Foundation pit drainage structure and its construction method

Abstract

The present invention discloses a foundation pit drainage structure and its construction method, which relates to the technical field of foundation pit drainage. The invention includes a foundation pit, a drainage ditch, a sump, and a support frame; slopes are provided on the inner walls of the foundation pit; the sump is communicated with the drainage ditch; insertion holes are provided on the sides of the first side plate and the second side plate; a two-way pipe assembly is inserted and matched with the insertion hole on the first side plate; a second drain pipe is inserted and matched with the insertion hole on the second side plate; a filter element is arranged inside the sump; the filter element is connected to an external working water pump through a suction pipe; the two-way pipe assembly is connected to an external standby water pump through a suction pipe. With the gradual rise of the accumulated water level, the floating ball is driven to gradually rise along the guide rod, thereby driving the light-shielding plate to gradually rise. When the accumulated water overflows the groups of two-way pipe assemblies at the lowest layer, the light-shielding plate just blocks the infrared travel switch at the lowest layer, and the controller controls the corresponding external standby water pump to start, and the accumulated water is pumped away through the first water delivery pipe, improving the drainage efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit drainage, and in particular relates to a foundation pit drainage structure and a construction method thereof. Background Art

[0002] When excavating a foundation pit, in order to prevent the slope from becoming unstable, soil nail walls are often sprayed on the slope. Drainage pipes are pre-buried in the soil nail walls, and gauze for filtering mud and sand is stuffed in the drainage pipes, so that the water in the slope can be discharged into the drainage ditch through the drainage pipes and flow into the collection well.

[0003] After searching, a construction foundation pit drainage structure with the publication number CN113931193A has been found, which improves the problem of how to directly pump away rainwater on rainy days. It includes a drainage ditch and a water collection well connected to the drainage ditch. The water collection well is equipped with a water collection box with an upward opening. A pumping box with an upward opening is installed in the middle of the water collection box. A filter is installed between the water collection box and the pumping box. The water collection pipe is equipped with an adjustment member, which includes a first connection state that connects the drainage ditch with the water collection well, and a second connection state that connects the drainage ditch with the water collection pipe. This application enables relatively clear rainwater to directly enter the pumping box and be pumped away by the pump, thereby further reducing the situation where the pump pumps pump up mud and sand.

[0004] However, when there is a lot of water accumulated inside the slope, the amount of water discharged from the drainage pipe is greater than the amount of water discharged from the collection well, the accumulated water will gradually overflow the collection well, and the water can only be drained through the water pump in the collection well. The drainage efficiency is low. At this time, the filter net in the collection well fails, and the sludge in the accumulated water is easily pumped into the water pump. At the same time, as the accumulated water in the foundation pit rises, if the drainage is not timely, long-term immersion can easily cause collapse inside the foundation pit. Summary of the invention

[0005] The purpose of the present invention is to provide a foundation pit drainage structure, which drives the float to gradually rise along the guide rod through the gradual increase of the accumulated water level, thereby driving the shading plate to gradually rise. When the accumulated water overflows the groups of two-way pipe assemblies on the lowest layer, the shading plate just blocks the infrared travel switch on the lowest layer, and the controller controls the corresponding external standby water pump to start, and the accumulated water is pumped away through the first water pipe.

[0006] The present invention is a foundation pit drainage structure, including a foundation pit, a drainage ditch opened on the inner bottom surface of the foundation pit, and a sump well; slopes are provided on the inner walls of the foundation pit; the sump well is communicated with the drainage ditch; further included are: a support frame inserted on the inner bottom surface of the foundation pit; the support frame includes: two relatively arranged first side plates, and the two first side plates are arranged on the side surfaces of two opposite groups of slopes; two relatively arranged second side plates, and the two second side plates are arranged on the side surfaces of the other two opposite groups of slopes; the side surfaces of the first side plates and the second side plates are uniformly provided with insertion holes at a certain inclination angle downward; the insertion holes on the first side plates are in plug-in fit with a two-way pipe assembly; the insertion holes on the second side plates are in plug-in fit with a second drain pipe; a filter element is arranged inside the sump well; the filter element is connected with an external working water pump through a water suction pipe; the two-way pipe assemblies at the same height are all connected with an external standby water pump through a water suction pipe.

