CN108612108B - Plugging device for deep foundation pit - Google Patents

Abstract

The invention discloses a plugging device for a deep foundation pit, which is characterized by comprising the following components: the air bag pipe is a double-layer pipe, a hollow cavity is formed between the inner wall and the outer wall, the other end part of the air bag pipe is connected with an annular filter plate and a filter elastic sheet, an air bag is arranged on the outer wall of the air bag pipe, and a plurality of second holes are formed in the inner wall of the air bag pipe; the baffle is tightly adhered to the filter plate and is inserted into the hollow cavity of the air bag pipe in a sealing way, a plurality of third holes are formed in the limiting pipe along the circumferential direction of the limiting pipe, a rotating plate is further arranged in the limiting pipe, and the radius of the rotating plate is larger than the interval between the filter elastic piece and the rotating shaft; the grouting pipe is provided with a clamping structure in a sleeved mode, which is close to the outer wall circumference of one end portion, and the grouting pipe can be just clamped in a plurality of corresponding second holes and third holes. The invention fully utilizes the water to seal the outer wall of the pipe and the pipe channel, and can realize timely grouting and plugging.

Description

Plugging device for deep foundation pit

Technical Field

The invention relates to the technical field of construction of deep foundation pits of constructional engineering. More particularly, the present invention relates to a deep foundation pit plugging device.

Background

The foundation pit support structure is an underground hidden project, and the foundation pit leakage can greatly affect the foundation pit construction and the surrounding environment, so that the leakage blocking treatment is required to be carried out on the leakage position in time after the foundation pit is excavated. At present, a leakage stopping material is generally adopted for stopping leakage of a leakage part directly or a method of hole guiding and grouting from the ground is adopted for stopping leakage of a foundation pit, and in the practical operation process of the hole guiding and grouting method, because how high the practical leakage part is from the ground is not known, if the leakage situation occurs in a deep foundation pit, the hole guiding time is long at this time, the pipe stopping phenomenon can occur to the leakage stopping material during grouting, and the leakage stopping cannot be successfully realized. The leakage stopping material is used for stopping the leakage of the leakage part directly, firstly, a leakage hole for water leakage is needed to be found, then a grouting pipe is inserted for stopping the leakage, if the water flow is large, the water burst can be flushed out of the leakage stopping material, so that the water burst is needed to be discharged out of a part of the leakage stopping material, in addition, a filtering material or a filter screen for filtering is needed to be installed in the outward water burst process, otherwise, sand can burst out along with the water burst, and the foundation pit is damaged.

Disclosure of Invention

The invention aims to provide a plugging device for a deep foundation pit, which fully utilizes the water to seal the outer wall of a pipe and a pipe channel and can realize timely grouting plugging.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a deep foundation pit plugging device comprising: the air bag tube is a double-layer tube, a hollow cavity is formed between the inner wall and the outer wall, one end part between the inner wall and the outer wall of the air bag tube is sealed, the other end part is connected with an annular filter plate, the filter plate is divided into equal even parts along the circumferential direction of the filter plate, the filter plate and the sealed second plate are mutually staggered and integrally formed, an annular plate is fixed on the surface of the filter plate, which is close to the central axis side of the air bag tube, through a cylindrical plate, the inner diameter of the annular plate is equal to the inner diameter of the filter plate, the annular plate is parallel to the filter plate, a filtering elastic sheet is just clamped between the filter plate and the annular plate, the annular plate is circular, a plurality of filter holes are formed in the filtering elastic sheet, a plurality of first holes are formed in the outer wall of the air bag tube at intervals along the circumferential direction and the length direction of the air bag tube, and a plurality of second holes are formed in the circumferential direction of the inner wall of the air bag tube at equal intervals; the outer diameter of the baffle is identical to the inner diameter of the outer wall of the air bag pipe, the inner diameter of the baffle is slightly smaller than the inner diameter of the inner wall of the air bag pipe, the baffle is tightly adhered to the filter plate and is inserted into the hollow cavity of the air bag pipe in a sealing way, a plurality of third holes which are in one-to-one correspondence with the second holes and have the same diameter are formed in the periphery of the limiting pipe in a circle, a rotating shaft perpendicular to the inner wall is fixed on the inner wall of the limiting pipe between the baffle and the third holes, the rotating shaft penetrates through the central axis of the limiting pipe, a circular rotating plate which has the same inner diameter as the limiting pipe is sleeved on the rotating shaft, the rotating plate can rotate in the limiting pipe by taking the rotating shaft as an axis, and the radius of the rotating plate is larger than the interval between the filtering elastic piece and the rotating shaft; the grouting pipe is provided with a clamping structure in a sleeved mode, which is close to the outer wall circumference of one end portion, and the grouting pipe can be just clamped in a plurality of corresponding second holes and third holes.

