CN114541452A - Foundation pit embedded type double-liquid grouting plugging structure - Google Patents

Abstract

The invention discloses a foundation pit pre-buried type double-liquid grouting leakage stopping structure, which belongs to the technical field of double-liquid grouting leakage stopping and comprises a clamping plate, a grouting hole penetrating through the clamping plate and a grouting pipe with the top end clamped in the grouting hole, wherein the top of the clamping plate is rotatably connected with a covering plate, the covering plate is provided with a matching hole matched with the grouting hole, and the grouting hole is positioned in a vertical plane where the rotating track of the matching hole is positioned. The invention provides a foundation pit embedded type double-liquid grouting plugging structure which can seal grouting holes by rotating a covering plate, so that upwelling leaked slurry in preset holes is reduced.

Description

Foundation pit embedded type double-liquid grouting plugging structure

Technical Field

The invention relates to the field of double-liquid grouting plugging, in particular to a foundation pit embedded type double-liquid grouting plugging structure.

Background

The foundation pit is a soil pit dug on the surface of a construction site as required, and a concrete water stop wall is arranged on the side wall of the foundation pit for digging a deeper foundation pit or a foundation pit with a building nearby, so that the communication of the water layers inside and outside the foundation pit is blocked.

The existing water stop wall is generally formed by piling and pouring through a three-shaft stirring pile machine, and when the three-shaft stirring pile machine works, the water stop wall formed by piling and grouting is easy to deviate, so that a gap is formed at the deviation position of the water stop wall. When underground water exists in the original soil layer on the outer side of the water stop wall, the underground water mixed with sand and soil easily flows into the foundation pit along the gap to generate piping, so that the original soil layer collapses. To solve this problem, a hole is usually drilled and grouted on the ground of the original soil layer.

At present, a construction site usually adopts pre-buried double-liquid grouting to conduct hole leading grouting, cement paste and water glass are injected into a preset hole which is formed beside a water-stop wall in advance through a grouting pipe, when a soil layer collapses, mixed gel of the cement paste and the water glass can be used for performing leak repairing on the collapsed position, and therefore a foundation near the water-stop wall is reinforced.

In view of the related art in the above, the inventors consider that there are drawbacks in that: in the related art, the grouting needs to be carried out through pressure in the double-liquid grouting process, so that cement paste and water glass easily flow out of a preset hole after grouting equipment is removed, the construction site is polluted, the plugging material is wasted, and the inconvenience is brought to plugging.

Disclosure of Invention

In order to reduce the condition that slurry flows out of the preset hole after grouting, the invention provides a foundation pit embedded type double-liquid grouting plugging structure, which can seal the grouting hole by rotating a cover plate, so that the slurry leaking upwards from the preset hole is reduced.

The invention provides a foundation pit embedded type double-liquid grouting plugging structure, which adopts the following technical scheme:

the utility model provides a pre-buried type biliquid slip casting leaking stoppage structure of foundation ditch, includes the joint board, runs through to set up in the injected hole of joint board to and the top joint in the slip casting pipe in injected hole, joint board top rotates and is connected with the apron, set up on the apron with the mating holes of injected hole looks adaptation, wherein, the injected hole is located the mating holes rotates the vertical face at orbit place in.

By adopting the technical scheme, when the matching hole is rotated to be aligned with the grouting hole through the cover plate, the grouting pipe can be communicated with the outside, so that the grouting pipe is convenient to grout; when the cover plate rotates to the mating holes and staggers with the grouting holes, the grouting pipes can be sealed, so that the situation that the grouting pipes upwelling slurry flows to the outside pollution construction site is reduced.

Preferably, the lateral wall of the matching hole is provided with an overflow cavity.

Through adopting above-mentioned technical scheme, when the intraductal thick liquid of slip casting upwelled the excessive time, the overflow chamber can be collected the thick liquid that upwelled to make the thick liquid enter into the overflow chamber, reduce the excessive of thick liquid when removing behind grouting equipment but not sealing the injected hole yet.

Preferably, the top of joint board has seted up the through-hole, the through-hole with be connected with the guide way between the slip casting hole, the overflow chamber is kept away from one side of mating holes has seted up the collection hole, the collection hole run through the bottom of apron and with the guide way communicates mutually.

Through adopting above-mentioned technical scheme, the thick liquid that the overflow chamber was collected can flow into the guide way through the collecting hole, during the through-hole was flowed into to the guide way afterwards, in the foundation of infiltration entering through-hole below at last to further consolidate the foundation of through-hole below, effectively utilize excessive thick liquid simultaneously.

