CN109853974B - Air bearing membrane system for foundation pit operation and construction method thereof - Google Patents
Air bearing membrane system for foundation pit operation and construction method thereof Download PDFInfo
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- CN109853974B CN109853974B CN201811632370.1A CN201811632370A CN109853974B CN 109853974 B CN109853974 B CN 109853974B CN 201811632370 A CN201811632370 A CN 201811632370A CN 109853974 B CN109853974 B CN 109853974B
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- 239000012528 membrane Substances 0.000 title claims abstract description 63
- 238000010276 construction Methods 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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- 235000017491 Bambusa tulda Nutrition 0.000 description 1
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
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Abstract
The air bearing membrane system comprises a hemispherical air bearing membrane at the upper part of a foundation pit, wherein a steel cable net is arranged on the outer side surface of the air bearing membrane, and the peripheral end parts of the air bearing membrane are connected with a counterweight foundation structure; the counterweight foundation structure is formed by splicing sections, and the air bearing film and the steel cable net are connected with the counterweight foundation structure through C-shaped pieces; the air bearing film also comprises a spraying system, a lighting system, a temperature detection system and a door and window system arranged on the air bearing film, wherein the systems can be automatically controlled. The air bearing films are fixedly connected, so that the counterweight requirement required by the supporting of the air bearing films is met, and the air bearing films are convenient to assemble, connect and disassemble; the different connection use modes of the air bearing film and the counterweight foundation structure during construction can enrich the field use of the air bearing film, facilitate the installation and connection of an external fan system and an internal support frame, and the internal fan system, a spraying system, a lighting system, a temperature control system and the like can be automatically controlled, thereby being beneficial to improving the construction environment.
Description
Technical Field
The invention belongs to the field of pollutant control in construction sites, and particularly relates to a membrane supporting system for foundation pit operation and a construction method thereof.
Background
In the construction process of the building engineering, due to the characteristics of earthwork and structure dismantling, a large amount of bare soil can be produced on site, and if wind and sand are extremely easy to produce in sudden strong wind weather, the surrounding air environment quality is seriously affected; in addition, the open-air operation mode affects the civilized construction image of the construction site due to the activities and transportation of a large number of personnel, machinery and materials; the traditional dust suppression method is to spray water and fall dust, a large amount of manpower and machinery are input, the input is extremely high, a large amount of water resources are wasted, or an air bearing film structure is adopted to cover a foundation pit to protect the diffusion of construction dust, but the structural foundation of the air bearing film is mainly cast-in-situ concrete piers or hoisting trusses and concrete counterweights, so that the site construction and the repeated use are not facilitated, the waste of working hours and materials is caused, and corresponding measures are not provided for the construction conditions such as internal dust, temperature, illumination and the like, so that the air bearing film system and the construction method which are convenient to install, repeatedly use and are beneficial to the site environment construction are needed to be provided.
Disclosure of Invention
The invention provides a membrane supporting system for foundation pit operation and a construction method thereof, which are used for solving the problems, and the specific technical scheme is as follows:
the gas bearing membrane system for foundation pit operation comprises a hemispherical gas bearing membrane at the upper part of a foundation pit, wherein a steel cable net is arranged on the outer side surface of the gas bearing membrane, and the gas bearing membrane and the peripheral end parts of the steel cable net are connected with a counterweight foundation structure; the counterweight foundation structure is circumferentially arranged around the foundation pit.
The counterweight foundation structure is formed by splicing sections and comprises a frame structure and concrete poured in the frame structure, wherein the frame structure comprises four longitudinal rods and a group of detachably connected member units which are connected on the longitudinal rods at intervals in parallel, the longitudinal rods of adjacent frame structures are detachably connected, and the connection mode is flange, sleeve or bolt connection; the member unit is rectangular and comprises a pair of horizontal rods, a pair of vertical rods and a diagonal rod connected to the intersection point of the horizontal rods and the diagonal rod, wherein a template is supported on the inner side of a square frame enclosed by the vertical rods and the member unit.
The air bearing membrane and the steel cable net are connected with the counterweight foundation structure through C-shaped pieces, and the C-shaped pieces are arranged along the side of the counterweight foundation structure in a through length mode.
