CN116517024A - Construction method of underground frame structure - Google Patents

Abstract

The invention relates to a construction method of an underground frame structure, which comprises the following steps: preparing construction; constructing a support system; basin-type region excavation; constructing a pile foundation bearing platform; constructing a water collecting well; constructing a foundation slab and a supporting upright post; constructing a bottom plate by chamfering the axillary angle; constructing a side wall single-side template system; constructing a deformation adjustable concrete horizontal support; excavating a back pressure area; the second steel support construction; constructing a slope bottom plate; and (5) constructing a post-cast strip independent formwork system. The invention adopts the deformation adjustable concrete horizontal support, the bottom plate chamfer template mounting stabilizing system and the post-pouring strip independent formwork supporting system, is suitable for large-scale building engineering construction with deeper depth and large area, improves the construction efficiency, shortens the construction period, can effectively control the stability of a side slope and the soil retaining counter pressure, ensures the safety and stability in the foundation pit construction process, and has wide application prospect.

Description

Construction method of underground frame structure

Technical Field

The invention belongs to the field of civil engineering, and particularly relates to a construction method of an underground frame structure, which is suitable for the construction of the underground frame structure, in particular to the construction of large-scale building engineering with deeper depth and large area.

Background

In urban construction, along with the acceleration of the urban process, more and more high-rise buildings, underground garages and other buildings need to be built, the investment of the country to the infrastructure is continuously increased, so that the land used for the ground buildings in the city is tension, the requirements of the urban construction to the underground space are continuously expanded and extended, and the construction of the buildings is not separated from the excavation and the support of the foundation pit. The basin-type excavation system is a commonly used foundation pit supporting system, can effectively control the stability of a side slope and the back pressure of reserved soil, and ensures the safety and stability in the foundation pit construction process.

The basin-type excavation foundation pit underground main body structure comprises a side slope supporting system, an underground continuous wall, a foundation pit bottom plate and other components. The side slope support system is mainly used for supporting the side slope and preventing collapse and other accidents. The underground diaphragm wall is used for fixing soil mass and guaranteeing stability of the foundation pit. The foundation pit bottom plate is a horizontal structure positioned below the underground continuous wall, and the stability and bearing capacity of the foundation pit can be improved through measures such as reinforcement and thickening. The basin-type excavation foundation pit underground main body structure has the characteristics of simple structure, high construction efficiency, good stability and the like.

The construction method of the basin-type excavated foundation pit underground main body structure mainly comprises side slope support, construction of an underground continuous wall and construction of a foundation pit bottom plate. The slope support can adopt support systems such as piles, anchor rods and the like, so that the stability of the slope is ensured. The underground diaphragm wall can adopt structures such as reinforced concrete diaphragm wall or precast concrete slab wall, and the like, the soil body is fixed, and the stability of the foundation pit is ensured. The foundation pit bottom plate can adopt forms such as concrete pouring or precast concrete slab, and stability and bearing capacity of the foundation pit are improved through measures such as reinforcement and thickening. In the construction process, the surrounding environment factors, safety measures and the like are also required to be considered so as to ensure the safety and stability of construction.

Therefore, how to realize the safe construction of the underground frame structure is important, is a key system for site construction, and is a serious difficulty for the whole construction.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a construction method of an underground frame structure.

The construction method of the underground frame structure comprises the following steps:

firstly, constructing an underground diaphragm wall, engineering piles, guard piles and lattice columns, carrying out first-pass deformation adjustable concrete horizontal support construction, adopting basin-type excavation at a foundation slab, and excavating a two-stage slope-releasing central island at the inner side of the underground diaphragm wall;

splicing a prefabricated pile cap tire membrane at the top of the engineering pile, and pouring a pile foundation pile cap; installing an adjustable water collecting well opening template, supporting by using a recyclable inner supporting frame, and pouring a water collecting well;

step three, constructing a foundation slab and a supporting upright post in sequence;

installing a bottom plate chamfering template through a bottom plate chamfering template installation stabilizing system, and pouring a bottom plate chamfering angle; constructing a side wall through a side wall single-side template system;

fifthly, connecting the deformed adjustable concrete horizontal support with a top plate of a main body structure of the central island, and arranging sliding connectors on the side surfaces of the end parts of the deformed adjustable concrete horizontal support;

and step six, excavating earth of the back pressure area, constructing a second steel support, excavating back pressure soil, constructing a foundation slab, reserving a post-pouring belt through a post-pouring belt independent formwork system and pouring.

Preferably, in the first step: the top of the underground continuous wall is provided with a crown beam, and the middle of the underground continuous wall is provided with a waist beam; firstly, carrying out circumferential stirrup and longitudinal main reinforcement binding of a structural top plate, wherein lattice columns are arranged at the top of a central island main body structure bottom plate, supporting plates are arranged at the tops of all layers of lattice columns, and a central island main body structure middle plate and a central island main body structure top plate are arranged on the supporting plates; the middle soil body of the foundation pit at the foundation bottom plate is excavated by adopting a basin, the soil body at the inner side of the underground diaphragm wall is inclined by adopting two stages, the back pressure soil is reserved, and the excavation of the soil body of the central island is completed.

