CN109397522B - Universal precast beam pedestal suitable for soft soil geology and construction method thereof - Google Patents
Universal precast beam pedestal suitable for soft soil geology and construction method thereof Download PDFInfo
- Publication number
- CN109397522B CN109397522B CN201811459978.9A CN201811459978A CN109397522B CN 109397522 B CN109397522 B CN 109397522B CN 201811459978 A CN201811459978 A CN 201811459978A CN 109397522 B CN109397522 B CN 109397522B
- Authority
- CN
- China
- Prior art keywords
- pedestal
- movable pedestal
- embedded part
- pile
- small box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 title claims abstract description 203
- 238000010276 construction Methods 0.000 title claims abstract description 33
- 239000002689 soil Substances 0.000 title claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 41
- 239000010959 steel Substances 0.000 claims description 41
- 238000004873 anchoring Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000009417 prefabrication Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/22—Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Foundations (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a universal precast beam pedestal suitable for soft soil geology, which comprises: the pile foundation comprises a pile body; the lower fixed pedestal connected with the pile body comprises a plurality of end pedestals which are distributed at intervals and a main pedestal which is arranged between the adjacent end pedestals and is level with the end pedestals; a plurality of first embedded part groups are embedded in the lower fixed pedestal; a top movable pedestal including a T-beam movable pedestal and/or a small box-beam movable pedestal having the same longitudinal width; the T beam movable pedestal and/or the small box beam movable pedestal are/is arranged in a top movable pedestal installation area formed by the first embedded part group in an adapting mode, and a second embedded part group which is used for being connected with the first embedded part group in an adapting mode is embedded in the top movable pedestal installation area. According to the invention, the top movable pedestal mounting areas on the top movable pedestal and the lower fixed pedestal can be used for placing different types of T-beam movable pedestals and small box beam movable pedestals, so that the prefabricated pedestals with single traditional function are converted into universal prefabricated pedestals, and the requirements of prefabricated beam construction universality can be met.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a universal precast beam pedestal suitable for soft soil geology and a construction method thereof.
Background
With the rapid development of the economic society in China, the construction of infrastructure such as highway traffic is continuously enhanced, and highway bridges play a vital role in the construction of highway traffic networks. The prefabricated erection of the bridge can save the construction period and ensure the engineering quality, so the prefabricated erection becomes a widely applied construction scheme in the construction of the upper structure of the highway bridge, but generally has the following problems:
1) The southeast coastal area is a developed area of China, the construction task of highway bridges is extremely difficult, and due to the fact that the coastal area is close to the sea, thicker silt soft soil is commonly existing in geology of the area, the water content of a soil layer is large, the porosity is high, the bearing capacity is poor, and the soft soil stratum brings great difficulty to bridge prefabrication construction;
2) The prefabricated small box girder and the T-shaped girder are respectively named as two types of girders with respective cross-sectional shapes, wherein the width of the bottom plate of the small box girder is generally wider than the thickness of the bottom plate of the T-shaped girder, and the girders with the two cross-sectional shapes are widely used in bridge construction in China; because the line design is greatly influenced by the topography and crossing obstacles, the whole line is almost impossible to adopt a bridge structure with a single span or a single section, therefore, the types of the spans and the section types of the bridge which are needed to be prefabricated are more, and meanwhile, the number difference of various beam types is larger; one type of pedestal is often suitable for prefabricating beams with single span or cross section in site construction, so that part of sites are occupied when fewer beams are prefabricated, and the sites are idle after the prefabrication is finished, so that waste is caused; and when the beam prefabrication construction with a large number of later stages is difficult to meet the construction period requirement, the beam pedestal with a small number needs to be removed, and a novel pedestal is manufactured, so that the material and construction cost are increased.
Therefore, the precast beam pedestal is designed, the environmental defect of soft soil stratum can be overcome, the precast beam construction universality requirements of different spans and sections can be met, and meanwhile, the project progress is met and the project cost is saved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the universal precast beam pedestal suitable for soft soil geology and the construction method thereof.