The upper surface and the lower surface of the top of the C-shaped piece are respectively and detachably connected with a rubber plate and a clamping plate in sequence; the bottom end of the air bearing film and the end part of the steel cable are connected between the upper surface of the top of the C-shaped piece and the rubber plate, wherein the connection length of the steel cable is determined by the arc length of the height to be limited after the air bearing film is inflated.
An embedded part which is detachably connected is poured in the bottom of the C-shaped part and the top surface of the concrete; the embedded part is arranged at the edge of the upper surface of the concrete and at the side of the frame structure.
The air bearing membrane and the counterweight foundation structure are connected in two modes, wherein the first mode is that the bottom end around the air bearing membrane is connected with the inner side of the counterweight foundation structure, which is close to the foundation pit, and the second mode is that the bottom end around the air bearing membrane is connected with the outer side of the counterweight foundation structure.
The air bearing membrane is characterized in that a fan system is further connected to the outer side of the air bearing membrane in a first connecting mode, the fan system comprises a blower and an exhaust fan, the blower and the exhaust fan are distributed at intervals and are arranged on a counterweight foundation structure, a connecting port is formed in the air bearing membrane corresponding to the fan system, and an activated carbon air purifier is connected to the fan system in an inscription mode.
The second connecting mode is that a supporting system is connected between the inside of the air bearing film and the counterweight foundation structure, and the supporting system comprises a group of arc rods which are arranged at intervals up and down along the radian direction of the air bearing film, a group of vertical rods which are connected between the arc rods and the counterweight foundation structure, and a group of horizontal rods and diagonal rods which are connected between the vertical rods.
The air-bearing film also comprises a spraying system, a lighting system, a temperature detection system and a door and window system arranged on the air-bearing film, wherein the fan system, the spraying system, the lighting system, the temperature control system and the door and window system can be automatically controlled.
The construction method for the foundation pit operation air bearing membrane system comprises the following specific steps:
step one, determining the number of sections of a counterweight foundation structure according to the size of a foundation pit, and determining the length, width and height of each section of frame structure and the number of used poured concrete by combining the stress effect of an air bearing film; then erecting longitudinal rods, and installing member units at intervals in the longitudinal rods, wherein adjacent longitudinal rods are connected by flanges, sleeves or bolts;
step two, supporting the template at the side of the frame structure, casting concrete in sections, and embedding a hoisting ring on the side surface of the concrete in advance; arranging an embedded part and a C-shaped part on the upper surface of the concrete, wherein a plurality of sections of concrete pouring can be performed simultaneously;
step three, cleaning the air bearing film covered field, wherein the field surface is flat and has no exposed convex sharp corner part; checking the number of the air bearing films transported to the site, numbering the air bearing films, confirming the installation position, dividing the assembly area on the site, marking by using a striking red line, confirming the accurate position, and forming a one-to-one correspondence with the air bearing films;
hoisting the air bearing film to a corresponding field area respectively, and opening the air bearing film according to the marking direction on the package; setting a stretching anchor point on the short boundary of the air bearing film, and expanding the air bearing film in a winch-assisted mode by adopting manual rolling; then sequentially installing a clamping plate, a rubber plate and the like on the edge of the air bearing membrane;
step five, lifting the air bearing membrane boundary to a connecting position corresponding to the counterweight foundation structure and connecting the air bearing membrane boundary to the C-shaped piece, and finishing the fixation of the air bearing membrane boundary for a circle according to an installation plan; wherein, for one side of the installation position of the design fan system, the air bearing film is connected with the counterweight foundation structure by a first connection mode, and the other sides are connected with the counterweight foundation structure by a second connection mode, and a supporting system is supported;
step six, after the installation of the main body air bearing membrane on the ground is completed, paving a protective membrane on a membrane surface corresponding to the assembly position of the steel cable net, and sequentially connecting a transverse steel cable and a longitudinal steel cable on a C-shaped piece, wherein the steel cable and the embedded piece are respectively numbered and identified in a one-to-one correspondence manner, and the steel cable is sequentially placed and installed in place according to the numbered steel cable and the identified embedded piece to form the steel cable net;
step seven, processing the air bearing film upper door frame according to the design size, debugging the door lock, installing an explosion-proof observation window, inflating and forming the air bearing film, debugging the function and the air tightness of the door, installing automatic control equipment, a fan system, a spraying system, a lighting system, a temperature control system and the like, and debugging and checking one by one.
