CN111576444B - Underground supporting structure of foundation pit and construction process thereof - Google Patents
Underground supporting structure of foundation pit and construction process thereof Download PDFInfo
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- CN111576444B CN111576444B CN202010483678.5A CN202010483678A CN111576444B CN 111576444 B CN111576444 B CN 111576444B CN 202010483678 A CN202010483678 A CN 202010483678A CN 111576444 B CN111576444 B CN 111576444B
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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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Abstract
The invention discloses a foundation pit underground supporting structure and a construction process thereof, and the foundation pit underground supporting structure comprises a ground surface, wherein a circular hole is formed in the ground surface, a concrete layer is arranged on the inner wall of the circular hole, a template is arranged on the inner wall of the concrete layer, a steel bolt penetrates through the concrete layer, a supporting mechanism is arranged in the circular hole, a fixing frame is also arranged in the circular hole, a supporting block and a base are arranged on the fixing frame, the base is positioned below the supporting block, the supporting mechanism is placed on the supporting block, and a guardrail is placed on the supporting mechanism. In the implementation process of the invention, the strength of the template can be enhanced, the concrete is prevented from bulging, and the safety guarantee of workers can be increased when the device is used.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a foundation pit underground supporting structure and a construction process thereof.
Background
In the building construction, the pit digging operation is often required, and after the pit is dug, concrete needs to be poured on the pit wall, so that a user can conveniently use the pit.
When pouring the pot hole, directly use the template to carry out preliminary injecing among the prior art, then pour into the concrete between the lateral wall of template and pot hole, wait that the concrete dries the back, demolish the template again.
However, in the construction process of the method, the whole or local fixing strength of the template is not enough, so that the concrete is expanded, the pouring of the side wall of the pit hole is not facilitated, and the use of a user is possibly influenced.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the underground supporting structure of the foundation pit and the construction process thereof, and the problems in the background art are effectively solved.
In order to achieve the purpose, the invention provides the following technical scheme:
a foundation pit underground supporting structure comprises a ground, wherein a circular hole is formed in the ground, a template is further arranged in the space of the circular hole, a certain gap is kept between the template and the inner wall of the circular hole, the gap space is used for pouring concrete to form a concrete layer, a plurality of steel bolts are arranged in the inner space of the circular hole along the radial direction, one ends of the steel bolts penetrate through the template and fix the template, the other ends of the steel bolts are inserted into soil layers on the inner side wall of the circular hole, a fixing frame and a supporting mechanism are further arranged in the inner space of the circular hole, a supporting block and a base which can be used for bearing the supporting mechanism are arranged on the fixing frame, the base is located below the supporting block, and a guardrail is;
furthermore, the supporting mechanism comprises a fixing ring, a fixing rod, a telescopic rod, a top plate and a top fixing block, the fixing frame is cylindrical, the fixing ring is sleeved on the periphery of the fixing frame, the fixing ring is provided with a plurality of fixing rings which are arranged in parallel up and down and are respectively arranged on the supporting block or the base, one end of the fixing rod is fixedly connected with the fixing ring, one end of the telescopic rod is rotatably connected with the other end of the fixing rod, the top plate is fixed at the other end of the telescopic rod, which is far away from the fixing rod, the top fixing block is fixedly connected to one side of the top plate, which is;
furthermore, the fixing ring is annular, a plurality of fixing rods are uniformly distributed outside the fixing ring in a circular array, the template is arc-shaped, the template is provided with insertion holes corresponding to the positions of the steel bolts, the free ends of the steel bolts can penetrate through the insertion holes to fix the template in a hanging manner, one side of the steel bolts close to the template is also provided with template positioning blocks, and the template positioning blocks can ensure that the template and the inner side wall of the circular hole keep a fixed distance;
furthermore, a rotating block is rotatably arranged at one end, away from the fixed ring, of the fixed rod, the telescopic rod is in threaded connection with the rotating block, the rotating block is in threaded connection with the fixed rod, the templates are provided with a plurality of templates which are arranged in parallel and can be enclosed into a cylindrical structure which is axially parallel to the circular hole, the fixed ring is composed of two symmetrical semicircular rings, the joint of the two semicircular rings can be detachably screwed through a screw, an external thread is arranged on the steel bolt, an internal thread is arranged on the template positioning block, and the template positioning block is movably connected with the steel bolt through the threads;
furthermore, a first accommodating groove for accommodating the supporting block is formed in the fixed frame, the supporting block is rotatably connected with the fixed frame, the base is fixedly connected with the fixed frame, a second accommodating groove is formed in the upper surface of the base, a movable block capable of moving up and down and a first spring which is arranged in the second accommodating groove and is positioned at the bottom of the movable block are arranged in the second accommodating groove, when the fixed ring is placed on the base, the movable block is pressed downwards, and the fixed ring is contacted with the upper surface of the base;