In order to achieve the above purpose, one of the technical schemes adopted by the invention is as follows:
a universal precast beam deck suitable for soft soil geology, the precast beam deck comprising:
the pile foundation comprises a pile body;
the lower fixed pedestal is connected with the pile body and comprises a plurality of end pedestals which are distributed at intervals and a main pedestal which is arranged between the adjacent end pedestals and is level with the end pedestals; a plurality of first embedded part groups are embedded in the lower fixed pedestal;
a top movable pedestal including a T-beam movable pedestal and/or a small box-beam movable pedestal having the same longitudinal width; the T-beam movable pedestal and/or the small box beam movable pedestal are/is adapted to be placed in a top movable pedestal installation area formed by the first embedded part group, and a second embedded part group which is used for being connected with the first embedded part group in an adapting way is embedded in the top movable pedestal installation area.
On the basis of the technical scheme, a pile head connecting piece is further arranged between the pile body and the lower fixing pedestal;
a cushion layer is arranged at the bottom of the lower fixed pedestal in a flat manner, and the pile head connecting piece penetrates through the cushion layer to connect the pile body with the lower fixed pedestal;
the pile head connecting piece comprises a pile head connecting frame and core filling concrete which is used for being poured in the pile head connecting frame placed in the inner cavity of the pile body.
On the basis of the technical scheme, the pile head connecting frame comprises:
a bottom plate for acting as a pouring bottom die in the range of 0.5-1.5 m below the cushion layer;
the connecting steel bars are distributed in a circular ring array and welded on the bottom supporting plate, and the connecting steel bars form a virtual cylinder; wherein, the part of the connecting steel bar on the cushion layer is used for anchoring into the lower fixed pedestal;
the spiral stirrup is wound on the peripheral sides of the connecting steel bars and is fixed by adopting supporting steel bars.
On the basis of the technical scheme, the part of the connecting steel bar on the cushion layer is outwards bent by 12-18 degrees.
On the basis of the technical scheme, the first embedded part group is connected with the second embedded part group which is connected with the first embedded part group in an adapting mode through a triangular connecting steel plate.
On the basis of the technical scheme, the top movable pedestal further comprises:
the edge-wrapping angle steel is arranged on the edges of the T-beam movable pedestal and/or the small box beam movable pedestal; the edge-wrapping angle steel is used for being connected with the stainless steel bottom die;
the embedded pull rod holes are arranged in the T-beam movable pedestal and/or the small box beam movable pedestal; and
and the hanging rings are arranged on the T beam movable pedestal and/or the small box beam movable pedestal.
On the basis of the technical scheme, two tubular pile foundations for bearing concentrated loads after arching of the beams Duan Zhangla are transversely arranged at the bottom of the end pedestal;
and a plurality of tubular pile foundations for uniformly sharing the load of the beam section in pouring are arranged at the bottom longitudinal interval of the main pedestal.
In order to achieve the purpose, the second technical scheme adopted by the invention is as follows:
the construction method of the precast beam pedestal comprises the following steps:
calibrating pile positions of the tubular pile foundations, and constructing the tubular pile foundations;
pouring an end pedestal and a main pedestal on the tubular pile foundation, and forming an integral beam structure;
embedding a plurality of first embedded part groups on the end pedestal and the main pedestal;
placing a top movable pedestal embedded with a second embedded part group in a top movable pedestal installation area formed by the first embedded part group, and connecting the first embedded part group with the second embedded part group which is adaptively connected; wherein the top movable pedestal comprises a T-beam movable pedestal and/or a small box beam movable pedestal with the same longitudinal width, and the top movable pedestal placed in the top movable pedestal mounting area is at least one of the T-beam movable pedestal and the small box beam movable pedestal.
On the basis of the technical scheme, the construction method of the tubular pile foundation comprises the following steps of:
driving a pile body at a calibrated pile position, and placing a prefabricated pile head connecting frame into an inner cavity of the pile body;
and pouring core filling concrete into the pile head connecting frame in the pile body inner cavity.
On the basis of the technical scheme, the first embedded part group and the second embedded part group which are adaptively connected are welded and connected by adopting a triangular connecting steel plate;
and if the movable pedestal of the T beam is replaced by the movable pedestal of the small box beam or the movable pedestal of the small box beam is replaced by the movable pedestal of the T beam, the connecting steel plates are replaced after being sheared off, and the triangular connecting steel plates are welded and connected again.