Preferably, the bottom of the cover plate is provided with a scraping blade, the scraping blade is positioned on one side of the bottom opening of the matching hole, which is close to the grouting hole, the guide groove extends along the circumferential direction, the scraping blade is matched with the guide groove, and the side wall of the through hole, which is far away from the guide groove, is provided with a limiting groove matched with the scraping blade.

Through adopting above-mentioned technical scheme, because the guide way extends and doctor-bar and guide way looks adaptation along the circumferencial direction to make the apron slide along the guide way when rotating, thereby scrape the thick liquid of remaining in the guide way and get, make and remain the thick liquid and enter into the through-hole under the promotion of doctor-bar, doctor-bar and spacing groove joint afterwards, thereby carry on spacingly to the rotation of apron.

Preferably, the grouting holes comprise cement paste holes and water glass holes which are arranged at the tops of the clamping plates at intervals, and the grouting pipes comprise cement paste pipes matched with the cement paste holes and water glass pipes matched with the water glass holes.

By adopting the technical scheme, the cement paste and the water glass can be independently grouted respectively, so that the condition that the cement paste and the water glass are mixed with gel in the grouting pipe due to long grouting time is reduced.

Preferably, the outer walls of the cement paste pipe and the water glass pipe are provided with discharge holes, and the discharge holes extend along the oblique downward direction.

Through adopting above-mentioned technical scheme, the discharge opening can play the effect of supplementary slip casting pipe ejection of compact, makes grout and sodium silicate enter into the hole of predetermineeing of ground through seting up in the discharge opening of outer wall, improves grouting efficiency. Simultaneously, the discharge opening that the downwardly extending was seted up can reduce and appear the bounce-back and depend on the condition at the slip casting pipe outer wall after touchhing preset hole lateral wall from discharge opening spun thick liquid to make the thick liquid directly get into as far as possible and predetermine in the hole place ground, improve leaking stoppage effect.

Preferably, conical heads are arranged at the bottoms of the cement paste pipe and the water glass pipe, a cavity is formed in each conical head, the cavity penetrates through the bottom of each conical head and is communicated with the outside, and the inner wall of each conical head is annularly provided with slices.

Through adopting above-mentioned technical scheme, when grout and sodium silicate are impressed through the cone and are predetermine the hole, can be compression deformation under the squeezing action of cone cavity lateral wall, the section is further cut apart grout and sodium silicate simultaneously, thereby destroy the bubble structure that probably exists in grout and the sodium silicate, the structure after making grout and the mixed gel of sodium silicate is more closely knit, improve the gel strength after mixing, improve grout and the sodium silicate volume of predetermineeing the hole and filling simultaneously, further reduce the excessive condition of gushing out on sodium silicate and the grout.

Preferably, the through hole is matched with the matching hole, and the through hole is positioned in a vertical plane where a rotating track of the matching hole is positioned.

Through adopting above-mentioned technical scheme, can make the mating holes rotate to align with the through-hole, at this moment, can be convenient for the staff to observe the through-hole to know the infiltration condition of grout and water glass in the through-hole.

Preferably, the clamping plate is provided with an expansion screw.

Through adopting above-mentioned technical scheme, inflation screw can fix a position the joint board after the ground is nailed into to the inflation screw to make the joint board keep stable as far as possible at the grout in-process.

Preferably, the expansion screw is located adjacent to one side of the through hole.

Through adopting above-mentioned technical scheme, grout or water glass that the through-hole was collected can infiltrate down to the ground at inflation screw lower extreme place to utilize the silicate in grout and the water glass further to consolidate the ground at inflation screw place, and then improve inflation screw's positional stability, reduce the chucking board because of the not hard up condition that appears shifting of ground.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the opening and closing of the grouting holes can be controlled by rotating the cover plate, so that the upwelling and overflowing of the grout in the grouting pipes are reduced;

2. through overflow chamber, collection hole and guide way can make the thick liquid that the slip casting pipe upwelled flow in two through-holes, rotate the cover plate afterwards, when making the cover plate to the slip casting hole confined, the doctor-bar will remain in the thick liquid of guide way pushes away the through-hole, further improves the utilization ratio of thick liquid.

Drawings

Fig. 1 is a schematic diagram of the working state of the embodiment of the present invention.

Fig. 2 is a partial sectional view of fig. 1.

