CN210288405U

CN210288405U - Local deep pit water conservancy diversion escape canal system

Info

Publication number: CN210288405U
Application number: CN201920553789.1U
Authority: CN
Inventors: 孙鹏鹏; 白小刚; 唐高强; 陈思睿; 宋全
Original assignee: Shanghai Construction No 1 Group Co Ltd
Current assignee: Shanghai Construction No 1 Group Co Ltd
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2020-04-10
Anticipated expiration: 2029-04-22

Abstract

The utility model discloses a local pit water conservancy diversion escape canal system relates to the foundation ditch and falls drainage technical field for solve precipitation foundation ditch area big, and should not set up the problem of the drainage construction that falls of precipitation well in the foundation ditch. The drainage ditch comprises drainage ditches arranged in a foundation pit needing dewatering at reasonable intervals, wherein a water filtering layer, a drainage pipe, gravel and a concrete cushion layer are sequentially arranged in the drainage ditches, and the water filtering layer wraps the outer side of the drainage pipe; the two ends of the drainage ditch are provided with water collecting wells, and submersible pumps are arranged in the water collecting wells and used for pumping and descending underground. Groundwater permeates into a drainage pipe in the drainage ditch through a drainage layer in the drainage ditch, then the groundwater is collected into a water collecting well arranged at the end part of the drainage ditch through the drainage pipe, and a submersible pump is installed on the water collecting well to pump water, so that the requirement of reducing the groundwater is met. The method can meet the requirement of precipitation of different height differences in different areas, and can not pump and reduce excessive underground water, and the engineering cost can be reduced by adopting the precipitation method.

Description

Local deep pit water conservancy diversion escape canal system

Technical Field

The utility model relates to a drainage technical field falls in the foundation ditch, in particular to local pit water conservancy diversion drainage ditch system.

Background

Be equipped with darker and the great foundation ditch of area such as a large amount of elevartors shafts, sump pit in the current high-rise building bottom plate basis, generally deepen 2 ~ 4 meters than the bottom plate, this position is great in the construction degree of difficulty, has a great deal of difficult problems such as foundation ditch precipitation difficulty. If precipitation is improper, the foundation ditch collapses very easily, and the drift sand, phenomenons such as soil body disturbance, slope shape can't be guaranteed, handles can not directly influence the foundation bearing capacity well, even to follow-up waterproof, the loss that the bottom plate concrete construction caused to be difficult to remedy.

Therefore, how to provide a local deep pit water conservancy diversion drainage ditch system is applied to the dewatering and drainage construction that precipitation foundation ditch area is big, and should not set up the dewatering well in the foundation ditch for local deep pit precipitation can be realized through construction process safety high-efficiently, is the technical problem that technical staff in the field need to solve urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a local pit water conservancy diversion escape canal system, in the foundation ditch, arrange reasonable interval's escape canal, the buried degree of depth is by the highly definite of needs precipitation, and in groundwater filtered layer infiltration ditch in the escape canal PVC drain pipe, the rethread drain pipe collects groundwater to be located the sump pit that the escape canal tip set up, draws water at sump pit installation immersible pump, reaches the requirement that reduces groundwater. The distance between the drainage ditches is determined according to the height and gradient of rainfall, and the drainage ditches are reasonably arranged, so that the requirement of different regions on the rainfall with different height differences can be met, excessive underground water cannot be pumped and reduced, and the engineering cost can be reduced by adopting the rainfall method.

The utility model provides a technical scheme that its technical problem adopted is:

a local deep pit diversion drainage ditch system comprises a plurality of drainage ditch grooves preset at a foundation pit needing dewatering, wherein a water filtering layer, a drainage pipe, sand stones and a concrete cushion layer are sequentially arranged in the drainage ditch grooves, and the water filtering layer is wrapped on the outer side of the drainage pipe; and water collecting wells are arranged at two ends of the drainage ditch, and submersible pumps are arranged in the water collecting wells and used for pumping and reducing underground water.

