CN101498221A - City underground engineering construction safety risk dynamic control method - Google Patents
City underground engineering construction safety risk dynamic control method Download PDFInfo
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- CN101498221A CN101498221A CNA2009100782351A CN200910078235A CN101498221A CN 101498221 A CN101498221 A CN 101498221A CN A2009100782351 A CNA2009100782351 A CN A2009100782351A CN 200910078235 A CN200910078235 A CN 200910078235A CN 101498221 A CN101498221 A CN 101498221A
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Abstract
The invention relates to a dynamic control method for construction safety risk of city underground engineering, which includes the following steps of estimating the prior condition of the original structure and evaluating the safety, determining the safety control standard of the important building in the range influenced by the construction, predicating the construction influence, determining the construction scheme, determining the optimized construction scheme of the minimum additional influence, enacting and implementing the process control scheme, namely degrading the control object of deposition or stress under the set construction scheme, clearing the control object of each step, monitoring measurement, feeding back information, particularly monitoring the key construction part and the key construction step, judging the engineering safety, making reaction on the construction measure in time, and estimating after the construction and repairing the structural state, namely, after the construction is completed, the necessity, the feasibility and the economic reasonability of the repair are analyzed and estimated to provide corresponding schemes, measures and proposals. The invention is suitable for the safety risk control of the construction of the complex city underground engineering and enables the risk management to be scientific and standardized.
Description
Technical field
The present invention relates to a kind of city underground engineering construction safety risk dynamic control method, belong to the underground structrue engineering technical field.
Background technology
City underground engineering is compared with the ground surface works project, because the complexity and the uncertainty of its medium of living in, and urban population density is excessive with building density, thereby in the very big risk of construction period existence.In the engineering construction because artificial or non-artificial factor causes engineering accident, thereby cause tremendous economic loss, cause that the example of serious social influence is too numerous to enumerate.Both at home and abroad in the exploitation of urban underground space big accident takes place repeatedly, cause great casualties and heavy economic loss, and society stable brought certain negative influence in recent years.
Because China's urban underground space developing history is shorter, lack experience, in construction, exist some problem that can not be ignored and hidden dangers, the potential technology risk is lacked essential analysis and demonstration, and people are not enough to objective law understanding, manage not in place, in Shanghai, subway engineering security incident in various degree all appearred in Beijing and other cities, great casualties and heavy economic loss have been caused, and society stable brought certain negative influence, these engineering accidents also are our alarm bell that city underground engineering safety builds of having rung when leaving people's bitter lesson for.Under these circumstances, carry out urban underground engineering construction security risk Research on Control, inquire into the content of underground construction safety and risk management, the technological means of research risk evaluation index, standard and risk averse and method are set up urban underground engineering construction security evaluation management system, adopt scientific and rational technological means and method, various risks are controlled, by prediction and prevention, the incidence of risk and risk loss are reduced to bottom line, be very in good time and necessary.
The research of the environmental risk that underground engineering construction is caused at present mainly concentrates on risk discrimination method and the methods of risk assessment, risk assessment and analytical method commonly used mainly contain: based on the expert survey of confidence index, fuzzy comprehensive evaluation method, analytic hierarchy process (AHP), failure tree analysis (FTA) method etc.And after assessment, how provide aspect corresponding risk control measure and the bypassing method also imperfection from technological layer, can not form complete risk control system.
The present invention is directed to the risk in the city underground engineering construction, proposed to distribute the security risk control method that is controlled to be core, by the construction safety in feedback information, process control and the construction of process recovery assurance city underground engineering with heterotaxis.In order to overcome the deficiency of prior art structure, the invention provides a kind of city underground engineering security risk kinetic controlling equation method.
Summary of the invention
The objective of the invention is to be achieved through the following technical solutions.
City underground engineering construction safety risk dynamic control method comprises following five steps:
Step 1: the As-Is Assessment of existing structure and safety evaluatio, carry out on-site investigation for the existing important building in the construction infection scope: the position relation in building type, present circumstances and tunnel, carrying out safety analysis under various typical variant patterns calculates, draw building non-deformability P, determine ultimate strength thus, can provide control criterion after taking all factors into consideration safety factor; For complex large-sized underground structure, should provide the distortion and the stressed control criterion of temporary structure under the various unfavoured states, thereby in work progress, early warning and warning be carried out in safety by monitoring.
