CN115787661A - Assembled supporting device and method for foundation pit - Google Patents
Assembled supporting device and method for foundation pit Download PDFInfo
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- CN115787661A CN115787661A CN202211417891.1A CN202211417891A CN115787661A CN 115787661 A CN115787661 A CN 115787661A CN 202211417891 A CN202211417891 A CN 202211417891A CN 115787661 A CN115787661 A CN 115787661A
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Abstract
The invention provides an assembled supporting device and method for a foundation pit, which relate to the field of subway foundation pit supporting and comprise a crown beam, a vertical beam, an enclosing purlin and a supporting assembly, wherein an overhanging part with a mounting hole is formed on one side of the axis of the crown beam; the enclosing purlins are provided with brackets for bearing the supporting assemblies, and the supporting assemblies are abutted between the opposite enclosing purlins. To present excavation supporting be difficult to adapt to excavation of foundation ditch and carry out the problem of quick adjustment strut position, set up at the hat roof beam position and encorbelment the component and with erecting the roof beam cooperation, connect through erecting the roof beam and enclose the purlin and adjust enclosing purlin position and corresponding position of strutting the subassembly, the atress component tripod that the purlin was enclosed in the cooperation among the cancellation traditional supporting system, utilize detachable to erect the roof beam, enclose purlin and strut the subassembly, improve whole supporting construction's arrangement speed, and can adapt to the change of strutting the position when the foundation ditch construction.
Description
Technical Field
The invention relates to the field of subway foundation pit supporting, in particular to an assembled foundation pit supporting device and method.
Background
In the subway open cut foundation pit support structure supporting system, the action difference between a fender post (wall) and a conventional foundation pile is large, the conventional foundation pile mainly bears the vertical load transferred by an upper structure, the fender post mainly serves as a member bearing lateral stress, bears the soil pressure and water pressure of the soil body behind a foundation pit and the acting force formed by ground overload, the vertical load mainly serves as the dead weight of a foundation pit supporting system member, the bearing position is generally positioned in the middle of the foundation pile, and the vertical bearing capacity of the pile is exerted to a small extent.
Steel shotcrete component is mainly through drilling on fender pile (wall) upper portion when steel braced system erects, the bar planting, set up the tripod, the steel purlin sets up on the tripod, push up the steel shotcrete in the fender pile top through supporting prestressing force, it is fixed to support the end to need set up expansion bolts or bar planting alone in fender pile (wall) for preventing that the steel shotcrete drops, the work procedure is loaded down with trivial details, high in labor strength, tripod bar planting is more in quantity, it is great to follow-up earthwork excavation influence, and fender pile (wall) bar planting drilling position conflicts with fender pile (wall) atress reinforcing bar easily, the bar planting quality is difficult to guarantee, braced system has the potential safety hazard. The steel enclosing purlins in the subway foundation pit supporting system are required to be arranged continuously, the steel enclosing purlins are connected in a batten plate welding mode, welding efficiency is low, labor intensity is high, high-altitude welding operation quality is not easy to guarantee, and the continuity of the supporting system is not easy to guarantee.
Along with the progress of foundation pit construction, the positions of supporting structures such as a steel support, a steel enclosing purlin and the like need to be adjusted, the requirements of supporting strength and supporting positions are met, in the process of adjusting the supporting structures, the original tripod structure needs to be dismantled, and a new tripod is arranged on a supporting pile to realize the installation of the supporting structures, so that the efficiency is low due to a large number of repeated operations in the process, a large amount of waste of materials is caused, the risk of influencing the stressed structure of the enclosing pile (wall) exists due to multiple drilling and bar planting, and the overall stability and safety of the foundation pit in the supporting process are difficult to ensure; although the existing supporting structure can be adjusted within a certain range, the supporting structure aims to achieve a good supporting stress state in the area through fine adjustment of the position of the supporting structure, and cannot adapt to large-range position change in the process of foundation pit construction.
Disclosure of Invention
The invention aims to provide a foundation pit assembled supporting device and a foundation pit assembled supporting method aiming at the defects in the prior art.