The invention has the following beneficial effects:
according to the invention, the air bearing membrane is temporarily fixed through the detachable connection counterweight foundation structure, so that the counterweight requirement required by the air bearing membrane support is met, and the assembly, the connection and the disassembly are convenient; the air bearing film and the counterweight foundation structure are connected in different use modes, so that the field use of the air bearing film can be enriched, the installation and connection of an external fan system and an internal support frame are facilitated, and the internal fan system, a spraying system, a lighting system, a temperature control system and the like can be automatically controlled, thereby being beneficial to the adjustment and improvement of the construction environment; the sectional splicing of the counterweight foundation structure has the characteristics of prefabrication, quick hoisting and repeated use, and saves the material construction time, wherein the frame structure in the counterweight foundation structure plays a role of a concrete skeleton, and is beneficial to concrete connection and structural stress; the steel cable net outside the air bearing film can limit the shape of the air bearing film after being inflated, has a limiting function, and can bear force together and has integrity; the steel cable and the air bearing film are both connected with the C-shaped piece in a detachable mode, the installation and the use are convenient, the height of the C-shaped piece can be finely adjusted according to indoor clearance, and the rubber plate is beneficial to the tightness of the air bearing film and is not easy to damage during connection. The invention is favorable for on-site material selection, the construction method is simple and convenient, the prefabricated and recyclable characteristics are realized, the working hours and materials are saved, and the invention has great significance for civilized environment-friendly construction.
Drawings
FIG. 1 is a construction plan view of a foundation pit operation air bearing membrane system;
FIG. 2 is a cross-sectional view of an air bearing membrane;
FIG. 3 is a schematic diagram of a frame structure;
FIG. 4 is a schematic illustration of the attachment of an air bearing membrane, wire mesh, and counterweight foundation structure;
FIG. 5 is a schematic illustration of a first air bearing membrane connected to a weighted base structure;
FIG. 6 is a schematic illustration of a second air bearing membrane connected to a weighted base structure;
FIG. 7 is a schematic diagram of a fan system connection.
Reference numerals: 1-air bearing film; 2-a counterweight base structure; 3-wire mesh; 4-a vertical rod; 5-building block units; 6-embedding parts; 7-C type pieces; 8-a rubber plate; 9-clamping plates; 10-a support system; 11-fan system.
Detailed Description
As shown in fig. 1 and 2, the length of the air bearing film 1 required by a foundation pit constructed on a certain site is about 135m, the width of the air bearing film is about 125m, and the plane projection area is about 16646 square meters; the air bearing film 1 is hemispherical at the upper part of the foundation pit, and the air bearing film 1 adopts advanced materials and processes to continuously inflate an indoor closed space as a main means, so that the air bearing film 1 becomes an inflatable film structure system with stable structure, simplicity and practicability, and resists loads of different working conditions; the four circumferences of the bottom of the air bearing film 1 are connected with the counterweight foundation structure 2, so that the safety and stability of the air film are ensured, and the requirement that the pressure of the air film to the ground does not exceed the bearing capacity of foundation pit supporting design files to the circumference of the foundation pit is also met.
In this embodiment, the outside of the membrane surface of the air bearing membrane 1 is connected with a longitudinal and transverse crossed steel cable, the cable net divides the membrane surface into a plurality of small units, the loading span of the membrane surface is reduced, the integrity and the wind load resistance are improved, and the possibility of tearing and damaging the membrane material is effectively reduced. Under the action of wind load, the deformation of the film surface can be greatly reduced due to the mutual restraining effect of all the steel ropes in the rope net.
The frame structure comprises four longitudinal bars 4 and a group of detachably connected member units 5 which are connected on the longitudinal bars 4 at intervals in parallel; the member unit 5 is rectangular and comprises a pair of horizontal rods, a pair of vertical rods and a diagonal rod connected at the intersection point of the horizontal rods and the diagonal rod, wherein a template is supported at the inner side of a square frame enclosed by the vertical rods 4 and the member unit 5.
