CN111287223A - Seismic isolation and reduction system and method - Google Patents
Seismic isolation and reduction system and method Download PDFInfo
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- CN111287223A CN111287223A CN202010163910.7A CN202010163910A CN111287223A CN 111287223 A CN111287223 A CN 111287223A CN 202010163910 A CN202010163910 A CN 202010163910A CN 111287223 A CN111287223 A CN 111287223A
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/18—Sinks, whether or not connected to the waste-pipe
- E03C1/182—Sinks, whether or not connected to the waste-pipe connected to the waste-pipe
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
The invention discloses a seismic isolation and reduction system and a seismic isolation and reduction method. The damping system can change the mass of the pebble layer by pumping and injecting liquid into the pebble layer in the cavity, realize the adjustment of the inertia force of the pebble layer and the adjustment of the natural vibration frequency, change the inertia of the pebble layer while basically not changing the bearing performance of the pebble layer, enable the pebble particles and the liquid among the particles to interact, play a resonance effect and perform liquid shaking friction energy dissipation through the movement of the pebble layer, reduce the vibration response of a building structure, greatly improve the damping and energy dissipation efficiency of the system, and effectively reduce earthquake disasters; the seismic isolation and reduction system has pioneering engineering significance and practical value.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a seismic isolation and reduction system and a seismic isolation and reduction method.
Background
Along with the expansion of urban construction, the demand for coping with complex geological engineering environment is more urgent, the problem that the upper building structure constructed in a complex foundation condition field is insufficient in anti-seismic performance is faced, and how to improve the anti-seismic performance of the upper building structure under seismic excitation is more and more important. Therefore, the integral rigidity and damping of the foundation are in favorable states by improving the engineering characteristics of the complex foundation, so that the energy dissipation and shock absorption effects become an economic and effective means, and the foundation seismic isolation and reduction technology for realizing the seismic resistance of the upper building structure and the energy dissipation and shock absorption has wide prospects in engineering by improving the engineering characteristics of natural strata.
For the seismic isolation and reduction technology of the foundation, the seismic isolation and reduction technology can be divided into damping control and seismic isolation control from the aspect of control theory, and the damping control realizes the minimization of the vibration response of an upper building structure by additionally arranging an energy dissipation damping device or a tuned damping damper device in the upper building structure; the shock insulation control enables the structure to be free from shock influence by additionally arranging a shock insulation support between the foundation and the upper building structure.
The conventional foundation seismic isolation and reduction technology only makes requirements on the bearing capacity of a foundation, so that common foundation treatment modes are achieved by a foundation reinforcement strategy, seismic isolation and reduction measures are achieved by improving an upper building structure, for example, aiming at the problem of seismic control of a high-rise structure, more measures are adopted, namely a tuned mass damper and a tuned liquid damper are arranged on a roof or a viscous damper and the like are arranged between a foundation and the upper building structure, and the dampers with metal structures achieve the purposes of changing the dynamic characteristics of the structure and reducing the dynamic response of the structure mainly by adding three basic mechanical elements such as mass, damping and springs in the structure; the metal damper has the problems of high material cost, concentrated yield point, limited shock absorption capacity and the like.
Disclosure of Invention
The invention aims to: aiming at the problems that the conventional foundation seismic mitigation and isolation technology in the prior art only makes requirements on the bearing capacity of the foundation, so that the common foundation treatment mode is achieved by a foundation reinforcement strategy, and seismic mitigation and isolation measures are realized by improving an upper building structure, but the metal dampers adopted by the seismic mitigation and isolation measures have the problems of high material cost, concentrated yield points of the metal dampers and limited damping capacity, the stratum seismic mitigation and isolation system and the method are provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a subtract shock insulation system, includes the chamber of taking out notes liquid device and locating on the ground, fill in the chamber and fill in the pebble layer, hold liquid in the chamber, take out notes liquid device be used for to annotate liquid or drawing liquid in holding the chamber, the pebble layer is used for as building structure's ground.
Pebbles are widely existed in nature, and in the construction process of actual engineering, the pebble stratum often meets geological conditions of a pebble stratum, and the pebble stratum has good compaction performance, strong water permeability, high shear strength, difficult liquefaction under the action of earthquake load and other excellent engineering characteristics. For the research on the natural pebble stratum, researchers are more focused on investigating the bearing capacity of the pebble stratum or a pebble stratum reinforcing construction method, how to improve the engineering characteristics of the pebble stratum, and the research on the pebble stratum with better seismic isolation and reduction performance is not related yet, and rarely research.
According to the experience of the tuned liquid dampers arranged at the top of the structure, the displacement amplitude of the building structure under the action of earthquake excitation is reduced along with the increase of the water amount in the dampers, so that the floor damping system needs to be provided with too many tuned liquid dampers, and the problems of high construction cost, large occupied space and the like are caused.
The pebble stratum generally contains a certain amount of water, a pebble stratum and liquid are filled in a cavity of a container to form the geological condition of the pebble stratum in the nature, the cavity and the substances in the cavity are taken as a deep water frequency modulation liquid damper, and the influence of liquid shaking damping in the pebble stratum on the vibration control effect is more remarkable, so that the foundation shock absorption and isolation effect can be realized by transforming the water amount of the pebble stratum in the cavity, but the problem that how to effectively improve the liquid shaking damping of the pebble stratum in the cavity still needs to be researched. The research shows that when the shaking frequency of the water body in the tuned liquid damper is close to or slightly less than the natural vibration frequency of the building structure, the damping control effect of the tuned liquid damper system is optimal. The liquid shaking frequency is positively correlated with the liquid density, and the liquid density is also positively correlated with the shaking damping, so that the required liquid shaking frequency and damping can be obtained by changing the density of a certain volume of liquid.