Preferably, a plurality of grooves are concavely formed in the circumferential direction of the outer wall of the grouting pipe in a circle, first springs are arranged in the grooves, the depth of the first springs is equal to that of the grooves in a free state, the clamping structure comprises a sleeve and a plurality of clamping columns, the sleeve is just sleeved on the outer wall of the grouting pipe, one end of the sleeve is flush with one end of the grouting pipe, a plurality of through holes penetrating through the sleeve are formed in the sleeve in the circumferential direction of the sleeve in a circle, and a pair of concave holes are concavely formed in the sleeve in the radial direction of the through holes in the opposite directions of the through holes; the clamping columns are matched with the second holes and the third holes in a corresponding mode, the clamping columns are matched with the grooves in a one-to-one mode, a pair of opposite concave channels are formed in the outer walls of the clamping columns in an inward concave mode, second springs are arranged in the concave channels, the second springs are connected with the baffle columns, and the baffle columns are matched with the concave holes and are longer than the concave holes.

Preferably, the clamping structure further comprises a plurality of arc-shaped sector plates, one ends of arc-shaped edges of the arc-shaped sector plates, which are opposite to the tip ends of the arc-shaped sector plates, are hinged to the end parts of the sleeve parallel to the grouting pipe, the arc-shaped edges of the arc-shaped sector plates, which are opposite to the tip ends of the arc-shaped sector plates, form a circle with the same diameter as the sleeve, and the arc-shaped sector plates form a complete sealed conical sealing plate.

Preferably, the inner wall of the limiting pipe is provided with a semicircular limiting plate with a vertical wall surface, and the semicircular limiting plate is close to the rotating shaft and located between the baffle and the rotating shaft.

Preferably, the outer wall of the end part of the air bag pipe, which is outwards, is provided with a plurality of extension lines corresponding to the scale marks passing through the central axes of the second holes, the outer wall of the end part of the limiting pipe, which is outwards, is also provided with a plurality of extension lines corresponding to the scale marks passing through the central axes of the third holes, the number of the second holes and the third holes is equal to the number of the filter plates which are equally divided, and the central axes of the first plates and the second plates on the filter plates are in one-to-one correspondence and parallel to the scale marks.

Preferably, the device further comprises an auxiliary plate and an observation tube, wherein the auxiliary plate is just matched in the limiting tube, a through hole penetrating through the upper bottom surface and the lower bottom surface of the auxiliary plate is further formed in the auxiliary plate, one end of the observation tube is communicated with the through hole in a sealing mode, and the other end of the observation tube penetrates out of the limiting tube and vertically upwards.

Preferably, the grouting pipe inner wall slides and is provided with the stull of perpendicular to wall, is fixed with a pair of card strip on the stull, and card strip one end protrusion is outside the grouting pipe, the rotor plate is provided with a pair of cooperation pole on its a pair of surface that is relative, and it is L type and one end are fixed in the rotor plate and are located the surface of limiting plate one side, the other end be on a parallel with rotor plate surface and with the lateral wall parallel and level of rotor plate, the tip of the other end of cooperation pole inwards is sunken to be formed with the card hole, and when the rotor plate rotated to its axis perpendicular to limiting pipe axis, a pair of convex tip of cooperation pole block in the card hole of a pair of cooperation pole just.

The invention at least comprises the following beneficial effects:

1. according to the invention, through the arrangement of the air bag pipe and the limiting pipe, the sealing between the outer wall of the pipe and the pipe channel can be realized by fully utilizing the water flowing out through the air bag.

2. The invention also utilizes the filter plate and the filter elastic sheet to realize the filtration of water burst, and can prevent sand and the like from being burst out together with water.

