Electromagnetic in-place special-shaped intermediate floor assembly construction method for underground station of urban railway

Abstract

The application discloses a city area railway underground station electromagnetic positioning type special-shaped middle floor assembly construction method, and construction steps are as follows: 1, prefabricating middle floors and all prefabricated structures; magnetic points are arranged on the side wall of each prefabricated structure near the lower end position on the side away from the platform, and the corresponding long side wall of the track top air duct near the lower end position on the side away from the platform; 2, electromagnetic force exciting devices are arranged below and / or on the side of the position where each prefabricated structure needs to be arranged; 3, each prefabricated structure is hoisted and fixed in position through the corresponding electromagnetic force exciting device; 4, the middle floor is hoisted and installed; 5, the middle floor and each prefabricated structure are fixed into a whole; and 6, all electromagnetic force exciting devices are removed. The application can avoid the defects of the cast-in-place method in the prior art, can realize simplification of the special-shaped floor, industrialized rapid installation, energy saving and environmental protection, and is more in line with the trend of green and low-carbon transformation in the city area railway construction field.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field, in particular to a city railway underground station electromagnetic in-place type special-shaped middle floor assembly construction method. BACKGROUND

[0002] The city railway is a public transport, large capacity and fast rail transit system connecting the center city and surrounding towns in the metropolitan area, and is an important part of the urban comprehensive transportation system. It is currently in a period of rapid development.

[0003] The city railway underground station is generally a two-story underground structure, and the open excavation method is generally used for the foundation pit. The main structure is generally a cast-in-place reinforced concrete structure. In order to meet the requirements of ventilation and heat dissipation, a track top air duct made of reinforced concrete is provided below the middle floor of the city railway underground station.

[0004] In order to meet the requirements of traditional construction process, the track top air duct suspended and connected below the middle floor can be constructed only after the middle floor construction is completed and the formwork and support are removed. Since they are both cast-in-place reinforced concrete, the structure composed of the middle floor and the track top air duct poured in sequence can be considered as a special-shaped middle floor. When the track top air duct is constructed, not only does it need to re-erect formwork and support, but also the construction personnel need to work in the narrow space of less than 1m between the middle floor and the track top air duct throughout the process, which is difficult. In addition, it is difficult to pour dense new and old concrete at the joint of the newly poured concrete below the already constructed structure, which is difficult to guarantee the construction quality and has hidden dangers of structural safety and durability.

[0005] In fact, since the construction site of the city railway station generally has sufficient land for construction, it is convenient to make prefabricated components nearby. Among them, the middle floor and the track top air duct connected thereto are suitable for prefabricated assembly technology due to small load bearing, light component weight, standardization and other reasons, but there is a lack of convenient and reliable construction method in actual engineering construction.

[0006] Therefore, for the structure composed of the middle floor and the track top air duct in the city railway underground station, the traditional cast-in-place reinforced concrete production method currently adopted has not only great construction difficulty, but also hidden dangers of structural safety and durability. Therefore, it is necessary to continue to develop a reliable and convenient reinforced concrete assembly construction method. SUMMARY

[0007] In view of the above defects of the prior art, the present application provides a city railway underground station electromagnetic in-place type special-shaped middle floor assembly construction method, which avoids the defects of the prior art cast-in-place method construction, simplifies the special-shaped floor, realizes industrialized rapid installation, saves energy and protects the environment, and is more in line with the trend of green and low-carbon transformation in the field of city railway construction.

[0008] In order to achieve the above-mentioned purpose, the application discloses a method for assembling a special-shaped middle floor of a city railway station by using electromagnetic positioning, wherein the city railway station comprises a middle floor; a rail top air duct is arranged below the middle floor corresponding to the position of each passing vehicle; a rail top air duct long side wall extending downward along the side wall is arranged on one side of the rail top air duct facing the platform; the air duct side wall on both sides of the rail top air duct, the air duct bottom plate at the bottom and the rail top air duct long side wall are a prefabricated structure as a whole; and the construction steps are as follows:

[0009] Step 1: prefabricating the middle floor and splicing each prefabricated structure below the middle floor;

[0010] In the prefabrication process, the air duct side wall on the side away from the platform of each prefabricated structure is arranged close to the lower end position, and the rail top air duct long side wall on the side away from the platform is arranged close to the lower end position.

