CN211285725U - Basin hills abrupt slope area high-rise building synthesizes earthquake-resistant structure - Google Patents

Basin hills abrupt slope area high-rise building synthesizes earthquake-resistant structure Download PDF

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CN211285725U
CN211285725U CN201921699613.3U CN201921699613U CN211285725U CN 211285725 U CN211285725 U CN 211285725U CN 201921699613 U CN201921699613 U CN 201921699613U CN 211285725 U CN211285725 U CN 211285725U
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pile
piles
slope
foundation
resistant structure
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钟志彬
王园园
邓荣贵
刘远程
张晋
孙怡
王文坡
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Southwest Jiaotong University
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Southwest Jiaotong University
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Abstract

The utility model discloses a comprehensive earthquake-resistant structure of high-rise buildings in steep slope areas of basin and hills, which comprises building group piles consisting of foundation piles arranged in a matrix form, pile plate walls arranged on side slopes and space connecting pieces for connecting the first row of foundation piles and the pile plate walls outside the building group piles; the foundation piles are connected into building group piles with local stability through transverse and longitudinal ground beams, the pile plate wall comprises retaining piles and retaining plates between adjacent retaining piles, and the space connecting piece comprises a section connecting component and a slope connecting component. The utility model discloses utilize space connecting piece to combine high-rise building foundation pile and side slope retaining pile bulkhead wall together, form a comprehensive shock-resistant structure, space connecting piece can provide extra horizontal thrust for the pile group basis, and space composite structure enables overall structure and plays good antidetonation effect simultaneously, has avoided traditional design of combatting earthquake alone, has both practiced thrift the cost, has improved holistic resistance again.