Compared with the prior art, the utility model discloses profitable technological effect lies in:

the utility model discloses a local deep pit water conservancy diversion drainage ditch system, in the foundation ditch, arrange reasonable interval's escape canal, be equipped with drainage layer, drain pipe, grit and concrete cushion in proper order in the escape canal, the drainage layer wraps up in the drain pipe outside; the two ends of the drainage ditch are provided with water collecting wells, and submersible pumps are arranged in the water collecting wells and used for pumping and reducing underground water. Groundwater permeates into a drainage pipe in the drainage ditch through a drainage layer in the drainage ditch, then the groundwater is collected into a water collecting well arranged at the end part of the drainage ditch through the drainage pipe, and a submersible pump is installed on the water collecting well to pump water, so that the requirement of reducing the groundwater is met. Through to the local rational arrangement escape canal groove of foundation ditch soil body, the escape canal groove interval is confirmed according to precipitation height and precipitation slope, arranges water filtering layer and drain pipe in the escape canal groove, sets up the sump pit at escape canal groove both ends, can reach the different altitude difference's of different regions precipitation requirement, does not cause again to take out too much groundwater of falling, adopts this precipitation method can reduce engineering cost.

Two, the utility model discloses a local deep pit water conservancy diversion escape canal system, construction easy operation, the effect is obvious, and labour saving and time saving saves, and the precipitation effect of foundation ditch can be guaranteed through the strip number that increases and decreases the escape canal, and easily accurate control precipitation height through the row's of playing of confirming the sump pit immersible pump height of arranging, and the automatic groundwater of arranging that falls guarantees to reduce groundwater's height, does not exceed the groundwater level that falls and also lets groundwater level high on the left, realizes accurate control.

Further, the water filtering layer comprises coarse pebbles and fine pebbles with different diameters, wherein the fine pebbles completely cover the water discharging pipe, and the coarse pebbles are positioned at the periphery of the fine pebbles. The coarse pebbles and the fine pebbles are arranged on the periphery of the drain pipe, so that a water filtering layer is formed, underground water firstly passes through the water filtering layer in the drainage ditch and then permeates into the drainage pipe in the drainage ditch, the underground water level is not over-reduced, the underground water level is not high, and the phenomena of quicksand, soil body disturbance and the like are reduced.

Further, for convenient for drawing materials, save the cost, the drain pipe is the PVC drain pipe, simultaneously, for the life of extension drain pipe, improves the durability, PVC drain pipe outer wall wraps one thick nylon screen cloth.

Furthermore, the drain pipe is locally provided with a pipe hole, and the diameter of the pipe hole is 20 mm. The groundwater filtered by the water filtering layer enters the drain pipe through the pipe hole and flows through the water collecting well at the end part of the drain pipe, and is pumped out by the submersible pump finally, so that the requirement of reducing the groundwater is met.

Furthermore, the water collecting well is formed by splicing prefabricated concrete pipes with the diameter of 1 m. Adopt prefabricated concrete pipe to assemble and form the sump pit, prefabricated pipe can directly be built by laying bricks or stones and connect more than growing to the foundation ditch excavation face, and prefabricated pipe is directly placed on the gravel layer of excavation sump pit bottom, and it is convenient to be under construction.

Further, the concrete cushion layer is 100mm thick in consideration of the stress stability and rigidity requirements.

Further, the interval of drainage ditch groove is confirmed according to precipitation height and precipitation slope, the precipitation slope is 1/10 ~ 1/15. By reasonably arranging the space and the embedding depth between adjacent drainage channels, the precipitation requirements of different regions and different height differences can be met, excessive underground water cannot be pumped and reduced, and the engineering cost can be reduced by adopting the precipitation method.

