CN220686115U - Basin-type curtain structure with strong permeable layer in pit - Google Patents

Abstract

The utility model relates to a technical field of building foundation construction has improved the poor problem of hole stagnant water structure stagnant water effect in current hole, has disclosed the basin-type curtain structure of the strong permeable layer in hole, including setting up waterproof layer and the laminating in the foundation ditch diapire and enclosing the curtain that locates outside the waterproof layer, the waterproof layer includes a plurality of waterproof piles of array setting and sequential looks interlock, the curtain includes a plurality of sequential looks interlock's curtain piles, all waterproof piles and curtain piles are plum blossom shape full red arrangement and form the basin form, the top surface of waterproof layer is dug and is equipped with the pit groove. After the foundation pit is excavated, driving a waterproof layer and a curtain wall into a position of the bottom of the foundation pit, which is required to be excavated, and then, excavating a pit slot in the waterproof layer according to the calibration; the underground water cannot infiltrate into the pit slot due to the blocking of the waterproof layer and the curtain wall in the excavation process, the waterproof layer and the curtain wall are high in hardness, the waterproof layer can be prevented from being propped through due to excessive water pressure, and the water stopping effect is good; the application has the advantages of simple structure, convenient and quick construction, reduced cost and improved efficiency.

Description

Basin-type curtain structure with strong permeable layer in pit

Technical Field

The application relates to the technical field of building foundation construction, in particular to a basin-type curtain structure of a pit-in-pit strong permeable layer.

Background

In the foundation construction process of some buildings such as elevators and water collecting wells, after the basement large foundation pit is constructed and excavated to the bottom elevation of the designed pit, the parts of the elevator pit and the water collecting well are further excavated downwards to form local small pits, namely pit-in-pit pits. The pit in the pit is positioned in a deeper layer of the foundation pit and is easy to encounter strong permeable layers such as sand, eggs, gravel and the like, so that the water stopping structure with good waterproof performance is needed for the pit in the pit so as to prevent groundwater from penetrating into the pit in the pit from the strong permeable layers.

However, in the existing pit-in-pit water stopping structure, a layer of stirring piles or jet grouting pile curtains are arranged on the periphery of a pit, dewatering wells are arranged around the pit or even in the middle of the pit, then water in the pit is sucked cleanly through a water pump, the water pump is left in the well when the dewatering wells are sealed, and the water pump is used for pumping water when the water in the pit permeates water again, so that a water stopping effect is not achieved, and even the water level is pumped upwards. Or, after water is pumped to the position below the elevation of the pit bottom, when the waterproof cushion layer is beaten at the pit bottom, the situation of power failure or pump burning out occurs, so that the water level rises again, the cushion layer is penetrated by water pressure, the cushion layer is required to be chiseled off, the construction is performed again, time and labor are wasted, and the construction cost is increased.

Disclosure of Invention

In order to improve the defect that the water stopping effect of the existing pit-in-pit water stopping structure is poor, the application provides a pit-in-pit basin-type curtain structure with a strong permeable layer.

The application provides a pit-in-pit strong permeable layer basin-type curtain structure, adopts following technical scheme:

the pit-in-pit strong permeable layer basin-type curtain structure comprises a waterproof layer arranged in the bottom wall of a foundation pit and a curtain wall attached and enclosed outside the waterproof layer, wherein the waterproof layer comprises a plurality of waterproof piles which are arranged in an array and are sequentially meshed, the curtain wall comprises a plurality of curtain piles which are sequentially meshed, and a pit slot is dug in the top surface of the waterproof layer.

After the foundation pit is excavated, driving a water-proof pile and a curtain pile which is adhered and surrounded by the water-proof pile at the position of the foundation pit bottom corresponding to the position of the elevator pit, the water-collecting well and the like, which are required to be excavated, wherein the water-proof pile and the curtain pile can be manufactured by adopting the same method, and then pit slots are excavated in a waterproof layer according to the calibration; the underground water is not permeated into the pit slot by being blocked by the waterproof layer and the curtain wall in the excavation process, a water pump is not needed to pump water, the hardness of the waterproof layer and the curtain wall is high, the situation that the waterproof layer is penetrated by the top of the waterproof layer due to excessive water pressure is avoided, curtain piles are arranged around the pit slot after the pit slot is excavated, water-proof piles are arranged at the bottom of the pit slot, and gaps exist between adjacent water-proof piles or curtain piles, so that a good water-proof effect can be achieved; simple structure, construction convenient and fast, the cost is reduced, has improved efficiency.

