CN216142086U - Structure improvement and reinforced structure of construction ground wall in existing underground building - Google Patents
Structure improvement and reinforced structure of construction ground wall in existing underground building Download PDFInfo
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- CN216142086U CN216142086U CN202121762160.1U CN202121762160U CN216142086U CN 216142086 U CN216142086 U CN 216142086U CN 202121762160 U CN202121762160 U CN 202121762160U CN 216142086 U CN216142086 U CN 216142086U
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Abstract
A structure reconstruction and reinforcement structure for constructing an underground diaphragm wall in an existing underground building is characterized in that in an overlapping area of a deep foundation pit and a peripheral building, a partition wall is newly constructed in the building, the partition wall is also used as an underground diaphragm wall guide wall, and a rib wall is constructed by clinging to the back of the partition wall to reconstruct the existing structure; grouting reinforcement is carried out on the diaphragm wall within a certain grooving depth range from a building bottom plate, full red scaffold reinforcement is carried out on each floor slab in the building, temporary steel supports are newly arranged in partition walls on two sides for supporting, and the existing structure is reinforced; cutting the floor slab of the structure in the grooving range of the diaphragm wall layer by layer and backfilling the space between the two newly-made partition walls to create conditions for the framing construction of the diaphragm wall; the deformation and settlement of the existing building are controlled by monitoring the deformation of the existing building. The utility model has mature process and simple and convenient operation, and has very important reference value and practical significance for the construction of the existing underground buildings on the same type of deep foundation pit underground diaphragm wall crossing periphery.
Description
Technical Field
The utility model relates to the technical field of construction buildings, in particular to a structure transformation and reinforcement structure for constructing a diaphragm wall in an existing underground building.
Background
With the development of underground space engineering, the situation of overlapping and conflict with the existing underground structure can be avoided, for example, when a subway station is newly built, the station position is limited by the influence of circuits, functions, peripheral control pipelines and building structures, so that the adjustment of the planned station position can not be carried out, and the planned station position is overlapped with the position of the existing building at the periphery. Therefore, the development of underground space in the overlapped region of underground space, especially in the busy region of city, is undoubtedly a great technical problem to be solved urgently. At present, an existing underground space structure overlapped with the existing underground space structure is reformed, then building enclosing structures and deep foundation pit construction are carried out in the underground space range, and finally a co-construction space is formed, and currently, related experience of such construction can not be used for reference at home.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a structure transformation and reinforcement structure for constructing an underground diaphragm wall in an existing underground building, wherein a partition wall is newly constructed in the building and is also used as an underground diaphragm wall guide wall, a rib wall is constructed closely to the back of the partition wall, grouting reinforcement is carried out on the underground diaphragm wall within a certain grooving depth range from a building bottom plate, full red scaffold reinforcement is carried out on each floor slab in the building, section steel supports are newly constructed in the partition walls on two sides for supporting, the floor slab of the underground diaphragm wall grooving range structure is cut layer by layer, and the space between the two newly constructed partition walls is backfilled, so that conditions are created for framing construction of the underground diaphragm wall; deformation settlement influence which may be generated by the existing building is controlled by monitoring deformation of the existing building.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a structure transformation and reinforcement structure for constructing a ground connection wall in an existing underground building comprises a first existing structure negative layer (7-1), a second existing structure negative layer B (7-2), a first existing structure negative two layer (8-1), a second existing structure negative two layer (8-2), a first existing structure negative three layer (9-1), a second existing structure negative three layer (9-2), an existing structure top plate (10), an existing structure negative one layer floor (11), an existing structure negative two layer floor (12) and an existing structure bottom plate (13), and is characterized in that the first existing structure negative one layer (7-1), the second existing structure negative two layer (8-2), the first existing structure negative three layer (9-1) and the second existing structure negative one layer B (7-2) penetrate through the interior of the building, The first existing structure negative two-layer (8-1) and the second existing structure negative three-layer (9-2) are provided with two reinforced concrete partition walls (2) from an existing structure bottom plate (13) to an existing structure top plate (10) along the underground diaphragm wall (1); i-shaped rib walls (3) are arranged in spaces of a first existing structure negative layer (7-1), a second existing structure negative layer B (7-2), a first existing structure negative second layer (8-1) and a second existing structure negative second layer (8-2) on the outer sides of the two reinforced concrete partition walls (2), and II-shaped rib walls (4) are arranged in spaces of a first existing structure negative third layer (9-1) and a second existing structure negative third layer (9-2); the two reinforced concrete partition walls (2) are horizontally and transversely supported and reinforced through section steel supports (5); the stratum under the existing structural bottom plate (13) and the underground diaphragm wall (1) is reinforced (6) by grouting.
