CN111424676A - Main frame beam support changing structure and construction method - Google Patents
Main frame beam support changing structure and construction method Download PDFInfo
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- CN111424676A CN111424676A CN202010243765.3A CN202010243765A CN111424676A CN 111424676 A CN111424676 A CN 111424676A CN 202010243765 A CN202010243765 A CN 202010243765A CN 111424676 A CN111424676 A CN 111424676A
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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
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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Abstract
The invention discloses a main frame beam support changing structure and a construction method, wherein the main frame beam support changing structure comprises an envelope structure, an inner support structure, a main frame structure and a support changing structure, and a maintenance pile is engaged with a pile to form a closed independent underground space; the inner support structure supports the enclosure structure before constructing the main frame structure; the main body frame structure comprises frame columns, frame beams, a structural plate and a basement outer wall, wherein the frame beams comprise transverse frame beams and longitudinal frame beams; the support changing structure is arranged at the position of the transverse frame beam interfering with the steel upright column for changing the support, and comprises an inclined support changing beam and a horizontal support changing beam. According to the support-replacing structural system, when the positions of the steel upright posts and the frame beam are overlapped and the frame beam cannot be used as a support-replacing beam to transfer the lateral pressure of the foundation pit, the support-replacing beams are symmetrically constructed on two sides of the frame beam and used as the support-replacing beams, the requirements of safety and stability of the foundation pit are met, and meanwhile, the cost is saved to the maximum extent.
Description
Technical Field
The invention relates to the technical field of support changing construction, in particular to a main frame beam support changing structure and a construction method.
Background
The support dismantling and replacing construction technology principle comprises two construction steps of support dismantling and replacing, support replacing is firstly constructed, then support dismantling is constructed, and the requirement that lateral pressure transmission of a foundation pit support structure is the core of the support dismantling and replacing construction technology is met. In the current support construction technology of dismantling and replacing, the distance between the basement outer wall and the enclosure structure is short, the depth of a foundation pit is deep, and an operator cannot change the support construction in a narrow dark space, so that the operation of the operator is influenced, the construction quality of the support member cannot be guaranteed, and the overall construction progress is also influenced. In order to solve the technical problem, application number 201910635034.0 discloses a deep foundation pit inner support assembly type support changing construction tool and a construction method, the tool comprises a support pile, an upper force transmission belt, a fertilizer groove, a lower force transmission belt, an outer wall structure, a base plate, a pre-dismantling inner support, an upper pre-added steel pipe assembly, an assembled inclined support, a lower pre-processed steel pipe assembly and a concrete pier, the components are assembled into a single complete force transmission belt, the construction period is long when the type of force transmission belt is arranged, the material consumption is high, the steel pipe assembly cannot be used as a permanent support changing structure, the steel pipe assembly type support changing construction tool can only be applied to the position of the foundation pit base plate, the application range is limited, and.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a main frame beam support changing structure and a construction method, which can be used for quickly constructing and reducing construction difficulty and construction cost, and can ensure the safety of a foundation pit.
In order to achieve the purpose, the invention provides the following technical scheme that the main body frame beam support changing structure is characterized by comprising
The maintenance pile is meshed with the piles to form a closed and independent underground space;
the inner support structure comprises a plurality of inner support beams, a crown beam, a waist beam and steel columns, and supports the enclosure structure before the construction of the main frame structure;
the structure comprises a main body frame structure, a plurality of columns and a plurality of beams, wherein the main body frame structure comprises frame columns, frame beams, a structural plate and a basement outer wall;
trade and prop the structure, trade prop the structure set up with the horizontal frame roof beam department that the steel stand interfered trades and props, trade and prop the structure and trade including the bracing and trade the roof beam and the level and prop the roof beam.
