CN218757559U - Controlled precipitation system for ultra-deep foundation pit - Google Patents
Controlled precipitation system for ultra-deep foundation pit Download PDFInfo
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- CN218757559U CN218757559U CN202223121180.8U CN202223121180U CN218757559U CN 218757559 U CN218757559 U CN 218757559U CN 202223121180 U CN202223121180 U CN 202223121180U CN 218757559 U CN218757559 U CN 218757559U
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Abstract
The utility model relates to an ultra-deep foundation pit controllability precipitation system, include: the system comprises an enclosure structure, a dewatering well, a water level observation well, a recharge well, a drainage pipeline, a prefabricated assembly type drainage ditch and a sedimentation tank; the enclosure structure is arranged on the outer side of the foundation pit, a plurality of recharging wells are arranged on the outer side of the enclosure structure, a plurality of dewatering wells and water level observation wells are arranged in the foundation pit, the dewatering wells are connected with prefabricated assembly type drainage ditches through drainage pipes, the prefabricated assembly type drainage ditches are arranged on the outer side of the enclosure structure, and the prefabricated assembly type drainage ditches are connected with the sedimentation tank. The utility model has the advantages that: a recharging well is arranged, and tap water can be used for pressurizing and recharging to reduce ground settlement; the prefabricated drainage ditch has a simple structure and is convenient to install; a shaped sewage intercepting groove structure is arranged in the prefabricated drainage ditch, so that the phenomenon of pipeline blockage is reduced; the guide support can be used for positioning and adjusting the dewatering well casing; the steel cover plate and the sealing steel plate are used for plugging the dewatering well and the water level observation well, and leakage of a foundation pit bottom plate is reduced.
Description
Technical Field
The utility model relates to a civil engineering field especially includes an ultra-deep foundation ditch controllability precipitation system.
Background
Along with the expansion of the development scale of urban underground space, high-rise buildings, subways and high-speed railways are rapidly developed, more and more underground facilities are continuously emerged, super-large and super-deep foundation pit projects are more and more, and part of super-deep foundation pits can appear in a water-rich sandy gravel stratum. The underground water treatment problem of the ultra-deep foundation pit dug in the water-rich sandy gravel stratum area is solved, for example, the bearing capacity of the foundation is reduced due to the fact that a large amount of underground water is pumped and drained, and the stability of surrounding buildings is threatened; how to control the underground water and reduce the negative influence of the underground water on the excavation of the ultra-deep foundation pit and the construction of a supporting structure becomes an important and difficult-to-treat construction link in the ultra-deep foundation pit construction of the water-rich sandy gravel stratum.
Therefore, a new system for controlling the groundwater of the ultra-deep foundation pit is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide an ultra-deep foundation ditch controllability precipitation system.
This kind of ultra-deep foundation ditch controllability precipitation system includes: the system comprises an enclosure structure, a dewatering well, a water level observation well, a recharge well, a drainage pipeline, a prefabricated assembly type drainage ditch and a sedimentation tank; the building enclosure is arranged on the outer side of the foundation pit, a plurality of recharging wells are arranged on the outer side of the building enclosure, a plurality of dewatering wells and water level observation wells are arranged in the foundation pit, the dewatering wells are connected with prefabricated assembly type drainage ditches through drainage pipelines, the prefabricated assembly type drainage ditches are arranged on the outer side of the building enclosure, and the prefabricated assembly type drainage ditches are connected with the sedimentation tank; the upper parts of the dewatering well and the recharge well are provided with steel anchor ears;
the upper part in the prefabricated assembly type drainage ditch is provided with a main cross rod, a shaped sewage intercepting groove is arranged below the main cross rod through a top supporting cross beam, the bottom of the shaped sewage intercepting groove is provided with a steel wire mesh, and the top of the prefabricated assembly type drainage ditch is provided with a prefabricated cover plate;
the top of the recharging well is connected with a steel cover plate, and the upper part of the steel cover plate is connected with a water supply device through a grouting pipe;
after the foundation pit is excavated, a sealing steel plate is arranged at the top of the water level observation well; the top of the dewatering well is connected with a steel cover plate, and the steel cover plate is connected with a grouting pipe.
