CN112030995A - Construction method for quickly taking out of ground for supporting and disassembling in advance for main building of super high-rise building - Google Patents
Construction method for quickly taking out of ground for supporting and disassembling in advance for main building of super high-rise building Download PDFInfo
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- CN112030995A CN112030995A CN202010921712.2A CN202010921712A CN112030995A CN 112030995 A CN112030995 A CN 112030995A CN 202010921712 A CN202010921712 A CN 202010921712A CN 112030995 A CN112030995 A CN 112030995A
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- main building
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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
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
Abstract
The invention discloses a construction method for quickly taking out a super high-rise main building from the ground in advance to support and dismantle the building, which comprises the following steps of S1: rechecking the conflict situation of the vertical structure of the main building and the support beam plate in the foundation pit; s2: rechecking the elevation conflict condition of the horizontal structure of the main building and the support beam plate in the foundation pit; s3: after the vertical and horizontal structures of the main building are out of the ground, the upper structure of the main building and the inner support structure of the foundation pit are constructed simultaneously; s4: and after the stifled dismantling construction of the inner support structure of the foundation pit is finished, dismantling the temporary horizontal pull-out structure, and constructing the horizontal structure of the residual main building thrown below the ground. The construction method adopts the vertical structure position conversion and horizontal structure back swinging construction scheme, solves the problem of conflict between the foundation pit inner support and the main building beam and column, ensures the stability of the vertical advanced structure through the temporary horizontal drawknot structure, has high safety, simultaneously constructs the foundation pit inner support structure removal and the main building superstructure, does not occupy key processes and key routes of structure construction, is more convenient for field construction, and effectively ensures the construction period.
Description
Technical Field
The invention relates to the technical field of construction of deep foundation pits of constructional engineering, in particular to a construction method for quickly taking out a super high-rise main building from the ground to support and disassemble the super high-rise main building.
Background
When the traditional internal support is dismantled by adopting a sequential dismantling construction process, a fertilizer groove exists between a basement outer wall and an occlusive pile, a supporting beam and a force transmission belt need to be constructed before a plate is dismantled, meanwhile, the fertilizer groove between the basement outer wall and the supporting pile needs to be symmetrically backfilled with cohesionless soil materials such as coarse sand or stone powder, the internal support can be carried out for dismantling until the strength of the constructed basement structure concrete below the support to be dismantled at least reaches 80% of the design strength to form a support replacing structure, the preposed process is longer than the dismantling construction period, the key route of structure construction needs to be occupied in the dismantling process, and the influence on the construction progress of a main structure is larger.
Disclosure of Invention
The invention aims to provide a construction method for quickly taking out a super high-rise main building from the ground to support and disassemble the super high-rise main building in advance, so as to solve the technical problems in the background technology.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a construction method for quickly taking out a super high-rise main building from the ground for supporting and disassembling in a sealed manner comprises the following steps,
s1: rechecking the conflict situation of the vertical structure of the main building and the beam plate supported in the foundation pit, if the vertical structure of the main building conflicts with the secondary beam plate supported in the foundation pit, dismantling the secondary beam plate supported at the conflict part, and if the vertical structure of the main building conflicts with the main beam plate supported in the foundation pit, adjusting the position of the vertical structure of the main building and carrying out conversion at the first floor, so as to ensure that the vertical structure of the main building can be constructed to the ground in advance;
s2: rechecking the elevation conflict condition of the horizontal structure of the main building and the beam slab supported in the foundation pit, if the horizontal structure of the main building does not conflict with the beam slab supported in the foundation pit, erecting a template support frame of the horizontal structure of the main building on the beam slab supported in the foundation pit, if the horizontal structure of the main building locally conflicts with the beam slab supported in the foundation pit, dismantling the secondary beam slab supported in the foundation pit at the conflict part, if the horizontal structure of the main building greatly conflicts with the beam slab supported in the foundation pit, swinging the horizontal structure of the main building at the layer, and arranging a temporary horizontal tie structure between the vertical structures of the main building to ensure the stability of the vertical advanced structure;
s3: after the vertical structure and the horizontal structure of the main building go out of the ground, the upper structure of the main building and the inner support structure of the foundation pit are constructed simultaneously;
s4: and after the stifled dismantling construction of the inner support structure of the foundation pit is finished, dismantling the temporary horizontal pull-out structure, and constructing the horizontal structure of the residual main building thrown below the ground.
