Method for escalator to pass through seismic isolation layer

Abstract

The present invention belongs to the field of building engineering technology, and relates to a method for an escalator to pass through a seismic isolation layer, comprising: an escalator, an upper seismic isolation layer, and a lower non-seismic isolation layer, wherein the upper outlet of the escalator is connected to the upper seismic isolation layer, and the lower outlet of the escalator is connected to the lower non-seismic isolation layer, the upper outlet of the escalator is rigidly connected to the upper seismic isolation layer, and the lower outlet of the escalator is horizontally slidably connected to the lower non-seismic isolation layer, and a base is provided at the bottom of the escalator, and a pit is provided at the lower non-seismic isolation layer, and a non-rigid horizontally slidable connection between the base and the pit is provided, so that the escalator as a whole follows the synchronous displacement of the upper seismic isolation layer at the upper outlet of the escalator to generate horizontal displacement during an earthquake, and a vibration isolation joint is provided between the base and the bottom box, so that the horizontal displacement generated during an earthquake will not affect the connection at the lower outlet of the escalator, and thus will not affect the entire escalator, thereby ensuring the safety of the overall structure of the escalator passing through the seismic isolation layer during an earthquake.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering and relates to a method for an escalator to pass through a seismic isolation layer. Background Art

[0002] In recent years, more and more new buildings or renovations of existing buildings have adopted seismic isolation technology to improve the seismic performance of the structure, and have achieved very good seismic resistance. Because seismic isolation buildings are equipped with a relatively soft seismic isolation layer, while being able to isolate the effects of earthquakes, they will also produce large horizontal displacements under the action of earthquakes. Especially under the action of rare earthquakes, the horizontal displacement often reaches 400-600mm, which poses a great challenge to the transportation facilities that pass through the seismic isolation layer. To this end, engineering and technical personnel have continuously proposed various solutions in engineering practice to deal with it. In real life, most buildings that use seismic isolation technology are schools or hospitals, and schools rarely have escalators, and hospitals rarely have escalators that pass through the seismic isolation layer to the bottom of the seismic isolation layer. Therefore, the existing technology of escalators passing through the seismic isolation layer is relatively simple, and the application conditions are more restricted. Figure 1 The figure in the middle shows the method of escalator passing through the seismic isolation layer in the prior art. The basic idea is that a non-seismic isolation platform raised by a non-seismic isolation layer is provided at the higher end of the escalator. The escalator is placed on the non-seismic isolation platform. The non-seismic isolation platform of the escalator is then connected to the seismic isolation upper main structure by overlapping across the seismic isolation trench using plate overlap.

[0003] Therefore, although the existing technical solution of escalators passing through seismic isolation layers is relatively simple and easy to implement, it has obvious disadvantages, which restricts its application scenarios. The main disadvantages are as follows:

[0004] 1. The existing escalator through the isolation layer plan must set up an escalator platform rising from the non-isolation area. When the area below the isolation layer is also a public space, the escalator platform and its columns will occupy a large building space, which is rather abrupt and affects the use function of the building space and the aesthetic effect of the interior.

[0005] 2. Escalators in modern buildings are often arranged in a cross-close arrangement to facilitate pedestrian transfers and thus reach different floors. In the existing escalator crossing the seismic isolation layer, the escalator itself is supported on the non-seismic isolation area and ascends to the elevation of the seismic isolation layer. To avoid collision, a 400-600mm seismic isolation deformation joint must be set between the high space of the escalator upward port and the seismic isolation layer. The existence of the high deformation joint makes it very difficult to cross the escalator, which is inconvenient to use and creates a great safety hazard.

[0006] 3. When the escalator passes through 2 floors or more, the escalator platform must also be raised accordingly, which not only seriously affects the building effect, but also makes it difficult to ensure structural safety due to its narrow and high characteristics.

