A cantilever platform using prefabricated platform slab and construction method thereof

Abstract

The present invention provides a cantilever platform using prefabricated platform plates and a construction method thereof. The cantilever platform is constructed by casting cantilever platform beams, effectively solving the problem that the platform wall is easily cut and deformed during use of the traditional platform. The cantilever platform comprises a canopy foundation and a cantilever platform beam. The canopy foundation is provided with a canopy column, the upper end of the canopy column is connected to the bottom center position of the cantilever platform beam, and the canopy foundation, the canopy column and the cantilever platform beam are integrally cast in situ; the top of the cantilever platform beam is a plane, and the bottom surface of the cantilever platform beam extending from the center position to the left and right ends respectively is an inclined surface inclined upward; the top of the cantilever platform beam is paved with a prefabricated platform plate, and the left and right sides of the cantilever platform beam are respectively equipped with platform caps, and the platform cap is provided with an extension extending outward on the side close to the train track.

Description

Technical Field

[0001] The present invention relates to the technical field of station buildings, in particular to the technical field of high-speed railway train platforms, and specifically to a cantilever platform using prefabricated platform panels and a construction method thereof. Background Art

[0002] As we all know, the platform is an important part of the railway station building. The platform in the building is a platform for passengers to get on and off the train or load and unload goods. There are two types of passenger platforms and cargo platforms. The passenger platform is a structure set up for passengers to get on and off the train and load and unload luggage and mail. Traditional platforms have platform walls on the side close to the train track. The platform walls are often made of concrete or rough stone.

[0003] With the continuous development of railway transportation and the increasing passenger flow, higher requirements are placed on the safety and stability of platforms. In the construction and use of railway platforms, the problem of platform wall intrusion has always been a key problem that needs to be solved urgently. The traditional platform wall design and construction methods have gradually exposed many drawbacks in practical applications. On the one hand, due to the influence of various natural factors and train running vibration during the long-term use of the platform, the platform wall will have different degrees of displacement and deformation, causing it to gradually intrude into the safety limit of the train, posing a serious threat to the safe operation of the train. Once the platform wall intrusion occurs, it may not only damage the train body, but also easily cause major safety accidents such as train derailment, seriously endangering the lives and property of passengers. On the other hand, under the existing technical conditions, the detection and repair of platform wall intrusion is often difficult and costly. Traditional detection methods may have problems such as insufficient accuracy and long detection cycle, making it difficult to detect the early signs of platform wall intrusion in time, and thus unable to take effective preventive measures. Once the problem of intrusion is discovered, the repair work usually requires a lot of manpower, material resources and time, involving the demolition and reconstruction of the platform wall or large-scale reinforcement treatment, which will not only seriously affect the normal operation of the railway, but also bring a huge economic burden to the railway department. At the same time, the pipelines of the platform are pre-buried in the soil layer under the platform plate. When inspecting the pipelines, the platform plate needs to be dismantled, which is quite inconvenient. Therefore, it is urgent to develop a new platform form to solve a series of problems such as platform wall intrusion and high difficulty of platform maintenance, so as to ensure the safety and smoothness of railway transportation. Summary of the invention

[0004] The present invention provides a cantilever platform using a prefabricated platform plate and a construction method thereof. The cantilever platform is constructed by casting the cantilever platform beam, which effectively solves the problem that the platform wall is easily cut and deformed and intrudes into the limit during the use of the traditional platform.

[0005] The present invention is achieved through the following technical solutions:

[0006] A cantilever platform using a prefabricated platform plate, comprising a canopy foundation and a cantilever platform beam, wherein a canopy column is arranged on the canopy foundation, and the upper end of the canopy column is connected to the bottom center position of the cantilever platform beam, and the canopy foundation, the canopy column and the cantilever platform beam are integrally cast in situ;

[0007] The top of the cantilever platform beam is a plane, and the bottom of the cantilever platform beam extending from the center position to the left and right ends respectively is an inclined surface inclined upward;

[0008] A prefabricated platform plate is laid on the top of the cantilever platform beam, and platform caps are respectively installed on the left and right sides of the cantilever platform beam. The platform cap is provided with an extension portion extending outward on the side close to the train track.