The reinforced concrete partition wall is characterized in that the section steel supports (5) are adopted to horizontally and transversely support and reinforce the two reinforced concrete partition walls (2) through reserved door openings of the underground diaphragm wall (1), and each layer of the two section steel supports (5) are adopted.
The first existing structure minus one layer (7-1), the first existing structure minus two layers (8-1) and the first existing structure minus three layers (9-1) are reinforced by heavy equipment and floor slabs on each layer of the construction area side of the ground connection wall (1) through full red scaffolds.
Compared with the prior art, the utility model has the following advantages:
the utility model provides a structure reconstruction and reinforcement structure for constructing a diaphragm wall in an existing underground building, which reconstructs a building structure by additionally manufacturing a partition wall and a diaphragm wall guide wall in the building; applying a rib wall closely attached to the back of the partition wall to maintain the stability of the partition wall in the diaphragm wall construction stage; grouting reinforcement is carried out on the diaphragm wall within a certain grooving depth range from the bottom plate of the building so as to ensure the stability of underground water and foundation soil during the cutting of the bottom plate and the construction of the diaphragm wall; carrying out full-space red scaffold reinforcement on each floor in a building so as to cope with the influence of load increased by heavy equipment and construction area construction on an original structure; temporary steel supports are arranged in the newly made partition walls on the two sides for supporting so as to control structural displacement deformation possibly generated after the floor slab is cut; cutting the floor slab of the structure in the grooving range of the diaphragm wall layer by layer and backfilling the space between the two newly-made partition walls to create conditions for the framing construction of the diaphragm wall; deformation settlement influence which may be generated by the existing building is controlled by monitoring deformation of the existing building.
Drawings
FIG. 1 is a schematic sectional view of the construction method of the present invention.
FIG. 2 is a schematic plan view of the construction method of the present invention.
Wherein, in the figure: firstly, connecting the ground with the wall; partition wall; III, forming a rib wall I; fourthly, II type rib walls; supporting temporary section steel; sixthly, grouting reinforcement; seventhly-1-a first existing structure negative layer; seventhly-2-a second existing structure negative layer; eighty-1-a first existing structure negative two layers; eighthly-2-a second existing structure negative two layers (a non-full red scaffold erecting area); ninthly-1-a first existing structure negative three layers; ninthly-2-a second existing structure negative three layers; r-existing structural roof; the existing structure bears a floor; water pumping-two-layer floor with negative structure; selection-existing structural backplane; initial feedback-new foundation pit range.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in figures 1 and 2, the structure transformation and reinforcement structure for constructing the underground diaphragm wall in the existing underground building comprises a first existing structure negative layer (7-1), a second existing structure negative layer B (7-2), a first existing structure negative two layer (8-1), a second existing structure negative two layer (8-2), a first existing structure negative three layer (9-1), a second existing structure negative three layer (9-2), an existing structure top plate (10), an existing structure negative one layer floor (11), an existing structure negative two layer floor (12) and an existing structure bottom plate (13), and is characterized in that the first existing structure negative one layer (7-1), the second existing structure negative two layer (8-2), the first existing structure negative three layer (9-1) and the second existing structure negative one layer B (7-2) penetrate through the interior of the building, The first existing structure negative two-layer (8-1) and the second existing structure negative three-layer (9-2) are provided with two reinforced concrete partition walls (2) from an existing structure bottom plate (13) to an existing structure top plate (10) along the underground diaphragm wall (1); i-shaped rib walls (3) are arranged in spaces of a first existing structure negative layer (7-1), a second existing structure negative layer B (7-2), a first existing structure negative second layer (8-1) and a second existing structure negative second layer (8-2) on the outer sides of the two reinforced concrete partition walls (2), and II-shaped rib walls (4) are arranged in spaces of a first existing structure negative third layer (9-1) and a second existing structure negative third layer (9-2); the two reinforced concrete partition walls (2) are horizontally and transversely supported and reinforced through section steel supports (5); the stratum under the existing structural bottom plate (13) and the underground diaphragm wall (1) is reinforced (6) by grouting.
