CN114658003A - Railway high-low staggered platform reinforcing system and construction method - Google Patents
Railway high-low staggered platform reinforcing system and construction method Download PDFInfo
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- CN114658003A CN114658003A CN202210365184.6A CN202210365184A CN114658003A CN 114658003 A CN114658003 A CN 114658003A CN 202210365184 A CN202210365184 A CN 202210365184A CN 114658003 A CN114658003 A CN 114658003A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
Abstract
The embodiment of the application provides a railway high-low slab staggering reinforcing system which is used for reinforcing railway high-low slab staggering; comprises a reinforcing support and a tie beam; the reinforcing support is arranged at the top of the supporting pile forming the high-low staggered platform; the device is used for reinforcing and connecting the staggered platforms of the support piles and the temporary beam; a tie beam extending in a direction perpendicular to a railway line direction; the tie beam is annularly enclosed between the supporting pile tops on two sides of the railway line; the embodiment of the application provides a construction method of a railway high-low slab staggering reinforcing system, and solves the problem that concrete at the pile top of a support pile is prone to cracking under open cut conditions, and operation safety of a railway is guaranteed.
Description
Technical Field
The application relates to a construction technology of a tunnel penetrating under an existing railway, in particular to a railway high-low staggered platform reinforcing system and a construction method.
Background
In the construction process of passing the existing railway under the tunnel, in order to ensure the safe operation of the railway, a system of 'temporary beam + supporting pile' is usually adopted for reinforcing the railway. If it is longer along the required reinforcement length of railway direction, when needing two sets of even multiunit just can satisfy the reinforcement length requirement, will appear bearing the condition of two sets of just roof beams on one supports the stake, if support stake both sides just roof beam type number inconsistent, when the just roof beam of different models is located same support stake, because of two kinds of just roof beam size differences, for guaranteeing that the former track elevation of existing railway is unchangeable, the height dislocation condition can appear in support pile bolck.
For jacking construction or underground excavation tunnel construction, because foundation pit excavation is not needed, the high-low staggered platform part of the supporting pile top is positioned in soil, annular restraint exists, and special treatment is not generally needed. However, under the working condition that the open trench tunnel penetrates through the existing railway, the upper railway train passes through or temporarily stops to apply load to the existing railway, the pile tops of the supporting piles are stressed unevenly, so that the supporting piles are cracked in concrete, offset and dislocated in the upper temporary beam, and the like, and great potential safety hazards are caused to railway operation.
In view of this, the present application is specifically proposed.
Disclosure of Invention
In order to solve one of the technical defects, the embodiment of the application provides a railway high-low slab staggering reinforcement system and a construction method.
According to a first aspect of the embodiments of the present application, a railway high-low slab staggering reinforcing system is provided, which is used for reinforcing a railway high-low slab staggering; comprises a reinforcing support and a tie beam;
the reinforcing support is arranged at the top of the supporting pile forming the high-low staggered platform and used for reinforcing and connecting the high-low staggered platform of the supporting pile with the temporary beam;
a tie beam extending in a direction perpendicular to the railway line direction; the tie beam is annularly enclosed between the supporting pile tops on two sides of the railway line.
According to a second aspect of the embodiment of the application, a railway high-low slab staggering reinforcement construction method is provided, and comprises the following specific steps:
constructing a reinforcing support, namely installing the reinforcing support between the temporary beam and the support pile;
excavating a soil body below the railway line to form a foundation pit; the foundation pit is positioned in an area surrounded by the supporting piles;
and (4) performing tie beam construction, namely constructing tie beams around the support piles, wherein the extension direction of the tie beams is vertical to the railway line direction.
By adopting the railway high-low staggered platform reinforcing system and the construction method provided by the embodiment of the application, the following beneficial effects are achieved:
according to the technical scheme provided by the embodiment of the application, the reinforcing support is arranged at the top of the supporting pile forming the high-low staggered platform and used for reinforcing and connecting the high-low staggered platform of the supporting pile with the temporary beam; a tie beam is annularly arranged on the top of the support pile in a surrounding manner, the extension direction of the tie beam is vertical to the railway line direction, and the annular restraint of a reinforcing support and the support pile is increased for reinforcing the staggered platform positions of the support pile; under open cut construction conditions, the problem that supporting pile top concrete is prone to cracking is solved, and operation safety of the existing railway is guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a top view of a railway high-low slab staggering reinforcement system provided by an embodiment of the application;
FIG. 2 is an elevation view of a railway high-low slab staggering reinforcement system provided by an embodiment of the application;
FIG. 3 is a cross-sectional view of a railway high-low slab staggering reinforcement system provided by an embodiment of the application;
FIG. 4 is a top view of a reinforcing mount;
FIG. 5 is an elevational view of the reinforcing support;
fig. 6 is a flowchart of a construction method of the railway high-low slab staggering reinforcement system provided in this embodiment.