The quality of the whole pebble layer can be changed by controlling the liquid content of the pebble layer in the cavity, the liquid shaking damping is amplified, the pebble layer is used as a frequency modulation liquid damper device to integrally reduce the displacement amplitude of the building structure, the whole pebble layer is mainly of a first vibration mode, and when the first natural vibration frequency of the pebble layer is close to the first natural vibration frequency of the building structure, the pebble layer vibration reduction and isolation system in the cavity can play a good control role.
Therefore, compared with the traditional shock absorption system, the shock absorption system has the following advantages: on one hand, the pebble layer is utilized, the bearing performance is good, the pores among the pebbles are large, and the water storage capacity is large; on the other hand, the mass of the pebble layer (the mass of the pebble layer comprises the mass of soil and stones therein and the mass of liquid) can be changed by pumping and injecting liquid into the pebble layer in the cavity with a certain volume, so that the adjustment of the inertia force of the pebble layer and the adjustment of the self-vibration frequency are realized, the inertia of the pebble layer is changed, and the bearing performance of the pebble layer is basically not changed, so that pebble particles and the particles are subjected to liquid interaction, the resonance effect and the liquid shaking friction energy dissipation are exerted through the movement of the pebble layer, the vibration response of a building structure is reduced, the shock absorption and energy dissipation efficiency; the seismic isolation and reduction system has pioneering engineering significance and practical value.
Preferably, the cavity wall is a concrete wall or a reinforced concrete wall.
Preferably, the cavity is filled with a soft clay layer, and the soft clay layer is positioned at the top of the pebble layer.
Preferably, the pebble layer comprises coarse pebble particles and fine sand particles, wherein the coarse pebble particles serve as main load-bearing carriers of the pebble layer and guarantee the strength requirement of the pebble layer.
Further preferably, the particle size of the pebble coarse particles is 6cm-20 cm.
By adopting the structural arrangement, the pebble coarse particles with the particle size of 6cm-20cm meet the requirements of the seismic isolation and reduction system on shear strength and rigidity.
Further preferably, the grain size of the fine sand grains is 0.075cm-6 cm.
Preferably, the liquid pumping and injecting device comprises:
the liquid storage unit is used for storing standby liquid;
and the power pump is used for injecting the standby liquid into the pebble layer to become pore liquid or sucking the pore liquid into the liquid storage unit.
The liquid pumping and injecting device ensures that the water level of the cavity in the cavity is kept within a certain range, avoids foundation settlement caused by the decline of the underground water level, can dynamically control the slurry content of the pebble bed, solves the technical problem of poor earthquake resistance of the building structure under earthquake excitation under the condition of complex stratums, has simple and convenient operation, high economic efficiency and good energy dissipation and shock absorption effects, can ensure that the pebble bed meets the expected energy dissipation and shock absorption requirements under the earthquake excitation, and effectively lightens the earthquake disaster degree of the building structure.
Further preferably, the power pump is a bidirectional pump, and the bidirectional pump can be used for liquid injection and liquid extraction;
or the power pump is two one-way pumps, one-way pump is used for injecting liquid, and the other one-way pump is used for pumping liquid.
Further preferably, the seismic isolation and reduction system comprises a plurality of power pumps, and the power pumps are arranged in parallel and/or in series, so that the pump liquid conveying efficiency is improved.
Further preferably, the power pump is communicated with the liquid storage unit through a pipeline, and the power pump is communicated with the pebble layer through the pipeline.
Further preferably, a control valve is arranged on the pipeline between the power pump and the liquid storage unit to open and close the communication between the power pump and the liquid storage unit.
Further preferably, the seismic isolation and reduction system further comprises a pipeline well, and the pipeline well is deep into the pebble bed.
Further preferably, the bottom of the pipeline well is lower than the water level of the cavity in the cavity.
Further preferably, the bottom of the pipeline well is located from the middle position to the bottom position in the depth direction of the pebble bed.
Further preferably, the pipeline well is a drilled well.
Further preferably, a well pipe is arranged in the pipeline well, and the top end of the well pipe is connected with the power pump.
Further preferably, the bottom end of the well pipe is below the water level of the cavity.
Further preferably, the pipe wall of the well pipe is provided with a plurality of water seepage holes.
Further preferably, the water seepage holes are round holes or square holes.
Further preferably, the well pipe is a steel well pipe.
Further preferably, the pipe shoe of the pipe well is bolted or welded to the steel well pipe.
The construction method of the drilling well comprises the steps that the hydraulic central drilling tool realizes impact drilling under the action of the gravity impactor, the reaming drilling tool with expansion and contraction functions is used for reaming the well wall to form the pipeline well, pipe shoes are arranged on the outer side of the reaming drilling tool, the top ends of the pipe shoes are fixed to the well pipe in a bolt connection or welding mode, the reaming drilling tool and the hydraulic central drilling tool sink under the action of gravity in the process of impact drilling, when the drilling depth reaches the designed position (middle position) in the pebble layer, drill bits of the reaming drilling tool are folded in, the reaming drilling tool, the hydraulic central drilling tool and the down-the-hole impactor are put away, the pipeline well is realized into the well, and the pipeline well array is realized by repeating the steps.
Further preferably, the reservoir unit comprises at least one reservoir.
Further preferably, the standby liquid is a water body, a polyester polyol liquid or a multi-element halide liquid.
Preferably, the seismic isolation and reduction system further comprises a control device, the control device is connected with the liquid pumping and injecting device, and the control device is used for controlling the liquid pumping and injecting device to inject liquid or pump liquid into the cavity so as to control the quality of the pebble layer.
Further preferably, the control means comprises a computer.
Preferably, the seismic isolation and reduction system further comprises a data monitoring device, the data monitoring device is connected with the control device, and the data monitoring device is used for monitoring the displacement of the building structure under the action of seismic excitation, monitoring the quality of the pebble bed and transmitting the data of the displacement and the quality to the control device.
Through the control device and the data monitoring device, the data monitoring device can monitor the damping effect of the pebble bed on the building structure under the action of seismic excitation in real time and feed back data to the control device in real time, the control device controls the liquid pumping and injecting device to inject liquid or pump liquid into the accommodating cavity according to the damping effect, the quality of the pebble bed is dynamically corrected, and the optimal damping performance is obtained.
Further preferably, the data monitoring device comprises an acceleration sensor, the acceleration sensor is arranged on the building structure, and the displacement amplitude of the top layer displacement and/or the displacement between the layers of the building structure are/is obtained through the acceleration sensor so as to monitor the displacement of the building structure under the action of seismic excitation.
Further preferably, at least one of the acceleration sensors is provided per floor.
Further preferably, the data monitoring device comprises a liquid density sensor, the liquid density sensor being located within the pebble bed.
Because the pebble bed has a certain volume, the mass of liquid can be increased by increasing the density of the liquid in the pebble bed, so that the mass of the pebble bed is increased, and the mass of the pebble bed can be indirectly calculated by monitoring the density of the liquid in the pebble bed through the liquid density sensor.
Further preferably, the liquid density sensor is attached to the outer wall of the well tubular.
Further preferably, the data monitoring device comprises a liquid pressure sensor, and the liquid pressure sensor is arranged in the pebble layer.
Because the pebble layer has a certain volume, the mass of liquid can be increased by increasing the volume of pore liquid among pebble coarse particles in the pebble layer, so that the mass of the pebble layer is increased, and the mass of the pebble layer can be obtained by monitoring the water pressure in the pebble layer by the liquid pressure sensor and indirectly calculating the water level height of the accommodating cavity.
Further preferably, the liquid pressure sensor is arranged at the bottom of the pipeline well.
The invention also provides a construction method of the seismic isolation and reduction system, which comprises the following steps:
digging a pit on the foundation, and performing waterproof treatment on the surface of the pit to form a containing cavity;
filling a pebble layer in the accommodating cavity, wherein the pebble layer is used as a foundation of a building structure;
the well casing is arranged in the accommodating cavity, the well casing extends into the pebble layer, the top end of the well casing is connected with a pipeline, the pipeline is connected with a liquid storage unit, and standby liquid is stored in the liquid storage unit.
The construction method of the seismic isolation and reduction system utilizes the characteristic of pebbles, can adopt the conventional technical means for pit digging and waterproof treatment, is convenient to construct, has low manufacturing cost, and is suitable for different foundation conditions.
Preferably, the foundation is reinforced after the pit is dug.
Preferably, the pipeline is connected with a power pump, the power pump is connected with the liquid storage unit, and the power pump is used for injecting the standby liquid into the pebble layer or pumping pore liquid in the pebble layer into the liquid storage unit.
Further preferably, the construction method further comprises the following steps:
the power pump is connected with a control device, the control device is connected with a data monitoring device, and the data monitoring device comprises an acceleration sensor, a liquid density sensor and a liquid pressure sensor;
the acceleration sensor is arranged on the building structure, and the liquid density sensor and the liquid pressure sensor are arranged in the pebble layer.
Preferably, a pipeline well is constructed in the containing cavity, and a well pipe is located in the pipeline well.
The invention also provides a method for realizing the seismic isolation and reduction system,
acquiring the natural vibration period and/or the natural vibration frequency of the building structure;
acquiring the natural vibration period and/or the natural vibration frequency of the pebble layer in the cavity;
and injecting liquid or pumping liquid into the cavity through the liquid pumping and injecting device so as to change the quality of the pebble layer, thereby changing the natural vibration period and/or the natural vibration frequency of the pebble layer and enabling the natural vibration frequency of the pebble layer to reach 0.8, 1.2 of the natural vibration frequency of the building structure.
By adopting the implementation method of the seismic isolation and reduction system, the self-vibration frequency of the pebble bed can be close to the self-vibration frequency of the building structure, so that the pebble bed in the cavity with a certain volume is simulated into an ultra-large tuned liquid damper to obtain the optimal damping control effect.
Preferably, the difference value between the building structure and the pebble bed natural vibration period and/or natural vibration frequency is obtained according to the building structure natural vibration period and/or natural vibration frequency and the pebble bed natural vibration period and/or natural vibration frequency;
and determining that the liquid pumping and injecting device injects or pumps liquid into the pebble bed according to the difference value.
Preferably, a numerical model of the building structure is established, and modal analysis is performed to obtain a natural vibration period and/or a natural vibration frequency of the building structure.
Preferably, a numerical model of the pebble layer in the cavity is established, and modal analysis is performed to obtain the natural vibration period and/or the natural vibration frequency of the pebble layer.
Preferably, after the natural vibration frequency of the pebble bed reaches [0.8, 1.2] of the natural vibration frequency of the building structure, under the action of seismic excitation, whether the pebble bed with changed quality plays a role in damping is judged by monitoring the data index of the displacement amplitude of the top layer and/or the displacement between layers of the building structure;
and if the damping effect is not expected, dynamically correcting the pebble bed quality according to the data index.
The present invention also provides an electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the program in the memory to implement the method for implementing the seismic mitigation and isolation system as described in any one of the above.
The invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements an implementation method of the seismic mitigation and isolation system as described in any of the above.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the damping system has the following advantages: on one hand, the pebble layer is utilized, the bearing performance is good, the pores among the pebbles are large, and the water storage capacity is large; on the other hand, the mass of the pebble layer can be changed by pumping and injecting liquid into the pebble layer in the cavity with a certain volume, so that the adjustment of the inertia force of the pebble layer and the adjustment of the natural vibration frequency are realized, the inertia of the pebble layer is changed while the bearing performance of the pebble layer is basically not changed, the pebble particles and the liquid among the particles are interacted, the resonance effect and the liquid shaking friction energy dissipation are realized through the movement of the pebble layer, the vibration response of a building structure is reduced, the shock absorption and energy dissipation efficiency of the system is greatly improved, and the earthquake; the seismic isolation and reduction system has pioneering engineering significance and practical value;
2. according to the damping system, the water level of the cavity in the cavity is kept within a certain range through the liquid pumping and injecting device, foundation settlement caused by underground water level reduction is avoided, the content of pebble bed slurry can be dynamically controlled, the technical problem that the building structure under the condition of complex stratum is poor in anti-seismic performance under seismic excitation is solved, the method is simple and convenient to operate, high in economic efficiency and good in energy dissipation and damping effects, the pebble bed can be guaranteed to meet the expected energy dissipation and damping requirements under the seismic excitation, and the degree of earthquake disasters of the building structure is effectively reduced;
3. according to the damping system, through the control device and the data monitoring device, the data monitoring device can monitor the damping effect of the pebble bed on the building structure under the action of seismic excitation in real time and feed back data to the control device in real time, the control device controls the liquid pumping and injecting device to inject or pump liquid into the cavity according to the damping effect, the quality of the pebble bed is dynamically corrected, and the optimal damping performance is obtained;
4. according to the construction method of the seismic isolation and reduction system, the characteristic of pebbles is utilized, the conventional technical means can be adopted for pit digging and waterproof treatment, the construction is convenient, the manufacturing cost is low, and the construction method is suitable for different foundation conditions;
5. according to the implementation method of the seismic isolation and reduction system, the self-vibration frequency of the pebble bed can be close to the self-vibration frequency of the building structure, so that the pebble bed in the cavity with a certain volume is simulated into an ultra-large tuned liquid damper, and the optimal damping control effect is obtained.
Drawings
FIG. 1 is a schematic view of the chamber of the present invention;
FIG. 2 is a schematic view of the arrangement of the pebble bed of the present invention;
FIG. 3 is a schematic structural diagram of the seismic mitigation and isolation system of the present invention;
FIG. 4 is a schematic control diagram of the seismic mitigation and isolation system of the present invention;
FIG. 5 is a graph comparing the effect of damping of the pebble bed at different fluid levels (peak acceleration);
figure 6 is a graph comparing the effect of damping of the pebble bed (displacement) at different fluid levels.
Icon: 01-foundation, 1-cavity, 2-pebble layer, 3-soft clay layer, 4-pebble coarse particles, 5-fine sand particles, 6-pore liquid, 7-flow direction, 8-pipeline, 9-pipeline well, 10-well pipe, 11-cavity water level, 12-power pump, 13-liquid pressure sensor, 14-liquid density sensor, 15-acceleration sensor, 16-liquid storage unit, 17-standby liquid, 18-control valve, 19-control device and 20-building structure.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-4, the seismic isolation and reduction system of the present invention includes a cavity 1 disposed on a foundation 01, and further includes a piping well 9, a liquid pumping and injecting device, a control device 19, and a data monitoring device, wherein liquid is held in the cavity 1.
The wall of the cavity 1 is a concrete wall or a reinforced concrete wall, a pebble layer 2 and a soft clay layer 3 are filled in the cavity 1, and the soft clay layer 3 is positioned at the top of the pebble layer 2.
The pebble layer 2 is used as a foundation of a building structure 20, the pebble layer 2 comprises pebble coarse particles 4 and fine sand particles 5, wherein the pebble coarse particles 4 are used as main load-bearing carriers of the pebble layer 2, and the strength requirement of the pebble layer 2 is ensured; the particle size of the pebble coarse particles 4 is 6cm-20cm, the pebble coarse particles with the particle size of 6cm-20cm meet the requirements of the seismic mitigation and isolation system on shear strength and rigidity, and the particle size of the fine sand particles 5 is 0.075cm-6 cm.
The pipeline well 9 extends into the pebble bed 2, the bottom of the pipeline well 9 is lower than the water level 11 of the cavity in the cavity 1, the bottom of the pipeline well 9 is positioned from the middle position to the bottom position in the depth direction of the pebble bed 2, and preferably the bottom of the pipeline well 9 is positioned in the middle position in the depth direction of the pebble bed 2; in particular, the pipe well 9 is a drilled well.
The liquid pumping and injecting device is used for injecting liquid into the cavity 1 or pumping liquid, the liquid pumping and injecting device comprises a liquid storage unit 16, a power pump 12 and a well pipe 10 arranged in the pipeline well 9, the power pump 12 and the liquid storage unit 16 are communicated through a pipeline 8, the power pump 12 and the well pipe 10 are communicated through the pipeline 8, the reservoir unit 16 is used for storing a standby liquid 17, the reservoir unit 16 may comprise at least one reservoir, the spare liquid 17 is water, polyester polyol liquid or multi-element halide liquid, the power pump 12 is used for injecting the spare liquid 17 into the pebble layer 2 to become pore liquid 6 or pumping the pore liquid 6 into the liquid storage unit 16, a control valve 18 is arranged on the pipeline 8 between the power pump 12 and the liquid storage unit 16 to open and close the communication between the power pump 12 and the liquid storage unit 16.
The top end of the well pipe 10 is connected with the power pump 12, the bottom end of the well pipe 10 is lower than the water level 11 of the accommodating cavity, a plurality of water seepage holes are formed in the pipe wall of the well pipe 10, the water seepage holes are round holes or square holes, and particularly, the well pipe 10 is a steel well pipe.
As a preferable solution of this embodiment, the power pump 12 is a bidirectional pump, and the bidirectional pump can be used for liquid injection and liquid extraction; or the power pump 12 is two one-way pumps, one-way pump is used for filling liquid, and the other one-way pump is used for pumping liquid.
The seismic isolation and reduction system comprises a plurality of power pumps 12, wherein the power pumps 12 are arranged in parallel and/or in series, so that the pump liquid conveying efficiency is improved.
The pipe shoe of the pipeline well 9 is connected with the steel well pipe through a bolt or welded, the construction method of the drilling well is that, the hydraulic central drilling tool realizes impact drilling under the action of the gravity impactor, the hole expanding drilling tool with expansion and contraction functions is used for expanding the hole of the well wall to form the pipeline well 9, the outer side of the reaming drilling tool is provided with a pipe shoe, the top end of the pipe shoe is fixed with the well pipe in a bolt connection or welding mode, in the process of impact drilling of the reaming drilling tool and the hydraulic central drilling tool, a well wall formed by a pipe shoe and the well pipe 10 sinks under the action of gravity, when the drilling depth reaches the designed position (middle position) in the pebble layer 2, the drill bit of the reaming drilling tool is folded, the reaming drilling tool, the hydraulic central drilling tool and the down-the-hole hammer are put out of the pipeline well 9 to be realized as a well, and the steps are repeated to realize the pipeline well 9 array.
Through the liquid pumping and injecting device, the water level 11 of the cavity in the cavity 1 is kept within a certain range, the foundation 01 settlement caused by the decline of the underground water level is avoided, the slurry content of the pebble layer 2 can be dynamically controlled, the technical problem that the seismic performance of the building structure 20 under the earthquake excitation is poor under the condition of a complex stratum is solved, the method is simple and convenient to operate, high in economic efficiency and good in energy dissipation and shock absorption effect, the pebble layer 2 can be guaranteed to meet the expected energy dissipation and shock absorption requirements under the earthquake excitation, and the earthquake disaster degree of the building structure 20 is effectively reduced.
The control device 19 comprises a computer, the control device 19 is connected with the liquid pumping and injecting device, and the control device 19 is used for controlling the liquid pumping and injecting device to inject liquid into the cavity 1 or pump liquid so as to control the quality of the pebble bed 2.
The data monitoring device is connected with the control device 19 and comprises an acceleration sensor 15, a liquid density sensor 14 and a liquid pressure sensor 13, and the data monitoring device is used for monitoring the displacement of the building structure 20 under the action of seismic excitation and the quality of the pebble bed 2 and transmitting the data of the displacement and the quality to the control device 19.
The acceleration sensors 15 are arranged on the building structure 20, for low-rise buildings, at least one acceleration sensor 15 can be arranged on each floor, for high-rise buildings, at least one acceleration sensor 15 can be arranged on at least three floors of the upper floor, the acceleration can be calculated by a computer to calculate the displacement, namely, the acceleration sensors 15 can be used for acquiring the top displacement amplitude and/or the interlayer displacement of the building structure 20 to monitor the displacement of the building structure 20 under the action of earthquake excitation.
The liquid density sensor 14 is arranged in the pebble layer 2, and is specifically arranged on the outer wall of the well pipe 10; because the pebble bed 2 has a certain volume, the mass of the liquid can be increased by increasing the density of the liquid in the pebble bed 2, so that the mass of the pebble bed 2 is increased, and the mass of the pebble bed 2 can be indirectly calculated by monitoring the density of the liquid in the pebble bed 2 through the liquid density sensor 14; specifically, the mass of the whole pebble bed 2 can be calculated by acquiring the density and the volume of the injected liquid and controlling the volume and the density of the pebble bed 2 previously.
The liquid pressure sensor 13 is arranged in the pebble layer 2, and is specifically arranged at the bottom of the pipeline well 9; because the volume of the pebble layer 2 is fixed, the mass of liquid can be increased by increasing the volume of the pore liquid 6 among the pebble coarse particles in the pebble layer 2, so that the mass of the pebble layer 2 is increased, and therefore the water level 11 of the accommodating cavity can be indirectly calculated by monitoring the water pressure in the pebble layer 2 through the liquid pressure sensor 13, and the mass of the pebble layer 2 can be obtained.
Through the control device 19 and the data monitoring device, the data monitoring device can monitor the damping effect of the pebble bed 2 on the building structure 20 under the action of seismic excitation in real time, and feed back data to the control device 19 in real time, the control device 19 controls the liquid pumping and injecting device to inject or pump liquid into the accommodating cavity 1 according to the damping effect, so that the quality of the pebble bed 2 is dynamically corrected, and the optimal damping performance is obtained.
Compared with the traditional damping system, the damping system has the following advantages: on one hand, the pebble layer 2 is utilized, the bearing performance is good, the pores among the pebbles are large, and the water storage capacity is large; on the other hand, the mass of the pebble layer 2 can be changed by pumping and injecting liquid into the pebble layer 2 in the cavity 1 with a certain volume, so that the adjustment of the inertia force of the pebble layer 2 and the adjustment of the natural vibration frequency are realized, the inertia of the pebble layer 2 is changed while the bearing performance of the pebble layer 2 is basically not changed, the pebble particles and the liquid among the particles interact, the resonance effect and the liquid shaking friction energy dissipation are realized through the movement of the pebble layer 2, the vibration response of a building structure is reduced, the shock absorption and energy dissipation efficiency of the system is greatly improved, and the earthquake disaster; the seismic isolation and reduction system has pioneering engineering significance and practical value.
Example 2
As shown in fig. 1 to 4, the method for constructing a seismic isolation and reduction system according to the present invention is used for constructing the seismic isolation and reduction system according to embodiment 1, and includes the following steps:
A. as shown in fig. 1, a pit is dug on a foundation 01, and the surface of the pit is subjected to waterproof treatment to form a cavity 1;
B. reinforcing the foundation 01;
C. as shown in fig. 2-3, filling a pebble layer 2 and a soft clay layer 3 in the cavity 1, wherein the soft clay layer 3 is positioned at the top of the pebble layer 2, the top of the soft clay layer 3 is flush with the top of the foundation 01, and the pebble layer 2 is used as the foundation of a building structure 20;
D. a pipeline well 9 is constructed and arranged in the cavity 1, the pipeline well 9 extends into the pebble bed 2, and the bottom of the pipeline well 9 is lower than the cavity water level 11 in the cavity 1;
E. arranging a well pipe 10 in the pipeline well 9, wherein the bottom end of the well pipe 10 is lower than the water level 11 of the accommodating cavity, the top end of the well pipe 10 is connected with a pipeline 8, the pipeline 8 is connected with a power pump 12, the power pump 12 is connected with a liquid storage unit 16, and standby liquid 17 is stored in the liquid storage unit 16;
the power pump 12 is used for injecting the standby liquid 17 into the pebble layer 2 or pumping the pore liquid 6 in the pebble layer 2 into the liquid storage unit 16;
F. the power pump 12 is connected with a control device 19, the control device 19 is connected with a data monitoring device, and the data monitoring device comprises an acceleration sensor 15, a liquid density sensor 14 and a liquid pressure sensor 13; the acceleration sensor 15 is arranged on the building structure 20, and the liquid density sensor 14 and the liquid pressure sensor 13 are arranged in the pebble bed 2.
The construction method of the seismic isolation and reduction system utilizes the characteristic of pebbles, adopts the conventional technical means for pit digging and waterproof treatment, is convenient to construct, has low manufacturing cost, and is suitable for different foundation 01 conditions.
Example 3
As shown in fig. 1-6, the method for implementing the seismic isolation and reduction system according to any one of the above embodiments of the present invention,
establishing a numerical model of the building structure 20 by using numerical simulation software, and performing modal analysis to obtain a natural vibration period and/or a natural vibration frequency of the building structure 20;
establishing a numerical model of the pebble layer 2 in the cavity 1 by using numerical simulation software, and performing modal analysis to obtain the natural vibration period and/or the natural vibration frequency of the pebble layer 2;
comparing the natural vibration period and/or the natural vibration frequency of the building structure 20 with the natural vibration period and/or the natural vibration frequency of the pebble bed 2 to obtain the difference value of the natural vibration period and/or the natural vibration frequency of the building structure 20 and the pebble bed 2;
the control device 19 obtains the preset quality of the pebble layer 2 according to the difference, the control device 19 controls the power pump 12 to inject or extract liquid into the cavity 1, the liquid density of the pebble layer 2 and/or the height of the cavity water level 11 are/is adjusted, the quality of the pebble layer 2 reaches the preset value through monitoring of the liquid density sensor 14 and the liquid pressure sensor 13, and therefore the natural vibration period and/or the natural vibration frequency of the pebble layer 2 are/is changed, and the natural vibration frequency of the pebble layer 2 reaches [0.8, 1.2] of the natural vibration frequency of the building structure 20;
then, under the action of seismic excitation, monitoring the data index of the top layer displacement amplitude and/or the interlayer displacement of the building structure 20 through the acceleration sensor 15, and judging whether the pebble layer 2 with the changed mass plays a role in shock absorption or not;
if the damping effect is not expected, the control device 19 controls the power pump 12 to inject or pump liquid into the cavity 1 according to the data index, and the mass of the pebble bed 2 is dynamically corrected, so that the optimal damping performance is finally realized.
As shown in fig. 5 and 6, the comparison graphs (peak acceleration and displacement) of the damping effect of the pebble bed 2 at different liquid levels are utilized, the displacement data of the building structure 20 are monitored by the acceleration sensor 15, and analysis shows that after the liquid pumping and injecting device is used for injecting liquid into the pebble bed 2, the damping effect of the pebble bed 2 is more obvious along with the time, and the more liquid injection is carried out, even the quality of the pebble bed 2 is improved more, so that the self-vibration frequency of the pebble bed 2 is close to the self-vibration frequency of the building structure 20, and the damping effect is quite obvious compared with the situation of no liquid injection.
By applying the implementation method of the seismic isolation and reduction system, the self-vibration frequency of the pebble bed 2 can be close to the self-vibration frequency of the building structure 20, so that the pebble bed 2 in the cavity 1 with a certain volume is simulated into an ultra-large tuned liquid damper to obtain the optimal seismic isolation and reduction control effect.
Example 4
An electronic device according to the present invention includes:
a memory having a computer program stored thereon;
a processor for executing the program in the memory to implement the method for implementing the seismic mitigation and isolation system according to embodiment 3.
As a preferable aspect of the present embodiment, the electronic device may include: a processor, a memory, the electronic device may further include one or more of a multimedia component, an input/output (I/O) interface, and a communication component.
The processor is used for controlling the overall operation of the electronic equipment so as to complete all or part of the steps in the processing method or the display method.
The memory is used to store various types of data to support operation at the electronic device, which may include, for example, instructions for any application or method operating on the electronic device, as well as application-related data; the Memory may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.
The multimedia components may include a screen, which may be, for example, a touch screen, and an audio component for outputting and/or inputting audio signals; for example, the audio component may include a microphone for receiving external audio signals, and the received audio signals may be further stored in the memory or transmitted through the communication component; the audio assembly also includes at least one speaker for outputting audio signals.
The I/O interface provides an interface between the processor and other interface modules, wherein the other interface modules can be a keyboard, a mouse, buttons and the like; these buttons may be virtual buttons or physical buttons.
The communication component is used for carrying out wired or wireless communication between the electronic equipment and other equipment; wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G or 5G, or a combination of one or more of them, so that the corresponding Communication component may comprise: Wi-Fi module, bluetooth module, NFC module, cell-phone communication module.
As a preferred embodiment of the present invention, the electronic Device may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components, and is configured to execute the method for implementing the seismic mitigation and isolation system.
Example 5
A computer-readable storage medium according to the present invention stores thereon a computer program, which when executed by a processor implements an implementation method of the seismic mitigation and isolation system according to embodiment 3.
The computer-readable storage medium provided in this embodiment may be the memory described in embodiment 4 and including the program instructions, where the program instructions may be executed by a processor of an electronic device to implement the method for implementing the seismic mitigation and isolation system.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (35)
1. The utility model provides a subtract shock insulation system which characterized in that, includes takes out priming device and locates appearance chamber (1) on ground (01), fill in appearance chamber (1) and have filled pebble layer (2), hold liquid in appearance chamber (1), take out priming device be used for to hold chamber (1) notes liquid or drawing liquid, pebble layer (2) are used for the ground as building structure (20).
2. Seismic isolation system according to claim 1, wherein the walls of the housing (1) are concrete walls or reinforced concrete walls.
3. Seismic isolation system according to claim 1, wherein the cavity (1) is filled with a soft clay layer (3), and the soft clay layer (3) is positioned on top of the pebble layer (2).
4. Seismic isolation system according to claim 1, wherein the pebble layer (2) comprises pebble coarse particles (4) and fine sand particles (5).
5. Seismic isolation system according to claim 4, wherein the pebble coarse particles (4) have a particle size of 6cm to 20 cm.
6. Seismic isolation system according to claim 4, wherein the fine sand grains (5) have a grain size of 0.075cm to 6 cm.
7. The seismic isolation system according to claim 1, wherein the liquid injection device comprises:
a liquid storage unit (16) for storing a backup liquid (17);
the power pump (12) is communicated with the liquid storage unit (16) and the pebble layer (2), and the power pump (12) is used for injecting the standby liquid (17) into the pebble layer (2) to become pore liquid (6) or sucking the pore liquid (6) into the liquid storage unit (16).
8. Seismic isolation system according to claim 7, wherein said power pump (12) is a bidirectional pump that can be used for filling and pumping;
or the power pump (12) is two one-way pumps, one-way pump is used for filling liquid, and the other one-way pump is used for pumping liquid.
9. Seismic isolation system according to claim 7, characterized in that it comprises a plurality of said power pumps (12), said power pumps (12) being arranged in parallel and/or in series.
10. Seismic isolation system according to claim 7, wherein the power pump (12) and the liquid storage unit (16) are communicated through a pipeline (8), and the power pump (12) and the pebble layer (2) are communicated through the pipeline (8).
11. Seismic isolation system according to claim 10, wherein a control valve (18) is provided on the conduit (8) between the power pump (12) and the reservoir unit (16).
12. Seismic isolation system according to claim 7, further comprising a piping well (9), said piping well (9) penetrating into said pebble bed (2).
13. Seismic isolation system according to claim 12, wherein the bottom of the pipe well (9) is located from a middle position to a bottom position in the depth direction of the pebble bed (2).
14. Seismic isolation system according to claim 12, wherein the piping well (9) is a drilling well.
15. Seismic isolation system according to claim 12, wherein a well pipe (10) is arranged in the pipeline well (9), and the top end of the well pipe (10) is connected with the power pump (12).
16. Seismic isolation system according to claim 7, wherein the liquid storage unit (16) comprises at least one liquid storage tank.
17. Seismic isolation system according to claim 7, wherein the backup liquid (17) is a water body, a polyester polyol liquid or a polyhalogenated liquid.
18. The seismic isolation and reduction system according to any one of claims 1 to 17, further comprising a control device (19), wherein the control device (19) is connected with the liquid pumping device, and the control device (19) is used for controlling the liquid pumping device to inject or pump liquid into the cavity (1).
19. Seismic isolation system according to claim 18, wherein said control means (19) comprise a computer.
20. Seismic isolation system according to claim 18, further comprising a data monitoring device connected to the control device (19) for monitoring the displacement of the building structure (20) under seismic excitation and for monitoring the quality of the pebble bed (2) and transmitting data of the displacement and the quality to the control device (19).
21. Seismic isolation system according to claim 20, wherein said data monitoring device comprises an acceleration sensor (15), said acceleration sensor (15) being provided on said building structure (20).
22. Seismic isolation system according to claim 20, wherein the data monitoring device comprises a liquid density sensor (14), the liquid density sensor (14) being provided within the pebble bed (2).
23. Seismic isolation system according to claim 20, wherein said data monitoring means comprise a hydraulic pressure sensor (13), said hydraulic pressure sensor (13) being provided in said pebble bed (2).
24. A construction method of a seismic isolation and reduction system is characterized in that,
digging a pit on the foundation (01), and performing waterproof treatment on the surface of the pit to form a containing cavity (1);
filling a pebble layer (2) in the cavity (1), wherein the pebble layer (2) is used as a foundation of a building structure (20);
set up well casing (10) in appearance chamber (1), well casing (10) are deepened cobble layer (2), well casing (10) top connecting line (8), stock solution unit (16) is connected in pipeline (8), reserve liquid (17) are stored in stock solution unit (16).
25. Construction method according to claim 24, characterized in that the foundation (01) is reinforced after excavation.
26. A construction method according to claim 24, wherein the pipeline (8) is connected with a power pump (12), the power pump (12) is connected with the liquid storage unit (16), and the power pump (12) is used for injecting the standby liquid (17) into the pebble bed (2) or pumping pore liquid (6) in the pebble bed (2) into the liquid storage unit (16).
27. Construction method according to claim 24, wherein the power pump (12) is connected to a control device (19), the control device (19) being connected to a data monitoring device comprising an acceleration sensor (15), a liquid density sensor (14) and a liquid pressure sensor (13);
the acceleration sensor (15) is arranged on the building structure (20), and the liquid density sensor (14) and the liquid pressure sensor (13) are arranged in the pebble layer (2).
28. Construction method according to any one of claims 24-27, characterised in that a pipe well (9) is arranged in the cavity (1) and that a well pipe (10) is located in the pipe well (9).
29. A method for implementing a seismic isolation system as claimed in any one of claims 1 to 23,
acquiring a natural vibration period and/or a natural vibration frequency of the building structure (20);
acquiring the natural vibration period and/or the natural vibration frequency of the pebble layer (2) in the cavity (1);
and injecting or pumping liquid into the cavity (1) through the liquid pumping and injecting device so as to change the mass of the pebble layer (2), thereby changing the natural vibration period and/or the natural vibration frequency of the pebble layer (2) and enabling the natural vibration frequency of the pebble layer (2) to reach 0.8, 1.2 of the natural vibration frequency of the building structure (20).
30. The implementation method of claim 29,
obtaining the difference value of the self-vibration period and/or the self-vibration frequency of the building structure (20) and the pebble layer (2) according to the self-vibration period and/or the self-vibration frequency of the building structure (20) and the self-vibration period and/or the self-vibration frequency of the pebble layer (2);
and determining that the liquid pumping and injecting device injects or pumps liquid into the pebble bed (2) according to the difference.
31. A method as claimed in claim 29, characterized by establishing a numerical model of the building structure (20) and performing a modal analysis to obtain the natural vibration period and/or the natural vibration frequency of the building structure (20).
32. An implementation method according to claim 29, characterized in that a numerical model of the pebble bed (2) in the cavity (1) is established, and a modal analysis is performed to obtain the natural vibration period and/or the natural vibration frequency of the pebble bed (2).
33. The implementation method according to any of the claims 29 to 32,
after the natural vibration frequency of the pebble layer (2) reaches [0.8, 1.2] of the natural vibration frequency of the building structure (20), under the action of seismic excitation, whether the pebble layer (2) with changed mass plays a role in shock absorption is judged by monitoring the data index of the top layer displacement amplitude and/or the interlayer displacement of the building structure (20);
and if the damping effect is not expected, dynamically correcting the quality of the pebble layer (2) according to the data index.
34. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the program in the memory to implement the method of any of claims 29-33.
35. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 29 to 33.
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