Preferably, in the second step: the prefabricated bearing platform fetal membrane framework structure is formed by assembling a transverse long template, a longitudinal short template, a transverse short template and a longitudinal middle template;

binding a reinforcement cage of the water collecting well, installing an adjustable water collecting well opening template system at the water collecting well according to a design drawing, pouring the water collecting well, specifically, assembling an upper cross beam, a lower cross beam and a vertical connecting rod for a recyclable inner support frame, wherein the top of the water collecting well opening template is provided with a hanging ring, the hanging ring is connected with a steel wire rope, then installing the water collecting well opening template at the water collecting well needing pouring by using a crane, and installing the recyclable inner support frame in the water collecting well opening template;

in the second step, a vertical embedded screw, an oblique embedded screw and an embedded U-shaped straight thread steel are arranged at the top of the foundation slab

Preferably, in the fourth step: firstly binding reinforcement cages at the bottom plate inverted axillary angles, then installing a stabilizing system for the bottom plate chamfering template, then pouring the bottom plate inverted axillary angles, arranging pre-buried straight thread steel at the top of the bottom plate inverted axillary angles,

the bottom plate chamfering template mounting stabilizing system comprises a weight trapezoidal frame, a vertical supporting system, a vertical embedded screw and an oblique embedded screw; the vertical supporting system is used for supporting the ballast weight trapezoidal frame, a top supporting plate is arranged at the top of the vertical supporting system, and a bottom supporting plate is arranged at the bottom of the vertical supporting system; the side face of the weight trapezoid frame is provided with a weight trapezoid frame side plate, the bottom of the weight trapezoid frame is provided with a weight trapezoid frame pressing plate, and a jack is arranged below the upper end of the weight trapezoid frame pressing plate; the vertical embedded screw and the inclined embedded screw are embedded at the top of the foundation slab, and the vertical embedded screw penetrates through one end of the bottom supporting plate and is fixed by the top pressing beam; the oblique embedded screw rod penetrates through the lower ends of the bottom plate chamfering template and the pressing trapezoidal frame pressing plate and is pressed and fixed by the oblique pressing beam.

Preferably, in the fourth step: specifically, a bottom plate chamfering template is arranged at the side face of a bottom plate chamfering corner, a weight trapezoid frame is arranged at the top of the bottom plate chamfering template, and one end of the bottom plate chamfering template and one end of the weight trapezoid frame are fixed by utilizing oblique embedded screws; a vertical supporting system is arranged below the side of the ballast ladder frame, and a jack is adjusted to enable a supporting plate of the telescopic rod to be supported on a wall body; one end of a bottom supporting plate of the vertical supporting system is fixed by utilizing a vertical embedded screw rod, and a vertical supporting rod is arranged at the other end of the bottom supporting plate; the top of the bottom plate inverted axil angle is provided with pre-buried straight thread steel.

Preferably, in the fourth step: the side wall single-side template system comprises a bottom drawknot system, a rear adjusting supporting leg, a front adjusting supporting leg, pre-embedded straight thread steel, an outer connecting rod and a side wall steel template; the side wall steel template is provided with a tripod system, the tripod system comprises a frame picking platform, a standard joint tripod and a heightened joint tripod, the standard joint tripod and the heightened joint tripod are connected through bolts at the joint, and the frame picking platform is arranged on the side surface of the top of the standard joint tripod; the side wall steel template is provided with a groove vertical ridge and a groove main ridge on the side surface, and the groove main ridge is connected with a standard joint tripod and a heightened joint tripod by adopting template fasteners; a tripod system is formed by a frame picking platform, a standard joint tripod and a heightened joint tripod, a side wall steel template is connected with the tripod system by using a template fastener, and a side wall single-side template system is fixed by using pre-embedded straight thread steel and pre-embedded U-shaped straight thread steel.

Preferably, in the fifth step: the deformation adjustable concrete horizontal support is connected with the top plate of the central island main body structure and comprises a concrete support longitudinal main reinforcement and a concrete support circumferential stirrup; binding a concrete support longitudinal main rib and a concrete support circumferential stirrup, wherein the concrete support longitudinal main rib is connected with a structural roof longitudinal main rib through a connecting rib; the side surface of the end part of the deformed adjustable concrete horizontal support is connected with a fixed sliding connecting piece through a pre-buried bolt, and a support column is arranged below the deformed adjustable concrete horizontal support.

Preferably, in the sixth step: removing the back pressure soil to the lower part of the second steel support, constructing the second steel support, and removing the back pressure soil to the designed elevation of the foundation slab after the second steel support forms strength; two ends of the second steel support are respectively connected with the waist beam, and a support upright post is arranged below the second steel support;

the slope foundation slab is a slope foundation slab, when the slope foundation slab is constructed, a large-slope support slope adjusting system is firstly erected, the large-slope support slope adjusting system comprises a unit slope adjusting support, the unit slope adjusting support comprises a vertical steel pipe and a horizontal steel pipe, the top of the vertical steel pipe is provided with a top adjusting supporting plate, the bottom of the vertical steel pipe is provided with a bottom adjusting supporting plate, and a slope foundation slab template is arranged above the top adjusting supporting plate; specifically, a unit slope adjusting bracket is formed by splicing a vertical steel pipe and a horizontal steel pipe, and the slope is adjusted through a bottom adjusting backing plate and a top adjusting supporting plate.

Preferably, in the sixth step: when a foundation slab is constructed, a post-cast strip is required to be reserved, the construction is realized through a post-cast strip independent formwork system, the post-cast strip independent formwork system comprises a profile steel-steel plate combined post-cast strip temporary sealing device, a post-cast strip formwork system and a top plate bottom die, the profile steel-steel plate combined post-cast strip temporary sealing device comprises steel plates, profile steel, connecting screws and transverse rods, the steel plates are supported between structural top plates on two sides of the post-cast strip, the profile steel and the transverse rods are supported between the steel plates, gaps between the profile steel and the steel plates are filled by pressing plates, the profile steel is arranged at the top of the connecting screws, and the post-cast strip formwork system is supported at the bottom of the top plate bottom die;

specifically, a steel plate-steel plate combined post-pouring strip temporary sealing device is formed by splicing plates, steel plates, connecting screws and transverse rods, and then the steel plate combined post-pouring strip temporary sealing device is arranged at a reserved post-pouring strip; after the foundation slab is constructed, the section steel-steel plate combined post-cast strip temporary sealing device is removed, and then the post-cast strip is poured, specifically, the pressing plate is removed firstly, and then the connecting screw rod and the transverse rod are removed.