Description

Basin hills abrupt slope area high-rise building synthesizes earthquake-resistant structure
Technical Field
The utility model belongs to the technical field of the earthquake-resistant structure design, especially, relate to a hilly area slope area high-rise building pile foundation structure system and side slope retaining pile slab wall structure system combined's comprehensive earthquake-resistant structure mutually.
Background
The hilly areas of the Sichuan basin are mostly red mudstone of the Jurassic system or the stratums of the red mudstone and the argillaceous sandstone which are layered slowly and horizontally arranged. The large-volume loose covering layer at the trench part of the hilly area is thick, the thickness change of the residual loose layer at the top of the slope is large, and the slope section is often in a steep slope topography with steep and slow overlapping distribution due to the large property difference between interbedded mudstone and sandstone.
The western shift of the national industry and the urban construction need to construct various industrial and civil buildings in steep slope areas similar to hilly areas. If a large-area excavation and filling flat ground is adopted, firstly, the construction cost and potential safety hazards caused by later-stage settlement of the ground can be greatly increased, and secondly, the connection difficulty or potential safety hazards of construction site facilities and municipal facilities, regional water systems and traffic networks can also be greatly increased, so that the stepped planning design adopted in a 'guiding by potential' ground becomes the best choice for steep slope lands in hilly areas.
When a building and supporting facilities thereof are designed, the steep slope zone has the problems of excavation side slope, filling side slope and supporting and retaining reinforcement, and the building has the problems of large deformation and large bearing difference of the filling foundation and the rock mass foundation. The existing common pile-slab wall structure for the problem of the filled slope is reinforced, and the problems of uneven deformation of a building foundation and extremely low bearing capacity of the filled foundation are usually solved by adopting a reinforced concrete rock-socketed pile foundation.
The Sichuan basin is located in an influence area with a limit of an active earthquake structure of the Longmen mountain, the Wumeng mountain, the HuaYing mountain and the Qinling mountain, earthquakes occur frequently, and the intensity is relatively high. Building pile foundation and slope retaining structure all need carry out the antidetonation design, and at present both adopt respectively to design each irrelevant. For the condition that the steep slope soil filling zone and the super high-rise building have small distance with the slope edge of the slope, the following problems are difficult to overcome: (1) the length of a socketed pile foundation pile is large, the horizontal constraint and resistance of the foundation pile by filling soil around the foundation pile are small, the internal forces such as the bending moment of the socketed pile foundation pile and the like caused by earthquake power are large, and the earthquake-resistant safety risk is increased rapidly; (2) in order to meet the requirement of anti-seismic design, the socketed foundation pile is large in size, strong in structural design, small in construction space, high in difficulty and high in manufacturing cost; (3) the construction of the side slope retaining pile and the construction organization of the building rock-socketed foundation pile generate serious conflict, so that the construction efficiency is influenced, and the safety of the side slope retaining structure and the building foundation pile structure is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a basin hills abrupt slope area high-rise building synthesizes earthquake-resistant structure aims at solving the above technical problem who exists in the existing method.
In order to achieve the purpose, the utility model provides a comprehensive earthquake-resistant structure for high-rise buildings in steep slope areas of basin and hills, which comprises building group piles consisting of foundation piles arranged in a matrix form, pile plate walls arranged on the side slopes and space connecting pieces for connecting the first row of foundation piles and the pile plate walls outside the building group piles; the foundation piles are connected into building group piles with local stability through transverse and longitudinal ground beams, the pile plate wall comprises retaining piles and retaining plates between adjacent retaining piles, the space connecting piece comprises a section connecting component and a slope connecting component, one end of the section connecting component is connected with the top of the pile plate wall, the other end of the section connecting component is connected with upper and lower ground beams of the corresponding foundation pile of the pile plate wall respectively, one end of the slope connecting component is connected with the top of the pile plate wall, and the other end of the slope connecting component is connected with upper ground beams of the corresponding foundation pile of the pile plate wall respectively.
Furthermore, all the foundation piles are formed by manually digging holes, and the pile length is gradually decreased along the slope direction of the parallel side slope and the slope direction close to the side slope.
Furthermore, the cross-sectional dimension of the ground beam of the first row of foundation piles outside the building group piles is larger than that of the ground beams of other foundation piles, the top surface of the upper layer of ground beam is consistent with the elevation of the top surface of the pile foundation, and the axial elevation of the lower layer of ground beam is consistent.
Furthermore, the retaining pile is a rectangular anti-slide pile, and the width in the direction parallel to the slope direction is larger than the thickness in the direction perpendicular to the slope direction.
Furthermore, one side of the retaining pile is provided with a fixing groove for bearing a retaining plate.
Furthermore, the profile connecting component is of a delta-shaped structure formed by two connecting rods and the foundation piles, the top end of the profile connecting component is fixedly connected with the top of the pile plate wall, and the two bottom ends of the profile connecting component are respectively fixedly connected with the upper layer of ground beam and the lower layer of ground beam of the corresponding foundation pile of the pile plate wall.
