CN102277879B - Construction protection method for existing foundation with over crossing railway bridge - Google Patents
Construction protection method for existing foundation with over crossing railway bridge Download PDFInfo
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- CN102277879B CN102277879B CN 201110116699 CN201110116699A CN102277879B CN 102277879 B CN102277879 B CN 102277879B CN 201110116699 CN201110116699 CN 201110116699 CN 201110116699 A CN201110116699 A CN 201110116699A CN 102277879 B CN102277879 B CN 102277879B
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Abstract
The invention discloses a construction protection method for an existing foundation with an over crossing railway bridge. The method comprises the following steps of: 1, reinforcing an existing railway ballast bed, blocking ballast aggregate with a baffle plate, and punching a baffle plate side into a subgrade with a steel bar or a steel pipe so as to stabilize the baffle plate; 2, drilling a plurality of arranging holes on lava and boulder stones of a pier cushion cap and a gantry pier cushion cap foundation pit positioned on one side of a railway bed; 3, washing holes; 4, inserting a steel pipe protection pile into each hole to form a cement mortar steel pipe pile protection wall; 5, washing holes; 6, injecting cement mortar: injecting cement mortar into steel pipes and gaps between steel pipes and holes from the pipe bottom of each steel pipe protection pile; and 7, performing receiving inspection. Due to the adoption of the method, the construction technical problem of high protection construction difficulty of the existing railway subgrade under the geological conditions of lava and boulder stone is solved effectively, and the aims of realizing low construction protection cost on the existing railway bridge foundation, easiness for construction, high construction efficiency, short construction period and low safety risk are fulfilled.
Description
Technical field
The invention belongs to road and bridge construction method and technology field, what relate generally to is a kind of upper spanning existing railway Bridge Foundation construction protection method.
Background technology
Along with the development of high-speed railway, speedway, corresponding newly built railway, highway crossing existing railway are can hardly be avoided thereupon.Cross on a lot of the existing railway bridge pier from existing railway too close to, before excavation bridge pier base and cushion cap foundation, must carry out construction safety protection to the existing railway roadbed of corresponding site.Construction safety protection method commonly used is by the hand excavated pile protection and squeezes into rail pile or the steel pipe pile protection at present.The protection of employing hand excavated pile need to strengthen the button rail to existing railway, and button rail spended time is longer, and is very large to existing railway operation interference, can have a strong impact on the duration, and not only cost is high, and security risk is very large; Adopt the protection of rail pile or steel pipe pile, running into lava and boulder geological conditions, when pile driver is difficult to rail pile or steel pipe pile laid, still need to after manually excavating the hole, steel pipe pile be inserted in the hole, bring great inconvenience to construction, not only have a strong impact on construction speed, and cost is high, potential safety hazard is large.
Summary of the invention
The present invention is directed to above-mentioned deficiency of the prior art, a kind of upper spanning existing railway Bridge Foundation construction protection method is provided, effectively solved the large construction technology difficult problem of existing railway subgrade protection difficulty of construction under lava and boulder geological conditions, reach make spanning existing railway Bridge Foundation construction protection cost low, be easy to construct, efficiency of construction height, short construction period, purpose that security risk is low.
For achieving the above object, the present invention adopts following technical scheme: a kind of upper spanning existing railway Bridge Foundation construction protection method may further comprise the steps:
The first step: the existing railway railway roadbed is reinforced, with baffle plate ballast aggregate is blocked, the baffle plate side is squeezed into reinforcing bar or steel pipe and is stablized baffle plate in the roadbed;
Second step: boring is positioned at pier cushion cap and transom pier cushion cap foundation ditch that water bores a plurality of aligned apertures on the lava of railway bed one side and the boulder geology;
The 3rd step: hole flushing;
The 4th step: in each hole, insert a steel pipe fender pile, form cement mortar steel pipe pile protecting wall;
The 5th step: hole flushing;
The 6th step: injected water cement mortar, cementing mortar in steel pipe and the space in steel pipe and hole at the bottom of the pipe of each steel pipe fender pile;
The 7th step: check and accept.
The drilling technique that the present invention processes the karst of maturation is initiative for upper spanning existing railway Bridge Foundation construction protection, has effectively solved the large construction technology difficult problem of existing railway subgrade protection difficulty of construction under lava and boulder geological conditions.Make that spanning existing railway Bridge Foundation construction protection cost is low, to be easy to construction, efficiency of construction height, short construction period, security risk low, guarantee in upper spanning existing railway bridge pier base, bearing platform construction process, especially the safety of existing railway operation and engineering construction in the upper spanning existing railway bridge pier base under lava and boulder geological conditions, the bearing platform construction process.
