CN112627193A - Deep foundation pit open-cut supporting structure and construction method thereof - Google Patents
Deep foundation pit open-cut supporting structure and construction method thereof Download PDFInfo
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- CN112627193A CN112627193A CN202011570125.XA CN202011570125A CN112627193A CN 112627193 A CN112627193 A CN 112627193A CN 202011570125 A CN202011570125 A CN 202011570125A CN 112627193 A CN112627193 A CN 112627193A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
Abstract
The utility model relates to a deep basal pit open cut supporting construction and construction method thereof, relate to the field of construction, it includes that the fixed fender that encloses of establishing at the inside wall round of foundation ditch, enclose that keep off the internal corner all along the fixed a plurality of angle support columns that is provided with of vertical direction, be provided with a plurality of spliced pole between the adjacent angle support column on same horizontal plane, the spliced pole with enclose fender fixed connection, all be provided with supporting component between angle support column and its adjacent spliced pole and between two adjacent spliced poles, it has round concrete dado to pour into in the fender, the angle support column, spliced pole and supporting component all bury underground in the concrete dado. This application has the effect that improves the support intensity and the stability to the foundation ditch.
Description
Technical Field
The application relates to the field of building construction, in particular to a deep foundation pit open-cut supporting structure and a construction method thereof.
Background
With the increasingly tense urban construction land and the increasingly large scale of underground space development and utilization, the increasing number of deep foundation pit projects, the larger excavation area of the foundation pit and the deeper excavation depth. The foundation pit support is a supporting, blocking, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit.
The existing foundation pit supporting forms mainly comprise row pile supporting, underground continuous wall supporting, cement retaining walls, steel sheet piles, soil nailing walls, foundation pit inner supports or a combination mode of two or more than two of the prior foundation pit supporting forms. However, the inventor finds that in the actual construction process, when the plane size of the foundation pit is larger, the existing foundation pit supporting form has limited supporting effect on the foundation pit, and the strength and the stability of the foundation pit supporting structure are difficult to ensure.
Disclosure of Invention
In order to improve the supporting strength and stability of a foundation pit, the application provides a deep foundation pit open-cut supporting structure and a construction method thereof.
In a first aspect, the application provides a deep foundation pit open cut supporting structure, adopts following technical scheme:
the utility model provides a deep basal pit open cut supporting construction, enclose including fixed and establish the fender of enclosing at foundation ditch inside wall round, enclose the fixed a plurality of angle support columns that are provided with of vertical direction all along of fender internal corner department, be provided with a plurality of spliced pole between the adjacent angle support column on the same horizontal plane, the spliced pole with enclose fender fixed connection, all be provided with supporting component between angle support column and its adjacent spliced pole and between two adjacent spliced poles, it has round concrete dado to pour into a mould in enclosing the fender, the angle support column, spliced pole and supporting component all bury underground in the concrete dado.
By adopting the technical scheme, the corner supporting columns and the connecting columns are fixedly arranged in the enclosure, the supporting components are arranged between the corner supporting columns and the adjacent connecting columns and between the two adjacent connecting columns, the supporting components play a supporting role for the corner supporting columns and the connecting columns, and the corner supporting columns and the connecting columns are tightly arranged in the enclosure, so that the enclosure is reinforced, and the subsequent excavation and construction processes in a foundation pit are prevented from being influenced; the concrete dado plays further reinforcing effect to enclosing and keeping off inside to diagonal angle support column, spliced pole and supporting component play the fixed action, thereby effectively improved the intensity and the stability of strutting to the foundation ditch.
Preferably, the supporting component comprises a first supporting rod, a second supporting rod and an adjusting rod, one end, far away from each other, of the first supporting rod and the second supporting rod is abutted against two adjacent connecting columns or two adjacent connecting columns, the two ends of the adjusting rod are inserted into one ends, close to each other, of the first supporting rod and the second supporting rod respectively, the two ends of the adjusting rod are connected with the first supporting rod and the second supporting rod in a threaded mode respectively, and the thread directions of the two ends of the adjusting rod are opposite.