The invention aims to provide an assembled supporting device for a foundation pit, which adopts the following technical scheme:
the supporting structure comprises a crown beam, vertical beams, an enclosing purlin and a supporting assembly, wherein an overhanging part with a mounting hole is formed on one side of the axis of the crown beam, the vertical beams axially penetrate through the mounting hole, the overhanging part is provided with a locking assembly so as to lock the positions of the vertical beams after moving relative to the overhanging part, and the enclosing purlin is connected between the adjacent vertical beams; the enclosing purlins are provided with brackets for bearing the supporting assemblies, and the supporting assemblies are abutted between the opposite enclosing purlins.
Furthermore, the overhanging part protrudes out of the side face of the crown beam, the shape of the mounting hole is matched with that of the vertical beam, and the vertical beam and the mounting hole form a moving pair along the axial direction of the vertical beam.
Furthermore, the vertical beam is provided with a plurality of limiting holes at intervals along the axial direction, and at least one limiting hole is matched with the locking component.
Further, the mounting hole lateral wall is equipped with a plurality of connecting holes that run through the portion of encorbelmenting, and the connecting hole passes through locking Assembly and spacing hole cooperation.
Furthermore, the end part of the enclosing purlin is provided with a butt joint plate, the enclosing purlin is connected with the vertical beam through the butt joint plate matched with the connecting piece, and the axis of the enclosing purlin is perpendicular to the axis of the vertical beam.
Furthermore, along enclose the purlin axial, enclose and be provided with a plurality of bearing holes on the purlin, at least one bracket cooperation bearing hole is connected in enclosing the purlin, and the bracket connection has the vaulting pole, and vaulting pole one end connecting bracket, the other end run through and enclose the purlin after connect the top support, the top support butt in foundation ditch lateral wall.
Further, the bracket includes layer board and baffle, and the bracket is the bending plate that is the L form, and the bending plate both ends are the connecting plate respectively, form spacing recess jointly, strut the subassembly butt in spacing recess.
The second purpose of the invention is to provide an assembly type supporting method for a foundation pit, which utilizes the assembly type supporting device for the foundation pit, and comprises the following steps:
arranging a crown beam at the top of the foundation pit support pile, and connecting one end of a vertical beam with one end of a surrounding purlin after penetrating through the mounting hole;
at least one enclosing purlin is connected between adjacent vertical beams, and a supporting assembly is arranged between the enclosing purlins in opposite positions;
adjusting the relative positions of the vertical beams and the mounting holes according to the excavation position of the foundation pit and locking the vertical beams, the enclosing purlins and the supporting components to be synchronously lifted or lowered so as to realize the supporting of the side wall of the foundation pit;
after the foundation pit is used, the crown beam, the vertical beam, the enclosing purlin and the supporting assembly are detached and assembled for use in the next foundation pit.
Furthermore, the crown beam and the overhanging part arranged on the crown beam are integrally poured, the mounting hole and the vertical beam are coaxially arranged, and the position of the vertical beam is axially adjusted to drive the enclosing purlin and the supporting assembly to move to a required supporting position.
Furthermore, when the construction method is suitable for the excavation progress of the foundation pit to lift or lower the vertical beams, all the vertical beams in the foundation pit are synchronously moved, and the positions of the adjusted surrounding purlin and the supporting assembly are detected.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) To present excavation supporting be difficult to adapt to excavation of foundation ditch and carry out the problem of quick adjustment strut position, set up at the hat roof beam position and encorbelment the component and with erecting the roof beam cooperation, connect through erecting the roof beam and enclose the purlin and adjust enclosing purlin position and corresponding position of strutting the subassembly, the atress component tripod that the purlin was enclosed in the cooperation among the cancellation traditional supporting system, utilize detachable to erect the roof beam, enclose purlin and strut the subassembly, improve whole supporting construction's arrangement speed, and can adapt to the change of strutting the position when the foundation ditch construction.
(2) The top of the supporting pile is provided with the crown beam with the overhanging part, the steel supporting pile in the original supporting system bears the main stress component tripod to be cancelled, the detachable I-shaped steel or the section steel connecting piece is adopted as a vertical beam to replace a triangular support, the self-gravity acting point of the supporting system is moved to the crown beam of the foundation pit supporting pile, the vertical compressive stress on the upper part of the supporting pile is improved, and the risk caused by the tripod steel bar planting and the anti-falling device steel bar planting of the original supporting system is reduced.