Preferably, the method comprises the following steps: the device also comprises a guide support for directionally installing the dewatering well pipe, wherein the lower part of the guide support is connected with a soil body through a bottom cross beam, a horizontal base plate is arranged at the upper part of the bottom cross beam, the dewatering well pipe is fixedly placed above the horizontal base plate through a steel hoop, top cross beams are arranged at the periphery of the dewatering well pipe at the upper part of the guide support through vertical stand columns, and each top cross beam is provided with an adjusting screw rod.
Preferably, the method comprises the following steps: the top of the recharging well is connected with a steel cover plate through a steel hoop and a bolt, a grouting pipe is arranged above the steel cover plate through a flange plate, and the grouting pipe is connected with a ball valve.
Preferably, the method comprises the following steps: after the foundation ditch excavation was accomplished, water level observation well top was equipped with sealing steel plate through clamping screw and rubber pad, and sealing steel plate upper portion is equipped with the bed course, and the waterproof layer has been laid on bed course upper portion, and waterproof layer upper portion is equipped with the water proof coating, and the water proof coating top is equipped with the bottom plate.
Preferably, the method comprises the following steps: after the foundation pit excavation is completed, the top of the dewatering well is connected with a steel cover plate through a steel hoop and a bolt, a grouting pipe is installed above the steel cover plate through a flange plate, the grouting pipe is connected with a ball valve, and double-liquid slurry is injected into the dewatering well.
Preferably, the method comprises the following steps: when the dewatering well is in a grouting finished state, the steel cover plate at the upper part of the dewatering well is not connected with a grouting pipe but connected with a sealing steel plate, and a water stopping steel ring is welded at the lower side of the steel hoop at the upper part of the dewatering well; a cushion layer, a waterproof protective layer and a bottom plate are sequentially arranged above a soil body at the middle height of the dewatering well, a post-pouring sealing body is arranged inside the bottom plate, and the top of the dewatering well is wrapped by the post-pouring sealing body.
Preferably, the method comprises the following steps: the prefabricated assembled drainage ditch still includes prefabricated bottom plate and prefabricated lateral wall, is equipped with the drainage hole on the wire net, and the drainage pipe of connecting each precipitation well assembles to several drain pipes, and prefabricated assembled drainage ditch is connected to the exit end of drain pipe, and the export of drain pipe is in the regularization and cuts dirty groove top.
The utility model has the advantages that:
1) The utility model discloses be equipped with the recharging well, can adopt the running water to pressurize the recharging well and recharge, improve the peripheral ground environment overall stability of foundation ditch, reduce ground subside.
2) The prefabricated drainage ditch is simple in structure and convenient to install; and a regularization sewage intercepting groove structure is arranged in the prefabricated drainage ditch, so that the phenomenon of pipeline blockage is reduced.
3) The guide support is arranged, so that the positioning adjustment of the dewatering well casing can be performed, and the positioning accuracy of the dewatering well casing is improved.
4) The dewatering well and the water level observation well are plugged through the steel cover plate and the sealing steel plate, and the dewatering well is injected with the double-liquid slurry, so that the water leakage phenomenon of the foundation pit bottom plate can be effectively reduced.
Drawings
FIG. 1 is a structural diagram of a controlled precipitation system of an ultra-deep foundation pit;
FIG. 2 is a construction view of the installation of the dewatering well casing;
FIG. 3 is a view of a construction of a controlled pressure recharge;
FIG. 4 is a block diagram of a water level observation well;
FIG. 5 is a structure diagram of a grouting closed structure of a dewatering well;
FIG. 6 is a plugging structure diagram of dewatering well;
fig. 7 is a view showing a structure of a prefabricated drain.