Step 2: construction infection prediction and constructure scheme are determined, take all factors into consideration geological conditions, Tunnel Design parameter and condition of construction and carry out analytical calculation, draw constructing tunnel and cause malformation predicted value S.Based on feasible constructure scheme influence is predicted, to determine the constructure scheme of added influence minimum, and when the construction added influence can not satisfy requiring of control criterion, then should take preliminary treatment measures such as grouting and reinforcing, also can propose reinforce requirement to structure, its target is that added influence reaches construction standard and can accept, and controls when requiring when added influence can't reach whole, can consider to adopt " process recovery " means, to guarantee that totally controlling target does not transfinite.
Step 3: the formulation of process control scheme and enforcement, when building non-deformability P causes malformation predicted value S more than or equal to constructing tunnel, formulate each stage controlling value C according to the displacement distribution principle
i, improve construction otherwise need to adopt, improve the building consolidation effect, means such as fulfillment process recovery guarantee the safety of existing structure in construction.
Step 4: monitoring measurement and feedback information: i is construction step preface, when i=1, begin construction, to each construction step, according to engineering characteristic and control emphasis, select the emphasis control index enforcement overall process monitoring of key position, can carry out online or remote real time monitoring, monitored data is handled also feedback in time in real time in the crucial construction stage; According to construction monitoring value M
iMonitoring result is worked as M
i≤ C
iThe time, analyze reason and strengthen working measure, and combine with work progress, the safety of engineering is made an appraisal and judge by network analysis, thereby on working measure, in time react.
Step 5: assessment and structural behavior reparation behind the worker, after constructing tunnel is finished, objectively to impact existing subway structure inevitably, or the function of use of structure is caused some infringements, therefore tackle the degree that is impacted and make an appraisal; According to the degree of infringement necessity, feasibility and the economic rationality recovered are made simultaneously and analyzing and assessment, and provide corresponding recovery scheme, measure and suggestion in view of the above.
The invention has the beneficial effects as follows:
(1) is applicable to the control of complicated urban underground engineering construction security risk, passes through existing building, pipeline, plastid etc. poorly such as: tunnel;
(2) it is scientific the city underground engineering risk management to be had more, and makes and the operability of control measure finally realize the standardization of underground engineering construction safety risk management;
(3) under job practices of drafting and engineering specifications, in conjunction with engineering reality, monitoring achievement and theory analysis and the numerical simulation result of the past, deflection to each construction stage decomposes, being about to overall goal is decomposed into phase targets and controls, realization by stage control target reaches the control to overall goal, thereby has guaranteed the Environmental security of city underground engineering construction.
Description of drawings
The working plan that Fig. 1 dynamically controls for city underground engineering construction safety risk of the present invention;
Fig. 2 is prediction, the monitoring curve figure of existing structure sedimentation in the work progress of the present invention.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Wear the subway interval under certain city underground station and be listed in superfine risk point, the shallow burial hidden digging construction is adopted at this station, strides formula tunneling station, island for twin columns three, and the two ends, station are double-decker, and the centre is a single layer structure, station overall width 24.2m.The width that the station individual layer passes through existing subway is 16.5m, and clear distance 1.98m only applies big pipe shed support between the old and new's structure between two structures.In order to guarantee that newly-built station passes through the safety in existing interval, adopted the security risk kinetic controlling equation method among the present invention.
(1) as shown in Figure 1, the As-Is Assessment of existing structure and safety evaluatio, take all factors into consideration existing subway type, relation between existing subway present circumstances and existing subway and the newly-built station, analysis by existing structure and operation security, provided structure sediment respectively, the control criterion of horizontal distortion and railway roadbed disengaging value, the maximum settlement value of final selected structure and relative settlement value are as the control index, wherein the maximum settlement permissible value is 40mm, consider certain safety stock, adopt 36mm as the settlement Control value at last, early warning value 22mm, alarming value are 32mm.