[0007] Further, a baffle is symmetrically and fixedly connected to the side surface of the first side plate; a plug-in groove is formed between the baffle and the first side plate; the second side plate is inserted into the plug-in grooves on the two first side plates.

[0008] Further, a diagonal support plate is symmetrically and fixedly connected to the side surface of the first side plate at a certain inclination angle; a fixed plate is fixedly connected between the bottom surfaces of the two diagonal support plates; positioning holes are provided on the surface of the fixed plate; first concrete columns are symmetrically cast on both sides of the sump well on the bottom surface of the foundation pit; the first concrete columns are in plug-in fit with the positioning holes.

[0009] Further, guide rods are symmetrically and fixedly connected to the surface of the fixed plate; floating balls are slidably fitted on the two guide rods; a T-shaped floating plate is fixedly connected between the two floating balls; a light-shielding plate is fixedly connected to the end of the T-shaped floating plate; a support plate is fixedly connected to the surface of the first side plate; a support board is fixedly connected to the surface of the support plate; infrared travel switches are provided on the support board from top to bottom; the distance between adjacent infrared travel switches is the same as the distance between adjacent insertion holes in the vertical direction.

[0010] Further, a controller is arranged on the side surface of the support board; the output end of the infrared travel switch is electrically connected to the controller; a floating ball liquid level gauge is arranged inside the sump well; the output end of the floating ball liquid level gauge is electrically connected to the controller; the output end of the controller is electrically connected to the external working water pump and each external standby water pump respectively.

[0011] Further, the filter element includes: a placement bucket, with a plurality of filter holes provided on the peripheral side surface and the inner bottom surface of the placement bucket; a water collection cavity is formed between the placement bucket and the sump well; a support rod is fixedly connected to the bottom of the placement bucket; a second water delivery pipe is provided through the top of the placement bucket; the second water delivery pipe is fixedly connected to an external working water pump through a water suction pipe; a sealing cover, which is inserted at the end of the sump well; a positioning plate is fixedly connected to the peripheral side surface of the sealing cover; second concrete columns are uniformly poured on the inner bottom surface of the foundation pit around the peripheral side surface of the sump well; the second concrete columns are in plug-in fit with the positioning plate; and a counterweight block is in plug-in fit with the second concrete columns.

[0012] Further, the two-way pipe assembly includes: a first drain pipe, which is in plug-in fit with the plug hole; a valve seat, which is arranged at the end of the first drain pipe; a connecting pipe, which is arranged at the end of the valve seat; a C-shaped pipe, with both ends of the C-shaped pipe respectively penetrating and arranged on the side surfaces of the valve seat and the connecting pipe; a first water delivery pipe is provided through the C-shaped pipe; the first water delivery pipe is fixedly connected to an external working water pump through a water suction pipe.

[0013] Further, a valve plate groove is provided on the side surface of the valve seat; a sliding sleeve is fixedly connected to the inner wall of the C-shaped pipe; a piston rod is slidably fitted inside the sliding sleeve; a return spring is fixedly connected between the piston rod and the sliding sleeve; a valve plate is fixedly connected to the end of the piston rod; and the valve plate is in sliding fit with the C-shaped pipe and the valve plate groove respectively.

[0014] A construction method for a foundation pit drainage structure includes the following steps:

[0015] SS01 By uniformly pouring second concrete columns on the inner bottom surface of the foundation pit around the peripheral side surface of the sump well, placing the placement bucket on the filter element into the sump well, inserting the positioning plate into the corresponding second concrete column, then inserting the counterweight block into the corresponding second concrete column to press the positioning plate tightly, and connecting the second water delivery pipe to an external working water pump through a water suction pipe;

[0016] SS02 By symmetrically pouring a plurality of first concrete columns on the inner bottom surface of the foundation pit on both sides of the sump well, inserting two groups of fixing plates into the corresponding first concrete columns respectively, spraying a soil nail wall on the slope, at this time, the two groups of first side plates are closely attached to the soil nail wall on the slope; by closely attaching the two groups of second side plates to the corresponding soil nail walls on the slope and inserting them along the insertion grooves, the assembly of the support frame is completed, realizing the support of the inner wall slope of the foundation pit and preventing the slope from collapsing;

[0017] SS03 inserts each group of second drain pipes into the soil nail wall on the slope through the corresponding insertion holes on the second side plate; inserts the first drain pipes on each group of tee pipe assemblies into the soil nail wall on the slope through the corresponding insertion holes on the first side plate; the accumulated water inside the slope is discharged into the drainage ditch through each group of first drain pipes and second drain pipes, and flows into the water collection cavity in the water collection well. The water in the water collection cavity is filtered through the filter holes on the placement bucket and enters the interior of the placement bucket; the external working water pump is controlled to start by the float level gauge in the water collection well, and the water inside the placement bucket is automatically pumped away through the water suction pipe.