Further, with the horizontal frame roof beam that the steel stand is interfered is broken by the steel stand, the bracing trades the bracing beam and keeps away from fender pile one end and connect on the horizontal frame roof beam of former disconnection keeps away from fender pile one end frame post, and the bracing trades the bracing beam and is close to fender pile one side and basement outer wall diagonal, the bracing trades the bracing beam symmetry set up in by the horizontal frame roof beam both sides that the steel stand breaks to set up the same level near fender pile one side and trade the bracing beam and link to each other with the fender pile, the level of tip trades the bracing beam and intersects perpendicularly with the fender pile.
Further, the horizontal support beam that trades include with the middle level of horizontal frame roof beam same axis trades the support beam and uses the middle level trades the support beam and trades the support beam as the both sides level that the symmetry axis set up, middle level trade the support beam with horizontal frame roof beam is aequilate, both sides level trades the support beam cross-section width does half of horizontal frame roof beam width, and the height is all the same.
Furthermore, hoisting holes are reserved on the steel upright columns.
And further, steel bar joints are reserved at two ends of the original disconnected transverse frame beam.
Furthermore, the bottom of the steel upright post is embedded into a structural bottom plate, and a water stop plate is welded on the steel upright post in the structural bottom plate.
The invention also provides a construction method of the main frame beam support changing structure, and the support changing structure comprises the following steps:
s1, structural bottom plate construction: pouring a structural bottom plate in the foundation pit, embedding the bottom of the steel upright column into the structural bottom plate, and welding a water stop plate on the steel upright column in the middle of the structural bottom plate;
s2, dismantling the bottommost inner supporting beam: the structural bottom plate is used as a support replacing structure before the third inner supporting beam is removed, an inner supporting beam supporting frame is erected on the structural bottom plate, and the removing work of the bottommost inner supporting beam is directly carried out;
s3, erecting a main structure support frame: according to the self-weight load of the beam slab of the main structure of the basement, the construction load and the structural form, a main structure support frame is erected, and a column component template and a support frame are erected according to the cross section form of the main structure column;
s4, beam replacement construction: sequentially carrying out support beam replacement construction on other inner support beams, symmetrically arranging inclined support replacement support beams on two sides of a transverse frame beam at a steel stand column, connecting one end, far away from a fender pile, of each inclined support replacement support beam to a frame column at one end, far away from the fender pile, of the original disconnected transverse frame beam, obliquely crossing one side, close to the fender pile, of each inclined support replacement support beam with the outer wall of the basement, symmetrically arranging the inclined support replacement support beams on two sides of the transverse frame beam, interrupted by the steel stand column, arranging the same horizontal support replacement beams on one side, close to the fender pile, of each inclined support replacement support beam to be connected with the fender pile, vertically crossing the fender pile and the horizontal support replacement beams at the end part, maintaining and replacing the support beams and the main structure, and carrying out next construction after the strength of concrete;
step S5: and (3) replacing support beams of other inner support beams: continuing to sequentially carry out the construction of replacing the support of the internal support beam of the foundation pit and the construction of removing the internal support beam from bottom to top according to the steps S1-S4, wherein the construction steps are still to set up a main body support replacing structure support frame and the construction of replacing the support structure, when the strength of the support replacing structure meets the design requirement, removing the internal support beam at the corresponding position, and repeating the steps, and finally completing all the work of removing and replacing the support;
step S6: dismantling the steel upright column: and cutting off the steel upright columns from top to bottom in a segmented manner, lifting the steel upright columns in a segmented manner, pouring the frame beams and the structural plates in the lifting hole area from the bottom layer of the basement layer by layer, and removing the lower support frames at corresponding positions after the concrete strength of the frame beams and the structural plates meets the design requirement to complete all support replacing work.
Further, in the above steps S2, S4 and S5, the inner supporting beam is segmented and cut by a diamond wire saw cutting method, the cutting length is lifted and transported outside according to the lifting load-carrying equipment, and when the inner supporting beam in a certain area is completely removed, the supporting frame of the inner supporting beam in the area can be removed.