Compared with the prior art, the invention has the advantages that:
the invention provides a universal precast beam pedestal suitable for soft soil geology and a construction method thereof, the invention realizes the prefabrication function of various box girders with different spans by arranging a plurality of end pedestals on a lower fixed pedestal, and the top movable pedestal and the lower fixed pedestal can be used for placing different types of T-beam movable pedestals and small box girder movable pedestals, so that the traditional precast pedestal with single function is converted into a universal precast pedestal, and the construction universality requirements of precast beams with different spans and sections can be met; the lower part fixed pedestal is effectively connected with the tubular pile foundation, and the upper part load is transferred to the tubular pile foundation through the whole beam type structure of the lower part fixed pedestal, wherein, the pile body can go deep into the strong weathered rock stratum, effectively reduces the subsidence of the prefabricated pedestal in the soft soil geology, and overcomes the environmental defect of the soft soil stratum. The invention has the characteristics of strong applicability and convenient and quick remanufacturing construction, and can simultaneously meet the project progress and save the project cost.
Drawings
FIG. 1 is a front view of an overall elevation arrangement of an embodiment of the present invention;
FIG. 2 is a plan view distribution diagram of a tubular pile foundation according to an embodiment of the present invention;
FIG. 3 is a plan view showing a planar arrangement of a movable pedestal of a T-beam according to an embodiment of the present invention;
FIG. 4 is a plan view showing a state in which a movable pedestal of a small box girder is arranged in a plane in accordance with an embodiment of the present invention;
FIG. 5 is a front cross-sectional view of a pile head connector according to an embodiment of the present invention;
FIG. 6 is a B-B cross-sectional view of FIG. 5;
FIG. 7 is a left side view of a T-beam mobile pedestal according to an embodiment of the present invention;
FIG. 8 is a left side view of a small box girder mobile pedestal according to an embodiment of the present invention;
FIG. 9 is a C-C cross-sectional view of FIG. 8;
fig. 10 is a front view of a connecting steel plate according to an embodiment of the present invention.
In the figure: 1-tubular pile foundation, 11-pile head connecting pieces, 111-bottom supporting plates, 112-connecting steel bars, 113-spiral stirrups, 114-supporting steel bars, 115-core filling concrete, 116-cushion layers, 12-pile shafts, 2-lower fixed pedestals, 21-main pedestals, 22-end pedestals, 3-top movable pedestals, 31-T beam movable pedestals, 32-small box beam movable pedestals, 33-edge-wrapping angle steel, 34-hanging rings, 35-embedded pull rod holes, 41-first embedded part groups, 42-second embedded part groups and 43-connecting steel plates.
Detailed Description
The following description of the embodiments of the present invention will be made in detail and with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. It is noted that all of the figures are exemplary representations. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
Examples
Referring to fig. 1 to 4, the embodiment of the invention provides a universal precast beam pedestal suitable for soft soil geology, which comprises a tubular pile foundation 1, a lower fixed pedestal 2 and a top movable pedestal 3; the tubular pile foundation 1 comprises a pile body 12, wherein the pile body 12 is a finished pile body which can penetrate into a strong weathered rock stratum; a lower fixed pedestal 2 connected to the pile body 12, and comprising a plurality of end pedestals 22 spaced apart from each other and a main pedestal 21 disposed between the adjacent end pedestals 22 and flush with the end pedestals; a plurality of first embedded part groups 41 are embedded on the lower fixed pedestal 2; the top movable pedestal 3 includes a T-beam movable pedestal 31 and/or a small box-beam movable pedestal 32 having the same longitudinal width; the T-beam movable pedestal 31 and/or the small box-beam movable pedestal 32 are/is adapted to be placed in a top movable pedestal mounting area formed by the first embedded part group 41, and a second embedded part group 42 adapted to be connected with the first embedded part group 41 is embedded.