[0011] Step 2: arranging the electromagnetic force exciting device below and / or on the side of the position where each prefabricated structure needs to be arranged;

[0012] Step 3: hoisting each prefabricated structure and fixing it in position by adsorbing the corresponding magnetic force point through the corresponding electromagnetic force exciting device;

[0013] Step 4: hoisting and installing the middle floor;

[0014] Step 5: fixing the middle floor and each prefabricated structure into a whole;

[0015] Step 6: removing all the electromagnetic force exciting devices.

[0016] Preferably, the two ends of the middle floor are respectively placed in the notches of the horizontal frame beams of the side walls of the city railway station and the notches of the longitudinal frame beams of the city railway station.

[0017] Preferably, in step 1, corrugated pipes capable of passing and pulling prestressed tendons are pre-buried in the middle floor and the prefabricated structure;

[0018] In step 5, the middle floor and each prefabricated structure are reliably pulled and locked to form a whole by passing and pulling prestressed tendons in the corrugated pipes of the middle floor and each prefabricated structure and performing vertical tensioning.

[0019] The application has the following beneficial effects:

[0020] The application of this invention can avoid the defects of the existing cast-in-place construction method, simplify the construction of irregular floor slabs, enable rapid industrial installation, save energy and protect the environment, and better meet the trend of green and low-carbon transformation in the field of urban railway construction.

[0021] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0022] Figure 1 This diagram shows a cross-sectional structure of a suburban railway station after all construction work has been completed, according to an embodiment of the present invention.

[0023] Figure 2 This diagram shows a partial state of the electromagnetic force excitation device in one embodiment of the present invention.

[0024] Figure 3 This diagram shows a partial view of the prefabricated structure being hoisted in one embodiment of the present invention.

[0025] Figure 4 This diagram shows a partial view of the completed mid-floor slab hoisting process in one embodiment of the present invention.

[0026] Figure 5 This diagram illustrates a partial state of prestressed tendon tensioning in one embodiment of the present invention.

[0027] Figure 6 This diagram shows a partial state of the electromagnetic force excitation device after dismantling in one embodiment of the present invention. Detailed Implementation

[0028] Example

[0029] like Figures 1 to 6 As shown, the electromagnetic positioning method for assembling irregularly shaped intermediate floor slabs in an underground suburban railway station is described. The suburban railway station includes an intermediate floor slab 1; a rail-top ventilation duct 2 is provided below the intermediate floor slab 1 corresponding to the position of each passing vehicle; a long side wall 3 extending downwards along the side wall of the rail-top ventilation duct 2 facing the platform 8 is provided; the ventilation duct side walls 4 on both sides of the rail-top ventilation duct 2, the bottom ventilation duct base slab 5, and the long side wall 3 of the rail-top ventilation duct are prefabricated structures as a whole; the construction steps are as follows:

[0030] Step 1: Precast intermediate floor slab 1, and each precast structure spliced ​​under intermediate floor slab 1;

[0031] During the prefabrication process, each prefabricated structure has magnetic points that can be attracted and fixed by the electromagnetic force excitation device 7 near the lower end of the air duct sidewall 4 on the side away from the platform 8 and the corresponding rail top air duct long sidewall 3 on the side away from the platform 8 near the lower end.

[0032] Step 2, set electromagnetic force excitation devices 7 under and / or beside each position where a prefabricated structure is to be set;

[0033] Step 3, hoist each prefabricated structure and fix it in place by adsorbing the corresponding magnetic force point through the corresponding electromagnetic force excitation device 7;

[0034] Step 4, hoist and install the intermediate floor 1;

[0035] Step 5, fix the intermediate floor 1 and each prefabricated structure into a whole;

[0036] Step 6, remove all electromagnetic force excitation devices 7.

[0037] The intermediate floor 1 in the present application, as well as the prefabricated structure form of the air duct side wall 4 on both sides of the rail-top air duct 2, the air duct bottom plate 5 at the bottom, and the long side wall 3 of the rail-top air duct, is regular in form and simple in structure, which is more convenient for standard component manufacturing and can be constructed mechanically on site without the need for a large number of construction personnel to repeatedly set up forms, supports, and steel bar binding.

