CN109056738A - Excavation method below high-speed railway - Google Patents
Excavation method below high-speed railway Download PDFInfo
- Publication number
- CN109056738A CN109056738A CN201810947981.9A CN201810947981A CN109056738A CN 109056738 A CN109056738 A CN 109056738A CN 201810947981 A CN201810947981 A CN 201810947981A CN 109056738 A CN109056738 A CN 109056738A
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- speed railway
- excavation
- foundation
- construction
- Prior art date
- 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.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A kind of high-speed railway lower section excavation method.It includes constituting foundation pit support system；Foundation pit inside is segmented, is excavated paragraph by paragraph, every section uses from top to bottom, the stage excavation mode of two sides behind first middle part；The foundation soil heap excavated out is loaded on the ground between foundation pit and two high-speed railway bridge pier cushion caps adjacent with foundation pit；After required heap carrying capacity to be achieved, no longer preloading；Digging process monitors the deformation real-time perfoming of high-speed railway bridge pier and foundation pit；Main body construction is carried out rapidly, gradually decreases heap carrying capacity；After the completion of construction, the foundation soil of remaining preloading on the ground is all removed and etc..The invention has the advantages that the deflection that can be effectively controlled high-speed railway bridge pier in permissible range, ensure that the safety of high-speed railway.It ensure that the stability of foundation pit, it is ensured that construction safety.Important construction procedure has all carried out the calculating of science, and in conjunction with real-time monitoring, work progress substantially reduces risk factors, has very strong dissemination.
Description
Technical field
The invention belongs to rail facility construction method technical fields, more particularly to excavation of foundation pit below a kind of high-speed railway
Construction method.
Background technique
With the rapid development of China's Urbanization Construction and the complication of traffic route, base is excavated below high-speed railway
The case where hole, is more and more, and how to guarantee to be located at the stability of foundation pit and the safety of high-speed railway below high-speed railway becomes hardly possible
Point.When foundation pit is in below high-speed railway, foundation pit two sides are adjacent with high-speed railway bridge pier, after excavating foundation soil in foundation pit,
It is influenced by foundation pit distant place building and other loads, entire foundation pit position and surrounding soil will be emerged in large numbers in presentation as i.e. foundation pit
Surrounding soil floats.In addition, will drive pier footing when foundation pit surrounding soil is sprung up upwards and also move together, to make height
Floating trend is also presented in fast Railway Bridges And Piers, causes the bridge pier relative settlement of closing foundation ditch two sides is opposite to increase, causes high-speed railway
Roadbed deforms, once deflection exceeds warning value, will seriously affect traffic safety.Excavation of foundation pit is mainly pressed at this stage
It is carried out according to normal construction method and code requirement, but for sedimentation, the higher high-speed railway of deformation requirements, thereunder
Excavation pit, it is necessary to use scientific and rational construction method, construction safety be ensured in conjunction with Precision measurement, and then guarantee high speed
Railway security.But at present it is not yet found that the construction method of effect.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide excavation sides below a kind of high-speed railway
Method.
In order to achieve the above object, below high-speed railway provided by the invention excavation method include in order into
Capable the following steps:
1) foundation pit enclosure stake, anti-shifting stake are set in foundation pit surrounding position to be excavated by construction personnel first, and in base
It cheats in the ground in outside and sets subgrade protection stake；Then it is arranged more between the foundation pit enclosure stake top portion for being located at foundation pit two sides
Reinforced concrete support and bracing members, thus constitute foundation pit support system；
2) inside of entire foundation pit is divided at least two excavation sections along its length, then from close to high-speed railway bridge pier
One end carry out the excavation of foundation pit paragraph by paragraph to the other end, and every section using from top to bottom, first behind middle part two sides stage excavation
Mode；
3) when just being excavated, the foundation soil heap excavated out is loaded in foundation pit and two High-speed Railway Bridges adjacent with foundation pit
On ground between pier cushion cap, heap carrying capacity must first pass through calculating in advance and determine；
4) after required heap carrying capacity to be achieved, other foundation soils are transported to the designated place outside construction site by no longer preloading；
5) in digging process, the deformation real-time perfoming of high-speed railway bridge pier and foundation pit is monitored, once discovery high-speed iron
The deflection of road and bridge pier and/or foundation pit exceeds respective deflection early warning value, or encounters and be mutated larger situation, stops applying immediately
Work analyzes reason, and takes corresponding corrective action；
6) after the completion of the excavation of foundation pit, main body construction is carried out rapidly；With the progress of main body construction process, gradually decrease
Heap carrying capacity, while monitoring data are paid close attention to, forbid disposably all to remove the foundation soil of preloading on the ground, to prevent height
There is jumping phenomenon in fast Railway Bridges And Piers, to influence traffic safety；
7) after the completion of constructing, the foundation soil of remaining preloading on the ground is all removed.