(3) The whole supporting device adopts an assembled component, the enclosing purlin and the vertical beam of the supporting device are continuously arranged in a splicing mode through the connecting piece, the risk caused by welding work is reduced, the working efficiency is improved, the quality risk in the welding and bar planting processes is avoided, the component of the supporting device can be repeatedly recycled after being subsequently dismantled, the utilization rate of resources is improved, and the waste of the resources is reduced.
(4) The hoisting component that encorbelments and hat roof beam cast-in-place, the hoisting node upper portion of encorbelmenting sets up reservation mounting hole and fixed connection hole, will enclose the purlin vertical connecting piece according to the design needs and stretch into the foundation ditch inside through reserving the mounting hole, according to steel shotcrete design elevation, enclose the purlin with the steel through sealing the steel sheet and enclosing purlin vertical connecting piece quick fixation.
(5) The locking piece is installed at the position of the overhanging part, after the relative position of the vertical beam and the overhanging part is adjusted, the relative position of the vertical beam and the overhanging part is locked, so that the positions of the surrounding purlin and the supporting assembly which are connected on the vertical beam are locked, and in the process of excavating the foundation pit, the position of the vertical beam is adjusted to enable the surrounding purlin and the supporting assembly to move along with the movement of the vertical beam, so that the change of the required supporting position of the foundation pit is adapted.
(6) Compare in traditional adjustable supporting construction, form sliding connection through the cooperation that sets up mounting hole on perpendicular roof beam and the hat roof beam for whole accommodation process can adapt to the altitude variation on a large scale in the foundation ditch excavation process, makes whole supporting construction's position change along with the foundation ditch, sets up the perpendicular roof beam of side position with the load through shifting to the fender pile, keeps good atress, avoids destroying original supporting construction.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a crown beam and an overhanging portion in embodiment 1 or 2 of the present invention;
fig. 2 is a schematic side view of a crown beam and an overhang in embodiment 1 or 2 of the present invention;
FIG. 3 is a schematic structural view of a vertical beam in embodiment 1 or 2 of the present invention;
FIG. 4 is a schematic cross-sectional view of a vertical beam in embodiment 1 or 2 of the present invention;
fig. 5 is a schematic structural view of a purlin according to embodiment 1 or 2 of the present invention;
fig. 6 is a schematic side view of a purlin according to embodiment 1 or 2 of the present invention;
FIG. 7 is a schematic structural view of a bracket according to embodiment 1 or 2 of the present invention;
FIG. 8 is a schematic structural view of a connecting bolt according to embodiment 1 or 2 of the present invention;
fig. 9 is a schematic structural view of a stay bar in embodiment 1 or 2 of the present invention.
In the figure, 1 overhanging part, 2 mounting holes, 3 connecting holes, 4 vertical beams, 5 bolt holes, 6 surrounding purlins, 7 bearing holes, 8 sealing steel plates, 9 brackets, 10 connecting bolts, 11 support rods, 12 jacking supports, 13 crown beams, 14 support piles and 15 support components.
Detailed Description
Example 1
In an exemplary embodiment of the present invention, an assembled foundation pit supporting apparatus is shown in fig. 1-9.
Be difficult to adapt to excavation of foundation ditch to carry out the problem of quick adjustment strut position to present excavation, a foundation ditch assembled supporting device is provided, 13 position settings at the hat roof beam encorbelment the component and with erect roof beam 4 cooperation, connect through erecting roof beam 4 and enclose purlin 6 and adjust enclosing purlin 6 position and the position that corresponds strut assembly 15, the cooperation encloses the atress component tripod of purlin 6 among the cancellation traditional supporting system, utilize detachable to erect roof beam 4, enclose purlin 6 and strut assembly 15, improve whole supporting construction's the speed of arranging, and can adapt to the change of strut position when the foundation ditch construction.
In this embodiment, the vertical beam 4 and the surrounding purlin 6, and the surrounding purlin 6 and the bracket 9 which form the foundation pit assembled supporting device are spliced by connecting pieces, and the bracket 9 and the supporting component 15 are clamped and abutted to jointly realize continuous arrangement, so that the welding workload is reduced.
