CN115839045B - Roadbed differential settlement deformation region remediation process and frozen soil remediation roadbed structure - Google Patents
Roadbed differential settlement deformation region remediation process and frozen soil remediation roadbed structure Download PDFInfo
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- CN115839045B CN115839045B CN202211612867.3A CN202211612867A CN115839045B CN 115839045 B CN115839045 B CN 115839045B CN 202211612867 A CN202211612867 A CN 202211612867A CN 115839045 B CN115839045 B CN 115839045B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The embodiment of the application discloses a roadbed differential settlement deformation region remediation process and a frozen soil remediation roadbed structure, wherein the roadbed differential settlement deformation region remediation process comprises the steps of constructing underpinning foundation piles in a differential settlement region to be remediated; a joist is arranged on the underpinning foundation pile; arranging sleeper underpinning pieces on the joists to form an overhead replacement bracket; the periphery of the overhead replacement bracket is filled with the replacement filler, based on the embodiment of the application, the uneven settlement disease characteristics of the bridge head roadbed in the permafrost area are combined, the bracket underpinning mode is adopted, the existing track is overhead, the roadbed filler is replaced, the safety and uninterrupted operation of a train can be ensured, and the replacement engineering of the roadbed filler can be completed.
Description
Technical Field
The embodiment of the application relates to the technical field of rail transit, in particular to a roadbed uneven settlement deformation area remediation process and a frozen soil remediation roadbed structure.
Background
In permafrost areas, the stability of roadbed engineering mainly depends on the thermal stability of permafrost of a foundation, and the thermal stability of the permafrost depends on the geological environment where the permafrost occurs and is also influenced by engineering structural characteristics. Therefore, as the Qinghai-Tibet railway of the first high-altitude railway trunk line in the world, experience and training of insufficient knowledge of the Qinghai-Tibet road and the northeast permafrost railway on the permafrost are fully absorbed in the construction of the permafrost region, a series of new permafrost protection measures are adopted, and a good operation effect is obtained in the early stage. However, with the acceleration of global warming trend and the disturbance of long-term dynamic load, the occurrence environment of permafrost of the foundation changes, so that the phenomenon of sinking of the bridge head roadbed in the permafrost region is common.
The bridge abutment is a load-bearing structure for directly supporting the bridge superstructure, and is a joint body for connecting the bridge and the embankment body, and plays a very important role in the bridge structure. Sinking of the bridge head roadbed often appears uneven deformation, namely, outside the vertical compression deformation, transverse uneven deformation occurs due to the difference of the thawing degree of permafrost on the yin and yang sides of the embankment, meanwhile, the bridge head roadbed is influenced by high-cold weather characteristics, accumulated water at the back of the bridge head roadbed is gathered in warm seasons, frost heaving occurs in cold seasons, and the bridge abutment is inclined due to strong tangential frost heaving force and normal frost heaving force, so that safe operation of rail transit is influenced.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the present application provides a process for repairing a non-uniform settlement deformation zone of a roadbed.
The second aspect of the application provides a frozen soil remediation roadbed structure.
In view of this, according to a first aspect of the embodiments of the present application, a process for repairing a non-uniform settlement deformation region of a roadbed is provided, including:
building underpinning foundation piles in the non-uniform settlement area to be remedied;
a joist is arranged on the underpinning foundation pile;
arranging sleeper underpinning pieces on the joists to form overhead replacement brackets;
and filling replacement filler on the periphery of the overhead replacement bracket.
In a possible embodiment, before the step of constructing underpinning foundation piles in the non-uniform settlement area to be remediated, it further comprises:
determining an uneven settlement area to be remediated based on the height of the embankment body of the roadbed;
wherein the ratio of the length of the non-uniform settlement area to be remediated to the height of the embankment body is 3 to 6.