[0009] Furthermore, a pipeline bracket for positioning and placing platform pipelines is fixed on the inclined surface at the bottom of the cantilevered platform beam.

[0010] Furthermore, a plurality of screw rods are pre-embedded on the cantilever platform beam, and a plurality of long holes for fitting with the screw rods are provided on the platform cap.

[0011] Furthermore, an assembly gap is reserved between the platform cap and the prefabricated platform plate, and a concrete block is installed in the assembly gap.

[0012] A method for constructing a cantilever platform using a prefabricated platform plate, the method comprising the following steps:

[0013] S01. Prefabricated platform plates, concrete blocks and platform caps are prefabricated in the factory, with screw holes processed on the prefabricated platform plates and long holes processed on the platform caps;

[0014] S02. Construct a foundation pit in the construction area according to the drawings and carry out foundation construction in the foundation pit;

[0015] S03. Cast the canopy foundation in the foundation pit, and cast the canopy column and cantilever platform beam at the same time. During the construction of the cantilever platform beam, embed multiple screws at the top of the cantilever platform beam;

[0016] S04. Lay a prefabricated platform slab on the top of the cantilever platform beam, and pass the screws embedded in the cantilever platform beam through the bolt holes reserved in the prefabricated platform slab;

[0017] S05. Lay platform caps on the left and right sides of the cantilever platform beam respectively, and pass the screws embedded in the cantilever platform beam through the long holes reserved in the platform caps;

[0018] When laying the platform cap, leave an assembly gap between the platform cap and the prefabricated platform slab;

[0019] S06. After the positions of the prefabricated platform plate and the platform cap are determined, the prefabricated platform plate and the platform cap are fastened to the screw rods with nuts;

[0020] After the precast platform slab and the platform cap are fixed, the assembly gap formed by the platform cap and the precast platform slab is filled with concrete blocks of appropriate size;

[0021] S07. Backfill the foundation pit with soil to make the left and right sides of the cantilever platform beam in a cantilevered state;

[0022] S08. Fix and install the pipeline bracket on the inclined surface at the bottom of the cantilever platform beam, position the platform pipeline on the pipeline bracket, and complete the platform construction;

[0023] S09. During the use of the platform, the distance between the platform cap and the train track is determined by measuring the limit size. When the distance is less than the critical value of the limit size, the nut corresponding to the platform cap is removed, the concrete block is taken out, and the platform cap is adjusted within the range of the long hole to move the platform cap to a suitable position, and the platform cap is fixed again with the nut;

[0024] When the platform cap is re-secured, the assembly gap formed between the platform cap and the precast platform slab is filled with concrete blocks of appropriate size.

[0025] Furthermore, in step S01, the prefabricated platform slab is cast by reinforced concrete.

[0026] Furthermore, in step S05, an assembly gap of 100-150 mm is reserved between the platform cap and the prefabricated platform plate.

[0027] Furthermore, in step S03, the pouring process includes the following steps:

[0028] S0301. First build the canopy foundation and the steel frame of the canopy column, assemble the canopy foundation formwork, and then cast the canopy foundation;

[0029] S0302. Tie the steel frame of the cantilever platform beam to the steel frame of the canopy column;

[0030] S0303. Synchronously assemble the formwork on the reinforcement frames of the canopy columns and cantilever platform beams, and then pour concrete to form the canopy columns and cantilever platform beams.

[0031] Furthermore, in step S05, the length of the long hole of the platform cap is 10-15 cm.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The cantilever platform is constructed by pouring cantilever platform beams. The cantilevered part of the cantilever platform beam is at a certain height from the ground, thereby reducing the impact of the vibration caused by the running of the train, and effectively solving the problem of platform wall cutting and deformation and limit intrusion during the use of traditional platforms. If limit intrusion occurs during operation and maintenance, the limit intrusion problem can be solved by adjusting the platform cap. Compared with the previous method of replacing and repairing the platform wall, not only the maintenance cost is low, but also the maintenance is convenient;

[0034] The cantilever platform construction method using prefabricated platform panels of the present invention can be used to construct the cantilever platform using prefabricated platform panels of the present invention, effectively solving the problem of the platform wall being easily cut and deformed during use, thereby improving the safety, maintainability and construction efficiency of the platform.