Description of drawings
Fig. 1 is the schematic diagram of upper spanning existing railway Bridge Foundation construction protection method flow process;
Fig. 2 is spanning existing railway cushion cap fender pile general layout schematic diagram on the newly built railway Line for Passenger Transportation grand bridge;
Fig. 3 is pier cushion cap fender pile layout schematic diagram;
Fig. 4 is pier cushion cap elevational schematic view;
Fig. 5 is transom pier cushion cap fender pile layout schematic diagram;
Fig. 6 is the transom pier elevational schematic view.
Among the figure: 1, steel pipe fender pile; 2, pier cushion cap; 3, existing railway roadbed; 4, existing railway uplink and downlink center line; 5, pile foundation; 6, transom pier cushion cap; 7, special line for passenger trains grand bridge; 8, existing railway operation line.
The specific embodiment
Technical scheme of the present invention is described in further detail.
Shown in Fig. 2-6: a kind of upper spanning existing railway Bridge Foundation construction protection method, the special line for passenger trains grand bridge 7 of constructing comprises two transom pier cushion caps 6 crossing over existing railway operation line 8 and the bridge pier that lays respectively at existing railway uplink and downlink center line 4 one sides, pier cushion cap 2 and transom pier cushion cap 6 outsides are 2.94 meters from the beeline of existing railway uplink and downlink center line 4, and spanning existing railway Bridge Foundation construction protection method may further comprise the steps on this:
As shown in Figure 1:
The first step: the existing railway railway roadbed is reinforced, with baffle plate ballast aggregate is blocked, the baffle plate side is squeezed into reinforcing bar or steel pipe and is stablized baffle plate in the roadbed.
Second step: boring, be positioned on the lava of railway bed one side and the boulder geology water at the cushion cap foundation ditch and hole to projected depth, water bores when holing, in the railway outside, hold borer drill rod with two wire rope, the other end is fixed on the earth anchor, and angle is 45 between wire rope and ground
0, affect the existing railway operation to prevent that rig from tilting or collapsing.
For guaranteeing pier cushion cap 2 and transom pier cushion cap 6 excavation safety, pier cushion cap 2 design heights are three meters, adopt dark 6 meters Ф 10.8 ㎝ * 1 pair of existing railway roadbed 3 of 1 ㎝ steel pipe fender pile to protect; Transom pier cushion cap 6 design heights are 2.5 meters, adopt dark 5 meters Ф 10.8 ㎝ * 1 pair of existing railway roadbed 3 of 1 ㎝ steel pipe fender pile to protect.For forming cement mortar steel pipe pile protecting wall, need to arrange and bore a plurality of holes, the spacing between each hole is 25cm.Be to guarantee the stable of existing railway operation security and existing railway roadbed 3, steel pipe fender pile 1 routinely dig a drilling construction every three.
The 3rd step: hole flushing.At the bottom of the Grouting Pipe patchhole, at the bottom of the hole, up clean the duct with clear water, the water that emits in the hole becomes and stops to clean after clear.
The 4th step: the steel pipe fender pile is inserted in the hole, just form cement mortar steel pipe pile protecting wall behind steel pipe fender pile 1 of insertion in each hole, when fender pile was constructed, the existing railway main points were gone slowly, by train speed limit 45Km/h.Since from existing railway line too close to, during construction, personnel and machinery will be strictly on guard against especially and invade limit.
The 5th step: hole flushing.At the bottom of the Grouting Pipe patchhole, at the bottom of the hole, up clean the duct with clear water, emit in the hole
After becoming clearly, water stops to clean.
The 6th step: injected water cement mortar
With cement: sand is that the cement mortar of 1:1 match ratio is injected in Ф 10.8 ㎝ * 1 ㎝ steel pipe and the space in steel pipe and hole, the filling space, and 1 slip casting of steel pipe fender pile is notes upwards from the pipe end.
The 7th step: acceptance(check), carry out the front protection of construction for bridge pier base 5, bearing platform construction and prepare.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every any simple modification, change and equivalent structure of above embodiment being done according to the technology of the present invention essence changes, and all still belongs in the protection domain of technical solution of the present invention.
