CN213061970U

CN213061970U - Soft soil vacuum preloading foundation structure

Info

Publication number: CN213061970U
Application number: CN202021754614.6U
Authority: CN
Inventors: 董昱良; 麦小君; 蔡云光
Original assignee: Guangdong Jintuo Construction Engineering Co ltd
Current assignee: Guangdong Jintuo Construction Engineering Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-04-27
Anticipated expiration: 2030-08-20

Abstract

The utility model belongs to the technical field of the technique of building engineering structure and specifically relates to a soft soil vacuum preloading foundation structure is related to, its technical scheme main points are: comprises a soft soil foundation layer, a sand cushion layer and a sealing layer; the sand cushion layer and the sealing layer are sequentially laid on a soft soil foundation layer from bottom to top, a plurality of drain pipes are inserted into the soft soil foundation layer in a vertical direction, and a vacuum water suction pipe is arranged in the sand cushion layer; the vacuum water suction pipe is communicated with a plurality of connecting pipes at intervals along the length direction of the vacuum water suction pipe, the top end of the water discharge pipe extends out of the soft soil foundation and is communicated with the connecting pipes, and a connecting assembly is arranged between the connecting pipes and the water discharge pipe; this application has realized the high-speed joint of drain pipe and vacuum suction pipe through setting up coupling assembling, saves welding step one by one to the drain pipe, and the process is simple, simple to operate.

Description

Soft soil vacuum preloading foundation structure

Technical Field

The application relates to the technical field of constructional engineering structures, in particular to a soft soil vacuum preloading foundation structure.

Background

At present, in the process of road engineering project construction, soft soil foundations are often encountered, and because the bearing capacity of the foundations can not meet the construction requirements of projects, the soft soil foundations need to be treated by adopting a vacuum preloading construction technology, so that the bearing capacity of the foundations is improved.

The vacuum preloading method is that a sand cushion layer is laid on the surface of a soft soil foundation to be reinforced, then a vertical drainage pipeline is buried, an airtight sealing film is used for isolating the sand cushion layer from the atmosphere, the end part of the sealing film is buried and pressed, and a vacuum suction pipe buried in the sand cushion layer is used for vacuumizing by using a vacuum pump or other vacuum means, so that the negative pressure under the sand cushion layer is formed, and the effective stress of the foundation is increased.

However, the drainage pipeline and the vacuum suction pipe of the sand cushion layer in the prior art are usually fixed by welding, and the inventor considers that the prior art has the following defects: a plurality of drainage pipelines need to be spliced with the vacuum suction pipe one by one manually and then are welded, the process is complicated, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

In order to make things convenient for the installation between drain pipe and the vacuum suction pipe and improve pipeline installation's security, this application provides a soft soil vacuum preloading foundation structure.

The application provides a pair of soft soil vacuum preloading foundation structure adopts following technical scheme:

a soft soil vacuum preloading foundation structure comprises a soft soil foundation layer, a sand cushion layer and a sealing layer, wherein the sand cushion layer and the sealing layer are sequentially laid on the soft soil foundation layer from bottom to top; the vacuum water suction pipe is communicated with a plurality of connecting pipes at intervals along the length direction of the vacuum water suction pipe, the top end of the drain pipe extends out of the soft soil foundation layer and is communicated with the connecting pipes, and a connecting assembly is arranged between the connecting pipes and the drain pipe.

Through adopting above-mentioned technical scheme, constructor when installing a plurality of drain pipes and vacuum suction pipe, only need to absorb water the top of the mouth of pipe one-to-one correspondence's of a plurality of connecting pipes that set up on the pipe with the vacuum, utilize coupling assembling to connect, save and to drain pipe and vacuum suction pipe butt joint back welded operation one by one, also improved the operational safety when being convenient for install.

Preferably, coupling assembling including set up in the cyclic annular flange of the outer wall of drain pipe with set up in the draw-in groove of the inner wall of connecting pipe, cyclic annular flange have elasticity and with the cooperation of draw-in groove joint.

Through adopting above-mentioned technical scheme, during the installation, aim at the back with the mouth of pipe of drain pipe and the mouth of pipe of connecting pipe, press down the vacuum pipe that absorbs water for the connecting pipe cup joints in the drain pipe, continues to absorb water the pipe and press to the vacuum, makes the outer wall ring flange of drain pipe take place elastic deformation, carries out the joint cooperation with the draw-in groove of the inner wall of connecting pipe, has realized the drain pipe and has absorbed the high-speed joint of pipe with the vacuum.