[0007] Therefore, a method is needed to solve this problem by using an escalator that saves more space, is safer and more convenient to pass through the seismic isolation layer and connect the upper seismic isolation layer with the lower non-seismic isolation layer. Summary of the invention

[0008] The technical solution adopted by the present invention to solve the technical problem is: a method for an escalator to pass through a seismic isolation layer, comprising the following steps:

[0009] Step 1: According to actual needs, determine the upper exit position of the escalator at the upper isolation layer and the lower exit position at the lower non-isolation layer, and determine that an isolation layer is set between the upper isolation layer and the lower non-isolation layer. The isolation layer can isolate the earthquake action, but also cause the upper isolation layer to produce a large horizontal displacement relative to the lower non-isolation layer under the action of the earthquake;

[0010] Step 2: Determine the size, thickness and material of the rectangular base fixedly connected at the bottom of the lower exit of the escalator according to the lifting height, inclination angle, rated speed and step width of the escalator;

[0011] Step 3: According to the size of the base in step 2, a rectangular trough-shaped pit is set at the lower non-seismic isolation layer at the lower exit of the escalator;

[0012] Step 4: Select a horizontally slidable device according to the size of the base and the pit, and ensure that the horizontally slidable device can be placed horizontally at the bottom of the pit and support the bottom of the base above it;

[0013] Step 5: Place the base in the pit, and fix the fixed part and the sliding part of the horizontally slidable device to the bottom of the base and the bottom of the pit respectively, and ensure that vibration isolation gaps are provided between the surrounding side walls of the base and the corresponding side walls of the pit respectively;

[0014] Step 6: Set a sliding cover plate at the lower exit of the escalator to slide and overlap the lower non-seismic isolation layer and the escalator;

[0015] Step 7: Rigidly connect the upper exit of the escalator to the upper seismic isolation layer;

[0016] When an earthquake occurs, a large horizontal displacement occurs between the upper seismic isolation layer and the lower non-seismic isolation layer. Since the upper exit of the escalator is rigidly connected to the upper seismic isolation layer, the escalator and the upper seismic isolation layer produce synchronous horizontal displacement, that is, a large horizontal displacement occurs between the escalator and the lower non-seismic isolation layer. At this time, since the escalator only connects to the lower non-seismic isolation layer through a horizontally sliding device at the lower exit, the horizontal displacement caused by the earthquake is concentrated at the lower exit of the escalator. During the displacement, the base at the bottom of the lower exit of the escalator and the bottom pit at the lower non-seismic isolation layer produce relative horizontal sliding through the horizontally sliding device. Due to the spacing isolation of the vibration isolation joints, the horizontal displacement caused by the earthquake will not affect the connection at the lower exit of the escalator, and then will not affect the entire escalator, thereby ensuring the safety of the overall structure of the escalator passing through the seismic isolation layer during an earthquake.

[0017] Preferably, the base in step 2 is a steel structure trough, and the lower outlet of the escalator is fixedly connected to the trough bottom and / or trough side wall of the base; the trough-shaped steel structure base ensures that the base can serve as the foundation of the escalator, providing good supporting conditions and at the same time having the ability to prevent the escalator from overturning.

[0018] Preferably, the horizontally slidable device in step 4 includes rollers, rollers, and a slide plate.

[0019] More preferably, the slide plate is a rectangular polytetrafluoroethylene plate, and a single horizontal surface of the polytetrafluoroethylene plate is fixedly connected to the bottom surface of the base or the bottom surface of the pit; since polytetrafluoroethylene has high strength, toughness, corrosion resistance and self-lubrication, when the bottom surface of the polytetrafluoroethylene plate is fixed to the bottom surface of the pit, its upper surface can be used to place the base and provide good horizontal sliding properties for the base during an earthquake, preventing the relative displacement of the lower non-seismic isolation layer from affecting the rigid destruction of the bottom of the escalator. Similarly, the upper surface of the polytetrafluoroethylene plate is fixed to the base, and its bottom surface has good horizontal sliding properties with the bottom surface of the pit, which can also prevent the displacement of the lower non-seismic isolation layer from affecting the rigid destruction of the bottom of the escalator.

