CN111502028A - Wall-following multipoint sliding support structure, concrete annular platform and support method - Google Patents
Wall-following multipoint sliding support structure, concrete annular platform and support method Download PDFInfo
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- CN111502028A CN111502028A CN202010208406.4A CN202010208406A CN111502028A CN 111502028 A CN111502028 A CN 111502028A CN 202010208406 A CN202010208406 A CN 202010208406A CN 111502028 A CN111502028 A CN 111502028A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 67
- 238000002955 isolation Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/36—Bearings or like supports allowing movement
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a wall-following multipoint sliding support structure, a concrete annular platform and a support method, wherein the wall-following multipoint sliding support structure comprises a sliding support, the sliding support comprises an upper embedded part embedded at the bottom of an annular platform beam, a lower embedded part embedded at the top surface of a rock wall foundation and corresponding to the upper embedded part, and a sliding part arranged between the upper embedded part and the lower embedded part, the sliding part enables the annular platform and a rock wall to form a sliding surface, the annular platform is lapped on the rock wall of a mountain slope, and the sliding support releases the horizontal force and the horizontal displacement of the concrete annular platform on the rock wall under the condition of meeting the requirement of vertical bearing force through the multipoint sliding support, so that the problem that the horizontal force and the horizontal displacement of a main body structure are pulled to crack a rock body is effectively solved.
Description
Technical Field
The invention relates to a multipoint sliding supporting structure along a wall, a concrete annular platform and a supporting method.
Background
In the field of house construction, the current support mode of mountain area buildings constructed along rock walls mainly adopts a mode of fixedly connecting the bottom of a foundation, and the lateral side of the mountain area buildings is not generally connected with the rock walls, so that the rock walls are prevented from being pulled and cracked and damaged under the action of internal force and deformation of the lateral side connection structure. If couple together major structure and cliff, strengthen the overall stability of structure through the side direction support that increases the structure, the problem that needs to solve is that the release structure produces horizontal force and horizontal displacement to the cliff, eliminates the fracture damage to the cliff, and the connecting portion potential energy transmission vertical power bears.
In the existing project built by attaching to the rock wall, the structural system of the project is composed of a lower pier stud and a middle annular platform, and the annular platform is annularly arranged along the wall of the pit. The existing design method is to fixedly connect the lower pier stud and the platform is disconnected from the rock wall, which can ensure the relative stability between the structure and the rock wall, but cannot utilize the supporting function of the rock wall. If the annular platform is fixedly connected with the rock wall, the rock wall can support the main body structure, but the connecting part can generate larger tension fracture damage to the rock wall under the influence of operating force and deformation, and the problem is difficult to solve in the current structural design.
Disclosure of Invention
The invention aims to solve the technical problem of providing a wall-following multipoint sliding supporting structure, a concrete annular platform and a supporting method, wherein the annular platform is connected with a rock wall, can bear vertical force and release horizontal force and horizontal displacement, can horizontally slide at the position of the rock wall along the annular direction, and eliminates the tensile fracture damage to the rock wall.
In order to solve the technical problem, the invention provides a multipoint sliding supporting structure along a wall, a concrete annular platform and a supporting method, which comprise the following steps:
the utility model provides a along wall multiple spot sliding support structure, includes sliding support, sliding support includes pre-buried last built-in fitting in annular platform roof beam bottom, pre-buried lower built-in fitting that corresponds with last built-in fitting position on the rock wall basis top surface and sets up the slider between last, lower built-in fitting, the slider makes and forms the glide plane between annular platform and the rock wall.
In this embodiment, the slider is spherical slider, spherical slider includes upper bracket board, undersetting board and middle spherical crown board, the upper bracket board is fixed in the bottom of last built-in fitting, the top of built-in fitting is fixed under to the undersetting board, the undersetting board is gone up the side and is equipped with the flange all around and makes the undersetting board go up the side form and middle spherical crown board size assorted spout, middle spherical crown board top is the semicircle type, the bottom surface is the plane, upper bracket board is equipped with the recess that matches with middle spherical crown board top to undersetting board one side, middle spherical crown board bottom forms first glide plane through the spout of plane slide installation at the undersetting board, middle spherical crown board top forms the second glide plane through spherical slide sliding connection in the recess of upper bracket board.