Drawings

Fig. 1 is a schematic cross-sectional view of a local pit diversion drainage ditch system according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a drain pipe in the local pit diversion trench system according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a drain pipe in a local pit diversion trench system according to an embodiment of the present invention;

fig. 4 is a schematic view illustrating the arrangement of drainage channels in the diversion drainage system of local deep pit according to an embodiment of the present invention.

In the figure:

1-a concrete cushion; 2-sandstone; 3-coarse pebbles; 4-fine pebbles; 5-drain pipe, 51-pipe hole; 6-screen cloth; 7-a drainage groove; 8-precipitation gradient; 9-foundation pit needing dewatering.

Detailed Description

The present invention provides a local pit diversion drainage ditch system, which is described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. The technical contents and features of the present invention will be described in detail below with reference to the accompanying drawings by way of examples. It should be further noted that the drawings are in simplified form and are not to precise scale, and are provided for the purpose of facilitating and clearly explaining the embodiments of the present invention. For convenience of description, the directions of "up" and "down" in the following description are the same as the directions of "up" and "down" in the drawings, but this should not be construed as limiting the technical solution of the present invention.

Example one

The structure composition of the local pit diversion drainage ditch system of the present invention is described with reference to fig. 1 to 4.

Referring to fig. 1 to 4, a local deep pit diversion drainage ditch system comprises a plurality of drainage ditch grooves 7 preset at a foundation pit 9 requiring water lowering, a water filtering layer, a drainage pipe 5, gravel 2 and a concrete cushion layer 1 are sequentially arranged in the drainage ditch grooves 7, and the water filtering layer is wrapped outside the drainage pipe 5; and water collecting wells are arranged at two ends of the drainage ditch 7, and submersible pumps are arranged in the water collecting wells and used for pumping and reducing underground water.

Particularly, the drainage ditch system with the local deep pit diversion of the utility model arranges drainage ditches 7 with reasonable intervals at the foundation pit 9 needing dewatering, a water filtering layer, a drainage pipe 5, gravels 2 and a concrete cushion layer 1 are sequentially arranged in the drainage ditches 7, and the water filtering layer is wrapped outside the drainage pipe 5; and water collecting wells are arranged at two ends of the drainage ditch 7, and submersible pumps are arranged in the water collecting wells and used for pumping and descending underground. Groundwater permeates the drain pipe 5 in the drainage ditch groove through the drainage bed in the drainage ditch groove 7, and groundwater is collected to the sump pit that is arranged in the drainage ditch groove tip through the drain pipe 5 in, draws water at the sump pit installation immersible pump, reaches the requirement that reduces groundwater. Through to the local rational arrangement of foundation ditch soil

body escape canal

7, 7 intervals of escape canal are confirmed according to precipitation height and precipitation slope, arrange drainage layer and drain pipe 5 in escape canal 7, set up the sump pit at 7 both ends in escape canal, can reach the precipitation requirement of different differences in height in different regions, do not lead to taking out too much groundwater of falling again, realize accurate control, adopt this precipitation method can reduce engineering cost.

In the present embodiment, it is more preferable that the drainage layer comprises coarse pebbles 3 and fine pebbles 4 with different diameters, wherein the fine pebbles 4 completely cover the drainage pipe 5, and the coarse pebbles 3 are located at the periphery of the fine pebbles 4. Coarse pebbles 3 and fine pebbles 4 are arranged on the periphery of the drain pipe 5, so that a water filtering layer is formed, underground water firstly passes through the water filtering layer in the drainage groove 7 and then permeates into the drain pipe 5 in the drainage groove 7, the underground water level is not over-reduced, the underground water level is not high, and the phenomena of flowing sand, soil body disturbance and the like are reduced.

In this embodiment, more preferably, for convenient for draw materials, save the cost, drain pipe 5 is the PVC drain pipe, simultaneously, for extension drain pipe 5's life, improves the durability, thick nylon screen cloth 6 is wrapped together to PVC drain pipe outer wall.

