CN105064373B - Foundation pit supporting structure of bridge main pier bearing platform on river channel steep slope bedrock and construction method thereof - Google Patents
Foundation pit supporting structure of bridge main pier bearing platform on river channel steep slope bedrock and construction method thereof Download PDFInfo
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- CN105064373B CN105064373B CN201510447090.3A CN201510447090A CN105064373B CN 105064373 B CN105064373 B CN 105064373B CN 201510447090 A CN201510447090 A CN 201510447090A CN 105064373 B CN105064373 B CN 105064373B
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- 238000010276 construction Methods 0.000 title claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000004567 concrete Substances 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000008595 infiltration Effects 0.000 claims description 5
- 238000001764 infiltration Methods 0.000 claims description 5
- 239000004927 clay Substances 0.000 abstract 1
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Bridges Or Land Bridges (AREA)
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Abstract
The invention discloses a foundation pit supporting structure of a bridge main pier bearing platform on riverway steep slope bedrock and a construction method thereof, and the foundation pit supporting structure comprises a cofferdam island and is characterized in that a steel sheet pile waterproof curtain is arranged on one side of the cofferdam island close to a riverway waterway, the steel sheet pile waterproof curtain is composed of a plurality of steel sheet piles which are vertically arranged side by side, the side edges of the adjacent steel sheet piles are mutually occluded to form the waterproof curtain, a construction access way which is composed of annular sandstone-clay layers is arranged on one side of the steel sheet pile waterproof curtain back to the waterway, the plane of the construction access way is lower than the top surface of the steel sheet pile waterproof curtain, and an annular reinforced concrete arch ring is arranged on one side of the construction access way back to the waterway, the construction progress and quality are improved, and the construction cost is reduced.
Description
Technical field
The present invention relates to a kind of foundation pit supporting construction building Main Pier of Bridges cushion cap on the basement rock of abrupt slope, river course, tool
The saying of body relates to foundation pit supporting construction and the construction method thereof building Main Pier of Bridges cushion cap on the basement rock of abrupt slope, river course.
Background technology
In the wild in large bridge construction, it is frequently encountered by the large bridges construction of crossing river channel, Jiang Dao
Building, the main pier of described large bridge is a lot, and different main pier bearing platforms can be built in different positions, in the face of different
Geographical position, lineament and geological structure.The such as Main Pier of Bridges cushion cap at crossing river channel, Jiang Dao is built
Time, part main pier bearing platform can be built in crossing river channel, the littoral position of Jiang Dao, and described littoral position is ground sometimes
The basement rock that gesture is steeper, earth and lithosphere are in relatively steep to downslope trend and the gradient, and about 30 to 50 spend scopes,
Owing to Main Pier of Bridges cushion cap is reinforced concrete construction, its size is relatively big, and the main pier bearing platform described in one side needs
Carrying bridge weight, higher to its construction quality and security requirement, on the other hand, described main pier bearing platform needs
Will be in the face of complicated lineament and geological structure, sandstone dirt bed riverbank as steeper in the gradient constructs holds to main pier
Platform construction brings difficulty, and a cushion cap part is positioned on the abrupt slope basement rock on riverbank, another part go deep into river or
River, Ji Shi navigation channel, side, the inevitable SEA LEVEL VARIATION in the face of the water surface of its bearing platform construction and river immersion pressure,
Side slope construction by navigation channel is unstable, faced by hydraulic pressure relatively big and pressure change exists uncertainty, bridge
A couple of days at least main pier bearing platform engineering time, the several months at most, such as the boundary time of flood season and non-flood period, more should
Pay attention to its working security and quality, so the construction of described Main Pier of Bridges cushion cap foundation ditch needs in the face of complicated ground
Matter, the hydrology construct, and difficulty of construction and requirement are higher.
The construction of prior art, constructs in particular for the Main Pier of Bridges foundation pit supporting construction on the basement rock of abrupt slope, river course
General employing can overcome hard architectonic static-pressure pile planting machine to construct, and builds in cofferdam and carries out cushion cap foundation ditch on island
Build and on foundation ditch, build main pier bearing platform.But prior art cost is the highest, it addition, in foundation ditch
Effect waterproof, sealing is the most undesirable, so needing a kind of more preferably construction on the basement rock of abrupt slope, river course
The foundation pit supporting construction of Main Pier of Bridges cushion cap.
