CN210439318U

CN210439318U - Assembled precipitation well

Info

Publication number: CN210439318U
Application number: CN201920722565.9U
Authority: CN
Inventors: 龚俊; 徐攀; 夏杰; 胡炎海; 陈晓东
Original assignee: China First Metallurgical Group Co Ltd
Current assignee: China First Metallurgical Group Co Ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-05-01
Anticipated expiration: 2029-05-20

Abstract

The application provides an assembled precipitation well belongs to the building field. Comprising at least one inner well tubular; at least one well pipe joint matched with the inner well pipe, wherein the well pipe joint is detachably sleeved on one end of the inner well pipe; at least one outer well pipe is coupled to the well pipe joint, the outer well pipe being detachably sleeved to one end of the well pipe joint and concentrically arranged with the inner well pipe. The device can be assembled and disassembled quickly, and can be immediately sunk and molded after being installed, so that the construction efficiency is improved.

Description

Assembled precipitation well

Technical Field

The application relates to the field of buildings, in particular to an assembled dewatering well.

Background

In recent years, with the continuous development of underground space utilization, the projects of oversized and deep foundation pits are increased day by day, and the difficulty of foundation pit construction is correspondingly increased. In deep foundation pit engineering, precipitation construction becomes an important construction content in foundation pit construction, and the success or failure of foundation pit construction is influenced. Before earth excavation, precipitation wells are required to be arranged for precipitation, earth excavation is carried out when the water level drops to a position specified by a scheme, most of the traditional precipitation well structures adopt the forms of steel pipes, reinforced concrete pipes, water filtering net precipitation well pipes wrapped outside reinforcement cages and the like, when the finished wells are required to be lowered before earth excavation, construction steps of finished pipes, filter material filling and the like are required, the requirement on the well hole forming quality is high, once the well hole quality is poor or the filter material filling is not uniform, the precipitation efficiency of the pipe wells is insufficient, and the construction requirement cannot be met; secondly, every time after one deck earthwork excavation is accomplished, need reduce precipitation well structure can satisfy the construction needs, and the job site adopts cutting operation to amputate upper strata precipitation well structure mostly, not only precipitation efficiency is low, extravagant material, inconvenient construction, and the precipitation well of still being not convenient for is maintained and is managed, is not conform to current safe environmental protection construction theory.

SUMMERY OF THE UTILITY MODEL

One of the purposes of this application lies in providing an assembled precipitation well, aims at improving the problem that precipitation well mechanism efficiency of construction among the prior art is low.

The technical scheme of the application is as follows:

an assembly dewatering well comprising:

at least one inner well tubular;

at least one well pipe joint matched with the inner well pipe, wherein the well pipe joint is detachably sleeved on one end of the inner well pipe;

and the outer well pipe is detachably sleeved on one end of the well pipe joint and is concentrically arranged with the inner well pipe.

As a technical solution of the present application, the inner well pipe is threadedly connected to the well pipe joint, and the well pipe joint is threadedly connected to the outer well pipe.

As a technical scheme of the application, the inner wall and the outer wall of the well pipe joint are both provided with connecting screw threads.

As a technical scheme of the application, a plurality of connecting plates are arranged between the inner wall and the outer wall of the well pipe joint.

As a technical scheme of this application, all be provided with the connection screw thread on the outer wall of two relative tip of interior well casing.

As a technical scheme of this application, seted up a plurality of drainage holes on the interior well casing.

As a technical scheme of this application, install the multilayer filter screen in the interior well casing.

As a technical scheme of this application, seted up a plurality of drainage holes on the outer well casing.

In one embodiment of the present invention, the water filtering holes are arranged in a row on the outer well pipe at the same interval.

As a technical scheme of this application, the interior well casing with have the cavity between the outer well casing, the cavity is inside to be provided with the sand bag.