An underground frame structure obtainable by any of the methods described above.

The beneficial effects of the invention are as follows:

1) According to the invention, the deformation-adjustable concrete horizontal support is adopted, the concrete support is connected with the top plate of the central island by adopting the deformation-adjustable connecting piece, the deformation adjustment can be realized through the deformation control piece, the structure is safe, and the deformation of the bottom plate of the foundation pit is reduced.

2) The invention adopts a bottom plate chamfering template mounting stabilizing system, realizes the supporting of the template by utilizing an anchor pulling-pressing weight combination mode, solves the construction problem of the bottom plate chamfering template, and effectively ensures the construction quality of the structure.

3) The post-cast strip independent formwork system adopts the section steel-steel plate combined post-cast strip temporary sealing device, effectively ensures the construction quality of the post-cast strip and has obvious economic benefit.

4) The invention adopts an adjustable water collecting well opening template system and adopts the inner supporting frame recoverable template, so that the structure is simple, the template turnover efficiency is high, and the construction efficiency is greatly improved.

5) According to the invention, a side wall single-side template system is adopted, and the tripod is adopted to reinforce and strengthen the steel template, so that the safe construction of the template is ensured, the pouring quality of the side wall is effectively ensured, and the water seepage of a basement is effectively reduced.

6) According to the invention, a large-gradient support slope adjusting system is adopted, the gradient is adjusted by utilizing the top and bottom supporting plates of the steel pipe support, the construction is convenient, and the construction efficiency is greatly improved.

7) The invention adopts the prefabricated bearing platform tire membrane construction system and adopts the external quick connecting assembly to realize the quick splicing of the prefabricated bearing platform tire membrane, thereby ensuring the construction quality and having high construction efficiency.

Drawings

FIG. 1 is a schematic illustration of a concrete support connected to a center island roof;

FIG. 2 is a schematic view of an underground frame structure and construction;

FIG. 3 is an elevation view of a sliding connection;

FIG. 4 is a detailed construction view of the top plate connector;

FIG. 5 is a three-dimensional schematic view of a slip joint;

FIG. 6 is a schematic diagram of a floor chamfer form mounting stabilization system;

FIG. 7 is a detail block diagram of a stabilization system;

FIG. 8 is a schematic diagram of a side wall single-sided template system;

FIG. 9 is a detail view of the bottom embedment;

FIG. 10 is a detail view of the chamfer embedded part;

FIG. 11 is a schematic view of a tripod steel form;

FIG. 12 is a schematic illustration of a heavy grade stand slope adjustment construction;

FIG. 13 is a schematic illustration of an adjustable water collection well portal template system construction;

FIG. 14 is a view of the construction of the inner strut recoverable form;

FIG. 15 is a schematic construction diagram of a post-cast strip independent formwork system;

FIG. 16 is a block diagram of a section steel-sheet combined post-pouring strip temporary closure;

FIG. 17 is a three-dimensional view of a prefabricated cap fetal membrane;

FIG. 18 is a plan view of a prefabricated cap tire membrane;

FIG. 19 is a three-dimensional view of prefabricated cap fetal membrane assembly;

FIG. 20 is a three-dimensional view of prefabricated cap fetal membrane assembly;

FIG. 21 is a schematic plan view of a slip connector;

FIG. 22 is a three-dimensional view of an extra-membrane connector;

fig. 23 is a three-dimensional view of an intra-membrane connector.

In the figure: 1-structural roof, 2-underground diaphragm wall, 3-engineering pile, 4-foundation slab, 5-water collecting well, 6-guard pile, 7-central island main structure roof, 8-lattice column, 9-second steel support, 10-deformation adjustable concrete horizontal support, 11-embedded steel plate, 12-central island main structure floor, 13-central island main structure middle plate, 14-crown beam, 15-waist beam, 16-concrete support longitudinal main rib, 17-concrete support circumferential stirrup, 18-connecting rib, 19-supporting column, 20-embedded bolt, 21-nut, 22-sliding connecting piece, 23-structural roof circumferential stirrup, 24-structural roof longitudinal main rib, 25-bearing plate, and 26-preformed hole, 27-sliding groove, 28-sliding spring, 29-jack, 30-telescopic rod, 31-ballast ladder pressing plate, 32-ballast ladder, 33-ballast ladder side plate, 34-top supporting plate, 35-top pressing beam, 36-vertical supporting system, 37-bottom supporting plate, 38-vertical supporting rod, 39-vertical pre-embedded screw, 40-oblique pre-embedded screw, 41-bottom plate chamfering template, 42-bottom plate chamfering angle, 43-supporting plate, 44-side wall, 45-oblique pressing beam, 46-cantilever platform, 47-standard joint tripod, 48-bolt, 49-heightening joint tripod, 50-bottom drawknot system, 51-post-adjusting supporting leg, 52-H section steel, 53-front adjusting support leg, 54-pre-embedded straight thread steel, 55-connecting nut, 56-pressure beam, 57-casting gasket, 58-butterfly nut, 59-outer connecting rod, 60-template fastener, 61-side wall steel template, 62-groove vertical ridge, 63-groove main ridge, 64-embedded U-shaped straight thread steel, 65-connecting steel piece, 66-vertical pressure beam, 67-gasket, 68-pressure butterfly nut, 69-connecting rod, 70-water collecting well opening template, 71-hanging ring, 72-upper cross beam, 73-lower cross beam, 74-vertical connecting rod, 75-pressing plate, 76-steel plate, 77-shaped steel, 78-connecting screw, 79-fixing bolt, 80-fixing nut, 81-post-pouring belt system, 82-transverse rod, 83-top plate bottom die block, 84-slope bottom plate, 85-unit slope adjusting support, 86-vertical steel pipe, 87-bottom adjusting base plate template, 89-top adjusting template, 90-transverse long template, 91-longitudinal long pile foundation template, 92-prefabricated screw fixing member, 93-fixing screw, 94-outer support frame, 95-short support frame, 96-base plate, vertical support frame, 103-base plate, vertical support frame, 101-base plate, vertical support frame, and three-base plate system, and three-bottom plate system, and the like.