Through the use of foundation ditch assembled supporting device, can be along with the excavation depth increase of foundation ditch and the position of the whole supporting construction of continuous adjustment, erect roof beam 4, enclose purlin 6, supporting component 15 and in the vertical whole or local vertical removal of foundation ditch, the required position of adaptation foundation ditch changes, need not many places, exert atress members such as tripod many times. And after the main body structure is completed in the foundation pit, the vertical beam 4, the enclosing purlin 6 and the supporting assembly 15 can be detached, and the next foundation pit can be repeatedly recycled.
Specifically, the assembled supporting device for the foundation pit mainly comprises a crown beam 13, a vertical beam 4, an enclosing purlin 6 and a supporting assembly 15, wherein the crown beam 13 can be of a prefabricated structure and can also be cast in situ, and the crown beam 13 is arranged on a supporting pile 14 of the foundation pit; an overhanging part 1 with a mounting hole 2 is formed on one side of the axis of the crown beam 13, the overhanging part 1 is positioned on one side of the crown beam 13 far away from the wall of the foundation pit, the vertical beam 4 axially penetrates through the mounting hole 2, a locking assembly is arranged on the overhanging part 1 to lock the position of the vertical beam 4 after moving relative to the overhanging part 1, and an enclosing purlin 6 is connected between adjacent vertical beams 4; the enclosing purlins 6 are provided with brackets 9 for bearing supporting assemblies 15, and the supporting assemblies 15 are abutted between the opposite enclosing purlins 6.
As shown in fig. 1, a convex structure is arranged on the crown beam 13 to form an overhanging portion 1, the overhanging portion 1 is used as a hoisting node, and is manufactured by adopting the same structure as the main body of the crown beam 13, in this embodiment, the length of the overhanging portion extending out of the crown beam 13 is 600mm to 1000mm, and the crown beam 13 is also used as a building envelope of the foundation pit after being installed on the foundation pit support pile 14.
The cantilever part 1 is provided with a mounting hole 2, a gap is reserved between the mounting hole 2 and a pile wall of the main body enclosure structure, so that after the vertical beam 4 is mounted, the vertical beam 4 can be spaced from the main body enclosure structure in a foundation pit, the interference between the vertical beam 4 and the enclosure structure in the position adjusting process is avoided, a connecting hole 3 is reserved on the side wall of the mounting hole 2, and the connecting hole 3 penetrates through the cantilever part 1 and is used for being matched with a locking assembly to connect the vertical beam 4.
The top of the supporting pile 14 is provided with the crown beam 13 with the overhanging part 1, the steel supporting pile 14 in the original supporting system bears the main stress member tripod to be cancelled, a detachable I-shaped steel or section steel connecting piece is adopted as a vertical beam 4 to replace a triangular support, the self-weight acting point of the supporting system is moved to the top beam 13 of the foundation pit supporting pile 14, the vertical compressive stress on the upper part of the supporting pile 14 is improved, and the risk caused by the tripod steel bar planting and the anti-falling device steel bar planting of the original supporting system is reduced.
As shown in fig. 2, the reserved mounting hole 2 and the main structure of the crown beam 13 serving as the envelope structure are arranged at an interval, in this embodiment, the size of the reserved mounting hole 2 is 300mm to 400mm, which may be the diameter of the mounting hole 2 with a circular cross section or the side length of a rectangular cross section; the distance between the mounting hole 2 and the enclosure structure pile wall is 100-300 mm, the diameter of the connecting hole 3 is 20-32 mm, and the distance between the bolt holes 5 is 100-250 mm. It is understood that in other embodiments, the parameter specifications may be adjusted according to requirements, so as to meet the requirements of operability, strength, and the like.
As shown in fig. 3, the vertical beam 4 is made of steel structural sections such as i-beams or section steels, and the number of the i-beams is configured according to the number of surrounding purlins 6 and supporting assemblies which are hoisted in a matched manner by taking the i-beams as the vertical beam 4 as an example; in order to facilitate the connection of the vertical beam 4 with the overhanging part 1 and the surrounding purlin 6, bolt holes 5 are arranged on the I-shaped steel web plate, so that the vertical beam can be conveniently butted with the end part of the surrounding purlin 6; two rows of bolt holes 5 are formed in the flange of the I-shaped steel, and the I-shaped steel is convenient to be matched with the mounting hole 2 of the cantilever part 1.