The beneficial effect of this application:

the assembled dewatering well comprises an outer well pipe, an inner well pipe, a well pipe joint and an annular abrasive belt; the size of the outer well pipe is equal to or slightly smaller than that of a rotary-digging hole, the outer well pipe is used as an external support of the precipitation well structure, the length modulus of the outer well pipe is generally set according to the height of an earth excavation layer, the length is generally between 3.0m and 3.5m, the length of the outer well pipe is 0.5m to 1.0m higher than the single-layer excavation depth, screw threads connected with the outside of a well pipe joint are arranged at two ends of the outer well pipe, the length of the screw threads is calculated according to the load of the well pipe, water filtering holes are arranged between the screw threads connected with the two ends of the outer well pipe and used as first water filtering holes of the precipitation well, the diameter of each water filtering hole is 6mm, the distance between the water filtering holes is 10cm (the size; the diameter of the inner well pipe is about 1/2 to 2/3, the length of the inner well pipe is consistent with that of the outer well pipe, screw threads connected with the screw threads connected in the well pipe joint are arranged at two ends of the inner well pipe, the rotation direction and the length of the screw threads are the same as those of the outer well pipe, water filtering holes are arranged between the screw threads connected at two ends of the inner well pipe, the diameter and the distance of the water filtering holes are the same as those of the water filtering holes of the outer well pipe, three layers of 80-mesh steel gauze are arranged between the screw threads connected at two ends of the inner well pipe and used as a second water filtering hole, and underground water is filtered; the well pipe joint is provided with a well pipe joint external connecting screw thread, a well pipe joint internal connecting screw thread and a connecting plate, wherein the well pipe joint external connecting screw thread and the well pipe joint internal connecting screw thread respectively correspond to the external well pipe and the internal well pipe connecting screw thread, the size of the external connecting screw thread and the internal well pipe connecting screw thread can be just connected with the external well pipe and the internal well pipe, and the connecting plate is arranged between the internal connecting screw thread and the external connecting screw thread of the well pipe joint and is used as a connecting screw thread symmetrical shaft at two ends of the well; a cavity is formed between the inner well pipe and the outer well pipe, the horizontal distance of the cavity is the distance between an inner well pipe connecting screw thread and an outer well pipe connecting screw thread of the well pipe joint, the vertical distance is the length of the well pipe, an annular sand bag is placed in the cavity, the size of an abrasive belt is set according to the size of the cavity and is used for filtering underground water entering from a water filtering hole of the outer well pipe, and an up-down communicated cavity is formed inside the connecting screw thread in the well pipe joint and is used for pumping water and lowering water; the whole dewatering well structure is made of steel, and the wall thickness of the well pipe is determined through calculation. Utilize GPS or total powerstation, combine the lofting coordinate of design drawing to carry out the lofting and make the sign, then dig the pore-forming soon in the position of sign, the pore-forming degree of depth is according to design requirement plus 0.5m, and a small amount of medium grit is placed to the bottom, prevents that well casing joint from being stuck by precipitation well bottom earth, is difficult for extracting. The well pipe joint is positioned, the inner well pipe and the outer well pipe are connected, and the annular abrasive belt is placed. According to the well with the formed hole, a small amount of medium coarse sand is poured at the bottom of the well, and the depth is within 0.5 m; the well head is provided with a positioning fixing device, the well pipe joint is positioned, the lower part of the first section of the well pipe joint can be free from a connecting screw thread (positioned at the bottommost part of the precipitation well), an inner well pipe of the first section and an outer well pipe of the first section are connected, an annular abrasive belt is placed in a cavity between the inner well pipe and the outer well pipe, the height of a sand bag is flush with the length of the well pipe, the abrasive belt in the cavity is tightly sealed and filled, four connecting parts are reserved, the second section of the well pipe joint is installed, the inner well pipe of the second section and the outer well pipe are installed, the annular sand bag is placed in the cavity, the well pipe is lengthened along with the well pipe structure, a truck crane is used for continuously lowering the well pipe, the height of the design regulation is analogized until the. And finally, selecting a pump and a pump pipe according to the set pumping rate, and communicating a power supply to pump water. And (4) when the underground water level falls to a proper position, excavating earthwork, disassembling the upper precipitation well pipe, taking out the sand bag, and so on, recovering all the precipitation well pipes and sand, and recycling. The device has the advantages that the pipe well is simple in structure, well bores are not easy to deform and collapse, construction steps are few, convenience and high efficiency are achieved, well pipes can be pulled out for repeated use, cost is low, and the device can be used in various ultra-deep foundation pit dewatering environments; simultaneously, this precipitation well can fast assembly and dismantlement, sinks the shaping immediately after the installation is accomplished, improves the efficiency of construction. The diameter of the outer well pipe is equal to or slightly smaller than the pore-forming size of the dewatering well, and the outer well pipe can be used as an external support of the dewatering well structure, so that the completeness of the whole dewatering well structure is guaranteed, and the damage to the pipe well caused by hole collapse and the like is prevented. Simultaneously, be provided with the drainage hole on the outer well pipe wall, as preliminary water filtering device, reduce the large granule soil body and reduce, in addition, whole precipitation well pore-forming in-process, the mud quantity is few, needs a small amount of mud at the pore-forming in-process originally, and the later stage need not mud, and is little to the influence of water and soil environment. In addition, an annular sand bag is arranged between the cavities of the inner well pipe and the outer well pipe and is used as a filter for filtering water entering from a water filtering hole of the outer well pipe, so that the loss of soil particles is further reduced, the annular sand bag can be recycled, and raw materials are saved; the inner well pipe is provided with a water filtering hole and a filter membrane as a last filtering device, so that all soil particles can be basically prevented from entering the well, the soil particles are prevented from being pumped away along with underground water, and the water and soil protection quality is further improved. The whole dewatering well is simple in structure, rapid in mounting, dismounting and construction, high in repeatable utilization rate and low in cost, and has extremely high application value compared with the traditional dewatering well structure.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural view of an assembled dewatering well provided in the embodiments of the present application;