In a possible embodiment, the step of constructing underpinning foundation piles in the non-uniform settlement area to be remediated comprises:
forming a pile hole to the upper limit of frozen soil;
preparing and forming a underpinning foundation pile through a reinforced concrete pouring process;
wherein the diameter of the pile hole is 0.8-1.5 m;
wherein, still include in the preparation of foundation pile that forms the underpinning through reinforced concrete pouring technology:
and connecting the embedded bars of the pile foundation connecting piece with the main bars of the underpinning foundation pile so that the embedded bars of the pile foundation connecting piece are embedded in pile foundation concrete of the underpinning foundation pile.
In a possible embodiment, the step of providing joists on the underpinning foundation pile comprises:
and connecting the joist with a pile foundation connecting piece on the underpinning foundation pile, and fastening the joist through a connecting bolt.
In one possible embodiment, the step of providing tie swabs on the joists to form an overhead replacement bracket comprises:
and welding sleeper underpins to the joists to form the overhead replacement bracket.
In one possible embodiment, the process for repairing the differential settlement deformation region of the roadbed further comprises:
removing railway ballasts at the upper part of the joist, and disassembling the existing sleeper and the existing steel rail;
removing the existing embankment body layer by layer, and removing the bridge head cone protector along the bridge head of the roadbed;
wherein, a underpinning cross section is formed along the height direction of the existing embankment body in the process of removing the existing embankment body, and the area ratio of the underpinning cross section to the slope surface of the embankment body is less than or equal to 1;
wherein the thickness of the embankment body is less than or equal to 0.5m each time.
In one possible embodiment, the step of filling the circumferential side of the overhead replacement bracket with a replacement filler comprises:
forming a sub-clay layer having a thickness of 0.3m to 0.5m at the bottom of the underpinned cross-section;
setting a displacement filler on the sub-clay layer;
wherein, the block diameter of the replacement filler is 10cm to 15cm, the void ratio is 30% to 50%, and the tiling thickness is 50cm to 100cm;
wherein, the filling height of the replacement filler is the same as the height of the existing embankment body.
According to a second aspect of the embodiment of the present application, a frozen soil remediation roadbed structure is provided, which is prepared by using the roadbed differential settlement deformation zone remediation process according to any one of the above technical schemes, and the frozen soil remediation roadbed structure includes:
underpinning foundation piles;
the joist is arranged on the underpinning foundation pile;
the sleeper underpinning piece is arranged on the joist;
and the filling filler is arranged on the periphery of the underpinning foundation pile and is positioned at the bottom of the sleeper underpinning piece.
In one possible embodiment, the frozen soil remediation roadbed structure further comprises:
pile foundation connecting pieces, wherein part of the pile foundation connecting pieces are pre-buried in the underpinning foundation pile;
and the joist is connected with the underpinning foundation pile through the pile foundation connecting piece and the connecting bolt.
In one possible embodiment, the sleeper holder is welded to the joist.
Compared with the prior art, the application at least comprises the following beneficial effects: the roadbed differential settlement deformation region repairing process provided by the embodiment of the application comprises the steps of constructing underpinning foundation piles in the differential settlement region to be repaired; a joist is arranged on the underpinning foundation pile; arranging sleeper underpinning pieces on the joists to form an overhead replacement bracket; the periphery of the overhead replacement bracket is filled with the replacement filler, based on the embodiment of the application, the uneven settlement disease characteristics of the bridge head roadbed in the permafrost area are combined, the bracket underpinning mode is adopted, the existing track is overhead, the roadbed filler is replaced, the safety and uninterrupted operation of a train can be ensured, and the replacement engineering of the roadbed filler can be completed.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic step flow diagram of a process for repairing a non-uniform settlement deformation zone of a subgrade according to an embodiment of the present application;
FIG. 2 is a schematic block diagram of a frozen soil remediation roadbed structure according to one embodiment of the present application;
fig. 3 is a schematic structural view of a embankment body in a embankment body excavated state in a preparation process of a frozen soil remediation roadbed structure according to an embodiment of the present application;
FIG. 4 is a schematic block diagram of an overhead replacement bracket in the process of preparing a frozen soil remediation roadbed structure according to one embodiment of the present application;
FIG. 5 is a schematic block diagram of joists and sleeper replacement members in the process of preparing a frozen soil remediation roadbed structure according to one embodiment of the present application;
FIG. 6 is a schematic structural view of a condition of underpinning foundation piles and pile foundation connectors in the process of preparing a frozen soil remediation roadbed structure according to one embodiment of the present application;
FIG. 7 is a schematic block diagram showing another state of underpinning foundation piles and pile foundation connectors in the process of preparing a frozen soil remediation roadbed structure according to one embodiment of the present application;
fig. 8 is a schematic structural diagram of a filling state of a replacement filler in a process of preparing a frozen soil remediation roadbed structure according to an embodiment of the present application.