With reference to fig. 2 and 3, the connecting holes 3 on the overhanging part 1 and the bolt holes 5 arranged on the flange of the I-steel vertical beam 4 keep the same horizontal and vertical intervals, and the bolt holes 5 arranged on the I-steel web plate and the reserved bolt holes 5 at the end part of the purlin 6 keep the same horizontal and vertical intervals.
Adopt the cooperation of locking Assembly between connecting hole 3 and the 4 bolt holes 5 of perpendicular roof beam, the locking Assembly can choose for use structure such as round pin, reinforcing bar, voussoir, threaded rod, can pass connecting hole 3 and bolt hole 5 with the reinforcing bar is coaxial, makes it form pinhole cooperation structure, locks connecting hole 3 and bolt hole 5 position, and is same, locks the relative position of portion 1 of encorbelmenting and perpendicular roof beam 4.
When adjusting the relative position of perpendicular roof beam 4 and the portion 1 of encorbelmenting, take out the locking subassembly earlier, unblock perpendicular roof beam 4 and the portion 1 of encorbelmenting, then adjust perpendicular roof beam 4 position to the setting value, through the locking subassembly with its position after adjusting relockingly.
Install the locking piece in portion 1 position of encorbelmenting, after the adjustment is erected roof beam 4 and the relative position of portion 1 of encorbelmenting, lock erecting roof beam 4 and the relative position of portion 1 of encorbelmenting to the position of connecting on erecting the roof beam 4 and enclosing purlin 6, strut subassembly 15 locks, at the excavation in-process of foundation ditch, adjusts and erects the roof beam 4 position and makes and enclose purlin 6, strut subassembly 15 and remove along with erecting the removal of roof beam 4, adapts to the required change of strutting the position of foundation ditch.
As shown in fig. 4, in the present embodiment, the bolt holes 5 arranged in the vertical beam 4 have a diameter of 20mm to 32mm, and the bolt holes 5 are spaced at intervals of 100mm to 250mm. The axial length of a single vertical beam 4 is 1.5-6.0 m, when the length of the single vertical beam 4 is not enough to meet the requirement, a plurality of vertical beams 4 can be butted to meet the requirement of the depth of the foundation pit, and in addition, the number of other length specifications can be replaced; but in order to keep the overall stability of the supporting structure, the axial length of the vertical beam 4 is more conveniently prolonged by butting, and the suspension effect of the vertical beam 4 on the surrounding purlin 6 and the supporting assembly 15 below is kept continuously in the construction process.
As shown in fig. 5, the end of the purlin 6 is provided with a butt plate, the purlin 6 is connected with the vertical beam 4 through the butt plate matching connection piece, and the axis of the purlin 6 is perpendicular to the axis of the vertical beam 4. The enclosing purlin 6 is formed by welding and processing section steel with the same model and specification through flanges, and the flange position of the section steel is provided with a bearing hole 7 for connecting a bracket 9. The butt-joint plates connected with the two axial ends of the surrounding purlin 6 form a sealing steel plate 8 of the surrounding purlin 6.
In this embodiment, the diameter of the bearing hole 7 is 30mm to 50mm, a thread is arranged in the bearing hole 7, and the bearing hole 7 penetrates through the flange of the section steel in the axial direction. The flange of the section steel at the middle position of the surrounding purlin 6 is provided with bolt holes 5, the aperture of the bolt holes 5 is 20-32 mm, the distance between the bolt holes 5 is 100-250 mm, and the bolt holes 5 penetrate through two sides of the flange of the section steel.
As shown in fig. 6, the length of a single section of the standard section of the purlin 6 is 3.0-6.0 m, the thickness of a butt joint plate serving as a sealing steel plate 8 is 10-20 mm, two rows of bolt holes 5 are arranged on the butt joint plate, the diameters of the bolt holes 5 are 20-32 mm, the distance between the bolt holes 5 is 100-250 mm, and the bolt holes 5 are kept to be consistent with the horizontal and vertical distances between the bolt holes 5 arranged on the flange of the vertical beam 4.