The reinforced concrete partition wall is characterized in that the section steel supports (5) are adopted to horizontally and transversely support and reinforce the two reinforced concrete partition walls (2) through reserved door openings of the underground diaphragm wall (1), and each layer of the two section steel supports (5) are adopted.
The first existing structure minus one layer (7-1), the first existing structure minus two layers (8-1) and the first existing structure minus three layers (9-1) are reinforced by heavy equipment and floor slabs on each layer of the construction area side of the ground connection wall (1) through full red scaffolds.
The utility model provides a construct transformation and reinforced structure of constructing ground wall in existing underground construction which characterized in that includes following steps:
1) the reinforced concrete partition wall (2) is constructed layer by layer from bottom to top by placing 10cm outside a design contour line of a ground connection wall (1) from a first existing structure minus layer (7-1), a second existing structure minus layer B (7-2), a first existing structure minus two layer (8-1), a second existing structure minus two layer (8-2), a first existing structure minus three layer (9-1) and a second existing structure minus three layer (9-2) in a building overlapped with a foundation pit, the reinforced concrete partition wall (2) is effectively connected with each floor slab of the existing structure, each layer of the reinforced concrete partition wall (2) is also effectively connected vertically, preparation is made for cutting corresponding structure stress conversion of the floor slab in the construction range of the ground connection wall, and meanwhile, the reinforced concrete partition wall (2) also has the function of a guide wall;
2) after construction of each layer of reinforced concrete partition wall (2) is completed, constructing I-shaped ribbed walls (3) and II-shaped ribbed walls (4) of reinforced concrete by clinging to the back of the partition wall, wherein the I-shaped ribbed walls (3) and the II-shaped ribbed walls (4) are effectively connected with the existing structural top plate (10), the existing structural negative one-layer floor plate (11), the existing structural negative two-layer floor plate (12), the existing structural bottom plate (13) and the reinforced concrete partition wall (2), and the I-shaped ribbed walls (3) and the II-shaped ribbed walls (4) of each layer are also effectively connected in the vertical direction so as to maintain the stability of the reinforced concrete partition wall (2) in the construction stage of the diaphragm wall;
3) pre-grouting and reinforcing the underground diaphragm wall (1) and the stratum below the existing structural bottom plate (13) within a certain plane and depth range by a forward or backward grouting process from a door opening reserved in the existing structural bottom plate (13) and the reinforced concrete partition wall (2) so as to ensure the stability of underground water and foundation soil during the cutting of the bottom plate and the construction of the underground diaphragm wall;
4) one floor (7-1) is arranged below a first existing structure in the building, two floors (8-1) are arranged below the first existing structure, three floors (9-1) are arranged below the first existing structure, the top of the full red scaffold is supported and reinforced by the ground wall (1) through heavy equipment and floors on each floor on the side of a construction area layer by layer from bottom to top, and the arrangement positions of vertical rods of the supports are kept as same as those of the upper floor and the lower floor as possible so as to deal with the influence of increased load of construction on the original structure;
5) reserving a door opening from each layer of reinforced concrete partition wall (2) to enter the partition wall, setting up a simple bracket and also serving as a temporary support for floor slab cutting, and horizontally and transversely supporting the reinforced concrete partition wall (2) by using a profile steel support (5) so as to control structural displacement deformation possibly generated after the floor slab cutting;
6) reserving a door opening from each layer of reinforced concrete partition wall (2), entering a middle area between the reinforced concrete partition walls (2) at two sides, cutting a floor slab in the wall body range of the diaphragm wall (1), laying structural deformation monitoring points at the reserved structural range and the reinforced concrete partition wall (2) before cutting, cutting the middle floor slab, then cutting a top plate and a bottom plate, cutting the middle floor slab and the top plate by adopting a wire saw, drilling and coring the bottom plate by adopting a water drill, and strengthening the monitoring on structural deformation in the cutting process;
7) a door opening is reserved in the reinforced concrete partition wall (2), the middle area of the reinforced concrete partition walls (2) on two sides is backfilled by adopting mortar or low-grade concrete according to the engineering scale, or a mode of stirring the cement after the soil is backfilled can be adopted, but the stability of the side wall of the time slot section during the framing construction of the diaphragm wall is ensured;
8) after the strength of the backfilling medium meets the grooving construction requirement of the diaphragm wall, the diaphragm wall construction is developed according to the groove section division and the normal grooving process;
the pre-grouting reinforcement is carried out on the ground connecting wall (1) and the bottom plate of the building under the selected side by adopting a forward or backward grouting process, the reinforcement radius d3 is not less than 3d1 (the thickness of the ground connecting wall), the reinforcement depth h1 is not less than 5d1 (the thickness of the ground connecting wall), the grouting slurry is double-slurry, the bottom plate is perforated by adopting water drilling to guide holes, the hole distribution interval is considered according to 0.8-1.2 m, the number of the primary perforated holes is controlled according to the hole opening condition, and observation and monitoring are enhanced in the grouting reinforcement process.