The correspondence between the reference numerals and the component names in fig. 2 to 8 is:
the bridge comprises a bridge abutment, a 2-road embankment body, a 3-bridge head cone, 4 existing sleepers, 5 existing steel rails, 6 underpinning foundation piles, 7 joists, 8 sleeper underpinning pieces, 9 underpinning cross sections, 10 pile foundation connecting pieces, 11 connecting bolts, 12 quick welding connecting joints, 13 main ribs, 14 pre-buried ribs, 15 pile foundation concrete and 16 replacement fillers.
Detailed Description
In order to better understand the above technical solutions, the following detailed description of the technical solutions of the embodiments of the present application is made by using the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and not limit the technical solutions of the present application, and the technical features of the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1, according to a first aspect of the embodiment of the present application, a process for repairing a non-uniform settlement deformation region of a roadbed is provided, including:
step 101: building underpinning foundation piles in the non-uniform settlement area to be remedied;
step 102: a joist is arranged on the underpinning foundation pile;
step 103: arranging sleeper underpinning pieces on the joists to form an overhead replacement bracket;
step 104: and filling the periphery of the overhead replacement bracket with replacement filler.
The roadbed differential settlement deformation zone remediation process provided by the embodiment of the application comprises the following steps: building underpinning foundation piles in the non-uniform settlement area to be remedied; a joist is arranged on the underpinning foundation pile; arranging sleeper underpinning pieces on the joists to form an overhead replacement bracket; the periphery of the overhead replacement bracket is filled with the replacement filler, based on the embodiment of the application, the uneven settlement disease characteristics of the bridge head roadbed in the permafrost area are combined, the bracket underpinning mode is adopted, the existing track is overhead, the roadbed filler is replaced, the safety and uninterrupted operation of a train can be ensured, and the replacement engineering of the roadbed filler can be completed.
It can be understood that the process for repairing the uneven settlement deformation area of the roadbed provided by the embodiment of the application is not only suitable for repairing uneven settlement deformation diseases of the bridge head roadbed in a permafrost area, but also suitable for repairing uneven diseases of the bridge head roadbed in areas such as a collapsible loess area and a desert area.
In a possible embodiment, before the step of constructing underpinning foundation piles in the non-uniform settlement area to be remediated, it further comprises: determining an uneven settlement area to be remedied based on the height of the embankment body of the roadbed; wherein, the ratio of the length of the uneven settlement area to be remedied to the height of the embankment body is 3 to 6.
In the technical scheme, a step of determining an uneven settlement area to be remedied is further provided, and the roadbed uneven settlement deformation area remediation process provided by the embodiment of the application can firstly determine the treatment length and the underpinning position of the roadbed disease body of the railway bridge head (shown in figure 2); then adopting a disease body treatment underpinning and excavating structure (shown in fig. 2 and 3) and using overhead replacement brackets (shown in fig. 4, 5, 6 and 7) to overhead the existing steel rail 5, so as to excavate the disease body of the bridge head roadbed (shown in fig. 3); finally, the removed part of the bridge head roadbed disease body is replaced by adopting a filler replacement (as shown in figure 7).
In the process of determining the uneven settlement area to be remedied, as shown in fig. 2, the longitudinal treatment length l=3h-6 h of the disease body is determined according to the height of 3-6 times of the embankment body 2 on the left and right road shoulders of the transition section embankment body 2 from the back of the abutment surface 1 (where h is the height of the bridge head embankment body 2 and L is the length of the uneven settlement area to be remedied), and further, the plane position of the underpinning foundation pile 6 can be determined along the longitudinal treatment range of the uneven settlement area to be remedied so as to reasonably determine the remediation area and reasonably layout the underpinning foundation pile 6.