Wherein:
1-a stool beam; 101-D16 bridge; 102-D24 bridge; 2-tie beam; 3-supporting the pile; 4-reinforcing the support; 401-reinforcement plates; 402-connecting ribs; 5-a limiting device.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Fig. 1 is a top view of a railway high-low slab staggering reinforcement system provided by an embodiment of the present application, fig. 2 is an elevation view of the railway high-low slab staggering reinforcement system provided by the embodiment of the present application, fig. 3 is a cross-sectional view of the railway high-low slab staggering reinforcement system provided by the embodiment of the present application, fig. 4 is a top view of a reinforcement support, and fig. 5 is an elevation view of the reinforcement support, as shown in fig. 1 to 5, the embodiment provides a railway high-low slab staggering reinforcement system for reinforcing a railway high-low slab staggering before open cut foundation pit construction is performed below a railway line 1 shown in fig. 1.
The reinforcing system provided by the embodiment of the application is used for reinforcing high-low staggered platforms of a railway; comprises a tie beam 2 and a reinforcing support 4; as shown in fig. 3, the reinforcing support 4 is installed on the top of the support pile 3 forming the high-low staggered platform and used for reinforcing and connecting the high-low staggered platform of the support pile 3 with the temporary beam 1; the tie beam 2 is annularly surrounded on the top of the supporting pile 3, the extending direction of the tie beam is vertical to the railway line direction, and the hoop restraint of the reinforcing support 4 and the supporting pile 3 is increased for reinforcing the high-low slab staggering position of the supporting pile 3.
In the implementation, the reinforcing support 4 is used for reinforcing and connecting the high-low staggered platform of the supporting pile 3 with the temporary beam 1; the top of the supporting pile 3 is annularly provided with a tie beam 2, and the hoop restraint of a reinforcing support 4 and the supporting pile 3 is increased for reinforcing the staggered position of the supporting pile 3; under open cut construction conditions, the problem that concrete at the top of the 3 supporting piles is easy to crack is solved, and the operation safety of the existing railway is ensured.
As an embodiment of the present application, the utility model further comprises a support pile 3 and a temporary beam group; the temporary beam group comprises a plurality of groups of temporary beams 1 which are sequentially connected and have the same extending direction with the railway line; is arranged on the top of each supporting pile 3 and is used for supporting the railway track; the supporting piles 3 are vertically arranged in soil layers at two sides of the railway line and are used for supporting the temporary beam group; wherein, the connection positions of the temporary beams 1 of different types form high-low staggered platforms at the tops of the support piles 3.
The extension direction of the temporary beam group is the same as that of the railway line; is arranged on the top of each supporting pile 3 and is used for supporting the railway track; the supporting piles 3 are vertically arranged in soil layers at two sides of the railway line and are used for supporting the temporary beam set; the reinforcing bearing 4 is mounted on the top of the supporting pile forming the high-low staggered platform.
The support piles 3 may be formed in various ways, such as in the form of a casing, or in the form of cast-in-place concrete and a mud retaining wall. The model of the temporary beam 1 suitable for the rail is also many, and the temporary beams 1 with different sizes and models are selected according to different load bearing requirements; because of the different sizes of the temporary beam 1, the pile top of the supporting pile 3 can be staggered in height in order to ensure that the original track elevation of the existing railway line is unchanged.
The supporting pile 3 of the present embodiment is exemplified by a method of casting concrete in situ and using a slurry retaining wall, and the reinforcing system will be described in detail by taking D16 as an example of connecting the beam 101 with the beam 102 of D24 as an example of the beam 1.