[0018] SS04 When the accumulated water inside the slope is excessive and the water flowing into the foundation pit through each first drain pipe and second drain pipe is too large, resulting in the water inflow of the foundation pit being greater than the water discharge of the water collection well, causing the accumulated water to overflow the water collection well. As the water level of the accumulated water gradually rises, it drives the float to gradually rise along the guide rod, thereby driving the light shielding plate to gradually rise. When the accumulated water overflows the lowest layer of each group of tee pipe assemblies, the light shielding plate just blocks the lowest layer of infrared travel switches, and the controller controls the corresponding external standby water pump to start. The accumulated water is pumped into the C-shaped pipe through the connecting pipe, and the accumulated water pushes the valve plate to insert into the valve seat along the valve plate groove, preventing the accumulated water from reversely impacting the slope through the first drain pipe and causing damage to the internal structure of the slope. The accumulated water is pumped away through the first water delivery pipe, improving the automatic drainage efficiency inside the foundation pit.

[0019] SS05 As the water level of the accumulated water inside the foundation pit gradually rises, it causes the float and the light shielding plate to gradually rise. The light shielding plate blocks the corresponding infrared travel switches one by one, sequentially controlling the corresponding external standby water pumps to work, further improving the automatic drainage efficiency inside the foundation pit.

[0020] The present invention has the following beneficial effects:

[0021] 1. The present invention evenly pours second concrete columns on the inner bottom surface of the foundation pit at the circumferential side of the water collection well, places the placement bucket on the filter element into the water collection well, so that the positioning plate is inserted into the corresponding second concrete column, and then inserts the counterweight block into the corresponding second concrete column to press the positioning plate. The second water delivery pipe is connected to the external working water pump through the water suction pipe. The float level gauge in the water collection well controls the start of the external working water pump, and the water inside the placement bucket is automatically pumped away through the water suction pipe, realizing the automatic drainage function of the water collection well.

[0022] 2. The present invention symmetrically pours a number of first concrete columns on the inner bottom surface of the foundation pit on both sides of the water collection well, inserts two groups of fixing plates into the corresponding first concrete columns respectively, and sprays a soil nail wall on the slope. At this time, the two groups of first side plates are closely attached to the soil nail wall on the slope; by closely attaching the two groups of second side plates to the corresponding soil nail wall on the slope and inserting them along the insertion groove, the assembly of the support frame is completed, realizing the support of the inner wall slope of the foundation pit and preventing the slope from collapsing.

[0023] 3. The present invention inserts each group of second drain pipes into the soil nail wall on the slope along the corresponding insertion holes on the second side plate; inserts the first drain pipes on each group of tee pipe assemblies into the soil nail wall on the slope along the corresponding insertion holes on the first side plate; the accumulated water inside the slope is drained into the drainage ditch and then into the water collection cavity in the water collection well through each group of first drain pipes and second drain pipes. The water in the water collection cavity is filtered through the filter holes on the placement bucket and enters the interior of the placement bucket, so that the accumulated water entering the water collection well is filtered, protecting the external working water pump.

[0024] 4. When there is too much accumulated water inside the slope in the present invention, and the water flow drained into the foundation pit through each first drain pipe and second drain pipe is too large, resulting in the water inflow into the foundation pit being greater than the drainage volume of the water collection well, causing the accumulated water to overflow the water collection well. As the liquid level of the accumulated water gradually rises, it drives the floating ball to gradually rise along the guide rod, thereby driving the light shielding plate to gradually rise. When the accumulated water overflows the lowest-layer groups of tee pipe assemblies, the light shielding plate just blocks the infrared travel switch of the lowest layer. The controller controls the start of the corresponding external standby water pump, and pumps the accumulated water into the C-shaped pipe through the connecting pipe. The accumulated water pushes the valve plate to insert into the valve seat along the valve plate groove, preventing the accumulated water from reversely impacting the slope through the first drain pipe and causing damage to the internal structure of the slope. The accumulated water is pumped away through the first water delivery pipe, improving the automatic drainage efficiency inside the foundation pit.

