Vibration reduction system for building construction close to underground rail transit
By adopting a dual vibration reduction system of foundation pit and foundation in construction, using bubble light soil and vibration-absorbing cushion layer to isolate the subway vibration, the impact of subway vibration on the lives of buildings and residents is solved, and the vibration resistance of the building is improved.
Patent Information
- Application Number
- CN202421740855.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-22
AI Technical Summary
When building construction is carried out around the subway, the vibration of the subway will affect the service life of the building and the normal life of residents, and the existing technology will be difficult to effectively solve this problem.
The foundation pit vibration reduction system and the foundation pit vibration reduction system are adopted. The foundation pit vibration reduction system includes masonry retaining walls and bubble light soil. The bubble light soil is poured between the masonry retaining walls and the foundation pit step surface to form a vibration reduction layer; the foundation vibration reduction system includes a cushion layer, a waterproof layer, a vibration reduction cushion layer and a foundation concrete. The vibration reduction cushion layer is spliced through the insertion block and the insertion interface to form a vibration reduction effect with good sealing and waterproofness.
Through the dual vibration reduction measures of foundation pits and foundations, subway vibration vibration is effectively isolated, the building's vibration resistance is improved, and the building's service life and the normal living experience of residents are ensured.
Smart Images
Figure CN222908903U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building structures, and more specifically to a vibration reduction system for building construction near underground rail transit. Background Art
[0002] With the rapid development of urban construction in my country, rail transit has become a link to ease urban traffic pressure, connect the city center and the suburbs, and become a necessary means of transportation for people's daily travel due to its characteristics of speed, safety, punctuality and large capacity.
[0003] In order to ease the traffic pressure, the subway has to pass through densely populated residential areas and commercial centers in the city, and most of them are currently buried shallowly. The subway tunnels are getting closer and closer to the buildings. With the continuous expansion of the scale of urban underground rail transit, the subway is getting closer to buildings more and more. At the same time, the overall density of subway operation increases, and the vibration generated by the subway operation is getting bigger and bigger.
[0004] When a train runs along a track, the dynamic wheel-rail load caused by track unevenness causes the vehicle-track system to vibrate. The vibration radiates through the ballast and roadbed to distant soil bodies, thereby causing vibrations in buildings around the track.
[0005] With the continuous development of the city, more and more construction projects are built near the subway. The noise and vibration of the subway have a relatively large impact on the buildings. It is necessary to consider taking certain vibration reduction and isolation measures to improve the performance of the buildings.
[0006] Therefore, how to provide a vibration reduction system for construction near underground rail transit to ensure that the vibration of the subway does not affect the service life of the building and the normal life of residents when construction is carried out around the subway is an urgent problem that technical personnel in this field need to solve. Utility Model Content
[0007] In view of this, the utility model provides a vibration reduction system for building construction near underground rail transit, aiming to solve the above technical problems.
[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0009] A vibration reduction system for building construction near underground rail transit, including a foundation pit vibration reduction system and a foundation vibration reduction system;
[0010] The foundation pit vibration reduction system includes a masonry retaining wall and bubble lightweight soil, a step surface is excavated along the inner wall of the foundation pit, the masonry retaining wall is built on the periphery of the foundation pit, and the bubble lightweight soil is poured between the wall surface of the masonry retaining wall and the step surface;
[0011] The foundation vibration reduction system comprises, from bottom to top, a cushion layer, a waterproof layer, a vibration reduction cushion layer and foundation concrete.
[0012] The beneficial effect of the above technical solution is that a step surface is excavated on the inner wall of the foundation pit to prevent uneven settlement and cracking of the foundation pit and improve the foundation pit's ability to withstand lateral stress of the soil. Bubble lightweight soil is poured between the masonry retaining wall and the step surface of the foundation pit. The bubble lightweight soil and the masonry retaining wall are used to form a vibration reduction layer around the inner wall of the foundation pit, which can isolate the subway vibration from being transmitted into the foundation pit. Vibration reduction pads are provided on the building foundation to achieve the effect of vertical vibration reduction.