Detailed Description

The invention is further described below with reference to examples. The following examples are presented only to aid in the understanding of the invention. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present invention without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Example 1

As an embodiment, the construction method of the underground frame structure includes the following steps:

step one, construction preparation: pre-buried steel plates 11, sliding connectors 22, standard joint tripods 47, heightened joint tripods 49, side wall steel templates 61, profile steel 77-steel plates 76 are customized in a factory in advance to form a post-pouring belt temporary sealing device, and meanwhile, a weight-bearing trapezoid frame 32, a bottom plate chamfering template 41, an adjustable water collecting well opening template 70 and a prefabricated bearing platform tire membrane 92 are manufactured;

and (3) constructing a support system: constructing the underground diaphragm wall 2, the engineering piles 3, the guard piles 6, the lattice columns 8 and the like of the large foundation pit, simultaneously constructing the first deformation adjustable concrete horizontal support 10, arranging a crown beam 14 at the top of the underground diaphragm wall 2, and arranging a waist beam 15 in the middle of the underground diaphragm wall 2; firstly, binding a structural top plate circumferential stirrup 23 and a structural top plate longitudinal main stirrup 24, arranging lattice columns 8 on the top of a central island main structure bottom plate 12, arranging a bearing plate 25 on the top of each layer of lattice columns 8, and arranging a central island main structure middle plate 13 and a central island main structure top plate 7 on the bearing plate 25;

basin-type region excavation: the middle soil body of the foundation pit at the foundation bottom plate 4 is excavated by adopting a basin, the soil body at the inner side of the underground diaphragm wall 2 is inclined by adopting two stages, counter-pressure soil is reserved, and the excavation of the soil body of the central island is completed;

step two, pile foundation bearing platform construction: firstly binding reinforcement cages of a pile foundation bearing platform 101, splicing a prefabricated bearing platform fetal membrane 92 at the pile foundation bearing platform 101 at the top of an engineering pile 3, and pouring the pile foundation bearing platform 101, wherein a transverse long template 90, a longitudinal long template 91, a longitudinal short template 95, a transverse short template 97 and a longitudinal middle template 98 are spliced to form a prefabricated bearing platform fetal membrane 92 skeleton structure;

and (3) construction of a water collecting well: firstly binding a reinforcement cage of a water collecting well 5, installing an adjustable water collecting well opening template 70 system at the water collecting well 5 according to a design drawing, pouring the water collecting well 5, specifically, splicing an upper cross beam 72, a lower cross beam 73 and a vertical connecting rod 74 into a recyclable inner support, connecting a lifting ring 71 with a steel wire rope, installing the water collecting well opening template 70 at the water collecting well 5 needing pouring by using a crane, and installing the recyclable inner support in the water collecting well opening template 70;

thirdly, constructing a foundation slab and a supporting column: firstly binding reinforcement cages of the foundation slab 4 and the supporting upright posts 19, firstly constructing the foundation slab 4, then constructing the supporting upright posts 19, and arranging a vertical embedded screw 39, an inclined embedded screw 40 and an embedded U-shaped straight thread steel 64 at the top of the foundation slab 4;

fourthly, constructing a bottom plate by chamfering the axillary angle: firstly binding reinforcement cages at the bottom plate chamfering angle 42, then installing a stabilizing system for the bottom plate chamfering template 41, then pouring the bottom plate chamfering angle 42, arranging pre-buried straight thread steel 54 at the top of the bottom plate chamfering angle 42, specifically, installing the bottom plate chamfering template 41 at the side surface of the bottom plate chamfering angle 42, installing a ballast ladder frame 32 at the top of the bottom plate chamfering template 41, and fixing one end of the bottom plate chamfering template 41 and one end of the ballast ladder frame 32 by utilizing an inclined pre-buried screw rod 40; a vertical supporting system 36 is arranged below the side of the ballast weight ladder frame 32, and the jack 29 is adjusted so that the supporting plate 43 of the telescopic rod 30 is supported on the wall body; one end of a bottom supporting plate 37 of the vertical supporting system 36 is fixed by utilizing a vertical embedded screw 39, and a vertical supporting rod 38 is arranged at the other end of the bottom supporting plate 37;

and (3) constructing a side wall single-side template system: firstly binding a reinforcement cage at the side wall 44, then constructing a single-side template system of the side wall 44, and then pouring the side wall 44, specifically, forming a tripod system by using a cantilever platform 46, a standard joint tripod 47 and a heightened joint tripod 49, connecting a side wall steel template 61 with the tripod system by using a template fastener 60, and fixing the single-side template system of the side wall 44 by using pre-embedded straight thread steel 54 and pre-embedded U-shaped straight thread steel 64;

fifthly, constructing the deformation-adjustable concrete horizontal support: after the main body structure of the central island part is completed, connecting the deformation-adjustable concrete horizontal support 10 on the back pressure soil with the top plate 7 of the main body structure of the central island, binding the concrete support longitudinal main ribs 16 and the concrete support circumferential stirrups 17, and connecting the concrete support longitudinal main ribs 16 with the longitudinal main ribs 24 of the top plate of the structure through connecting ribs 18; the side surface of the end part of the deformation-adjustable concrete horizontal support 10 is provided with an embedded bolt 20, a sliding connecting piece 22 is connected and fixed with the embedded bolt 20, and a support upright post 19 is arranged below the deformation-adjustable concrete horizontal support 10;