furthermore, a third accommodating groove is formed in one side, which is in contact with the fixed frame, of the base, the third accommodating groove is communicated with the second accommodating groove, meanwhile, a fourth accommodating groove communicated with the third accommodating groove is formed in the fixed frame, the fourth accommodating groove is directly communicated with the bottom surface space of the supporting block which is located above the base and close to the bottom surface space, a first poking rod is accommodated in the third accommodating groove and the fourth accommodating groove, the bottom of the movable block is fixedly connected with one end of the bottom of the first poking rod, the other end of the first poking rod is connected with the side surface of the bottom of the supporting block, and when the movable block is not pressed downwards, the first poking rod is pushed against the lower side surface of the supporting block under the thrust of a first spring so that the supporting block adjacent to the base is accommodated in the first accommodating groove;
furthermore, the number of the supporting blocks is two, the two groups of supporting blocks are symmetrically arranged in parallel and sequentially form a first supporting block group and a second supporting block group from top to bottom, the base is positioned below the second supporting block group, the supporting blocks in the same group are positioned in the same horizontal plane, the supporting blocks on the first supporting block group are rotatably connected with the fixing frame through rotating torsion springs, and the supporting blocks can be extended or accommodated in the fixing frame through manually swinging;
further, a base is arranged at the bottom of the circular hole, an anchor rod is fixedly connected to the lower end of the base, a clamping block is fixedly connected to the upper end of the base, and a second clamping groove is formed in the lower end of the fixing frame;
furthermore, a first clamping groove is formed in the upper side surface of the telescopic rod, and clamping teeth matched with the first clamping groove are fixedly connected to the guardrail.
Meanwhile, the construction process for the underground supporting structure of the foundation pit comprises the following steps:
s1, forming a round hole,
specifically, size data of circular holes to be dug are determined, and the circular holes are dug on the ground;
s2, installing a steel bolt,
specifically, the side wall of the circular hole is encircled with a position corresponding to an inserting hole on a template to be installed subsequently, marks are made, a plurality of groups of steel bolts penetrate through the corresponding positions, each group of steel bolts comprises a plurality of steel bolts, each group of steel bolts is kept on the same horizontal plane, and the depth of inserting the steel bolts into the side wall of the circular hole is kept to be the same;
s3, installing the template,
specifically, the template is operated, the free end of the steel bolt penetrates through an insertion hole in the template, which corresponds to the position of the steel bolt, the template is hung on the steel bolt, the template is abutted against a template positioning block on the steel bolt, the position of the template is stably fixed through a plurality of steel bolts, and the template and the side wall of the circular hole are kept at a required fixed interval through the template positioning block;
s4, mounting a base,
specifically, a base is installed at the circle center position of the bottom of the circular hole, and the anchor rod is inserted into the ground to stably fix the base;
s5, mounting a fixed frame,
specifically, the fixing frame is inserted into the base to be fixed;
s6, installing a supporting mechanism,
a plurality of supporting mechanisms are sleeved outside the fixed frame in sequence from the top end of the fixed frame,
specifically, when the first supporting mechanism is installed, all supporting blocks are kept in a furled state, the supporting mechanism is sleeved on the fixed frame from the top of the fixed frame, the supporting mechanism moves downwards along the fixed frame until the supporting mechanism falls on the base, when the supporting mechanism falls on the base, the supporting mechanism presses the movable block to move downwards, the movable block drives the first poking rod to move downwards, the supporting blocks rotate along with the first poking rod and extend out of the fixed frame, so that the fixed blocks above the base and adjacent to the supporting blocks are opened, namely, one group of supporting blocks above the base extends out of the fixed frame, and the group of supporting blocks are marked as the first supporting block;
s7, installing a second supporting mechanism,
specifically, when the second supporting mechanism is installed, the second supporting mechanism is sleeved on the fixed frame from the top of the fixed frame, and moves downwards along the fixed frame to directly drop the second supporting mechanism onto the supporting block of the first supporting block group, namely the second supporting mechanism is installed;
s8, mounting a third supporting mechanism,
specifically, the supporting blocks of the first supporting block group are opened to be in an extending state, the third supporting mechanism is sleeved on the fixing frame from the top of the fixing frame, the second supporting mechanism moves downwards along the fixing frame, and the second supporting mechanism directly falls onto the supporting blocks of the first supporting block group, namely the third supporting mechanism is installed;
s9, fastening the template,
specifically, the telescopic rod is extended outwards in the radial direction by adjusting the rotating block, so that the top plate is driven until the top plate is propped against the surface of the template, and the template is further fixed;
s10, installing a guardrail,
specifically, the guardrails are correspondingly clamped on the telescopic rods;
s11, pouring and grouting
Concrete slurry is injected between the template and the inner side wall of the circular hole;
s12, removing the guardrail and the template
Specifically, after the concrete slurry is solidified, the guardrail is removed, the rotating block is further adjusted, the telescopic rod is further contracted along the radial direction, and then the template is removed;
s13, removing the supporting mechanism and the fixing frame,
specifically, the supporting block for supporting the third supporting mechanism is manually retracted after being lifted away from the third supporting mechanism, then the supporting block is lifted away from the second supporting mechanism, then the supporting block for supporting the second supporting mechanism is automatically retracted while being lifted away from the first supporting mechanism, the first supporting mechanism can also be smoothly adjusted away from the fixed frame, then the connection between the base and the fixed frame is removed, and the fixed frame is lifted away from the fixed frame.