As shown in fig. 3, the counterweight foundation structure 2 is formed by splicing segments, and comprises a frame structure and concrete poured in the frame structure, wherein the frame structure is welded by using square steel (100 mm ×100 mm ×6× 6 mm) made of Q235B, and comprises four longitudinal rods 4 and a group of detachable member units 5 connected on the longitudinal rods 4 at intervals in parallel; the longitudinal rods 4 of the adjacent frame structures are detachably connected in a flange, sleeve or bolt connection mode. The component units 5 are rectangular and comprise a pair of horizontal rods, a pair of vertical rods and inclined rods connected at the intersection points of the horizontal rods and the inclined rods, wherein the distance between the two component units 5 is 2 meters, a bamboo plywood and the component units 5 are placed in a 2 meter multiplied by 2.3 meter square frame to form a template, plain concrete is poured, and the plain concrete is used as a weight of a counterweight foundation to resist the load effect generated by a membrane surface. And the crane can be used for integral hoisting during disassembly, so that construction waste is not generated.
As shown in fig. 4, the air bearing film 1 and the steel cable net 3 are connected with the counterweight foundation structure 2 through a C-shaped piece 7, the C-shaped piece 7 is made of channel steel, and the C-shaped piece 7 is arranged along the side of the counterweight foundation structure 2 in a through length manner; the upper surface and the lower surface of the top of the C-shaped piece 7 are respectively and detachably connected with a rubber plate 8 and a clamping plate 9 in sequence; the bottom end of the air bearing film 1 and the end part of the steel cable are connected between the upper surface of the top of the C-shaped piece 7 and the rubber plate 8, wherein the connection length of the steel cable is determined by the arc length of the height to be limited after the air bearing film 1 is inflated; the bottom of the C-shaped part 7 and the top surface of the concrete are poured with embedded parts 6 which are detachably connected; the embedded part 6 is arranged at the edge of the upper surface of the concrete and at the side of the frame structure, and the embedded part 6 is a square steel plate with bolt holes.
As shown in fig. 5 and fig. 6, the two connection modes of the air bearing film 1 and the counterweight foundation structure 2 are provided, wherein the first connection mode is that the bottom end around the air bearing film 1 is connected with the inner side of the counterweight foundation structure 2 close to the foundation pit, and the second connection mode is that the bottom end around the air bearing film 1 is connected with the outer side of the counterweight foundation structure 2.
As shown in fig. 7, a fan system 11 is further connected to the outer side of the air bearing film 1 in the first connection mode, the fan system 11 comprises a blower and an exhaust fan, the blower and the exhaust fan are distributed at intervals and are mounted on the counterweight foundation structure 2, a connection port is formed in the air bearing film 1 corresponding to the fan system 11, and an activated carbon air purifier is connected to the fan system 11 in an inscription mode; as shown in fig. 6, a support system 10 is connected between the interior of the air-bearing membrane 1 and the counterweight foundation structure 2 in the second connection mode, and the support system 10 includes a set of arc rods arranged at intervals up and down along the radian direction of the air-bearing membrane 1, and a set of vertical rods connected between the arc rods and the counterweight foundation structure 2, and horizontal rods and diagonal rods connected between the vertical rods, wherein the arc rods, the vertical rods, the horizontal rods and the diagonal rods are formed by processing steel materials.
In this embodiment, an arched truss is erected on a counterweight foundation structure 2 inside the air bearing film 1, and a spraying system, a lighting system, a temperature detection system and a door and window system corresponding to the construction road and the personnel access setting outside the foundation pit on the air bearing film 1 are installed on the arched truss, wherein the fan system 11, the spraying system, the lighting system, the temperature control system and the door and window system can be automatically controlled. When the concentration reaches a set value (the maximum allowable concentration of CO is 30mg/m for 8 hours in continuous contact in a workshop is regulated by industrial enterprise design sanitation standard), a signal is sent by a terminal computer of detection equipment, finally, a terminal automatic control system sends out an instruction, an exhaust valve automatically carries out exhaust, an air filtering system carries out HEPA filtration, and the air with severe pollution (PM 2.5 reaches 400) can be processed to excellent air (PM 2.5 does not exceed 30) by combining technical means such as infrared sterilization, electrostatic absorption, an ion generator and the like; meanwhile, the pressure sensor starts the fan to perform blowing air supplement and pressure supplement, and finally scientific and organized emission of automobile exhaust in the operation area is realized. The intelligent air supply and exhaust system is arranged, so that the air quality in the membrane structure and the air quality in the exhaust can be effectively controlled; and (3) using an air filtration treatment purifier, adsorbing waste gas through activated carbon to perform air purification, and exchanging with air outside the membrane after reaching the standard.
