CN210163883U

CN210163883U - Soft soil foundation deep foundation pit structure

Info

Publication number: CN210163883U
Application number: CN201920197221.0U
Authority: CN
Inventors: 陈亮; 周晓龙; 谷海静; 陈辉; 胡盛龙
Original assignee: Baisheng United Group Ltd
Current assignee: Baisheng United Group Ltd
Priority date: 2019-02-14
Filing date: 2019-02-14
Publication date: 2020-03-20
Anticipated expiration: 2029-02-14

Abstract

The utility model discloses a weak soil foundation deep basal pit structure, its technical scheme main points are including the precast concrete pile, with the honeycomb duct that the precast concrete pile is connected, the honeycomb duct top is provided with sealed film, sealed film top is provided with drain pipe and vacuum pump, the honeycomb duct passes sealed film and can dismantle with the drain pipe and be connected, honeycomb duct and drain pipe one-to-one setting, it is a plurality of the one end intercommunication that the honeycomb duct was kept away from to the drain pipe has the drain main, drain main and vacuum pump connection, the inside cavity of precast concrete pile, cavity position form drainage channel, precast concrete pile lateral wall is provided with a plurality of wash port, the wash port switches on with drainage channel, and this structure is favorable to reinforcing treatment before early excavation.

Description

Soft soil foundation deep foundation pit structure

Technical Field

The utility model relates to a geotechnical engineering technical field, more specifically the utility model relates to a weak soil foundation deep basal pit structure that says so.

Background

The large-scale sea reclamation project and coastal zone development project in coastal areas of China develop rapidly. Coastal areas such as Tianjin, Jiangsu, Guangdong and Zhejiang are widely landfilled, and the areas are mostly silt soft soil with high water content and high compressibility. Taking the Wenzhou coastal industrial zone as an example, the soil foundation is a typical weak soil foundation with low soil strength, high sensitivity, high water content, high compressibility and flowing state.

The utility model discloses before, there is the foundation ditch excavation degree of difficulty huge in the foundation ditch excavation of the weak ground of wenzhou coastal dredger fill, and large construction machinery is difficult to the approach, and foundation ditch excavation cost is high, and the construction period is long, and the later stage subsides big scheduling problem.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a weak soil foundation deep basal pit structure, this structure is favorable to carrying out reinforcement processing before early excavation.

In order to achieve the above purpose, the utility model provides a following technical scheme: a deep foundation pit structure of a soft soil foundation comprises a concrete precast pile and a flow guide pipe connected with the concrete precast pile, a sealing film is arranged above the flow guide pipe, a drain pipe and a vacuum pump are arranged above the sealing film, the flow guide pipe penetrates through the sealing film to be detachably connected with the drainage pipes, the flow guide pipe and the drainage pipes are arranged in a one-to-one correspondence mode, one ends of the drainage pipes, far away from the flow guide pipe, are communicated with a drainage main pipe, the drainage main pipe is connected with a vacuum pump, the interior of the concrete precast pile is hollow, a drainage channel is formed at the hollow part, the side wall of the concrete precast pile is provided with a plurality of drain holes which are communicated with a drain passage, the position adhesion that sealed film supplied the honeycomb duct to pass has the sealing ring, the sealing ring outside is provided with the rubber circle, rubber circle and sealing ring fixed connection, the rubber circle is contradicted with sealed film and is sealed.

Furthermore, fine sand is filled in the drainage channel.

Furthermore, concrete is filled in the drainage channel.

Furthermore, the junction of honeycomb duct and drain pipe is provided with the seal assembly who is used for preventing the air admission, seal assembly is including the annular cover of cover locating the pipeline lateral surface and setting up in the inside elastic webbing of annular cover, the annular cover is formed by first semi-ring and second semi-ring, first semi-ring and second semi-ring are articulated, first semi-ring and second semi-ring conflict and connect and form the sealing ring, be provided with outside extension first mounting plate and second mounting plate on first semi-ring and the second semi-ring side, first mounting plate and second mounting plate set up in the one side relative with first semi-ring and second semi-ring pin joint, first mounting plate and second mounting plate are made by elastic material, all be provided with the through-hole that supplies fastening bolt to pass on first mounting plate and the second mounting plate.

