CN215594079U

CN215594079U - Prevent precipitation structure of basement come-up during construction

Info

Publication number: CN215594079U
Application number: CN202121689001.3U
Authority: CN
Inventors: 吕礼春
Original assignee: Xincheng Holding Group Industrial Development Co ltd
Current assignee: Xincheng Holding Group Industrial Development Co ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-01-21
Anticipated expiration: 2031-07-23

Abstract

A precipitation structure for preventing the basement from floating upwards during construction; comprises a water drain pipe, a water stop plate and a gravel filter layer; the drain pipe is arranged at the bottom of the water collecting well, and the lower end of the drain pipe extends into a soil body below the cushion layer; drainage channels are arranged on the side wall of the drainage pipe and the part in the soil body at intervals; an expanded concrete core is filled in the pipeline of the water drain pipe, and the top surface of the expanded concrete core is lower than the top end of the water drain pipe; a plugging plate is arranged in the water drain pipe and positioned on the top surface of the expanded concrete core; the drain pipe above the plugging plate is filled with sealing paste; the water stop plate is annular and is welded on the outer side wall of the water drain pipe; the gravel filter layer is filled around the water drain pipe, and the top surface of the gravel filter layer is flush with the bottom surface of the cushion layer; the outer side of the gravel filtering layer is wrapped with geotextile. The utility model solves the technical problems that the traditional construction process of the floor reserved dewatering pipe well is complex, the leakage is easy to occur in the later period, and the dewatering well is damaged or stops running during the construction of the basement main body structure.

Description

Prevent precipitation structure of basement come-up during construction

Technical Field

The utility model belongs to the technical field of construction of constructional engineering, and particularly relates to a precipitation structure for preventing a basement from floating upwards during construction.

Background

With the development speed of real estate projects being increased, accidents such as basement floating, bottom plate punching damage and the like caused by underground water problems during construction are frequent, and the accidents are usually caused by the following reasons: 1. the precipitation well is damaged due to construction reasons, and precipitation cannot be carried out; 2. after the post-pouring belt is closed and the foundation pit fertilizer groove is backfilled, no precipitation measure is provided, meanwhile, the top plate of the garage is not covered with soil, and the garage structure is insufficient in anti-floating; 3. the value of the anti-floating water level is wrong, and the actual water level exceeds the anti-floating design water level.

The conventional floor reservation precipitation well has the construction process complicacy, the later stage easily takes place seepage scheduling problem at present, simultaneously because the management problem, the foundation ditch stage precipitation well is often damaged or the bring to rest during basement major structure construction.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a precipitation structure for preventing a basement from floating upwards during construction, and aims to solve the technical problems that the traditional construction process of a bottom plate reserved precipitation pipe well is complex, leakage is easy to occur in the later period, and the precipitation well is damaged or stops running during the construction of a basement main body structure.

In order to achieve the purpose, the utility model adopts the following technical scheme.

A precipitation structure for preventing a basement from floating upwards during construction is used for reducing the underground water level below a foundation slab; a water collecting well is arranged in the foundation bottom plate, and a cushion layer is arranged at the bottom of the foundation bottom plate; the precipitation structure comprises a water drain pipe, a water stop plate and a gravel filter layer; the drain pipe is arranged at the bottom of the water collecting well, and the lower end of the drain pipe extends into a soil body below the cushion layer; drainage channels are arranged on the side wall of the drainage pipe and the part in the soil body at intervals; the drainage channels are arranged on the side wall of the drainage pipe in a quincunx shape, and the distance between every two adjacent drainage channels is 30-35 mm; the water drainage pore passage is an inclined pore passage and is gradually inclined upwards from outside to inside on the side wall of the water drainage pipe; the pipeline of the water drain pipe is filled with an expanded concrete core, and the top surface of the expanded concrete core is lower than the top end of the water drain pipe; a plugging plate is arranged in the pipeline of the water drain pipe and positioned on the top surface of the expanded concrete core; sealing paste is filled in the drain pipe above the blocking plate; the water stop plate is annular and is welded on the outer side wall of the water drain pipe; the gravel filter layer is filled around the drain pipe, and the top surface of the gravel filter layer is flush with the bottom surface of the cushion layer; the outer side of the gravel filtering layer is wrapped with geotextile.

Preferably, the pipe diameter of the water drain pipe is not less than 100mm, and the length of the lower end of the water drain pipe extending into the soil body below the cushion layer is not less than 600 mm.

Preferably, the plugging plates are connected with the water drain pipe in a welding mode, and the distance between the top ends of the plugging plates ranges from 50mm to 100 mm.