Compared with the prior art, the invention at least comprises the following beneficial effects:
1. because the depth of the foundation pit is deep, the distance between the main structure and the maintenance pile is small, and an operator has no operation space and cannot use a prefabricated support replacing component for installation and loading construction, the invention utilizes the main frame beam as the support replacing component, extends the cross section of the main frame beam to the maintenance pile, and smoothly transmits the lateral pressure on the maintenance pile to the main frame structure through the support replacing beam, thereby achieving the purpose of support replacing.
2. When the positions of the steel upright posts conflict with those of the frame beam, the component form of the support replacing beam is symmetrically arranged on the two sides of the frame beam, so that the problem that the horizontal side pressure cannot be transmitted when the frame beam is disconnected is effectively solved, and the support replacing beam can be used as a main structure and a support replacing component to realize multifunctional purposes.
3. Compared with other assembly type support replacing component construction methods, the construction method has the advantages of high construction speed, simple and convenient construction operation, lower construction cost and effectively guaranteed construction quality, thereby ensuring the construction safety of support replacing and dismantling.
4. The frame beam and the support replacing beam are parts of the main body frame, so that the lateral rigidity of the basement main body structure is increased, the lateral rigidity of a foundation pit support replacing system is increased, and the safety reserve of the foundation pit basement is improved.
Drawings
FIG. 1 is a plan view of a beam-column structure and a support-changing structure;
FIG. 2 is an elevation view of a beam-column structure and a detachable support;
fig. 3 is a schematic view of the inner supporting beam support frame set up in the construction step S1;
FIG. 4 is a schematic view of a third inner supporting beam and a supporting frame of the inner supporting beam removed in the construction step 2;
FIG. 5 is a schematic diagram of the erection of the main structure support frame in the construction step 3;
FIG. 6 is a schematic view of the construction step 4;
FIG. 7 is a schematic diagram of the construction sequence of the upper inner supporting beam repeating the first four steps in the construction step 5;
FIG. 8 is a schematic view of steel column removal and frame beam restoration in the construction step 6;
figure 1-fender post; 2-inner supporting beam; 3-a crown beam; 4-waist rail; 5-steel upright posts; 6-frame columns; 7-transverse frame beams; 8-longitudinal frame beams; 9-structural panels; 10-basement exterior wall; 11-bracing and replacing a supporting beam; 12-horizontally replacing the supporting beam in the middle; 13-horizontally replacing the supporting beams at two sides; 14-hoisting holes; 15-steel bar joints; 16-a water stop plate; 17-structural bottom plate, 18-internal supporting beam support frame and 19-main body structure support frame.
Detailed Description
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.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1 to 8, the present application provides a main body frame beam bracing structure, comprising
The building enclosure comprises a plurality of enclosure piles 1, and the maintenance piles are occluded with one another to form a closed and independent underground space;
the inner support structure comprises a plurality of inner support beams 2, a crown beam 3, a waist beam 4 and steel columns 5, and supports the enclosure structure before the construction of a main frame structure;
the structure comprises a main body frame structure, a frame column 6, a frame beam, a structural plate 9 and a basement outer wall 10, wherein the frame beam comprises a transverse frame beam 7 and a longitudinal frame beam 8;
and the support structure is changed, the support structure is arranged at the position of the transverse frame beam 7 interfered by the steel upright post 5, and the support structure comprises an inclined support change support beam 11 and a horizontal support change beam.
In the above embodiment, the main frame structure, the enclosure structure, the inner support structure and the support replacement structure system together complete the construction of the foundation pit and the main structure below the ground. Interior brace roof beam 2 is connected with vertical direction at the horizontal plane with steel stand 5 to brace roof beam 2's span in reducing, satisfy the foundation ditch stable, when the construction in the foundation ditch, overlap when steel stand 5 and frame roof beam position, when the frame roof beam can't transmit foundation ditch lateral pressure as trading the brace roof beam, 7 department bilateral symmetry construction at the horizontal frame roof beam that interferes with steel stand 5 trade the brace roof beam as trading the brace roof beam, satisfy foundation ditch safety and stability requirement, can furthest practice thrift the cost simultaneously.
