CN217840065U

CN217840065U - Deep and large foundation pit dewatering device

Info

Publication number: CN217840065U
Application number: CN202221575258.0U
Authority: CN
Inventors: 林万福; 陈昆明; 郑国森; 黄佐明
Original assignee: Fujian Lugang Group Co ltd
Current assignee: Fujian Lugang Group Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-11-18
Anticipated expiration: 2032-06-22

Abstract

The utility model relates to a foundation ditch drainage equipment especially relates to a deep and large foundation ditch dewatering device, including header pipe, well point pipe and suction pump, header pipe is the closed loop pipeline of rectangle, the last delivery port and a plurality of water inlet of being provided with of header pipe, the delivery port with the suction pump is connected, the water inlet with well point pipe is connected, well point pipe includes mutually perpendicular's curved even portion and infiltration portion, the infiltration portion is rectangular shape body, infiltration portion includes cast iron head, firm portion, filter house, thick iron wire protection network portion in proper order on its axis direction, the intensive a plurality of through-holes that are provided with in firm portion have solved electric element direct and water contact among the current foundation ditch dewatering device, have the technical problem of potential safety hazard.

Description

Deep and large foundation pit dewatering device

Technical Field

The utility model relates to a foundation ditch drainage equipment field especially relates to a deep and large foundation ditch precipitation device.

Background

The deep foundation pit refers to a project with an excavation depth of more than 5 meters (including 5 meters), or with a depth of less than 5 meters, but with particularly complex geological conditions, surrounding environment and underground pipelines.

The foundation pit dewatering refers to dewatering work performed for ensuring that the foundation pit can be constructed under a dry condition and preventing slope instability, foundation quicksand, pit bottom uplift, pit bottom piping and foundation bearing capacity reduction when the underground water level is higher than the excavation bottom surface when the foundation pit is excavated.

The foundation pit dewatering method mainly comprises the following steps: open ditch with water collecting well dewatering, light well point dewatering, jet well point dewatering, electroosmosis well point dewatering, deep well point dewatering, etc.

The invention patent with Chinese patent application number of 202010721826.2 discloses a foundation pit dewatering system, which comprises a soft soil foundation, a reclamation area and a sludge area, wherein a circle of pile foundation is arranged at the periphery of the reclamation area, a vacuum pump and a direct-current power supply are arranged on one side of the reclamation area, a vertical drain pipe connected with the vacuum pump is arranged on one side in the reclamation area, multiple layers of transverse drain pipes are arranged on the vertical drain pipe, the other ends of the transverse drain pipes are inserted into the soft soil foundation on the other side of the reclamation area, a plurality of conductive drain plates are arranged on the transverse drain pipes, an electroosmosis anode is arranged on the transverse drain pipe on the uppermost layer, electroosmosis electrodes arranged on each downward layer of transverse drain pipes are opposite to electroosmosis electrodes arranged on the upper layer of transverse drain pipes, the electrodes of the conductive drain plates are connected with electroosmosis electrodes corresponding to the transverse drain pipes through leads, the leads and the conductive drain plates form a whole body capable of draining and conducting water, and the electroosmosis electrodes of the transverse drain pipes are connected with the direct-current power supply through leads. This foundation ditch precipitation system can carry out quick precipitation, accelerate to enclose and cultivate speed, improve ground treatment effeciency, strengthen having fastened pile foundation intensity to the foundation ditch. However, the technical scheme provided by the invention has a complex structure, the electric element is contacted with water, and the electroosmosis electrode has potential safety hazards in the water environment.

SUMMERY OF THE UTILITY MODEL

Therefore, to foretell problem, the utility model provides a deep and large foundation ditch precipitation device has solved among the current foundation ditch precipitation device electric element direct and water contact, has the technical problem of potential safety hazard.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a deep and large foundation pit dewatering device, includes collecting main, well point pipe and suction pump, collecting main is the closed loop pipeline of rectangle, collecting main is last to be provided with a delivery port and a plurality of water inlet, the delivery port with the suction pump is connected, the water inlet with well point pipe is connected, well point pipe includes mutually perpendicular's curved even portion and infiltration portion, the infiltration portion is rectangular shape body, infiltration portion includes cast iron head, firm portion, filter house, thick iron wire protection net portion in proper order on its axis direction, the intensive a plurality of through-holes that are provided with in firm portion.

Furthermore, the outer surface of the water collecting main pipe is coated with a flexible layer for providing buffering and shock absorption.