Preferably, the longitudinal section of the annular flange is wedge-shaped.

Through adopting above-mentioned technical scheme, the longitudinal section of flange is the wedge, and the flange of wedge structure makes the connecting pipe resistance less when carrying out the joint downwards, accomplishes the joint back, because flange and draw-in groove butt position area of contact are big, and the connecting pipe is difficult for taking place the separation with the drain pipe, strengthens the connection.

Preferably, a sealing ring is arranged at the bottom of the annular flange, and the bottom surface of the sealing ring is abutted to the groove wall of the clamping groove at the bottom.

Through adopting above-mentioned technical scheme, accomplish the joint back, the sealing washer butt in the bottom of draw-in groove of cyclic annular flange bottom strengthens the leakproofness between connecting pipe and the drain pipe.

Preferably, the annular flanges are provided with a plurality of annular flanges, and the annular flanges are uniformly distributed along the length direction of the drain pipe.

Through adopting above-mentioned technical scheme, when being connected the draw-in groove of the inner wall of outer wall ring flange to the drain pipe and connecting pipe, can press downwards once more, reduce because the foundation of soft soil foundation subsides and leads to drain pipe and the condition that the pipe junction takes place to separate of vacuum suction.

Preferably, the connecting assembly comprises a threaded sleeve sleeved at the top end of the drain pipe, an internal thread is arranged on the inner wall of the threaded sleeve, and an external thread matched with the internal thread is arranged on the outer wall of the connecting pipe.

Through adopting above-mentioned technical scheme, during the installation, cup joint the drain pipe in the connecting pipe, rotatory thread bush for thread bush threaded connection is between drain pipe and vacuum suction pipe, and then has realized the high-speed joint of drain pipe and vacuum suction pipe.

Preferably, one end of the connecting pipe close to the vacuum suction pipe is provided with a limiting part for limiting the threaded sleeve.

Through adopting above-mentioned technical scheme, when the threaded sleeve pipe was connected drain pipe and vacuum suction pipe realization, the locating part was spacing to threaded sleeve's upward movement, avoided excessively rotatory threaded sleeve pipe to lead to threaded sleeve pipe to break away from the drain pipe.

Preferably, the end face of one end, away from the vacuum suction pipe, of the connecting pipe is provided with a positioning column, and the end face of the top end of the drain pipe is provided with a positioning hole for the positioning column to be in splicing fit.

Through adopting above-mentioned technical scheme, make things convenient for the initial positioning between drain pipe and the connecting pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when a plurality of drain pipes and the vacuum suction pipe are installed, a constructor only needs to align the pipe orifices of a plurality of connecting pipes arranged on the vacuum suction pipe with the end surfaces of the top ends of the drain pipes one by one and connect the drain pipes by utilizing the connecting assembly, so that the drain pipes are not welded one by one, and the process is simple and convenient to install;

2. the vacuum suction pipe is pressed downwards, so that the clamping grooves on the inner walls of the connecting pipes on the vacuum suction pipe are in clamping fit with the annular flange on the outer wall of the drain pipe, and the connecting pipes are quickly connected with the drain pipe;

3. the connecting pipe is matched with the external thread of the outer wall of the connecting pipe through the threaded pipe sleeve, and the connecting pipe is quickly connected with the drain pipe.

Drawings

Fig. 1 is an installation schematic view of a soft soil vacuum preloading foundation structure of embodiment 1 of the present application;

fig. 2 is a schematic structural view of a soft soil vacuum preloading foundation structure of embodiment 1 of the present application;

FIG. 3 is a sectional view showing the installation of a connection pipe and a drain pipe in embodiment 1 of the present application;

fig. 4 is an installation schematic view of a soft soil vacuum preloading foundation structure of embodiment 2 of the present application;

fig. 5 is a sectional view showing the installation of a connection pipe and a drain pipe in embodiment 2 of the present application.

Description of reference numerals: 1. a soft soil foundation layer; 2. a sand cushion layer; 3. a sealing layer; 4. a drain pipe; 5. a vacuum suction pipe; 6. a connecting pipe; 7. an annular flange; 8. a card slot; 9. a seal ring; 10. a threaded bushing; 11. a limiting member; 12. a positioning column; 13. a vacuum pump; 14. and a collecting pipe.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses soft soil vacuum preloading foundation structure.