Compared with the prior art, the invention has the beneficial effects that:
1) the formwork can be stably supported and fixed by the supporting mechanism, so that the condition that the formwork is propped open by concrete in the process of pouring the concrete is avoided;
2) through being provided with the steel peg, can convenience of customers carry out preliminary installation to the template fixed, realize fixing the accuracy of template through setting up the template locating piece, moreover after the concrete solidifies, the steel peg is stayed between concrete and ground to the intensity of concrete has been strengthened.
3) Through being provided with the guardrail, easy to assemble, the security performance is higher moreover, realizes the guard action to the personnel.
4) According to the scheme, the template is stably installed, the traditional technical problems are solved, fine construction is further realized, the operation efficiency is improved, the operation precision is also improved, and the construction level and the construction quality are greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the support mechanism combined with the fixing frame;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;
FIG. 4 is an enlarged view of the structure at C in FIG. 2;
FIG. 5 is a schematic view of a connection structure of the telescopic rod and the guardrail;
FIG. 6 is a schematic view of the combination of the ground, concrete layer and form;
fig. 7 is a schematic view of the combination of the fixing frame and the fixing ring.
In the figure: 1. a ground surface; 2. a concrete layer; 3. a template; 4. a steel bolt; 5. a stationary ring; 6. fixing the rod; 7. a telescopic rod; 8. a top plate; 9. a fixed mount; 10. a support block; 11. a guardrail; 12. a top fixing block; 13. a base; 14. an anchor rod; 15. a base; 16. a movable block; 17. a first spring; 18. a first poke rod; 21. rotating the block; 22. fixing teeth; 23. clamping teeth; 24. a first receiving groove; 25. a second receiving groove; 26. a first card slot; 27. a through hole; 28. and (7) clamping blocks.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a foundation pit underground supporting structure which is shown by figures 1-7 and comprises a ground 1, wherein a circular hole is formed in the ground 1, a template 3 is further arranged in the space of the circular hole, a certain gap is kept between the template 3 and the inner wall of the circular hole, the gap space is used for pouring concrete to form a concrete layer 2, a plurality of steel bolts 4 are arranged in the inner space of the circular hole along the radial direction, one ends of the steel bolts 4 penetrate through the template 3 to fix the template 3, the other ends of the steel bolts 4 are inserted into the soil layer on the inner side wall of the circular hole, a fixed frame 9 and a supporting mechanism are further arranged in the inner space of the circular hole, a supporting block 10 and a base 15 which can be used for bearing the supporting mechanism are arranged on the fixed frame 9, the base 15 is positioned below the supporting block 10, and a guardrail 11 is;
specifically, the supporting mechanism includes retainer plate 5, dead lever 6, telescopic link 7, roof 8 and top fixed block 12, mount 9 is cylindricly, and 5 covers of retainer plate are established mount 9 is peripheral, and retainer plate 5 has a plurality of parallel arrangement from top to bottom, and it is arranged in respectively on supporting shoe 10 or base 15, the one end and the 5 fixed connection of retainer plate of dead lever 6, the one end of telescopic link 7 is rotated with the other end of dead lever 6 and is connected, the other end of dead lever 6 is kept away from at telescopic link 7 to roof 8, one side of telescopic link 7 is kept away from at roof 8 to top fixed block 12 rigid coupling, guardrail 11 and telescopic link 7 joint.
The template 3 is integrally positioned and fixed through the steel bolts 4 distributed in the matrix, so that the template 3 is uniformly stressed and supported as a whole, the stability of fixing the template 3 is greatly improved, the stability of later cement pouring is ensured, and the problem of easy deformation in the prior art is solved; furthermore, through the joint with guardrail and telescopic link, replace traditional scaffold frame, the workman carries out safe operation equally, and this has improved the operating efficiency greatly when having ensured operation security.