3. The clamping structure and the sector plate hinged to the clamping structure can realize multiple functions, so that the clamping of the second hole and the third hole can be realized, and the sealing, reopening and penetrating of the pipe orifice of the grouting pipe can be realized.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic view of the structure of an air bag tube and a spacing tube of the present invention;

FIG. 2 is a schematic view of a filter plate according to the present invention;

FIG. 3 is a cross-sectional view of the plane A-A of FIG. 1 in accordance with the present invention;

FIG. 4 is a schematic structural view of the grouting pipe and the clamping structure of the invention;

FIG. 5 is a schematic view of the structure of a sector plate of the present invention;

fig. 6 is a schematic structural view of the rotating plate and the clamping strip of the present invention.

Reference numerals illustrate:

1. the device comprises an air bag pipe, 101, a filtering elastic sheet, 102, an annular plate, 103, a filter plate, 104, an air bag, 105, a second hole, 106, a first plate, 107, a second plate, 2, a limiting pipe, 201, a baffle, 202, a third hole, 203, a rotating shaft, 204, a rotating plate, 205, a limiting plate, 206, a matching rod, 3, a grouting pipe, 301, a groove, 302, a first spring, 303, a cross brace, 304, a clamping strip, 4, a clamping structure, 401, a sleeve, 402, a clamping column, 403, a baffle column, 404, a sector plate, 5, an auxiliary plate, 6 and an observation pipe.

Detailed Description

The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.

It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention.

As shown in fig. 1 to 6, the present invention provides a deep foundation pit plugging device, comprising: the air bag tube 1 is a double-layer tube, a hollow cavity is formed between the inner wall and the outer wall, one end part between the inner wall and the outer wall of the air bag tube 1 is sealed, the other end part is connected with an annular filter plate 103, the filter plate 103 is divided into equal even parts along the circumferential direction of the filter plate 103, the filter plate 103 and the sealed second plate 107 are mutually staggered and integrally formed, an annular plate 102 is fixed on the surface of the filter plate 103, which is close to the central axis side of the air bag tube 1, the inner diameter of the annular plate is equal to the inner diameter of the filter plate 103, the annular plate 102 is parallel to the filter plate 103 and is just clamped with the filter plate 103, a filter elastic sheet 101 is circular, a plurality of filter holes are formed in the filter elastic sheet 101, a plurality of first holes are formed in the outer wall of the air bag tube 1 at intervals along the circumferential direction and the length direction of the filter plate, a plurality of second holes 105 are formed in the circumferential direction of the inner wall of the air bag tube 1 at equal intervals; the outer diameter of the baffle 201 is identical to the inner diameter of the outer wall of the air bag tube 1, the inner diameter of the baffle 201 is slightly smaller than the inner diameter of the inner wall of the air bag tube 1, the baffle 201 is tightly adhered to the filter plate 103 and is inserted into the hollow cavity of the air bag tube 1 in a sealing way, a plurality of third holes 202 which are in one-to-one correspondence with the second holes 105 and have the same diameter are formed in the periphery of the baffle 2, a rotating shaft 203 which is perpendicular to the inner wall is fixed on the inner wall of the baffle 2 between the baffle 201 and the third holes 202, the rotating shaft 203 penetrates through the central axis of the limiting tube 2, a circular rotating plate 204 which is identical to the inner diameter of the limiting tube 2 is sleeved on the rotating shaft 203, the rotating plate 203 can rotate in the limiting tube 2 by taking the rotating shaft 203 as an axis, and the radius of the rotating plate 204 is larger than the interval between the filtering elastic piece 101 and the rotating shaft 203; the grouting pipe 3 is provided with a clamping structure 4 sleeved on the outer wall circumference close to one end part, and the clamping structure can be just clamped in a plurality of corresponding second holes 105 and third holes 202.