In the present embodiment, it is more preferable that the drain pipe 5 is partially opened with pipe holes 51 having a hole diameter of 20mm and arranged at intervals along a circumference of the drain pipe 5. The groundwater filtered by the water filtering layer enters the drain pipe 6 through the pipe hole 51 and flows through the water collecting well at the end part of the drain pipe, and is pumped out by the submersible pump finally, so that the requirement of reducing the groundwater is met.

In this embodiment, it is more preferable that the water collecting well is assembled by prefabricated concrete pipes with a diameter of 1 m. Adopt prefabricated concrete pipe to assemble and form the sump pit, prefabricated pipe can directly be built by laying bricks or stones and connect more than growing to the foundation ditch excavation face, and prefabricated pipe is directly placed on the gravel layer of excavation sump pit bottom, and it is convenient to be under construction.

In this embodiment, it is more preferable that the thickness of the concrete pad 1 is 100mm in consideration of the force stability and rigidity requirements.

In this embodiment, more preferably, the distance between the drainage channels 7 is determined according to the precipitation height and the precipitation gradient 8, and the precipitation gradient 8 is 1/10-1/15. By reasonably arranging the space and the embedding depth between the adjacent drainage ditches 7, the precipitation requirements of different height differences of different regions can be met, and excessive underground water is not pumped and reduced.

With continuing reference to fig. 1 to 4, the present invention further provides a construction method of the local pit diversion trench system, which includes:

excavating the earthwork of the foundation pit above the underground water level, positioning and paying off a drainage ditch 7, mechanically excavating the drainage ditch 7, and installing a submersible pump to clearly drain temporary accumulated water in the excavation drainage ditch 7;

coarse pebbles 3 are laid in the drainage ditch 7, a PVC drainage pipe is placed, and the PVC drainage pipe is covered by fine pebbles 4;

backfilling the drainage ditch 7 with sand stones 2;

pouring a concrete cushion layer 1;

the two ends of the drainage ditch 7 are provided with a water collecting well formed by assembling prefabricated concrete pipes, and a submersible pump is arranged in the water collecting well for pumping and reducing underground water.

In this embodiment, more preferably, in order to satisfy the different altitude differences's of different regions precipitation requirement, save construction cost, the degree of depth of burying underground of drainage ditch 7 by the degree of depth that the foundation ditch needs precipitation is confirmed, and different precipitation degree of depth regions, the 7 bottom elevations of drainage ditch can set up differently.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. The local deep pit diversion drainage ditch system is characterized by comprising a plurality of drainage ditches preset at a foundation pit needing dewatering, wherein a water filtering layer, a drainage pipe, sand stones and a concrete cushion layer are sequentially arranged in the drainage ditches, and the water filtering layer wraps the outer side of the drainage pipe; and water collecting wells are arranged at two ends of the drainage ditch, and submersible pumps are arranged in the water collecting wells and used for pumping and reducing underground water.

2. The system of the partial pit diversion drain ditch of claim 1, wherein the water filtering layer comprises coarse pebbles and fine pebbles with different diameters, wherein the fine pebbles completely cover the drain pipe, and the coarse pebbles are located at the periphery of the fine pebbles.

3. The local pit diversion drain ditch system of claim 1, wherein the drain pipe is a PVC drain pipe, and the outer wall of the PVC drain pipe is wrapped with a coarse nylon mesh cloth.

4. The local pit diversion drain ditch system of claim 1, characterized in that the drain pipe is provided with pipe holes locally, and the diameter of the pipe hole is 20 mm.

5. The local pit diversion drainage ditch system of claim 1, wherein the water collection well is assembled by prefabricated concrete pipes with the diameter of 1 meter.

6. The local pit diversion trench system of claim 1, wherein the concrete pad thickness is 100 mm.

7. The local deep pit diversion drainage ditch system of claim 1, wherein the distance between the drainage ditches is determined according to the height of precipitation and the gradient of precipitation, and the gradient of precipitation is 1/10-1/15.