Further, the elastic band is made of rubber.

The utility model has the advantages that:

1. the concrete precast pile is embedded below a foundation, the concrete precast pile is completely embedded into soil of the foundation, a layer of sealing film is paved on the concrete precast pile, a flow guide pipe is connected on the concrete precast pile (the flow guide pipe penetrates through the sealing film but no gap is reserved between the flow guide pipe and the sealing film), a drain pipe penetrates through the sealing film and then is connected with the flow guide pipe, the flow guide pipe is connected with a vacuum pump, the side surface of the concrete precast pile is provided with a plurality of small holes, a drainage channel is arranged inside the concrete precast pile, when the vacuum pump is opened, water in a soft soil foundation can enter a drain hole, flows into the drainage channel from the drain hole, then enters the flow guide pipe from the drainage channel, finally flows out of a drainage main pipe from the drain pipe to the outside, through the arrangement of the drain hole, the water in the soft soil foundation can enter the concrete precast pile, and through the, can take out the moisture in the soft soil foundation, sealing film need seal the part once sealing film cover department, prevent the air admission, but the easy fracture in the position that the honeycomb duct passed makes the air admission, the water is difficult to by the suction, consequently, supply the position adhesion sealing ring that the honeycomb duct passed at sealing film, install the sealing washer sealed with the honeycomb duct lateral wall laminating inside the sealing ring, setting through the sealing ring, can not tear sealing film behind the sealing film that the honeycomb duct passed, through the setting of sealing washer, just can not make inside the air admission sealing film, setting through sealing film, can cover whole soft soil foundation pit sealedly, prevent the soil below the air admission sealing film, so just be superior to prior art, can take out the moisture in the soft soil foundation, consolidate the foundation ditch.

2. After burying the concrete precast pile in the foundation ditch, pour into fine sand in drainage channel, one can increase the steadiness of concrete precast pile, has the space between the two fine sand, and the water gets into drainage channel through the wash port after with the space between the fine sand fill, and after the vacuum pump opened, the fine sand played the water conservancy diversion effect, transmitted the water to the honeycomb duct, and the retransmission is discharged to the external world at last to the drain pipe.

3. After the water is completely discharged, constructors inject concrete into the drainage channel through the diversion pipe to fill the concrete precast pile into a solid body, so that the weight of the concrete precast pile is increased, and the supporting force of the concrete precast pile is enhanced.

4. The guide pipe is fixedly connected to the concrete precast pile, the drain pipe is detachably connected with the guide pipe, when moisture in the soft soil foundation needs to be sucked out, the guide pipe is connected with the drain pipe in an assembling mode, after the moisture in the soft soil foundation is sucked out, the drain pipe can be detached from the guide pipe, if the sealing performance between the drain pipe and the guide pipe is not strong, air enters from the joint, the moisture in the soft soil foundation can be easily discharged, therefore, a sealing assembly is arranged between the drain pipe and the guide pipe, the sealing assembly can prevent air from entering the joint of the guide pipe and the drain pipe, the annular sleeve is composed of a first half ring and a second half ring, an elastic belt is arranged in the first half ring and the second half ring, when the annular sleeve is arranged at the joint of the drain pipe and the guide pipe, the first half ring and the second half ring are firstly opened (at the moment, the elastic belt is, then the annular sleeve is sleeved at the joint of the draft tube and the drain pipe, the first half ring or the second half ring is rotated to enable the first half ring and the second half ring to be abutted, (at the moment, the elastic band wraps the outer side surfaces of the first half ring and the second half ring to prevent air from entering from the joint), and finally, the fastening screw penetrates through the second fastening plate of the first fastening plate to fix the second half ring of the first half ring.

5. The rubber has good ductility and high sealing property.

Drawings

FIG. 1 is a schematic plan view of a deep foundation pit structure of a soft soil foundation;

FIG. 2 is a detailed block diagram of the seal assembly;

fig. 3 is a diagram showing a connection structure of the sealing film and the sealing ring.