In the above technical solution, the air bag 104 on the outer wall of the air bag tube 1 refers to an inflatable elastomer made of air bag general materials, and after water with a certain pressure is introduced into the air bag tube 1, the air bag 104 can be inflated, so that the air bag tube 1 can be clamped in the plugging channel in a sealing way, water or sand at the water burst hole is prevented from leaking out of the outer wall of the air bag tube 1, on the other hand, the water burst is also waste water after being extracted, in the existing method, the space between the tube wall and the tube channel is sealed by the air bag, and the air bag 104 is inflated by introducing water from the outside or ventilating or introducing other materials which can cause the air bag 104 to inflate, so that the cost is high. The filtering holes on the first plate 106 and the filtering holes on the filtering elastic sheet 101 can filter sand and the like, so that the water burst does not contain sand and the like, the filtering elastic sheet 101 has certain elastic flexibility, the filtering elastic sheet is clamped with the cylindrical plate through the annular plate 102, the cylindrical plate is perpendicular to the outer side of the filtering plate 103, and the outer ring of the annular plate 102 is fixed at the outer end of the cylindrical plate, so that a space for accommodating the filtering elastic sheet 101 is formed between the annular plate 102 and the filtering plate 103. The baffle 201 and the structure of the filter plate 103 that the end of the limiting tube 2 set up are identical, also by the crisscross board that has the filtration pore and the sealed board integrated into one piece each other, and the number of the boards that constitute baffle 201 is the same with the first board 106 and the second board 107 that constitute the filter plate 103, when carrying out the filter plate 103 and straining water, can be with the board that has the filtration pore on the baffle 201 with first board 106 corresponding, and need not strain water, when need carrying out the seal with the tip of gasbag pipe 1, rotatable limiting tube 2 for the board that has the filtration pore on the baffle 201 and the just one-to-one of second board 107. The specific operation steps for plugging by using the plugging device of the technical scheme are as follows:

if the water burst is serious, firstly, introducing a water filtering material into a water burst hole, then inserting a drain pipe to discharge a part of water burst, taking out the drain pipe, and inserting one end of the air bag pipe 1 and the limiting pipe 2 of the plugging device of the invention into the water burst hole along the position where the drain pipe is inserted, wherein the other end of the air bag pipe is protruded and positioned in a foundation pit. The filtering plate 103 and the filtering elastic sheet 101 are used for filtering water, the filtered water enters the hollow cavity of the air bag pipe 1 and the limiting pipe 2, at the moment, the rotating plate 204 in the limiting pipe 2 rotates to be slightly inclined and does not contact the filtering elastic sheet 101 so that the water can flow into the limiting pipe 2, when the water flows out of the limiting pipe 2, the grouting pipe 3 and the clamping structure 4 on the grouting pipe 3 are inserted into a small part, the inner wall surface of the limiting pipe 2 can be completely sealed when the water flows out, then a sealing plate is arranged on the inner wall of the grouting pipe 3 and is preferably positioned at the end part of the grouting pipe 3, which is close to the inner side, after a certain period of time, when the water completely fills the cavity of the limiting pipe 2 and the air bag pipe 1, the limiting pipe 2 is rotated, the baffle 201 can block the sealing filter plate 103, at the moment, the second holes 105 and the third holes 202 are in one-to-one correspondence and are relatively coincident with the central axes of the second holes 105 and the third holes 202, and the third holes 202 are preferably arranged close to the rotating plate 204. The rotating plate 204 is rotated to enable the outer wall of the rotating plate to be tightly attached to the outer wall of the limiting pipe 2 to seal, so that water can not enter the limiting pipe 2 any more, the grouting pipe 3 is pushed inwards, the water is pressed into the hollow cavity of the air bag pipe 1 from the second holes 105 and the third holes 202, and along with the further inwards pushing of the grouting pipe 3, the water continuously enters the hollow cavity of the air bag pipe 1, and therefore the air bags 104 expand outwards to prop against a leaking stoppage channel, and the sealing and plugging channel is achieved. Until the clamping structure 4 on the grouting pipe 3 is clamped into the second hole 105 and the third hole 202 to completely seal the hollow cavity of the air bag pipe 1, at the moment, the sealing plate in the grouting pipe 3 is removed and then the rotating plate 204 is rotated, if excessive water gushes exist, water pumping is continued, if not, the rotating plate 204 is rotated until the inner part of the limiting pipe 2 is just divided into two parts which are completely communicated, and as the radius of the rotating plate 204 is larger than the interval between the filtering elastic piece 101 and the rotating shaft 203, the filtering elastic piece 101 can be separated from the space between the annular plate 102 and the filter plate 103 in the rotating process of the rotating plate 204, so that the grouting is smoothly carried out through the grouting pipe 3, and the blocking is realized.