It can be understood that if the ratio of the length of the uneven settlement area to be remedied to the height of the embankment body is less than 3, the length of the uneven settlement area to be remedied is too short, and if the ratio of the length to the height of the uneven settlement area to be remedied to the height of the embankment body is greater than 6, the length of the uneven settlement area to be remedied is too long, the construction period is increased, and meanwhile, the strength of the overhead replacement bracket is possibly reduced, so that the safe operation of the rail transit system is affected.
In a possible embodiment, the step of constructing underpinning foundation piles in the non-uniform settlement area to be remediated comprises: forming a pile hole to the upper limit of frozen soil; preparing and forming a underpinning foundation pile through a reinforced concrete pouring process; wherein, the aperture of the pile hole is 0.8 to 1.5m; wherein, still include in the preparation of foundation pile that forms the underpinning through reinforced concrete pouring technology: and connecting the embedded bars of the pile foundation connecting piece with the main bars of the underpinning foundation pile so that the embedded bars of the pile foundation connecting piece are embedded in pile foundation concrete of the underpinning foundation pile.
As shown in fig. 2, in this technical solution, the specific step of constructing the underpinning foundation pile 6 is further improved, and in the process of preparing the overhead replacement bracket for overhead replacement of the railway bridge head subgrade, the underpinning foundation pile 6 is formed first, and the diameter of the underpinning foundation pile 6 is 0.8-1.5 m. The method can be used for manually digging holes to the upper limit of the permafrost by adopting a matched small-sized machine or tool from the road shoulder position. After the pile hole is formed, the pile is manufactured according to the pile forming process of the reinforced concrete filling pile, and the underpinning foundation pile 6 is formed. In the process of forming the underpinning foundation pile 6, the pile foundation connecting piece 10 is welded and connected with the pre-buried ribs 14 and the main ribs 13 of the underpinning foundation pile 6 in the pouring process of the underpinning foundation pile 6, and the pre-buried ribs and the main ribs are jointly poured in the bracket pile foundation concrete 15 of the underpinning foundation pile 6.
The underpinning foundation pile has the diameter of 0.8-1.5 m, and holes are dug to the upper limit of the permafrost, so that the underpinning foundation pile can be ensured to have enough supporting strength.
As shown in fig. 7, the pre-buried ribs 14 of the pile foundation connector 10 are welded to the main ribs 13 of the underpinning foundation pile 6, so that the pile foundation connector 10 can be fixed more reliably, and the subsequent joist 7 can be installed conveniently.
In a possible embodiment, the step of providing joists on the underpinning foundation pile comprises: and connecting the joist with a pile foundation connecting piece on the underpinning foundation pile, and fastening the joist through a connecting bolt.
As shown in fig. 4 and 5, in this technical solution, a connection mode of the joist 7 is further provided, and when the red clay of the underpinning foundation pile 6 is completely solidified and reaches the use strength, the joist 7 can be mounted on the upper portion of the underpinning foundation pile 6, accurately abutted with the pile foundation connecting piece 10, and the joist 7 can be rapidly and firmly mounted on the underpinning foundation pile 6 through the connecting bolt 11. This arrangement can improve the assembly efficiency of the joist 7.
In one possible embodiment, the step of providing tie swabs on joists to form an overhead replacement bracket comprises: the sleeper bracket is welded to the joist to form an overhead replacement bracket.
As shown in fig. 5, in this technical solution, the installation mode of the sleeper underpinning member 8 is further improved, the sleeper underpinning member 8 can be placed on the joist 7 according to the original sleeper position and interval, and the sleeper underpinning member 8 is firmly connected with the joist 7 by adopting a fast welding connection seam 12, so that the sleeper underpinning member 8 can be fast installed, and meanwhile, the fixing strength of the sleeper underpinning member 8 is guaranteed.