Furthermore, the slope connecting component is of a right-angled triangular truss structure formed by two connecting rods, the top end of the slope connecting component is fixedly connected with the top of the pile board wall, and the two bottom ends of the slope connecting component are respectively and fixedly connected with foundation pile upper-layer ground beams on the two sides of the corresponding foundation pile of the pile board wall.
Further, the slope surface connection member is provided at an acute angle ranging from 10 ° to 45 °.
Furthermore, the space connecting piece, the pile plate wall and the foundation pile are fixedly connected in a spherical hinge mode.
Furthermore, the intersection corners of the connecting rods of the space connecting pieces are fixedly connected in a fillet transition mode.
The utility model has the advantages that: the utility model discloses utilize space connecting piece to combine high-rise building foundation pile and side slope retaining pile bulkhead wall together, form a comprehensive shock-resistant structure, space connecting piece can provide extra horizontal thrust for the pile group basis, and space composite structure enables overall structure and plays good antidetonation effect simultaneously, has avoided traditional design of combatting earthquake alone, has both practiced thrift the cost, has improved holistic resistance again.
Drawings
FIG. 1 is a front view of the comprehensive earthquake-resistant structure of high-rise buildings in steep slope areas of basin and hill;
FIG. 2 is a sectional view taken along line A-A;
FIG. 3 is a top view of the comprehensive earthquake-resistant structure of the high-rise building in the steep slope of the basin and hills of the present invention;
FIG. 4 is a schematic diagram of a longitudinal force analysis of a spatial joint;
FIG. 5 is a stress analysis diagram of an upper truss of the space connecting piece;
FIG. 6 is an equivalent diagram of the calculation of the stress of the upper truss of the spatial connection member;
fig. 7 is an equivalent diagram of the calculation of the stress of the lower truss of the space connecting piece.
Wherein the reference numerals are: 1-foundation pile, 2-ground beam, 3-retaining pile, 4-retaining plate, 5-section connecting component and 6-slope connecting component.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The embodiment of the utility model provides a main solution does:
as shown in fig. 1-3, a comprehensive earthquake-resistant structure for high-rise buildings in steep slope areas of basin and hills comprises building group piles consisting of foundation piles 1 arranged in a matrix form, pile plate walls arranged on the side slopes, and space connectors connecting the first row of foundation piles 1 and the pile plate walls outside the building group piles.
In an optional embodiment of the present invention, the utility model discloses according to the plane position and the plane size of planning building preliminary design, vertical section height and vertical section size and cross dimension to and relevant structural design parameter, technical requirement and relevant standard requirement, confirm the height of grouted pile root and size and pile top, the grouted pile plane adopts the matrix arrangement.
The construction group piles are all formed by manually digging holes, the strength of concrete of a pile body is C30, the pile length is determined according to the worst load combination under the limit state of normal use of the proposed building on the steep slope and in consideration of the anti-seismic requirement and the determined plane size of the pile foundation, and the pile length is decreased progressively along the slope direction of the parallel side slope and the slope direction close to the side slope.
The foundation piles 1 are connected together in a transverse and longitudinal mode and in a mode of upper and lower floor beams to form a locally stable building group pile. In order to facilitate the construction of the space connectors, the section size of the ground beam 2 of the first row of foundation piles 1 outside the building group piles (i.e. on the side close to the pile plate wall) is larger than that of the ground beams 2 of other foundation piles 1, and the top surface of the upper layer ground beam 2 is consistent with the top surface elevation of the pile foundation. The axis elevation of lower floor's grade beam 2 is unanimous, and the upper and lower distance that is close to the first row of tie beam in stake siding wall one side is different with all the other rows of tie beam upper and lower distances, can set for according to particular case, reserves reinforcing bar connection space connecting piece when being close to the first row of grade beam in stake siding wall one side 2 and foundation pile 1 construction.
In an optional embodiment of the utility model, the utility model discloses a geotechnical engineering investigation report according to the abrupt slope district combines to establish the building filled soil district and uses the load on the side slope and confirms the potential slip surface of this abrupt slope, combines the seismic coefficient requirement, confirms the sheet pile wallboard thickness, the plane size and the stake footpath of stake, and the size below the dress bottom embedding potential slip surface is five times shortest stake width at least.
The pile plate wall comprises the retaining piles 3 and the retaining plates 4 between the adjacent retaining piles 3, the retaining piles 3 adopt rectangular slide-resistant piles, and because the worst load and bending moment borne by the pile plate wall are both from the direction of a parallel slope, the width of the retaining piles 3 in the direction of the parallel slope is larger than the thickness of the retaining piles in the direction of a vertical slope, and the width-thickness ratio is controlled to be 1.5-2.0 times.
One side of the retaining pile 3 fixed retaining plate 4 is provided with the fixed recess that bears retaining plate 4, and retaining plate 4 acts on the combination of similar "waist rail" and "hat beam", makes the better linking together of campshed, strengthens holistic stability, and the reinforcing bar that will reserve and be connected with the space spare is constructed to top suitable position to the piling slab wall system.
In an optional embodiment of the present invention, the first row of foundation piles 1 outside the building group piles of the present invention is connected to the pile slab wall by cast-in-place reinforced concrete space connectors.