Further, let the prefabricated size of the T-beam movable pedestal 31/the small box-beam movable pedestal 32 be a×b×c, where a represents a longitudinal width, b represents a lateral width, and c represents a vertical height in m; the prefabricated sizes of the T-beam movable pedestal 31 and the small box-beam movable pedestal 32 are 1m×1m×0.3m and 1m×0.6m×0.3m, respectively. After the construction of the tubular pile foundation and the lower stationary pedestal is completed, the corresponding T-beam movable pedestal 31 and the small box beam movable pedestal 32 are installed according to actual conditions.
In the embodiment of the invention, as shown in fig. 1, the fixed beam end of the precast beam pedestal is provided with an end pedestal, the movable beam end is provided with a plurality of end pedestals, and the end pedestals are additionally arranged on the movable end beam according to the actual beam span type so as to adapt to the construction of more span precast beams. The fixed beam end and the movable beam end of the precast beam pedestal are common terms of a continuous beam or simply supported beam system, and are therefore not labeled in the figures.
The invention provides a universal precast beam pedestal suitable for soft soil geology and a construction method thereof.
The lower fixing pedestal is effectively connected with a pipe pile foundation, is a high-strength prestress pipe pile foundation, transmits upper load to the pipe pile foundation through the integral beam structure of the lower fixing pedestal, is a PHC pipe pile foundation in the embodiment of the invention, wherein the pile body is of a finished product structure, can effectively ensure that the quality of the pipe pile foundation meets the design requirement, can go deep into a strong weathered rock stratum, effectively reduces sedimentation of the prefabrication pedestal in soft soil geology, and overcomes the environmental defects of soft soil strata.
As a preferred mode of the embodiment of the present invention, as shown in fig. 5, a pile head connector 11 is further provided between the pile body 12 and the lower fixing base 2; a cushion layer 116 is arranged at the bottom of the lower fixed pedestal 2 in a flat manner, and the pile head connecting piece 11 penetrates through the cushion layer 116 to connect the pile body and the lower fixed pedestal 2; pile head connector 11 includes a pile head connector frame and core filling concrete 115 for casting into the pile head connector frame placed in the cavity of pile body 12. Pile head connecting piece 11 transmits upper load to pile body 12, and then pile body 12 transmits the upper load to stratum; the pile body is also effectively connected with the pile body; the core filling concrete is effectively connected with the pile body through the friction force of the hole wall, so that the load transmission is ensured.
Further, as shown in fig. 5 to 6, the pile head connecting frame includes a bottom plate 111, a connecting reinforcing bar 112 and a spiral stirrup 113; the bottom pallet 111 is used to act as a pouring bottom mold in the range of 0.5-1.5 m below the cushion layer 116, in this embodiment 1m below the cushion layer 116; a plurality of connection bars 112 distributed in a circular array are welded on the bottom supporting plate 111, and the connection bars 112 form a virtual cylinder; wherein the portion of the connecting bar 112 located on the mat 116 is used for anchoring into the lower fixing base 2; the spiral stirrup 113 is wound around the outer circumferential sides of the plurality of connection bars 112 and is fixed using support bars 114. The connecting bars 112 have one end embedded in the concrete in the lower fixing base 2 and the other end embedded in the core concrete, so that the core concrete is effectively connected with the lower fixing base 2.
Further, the portion of the connecting steel bar 112 located on the cushion layer 116 is bent outwards by 12-18 degrees; in this embodiment, in particular 15 °, it increases the stability of the connection between the lower stationary table-base 2 and the shaft.
Specifically, as shown in fig. 10, the first embedded part group 41 is connected with the second embedded part group 42 that is connected in an adapting manner by adopting a triangular connection steel plate 43. If the movable T-beam seat 31 is replaced with the movable small box-beam seat 32 or the movable small box-beam seat 32 is replaced with the movable T-beam seat 31, the connecting steel plates 43 are cut off and then replaced and welded and connected again by adopting the triangular connecting steel plates 43, so that the cost and the resources are saved, and the construction time is also reduced.