In one possible embodiment, the process for repairing the differential settlement deformation region of the roadbed further comprises: removing railway ballasts on the upper part of the joist, and disassembling the existing sleeper and the existing steel rail; removing the existing embankment body layer by layer, and removing the bridge head cone protector along the bridge head of the roadbed; wherein, a underpinning cross section is formed along the height direction of the existing embankment body in the process of removing the existing embankment body, and the area ratio of the underpinning cross section to the slope of the embankment body is less than or equal to 1; wherein the thickness of the embankment body is less than or equal to 0.5m each time.
In the technical scheme, the concrete steps of overhead underpinning and removing of the bridge head roadbed are further provided, and the existing sleeper 4 in the disease curing range can be underpinned after the installation of the overhead replacement bracket for the overhead replacement of the railway bridge head roadbed is completed (as shown in fig. 2). Before the existing sleeper 4 is underpinned, the railway ballasts on the upper portion of the joist 7 can be excavated in advance, when the existing sleeper 4 and the existing steel rail 5 are in a loose state, the existing sleeper 4 can be removed one by one, the underpinned sleeper is installed at the position of the existing sleeper 4, and the underpinned sleeper and the joist 7 can be fixedly connected in a welding mode by adopting a quick welding connecting seam 12. After the joist 7 and the underpinning sleeper are installed, the working state of each connecting part needs to be checked, and the stability of the sleeper is checked by means of the actual running test of the train. After the safe and stable running of the overhead train is confirmed, the embankment body 2 can be excavated layer by layer, the bridge head cone protector 3 is excavated along the back of the bridge abutment 1, the slope proportion of the underpinning cross section 9 is ensured to be not more than 1:1 in the process of excavating the embankment body 2, and the layer by layer excavation thickness is not more than 0.5m. This arrangement ensures safe removal of embankment body 2.
In one possible embodiment, the step of filling the peripheral side of the overhead replacement bracket with a replacement filler comprises: forming a sub-clay layer with a thickness of 0.3m to 0.5m at the bottom of the underpinning cross section; setting a replacement filler on the sub-clay layer; wherein, the block diameter of the replacement filler is 10cm to 15cm, the void ratio is 30% to 50%, and the tiling thickness is 50cm to 100cm; wherein, the filling height of the replacement filler is the same as that of the existing embankment body.
As shown in fig. 8, in this technical solution, there is further provided a specific step of filling the replacement filler 16, and when the underpinning section 9 is formed in the overhead replacement of the railway bridge head subgrade in the permafrost region, the section can be backfilled with the replacement filler 16. In backfill replacement, the bottom of the cross section is horizontally covered by loam with the thickness of 0.3-0.5 m, then a block stone is paved on the loam to replace the filler 16, the diameter of the block stone of the replaced filler 16 is not less than 10cm and not more than 50cm, the void ratio is controlled between 30 and 50 percent, and the paving thickness is controlled between 50 and 100 cm. The tiling of replacement filler 16 adopts artifical sign indicating number to build, and the height is unanimous with the design height of bridgehead road bed embankment body 2, then throws the material in the middle of earlier both sides afterwards, so set up can make underpinning foundation pile 6 obtain stable fixing, makes the overhead replacement bracket possess sufficient intensity and supports past traffic facilities.
As shown in fig. 2 to 8, a second aspect of the embodiment of the present application provides a frozen soil remediation roadbed structure, which is prepared by using the roadbed differential settlement deformation zone remediation process according to any one of the above technical schemes, wherein the frozen soil remediation roadbed structure includes: underpinning foundation piles 6; the joist 7 is arranged on the underpinning foundation pile 6; the sleeper underpinning piece 8 is arranged on the joist 7; and the filling material is arranged on the periphery of the underpinning foundation pile 6 and is positioned at the bottom of the sleeper underpinning piece 8.
The frozen soil remediation roadbed structure provided by the embodiment of the application is prepared by the roadbed uneven settlement deformation zone remediation process according to any one of the technical schemes, so that the frozen soil remediation roadbed structure has all the beneficial effects of the roadbed uneven settlement deformation zone remediation process according to the technical scheme, and no description is given here.
