CN107338734B - Prefabricated jacking construction method for prefabricated temporary girder buttress - Google Patents
Prefabricated jacking construction method for prefabricated temporary girder buttress Download PDFInfo
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- CN107338734B CN107338734B CN201710752218.6A CN201710752218A CN107338734B CN 107338734 B CN107338734 B CN 107338734B CN 201710752218 A CN201710752218 A CN 201710752218A CN 107338734 B CN107338734 B CN 107338734B
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- prefabricated
- bearing platform
- supporting beam
- mortise
- hole
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
Abstract
The invention particularly relates to a prefabricated jacking construction method of a prefabricated temporary beam buttress, which is characterized by comprising the following steps of: the bearing platform is located above the pile foundation, a mortise is arranged at the top of the bearing platform, the supporting beam is arranged above the bearing platform in a jacking mode, a through hole corresponding to the mortise is formed in the supporting beam, and the mortise and the through hole are connected through poured concrete to enable the bearing platform and the supporting beam to be integrated. The invention has the advantages that: the railway lower construction period is shortened, risks are reduced, applicability is strong, and cost is low.
Description
Technical Field
The invention relates to the field of design and construction of underpass railway overpasses, in particular to a prefabricated jacking construction method of a prefabricated temporary girder buttress.
Background
The underpass railway overpass is usually constructed by adopting a jacking method of a prefabricated box body in a foundation pit, however, the jacking box body needs to be erected with an auxiliary beam to ensure the normal operation of a railway, the auxiliary beam is erected on an auxiliary beam buttress, the auxiliary beam buttress is usually constructed by erecting the auxiliary beam, excavating and drawing a groove under a line, constructing a high-pressure jet grouting pile and pouring a concrete strip foundation, and the construction process is very complicated. In order to save cost, shorten the construction period below the railway and reduce risks, a new construction process is needed.
Disclosure of Invention
The invention aims to provide a prefabricated jacking construction method of a prefabricated beam buttress, which is characterized in that a prefabricated support beam is jacked into a bearing platform, and a through hole and a mortise on the support beam are connected by cast concrete at present, so that the support beam and the bearing platform form an integral structure.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a prefabricated just roof beam buttress, just roof beam buttress includes pile foundation, cushion cap and supporting beam, its characterized in that: the bearing platform is located above the pile foundation, a mortise is arranged at the top of the bearing platform, the supporting beam is arranged above the bearing platform in a jacking mode, a through hole corresponding to the mortise is formed in the supporting beam, and the mortise and the through hole are connected through poured concrete to enable the bearing platform and the supporting beam to be integrated.
The supporting beam is a prefabricated beam with a hollow structure inside, holes are respectively formed in a top plate of the supporting beam and a bottom plate of the supporting beam, and the holes penetrate through the hollow structure to form the through holes.
And head sealing plates are arranged in the hollow structure of the precast beam, and the positions of the head sealing plates are positioned on two sides of the position of the opening.
The mortise depth is 0.5m.
The construction method at least comprises the following steps: a) Constructing the pile foundation and the bearing platform on two sides of the railway roadbed, and reserving mortises on the tops of the bearing platforms; b) The supporting beam with a hollow structure inside is prefabricated, and holes are formed in a top plate and a bottom plate of the supporting beam and are communicated with the hollow structure to form a through hole; c) And jacking the supporting beam onto the bearing platform until the through hole in the supporting beam is aligned with the mortise in the bearing platform, binding steel bars at the positions of the mortise and the through hole, arranging the head plates in the hollow structure, positioning the head plates at two sides of the hole opening position, and then casting concrete to enable the supporting beam and the bearing platform to be connected into an integral structure.
The supporting beam is in a rectangular shape of reinforced concrete.
The invention has the advantages that:
1. compared with a cast-in-place concrete strip foundation below a railway, the high-pressure jet grouting pile is not needed for foundation reinforcement, the construction period is shortened, and the operation influence on the railway is reduced;
2. compared with a cast-in-place concrete strip foundation below a railway, the construction does not need to erect an auxiliary beam;
3. the construction risk below the railway is reduced, and the stability of the convenient beam buttress is ensured;
4. the design and construction of the lower-crossing overpass temporary beam buttress have great popularization and application prospects, and particularly under the condition that the existing railway subgrade is poor in geology, the application competitive advantage is more obvious.
Drawings
FIG. 1 is a schematic view of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1, reference numerals 1 to 9 in the drawing denote: the pile foundation comprises a pile foundation 1, a bearing platform 2, a supporting beam 3, a mortise 4, a through hole 5, a hollow structure 6, a head sealing plate 7, a steel bar 8 and concrete 9.
The embodiment is as follows: as shown in fig. 1, the prefabricated temporary beam pier in the embodiment is used for constructing an overpass for passing a railway downwards, and is composed of a pile foundation 1, a pile cap 2 and a support beam 3, wherein the support beam 3 is a prefabricated beam. The bearing platform 2 is supported above the pile foundation 1, and the top of the bearing platform 2 is provided with a mortise 4. A supporting beam 3 is prefabricated in a foundation pit, the supporting beam 3 is a hollow structure 6 with a rectangular inner part of reinforced concrete, holes are formed in a top plate and a bottom plate of the end parts of two sides of the supporting beam 3, the holes penetrate through the hollow structure 6, and a through hole 5 is formed in the supporting beam 3. The position of the opening in the support beam 3 depends on the position of the mortises 4 in the bearing platform 2, i.e. it is ensured that the distance between the through holes 5 provided at the end portions on both sides of the support beam 3 is the same as the distance between the mortises 4 provided in the two bearing platforms 2. And end sealing plates 7 are arranged in the hollow structure 6, the end sealing plates 7 are positioned at two sides of the hole opening position, and the distance between the end sealing plates 7 at the two sides is larger than the diameter of the through hole 5, so that the end sealing plates 7 at the two sides and the through hole 5 form a crisscross space.