Optionally, the part above the elevation of the bottom of the pit slot of the water-proof pile is a hollow hole, and the hollow hole is filled with a slurry return.

Through adopting above-mentioned technical scheme, need not whole stake and all fill cement mortar when driving into the water proof stake, leave the sky hole above the tank bottom elevation of pit slot to make water proof stake and curtain stake all around form a "basin form", so that excavate the pit slot in basin form inside, at last in being less than the sky hole of pit slot lateral wall in pour into cement return thick liquid can, further improved the efficiency of construction, still reduced the material, reduced the cost.

Optionally, all the waterproof piles and the curtain piles are arranged in a quincuncial full-red shape.

By adopting the technical scheme, the full-framing arrangement is that all adjacent waterproof piles and curtain piles are closely meshed and distributed to form a piece, gaps are avoided, the cross sections of the waterproof layers and the curtain walls are arranged like plum blossom, the strength and the bearing capacity of the waterproof layers and the curtain walls can be improved, the possibility of cracking and damaging the waterproof piles and the curtain piles is reduced, and the building quality is improved.

Optionally, the curtain wall comprises two circles of curtain piles.

By adopting the technical scheme, the two circles of curtain piles can further improve the water stopping effect, reduce the possibility of infiltration of underground water from the periphery of the pit slot, further improve the strength of the curtain wall and reduce the possibility of cracking the top of the curtain wall when the pressure of the underground water is increased.

Optionally, a reinforcement is inserted in the middle part in the curtain pile along the length direction.

By adopting the technical scheme, the stability of the curtain pile can be further improved by the reinforcement, the possibility of bending and splitting of the curtain pile is reduced, the supporting effect is achieved on the pit, and the building quality is improved.

Optionally, the side walls in the pit are vertically arranged along the vertical direction.

Through adopting above-mentioned technical scheme, can adopt directly digging perpendicularly to establish the pit, the construction is simple, and can increase the pit inner space, reduces the possibility to building foundation soil disturbance, makes the structure of building on pit upper portion more stable.

Optionally, the pit is flared towards the notch direction at the top.

By adopting the technical scheme, the pit slot can also be set into a structure with a large upper opening and a small lower opening, and the inclined slot wall structure is more stable.

Optionally, the distance between the bottom elevation of the pit and the bottom surface of the waterproof layer is at least 1 meter.

By adopting the technical scheme, the waterproof layer at the bottom of the pit is at least 1 meter, and when the pit is 1 meter, a better water stopping effect can be achieved under the condition of least used materials.

In summary, the present application includes at least one of the following beneficial effects:

1. after the foundation pit is excavated, the waterproof layer and the curtain wall are firstly driven into the pit position, such as the foundation pit bottom, corresponding to the elevator pit, the water collecting well and the like, in which the pit is required to be excavated, and the basin-shaped pit slot is formed in the waterproof layer according to the calibration, the waterproof layer and the curtain wall are isolated in the excavation process, and the underground water cannot infiltrate into the pit slot, so that a water pump is not required to be adopted for pumping water, the structure is simple, the construction is convenient and quick, the cost is reduced, and the efficiency is improved;

2. after the pit is dug, curtain piles and waterproof piles are arranged around the pit, the hardness of the waterproof layer and the curtain wall is high, the situation that the waterproof layer is penetrated by the top of the waterproof layer due to overlarge water pressure is avoided, and gaps exist between the adjacent waterproof piles or curtain piles, so that a good water stopping effect can be achieved;

3. when the water-proof pile is driven, the whole pile is not required to be filled with cement mortar, and a hollow hole is reserved at the position above the elevation of the bottom of the pit so as to facilitate the pit to be excavated, and finally, the hollow hole lower than the side wall of the pit is filled with cement mortar, so that the construction efficiency is further improved, and the cost is reduced.