Preferably, in step S3, the construction of tightly dismantling the foundation pit support structure is performed in the order from the upper layer to the lower layer, the support beam bodies are performed in the order of removing the sealing plate at the support beam position first, removing the secondary beam later, removing the main beam again, and removing the upright post last, the support rod members in the beam bodies are performed in the order of cutting the rod members with small stress first and then cutting the rod members with large stress, the support beam bodies of the same type are removed at intervals, and the uniformity of stress release in the dismantling process is ensured.
Preferably, when the supporting beam is dismantled in each span, the connecting node of the supporting beam and the waist beam needs to be cut firstly, the steel pipe columns are prevented from bearing the action of a unidirectional force, and the supporting beams are symmetrically dismantled from the span to the support among the upright columns.
Preferably, in the step S3, different removing methods are selected according to the position relationship between the beam supported in the foundation pit and the main building structure in the construction of stuffy demolition of the foundation pit support structure, the support beam with the lower net height is cut by a steel stirrup and a wire saw, the support beam with the higher net height is removed by an artificial pneumatic pick, and the concrete block located in the corner is mechanically removed.
Preferably, in the step S3, the supporting beam cut pieces and the broken slag detached in the construction of the inner supporting structure of the foundation pit are horizontally transported on the structural floor slab by using a forklift, the supporting beam cut pieces are vertically transported by using the cooperation of an automobile crane and a tower crane, and are shipped out from a hoisting entrance, and the broken supporting beam broken pieces manually and mechanically are shipped out from the site through an automobile ramp.
Preferably, the bearing capacity of the structural floor slab is checked and calculated again before horizontal transportation is carried out by adopting a forklift, a region with unsatisfactory bearing capacity is supported by adopting a scaffold for vertical back jacking, the automobile ramp is located in a floor region and has no horizontal structure, and in order to ensure horizontal force transmission, a horizontal back jacking steel support is arranged in the floor region of the automobile ramp.
Preferably, waste rubber tires are laid on the structural floor slab on the horizontal transportation route of the forklift, and the steel plate is laid on the post-cast strip of the structural floor slab, so that the structural floor slab is prevented from cracking.
Preferably, in order to improve the overall stability of the structure, the vertical structure of the main building adopts a core tube structure, and the temporary horizontal tie structure in the step S2 correspondingly adopts a steel frame structure.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the support structure in the foundation pit is dismantled and the upper structure of the main building is constructed simultaneously, so that key processes and key lines of structure construction are not occupied, and the influence of the support dismantling in the foundation pit on the construction progress of the main structure is greatly reduced;
2. the invention adopts the vertical structure position conversion and horizontal structure back swinging construction scheme, solves the conflict problem of the inner support of the foundation pit and the main building beam and column, ensures the stability of the vertical advanced structure through the temporary horizontal drawknot structure, has high safety, is more convenient for field construction, and effectively ensures the construction period.
Drawings
The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative, not limiting of the invention, and in which:
FIG. 1 is a schematic structural diagram of a main building vertical structure and a foundation pit inner support in conflict in a construction method for quickly taking out a super high-rise main building from the ground in advance and carrying out support and disassembly;
FIG. 2 is a detailed node structure schematic diagram of a main building vertical structure in advance when the main building vertical structure conflicts with a foundation pit inner support in the construction method for quickly taking out of the ground for supporting and disassembling the super high-rise main building in advance according to the invention;
FIG. 3 is a schematic structural diagram of a main building horizontal structure and a foundation pit inner support in conflict in the construction method for quickly taking out a super high-rise main building from the ground in advance for support and tight dismantling;
FIG. 4 is a schematic structural diagram of a temporary horizontal tie structure in a construction method for quickly taking out of the ground for supporting and disassembling in advance for a main building with a super-high-rise building according to the invention;
fig. 5 is a schematic structural diagram of a post-cast strip of a horizontal structure of a main building when the support in the foundation pit is subjected to tight dismantling in the construction method that the super high-rise main building is quickly taken out of the ground in advance for tight dismantling.
Reference numerals: the method comprises the following steps of 1-main building vertical structure, 2-main building horizontal structure, 3-foundation pit inner support, 4-temporary horizontal tie structure, 5-scaffold and 6-steel plate.
