CN217782086U - Water retaining construction structure of foundation pit - Google Patents
Water retaining construction structure of foundation pit Download PDFInfo
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- CN217782086U CN217782086U CN202222197403.2U CN202222197403U CN217782086U CN 217782086 U CN217782086 U CN 217782086U CN 202222197403 U CN202222197403 U CN 202222197403U CN 217782086 U CN217782086 U CN 217782086U
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Abstract
The utility model provides a manger plate construction structures of foundation ditch for form elevator hole and sump pit in the foundation ditch, the bottom elevation of treating this sump pit that forms is less than the bottom elevation of treating this elevator hole that forms, and this manger plate construction structures includes: the first water stop is arranged in the foundation pit and surrounds an elevator pit and a water collecting pit to be formed, and the first water stop is fixedly connected with the reinforcement cage; pouring a backfill layer formed at the bottom of the foundation pit; and a grouting layer formed on the top of the backfill layer in a pouring mode, wherein the elevator pit and the water collecting pit are formed in the grouting layer. The utility model discloses a set up first waterstop and surround elevator hole and sump pit to avoid the water of percolating water or piping to continuously get into elevator hole and sump pit, pour the formation backfill layer through the bottom in elevator hole and sump pit, with the ability of blocking water that improves the lower department of bottom elevation, thereby improved the stability of elevator hole and sump pit.
Description
Technical Field
The utility model relates to a foundation ditch construction technical field especially relates to a manger plate construction structures of foundation ditch.
Background
In the current super high-rise project, the thickness of a tower floor bottom plate reaches up to several meters, and if the thickness of an elevator pit and a water collecting pit is added, the total thickness from the pit bottom to the tower floor bottom plate concrete surface layer can reach 8m or even more than 10 m. As is known, earth excavation is required to be completed before bottom plate construction, and the premise of determining whether the construction site has earth excavation is that precipitation meets the design and specification requirements, and generally, the precipitation needs to be reduced to 500mm below the construction working surface to perform earth excavation. However, the construction of the waterproof curtain around the foundation pit is mostly an appointed unit of an owner, a structural construction unit cannot confirm whether the construction quality of the waterproof curtain meets the enclosure design requirement, if the waterproof curtain leaks, precipitation work in the foundation pit is seriously influenced, even the inner and outer water sources of the foundation pit are communicated, so that the water pressure in the foundation pit is increased, piping possibly occurs at any time in the excavation process, and the life safety of construction operators and the safety of the foundation pit are threatened.
SUMMERY OF THE UTILITY MODEL
In view of the above circumstances, the utility model provides a manger plate construction structures of foundation ditch has solved the technical problem of maintenance difficulty when elevator hole and sump pit take place to seep water in traditional construction, surrounds elevator hole and sump pit through setting up first waterstop to the water of avoiding leaking water or piping lasts gets into elevator hole and sump pit, through pouring the formation backfill layer in the bottom of elevator hole and sump pit, with the ability of blocking water that improves the lower department of bottom elevation, thereby improved the stability of elevator hole and sump pit.
In order to achieve the purpose, the utility model adopts the technical proposal that:
the utility model provides a manger plate construction structures of foundation ditch for form elevator hole and sump pit in the foundation ditch, the bottom elevation that treats this sump pit that forms is less than the bottom elevation that treats this elevator hole that forms, and this manger plate construction structures includes:
the first water stop is arranged in the foundation pit and surrounds an elevator pit and a water collecting pit to be formed, and the first water stop is fixedly connected with the reinforcement cage;
pouring a backfill layer formed at the bottom of the foundation pit; and
and pouring a grouting layer formed on the top of the backfill layer, wherein the elevator pit and the water collecting pit are formed in the grouting layer.
The utility model discloses the manger plate construction structures's of foundation ditch further improvement lies in, still is less than the bed course of the bottom elevation that this elevator hole including backfilling in the bottom of this sump pit and top elevation.
The utility model discloses the manger plate construction structures's of foundation ditch further improvement lies in, and the concrete intensity on this backfill layer is greater than the concrete intensity on this slip casting layer.
The utility model discloses the manger plate construction structures's of foundation ditch further improves and lies in, still including setting up in the foundation ditch and being located the second waterstop in the outside of this first waterstop, this first waterstop is enclosed to this second waterstop.
The utility model discloses the manger plate construction structures of foundation ditch further improves and lies in, still keeps away from the water retaining layer of the lateral part of this first waterstop including setting up in the foundation ditch and putting this second waterstop, and this water retaining layer surrounds this second waterstop.
The utility model discloses the manger plate construction structures's of foundation ditch further improvement lies in, and this first waterstop and this second waterstop are made by the concatenation of a plurality of stagnant water steel sheet head and the tail.