Referring to fig. 1 to 7, a construction method for a foundation pit operation air bearing membrane system is further described, and specific steps are as follows:
step one, determining that the counterweight foundation structures 2 on the north side and the east side of a construction site are 5 meters high, the heights of the south side and the west side are 0.75 meter high, the widths of the frame structures are 2.3 meters, the pouring heights of counterweight foundation concrete on the north side and the east side of the construction site are 0.8 meter, and the pouring heights of counterweight foundation concrete on the south side and the west side are 0.75 meter according to the size of a foundation pit and by combining the stress effect of the air bearing membrane 1. The weight material of the weight foundation structure 2 is C10 cast-in-situ commercial concrete, the width of the concrete is unified to be 2.3 meters, and the weight material is uniformly divided into 2 meters.
Step two, erecting the longitudinal rods 4, and installing member units 5 at intervals in the longitudinal rods 4, wherein the adjacent longitudinal rods 4 are connected by flanges, sleeves or bolts, positioning the frame structure on a construction site, hoisting the frame structure to corresponding installation positions by using an automobile crane, carrying out reliable temporary support, sequentially installing, installing sequentially, supporting concrete templates according to a counterweight foundation frame structure, only supporting side templates, adopting a wood template, casting concrete on site, casting by adopting multiple working surfaces, embedding hoisting rings, arranging embedded parts 6 and C-shaped parts 7 on the upper surface of the concrete, and simultaneously casting multiple sections of concrete.
Step three, cleaning the air bearing film 1 in a covered field, wherein the field surface is flat and has no exposed convex sharp corner part; checking the number of the air bearing films 1 transported to the site, numbering the air bearing films 1 and confirming the installation position; the construction site is divided into assembly areas, marked by striking red lines, and the accurate positions are determined and form a one-to-one correspondence with the air bearing membrane 1.
Hoisting the air bearing film 1 to a corresponding field area by using an automobile crane respectively, and opening the air bearing film 1 according to the marking direction on the package; stretching anchor points are arranged on the short boundary of the air bearing film 1 every 2 meters, and the film is unfolded in a winch-assisted mode by adopting manual rolling.
Fifthly, fixing the boundary of the air bearing film 1 by using a tool after the air bearing film 1 is connected and installed, lifting the boundary of the air bearing film 1 to a connecting position corresponding to the counterweight foundation structure 2 and connecting the boundary of the air bearing film 1 to the C-shaped piece 7, and finishing the fixation of the boundary of the air bearing film 1 for a circle according to an installation plan; wherein for one side of the design fan system 11 installation location, the air bearing membrane 1 is connected with the counterweight foundation structure 2 by a first connection mode, and the other side is connected with the counterweight foundation structure 2 by a second connection mode, and the support system 10 is supported.
Step six, after the air bearing membrane 1 is installed on the ground, a protective film is paved on the membrane surface corresponding to the assembly position of the steel cable net 3, and the transverse steel cable and the longitudinal steel cable are sequentially connected on the C-shaped piece 7, wherein the steel cable and the embedded piece 6 are respectively numbered and identified, and are in one-to-one correspondence, and the steel cable is sequentially placed according to the number identified on the steel cable and the embedded piece 6 and is installed in place to form the steel cable net 3.
Step seven, processing the air bearing film 1 according to the design size, installing a door lock, installing an explosion-proof observation window, inflating and forming the air bearing film 1, adjusting the function and the air tightness of the door, installing automatic control equipment, a fan system 11, a spraying system, a lighting system, a temperature control system and the like, checking and positioning equipment one by one, checking equipment unpacking, checking equipment and tools, hoisting equipment in place, wiring equipment, and checking and accepting equipment debugging.
It is to be understood that the above examples are presented solely for the purpose of clearly illustrating the salient features of the present invention and are not intended to limit the scope of the present invention; other variations and modifications of the present invention will be apparent to those of skill in the art, and it is intended to cover all such modifications and variations of this invention without departing from the scope of the invention as defined by the appended claims.