In the figure: 1, a foundation pit; 2, a drainage pipeline; 3, enclosing a structure; 4, dewatering the well; 5, forming a sewage intercepting tank; 6, a sedimentation tank; 7, prefabricating a cover plate; 8, recharging the well; 9, a water level observation well; 10, prefabricating an assembled drainage ditch; 11, soil mass; 12, steel hoops; 13, a guide bracket; 14, a top beam; 15, dewatering well casing; 16, adjusting a screw rod; 17, vertical columns; 18, a horizontal pad; 19, a bottom cross beam; 20, water; 21, a ball valve; 22, a grouting pipe; 23, a flange plate; 24, a steel cover plate; 25, a rubber pad; 26, a bolt; 27, fixing the screw rod; 28, sealing the steel plate; 29, a waterproof layer; 30, a bottom plate; 31, a waterproof protective layer; 32, a cushion layer; 33, double-liquid slurry; 34, post-casting the closed body; 35, a water stop steel ring; 36, a main crossbar; 37, a boom; 38, steel wire mesh; 39, prefabricating a side wall; 40, prefabricating a bottom plate; 41, water filtering holes; 42, a drain pipe; and 43, a top supporting beam.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, the present invention can be modified in several ways without departing from the principle of the present invention, and these modifications and modifications also fall into the protection scope of the claims of the present invention.
As an example, as shown in fig. 1 to 7, an ultra-deep foundation pit controlled precipitation system includes: the system comprises an enclosure structure 3, a dewatering well 4, a water level observation well 9, a recharge well 8, a drainage pipeline 2, a prefabricated assembly type drainage ditch 10 and a sedimentation tank 6; the building enclosure 3 is arranged on the outer side of the foundation pit 1, a plurality of recharging wells 8 are arranged on the outer side of the building enclosure 3, a plurality of dewatering wells 4 and water level observation wells 9 are arranged in the foundation pit 1, the dewatering wells 4 are connected with prefabricated assembly type drainage ditches 10 through drainage pipes 2, the prefabricated assembly type drainage ditches 10 are arranged on the outer side of the building enclosure 3, and the prefabricated assembly type drainage ditches 10 are connected with the sedimentation tank 6; the upper parts of the dewatering well 4 and the recharge well 8 are both provided with steel anchor ears 12;
as shown in fig. 2, there is also a guide support 13 for installing the dewatering well casing 15 of the dewatering well 4 in an oriented manner, the lower part of the guide support 13 is connected with the soil 11 through a bottom beam 19, a horizontal base plate 18 is arranged on the upper part of the bottom beam 19, the dewatering well casing 15 is fixedly placed above the horizontal base plate 18 through a steel hoop 12, top beams 14 are arranged on the upper part of the guide support 13 around the dewatering well casing 15 through vertical columns 17, each top beam 14 is provided with an adjusting screw 16, and the installation position of the upper dewatering well casing 15 is adjusted through the adjusting screw 16.
As shown in fig. 7, a main cross bar 36 is arranged at the upper part in the prefabricated drainage ditch 10, a shaped sewage intercepting tank 5 is arranged below the main cross bar 36 through a top supporting cross beam 43, and a steel wire mesh 38 is arranged at the bottom of the shaped sewage intercepting tank 5; the steel wire mesh 38 is provided with water filtering holes 41, the water drainage pipelines 2 connected with the dewatering wells 4 are converged to a plurality of water drainage pipes 42, the outlet ends of the water drainage pipes 42 are connected to the prefabricated side walls 39 of the prefabricated assembly type drainage ditches 10, the outlets of the water drainage pipes 42 are arranged above the finalized sewage interception tank 5, and the steel wire mesh 38 is used for filtering water 20 discharged by the water drainage pipes 42. The prefabricated drain 10 further includes a prefabricated cover plate 7 and a prefabricated base plate 40.
