CN209837065U - Non-penetrating local precipitation construction structure - Google Patents

Abstract

The utility model discloses a local dewatering construction structures of non-penetrating, especially a local dewatering construction structures of non-penetrating who relates to deep basal pit engineering construction field. The utility model discloses a local dewatering construction structures of non-penetrating, including foundation ditch and drain pipe, the foundation ditch bottom is provided with the pit that falls, it is provided with down the water pipe to fall water pit department, be provided with the suction pump in the down the water pipe, drain pipe one end is connected with the suction pump, and the other end extends to the foundation ditch outside, it is provided with the filter material filling layer to fall water pipe and fall between the pit inner wall. The utility model discloses a local precipitation construction structures of non-penetrating, its simple structure can effectively reduce the water level in the precipitation well fast, guarantees construction safety.

Description

Non-penetrating local precipitation construction structure

Technical Field

The utility model relates to a local precipitation construction structures of non-penetrating type, especially a local precipitation construction structures of non-penetrating type who relates to deep basal pit engineering construction field.

Background

With the development of urban high-rise buildings, deep foundation pit engineering is increasing, and the treatment of underground water becomes a key in the construction process. In the areas with high underground water level, large thickness of confined aquifer and abundant water quantity, the depth of the dewatering well is increased because the elevator well and the water collecting well are 2-3m lower than the building foundation during underground engineering construction, so that the dewatering cost is increased. In order to ensure that the construction can be carried out under the dry condition in the foundation pit, foundation pit lowering and drainage measures are made, which is the key for ensuring the engineering quality of the basement. Therefore, the dewatering well can be independently arranged in the elevator shaft and the sump pit, the purpose of dewatering is achieved by pumping water, and a non-penetrating local dewatering construction structure capable of achieving quick dewatering in the dewatering well does not exist in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a simple structure can effectively reduce the water level in the precipitation well fast, guarantees construction safety's local precipitation construction structure of non-penetrating type.

The utility model discloses a solve the local dewatering construction structures of non-penetrating type that above-mentioned problem adopted, including foundation ditch and drain pipe, the foundation ditch bottom is provided with the pit that falls, it is provided with down the water pipe to fall water pit department, be provided with the suction pump in the down water pipe, drain pipe one end is connected with the suction pump, and the other end extends to the foundation ditch outside, it is provided with the filter material filling layer to fall between water pipe and the pit inner wall that falls.

Furthermore, a waterproof coiled material is further arranged in the foundation pit.

Further, a brick mould is arranged between the waterproof coiled material and the inclined wall of the foundation pit.

Further, the downcomer includes steel pipe and stagnant water ring, the mouth of pipe department at the steel pipe top is installed to the stagnant water ring.

Further, the water stop ring protrudes from the pipe wall by 49.5mm to 50.5 mm.

Furthermore, the waterproof coiled material is turned over to the position of the water stop ring from the periphery of the steel pipe.

Further, a cement mortar protective layer is arranged on the outer side of the waterproof roll.

The utility model has the advantages that: this application is put into the downcomer with the suction pump in, draws water the operation, makes the process downcomer in the precipitation well filter the back, passes through outside the drain pipe discharge foundation ditch by the suction pump, makes the foundation ditch internal energy be under the dry condition construction, has effectively guaranteed basement engineering quality. The filter material filling layer that sets up between precipitation pipe and the precipitation pit inner wall can carry out effective filtration to water when the drainage, adopts the characteristics of the local well point precipitation of construction structure utilization of this application, adopts machines, equipment simpler, and easy operation can effectual reduction of erection time.

Drawings

Fig. 1 is a schematic structural diagram of the present application.

Labeled as: the water-saving device comprises a drain pipe 1, a water stop ring 2, a downcomer 3, a brick mould 4, a waterproof coiled material 5, a foundation pit 6 and a filter material filling layer 7.