FIG. 2 is a schematic plan view of a well tubular joint provided in an embodiment of the present application;

FIG. 3 is a side view of a well tubular joint provided in an embodiment of the present application;

FIG. 4 is a schematic plan view of an outer tubular string provided in an embodiment of the present application;

FIG. 5 is a side view of an outer tubular of an embodiment of the present application;

FIG. 6 is a schematic plan view of an inner well casing provided by an embodiment of the present application;

FIG. 7 is a side view of an inner wellbore provided by an embodiment of the present application;

figure 8 is a schematic plan view of an endless abrasive belt according to an embodiment of the present application.

Icon: 1-an assembly type dewatering well; 2-an inner well pipe; 3-a well pipe joint; 4-an outer well pipe; 5-connecting screw threads; 6-connecting plates; 7-water filtering holes; 8-a filter screen; 9-a cavity; 10-ring-shaped sand bag.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper" and "lower" are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation and operation, and thus, should not be construed as limiting the present application.

Further, in the present application, unless expressly stated or limited otherwise, the first feature may be directly contacting the second feature or may be directly contacting the second feature, or the first and second features may be contacted with each other through another feature therebetween, not directly contacting the second feature. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example (b):

referring to fig. 1 and fig. 2 and 3 in combination, the present application provides an assembly type dewatering well 1, which includes a plurality of inner well pipes 2, a plurality of well pipe joints 3 matched with the inner well pipes 2, and a plurality of outer well pipes 4, wherein the well pipe joints 3 are in a ring structure, an inner ring of the well pipe joints 3 is detachably sleeved on one end of the inner well pipes 2, the outer well pipes 4 are detachably sleeved on an outer end of the well pipe joints 3, and the inner well pipes 2 of the three are concentrically arranged.

In the present embodiment, the inner well pipe 2 and the well pipe joint 3 are screwed together, and the well pipe joint 3 and the outer well pipe 4 are screwed together.