The invention also comprises a concrete annular platform, which comprises an annular platform and the wall-following multi-point sliding bearing structure, wherein the supporting structure of the annular platform comprises an annular platform beam and a structural upright post, the bottom of the structural upright post is fixed on the ground through a fixed support, the middle part of the annular platform beam is supported on the structural upright post, and two ends of the annular platform beam are supported on the top surface of the rock wall foundation through sliding supports.
In this embodiment, the distance between the sliding center of the sliding support and the rock wall is greater than 5 m.
The invention also comprises a multipoint sliding supporting method of the concrete annular platform, and the multipoint sliding supporting structure along the wall comprises the following steps:
a. establishing a structural mechanics model, and determining the arrangement positions and the number of the annular platform beams on the rock wall according to the analysis result;
b. a sliding support is arranged at the bottom of the annular platform beam,
pre-embedding an upper embedded part at the bottom of the annular platform beam, pouring a rock wall foundation at a position corresponding to the rock wall and the annular platform beam, pre-embedding a lower embedded part on the top surface of the rock wall foundation, and connecting the annular platform beam with the rock wall foundation through a sliding part arranged between the upper embedded part and the lower embedded part;
c. and pouring the concrete annular platform on the annular platform beam.
In this embodiment, in step a, the annular platform beam needs to avoid a position where a karst cave crack exists on the rock wall.
In this embodiment, the distance between the center of the sliding member and the rock wall is greater than 5 m, and the center of the sliding member is outside the vertical sliding surface of the rock wall.
In this embodiment, in step c, before the annular platform is poured with concrete, side seal plates for preventing concrete from leaking into the sliding support are welded around the upper embedded parts, a gap around the upper embedded parts and the lower embedded parts is filled with the isolation blocks for isolation, and the isolation blocks are removed after the annular platform is finally set.
The invention has the beneficial effects that:
(1) the sliding support is arranged between the annular platform beam and the rock wall, so that the redundancy of structural connection is increased, and the overall stability of the structure is enhanced; meanwhile, the sectional dimension of the main structural member is optimized, the structural material investment is reduced, and compared with the traditional structural form, the cost can be saved and the investment can be reduced.
(2) Through the sliding supports arranged between each annular platform beam and the rock wall foundation, multi-point sliding supports are formed in the annular direction, so that the rock wall can bear vertical force generated by the annular platforms, and horizontal force and horizontal displacement generated by the structure on the rock wall are released; the annular platform can horizontally slide around the rock wall along the annular direction, so that the tensile fracture damage to the rock wall caused by the internal force and deformation of the structure is eliminated, and the relative stability between the structure and the rock wall is ensured.
(3) The method has simple process and convenient installation, and the sliding support meets the requirements of slippage and bearing capacity; the processing and manufacturing mainly adopt a mechanized mold for production, the construction is rapid and convenient, and the requirements of low carbon, environmental protection and sustainable development in the building industry are met.
In conclusion, the invention provides a structure and a method for lapping an annular platform on a rock wall of a mountain slope, which can enhance the overall stability of the annular platform, release the horizontal force and horizontal displacement of the concrete annular platform on the rock wall by arranging the sliding support under the condition of meeting the requirement of vertical bearing capacity, and effectively solve the problem that the horizontal force and horizontal displacement of the annular platform on the rock body are pulled and cracked. The invention reduces investment under the condition of meeting the requirements of bearing capacity and deformation control, and is suitable for relevant buildings constructed along the mountain side slope.