As preferred, retainer plate 5 is the ring form, the evenly distributed that is circular array outside retainer plate 5 has a plurality of dead levers 6, preferably 6, template 3 is circular-arcly, is provided with the jack that corresponds with 4 positions of steel peg on the template 3, and the free end of steel peg 4 can pass this jack and hang template 3 fixedly, and one side that is close to template 3 on the steel peg 4 still is provided with the template locating piece, and is preferred, the template locating piece specifically overlaps the ring form locating piece on steel peg 4 for the cover, and the template locating piece can be ensured that template 3 and circular hole inside wall keep the fixed spacing.
Preferably, dead lever 6 is kept away from one of retainer plate 5 and is served rotatable turning block 21 that is provided with, threaded connection between telescopic link 7 and the turning block 21, turning block 21 and 6 threaded connection of dead lever, template 3 has a plurality ofly, and a plurality of templates 3 parallel side by side set up can enclose into with circular hole axial direction parallel's drum structure, retainer plate 5 specifically is the semicircle circle of two symmetries again and is constituteed, can carry out the detachable spiro union through the screw in two semicircle ring junctions, be provided with the external screw thread on the steel peg 4, be provided with the internal thread on the template locating piece, template locating piece and 4 screw thread swing joint of steel peg. Through this kind of setting, can be according to the construction needs through rotating the template fixed block and then the position of adjustment template fixed block on steel peg 4 and then the reasonable interval between adjustment template 3 and the circular hole inner wall, improved the ability that overall structure adaptation different operating mode needs.
Preferably, the fixing frame 9 is provided with a first accommodating groove 24 for accommodating the supporting block 10, the supporting block 10 is rotatably connected with the fixing frame 9, and specifically, the supporting block 10 and the fixing frame 9 can be rotatably connected by a torsion spring, a rotating shaft and the like; fixed connection between base 15 and the mount 9 the second has been seted up on base 15 upper surface and has been accomodate the groove 25, accomodate the inslot 25 in the second and be provided with the movable block 16 that can reciprocate and set up and accomodate the first spring 17 of groove 25 in the second and be located the movable block 16 bottom the retainer plate 5 is placed on base 15, movable block 16 is pressed downwards, retainer plate 5 contacts the base 15 upper surface.
Preferably, a third accommodating groove is arranged on one side of the base 15, which is in contact with the fixed frame 9, the third accommodating groove is communicated with the second accommodating groove, meanwhile, a fourth accommodating groove communicated with the third accommodating groove is formed on the fixed frame, the fourth accommodating groove is directly communicated with the bottom space of the supporting block 10 which is positioned above the base 15 and is adjacent to the bottom space, a first poke rod 18 is contained in the third containing groove and the fourth containing groove, the bottom of the movable block 16 is fixedly connected with one end of the bottom of the first poke rod 18, the other end of the first poke rod 18 is connected with the side surface of the bottom of the supporting block 10, when the movable block 16 is not pressed downwards, the first poke rod 18 is pressed against the lower side surface of the supporting block 10 under the pushing force of the first spring 17, the supporting block 10 is pushed upwards, so that the supporting block 10 adjacent to the base 15 is received in the first receiving groove 24.
Preferably, the number of the supporting blocks 10 is two, two groups of supporting blocks are symmetrically arranged in parallel, and are a first supporting block group and a second supporting block group from top to bottom in sequence, the base 15 is located below the second supporting block group, the supporting blocks 10 in the same group are located in the same horizontal plane, wherein the supporting blocks 10 in the first supporting block group are rotationally connected with the fixing frame 9 through rotating torsion springs, and the supporting blocks 10 can be manually swung to extend or be stored in the fixing frame 9.
Preferably, a base 13 is arranged at the bottom of the circular hole, an anchor rod 14 is fixedly connected to the lower end of the base 13, a clamping block 28 is fixedly connected to the upper end of the base 13, and a second clamping groove is formed in the lower end of the fixing frame 9.
Preferably, the upper side surface of the telescopic rod 7 is provided with a first clamping groove 26, and the guardrail 11 is fixedly connected with a latch 23 matched with the first clamping groove 26.
According to the invention, the unique support mechanism is arranged, so that the template can be stably and finely supported and fixed, and the condition that the template is propped open by concrete in the process of pouring the concrete is avoided;
through being provided with the steel peg, can convenience of customers carry out preliminary installation to the template fixed, realize fixing the accuracy of template through setting up the template locating piece, moreover after the concrete solidifies, the steel peg is stayed between concrete and ground to the intensity of concrete has been strengthened.
Through being provided with the guardrail, easy to assemble, the security performance is higher moreover, realizes the guard action to the personnel.
According to the scheme, while the stable installation of the template is ensured, the technical problems in the prior art are solved, the fine construction is further realized, the operation efficiency is improved, the operation precision is also improved, and the construction level and the construction quality are greatly improved.