It should be noted that, in this embodiment, referring to fig. 4 and fig. 5 in combination, the size of the outer well pipe 4 is equal to or slightly smaller than that of a rotary-excavated hole, and is used as an external support of the dewatering well structure, the length module of the outer well pipe 4 is generally set according to the height of an earth excavation layer, the length of the outer well pipe 4 is generally between 3.0m and 3.5m, and is 0.5m to 1.0m higher than the single-layer excavation depth, the two opposite ends of the outer well pipe 4 are provided with connecting screw threads 5 connected with the outer connecting screw threads 5 of the well pipe joint 3, the length of the connecting screw threads 5 thereon is calculated according to the well pipe load, a plurality of water filtering holes 7 arranged in rows are formed in positions between the connecting screw threads 5 at the two ends on the pipe wall of the outer well pipe 4, and the plurality of; as a first water filtering hole 7 of the dewatering well, the diameter of the water filtering hole 7 is 6mm, the distance between the water filtering holes 7 is 10cm (the size and the distance are adjusted according to the water flow), and the distance between the water filtering hole 7 and the connecting screw thread 5 is more than 10 cm.

Referring to fig. 6 and fig. 7, the diameter of the inner well pipe 2 is 1/2-2/3 of the diameter of the outer well pipe 4, the length of the inner well pipe 2 is the same as that of the outer well pipe 4, the two ends of the inner well pipe 2 are provided with connecting screw threads 5 connected with the connecting screw threads 5 in the well pipe joint 3, the rotating direction and the screw thread length of the connecting screw threads 5 of the inner well pipe 2 are the same as those of the outer well pipe 4, a plurality of water filtering holes 7 arranged in rows are formed in the position, between the connecting screw threads 5 at the two ends, of the pipe wall of the inner well pipe 2, the water filtering holes 7 are parallel and the same in distance, and the diameter and the distance of the water filtering holes 7 are the same as those of; meanwhile, a filter screen 8 is arranged between the two ends of the inner well pipe 2 and the connecting screw threads 5, and the filter screen 8 takes three layers of 80-mesh steel gauze as filter membranes which are used as second water filtering holes 7 for filtering underground water for the second time.

Referring to fig. 2 and fig. 3 in combination, the well pipe joint 3 is provided with a well pipe joint external connection screw 5, a well pipe joint internal connection screw 5 and a connection plate 6, wherein the well pipe joint external connection screw 5 and the well pipe joint 3 internal connection screw 5 correspond to the external well pipe 4 and the internal well pipe 2 connection screw 5 respectively, and have a size capable of being connected with the external well pipe 4 and the internal well pipe 2, and the connection plate 6 is arranged between the well pipe joint 3 internal and external connection screws 5 and serves as a symmetry axis of the connection screw 5 at two ends of the well pipe joint 3.

It should be noted that, in this embodiment, referring to fig. 8 in combination with fig. 1, a cavity 9 is formed between the inner well pipe 2 and the outer well pipe 4, the horizontal distance of the cavity 9 is the distance between the inner well pipe connecting screw 5 and the outer well pipe connecting screw 5 of the well pipe joint 3, the vertical distance is the length of the well pipe, an annular sand bag 10 is placed in the cavity 9, the size of the sand belt is set according to the size of the cavity 9 and is used for filtering groundwater entering from the water filtering holes 7 of the outer well pipe 4, and an up-down communicating cavity 9 is formed inside the inner connecting screw 5 of the well pipe joint 3 and is used for pumping water and lowering water; the whole dewatering well structure is made of steel, and the wall thickness of the well pipe is determined through calculation.

The working principle of the assembly type dewatering well 1 is as follows:

