CN113550184A - Construction method of assembled foundation pit, rail weighbridge foundation and integral ballast bed - Google Patents
Construction method of assembled foundation pit, rail weighbridge foundation and integral ballast bed Download PDFInfo
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- CN113550184A CN113550184A CN202110859682.1A CN202110859682A CN113550184A CN 113550184 A CN113550184 A CN 113550184A CN 202110859682 A CN202110859682 A CN 202110859682A CN 113550184 A CN113550184 A CN 113550184A
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- 238000010276 construction Methods 0.000 title claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 23
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000009412 basement excavation Methods 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 32
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 32
- 230000008569 process Effects 0.000 description 10
- 238000011161 development Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 241001669679 Eleotris Species 0.000 description 2
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010012411 Derailment Diseases 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/06—Transporting, laying, removing or renewing sleepers
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
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Abstract
A construction method for an assembled foundation pit, a track scale foundation and an integral ballast bed relates to the technical field of railway metering equipment construction, and solves the problem of long installation and construction time. Prefabricating a rail weighbridge foundation, prefabricating an integral ballast bed plate, and excavating a foundation pit for installing a corresponding rail weighbridge foundation pit and the integral ballast bed plate; hoisting a prefabricated rail weighbridge foundation pit into the foundation pit, and hoisting an integral ballast bed plate into the foundation pit; and backfilling and tamping the foundation pit. The construction method is used for arranging the rail weighers on the railway line.
Description
Technical Field
The embodiment of the application relates to but is not limited to the technical field of railway metering equipment construction, in particular to a construction method of an assembled foundation pit, a track scale foundation and an integral ballast bed.
Background
With the development of railway metering equipment, the rail weighbridge is gradually developed into a single-platform dynamic rail weighbridge and a double-platform dynamic rail weighbridge from a single static rail weighbridge, the metering technology is developed into a dynamic state from a static state, the requirement on the railway track is higher and higher, and the deformation accumulation process of the traditional track is accelerated rapidly. Along with the large-scale transformation and upgrading of the foundation pit and the whole ballast bed of the rail weighbridge of each road bureau, the construction for installing the rail weighbridge on the existing line is more and more, but the interruption of operation can generate great influence on railway transportation, so that the interruption of operation for construction operation can not adapt to the current economic development form.
Therefore, with the development of market economy, the related technology provides an integral construction method of the assembly type track scale, and concrete modules corresponding to four different functional areas of the integral ballast bed are prefabricated in a factory manner; and hoisting the concrete modules to the open cut foundation pit at the installation position of the railroad track scale for assembly, connecting the concrete modules into a whole in a reinforcing steel sleeve grouting mode to form an integral track bed of the railroad track scale, and finally installing a railroad track scale body and paving a track ballast.
Although the construction period can be relatively shortened by adopting a method of prefabricating the integral track bed in advance in modules and finally transporting the integral track bed to a site for assembly in the related technology at the present stage, the construction and installation processes still need to block the line and interrupt the railway operation.
Disclosure of Invention
The invention mainly provides a construction method of an assembled foundation pit, a track scale foundation and an integral ballast bed, and aims to solve the problem of overlong hoisting and mounting time.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a construction method of an assembled foundation pit, a rail weighbridge foundation and an integral ballast bed comprises the following steps:
prefabricating a rail weighbridge foundation, prefabricating an integral ballast bed board, excavating a foundation pit for installing a corresponding rail weighbridge foundation pit and the integral ballast bed board, hoisting the prefabricated rail weighbridge foundation pit into the foundation pit, and hoisting the integral ballast bed board into the foundation pit; and backfilling and tamping the foundation pit.
Further, before excavating a foundation pit for installing a corresponding rail weighbridge foundation pit and an integral track bed board, the construction method further comprises the following steps: and (5) reinforcing the roadbed at two sides of the line of the pre-excavated foundation pit.
Further, the roadbed is reinforced into steel sheet piling piles.
Further, after excavating the foundation pit for installing the corresponding rail weighbridge foundation pit and the whole track bed plate, the construction method further comprises the following steps: and (4) reinforcing the lines on two sides of the line of the foundation pit, and erecting a construction temporary beam.
Further, the line is reinforced to be made into manual hole digging piles at intervals along the extending direction of the line.
Further, after the step of backfilling and tamping the foundation pit, the construction method further comprises the following steps: and (5) dismantling the construction temporary beam and the manual hole digging pile.
Further, prefabricate the rail weighbridge basis with in the step of prefabricated whole railway roadbed board, still include: various components such as embedded steel bar hanging rings, steel plates and the like.
Further, after the step of backfilling and tamping the foundation pit, the construction method further comprises the following steps: and removing the part of the hoisting ring reinforcing steel bar, which is exposed out of the plane of the foundation pit after the foundation pit is tamped.
Further, the step of excavating the foundation pit for installing the corresponding rail weighbridge foundation pit and the whole track bed plate further comprises: and arranging a waterproof and drainage system.
The invention provides a construction method of an assembled foundation pit, a rail weighbridge foundation and an integral ballast bed. By prefabricating the track scale foundation pit and the whole track bed plate in advance and then carrying out hoisting, assembling and construction, the on-line construction can be completed in the skylight time, the influence on the railway line operation is greatly reduced, and the safe and quick construction is realized.
Drawings
Fig. 1 is a plan view of an integral track bed of a track scale apparatus with a foundation pit according to an embodiment of the present application;
fig. 2 is a cross-sectional view of an integral track bed of a track scale apparatus with a foundation pit according to an embodiment of the present disclosure;
fig. 3 is a plan view of a railroad track scale pit of a railroad track scale apparatus provided in an embodiment of the present application;
fig. 4 is one of cross-sectional views of a foundation pit of a track scale apparatus having a foundation pit according to an embodiment of the present disclosure;
fig. 5 is a second cross-sectional view of the arrangement of the drainage pipe of the foundation pit of the track scale with the foundation pit according to the embodiment of the present application;
fig. 6 is a flowchart of a method for constructing an assembly type foundation pit, a track scale foundation and an integral ballast bed according to an embodiment of the present disclosure;
fig. 7 is a second flowchart of a construction method of an assembly type foundation pit, a railroad track scale foundation and an integral ballast bed according to the embodiment of the present application;
fig. 8 is a third flowchart of a construction method of an assembly type foundation pit, a track scale foundation and an integral ballast bed according to the embodiment of the present application.
Reference numerals:
1-a ballast bed; 2, foundation pit; 3-a railroad track scale foundation; 4-steel rail; 5-sleeper; 6-a fastener; (ii) a 21-a drain line; 22-a threading tube; 31-steel plate.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
Railway transportation is a mode for transporting passengers and goods, plays an important role in the social substance production process, is widely applied by virtue of the advantages of large transportation amount, high speed, low cost and no limitation of climatic conditions, and has been established in new China, so that the railway transportation industry has great development. The layout is gradually improved, and except Tibet, all provinces, cities and autonomous regions are communicated with railways. Therefore, in railway transportation, the railway line construction problem also appears to be very important.
The railway line generally consists of two parts, namely a foundation and a track, wherein the track is important basic equipment of the railway, is mainly used for guiding vehicles to run, can directly bear the load of a train and can transmit the load to the lower foundation. The rail should ensure that the rolling stock has enough strength and stability when running under the specified maximum load and maximum speed, so the quality of the construction method of the rail affects the problems of whether the rail can normally run and the length of the operation time. As shown in fig. 1 and 2, the track is generally composed of rails 4, ties 5, fasteners 6, and a track bed 1, which is also referred to as the superstructure of the railway line.
The steel rail 4 is used for supporting and guiding wheels, reducing resistance for rolling of the wheels and bearing acting force of the wheels; the sleeper 5 not only can transmit the pressure transmitted by the steel rail 4 to the track bed 1 by supporting the steel rail 4, but also can keep the position and the track gauge of the steel rail 4; the fastener 6 is used for connecting the steel rail 4 to the sleeper 5; it should be noted that the track bed 1 is an important component of the track, and is interposed between the tie 5 and the roadbed, and transmits the pressure from the tie 5 to the track base uniformly.
The foundation part of the track is mainly the foundation pit 2 part, as shown in fig. 2, the foundation pit 2 part is the foundation of the track and is an important part for ensuring the railway operation, and the foundation pit 2 part is called as the underground building of the railway track.
In recent years, with the development of railway metering equipment, a concept of a railroad scale is also proposed, the railroad scale is specifically a weighing apparatus for weighing the load of a railway wagon, and is mainly divided into a static railroad scale, a dynamic railroad scale and a light railroad scale, with the development of the society, the railroad scale is gradually developed from a single static railroad scale to a single-platform dynamic railroad scale and a double-platform dynamic railroad scale, a metering technology is developed from a static state to a dynamic state, the requirements on a railway track are higher and higher, and the deformation accumulation process of a traditional track is rapidly accelerated, so that a concept of a railroad scale foundation 3 is proposed, and as shown in fig. 4, the railroad scale foundation 3 can also be called a railroad scale foundation pit. The basic part of the current phase line comprises two parts: one part is a foundation pit 2 part, and the other part is a rail weighbridge foundation 3 part. In summary, the most important three parts in the railway line are the foundation pit 2 part, the track scale foundation 3 part and the track bed 1 part, how to reasonably arrange the time and the sequence of the three parts, and the main problem existing at the present stage is to reduce the construction time to the greatest extent.
The embodiment of the application provides a construction method of an assembled foundation pit, a track scale foundation and an integral ballast bed, and particularly, as shown in fig. 6, the construction method comprises the following steps:
step S1: and (4) prefabricating an integral ballast bed plate.
Step S2: and (5) prefabricating a track scale foundation.
Step S3: and excavating a foundation pit for installing a corresponding rail weighbridge foundation pit and an integral track bed plate.
Step S6: and hoisting the prefabricated rail weighbridge foundation pit into the foundation pit.
Step S7: and hoisting the whole ballast bed plate to the foundation pit.
Step S8: and backfilling and tamping the foundation pit.
Because the steps of prefabricating the track scale foundation 3 in the step S2, prefabricating the integral track scale foundation pit 1 in the step S1 and excavating the integral track scale foundation pit 2 in the step S3 can be in different construction areas in the implementation process, the steps of prefabricating the track scale foundation 3 in the step S2, prefabricating the integral track scale foundation pit 1 in the step S1 and excavating the integral track scale foundation pit 2 in the step S3 do not have specific sequence requirements, and even the three steps can be performed simultaneously.
It should be specifically noted that the prefabricated track scale foundation pit 3 and the integral track bed slab 1 are located on a track line, and the track scale foundation pit 3 and the integral track bed slab 1 are not assembled with each other, so that the step S6 and the step S7 can be performed simultaneously, and the hoisting time is saved.
Compared with the prior art, the method has the advantages that the concrete modules are prefabricated firstly and then hoisted into the track scale foundation 3 to be assembled, and the concrete modules are connected into a whole in the track scale foundation 3 in a steel bar sleeve grouting mode to form the integral ballast bed 1, so that the concrete modules are not required to be connected into the integral ballast bed 1 in various modes in the assembling process, the solidification time of the concrete modules is increased, the online construction can be completed in a skylight, the time for influencing the line operation in the three steps is only the hoisting time, the influence on the railway line operation is greatly reduced, and the safe and quick construction is realized.
Specifically, referring to fig. 7, the construction method further includes:
step S4: and (5) reinforcing the roadbed. Specifically, the step S4 of reinforcing the roadbed is performed before the step S3 of excavating the foundation pit 2 for installing the corresponding railroad track scale foundation pit and the monolithic track bed slab, and the main positions of reinforcing the roadbed are on both sides of the line of the pre-excavated foundation pit 2.
In the related art, some geological conditions on site are not analyzed and researched, the foundation pit 2 is directly excavated, the phenomenon of collapse of the foundation pit 2 occurs, so that the construction period is delayed, and more serious casualties are caused, so that the step S4 of reinforcing the roadbed is performed on two sides of the line of the foundation pit 2 before the step S3 of excavating the foundation pit 2 for installing the corresponding railroad track scale foundation pit and the whole track bed board, and the situation that the foundation pit 2 is displaced and locally deformed to cause the collapse of the foundation pit 2 in the excavation process of the foundation pit 2 can be avoided. Reducing the time for rework due to collapse of the foundation pit 2.
On the basis, there are various methods for reinforcing the roadbed at step S4 before the excavation of the foundation pit 2, such as a soil replacement method, a drainage consolidation method, a steel sheet piling method, and the like.
Specifically, the steel sheet piles are arranged along two sides of the foundation pit 2 at certain intervals, the size of the intervals is determined according to the actual soil conditions on site, and if softer soil conditions are met, the intervals of the steel sheet piles can be set to be smaller. If hard soil is encountered, the interval between the steel sheet piles can be set to be larger, and the method for driving the steel sheet piles does not need to separately manufacture the steel sheet piles, can be obtained in the market, reduces the time required for manufacturing the steel sheet piles, reduces the time for reinforcing the roadbed in the step S4, and further reduces the time for the construction period.
Specifically, referring to fig. 8, the construction method further includes:
step S5: and (5) reinforcing the line. Specifically, the step S5 is performed after the step S3 is performed to excavate the foundation pit 2 for installing the corresponding railroad track scale foundation pit and the monolithic track bed slab, and the line reinforcement is mainly located at two sides of the foundation pit 2. Step S5 is performed to erect the construction temporary beam.
If the step S5 of strengthening the line is not carried out, the construction temporary beam is directly erected, when a vehicle passes through the construction temporary beam, the load bearing capacity of the line under the construction temporary beam is not enough, the construction temporary beam is lowered, and even the risk of derailment of the vehicle occurs, if the load bearing capacity of soil is considered, the construction temporary beam is not erected, the line operation is caused, the line needs to be blocked for safety, once the line is blocked, the railway transportation of the whole section is influenced, and in order to solve the problem, the step S5 of strengthening the line is carried out on two sides of the line of the foundation pit 2.
On the basis, a plurality of methods for reinforcing the line are provided, wherein artificial dug piles are arranged on two sides of the line of the foundation pit 2, and the specific explanation is that the spacing positions of the artificial dug piles are determined according to actual conditions. The manual hole digging pile is used as a construction temporary beam to form a beam column system, so that the foundation of the existing track structure can be dragged and replaced, the track scale and the foundation pit 2 excavation work of the whole track bed can be implemented under the condition that the line operation is not influenced, and the influence on the line transportation of the whole section is avoided.
Actually, the prefabricated railroad track scale foundation 3 and the integral track bed slab 1 are assembled in a hoisting mode. Rings are pre-buried when the track scale foundation 3 and the integral track bed slab 1 are prefabricated, so that the rings for hoisting are integrated with the track scale foundation 3 and the integral track bed slab 1, and the safety factor of hoisting in the assembling process is improved.
It should be noted that the types, the number and the spacing distance of the lifting rings for lifting the track scale foundation 3 and the integral track bed plate 1 are not required, and the lifting rings for lifting the track scale foundation 3 and the integral track bed plate 1 may be the same or different, so long as the requirement that the track scale foundation 3 and the integral track bed plate 1 are successfully lifted is met.
In the process of line operation, the situation of jolting is possible to occur, the rest of passengers is influenced, in order to solve the situation of jolting, the method of pre-embedding the steel plate 31 in the prefabricated track scale foundation 3 and the prefabricated whole track bed plate 1 is adopted, as shown in fig. 3 and fig. 5, the track scale foundation 3 and the whole track bed plate 1 are connected with the weighing platform, so that the weighing platform can display whether the track scale foundation 3 and the track bed plate 1 are level with the ground or not, the steel plate 31 is pre-embedded in the prefabricated track scale foundation 3 and the whole track bed plate 1, and the track scale foundation 3 and the track bed plate 1 are leveled according to the result displayed by the weighing platform, so that the situation of jolting in the process of line operation is avoided.
It should be noted that various members for improving the strength and hardness of the track foundation 3 and the whole track bed slab 1 are pre-embedded in the process of prefabricating the track scale foundation 3 and the whole track bed slab 1.
In some embodiments, after the foundation pit 2 is backfilled and tamped, the surface of the foundation pit 2 has a manual hole digging pile for constructing a temporary line, and if the manual hole digging pile for constructing the temporary line is not removed, the line cannot be operated or the vehicle runs slowly, so that the manual hole digging pile for constructing the temporary line needs to be removed.
It should be noted that, if some manual hole digging piles are not easy to be completely removed, the manual hole digging piles can be knocked to enable the manual hole digging piles of the construction temporary beam to be below one meter of pile top, and normal operation of the line is not affected.
In some embodiments, after the foundation pit 2 is backfilled and tamped, subsequent processing is required, in order to facilitate hoisting or improve the hardness and strength of the whole, when the track scale foundation 3 and the whole track bed slab 1 are prefabricated, various components such as a lifting ring and a steel plate 31 are embedded, and after the foundation pit 2 is backfilled and tamped, parts such as the steel plate 31 and the lifting ring are exposed on a horizontal plane of the foundation pit 2 after backfilling and tamping, so that the flatness of the whole track is reduced, the normal operation of the line is affected, and therefore the parts such as the lifting ring and the steel plate 31 need to be removed to expose the plane part of the foundation pit 2 which is tamped and tamped, and the normal operation of the line is ensured.
In some embodiments, as shown in fig. 3 and 4, a drainage pipeline 21 is arranged in the process of excavating the foundation pit 2 for installing the corresponding railroad track scale foundation 3 and the integrated track slab 1, and then the foundation pit 2 is backfilled and tamped to be communicated with the drainage pipeline 21 to form a waterproof and drainage system, so that accumulated water generated in the process of line operation can be smoothly drained to a corresponding place along the drainage pipeline 21, such as a drainage ditch or a water seepage well, and the service life of the line is prolonged.
Specifically, as shown in fig. 3 and 4; the threading pipe 22 is arranged in the process of excavating the corresponding track scale foundation 3 and the whole track bed board 1, and the purpose of arranging the threading pipe 22 is to conduct signals between the grounding wire and the control room, so that the line can be normally operated.
The above description is only exemplary of the present invention and should not be construed as limiting the scope of the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A construction method of an assembled foundation pit, a rail weighbridge foundation and an integral ballast bed is characterized by comprising the following steps:
prefabricating a railroad track scale foundation, prefabricating an integral track bed board, and excavating a foundation pit for installing a corresponding railroad track scale foundation pit and the integral track bed board;
hoisting the prefabricated rail weighbridge foundation pit into the foundation pit; hoisting the integral ballast bed plate into the foundation pit of the prefabricated rail weighbridge foundation; and backfilling and tamping the foundation pit.
2. The method of claim 1, wherein prior to said excavating a pit for installing a corresponding railroad track scale pit and an integral ballast bed slab, the method further comprises:
and carrying out roadbed reinforcement on two sides of the line of the pre-excavated foundation pit.
3. The construction method according to claim 2, wherein the roadbed is reinforced by piling steel plate piles.
4. The construction method according to claim 2, wherein after the excavation of the foundation pit for installing the corresponding railroad track scale foundation pit and the integrated track bed slab, the construction method further comprises:
and reinforcing the lines on two sides of the line of the foundation pit, and erecting a construction temporary beam.
5. The method of claim 4, wherein the line is reinforced by forming artificial bored piles at intervals along the direction of extension of the line.
6. The construction method according to claim 5, wherein after the step of back-filling and tamping the foundation pit, the construction method further comprises: and dismantling the construction temporary beam and the manual hole digging pile.
7. The construction method according to claim 1, wherein in the step of prefabricating the railroad track scale foundation and the prefabricated monolithic track bed slab, further comprising: various components such as embedded steel bar hanging rings, steel plates and the like.
8. The construction method according to claim 7, wherein after the step of back-filling and tamping the foundation pit, the construction method further comprises: and removing the part of the hoisting ring reinforcing steel bar, which is exposed out of the plane of the foundation pit after the foundation pit is tamped.
9. The construction method according to claim 1, wherein the step of excavating a pit for installing a corresponding railroad track scale pit and an integral ballast bed slab further comprises: and arranging a waterproof and drainage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859682.1A CN113550184A (en) | 2021-07-28 | 2021-07-28 | Construction method of assembled foundation pit, rail weighbridge foundation and integral ballast bed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110859682.1A CN113550184A (en) | 2021-07-28 | 2021-07-28 | Construction method of assembled foundation pit, rail weighbridge foundation and integral ballast bed |
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| CN113550184A true CN113550184A (en) | 2021-10-26 |
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| CN202110859682.1A Pending CN113550184A (en) | 2021-07-28 | 2021-07-28 | Construction method of assembled foundation pit, rail weighbridge foundation and integral ballast bed |
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2021
- 2021-07-28 CN CN202110859682.1A patent/CN113550184A/en active Pending
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| US3562419A (en) * | 1967-12-21 | 1971-02-09 | Canada Iron Foundries Ltd | Inspection method and apparatus for track alignment |
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Application publication date: 20211026 |
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