Meanwhile, the invention also provides a construction process of the underground supporting structure based on the foundation pit supporting pile, which comprises the following steps:
s1, forming a round hole,
specifically, size data of a circular hole to be dug is determined, and the circular hole is dug on the ground 1;
s2, installing the steel bolt 4,
specifically, the side wall of the circular hole is encircled with a position corresponding to an inserting hole on a template 3 to be installed subsequently, marks are made, a plurality of groups of steel bolts penetrate through the corresponding positions, each group of steel bolts comprises a plurality of steel bolts 4, each group of steel bolts 4 is kept on the same horizontal plane, and the depth of inserting the steel bolts into the side wall of the circular hole is kept to be the same;
s3, installing the template 3,
specifically, the template 3 is operated, the free end of the steel bolt 4 penetrates through a jack corresponding to the position of the steel bolt on the template 3, the template 3 is hung on the steel bolt 4, the template 3 is abutted against a template positioning block on the steel bolt 4, the position of the template 3 is stably fixed through a plurality of steel bolts, and the template 3 and the side wall of the circular hole are kept at a required fixed distance through the template positioning block;
s4, mounting the base 13,
specifically, a base 13 is installed at the center of a circle at the bottom of the circular hole, and an anchor rod 14 is inserted into the ground to stably fix the base 13;
s5, mounting a fixed frame,
specifically, the fixing frame 9 is inserted into the base 13 for fixing;
s6, installing a supporting mechanism,
a plurality of supporting mechanisms are sleeved outside the fixed frame 9 from the top end of the fixed frame 9 in sequence,
specifically, when a first supporting mechanism is installed, all supporting blocks 10 are kept in a furled state, the supporting mechanism is sleeved on the fixed frame 9 from the top of the fixed frame 9, and the supporting mechanism moves downwards along the fixed frame 9 until the supporting mechanism falls on the base 15, when the supporting mechanism falls on the base 15, the supporting mechanism presses the movable block 16 to move downwards, the movable block 16 drives the first poke rod 18 to move downwards, the supporting blocks 10 rotate along with the first poke rod to extend out of the fixed frame 9, so that the fixed blocks 10 located above the base 15 and adjacent to the supporting blocks are opened, that is, a group of supporting blocks 10 located above the base 15 extend out of the fixed frame 9, and the group of supporting blocks 10 are marked as a first supporting block;
s7, installing a second supporting mechanism,
specifically, when the second supporting mechanism is installed, the second supporting mechanism is sleeved on the fixed frame 9 from the top of the fixed frame 9, and the second supporting mechanism moves downwards along the fixed frame 9 to directly drop the second supporting mechanism onto the supporting block 10 of the first supporting block group, namely the second supporting mechanism is installed;
s8, mounting a third supporting mechanism,
specifically, the supporting blocks 10 of the first supporting block group are opened to be in an extending state, the third supporting mechanism is sleeved on the fixed frame 9 from the top of the fixed frame 9, the second supporting mechanism moves downwards along the fixed frame 9, and the second supporting mechanism directly falls onto the supporting blocks 10 of the first supporting block group, namely the third supporting mechanism is installed;
s9, fastening the template 3,
specifically, the rotating block 21 is adjusted to enable the telescopic rod 7 to extend outwards in the radial direction, so that the top plate 8 is driven until the top plate 8 is propped against the surface of the template 3, and the template is further fixed;
s10, installing the guardrail 11,
specifically, the guard rail 11 is correspondingly clamped on the telescopic rod 7;
s11, pouring and grouting
Specifically, concrete slurry is injected between the template 3 and the inner side wall of the circular hole;
s12, removing the guardrail 11 and the template 3
Specifically, after the concrete slurry is solidified, the guardrail 11 is removed, the rotating block 21 is further adjusted, the telescopic rod 7 is further contracted along the radial direction, and then the template 3 is removed;
s13, removing the supporting mechanism and the fixing frame 9,
specifically, the supporting block 10 supporting the third supporting mechanism is manually retracted after being lifted away from the third supporting mechanism, then the supporting block 10 is lifted away from the second supporting mechanism, then the supporting block 10 supporting the second supporting mechanism is automatically retracted while being lifted away from the first supporting mechanism, the first supporting mechanism can also be smoothly adjusted away from the fixed frame 9, then the connection between the base 13 and the fixed frame 9 is removed, and the supporting block is lifted away from the fixed frame 9.
Specifically, the supporting block 10 supporting the third supporting mechanism is manually retracted after being lifted away from the third supporting mechanism, then the supporting block 10 is lifted away from the second supporting mechanism, then the supporting block 10 supporting the second supporting mechanism is automatically retracted while being lifted away from the first supporting mechanism, the first supporting mechanism can also be smoothly adjusted away from the fixed frame 9, then the connection between the base 13 and the fixed frame 9 is removed, and the supporting block is lifted away from the fixed frame 9.