Drawings

FIG. 1 is a cross-sectional view of a well-in-well strongly permeable layer basin-type curtain construction in accordance with an embodiment of the present application;

FIG. 2 is a top view of a basin-type curtain construction of a pit-in-pit highly permeable layer in a pit according to an embodiment of the present application;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 4 is a cross-sectional view of a pit-in-pit strongly permeable layer basin-type curtain construction in a second embodiment of the present application;

FIG. 5 is a top view of a pit-in-pit strongly permeable layer basin-type curtain construction in a second embodiment of the present application;

FIG. 6 is a cross-sectional view of a pit-in-pit highly permeable layer basin-type curtain construction in a third embodiment of the present application;

FIG. 7 is a top view of a well-in-well strongly permeable layer basin-type curtain construction in a third embodiment of the present application;

FIG. 8 is a cross-sectional view of a pit-in-pit highly permeable layer basin-type curtain construction in a fourth embodiment of the present application;

FIG. 9 is a top view of a well-in-well strongly permeable layer basin-type curtain construction in accordance with an embodiment of the present application;

reference numerals illustrate: 1. a foundation pit; 2. pit slots; 3. a waterproof layer; 4. a water-proof pile; 5. curtain walls; 6. curtain piles; 7. a hollow hole; 8. returning slurry; 9. and (3) a reinforcement.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-9.

Embodiment one:

referring to fig. 1, the embodiment of the application discloses a basin-type curtain structure with a pit-in-pit strong permeable layer, which comprises a waterproof layer 3 arranged in the bottom wall of a foundation pit 1 and a curtain wall 5 attached and enclosed outside the waterproof layer 3, wherein the waterproof layer 3 and the curtain wall 5 form a basin shape, and a pit slot 2 is dug in the top surface of the waterproof layer 3. Firstly, the foundation pit 1 is dug and set, then the waterproof layer 3 and the curtain wall 5 are driven into the positions, corresponding to the elevator pit, the water collecting well and the like, of the bottom of the foundation pit 1, which are required to be dug and set, pit slots 2 are dug and set in the waterproof layer 3 according to the calibration to form pits in the pits, the waterproof layer 3 and the curtain wall 5 are separated in the digging process, groundwater cannot permeate into the pit slots 2, a water pump is not required to be adopted for pumping water, the structure is simple, the construction is convenient and quick, the cost is reduced, the efficiency is improved, the compressive strength of the waterproof layer 3 and the curtain wall 5 is high, and the occurrence of the condition of high-pressure water top crack is avoided.

Referring to fig. 2, in particular, the waterproof layer 3 includes a plurality of waterproof piles 4 arranged in an array and sequentially engaged, the plurality of waterproof piles 4 may be in a circumferential array or a rectangular array, preferably a rectangular array so as to facilitate subsequent excavation of the pit 2, and the curtain wall 5 includes a plurality of curtain piles 6 sequentially engaged, and for facilitating construction, the waterproof piles 4 and the curtain piles 6 are vertically arranged, and the diameters and the bottom heights of the waterproof piles 4 and the curtain piles 6 are identical. The water-barrier piles 4 and the curtain piles 6 may be stirring piles or jet grouting piles, and preferably, the water-barrier piles 4 and the curtain piles 6 are jet grouting piles manufactured by adopting a jet grouting machine, and compared with the stirring piles, the compression strength and the density of the jet grouting piles are higher.