Reference numerals: 1. prefabricating a pile by concrete; 11. a flow guide pipe; 12. sealing the film; 2. a drain pipe; 21. a vacuum pump; 22. a main drain pipe; 3. a drain hole; 4. a drainage channel; 5. a seal ring; 51. a rubber ring; 6. a seal assembly; 61. an annular sleeve; 661. a first half ring; 662. a second half ring; 62. an elastic band; 7. a first fastening plate; 71. a second fastening plate; 8. and a through hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1 to 3, the deep foundation pit structure of the soft soil foundation of the embodiment includes a precast concrete pile 1 and a draft tube 11 connected to the precast concrete pile 1, a sealing film 12 is disposed above the draft tube 11, a drain pipe 2 and a vacuum pump 21 are disposed above the sealing film 12, the draft tube 11 passes through the sealing film 12 and is detachably connected to the drain pipe 2, the draft tube 11 and the drain pipe 2 are disposed in one-to-one correspondence, one end of the drain pipe 2, which is far away from the draft tube 11, is communicated with a drain header pipe 22, the drain header pipe 22 is connected to the vacuum pump 21, the precast concrete pile 1 is hollow, a drain passage 4 is formed in the hollow portion, a plurality of drain holes 3 are disposed on a side wall of the precast concrete pile 1, the drain holes 3 are communicated with the drain passage 4, and a sealing ring 5 is bonded to a portion of the, the outside of sealing ring 5 is provided with rubber circle 51, rubber circle 51 and sealing ring 5 fixed connection, rubber circle 51 is contradicted with sealing film 12 and is sealed.

The method comprises the steps of burying a concrete precast pile 1 below a foundation, burying the concrete precast pile 1 into soil of the foundation completely, paving a sealing film 12 on the concrete precast pile 1, connecting a draft tube 11 on the concrete precast pile 1 (the draft tube 11 penetrates through the sealing film 12 but no gap should exist between the draft tube 11 and the sealing film 12), connecting a drain pipe 2 with the draft tube 11 after penetrating through the sealing film 12, connecting the draft tube 11 with a vacuum pump 21, arranging a plurality of small holes on the side surface of the concrete precast pile 1, arranging a drainage channel 4 in the concrete precast pile 1, enabling water in a soft soil foundation to enter a drain hole 3 when the vacuum pump 21 is opened, enabling the water to flow into the drainage channel 4 from the drain hole 3, then entering the draft tube 11 from the drainage channel 4, finally flowing out of a drainage main pipe 22 from the drain pipe 2 and finally flowing out to the outside, and enabling the water in the soft soil foundation to enter the concrete precast pile 1 through the arrangement, through the arrangement of the drainage channel 4, the draft tube 11 and the drainage pipe 2, the water in the soft soil foundation can be pumped out, the sealing film 12 needs to seal the part covered by the sealing film 12 to prevent air from entering, but the part passed by the draft tube 11 is easy to crack to make air enter, and water is difficult to suck out, therefore, the sealing ring 5 is sewed at the part passed by the draft tube 11 of the sealing film 12, the sealing ring which is sealed by being attached to the outer side wall of the draft tube 11 is arranged in the sealing ring 5, through the arrangement of the sealing ring 5, the sealing film 12 can not be torn off after the sealing film 12 passed by the draft tube 11, through the arrangement of the sealing ring, the air can not enter the sealing film 12, through the arrangement of the sealing film 12, the whole soft soil foundation pit can be covered and sealed, and the air can be prevented from entering the land below the, moisture in the soft soil foundation can be pumped out, and the foundation pit is reinforced.

As a modified specific embodiment, fine sand is filled in the drainage channel 4.

After burying concrete precast pile 1 in the foundation ditch, pour into fine sand in drainage channel 4, one can increase concrete precast pile 1's steadiness, has the space between the two fine sand, and the water gets into drainage channel 4 through wash port 3 after with the space between the fine sand fill, and after vacuum pump 21 opened, the fine sand played the water conservancy diversion effect, transmitted water to honeycomb duct 11, and the retransmission is discharged to the external world at last to drain pipe 2.

As a modified specific implementation mode, concrete is filled in the drainage channel 4.

After the water body is completely discharged, the constructor injects concrete into the drainage channel 4 through the draft tube 11 to fill the concrete precast pile 1 into a solid body, so as to increase the weight of the concrete precast pile 1, thereby enhancing the supporting force of the concrete precast pile 1.