In step 2), the length of the excavation section is 40 ± 10m；When stage excavation every layer with a thickness of 1m.
In step 5), the deflection early warning value of the high-speed railway bridge pier is 2.75mm；The deflection early warning of foundation pit 1
Value is 6.4mm.
Excavation method has the advantages that below high-speed railway provided by the invention
First, the deflection of high-speed railway bridge pier can be efficiently controlled in permissible range, ensure that the peace of high-speed railway
Entirely.
Second, it ensure that the stability of foundation pit, it is ensured that construction safety.
Third, important construction procedure have all carried out the calculating of science, and in conjunction with real-time monitoring, work progress substantially reduces wind
Dangerous factor has very strong dissemination.
Detailed description of the invention
Fig. 1 is to utilize base when excavation method makes foundation pit support system below high-speed railway provided by the invention
Cheat structural plan figure.
Fig. 2 is to utilize foundation pit structure plane when excavation method is excavated below high-speed railway provided by the invention
Figure.
Fig. 3 is to be shown using foundation pit longitudinal direction section when excavation method is excavated below high-speed railway provided by the invention
It is intended to.
Fig. 4 is to be shown using foundation pit transverse direction section when excavation method is excavated below high-speed railway provided by the invention
It is intended to.
Specific embodiment
In the following with reference to the drawings and specific embodiments to excavation method below high-speed railway provided by the invention into
Row is described in detail.
As shown in Fig. 1-Fig. 4, excavation method includes carrying out in order below high-speed railway provided by the invention
The following steps:
1) foundation pit enclosure stake 2, anti-shifting stake 3 are set in 1 surrounding position of foundation pit to be excavated by construction personnel first, and
Subgrade protection stake 4 is set in the ground in 1 outside of foundation pit；Then it is set between 2 top of foundation pit enclosure stake for being located at 1 two sides of foundation pit
More reinforced concrete supports 5 and bracing members 6 are set, foundation pit support system is thus constituted；
2) inside of entire foundation pit 1 is divided at least two excavation sections along its length, then from close to High-speed Railway Bridges
One end of pier carries out the excavation of foundation pit 1 to the other end paragraph by paragraph, and every section uses from top to bottom, and first the layering of two sides is opened behind middle part
Excavation formula, for example when excavation first segment first layer, first excavate the foundation soil at the intermediate position of this layer, then symmetrically excavate the layer two again
The foundation soil of side, excavates the second layer again later, and so on, the digging process until being fully completed this section；Then this is pressed
Method excavates next section；In the present embodiment, the length of the excavation section is 40 ± 10m；Every layer of thickness when stage excavation
For 1m；
3) when just being excavated, the foundation soil heap excavated out is loaded in foundation pit 1 and two high-speed railways adjacent with foundation pit 1
On ground between pier cap 7, as shown in Figure 2,3, heap carrying capacity must first pass through calculating in advance and determine in preloading region 8, calculate first
Preloading extent of injury caused by foundation pit supporting system, it is ensured that preloading does not influence foundation pit 1 or in foundation pit supporting system institute
In the coverage that can be born；Secondly the size of high-speed railway bridge pier Float upward function power can be offset by calculating preloading；
4) after required heap carrying capacity to be achieved, other foundation soils are transported to the designated place outside construction site by no longer preloading；
5) in digging process, the deformation real-time perfoming of high-speed railway bridge pier and foundation pit 1 is monitored, once discovery high-speed iron
The deflection of road and bridge pier and/or foundation pit 1 exceeds respective deflection early warning value, or encounters and be mutated larger situation, stops immediately
Construction analyzes reason, and takes corresponding corrective action；In the present embodiment, the deflection of the high-speed railway bridge pier is pre-
Alert value is 2.75mm；The deflection early warning value of foundation pit 1 is 6.4mm；
6) after the completion of the excavation of foundation pit 1, main body construction is carried out rapidly；With the progress of main body construction process, gradually subtract
Few heap carrying capacity, while monitoring data are paid close attention to, forbid disposably all to remove the foundation soil of preloading on the ground, to prevent
There is jumping phenomenon in high-speed railway bridge pier, to influence traffic safety；
7) after the completion of constructing, the foundation soil of remaining preloading on the ground is all removed.