As shown in fig. 1, steel bars 8 are bound inside the mortises 4 and the through holes 5, concrete 9 is poured in situ, the mortises 4 and the through holes 5 are connected and fixed through shear keys formed by pouring the concrete 9, and the bearing platform 2 and the supporting beam 3 are integrated. The gap between the head plates 7 on both sides of the through hole 5 and the through hole 5 is also filled with concrete, so that the connection between the support beam 3 and the bearing platform 2 is more secure, and particularly the relative movement in the vertical direction of the two is restrained.
The construction in the embodiment specifically comprises the following steps:
a) And constructing a pile foundation 1 and a bearing platform 2 on two sides of the railway roadbed, wherein the bearing platform 2 is supported by the pile foundation 1. Mortises 6 are reserved on the top surfaces of two sides of the bearing platform 2, and the hole depth of each mortice 6 is 0.5m.
b) And prefabricating a supporting beam 3 with a hollow structure 6 inside, wherein holes are formed in a top plate and a bottom plate of the supporting beam 3 and penetrate through the hollow structure 6 to form a through hole 5.
c) And jacking the support beam 3 onto the bearing platform 2 until the through hole 5 in the support beam 3 is aligned with the mortise 4 in the bearing platform 2, binding steel bars 8 at the positions of the mortise 4 and the through hole 5, arranging head plates 7 in the hollow structure 6, positioning the head plates 7 at two sides of the hole opening position, and then casting concrete 9 to enable the support beam 3 and the bearing platform 2 to be connected into an integral structure.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.
Claims (3)
1. A prefabricated roof construction method for a prefabricated beam buttress is characterized by comprising the following steps: the construction method at least comprises the following steps: a) Constructing a pile foundation and a bearing platform on two sides of a railway roadbed, wherein the bearing platform is positioned above the pile foundation, and a mortise is reserved at the top of the bearing platform; b) The supporting beam with a hollow structure inside is prefabricated, and holes are formed in a top plate and a bottom plate of the supporting beam and are communicated with the hollow structure to form a through hole; c) And jacking the supporting beam onto the bearing platform until the through hole in the supporting beam is aligned with the mortise in the bearing platform, binding steel bars at the positions of the mortise and the through hole, arranging head plates in the hollow structure, wherein the positions of the head plates are positioned at two sides of the hole opening position, and then casting concrete to enable the supporting beam and the bearing platform to be connected into an integral structure.
2. The prefabricated roof construction method of the prefabricated temporary beam buttress according to claim 1, characterized in that: the mortise depth is 0.5m.
3. The prefabricated roof construction method of the prefabricated temporary beam buttress according to claim 1, characterized in that: the supporting beam is in a rectangular shape of reinforced concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710752218.6A CN107338734B (en) | 2017-08-28 | 2017-08-28 | Prefabricated jacking construction method for prefabricated temporary girder buttress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710752218.6A CN107338734B (en) | 2017-08-28 | 2017-08-28 | Prefabricated jacking construction method for prefabricated temporary girder buttress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107338734A CN107338734A (en) | 2017-11-10 |
| CN107338734B true CN107338734B (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710752218.6A Active CN107338734B (en) | 2017-08-28 | 2017-08-28 | Prefabricated jacking construction method for prefabricated temporary girder buttress |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108755730A (en) * | 2018-06-12 | 2018-11-06 | 中交第三航务工程勘察设计院有限公司 | A kind of assembled pile foundation wharfs node and its construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007197975A (en) * | 2006-01-25 | 2007-08-09 | Taisei Corp | Structure and method for connecting pile head part and precast girder together |
| CN101838968A (en) * | 2010-05-19 | 2010-09-22 | 中铁二十局集团有限公司 | Double track bridge construction process crossing existing railway operational lines |
| CN102817329A (en) * | 2012-09-07 | 2012-12-12 | 中铁二十五局集团第二工程有限公司 | Process for erecting construction auxiliary girder on existing railway |
| CN204825679U (en) * | 2015-07-29 | 2015-12-02 | 胡仲春 | A support stake for construction is contained to indisputable road bridge |
| CN207109611U (en) * | 2017-08-28 | 2018-03-16 | 中铁上海设计院集团有限公司 | A kind of prefabricated just beam buttress |
-
2017
- 2017-08-28 CN CN201710752218.6A patent/CN107338734B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007197975A (en) * | 2006-01-25 | 2007-08-09 | Taisei Corp | Structure and method for connecting pile head part and precast girder together |
| CN101838968A (en) * | 2010-05-19 | 2010-09-22 | 中铁二十局集团有限公司 | Double track bridge construction process crossing existing railway operational lines |
| CN102817329A (en) * | 2012-09-07 | 2012-12-12 | 中铁二十五局集团第二工程有限公司 | Process for erecting construction auxiliary girder on existing railway |
| CN204825679U (en) * | 2015-07-29 | 2015-12-02 | 胡仲春 | A support stake for construction is contained to indisputable road bridge |
| CN207109611U (en) * | 2017-08-28 | 2018-03-16 | 中铁上海设计院集团有限公司 | A kind of prefabricated just beam buttress |
Non-Patent Citations (1)
| Title |
|---|
| 浅埋大跨径软土地层公路隧道下穿既有铁路车站路基施工技术;赵立财;《现代隧道技术》;20141231;第160-166页 * |
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| CN107338734A (en) | 2017-11-10 |
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