Claims (4)
1. The construction method for the foundation pit operation air bearing membrane system comprises a hemispherical air bearing membrane (1) at the upper part of the foundation pit, and is characterized in that: the outer side surface of the air bearing film (1) is provided with a steel cable net (3), and the peripheral end parts of the air bearing film (1) and the steel cable net (3) are connected with a counterweight foundation structure (2); the counterweight foundation structure (2) is circumferentially arranged around the foundation pit;
the counterweight foundation structure (2) is formed by splicing sections and comprises a frame structure and concrete poured in the frame structure, wherein the frame structure comprises four longitudinal rods (4) and a group of detachably connected member units (5) which are connected on the longitudinal rods (4) at intervals in parallel, and the longitudinal rods (4) of adjacent frame structures are detachably connected in a flange, sleeve or bolt connection mode; the member unit (5) is rectangular and comprises a pair of horizontal rods, a pair of vertical rods and a diagonal rod connected at the intersection point of the horizontal rods and the diagonal rod, wherein a template is supported at the inner side of a square frame enclosed by the longitudinal rods (4) and the member unit (5);
the air bearing film (1) and the steel cable net (3) are connected with the counterweight foundation structure (2) through C-shaped pieces (7), and the C-shaped pieces (7) are arranged along the side of the counterweight foundation structure (2) in a through length mode;
the upper surface and the lower surface of the top of the C-shaped piece (7) are respectively and detachably connected with a rubber plate (8) and a clamping plate (9) in sequence; the bottom end of the air bearing film (1) and the end part of the steel cable are connected between the upper surface of the top of the C-shaped piece (7) and the rubber plate (8), wherein the connection length of the steel cable is determined by the arc length of the height to be limited after the air bearing film (1) is inflated;
the air bearing membrane (1) and the counterweight foundation structure (2) are connected in two modes, wherein the first mode is that the bottom end around the air bearing membrane (1) is connected with the inner side of the counterweight foundation structure (2) close to a foundation pit, and the second mode is that the bottom end around the air bearing membrane (1) is connected with the outer side of the counterweight foundation structure (2);
a supporting system (10) is connected between the inside of the air bearing film (1) and the counterweight foundation structure (2) in a second connecting mode, and the supporting system (10) comprises a group of arc rods which are arranged at intervals up and down along the radian direction of the air bearing film (1), and a group of vertical rods which are connected with the arc rods and the counterweight foundation structure (2), and horizontal rods and diagonal rods which are connected with each other;
the construction method for the foundation pit operation air bearing membrane system comprises the following specific steps:
step one, determining the number of sections of a counterweight foundation structure (2) according to the size of a foundation pit, and determining the length, width and height of each section of frame structure and the number of used poured concrete by combining the stress effect of an air bearing film (1); then, erecting the longitudinal rods (4), and installing component units (5) at intervals in the longitudinal rods (4), wherein the adjacent longitudinal rods (4) are connected by flanges, sleeves or bolts;
step two, supporting the template at the side of the frame structure, casting concrete in sections, and embedding a hoisting ring on the side surface of the concrete in advance; the upper surface of the concrete is provided with an embedded part (6) and a C-shaped part (7), wherein the casting of the concrete in multiple sections can be performed simultaneously;
step three, cleaning the air bearing film (1) covered in the field, wherein the surface of the field is flat and has no exposed convex sharp corner part; checking the number of the air bearing films (1) transported to the site, numbering the films (1), confirming the installation position, dividing the assembly area on the site, marking by using a striking red line, confirming the accurate position, and forming a one-to-one correspondence with the air bearing films (1);
hoisting the air bearing film (1) to a corresponding field area respectively, and opening the air bearing film (1) according to the marking direction on the package; a tensioning anchor point is arranged on the short boundary of the air bearing film (1), and the air bearing film (1) is unfolded in a manual turning and winding machine auxiliary mode; then, the clamping plate (9) and the rubber plate (8) are sequentially arranged on the edge of the membrane;
step five, lifting the boundary of the air bearing film (1) to a connecting position corresponding to the counterweight foundation structure (2) and connecting the boundary to the C-shaped piece (7), and finishing the fixation of the boundary of the air bearing film (1) in a circle according to an installation plan; wherein, for one side of the installation position of the design fan system (11), the air bearing film (1) is connected with the counterweight foundation structure (2) by a first connection mode, and the other sides are connected with the counterweight foundation structure (2) by a second connection mode, and the support system (10) is supported;
step six, after the ground installation of the main body air bearing film (1) is completed, paving a protective film on a film surface corresponding to the assembly position of the steel cable net (3), and sequentially connecting transverse and longitudinal steel cables on the C-shaped piece (7), wherein the steel cables and the embedded pieces (6) are respectively numbered and identified, and are in one-to-one correspondence, and the steel cables are sequentially placed and installed in place according to the numbers identified on the steel cables and the embedded pieces (6) to form the steel cable net (3);
step seven, processing the upper door frame of the air bearing film (1) according to the design size, debugging the door lock, installing an explosion-proof observation window, inflating the air bearing film (1) to form, debugging the function and the air tightness of the door, installing automatic control equipment, a fan system (11), a spraying system, a lighting system and a temperature control system, and debugging and checking one by one.