Through adopting above-mentioned technical scheme, during the support, the rotation is adjusted the pole, because the both ends of adjusting the pole respectively with first bracing piece and second bracing piece threaded connection, and adjust the screw thread opposite direction at pole both ends, it can make first bracing piece and second bracing piece keep away from each other to adjust the pole, thereby make the one end that first bracing piece and second bracing piece kept away from each other respectively with two adjacent spliced poles or the inseparable butt of angle brace post rather than adjacent spliced pole, thereby make supporting component support tightly at two adjacent spliced poles or angle brace post rather than adjacent spliced pole, play the supporting role to spliced pole and angle brace post, make spliced pole and angle brace post can closely set up in enclosing the fender, strengthened the effect of strutting to the foundation ditch.
Preferably, the supporting components between the corner supporting column and the adjacent connecting column and between the two adjacent connecting columns are provided with two groups, the two groups of supporting components are obliquely arranged in a vertical plane, and the inclination directions of the two groups of supporting components are opposite.
Through adopting above-mentioned technical scheme, all alternately set up two sets of supporting components between angle brace post and its adjacent spliced pole and between two adjacent spliced poles, not only can play the stable tight effect of supporting between angle brace post and its adjacent spliced pole and between two adjacent spliced poles, can also improve the atress situation of angle brace post and spliced pole, improve the self intensity and the rigidity of angle brace post and spliced pole, reduced the possibility that angle brace post and spliced pole take place to warp, further improved the intensity and the stability of strutting to the foundation ditch.
Preferably, the supporting holes are formed in the two sides of the corner supporting columns and the connecting columns, and one ends, far away from each other, of the first supporting rods and the second supporting rods are inserted into the supporting holes.
Through adopting the above technical scheme, set up the supported hole on corner brace post and spliced pole, the one end that can make first bracing piece and second bracing piece keep away from each other all inserts and establishes in the supported hole, thereby play limiting displacement to first bracing piece and second bracing piece, avoid first bracing piece and second bracing piece to slide on corner brace post or spliced pole, the support intensity between bracing piece diagonal angle support column and its adjacent spliced pole and between two adjacent spliced poles has been improved, thereby the intensity and the stability of strutting to the foundation ditch have been improved.
Preferably, a rubber pad is fixedly arranged in the supporting hole.
Through adopting above-mentioned technical scheme, set up the rubber pad in the brace hole, not only can increase first bracing piece, the frictional force between second bracing piece and corner brace post or the spliced pole, further reduce gliding possibility on corner brace post or spliced pole of first bracing piece and second bracing piece, also can be under the elastic effect of rubber pad self, make first bracing piece and second bracing piece closely insert and establish in the brace hole, thereby further improved first bracing piece, the support intensity between second bracing piece diagonal brace post and its adjacent spliced pole and between two adjacent spliced poles.
Preferably, all seted up the enhancement hole on first bracing piece and the second bracing piece, wear to be equipped with the enhancement nail in the enhancement hole, the enhancement nail passes and encloses the fender and insert and establish in the lateral wall of foundation ditch.
Through adopting above-mentioned technical scheme, closely support the back between rather than adjacent spliced pole or two adjacent spliced poles when first bracing piece and second bracing piece, will strengthen the nail and pass the enhancement hole and enclose the fender to in the lateral wall of foundation ditch, play the fixed action to first bracing piece and second bracing piece, thereby strengthened the supporting component to enclosing the supporting role who keeps off, angle bracing piece and spliced pole, further improved the intensity and the stability of strutting to the foundation ditch.
Preferably, enclose and seted up a plurality of hole of stepping down on keeping off, all set up a plurality of and the fixed orifices of the hole one-to-one that steps down on spliced pole and the angle brace pole, wear to be equipped with in the fixed orifices and insert the dead lever of establishing at the foundation ditch lateral wall, the dead lever is worn to establish in the hole of stepping down, threaded connection has fixation nut on the dead lever, fixation nut is located spliced pole or angle brace pole and keeps away from the one side of enclosing the fender.
Through adopting the above technical scheme, during the support, pass the fixed orifices in proper order with the dead lever and step down the hole, and with in nailing the lateral wall of foundation ditch with the dead lever, thereby fix the dead lever in the foundation ditch stably, then screw up fixation nut on the dead lever, make angle support post and spliced pole fix and keep off on enclosing, realize the fixed action of diagonal angle support post and spliced pole, support intensity and stability of support column and spliced pole to the foundation ditch have not only been improved, also be convenient for support making supporting component diagonal angle support post and spliced pole, it is more convenient to make the process of strutting of foundation ditch.