The space connecting piece comprises a section connecting component 5 and a slope connecting component 6, one end of the section connecting component 5 is connected with the top of the pile board wall, the other end of the section connecting component 5 is connected with the upper layer and the lower layer of ground beams 2 of the corresponding foundation piles 1 of the pile board wall respectively, the upper part of the joint is of an upper building structure, one end of the slope connecting component 6 is connected with the top of the pile board wall, and the other end of the slope connecting component 6 is connected with the upper layer of ground beams 2 of the corresponding foundation piles 1 on two sides of the pile board wall respectively.
The profile connecting component 5 is of a delta-shaped structure formed by two connecting rods and a foundation pile, the top end of the profile connecting component 5 is fixedly connected with the top of a pile plate wall, two bottom ends of the profile connecting component 5 are fixedly connected with an upper layer of ground beam 2 and a lower layer of ground beam 2 of a corresponding foundation pile 1 of the pile plate wall respectively, and specifically, the tip of the delta-shaped structure is connected with reserved steel bars of a plate pile in a pile plate wall supporting system and reserved steel bars of a building pile foundation close to one side of the pile plate wall and reserved steel bars of a connecting tie beam at the upper layer and the lower layer respectively.
The slope connecting component 6 is a right-angled triangular truss structure formed by two connecting rods, namely, the right-angled triangular truss is in a crossed symmetrical design in the horizontal direction, so that the stress uniformity of the whole structure is facilitated, the stress concentration is avoided, and a good anti-seismic effect is achieved; the top end of the slope connecting component 6 is fixedly connected with the top of the pile board wall, and the two bottom ends of the slope connecting component 6 are respectively and fixedly connected with the upper layer ground beam 2 of the foundation pile 1 at the two sides of the foundation pile 1 corresponding to the pile board wall.
In particular, the acute angle range of the ramp face connection member 6 is set to 10 ° to 45 °.
The profile connecting member 5 and the slope connecting member 6 firmly combine the pile plate wall and the pile group foundation into a whole by utilizing the stability of the triangle, the slope connecting member 6 can provide extra horizontal thrust for the pile group foundation horizontally upwards, and meanwhile, the space combination structure enables the whole structure to play a good anti-seismic role, so that the traditional single anti-seismic design is avoided, the cost is saved, and the integral resistance is improved.
The space connecting piece is fixedly connected with the pile plate wall and the foundation pile 1 in a spherical hinge mode; in the space connecting piece work progress, the form fixed connection that the connecting rod of space connecting piece and the intersection corner of connecting rod adopted the fillet transition plays the effect that reduces stress concentration when being convenient for cast in situ.
The utility model discloses pile slab wall system and building crowd pile foundation are under construction simultaneously, and the method that can adopt the concrete mortar of spouting carries out the sclerosis concretion to the slope body top layer in the interim.
Consider cost and construction technology's restriction, the utility model discloses only be applicable to the less condition of distance in abrupt slope fill soil area super high-rise building basis outer fringe and slope retaining structure, the distance should be 0-1.2 with the ratio of retaining pile cantilever end height.
The utility model discloses below combine space connecting piece atress analysis to explain the design calculation method of synthesizing anti-seismic structure.
(1) The stress of the building foundation system is the product of the worst combined load and the stability coefficient and the earthquake resistance coefficient of the side slope under the limit state of normal use of the building, and the design and the reinforcement of the building foundation pile are the same as the specification.
(2) The stress of the pile-slab wall system is the product of the downward sliding force of the potential slip surface of the steep slope and the seismic coefficient, and the design and the reinforcement of the piles and the slabs are the same as the specification.
(3) The connection of the connecting piece, the retaining pile plate wall, the building foundation pile and the underground connecting beam is spherical hinge joint, and the bending moment is not considered.
(4) The generalized connecting member calculation model can be calculated according to the truss structure. The truss structure comprises an upper truss structure and a lower truss structure, wherein the upper truss structure is positioned on the upper side of the triangular truss structure, the lower truss structure is positioned on the lower side of the triangular truss structure, a longitudinal stress analysis schematic diagram is shown in figure 4, an upper truss stress analysis diagram is shown in figure 5, a stress equivalence diagram is shown in figure 6, and a lower truss stress equivalence diagram is shown in figure 7.
(5) The load borne by the connecting piece is the combined force of the uniformly distributed steep slope downward sliding force considering the shock resistance coefficient and the uniformly distributed force in the equivalent pile forming distance range of the load borne by the connecting piece, and the combined force is shown in fig. 5 and fig. 6, wherein the stress share ratio of the upper-layer truss to the lower-layer truss is 2: 1.
The following is directed to the utility model discloses a synthesize anti-seismic structure's construction essential point explains.
(1) The construction method of the side slope retaining and reinforcing sheet pile wall is the same as the existing standard, but the pile top of the retaining pile is reserved with an overhanging reinforcing steel bar connected with a connecting beam;
(2) constructing a rock-socketed foundation pile of the building;
(3) constructing a foundation structure and a basement of a backfill part, wherein the construction method is the same as that of a common foundation, and the outer side of the construction method is reserved with an overhanging reinforcing steel bar connected with a connecting beam;
(3) synchronously backfilling and filling soil to the bottom of the connecting beam, and compacting according to the conventional requirement;
(4) and (3) constructing a connecting beam of the outer side structure of the building and the pile top of the side slope retaining pile plate wall.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.