In the process of this scheme implementation, the user digs out the cross-section earlier subaerial for circular shape circular hole (being cylindrical construction well), digs the back at circular hole, nail into steel peg 4 on the lateral wall of circular hole, the back is followed closely to steel peg 4, install template 3 and fix a position through the template locating piece, thereby made things convenient for the user to the installation of template, can realize through accurate positioning that the quick installation of template 3 and the circular solid formwork of each convex template 3 component cross-section for circular shape, make ready for concreting. Then, the base 13 is installed at the bottom of the circular hole, the anchor rod 14 at the bottom of the base 13 can enhance the stability of the base 13, the fixed frame 9 is inserted into the fixture block 28, at this time, the fixed frame 9 is fixed, then a user sleeves the supporting mechanism on the fixed frame 9 and puts down, when the supporting mechanism is put on the base 15, the movable block 16 is pressed downwards, the first spring 17 is compressed, the first poke rod 18 moves downwards along with the first poke rod, and at this time, the group of supporting blocks 10 above the base 15 can rotate and extend out of the fixed frame 9. When the second supporting mechanism is put down, the supporting mechanism is in contact with the supporting block 10 which is just fallen down, so that the group of supporting blocks 10 are pressed downwards, the second supporting mechanism is quickly installed, and the third supporting mechanism is further installed by manually adjusting the uppermost supporting block. After the supporting mechanism is placed, the user rotates the rotating block 21, and when the rotating block 21 rotates, the telescopic rod 7 can extend, so that the top plate 8 is pressed against the template 3, and the position of the template 3 is fixed. And further, the overall and comprehensive matrix type stable reinforcement of the template is realized, and the uniform stress and bearing of the template 3 are ensured.
Compared with the traditional scaffold, the whole installation method is an installation mode, and the uniform stress of the template 3 is ensured quickly, simply and finely, so that unexpected technical effects are achieved, and the technical problems in the prior art are solved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a foundation ditch underground supporting structure, includes ground (1), has seted up circular hole on ground (1), its characterized in that: still be provided with template (3) in the circular hole space, template (3) and circular hole inner wall keep certain clearance, and this clearance space is used for concreting in order to form concrete layer (2), radially is provided with a plurality of steel bolts (4) at the inner space of circular hole, template (3) are passed to the one end of steel bolt (4) and are fixed template (3), the other end of steel bolt (4) inserts in the circular hole inside wall soil horizon, still is provided with mount (9) and supporting mechanism at circular hole inner space, be provided with supporting shoe (10) and base (15) that can be used to accept supporting mechanism on mount (9), and base (15) are located the below of supporting shoe (10), guardrail (11) have been placed on the supporting mechanism, supporting mechanism can carry out firm support fixed to the template, supporting mechanism includes retainer plate (5), Dead lever (6), telescopic link (7), roof (8) and top fixed block (12), mount (9) are cylindricly, and retainer plate (5) cover is established mount (9) are peripheral, and retainer plate (5) have a plurality ofly of parallel arrangement from top to bottom, and it is arranged in respectively on supporting shoe (10) or base (15), the one end and retainer plate (5) fixed connection of dead lever (6), the one end of telescopic link (7) is rotated with the other end of dead lever (6) and is connected, the other end of dead lever (6) is kept away from in telescopic link (7) is fixed in roof (8), one side of telescopic link (7) is kept away from in top fixed block (12) rigid coupling in roof (8), guardrail (11) and telescopic link (7) joint.
2. An underground foundation pit supporting structure according to claim 1, wherein: retainer plate (5) are the ring form, the evenly distributed that is circular array outside retainer plate (5) has a plurality of dead levers (6), template (3) are circular-arcly, are provided with the jack that corresponds with steel peg (4) position on template (3), and the free end of steel peg (4) passes this jack and hangs template (3) fixedly, and one side that is close to template (3) on steel peg (4) still is provided with the template locating piece, and the template locating piece is ensured template (3) and circular hole inside wall and is kept the fixed spacing.
3. An underground foundation pit supporting structure according to claim 2, wherein: rotatable turning block (21) that is provided with in one of retainer plate (5) is kept away from in dead lever (6), threaded connection between telescopic link (7) and turning block (21), turning block (21) and dead lever (6) threaded connection, template (3) have a plurality ofly, and a plurality of templates (3) parallel arrangement can enclose into the drum structure with circular hole axial direction parallel, retainer plate (5) specifically have the semicircle circle of two symmetries to constitute, carry out the detachable spiro union through the screw in two semicircle ring junctions, be provided with the external screw thread on steel bolt (4), be provided with the internal thread on the template locating piece, template locating piece and steel bolt (4) screw thread swing joint.