The utility model discloses the manger plate construction structures's of foundation ditch further improvement lies in, still including bury underground in this backfill layer with the steel reinforcement cage on this slip casting layer, this first waterstop and steel reinforcement cage fixed connection.
The utility model discloses the manger plate construction structures's of foundation ditch further improvement lies in, and this first waterstop the latter half is buried underground in this backfill in situ and the first half is buried underground in this slip casting in situ.
The utility model discloses the manger plate construction structures of foundation ditch encloses the first waterstop of the outside of locating elevator hole and sump pit through the setting, thereby can cut the water in the soil layer and continuously permeate and get into elevator hole and sump pit when elevator hole and sump pit take place the seepage, through pouring the formation bed course in the sump pit, get into the lower sump pit of relief with avoiding permeating water, avoid permeating water to continuously get into elevator hole and sump pit, the stability of elevator hole and sump pit has been improved, through the lateral part looks lateral part expansion with the sump pit, sump pit retaining capacity has been maintained, the retaining capacity of sump pit descends after avoiding pouring the bed course, through setting up second waterstop and reinforcing band, in order to improve the manger plate efficiency to elevator hole and sump pit, pour the formation backfill layer through the bottom in elevator hole and sump pit, in order to block the infiltration of bottom.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is the utility model discloses the side section view of the manger plate construction structures of foundation ditch.
Fig. 2 is the utility model discloses manger plate construction structures's of foundation ditch overlook the cross-sectional view.
The correspondence of reference numerals to components is as follows: grouting layer 1, elevator hole 2, sump pit 3, mid-board 4, bed course 5, backfill layer 6, first waterstop 7, second waterstop 8, water retaining layer 9.
Detailed Description
To facilitate understanding of the present invention, the following description is made with reference to the accompanying drawings and examples.
Please refer to fig. 1 to 2, the utility model provides a manger plate construction structures of foundation ditch supplies to form elevator in the foundation ditch and pits 2 and catch pit 3, treats that the bottom elevation of this catch pit 3 that forms is less than the bottom elevation of this elevator hole 2 that treats to form, and this manger plate construction structures includes:
the first water stop belt 7 is arranged in the foundation pit and surrounds the elevator pit 2 and the water collecting pit 3 to be formed, and the first water stop belt 7 is fixedly connected with the reinforcement cage;
pouring a backfill layer 6 formed at the bottom of the foundation pit; and
and pouring a grouting layer 1 formed on the top of the backfill layer 6, wherein the elevator pit 2 and the water collecting pit 3 are formed in the grouting layer 1.
The utility model discloses a preferred embodiment of the manger plate construction structures of foundation ditch does, still including backfilling in the bottom of this sump pit 3 and the bed course 5 that the top elevation is less than the bottom elevation of this elevator hole 2.
Preferably, the actual width of the sump 3 is larger than the designed width to avoid the reduction of the water storage capacity of the sump after the mat 5 is poured.
Preferably, the elevator pit 2 and the sump pit 3 are separated by an intermediate wall 4.
Further, the concrete strength of the backfill layer 6 is greater than that of the grouting layer 1.
Further, the foundation pit further comprises a second water stop 8 arranged in the foundation pit and positioned on the outer side of the first water stop 7, and the second water stop 8 surrounds the first water stop 7.
Furthermore, the water-retaining device further comprises a water-retaining layer 9 which is arranged in the foundation pit and is positioned at the side part of the second water-retaining strip 8 far away from the first water-retaining strip 7, and the water-retaining layer 9 surrounds the second water-retaining strip 8.
Preferably, the water retaining layer 9 is formed by splicing Larsen steel sheet piles end to end, the Larsen steel sheet piles are driven into the soil layer before the foundation pit is excavated so as to surround the foundation pit to be excavated, then precipitation construction is carried out through a precipitation well in the foundation pit, and when the water level is reduced to a set height, the foundation pit is excavated.
Preferably, the first water stop 7 and the second water stop 8 are made of a plurality of water stop steel plates which are spliced end to end.
Further, still include bury in this backfill layer 6 with the steel reinforcement cage on this slip casting layer underground, this first waterstop and steel reinforcement cage fixed connection, second waterstop 8 and steel reinforcement cage fixed connection.
Specifically, the lower half of the first water stop 7 is embedded in the backfill layer 6 and the upper half is embedded in the grouting layer 1.
Preferably, the top elevation of backfill layer 6 is at one-half the elevation of first and second water stops 7, 8.