As a preferred mode of the embodiment of the present invention, as shown in fig. 7 to 9, the top movable stand 3 further includes a binding angle 33, a pre-buried pull rod hole 35, and a hanging ring 34; the edge-wrapping angle steel 33 is arranged on the edges of the T-beam movable pedestal 31 and/or the small box beam movable pedestal 32; the edge-wrapping angle steel 33 is used for being connected with a stainless steel bottom die; the embedded pull rod holes 35 are arranged in the T-beam movable pedestal 31 and/or the small box beam movable pedestal 32; a lifting ring 34 is provided on the T-beam mobile abutment 31 and/or the small box beam mobile abutment 32. The width of the bottom plate of the small box girder movable pedestal 32 is 1m, the span of the bottom plate of the T-girder movable pedestal 31 is 0.6m, and the box girder is prefabricated in a side mold package bottom mold mode for adapting to girder bodies with different heights. Hanging rings 34 are pre-embedded at the tops of the T-beam movable pedestal 31/the small box beam movable pedestal 32, so that the hoisting construction is facilitated; the arranged edge-covering angle steel 33 is used for protecting the edges of the pedestal and is used for welding and fixing a steel bottom die which is a common technical means for the person in the field, is not marked in the figure, and the top of the lower fixing pedestal is kept horizontal due to the fact that the span center position of the beam and the designed pre-camber are not unique, and the pre-camber is arranged at the steel bottom die according to the design requirement; the pre-embedded tie holes 35, i.e. PVC pre-holes, are longitudinally spaced 0.5m in this embodiment, 0.25m from the end for passing the side form tie bolts.
Further, the top movable pedestals 3 are disposed on the lower fixed pedestals, and a 525-1300 mm lifting slot is reserved between every two adjacent top movable pedestals 3, which is a conventional operation in the art, and therefore, is not labeled in the figure; when the beam is manufactured, a drop template and a wedge block are arranged in a hoisting slot hole at the inner side of the beam end, and when the beam is lifted, the wedge block and the drop template are removed, the hanging beam is inserted, and the hanging beam section is lifted.
Further, as shown in fig. 2, two tubular pile foundations 1 for bearing the concentrated load after the beams Duan Zhangla are arched are transversely arranged at the bottom of the end pedestal 22 and are used for bearing the concentrated load after the beams Duan Zhangla are arched; a plurality of tubular pile foundations 1 for uniformly sharing the load of the beam section pouring are arranged at the bottom longitudinal spacing of the main pedestal 21 and are used for uniformly sharing the load of the beam section pouring. Under the premise of ensuring that the bearing layer at the bottom of the 1 pile of the tubular pile foundation is a strong weathered rock layer, different pile diameters are selected according to the load size and different end pedestals and main pedestals, the tubular pile foundation is safe and reliable in stress, economical and reasonable, and finally the universality of precast beam pedestals with different spans is realized.
The embodiment of the invention also provides a construction method of the precast beam pedestal, which comprises the following steps:
calibrating pile positions of the tubular pile foundation 1, and constructing the tubular pile foundation 1;
pouring an end pedestal 22 and a main pedestal 21 on the tubular pile foundation 1, and forming an integral beam structure;
embedding a plurality of first embedded part groups 41 on the end pedestal 22 and the main pedestal 21;
placing a top movable pedestal 3 in which a second embedded part group 42 is embedded in a top movable pedestal installation area formed by the first embedded part group 41, and connecting the first embedded part group 41 with the second embedded part group 42 which is adaptively connected; wherein the top movable pedestal 3 includes a T-beam movable pedestal 31 and/or a small box beam movable pedestal 32 having the same longitudinal width, and the top movable pedestal 3 placed in a top movable pedestal mounting area is at least one of the T-beam movable pedestal 31 and the small box beam movable pedestal 32.
Further, the step of constructing the tubular pile foundation 1 includes:
driving the pile body 12 at the calibrated pile position, and placing a prefabricated pile head connecting frame into the inner cavity of the pile body 12;
core concrete 115 is poured into the pile head coupler in the interior cavity of pile body 12.