Drawings
FIG. 1 is a schematic diagram of a mechanical model for connecting an annular platform with a rock wall;
FIG. 2 is a view of the circumferential multi-point arrangement of sliding supports along the annular platform;
FIG. 3 is a diagram of a ring platform and rock wall sliding support node;
FIG. 4 is a structural view of a sliding support;
FIG. 5 is a detail view of the spherical sliding member;
FIG. 6 is a plan view of the upper embedment;
FIG. 7 is a diagram of shoe installation isolation.
In the figure, 1, an annular platform beam, 2, a rock wall, 3, a structural upright post, 4, a fixed support, 5, a sliding support, 6, an upper embedded part, 7, a spherical sliding part, 8, a lower embedded part, 9, an upper support plate, 10, a spherical sliding plate, 11, a lower support plate, 12, a stainless steel plate, 13, a plane sliding plate, 14, a middle spherical crown plate, 15, a flange, 16, a stainless steel cover plate, 17, a groove welding line, 18 and a side sealing plate; 19. and isolating the blocks.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Referring to fig. 4 to 7, the wall-following multipoint sliding support structure comprises a sliding support 5, wherein the sliding support 5 comprises an upper embedded part 6 embedded at the bottom of an annular platform beam 1, a lower embedded part 8 embedded at the top surface of a rock wall foundation and corresponding to the upper embedded part 6, and a sliding part arranged between the upper embedded part and the lower embedded part, and the sliding part enables a sliding surface to be formed between the annular platform and the rock wall. The sliding part is a spherical sliding part 7, the spherical sliding part 7 comprises an upper support plate 9, a lower support plate 11 and an intermediate spherical crown plate 14, the upper support plate 9 is fixed at the bottom of the upper embedded part 6, the lower support plate 11 is fixed at the top of the lower embedded part 8, the periphery of the upper side surface of the lower support plate 11 is provided with a flange 15, so that the upper side surface of the lower support plate 11 forms a sliding groove matched with the middle spherical crown plate 14 in size, the top of the middle spherical crown plate 14 is semi-spherical, the bottom is a plane, a groove matched with the top of the middle spherical crown plate is arranged on one side of the upper support plate 9 facing the lower support plate 11, the bottom of the middle spherical crown plate 14 is arranged in a sliding groove of the lower support plate 11 through a plane sliding plate 13 to form a first sliding surface, the top of the middle spherical crown plate 14 is connected with the groove of the upper support plate 9 in a sliding way through the spherical sliding plate 10 to form a second sliding surface. A stainless steel plate 12 is arranged in the sliding chute to increase the smoothness of the sliding chute and reduce the friction force between the planar sliding plate 13 and the sliding chute; the ribs 15 are arranged so that the intermediate spherical crown plate 14 has a displacement value of ± 150mm in each direction in the chute, and the angle of the intermediate spherical crown plate 14 is such that the second sliding surface meets the requirement of a rotation angle of 0.02 rad. The compressive strength of the spherical sliding plate 10, the plane sliding plate 13 and the middle spherical crown plate 14 is not less than 60MPa, and the ultimate compressive strength is not less than 200 MPa. The upper embedded part and the lower embedded part are made of Q345B, and each side of the cross section of the upper embedded part and the lower embedded part is 100mm wider than the spherical sliding part 7.
As shown in fig. 1 to 3, by using the above multi-point sliding bearing structure along the wall, we can make a concrete annular platform, the supporting structure of the annular platform comprises an annular platform beam and a structural upright column, the bottom of the structural upright column is fixed on the ground through a fixing support, the middle part of the annular platform beam is supported on the structural upright column, two ends of the annular platform beam are supported on the top surface of the rock wall foundation through sliding supports, and the distance between the sliding center of each sliding support and the rock wall is greater than 5 m.
The invention also comprises a multipoint sliding supporting method of the concrete annular platform, which comprises the following specific steps:
(1) establishing a mechanical model of the whole structure, setting the connection mode of the structural support,
see fig. 1. The support sets for structure stand 3, and 3 bottoms of structure stand are connected with fixing support 4, and the middle part of annular platform roof beam 1 supports at structure stand 3, and the both ends of annular platform roof beam 1 adopt sliding support 5 to be connected with 2 basic top surfaces of cliff, through increasing the overall stability of annular platform roof beam 1 and cliff side direction bearing reinforcing structure.