step six, excavating a back pressure area: excavating earth of the back pressure area to the lower part of the second steel support 9, constructing the second steel support 9, and excavating the back pressure soil to the substrate elevation after the second steel support 9 is stressed, so as to start construction of the main structure of the back pressure area;

and (3) carrying out second steel support construction: removing the back pressure soil to the lower part of the second steel support 9, constructing the second steel support 9, and removing the back pressure soil to the design elevation of the foundation pit after the second steel support 9 forms strength; two ends of the second steel support 9 are respectively connected with the waist beam 15, and a support upright post 19 is arranged below the second steel support 9;

slope bottom plate construction: when constructing the foundation slab 4 with the gradient, firstly building a large-gradient support gradient adjusting system, specifically, utilizing a vertical steel pipe 86 and a horizontal steel pipe to assemble a unit gradient adjusting support 85, and adjusting the gradient through a bottom adjusting backing plate 87 and a top adjusting supporting plate 89;

and (3) constructing a post-cast strip independent formwork system: when the foundation slab 4 is constructed, a post-cast strip is required to be reserved and is realized through a post-cast strip independent formwork system 105, specifically, a plate 76, a section steel 77, a connecting screw 78 and a transverse rod 82 are assembled to form a section steel-steel plate combined post-cast strip temporary sealing device, and then the section steel-steel plate combined post-cast strip temporary sealing device is arranged at the reserved post-cast strip; after the foundation slab 4 is constructed, the section steel-steel plate combined post-cast strip temporary sealing device is removed, and then the post-cast strip is poured, specifically, the pressing plate 75 is removed, and then the connecting screw 78 and the transverse rod 82 are removed.

Example two

As another embodiment, the underground frame structure obtained by the method set forth in the first embodiment, as shown in fig. 1 to 23, includes: the construction roof 1, the underground diaphragm wall 2, the engineering piles 3, the foundation bottom plate 4, the water collecting well 5, the guard piles 6, the central island main structure roof 7, the lattice column 8, the second steel support 9, the deformation adjustable concrete horizontal support 10, the embedded steel plate 11, the central island main structure bottom plate 12, the central island main structure middle plate 13, the crown beam 14, the waist beam 15, the concrete support longitudinal main rib 16, the concrete support circumferential stirrup 17, the connecting rib 18, the support upright 19, the embedded bolt 20, the nut 21, the sliding connection piece 22, the construction roof circumferential stirrup 23, the construction roof longitudinal main rib 24, the bearing plate 25, the preformed hole 26, the sliding groove 27, the sliding spring 28, the jack 29, the telescopic rod 30, the pressing ladder-shaped frame pressing plate, the pressing ladder-shaped frame 32, the pressing ladder-shaped frame side plate 33, the top support plate 34, the top pressing beam 35, the vertical support system 36, the bottom support plate 37 vertical support bar 38, vertical pre-embedded screw 39, oblique pre-embedded screw 40, bottom plate chamfer template 41, bottom plate undercut angle 42, pallet 43, side wall 44, oblique press beam 45, cantilever platform 46, standard joint tripod 47, bolt 48, heightened joint tripod 49, bottom drawknot system 50, rear adjustment leg 51, H-section steel 52, front adjustment leg 53, pre-embedded straight threaded steel 54, connecting nut 55, press beam 56, cast spacer 57, butterfly nut 58, outer connecting rod 59, template fastener 60, side wall steel template 61, groove vertical ridge 62, groove main ridge 63, pre-embedded U-shaped straight threaded steel 64, connecting steel 65, vertical press beam 66, spacer 67, press-fixing butterfly nut 68, connecting rod 69, water collecting well opening template 70, lifting ring 71, upper cross beam 72, lower cross beam 73, vertical connecting rod 74, press plate 75, steel plate 76, section steel 77, connecting screw 78, fixing bolt 79, cross beam 73, the post-cast strip die set system 81, the transverse rod 82, the top plate bottom die 83, the slope bottom plate 84, the unit slope adjusting bracket 85, the vertical steel pipe 86, the bottom adjusting base plate 87, the slope bottom plate die plate 88, the top adjusting supporting plate 89, the transverse long die plate 90, the longitudinal long die plate 91, the prefabricated bearing platform tire membrane 92, the fixing screw 93, the outer connecting piece 94, the longitudinal short die plate 95, the screw 96, the transverse short die plate 97, the longitudinal middle die plate 98, the inner connecting piece 99, the connecting piece preformed hole 100, the pile foundation bearing platform 101, the bottom base 102, the lower nut 103, the upper nut 104, the post-cast strip independent die set system 105 and the tripod bottom plate 106;

the construction of the underground frame structure adopts a deformation adjustable concrete horizontal support 10, a bottom plate chamfer template mounting stabilizing system, a post-pouring belt independent formwork supporting system 105, an adjustable water collecting well opening template system, a side wall single-side template system, a heavy gradient bracket slope adjusting system and a prefabricated bearing platform moulding bed construction system;

the deformation-adjustable concrete horizontal support 10 is arranged between the crown beam 14 and the central island main body structure top plate 7, an embedded bolt 20 is arranged in the center of the end part of the deformation-adjustable concrete horizontal support 10, and the embedded bolt 20 is connected with a sliding connecting piece 22 and is fixed by a nut 21; the sliding connecting piece 22 is arranged near the top end part of the embedded steel plate 11, and the embedded steel plate 11 is arranged in the center of the top plate 7 of the central island main body structure; the top end of the embedded steel plate 11 is provided with a sliding groove 27, a sliding connecting piece 22 is arranged in the sliding groove 27, a sliding spring 28 is arranged between the sliding connecting piece 22 and the sliding groove 27, a plurality of through preformed holes 26 are formed in the side face of the sliding connecting piece 22, and the embedded bolts 20 penetrate through the preformed holes 26.