Claims (4)
1. go up spanning existing railway Bridge Foundation construction protection method for one kind, it is characterized in that: described upper spanning existing railway Bridge Foundation construction protection method may further comprise the steps:
The first step: the existing railway railway roadbed is reinforced, with baffle plate ballast aggregate is blocked, the baffle plate side is squeezed into reinforcing bar or steel pipe and is stablized baffle plate in the roadbed;
Second step: boring is positioned at pier cushion cap foundation ditch that water bores a plurality of aligned apertures on the lava of railway bed one side and the boulder geology;
The 3rd step: hole flushing;
The 4th step: in each hole, insert a steel pipe fender pile, form cement mortar steel pipe pile protecting wall;
The 5th step: hole flushing;
The 6th step: injected water cement mortar, cementing mortar in steel pipe and the space in steel pipe and hole at the bottom of the pipe of each steel pipe fender pile;
The 7th step: check and accept.
2. upper spanning existing railway Bridge Foundation construction protection method according to claim 1, it is characterized in that: the spacing between each hole of described a plurality of aligned apertures is 25cm.
3. upper spanning existing railway Bridge Foundation construction protection method according to claim 1 is characterized in that: described steel pipe fender pile is dark 6 meters Ф 10.8 ㎝ * 1 ㎝ steel pipe or dark 5 meters Ф 10.8 ㎝ * 1 ㎝ steel pipe.
4. upper spanning existing railway Bridge Foundation construction protection method according to claim 1, it is characterized in that: described steel pipe fender pile is by digging a drilling construction every three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110116699 CN102277879B (en) | 2011-05-06 | 2011-05-06 | Construction protection method for existing foundation with over crossing railway bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110116699 CN102277879B (en) | 2011-05-06 | 2011-05-06 | Construction protection method for existing foundation with over crossing railway bridge |
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| CN102277879A CN102277879A (en) | 2011-12-14 |
| CN102277879B true CN102277879B (en) | 2013-03-13 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888795A (en) * | 2012-10-25 | 2013-01-23 | 中铁十九局集团有限公司 | Karst roadbed grouting process |
| CN109629590A (en) * | 2017-10-09 | 2019-04-16 | 上海宝冶集团有限公司 | The construction method of Rock Region building pile foundation cushion cap |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050097478A (en) * | 2005-09-15 | 2005-10-07 | 김혜영 | Process for constructing underground structures |
| CN101838968A (en) * | 2010-05-19 | 2010-09-22 | 中铁二十局集团有限公司 | Double track bridge construction process crossing existing railway operational lines |
| CN101963061A (en) * | 2010-10-19 | 2011-02-02 | 浙江省建工集团有限责任公司 | Construction method for underground box culvert of existing railway line |
-
2011
- 2011-05-06 CN CN 201110116699 patent/CN102277879B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050097478A (en) * | 2005-09-15 | 2005-10-07 | 김혜영 | Process for constructing underground structures |
| CN101838968A (en) * | 2010-05-19 | 2010-09-22 | 中铁二十局集团有限公司 | Double track bridge construction process crossing existing railway operational lines |
| CN101963061A (en) * | 2010-10-19 | 2011-02-02 | 浙江省建工集团有限责任公司 | Construction method for underground box culvert of existing railway line |
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| CN102277879A (en) | 2011-12-14 |
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| CB03 | Change of inventor or designer information |
Inventor after: Lei Bing Inventor after: Jin Haizhong Inventor after: Zhou Wei Inventor after: Han Lifeng Inventor after: Li Changbai Inventor after: Gu Futang Inventor after: Zhang Bo Inventor after: Fei Caizhang Inventor after: Chen Linfeng Inventor after: Ma Xiaojun Inventor before: Lei Bing Inventor before: Zhou Wei Inventor before: Gu Futang Inventor before: Li Changbai Inventor before: Zhang Bo Inventor before: Fei Caizhang Inventor before: Chen Linfeng Inventor before: Ma Xiaojun Inventor before: Jin Haizhong |
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Free format text: CORRECT: INVENTOR; FROM: LEI BING ZHOU WEI GU FUTANG LI CHANGBAI ZHANG BO FEI CAIZHANG CHEN LINFENGMA XIAOJUN JIN HAIZHONG TO: LEI BING ZHOU WEI HAN LIFENG LI CHANGBAI GU FUTANG ZHANG BO FEI CAIZHANG CHEN LINFENG MA XIAOJUN JIN HAIZHONG |
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