Claims (3)
1. a kind of excavation method below high-speed railway, it is characterised in that: the construction method include in order into
Capable the following steps:
1) foundation pit enclosure stake (2), anti-shifting stake (3) are set in foundation pit (1) surrounding position to be excavated by construction personnel first, and
Subgrade protection stake (4) are set in the ground on the outside of foundation pit (1)；Then in the foundation pit enclosure stake (2) for being located at foundation pit (1) two sides
More reinforced concrete supports (5) and bracing members (6) are set between top, thus constitute foundation pit support system；
2) inside of entire foundation pit (1) is divided at least two excavation sections along its length, then from close to high-speed railway bridge pier
One end carry out the excavation of foundation pit (1) paragraph by paragraph to the other end, and every section using from top to bottom, and first the layering of two sides is opened behind middle part
Excavation formula；
3) when just being excavated, the foundation soil heap excavated out is loaded in foundation pit (1) and two high-speed railways adjacent with foundation pit (1)
On ground between pier cap (7), heap carrying capacity must first pass through calculating in advance and determine；
4) after required heap carrying capacity to be achieved, other foundation soils are transported to the designated place outside construction site by no longer preloading；
5) in digging process, the deformation real-time perfoming of high-speed railway bridge pier and foundation pit (1) is monitored, once discovery high-speed railway
The deflection of bridge pier and/or foundation pit (1) exceeds respective deflection early warning value, or encounters and be mutated larger situation, stops immediately
Construction analyzes reason, and takes corresponding corrective action；
6) after the completion of the excavation of foundation pit (1), main body construction is carried out rapidly；With the progress of main body construction process, gradually decrease
Heap carrying capacity, while monitoring data are paid close attention to, forbid disposably all to remove the foundation soil of preloading on the ground, to prevent height
There is jumping phenomenon in fast Railway Bridges And Piers, to influence traffic safety；
7) after the completion of constructing, the foundation soil of remaining preloading on the ground is all removed.
2. excavation method below high-speed railway according to claim 1, it is characterised in that: in step 2),
The length of the excavation section is 40 ± 10m；When stage excavation every layer with a thickness of 1m.
3. excavation method below high-speed railway according to claim 1, it is characterised in that: in step 5),
The deflection early warning value of the high-speed railway bridge pier is 2.75mm；The deflection early warning value of foundation pit (1) is 6.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810947981.9A CN109056738A (en) | 2018-08-20 | 2018-08-20 | Excavation method below high-speed railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810947981.9A CN109056738A (en) | 2018-08-20 | 2018-08-20 | Excavation method below high-speed railway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109056738A true CN109056738A (en) | 2018-12-21 |
Family
ID=64687494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810947981.9A Withdrawn CN109056738A (en) | 2018-08-20 | 2018-08-20 | Excavation method below high-speed railway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109056738A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778599A (en) * | 2019-01-29 | 2019-05-21 | 兰州交通大学 | Infiltration coefficient in-situ intelligent measuring method under a kind of high-speed rail ground mud stone overlying burden |
| CN110067216A (en) * | 2019-05-15 | 2019-07-30 | 中国电建集团中南勘测设计研究院有限公司 | A kind of construction method of weak soil section culvert |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761068A (en) * | 2009-11-10 | 2010-06-30 | 同济大学 | Box-raft pressure-bearing type foundation underpinning and construction reinforcing method for tunnel across pile foundation of bridge above river |
| CN102505697A (en) * | 2011-11-10 | 2012-06-20 | 中铁十七局集团有限公司 | Method for excavating deep foundation pits under temporary bridge of main line railway |
| CN107142948A (en) * | 2017-05-18 | 2017-09-08 | 河北省高速公路廊坊北三县管理处 | A kind of highway wears high ferro viaduct system and construction method without pre- leave |
-
2018