Certainly, in other embodiments, above-mentioned purlin 6, butt plate, bearing hole 7, bolt hole 5's specification can be adjusted according to the demand, can satisfy actual intensity and installation demand can.
With reference to fig. 6 and 7, the bearing hole is connected with a bracket 9, and the bracket 9 is used as a bearing structure of the support assembly 15. Follow enclose purlin 6 axial, enclose and be provided with a plurality of bearing hole 7 on the purlin 6, at least one bracket 9 cooperation bearing hole 7 is connected in enclosing purlin 6, and bracket 9 is connected with vaulting pole 11, and 11 one ends of vaulting pole connect bracket 9, and the other end runs through and encloses and connect top support 12 behind purlin 6, and top support 12 butt is in the foundation ditch lateral wall.
The bracket 9 comprises a supporting plate and a baffle plate, the bracket 9 is an L-shaped bending plate, two ends of the bending plate are respectively connected with the baffle plate to form a limiting groove together, and the supporting assembly 15 is abutted against the limiting groove; specifically, the bracket 9 is formed by welding steel plates, the steel plates are arranged on two sides and at the bottom of the bracket 9, and the bearing capacity of the height of the welding line meets the bearing requirement.
In this embodiment, the thickness of the steel plate for manufacturing the bending plate and the baffle is 10 mm-20 mm, the middle part of the steel plate is provided with bolt holes 5, the aperture is 20 mm-32 mm, the distance between the bolt holes 5 is 100 mm-250 mm, the bolt holes are consistent with the horizontal and vertical distances of the section steel flange arranged at the middle part of the surrounding purlin 6, and accurate butt joint is realized.
As shown in fig. 8, the same specification is adopted for the connecting bolt 10 fitted into the bolt hole 5. In the embodiment, the connecting bolt 10 is a high-strength bolt, and both ends of the connecting bolt are provided with nuts with the diameter of 16 mm-32 mm; in other embodiments, other connecting bolts 10, such as single-side bolts, may be used as required.
As shown in fig. 9, in the structure in which the stay bar 11 is matched with the jacking 12, the stay bar 11 is used as a support bar structure for abutting against the bracket 9 and the surrounding purlin 6, the stay bar 11 is made of a steel bar or a steel pipe with a diameter of 30 mm-50 mm, one end of the stay bar is provided with a thread, the jacking 12 is arranged at the top of the stay bar, and the jacking 12 is made of a steel member and has sufficient rigidity.
To strutting assembly 15, can choose for use current steel strut assembly, the bracket 9 of reserving can the adaptability cooperation with steel strut assembly tip, guarantees the intensity of its cooperation installation.
Example 2
In another embodiment of the present invention, as shown in fig. 1-8, a method of fabricated retaining and protecting a foundation pit is provided.
The fabricated foundation pit supporting method is the fabricated foundation pit supporting method in the embodiment 1, and comprises the following steps of:
a crown beam 13 is arranged at the top of a foundation pit supporting pile 14, the crown beam 13 and an overhanging part 1 arranged on the crown beam are integrally cast, one end of a vertical beam 4 penetrates through a mounting hole 2 and then is connected with one end of an enclosing purlin 6, the mounting hole 2 and the vertical beam 4 are coaxially arranged, and the position of the vertical beam 4 is axially adjusted to drive the enclosing purlin 6 and a supporting component 15 to move to a required supporting position;
at least one enclosing purlin 6 is connected between the adjacent vertical beams 4, and a supporting assembly 15 is arranged between the enclosing purlins 6 in opposite positions;
adjusting and locking the relative positions of the vertical beams 4 and the mounting holes 2 according to the excavation position of the foundation pit, so that the vertical beams 4, the enclosing purlins 6 and the supporting assemblies 15 are lifted or lowered synchronously, when the vertical beams 4 are lifted or lowered in accordance with the excavation progress of the foundation pit, all the vertical beams 4 in the foundation pit are moved synchronously, and the positions of the adjusted enclosing purlins 6 and the supporting assemblies 15 are detected, so that the side walls of the foundation pit are supported;
after the foundation pit is used, the crown beam 13, the vertical beam 4, the enclosing purlin 6 and the supporting assembly 15 are detached, and the next foundation pit is assembled for use.