The jet grouting pile is a high-pressure jet grouting method, the jet grouting machine comprises a drill bit, a nozzle is arranged on the drill bit, the drill bit firstly drills downwards, preferably, the drill bit drills into a position 1 m below the bottom elevation of the pit 2, so that a better water stopping effect can be achieved under the condition of least materials, then the drill bit rotates and lifts up, concrete slurry is sprayed out of the nozzle at a high speed, and columnar concretes with larger inner diameters than the drill hole are formed in soil, namely the water-proof piles 4 or curtain piles 6. In order to reduce cost and facilitate construction, the part of the water-proof pile 4 above the elevation of the bottom of the pit 2 is provided with a hollow hole 7, namely, when the water-proof pile 4 is sprayed by rotation, the drill bit can stop spraying concrete slurry when being lifted to the elevation of the pit 2, the waterproof layer 3 and the curtain wall 5 form a basin shape with a groove, and the groove in the basin shape is provided with slurry returning 8 or gravel sand, but the excavation of the pit 2 is convenient, time-saving and labor-saving, the waste of materials is reduced, and finally, the hollow hole 7 on the side wall of the pit 2 is filled with the slurry returning 8. In addition, the top of the curtain pile 6 can be provided with a hollow hole 7, and the bottom of the hollow hole 7 is at least 0.3 meter below the bottom elevation of the foundation pit 1 pit, so that the back slurry after the rotary spraying can be filled outwards, the work of cleaning by subsequent workers is reduced, and the back slurry can be fully utilized.

Optionally but not limited, the drill bit of the rotary spraying machine preferably adopts a long spiral drill bit, the rotary spraying equipment of the long spiral drill bit has high power and high torque, the verticality is guaranteed, no hole guiding is needed, the stirring rotary spraying is finished in one step, the designed pile length, pile diameter and verticality can be better achieved, the water stopping effect is better, a stone stratum or a gravel stratum containing large blocks is easier to penetrate, and the occurrence of hole collapse is reduced.

Further, referring to fig. 3, all the waterproof piles 4 and the curtain piles 6 are arranged in a quincuncial full-red manner, namely, all the adjacent waterproof piles 4 and curtain piles 6 are meshed and distributed, and the cross sections such as the quincuncial arrangement, no gaps exist between the waterproof piles 4 and the curtain piles 6, so that the strength and bearing capacity of the waterproof layer 3 and the curtain wall 5 can be improved, the possibility of cracking and damaging the waterproof piles 4 and the curtain piles 6 is reduced, and the building quality is improved. It should be noted that, curtain pile 6 immediately adjacent to water-proof pile 4 is required to be offset 0.3 m toward the center of pit 2, so that construction is facilitated and engagement between jet grouting piles is ensured.

In this embodiment, in order to facilitate construction, the side wall in the pit 2 is vertically arranged along the vertical direction, so that the pit 2 can be directly and vertically dug out, the possibility of disturbing the foundation land of the building is reduced, the internal space of the pit 2 can be increased, and the building structures such as the elevator built on the upper portion of the pit 2 are more stable. At this time, the cross-sectional area of the waterproof layer 3 may be slightly larger than the cross-sectional area of the pit 2.

Furthermore, in order to reduce and improve the stability of the curtain pile 6, a reinforcement 9 is inserted in the middle part in the curtain pile 6 along the long direction, the reinforcement 9 can be I-steel or H-steel, the reinforcement 9 can also be a precast pile or other material pile, preferably I-steel, and the length of the reinforcement 9 is consistent with the spin-spraying height of the curtain pile 6; the I-steel can be arranged in a dense-inserting mode, a second-jumping-one-inserting mode and a first-jumping-one-inserting mode, and preferably, the dense-inserting mode is adopted, namely, the reinforcing members 9 are inserted into each curtain pile 6, and the reinforcing members 9 can further support the pit slots 2, so that the building quality is improved.

The implementation principle of the first embodiment of the application is as follows:

after the foundation pit 1 is excavated, corresponding to the positions of an elevator pit, a water collecting well and the like which need to be excavated in the pit, at the bottom of the foundation pit 1, calibrating pile positions according to a full-red layout according to the design, sequentially spraying waterproof piles 4 and curtain piles 6 which are adhered and encircled with the waterproof piles 4 in a rotary spraying machine to the pile positions, forming a basin shape with grooves by the waterproof piles 4 and the curtain piles 6, inserting reinforcing members 9 into the curtain piles 6 before the curtain piles 6 are solidified, and then excavating pit slots 2 in the waterproof layer 3 according to the calibration; in the process of excavating the pit slot 2, because the underground water is blocked by the waterproof layer 3 and the curtain wall 5 and does not infiltrate into the pit slot 2, a water pump is not needed to pump water, the waterproof layer 3 and the curtain wall 5 have high hardness, the situation that the waterproof layer 3 is propped through due to overlarge water pressure is avoided, and the waterproof layer is simple and stable in structure and convenient and quick to construct; after the pit 2 is dug, curtain piles 6 are arranged around, and water-proof piles 4 are arranged at the bottom, so that a good water-stopping effect can be achieved.