The reinforced concrete partition wall (2) is horizontally and transversely supported by the section steel supports (5), 22I-shaped steel is adopted for the section steel supports, and the vertical positions are corresponding positions which are 500mm above and below the corresponding elevation of the intermediate floor slab and 500mm away from the bottom of the top plate and the top of the bottom plate; the horizontal spacing of each temporary support is 2000 mm.
Claims (4)
1. A structure transformation and reinforcement structure for constructing a ground connection wall in an existing underground building comprises a first existing structure negative layer (7-1), a second existing structure negative layer B (7-2), a first existing structure negative two layer (8-1), a second existing structure negative two layer (8-2), a first existing structure negative three layer (9-1), a second existing structure negative three layer (9-2), an existing structure top plate (10), an existing structure negative one layer floor (11), an existing structure negative two layer floor (12) and an existing structure bottom plate (13), and is characterized in that the first existing structure negative one layer (7-1), the second existing structure negative two layer (8-2), the first existing structure negative three layer (9-1) and the second existing structure negative one layer B (7-2) penetrate through the interior of the building, The first existing structure negative two-layer (8-1) and the second existing structure negative three-layer (9-2) are provided with two reinforced concrete partition walls (2) from an existing structure bottom plate (13) to an existing structure top plate (10) along the underground diaphragm wall (1); i-shaped rib walls (3) are arranged in spaces of a first existing structure negative layer (7-1), a second existing structure negative layer B (7-2), a first existing structure negative second layer (8-1) and a second existing structure negative second layer (8-2) on the outer sides of the two reinforced concrete partition walls (2), and II-shaped rib walls (4) are arranged in spaces of a first existing structure negative third layer (9-1) and a second existing structure negative third layer (9-2); the two reinforced concrete partition walls (2) are horizontally and transversely supported and reinforced through section steel supports (5); the stratum under the existing structural bottom plate (13) and the underground diaphragm wall (1) is reinforced (6) by grouting.
2. The improved structure and the reinforced structure of the underground diaphragm wall in the existing underground building as claimed in claim 1, wherein the two reinforced concrete partition walls (2) are horizontally and transversely supported and reinforced by the steel section supports (5) through the reserved door openings of the underground diaphragm wall (1), and each layer of the two steel section supports (5) are provided.
3. The structure improvement and reinforcement structure for the diaphragm wall in the existing underground building as claimed in claim 1, wherein the first existing structure minus one floor (7-1), the first existing structure minus two floors (8-1) and the first existing structure minus three floors (9-1) reinforce the floor slabs at the side of the construction area and the heavy equipment of the diaphragm wall (1) by full red scaffolds.
4. The improvement and reinforcement structure of the construction underground diaphragm wall in the existing underground building according to claim 1, characterized in that the section steel support (5) is made of I22 steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121762160.1U CN216142086U (en) | 2021-07-30 | 2021-07-30 | Structure improvement and reinforced structure of construction ground wall in existing underground building |
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| CN202121762160.1U CN216142086U (en) | 2021-07-30 | 2021-07-30 | Structure improvement and reinforced structure of construction ground wall in existing underground building |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113373998A (en) * | 2021-07-30 | 2021-09-10 | 中铁十二局集团有限公司 | Structure reconstruction and reinforcement method for constructing diaphragm wall in existing underground building |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373998A (en) * | 2021-07-30 | 2021-09-10 | 中铁十二局集团有限公司 | Structure reconstruction and reinforcement method for constructing diaphragm wall in existing underground building |
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