Further, the length of the infiltration part along the axial direction is 1000mm-2000mm.

Further, the cast iron head is in an inverted cone shape, and the cast iron head and the stabilizing part are integrally formed.

Further, the pipe diameter of the water collecting main pipe is 30cm-60cm, and the pipe diameter of the well point pipe is one third to one half of the pipe diameter of the water collecting main pipe.

Furthermore, a coarse filter screen and a fine filter screen are arranged in the filter part, the mesh diameter of the coarse filter screen is 5-10mm, and the mesh diameter of the fine filter screen is 1.5-3mm.

By adopting the technical scheme, the beneficial effects of the utility model are that:

1. the overall working efficiency of the device is improved by improving the existing light well point dewatering device; if the well point pipe comprises a bent connecting part and an infiltration part, the bent connecting part is arranged to enable the water collecting main pipe to be far away from the foundation pit, the foundation pit is prevented from sinking and affecting the device, water is pumped into the water collecting main pipe through the infiltration part which goes deep into the ground, and then water in the water collecting main pipe is pumped out by the water pump, so that the underground water level is reduced, the foundation pit excavation construction is facilitated, the infiltration part is a long-strip-shaped pipe body, the resistance of the infiltration part in the process of infiltrating the infiltration part into the ground can be guaranteed to be small, and the infiltration part can conveniently extend into the soil; the infiltration part sequentially comprises a cast iron head, a stabilizing part, a filtering part and a thick iron wire protecting net part along the axial direction of the infiltration part, and a plurality of through holes are densely arranged on the stabilizing part; the cast iron head serving as a pioneer part penetrates through the soil layer and is designed into an inverted cone shape, so that the resistance of drilling is reduced; firm portion is used for providing the support for the cast iron head, avoids it because control to rock and the fracture of buckling, is provided with the through-hole in the firm portion simultaneously, and it is as the main entrance that rivers got into, and the settlement of filter house is because the portion of oozing down oozes to the soil property layer in, and the quality of water of ground bottom mixes there is silt, needs carry out the prefiltration and handles, avoids the rivers that are adulterated with silt or other impurity directly to get into the suction pump, can lead to the suction pump to damage.

2. The cladding has on the surface of collecting main pipe to be used for providing the absorbing flexible layer of buffering, and the purpose that sets up of flexible layer is in order to guarantee reducing the rocking of collecting main pipe self at the in-process of drawing water, avoids water inlet and delivery port because rock the condition that appears leaking.

3. The length of the infiltration part along the axial direction is 1000mm-2000mm, and the dewatering operation of most foundation pits can be met.

4. The pipe diameter of the water collecting main pipe is 30cm-60cm, and the pipe diameter of the well point pipe is one third to one half of the pipe diameter of the water collecting main pipe; the water collecting main pipe is used as a pipeline for collecting water from each well point pipe, and the pipe diameter of the water collecting main pipe needs to meet the requirement of passing of large-flow water flow.

5. The filter part comprises a coarse filter screen and a fine filter screen, the mesh diameter of the coarse filter screen is 5-10mm, and the mesh diameter of the fine filter screen is 1.5-3mm, and the filter part is used for double filtering of water flow doped with silt.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2;

fig. 4 is the construction structure diagram of the utility model.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 4, the embodiment provides a deep and large foundation pit dewatering device, which includes a water collecting main 1, a well point pipe 2 and a water suction pump 3, the water collecting main 1 is a rectangular closed-loop pipeline, a water outlet and a plurality of water inlets are arranged on the water collecting main 1, the water outlet is connected with the water suction pump 3 through a connecting pipeline 4, the water inlet is connected with the well point pipe 2, the water outlet and the water inlet are conventional holes formed in the water collecting main 1 and used for enabling the well point pipe 2 and the water suction pump 3 to be connected into the water collecting main 1, the structure of the water collecting main 1 is not specifically shown in the figure, the well point pipe 2 includes a bending connection portion 21 and an infiltration portion 22 which are perpendicular to each other, the infiltration portion 22 is a strip-shaped pipe body, the infiltration portion 22 includes a cast iron head 223, a stable portion 222, a filtering portion 221 and a thick iron wire protection net portion 224 in sequence along the axial direction of the infiltration portion 22, wherein the cast iron head 223 is farthest away from the bending connection portion 21, the thick iron wire protecting net part 224 is closest to the bending connection part 21, wherein the thick iron wire protecting net part 224 is formed by coating a thick iron wire net on the outer side of the well point pipe 2, the stabilizing part 222 is densely provided with a plurality of through holes 2221, the through holes 2221 are used for enabling water in a soil layer to flow into the infiltration part 22, the length of the infiltration part 22 in the axial direction is 1000mm, the cast iron head 223 is in an inverted cone shape, the cast iron head 223 and the stabilizing part 222 are integrally formed, the cast iron head 223 adopts an inverted cone shape, resistance of the cast iron head can be reduced when the cast iron head is drilled into the soil layer, downward drilling is convenient, the pipe diameter of the water collecting main pipe 1 is 30cm, the pipe diameter of the well point pipe 2 is 15cm, a thick filter net 2212 and a thin filter net 2211 are arranged in the filter part 221, the mesh diameter of the thick filter net 2212 is 5mm, the mesh diameter of the thin filter net 2211 is 1.5mm, the thick filter net 2 is used for filtering soil blocks and impurities with larger volume, the fine filter screen 2211 is used for filtering impurities with small volume and preventing the impurities from entering the water pump 3 to damage the machine;