According to the supporting method, the overhanging part 1 is arranged at the top of the supporting pile 14 and serves as a hoisting node, the overhanging part 1 and the crown beam 13 are cast in place, the overhanging part 1 is provided with the reserved mounting hole 2 and the fixed connecting hole 3, the vertical beam 4 extends into the foundation pit through the reserved mounting hole 2 according to design requirements, and the enclosing purlin 6 is quickly fixed with the vertical beam 4 through the sealing steel plate 8 according to the design elevation of the supporting component 15.
According to supporting component 15 lay the interval and setting up bracket 9 enclosing purlin 6 top, through reserving bolt hole 5 and enclosing purlin 6 and linking to each other, set up the bearing rod, the bearing rod is screwed, link up and enclose purlin 6, installs good top and hold in the palm 12. And (3) hanging the support assembly 15 on the bracket 9, screwing the top support 12, and applying prestress to complete erection of the support assembly 15.
And (3) combining hoisting equipment arranged near the overhanging part 1 to realize vertical movement of the completed local or integral supporting structure according to the requirement of foundation pit excavation, and finally fixing the relative positions of the overhanging part 1 and the vertical beam 4 by adopting bolts or connecting pieces to complete erection of the foundation pit assembled supporting device.
The assembled supporting device for the foundation pit can be dismantled in sections according to the construction requirements of a main structure, the corresponding vertical beam 4, the surrounding purlin 6, the supporting assembly 15 and other components can be reused, the method can realize quick assembly and repeated recycling of the components, welding is not needed in the construction site of the whole process, bar planting operation is carried out, the standardized operation efficiency is high, environmental pollution is avoided, the components can be repeatedly recycled after being dismantled, the construction cost is reduced, and resource waste is avoided.
It should be pointed out that, compare in traditional adjustable supporting construction, form sliding connection through setting up the cooperation of erecting roof beam 4 and mounting hole 2 on the hat roof beam 13 for whole accommodation process can adapt to the altitude variation on a large scale in the excavation of foundation ditch, makes whole supporting construction's position change along with the foundation ditch, sets up perpendicular roof beam 4 at the side position with the load through shifting to fender pile 14, keeps good atress, avoids destroying original supporting construction.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The assembled supporting device for the foundation pit is characterized by comprising a crown beam, a vertical beam, an enclosing purlin and a supporting assembly, wherein an overhanging part with a mounting hole is formed on one side of the axis of the crown beam, the vertical beam axially penetrates through the mounting hole, a locking assembly is arranged on the overhanging part to lock the position of the vertical beam after moving relative to the overhanging part, and the enclosing purlin is connected between the adjacent vertical beams; the enclosing purlins are provided with brackets for bearing the supporting assemblies, and the supporting assemblies are abutted between the opposite enclosing purlins.
2. The assembled supporting device for a foundation pit as claimed in claim 1, wherein the overhanging part protrudes from the side surface of the crown beam, the shape of the mounting hole is matched with that of the vertical beam, and the vertical beam and the mounting hole form a moving pair along the axial direction of the vertical beam.
3. The assembled support device for foundation pits of claim 1, wherein the vertical beam is provided with a plurality of limiting holes at intervals along the axial direction, and at least one limiting hole is matched with the locking component.
4. The assembled supporting device for foundation pit as claimed in claim 3, wherein the side wall of the mounting hole is provided with a plurality of connecting holes penetrating the overhanging part, and the connecting holes are matched with the limiting holes through locking components.
5. The assembled supporting device for the foundation pit as claimed in claim 1, wherein the end of the enclosing purlin is provided with a butt plate, the enclosing purlin is connected with the vertical beam through a butt plate matching connecting piece, and the axis of the enclosing purlin is perpendicular to the axis of the vertical beam.
6. The assembled supporting device for the foundation pit as claimed in claim 1, wherein a plurality of bearing holes are formed in the enclosing purlin along the axial direction of the enclosing purlin, at least one bracket is connected to the enclosing purlin in a matched mode and is connected with a supporting rod, one end of the supporting rod is connected with the bracket, the other end of the supporting rod penetrates through the enclosing purlin and is connected with a jacking support, and the jacking support abuts against the side wall of the foundation pit.