[0035] 2. A pipeline bracket is fixed on the inclined surface at the bottom of the cantilever platform beam. The platform pipeline is positioned and placed through the pipeline bracket, which changes the previous method of burying the platform pipeline in the soil layer and facilitates maintenance;

[0036] 3. Multiple screws are pre-buried on the cantilever platform beam. This design makes it easy to fix the platform cap and the cantilever platform beam, and to disassemble, adjust and replace the platform cap during later maintenance, thereby improving work efficiency.

[0037] 4. The prefabricated platform slab is cast with reinforced concrete, which avoids the problems of platform surface sinking, bulging and warping. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the cantilever platform of the present invention;

[0039] Figure 2 for Figure 1 A schematic diagram of the enlarged structure in the middle;

[0040] Figure 3 It is a top view of the platform cap assembly of the present invention;

[0041] In the figure: 1. Canopy foundation, 2. Canopy column, 3. Cantilevered platform beam, 4. Prefabricated platform slab, 5. Platform cap, 6. Concrete block, 7. Canopy, 8. Screw, 9. Nut, 10. Long hole, 11. Pipeline bracket. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0043] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or coupling. The term "and / or" used herein includes any unit and all combinations of one or more associated listed items.

[0044] In the prior art, when constructing a platform, the canopy foundation is often poured in the foundation pit, and then the canopy columns are poured. The platform wall is installed on the side close to the train track, and soil is filled into the foundation pit to form a soil layer. During this process, the platform pipelines are buried, and then the platform slab is laid on the top surface of the soil layer. During the operation and maintenance of the platform wall, due to factors such as the lateral soil pressure of the backfill soil and the vibration caused by the train passing the train track, the platform wall is intruded. When the intrusion problem occurs, the platform wall needs to be repaired, which brings inconvenience to the train operation. At the same time, the platform pipelines are underground, and maintenance is very inconvenient.

[0045] In order to solve the above technical problems, this embodiment discloses a cantilever platform using a prefabricated platform plate, such as Figure 1-Figure 3 As shown, it mainly includes structures such as a canopy foundation 1, a cantilever platform beam 3, a prefabricated platform plate 4, a concrete block 6 and a platform cap 5. The canopy foundation 1 is cast in the foundation pit, and a canopy column 2 is set on the canopy foundation 1. The upper end of the canopy column 2 is connected to the bottom center position of the cantilever platform beam 3. The canopy foundation 1, the canopy column 2 and the cantilever platform beam 3 are cast in situ by integral casting, thereby ensuring that the canopy foundation 1, the canopy column 2 and the cantilever platform beam 3 are an integrated structure, which is more solid and firm as a whole. The left and right sides of the cantilever platform beam 3 are symmetrically distributed, the top of the cantilever platform beam 3 is a plane, and the bottom of the cantilever platform beam 3 extends from the center position to the left and right ends respectively. The bottom surface is an inclined surface that is inclined upward, so that the left and right sides of the cantilever platform beam 3 have a variable cross-section trend. The cantilever platform beam 3 needs to be pre-buried with multiple screws 8 before casting, which is convenient for subsequent connection with the platform cap 5 and the prefabricated platform plate 4.

[0046] A prefabricated platform plate 4 is laid on the top of the cantilever platform beam 3. The prefabricated platform plate 4 is prefabricated in advance. Its size is determined according to the actual situation such as the span. Considering the passage of passengers, its thickness is generally 150~200mm, and it is cast with reinforced concrete, which avoids the problem of platform surface sinking, bulging and warping. In addition, bolt holes are reserved during the manufacturing process to facilitate the connection with the screw rod 8 of the cantilever platform beam 3. When laying the prefabricated platform plate 4, it is necessary to reserve a certain space on the left and right sides of the cantilever platform beam 3 to lay and install the platform cap 5. The left and right sides of the cantilever platform beam 3 are respectively equipped with the platform cap 5, which is also prefabricated in advance. The platform cap 5 is processed with an extension extending outward on the side close to the train track. A plurality of long holes 10 are reserved on the platform cap 5. The length of the long hole 10 is 10cm. The platform cap 5 is fixedly installed by cooperating with the screw rod 8 of the cantilever platform beam 3. An assembly gap of about 100-150 mm is reserved between the platform cap 5 and the prefabricated platform plate 4 , and a concrete block 6 is installed in the assembly gap.

[0047] In order to construct the cantilever platform using the prefabricated platform slab, the present embodiment further discloses a cantilever platform construction method using the prefabricated platform slab, which comprises the following steps:

[0048] S01. Prefabricate the prefabricated platform plate 4, platform cap 5 and concrete block 6 to be used in the factory. The length and height of the concrete block 6 are consistent with the prefabricated platform plate 4. The prefabricated platform plate is cast with reinforced concrete. Bolt holes are processed on the prefabricated platform plate 4, and long holes 10 are processed on the platform cap 5.

[0049] S02. Construct a foundation pit in the construction area according to the drawings and carry out foundation construction in the foundation pit;

[0050] S03, pouring the canopy foundation 1 in the foundation pit, and pouring the canopy column 2 and the cantilever platform beam 3 at the same time. During the construction of the cantilever platform beam 3, a plurality of screws 8 are pre-buried at the top of the cantilever platform beam 3;

[0051] The pouring process includes the following steps:

[0052] S0301. First build the canopy foundation and the steel frame of the canopy column, assemble the canopy foundation formwork, and then cast the canopy foundation;

[0053] S0302. Tie the steel frame of the cantilever platform beam to the steel frame of the canopy column;

[0054] S0303. Synchronously assemble the formwork on the steel bars of the canopy columns and the cantilevered platform beams, and then pour concrete to form the canopy columns and the cantilevered platform beams;

[0055] S04, laying the prefabricated platform plate 4 on the top of the cantilever platform beam 3, and passing the screw rod 8 embedded in the cantilever platform beam 3 through the bolt hole reserved in the prefabricated platform plate 4;

[0056] S05, laying platform caps 5 on the left and right sides of the cantilever platform beam 3 respectively, and passing the screws 8 embedded in the cantilever platform beam 3 through the long holes reserved in the platform caps 5;

[0057] When laying the platform cap 5, a 100mm assembly gap is reserved between the platform cap 5 and the prefabricated platform plate 4 to facilitate the subsequent laying of the concrete block 6;

[0058] S06, after the positions of the prefabricated platform plate 4 and the platform cap 5 are determined, the prefabricated platform plate 4 and the platform cap 5 are fastened to the screw rod 8 with nuts 9;

[0059] After the prefabricated platform slab 4 and the platform cap 5 are fixed, the assembly gap formed by the platform cap 5 and the prefabricated platform slab 4 is filled with concrete blocks 6 of appropriate size;

[0060] S07. Backfill the foundation pit with soil to make the left and right sides of the cantilever platform beam in a cantilevered state;

[0061] S08, fixing and installing the pipeline support 11 on the inclined surface at the bottom of the cantilever platform beam, positioning and placing the platform pipeline on the pipeline support 11, and completing the platform construction;

[0062] In this embodiment, the pipeline support adopts expansion bolts to achieve fixed connection with the cantilever platform beam, and the pipeline support adopts a bracket welded from waste steel bars on the construction site;

[0063] S09. During the use of the platform, the distance between the platform cap and the train track is determined by measuring the limit size. When the distance is less than the critical value of the limit size, the nut corresponding to the platform cap is removed, the concrete block is taken out, and the platform cap is adjusted within the range of the long hole to move the platform cap to a suitable position, and the platform cap is fixed again with the nut;

[0064] When the platform cap is re-secured, the assembly gap formed between the platform cap and the precast platform slab is filled with concrete blocks of appropriate size.

[0065] Through this embodiment, a cantilever platform using prefabricated platform plates and a construction method thereof are provided. The cantilever platform is constructed by casting cantilever platform beams. The cantilevered portion of the cantilever platform beams is at a certain height from the ground, thereby reducing the impact of vibration caused by the movement of trains, and effectively solving the problem of platform wall cutting and deformation and limit intrusion during the use of traditional platforms. If limit intrusion occurs during operation and maintenance, the limit intrusion problem can be solved by adjusting the position of the platform cap. Compared with the previous method of replacing and repairing the platform wall, not only is the maintenance cost low, but the maintenance is also convenient.