Preferably, the enclosure is formed by mutually abutting and assembling a plurality of fixing piles.
Through adopting above-mentioned technical scheme, during the construction, beat into the spud pile of a plurality of butt in proper order in the foundation ditch to make it form and enclose the fender, not only can play the stabilizing support effect to the foundation ditch lateral wall, also can reduce in the groundwater infiltration foundation ditch, and make the work progress of enclosing the fender very convenient.
Preferably, a waterproof layer is fixedly arranged on one side of the enclosure close to the concrete retaining wall.
Through adopting above-mentioned technical scheme, setting up the waterproof layer in enclosing the fender, can playing effectively to stop the effect to groundwater, further reduce in groundwater infiltration foundation ditch, make digging of foundation ditch establish the process more convenient, also avoid groundwater to cause serious corruption or impact to the basis in the foundation ditch.
In a second aspect, the application provides a deep foundation pit open cut supporting structure and a construction method thereof, and the following technical scheme is adopted:
a deep foundation pit open cut supporting structure and a construction method thereof comprise the following steps:
s1, construction preparation: cleaning a construction site, preparing all mechanical equipment and transportation roads inside and outside the site, then carrying out measurement and setting-out on the construction site, determining a foundation pit excavation line and marking the foundation pit excavation line;
s2, forming a fence: sequentially driving a plurality of fixing piles vertically downwards along the marked foundation pit excavation line, and abutting adjacent fixing piles to enable the fixing piles to form a circle of enclosure along the foundation pit excavation line;
s3, excavating: excavating for many times in the formed enclosure along the vertical direction, wherein the excavation depth is greater than the height of the corner support columns and less than twice of the height of the corner support columns;
s4, supporting: after each excavation, fixing angle support columns at four corners of the enclosure, fixing a plurality of connecting columns on the enclosure between adjacent angle support columns, rotating the adjusting rod to enable the first support rod and the second support rod to be away from each other, and enabling the ends, away from each other, of the first support column and the second support column to be respectively and tightly inserted into the support holes of the angle support columns and the adjacent connecting columns or the adjacent two connecting columns;
s5, casting a protective wall: after the supporting is finished, a circle of template is built in the foundation pit, the corner supporting columns, the connecting columns and the supporting assemblies are all enclosed between the template and the enclosing barrier, then concrete is poured between the template and the enclosing barrier to form the concrete retaining wall, and after the concrete retaining wall is formed, the next excavation is carried out.
Through adopting above-mentioned technical scheme, excavate many times in enclosing the fender to set up angle support post and spliced pole in the foundation ditch after excavating at every turn, then at angle support post and adjacent spliced pole or two adjacent spliced pole installation supporting component, diagonal angle support post and spliced pole play the stabilizing support effect, make angle support post and spliced pole play the reinforcement effect to enclosing the fender, and at enclosing the inside pouring concrete dado of fender, effectively improved the intensity and the stability of strutting to the foundation ditch.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the angle supporting columns and the connecting columns are fixedly arranged in the enclosure, and the supporting components are arranged between the angle supporting columns and the adjacent connecting columns and between the two adjacent connecting columns, so that the enclosure is reinforced, and the supporting strength and the stability of the foundation pit are effectively improved;
2. two groups of supporting components are arranged between the corner supporting column and the adjacent connecting column in a crossed manner and between the two adjacent connecting columns, so that the strength and rigidity of the corner supporting column and the connecting column are improved, and the supporting strength and stability of the foundation pit are further improved;
3. through all wearing to establish the reinforcement nail on first bracing piece and second bracing piece to in nailing the lateral wall of foundation ditch with the dead lever, not only improved support intensity and the stability of support column and spliced pole to the foundation ditch, also be convenient for support messenger's supporting component diagonal angle support column and spliced pole.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
FIG. 2 is a schematic view of a partial structure intended to show a support assembly;
FIG. 3 is an exploded schematic view intended to show a fixing hole;
fig. 4 is a partial sectional view intended to show a rubber pad;
fig. 5 is an exploded schematic view intended to show a reinforced hole.