The base plate chamfer template mounting and stabilizing system is used for reinforcing the base plate chamfer template 41 at the base plate chamfer angle 42 and mainly comprises a jack 29, a ballast ladder frame 32, a vertical supporting system 36, a vertical embedded screw 39 and an oblique embedded screw 40; the vertical supporting system 36 is used for supporting the ballast weight ladder frame 32, the top of the vertical supporting system 36 is provided with a top supporting plate 34, and the bottom of the vertical supporting system 36 is provided with a bottom supporting plate 37; the side of the weight trapezoid frame 32 is provided with a weight trapezoid frame side plate 33, the bottom of the weight trapezoid frame 32 is provided with a weight trapezoid frame pressing plate 31, and a jack 29 is arranged below the upper end of the weight trapezoid frame pressing plate 31; the vertical embedded screw 39 and the inclined embedded screw 40 are embedded at the top of the foundation bedplate 4, and the vertical embedded screw 39 passes through one end of the bottom supporting plate 37 and is fixed by the top pressing beam 35; the oblique embedded screw rod 40 penetrates through the bottom plate chamfering template 41 and the lower end of the pressing trapezoidal frame pressing plate 31 and is pressed and fixed by the oblique pressing beam 45; the side plate 33 of the ballast ladder is placed on the top of the top supporting plate 34, and the pressing plate 31 of the ballast ladder is pressed above the bottom plate chamfering template 41; the jack 29 is connected with the telescopic rod 30, the top of the telescopic rod 30 is provided with a supporting plate 43, and the supporting plate 43 is supported on a wall body. The other end of the bottom supporting plate 37 is supported by a vertical supporting rod 38 and is fixed by a lower nut 103 and an upper nut 104; the bottom of the vertical supporting rod 38 is provided with a bottom base 102, and the bottom base 102 is positioned above the foundation bedplate 4.

The post-cast strip independent formwork system 105 mainly comprises a section steel-steel plate combined post-cast strip temporary sealing device, a post-cast strip formwork system 81 and a top plate bottom die 83, wherein the section steel-steel plate combined post-cast strip temporary sealing device comprises: the post-cast strip die frame system comprises steel plates 76, profile steel 77, connecting screws 78 and transverse rods 82, wherein the steel plates 76 are supported between structural top plates 1 on two sides of the post-cast strip, the profile steel 77 and the transverse rods 82 are supported between the steel plates 76, gaps between the profile steel 77 and the steel plates 76 are filled by pressing plates 75, the profile steel 77 is arranged at the top of the connecting screws 78, and the post-cast strip die frame system 81 is supported at the bottom of a top plate die block 83; the center of the inner side of the steel plate 76 is provided with a fixing nut 80, two ends of a transverse rod 82 are respectively connected with the fixing nut 80, the bottom and the top of the center of the transverse rod 82 are respectively provided with a fixing bolt 79, and the fixing bolts 79 are connected with the connecting screw 78.

The adjustable water collection well opening template system comprises: the water collecting well opening template 70, a hanging ring 71, an upper cross beam 72, a lower cross beam 73 and a vertical connecting rod 74, wherein the hanging ring 71 is arranged at the top of the water collecting well opening template 70, the inner wall of the water collecting well opening template 70 is supported by adopting a recyclable inner supporting frame, the recyclable inner supporting frame is composed of the upper cross beam 72, the lower cross beam 73 and the vertical connecting rod 74, and the vertical connecting rod 74 is arranged between the cross beam 72 and the lower cross beam 73;

the side wall single-side template system consists of a standard joint tripod 47, a heightened joint tripod 49, a bottom drawknot system 50, a rear adjusting supporting leg 51, a front adjusting supporting leg 53, pre-buried straight thread steel 54, an outer connecting rod 59 and a side wall steel template 61; the side wall steel template 61 is reinforced by a tripod system, the tripod system comprises a tripod platform 46, a standard joint tripod 47 and a heightened joint tripod 49, the standard joint tripod 47 and the heightened joint tripod 49 are connected by bolts 48 at the joint, and the tripod platform 46 is arranged on the top side surface of the standard joint tripod 47; the side wall steel template 61 is provided with a groove vertical ridge 62 and a groove main ridge 63 on the side surface, and the groove main ridge 63 is connected with the standard section tripod 47 and the heightened section tripod 49 by adopting a template fastener 60; the embedded straight thread steel 54 is arranged at the top of the bottom plate inverted axillary angle 42, and the embedded straight thread steel 54 is connected with the outer connecting rod 59 through the connecting nut 55; the embedded U-shaped straight thread steel 64 is arranged at the top of the foundation bedplate 4, and the embedded U-shaped straight thread steel 64 is connected with the connecting rod 69 through a connecting steel piece 65; the outer connecting rod 59 passes through one end of the tripod bottom plate 106 and is fixed by the pressing beam 56, the casting gasket 57 and the butterfly nut 58; the connecting rod 69 passes through the other end of the tripod bottom plate 106 and is fixed by a vertical pressing beam 66, a gasket 67 and a pressing butterfly nut 68; the lower part of the tripod bottom plate 106 is provided with a rear adjusting supporting leg 51 and a front adjusting supporting leg 53, and the lower part of the rear adjusting supporting leg 51 is provided with H-shaped steel 52.