Embodiment two:

referring to fig. 4 and 5, the embodiment of the present application discloses a basin-type curtain structure with a strong permeable layer in a pit, which is different from the first embodiment in that, in order to further improve the compressive strength and the water-stopping effect of the curtain wall 5, the curtain wall 5 includes two rings of curtain piles 6, all other structures are the same, all the curtain piles 6 are arranged in a quincuncial full red, and the two layers of curtain piles 6 can reach higher strength requirements. The reinforcement 9 may be inserted into the curtain pile 6 located at the outer periphery of the pit slot 2, or the reinforcement 9 may not be inserted into the curtain pile.

Embodiment III:

referring to fig. 6 and 7, the embodiment of the application discloses a basin-type curtain structure with a strong permeable layer in a pit, which is different from the first embodiment in that a pit slot 2 is flared towards the notch direction of the top, the pit slot 2 is of a structure with a large upper opening and a small lower opening, a reinforcement 9 can be inserted into a curtain pile 6 in the embodiment, the reinforcement 9 can also not be inserted into the curtain pile 6, and the structure of the pit slot 2 can be firmer by the inclined slot wall, so that construction materials can be further reduced, and the cost can be reduced. It should be noted that, since the portion of the water-proof pile 4 above the elevation of the bottom of the pit 2 is set as the hollow hole 7, and the wall of the pit 2 is inclined upward, the hollow hole 7 on the side wall of the pit 2 is filled with the cement slurry returning liquid 8.

Embodiment four:

referring to fig. 8 and 9, the embodiment of the application discloses a basin-type curtain structure of a pit-in-pit strong permeable layer, which is further optimized on the basis of the second embodiment or the third embodiment, and the curtain wall 5 comprises two circles of curtain piles 6, wherein all the curtain piles 6 are arranged in a quincuncial full red.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. Pit in pit is permeable layer basin-type curtain structure by force, its characterized in that: including setting up waterproof layer (3) in foundation ditch (1) diapire and laminating enclose and locate waterproof layer (3) outer curtain wall (5), waterproof layer (3) are including a plurality of waterproof stake (4) of array setting and successive looks interlock, curtain wall (5) are including a plurality of successive looks interlock's curtain stake (6), the top surface of waterproof layer (3) is dug and is equipped with pit (2).

2. The in-pit, highly permeable layer basin-type curtain construction of claim 1, wherein: the part above the elevation of the bottom of the pit slot (2) of the water-proof pile (4) is a hollow hole (7), and the hollow hole (7) is filled with a slurry returning liquid (8).

3. The in-pit, highly permeable layer basin-type curtain construction of claim 1, wherein: all the waterproof piles (4) and the curtain piles (6) are arranged in plum blossom-shaped full red.

4. A pit-in-pit highly permeable layer basin-type curtain construction according to claim 3, wherein: the curtain wall (5) comprises two circles of curtain piles (6).

5. The in-pit, highly permeable layer basin-type curtain construction of claim 1, wherein: a reinforcement (9) is inserted in the middle part in the curtain pile (6) along the long direction.

6. The in-pit, highly permeable layer basin-type curtain construction of claim 1, wherein: the side walls in the pit slots (2) are vertically arranged along the vertical direction.

7. The in-pit, highly permeable layer basin-type curtain construction of claim 1, wherein: the pit slots (2) are arranged in a flaring way towards the notch direction of the top.

8. The in-pit, highly permeable layer basin-type curtain construction of claim 1, wherein: the distance between the bottom elevation of the pit (2) and the bottom surface of the waterproof layer (3) is at least 1 meter.