In further preferred embodiment, the horizontal frame roof beam 7 that is interfered by steel upright 5 is broken by steel upright 5, bracing trades supporting beam 11 and keeps away from fender pile 1 one end and connects on fender pile 1 one end frame post 6 is kept away from to the horizontal frame roof beam 7 of former disconnection, and bracing trades supporting beam 11 and is close to fender pile 1 one side and basement outer wall 10 diagonal, bracing trades supporting beam 11 symmetry set up in by the horizontal frame roof beam 7 both sides that steel upright 5 breaks to set up the same level near fender pile 1 one side and trade supporting beam and link to each other with fender pile 1, the level of tip trades supporting beam and is intersected perpendicularly with fender pile 1.
In the above embodiment, the whole foundation pit inner supporting structure is composed of the plurality of inner supporting beams 2 and the steel columns 5, the vertical steel columns 5 are connected with the plurality of horizontal inner supporting beams 2, part of the steel columns 5 penetrate through the main structure frame beam from bottom to top, the main structure frame beam is broken, construction cannot be performed, lateral pressure of the foundation pit enclosure structure cannot be transmitted to the main structure frame beam, the main structure frame beam cannot be used as a support replacing structure, and support replacing requirements cannot be met. Therefore, through setting up in 5 position frame roof beam bilateral symmetry on the steel column and trading the stay beam, trade including the level and trade stay beam and bracing and trade stay beam 11, the bracing trades stay beam 11 and keeps away from fender pile 1 one end and connects on former disconnection frame roof beam keeps away from 1 one end frame post 6 of fender pile, be close to 1 one side of fender pile and basement outer wall 10 skew, both sides are equal apart from frame post 6, and it trades the stay beam to set up the level and trades the stay beam and link to each other with fender pile 1 to be close to 1 one side bracing of fender pile, the level of tip trades the stay beam and intersects with fender pile 1 is perpendicular, the aforesaid trades the stay beam and is the reinforced concrete component. When the supporting beam component is replaced for construction, the frame beam in the middle of the supporting beam is replaced for construction, the supporting beam is replaced by normal construction close to one end of the fender post 1, the supporting beam and the main structure are maintained, and construction in the next step can be carried out after the concrete strength reaches the design requirement.
In a further preferred embodiment, the horizontal bracing beams include a middle horizontal bracing beam 12 having the same axis as the transverse frame beam 7 and two side horizontal bracing beams 13 arranged with the middle horizontal bracing beam 12 as a symmetry axis, the middle horizontal bracing beam 12 has the same width as the transverse frame beam 7, and the cross-sectional width of the two side horizontal bracing beams 13 is half of the width of the transverse frame beam 7, and the heights are the same.
In the above embodiment, the replacement bracing beams are arranged near the frame beam in equal area, equal inertia moment and equal horizontal force strength, the replacement bracing beams are symmetrically arranged on both sides of the frame beam according to design calculation, the beam height is equal to the frame beam in height, the middle horizontal bracing beam 12 is equal to the width of the transverse frame beam 7, and the cross-section width of the two side horizontal bracing beams 13 is half of the width of the transverse frame beam 7.
In a further preferred embodiment, hoisting holes 14 are reserved on the steel upright 5. And after all the support replacing work is finished, the steel upright post 5 is dismantled and hoisted through the reserved hoisting hole 14.
In a further preferred embodiment, the steel bar joints 15 are reserved at two ends of the original disconnected transverse frame beam 7, and then the disconnected transverse frame beam 7 is poured upwards layer by layer from the bottom layer of the basement.
In a further preferred embodiment, a structural bottom plate 17 is embedded in the bottom of the steel upright 5, and a water stop plate 16 is welded on the steel upright 5 in the structural bottom plate 17 to prevent groundwater from permeating between the steel upright 5 and the structural bottom plate 17.
