CN208517810U - A kind of temporary trestle bridge for deep big foundation pit excavation construction - Google Patents

A kind of temporary trestle bridge for deep big foundation pit excavation construction Download PDF

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Publication number
CN208517810U
CN208517810U CN201821044043.XU CN201821044043U CN208517810U CN 208517810 U CN208517810 U CN 208517810U CN 201821044043 U CN201821044043 U CN 201821044043U CN 208517810 U CN208517810 U CN 208517810U
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CN
China
Prior art keywords
bridge
lattice column
foundation pit
bridge floor
trestle
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201821044043.XU
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Chinese (zh)
Inventor
马国强
董敏忠
李庆斌
李为为
刘世玉
魏娜
何亚梦
王海航
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shijiazhuang Tiedao University
China Railway 18th Bureau Group Co Ltd
Fourth Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Original Assignee
Shijiazhuang Tiedao University
China Railway 18th Bureau Group Co Ltd
Fourth Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Shijiazhuang Tiedao University, China Railway 18th Bureau Group Co Ltd, Fourth Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd filed Critical Shijiazhuang Tiedao University
Priority to CN201821044043.XU priority Critical patent/CN208517810U/en
Application granted granted Critical
Publication of CN208517810U publication Critical patent/CN208517810U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of temporary trestle bridges for deep big foundation pit excavation construction comprising is set to the bridge floor of top surface, the ground-connecting-wall for being set to bridge floor left end lower part, the body of a bridge for being set to bridge floor right end lower part, the bridge pier being set to below the body of a bridge.The utility model structural stability with higher can reduce foundation pit and surrounding enviroment deformation, improve excavation of foundation pit efficiency, guarantee the safety of work progress.The erection of the utility model pattern foundation pit supporting structure and temporary road suitable for deep big foundation pit digging process.