Example 1

Referring to fig. 1 and 2, the soft soil vacuum preloading foundation structure includes a soft soil foundation layer 1, a sand cushion 2 and a sealing layer 3; the sand cushion layer 2 and the sealing layer 3 are sequentially laid on the soft soil foundation layer 1 from bottom to top, the periphery of the soft soil foundation layer 1 is surrounded by a sealing wall, a plurality of drain pipes 4 are inserted into the soft soil foundation layer 1 in a vertical direction, the drain pipes 4 are distributed at intervals, and the top ends of the drain pipes 4 extend out of the soft soil foundation layer 1; meanwhile, a plurality of vacuum water suction pipes 5 are laid in the sand cushion layer 2 along the horizontal direction, the vacuum water suction pipes are arranged in parallel, the bottom of each vacuum water suction pipe 5 is communicated with a plurality of connecting pipes 6 at intervals along the length direction of each vacuum water suction pipe 5, the connecting pipes 6 are arranged vertically, and the connecting pipes 6 correspond to the interval distribution according to the distribution of the drain pipes 4.

Referring to fig. 1 and 2, one end of the connection pipe 6, which is far away from the vacuum suction pipe 5, is communicated with the drain pipe 4, and a connection assembly is installed between the connection pipe 6 and the drain pipe 4. During construction, a worker can insert the drain pipes 4 at intervals on the soft soil foundation, then a sealing wall is arranged in the soft soil foundation area where the drain pipes 4 are inserted, the vacuum suction pipes 5 are horizontally arranged, the pipe orifices of the connecting pipes 6 on the vacuum suction pipes 5 are connected with the pipe orifices of the drain pipes 4 in a one-to-one correspondence mode, after connection is completed, the sand cushion layers 2 and the sealing layers 3 are laid to guarantee the sealing performance of the soft soil foundation area, then the vacuum pump 13 is connected, and water pumping is conducted on the soft soil foundation. In order to reduce vacuum pump 13's quantity, this embodiment corresponds and has set up collecting pipe 14, and collecting pipe 14 and a plurality of root vacuum suction pipe 5 communicate, and vacuum pump 13 communicates on the collecting pipe, thereby carries out the evacuation to the collecting pipe by vacuum pump 13 and realizes carrying out the operation that the negative pressure absorbed water to soft soil base course 1 inside.

Referring to fig. 3, specifically, the connecting assembly includes an annular flange 7 fixedly installed on the outer wall of one end of the drain pipe 4 extending out of the soft soil foundation layer along the circumferential direction of the horizontal direction and a clamping groove 8 circumferentially arranged on the inner wall of the connecting pipe 6, the drain pipe 4 is movably sleeved on the connecting pipe 6, in this embodiment, two annular flanges 7 may be provided, and the two annular flanges 7 are arranged along the length direction of the drain pipe 4; simultaneously, the diameter top-down of the longitudinal section of cyclic annular flange 7 crescent is the wedge setting, and draw-in groove 8 corresponds and sets up to annular wedge groove, and when cyclic annular flange 7 card goes into draw-in groove 8, cyclic annular flange 7 and the bottom butt of draw-in groove 8, and then increase area of contact, connecting pipe 6 and drain pipe 4 are difficult for taking place the separation, strengthen the stability of connecting.

Referring to fig. 3, a sealing ring 9 is bonded to the bottom of the annular flange 7 in the circumferential direction, and when the annular flange 7 is clamped in the clamping groove 8 and the annular flange 7 abuts against the clamping groove 8, the elastic deformation of the sealing ring 9 enhances the sealing effect; when the drain pipe 4 is installed on a soft foundation, attention should be paid to the cleaning of the annular flange 7 at the top of the drain pipe 4, and the poor sealing performance of the joint of the drain pipe and the clamping groove 8 caused by the sand and soil impurities mixed in the annular flange 7 is avoided;

the implementation process of the soft soil vacuum preloading foundation structure in the embodiment of the application is as follows: during the installation, insert at the interval on the soft soil foundation and establish drain pipe 4, the mouth of pipe of a plurality of connecting pipes 6 on the pipe 5 that absorbs water with the vacuum in the back aims at the mouth of pipe of drain pipe 4 one by one, make connecting pipe 6 cover locate on drain pipe 4, press vacuum drain pipe 4 and make connecting pipe 6 downstream, because annular flange 7 takes place elastic deformation and annular flange 7 and the slope of the 6 pipe wall contact surface of connecting pipe downwards, frictional force is less, connecting pipe 6 can move downwards, when annular flange 7 is through draw-in groove 8, annular flange 7 reconversion, realize the joint cooperation with draw-in groove 8, thereby the quick connection between drain pipe 4 and the vacuum pipe 5 that absorbs water has been realized.