The embodiment also provides a construction method of the main frame beam support changing structure, which comprises the following steps:
s1, structural bottom plate construction: pouring a structural bottom plate 17 in the foundation pit, burying the bottom of the steel upright post 5 into the structural bottom plate 17, and welding a water stop plate 16 on the steel upright post 5 in the structural bottom plate 17;
s2, dismantling the bottommost inner supporting beam: the structural bottom plate 17 is used as a support replacing structure before the support beam in the bottommost layer is removed, an inner support beam support frame 18 is erected on the structural bottom plate 17, and the removal work of the bottommost inner support beam 2 is directly carried out;
s3, erecting a main structure support frame: according to the self-weight load of the beam slab of the main structure of the basement, the construction load and the structural form, a main structure support frame 19 is erected, and a column component template and a support frame are erected according to the section form of the main structure column;
s4, beam replacement construction: sequentially carrying out support beam replacement construction on other inner support beams 2, symmetrically arranging inclined strut replacement support beams 11 at two sides of a transverse frame beam 7 at a steel upright post 5, connecting one ends of the inclined strut replacement support beams 11, far away from a fender post 1, to a frame post 6 at one end of an original disconnected transverse frame beam 7, far away from the fender post 1, obliquely crossing one side, close to the fender post 1, of the inclined strut replacement support beams 11 with a basement outer wall 10, symmetrically arranging the inclined strut replacement support beams 11 at two sides of the transverse frame beam 7, broken by the steel upright post 5, arranging the same horizontal replacement support beams at one side, close to the fender post 1, of the inclined strut replacement support beams to be connected with the fender post 1, vertically crossing the horizontal replacement support beams at the end part with the fender post 1, maintaining the replacement support beams and the main body structure, and carrying out next construction after the strength of concrete reaches the design requirement;
step S5: and (3) replacing support beams of other inner support beams: continuing to sequentially carry out support changing construction of the inner supporting beam 2 of the foundation pit and dismantling construction of the inner supporting beam 2 from bottom to top according to the steps S1-S4, wherein the construction steps are still to set up a main support changing structure supporting frame and support changing structure construction, when the strength of the support changing structure meets the design requirement, dismantling of the inner supporting beam 2 at the corresponding position is carried out, and the steps are repeated, so that all support dismantling and changing work is finally completed;
step S6: dismantling the steel upright column: and cutting off the steel upright posts 5 from top to bottom in a segmented manner, lifting in a segmented manner, pouring the frame beam and the structural plate 9 in the lifting hole 14 region from the bottom layer of the basement layer by layer, and removing the lower support frame at the corresponding position after the concrete strength of the frame beam and the structural plate 9 reaches the design requirement to complete the whole support replacing work.
In the above embodiment, in the above steps S2, S4 and S5, the inner bracing beam is segmented and cut by the method of diamond wire saw cutting, the cutting length is lifted and transported outside according to the lifting load-carrying equipment, and when the bracing beam 2 in a certain area is completely removed, the bracing beam support frame 18 in the area can be removed.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (8)
1. A main body frame beam support changing structure is characterized by comprising
The maintenance pile is meshed with the piles to form a closed and independent underground space;
the inner support structure comprises a plurality of inner support beams, a crown beam, a waist beam and steel columns, and supports the enclosure structure before the construction of the main frame structure;
the structure comprises a main body frame structure, a plurality of columns and a plurality of beams, wherein the main body frame structure comprises frame columns, frame beams, a structural plate and a basement outer wall;
trade and prop the structure, trade prop the structure set up with the horizontal frame roof beam department that the steel stand interfered trades and props, trade and prop the structure and trade including the bracing and trade the roof beam and the level and prop the roof beam.
2. The main body frame beam bracing structure according to claim 1, wherein: with the horizontal frame roof beam that the steel stand is interfered is broken by the steel stand, the bracing trades to prop the roof beam and keeps away from fender pile one end and connect on the horizontal frame roof beam of former disconnection keeps away from fender pile one end frame post, and the bracing trades to prop the roof beam and is close to fender pile one side and basement outer wall bevel, the bracing trades prop the roof beam symmetry set up in by the horizontal frame roof beam both sides that the steel stand breaks to set up the same level near fender pile one side and trade and prop the roof beam and link to each other with fender pile, the level of tip trades and props the roof beam and is intersected perpendicularly with fender pile.