utilize GPS or total powerstation, combine the lofting coordinate of design drawing to carry out the lofting and make the sign, then dig the pore-forming soon in the position of sign, the pore-forming degree of depth is according to design requirement plus 0.5m, and a small amount of medium grit is placed to the bottom, prevents that well casing joint 3 from being stuck by precipitation well bottom earth, is difficult for extracting. The well pipe joint 3 is positioned and placed, the inner well pipe 2 is connected with the outer well pipe 4 through the well pipe joint 3, and the annular abrasive belt is placed. According to the well with the formed hole, a small amount of medium coarse sand is poured at the bottom of the well, and the depth is within 0.5 m; set up location fixing device at the well head, location well casing joint 3, the lower part of first section well casing joint 3 can not set up connecting screw thread 5 (be located precipitation well bottommost), connect the interior well casing 2 of first section and the outer well casing 4 of first section, including well casing 2, place annular abrasive band in the cavity 9 between the outer well casing 4, the sand bag height flushes with well casing length, the abrasive band is sealed and is filled closely in the cavity 9, leave four mouthfuls of connection positions, install second section well casing joint 3, install the interior well casing 2 of second section, outer well casing 4, place annular sand bag 10 in cavity 9. Along with the well casing structure extension, utilize the truck crane to constantly transfer the well casing to analogize to installing the height that designs the regulation, be provided with the sealing washer in outer well casing 4 and well casing joint 3 screw thread connected end portion, prevent that outside silt particle from damaging the screw thread. And finally, selecting a pump and a pump pipe according to the set pumping rate, and communicating a power supply to pump water. And (4) when the underground water level falls to a proper position, excavating earthwork, disassembling the upper precipitation well pipe, taking out the sand bag, and so on, recovering all the precipitation well pipes and sand, and recycling.

Therefore, the device has the advantages that the pipe well is simple in structure, well bores are not easy to deform and collapse, construction steps are few, convenience and high efficiency are achieved, well pipes can be pulled out for repeated use, cost is low, and the device can be used in various ultra-deep foundation pit dewatering environments; simultaneously, this precipitation well can fast assembly and dismantlement, sinks the shaping immediately after the installation is accomplished, improves the efficiency of construction. The diameter of the outer well pipe 4 is equal to or slightly smaller than the pore-forming size of the dewatering well, and the outer well pipe can be used as an external support of the dewatering well structure, so that the completeness of the whole dewatering well structure is ensured, and the damage to the pipe well caused by hole collapse and the like is prevented. Simultaneously, be provided with drainage hole 7 on the 4 walls of outer casing pipe, as preliminary water filtering device, reduce the large granule soil body and reduce, in addition, whole precipitation well pore-forming in-process, the mud quantity is few, needs a small amount of mud at pore-forming in-process originally, and the later stage need not mud, and is little to the influence of water and soil environment. In addition, an annular sand bag 10 is arranged between the cavities 9 of the inner well pipe 2 and the outer well pipe 4 and is used as a filter for filtering water entering from the water filtering holes 7 of the outer well pipe 4, so that the loss of soil particles is further reduced, the annular sand bag 10 can be recycled, and raw materials are saved; the inner well pipe 2 is provided with the water filtering holes 7 and the filter membrane as a last filtering device, which can basically prevent all soil particles from entering the well, prevent the soil particles from being pumped away with underground water, and further improve the protection quality of water and soil. The whole dewatering well is simple in structure, rapid in mounting, dismounting and construction, high in repeatable utilization rate and low in cost, and has extremely high application value compared with the traditional dewatering well structure.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An assembly type dewatering well is characterized by comprising:

at least one inner well tubular;

2. The fabricated dewatering well of claim 1, wherein the inner well casing is threadably connected to the well casing joint, and the well casing joint is threadably connected to the outer well casing.

3. The fabricated dewatering well of claim 2, wherein the well casing joint is provided with connecting threads on both the inner wall and the outer wall.

4. The fabricated dewatering well of claim 1, wherein a plurality of connection plates are mounted between the inner and outer walls of the well casing joint.

5. The fabricated dewatering well as claimed in claim 2, wherein the outer wall of the opposite ends of the inner well pipe are provided with connection screw threads.

6. The fabricated dewatering well as claimed in claim 1, wherein the inner well pipe has a plurality of drainage holes formed therein.

7. The fabricated dewatering well as claimed in claim 1, wherein a plurality of layers of filter screens are installed in the inner well pipe.

8. The fabricated dewatering well as claimed in claim 1, wherein the outer tubular casing defines a plurality of drainage holes.

9. The fabricated dewatering well of claim 8, wherein a plurality of the drainage holes are spaced at the same interval and arranged in a row on the outer well pipe.

10. The fabricated dewatering well as claimed in claim 1, wherein a cavity is provided between the inner well pipe and the outer well pipe, and a sand bag is provided inside the cavity.