[0020] Preferably, in step five, the width of the vibration isolation joint is not less than 600 mm; a vibration isolation joint greater than 600 mm can effectively isolate most of the horizontal displacement caused by earthquakes.

[0021] Preferably, in step five, a fixing rod is horizontally arranged at the vibration isolation joint, and both ends of the fixing rod are respectively fixedly connected to the base and the bottom pit, and the fixing rod is made of a brittle material; the fixing rod usually serves to fix the base to provide rigid support for the entire escalator, and under the action of small external forces such as stretching, impact and other deformations during an earthquake, damage and fracture may occur, thereby preventing the deformation of the lower non-seismic isolation layer during an earthquake from causing a rigid impact on the base, thereby ensuring the safety of the overall structure of the escalator passing through the seismic isolation layer during an earthquake.

[0022] More preferably, the brittle material includes glass or ceramic.

[0023] More preferably, the fixing rod is provided with a stress breaking section, the cross-sectional area of ​​which is smaller than the cross-sectional area of ​​other parts of the fixing rod; under the action of a small external force during an earthquake, such as stretching, impact and other deformations, the weak part of the stress breaking section can be broken and fractured, thereby ensuring the earthquake sensitivity of the fixing rod. The beneficial effects of the present invention are:

[0024] The present invention provides a base at the bottom of the escalator, and a pit at the lower non-seismic isolation layer, and a non-rigid horizontally slidable connection method between the base and the pit, so that the escalator as a whole follows the synchronous displacement of the upper seismic isolation layer at the upper exit of the escalator to produce horizontal displacement during an earthquake, and a vibration isolation joint is provided between the base and the bottom box, so that the horizontal displacement produced during an earthquake will not affect the connection at the lower exit of the escalator, and further will not affect the entire escalator, thereby ensuring the safety of the overall structure of the escalator passing through the seismic isolation layer during an earthquake; the present invention has the advantages of not needing to build an escalator platform rising from the non-seismic isolation area, and not needing to set a large isolation deformation joint in the high space at the upper exit of the escalator, so the method of the escalator passing through the seismic isolation layer of the present invention is simple to lay out, has a good indoor seismic isolation effect, and has a safer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a prior art scheme diagram of a method for an escalator to pass through a seismic isolation layer;

[0026] Figure 2 It is a front view;

[0027] Figure 3 This is a partial enlarged view of the escalator lower exit;

[0028] Figure 4 yes Figure 3 A partial enlarged view of the A direction;

[0029] Figure 5 yes Figure 3 Explosion diagram of the explosion.

[0030] In the figure: 1. escalator; 2. upper isolation layer; 3. lower non-isolation layer; 4. base; 5. pit; 6. horizontal sliding device; 7. isolation joint; 8. sliding cover; 9. fixing rod; 10. stress failure section. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technologies in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] refer to Figures 1 to 5 , a method for an escalator to pass through a seismic isolation layer, comprising the following steps:

[0033] Step 1: According to actual needs, determine the upper exit position of the escalator 1 at the upper seismic isolation layer 2 and the lower exit position at the lower non-seismic isolation layer 3, and determine that a seismic isolation layer is provided between the upper seismic isolation layer 2 and the lower non-seismic isolation layer 3. The seismic isolation layer can isolate the seismic effect, but also causes the upper seismic isolation layer 2 to produce a large horizontal displacement relative to the lower non-seismic isolation layer 3 under the action of the earthquake;

[0034] Step 2: Determine the size, thickness and material of the rectangular base 4 fixedly connected at the bottom of the lower exit of the escalator 1 according to the lifting height, inclination angle, rated speed and step width of the escalator 1;