Description of reference numerals: 1. fencing; 11. a hole of abdication; 2. a waterproof layer; 3. a corner support post; 31. a fixing hole; 32. fixing the rod; 33. fixing a nut; 34. a support hole; 341. a rubber pad; 4. connecting columns; 5. a support assembly; 51. a first support bar; 511. a reinforcement hole; 512. reinforcing nails; 52. a second support bar; 53. adjusting a rod; 531. adjusting the handle; 6. concrete dado; 7. and (6) foundation pit.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses deep basal pit open cut supporting construction.
Referring to fig. 1 and 2, deep basal pit open cut supporting construction encloses fender 1 of establishing at foundation ditch 7 inner wall including enclosing, enclose and keep off 1 internal corner all fixed being provided with cornered support column 3, be provided with a plurality of spliced pole 4 between adjacent cornered support column 3, spliced pole 4 with enclose fender 1 fixed connection, all be provided with supporting component 5 between cornered support column 3 and its adjacent spliced pole 4 and between two adjacent spliced poles 4, it has concrete dado 6 to pour into in enclosing fender 1, cornered support column 3, spliced pole 4 and supporting component 5 are all buried underground in concrete dado 6.
Referring to fig. 1, enclose fender 1 and be formed by the mutual butt spelling of a plurality of spud pile, the spud pile adopts the channel-section steel of vertical setting, and positive and negative looks is buckled between the adjacent channel-section steel. A circle of waterproof layer 2 is fixedly arranged on the inner side of the enclosure 1. Enclose fender 1 and can play the supporting role to the lateral wall of foundation ditch 7, waterproof layer 2 can effectively reduce in groundwater infiltration foundation ditch 7.
Referring to fig. 1, corner support post 3 is provided with a plurality of along vertical direction, the mutual butt of two adjacent corner support posts 3 in vertical direction, and spliced pole 4 also is provided with a plurality of along vertical direction, and corresponds the setting with corner support post 3, the mutual butt of two adjacent spliced poles 4 in vertical direction, and the height of spliced pole 4 is the same with corner support post 3's height. Referring to fig. 2 and 3, equal vertical setting of corner brace post 3 and spliced pole 4, the transversal L shape that personally submits of corner brace post 3, the transversal rectangle of personally submitting of spliced pole 4, a plurality of fixed orifices 31 has all been seted up along vertical direction on two sides of corner brace post 3 and the spliced pole 4, enclose and have seted up the hole of stepping down 11 on the spud pile that keeps off 1 and go up the one-to-one, wear to be equipped with horizontally dead lever 32 in the fixed orifices 31, dead lever 32 wears to establish on waterproof layer 2, and wear to establish in the hole of stepping down 11, the one end of dead lever 32 is inserted and is established in the soil body of foundation ditch 7 lateral wall, threaded connection has fixation nut 33 on the dead lever 32, fixation nut 33 is located spliced pole 4 or corner brace.
During construction, the corner support columns 3 and the connecting columns 4 are fixed on the inner sides of the surrounding baffles 1 through the fixing rods 32 and the fixing nuts 33, so that the corner support columns 3 and the connecting columns 4 support and reinforce the surrounding baffles 1, the stability of the surrounding baffles 1 in the foundation pit 7 is improved, and the supporting effect on the foundation pit 7 is enhanced.
Referring to fig. 2, two sets of supporting assemblies 5 are arranged between the corner support column 3 and the adjacent connecting column 4 and between the two adjacent connecting columns 4 in the same horizontal plane, the two sets of supporting assemblies 5 are all obliquely arranged in the vertical plane, the oblique directions of the two sets of supporting assemblies 5 are opposite, and one set of supporting assembly 5 is located on one side, close to the enclosure 1, of the other set of supporting assembly 5. Referring to fig. 2 and 4, the support assembly 5 includes a first support rod 51, a second support rod 52 and an adjusting rod 53, the length directions of the first support rod 51, the second support rod 52 and the adjusting rod 53 are all the same, support holes 34 are formed in the bottom ends and the top ends of the two sides of the corner support columns 3 and the connecting columns 4, rubber pads 341 are fixedly arranged in the support holes 34, the ends, away from each other, of the first support rod 51 and the second support rod 52 are respectively inserted into the support holes 34 of the two adjacent connecting columns 4 or the corner support columns 3 and the adjacent connecting columns 4, and the ends, away from each other, of the first support rod 51 and the second support rod 52 are tightly abutted to the rubber pads 341; the adjusting rod 53 is located between the first supporting rod 51 and the second supporting rod 52, two ends of the adjusting rod 53 are respectively inserted into one end of the first supporting rod 51, which is close to the second supporting rod 52, two ends of the adjusting rod 53 are respectively in threaded connection with the first supporting rod 51 and the second supporting rod 52, the thread directions of the two ends of the adjusting rod 53 are opposite, and the adjusting rod 53 is fixedly provided with an adjusting handle 531.