Specifically, the internal force and the deformation of the supports at the two ends of the annular platform beam 1 under the action of load are calculated through a mechanical model, and the vertical force and the deformation of the rock wall generated by the positions of the sliding supports of the annular platform are recorded, so that the quantity and the positions of the annular platform beam 1 and the sliding supports 5 are set.
(2) Arranged along the ring direction of the concrete platform sliding support 5 at multiple points,
see fig. 2. And the sliding support 5 is arranged in a multi-point annular manner, the sliding support 5 is arranged in a region where a karst cave crack exists in a rock body to be avoided, and the requirement that the annular platform beam 1 horizontally slides in the position of the rock wall along the annular direction is met by combining the position of the annular platform beam 1. The center of the sliding support 5 is required to be more than 5 meters away from the inner side edge of the rock wall 2 and is arranged outside the vertical sliding surface of the rock wall 2, so that the splitting damage under the action of vertical force is prevented.
(3) The node and the structural design of the sliding support 5 are carried out,
see fig. 3, 4 and 5. The sliding support 5 comprises a lower embedded part 6, a spherical sliding part 7 and an upper embedded part 8, wherein the spherical sliding part 7 enables a sliding surface to be formed between the upper platform structure beam 1 and the rock wall 2. The spherical sliding part 7 comprises an upper support plate 9, a middle spherical crown plate 14 and a lower support plate 11, a spherical sliding plate 10 is arranged between the upper support plate 9 and the middle spherical crown plate 14, and a plane sliding plate 13 and a stainless steel plate 12 with the thickness of 2mm are arranged between the middle spherical crown plate 14 and the lower support plate 11;
(4) the spherical sliding member 7 is processed and manufactured,
see fig. 4, 5. The spherical sliding support is processed and manufactured mainly to ensure the processing precision, the precision requirement of the horizontal slippage from the inner side edge of the upper support plate 9 to the flange 15 is controlled within +/-1 mm, and the slippage value meets the requirement of the support on all-directional slippage. During manufacturing, an oil storage tank is arranged to be communicated with each sliding surface, and silicone grease lubricating oil is coated in the oil storage tank to enhance sliding. Set up stainless steel apron 16 on the sliding gap between upper bracket board 9 and flange 15, stainless steel apron 16 and upper bracket board 9 fixed connection, with flange 15 swing joint, the component processing should carry out anticorrosive rust-resistant treatment, the interim fixing device of installation and dust cover before leaving the factory.
(5) The sliding support 5 is installed on site,
referring to fig. 6 and 7, a lower embedded part 8 of a sliding support 5 is embedded in the top surface of a rock wall concrete foundation, a lower support plate 11 of a spherical sliding part 7 is welded on the lower embedded part 8, a four-face angle welding seam is adopted for welding the lower support plate 11 and the lower embedded part 8, the height of the welding seam is not less than 10mm, and the welding seam is continuously and fully welded; and then welding the upper embedded part 6 on the surface of an upper support plate 9 of the spherical sliding part 7, wherein the upper embedded part 6 and the upper support plate 9 are welded by adopting a groove welding seam 17, the groove hole is arranged along four edges of the embedded part, the groove width is 50mm, the clear distance between the edge of the groove hole and the edge of the sliding part is 150mm, and the upper embedded part 6 is poured in the concrete platform structure.
(6) The concrete of the upper annular platform is poured,
see fig. 6, fig. 7. In the process of pouring the annular platform concrete, isolation measures are adopted to prevent the sliding support 5 from being poured into a whole so as to limit the sliding of the sliding support 5, and the isolation method mainly adopted is that side seal plates 18 with the height of 200mm and the thickness of 12mm are welded at the peripheral edge of the upper embedded part 6 so as to prevent the bottom of the process of pouring the concrete from leaking slurry; and an isolation block 19 is filled between the upper embedded part and the lower embedded part for isolation, wherein the isolation block 19 is a hard flame-retardant extruded sheet and is removed after the concrete of the platform structure is solidified.