Claims (10)

1. A comprehensive earthquake-resistant structure of a high-rise building in a steep slope region of a basin and a hill is characterized by comprising building group piles consisting of foundation piles (1) arranged in a matrix manner, pile plate walls arranged on a side slope and space connecting pieces for connecting the first row of foundation piles (1) and the pile plate walls outside the building group piles; the foundation pile (1) is connected into a locally stable building group pile through transverse and longitudinal ground beams (2), the pile-plate wall comprises retaining piles (3) and retaining plates (4) between the adjacent retaining piles (3), the space connecting piece comprises a section connecting component (5) and a slope connecting component (6), one end of the section connecting component (5) is connected with the top of the pile-plate wall, the other end of the section connecting component (5) is connected with the upper layer of ground beam (2) and the lower layer of ground beam (2) of the corresponding foundation pile (1) of the pile-plate wall respectively, one end of the slope connecting component (6) is connected with the top of the pile-plate wall, and the other end of the slope connecting component (6) is connected with the upper layer of ground beam (2) of the corresponding foundation pile (1) on the two sides of the pile-plate wall respectively.
2. The integrated earthquake-resistant structure of high-rise buildings in steep hilly areas of basin areas according to claim 1 is characterized in that the foundation piles (1) are all formed by manually digging holes, and the pile length decreases along the slope direction of the parallel side slopes and the slope direction close to the side slopes.
3. The integrated earthquake resistant structure of high-rise buildings in the basin, hill and steep slope zone as claimed in claim 2, wherein the cross-sectional dimension of the ground beam (2) of the first row of foundation piles (1) outside the building group piles is larger than that of the ground beams (2) of the other foundation piles (1), and the top surface of the ground beam (2) on the upper floor is in accordance with the elevation of the top surface of the pile foundation and the axial elevation of the ground beam (2) on the lower floor is in accordance with the elevation of the pile foundation.
4. The integrated earthquake resistant structure of high-rise buildings in steep hilly areas of basin and hill according to claim 1, wherein said soil-retaining piles (3) are rectangular slide-resistant piles and have a width in the direction parallel to the slope direction greater than a thickness in the direction perpendicular to the slope direction.
5. The integrated earthquake resistant structure of high-rise buildings in steep hilly areas of basin and hill according to claim 4, wherein one side of said soil retaining pile (3) is provided with a fixing groove for bearing the soil retaining plate (4).
6. The integrated earthquake-resistant structure of high-rise buildings in the basin, hills and steep slopes as claimed in any one of claims 1 to 5, wherein said profile connecting member (5) is a delta-shaped structure consisting of two connecting rods and foundation piles, the top end of said profile connecting member (5) is fixedly connected with the top of the pile slab wall, and the two bottom ends of said profile connecting member (5) are fixedly connected with the upper and lower floor beams (2) of the corresponding foundation pile (1) of the pile slab wall, respectively.
7. The integrated earthquake-resistant structure of high-rise buildings in the basin, hills and steep slopes as claimed in any one of claims 1 to 5, wherein said slope connecting member (6) is a right-angled triangular truss structure consisting of two connecting rods, the top end of said slope connecting member (6) is fixedly connected to the top of the pile slab wall, and the two bottom ends of said slope connecting member (6) are fixedly connected to the ground beams (2) on the upper layer of the foundation piles (1) on the two sides of the corresponding foundation piles (1) of the pile slab wall, respectively.
8. The integrated earthquake resistant structure of high-rise buildings in steep hilly areas according to claim 7, wherein the slope surface connecting member (6) is provided at an acute angle ranging from 10 ° to 45 °.
9. The integrated earthquake-resistant structure of high-rise buildings in steep hills and basins as claimed in claim 8, wherein the space connecting pieces are fixedly connected with the pile plate walls and the foundation piles (1) in a spherical hinge manner.
10. The integrated earthquake resistant structure of high-rise buildings in steep hilly areas of basin and hill according to claim 9, wherein the corners where the connecting rods of the space connecting pieces meet are fixedly connected in the form of rounded corner transitions.
CN201921699613.3U 2019-10-11 2019-10-11 Basin hills abrupt slope area high-rise building synthesizes earthquake-resistant structure Active CN211285725U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110593326A (en) * 2019-10-11 2019-12-20 西南交通大学 Basin hills abrupt slope area high-rise building synthesizes earthquake-resistant structure
CN113530236A (en) * 2021-07-20 2021-10-22 中国水利水电第十二工程局有限公司 Construction method for mudflat photovoltaic power station

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110593326A (en) * 2019-10-11 2019-12-20 西南交通大学 Basin hills abrupt slope area high-rise building synthesizes earthquake-resistant structure
CN113530236A (en) * 2021-07-20 2021-10-22 中国水利水电第十二工程局有限公司 Construction method for mudflat photovoltaic power station
CN113530236B (en) * 2021-07-20 2022-07-22 中国水利水电第十二工程局有限公司 Construction method for mudflat photovoltaic power station

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