[0025] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the foundation pit drainage structure of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the foundation pit of the present invention;

[0029] Figure 3 It is a schematic structural diagram of the support frame of the present invention;

[0030] Figure 4 It is a schematic structural diagram of the first side plate of the present invention;

[0031] Figure 5 It is a schematic structural diagram of the second side plate of the present invention;

[0032] Figure 6 It is a schematic structural diagram of the filter element of the present invention;

[0033] Figure 7 This is a schematic structural diagram of the counterweight of the present invention;

[0034] Figure 8 This is a schematic structural diagram of the two-way pipe assembly of the present invention;

[0035] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0036] 1 - Foundation pit, 2 - Drainage ditch, 3 - Sump, 4 - Slope, 5 - Support frame, 6 - First side plate, 7 - Second side plate, 8 - Insertion hole, 9 - Two-way pipe assembly, 10 - Second drain pipe, 11 - Filter element, 12 - Baffle, 13 - Insertion slot, 14 - Diagonal support plate, 15 - Fixed plate, 16 - Positioning hole, 17 - First concrete column, 18 - Guide rod, 19 - Floating ball, 20 - T-shaped floating plate, 21 - Light-shielding plate, 22 - Support plate, 23 - Support board, 24 - Infrared travel switch, 25 - Controller, 26 - Placing bucket, 27 - Filter hole, 28 - Support rod, 29 - Second water delivery pipe, 30 - Sealing cover, 31 - Positioning plate, 32 - Second concrete column, 33 - Counterweight, 34 - First drain pipe, 35 - Valve seat, 36 - Connecting pipe, 37 - C-shaped pipe, 38 - First water delivery pipe, 39 - Sliding sleeve, 40 - Piston rod, 41 - Valve plate. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0038] Please refer to Figure 1-8 As shown, the present invention is a foundation pit drainage structure, including a foundation pit 1, a drainage ditch 2 opened on the inner bottom surface of the foundation pit 1, a sump 3, and a support frame 5 inserted on the inner bottom surface of the foundation pit 1.

[0039] Slopes 4 are provided on the inner walls of the foundation pit 1; the sump 3 is communicated with the drainage ditch 2; the support frame 5 includes: two relatively arranged first side plates 6 and two relatively arranged second side plates 7; the two first side plates 6 are arranged on the sides of two relatively opposite slopes 4; the two second side plates 7 are arranged on the sides of the other two relatively opposite slopes 4; insertion holes 8 are uniformly opened downward at a certain inclination angle on the sides of the first side plate 6 and the second side plate 7; the insertion holes 8 on the first side plate 6 are in insertion fit with a two-way pipe assembly 9; the insertion holes 8 on the second side plate 7 are in insertion fit with a second drain pipe 10; a filter element 11 is arranged inside the sump 3; the filter element 11 is connected to an external working water pump through a water suction pipe; the two-way pipe assemblies 9 at the same height are all connected to an external standby water pump through a water suction pipe.

[0040] By inserting two groups of fixed plates 15 into the corresponding first concrete columns 17, a soil nailing wall is sprayed on the slope 4. At this time, the two groups of first side plates 6 are closely attached to the soil nailing wall on the slope 4; by closely attaching the two groups of second side plates 7 to the soil nailing wall on the corresponding slope 4 and inserting them along the insertion slots 13, the assembly of the support frame 5 is completed, realizing the support for the inner slope 4 of the foundation pit 1 and preventing the slope 4 from collapsing; the accumulated water inside the slope 4 is drained into the drainage ditch 2 through the first drain pipes 34 and the second drain pipes 10 in each group and then flows into the water collecting cavity in the water collecting well 3. The water in the water collecting cavity is filtered through the filter holes 27 on the placement bucket 26 and enters the interior of the placement bucket 26, so that the accumulated water entering the water collecting well 3 is filtered, protecting the external working water pump; as the liquid level of the accumulated water gradually rises, it drives the floating ball 19 to gradually rise along the guide rod 18, thereby driving the light shielding plate 21 to gradually rise. When the accumulated water overflows the two-way pipe assemblies 9 in the lowest layer, the light shielding plate 21 just blocks the infrared travel switch 24 in the lowest layer, and the controller 25 controls the corresponding external standby water pump to start; the accumulated water is pumped away through the first water delivery pipe 38.