During construction, the ends of the first support rod 51 and the second support rod 52, which are far away from each other, are inserted into the support holes 34 of the two adjacent connecting columns 4 or the corner support column 3 and the adjacent connecting column 4, the adjusting handle 531 is rotated, the adjusting handle 531 drives the adjusting rod 53 to rotate, the first support rod 51 and the second support rod 52 are far away from each other, the ends of the first support rod 51 and the second support rod 52, which are far away from each other, are tightly abutted to the rubber pads 341 in the support holes 34, a stable supporting effect is achieved between the two adjacent connecting columns 4 and between the corner support column 3 and the adjacent connecting column 4, the reinforcing effect on the enclosure 1 is further enhanced, and the supporting strength and the stability of the foundation pit 7 are effectively improved.
Referring to fig. 5, the first support rod 51 and the second support rod 52 are both provided with a plurality of reinforcing holes 511, reinforcing nails 512 penetrate through the reinforcing holes 511, and the reinforcing nails 512 penetrate through the enclosure 1 and the waterproof layer 2 and are inserted into the soil body on the side wall of the foundation pit 7. After the supporting component 5 is supported between two adjacent connecting columns 4 and between the corner supporting column 3 and the adjacent connecting column 4, the reinforcing nail 512 sequentially penetrates through the reinforcing hole 511, the waterproof layer 2 and the enclosure 1 and is nailed into the soil body on the side wall of the foundation pit 7, the first supporting rod 51 and the second supporting rod 52 are reinforced, and the supporting strength and the stability of the foundation pit 7 are further improved.
The implementation principle of the open-cut supporting structure of the deep foundation pit in the embodiment of the application is as follows: during construction, the corner support columns 3 and the connecting columns 4 are fixed on the inner sides of the enclosure 1 through the fixing rods 32 and the fixing nuts 33, so that the corner support columns 3 and the connecting columns 4 have supporting and reinforcing effects on the enclosure 1; then, the ends of the first support rod 51 and the second support rod 52, which are far away from each other, are respectively inserted into the support holes 34 of the two adjacent connecting columns 4 or the corner support column 3 and the connecting column 4 adjacent thereto, and then the adjusting handle 531 is rotated, so that the adjusting handle 531 drives the adjusting rod 53 to rotate, and the first support rod 51 and the second support rod 52 are far away from each other, and thus the ends of the first support rod 51 and the second support rod 52, which are far away from each other, are tightly abutted to the rubber pads 341 in the support holes 34; and then the reinforcing nails 512 sequentially pass through the reinforcing holes 511, the waterproof layer 2 and the enclosure 1 and are nailed into the soil body on the side wall of the foundation pit 7, so that the two adjacent connecting columns 4 and the corner support columns 3 and the adjacent connecting columns 4 are stably supported, and the supporting strength and the stability of the foundation pit 7 are effectively improved.
The embodiment of the application also discloses a construction method of the open-cut supporting structure of the deep foundation pit.
The construction method of the open-cut supporting structure of the deep foundation pit comprises the following steps:
s1, construction preparation:
firstly, the existence of obstacles and pipelines in the underground of a construction site is ascertained, and a protection scheme is formulated according to the burial depth and the trend of the existing pipelines and related departments, so that the construction safety is ensured; then, water drainage work around the outside of the foundation pit 7 is performed, and it is guaranteed that surface water outside the site does not flow into the foundation pit 7; preparing all mechanical equipment and transportation roads inside and outside the yard; and finally, measuring and setting out the construction site according to the design requirements of the design drawing, determining the excavation line of the foundation pit 7 and marking.