Summary of the invention
Present invention aims to prior art defect, it is provided that a kind of construction bridge on the basement rock of abrupt slope, river course
The foundation pit supporting construction of beam main pier bearing platform, provides a kind of specifically and builds bridge main on the basement rock of abrupt slope, river course
The foundation pit supporting construction of pier cushion cap and construction method thereof, present invention solves the technical problem that be lineament with
And geology, the hydrology construct the cushion cap foundation pit supporting construction building Main Pier of Bridges on complicated abrupt slope, river course basement rock, have
Effect realizes the sealing of foundation ditch, waterproof, ensures underwater support table deep pit construction and the smooth construction of cushion cap part,
While guaranteeing deep pit monitor, improve construction speed and quality, reduce construction cost.
Technical scheme is as described below:
Main Pier of Bridges cushion cap foundation pit supporting construction on the basement rock of abrupt slope, a kind of river course, builds island including a cofferdam,
It is characterized in that, described cofferdam is built island and the side near navigation channel, river course is provided with steel sheet pile water-stop curtain, institute
The steel sheet pile that the steel sheet pile water-stop curtain stated vertically is arranged side by side by several is constituted, described adjacent steel sheet pile
Side is engaged formation water-stop curtain each other, and described steel sheet pile water-stop curtain is arranged in the side in navigation channel dorsad
Having the builder's road that the sandstone dirt bed of annular is constituted, described builder's road plane is less than described steel sheet pile
The end face of water-stop curtain, described builder's road is provided with the reinforced concrete arch of annular in the side in navigation channel dorsad
Circle, described armored concrete arch ring is layered setting from top to bottom, from outside to inside, and next stringcourse circle internal diameter is little
In adjacent last layer arch ring internal diameter, between the arch ring that every two-layer is adjacent engaged reach sealing and support also
The effect of fixation steel plate pile water stopping curtain, described arch ring is from top to bottom 3 to 6 layers.
According to the present invention of said structure, being further characterized in that, described each steel sheet pile cross section is " C " type
Structure, adjacent steel sheet pile is relative two-by-two, and side is engaged formation water-stop curtain each other.
According to the present invention of said structure, being further characterized in that, the plane of described the superiors arch ring is less than construction
The plane of sidewalk.
According to the present invention of said structure, being further characterized in that, described armored concrete arch ring is the most horizontal
Cross section width 80cm × high 150cm, between levels arch ring, length of action is 30cm in the direction of the width, high
On degree direction, length of action is 10cm, forms waterstop between levels arch ring.
According to the present invention of said structure, builder's road for big machineries such as excavators or manually can be executed
Work uses, steel sheet pile water-stop curtain can effective sealing, several layers of armored concrete arch ring in addition to can be with sealing,
Steel sheet pile water-stop curtain can also be formed powerful support and fix, it is ensured that the stability of supporting construction.In boat
Cushion cap foundation ditch is excavated in building the arch ring on island in artificial cofferdam, side, road, can carry out executing smoothly of Main Pier of Bridges cushion cap
Work, effectively overcomes the geology by side, navigation channel complexity, hydrology structure and feature to Main Pier of Bridges bearing platform construction
Adverse effect, solve river water level change, river pressure and river immerse foundation ditch affects Main Pier of Bridges
The construction problem of cushion cap.
According to the construction method of the Main Pier of Bridges cushion cap foundation pit supporting construction on the basement rock of abrupt slope, above-mentioned river course, it is special
Levy and be, comprise the steps:
1) the intersection construction in abrupt slope, river course basement rock and navigation channel forms cofferdam and builds island, by sandstone dirt bed
Landfill, is formed and builds island higher than the cofferdam of urban river water plane；
2) at the cofferdam Zhu Dao edge inserted to play steel sheet pile water-stop curtain by side, navigation channel, described steel sheet pile is only
The steel sheet pile that water curtain is vertically arranged side by side by several is constituted, and described adjacent steel sheet pile side is each other
Occlusion, prevents the infiltration of river；
3) in steel sheet pile water-stop curtain side, navigation channel dorsad, arranging builder's road, described builder's road is for along enclosing
The annular sandstone dirt bed on Yan Zhu island is constituted, and described builder's road plane is less than described steel sheet pile sealing curtain
The end face of curtain；
4) described builder's road pours the armored concrete arch ring of annular, described steel in the side in navigation channel dorsad
Reinforced concrete arch ring from top to bottom, placement layer by layer from outside to inside, next stringcourse circle internal diameter is less than adjacent upper one
Stringcourse circle internal diameter, the engaged stagnant water effect that reaches, top concrete arch between the arch ring that every two-layer is adjacent
The end face of circle is less than the plane of builder's road, and described arch ring is 3 to 6 layers, the most transversal face width of arch ring
80cm × high 150cm, between levels arch ring, length of action is 30cm in the direction of the width, in short transverse
Length of action is 10cm, forms waterstop between levels arch ring；
5) carrying out inside described arch ring excavating forming cushion cap foundation ditch, in described foundation ditch, the infiltration of a small amount of river uses
Water pumper is uninterruptedly extracted out, it is simple to carry out the smooth construction of Main Pier of Bridges cushion cap.