7. The assembled supporting device for the foundation pit as claimed in claim 1, wherein the bracket comprises a supporting plate and a baffle plate, the bracket is an L-shaped bent plate, two ends of the bent plate are respectively connected with the baffle plate to form a limiting groove together, and the supporting component abuts against the limiting groove.
8. An assembly support method for an excavation pit, using the assembly support apparatus for an excavation pit according to any one of claims 1 to 7, comprising the steps of:
arranging a crown beam at the top of the foundation pit support pile, and connecting one end of a vertical beam with one end of a surrounding purlin after penetrating through the mounting hole;
at least one enclosing purlin is connected between adjacent vertical beams, and a supporting assembly is arranged between the enclosing purlins in opposite positions;
adjusting the relative positions of the vertical beams and the mounting holes according to the excavation position of the foundation pit and locking the vertical beams, the enclosing purlins and the supporting components to be synchronously lifted or lowered so as to realize the supporting of the side wall of the foundation pit;
after the foundation pit is used, the crown beam, the vertical beam, the enclosing purlin and the supporting assembly are detached and assembled for use in the next foundation pit.
9. An assembled supporting method for foundation pit as claimed in claim 8, wherein the said top beam is cast integrally with the overhanging part on it, the installing hole is coaxial with the vertical beam, and the position of vertical beam is axially adjusted to drive the surrounding purlin and supporting assembly to move to the required supporting position.
10. An assembled supporting method for a foundation pit as claimed in claim 8, wherein when the vertical beams are raised or lowered in response to the progress of excavation of the foundation pit, all the vertical beams in the foundation pit are moved synchronously, and the positions of the adjusted purlins and supporting members are detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211417891.1A CN115787661B (en) | 2022-11-14 | 2022-11-14 | Foundation pit assembled supporting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211417891.1A CN115787661B (en) | 2022-11-14 | 2022-11-14 | Foundation pit assembled supporting device and method |
Publications (2)
| Publication Number | Publication Date |
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| CN115787661A true CN115787661A (en) | 2023-03-14 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6093474B1 (en) * | 2016-09-13 | 2017-03-08 | ヒロセ株式会社 | Cut beam material and beam support |
| CN107964970A (en) * | 2017-11-30 | 2018-04-27 | 同济大学 | A kind of double steel sheet-pile cofferdam slidingtype reinforcing pull rod system |
| CN109594566A (en) * | 2018-12-28 | 2019-04-09 | 中国十九冶集团有限公司 | Quick mounting structure of steel shotcrete |
| CN213204145U (en) * | 2020-08-24 | 2021-05-14 | 湖北郢都水利水电建设有限公司 | Foundation pit excavation steel sheet pile supporting structure |
| CN216108520U (en) * | 2021-08-17 | 2022-03-22 | 中国一冶集团有限公司 | Install and tear steel sheet pile purlin open fast |
| CN217378844U (en) * | 2022-03-05 | 2022-09-06 | 三明市水利水电工程有限公司 | Larsen steel sheet pile supporting construction |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6093474B1 (en) * | 2016-09-13 | 2017-03-08 | ヒロセ株式会社 | Cut beam material and beam support |
| CN107964970A (en) * | 2017-11-30 | 2018-04-27 | 同济大学 | A kind of double steel sheet-pile cofferdam slidingtype reinforcing pull rod system |
| CN109594566A (en) * | 2018-12-28 | 2019-04-09 | 中国十九冶集团有限公司 | Quick mounting structure of steel shotcrete |
| CN213204145U (en) * | 2020-08-24 | 2021-05-14 | 湖北郢都水利水电建设有限公司 | Foundation pit excavation steel sheet pile supporting structure |
| CN216108520U (en) * | 2021-08-17 | 2022-03-22 | 中国一冶集团有限公司 | Install and tear steel sheet pile purlin open fast |
| CN217378844U (en) * | 2022-03-05 | 2022-09-06 | 三明市水利水电工程有限公司 | Larsen steel sheet pile supporting construction |
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| CN115787661B (en) | 2023-07-04 |
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