Fig. 3 is an exploded view of an embodiment of the present invention.

Fig. 4 is a schematic structural view of a cover plate in the embodiment of the present invention.

FIG. 5 is a schematic diagram of the alignment of the through hole and the mating hole according to an embodiment of the present invention.

Fig. 6 is a schematic view of the structure of the discharge hole in the embodiment of the invention.

FIG. 7 is a schematic view of a cone structure in an embodiment of the invention.

Description of reference numerals: 1. a foundation; 11. a foundation pit; 12. a water stop wall; 13. presetting holes; 2. a clamping and connecting plate; 3. a grouting pipe; 31. a cement slurry pipe; 32. a water glass tube; 33. a conical head; 34. slicing; 35. a discharge hole; 41. positioning holes; 42. an expansion screw; 51. a guide groove; 52. a through hole; 6. a cover plate; 61. a rotating shaft; 62. a mating hole; 63. an overflow chamber; 64. a collection well; 65. scraping a blade; 66. and (6) positioning a groove.

Detailed Description

The present invention is described in further detail below with reference to figures 1-7.

The embodiment of the invention discloses a foundation pit embedded type double-liquid grouting plugging structure.

Referring to fig. 1 and 2, a foundation pit 11 is dug on a foundation 1, a water stop wall 12 is poured on one side of the foundation pit 11, and the bottom of the water stop wall 12 is embedded in the foundation 1.

Referring to fig. 3, a pre-buried type biliquid slip casting leaking stoppage structure of foundation ditch, including inlaying joint plate 2 of establishing at 1 top of ground, joint plate 2 is located the one side that foundation ditch 11 was kept away from to stagnant water wall 12, 1 surface of ground of laminating mutually with 2 bottoms of joint plate has been seted up and has been preset hole 13, the vertical downwardly extending in hole 13 of presetting, install pivot 61 at 2 tops of joint plate, wear to be equipped with expansion screw 42 at 2 tops of joint plate, foundation 1 is inserted to expansion screw 42's bottom, thereby make expansion screw 42 fix joint plate 2. The number of the expansion screws 42 is two in the present embodiment, and the two expansion screws 42 are symmetrically distributed about the rotation shaft 61.

In addition, the rotating shaft 61 is sleeved with a cover plate 6, and the cover plate 6 is rotatably connected with the rotating shaft 61. Two matching holes 62 are formed in the top of the cover plate 6, and when the cover plate 6 rotates, the two matching holes 62 rotate synchronously along with the cover plate 6, and in the embodiment, the two matching holes 62 are symmetrically distributed about the rotating shaft 61. Simultaneously, set up two grouting holes with 62 looks adaptations of mating holes in the top of joint board 2, be cement paste hole and water glass hole respectively, and cement paste hole and water glass hole all are located the vertical face at mating holes 62 rotation orbit place.

The cement paste pipe 31 and the water glass pipe 32 are respectively clamped in the cement paste hole and the water glass hole, the cement paste pipe 31 and the water glass pipe 32 both downwards extend into the preset hole 13, and the tops of the cement paste pipe 31 and the water glass are respectively flush with the top openings of the cement paste hole and the water glass hole.

The grouting holes can be aligned with the matching holes 62 by rotating the cover plates 6, and after the grouting holes are aligned, the grouting holes are communicated with the matching holes 62, so that grouting equipment can conveniently perform grouting on the grouting pipes 3; the grouting holes can be staggered with the matching holes 62 by rotating the cover plates 6, and the grouting holes are sealed by the staggered cover plates 6, so that the phenomenon that slurry of the grouting pipes 3 overflows upwards is reduced.

Simultaneously, it has two through-holes 52 to run through on one side of expansion screw 42 to be close to at 2 tops of joint plate, two through-holes 52 all with the adaptation of mating holes 62, and all be located the vertical face at mating holes 62 rotation orbit place, one of them through-hole 52 and cement paste hole and another through-hole 52 and water glass all communicate between the hole has guide way 51, and guide way 51 sets up at 2 tops of joint plate and extends along the circumferencial direction.

Referring to fig. 3 and 4, in order to introduce the slurry overflowing the cement slurry pipe 31 and the water glass pipe 32 into the through hole 52, an overflow chamber 63 is opened on the side wall of the fitting hole 62, a collection hole 64 is opened on the side of the overflow chamber 63 away from the fitting hole 62, and the collection hole 64 penetrates through the bottom of the cover plate 6 and is communicated with the guide groove 51.