[0041] Among them, baffles 12 are symmetrically and fixedly connected to the side surfaces of the first side plates 6; an insertion slot 13 is formed between the baffles 12 and the first side plates 6; the second side plates 7 are inserted into the insertion slots 13 on the two first side plates 6; the side surfaces of the first side plates 6 are symmetrically and fixedly connected with inclined support plates 14 at a certain inclination angle; a fixed plate 15 is fixedly connected between the bottom surfaces of the two inclined support plates 14; positioning holes 16 are provided on the surfaces of the fixed plates 15; first concrete columns 17 are symmetrically cast on both sides of the water collecting well 3 at the bottom surface of the foundation pit 1; the first concrete columns 17 are in plug-in fit with the positioning holes 16.

[0042] By inserting the fixed plate 15 into the corresponding first concrete column 17 and inserting the second side plate 7 into the insertion slots 13 on the two first side plates 6, the assembly of the support frame 5 is completed. The fixed plate 15 is fixedly connected to the first side plate 6 through the inclined support plate 14, realizing the support for the slope 4.

[0043] Among them, guide rods 18 are symmetrically and fixedly connected to the surfaces of the fixed plates 15; floating balls 19 are slidably fitted on both guide rods 18; a T-shaped floating plate 20 is fixedly connected between the two floating balls 19; a light shielding plate 21 is fixedly connected to the end of the T-shaped floating plate 20; a support plate 22 is fixedly connected to the surface of the first side plate 6; a support board 23 is fixedly connected to the surface of the support plate 22; infrared travel switches 24 are provided on the support board 23 from top to bottom; the distance between adjacent infrared travel switches 24 is the same as the distance between adjacent insertion holes 8 in the vertical direction.

[0044] By making the distance between adjacent infrared travel switches 24 consistent with the distance between adjacent insertion holes 8 in the vertical direction, when the accumulated water in the foundation pit 1 floods each group of two-way pipe assemblies 9 at the same height, the infrared travel switches 24 at the corresponding height are blocked, thereby controlling the start of the corresponding external standby water pumps.

[0045] Among them, a controller 25 is arranged on the side surface of the support plate 23; the output end of the infrared travel switch 24 is electrically connected to the controller 25; a float level gauge is arranged inside the catch basin 3; the output end of the float level gauge is electrically connected to the controller 25; the output end of the controller 25 is electrically connected to the external working water pump and each external standby water pump respectively.

[0046] The external working water pump is controlled by the float level gauge to automatically pump the accumulated water in the catch basin 3; each corresponding external standby water pump is controlled by each infrared travel switch 24 to automatically pump the accumulated water in the foundation pit 1.

[0047] Among them, the filter element 11 includes: a placement barrel 26 and a sealing cover 30; a plurality of filter holes 27 are formed in the peripheral side surface and the inner bottom surface of the placement barrel 26; a water collection cavity is formed between the placement barrel 26 and the catch basin 3; a support rod 28 is fixedly connected to the bottom of the placement barrel 26; a second water delivery pipe 29 is arranged through the top of the placement barrel 26; the second water delivery pipe 29 is fixedly connected to the external working water pump through a water suction pipe; the sealing cover 30 is inserted into the end of the catch basin 3; a positioning plate 31 is fixedly connected to the peripheral side surface of the sealing cover 30; second concrete columns 32 are uniformly poured on the inner bottom surface of the foundation pit 1 around the catch basin 3; the second concrete columns 32 are inserted and matched with the positioning plate 31; the second concrete columns 32 are inserted and matched with counterweight blocks 33.

[0048] By installing the filter element 11 in the catch basin 3 and pressing it tightly with the counterweight block 33, the filter element 11 is prevented from being washed away by the accumulated water.