As shown in fig. 2, the technical solution provided by this embodiment is mainly used for special treatment of the existing railway temporary beam reinforcement system in the case of high-low slab staggering occurring at the top of the support pile 3. The extension direction of the temporary beam group is the same as that of the railway line; mounted on the top of each support pile 3 for supporting a railway track; the supporting piles 3 are vertically arranged in soil layers at two sides of the railway line and are used for supporting the temporary beam set; the top of the support pile 3 forming the high-low staggered platform is provided with a reinforcing support 4 for reinforcing and connecting the high-low staggered platform of the support pile 3 with the temporary beam; establish tie beam 2 to enclosing at 3 tops of support pile, tie beam 2 extending direction is perpendicular with the railway line direction, increases 4 hoop restraints of reinforcing support and optimizes the bearing load who supports pile 3 simultaneously for 3 high low staggered platform positions departments of support pile reinforce, reduce the risk that supports 3 pile tops concrete fracture.
As shown in fig. 3, reinforcing support seats with different sizes are manufactured according to the height of the high-low staggered platform of the support pile 3, and the height difference between the lower edges of the beams 101 and 102 of the D16 and the D24 of the embodiment is H; the reinforcing support 4 is arranged below the temporary beam 1 on the high side of the high-low staggered platform of the support pile 3, the distance between the temporary beam 101 and the connecting position of two adjacent temporary beams 1 is more than or equal to 10cm under the D16, and the connecting position of the two adjacent temporary beams 1 is as follows: d16 is the connection between beam 101 and D24 is the connection between beam 102.
As an embodiment of the application, the soil body below the existing railway which is reinforced by the temporary beam 1 is excavated to the position 2m below the pile top of the high-side staggered platform of the support pile 3, and the disturbance to the surrounding soil body is avoided by adopting manual excavation.
And (4) manufacturing a reinforced support 4 by combining the width of the temporary beam 1 and the height difference H of the pile top of the railway line support pile 3.
As shown in fig. 4-5, as an embodiment of the present application, the reinforcing support 4 includes two reinforcing plates 401 and a plurality of connecting ribs 402 uniformly distributed; wherein, the connecting ribs 402 are arranged in parallel and extend along the vertical direction of the support pile 3; two ends of the connecting rib 402 are respectively and vertically connected with the reinforcing plate 401; the reinforcing plates 401 are square reinforcing plates, the side length of one side of each square reinforcing plate is equal to the width of the temporary beam 1, and the distance between the two reinforcing plates 401 is equal to the height difference H of the support piles 3. The reinforcing plate 401 is made of a high-strength material, for example, the reinforcing plate 401 is made of a steel plate, and the connecting rib 402 is made of a steel bar.
As a specific embodiment of the application, the reinforcing support 4 is formed by welding 5 phi 28 steel bars and two steel plates with the side length of D16 and the width of the beam 101; is arranged below the high side temporary beam 1, namely the D16 temporary beam 101 of the high-low staggered platform of the supporting pile 3.
As an embodiment of the application, an L-shaped notch is formed above the tie beam 2 and at the position of the pile top staggered in height of the supporting pile 3; as shown in fig. 3, the support piles 3 are circular in cross section; the tie beam 2 of L type and 3 top height dislocation position profile modeling of support stake are consolidated supporting 3 top height dislocation, increase the condition of optimizing the bearing load of supporting 3 when consolidating 4 hoop constraints of support, reduce the risk that supports 3 pile bolck concrete fracture. The distance between the two ends of the tie beam 2 in the length direction and the adjacent support piles 3 is equal, and the distance between the two ends of the tie beam 2 in the width direction and the support piles 3 is equal.
As an embodiment of the application, the tie beam 2 is an L-shaped reinforced concrete tie beam, and the high-low staggered position and the reinforcing support 4 of the support pile 3 are wrapped inside; the support pile comprises a plurality of stirrups annularly arranged around a support pile 3, and the stirrups are uniformly arranged at intervals along the length direction of the support pile 3; concrete is poured in the area covered by the tie beam 2. The lower edge of the tie beam 2 is located at a first preset distance D1 from the high side of the high-low dislocation of the support piles 3 to the lower side, and the distance between the lower edge of the tie beam 2 and the top surface of the low side of the high-low dislocation of the support piles 3 is a second preset distance D1, wherein D2 is D1-H, and H is the height difference of the high-low dislocation of the support piles 3.