In another technical scheme, a plurality of grooves 301 are concavely arranged inwards in a circle along the circumferential direction of the outer wall of the grouting pipe 3, first springs 302 are arranged in the grooves 301, the depth of each first spring 302 is equal to that of each groove 301 in a free state, the clamping structure 4 comprises a sleeve 401, a plurality of clamping columns 402 and a plurality of circular arc-shaped sector plates 404, the sleeve 401 is just sleeved on the outer wall of the grouting pipe 3, one end of the sleeve is flush with one end of the grouting pipe 3, a plurality of through holes penetrating through the sleeve 401 are formed in the sleeve 401 along the circle along the circumferential direction of the sleeve, and a pair of concave holes are concavely formed in the through holes along the radial direction of the sleeve 401 opposite to the sleeve 401; the plurality of clamping columns 402 are just matched with the plurality of second holes 105 and the plurality of third holes 202 correspondingly, the plurality of clamping columns 402 are also matched with the plurality of grooves 301 correspondingly one by one, a pair of opposite concave channels are concavely arranged on the outer wall of the clamping column 402 inwards, second springs are arranged in the concave channels, the second springs are connected with the baffle columns 403, the baffle columns 403 are matched with the concave holes, and the length of the baffle columns 403 is larger than the depth of the concave holes; one end of the arc-shaped edges of the arc-shaped sector plates 404 opposite to the tip ends of the arc-shaped sector plates are hinged to the end of the sleeve 401 flush with the grouting pipe 3, the arc-shaped edges of the arc-shaped sector plates 404 opposite to the tip ends of the arc-shaped sector plates just form a circle with the same diameter as the sleeve 401, and the arc-shaped sector plates 404 just form a complete sealed conical-like sealing plate.

In the above technical solution, the specific fastening process of the fastening structure 4 is: firstly, when the grouting pipe 3 is inserted into the limit pipe 2, the plurality of clamping columns 402 compress the first springs 302 to be clamped in the plurality of grooves 301 in a one-to-one correspondence manner, the pair of baffle columns 403 on the clamping columns 402 compress the second springs to be positioned in the pair of concave channels, the plurality of circular arc-shaped sector plates 404 are perpendicular to the sleeve 401 to just form a conical sealing plate to stop the opening of the grouting pipe 3, so that pressurized water enters the cavity of the air sac pipe 1 to continuously move the grouting pipe 3 inwards, when the plurality of clamping columns 402 move to the positions corresponding to the plurality of second holes 105 and the third holes 202 in a one-to-one correspondence manner, the clamping columns 402 are separated from the grooves 301 to be clamped into the second holes 105 and the third holes 202 under the elastic action of the first springs, and simultaneously, when the pair of baffle columns 403 on the clamping columns 402 move outwards to the positions of concave holes, the clamping columns 402 are clamped into the concave holes under the elastic action of the second springs, the clamping columns 402 are clamped into the concave holes under the sealing plate, the circular arc-shaped sector plates 402 are clamped into the sealing plate, and the sealing plate 3 are tightly contacted with the sealing plate 3 when the circular arc-shaped sector plates 401 move to the sealing plate 3, and the sealing plate 404 is tightly contacted with the sealing plate 3 when the sealing plate 3 is tightly contacted with the sealing plate 3. The clamping structure 4 realizes the clamping of the second hole 105 and the third hole 202, and also realizes the sealing, reopening and penetrating of the pipe orifice of the grouting pipe 3.

In another embodiment, the inner wall of the limiting tube 2 is provided with a semicircular limiting plate 205 with a vertical wall surface, which is close to the rotating shaft 203 and is located between the baffle 201 and the rotating shaft 203. When the rotating plate 204 rotates to cling to the inner wall of the limiting pipe 2, the lower bottom surface of the rotating plate clings to the limiting plate 205, so that the rotating plate 204 can be prevented from rotating continuously, and the limiting plate 205 has a semi-annular arc structure.

In another technical scheme, the outer wall of the outward end of the air bag tube 1 is provided with a plurality of scale marks of extending lines passing through the central axes of the second holes 105 correspondingly, the outer wall of the outward end of the limiting tube 2 is also provided with a plurality of scale marks of extending lines passing through the central axes of the third holes 202, the number of the second holes 105 and the third holes 202 is equal to the number of the filter plates 103 which are equally divided, and the central axes of the first plates 106 and the second plates 107 on the filter plates 103 are in one-to-one correspondence with the plurality of scale marks and are parallel. Through the setting of scale mark, can make the spacing pipe 2 better location when rotating to make second hole 105 and third hole 202 correspond, in addition the number of second hole 105 and third hole 202 equals with the number of parts that filter 103 was equally divided into, can make the third hole 202 on the spacing pipe 2 correspond with second hole 105 just at the beginning, later when needs rotate spacing pipe 2 in order to seal filter 103, still correspond the scale mark on the gasbag pipe 1 with the scale mark on the spacing pipe 2, can realize the correspondence of second hole 105 and third hole 202. Fig. 2 and 3 are corresponding diagrams when the first plate 106 and the second plate 107 are three, respectively, and fig. 4 and 5 are structural diagrams when the circular arc-shaped sector plate 404 is four.