S2, forming the enclosure 1:
a plurality of spud pile is driven into in proper order along the vertical downwards of 7 excavation lines of foundation ditch of mark, and the spud pile adopts the channel-section steel, makes the positive and negative butt of detaining of adjacent channel-section steel to make the spud pile form the round along 7 excavation lines of foundation ditch and enclose fender 1, lay one deck waterproof layer 2 in enclosing fender 1 again.
S3, excavating:
and excavating for many times in the formed enclosure 1 along the vertical direction, wherein the excavation depth is greater than the height of the corner support columns 3 and less than twice the height of the corner support columns 3.
S4, supporting:
after the excavation of every time finishes, all place vertical corner support post 3 at four corners that enclose fender 1, then enclose between adjacent corner support post 3 and keep off 1 and place the vertical spliced pole 4 of a plurality of, pass the fixed orifices 31 on corner support post 3 or spliced pole 4 with dead lever 32 in proper order, waterproof layer 2 with enclose the hole of stepping down 11 on keeping off 1, and in the soil body of nailing into 7 lateral walls of foundation ditch, then screw up fixation nut 33 on dead lever 32, thereby fix corner support post 3 and spliced pole 4 in the inboard that encloses fender 1, make corner support post 3 and spliced pole 4 to enclosing fender 1 and play support and reinforcement.
Then two groups of supporting components 5 are placed between the corner support column 3 and the adjacent connecting column 4 and between the two adjacent connecting columns 4, the two groups of supporting components 5 are arranged in a crossed manner, the rotation adjusting rod 53 is rotated, the first supporting rod 51 and the second supporting rod 52 are far away from each other, one ends, far away from each other, of the first supporting rod and the second supporting rod are respectively inserted into the supporting holes 34 of the corner support column 3 and the adjacent connecting column 4 or the two adjacent connecting columns 4, the first supporting rod 51 and the second supporting rod 52 are tightly abutted to the rubber pads 341 in the supporting holes 34, and therefore a stable supporting effect is achieved between the two adjacent connecting columns 4 and between the corner support column 3 and the adjacent connecting column 4, and supporting strength and stability of the foundation pit 7 are effectively improved.
And finally, the reinforcing nails 512 sequentially penetrate through the reinforcing holes 511 on the first supporting rod 51 or the second supporting rod 52, the waterproof layer 2 and the enclosure 1 and are nailed into the soil body on the side wall of the foundation pit 7, so that the first supporting rod 51 and the second supporting rod 52 are reinforced, and the supporting strength and the stability of the foundation pit 7 are further improved.
S5, casting a protective wall:
after the supporting is finished, a circle of template is built in the foundation pit 7, the corner support columns 3, the connecting columns 4 and the support assemblies 5 are all enclosed between the template and the enclosure 1, then concrete is poured between the template and the enclosure 1 to form the concrete retaining wall 6, after the concrete retaining wall 6 is solidified and formed, the next excavation and supporting are carried out, and the supporting process of the excavation of the foundation pit 7 is realized in such a circulating reciprocating manner.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a deep basal pit open cut supporting construction, a serial communication port, enclose including fixed and establish fender (1) of enclosing of foundation ditch (7) inside wall round, enclose fender (1) internal corner all along vertical direction fixed being provided with a plurality of angle support post (3), be provided with between adjacent angle support post (3) on the same horizontal plane a plurality of spliced pole (4), spliced pole (4) with enclose fender (1) fixed connection, all be provided with between angle support post (3) and rather than adjacent spliced pole (4) and between two adjacent spliced poles (4) supporting component (5), it has round concrete dado (6) to enclose to pour into a mould in fender (1), angle support post (3), spliced pole (4) and supporting component (5) all bury underground in concrete dado (6).
2. The open-cut supporting structure for the deep foundation pit according to claim 1, wherein the supporting component (5) comprises a first supporting rod (51), a second supporting rod (52) and an adjusting rod (53), one ends, far away from each other, of the first supporting rod (51) and the second supporting rod (52) are respectively abutted against two adjacent connecting columns (4) or one end, far away from each other, of an angle supporting column (3) and the adjacent connecting column (4), two ends of the adjusting rod (53) are respectively inserted into one ends, close to each other, of the first supporting rod (51) and the second supporting rod (52) and are respectively in threaded connection with the first supporting rod (51) and the second supporting rod (52), and the thread directions of the two ends of the adjusting rod (53) are opposite.