As a specific example of the present application, the tie beam 2 is made of C30 early strength concrete, the distance between the two ends of the tie beam 2 in the width direction and the support pile 3 is equal, the distance between the two ends of the tie beam and the retaining wall of the support pile 3 is set to be 50cm, the width of the tie beam 2 is 2.8m, and the height of the tie beam is 2 m; wherein the diameter of the support pile 3 is 1.5m, and the protective wall of the support pile 3 is 15-30 cm; the height from the bottom of the tie beam 2 to the high-side pile top of the high-low staggered platform of the support pile 3 is 2m, and the height from the bottom of the high-low staggered platform of the support pile 3 is (2-H) m, wherein the high-side pile top of the high-low staggered platform of the support pile 3 is tightly attached to the bottom surface of the beam 101 of the D16 stool, and the low-side pile top of the high-low staggered platform of the support pile 3 is tightly attached to the bottom surface of the beam 102 of the D24 stool.
After the L-shaped reinforced concrete tie beam is poured and reaches the designed strength, the displacement and settlement of the supporting pile 3 and the railway line position are monitored. And carrying out subsequent open cut construction under the condition of ensuring the railway operation safety, and strengthening monitoring in the subsequent construction process.
In addition, in order to ensure the operation safety of the railway, limit the displacement of the track and prevent the upper temporary beam 1 from deviating due to the deformation of the staggered positions of the support piles 3, a limiting device 5 is arranged outside each group of support piles 3 vertical to the extension direction of the railway line and clings to the outer edge of the temporary beam 1, so that the relative displacement between the temporary beam 1 and the support piles 3 is avoided.
As an embodiment of the present application, the limiting device 5 includes a plurality of limiting main ribs 501, and the limiting main ribs 501 are fixed on the supporting pile 3 by means of bar planting, wherein the limiting main ribs 501 are higher than the supporting pile by a third preset distance from the high side of the staggered platform; as a specific embodiment of the application, the limiting device 5 adopts phi 28 steel bars, 3 steel bars are respectively arranged on each side of the high side and the low side of the staggered platform at the top of the supporting pile 3 in a manner of planting the steel bars.
Fig. 6 is a flowchart of a construction method of the railway high-low slab staggering reinforcement system provided in this embodiment. As shown in fig. 6, the reinforcing support 4 may be pre-embedded during the process of pouring the support pile 3 in the early stage, or may be placed in the later stage.
According to the embodiment of the application, the reinforcing support 4 is embedded in the early pouring process of the support pile 3, and the construction method of the railway high-low staggered platform reinforcing system comprises the following steps:
step S1: manufacturing a reinforced support 4;
as a specific embodiment, the reinforcing support 4 is a steel support, and is manufactured by welding two square steel plates and five continuous steel bars with the steel bars;
step S2: constructing support piles 3, constructing the support piles 3 on two sides of each railway line, and vertically inserting the support piles 3 into soil layers on two sides of each railway line; the reinforcing support 4 is embedded when the support pile 3 is poured;
step S3: constructing a temporary beam 1, constructing the temporary beam 1 on each railway line, arranging the temporary beam 1 on the top of each support pile 3, and extending the temporary beam 1 along the railway line direction;
step S4: excavating a soil body below the railway line to form a foundation pit; the foundation pit is positioned in the area surrounded by the support piles 3;
step S5: performing tie beam construction, namely constructing tie beams 2 around the support piles 3, wherein the extension direction of the tie beams 2 is vertical to the railway line direction;
as a specific embodiment, a foundation pit is excavated to a position 2m below the top of a high-side pile of a support pile 3 with staggered height, a retaining wall within the range of 2m below the top of the high-side pile of the support pile 3 with staggered height is chiseled, and the support pile 3 is properly chiseled, wherein the excavation of the foundation pit, the chiseling of the retaining wall and the chiseling of the pile need to be performed manually, so that disturbance to the surrounding soil body and the support pile body is avoided, and the construction of binding reinforcing steel bars, supporting molds and casting concrete in situ is completed.