In another technical scheme, the device further comprises an auxiliary plate 5 and an observation tube 6, wherein the auxiliary plate 5 is just matched in the limiting tube 2, a through hole penetrating through the upper bottom surface and the lower bottom surface of the auxiliary plate 5 is further formed in the auxiliary plate 5, one end of the observation tube 6 is communicated with the through hole in a sealing mode, and the other end of the observation tube penetrates out of the limiting tube 2 and vertically upwards. The auxiliary plate 5 is arranged so that before the grouting pipe 3 is inserted, the water level in the limiting pipe 2 and the air bag pipe 1 can be observed, the vertical end opening of the observing pipe 6 is higher than the upper end of the air bag pipe 1, and the water level can be judged through the water level of the vertical pipe of the observing pipe 6.

In another technical solution, the inner wall of the grouting pipe 3 is slidably provided with a cross brace 303 perpendicular to the wall surface, a pair of clamping bars 304 are fixed on the cross brace 303, one end portions of the clamping bars 304 protrude out of the grouting pipe 3, a pair of matching rods 206 are arranged on a pair of opposite surfaces of the rotating plate 204, the matching rods are L-shaped, one end of each matching rod is fixed on the surface of the rotating plate 204 on one side of the limiting plate 205, the other end of each matching rod is parallel to the surface of the rotating plate 204 and is flush with the side wall of the rotating plate 204, a clamping hole is formed in an inward concave manner at the end portion of the other end of each matching rod 206, and when the rotating plate 204 rotates to a state that the axis of each matching rod 206 is perpendicular to the axis of the limiting pipe 2, the protruding end portions of the matching rods 206 are just clamped in the clamping holes of the matching rods 206.

In the above technical solution, when the rotating plate 204 rotates to eject the filtering elastic sheet 101, it must be vertical in the limiting tube 2, that is, along the central axis of the limiting tube 2, and the central axis of the rotating plate 204 is horizontal and perpendicular to the central axis of the limiting tube 2, in order to make the rotating plate 204 always prop against the filtering elastic sheet 101, prevent it from touching the mouth of the air bag tube 1 again, affecting grouting, on the other hand, the rotating plate 204 is positioned as a vertical device, which has minimal effect on grouting, so that the transverse brace 303 is disposed in the grouting tube 3, the transverse brace 303 is a rod body whose two ends can slide along the inner wall of the length direction of the grouting tube 3 in a small range, the spatial effect on the grouting tube 3 is small, and when the rotating plate 204 rotates to be in a vertical state, the sliding transverse brace 303 makes a pair of clamping bars 304 on the rotating plate 204 clamped in the clamping holes of the pair of matching rods 206, so as to limit the rotating plate 204.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (7)

1. The deep basal pit plugging device, its characterized in that includes:

the air bag tube is a double-layer tube, a hollow cavity is formed between the inner wall and the outer wall, one end part between the inner wall and the outer wall of the air bag tube is sealed, the other end part is connected with an annular filter plate, the filter plate is divided into equal even parts along the circumferential direction of the filter plate, the filter plate and the sealed second plate are mutually staggered and integrally formed, an annular plate is fixed on the surface of the filter plate, which is close to the central axis side of the air bag tube, through a cylindrical plate, the inner diameter of the annular plate is equal to the inner diameter of the filter plate, the annular plate is parallel to the filter plate, a filtering elastic sheet is just clamped between the filter plate and the annular plate, the annular plate is circular, a plurality of filter holes are formed in the filtering elastic sheet, a plurality of first holes are formed in the outer wall of the air bag tube at intervals along the circumferential direction and the length direction of the air bag tube, and a plurality of second holes are formed in the circumferential direction of the inner wall of the air bag tube at equal intervals;