[0035] Step 3: According to the size of the base 4 in step 2, a rectangular groove-shaped bottom pit 5 is set at the lower non-seismic isolation layer 3 at the lower exit of the escalator 1;

[0036] Step 4: Select the horizontally slidable device 6 according to the size of the base 4 and the bottom pit 5, and ensure that the horizontally slidable device 6 can be horizontally placed at the bottom of the bottom pit 5 and support the bottom of the base 4 above it;

[0037] Step 5: Place the base 4 in the pit 5, and make the fixed part and the sliding part of the horizontally slidable device 6 fixedly connect the bottom of the base 4 and the bottom of the pit 5 respectively, and at the same time ensure that the surrounding side walls of the base 4 and the corresponding side walls of the pit 5 are respectively provided with vibration isolation gaps 7;

[0038] Step 6: a sliding cover plate 8 is arranged at the lower exit of the escalator 1 to slide and overlap the lower non-seismic isolation layer 3 and the escalator 1;

[0039] Step 7: rigidly connect the upper exit of the escalator 1 to the upper seismic isolation layer 2;

[0040] When an earthquake occurs, a large horizontal displacement occurs between the upper seismic isolation layer 2 and the lower non-seismic isolation layer 3. Since the upper outlet of the escalator 1 is rigidly connected to the upper seismic isolation layer 2, the escalator 1 and the upper seismic isolation layer 2 produce synchronous horizontal displacement, that is, a large horizontal displacement occurs between the escalator 1 and the lower non-seismic isolation layer 3. At this time, since the escalator 1 is only connected to the lower non-seismic isolation layer 3 by horizontal sliding device 6 at the lower outlet, the horizontal displacement caused by the earthquake is concentrated at the lower outlet of the escalator 1. During the displacement, the base 4 at the bottom of the lower outlet of the escalator 1 and the bottom pit 5 at the lower non-seismic isolation layer 3 produce relative horizontal sliding through the horizontal sliding device 6. Due to the spacing isolation of the vibration isolation joints 7, the horizontal displacement caused by the earthquake will not affect the connection at the lower outlet of the escalator 1, and will not affect the entire escalator 1, thereby ensuring the safety of the overall structure of the escalator 1 passing through the seismic isolation layer during an earthquake.

[0041] Furthermore, the base 4 in the step 2 is a trough-shaped steel structure, and the lower outlet of the escalator 1 is fixedly connected to the trough bottom and / or trough side wall of the base 4; the trough-shaped steel structure base 4 ensures that the base 4 can serve as the foundation of the escalator 1, provide good supporting conditions, and at the same time have the ability to prevent the escalator 1 from overturning.

[0042] Furthermore, the horizontally slidable device 6 in step 4 includes rollers, rollers, and a slide plate.

[0043] Furthermore, the slide plate is a rectangular polytetrafluoroethylene plate, and the horizontal single side of the polytetrafluoroethylene plate is fixedly connected to the bottom surface of the base 4 or the bottom surface of the pit 5; since polytetrafluoroethylene has high strength, toughness, corrosion resistance and self-lubricating properties, when the bottom surface of the polytetrafluoroethylene plate is fixed to the bottom surface of the pit 5, its upper surface can be used to place the base 4, and provide good horizontal sliding properties for the base 4 during an earthquake, thereby preventing the displacement of the lower non-seismic isolation layer 3 from affecting the bottom rigidity damage of the escalator 1. Similarly, the upper surface of the polytetrafluoroethylene plate is fixed to the base 4, and its bottom surface has good horizontal sliding properties with the bottom surface of the pit 5, which can also prevent the displacement of the lower non-seismic isolation layer 3 from affecting the bottom rigidity damage of the escalator 1.

[0044] Furthermore, in step five, the width of the vibration isolation slit 7 is not less than 600 mm; a vibration isolation slit 7 greater than 600 mm can effectively isolate most horizontal displacements during earthquakes.