When the slurry of the slurry injecting pipe 3 overflows through the fitting hole 62, a part of the slurry enters the overflow chamber 63, and the slurry collected in the overflow chamber 63 then flows to the guide groove 51 below through the collecting hole 64 and finally flows to the through hole 52 through the guide groove 51. The overflow of the slurry is reduced by introducing the overflowed slurry into the through-holes 52. Meanwhile, the grout flowing into the through holes 52 seeps into the foundation 1 downwards, and the foundation 1 near the insertion end of the expansion screw 42 is further reinforced by utilizing the cement paste and silicate in the water glass, so that the fixing effect of the expansion screw 42 on the clamping plate 2 is improved, and the condition that the expansion screw 42 fails due to looseness of the foundation 1 is reduced.

Referring to fig. 3 and 5, two wiper blades 65 adapted to the guide slot 51 are fixed at the bottom of the clamping plate 2, and the two wiper blades 65 are respectively located below the bottom openings of the two fitting holes 62. When the grouting hole is aligned with the fitting hole 62, the wiper 65 is fitted to the guide groove 51 and slidably coupled to the guide groove 51. Meanwhile, a positioning groove 66 matched with the scraping blade 65 is formed in the side wall of the through hole 52 far away from the guide groove 51.

When the cover plate 6 is rotated to align the fitting hole 62 with the grouting hole, the scraping blade 65 is positioned on the side of the guide groove 51 close to the grouting hole; subsequently, the cover plate 6 is rotated to the matching hole 62 to be aligned with the through hole 52, in this embodiment, in order to rotate the cover plate 6 clockwise, the scraping blade 65 scrapes the guide groove 51 in the rotating process, so that the slurry remained in the guide groove 51 flows into the through hole 52, and finally, the scraping blade 65 is connected to the positioning groove 66 in a clamping manner, and the rotation of the cover plate 6 is limited, at this time, the matching hole 62 is aligned with the through hole 52, so that the downward permeation condition of the slurry in the through hole 52 can be observed conveniently.

Referring to fig. 3 and 6, discharge holes 35 are formed in the side walls of the cement slurry pipe 31 and the water glass pipe 32, and the openings of the discharge holes 35 extend in the oblique downward direction, so that the slurry in the grouting pipe 3 can enter the preset holes 13 through the discharge holes 35 and reinforce the foundation 1 at the preset holes 13. Simultaneously, when the thick liquid receives grouting equipment's pressure from discharge opening 35 blowout, the decurrent discharge opening 35 of slant can reduce to spray and bounce-back and depend on the condition at 3 outer walls of slip casting pipe behind presetting hole 13 lateral walls, makes the thick liquid directly get into as far as possible and presets the ground 1 at hole 13 place, improves the leaking stoppage effect of thick liquid.

Referring to fig. 3 and 7, a conical head 33 is fixed to the bottom of the grouting pipe 3, and a cavity is opened in the conical head 33 and penetrates the bottom of the conical head 33. A plurality of slices 34 are fixed on the side wall of the cavity, the slices 34 are distributed in an array along the circumferential direction, and in the embodiment, the cutting edge of the slice 34 is open towards the top of the grouting pipe 3.

Since the cavity penetrates through the bottom of the conical head 33, the slurry in the grouting pipe 3 can be ejected from the bottom opening of the conical head 33 and poured into the preset hole 13 under the pressure of the grouting device. Simultaneously, at the thick liquid through conical head 33's in-process, the blade cuts the thick liquid, can destroy the bubble structure in the thick liquid, makes the structure behind grout and the mixed gel of sodium silicate more closely knit to improve leaking stoppage effect. In addition, the denser gel structure consumes more cement paste and water glass, further reducing the overflow of the paste.

The implementation principle of the foundation pit embedded type double-liquid grouting plugging structure provided by the embodiment of the invention is as follows:

a worker digs a preset hole 13 on the surface of the foundation 1 on one side of the water stop wall 12 far away from the foundation pit 11, then the preassembled foundation is clamped on the foundation 1, the grouting pipe 3 extends into the preset hole 13, then expansion screws 42 are respectively screwed into the clamping plates 2 close to two pupils, and the insertion ends of the expansion screws 42 are inserted into the foundation 1.

Then the covering plate 6 is rotated to make the matching hole 62 of the covering plate 6 align with the grouting hole, at this time, the grouting pipe 3 is communicated with the outside, then the two grouting pipes 3 are grouted by grouting equipment, and simultaneously, cement slurry is injected into the cement slurry pipe 31 and water glass is injected into the water glass pipe 32.