Detailed Description
Hereinafter, an embodiment of a construction method for quickly taking out of the ground to support and demolish a super high-rise main building according to the present invention will be described with reference to the accompanying drawings. The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention. Preferred embodiments of the present invention are described in further detail below with reference to FIGS. 1-5:
as shown in fig. 1-5, the preferred construction method for quickly taking out the super high-rise main building from the ground for supporting and dismantling in advance comprises the following steps,
s1: as shown in fig. 1-2, the conflict situation of the main building vertical structure 1 and the beam plate of the support 3 in the foundation pit is rechecked, if the main building vertical structure 1 conflicts with the secondary beam plate of the support 3 in the foundation pit, the secondary beam plate of the support 3 in the foundation pit at the conflict position is removed, and if the main building vertical structure 1 conflicts with the main beam plate of the support 3 in the foundation pit, the position of the main building vertical structure 1 is adjusted and converted at the first floor, so that the main building vertical structure 1 can be constructed to the ground in advance;
s2: as shown in fig. 3-4, the elevation conflict situation of the beam slab of the main building horizontal structure 2 and the foundation pit inner support 3 is rechecked, if the main building horizontal structure 2 does not conflict with the beam slab of the foundation pit inner support 3, a template support frame of the main building horizontal structure 2 is erected on the beam slab of the foundation pit inner support 3, if the main building horizontal structure 2 locally conflicts with the beam slab of the foundation pit inner support 3, the secondary beam slab of the foundation pit inner support 3 at the conflict part is removed, if the main building horizontal structure 2 greatly conflicts with the beam slab of the foundation pit inner support 3, the main building horizontal structure 2 of the layer is thrown, a temporary horizontal tying structure 4 is arranged between the main building vertical structures 1, in order to improve the overall stability of the structure, the main building vertical structure 1 adopts a core tube structure, and a corresponding temporary steel frame is arranged according to the vertical height of a previous core tube for horizontal tying, so as to ensure the stability of the vertical previous;
s3: after the main building vertical structure 1 and the main building horizontal structure 2 are taken out of the ground, the main building upper structure and the foundation pit inner support 3 structure are constructed simultaneously, the foundation pit inner support 3 structure is constructed in an oppressive mode from the upper layer to the lower layer, a support beam body is constructed in the sequence of firstly removing a seal plate at a support beam, then removing a secondary beam, then removing a main beam and finally removing an upright post, a support rod piece in the beam body is cut in the sequence of firstly cutting a rod piece with small stress and then cutting a rod piece with large stress, the support beam body of the same type is removed at intervals, the uniformity of stress release in the support removing process is ensured, a connecting node of the support beam and a waist beam is required to be cut firstly when each span of the support beam is removed, the effect that the steel tube column bears the unidirectional force is avoided, and the support beam; in the construction of the stuffy demolition of the structure of the inner support 3 of the foundation pit, different demolition modes are selected according to the position relation of the beam of the inner support 3 of the foundation pit and a main building structure, a support beam with lower net height is cut by a steel stirrup and a rope saw, a support beam with higher net height is demolished by an artificial pneumatic pick, a concrete block positioned in a corner is demolished mechanically, a disassembled support beam cut block and a broken slag are transported horizontally on a structural floor slab by a forklift, the support beam cut block is vertically transported by matching of an automobile crane and a tower crane, the broken slag of the support beam is transported out of a site from a hoisting entrance, the broken slag of the support beam which is manually and mechanically demolished is transported out of the site by an automobile ramp, as shown in figure 5, the bearing capacity of the structural floor slab needs to be checked and calculated again before the horizontal transportation by the forklift, an area with insufficient bearing capacity is supported by a scaffold 5 in a, arranging a horizontal back-jacking steel support in a floor area of the automobile ramp, laying waste rubber tires on a structural floor slab at a horizontal transportation route of the forklift, and laying a steel plate 6 at a post-cast strip of the structural floor slab to prevent the structural floor slab from cracking;
s4: and after the construction of the inner support 3 structure in the foundation pit is completed, the temporary horizontal pull-out structure 4 is removed, and the construction of the residual main building horizontal structure 2 thrown below the ground is carried out.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A construction method for quickly taking out of the ground to support and stifle dismantling of a super high-rise main building in advance is characterized by comprising the following steps,
s1: rechecking the conflict situation of the vertical structure (1) of the main building and the beam plate of the foundation pit inner support (3), if the vertical structure (1) of the main building conflicts with the secondary beam plate of the foundation pit inner support (3), dismantling the secondary beam plate of the foundation pit inner support (3) at the conflict position, and if the vertical structure (1) of the main building conflicts with the main beam plate of the foundation pit inner support (3), adjusting the position of the vertical structure (1) of the main building and carrying out conversion at the first floor;
s2: rechecking the elevation conflict situation of the beam slab of the main building horizontal structure (2) and the foundation pit support (3), if the main building horizontal structure (2) does not conflict with the beam slab of the foundation pit support (3), erecting a template support frame of the main building horizontal structure (2) on the beam slab of the foundation pit support (3), if the main building horizontal structure (2) locally conflicts with the beam slab of the foundation pit support (3), dismantling a secondary beam slab of the foundation pit support (3) at the conflict part, if the main building horizontal structure (2) greatly conflicts with the beam slab of the foundation pit support (3), swinging the layer of the main building horizontal structure (2) backwards, and arranging a temporary horizontal tie structure (4) between the main building vertical structures (1);
s3: after the vertical structure (1) and the horizontal structure (2) of the main building are out of the ground, the upper structure of the main building and the inner support (3) of the foundation pit are constructed simultaneously;
s4: and after the construction of the inner support (3) structure in the foundation pit is completed, the temporary horizontal pull-out structure (4) is removed, and the construction of the residual main building horizontal structure (2) thrown below the ground is carried out.