Preferably, the width of the water stop plate is not less than 100mm, and the distance between the water stop plate and the bottom of the water collecting well is 1/2 base plate thickness; the distance between the water stop plate and the cushion layer is 1/2 the thickness of the base bottom plate.

Preferably, the difference between the outer diameter and the inner diameter of the gravel filter layer is not less than 200 mm.

Compared with the prior art, the utility model has the following characteristics and beneficial effects.

1. The dewatering structure is simple in construction, the water drain pipe is directly embedded in the foundation slab structure, and maintenance is not needed; the precipitation structure leads water at the bottom of the foundation into the basement sump pit, so that the anti-floating effect is direct and effective, the cost is low, and no leakage risk exists after plugging; the device can effectively avoid the problem of anti-floating damage of the basement during construction.

2. The filter layer is composed of geotechnical cloth wrapped with graded broken stones with the diameter of 10 mm-50 mm and is placed in soil on the outer side of the water drain pipe; the steel plate is sealed, and when the water drain pipe is sealed, a steel plate and steel pipe welding method is adopted after the core is filled with the expanded concrete, so that the water-resisting effect is ensured; the factice is fully embedded, and the factice is fully embedded above the closed steel plate, so that the steel plate is prevented from rusting, and water seepage is isolated.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a precipitation structure in the present invention.

FIG. 2 is a schematic view showing the structure of a downcomer according to the present invention.

FIG. 3 is a schematic view of a horizontal sectional structure of a drainage pipe arranged in a gravel filtering layer according to the present invention.

Reference numerals: 1-a water drain pipe, 2-a water stop plate, 3-a gravel filter layer, 4-an expanded concrete core, 5-sealant, 6-a plugging plate, 7-a foundation slab, 8-a water collecting well, 9-a cushion layer, 10-a water drain hole and 11-geotextile.

Detailed Description

As shown in fig. 1-3, such precipitation structures to prevent the basement from floating up during construction, are used to lower the groundwater level below the foundation bed 7; a water collecting well 8 is arranged in the foundation bottom plate 7, and a cushion layer 9 is arranged at the bottom of the foundation bottom plate 7; the precipitation structure comprises a water drain pipe 1, a water stop plate 2 and a gravel filter layer 3; the drain pipe 1 is arranged at the bottom of the water collecting well 8, and the lower end of the drain pipe 1 extends into a soil body below the cushion layer 9; drainage channels 10 are arranged on the side wall of the drainage pipe 1 and the part in the soil body at intervals; the drainage channels 10 are arranged on the side wall of the drainage pipe 1 in a quincunx shape, and the distance between every two adjacent drainage channels 10 is 30-35 mm; the water drainage pore passage 10 is an inclined pore passage and is gradually inclined upwards from outside to inside on the side wall of the water drainage pipe 1; the interior of the water drain pipe 1 is filled with an expanded concrete core 4, and the top surface of the expanded concrete core 4 is lower than the top end of the water drain pipe 1; a plugging plate 6 is arranged in the pipeline of the water drain pipe 1 and positioned on the top surface of the expanded concrete core 4; the sealing paste 5 is filled in the drain pipe 1 above the blocking plate 6; the water stop plate 2 is annular and is welded on the outer side wall of the water drain pipe 1; the gravel filter layer 3 is filled around the drain pipe 1, and the top surface of the gravel filter layer 3 is flush with the bottom surface of the cushion layer 9; the outside of the gravel filter layer 3 is wrapped with geotextile 11.

In this embodiment, the pipe diameter of the drain pipe 1 is not less than 100mm, and the length of the lower end of the drain pipe 1 extending into the soil below the cushion layer 9 is not less than 600 mm.

In this embodiment, welded connection between shutoff board 6 and the outlet pipe 1, the interval between 6 tops of shutoff board is 50mm ~100 mm.

In this embodiment, the width of the water stop plate 2 is not less than 100mm, the distance between the water stop plate 2 and the bottom of the water collecting well 8 is 1/2 the thickness of the foundation slab 7, and the distance between the water stop plate 2 and the cushion layer 9 is 1/2 the thickness of the foundation slab 7.

In this embodiment, the difference between the outer diameter and the inner diameter of the gravel filter layer 3 is not less than 200 mm.

In this embodiment, the diameter of graded rubble in rubble filter layer 3 is 10mm ~50mm, and the thickness of rubble filter layer 3 is 600mm, and the diameter is 500 mm.

The construction method of the precipitation structure comprises the following steps.