Further, the pile head connecting frame comprises a bottom supporting plate 111, connecting steel bars 112 and spiral stirrups 113; the bottom plate 111 is used as a pouring bottom die within the range of 0.5-1.5 m below the cushion layer 116; a plurality of connection bars 112 distributed in a circular array are welded on the bottom supporting plate 111, and the connection bars 112 form a virtual cylinder; wherein the portion of the connecting bar 112 located on the mat 116 is used for anchoring into the lower fixing base 2; the spiral stirrup 113 is wound around the outer circumferential sides of the plurality of connection bars 112 and is fixed using support bars 114. The connecting bars 112 have one end embedded in the concrete in the lower fixing base 2 and the other end embedded in the core concrete, so that the core concrete is effectively connected with the lower fixing base 2.
After the construction of the cushion layer 116 is completed, as shown in fig. 5 to 6, six connecting bars 112 and a bottom support plate 111 are firmly welded, spiral bars 113 are bound, the whole pile body is lowered to a position 1m below a pile head on the pile body, the top of the connecting bars 112 is bent for 15 degrees, an external leakage 30cm is anchored into a lower fixing pedestal, the pile head is connected with and supports the connecting bars 112 by three supporting bars 114, and then C30 core filling concrete 115 is poured.
Specifically, as shown in fig. 10, the first embedded part group 41 and the second embedded part group 42 that are adaptively connected are welded and connected by adopting a triangular connecting steel plate 43; when the T-beam movable base 31 is replaced with the small box-beam movable base 32 or the small box-beam movable base 32 is replaced with the T-beam movable base 31, the connection steel plate 43 is cut off and then replaced and welded and connected again by adopting the triangular connection steel plate 43.
The invention is not limited to the above-mentioned best mode, any person can obtain other various products under the teaching of the invention, but any change in shape or structure is within the scope of protection of the invention, and all the technical schemes are the same or similar to the invention.
Claims (8)
1. Be suitable for general precast beam pedestal of weak soil geology, its characterized in that, precast beam pedestal includes:
a tubular pile foundation (1) comprising a pile body (12);
a lower fixed pedestal (2) connected with the pile body (12), comprising a plurality of end pedestals (22) which are distributed at intervals and a main pedestal (21) which is arranged between the adjacent end pedestals (22) and is level with the end pedestals; a plurality of first embedded part groups (41) are embedded in the lower fixed pedestal (2);
a top movable pedestal (3) including a T-beam movable pedestal (31) and/or a small box-beam movable pedestal (32) having the same longitudinal width; the T-beam movable pedestal (31) and/or the small box beam movable pedestal (32) are/is adapted to be placed in a top movable pedestal installation area formed by the first embedded part group (41), and a second embedded part group (42) which is used for being connected with the first embedded part group (41) in an adapting mode is embedded in the T-beam movable pedestal (31) and/or the small box beam movable pedestal (32);
a pile head connecting piece (11) is further arranged between the pile body (12) and the lower fixing pedestal (2);
a cushion layer (116) is arranged at the bottom of the lower fixed pedestal (2) in a flat manner, and the pile head connecting piece (11) penetrates through the cushion layer (116) to connect the pile body with the lower fixed pedestal (2);
the pile head connecting piece (11) comprises a pile head connecting frame and core filling concrete (115) which is used for being poured in the pile head connecting frame placed in the inner cavity of the pile body (12);
the first embedded part group (41) is connected with the second embedded part group (42) which is connected with the adapter by adopting a triangular connecting steel plate (43).
2. A universal precast beam deck for soft soil geology as claimed in claim 1, wherein the pile head connecting frame comprises:
-a bottom plate (111) for acting as a pouring bottom die in the range of 0.5-1.5 m below the cushion layer (116);
a plurality of connecting steel bars (112) distributed in a circular array, which are welded on the bottom supporting plate (111), wherein the connecting steel bars (112) form a virtual cylinder; wherein the portion of the connecting bar (112) located on the mat (116) is used for anchoring into the lower stationary pedestal (2);
and spiral stirrups (113) which are wound on the outer peripheral sides of the connecting steel bars (112) and are fixed by adopting supporting steel bars (114).
3. A universal precast beam deck suitable for soft soil geology according to claim 2, characterized in that the portion of the connecting steel bar (112) located on the cushion layer (116) is bent outwards by an angle of 12-18 °.