According to said structure and the present invention of construction method, it has the beneficial effects that: builder's road can be for digging
Big machineries such as pick machine or manually carry out construction usage, steel sheet pile water-stop curtain can effectively sealing, several layers of steel
Reinforced concrete arch ring is in addition to can be with sealing, it is also possible to steel sheet pile water-stop curtain is formed powerful support and fixes
Effect, it is ensured that the stability of supporting construction, carries out excavating also in the arch ring on island is built in artificial cofferdam, side, navigation channel
Form cushion cap foundation ditch, the smooth construction of Main Pier of Bridges cushion cap can be carried out, effectively overcome by side, navigation channel complicated
Geology, the hydrology structure and the feature adverse effect to Main Pier of Bridges bearing platform construction, solve river water level become
Change, river pressure and river immerse foundation ditch and affect the construction problem of Main Pier of Bridges cushion cap, and the present invention can have
Effect realizes the sealing of foundation ditch, waterproof, ensures underwater support table deep pit construction and the smooth construction of cushion cap part,
While guaranteeing deep pit monitor, improve construction speed and quality, reduce construction cost.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings and the present invention is conducted further description by embodiment:
Fig. 1 is the Main Pier of Bridges cushion cap foundation pit supporting construction vertical section schematic diagram on the basement rock of abrupt slope, river course of the present invention；
Fig. 2 is the Main Pier of Bridges cushion cap foundation pit supporting construction solid section signal on the basement rock of abrupt slope, river course of the present invention
Figure；
Fig. 3 is steel sheet pile water-stop curtain of the present invention and armored concrete arch ring top view；
Fig. 4 is armored concrete arch ring vertical section of the present invention schematic diagram.
In the drawings, 1, island is built in cofferdam；2, cushion cap；3, Main Pier of Bridges；4, abrupt slope basement rock；5, arch ring；
6, steel sheet pile；7, river；8, builder's road；9, foundation ditch.
Detailed description of the invention
As shown in Figure 1,2,3, 4, the Main Pier of Bridges cushion cap foundation ditch on the basement rock of abrupt slope, a kind of river course of the present invention props up
Protection structure, builds island 1 including a cofferdam, it is characterised in that island 1 is built near navigation channel, river course in described cofferdam
Side is provided with steel sheet pile water-stop curtain, and described steel sheet pile water-stop curtain is vertically arranged side by side by several
Steel sheet pile 6 is constituted, and described adjacent steel sheet pile 6 side is engaged formation water-stop curtain, described steel each other
Sheet pile water-stop curtain is provided with the builder's road 8 that the sandstone dirt bed of annular is constituted, institute in the side in navigation channel dorsad
Builder's road 8 plane stated is less than the end face of described steel sheet pile water-stop curtain, and described builder's road 8 is at the back of the body
Be provided with the armored concrete arch ring 5 of annular to the side in navigation channel, described armored concrete arch ring 5 is by up to
Under, be layered setting from outside to inside, next stringcourse circle 5 internal diameter is less than adjacent last layer arch ring 5 internal diameter, often
The engaged effect reaching sealing and supporting also fixation steel plate pile water stopping curtain between the arch ring 5 that two-layer is adjacent,
Described arch ring 5 is from top to bottom 3 to 6 layers.
As shown in Figure 2,3, described each steel sheet pile 6 cross section is " C " type structure, adjacent steel sheet pile 6
Relative two-by-two, side is engaged formation water-stop curtain each other.
As shown in Fig. 1,2,4, the plane of described the superiors arch ring 5 is less than the plane of builder's road 8.
As shown in Figure 2,4, described the most transversal face width 80cm of armored concrete arch ring 5 × high 150cm,
Between levels arch ring, length of action is 30cm in the direction of the width, and in short transverse, length of action is 10cm,
Waterstop is formed between levels arch ring.