[0045] Furthermore, in the step five, a fixing rod 9 is horizontally arranged at the vibration isolation joint 7, and the two ends of the fixing rod 9 are respectively fixedly connected to the base 4 and the bottom pit 5, and the fixing rod 9 is made of a brittle material; the fixing rod 9 usually plays the role of fixing the base 4 to provide rigid support for the entire escalator 1, and under the action of a small external force during an earthquake, deformation such as stretching, impact, etc. can cause damage and fracture, thereby preventing the deformation of the lower non-seismic isolation layer 3 during an earthquake from causing a rigid impact on the base 4, thereby ensuring the safety of the overall structure of the escalator 1 passing through the seismic isolation layer during an earthquake.

[0046] Furthermore, the brittle material includes glass and ceramic.

[0047] Furthermore, the fixing rod 9 is provided with a stress breaking section 10, and the cross-sectional area of ​​the stress breaking section 10 is smaller than the cross-sectional area of ​​other parts of the fixing rod 9; when a small external force occurs during an earthquake, deformation such as stretching, impact, etc. can cause the weak part of the stress breaking section 10 to break and fracture, thereby ensuring the earthquake sensitivity of the fixing rod 9.

[0048] Example

[0049] In this embodiment, in an actual airport project, a construction method is adopted in which the foundation and the upper terminal structure are separated with a vibration isolation layer in between. The vibration isolation layer isolates the input of seismic energy to the upper buildings. During an earthquake, the vibration isolation layer isolates the above-ground part from the underground structure. During an earthquake, the upper terminal structure moves almost horizontally and automatically resets after the earthquake.

[0050] In this embodiment, a lower non-seismic isolation layer 3 is set in the foundation part, an upper seismic isolation layer 2 is set in the upper terminal part, and an escalator 1 is installed from the underground part of the airport to the upper terminal part; a pit 5 is set at the lower non-seismic isolation layer 3, and the base 4 is fixedly connected to the bottom of the lower exit of the escalator 1, and a horizontally sliding device 6 made of a rectangular polytetrafluoroethylene plate is laid in the pit 5. After the base 4 is placed on the polytetrafluoroethylene plate, a sliding cover plate 8 is used to slide and overlap the lower non-seismic isolation layer 3, so as to facilitate pedestrians to enter and exit the lower exit of the escalator 1, and then the base 4 and the pit 5 are fixedly connected with a fixing rod 9.

[0051] During the seismic displacement test, when simulating an earthquake, the upper isolation layer 2 of the simulated upper terminal part produces a large horizontal displacement relative to the lower non-isolation layer 3 of the foundation part. Since the upper exit of the escalator 1 is rigidly connected to the upper terminal part, the escalator 1 and the upper terminal part produce synchronous horizontal displacement, that is, a large horizontal displacement occurs between the escalator 1 and the foundation part. At this time, since the escalator 1 is only connected to the foundation part through the horizontal sliding device 6 at the lower exit, the horizontal displacement caused by the earthquake is concentrated at the lower exit of the escalator 1. During the displacement, the base 4 at the bottom of the lower exit of the escalator 1 and the bottom pit 5 at the foundation part produce relative horizontal sliding through the horizontal sliding device 6. Due to the spacing isolation of the vibration isolation joints 7, the horizontal displacement caused by the earthquake will not affect the connection at the lower exit of the escalator 1, and will not affect the entire escalator 1, thereby ensuring the safety of the overall structure of the escalator 1 connecting the upper terminal and the foundation part when passing through the isolation layer during an earthquake.