4. An underground foundation pit supporting structure according to claim 3, wherein: offer first groove (24) of accomodating that is used for accomodating supporting shoe (10) on mount (9), supporting shoe (10) is rotatable to be connected with mount (9), fixed connection between base (15) and mount (9) base (15) upper surface has seted up the second and has accomodate groove (25), is provided with movable block (16) that can reciprocate and sets up first spring (17) of accomodating groove (25) in the second and being located movable block (16) bottom in second accomodate groove (25) when retainer plate (5) are placed on base (15), movable block (16) are pressed downwards, retainer plate (5) contact base (15) upper surface.
5. An underground foundation pit supporting structure according to claim 4, wherein: a third accommodating groove is arranged on one side of the base (15) which is contacted with the fixed frame (9), the third accommodating groove is communicated with the second accommodating groove, meanwhile, a fourth accommodating groove communicated with the third accommodating groove is formed on the fixed frame, the fourth accommodating groove is directly communicated with the bottom space of the supporting block (10) which is positioned above the base (15) and is adjacent to the bottom space, a first poke rod (18) is contained in the third containing groove and the fourth containing groove, the bottom of the movable block (16) is fixedly connected with one end of the bottom of the first poke rod (18), the other end of the first poke rod (18) is connected with the bottom side surface of the supporting block (10), when the movable block (16) is not pressed downwards, the first poke rod (18) is pressed against the lower side surface of the supporting block (10) under the thrust of the first spring (17), so that the supporting block (10) adjacent to the base (15) is received in the first receiving groove (24).
6. An underground foundation pit supporting structure according to claim 5, wherein: the quantity of supporting shoe (10) is two sets of, and two sets of supporting shoe parallel symmetry sets up, from the top down is first supporting block group and second supporting block group in proper order, base (15) are located second supporting block group below, and supporting shoe (10) in the same group are located same horizontal plane, and wherein supporting shoe (10) on the first supporting block group rotate with mount (9) through rotating the torsional spring and being connected, and accessible manual swing supporting shoe (10) realize its stretching out or accomodate in mount (9).
7. An underground foundation pit supporting structure according to claim 6, wherein: the bottom of the round hole is provided with a base (13), an anchor rod (14) is fixedly connected to the lower end of the base (13), a clamping block (28) is fixedly connected to the upper end of the base (13), and a second clamping groove is formed in the lower end of the fixing frame (9).
8. An underground foundation pit supporting structure according to claim 7, wherein: first draw-in groove (26) have been seted up to the upside surface of telescopic link (7), rigid coupling has on guardrail (11) with first draw-in groove (26) complex latch (23).
9. A process for constructing an underground supporting structure of a foundation pit according to any one of claims 5 to 8, wherein: the method comprises the following steps:
s1, forming a round hole,
specifically, size data of a circular hole to be dug is determined, and the circular hole is formed in the ground (1);
s2, installing a steel bolt (4),
specifically, the side wall of the circular hole is encircled with a position corresponding to an inserting hole on a template (3) to be installed subsequently, marks are made, a plurality of groups of steel bolts penetrate through the corresponding positions, each group of steel bolts comprises a plurality of steel bolts (4), each group of steel bolts (4) is kept on the same horizontal plane, and the depth of inserting into the side wall of the circular hole is kept to be the same;
s3, installing a template (3),
specifically, the template (3) is operated, the free end of the steel bolt (4) penetrates through an insertion hole in the template (3) corresponding to the position of the steel bolt, the template (3) is hung on the steel bolt (4), the template (3) is abutted against a template positioning block on the steel bolt (4), the position of the template (3) is stably fixed through the plurality of steel bolts, and the template (3) and the side wall of the circular hole are kept at a required fixed distance through the template positioning block;
s4, a mounting base (13),
specifically, a base (13) is installed at the circle center position of the bottom of the circular hole, an anchor rod (14) is inserted into the ground, and the base (13) is stably fixed;
s5, mounting a fixed frame,
specifically, a fixing frame (9) is inserted into a base (13) for fixing;
s6, installing a supporting mechanism,
a plurality of supporting mechanisms are sleeved outside the fixed frame (9) from the top end of the fixed frame (9) in sequence,