As an embodiment of the present application, the reinforcing support 4 is placed after the construction of the temporary beam 1 is completed, and after the construction of the temporary beam + supporting pile reinforcing system is completed, the specific method for placing the reinforcing support 4 at this time is as follows: the temporary support of the high-side temporary beam 1 of the high-low staggered platform of the support pile 3, such as the D16 temporary beam 101 of the embodiment, is realized by using a support member, such as a wood sleeper, so that the normal work of the D16 temporary beam 101 is ensured; chiseling concrete at the position of the support pile 3 with staggered height, and placing the reinforcing support 4; then repeating the steps S4-S5 to complete the reinforcement;
when the reinforcing support 4 is constructed by a post-installation method, the temporary support of the support member must be removed after the tie beam 2 reaches the designed strength.
As an embodiment of the application, in order to prevent the deflection of the upper temporary beam caused by the deformation of the high-low staggered platform position of the support pile 3, complete the construction of the tie beam 2 and carry out the construction of the limiting device 5 after the acceptance, the limiting devices 5 are arranged at the high-low staggered platform positions of the support pile 3 and are tightly attached to the outer side edges of the high-side temporary beam 1 and the low-side temporary beam 1; for example, the limiting device adopts phi 28 steel bars, 3 steel bars are arranged on each side of the high side and the low side of the staggered platform at the top of the 3 piles of the supporting piles in a manner of planting the steel bars.
This application is under the open cut construction condition, 3 height staggered platform departments at the support pile add the stop device 5 that consolidates support 4 and support, tie beam 2 restraint and just roof beam 1, can prevent effectively and wear the emergence of 3 pile bolck concrete cracking phenomena of operation railway construction in just roof beam height platform support pile down, ensure the operation safety of railway.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (13)
1. A railway high-low slab staggering reinforcement system is characterized by being used for reinforcing railway high-low slab staggering; comprises a reinforcing support and a tie beam;
the reinforcing support is arranged at the top of the supporting pile forming the high-low staggered platform and used for reinforcing and connecting the high-low staggered platform and the temporary beam;
a tie beam extending in a direction perpendicular to the railway line direction; the tie beam is annularly enclosed between the supporting pile tops on two sides of the railway line.
2. The railway high-low slab staggering reinforcement system according to claim 1, further comprising:
the supporting piles are vertically installed in soil layers on two sides of the railway line;
the temporary beam group comprises a plurality of groups of temporary beams which are sequentially connected, and the temporary beams are arranged at the tops of the supporting piles and have the same extending direction with the railway line; the joints of the temporary beams of different types are positioned at the top of the support pile to form high-low staggered platforms; the reinforcing support is positioned between the bottom of the high-side beam and the support pile.
3. The railway high-low slab staggering reinforcement system according to claim 1, wherein the reinforcement support comprises two reinforcement plates and a plurality of uniformly distributed connecting ribs;
the connecting ribs extend along the vertical direction of the support piles;
and the reinforcing plates are vertically connected to two ends of the connecting ribs, and the distance between the reinforcing plates is equal to the height difference of the staggered platforms of the supporting piles.
4. The railway high-low slab staggering reinforcement system according to claim 2, wherein the cross section of the support piles is circular; the distance between the two ends of the tie beam along the length direction and the adjacent support piles is equal, and the distance between the two ends of the tie beam along the width direction and the support piles is equal.
5. The railway high-low slab staggering reinforcement system of claim 4, wherein the lower edge of said tie beam is located at a first preset distance D1 below the high side of the support pile high-low slab staggering, and the distance between the lower edge of said tie beam and the top surface of the low side of the support pile high-low slab staggering is a second preset distance D2, wherein D2 is D1-H, and H is the height difference of the support pile high-low slab staggering.
6. The railway high-low slab staggering reinforcement system according to claim 4, wherein the tie beam comprises a plurality of stirrups annularly arranged around the support piles, and the stirrups are uniformly spaced along the length direction of the support piles; concrete is poured in the area covered by the tie beam.
7. The railway high-low slab staggering reinforcement system according to claim 2, further comprising:
and the limiting device is positioned at the high-low dislocation position of the supporting pile, is tightly attached to the outer edges of the high-side temporary beam and the low-side temporary beam and is used for preventing the temporary beam from deviating due to deformation at the high-low dislocation position.
8. The railway high-low slab staggering reinforcement system according to claim 7, wherein the limiting device comprises a plurality of limiting main bars, the limiting main bars are fixed on the supporting piles in a bar planting mode, and the limiting main bars are higher than the high sides of the high-low slab staggering of the supporting piles by a third preset distance.