The cement paste and the water glass are injected, wherein one part of the cement paste and the water glass are sprayed out from the conical head 33 at the bottom under the action of pressure applied by grouting equipment, and the other part of the cement paste and the water glass are sprayed out from the discharge hole 35 on the side wall. The slices 34 on the inner wall of the conical head 33 at the bottom cut the flowing slurry to destroy the bubble structure in the slurry, so that the structure of the cement slurry and the water glass after gel mixing is more compact, and the overflow of the slurry is reduced; the obliquely downward structure of the discharge port reduces the condition that the slurry is sprayed on the side wall of the preset hole 13 and is rebounded and attached to the grouting pipe 3.

After grouting is finished, mixed gel is generated between cement paste and water glass in the preset hole 13, and when the foundation 1 near the preset hole 13 collapses, the mixed gel automatically flows into the collapsed position to perform leak repairing so as to reinforce the foundation 1 near the water stop wall 12.

The grouting equipment is then removed, and if slurry overflows, the overflowed slurry flows into the overflow cavity 63 before flowing out of the matching hole 62, then is collected to the guide groove 51 on the clamping plate 2 through the collecting hole 64 of the overflow cavity 63, and finally flows into the through hole 52 through the guide groove 51.

Subsequently, the worker rotates the cover plate 6 clockwise to close the grouting hole until the wiper 65 engages with the positioning groove 66, and the wiper 65 pushes the residual grout in the guide groove 51 into the through hole 52 during the rotation.

And then, the worker observes the infiltration condition of the slurry in the two through holes 52 and completes the reinforcement of the foundation 1 after the infiltration is finished.

The above are all preferred embodiments of the present invention, and the present embodiment is only for explaining the present invention, and not for limiting the protection scope of the present invention, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1. The utility model provides a pre-buried type biliquid slip casting leaking stoppage structure of foundation ditch, includes joint board (2), runs through and sets up in the injected hole of joint board (2) to and the top joint in the slip casting pipe (3) of injected hole, its characterized in that: the top of the clamping plate (2) is rotatably connected with a cover plate (6), a matching hole (62) matched with the grouting hole is formed in the cover plate (6), and the grouting hole is located in a vertical plane where a rotating track of the matching hole (62) is located.

2. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 1, wherein: an overflow cavity (63) is formed in the side wall of the matching hole (62).

3. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 2, wherein: through-hole (52) have been seted up at the top of joint board (2), through-hole (52) with be connected with guide way (51) between the slip casting hole, overflow chamber (63) keep away from one side of mating holes (62) has seted up collection hole (64), collection hole (64) run through the bottom of apron (6) and with guide way (51) are linked together.

4. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 3, wherein: the bottom of apron (6) is provided with doctor-bar (65), doctor-bar (65) are located mating holes (62) bottom opening is close to one side of slip casting hole, guide way (51) extend along the circumferencial direction, doctor-bar (65) with guide way (51) looks adaptation, through-hole (52) are kept away from the lateral wall of guide way (51) be provided with the spacing groove of doctor-bar (65) looks adaptation.

5. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 1, wherein: the grouting holes comprise cement paste holes and water glass holes which are arranged at the tops of the clamping plates (2) at intervals, and the grouting pipes (3) comprise cement paste pipes (31) matched with the cement paste holes and water glass pipes (32) matched with the water glass holes.

6. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 5, wherein: discharge holes (35) are formed in the outer walls of the cement paste pipe (31) and the water glass pipe (32), and the discharge holes (35) extend in the oblique downward direction.

7. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 5, wherein: the cement paste pipe is characterized in that conical heads (33) are arranged at the bottoms of the cement paste pipe (31) and the water glass pipe (32), a cavity is formed in the conical heads (33), the cavity penetrates through the bottom of the conical heads (33) and is communicated with the outside, and slices (34) are annularly arranged on the inner wall of each conical head (33).

8. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 3, wherein: the through hole (52) is matched with the matching hole (62), and the through hole (52) is located in a vertical plane where the rotating track of the matching hole (62) is located.

9. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 8, wherein: the clamping plate (2) is provided with an expansion screw (42) in a penetrating way.

10. The foundation pit embedded type double-liquid grouting leaking stoppage structure as claimed in claim 9, wherein: the expansion screw (42) is close to one side of the through hole (52).

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