3. The main body frame beam bracing structure according to claim 2, wherein: the horizontal supporting beam comprises a middle horizontal supporting beam and two side horizontal supporting beams, wherein the middle horizontal supporting beam is arranged on the same axis of the transverse frame beam, the two side horizontal supporting beams are arranged as symmetrical axes, the middle horizontal supporting beam and the transverse frame beam are equal in width, and the cross section width of the two side horizontal supporting beams is half of the width of the transverse frame beam and the height is the same.
4. The main body frame beam bracing structure according to claim 1, wherein: and hoisting holes are reserved on the steel upright columns.
5. The main body frame beam bracing structure according to claim 1, wherein: and steel bar joints are reserved at two ends of the original disconnected transverse frame beam.
6. The main body frame beam bracing structure according to claim 1, wherein: and the bottom of the steel upright is embedded into a structural bottom plate, and a water stop plate is welded on the steel upright in the middle of the structural bottom plate.
7. The construction method of a body frame beam bracing structure according to claims 1-6, comprising the steps of:
s1, structural bottom plate construction: pouring a structural bottom plate in the foundation pit, embedding the bottom of the steel upright column into the structural bottom plate, and welding a water stop plate on the steel upright column in the middle of the structural bottom plate;
s2, dismantling the bottommost inner supporting beam: the structural bottom plate is used as a support replacing structure before the third inner supporting beam is removed, an inner supporting beam supporting frame is erected on the structural bottom plate, and the removing work of the bottommost inner supporting beam is directly carried out;
s3, erecting a main structure support frame: according to the self-weight load of the beam slab of the main structure of the basement, the construction load and the structural form, a main structure support frame is erected, and a column component template and a support frame are erected according to the cross section form of the main structure column;
s4, beam replacement construction: sequentially carrying out support beam replacement construction on other inner support beams, symmetrically arranging inclined support replacement support beams on two sides of a transverse frame beam at a steel stand column, connecting one end, far away from a fender pile, of each inclined support replacement support beam to a frame column at one end, far away from the fender pile, of the original disconnected transverse frame beam, obliquely crossing one side, close to the fender pile, of each inclined support replacement support beam with the outer wall of the basement, symmetrically arranging the inclined support replacement support beams on two sides of the transverse frame beam, interrupted by the steel stand column, arranging the same horizontal support replacement beams on one side, close to the fender pile, of each inclined support replacement support beam to be connected with the fender pile, vertically crossing the fender pile and the horizontal support replacement beams at the end part, maintaining and replacing the support beams and the main structure, and carrying out next construction after the strength of concrete;
step S5: and (3) replacing support beams of other inner support beams: continuing to sequentially carry out the construction of replacing the support of the internal support beam of the foundation pit and the construction of removing the internal support beam from bottom to top according to the steps S1-S4, wherein the construction steps are still to set up a main body support replacing structure support frame and the construction of replacing the support structure, when the strength of the support replacing structure meets the design requirement, removing the internal support beam at the corresponding position, and repeating the steps, and finally completing all the work of removing and replacing the support;
step S6: and cutting off the steel upright from top to bottom in sections, lifting in sections, pouring the frame beam and the structural slab in the lifting hole area from the bottom layer of the basement layer by layer, and removing the lower support frame at the corresponding position after the concrete strength of the frame beam and the structural slab meets the design requirement to complete the whole support replacing work.
8. The main body frame beam support replacing construction method according to claim 7, characterized in that: in the steps S2, S4 and S5, the inner supporting beam is cut in sections by a diamond wire saw cutting method, the inner supporting beam is lifted and transported outwards according to the cutting length of the inner supporting beam by lifting load-carrying equipment, and when the inner supporting beam in a certain area is completely removed, the supporting frame of the inner supporting beam in the area can be removed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113463653A (en) * | 2021-06-30 | 2021-10-01 | 中建一局集团第五建筑有限公司 | Construction method for dismantling inner support in vertical sectional manner |
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