[0049] Among them, the two-way pipe assembly 9 includes: a first drain pipe 34, a valve seat 35, a connecting pipe 36 and a C-shaped pipe 37; the first drain pipe 34 is inserted and matched with the insertion hole 8; the valve seat 35 is arranged at the end of the first drain pipe 34; the connecting pipe 36 is arranged at the end of the valve seat 35; both ends of the C-shaped pipe 37 are respectively arranged through the side surfaces of the valve seat 35 and the connecting pipe 36; a first water delivery pipe 38 is arranged through the C-shaped pipe 37; the first water delivery pipe 38 is fixedly connected to the external working water pump through a water suction pipe; a valve plate groove is formed on the side surface of the valve seat 35; a sliding sleeve 39 is fixedly connected to the inner wall of the C-shaped pipe 37; a piston rod 40 is slidably matched inside the sliding sleeve 39; a return spring is fixedly connected between the piston rod 40 and the sliding sleeve 39; a valve plate 41 is fixedly connected to the end of the piston rod 40; the valve plate 41 is slidably matched with the C-shaped pipe 37 and the valve plate groove respectively.

[0050] The accumulated water drawn into the C-shaped pipe 37 pushes the piston rod 40 to stretch the return spring, driving the valve plate 41 to insert into the valve seat 35 through the valve plate groove, realizing the blockage of the first drain pipe 34 and the connecting pipe 36, and the accumulated water in the foundation pit 1 is pumped away through the first water delivery pipe 38.

[0051] The construction method of the foundation pit drainage structure includes the following steps:

[0052] SS01 By evenly pouring the second concrete columns 32 on the circumferential side surfaces of the sump 3 at the inner bottom surface of the foundation pit 1, placing the placement bucket 26 on the filter element 11 into the sump 3, so that the positioning plate 31 is inserted into the corresponding second concrete columns 32, and then inserting the counterweight 33 into the corresponding second concrete columns 32 to press the positioning plate 31 tightly, and connecting the second water delivery pipe 29 with an external working water pump through the water extraction pipe;

[0053] SS02 By symmetrically pouring a number of first concrete columns 17 on both sides of the sump 3 at the inner bottom surface of the foundation pit 1, inserting the two groups of fixing plates 15 into the corresponding first concrete columns 17 respectively, and spraying a soil nail wall on the slope 4. At this time, the two groups of first side plates 6 are closely attached to the soil nail wall on the slope 4; by closely attaching the two groups of second side plates 7 to the soil nail wall on the corresponding slope 4 and inserting them along the insertion groove 13, the assembly of the support frame 5 is completed, realizing the support of the inner wall slope 4 of the foundation pit 1 to prevent the slope 4 from collapsing;

[0054] SS03 Insert each group of second drain pipes 10 into the soil nail wall on the slope 4 along the corresponding insertion holes 8 on the second side plate 7; insert the first drain pipes 34 on each group of tee pipe assemblies 9 into the soil nail wall on the slope 4 along the corresponding insertion holes 8 on the first side plate 6; the accumulated water inside the slope 4 is discharged into the drainage ditch 2 through each group of first drain pipes 34 and second drain pipes 10, and flows into the water collection cavity in the sump 3. The water in the water collection cavity is filtered into the interior of the placement bucket 26 through the filter holes 27 on the placement bucket 26; the start of the external working water pump is controlled by the float level gauge in the sump 3, and the water inside the placement bucket 26 is automatically pumped away through the water extraction pipe;

[0055] When there is too much accumulated water inside the slope 4, and the water flowing into the foundation pit 1 through each first drain pipe 34 and second drain pipe 10 is too large, resulting in the water inflow into the foundation pit 1 being greater than the drainage volume of the sump 3, causing the accumulated water to overflow the sump 3. As the liquid level of the accumulated water gradually rises, it drives the floating ball 19 to gradually rise along the guide rod 18, thereby driving the light-shielding plate 21 to gradually rise. When the accumulated water overflows the lowest-layer two-way pipe assemblies 9, the light-shielding plate 21 just blocks the lowest-layer infrared travel switch 24, and the controller 25 controls the corresponding external standby water pump to start, pumping the accumulated water into the C-shaped pipe 37 through the connecting pipe 36. The accumulated water pushes the valve plate 41 to insert into the valve seat 35 along the valve plate groove, preventing the accumulated water from reversely impacting the slope 4 through the first drain pipe 34 and causing damage to the internal structure of the slope 4. The accumulated water is pumped away through the first water delivery pipe 38, improving the automatic drainage efficiency inside the foundation pit 1;

[0056] As the liquid level of the accumulated water inside the foundation pit 1 gradually rises, it causes the floating ball 19 and the light-shielding plate 21 to gradually rise. The light-shielding plate 21 blocks the corresponding infrared travel switches 24 one by one, successively controlling the operation of each group of corresponding external standby water pumps, further improving the automatic drainage efficiency inside the foundation pit 1.