specifically, when a first supporting mechanism is installed, all supporting blocks (10) are kept in a furled state, the supporting mechanism is sleeved on a fixed frame (9) from the top of the fixed frame (9), and moves downwards along the fixed frame (9) until the supporting mechanism falls on a base (15), when the supporting mechanism falls on the base (15), the supporting mechanism presses a movable block (16) to move downwards, then the movable block (16) drives a first poke rod (18) to move downwards, the supporting blocks (10) rotate along with the first poke rod to extend out of the fixed frame (9), so that the supporting blocks (10) above and adjacent to the base (15) are opened, namely a group of supporting blocks (10) above the base (15) extend out of the fixed frame (9), and the group of supporting blocks (10) is marked as a first supporting block;
s7, installing a second supporting mechanism,
specifically, when the second supporting mechanism is installed, the second supporting mechanism is sleeved on the fixed frame (9) from the top of the fixed frame (9), and moves downwards along the fixed frame (9), and the second supporting mechanism directly falls onto the supporting block (10) of the first supporting block group, namely the second supporting mechanism is installed;
s8, mounting a third supporting mechanism,
specifically, the supporting block (10) of the first supporting block group is opened to be in an extending state, the third supporting mechanism is sleeved on the fixed frame (9) from the top of the fixed frame (9), the second supporting mechanism moves downwards along the fixed frame (9), and the second supporting mechanism directly falls onto the supporting block (10) of the first supporting block group, namely the third supporting mechanism is installed;
s9, fastening the template (3),
specifically, the telescopic rod (7) is extended outwards in the radial direction by adjusting the rotating block (21), so that the top plate (8) is driven until the top plate (8) is propped against the surface of the template (3), and the template is further fixed;
s10, installing a guardrail (11),
specifically, the guard bar (11) is correspondingly clamped on the telescopic rod (7);
s11, pouring and grouting
Concrete slurry is injected between the template (3) and the inner side wall of the circular hole;
s12, removing the guard rail (11) and the template (3),
specifically, after the concrete slurry is solidified, the guardrail (11) is removed, the rotating block (21) is further adjusted, the telescopic rod (7) is further contracted along the radial direction, and then the template (3) is removed;
s13, removing the supporting mechanism and the fixed frame (9),
specifically, the supporting block (10) for supporting the third supporting mechanism is manually retracted after being lifted away from the third supporting mechanism, then the supporting block (10) for supporting the second supporting mechanism is automatically retracted when the supporting block is lifted away from the first supporting mechanism, the first supporting mechanism can also be smoothly adjusted away from the fixing frame (9), then the connection between the base (13) and the fixing frame (9) is removed, and the supporting block is lifted away from the fixing frame (9).
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| CN202010483678.5A CN111576444B (en) | 2020-06-01 | 2020-06-01 | Underground supporting structure of foundation pit and construction process thereof |
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| CN112681330A (en) * | 2020-11-26 | 2021-04-20 | 国网河北省电力有限公司武安市供电分公司 | Supporting protection reinforcing device for rotary drilling pile |
| CN113026764B (en) * | 2021-03-26 | 2023-03-21 | 中电建生态环境集团有限公司 | Coastal soft soil deep foundation pit supporting structure and construction method |
| CN115198764B (en) * | 2022-07-21 | 2023-08-29 | 中国一冶集团有限公司 | Supporting framework and construction method for lattice column top plate support |
| CN115369891A (en) * | 2022-08-09 | 2022-11-22 | 铜陵学院 | Combined support system for underground engineering construction |
| CN116716898B (en) * | 2023-08-11 | 2023-10-20 | 广东地山基础工程有限公司 | Hole collapse preventing mechanism for ultra-deep rotary pile digging construction and use method thereof |
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| JP4129523B2 (en) * | 2002-07-23 | 2008-08-06 | 有限会社共友建設 | Exterior wall formwork method of concrete underground structure and concrete underground structure |
| KR100984898B1 (en) * | 2008-06-09 | 2010-10-01 | 위성배 | The Construction Method of Descenting Underground Structure |
| CN102817372A (en) * | 2011-06-09 | 2012-12-12 | 五冶集团上海有限公司 | Construction method of underground deep foundation concrete by reverse formworks |
| CN105908752B (en) * | 2016-04-22 | 2020-03-31 | 广州比艾莫信息科技有限公司 | Formwork supporting and stripping system for pouring concrete on side wall and working process of formwork supporting and stripping system |
| CN206173971U (en) * | 2016-10-20 | 2017-05-17 | 中建三局集团有限公司 | Can have enough to meet need unilateral form tie system of use |
| CN209456992U (en) * | 2018-12-11 | 2019-10-01 | 中国建筑第八工程局有限公司 | Low damage unilateral formwork supporting structure under campshed support system |
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Effective date of registration: 20210111 Address after: 510000 room 508, 111 Airport Road, Baiyun District, Guangzhou City, Guangdong Province Applicant after: Guangdong baiyetai Construction Engineering Co.,Ltd. Address before: 518000 24D, Caiyun Pavilion, building 1, Taiyangyu Jiayuan, Huancheng South Road, Longgang District, Shenzhen City, Guangdong Province Applicant before: Fan Chunqing |
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