In one possible embodiment, the frozen soil remediation roadbed structure further comprises: pile foundation connecting pieces 10, wherein part of pile foundation connecting pieces 10 are pre-buried in the underpinning foundation pile 6; the connecting bolts 11 and the joists 7 are connected to the underpinning foundation piles 6 through pile foundation connecting pieces 10 and the connecting bolts 11.
In one possible embodiment, the sleeper carrier 8 is welded to the joist 7.
In some examples, as shown in fig. 1 to 6, the railway bridge head subgrade before the remediation includes a bridge abutment 1, a embankment body 2, a bridge head cone 3, an existing sleeper 4 and an existing rail 5, and the frozen soil remediation subgrade structure includes underpinning foundation piles 6, joists 7, sleeper underpinning pieces 8, underpinning cross sections 9, pile foundation connectors 10, connecting bolts 11, quick welding connecting joints 12, bracket pile foundation main ribs 13, connector embedded ribs 14, pile foundation concrete 15 and replacement fillers 16.
The underpinning foundation pile 6 is a main body part, is a hole-digging filling pile and is a temporary bearing part. In the construction of the field physical engineering, according to the road bed section of the bridge head to be treated, a matched small machine or tool mode is adopted from the road shoulder position, manual hole digging is carried out to the upper limit of the permafrost, and the hole digging aperture is 0.8-1.5 m. And after the pile hole is formed, the pile is manufactured according to a pile forming process of the reinforced concrete filling pile.
The joist 7 is arranged on the upper part of the underpinning foundation pile 6 and mainly plays a role in overhead lifting the track and bearing the load of the past train before the original filling soil of the bridge head roadbed is excavated. The joist 7 is a simple steel girder, can be arranged into an I shape or a mouth shape by channel steel or I steel according to the load form, and has the setting length which is 1.2-1.5 times of the longitudinal length of the bridge head roadbed repairing paragraph. The joist 7 is provided with a quick connection peg 11 hole at the connection with the underpinning foundation pile 6 for quick installation during construction.
The sleeper replacement part is used for replacing an original railway sleeper in underpinning construction, is in the form of an I-shaped small steel part, has the same longitudinal installation space as the original sleeper space, and is firmly connected with the joist 7 by adopting a quick welding connection joint 12 after being placed on the joist 7 according to the original sleeper position.
The pile foundation connecting piece 10 is a connecting part of the underpinning foundation pile 6 and the joist 7, and the pile foundation connecting piece 10 enables a connecting piece embedded rib 14 to be connected with a main rib 13 of a bracket pile foundation thereof through welding in the pouring process of the underpinning foundation pile 6 and is poured in bracket pile foundation concrete 15 of the underpinning foundation pile 6 together.
Wherein, connecting bolt 11 is pre-buried high strength bolt, arranges on pile foundation connecting piece 10 through welded mode, places in the underpinning foundation pile 6 after the design according to the design at the underpinning 7, firmly installs on the underpinning foundation pile 6 through connecting bolt 11 with the underpinning 7.
The replacement filler 16 is a replacement part of the railway bridge head roadbed embankment body 2 for treating diseases in permafrost regions, the filler type of the part is block stones with coarse-grained soil serving as mattress layers, the block diameter is not less than 10cm and not more than 50cm, and the void ratio is controlled to be 30-50%.