As shown in fig. 3, the top of the recharging well 8 is connected with a steel cover plate 24 through a steel hoop 12 and a bolt 26, a grouting pipe 22 is arranged above the steel cover plate 24 on the top of the recharging well 8 through a flange plate 23, the grouting pipe 22 is connected with a water supply device, and the grouting pipe 22 is connected with a ball valve 21; the method is used for solving the problem that the precipitation ground settlement is overlarge during drainage, and tap water is used for pressurizing and recharging the recharging well 8.
Firstly, precipitation is finished through the precipitation well 4, and water 20 in the precipitation well 4 flows into the prefabricated assembly type drainage ditch 10 through the drainage pipeline 2 and the drainage pipe 42 and then flows into the sedimentation tank 6; during the period, the backflow well 8 assists in carrying out anti-sedimentation treatment; and after the dewatering is finished, excavating the foundation pit 1.
As shown in fig. 4, after the excavation of the foundation pit 1 is completed, a sealing steel plate 28 is arranged at the top of the water level observation well 9 through a fixing screw 27 and a rubber pad 25, a cushion layer 32 is arranged on the upper portion of the sealing steel plate 28, a waterproof layer 29 is laid on the upper portion of the cushion layer 32, a waterproof protective layer 31 is arranged on the upper portion of the waterproof layer 29, and a bottom plate 30 is arranged above the waterproof protective layer 31.
As shown in fig. 5, after the foundation pit 1 is excavated, the top of the dewatering well 4 is connected with a steel cover plate 24 through a steel hoop 12 and a bolt 26, a grouting pipe 22 is installed above the steel cover plate 24 through a flange plate 23, the grouting pipe 22 is connected with a ball valve 21, and the dewatering well 4 is injected with a double-liquid slurry 33;
as shown in fig. 6, when the dewatering well 4 is in the grouting completion state, the steel cover plate 24 on the upper part of the dewatering well 4 is not connected with the grouting pipe 22 but connected with the sealing steel plate 28, and the water stop steel ring 35 is welded on the lower side of the steel hoop 12 on the upper part of the dewatering well 4; a cushion layer 32, a waterproof layer 29, a waterproof protective layer 31 and a bottom plate 30 are sequentially arranged above a soil body 11 at the middle height of the dewatering well 4, a post-pouring sealing body 34 poured by a reinforced concrete structure is arranged in the bottom plate 30, and the top of the dewatering well 4 is wrapped by the post-pouring sealing body 34.
Claims (7)
1. The utility model provides an ultra-deep foundation ditch controllability precipitation system which characterized in that includes: the system comprises a building enclosure (3), a dewatering well (4), a water level observation well (9), a recharge well (8), a drainage pipeline (2), a prefabricated assembly type drainage ditch (10) and a sedimentation tank (6); the building enclosure (3) is arranged on the outer side of the foundation pit (1), a plurality of recharging wells (8) are arranged on the outer side of the building enclosure (3), a plurality of dewatering wells (4) and water level observation wells (9) are arranged in the foundation pit (1), the dewatering wells (4) are connected with prefabricated assembly type drainage ditches (10) through drainage pipes (2), the prefabricated assembly type drainage ditches (10) are arranged on the outer side of the building enclosure (3), and the prefabricated assembly type drainage ditches (10) are connected with the sedimentation tank (6); the upper parts of the dewatering well (4) and the recharge well (8) are provided with steel anchor ears (12);
a main cross rod (36) is arranged at the upper part in the prefabricated assembly type drainage ditch (10), a shaped sewage intercepting groove (5) is arranged below the main cross rod (36) through a top supporting cross beam (43), a steel wire mesh (38) is arranged at the bottom of the shaped sewage intercepting groove (5), and a prefabricated cover plate (7) is arranged at the top of the prefabricated assembly type drainage ditch (10);
the top of the recharging well (8) is connected with a steel cover plate (24), and the upper part of the steel cover plate (24) is connected with a water supply device through a grouting pipe (22);
after the foundation pit (1) is excavated, a sealing steel plate (28) is arranged at the top of the water level observation well (9); the top of the dewatering well (4) is connected with a steel cover plate (24), and the steel cover plate (24) is connected with a grouting pipe (22).
2. The ultra-deep foundation pit controlled precipitation system of claim 1, wherein: the well casing structure is characterized in that a guide support (13) for directional installation of a dewatering well casing (15) is further provided, the lower portion of the guide support (13) is connected with a soil body (11) through a bottom cross beam (19), a horizontal base plate (18) is arranged on the upper portion of the bottom cross beam (19), the dewatering well casing (15) is fixedly placed above the horizontal base plate (18) through a steel hoop (12), top cross beams (14) are arranged on the upper portion of the guide support (13) around the dewatering well casing (15) through vertical columns (17), and adjusting screws (16) are arranged on each top cross beam (14).
3. The ultra-deep foundation pit controllability precipitation system of claim 1, wherein: the top of the recharging well (8) is connected with a steel cover plate (24) through a steel hoop (12) and a bolt (26), a grouting pipe (22) is arranged above the steel cover plate (24) through a flange plate (23), and the grouting pipe (22) is connected with a ball valve (21).
4. The ultra-deep foundation pit controlled precipitation system of claim 1, wherein: after excavation of the foundation pit (1) is completed, a sealing steel plate (28) is arranged at the top of the water level observation well (9) through a fixing screw rod (27) and a rubber pad (25), a cushion layer (32) is arranged on the upper portion of the sealing steel plate (28), a waterproof layer (29) is laid on the upper portion of the cushion layer (32), a waterproof protective layer (31) is arranged on the upper portion of the waterproof layer (29), and a bottom plate (30) is arranged above the waterproof protective layer (31).
5. The ultra-deep foundation pit controllability precipitation system of claim 1, wherein: after foundation pit (1) excavation is accomplished, precipitation well (4) top is connected with steel cover plate (24) through steel staple bolt (12) and bolt (26), and slip casting pipe (22) are installed through ring flange (23) in steel cover plate (24) top, and slip casting pipe (22) are connected with ball valve (21), and precipitation well (4) is annotated and is had two liquid thick liquids (33).
6. The ultra-deep foundation pit controlled precipitation system of claim 5, wherein: when the dewatering well (4) is in a grouting finished state, the steel cover plate (24) at the upper part of the dewatering well (4) is not connected with the grouting pipe (22) but connected with the sealing steel plate (28), and a water stopping steel ring (35) is welded at the lower side of the steel hoop (12) at the upper part of the dewatering well (4); a cushion layer (32), a waterproof layer (29), a waterproof protective layer (31) and a bottom plate (30) are sequentially arranged above a soil body (11) at the middle height of the dewatering well (4), a post-pouring sealing body (34) is arranged inside the bottom plate (30), and the top of the dewatering well (4) is wrapped by the post-pouring sealing body (34).
7. The ultra-deep foundation pit controlled precipitation system of claim 1, wherein: prefabricated assembled escape canal (10) still include prefabricated bottom plate (40) and prefabricated lateral wall (39), are equipped with drainage hole (41) on wire net (38), and drainage pipe (2) of connecting each precipitation well (4) assemble to several drain pipes (42), and prefabricated assembled escape canal (10) are connected to the exit end of drain pipe (42), and the export of drain pipe (42) is in regularization cut dirty groove (5) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223121180.8U CN218757559U (en) | 2022-11-23 | 2022-11-23 | Controlled precipitation system for ultra-deep foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223121180.8U CN218757559U (en) | 2022-11-23 | 2022-11-23 | Controlled precipitation system for ultra-deep foundation pit |
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| Publication Number | Publication Date |
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| CN218757559U true CN218757559U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223121180.8U Active CN218757559U (en) | 2022-11-23 | 2022-11-23 | Controlled precipitation system for ultra-deep foundation pit |
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| CN (1) | CN218757559U (en) |
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- 2022-11-23 CN CN202223121180.8U patent/CN218757559U/en active Active
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