[0052] In summary, the present invention provides a method for an escalator to pass through an isolation layer, by arranging a base at the bottom of the escalator, and arranging a pit at the lower non-isolation layer, and by a non-rigid horizontally slidable connection between the base and the pit, the escalator as a whole follows the synchronous displacement of the upper isolation layer at the upper exit of the escalator to produce horizontal displacement during an earthquake, and by arranging an isolation joint between the base and the bottom box, the horizontal displacement produced during an earthquake will not affect the connection at the lower exit of the escalator, and further will not affect the entire escalator, thereby ensuring the safety of the overall structure of the escalator passing through the isolation layer during an earthquake; the advantages of the present invention are that there is no need to build an escalator platform rising from the non-isolation area, and there is no need to set a large isolation deformation joint in the high space at the upper exit of the escalator. Therefore, the device for the escalator of the present invention to pass through the isolation layer is simple in layout, good in indoor effect, and safer in structure. Therefore, the present invention has broad application prospects.

[0053] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for an escalator to pass through a seismic isolation layer, characterized in that: The steps include: Step 1: according to actual needs, determine the upper exit position of the escalator (1) at the upper seismic isolation layer (2) and the lower exit position at the lower non-seismic isolation layer (3), and determine that a seismic isolation layer is provided between the upper seismic isolation layer (2) and the lower non-seismic isolation layer (3). The seismic isolation layer can isolate the seismic effect and also cause the upper seismic isolation layer (2) to produce horizontal displacement relative to the lower non-seismic isolation layer (3) under the action of the earthquake; Step 2: Determine the size, thickness and material of the rectangular base (4) fixedly connected to the bottom of the lower exit of the escalator (1) according to the lifting height, inclination angle, rated speed and step width of the escalator (1); Step 3: according to the size of the base (4) in step 2, a rectangular groove-shaped bottom pit (5) is provided at the lower non-seismic isolation layer (3) at the lower exit of the escalator (1); Step 4: Select a horizontally slidable device (6) according to the size of the base (4) and the bottom pit (5), and ensure that the horizontally slidable device (6) can be horizontally placed at the bottom of the bottom pit (5) and support the bottom of the base (4) above the horizontally slidable device (6); Step 5: placing the base (4) in the pit (5), and making the fixed part and the sliding part of the horizontally slidable device (6) respectively fixedly connected to the bottom of the base (4) and the bottom of the pit (5), while ensuring that vibration isolation gaps (7) are provided between the surrounding side walls of the base (4) and the corresponding surrounding side walls of the pit (5); Step 6: a sliding cover plate (8) is provided at the lower exit of the escalator (1) to slide and overlap the lower non-seismic isolation layer (3) and the escalator (1); Step 7: rigidly connect the upper exit of the escalator (1) to the upper seismic isolation layer (2); In the step 5, a fixing rod (9) is horizontally arranged at the vibration isolation gap (7), and the two ends of the fixing rod (9) are respectively fixedly connected to the base (4) and the bottom pit (5), and the fixing rod (9) is made of a brittle material; The fixing rod (9) is provided with a stress breaking section (10), and the cross section of the stress breaking section (10) is The area is smaller than the cross-sectional area of ​​other parts of the fixing rod (9).

2. The method for an escalator to pass through a seismic isolation layer according to claim 1, characterized in that: Said The base (4) in step 2 is a steel structure trough-shaped, and the lower outlet of the escalator (1) is fixedly connected to the trough-shaped bottom and / or trough-shaped side wall of the base (4).

3. The method for an escalator to pass through a seismic isolation layer according to claim 1, characterized in that: The horizontally slidable device (6) in step 4 comprises a roller, a roller shaft, and a slide plate.

4. The method for an escalator to pass through a seismic isolation layer according to claim 3, characterized in that: Said The slide plate is a rectangular parallelepiped polytetrafluoroethylene plate, and a horizontal single surface of the polytetrafluoroethylene plate is fixedly connected to the bottom surface of the base (4) or the bottom surface of the bottom pit (5).

5. The method for an escalator to pass through a seismic isolation layer according to claim 1, characterized in that: In step five, the width of the vibration isolation gap (7) is not less than 600 mm.

6. The method for an escalator to pass through a seismic isolation layer according to claim 1, characterized in that: Said Brittle materials include glass and ceramics.

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