As a modified embodiment, a sealing assembly 6 for preventing air from entering is disposed at the junction of the flow guide pipe 11 and the water discharge pipe 2, the sealing assembly 6 includes an annular sleeve 61 sleeved on the outer side surface of the pipeline and an elastic band 62 disposed inside the annular sleeve 61, the annular sleeve 61 is formed by a first half ring 661 and a second half ring 662, the first half ring 661 and the second half ring 662 are hinged, the first half ring 661 and the second half ring 662 are in interference connection to form a sealing ring 5, a first fastening plate 7 and a second fastening plate 71 extending outwards are disposed on the side surfaces of the first half ring 661 and the second half ring 662, the first fastening plate 7 and the second fastening plate 71 are disposed on the side opposite to the hinge point of the first half ring 661 and the second half ring 662, and a through hole 8 for a fastening bolt to pass through is disposed on each of the first fastening plate 7 and the second fastening plate 71.

The guide pipe 11 is fixedly connected to the concrete precast pile 1, the drain pipe 2 is detachably connected with the guide pipe 11, when moisture in the soft soil foundation needs to be sucked out, the guide pipe 11 is connected with the drain pipe 2 in an assembling manner, after the moisture in the soft soil foundation is sucked out, the drain pipe 2 is detached from the guide pipe 11, if the sealing performance between the drain pipe 2 and the guide pipe 11 is not strong, and air enters from the connection part, the moisture in the soft soil foundation can be easily discharged, so that the sealing assembly 6 is arranged between the drain pipe 2 and the guide pipe 11, the sealing assembly 6 can prevent air from entering the connection part between the guide pipe 11 and the drain pipe 2, the annular sleeve 61 is composed of a first half ring 661 and a second half ring 662, the elastic belt 62 is arranged in the first half ring 661 and the second half ring 662, when the annular sleeve 61 is installed at the connection part between the drain pipe 2 and the guide pipe 11, the first half ring 661 and the second half ring 662 are opened (at this time, the elastic band 62 is in a stretched state), the annular sleeve 61 is sleeved on the connection between the flow guiding pipe 11 and the water discharging pipe 2, the first half ring 661 or the second half ring 662 is rotated to make the first half ring 661 and the second half ring 662 abut against each other, (at this time, the elastic band 62 covers the outer side surfaces of the first half ring 661 and the second half ring 662 to prevent air from entering from the connection), and finally, the fastening screws are inserted through the second fastening plate 71 of the first fastening plate 7 to fix the second half ring 662 of the first half ring 661.

As a modified embodiment, the elastic band 62 is made of rubber.

The rubber has good ductility and high sealing property.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a soft soil foundation deep basal pit structure which characterized in that: the concrete precast pile comprises a concrete precast pile (1) and a flow guide pipe (11) connected with the concrete precast pile (1), wherein a sealing film (12) is arranged above the flow guide pipe (11), a drain pipe (2) and a vacuum pump (21) are arranged above the sealing film (12), the flow guide pipe (11) penetrates through the sealing film (12) and is detachably connected with the drain pipe (2), the flow guide pipe (11) and the drain pipe (2) are arranged in a one-to-one correspondence manner, one end, far away from the flow guide pipe (11), of a plurality of drain pipes (2) is communicated with a drain header pipe (22), the drain header pipe (22) is connected with the vacuum pump (21), the interior of the concrete precast pile (1) is hollow, a drain passage (4) is formed in the hollow part, a plurality of drain holes (3) are arranged on the side wall of the concrete precast pile (1), and the drain holes, the sealing film (12) is adhered to a sealing ring (5) at a position where the guide pipe (11) penetrates, a rubber ring (51) is arranged outside the sealing ring (5), the rubber ring (51) is fixedly connected with the sealing ring (5), and the rubber ring (51) is abutted to the sealing film (12) for sealing.

2. A soft soil foundation deep foundation pit structure according to claim 1, characterized in that: and fine sand is filled in the drainage channel (4).

3. A soft soil foundation deep foundation pit structure according to claim 1, characterized in that: the drainage channel (4) is filled with concrete.