3. The open-cut supporting structure for the deep foundation pit according to claim 1, wherein two groups of supporting assemblies (5) are arranged between the corner supporting columns (3) and the adjacent connecting columns (4) and between the two adjacent connecting columns (4), the two groups of supporting assemblies (5) are obliquely arranged in a vertical plane, and the oblique directions of the two groups of supporting assemblies (5) are opposite.
4. The open-cut supporting structure of a deep foundation pit according to claim 2, wherein support holes (34) are formed in both sides of the corner support columns (3) and the connecting columns (4), and ends, far away from each other, of the first support rods (51) and the second support rods (52) are inserted into the support holes (34).
5. The open-cut support structure for deep foundation pits according to claim 4, wherein rubber pads (341) are fixedly arranged in the support holes (34).
6. The open-cut supporting structure of a deep foundation pit according to claim 2, wherein the first supporting rod (51) and the second supporting rod (52) are provided with reinforcing holes (511), reinforcing nails (512) penetrate through the reinforcing holes (511), and the reinforcing nails (512) penetrate through the enclosure (1) and are inserted into the side wall of the foundation pit (7).
7. The open-cut supporting structure for the deep foundation pit according to claim 1, wherein a plurality of yielding holes (11) are formed in the enclosure (1), a plurality of fixing holes (31) corresponding to the yielding holes (11) in a one-to-one manner are formed in the connecting column (4) and the corner supporting columns (3), fixing rods (32) inserted into the side walls of the foundation pit (7) penetrate through the fixing holes (31), the fixing rods (32) penetrate through the yielding holes (11), fixing nuts (33) are connected to the fixing rods (32) in a threaded manner, and the fixing nuts (33) are located on one side, away from the enclosure (1), of the connecting column (4) or the corner supporting columns (3).
8. The open-cut supporting structure of a deep foundation pit according to claim 1, wherein the enclosure (1) is formed by mutually abutting and assembling a plurality of fixing piles.
9. The open-cut supporting structure of a deep foundation pit according to claim 1, wherein a waterproof layer (2) is fixedly arranged on one side of the enclosure (1) close to the concrete retaining wall (6).
10. The construction method of the open-cut support structure for a deep foundation pit according to any one of claims 1 to 9, comprising the steps of:
s1, construction preparation: cleaning a construction site, preparing all mechanical equipment and transportation roads inside and outside the site, measuring and setting out the construction site, determining an excavation line of a foundation pit (7) and marking the excavation line;
s2, forming a fence (1): a plurality of fixed piles are driven vertically and downwards in sequence along the marked excavation line of the foundation pit (7), and adjacent fixed piles are abutted to form a circle of enclosure (1) along the excavation line of the foundation pit (7);
s3, excavating: excavating for many times in the formed enclosure (1) along the vertical direction, wherein the excavation depth is greater than the height of the corner support columns (3) and less than twice the height of the corner support columns (3);
s4, supporting: after each excavation, fixing corner support columns (3) at four corners of the enclosure (1), fixing a plurality of connecting columns (4) on the enclosure (1) between adjacent corner support columns (3), rotating an adjusting rod (53), enabling a first support rod (51) and a second support rod (52) to be away from each other, and enabling the ends, away from each other, of the first support column and the second support column to be respectively and tightly inserted into support holes (34) on the corner support columns (3) and the adjacent connecting columns (4) or the adjacent two connecting columns (4);
s5, casting a protective wall: after the supporting is finished, a circle of template is built in the foundation pit (7), the corner supporting columns (3), the connecting columns (4) and the supporting assemblies (5) are all enclosed between the template and the enclosing baffle (1), then concrete is poured between the template and the enclosing baffle (1), a concrete retaining wall (6) is formed, and after the concrete retaining wall (6) is formed, the next excavation is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011570125.XA CN112627193A (en) | 2020-12-26 | 2020-12-26 | Deep foundation pit open-cut supporting structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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