9. The railway high-low slab staggering reinforcement construction method is characterized in that the railway high-low slab staggering reinforcement system according to any one of claims 1 to 8 is adopted, and the method comprises the following specific steps:
and (3) reinforcing the support construction: installing a reinforcing support between the temporary beam and the support pile;
excavating a soil body below the railway line to form a foundation pit; the foundation pit is positioned in the area surrounded by the support piles;
and (3) beam tying construction: and constructing a tie beam around the support pile, wherein the extension direction of the tie beam is vertical to the railway line direction.
10. The railway high-low slab staggering reinforcement construction method according to claim 9, before the construction of the reinforcement support, the concrete steps of:
manufacturing a reinforced support;
and (3) support pile construction: constructing support piles at two sides of each railway line, wherein the support piles are vertically inserted into soil layers at two sides of the railway line;
and (3) beam construction: temporary girders are constructed on each railway line, the temporary girders are arranged on the tops of the support piles, and the temporary girders extend in the direction of the railway line.
11. The railway high-low staggered platform reinforcing construction method according to claim 9, wherein the step of installing the reinforcing support between the temporary beam and the supporting pile comprises the following specific steps:
the reinforcing support is embedded when the support pile is poured; or the following mode is adopted:
the support member is used as a temporary support for supporting the high-side temporary beam of the pile high-low staggered platform, so that the normal work of the temporary beam is ensured; and chiseling concrete at the position of the support pile staggered in height, and placing the reinforcing support into the pile.
12. The railway high-low staggered platform reinforcing construction method according to claim 9, wherein the tie beam construction method comprises the following steps:
the method comprises the steps of excavating a foundation pit to a first preset distance position below a high-side pile top of a support pile with staggered high and low platforms, chiseling a retaining wall within a first preset distance range below the high-side pile top of the support pile with staggered high and low platforms, properly chiseling a support pile body, binding reinforcing steel bars, supporting a formwork, and performing cast-in-place concrete construction to complete tie beam construction.
13. The railway high-low staggered platform reinforcing construction method according to claim 12, further comprising:
and (3) constructing a limiting device: and the limiting devices are closely attached to the outer edges of the high-side temporary beam and the low-side temporary beam at the staggered positions of the support piles.
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| CN202210365184.6A CN114658003B (en) | 2022-04-08 | 2022-04-08 | Railway high-low staggered platform reinforcing system and construction method |
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| CN202210365184.6A CN114658003B (en) | 2022-04-08 | 2022-04-08 | Railway high-low staggered platform reinforcing system and construction method |
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| CN203729330U (en) * | 2013-12-26 | 2014-07-23 | 中铁四局集团第五工程有限公司 | Positioning frame of subway station section steel column formed through cover and cut-top down method |
| CN204590042U (en) * | 2015-04-27 | 2015-08-26 | 浙江大学城市学院 | A kind of deep-sea tunnel boring stake space enclosing structure |
| CN108487089A (en) * | 2018-04-03 | 2018-09-04 | 锦州铁道勘察设计院有限公司 | A method of railroad bridge is removed and set up on hillside |
| CN110512474A (en) * | 2019-09-12 | 2019-11-29 | 中铁二局第二工程有限公司 | A kind of railroad track makes somebody a mere figurehead ruggedized construction and method |
| CN111236040A (en) * | 2020-01-08 | 2020-06-05 | 中铁二院工程集团有限责任公司 | D-shaped temporary beam erecting method for underneath passing through railway frame bridge type tunnel |
| CN111576479A (en) * | 2020-05-06 | 2020-08-25 | 中铁第四勘察设计院集团有限公司 | Retaining structure of filling slope and construction method |
| CN112502042A (en) * | 2020-10-27 | 2021-03-16 | 中建三局基础设施建设投资有限公司 | Construction method for improving jacking efficiency of large frame bridge |
| CN113833022A (en) * | 2021-09-30 | 2021-12-24 | 中铁第五勘察设计院集团有限公司 | Railway line reinforcing system and construction method |
| CN113832947A (en) * | 2021-11-05 | 2021-12-24 | 中铁第六勘察设计院集团有限公司 | Device and method for reinforcing multiple-track railway with small space passing under shield tunnel |
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