In the present application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present application.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The utility model provides a roadbed differential settlement deformation area renovation technology which is characterized in that the technology comprises the following steps: building underpinning foundation piles in the non-uniform settlement area to be remedied, wherein the underpinning foundation piles are positioned on two sides of the existing steel rail;
the underpinning foundation pile is provided with an underpinning beam which extends along the length direction of the existing steel rail;
arranging sleeper underpins on the joists to form overhead replacement brackets, in particular:
before the existing sleeper is underpinned, the railway ballast at the upper part of the joist is firstly excavated, when the existing sleeper and the existing steel rail are in a loose state, the existing sleeper is removed one by one, sleeper underpinning pieces are arranged at the positions of the existing sleeper, and the sleeper underpinning pieces and the joist are fixedly connected in a quick welding connection seam welding mode; after the joist and sleeper underpinning parts are installed, the working state of each connecting part is checked, the stability of the connecting parts is checked through a mode of actual running inspection of a train, the embankment body is excavated layer by layer after the condition that the safety and stable running of the train after overhead is met is confirmed, an abutment protecting cone is excavated along the back surface of an abutment, the slope proportion of the underpinning cross section is ensured to be not more than 1:1 in the process of excavating the embankment body, and the layer-by-layer excavation thickness is ensured to be not more than 0.5m;
filling replacement filler on the periphery of the overhead replacement bracket, comprising: forming a sub-clay layer having a thickness of 0.3m to 0.5m at the bottom of the underpinned cross-section;
setting a displacement filler on the sub-clay layer;
wherein, the block diameter of the replacement filler is 10cm to 15cm, the void ratio is 30% to 50%, and the tiling thickness is 50cm to 100cm;
wherein, the filling height of the replacement filler is the same as the height of the existing embankment body.
2. The process for repairing a non-uniform settlement deformation zone of a roadbed according to claim 1, further comprising, before the step of constructing underpinning foundation piles in the non-uniform settlement zone to be repaired: determining an uneven settlement area to be remediated based on the height of the embankment body of the roadbed;
wherein the ratio of the length of the non-uniform settlement area to be remediated to the height of the embankment body is 3 to 6.
3. The process for repairing a non-uniform settlement deformation zone of a roadbed according to claim 1, wherein the step of constructing underpinning foundation piles in the non-uniform settlement zone to be repaired comprises: forming a pile hole to the upper limit of frozen soil;
preparing and forming a underpinning foundation pile through a reinforced concrete pouring process;
wherein the diameter of the pile hole is 0.8-1.5 m;
wherein, still include in the preparation of foundation pile that forms the underpinning through reinforced concrete pouring technology: and connecting the embedded bars of the pile foundation connecting piece with the main bars of the underpinning foundation pile so that the embedded bars of the pile foundation connecting piece are embedded in pile foundation concrete of the underpinning foundation pile.
4. The process for repairing a non-uniform settlement deformation zone of a roadbed according to claim 1, wherein the step of disposing joists on the underpinning foundation piles comprises: and connecting the joist with a pile foundation connecting piece on the underpinning foundation pile, and fastening the joist through a connecting bolt.
5. The process for repairing a non-uniform settlement deformation zone of a roadbed according to claim 1, wherein the step of providing sleeper holders on the joists to form an overhead replacement bracket comprises: and welding sleeper underpins to the joists to form the overhead replacement bracket.
6. A frozen soil remediation roadbed structure prepared by a roadbed differential settlement deformation zone remediation process according to any one of claims 1 to 5, the frozen soil remediation roadbed structure comprising: underpinning foundation piles;
the joist is arranged on the underpinning foundation pile;
the sleeper underpinning piece is arranged on the joist;
and the filling filler is arranged on the periphery of the underpinning foundation pile and is positioned at the bottom of the sleeper underpinning piece.
7. The frozen soil remediation roadbed structure of claim 6, further comprising: pile foundation connecting pieces, wherein part of the pile foundation connecting pieces are pre-buried in the underpinning foundation pile;
and the joist is connected with the underpinning foundation pile through the pile foundation connecting piece and the connecting bolt.