As shown in Figure 1,2,3, 4, according to the Main Pier of Bridges cushion cap pattern foundation pit supporting structure on the basement rock of abrupt slope, above-mentioned river course
The construction method of structure, it is characterised in that comprise the steps:
1) the intersection construction in abrupt slope, river course basement rock and navigation channel forms cofferdam and builds island 1, by sandstone dirt bed
Landfill, formed and build island 1 higher than the cofferdam of urban river water plane；
2) at the cofferdam Zhu Dao 1 edge inserted to play steel sheet pile water-stop curtain by side, navigation channel, described steel sheet pile
The steel sheet pile 6 that water-stop curtain is vertically arranged side by side by several is constituted, described adjacent steel sheet pile 6 side that
This is engaged, prevents the infiltration of river；
3) in steel sheet pile water-stop curtain side, navigation channel dorsad, arranging builder's road 8, described builder's road 8 is
The annular sandstone dirt bed building island 1 along cofferdam is constituted, and described builder's road 8 plane is less than described steel plate
The end face of pile water stopping curtain；
4) described builder's road 8 pours the armored concrete arch ring 5 of annular in the side in navigation channel dorsad, described
Armored concrete arch ring 5 from top to bottom, placement layer by layer from outside to inside, next stringcourse circle 5 internal diameter is less than phase
Adjacent last layer arch ring 5 internal diameter, engaged between the arch ring 5 that every two-layer is adjacent reaches stagnant water effect,
The end face of top layer concrete arch ring 5 is less than the plane of builder's road 8, and described arch ring is 3 to 6 layers, arch
Enclosing the most transversal face width 80cm × high 150cm, between levels arch ring, length of action is in the direction of the width
30cm, in short transverse, length of action is 10cm, forms waterstop between levels arch ring；
5) carrying out inside described arch ring 5 excavating forming cushion cap foundation ditch 9, in described foundation ditch 9, a small amount of river oozes
Hydromining water pumper is uninterruptedly extracted out, it is simple to carry out the smooth construction of Main Pier of Bridges cushion cap.
Applicating example of the present invention:
Zigong City Fushun County, Sichuan Province of China a small bay in a river Jiang Sanqiao 2# cushion cap deep foundation pit supporting structure and construction method are i.e.
It is the example of the application present invention, Fu Shi town, big spanning locality and East Lake town, across a small bay in a river rivers, apply the present invention
2# cushion cap deep foundation pit supporting structure be that bridge smooth construction lays the foundation, this engineering construction be completed after, with four
River provincial highway S305 line connects, and is formed rich and smooth around city circuit, greatly improves the traffic shape of Fushun County access way
Condition.
Although the present invention describes with reference to the above embodiments, but those of ordinary skill in the art
Be fully able to will be apparent from recognizes that above embodiment is only for the present invention is described, wherein can make various change
Change and amendment and in a broad sense without departing from the present invention, so being not intended as limitation of the invention, if
In the spirit of the present invention, change, deformation to embodiment described above fall within the present invention and want
Within the protection domain asked.
Claims (5)
1. the Main Pier of Bridges cushion cap foundation pit supporting construction on the basement rock of abrupt slope, river course, builds island including a cofferdam,
It is characterized in that, described cofferdam is built island and the side near navigation channel, river course is provided with steel sheet pile water-stop curtain, institute
The steel sheet pile that the steel sheet pile water-stop curtain stated vertically is arranged side by side by several is constituted, described adjacent steel sheet pile
Side is engaged formation water-stop curtain each other, and described steel sheet pile water-stop curtain is arranged in the side in navigation channel dorsad
Having the builder's road that the sandstone dirt bed of annular is constituted, described builder's road plane is less than described steel sheet pile
The end face of water-stop curtain, described builder's road is provided with the reinforced concrete arch of annular in the side in navigation channel dorsad
Circle, described armored concrete arch ring is layered setting from top to bottom, from outside to inside, and next stringcourse circle internal diameter is little
In adjacent last layer arch ring internal diameter, between the arch ring that every two-layer is adjacent engaged reach sealing and support also
The effect of fixation steel plate pile water stopping curtain, described arch ring is from top to bottom 3 to 6 layers.
Main Pier of Bridges cushion cap foundation pit supporting construction on the basement rock of abrupt slope, river course the most according to claim 1,
Being further characterized in that, described each steel sheet pile cross section is " C " type structure, and adjacent steel sheet pile is relative two-by-two,
Side is engaged formation water-stop curtain each other.