2. The construction method for the foundation pit operation air bearing membrane system according to claim 1, wherein the construction method comprises the following steps: an embedded part (6) which is detachably connected is poured in the bottom of the C-shaped part (7) and the top surface of the concrete; the embedded part (6) is arranged at the edge of the upper surface of the concrete and at the side of the frame structure.
3. The construction method for the foundation pit operation air bearing membrane system according to claim 1, wherein the construction method comprises the following steps: the novel air bearing membrane is characterized in that a fan system (11) is further connected to the outer side of the air bearing membrane (1) in a first connecting mode, the fan system (11) comprises a blower and an exhaust fan, the blower and the exhaust fan are distributed at intervals and are arranged on the counterweight foundation structure (2), a connecting port is formed in the air bearing membrane (1) corresponding to the fan system (11), and an activated carbon air purifier is inscribed in the fan system (11).
4. The construction method for the foundation pit operation air bearing membrane system according to claim 1, wherein the construction method comprises the following steps: the air bearing film also comprises a spraying system, a lighting system and a temperature detection system inside the air bearing film (1), and a door and window system arranged on the air bearing film (1), wherein the fan system (11), the spraying system, the lighting system, the temperature control system and the door and window system can be automatically controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811632370.1A CN109853974B (en) | 2018-12-29 | 2018-12-29 | Air bearing membrane system for foundation pit operation and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686818A (en) * | 1968-11-21 | 1972-08-29 | Dante Bini | Expandible reinforcement structure for inflatable domes |
| CN102995749A (en) * | 2012-12-13 | 2013-03-27 | 上海交通大学 | Air bearing-air rib combined type film structure |
| CN205160572U (en) * | 2015-11-13 | 2016-04-13 | 宿迁通宝莱智能科技有限公司 | Networking of accurate visual thing system for agricultural |
| CN206829361U (en) * | 2017-03-22 | 2018-01-02 | 河南省科琦游乐设备有限公司 | A kind of counter weight device of removable air-supported membrane structures |
| CN107599137A (en) * | 2017-10-18 | 2018-01-19 | 中建科技（北京）有限公司 | Collapsible mould component and its construction method |
| CN207296582U (en) * | 2017-06-11 | 2018-05-01 | 深圳市中兰环保科技股份有限公司 | A kind of dangerous waste thing keeps in sealing system |
| CN108277885A (en) * | 2018-04-08 | 2018-07-13 | 北京工业大学 | A kind of floating gas rib Compound Water pillow air-supported membrane structure arrangement and method for construction |
-
2018
- 2018-12-29 CN CN201811632370.1A patent/CN109853974B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686818A (en) * | 1968-11-21 | 1972-08-29 | Dante Bini | Expandible reinforcement structure for inflatable domes |
| CN102995749A (en) * | 2012-12-13 | 2013-03-27 | 上海交通大学 | Air bearing-air rib combined type film structure |
| CN205160572U (en) * | 2015-11-13 | 2016-04-13 | 宿迁通宝莱智能科技有限公司 | Networking of accurate visual thing system for agricultural |
| CN206829361U (en) * | 2017-03-22 | 2018-01-02 | 河南省科琦游乐设备有限公司 | A kind of counter weight device of removable air-supported membrane structures |
| CN207296582U (en) * | 2017-06-11 | 2018-05-01 | 深圳市中兰环保科技股份有限公司 | A kind of dangerous waste thing keeps in sealing system |
| CN107599137A (en) * | 2017-10-18 | 2018-01-19 | 中建科技（北京）有限公司 | Collapsible mould component and its construction method |
| CN108277885A (en) * | 2018-04-08 | 2018-07-13 | 北京工业大学 | A kind of floating gas rib Compound Water pillow air-supported membrane structure arrangement and method for construction |
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| CN109853974A (en) | 2019-06-07 |
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