8. The frozen soil remediation roadbed structure of claim 7 wherein the tie joists are welded to the joists.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2052007C1 (en) * | 1988-02-29 | 1996-01-10 | Петр Степанович Лобов | Railway track and method for its construction |
| KR20090084054A (en) * | 2008-01-31 | 2009-08-05 | 한국철도기술연구원 | Structure of concrete track reinforced by piled raft foundation and its constructing and maintaining method |
| CN202865715U (en) * | 2012-09-09 | 2013-04-10 | 中铁二院工程集团有限责任公司 | Repairing and reinforcing structure of existing roadbed pile plate structure |
| CN106283950A (en) * | 2016-09-15 | 2017-01-04 | 中铁第四勘察设计院集团有限公司 | Medium-and low-speed maglev traffic engineering two-wire embankment location pile foundation joist type support rail beam transition section structure |
| CN108239896A (en) * | 2018-03-21 | 2018-07-03 | 中铁二十三局集团第四工程有限公司 | Existing railway Disease Treatment of Foundation Base fixed track usage plan constructing structure and construction method |
| CN208545626U (en) * | 2018-06-11 | 2019-02-26 | 中国铁路设计集团有限公司 | A kind of displacement stake ruggedized construction suitable for soft clay area existing line |
| CN110952389A (en) * | 2019-12-17 | 2020-04-03 | 同济大学 | Pile combined structure construction method for controlling uneven settlement of transition section of high-speed railway bridge |
| CN210564549U (en) * | 2019-06-17 | 2020-05-19 | 广州地铁设计研究院股份有限公司 | Supporting system of existing railway |
| CN211815198U (en) * | 2020-03-09 | 2020-10-30 | 中铁二院工程集团有限责任公司 | Soft soil foundation roadbed structure and roadbed system suitable for railway single turnout |
| CN211815196U (en) * | 2020-03-04 | 2020-10-30 | 中铁二院工程集团有限责任公司 | Railway roadbed structure |
| CN113931212A (en) * | 2021-11-25 | 2022-01-14 | 中铁四院集团西南勘察设计有限公司 | Road and bridge transition section structure for tramcar and construction method thereof |
| CN216809384U (en) * | 2022-03-04 | 2022-06-24 | 中铁第六勘察设计院集团有限公司 | Railway roadbed suitable for island frozen soil area |
| CN115434191A (en) * | 2022-10-17 | 2022-12-06 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Deep deformation treatment method for ballast track subgrade of operation railway |
-
2022
- 2022-12-15 CN CN202211612867.3A patent/CN115839045B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2052007C1 (en) * | 1988-02-29 | 1996-01-10 | Петр Степанович Лобов | Railway track and method for its construction |
| KR20090084054A (en) * | 2008-01-31 | 2009-08-05 | 한국철도기술연구원 | Structure of concrete track reinforced by piled raft foundation and its constructing and maintaining method |
| CN202865715U (en) * | 2012-09-09 | 2013-04-10 | 中铁二院工程集团有限责任公司 | Repairing and reinforcing structure of existing roadbed pile plate structure |
| CN106283950A (en) * | 2016-09-15 | 2017-01-04 | 中铁第四勘察设计院集团有限公司 | Medium-and low-speed maglev traffic engineering two-wire embankment location pile foundation joist type support rail beam transition section structure |
| CN108239896A (en) * | 2018-03-21 | 2018-07-03 | 中铁二十三局集团第四工程有限公司 | Existing railway Disease Treatment of Foundation Base fixed track usage plan constructing structure and construction method |
| CN208545626U (en) * | 2018-06-11 | 2019-02-26 | 中国铁路设计集团有限公司 | A kind of displacement stake ruggedized construction suitable for soft clay area existing line |
| CN210564549U (en) * | 2019-06-17 | 2020-05-19 | 广州地铁设计研究院股份有限公司 | Supporting system of existing railway |
| CN110952389A (en) * | 2019-12-17 | 2020-04-03 | 同济大学 | Pile combined structure construction method for controlling uneven settlement of transition section of high-speed railway bridge |
| CN211815196U (en) * | 2020-03-04 | 2020-10-30 | 中铁二院工程集团有限责任公司 | Railway roadbed structure |
| CN211815198U (en) * | 2020-03-09 | 2020-10-30 | 中铁二院工程集团有限责任公司 | Soft soil foundation roadbed structure and roadbed system suitable for railway single turnout |
| CN113931212A (en) * | 2021-11-25 | 2022-01-14 | 中铁四院集团西南勘察设计有限公司 | Road and bridge transition section structure for tramcar and construction method thereof |
| CN216809384U (en) * | 2022-03-04 | 2022-06-24 | 中铁第六勘察设计院集团有限公司 | Railway roadbed suitable for island frozen soil area |
| CN115434191A (en) * | 2022-10-17 | 2022-12-06 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Deep deformation treatment method for ballast track subgrade of operation railway |
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