Example 2

Referring to fig. 4 and 5, the present embodiment 2 differs from embodiment 1 in that: coupling assembling is including rotating the threaded sleeve 10 that cup joints in drain pipe 4 top, and the inner wall of threaded sleeve 10 is provided with the internal thread, and the outer wall of connecting pipe 6 is provided with the external screw thread with internal thread screw-thread fit. In the embodiment, the pipe diameter of the water discharge pipe 4 is consistent with the pipe diameter of the connecting pipe 6; meanwhile, the end face of one end, away from the vacuum water suction pipe 5, of the connecting pipe 6 is integrally formed with two positioning columns 12 along the length direction of the connecting pipe 6, the two positioning columns 12 are respectively located on two opposite sides of the end face of the connecting pipe 6, the top end face of the water discharge pipe 4 is provided with positioning holes for the two positioning columns 12 to be in splicing fit, the outer wall of the connecting pipe 6 is provided with a limiting part 11, the limiting part 11 can be set as a limiting ring, and the limiting ring is fixedly installed at the position, close to the vacuum water suction.

When the drainage pipe 4 and the vacuum suction pipe 5 need to be connected, a worker aligns the pipe orifices of the plurality of connecting pipes 6 arranged on the vacuum suction pipe 5 with the pipe orifices of the drainage pipe 4, and the connecting pipes 6 and the drainage pipe 4 are accurately positioned through the insertion fit of the positioning holes and the positioning columns 12; the screw sleeve is rotated to move upward, and when the screw sleeve 10 abuts against the stopper 11 of the connection pipe 6, the rotation of the screw sleeve 10 is stopped. At this time, the threaded sleeve 10 is fitted to the abutting portion between the drain pipe 4 and the connection pipe 6, and the connection between the connection pipe 6 and the drain pipe 4 is realized.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a soft soil vacuum preloading foundation structure which characterized in that: the water-saving and water-saving composite floor comprises a soft soil foundation layer (1), a sand cushion layer (2) and a sealing layer (3), wherein the sand cushion layer (2) and the sealing layer (3) are sequentially laid on the soft soil foundation layer (1) from bottom to top, a plurality of water drainage pipes (4) are inserted into the soft soil foundation layer (1) in a vertical direction, and a vacuum water suction pipe (5) is arranged in the sand cushion layer (2); vacuum suction pipe (5) have a plurality of connecting pipes (6) along its length direction interval intercommunication, stretch out on the top of drain pipe (4) soft soil foundation (1) and with connecting pipe (6) intercommunication, be provided with coupling assembling between connecting pipe (6) and drain pipe (4).

2. A soft soil vacuum preloading foundation structure as claimed in claim 1, wherein: coupling assembling including set up in the cyclic annular flange (7) of the outer wall of drain pipe (4) with set up in draw-in groove (8) of the inner wall of connecting pipe (6), cyclic annular flange (7) have elasticity and with draw-in groove (8) joint cooperation.

3. A soft soil vacuum preloading foundation structure as claimed in claim 2, wherein: the longitudinal section of the annular flange (7) is arranged in a wedge shape.

4. A soft soil vacuum preloading foundation structure as claimed in claim 2, wherein: and a sealing ring (9) is arranged at the bottom of the annular flange (7), and the bottom surface of the sealing ring (9) is abutted against the bottom of the clamping groove (8).

5. A soft soil vacuum preloading foundation structure as claimed in claim 2, wherein: the annular flanges (7) are provided with a plurality of annular flanges (7), and the annular flanges (7) are uniformly distributed along the length direction of the drain pipe (4).

6. A soft soil vacuum preloading foundation structure as claimed in claim 1, wherein: the connecting assembly comprises a threaded sleeve (10) sleeved on the top end of the drain pipe (4), an internal thread is arranged on the inner wall of the threaded sleeve (10), and an external thread matched with the internal thread is arranged on the outer wall of the connecting pipe (6).

7. A soft soil vacuum preloading foundation structure of claim 6, characterized in that: one end of the connecting pipe (6) close to the vacuum water suction pipe (5) is provided with a limiting piece (11) for the butt joint of the threaded sleeve (10).

8. A soft soil vacuum preloading foundation structure of claim 6, characterized in that: the end face of one end, far away from the vacuum water suction pipe (5), of the connecting pipe (6) is provided with a positioning column (12), and the end face of the top end of the drain pipe (4) is provided with a positioning hole for the positioning column (12) to be in splicing fit.