(2) construction infection prediction and constructure scheme are determined, big section shallow buried covered excavation subway station can be adopted post hole method, middle hole method and the construction of side hole method usually, maximum settlement amount with existing structure is a target for this reason, these three kinds of feasible constructure scheme are carried out forecast analysis, realize optimization thus job practices.Adopt above-mentioned three kinds of constructure scheme, the final settlement of existing line structure is respectively: 35mm, 47mm, 62mm.As seen the settling amount minimum of structure when adopting the method construction of post hole.Therefore choose the construction of post hole method as final newly-built station.
(3) shown in the curve among Fig. 21, the formulation of process control scheme and enforcement, in the digging process of subway station, the final settlement of existing interval structure is formed by all multiple operation accumulative total, and all there is its corresponding sedimentation value control criterion in each stage.Draft out the existing structure Deformation control desired value of different construction stages by computational analysis, form the control scheme, at this moment can carry out the construction of subway station according to the scheme of drafting.
(4) shown in the curve among Fig. 22, monitoring measurement and feedback information, in work progress, sedimentation and distortion to existing structure of the subway adopt hydrostatic level to carry out real-time monitoring, finish when hole, both sides Guan Peng applies, and the structure sediment value reaches 30mm, still in control range, but at this moment implemented structure lifting slip casting before digging for the operation standard that improves circuit in that side is wide open, i.e. " process recovery " makes that side is wide open to dig, support the back structure sediment value that finishes and return to 14.76mm.
(5) shown in the curve among Fig. 22, assessment and structural behavior reparation behind the worker, after newly-built station construction was finished, existing interval structure sedimentation value was 18.42mm; After implemented side hole slip-casting lifting once more after the assessment behind the worker, promptly " recover behind the worker ", the final structure sedimentation value is 14.85mm.
Claims (1)
1. city underground engineering construction safety risk dynamic control method, it is characterized in that: this method comprises following five steps:
Step 1: the As-Is Assessment of existing structure and safety evaluatio, carry out on-site investigation for the existing important building in the construction infection scope: the position relation in building type, present circumstances and tunnel, carrying out safety analysis under various typical variant patterns calculates, draw building non-deformability P, determine ultimate strength thus, consider to provide control criterion after the safety factor; For complex large-sized underground structure, should provide the distortion and the stressed control criterion of temporary structure under the various unfavoured states, thereby in work progress, early warning and warning be carried out in safety by monitoring;
Step 2: construction infection prediction and constructure scheme are determined, influence factor determines to take all factors into consideration geological conditions, Tunnel Design parameter and condition of construction are carried out analytical calculation, draw constructing tunnel and cause malformation predicted value S, based on feasible constructure scheme influence is predicted, to determine the constructure scheme of added influence minimum, and when the construction added influence can not satisfy requiring of control criterion, then should take preliminary treatment measures such as grouting and reinforcing, also can propose to reinforce requirement to structure, its target is that added influence reaches construction standard and can accept, and when added influence can't reach whole control and requires, can consider to adopt " process recovery " means, to guarantee that totally controlling target does not transfinite;
Step 3: the formulation of process control scheme and enforcement, when building non-deformability P causes malformation predicted value S more than or equal to constructing tunnel, formulate each stage controlling value C according to the displacement distribution principle
i, improve construction otherwise need to adopt, improve the building consolidation effect, means such as fulfillment process recovery guarantee the safety of existing structure in construction;
Step 4: monitoring measurement and feedback information, i is construction step preface, when i=1, begin construction, to each construction step,, select the emphasis control index of key position to implement the overall process monitoring according to engineering characteristic and control emphasis, can carry out online or remote real time monitoring in the crucial construction stage, monitored data is handled and timely feedback in real time; According to construction monitoring value M
iMonitoring result is worked as M
i≤ C
iThe time, analyze reason and strengthen working measure, and combine with work progress, the safety of engineering is made an appraisal and judge by network analysis, thereby on working measure, in time react;
Step 5: assessment and structural behavior reparation behind the worker, after constructing tunnel is finished, objectively to impact existing subway structure inevitably, or the function of use of structure is caused some infringements, therefore tackle the degree that is impacted and make an appraisal; According to the degree of infringement necessity, feasibility and the economic rationality recovered are made simultaneously and analyzing and assessment, and provide corresponding recovery scheme, measure and suggestion in view of the above.
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| CN102434209A (en) * | 2011-11-03 | 2012-05-02 | 上海理工大学 | Monitoring method for influence on adjacent existing structures from tunnel excavation |
| CN102609774A (en) * | 2012-01-31 | 2012-07-25 | 华中科技大学 | System and method for identifying and reasoning security risks of metro construction |
| CN102619531A (en) * | 2012-03-06 | 2012-08-01 | 北京交通大学 | Multi-step sequence construction deformation control method for shallow-buried tunnel with big cross section |
| CN102900441A (en) * | 2012-09-18 | 2013-01-30 | 铁道部经济规划研究院 | China tunnel construction method based on complete deformation control of surrounding rocks |
| CN102999695A (en) * | 2012-10-31 | 2013-03-27 | 华中科技大学 | Subway construction safety risk identification and evaluation system and working method thereof |
| CN103093400A (en) * | 2013-01-24 | 2013-05-08 | 华中科技大学 | Adjacent building safety quantitative evaluation method in tunnel construction |
| CN103225510A (en) * | 2013-03-22 | 2013-07-31 | 上海建科工程咨询有限公司 | Construction method of tunnel construction risk map for TBM (tunnel boring machine) |
| CN106649912A (en) * | 2016-09-06 | 2017-05-10 | 中铁十六局集团北京轨道交通工程建设有限公司 | Settlement prediction method for metro tunnel shield undercrossing existing railway facilities |
| CN108520355A (en) * | 2018-04-09 | 2018-09-11 | 中铁十二局集团第二工程有限公司 | Building As-Is Assessment method is worn under complex conditions hydraulic tunnel |
| CN108643937A (en) * | 2018-04-27 | 2018-10-12 | 中铁十二局集团有限公司 | The prevention restoration methods of residential area are worn under hydraulic tunnel |
| CN109978378A (en) * | 2019-03-28 | 2019-07-05 | 北京市市政工程研究院 | A kind of new construction passes through the work post evaluation method of existing road equipment |
| CN110008562A (en) * | 2019-03-28 | 2019-07-12 | 北京交通大学 | Damaging judge method after the work of existing road equipment based on monitoring control irrelevance |
| CN111058855A (en) * | 2019-11-11 | 2020-04-24 | 北京住总集团有限责任公司 | Deformation control method and evaluation system for shield underpassing structure |
| CN111368016A (en) * | 2020-02-28 | 2020-07-03 | 重庆市勘测院 | Multi-threshold-constrained rail transit control protection area spatial information extraction and analysis method |
| CN111457889A (en) * | 2020-06-02 | 2020-07-28 | 中际物联科技（深圳）有限公司 | Method for monitoring subway tunnel settlement through optical fiber static level |
| CN112257154A (en) * | 2020-10-20 | 2021-01-22 | 北京交通大学 | Urban tunnel transparent construction monitoring method and system |
| CN112983548A (en) * | 2021-03-05 | 2021-06-18 | 四川省建筑科学研究院有限公司 | Underground construction monitoring and early warning method, device, server and system |
| CN113886913A (en) * | 2021-09-18 | 2022-01-04 | 中铁十八局集团有限公司 | Method for reinforcing equivalent stiffness of underground engineering connection |
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- 2009-02-23 CN CN2009100782351A patent/CN101498221B/en not_active Expired - Fee Related
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| CN102434209A (en) * | 2011-11-03 | 2012-05-02 | 上海理工大学 | Monitoring method for influence on adjacent existing structures from tunnel excavation |
| CN102609774A (en) * | 2012-01-31 | 2012-07-25 | 华中科技大学 | System and method for identifying and reasoning security risks of metro construction |
| CN102609774B (en) * | 2012-01-31 | 2014-05-07 | 华中科技大学 | System and method for identifying and reasoning security risks of metro construction |
| CN102619531A (en) * | 2012-03-06 | 2012-08-01 | 北京交通大学 | Multi-step sequence construction deformation control method for shallow-buried tunnel with big cross section |
| CN102900441A (en) * | 2012-09-18 | 2013-01-30 | 铁道部经济规划研究院 | China tunnel construction method based on complete deformation control of surrounding rocks |
| CN102900441B (en) * | 2012-09-18 | 2016-01-20 | 铁道部经济规划研究院 | Based on country rock be badly deformed control China tunnel construction method |
| CN102999695A (en) * | 2012-10-31 | 2013-03-27 | 华中科技大学 | Subway construction safety risk identification and evaluation system and working method thereof |
| CN103093400B (en) * | 2013-01-24 | 2017-04-26 | 华中科技大学 | Adjacent building safety quantitative evaluation method in tunnel construction |
| CN103093400A (en) * | 2013-01-24 | 2013-05-08 | 华中科技大学 | Adjacent building safety quantitative evaluation method in tunnel construction |
| CN103225510A (en) * | 2013-03-22 | 2013-07-31 | 上海建科工程咨询有限公司 | Construction method of tunnel construction risk map for TBM (tunnel boring machine) |
| CN103225510B (en) * | 2013-03-22 | 2016-05-18 | 上海建科工程咨询有限公司 | A kind of construction method of rock tunnel(ling) machine the risk of tunnel construction map |
| CN106649912A (en) * | 2016-09-06 | 2017-05-10 | 中铁十六局集团北京轨道交通工程建设有限公司 | Settlement prediction method for metro tunnel shield undercrossing existing railway facilities |
| CN108520355A (en) * | 2018-04-09 | 2018-09-11 | 中铁十二局集团第二工程有限公司 | Building As-Is Assessment method is worn under complex conditions hydraulic tunnel |
| CN108643937A (en) * | 2018-04-27 | 2018-10-12 | 中铁十二局集团有限公司 | The prevention restoration methods of residential area are worn under hydraulic tunnel |
| CN108643937B (en) * | 2018-04-27 | 2020-01-31 | 中铁十二局集团有限公司 | Prevention and recovery method for hydraulic tunnel lower-crossing residential area |
| CN109978378A (en) * | 2019-03-28 | 2019-07-05 | 北京市市政工程研究院 | A kind of new construction passes through the work post evaluation method of existing road equipment |
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| CN109978378B (en) * | 2019-03-28 | 2020-11-20 | 北京市市政工程研究院 | Post-construction evaluation method for new construction to pass through existing road facilities |
| CN113153335A (en) * | 2019-11-11 | 2021-07-23 | 北京住总集团有限责任公司 | Safety management system for shield downward penetration |
| CN111058855A (en) * | 2019-11-11 | 2020-04-24 | 北京住总集团有限责任公司 | Deformation control method and evaluation system for shield underpassing structure |
| CN111058855B (en) * | 2019-11-11 | 2021-03-16 | 北京住总集团有限责任公司 | Deformation control method and evaluation system for shield underpassing structure |
| CN111368016A (en) * | 2020-02-28 | 2020-07-03 | 重庆市勘测院 | Multi-threshold-constrained rail transit control protection area spatial information extraction and analysis method |
| CN111368016B (en) * | 2020-02-28 | 2023-04-11 | 重庆市勘测院 | Multi-threshold-value-constrained rail transit control protection area spatial information extraction and analysis method |
| CN111457889A (en) * | 2020-06-02 | 2020-07-28 | 中际物联科技（深圳）有限公司 | Method for monitoring subway tunnel settlement through optical fiber static level |
| CN111457889B (en) * | 2020-06-02 | 2022-07-12 | 中际物联科技（深圳）有限公司 | Method for monitoring subway tunnel settlement through optical fiber static level |
| CN112257154A (en) * | 2020-10-20 | 2021-01-22 | 北京交通大学 | Urban tunnel transparent construction monitoring method and system |
| CN112257154B (en) * | 2020-10-20 | 2023-12-01 | 北京交通大学 | Transparent construction monitoring method and system for urban tunnel |
| CN112983548A (en) * | 2021-03-05 | 2021-06-18 | 四川省建筑科学研究院有限公司 | Underground construction monitoring and early warning method, device, server and system |
| CN113886913A (en) * | 2021-09-18 | 2022-01-04 | 中铁十八局集团有限公司 | Method for reinforcing equivalent stiffness of underground engineering connection |
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