Claims

1. A cantilever platform using prefabricated platform panels, characterized in that: It includes a canopy foundation and a cantilever platform beam, wherein a canopy column is arranged on the canopy foundation, and the upper end of the canopy column is connected to the bottom center position of the cantilever platform beam, and the canopy foundation, the canopy column and the cantilever platform beam are integrally cast in situ; The top of the cantilever platform beam is a plane, and the bottom of the cantilever platform beam extending from the center position to the left and right ends respectively is an inclined surface inclined upward; A prefabricated platform plate is laid on the top of the cantilever platform beam, and platform caps are respectively installed on the left and right sides of the cantilever platform beam, and the platform cap is provided with an extension portion extending outward on the side close to the train track; A plurality of screw rods are embedded in the cantilever platform beam, a plurality of long holes for mounting with the screw rods are provided on the platform cap, an assembly gap is reserved between the platform cap and the prefabricated platform plate, and a concrete block is installed in the assembly gap.

2. The cantilever platform according to claim 1, characterized in that: A pipeline bracket for positioning and placing platform pipelines is fixed on the inclined surface at the bottom of the cantilevered platform beam.

3. A cantilever platform construction method using prefabricated platform panels, characterized in that: The construction of the cantilever platform using the prefabricated platform slab as claimed in claim 1 comprises the following steps: S01. Prefabricated platform plates, concrete blocks and platform caps are prefabricated in the factory, with screw holes processed on the prefabricated platform plates and long holes processed on the platform caps; S02. Construct a foundation pit in the construction area according to the drawings and carry out foundation construction in the foundation pit; S03. Cast the canopy foundation in the foundation pit, and cast the canopy column and cantilever platform beam at the same time. During the construction of the cantilever platform beam, embed multiple screws at the top of the cantilever platform beam; S04. Lay a prefabricated platform slab on the top of the cantilever platform beam, and pass the screws embedded in the cantilever platform beam through the bolt holes reserved in the prefabricated platform slab; S05. Lay platform caps on the left and right sides of the cantilever platform beam respectively, and pass the screws embedded in the cantilever platform beam through the long holes reserved in the platform caps; When laying the platform cap, leave an assembly gap between the platform cap and the prefabricated platform slab; S06. After the positions of the prefabricated platform plate and the platform cap are determined, the prefabricated platform plate and the platform cap are fastened to the screw rods with nuts; After the precast platform slab and the platform cap are fixed, the assembly gap formed by the platform cap and the precast platform slab is filled with concrete blocks of appropriate size; S07. Backfill the foundation pit with soil to make the left and right sides of the cantilever platform beam in a cantilevered state; S08. Fix and install the pipeline bracket on the inclined surface at the bottom of the cantilever platform beam, position the platform pipeline on the pipeline bracket, and complete the platform construction; S09. During the use of the platform, the distance between the platform cap and the train track is determined by measuring the limit size. When the distance is less than the critical value of the limit size, the nut corresponding to the platform cap is removed, the concrete block is taken out, and the platform cap is adjusted within the range of the long hole to move the platform cap to a suitable position, and the platform cap is fixed again with the nut; When the platform cap is re-secured, the assembly gap formed between the platform cap and the precast platform slab is filled with concrete blocks of appropriate size.

4. The cantilever platform construction method according to claim 3, characterized in that: In step S01, the prefabricated platform slab is cast by using reinforced concrete.

5. The cantilever platform construction method according to claim 3, characterized in that: In step S05, an assembly gap of 100-150 mm is reserved between the platform cap and the prefabricated platform plate.

6. The cantilever platform construction method according to claim 3, characterized in that: In step S03, the pouring process includes the following steps: S0301. First build the canopy foundation and the steel frame of the canopy column, assemble the canopy foundation formwork, and then cast the canopy foundation; S0302. Tie the steel frame of the cantilever platform beam to the steel frame of the canopy column; S0303. Synchronously assemble the formwork on the reinforcement frames of the canopy columns and cantilever platform beams, and then pour concrete to form the canopy columns and cantilever platform beams.

7. The cantilever platform construction method according to any one of claims 3 to 6, characterized in that: In step S05, the length of the long hole of the platform cap is 10-15 cm.

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