Claims (9)
1. A multi-point sliding support structure along a wall, comprising: the sliding support comprises an upper embedded part embedded at the bottom of the annular platform beam, a lower embedded part embedded at the top surface of the rock wall foundation and corresponding to the upper embedded part, and a sliding part arranged between the upper embedded part and the lower embedded part, wherein the sliding part enables the annular platform and the rock wall to form a sliding surface.
2. The wall multipoint sliding support structure of claim 1, wherein: the slider is spherical slider, spherical slider includes upper bracket board, undersetting board and middle spherical crown board, the upper bracket board is fixed in the bottom of last built-in fitting, the top at built-in fitting is fixed down to the undersetting board, the side is equipped with the flange all around on the undersetting board and makes the side form and middle spherical crown board size assorted spout on the undersetting board, middle spherical crown board top is the hemisphere type, the bottom surface is the plane, upper bracket board side undersetting board one side is equipped with the recess that matches with middle spherical crown board top, middle spherical crown board bottom forms first glide plane through the spout of plane slide installation at the undersetting board, middle spherical crown board top is through spherical slide sliding connection and is formed the second glide plane in the recess of last bedplate.
3. A concrete annular platform comprising an annular platform and the wall multipoint sliding support structure of claim 1 or 2, wherein: the supporting structure of the annular platform comprises an annular platform beam and a structural upright column, the bottom of the structural upright column is fixed on the ground through a fixed support, the middle of the annular platform beam is supported on the structural upright column, and two ends of the annular platform beam are supported on the top surface of a rock wall foundation through sliding supports.
4. A concrete annular platform according to claim 1, wherein: the distance between the sliding center of the sliding support and the rock wall is larger than 5 m.
5. A multipoint slide supporting method of a concrete annular platform, using the multipoint slide supporting structure along a wall according to claim 1 or 2, characterized in that: the bottom of a structural upright column of the annular platform is fixed on the ground through a fixed support, and two ends of an annular platform beam are supported on the mountain slope rock wall foundation through sliding supports.
6. A concrete annular platform multipoint sliding support method according to claim 5, characterized in that: the method specifically comprises the following steps:
a. establishing a structural mechanics model, and determining the arrangement positions and the number of the annular platform beams on the rock wall according to the analysis result;
b. a sliding support is arranged at the bottom of the annular platform beam,
pre-embedding an upper embedded part at the bottom of the annular platform beam, pouring a rock wall foundation at a position corresponding to the rock wall and the annular platform beam, pre-embedding a lower embedded part on the top surface of the rock wall foundation, and connecting the annular platform beam with the rock wall foundation through a sliding part arranged between the upper embedded part and the lower embedded part;
c. and pouring the concrete annular platform on the annular platform beam.
7. A concrete annular platform multipoint sliding support method according to claim 6, characterized in that: in the step a, the annular platform beam needs to avoid the position with karst cave cracks on the rock wall.
8. A concrete annular platform multipoint sliding support method according to claim 6, characterized in that: the distance between the center of the sliding piece and the rock wall is larger than 5 m, and the center of the sliding piece is arranged on the outer side of the vertical sliding surface of the rock wall.
9. A concrete annular platform multipoint sliding support method according to claim 6, characterized in that: and c, before the concrete annular platform is poured, welding side seal plates for preventing concrete from leaking into the sliding support around the upper embedded part, filling a clearance between the upper embedded part and the lower embedded part with an isolation block for isolation, and dismantling the isolation block after the annular platform is finally set.
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| CN202010208406.4A CN111502028B (en) | 2020-03-23 | 2020-03-23 | Wall-following multipoint sliding support structure, concrete annular platform and support method |
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