[0057] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0058] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. The present specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. Foundation pit drainage structure, including a foundation pit (1), a drainage ditch (2) opened on the inner bottom surface of the foundation pit (1), and a sump (3); slopes (4) are provided on the inner walls of the foundation pit (1); the sump (3) is communicated with the drainage ditch (2); It is characterized in that: It also includes: A support frame (5) inserted into the inner bottom surface of the foundation pit (1); the support frame (5) includes: Two relatively arranged first side plates (6), and the two first side plates (6) are arranged on the sides of two relatively arranged groups of slopes (4); Two relatively arranged second side plates (7), and the two second side plates (7) are arranged on the sides of the other two relatively arranged groups of slopes (4); Insertion holes (8) are uniformly opened downward at a certain inclination angle on the sides of the first side plate (6) and the second side plate (7); a two-way pipe assembly (9) is inserted and matched with the insertion holes (8) on the first side plate (6); a second drain pipe (10) is inserted and matched with the insertion holes (8) on the second side plate (7); A filter element (11) is arranged inside the sump (3); the filter element (11) is connected to an external working water pump through a suction pipe; the two-way pipe assemblies (9) at the same height are all connected to an external standby water pump through a suction pipe; The side of the first side plate (6) is symmetrically and fixedly connected with a diagonal support plate (14) at a certain inclination angle; a fixed plate (15) is fixedly connected between the bottom surfaces of the two diagonal support plates (14); Guide rods (18) are symmetrically and fixedly connected to the surface of the fixed plate (15); floating balls (19) are slidably matched on the two guide rods (18); a T-shaped floating plate (20) is fixedly connected between the two floating balls (19); a light-shielding plate (21) is fixedly connected to the end of the T-shaped floating plate (20); a support plate (22) is fixedly connected to the surface of the first side plate (6); an infrared travel switch (24) is provided on the surface of the support plate (22) from top to bottom; the distance between adjacent infrared travel switches (24) is the same as the distance between adjacent insertion holes (8) in the vertical direction; A controller (25) is arranged on the side of the support plate (23); the output end of the infrared travel switch (24) is electrically connected to the controller (25); a float level gauge is arranged inside the sump (3); the output end of the float level gauge is electrically connected to the controller (25); the output end of the controller (25) is electrically connected to the external working water pump and each external standby water pump respectively; The two-way pipe assembly (9) includes: A first drain pipe (34), and the first drain pipe (34) is inserted and matched with the insertion hole (8); A valve seat (35), and the valve seat (35) is arranged at the end of the first drain pipe (34); A connecting pipe (36), and the connecting pipe (36) is arranged at the end of the valve seat (35); A C-shaped pipe (37), and both ends of the C-shaped pipe (37) are respectively penetrated and arranged on the sides of the valve seat (35) and the connecting pipe (36); a first water delivery pipe (38) is penetrated through the C-shaped pipe (37); the first water delivery pipe (38) is fixedly connected to the external working water pump through a suction pipe; The side of the valve seat (35) is provided with a valve plate groove; a sliding sleeve (39) is fixedly connected to the inner wall of the C-shaped pipe (37); a piston rod (40) is slidably fitted inside the sliding sleeve (39); a return spring is fixedly connected between the piston rod (40) and the sliding sleeve (39); a valve plate (41) is fixedly connected to the end of the piston rod (40); the valve plate (41) is slidably fitted with the C-shaped pipe (37) and the valve plate groove respectively.

2. The foundation pit drainage structure according to claim 1, wherein, The side of the first side plate (6) is symmetrically and fixedly connected with baffles (12); a plug-in groove (13) is formed between the baffles (12) and the first side plate (6); the second side plate (7) is plugged into the plug-in grooves (13) on the two first side plates (6).

3. The foundation pit drainage structure according to claim 1, characterized in that, Positioning holes (16) are provided on the surface of the fixing plate (15); first concrete columns (17) are symmetrically poured on both sides of the bottom surface of the foundation pit (1) where the sump (3) is located; the first concrete columns (17) are plugged and matched with the positioning holes (16).