the outer diameter of the baffle is identical to the inner diameter of the outer wall of the air bag pipe, the inner diameter of the baffle is slightly smaller than the inner diameter of the inner wall of the air bag pipe, the baffle is tightly adhered to the filter plate and is inserted into the hollow cavity of the air bag pipe in a sealing way, a plurality of third holes which are in one-to-one correspondence with the second holes and have the same diameter are formed in the periphery of the limiting pipe in a circle, a rotating shaft perpendicular to the inner wall is fixed on the inner wall of the limiting pipe between the baffle and the third holes, the rotating shaft penetrates through the central axis of the limiting pipe, a circular rotating plate which has the same inner diameter as the limiting pipe is sleeved on the rotating shaft, the rotating plate can rotate in the limiting pipe by taking the rotating shaft as an axis, and the radius of the rotating plate is larger than the interval between the filtering elastic piece and the rotating shaft;

the grouting pipe is provided with a clamping structure in a sleeved mode, which is close to the outer wall circumference of one end portion, and the grouting pipe can be just clamped in a plurality of corresponding second holes and third holes.

2. The deep foundation pit plugging device according to claim 1, wherein a plurality of grooves are formed in the outer wall of the grouting pipe in a circumferential manner in an inward recessed manner, first springs are arranged in the grooves, the depth of the first springs in a free state is equal to that of the grooves, the clamping structure comprises a sleeve and a plurality of clamping columns, the sleeve is just sleeved on the outer wall of the grouting pipe, one end of the sleeve is flush with one end of the grouting pipe, a plurality of through holes penetrating through the sleeve are formed in the sleeve in a circumferential manner, and a pair of concave holes are formed in the through holes in a recessed manner along the radial direction opposite to the sleeve; the clamping columns are matched with the second holes and the third holes in a corresponding mode, the clamping columns are matched with the grooves in a one-to-one mode, a pair of opposite concave channels are formed in the outer walls of the clamping columns in an inward concave mode, second springs are arranged in the concave channels, the second springs are connected with the baffle columns, and the baffle columns are matched with the concave holes and are longer than the concave holes.

3. The deep foundation pit plugging device of claim 2, wherein the clamping structure further comprises a plurality of circular arc-shaped sector plates, one ends of the arc-shaped edges of the circular arc-shaped sector plates opposite to the tips of the circular arc-shaped sector plates are hinged to the end of the sleeve which is flush with the grouting pipe, the arc-shaped edges of the circular arc-shaped sector plates opposite to the tips of the circular arc-shaped sector plates just form a circle with the diameter equal to that of the sleeve, and the circular arc-shaped sector plates just form a complete sealed conical-like sealing plate.

4. The deep foundation pit plugging device of claim 1, wherein the inner wall of the limiting pipe is provided with a semicircular limiting plate with a vertical wall surface, which is close to the rotating shaft and is located between the baffle and the rotating shaft.

5. The deep foundation pit plugging device according to claim 2, wherein the outer wall of the end part of the air bag pipe facing outwards is provided with a plurality of scale marks of extending lines passing through the central axes of the second holes correspondingly, the outer wall of the end part of the limiting pipe facing outwards is also provided with a plurality of scale marks of extending lines passing through the central axes of the third holes, the number of the second holes and the third holes is equal to the number of the filter plates which are equally divided, and the central axes of the first plates and the second plates on the filter plates are in one-to-one correspondence with and parallel to the scale marks.

6. The deep foundation pit plugging device of claim 1, further comprising an auxiliary plate and an observation tube, wherein the auxiliary plate is just matched in the limiting tube, the auxiliary plate is further provided with a through hole penetrating through the upper bottom surface and the lower bottom surface of the auxiliary plate, and the observation tube is L-shaped, one end of the observation tube is communicated with the through hole in a sealing manner, and the other end of the observation tube penetrates out of the limiting tube and vertically upwards.

7. The deep foundation pit plugging device of claim 4, wherein the inner wall of the grouting pipe is slidably provided with a cross brace perpendicular to the wall surface, a pair of clamping bars are fixed on the cross brace, one end parts of the clamping bars protrude out of the grouting pipe, a pair of matching rods are arranged on a pair of opposite surfaces of the rotating plate, the matching rods are L-shaped, one end of each matching rod is fixed on the surface of the rotating plate on one side of the limiting plate, the other end of each matching rod is parallel to the surface of the rotating plate and is flush with the side wall of the rotating plate, a clamping hole is formed in the end part of the other end of each matching rod in an inward concave manner, and when the rotating plate rotates to be in a state that the axis of each matching rod is perpendicular to the central axis of the limiting pipe, the protruding end parts of the matching rods are just clamped in the clamping holes of the matching rods.