[0038] The present application breaks the conventional sequence of "first up and then down" for the intermediate floor 1 and the rail-top air duct 2, and the construction process has an open view and is convenient to install.

[0039] The present application uses corresponding electromagnetic force excitation devices 7 to adsorb the magnetic force points of the corresponding prefabricated structures for fixation in place during the construction stage, and the installation position and the size of the load can be controlled in real time and digitally, which not only effectively improves the construction precision, but also avoids the use of diesel-powered crawler cranes for repeated weight adjustment, thereby reducing carbon emissions.

[0040] In some embodiments, the two ends of the intermediate floor 1 are respectively placed in the notches of the horizontal frame beam 10 of the side wall 9 of the suburban railway station and the longitudinal frame beam 11 of the suburban railway station.

[0041] In some embodiments, in step 1, corrugated pipes capable of passing and tensioning the prestressed beam 6 are pre-buried in the intermediate floor 1 and the prefabricated structure;

[0042] In step 5, the intermediate floor 1 and each prefabricated structure are reliably tensioned and locked to form a whole by passing and tensioning the prestressed beam 6 in the corrugated pipes of the intermediate floor 1 and each prefabricated structure and performing vertical tensioning.

[0043] The intermediate floor 1 and the rail-top air duct 2 in the present application are tensioned and locked into a whole by the prestressed beam 6, which not only has a safe and reliable structure and good durability, but also can minimize the risk of air leakage at the joint between the rail-top air duct 2 and the intermediate floor 1, which is conducive to the control of the temperature and the riding environment inside the station during operation.

[0044] The preferred embodiments of the present application have been described above in detail. It should be understood that modifications and variations to the preferred embodiments could be made by those skilled in the art in light of the teachings above without departing from the spirit of the present application. It is therefore to be understood that what is desired to be protected by letters patent is defined by the scope of the claims that follow and that on behalf of which the summary of the application is intended to serve.

Claims

1. A method for assembling a floor of a metro railway underground station by electromagnetic positioning of a special-shaped floor; characterized in that, The city railway station includes a middle floor (1), the middle floor (1) is provided with a rail top air duct (2) corresponding to the position of each passing vehicle, the rail top air duct (2) is provided with a rail top air duct long side wall (3) extending downward along the side wall on the side of the platform (8), the air duct side wall (4) on both sides of the rail top air duct (2), the air duct bottom plate (5) at the bottom and the rail top air duct long side wall (3) are a whole prefabricated structure, and the construction steps are as follows: Step 1, prefabricate the middle floor (1) and splice each prefabricated structure under the middle floor (1); In the prefabrication process, the air duct side wall (4) on the side away from the platform (8) of each prefabricated structure is close to the lower end position, and the corresponding rail top air duct long side wall (3) away from the platform (8) is close to the lower end position, and the magnetic force point can be adsorbed and fixed by the electromagnetic force exciting device (7); Step 2, the electromagnetic force exciting device (7) is arranged below and / or on the side of the position where each prefabricated structure is arranged; Step 3, hoist each prefabricated structure and fix it in place by adsorbing the corresponding magnetic force point through the corresponding electromagnetic force exciting device (7); Step 4, hoist and install the middle floor (1); Step 5, fix the middle floor (1) and each prefabricated structure into a whole; Step 6, remove all electromagnetic force exciting devices (7).

2. The electromagnetic positioning method for the special-shaped floor assembly construction of the underground station of the suburban railway according to claim 1, characterized in that, The two ends of the middle floor (1) are respectively placed in the notches of the horizontal frame beam (10) of the side wall (9) of the city railway station and the longitudinal frame beam (11) of the city railway station.

3. The electromagnetic positioning method for the special-shaped floor assembly construction of the underground station of the metropolitan railway according to claim 1, characterized in that, In step 1, the corrugated pipe capable of passing and pulling the prestressed beam (6) is pre-buried in the middle floor (1) and the prefabricated structure; In step 5, the middle floor (1) and each prefabricated structure are reliably tensioned and locked to form a whole by passing and pulling the prestressed beam (6) in the corrugated pipe of the middle floor (1) and each prefabricated structure and performing vertical tensioning.

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