Detailed Description

As shown in figure 1, the local dewatering construction structures of non-penetrating of this application, including foundation ditch 6 and drain pipe 1, 6 bottoms of foundation ditch are provided with the pit that falls, it is provided with downcomer pipe 3 to fall pit department, be provided with the suction pump in the downcomer pipe 3, 1 one end of drain pipe is connected with the suction pump, and the other end extends to 6 outsides of foundation ditch, it is provided with filter material filling layer 7 to fall between 3 and the pit inner wall of water. This application is put into downcomer 3 with the suction pump, draws water the operation, makes the 3 back of filtering of process downcomer in the precipitation well, passes through drain pipe 1 by the suction pump and discharges outside foundation ditch 6, makes foundation ditch 6 internal energy under the dry condition construction, has effectively guaranteed basement engineering quality. The filter material filling layer 7 that sets up between precipitation pipe 3 and the precipitation pit inner wall can carry out effective filtration to water when the drainage, adopts the characteristics of the local well point precipitation of the construction structures utilization of this application, adopts machines, equipment simpler, and easy operation can effectual reduction of erection time.

In order to effectively avoid the emergence of the condition of seepage and piping, still be provided with waterproofing membrane 5 in this application foundation ditch 6, can effectively avoid water to ooze from foundation ditch 6 to all around, cause the harm to surrounding structure facility.

In order to facilitate the construction of waterproofing membrane 5 on the inclined plane, be provided with brick bed die 4 between waterproofing membrane 5 and the 6 skew walls of foundation ditch.

The downcomer 3 of this application includes steel pipe and seal ring 2, the mouth of pipe department at the steel pipe top is installed to seal ring 2. The water stop ring 2 arranged at the pipe orifice can effectively prevent water leakage and improve the reliability of engineering.

In order to ensure the water stopping effect, the water stopping ring 22 protrudes from the pipe wall by 49.5mm to 50.5 mm. The optimal water stopping effect can be obtained when the water stopping ring 22 protrudes about 50mm from the pipe wall.

After drawing water and accomplishing, thereby in order to prevent 1 department of steel pipe infiltration, waterproofing membrane 5 has still been set up in this application, waterproofing membrane 5 is by steel pipe 1 turn over all around to stagnant water ring 22 position, and waterproofing membrane 5 forms a complete waterproof system with stagnant water ring 22 like this, can further strengthen water-proof effects.

In order to make waterproofing membrane 5 wait to better protection, this application still be in waterproofing membrane 5 outside still is provided with cement mortar protective layer.

The concrete construction steps of the structure are as follows:

one, digging precipitation pit

And on the well position with the positioning and the paying-off, an excavator is used for excavating to 300mm-0.300 below the elevation of the bottom of the designed water accumulation pit, in order to avoid disturbance of mechanical excavation on the periphery of the foundation pit 6, the water falling pit is excavated and cleaned by picking up the bottom manually, and the pit depth is 1500 mm-1.800. After water gushing occurs in the excavation process, a submersible pump is placed in time to pump the gushing water, and open water is prevented from appearing at the bottom of the pit.

Second, manufacturing of precipitation steel pipe

The precipitation steel pipe 1 is prefabricated and processed into a finished product according to the field condition, and is transported to the field for direct installation. Selecting a steel pipe with the length of DN300 multiplied by 5mm being 12m, namely the buried depth being 1.5m, the cushion thickness being 0.3+ the cushion finished surface being 0.2m, drilling holes with the height of 1500mm on the side wall of the steel pipe uniformly, and the aperture being 20 mm; the pipe orifice is provided with a water stop ring 2, and the water stop ring 2 protrudes 50mm from the pipe wall; the bottom of the steel pipe is sealed by a steel plate with the thickness of 500 multiplied by 10 mm; the drilling range is wrapped with a sand screen 4.

Thirdly, the downcomer 3 is installed

After the construction of the precipitation pit is completed, the manufactured precipitation pipe 3 is installed in the precipitation pit, and after the precipitation pipe 3 is lowered, the precipitation pipe 3 is fixed according to the paying-off positioning position.