2. The construction method for quickly taking out of the ground and supporting and disassembling the super high-rise main building in advance according to claim 1, is characterized in that: in the step S3, the construction of the inner support (3) of the foundation pit is performed according to the sequence from the upper layer to the lower layer, the support beam bodies are performed according to the sequence of firstly removing the sealing plates at the support beam positions, secondly removing the beams, secondly removing the main beams and finally removing the upright columns, the support rod pieces in the beam bodies are performed according to the sequence of firstly cutting the rod pieces with small stress and then cutting the rod pieces with large stress, and the support beam bodies of the same type are performed according to the principle of interval removal.
3. The construction method for quickly taking out of the ground and supporting and disassembling the super high-rise main building in advance according to claim 2 is characterized in that: when each span of the supporting beam is dismantled, a connecting joint of the supporting beam and the waist beam is cut firstly, and the supporting beams are symmetrically dismantled between the upright columns from the midspan to the support.
4. The construction method for quickly taking out of the ground and supporting and disassembling the super high-rise main building in advance according to claim 1, is characterized in that: and S3, in the construction of stifled demolition of the foundation pit inner support (3) structure, different demolition modes are selected according to the position relation between the beam of the foundation pit inner support (3) and the main building structure, the supporting beam with lower net height is cut by a steel stirrup and a wire saw, the supporting beam with higher net height is demolished by an artificial pneumatic pick, and the concrete block in the corner is demolished by machinery.
5. The construction method for quickly taking out of the ground and supporting and disassembling the super high-rise main building in advance according to claim 1, is characterized in that: and S3, horizontally transporting support beam blocks and crushed slag detached in the structure disintegration construction of the foundation pit inner support (3) on a structural floor slab by using a forklift, vertically transporting the support beam blocks by using the cooperation of an automobile crane and a tower crane, and shipping and leaving from a hoisting entrance, and transporting the support beam crushed slag out of the site through an automobile ramp.
6. The construction method for quickly taking out of the ground and supporting and disassembling the super high-rise main building in advance according to claim 5, wherein the construction method comprises the following steps: the bearing capacity of the structural floor slab needs to be rechecked and checked before horizontal transportation is carried out by adopting a forklift, a scaffold (5) is adopted for carrying out vertical back-jacking support in an area with unsatisfactory bearing capacity, and the automobile ramp is located in a floor area and is provided with a horizontal back-jacking steel support.
7. The construction method for quickly taking out of the ground and supporting and disassembling the super high-rise main building in advance according to claim 5, wherein the construction method comprises the following steps: waste rubber tires are laid on a structural floor slab on the horizontal transportation route of the forklift, and a steel plate (6) is laid on a post-cast strip of the structural floor slab.
8. The construction method for quickly taking out of the ground and supporting and disassembling the super high-rise main building in advance according to claim 1, is characterized in that: the main building vertical structure (1) adopts a core tube structure, and the temporary horizontal tie structure (4) in the step S2 correspondingly adopts a steel frame structure.
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| CN113482052A (en) * | 2021-06-25 | 2021-10-08 | 上海建工七建集团有限公司 | Construction method of tower at stage of super high-rise basement |
| CN114411757A (en) * | 2022-02-08 | 2022-04-29 | 中建八局南方建设有限公司 | Early-dismantling construction method for inner support partition of deep foundation pit |
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