4. A universal precast beam deck suitable for soft soil geology according to claim 1, characterized in that the top mobile deck (3) further comprises:
a wrapping angle steel (33) which is arranged on the edges of the T-beam movable pedestal (31) and/or the small box beam movable pedestal (32); the edge-wrapping angle steel (33) is used for being connected with the stainless steel bottom die;
a pre-buried pull rod hole (35) which is arranged in the T-beam movable pedestal (31) and/or the small box beam movable pedestal (32); and
and hanging rings (34) arranged on the T-beam movable pedestal (31) and/or the small box beam movable pedestal (32).
5. A universal precast beam deck for soft soil geology according to claim 1, characterized in that the bottom of the end deck (22) is laterally arranged with two tubular pile foundations (1) for bearing concentrated loads after arching of the beams Duan Zhangla;
a plurality of tubular pile foundations (1) for uniformly sharing the load of the beam section in pouring are arranged at the bottom longitudinal distance of the main pedestal (21).
6. A method of constructing a precast beam deck according to any one of claims 1 to 5, characterized in that the steps of the construction method include:
calibrating pile positions of the tubular pile foundation (1), and constructing the tubular pile foundation (1);
pouring an end pedestal (22) and a main pedestal (21) on the tubular pile foundation (1) and forming an integral beam structure;
a plurality of first embedded part groups (41) are embedded on the end pedestal (22) and the main pedestal (21);
placing a top movable pedestal (3) embedded with a second embedded part group (42) in a top movable pedestal installation area formed by the first embedded part group (41), and connecting the first embedded part group (41) with the second embedded part group (42) which is connected in an adapting way; wherein the top movable pedestal (3) comprises a T-beam movable pedestal (31) and/or a small box-beam movable pedestal (32) with the same longitudinal width, and the top movable pedestal (3) placed in a top movable pedestal mounting area is at least one of the T-beam movable pedestal (31) and the small box-beam movable pedestal (32).
7. A construction method according to claim 6, characterized in that the step of constructing the tubular pile foundation (1) comprises:
driving a pile body (12) at a calibrated pile position, and placing a prefabricated pile head connecting frame into an inner cavity of the pile body (12);
core concrete (115) is poured into the pile head connecting frame in the inner cavity of the pile body (12).
8. The construction method according to claim 6, characterized in that the first embedded part group (41) and the second embedded part group (42) which are adaptively connected are welded and connected by adopting a triangular connecting steel plate (43);
and if the T-beam movable pedestal (31) is replaced by the small box beam movable pedestal (32) or the small box beam movable pedestal (32) is replaced by the T-beam movable pedestal (31), the connecting steel plate (43) is cut off and then replaced and welded and connected by adopting the triangular connecting steel plate (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811459978.9A CN109397522B (en) | 2018-11-30 | 2018-11-30 | Universal precast beam pedestal suitable for soft soil geology and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811459978.9A CN109397522B (en) | 2018-11-30 | 2018-11-30 | Universal precast beam pedestal suitable for soft soil geology and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109397522A CN109397522A (en) | 2019-03-01 |
| CN109397522B true CN109397522B (en) | 2023-11-28 |
Family
ID=65456709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811459978.9A Active CN109397522B (en) | 2018-11-30 | 2018-11-30 | Universal precast beam pedestal suitable for soft soil geology and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109397522B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666953A (en) * | 2019-10-25 | 2020-01-10 | 石家庄铁道大学 | High-speed railway beam-making pedestal suitable for unfavorable geology and construction method thereof |
| CN114687372A (en) * | 2022-03-23 | 2022-07-01 | 保利长大工程有限公司 | Prefabricated beam pedestal miniature steel pipe pile compression-resistant foundation and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202097833U (en) * | 2011-05-24 | 2012-01-04 | 中铁四局集团第一工程有限公司 | Steel-concrete girder fabricating pedestal with small independent concrete foundations |