- 2018-08-20 CN CN201810947981.9A patent/CN109056738A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761068A (en) * | 2009-11-10 | 2010-06-30 | 同济大学 | Box-raft pressure-bearing type foundation underpinning and construction reinforcing method for tunnel across pile foundation of bridge above river |
| CN102505697A (en) * | 2011-11-10 | 2012-06-20 | 中铁十七局集团有限公司 | Method for excavating deep foundation pits under temporary bridge of main line railway |
| CN107142948A (en) * | 2017-05-18 | 2017-09-08 | 河北省高速公路廊坊北三县管理处 | A kind of highway wears high ferro viaduct system and construction method without pre- leave |
Non-Patent Citations (2)
| Title |
|---|
| 唐业清等: "《特种工程新技术2009》", 31 October 2009, 中国建材工业出版社 * |
| 郭全元: "基坑开挖对临近城际铁路高架桥墩的影响分析", 《铁道施工技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778599A (en) * | 2019-01-29 | 2019-05-21 | 兰州交通大学 | Infiltration coefficient in-situ intelligent measuring method under a kind of high-speed rail ground mud stone overlying burden |
| CN109778599B (en) * | 2019-01-29 | 2023-08-22 | 兰州交通大学 | In-situ intelligent determination method for permeability coefficient of high-speed railway foundation mudstone under overburden load |
| CN110067216A (en) * | 2019-05-15 | 2019-07-30 | 中国电建集团中南勘测设计研究院有限公司 | A kind of construction method of weak soil section culvert |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101831873B (en) | Temporary bridge covered excavation method for constructing box culvert below traffic ground line of operating track | |
| CN102352590B (en) | Method for splicing highfill roadbed by adopting pile-sheet retaining wall | |
| CN111396095B (en) | Tunnel simple arch open cut tunnel structure penetrating through huge karst cave and construction method thereof | |
| CN105804119A (en) | Underground corridor structure with dual-purpose pile foundations and construction method of underground corridor structure | |
| CN111139721A (en) | Frame bridge penetrating existing railway bridge downwards and construction method thereof | |
| CN111172833A (en) | Construction method of steep slope high embankment structure | |
| CN109056738A (en) | Excavation method below high-speed railway | |
| CN111411992A (en) | Integrated structure system penetrating through giant karst cave and construction method thereof | |
| CN108708290B (en) | Box bridge frame hollow structure of small-radius railway curve unit and cast-in-place construction method | |
| CN111501451B (en) | Construction method for jacking municipal frame bridge | |
| CN107152281A (en) | The construction method of fractured rock tunnel Xia Chuan abrupt slopes high pier | |
| CN209669718U (en) | A kind of existing hangar tunnel combination stone cut off wall structure of rockfall protection | |
| CN104652299B (en) | Construction method is shifted out in the whole hole of a kind of existing bridges and culverts of electric railway | |
| CN111041995B (en) | Construction method for U-shaped frame structure to penetrate high-speed rail bridge obliquely downwards | |
| CN212154795U (en) | Integral structure system for passing through giant karst cave | |
| CN105625184A (en) | Subway station building method using bridge and station combined building mode | |
| CN114790748A (en) | Construction method for deep foundation pit near existing line | |
| CN204151662U (en) | A kind of one across the temporary trestle bridge crossing over river valley | |
| CN109555173A (en) | A kind of separate type bridge integrally lifts stake reinforcement means | |
| CN113389218A (en) | Retaining wall structure for entrance and exit of road bridge and construction method thereof | |
| RU180833U1 (en) | DEVICE FOR PROTECTING THE RAILWAY | |
| CN106555379A (en) | Pass through both wired elevated formation level Combined temporary bridge construction methods | |
| CN220888347U (en) | Newly-built shield tunnel is worn existing river course railway bridge under and is reformed transform structure | |
| CN211872560U (en) | Frame bridge of existing railway bridge is worn down | |
| CN211898526U (en) | Pile foundation underpinning protection device based on limited space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Qi Pengyu Inventor after: Wang Jiawu Inventor after: Huang Jian Inventor after: Xian Binglin Inventor after: Zhang Jipei Inventor after: Zhou Zhiwei Inventor after: Xu Wenhao Inventor after: Zhang Xiaosheng Inventor before: Wang Jiawu Inventor before: Huang Jian Inventor before: Xian Binglin Inventor before: Zhang Jipei Inventor before: Zhou Zhiwei Inventor before: Xu Wenhao Inventor before: Zhang Xiaosheng |
|
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181221 |