The utility model discloses the manger plate construction structures of foundation ditch encloses the first waterstop 7 of the outside of locating elevator hole and sump pit through the setting, thereby can cut the water in the foundation ditch and continuously permeate and get into elevator hole 2 and sump pit 3 when elevator hole 2 and sump pit 3 take place the seepage, through pouring formation bed course 5 in sump pit 3, in order to avoid the seepage to get into lower sump pit 3 of relief, it continuously gets into elevator hole 2 and sump pit 3 to avoid the seepage water, the stability of elevator hole and sump pit has been improved, through the lateral part looks lateral part expansion with sump pit 3, 3 water holding capacity in sump pit has been maintained, the water holding capacity of sump pit descends after avoiding pouring the bed course, through setting up second waterstop 8 and manger plate layer 9, in order to improve the manger plate efficiency to elevator hole and sump pit, pour formation backfill layer 6 through the bottom in elevator hole and sump pit, in order to block the infiltration of bottom.
The utility model discloses the concrete implementation mode of the manger plate construction structures of foundation ditch is, when the foundation ditch excavates to being close to the stratum elevation, when discovering that piping or infiltration take place in the pit bottom of foundation ditch, stop the foundation ditch excavation;
splicing and driving the Larsen steel sheet piles end to end into a soil layer to form a water retaining belt 9 so as to surround a foundation pit to be excavated, carrying out precipitation construction through a precipitation well in the foundation pit, and excavating the foundation pit to a set elevation when the water level is reduced to a set height;
pouring the bottom of the foundation pit to form a bottom plate, and paving a reinforcement cage on the top surface of the bottom plate;
fixedly connecting a plurality of water stop steel plates to a reinforcement cage and enclosing the positions of an elevator pit 2 and a water collecting pit 3 to be formed to form a first water stop belt 7, and fixedly connecting a plurality of water stop steel plates to the reinforcement cage and enclosing the outer side of the first water stop belt 7 to form a second water stop belt 8;
pouring concrete on the top of the bottom plate to form a backfill layer 6, wherein the top elevation of the backfill layer is positioned at half elevation of the first water stop 7 and the second water stop 8;
pouring concrete on the top of the backfill layer 6 to form a grouting layer 1, wherein the concrete strength of the grouting layer 1 is lower than that of the backfill layer 6, and the elevator pit 2 and the water collecting pit 3 are formed in the grouting layer 1;
and backfilling concrete at the bottom of the water collecting pit 3 to form a cushion layer 5, wherein the top elevation of the cushion layer 5 is lower than the bottom elevation of the elevator pit 2.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person can make modifications or changes equivalent to the equivalent embodiment without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides a manger plate construction structures of foundation ditch for form elevator hole and sump pit in the foundation ditch, treat to form the bottom elevation of sump pit is less than and treats to form the bottom elevation of elevator hole, its characterized in that, manger plate construction structures includes:
the first water stop is arranged in the foundation pit and surrounds an elevator pit and a water collecting pit to be formed, and the first water stop is fixedly connected with the reinforcement cage;
pouring a backfill layer formed at the bottom of the foundation pit; and
and pouring a grouting layer formed on the top of the backfill layer, wherein the elevator pit and the water collecting pit are formed in the grouting layer.
2. The water retaining construction structure of a foundation pit according to claim 1, further comprising a cushion layer backfilled at the bottom of the sump pit with a top elevation lower than a bottom elevation of the elevator pit.
3. The water retaining construction structure of a foundation pit according to claim 1, wherein the strength of concrete of the backfill layer is greater than the strength of concrete of the grouting layer.
4. The water-retaining construction structure for a foundation pit according to claim 1, further comprising a second water stop disposed inside the foundation pit and outside the first water stop, the second water stop surrounding the first water stop.
5. The water-retaining construction structure for a foundation pit according to claim 4, further comprising a water-retaining layer disposed in the foundation pit at a side of the second water stop remote from the first water stop, the water-retaining layer surrounding the second water stop.
6. The water stop construction structure of a foundation pit according to claim 5, wherein the first water stop and the second water stop are made of a plurality of water stop steel plates by end-to-end splicing.
7. The water retaining construction structure of a foundation pit according to claim 1, further comprising a reinforcement cage embedded in the backfill layer and the grouting layer, wherein the first water stop is fixedly connected with the reinforcement cage.
8. The water retaining construction structure of a foundation pit according to claim 1, wherein the lower half of the first water stop is embedded in the backfill layer and the upper half is embedded in the grouting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222197403.2U CN217782086U (en) | 2022-08-19 | 2022-08-19 | Water retaining construction structure of foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222197403.2U CN217782086U (en) | 2022-08-19 | 2022-08-19 | Water retaining construction structure of foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217782086U true CN217782086U (en) | 2022-11-11 |
Family
ID=83906145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222197403.2U Active CN217782086U (en) | 2022-08-19 | 2022-08-19 | Water retaining construction structure of foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217782086U (en) |
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2022
- 2022-08-19 CN CN202222197403.2U patent/CN217782086U/en active Active
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