Fourthly, filling filter materials

And backfilling pebbles with the diameter of 30-50mm around the downcomer 3 to the elevation of the bottom of the cushion layer, and paving a layer of non-woven geotextile.

Fifthly, mounting of water pump

And the water pump is installed and suspended, is arranged at the bottom of the well, is installed and connected with a power supply to realize a single-well single-control circuit, and is used for checking a water level relay braking water pumping device and an electric leakage protection system.

Sixth, water pumping

The water pumping should be continuously carried out for 24 hours without interruption. When the water pump needs to be maintained and replaced, the maintenance and the replacement are carried out one by one. After the water pumping is started, whether the water discharge pipes 1 are flushed or not is checked one by one, and whether a leakage phenomenon exists or not is determined, such as reworking or maintenance is needed for joints or leakage of the water discharge pipes 1. When the sand content is too large, the water pump can be lifted by 500mm, and if the sand content is still large, the dewatering well is cleaned.

During the pumping of the submersible pump, a specially-assigned person should be used for nursing to ensure that the underground water level is about 20mm lower than the cushion layer, and a C15 concrete cushion layer with the thickness of 300mm is poured after the water level is stable.

Seventh, waterproof and foundation steel bar construction

When the waterproof coiled material 5 is constructed, the periphery of the steel pipe 1 is upturned to the position of the water stop ring 22, an additional layer is arranged at a corner, and the width is not less than 500 mm. When the coiled material is turned up to the water stop ring 22, the waterproof coiled material 5 with the width of 500mm is reserved around the coiled material for processing and sealing the pipe for standby. After the waterproof construction is finished, a cement mortar protective layer is coated outside, and reinforcing steel bars 6 are additionally arranged around the steel pipe 1 during the raft construction. The finished surface elevation of the cushion layer at the high position of the steel pipe 1 is 200mm, and the pipe orifice is protected to prevent foreign matters from falling.

Before raft plate concrete begins to be poured, the water suction pump 7 is taken out of the dewatering well after power failure, and impervious expansive concrete which is higher than the raft plates by one mark is poured into the steel pipe 1.

After concrete pouring, the pipe orifice is welded and sealed by adopting a steel plate with the thickness of 10mm, the reserved waterproof coiled material 5 is turned upwards to seal the downcomer 3, and then the foundation concrete is poured in a large area.

Claims (5)

1. Non-penetrating local precipitation construction structures, its characterized in that: the water-saving drainage structure comprises a foundation pit (6) and a drainage pipe (1), wherein a water descending pit is arranged at the bottom of the foundation pit (6), a water descending pipe (3) is arranged at the water descending pit, a water suction pump is arranged in the water descending pipe (3), one end of the drainage pipe (1) is connected with the water suction pump, the other end of the drainage pipe extends to the outside of the foundation pit (6), and a filter material filling layer (7) is arranged between the water descending pipe (3) and the inner wall of the water descending pit; a waterproof coiled material (5) is also arranged in the foundation pit (6); and a brick molding bed (4) is arranged between the waterproof coiled material (5) and the inclined wall of the foundation pit (6).

2. The non-penetrating local precipitation construction structure of claim 1, wherein: the downcomer (3) comprises a steel pipe and a water stop ring (2), and the water stop ring (2) is installed at the pipe orifice at the top of the steel pipe.

3. The non-penetrating local precipitation construction structure of claim 2, wherein: the water stop ring (2) protrudes from the pipe wall by 49.5mm to 50.5 mm.

4. The non-penetrating local precipitation construction structure of claim 2, wherein: and the waterproof coiled material (5) is turned up to the position of the water stop ring (2) from the periphery of the steel pipe.

5. The non-penetrating local precipitation construction structure of claim 4, wherein: and a cement mortar protective layer is also arranged on the outer side of the waterproof roll (5).