Description

A kind of temporary trestle bridge for deep big foundation pit excavation construction
Technical field
The utility model relates to deep excavation project technical fields, and in particular to a kind of for deep big foundation pit excavation construction Temporary trestle bridge.
Background technique
In recent years, as base pit engineering constantly develops to depth, general orientation, the environmental condition on periphery also becomes increasingly complex, such as Where retaining structure in deep foundation pit, in work progress, under the requirement for sufficiently meeting supporting construction and outside environment safety, guarantee It also ensures that the balanced of the soil body excavates while earthwork outward transport in time, reaches the excavation for not only improving the earthwork and transport, and increase branch The rigidity of protection structure and support system reduces the deformation of foundation pit, is the main problem that deep foundation pit construction faces.Deep big foundation pit is being opened When digging, cutting depth is big, and area is wide, and earthwork transportation amount is big, and construction stage time span is big, and exposure is also easy to produce deformation to foundation pit for a long time Etc. factors bring many security risks to the earth excavation of deep big foundation pit, supporting and later period engineering construction, therefore there is an urgent need to A kind of continuous earthwork of energy, and support system is formed within the shortest time after soil body exposure, reduce foundation pit and surrounding enviroment The gib protective device for deep big foundation pit construction of deformation.
Utility model content
Since construction time span is big when the utility model provides a kind of construction of solution deep big foundation pit, foundation pit for a long time hold by exposure Easily there is the gib protective device of security risk.
To achieve the above object, technical solution used by the utility model is as follows:
A kind of temporary trestle bridge for deep big foundation pit excavation construction, key technology are: it includes being set to top surface The bridge floor concordant with ground, the body of a bridge for being set to bridge floor right end lower part, is set to bridge at the ground-connecting-wall for being set to bridge floor left end lower part Bridge pier below body.
The bridge floor is trestle top structure, including being set to the bridge floor backing plate of top surface, being set to below bridge floor backing plate Bridge floor main body, the left crossbeam to play a supportive role and the right crossbeam being set to below bridge floor main body.
The body of a bridge be trestle supporting construction, including as vertical supporting column left lattice column, right lattice column, be set to The supporting beam for the horizontal support effect that layering is arranged between left lattice column and ground-connecting-wall is set to left lattice column and right lattice column Between layering setting rise horizontal support effect connection beam.
The bridge pier is trestle bottom structure, including being set to the left bored concrete pile of left lattice column lower part and being set to right lattice The right bored concrete pile of column lower part.
As restriction, the bridge floor backing plate is 20 millimeters~25 millimeters thick steel plates, and the bridge floor main body is by ェ 20B I-steel Full paving composition, the left crossbeam and right crossbeam are respectively two ェ 45B steel purlin crossbeams.
It is limited as another kind, the left lattice column and right lattice column are steel lattice column, and sectional dimension is 450 millimeters X450 millimeters~500 millimeters x500 millimeters.
It is limited as another kind, embedded bar is in ground-connecting-wall on the left of the supporting beam, and reinforcing bar is taken on the right side of the supporting beam It is connected on left lattice column;The connection beam steel is erected between left lattice column and right lattice column and with supporting beam in same level Position, the supporting beam and connection beam pour simultaneously.
It is limited as another kind, the left bored concrete pile and right bored concrete pile are all made of the concrete drill hole perfusion of technical maturity Stake, stake diameter is having a size of 900 millimeters of 800 millimeters~φ of φ.
As further limiting, trestle Each part component can require to be adjusted according to actual engineering design, trestle Each section construction should follow every corresponding demand of technical standard including welding engineering, reinforced bar engineering, concreting engineering.
The utility model is due to using above-mentioned structure, and compared with prior art, acquired technological progress is:
(1) the utility model body of a bridge column is made of steel construction with bridge floor and is connected with welding manner and both met rigidity and want It asks, opposite casting concrete can save the duration again;
(2) body of a bridge of the steel lattice column composition of the utility model and beams of concrete form overlap joint system, can bear to erect simultaneously To load and lateral foundation pit soil pressure, engineering use and safe design requirement ensure that the greatest extent.
(3) the continual continuous earthwork of supporting trestle energy described in the utility model, and it is most short after soil body exposure Support system is formed in time, reduces foundation pit and surrounding enviroment deformation, it can Optimizing construction sequence, time with higher and economy Benefit.
To sum up, the utility model structural stability with higher can reduce foundation pit and surrounding enviroment deformation, improve foundation pit Efficiency is excavated, guarantees the safety of work progress, the erection of pattern foundation pit supporting structure and temporary road suitable for deep big foundation pit digging process.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.
In the accompanying drawings:
Fig. 1 is the overall structure diagram of the trestle of the utility model embodiment;
Fig. 2 is the bridge deck structure schematic diagram of the trestle of the utility model embodiment;
Fig. 3 is the body of a bridge structural schematic diagram of the trestle of the utility model embodiment;
Fig. 4 is the earthwork stage excavation schematic diagram (for four layers) of the utility model embodiment.
Mark component: 1- bridge floor, the 2- body of a bridge, 3- bridge pier, 4- ground-connecting-wall, 5- lead wall, 6- ground level;
101- bridge floor backing plate, 102- bridge floor main body, the left crossbeam of 103-, the right crossbeam of 104-;