The method comprises the following steps: manufacturing a macadam filter layer 3: the geotextile 11 is used for wrapping graded broken stones with the diameter of 10 mm-50 mm to serve as broken stone filtering layers 3, the height is not less than 600mm, and the diameter is not less than 500 mm.

Step two, embedding the gravel filter layer 3: and wrapping the geotextile 11 with the gravel filter layer 3, and pre-embedding the geotextile into a soil body before pouring the cushion layer 9.

Step three, pre-burying of the water drain pipe 1: the water drain pipe 1 is inserted into the gravel filter layer 3 and fixed.

And step four, pouring concrete of the cushion layer 9 and concrete of the foundation slab 7.

Step five, draining and decompressing: during construction, the underground water is discharged through the drain pipe 1 and pumped out, and the elevation of the underground water level is reduced.

Step six: plugging the drain pipe 1: after the basement roof earthing is accomplished, the outlet pipe 1 is blocked with the expanded concrete core 4 to adopt shutoff board 6 and outlet pipe 1 welding, guarantee the water proof effect.

And step seven, embedding sealing paste 5 above the plugging plate 6 until the construction is finished.

In this embodiment, before the step three, the drain pipe 1 is pre-buried, the manufacturing of the drain pipe 1 is performed: taking a galvanized steel pipe with the diameter not less than 100mm, wherein the length of the water filtering section is not less than 600mm, and carrying out quincunx hole forming on the water filtering section, wherein the hole diameter is 10mm, and the hole center distance is 30-35 mm; and welding a water stop plate 2 with the thickness of 3mm and the width of not less than 100mm on the steel pipe.

The above embodiments are not intended to be exhaustive or to limit the utility model to other embodiments, and the above embodiments are intended to illustrate the utility model and not to limit the scope of the utility model, and all applications that can be modified from the utility model are within the scope of the utility model.

Claims

1. A precipitation structure for preventing a basement from floating upwards during construction is used for reducing the underground water level below a foundation bottom plate (7) and preventing the foundation bottom plate (7) from floating upwards; a cushion layer (9) is arranged at the bottom of the foundation slab (7); the method is characterized in that: a water collecting well (8) is arranged in the foundation bottom plate (7); the precipitation structure comprises a water drain pipe (1), a water stop plate (2) and a gravel filter layer (3); the drain pipe (1) is arranged at the bottom of the water collecting well (8), and the lower end of the drain pipe (1) extends into a soil body below the cushion layer (9); drainage channels (10) are arranged on the side wall of the drainage pipe (1) and the part of the drainage pipe in the soil body at intervals; the drainage channels (10) are arranged on the side wall of the drainage pipe (1) in a quincunx shape, and the distance between every two adjacent drainage channels (10) is 30-35 mm; the water drainage pore passage (10) is an inclined pore passage and is gradually inclined upwards from outside to inside on the side wall of the water drainage pipe (1); the pipeline of the water drain pipe (1) is filled with an expanded concrete core (4), and the top surface of the expanded concrete core (4) is lower than the top end of the water drain pipe (1); a plugging plate (6) is arranged in the pipeline of the water drain pipe (1) and positioned on the top surface of the expanded concrete core (4); the sealing paste (5) is filled in the drain pipe (1) above the blocking plate (6); the water stop plate (2) is annular and is welded on the outer side wall of the water drain pipe (1); the gravel filtering layer (3) is filled around the drain pipe (1), and the top surface of the gravel filtering layer (3) is flush with the bottom surface of the cushion layer (9); the outer side of the gravel filter layer (3) is wrapped with geotextile (11).

2. The precipitation structure for preventing floating up of a basement during construction according to claim 1, wherein: the pipe diameter of the drain pipe (1) is not less than 100mm, and the length of the lower end of the drain pipe (1) extending into the soil body below the cushion layer (9) is not less than 600 mm.

3. The precipitation structure for preventing floating up of a basement during construction according to claim 1, wherein: the plugging plate (6) is connected with the drain pipe (1) in a welding mode, and the distance between the top ends of the plugging plates (6) ranges from 50mm to 100 mm.

4. The precipitation structure for preventing floating up of a basement during construction according to claim 1, wherein: the width of the water stop plate (2) is not less than 100mm, and the distance between the water stop plate (2) and the bottom of the water collecting well (8) is 1/2 of the thickness of the foundation bottom plate (7); the distance between the water stop plate (2) and the cushion layer (9) is 1/2 the thickness of the foundation bottom plate (7).

5. The precipitation structure for preventing floating up of a basement during construction according to claim 1, wherein: the difference between the outer diameter and the inner diameter of the gravel filtering layer (3) is not less than 200 mm.