The heavy grade support transfers slope system include: the unit slope adjusting bracket 85, the vertical steel pipe 86, the bottom adjusting backing plate 87 and the top adjusting supporting plate 89, wherein the vertical steel pipe 86 and the horizontal steel pipe are assembled into the unit slope adjusting bracket 85, the top of the vertical steel pipe 86 is provided with the top adjusting supporting plate 89, the bottom of the vertical steel pipe 86 is provided with the bottom adjusting backing plate 87, and the slope bottom plate template 88 is arranged above the top adjusting supporting plate 89;

the prefabricated cushion cap fetal membrane construction system comprises: a transverse long template 90, a longitudinal long template 91, a prefabricated bearing platform tire membrane 92, an outer connecting piece 94, a longitudinal short template 95, screws 96, a transverse short template 97, a longitudinal middle template 98 and an inner connecting piece 99; the transverse long template 90, the longitudinal long template 91, the longitudinal short template 95, the transverse short template 97 and the longitudinal middle template 98 are assembled into a framework structure of the prefabricated bearing platform fetal membrane 92, and are fixed by fixing screws 93, outer connecting pieces 94 and inner connecting pieces 99; the outer side ends of the transverse long template 90, the longitudinal long template 91, the longitudinal short template 95, the transverse short template 97 and the longitudinal middle template 98 are provided with a plurality of screws 96; the transverse long template 90 and the longitudinal short template 95 are fixed at the butt joint by adopting an external connecting piece 94; the longitudinal short templates 95 and the transverse short templates 97 are fixed by adopting external connectors 94 at the butt joint positions; the transverse short template 97 and the longitudinal middle template 98 are fixed at the joint by adopting an inner connecting piece 99; the outer connecting piece 94 and the inner connecting piece 99 are of inverted V-shaped design, and a plurality of connecting piece reserved holes 100 are formed in the side face; the screw 96 passes through the connecting member preformed hole 100 and is fixed by the fixing screw 93.

Claims (10)

1. The construction method of the underground frame structure is characterized by comprising the following steps of:

constructing an underground continuous wall (2), engineering piles (3), guard piles (6) and lattice columns (8), constructing a first-deformation adjustable concrete horizontal support (10), excavating a foundation slab (4) by adopting a basin type, and excavating a two-stage slope-releasing central island on the inner side of the underground continuous wall (2);

step two, splicing a prefabricated pile cap tire membrane (92) at the top of the engineering pile (3), and pouring a pile foundation pile cap (101); installing an adjustable water collecting well opening template (70) and supporting the template by a recyclable inner supporting frame, and then pouring a water collecting well (5);

step three, constructing a foundation slab (4) and a supporting upright post (19) in sequence;

installing a bottom plate chamfering template (41) through a bottom plate chamfering template installation stabilizing system, and pouring bottom plate chamfering angles (42); constructing a side wall (44) through a side wall single-side template system;

fifthly, connecting the deformation-adjustable concrete horizontal support (10) with a central island main body structure top plate (7), and arranging sliding connectors (22) on the side surfaces of the end parts of the deformation-adjustable concrete horizontal support (10);

and step six, excavating earth in the back pressure area, constructing a second steel support (9), excavating back pressure soil, constructing a foundation slab (4), reserving a post-pouring belt through a post-pouring belt independent formwork system (105), and pouring.

2. The method of constructing an underground frame structure according to claim 1, wherein in step one: a crown beam (14) is arranged at the top of the underground diaphragm wall (2), and a waist beam (15) is arranged in the middle of the underground diaphragm wall (2); firstly, binding a structural top plate circumferential stirrup (23) and a structural top plate longitudinal main rib (24), arranging lattice columns (8) at the top of a central island main body structure bottom plate (12), arranging a bearing plate (25) at the top of each layer of lattice columns (8), and arranging a central island main body structure middle plate (13) and a central island main body structure top plate (7) on the bearing plate (25); the middle soil body of the foundation pit at the foundation bottom plate (4) is excavated in a basin mode, the soil body at the inner side of the underground diaphragm wall (2) is inclined in two stages, back pressure soil is reserved, and the excavation of the soil body of the central island is completed.

3. The method of constructing an underground frame structure according to claim 1, wherein in the second step: the prefabricated bearing platform fetal membrane (92) framework structure is formed by assembling a transverse long template (90), a longitudinal long template (91), a longitudinal short template (95), a transverse short template (97) and a longitudinal middle template (98);

binding a reinforcement cage of a water collecting well (5), installing an adjustable water collecting well opening template (70) system at the water collecting well (5) according to a design drawing, pouring the water collecting well (5), specifically, assembling an upper cross beam (72), a lower cross beam (73) and a vertical connecting rod (74) for a recyclable inner support frame, wherein a hanging ring (71) is arranged at the top of the water collecting well opening template (70), connecting the hanging ring (71) with a steel wire rope, then installing the water collecting well opening template (70) at the water collecting well (5) needing pouring by using a crane, and installing the recyclable inner support frame in the water collecting well opening template (70);

in the second step, a vertical embedded screw (39), an oblique embedded screw (40) and an embedded U-shaped straight thread steel (64) are arranged at the top of the foundation base plate (4).

4. The method of constructing an underground frame structure according to claim 1, wherein in step four: firstly binding reinforcement cages at the bottom plate inverted axillary angles (42), then constructing a bottom plate chamfering template mounting stabilizing system, then pouring the bottom plate inverted axillary angles (42), arranging pre-buried straight thread steel (54) at the tops of the bottom plate inverted axillary angles (42),

the bottom plate chamfering template mounting and stabilizing system comprises a weight trapezoidal frame (32), a vertical supporting system (36), a vertical embedded screw (39) and an oblique embedded screw (40); the vertical supporting system (36) supports the ballast ladder frame (32), the top of the vertical supporting system (36) is provided with a top supporting plate (34), and the bottom of the vertical supporting system (36) is provided with a bottom supporting plate (37); the side face of the weight ladder frame (32) is provided with a weight ladder frame side plate (33), the bottom of the weight ladder frame (32) is provided with a weight ladder frame pressing plate (31), and a jack (29) is arranged below the upper end of the weight ladder frame pressing plate (31); the vertical embedded screw (39) and the inclined embedded screw (40) are embedded at the top of the foundation bedplate (4), and the vertical embedded screw (39) penetrates through one end of the bottom supporting plate (37) and is fixed by the top pressing beam (35); the oblique embedded screw (40) penetrates through the lower ends of the bottom plate chamfering template (41) and the pressing trapezoid frame pressing plate (31) and is pressed and fixed by the oblique pressing beam (45).

5. The method of constructing an underground frame structure according to claim 4, wherein in step four: specifically, a bottom plate chamfering template (41) is arranged at the side surface of a bottom plate chamfering corner (42), a weight trapezoid frame (32) is arranged at the top of the bottom plate chamfering template (41), and one end of the bottom plate chamfering template (41) and one end of the weight trapezoid frame (32) are fixed by utilizing an oblique embedded screw (40); a vertical supporting system (36) is arranged below the side of the ballast ladder frame (32), and the jack (29) is adjusted to enable the supporting plate (43) of the telescopic rod (30) to be supported on the wall body; one end of a bottom supporting plate (37) of the vertical supporting system (36) is fixed by utilizing a vertical embedded screw (39), and a vertical supporting rod (38) is arranged at the other end of the bottom supporting plate (37); the top of the bottom plate reverse axillary angle (42) is provided with a pre-buried straight thread steel (54).

6. The method of constructing an underground frame structure according to claim 5, wherein in step four: the side wall single-side template system comprises a bottom drawknot system (50), a rear adjusting supporting leg (51), a front adjusting supporting leg (53), pre-embedded straight thread steel (54), an outer connecting rod (59) and a side wall steel template (61); the side wall steel template (61) is provided with a tripod system, the tripod system comprises a frame picking platform (46), a standard joint tripod (47) and a heightening joint tripod (49), the standard joint tripod (47) and the heightening joint tripod (49) are connected by bolts (48) at the butt joint position, and the frame picking platform (46) is arranged on the top side surface of the standard joint tripod (47); a groove vertical rib (62) and a groove main rib (63) are arranged on the side surface of the side wall steel template (61), and the groove main rib (63) is connected with a standard joint tripod (47) and a heightened joint tripod (49) by a template fastener (60); a tripod system is formed by a cantilever platform (46), a standard joint tripod (47) and a heightened joint tripod (49), a side wall steel template (61) is connected with the tripod system by using a template fastener (60), and a side wall (44) single-side template system is fixed by using pre-embedded straight thread steel (54) and pre-embedded U-shaped straight thread steel (64).

7. The method of constructing an underground frame structure according to claim 1, wherein in step five: the deformation adjustable concrete horizontal support (10) is connected with the central island main body structure top plate (7), and the deformation adjustable concrete horizontal support (10) comprises a concrete support longitudinal main rib (16) and a concrete support circumferential stirrup (17); binding a concrete support longitudinal main rib (16) and a concrete support circumferential stirrup (17), wherein the concrete support longitudinal main rib (16) is connected with a structural roof longitudinal main rib (24) through a connecting rib (18); the side surface of the end part of the deformation-adjustable concrete horizontal support (10) is connected with a fixed sliding connecting piece (22) through a pre-buried bolt (20), and a support column (19) is arranged below the deformation-adjustable concrete horizontal support (10).

8. The method of constructing an underground frame structure according to claim 2, wherein in step six: removing the back pressure soil to the lower part of the second steel support (9), constructing the second steel support (9), and removing the back pressure soil to the designed elevation of the foundation slab (4) after the second steel support (9) forms strength; two ends of the second steel support (9) are respectively connected with the waist beam (15), and a support upright post (19) is arranged below the second steel support (9);

the slope foundation slab (4) is a slope foundation slab (84), when the slope foundation slab (4) is constructed, a large-slope support slope adjusting system is firstly erected, the large-slope support slope adjusting system comprises a unit slope adjusting support (85), the unit slope adjusting support (85) comprises a vertical steel pipe (86) and a horizontal steel pipe, the top of the vertical steel pipe (86) is provided with a top adjusting supporting plate (89), the bottom of the vertical steel pipe is provided with a bottom adjusting supporting plate (87), and a slope foundation slab template (88) is arranged above the top adjusting supporting plate (89); specifically, a vertical steel pipe (86) and a horizontal steel pipe are combined to form a unit slope adjusting bracket (85), and the slope is adjusted through a bottom adjusting base plate (87) and a top adjusting supporting plate (89).

9. The method of constructing an underground frame structure according to claim 1, wherein in step six: when the foundation slab (4) is constructed, a post-cast strip is required to be reserved, the construction is realized through a post-cast strip independent formwork system (105), the post-cast strip independent formwork system (105) comprises a profile steel-steel plate combined post-cast strip temporary sealing device, a post-cast strip formwork system (81) and a top plate bottom die (83), the profile steel-steel plate combined post-cast strip temporary sealing device comprises a steel plate (76), profile steels (77), connecting screws (78) and transverse rods (82), the steel plate (76) is supported between structural top plates (1) on two sides of the post-cast strip, the profile steels (77) and the transverse rods (82) are supported between the steel plates (76), gaps between the profile steels (77) and the steel plates (76) are filled by pressing plates (75), the profile steels (77) are arranged at the tops of the connecting screws (78), and the post-cast strip formwork system (81) is supported at the bottoms of the top plate bottom die (83);

specifically, a plate (76), a section steel (77), a connecting screw (78) and a transverse rod (82) are assembled to form a section steel-steel plate combined post-pouring strip temporary sealing device, and then the section steel-steel plate combined post-pouring strip temporary sealing device is installed at a reserved post-pouring strip; after the foundation slab (4) is constructed, the section steel-steel plate combined post-cast strip temporary sealing device is removed, and then the post-cast strip is poured, specifically, the pressing plate (75) is removed firstly, and then the connecting screw rod (78) and the transverse rod (82) are removed.

10. Underground frame structure, characterized in that it is obtained by the method according to any one of claims 1 to 9.