The left lattice column of 201-, the right lattice column of 202-, 203- supporting beam, 204- connection beam;
The left bored concrete pile of 301-, the right bored concrete pile of 302-;
I indicates to excavate the first step, and II indicates to excavate second step, and III indicates to excavate third step, and IV indicates to excavate the 4th step;
1. being first of support bottom, bottom 2. is supported for second, 3. bottom is supported for third road, is 4. foundation pit bottom.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model.It should be appreciated that described herein excellent It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
A kind of temporary trestle bridge for deep big foundation pit excavation construction of embodiment
Referring to Fig.1, the utility model is as follows for the manufacturing process of the structure of the temporary trestle bridge of deep big foundation pit excavation construction.
Bridge floor 1: bridge floor backing plate 101 and bridge floor main body 102 collectively form floorings, the floorings directly with left crossbeam 103 It is connected with right crossbeam 104, left crossbeam 103 is erected on foundation pit ground-connecting-wall 4, and right crossbeam 104 is set up in lower right lattice column 202 On, and reinforcement measure is taken according to site requirement in respective action position;
The body of a bridge 2: trestle vertical supporting is made of left lattice column 201, right lattice column 202 and foundation pit ground-connecting-wall 4, is connected to foundation pit Layering level sets up lower support beam 203 as pattern foundation pit supporting structure, supporting beam 203 and left lattice column between wall 4 and left lattice column 201 201 are effectively overlapped, and same level lattice intercolumniation is with the connection of concrete connection beam 204, to solve to increase with cutting depth Bring trestle lateral bucking problem;
Bridge pier 3: the left bored concrete pile 301 of bottom of foundation ditch and right perfusion are inserted in left lattice column 201 and 202 bottom end of right lattice column respectively In the steel reinforcement cage of stake 302, concreting is then carried out.
Illustrate manufacturing process and use process of the invention below by specific embodiment.
Referring to Fig. 2,1 part of bridge floor is steelwork component, is connected using welding form, bridge floor backing plate in the present embodiment 101 are completely spread by ェ 20B I-steel and are formed using 20 millimeters of thick steel plate production, bridge floor main body 102, left crossbeam 103 and right crossbeam 104 Respectively two ェ 45B I-steel purlin crossbeams, construction site guarantee entire according to field engineering condition adjustment welding manner The stability of trestle support system.
Referring to Fig. 3, the body of a bridge 2 is the main supporting construction of trestle comprising the left lattice as vertical supporting column Column 201, right lattice column 202, the branch for playing horizontal support effect for being set to layering setting between left lattice column 201 and ground-connecting-wall 4 Support beam 203, the connection beam for playing horizontal support effect for being set to layering setting between left lattice column 201 and right lattice column 202 204, the left lattice column 201 and right lattice column 202 are steel lattice column, left lattice column 201 and right lattice column in the present embodiment 202 sectional dimension is 450 millimeters x450 millimeters, the 203 left side embedded bar of supporting beam of described horizontal support effect in In ground-connecting-wall 4, with bar splicing on left lattice column 201 on the right side of the supporting beam 203, supporting beam 203 and left lattice column 201 Position of action point level sets up the reinforcing bar of connection beam 204, and 204 reinforcing bar of linking beam and 203 reinforcing bar of supporting beam is made to be in same level Then position pours supporting beam 203 and connection beam 204 simultaneously, to reach good overall performance.
201 lower part of left lattice column is provided with left bored concrete pile 301, and right 202 lower part of lattice column is provided with right perfusion Stake 302, left bored concrete pile 301 and right bored concrete pile 302 described in the present embodiment are all made of the concrete drilling bored concrete pile of technical maturity, Stake diameter is having a size of 800 millimeters of φ, it is contemplated that the center point, verticality when cast-in-situ bored pile and the steel lattice column of interpolation are constructed are inclined The presence of difference, it is contemplated that steel column using the outer packet node way in part, using the external inclined steel lattice column node of " ︺ " shape reinforcing bar It is bound and is reinforced.
Referring to attached drawing 4, after deep basal pit temporary trestle bridge is set up, earth excavation mode are as follows: be first depending on foundation pit construction and want Ask and ambient environmental conditions formulate excavation of foundation pit layering, subregion and segmentation scheme, determine trestle position and excavation sequence, utilization Tau-effect sets up the form of construction work that digging is moved back with island in conjunction with trestle, uninterrupted continuous excavation operation, after soil body exposure most Support system is established in short time.Layer-by-layer process is specifically excavated after the completion of conceptual design, in every section can be expressed as (be with four layers Example): the topsoil of foundation pit is removed first, after applying crown beam and first of support, continues to apply after excavating to the second layer soil body downwards Add second to support, successively carries out three, four layer soil bodies later and excavate and its support to hole bottom, digging process is chosen according to situation to be grown Arm excavator cooperates step relay to cut the earth, and base pit dewatering and foundation pit data monitoring is carried out when digging, to adjust excavation in real time Scheme takes artificial clear slot after being excavated to away from substrate absolute altitude 30cm, carries out foundation pit back cover after the completion of excavating.It is excavated in every area Periphery is first dug, then digs centre, is fulcrum frame using central island using center as fulcrum earth excavation around to form central island If supporting construction, central island is excavated using platform is moved back.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, It should be included within the scope of the utility model claims protection.