the cladding has on water collecting main 1's the surface to be used for providing buffering absorbing flexible layer 11, the in-process of the operation of drawing water at the device, because groundwater does not constantly be taken out like normal rivers, its process is intermittent, will lead to rivers impact the pipeline and cause the pipeline to rock, can alleviate the striking of water collecting main 1 and ground through being provided with flexible layer 11, alleviate its self and rock, avoided water collecting main 1 and well point pipe 2 and suction pump 3 to break away from.

The number of the defined water inlets is multiple, the specific number of the water inlets is determined according to the number of the well point pipes 2, the specific number of the well point pipes 2 is determined according to the actual size of the foundation pit and the density of the intervals between the well point pipes 2, and the length of the infiltration part 22 in the axial direction can be any value between 1000mm and 2000mm, such as 1500mm or 2000mm; the diameter of the water collecting main pipe 1 may be any value between 30cm and 60cm, such as 45cm or 60cm, while the diameter of the well point pipe 2 only needs to be one third to one half of the diameter of the water collecting main pipe 1 to meet the matching between the two, the mesh diameter of the coarse filter screen 2212 may be any value between 5mm and 10mm, such as 8mm or 10mm, and similarly, the mesh diameter of the fine filter screen 2212 may be any value between 1.5mm and 3mm, such as 2mm or 3mm.

The utility model discloses the construction mode refers to fig. 4, and wherein an is deep basal pit, and b is the stratum, and the well point pipe 2 bores down and draws water the operation in to stratum b to reduce deep basal pit a soil layer b's groundwater level all around, make things convenient for deep basal pit a to dig the operation down.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a deep and large foundation ditch precipitation device, includes collecting main, well point pipe and suction pump, its characterized in that: the utility model discloses a water collection manifold, including water collection manifold, well point pipe, infiltration portion, cast iron head, firm portion, filter house, thick iron wire protection net portion, the water collection manifold is the closed loop pipeline of rectangle, be provided with a delivery port and a plurality of water inlet on the water collection manifold, the delivery port with the suction pump is connected, the water inlet with the well point pipe is connected, the well point pipe includes mutually perpendicular's curved even portion and infiltration portion, the infiltration portion is rectangular shape body, infiltration portion includes cast iron head, firm portion, filter house, thick iron wire protection net portion in proper order along its axis direction, the intensive a plurality of through-holes that are provided with in the firm portion.

2. The deep and large foundation pit dewatering device of claim 1, wherein: the outer surface of the water collecting main pipe is coated with a flexible layer for providing buffering and shock absorption.

3. The deep and large foundation pit dewatering device of claim 1, wherein: the length of the infiltration part along the axial direction is 1000mm-2000mm.

4. The deep and large foundation pit dewatering device of claim 1, wherein: the cast iron head is in an inverted cone shape, and the cast iron head and the stable part are integrally formed.

5. A deep large foundation pit dewatering apparatus as claimed in any one of claims 1 to 4, wherein: the pipe diameter of the water collecting main pipe is 30cm-60cm, and the pipe diameter of the well point pipe is one third to one half of the pipe diameter of the water collecting main pipe.

6. A deep and large foundation pit dewatering device according to claim 5, characterized in that: a coarse filter screen and a fine filter screen are arranged in the filter part, the mesh diameter of the coarse filter screen is 5-10mm, and the mesh diameter of the fine filter screen is 1.5-3mm.