Main Pier of Bridges cushion cap foundation pit supporting construction on the basement rock of abrupt slope, river course the most according to claim 1,
Being further characterized in that, the plane of described the superiors arch ring is less than the plane of builder's road.
Main Pier of Bridges cushion cap foundation pit supporting construction on the basement rock of abrupt slope, river course the most according to claim 1,
It is further characterized in that, described the most transversal face width 80cm of armored concrete arch ring × high 150cm, up and down
Between stringcourse circle, length of action is 30cm in the direction of the width, and in short transverse, length of action is 10cm, up and down
Waterstop is formed between stringcourse circle.
5. a construction method for the Main Pier of Bridges cushion cap foundation pit supporting construction on the basement rock of abrupt slope, river course, its feature
It is, comprises the steps:
1) the intersection construction in abrupt slope, river course basement rock and navigation channel forms cofferdam and builds island, by sandstone dirt bed
Landfill, is formed and builds island higher than the cofferdam of urban river water plane；
2) at the cofferdam Zhu Dao edge inserted to play steel sheet pile water-stop curtain by side, navigation channel, described steel sheet pile is only
The steel sheet pile that water curtain is vertically arranged side by side by several is constituted, and described adjacent steel sheet pile side is each other
Occlusion, prevents the infiltration of river；
3) in steel sheet pile water-stop curtain side, navigation channel dorsad, arranging builder's road, described builder's road is for along enclosing
The annular sandstone dirt bed on Yan Zhu island is constituted, and described builder's road plane is less than described steel sheet pile sealing curtain
The end face of curtain；
4) described builder's road pours the armored concrete arch ring of annular, described steel in the side in navigation channel dorsad
Reinforced concrete arch ring from top to bottom, placement layer by layer from outside to inside, next stringcourse circle internal diameter is less than adjacent upper one
Stringcourse circle internal diameter, the engaged stagnant water effect that reaches, top concrete arch between the arch ring that every two-layer is adjacent
The end face of circle is less than the plane of builder's road, and described arch ring is 3 to 6 layers, the most transversal face width of arch ring
80cm × high 150cm, between levels arch ring, length of action is 30cm in the direction of the width, in short transverse
Length of action is 10cm, forms waterstop between levels arch ring；
5) carrying out inside described arch ring excavating forming cushion cap foundation ditch, in described foundation ditch, the infiltration of a small amount of river uses
Water pumper is uninterruptedly extracted out, it is simple to carry out the smooth construction of Main Pier of Bridges cushion cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510447090.3A CN105064373B (en) | 2015-07-28 | 2015-07-28 | Foundation pit supporting structure of bridge main pier bearing platform on river channel steep slope bedrock and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510447090.3A CN105064373B (en) | 2015-07-28 | 2015-07-28 | Foundation pit supporting structure of bridge main pier bearing platform on river channel steep slope bedrock and construction method thereof |
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| Publication Number | Publication Date |
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| CN105064373A CN105064373A (en) | 2015-11-18 |
| CN105064373B true CN105064373B (en) | 2016-09-21 |
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| CN201510447090.3A Expired - Fee Related CN105064373B (en) | 2015-07-28 | 2015-07-28 | Foundation pit supporting structure of bridge main pier bearing platform on river channel steep slope bedrock and construction method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110952605A (en) * | 2019-10-23 | 2020-04-03 | 中船第九设计研究院工程有限公司 | Operation platform is consolidated to river bank building foundation |
| CN112376593A (en) * | 2020-10-26 | 2021-02-19 | 上海市政工程设计研究总院（集团）有限公司 | Gravity type cofferdam and construction method |
| CN113463518B (en) * | 2021-06-21 | 2022-12-09 | 中铁十九局集团第五工程有限公司 | Anti-leakage construction method for soil between piles of existing bridge pile foundation |
| CN114232647A (en) * | 2021-11-30 | 2022-03-25 | 中交路桥建设有限公司 | Foundation pile reinforced structure, cofferdam and foundation pit construction structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034233C (en) * | 1992-09-18 | 1997-03-12 | 中国建筑科学研究院珠海科研设计部 | Closed arch ring retaining structure and its construction method |
| KR20110120627A (en) * | 2010-04-29 | 2011-11-04 | 남봉수 | Method of construction for scour prevension and reinforcement of bridge pier, and structure of the same |
| CN204875807U (en) * | 2015-07-28 | 2015-12-16 | 中国十九冶集团有限公司 | Bridge main pier cushion cap foundation pit supporting structure on river channel abrupt slope basement rock |
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