Claims (5)

1. a kind of temporary trestle bridge for deep big foundation pit excavation construction, it is characterised in that: it include be set to top surface and ground Concordant bridge floor (1), the ground-connecting-wall (4) for being set to bridge floor (1) left end lower part, the body of a bridge for being set to bridge floor (1) right end lower part (2), it is set to the bridge pier (3) of the body of a bridge (2) below;
The bridge floor (1) is trestle top structure, including being set to the bridge floor backing plate (101) of top surface, being set to bridge floor backing plate (101) below bridge floor main body (102) is set to the following left crossbeam (103) to play a supportive role of bridge floor main body (102) and the right side Crossbeam (104),
The body of a bridge (2) is trestle supporting construction, including left lattice column (201), the right lattice column as vertical supporting column (202), it is set to the supporting beam for playing horizontal support effect of layering setting between left lattice column (201) and ground-connecting-wall (4) (203), it is set to the connection beam for playing horizontal support effect of layering setting between left lattice column (201) and right lattice column (202) (204);
The bridge pier (3) is trestle bottom structure, including being set to the left bored concrete pile (301) of left lattice column (201) lower part and setting It is placed in the right bored concrete pile (302) of right lattice column (202) lower part.
2. a kind of temporary trestle bridge for deep big foundation pit excavation construction according to claim 1, it is characterised in that: the bridge Face backing plate (101) is 20 millimeters~25 millimeters thick steel plates, and the bridge floor main body (102) is completely spread by ェ 20B I-steel to be formed, described Left crossbeam (103) and right crossbeam (104) are respectively two ェ 45B steel purlin crossbeams.
3. a kind of temporary trestle bridge for deep big foundation pit excavation construction according to claim 1, it is characterised in that: the left side Lattice column (201) and right lattice column (202) are steel lattice column, and sectional dimension is 450 millimeters x450 millimeters~500 millimeters X500 millimeters.
4. a kind of temporary trestle bridge for deep big foundation pit excavation construction according to claim 1, it is characterised in that: the branch It is interior in ground-connecting-wall (4) to support embedded bar on the left of beam (203), supporting beam (203) the right side bar splicing is in left lattice column (201) On;Connection beam (204) reinforcing bar is erected between left lattice column (201) and right lattice column (202) and exists with supporting beam (203) The same horizontal position, the supporting beam (203) and connection beam (204) pour simultaneously.
5. a kind of temporary trestle bridge for deep big foundation pit excavation construction according to claim 1, it is characterised in that: the left side Bored concrete pile (301) and right bored concrete pile (302) are all made of the concrete drilling bored concrete pile of technical maturity, and stake diameter is having a size of 800 milli of φ 900 millimeters of rice~φ.
CN201821044043.XU 2018-07-03 2018-07-03 A kind of temporary trestle bridge for deep big foundation pit excavation construction Expired - Fee Related CN208517810U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821044043.XU CN208517810U (en) 2018-07-03 2018-07-03 A kind of temporary trestle bridge for deep big foundation pit excavation construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821044043.XU CN208517810U (en) 2018-07-03 2018-07-03 A kind of temporary trestle bridge for deep big foundation pit excavation construction

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110820530A (en) * 2019-10-18 2020-02-21 北京市第三建筑工程有限公司 Concrete trestle and foundation pit connecting node structure and construction method thereof
CN110847188A (en) * 2019-12-20 2020-02-28 中建一局集团建设发展有限公司 Ultra-deep foundation pit earth excavation platform structure and construction method thereof
CN111062108A (en) * 2019-06-28 2020-04-24 中国水电顾问集团贵阳勘测设计研究院岩土工程有限公司 Method for correcting and adding suggested substrate elevation in batches by using excel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111062108A (en) * 2019-06-28 2020-04-24 中国水电顾问集团贵阳勘测设计研究院岩土工程有限公司 Method for correcting and adding suggested substrate elevation in batches by using excel
CN110820530A (en) * 2019-10-18 2020-02-21 北京市第三建筑工程有限公司 Concrete trestle and foundation pit connecting node structure and construction method thereof
CN110847188A (en) * 2019-12-20 2020-02-28 中建一局集团建设发展有限公司 Ultra-deep foundation pit earth excavation platform structure and construction method thereof

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Granted publication date: 20190219