a sealing plate (38), the right side tank wall of the water inlet tank (32) is fixedly connected with a second hydraulic cylinder (39), the output end of the second hydraulic cylinder (39) is fixedly connected with a pushing plate (40), the right side wall of the lower side wall of the water suction head (26) is inlaid with an upper copper plate (15), the right side wall of the upper side wall of the cleaning block (271) is inlaid with two lower copper plates (16), the conductive plate (14) is electrically connected with the upper copper plate (15), the two lower copper plates (16) are respectively electrically connected with two second hydraulic cylinders (39) through travel switches, the upper side wall of the water inlet tank (32) is electrically connected with a pressing circuit (41) through a reversing switch (41), and the upper side of the water inlet tank (32) is electrically connected with a pressing circuit (41), two storage tanks (42) are arranged on the right side of the cleaning block (271), and a feed inlet (43) is arranged between the storage tanks (42) and the water inlet tank (32).
4. The deep foundation pit water lowering and draining method according to claim 3, wherein the right side wall of the water inlet tank (32) is provided with a water outlet hole (44), and the upper side inner wall of the water inlet tank (32) is fixedly connected with an inclined baffle plate (45) positioned outside the water outlet hole (44).
5. A deep foundation pit dewatering and drainage method according to claim 3, wherein the upper side wall of the cleaning block (271) is fixedly connected with two risers (46) in a front-back symmetrical manner, and the side walls of opposite sides of the two risers (46) are fixedly connected with sealing cylinders (47) through elastic rods.
6. The deep foundation pit water lowering and draining method according to claim 3, wherein two lower guide blocks (48) are inlaid on the left side of the upper side wall of the cleaning block (271), an upper guide block (49) is inlaid on the left side of the lower side wall of the suction head (26), the upper guide block (49) is electrically connected with an external power supply, the lower guide block (48) is electrically connected with the water pump (2), a waterproof ring (50) is fixedly connected with the lower side wall of the suction head (26), and a waterproof sleeve (51) is fixedly sleeved on the outer wall of the suction head (26).
7. The deep foundation pit water lowering and draining method according to claim 3, wherein a cover plate (52) covered outside the storage groove (42) is hinged to the right side wall of the cleaning block (271), two sliding cavities (53) are formed in the cleaning block (271), sliding blocks (54) are fixedly connected to the inner walls of the sliding cavities (53) through springs, clamping plates (55) are fixedly connected to the right side wall of the sliding blocks (54), and the right sides of the clamping plates (55) extend out of the sliding cavities (53).
8. The deep foundation pit water lowering and draining method according to claim 2, wherein the same waterproof cylinder (56) is fixedly connected to the side wall of the opposite side of the circular plate (10) and the induction cylinder (9), and the waterproof cylinder (56) is made of waterproof rubber.
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