[0013] Preferably, the masonry retaining wall is constructed by using a plurality of prefabricated panels, the panel surfaces of the prefabricated panels face the step surface, and the prefabricated panels of the upper and lower layers are arranged in staggered joints to ensure the stability of the masonry retaining wall.
[0014] Preferably, it further comprises a tie steel bar, the plate surface of the precast plate facing the step surface is pre-buried with an anchor ring, one end of the tie steel bar is fixed to the anchor ring, and the other end is anchored in the soil of the foundation pit corresponding to the step surface. The tie steel bar can tie and connect the precast plate with the soil of the foundation pit, preventing the tilting deformation or collapse of the masonry retaining wall caused by the pressure of the bubble lightweight soil during the pouring process.
[0015] Preferably, an underground garage retaining wall is cast on one side of the masonry retaining wall away from the step surface. The foundation pit can be used as a parking space for the underground garage.
[0016] Preferably, the vibration damping pad layer is formed by splicing a plurality of vibration damping pads, one end of the vibration damping pad is fixed with an insert block, and the other end is provided with an insert port, and the insert blocks of two adjacent vibration damping pads are inserted into the insert port. The vibration damping pads are plugged into each other to form the vibration damping pad layer.
[0017] Preferably, a sealing gasket is fixed to the outer periphery of the plug block, which can improve the sealing performance between the plug block and the plug interface, prevent the entry of cement slurry, and ensure the vibration reduction and isolation effect of the vibration reduction pad.
[0018] Preferably, waterproof mortar is applied to the joints between the two adjacent vibration-damping pads corresponding to the plug block and the plug interface, so as to improve the waterproof performance between the plug block and the plug interface.
[0019] Preferably, L-shaped grooves are provided on both sides of the outer surface along the length direction of the vibration damping pad, and two adjacent vibration damping pads are inverted and the groove walls of the two opposite L-shaped grooves are pressed and matched. The adjacent two vibration damping pads can be inverted and snapped together.
[0020] Preferably, a pressing sealing strip is fixed to the outer surface end of the vibration-damping pad away from the L-shaped groove. By pressing the sealing strip down, the joints of the two vibration-damping pads relative to the L-shaped groove can be blocked to achieve a waterproof sealing effect.
[0021] Preferably, the waterproof layer is a waterproof film, and at least two waterproof films are stacked. The waterproof film is used as the waterproof layer to prevent groundwater from penetrating into the wall or the underground garage.
[0022] It can be seen from the above technical solution that, compared with the prior art, the utility model discloses a vibration reduction system for construction near underground rail transit. The foundation pit construction system uses bubble lightweight soil to offset the lateral vibration transmitted by the subway, and the foundation vibration reduction pad can offset the vertical vibration transmitted by the subway. The dual vibration reduction measures of the foundation pit and the foundation are used to improve the vibration reduction performance of the building near the subway. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0024] Figure 1 A cross-sectional view of the building system provided by the utility model;
[0025] Figure 2 for Figure 1 A magnified schematic diagram of part A in FIG.
[0026] Figure 3 A cross-sectional view of the basic vibration reduction system;
[0027] Figure 4 This is the front view of the masonry wall;
[0028] Figure 5 It is a top view of the vibration damping pad connection;
[0029] Figure 6 for Figure 5 BB section view in.
[0030] in,
[0031] 1-step surface; 2-masonry retaining wall; 21-precast board; 3-bubble lightweight soil; 4-tie steel bars; 5-underground garage retaining wall; 6-cushion; 7-waterproof layer; 8-vibration-damping cushion layer; 81-vibration-damping pad; 82-plug block; 83-plug interface; 84-sealing pad; 85-L-shaped groove; 86-press sealing strip; 9-foundation concrete. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] The utility model embodiment discloses a vibration reduction system for building construction near underground rail transit, including a foundation pit vibration reduction system and a foundation vibration reduction system. Through dual vibration reduction measures for the building foundation pit and the building foundation, the vibration resistance of the building near the subway is guaranteed, and the normal life experience of the residents near the subway is ensured;
[0034] The foundation pit vibration reduction system includes a masonry retaining wall 2 and a bubble lightweight soil 3. A step surface 1 is excavated along the inner wall of the foundation pit. The masonry retaining wall 2 is built on the surrounding side of the foundation pit, and the bubble lightweight soil 3 is poured between the wall surface of the masonry retaining wall 2 and the step surface 1.
[0035] The foundation vibration reduction system includes, from bottom to top, a cushion layer 6, a waterproof layer 7, a vibration reduction cushion layer 8 and foundation concrete 9.
[0036] In this embodiment, the masonry retaining wall 2 is constructed by using a plurality of prefabricated panels 21 , the panel surfaces of the prefabricated panels 21 face the step surface 1 , and the upper and lower layers of prefabricated panels 21 are arranged in staggered joints.
[0037] In order to further optimize the above technical solution, it also includes tie steel bars 4, and the plate surface of the prefabricated plate 21 facing the step surface 1 is pre-embedded with an anchor ring. One end of the tie steel bar 4 is fixed on the anchor ring, and the other end is anchored in the soil body corresponding to the step surface 1 of the foundation pit.
[0038] In this embodiment, the thickness of the prefabricated plate 21 is 4-6 cm, and a steel mesh is provided inside the prefabricated plate 21 .
[0039] Since the precast slab is relatively thin, during the masonry process, tie steel bars are used to anchor it to the soil corresponding to the foundation pit step surface; steel bars are anchored in the soil corresponding to the foundation pit step surface, and the masonry wall is built in layers, with corresponding tie steel bars installed for each layer. One end of the tie steel bar is welded and fixed to the anchor ring of the precast slab, and the other end is welded to the anchor steel bar.
[0040] In order to further optimize the above technical solution and prevent the extrusion deformation of the masonry retaining wall, a layer of bubble lightweight soil is poured after every three layers of precast panels are built, and the previous precast panel is built after the bubble lightweight soil solidifies.
[0041] The mass of the bubble lightweight soil itself is small. The extrusion and deformation of the masonry retaining wall can be avoided by connecting the precast panels with steel bars and pouring them in layers. The masonry retaining wall serves as a pouring baffle for the bubble lightweight soil, avoiding the installation of the formwork during the pouring process. It can also prevent the extrusion force of the soil. After the bubble lightweight soil is poured, it is an inverted step shape opposite to the step surface, which can be used as a vibration reduction pad for the side wall of the foundation pit to ensure the vibration reduction effect of the foundation pit.
[0042] In order to further optimize the above technical solution, an underground garage retaining wall 5 is cast on the side of the masonry retaining wall 2 away from the step surface 1. The underground garage retaining wall encloses the internal space of the foundation pit into an underground garage, solves the problem of tight parking near the subway, and relieves the parking pressure of residents.
[0043] In this embodiment, the vibration-damping pad layer 8 is formed by splicing a plurality of vibration-damping pads 81 . An insert block 82 is fixed to one end of the vibration-damping pad 81 , and an insert port 83 is opened at the other end. The insert blocks 82 of two adjacent vibration-damping pads 81 are inserted into the insert port 83 .
[0044] The two vibration-damping pads with opposite ends can be plugged into each other, and the plug-in block and the plug-in interface cooperate to ensure the splicing of the two adjacent vibration-damping pads at the ends.
[0045] In order to further optimize the above technical solution, improve the sealing performance of the joint between the plug block and the plug interface, and prevent the entry of cement slurry during foundation concrete pouring from reducing the vibration reduction effect, a sealing gasket 84 is fixed to the outer periphery of the plug block 82.
[0046] In order to further optimize the above technical solution and improve the waterproof performance of the joint between the plug block and the plug interface, waterproof mortar is coated on the joint between the plug block 82 and the plug interface 83 of two adjacent vibration damping pads 81.
[0047] In this embodiment, L-shaped grooves 85 are provided on both sides of the outer surface of the vibration-damping pad 81 along the length direction. Two adjacent vibration-damping pads 81 are inverted with each other and the groove walls of the two opposite L-shaped grooves 85 are pressed and fitted.
[0048] The two sealing pads facing each other laterally are inverted and spliced together by interlocking with each other using the steps formed by the L-shaped groove. After the splicing is completed, there is only one splicing seam along the length direction of the vibration damping pad.
[0049] In order to further optimize the above technical solution, a pressing sealing strip 86 is fixed to the end of the outer surface of the vibration-damping pad 81 away from the L-shaped groove 85 .
[0050] After the two laterally opposite vibration damping pads are buckled together, the pressing sealing strip is manually pressed down along the joint position. The pressing sealing strip can cover the joint along the length direction of the vibration damping pad to ensure the sealing effect between the two laterally opposite vibration damping pads.
[0051] In order to further optimize the above technical solution, the waterproof layer 7 is a waterproof film, and at least two waterproof films are stacked.
[0052] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.
[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A vibration reduction system for construction near underground rail transit, characterized in that: Including foundation pit vibration reduction system and foundation vibration reduction system; The foundation pit vibration reduction system comprises a masonry retaining wall (2) and a bubble lightweight soil (3); a step surface (1) is excavated along the inner wall of the foundation pit; the masonry retaining wall (2) is built on the periphery of the foundation pit; and the bubble lightweight soil (3) is poured between the wall surface of the masonry retaining wall (2) and the step surface (1); The foundation vibration reduction system comprises, from bottom to top, a cushion layer (6), a waterproof layer (7), a vibration reduction cushion layer (8) and foundation concrete (9).
2. A vibration reduction system for construction near underground rail transit according to claim 1, characterized in that: The masonry retaining wall (2) is constructed by masonry of a plurality of prefabricated panels (21), the panel surfaces of the prefabricated panels (21) face the step surface (1), and the prefabricated panels (21) of the upper and lower layers are arranged with staggered joints.
3. A vibration reduction system for construction near underground rail transit according to claim 2, characterized in that: It also includes tie bars (4), and an anchor ring is pre-buried on the plate surface of the prefabricated plate (21) facing the step surface (1). One end of the tie bar (4) is fixed to the anchor ring, and the other end is anchored in the soil of the foundation pit corresponding to the step surface (1).
4. The vibration reduction system for construction near underground rail transit according to claim 1, characterized in that: An underground garage retaining wall (5) is cast on the side of the masonry retaining wall (2) away from the step surface (1).
5. The vibration reduction system for construction near underground rail transit according to claim 1, characterized in that: The vibration-damping pad layer (8) is formed by splicing a plurality of vibration-damping pads (81); an insert block (82) is fixed at one end of the vibration-damping pad (81); an insert port (83) is provided at the other end; the insert blocks (82) of two adjacent vibration-damping pads (81) are inserted into the insert port (83).
6. A vibration reduction system for construction near underground rail transit according to claim 5, characterized in that: A sealing gasket (84) is fixed to the outer periphery of the insert block (82).
7. A vibration reduction system for construction near underground rail transit according to claim 6, characterized in that: Waterproof mortar is coated on the joints between the two adjacent vibration-damping pads (81) corresponding to the plug blocks (82) and the plug ports (83).
8. The vibration reduction system for construction near underground rail transit according to claim 5, characterized in that: L-shaped grooves (85) are provided on both sides of the outer surface of the vibration damping pad (81) along the length direction, and two adjacent vibration damping pads (81) are inverted with each other and the groove walls of the two opposite L-shaped grooves (85) are pressed and fitted.
9. A vibration reduction system for construction near underground rail transit according to claim 8, characterized in that: A pressing sealing strip (86) is fixed to the outer surface end of the vibration-damping pad (81) away from the L-shaped groove (85).
10. The vibration reduction system for construction near underground rail transit according to claim 1, characterized in that: The waterproof layer (7) is a waterproof film, and at least two of the waterproof films are stacked.