4. The foundation pit drainage structure according to claim 1, wherein, The filter element (11) includes: A placement bucket (26), and a plurality of filter holes (27) are provided on the circumferential side surface and the inner bottom surface of the placement bucket (26); a water collection cavity is formed between the placement bucket (26) and the sump (3); a support rod (28) is fixedly connected to the bottom of the placement bucket (26); a second water delivery pipe (29) is provided through the top of the placement bucket (26); the second water delivery pipe (29) is fixedly connected to an external working water pump through a water suction pipe; A sealing cover (30), and the sealing cover (30) is plugged into the end of the sump (3); a positioning plate (31) is fixedly connected to the circumferential side surface of the sealing cover (30); second concrete columns (32) are evenly poured on the inner bottom surface of the foundation pit (1) on the circumferential side of the sump (3); the second concrete columns (32) are plugged and matched with the positioning plate (31); the second concrete columns (32) are plugged and matched with a counterweight block (33).

5. The construction method of the foundation pit drainage structure according to any one of claims 1-4, characterized in that, It includes the following steps: SS01 By evenly pouring second concrete columns (32) on the inner bottom surface of the foundation pit (1) on the circumferential side of the sump (3), placing the placement bucket (26) on the filter element (11) into the sump (3) so that the positioning plate (31) is inserted into the corresponding second concrete column (32), then plugging the counterweight block (33) into the corresponding second concrete column (32) to press the positioning plate (31), and connecting the second water delivery pipe (29) to an external working water pump through a water suction pipe; SS02 By symmetrically pouring a plurality of first concrete columns (17) on both sides of the inner bottom surface of the foundation pit (1) where the sump (3) is located, respectively plugging two groups of fixing plates (15) into the corresponding first concrete columns (17), and spraying a soil nail wall on the slope (4). At this time, the two first side plates (6) are closely attached to the soil nail wall on the slope (4); by closely attaching the two second side plates (7) to the soil nail wall on the corresponding slope (4) and inserting them along the plug-in groove (13), the assembly of the support frame (5) is completed, realizing the support for the slope (4) of the inner wall of the foundation pit (1) and preventing the slope (4) from collapsing. SS03 inserts each group of second drain pipes (10) into the soil nail wall on the slope (4) along the corresponding insertion holes (8) on the second side plate (7); inserts the first drain pipes (34) on each group of tee pipe assemblies (9) into the soil nail wall on the slope (4) along the corresponding insertion holes (8) on the first side plate (6); the accumulated water inside the slope (4) is drained into the drainage ditch (2) through each group of first drain pipes (34) and second drain pipes (10), and flows into the water collection cavity in the water collection well (3); the water in the water collection cavity is filtered through the filter holes (27) on the placement bucket (26) and enters the inside of the placement bucket (26); the external working water pump is controlled to start by the float level gauge in the water collection well (3), and the water inside the placement bucket (26) is automatically pumped away through the water extraction pipe; SS04 When the accumulated water inside the slope (4) is excessive and the water flowing into the foundation pit (1) through each first drain pipe (34) and second drain pipe (10) is too large, resulting in the water inflow of the foundation pit (1) being greater than the drainage volume of the water collection well (3), causing the accumulated water to overflow the water collection well (3). As the water level of the accumulated water gradually rises, it drives the float (19) to gradually rise along the guide rod (18), thereby driving the light shielding plate (21) to gradually rise. When the accumulated water overflows the lowest-layer groups of tee pipe assemblies (9), the light shielding plate (21) just blocks the lowest-layer infrared travel switch (24), and the controller (25) controls the corresponding external standby water pump to start. The accumulated water is pumped into the C-shaped pipe (37) through the connecting pipe (36). The accumulated water pushes the valve plate (41) to insert into the valve seat (35) along the valve plate groove, preventing the accumulated water from reversely impacting the slope (4) through the first drain pipe (34) and causing damage to the internal structure of the slope (4). The accumulated water is pumped away through the first water delivery pipe (38), improving the automatic drainage efficiency inside the foundation pit (1); SS05 As the water level of the accumulated water inside the foundation pit (1) gradually rises, it causes the float (19) together with the light shielding plate (21) to gradually rise. The light shielding plate (21) blocks the corresponding infrared travel switches (24) one by one, successively controlling the corresponding external standby water pumps to work, further improving the automatic drainage efficiency inside the foundation pit (1).

Images