| CN105178352A (en) * | 2015-09-25 | 2015-12-23 | 重庆建工市政交通工程有限责任公司 | Bench for prefabricating adjustable T-type beams with non-equal spans and different bottom widths and construction method of bench |
| KR20160104258A (en) * | 2015-02-26 | 2016-09-05 | 컨텍이앤씨 주식회사 | Movable scaffolding system mounted upper-structure of bridge and bridge construction method therewith |
| CN106985274A (en) * | 2017-04-24 | 2017-07-28 | 中铁四局集团有限公司 | Prefabricated pedestal of general type CRTSIII type track board |
| CN207480855U (en) * | 2017-11-07 | 2018-06-12 | 内蒙古路桥集团有限责任公司 | A kind of combined steel gantry seat for acting on precast beam |
| CN209615940U (en) * | 2018-11-30 | 2019-11-12 | 中铁大桥局集团第四工程有限公司 | A kind of universal precast beam pedestal being applicable in Soft Clay |
-
2018
- 2018-11-30 CN CN201811459978.9A patent/CN109397522B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202097833U (en) * | 2011-05-24 | 2012-01-04 | 中铁四局集团第一工程有限公司 | Steel-concrete girder fabricating pedestal with small independent concrete foundations |
| KR20160104258A (en) * | 2015-02-26 | 2016-09-05 | 컨텍이앤씨 주식회사 | Movable scaffolding system mounted upper-structure of bridge and bridge construction method therewith |
| CN105178352A (en) * | 2015-09-25 | 2015-12-23 | 重庆建工市政交通工程有限责任公司 | Bench for prefabricating adjustable T-type beams with non-equal spans and different bottom widths and construction method of bench |
| CN106985274A (en) * | 2017-04-24 | 2017-07-28 | 中铁四局集团有限公司 | Prefabricated pedestal of general type CRTSIII type track board |
| CN207480855U (en) * | 2017-11-07 | 2018-06-12 | 内蒙古路桥集团有限责任公司 | A kind of combined steel gantry seat for acting on precast beam |
| CN209615940U (en) * | 2018-11-30 | 2019-11-12 | 中铁大桥局集团第四工程有限公司 | A kind of universal precast beam pedestal being applicable in Soft Clay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109397522A (en) | 2019-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107268366B (en) | Assembled wallboard and pile plate combined soilless roadbed | |
| CN113652966B (en) | Construction method of full-prefabricated assembly type concrete beam type bridge structure system | |
| KR101026014B1 (en) | Bridge deck construction method by means of pulling jack on the water | |
| CN109397522B (en) | Universal precast beam pedestal suitable for soft soil geology and construction method thereof | |
| CN109162204B (en) | Construction method for transverse block rapid assembling of bridge substructure | |
| CN110886217B (en) | Precast prestressed concrete anchor beam structure for anchoring stay cable and bridge tower | |
| CN111851252A (en) | Steel-concrete combined arch bridge crossing karst cave in tunnel and construction method thereof | |
| CN116677003A (en) | Construction process of offshore bridge high-pile cap | |
| CN209615940U (en) | A kind of universal precast beam pedestal being applicable in Soft Clay | |
| CN111764291B (en) | Construction method of separated railway bridge steel-concrete transition section structure | |
| CN211897785U (en) | Bias-pressure subway station and viaduct combined construction structure | |
| CN111827239A (en) | Construction method of assembled berthing pier | |
| JP2008274567A (en) | Circular steel pipe prefabricated bridge and its construction method | |
| GB2518356A (en) | Method of suspension bridge construction | |
| CN217419282U (en) | Prefabricated small box girder | |
| CN216688983U (en) | Prefabricated assembled invisible bent cap | |
| CN215668978U (en) | Steep-slope bridge pier body structure | |
| CN216108006U (en) | Full-prefabricated assembled hidden cover beam and beam bridge thereof | |
| CN218643411U (en) | Tower crane foundation structure arranged in bridge median zone | |
| CN114369994B (en) | Fully-prefabricated small box girder type invisible bent cap structure system and construction method thereof | |
| CN216765865U (en) | A prestressing force tubular pile cushion cap structure for soft soil foundation | |
| CN113652967B (en) | Fully-prefabricated assembly type concrete beam type bridge structure system and construction method thereof | |
| CN218405383U (en) | Prefabricated pile core structure of assembled high-pile wharf | |
| CN214530228U (en) | Beam storage bench seat shared by prefabricated box beams | |
| CN220927513U (en) | Novel ripple coincide bridge floor structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |