CN201901875U - Excavation environment controlling and protecting monitoring unit for large-scale ultra-deep foundation pit - Google Patents
Excavation environment controlling and protecting monitoring unit for large-scale ultra-deep foundation pit Download PDFInfo
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- CN201901875U CN201901875U CN2010206645182U CN201020664518U CN201901875U CN 201901875 U CN201901875 U CN 201901875U CN 2010206645182 U CN2010206645182 U CN 2010206645182U CN 201020664518 U CN201020664518 U CN 201020664518U CN 201901875 U CN201901875 U CN 201901875U
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Abstract
The utility model relates to an excavation environment controlling and protecting monitoring unit for a large-scale ultra-deep foundation pit, which comprises a display, a data processor, a ground settlement detecting instrument, a pipeline damage detecting instrument, an overhead pile foundation displacement detecting instrument, a water pressure sensor and an earth pressure sensor, wherein, the data processor is connected with the display; and the ground settlement detecting instrument, the pipeline damage detecting instrument, the overhead pile foundation displacement detecting instrument, the water pressure sensor and the earth pressure sensor are respectively connected with the data processor. Compared with the prior art, the excavation environment controlling and protecting monitoring unit has the advantages as follows: the security for the peripheral environment is high, and the analysis on the large-scale ultra-deep foundation pit is effective and reasonable.
Description
Technical field
The utility model relates to a kind of supervising device, especially relates to control of a kind of extensive ultra-deep foundation pit excavation environment and protection monitoring device.
Background technology
Expo transformer station foundation ditch is located in soft clay area, and under so complicated surrounding enviroment the super large foundation ditch of more than 30 meter of excavation in Shanghai so that the whole nation all belong to the first.Therefore how predicting, control and protect building, the pipeline of next-door neighbour's foundation ditch to become one, to have difficulty big and press for a problem of solution.Be still to rely on the deformation pattern of experience (as the Peck method) prediction sheet pile or campshed supporting at present with the urgent corresponding of engineering demand.Domestic and international various analytical method does not still have the method that the extensive ultra-deep foundation pit excavation of soft clay area ambient influnence calculates and assessment is controlled, therefore for the diaphragm wall space enclosing structure, and under the underground precipitation condition that is coupled, the how definitely size of facial disfigurement and distribution pattern, and guarantee the safety of surrounding enviroment, thereby instruct design and construction to have important direct application value.
The engineering demand:
(1) deformation analysis of foundation pit enclosure structure distortion and stable, peripheral pipeline, building and viaduct pile foundation is the prerequisite of carrying out environment control and protection under the comprehensive operating modes such as reasonable consideration artesian water, the construction of diving dewatering measure and space enclosing structure and excavation.
(2) contrast of foundation ditch measured result and analysis result is the basis of determining reasonable analysis model and computational methods, thereby provides foundation for one working procedure under the foundation ditch carries out rational environment control with protection.
The difficult point that problem is implemented:
(1), determines to be suitable for the analysis calculation method of the extensive ultra-deep foundation pit excavation of soft clay area comprehensively than selecting domestic and international various research method;
(2) adopt statistical theory and method, determine the deformation pattern and distortion size of foundation ditch under each influence factor based on variablees such as the excavation of foundation pit degree of depth, braced cuts structure, dewatering measures;
(3) calculating and the simulation of seepage field in precipitation such as artesian water and the diving process;
(4) soil body sedimentation and distortion are calculated in the solid coupling of the stress field simulation that causes of soil excavation and stream thereof;
(5) excavation and precipitation are to the impact analysis of the overhead pile foundation of periphery;
(6) excavation and precipitation comprise 3 D deformation, pipeline internal force and safety evaluation standard to the impact analysis of peripheral buried pipe.
There is following shortcoming in existing technology: the safety to surrounding enviroment is low, can not reach effective and reasonable to the analysis of extensive ultra-deep foundation pit.
Summary of the invention
The purpose of this utility model is exactly that a kind of safe to surrounding enviroment is provided in order to overcome the defective that above-mentioned prior art exists, to the analysis of extensive ultra-deep foundation pit effective and reasonable control of extensive ultra-deep foundation pit excavation environment and protection monitoring device.
The purpose of this utility model can be achieved through the following technical solutions: control of a kind of extensive ultra-deep foundation pit excavation environment and protection monitoring device; it is characterized in that; this device comprises display, data processor, surface settlement survey meter, the impaired survey meter of pipeline, overhead pile foundation displacement survey meter, water pressure sensor, soil pressure sensor; described data processor is connected with display, and described surface settlement survey meter, the impaired survey meter of pipeline, overhead pile foundation displacement survey meter, water pressure sensor, soil pressure sensor are connected with data processor respectively.
Described data processor comprises FLAC3D numerical analysis module, FRWS foundation ditch analysis module.
Compared with prior art, the utility model is not only verified the safety of foundation ditch self under precipitation excavation design and construction scheme, the more important thing is that expection passes judgment on influence degree such as the displacement of surrounding ground sedimentation in the excavation of foundation pit, peripheral pipeline and overhead pile foundation and sedimentation, for controlling in advance under each excavating condition, becoming the safety of base pit engineering and the controllability of surrounding enviroment safety provides direct foundation.Specifically comprise: the one, the safety of each design and construction scheme to surrounding enviroment estimated in expection; The 2nd, draw major influence factors to the surrounding enviroment influence, the item that notes in the design and construction is provided; The 3rd, according to monitoring materials contrast, draw effective analytical method of more rational extensive ultra-deep foundation pit, for extensive ultra-deep foundation pit from now on provides analysis foundation and experience.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
As shown in Figure 1; control of a kind of extensive ultra-deep foundation pit excavation environment and protection monitoring device; this device comprises display 1; data processor 2; surface settlement survey meter 3; the impaired survey meter 4 of pipeline; overhead pile foundation displacement survey meter 5; water pressure sensor 6; soil pressure sensor 7; data processor 2 is connected with display 1; surface settlement survey meter 3; the impaired survey meter 4 of pipeline; overhead pile foundation displacement survey meter 5; water pressure sensor 6; soil pressure sensor 7 is connected with data processor 2 respectively, and data processor 2 comprises FLAC3D numerical analysis module; FRWS foundation ditch analysis module.
Extensive ultra-deep foundation pit excavation environment control and guard method, the step of this method is as follows:
(1) each methods and results of space enclosing structure and measured value contrast, determine the reasonable analysis method that the super-large diameter ultra-deep foundation pit is out of shape:
By Clough method (1989), Venus retaining structure analysis software FRWS of Tongji University and FLAC3D numerical simulation space enclosing structure distortion is analyzed.The result shows and adopts suitable empirical method can estimate the space enclosing structure maximum distortion, estimates deformation values but may surpass.For the lateral deformation of deep foundation ditch, the enclosure wall lateral deformation regularity of distribution that the present analysis method provides is compared measured value and is had higher accuracy in computation with maximum magnitude.Go along with sb. to guard him the vertical displacement aspect of ground-connecting-wall, result of calculation shows that the upwards vertical displacement of the space enclosing structure that provides is with bigger than normal when selecting for use soil body modulus of compressibility to calculate in the deep pit digging analysis.
(2) influence factor of surface settlement assessment under each factor effect, surface settlement that each analytical method obtains and measured value comparative study:
Adopt various analysis that the foundation ditch surface settlement of Expo transformer station is analyzed, comprise 3 kinds of methods (Peck simplifies analytical method, Tongji University's triangle pattern and Tongji University's parabola pattern), Peck empirical method (1969), Clough ﹠amp that Venus retaining structure analysis software FRWS of Tongji University provides; Rourke method (1990), Hsieh ﹠amp; Ou method (1998) and FLAC3D Three-Dimensional Numerical Analysis method.The result shows Tongji University's parabola pattern and the Hsieh ﹠amp that Venus software FRWS of Tongji University provides; Result that the Ou method provides and measured value are the most approaching, and the result of calculation of FLAC3D is less than normal, and this is will not make the surface settlement value want less than normal owing to consider the modulus of resilience and floor weight factor.
Cheat outer ground sedimentation pattern aspect, Tongji University's parabola pattern, Hsieh; Ou method and FLAC3D and reality are comparatively identical, and the distance that maximum settlement is positioned at the foundation ditch limit is respectively 18m, 17m and 17m, and the actual measurement maximum value appears in the 15～20m scope of limit, hole.Excavate the influence basin that causes surface settlement from foundation pit dewatering, three dimensional analysis result and measured value are more identical.
Shanghai area excavation of foundation pit and precipitation have stronger practicality to the statistic analysis result of space enclosing structure and surface settlement influence, no matter be space enclosing structure lateral deformation or hole outer ground sedimentation, this engineering measurement value all is within the scope of Shanghai City deep foundation ditch statistics.
(3) under foundation pit dewatering and each operating mode of excavation, the safety analysis of elevated bridge pile foundation:
The side viaduct pile foundation distortion of North Road, Chengdu comprises horizontal movement and the vertical displacement two parts towards the foundation ditch side, and level to displacement greater than vertical sedimentation, pile foundation level displacement distribution aspect, the pile end displacement maximum, take second place in the stake top, the middle part minimum, but overall displacements difference is in 3mm, and stake is long to be 30m, so the flexural deformation rate is very little.Each pile foundation in the same cushion cap, along with the increase of foundation ditch distance, distortion progressively reduces.The stressed aspect of pile foundation of bearing platform has produced maximum hogging moment at pile crown, be excavated to the hole during end the maximum positive bending moment of pile foundation be 110kNm, maximum hogging moment is 28kNm.The viaduct pile foundation settlement of actual measurement is subjected to some other factor affecting makes that its regularity of distribution is not obvious, but overall value is very little, and amplitude shows that excavation of foundation pit is very little to the influence of viaduct pile foundation in 5mm.
(4) determining of pipe safety evaluation index and standard, pipeline internal force analysis under the different distortion distribution pattern, the safety evaluatio of pipeline under each excavating condition:
The safety of pipeline and tubing and joint are closely related.Can be by to pipeline configuration corner, displacement structure with allow corner and displacement, pipe stress (by the pipeline strain indirect calculation) and permissible stress are passed judgment on the safety of pipeline.
The different sedimentation deformation pattern of pipeline will produce different pipeline distribution of internal force, adopted two kinds of deformation patterns of normal distribution pattern and error compensation function to compare, find pipeline vertical deformation many followed normal distribution distribution pattern and level is similar to distortion and error compensation functional form, comparative analysis shows the level of comparing to distortion, and the vertical deformation of pipeline is more obvious to the mechanics of piping affect trait.
The pipeline sedimentation of actual measurement is subjected to influences such as union and the interior conveying objects weight of pipe, not strict following apart from the more little rule of foundation ditch sedimentation far away more, this shows the influence that not only needs to consider pipeline self material proterties in the numerical analysis process, the influence of transport materials in must considering to manage (as gain in weight etc.).The analysis showed that: for relative flexibility tubing, its maximum settlement occurs near the foundation ditch axis, and distributional pattern and calculated value are more approaching; And for rigid pipe, maximum settlement does not appear on the foundation ditch central axis, but apart from the about 20～30m scope in axis, presents bimodal or the Unimodal Distribution phenomenon more.
The present invention has systematically studied for the first time the analysis of ambient influnences such as foundation ditch surrounding ground sedimentation under soft clay area super-large diameter, ultra-deep foundation pit excavation and the dewatering construction operating mode, building, pipeline and viaduct pile foundation and control at home, a series of achievements that have novelty in technical field below having obtained:
Systematically analyze external representational space enclosing structure, surface settlement deformation analysis method, and by three-dimensional flow solid coupling analysis construction simulation digging process, by with the comparative analysis of measured result, drawn the rational analytical method of soft clay area ultra-deep foundation pit space enclosing structure and surface settlement.
Systematically analyze under the multifactor effects such as space enclosing structure form, artesian water and diving dewatering construction, hole limit overload, bottom heave the quantitative analysis and the influence degree of the influence of foundation ditch surrounding enviroment are assessed.
Adopt statistical method, draw Shanghai area excavation of foundation pit and precipitation statistic analysis result, have stronger practicality space enclosing structure and surface settlement influence.
By passive pile theory and three-dimensional artificial analysis, carried out the safety evaluation of deep foundation ditch periphery elevated bridge pile foundation.
The standard and the evaluation index of hole limit pipeline safety evaluation have been determined, adopt 2 kinds of different line distribution patterns to determine the size of pipeline internal force and with the change procedure of excavation of foundation pit, draw under the pipeline different distortion situation influence degree, and carried out three-dimensional construction simulation analysis internal force.
Each analysis result that provides in advance and the contrast of follow-up measured result show, the calculated value and the measured value of space enclosing structure distortion, hole border district face sedimentation, surrounding building, pipeline and viaduct match, for a rational analysis approach and method have been explored in the environmental assessment of soft clay area super-large diameter ultra-deep foundation pit, can use for reference for the extensive ultra-deep foundation pit environment control of follow-up soft clay area and use, fill up the blank of China in this field.
The present invention not only verifies the safety of foundation ditch self under precipitation excavation design and construction scheme, the more important thing is that expection passes judgment on influence degree such as the displacement of surrounding ground sedimentation in the excavation of foundation pit, peripheral pipeline and overhead pile foundation and sedimentation, Expo becomes the safety of base pit engineering and the controllability of surrounding enviroment safety provides direct foundation for the Party A controls under each excavating condition in advance.Specifically act as: the one, the safety of each design and construction scheme to surrounding enviroment estimated in expection; The 2nd, draw major influence factors to the surrounding enviroment influence, the item that notes in the design and construction is provided; The 3rd, according to monitoring materials contrast, draw effective analytical method of more rational extensive ultra-deep foundation pit, for extensive ultra-deep foundation pit from now on provides analysis foundation and experience.By this project implementation, Expo transformer station foundation ditch safe excavation to cheating the end, and surrounding ground sedimentation, pipeline and overhead pile foundation etc. all are in the controlled safe range of expection, have guaranteed the safety of surrounding enviroment, have reached the intended purposes of the project implementation.
Claims (2)
1. extensive ultra-deep foundation pit excavation environment control and protection monitoring device; it is characterized in that; this device comprises display, data processor, surface settlement survey meter, the impaired survey meter of pipeline, overhead pile foundation displacement survey meter, water pressure sensor, soil pressure sensor; described data processor is connected with display, and described surface settlement survey meter, the impaired survey meter of pipeline, overhead pile foundation displacement survey meter, water pressure sensor, soil pressure sensor are connected with data processor respectively.
2. a kind of extensive ultra-deep foundation pit excavation environment according to claim 1 control and protection monitoring device is characterized in that described data processor comprises FLAC3D numerical analysis module, FRWS foundation ditch analysis module.
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| CN2010206645182U CN201901875U (en) | 2010-12-17 | 2010-12-17 | Excavation environment controlling and protecting monitoring unit for large-scale ultra-deep foundation pit |
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| CN2010206645182U CN201901875U (en) | 2010-12-17 | 2010-12-17 | Excavation environment controlling and protecting monitoring unit for large-scale ultra-deep foundation pit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499339A (en) * | 2013-09-29 | 2014-01-08 | 中国水电顾问集团昆明勘测设计研究院有限公司 | Settlement monitoring method for submerged structure |
| CN103669366A (en) * | 2013-01-24 | 2014-03-26 | 辽宁工程技术大学 | Remote monitoring early warning system for deep foundation pit support structure deformation |
| CN103953080A (en) * | 2014-05-20 | 2014-07-30 | 天津水运工程勘察设计院 | Monitoring method of breakwater foundation settlement |
| CN105133669A (en) * | 2015-07-01 | 2015-12-09 | 上海港湾工程质量检测有限公司 | Integrated installation device and method for soil pressure meter and osmometer on barrel-type foundation structure |
| CN106049558A (en) * | 2016-05-26 | 2016-10-26 | 东北大学 | Comprehensive pipe gallery information pre-warning system and method |
-
2010
- 2010-12-17 CN CN2010206645182U patent/CN201901875U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103669366A (en) * | 2013-01-24 | 2014-03-26 | 辽宁工程技术大学 | Remote monitoring early warning system for deep foundation pit support structure deformation |
| CN103499339A (en) * | 2013-09-29 | 2014-01-08 | 中国水电顾问集团昆明勘测设计研究院有限公司 | Settlement monitoring method for submerged structure |
| CN103953080A (en) * | 2014-05-20 | 2014-07-30 | 天津水运工程勘察设计院 | Monitoring method of breakwater foundation settlement |
| CN103953080B (en) * | 2014-05-20 | 2015-11-18 | 天津水运工程勘察设计院 | A kind of monitoring method of mole foundation settlement |
| CN105133669A (en) * | 2015-07-01 | 2015-12-09 | 上海港湾工程质量检测有限公司 | Integrated installation device and method for soil pressure meter and osmometer on barrel-type foundation structure |
| CN105133669B (en) * | 2015-07-01 | 2017-01-18 | 上海港湾工程质量检测有限公司 | Integrated installation device and method for soil pressure meter and osmometer on barrel-type foundation structure |
| CN106049558A (en) * | 2016-05-26 | 2016-10-26 | 东北大学 | Comprehensive pipe gallery information pre-warning system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI JIULONG ELECTRIC SCIENCE + TECHNOLOGY CO. Free format text: FORMER OWNER: SHANGHAI JIULONG ELECTRIC SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20140708 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: STATE GRID SHANGHAI ELECTRIC POWER COMPANY Free format text: FORMER NAME: SHANGHAI ELECTRIC POWER CORP. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Patentee after: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee after: Shanghai Jiulong Electric Power Science & Technology Co.,Ltd. Address before: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Patentee before: SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee before: Shanghai Jiulong Electric Power Science & Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140708 Address after: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Patentee after: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee after: Shanghai Jiulong Electric Power Science & Technology Co.,Ltd. Patentee after: STATE GRID SHANGHAI ELECTRIC POWER DESIGN Co.,Ltd. Address before: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Patentee before: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee before: Shanghai Jiulong Electric Power Science & Technology Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20191217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |