CN215887944U - Island platform is built in advancing of deep water high flow velocity river course embankment - Google Patents
Island platform is built in advancing of deep water high flow velocity river course embankment Download PDFInfo
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- CN215887944U CN215887944U CN202122013349.7U CN202122013349U CN215887944U CN 215887944 U CN215887944 U CN 215887944U CN 202122013349 U CN202122013349 U CN 202122013349U CN 215887944 U CN215887944 U CN 215887944U
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- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims abstract description 10
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- 229910000831 Steel Inorganic materials 0.000 claims description 35
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Abstract
The utility model discloses a deep water high flow velocity river way dike embankment platform, comprising: the initial section is formed by filling the slag material, one end of the initial section extends to the direct access passage, and the other end of the initial section extends along the downstream of the river channel; the closure section is formed by filling stones in the reinforced gabion and then filling the reinforced gabion with the stones, and the closure section is positioned in the middle closure area of the river channel; the connecting sections are arranged between the starting section and two ends of the closure section and are formed by filling stones in the alloy steel wire net bag; the construction section is arranged between a connecting section at the downstream of the river channel and the closure section, and is formed by filling sand bags and gravels; and the middle section is formed by an area surrounded by the starting section, the closure section, the connecting sections at two sides and the construction section, and the middle section is formed by filling gravel soil. The utility model has the advantages of convenient and economic material acquisition of the island building platform and thin covering layer of riverbed in deep water and high flow rate.
Description
Technical Field
The utility model relates to the field of civil engineering bridge lower part foundation construction. More specifically, the utility model relates to a deep water high flow velocity river dike embankment platform.
Background
In China, a plurality of construction methods are adopted for deep-water bridge foundation platforms, and a steel platform (steel cofferdam), an earth cofferdam, an earth bag cofferdam, a bamboo cage, a wood cage, a lead wire cage, a steel cage cofferdam, a membrane bag cofferdam and the like are generally adopted. The steel platform is usually used for a deepwater riverway with a larger covering layer at the bottom of a riverbed, large-scale hoisting equipment is required to be adopted for installation, and the positioning of the steel platform is greatly influenced by the water flow speed. The earth cofferdam is generally used for the water depth within 1.5m, the flow velocity within 0.5m/s, the material taking is wide, the filling method is simple and fast, but the earth cofferdam is not suitable for the soil riverbed with larger water permeability. The earth bag cofferdam is usually used for the soil riverbed with the water depth within 3m and the flow speed within 1.5m/s, but is not suitable for the soil riverbed with larger water permeability. When the water depth is within 4m, the flow velocity is high and the flood discharge requirement can be met, bamboo cages, wood cages or lead wire cage cofferdams can be built; and building a steel cage cofferdam when the water depth exceeds 4 m. The membrane bag cofferdam is usually used in the area with water depth within 5m, flow rate within 3.0m/s, good stability, high compactness, small sedimentation and good wave-proof effect, is more suitable for coastal low-altitude low water head, rich fine sand resources, easy mining and transportation area, and is used when the riverbed is required to be flat and gentle.
Based on the special construction background of the application, the application is a deep-water high-flow-rate river channel, the water depth is about 5m in dry seasons, the water flow rate reaches 3.87m/s, and the conventional construction method is difficult to construct. The river that this application was under construction is not navigable, and large-scale construction equipment can't get into, consequently can't adopt steel cofferdam steel boxed platform. The conventional filling material is easy to wash away by water due to the high water flow speed, the filling is carried out towards the center of the river, and the filling material is easy to wash away due to the narrowing of the river channel and the high water flow speed, so that the construction safety risk is high. If fill with the big stone that is difficult to be washed away by water, can the problem of solving, but the foundation platform that later stage filling construction was accomplished still need carry out pile construction and form pile foundation cushion cap etc. and big stone is filled and is unfavorable for very much excavating pile construction, and the risk is great, and big stone is filled the gap simultaneously great, and easy infiltration influences the construction of follow-up bridge foundation.
Therefore, in order to solve the limitation of the prior art scheme, the prior cofferdam technology and optimization improvement are needed, the problem of difficult construction of the bridge foundation in water is solved, the technical problems that under the conditions of deep water and high flow velocity, the flow of the closure section after the river channel is narrowed is increased, the closure advancing and platform protection difficulty is high, the river bed foundation is seriously scoured, and the stability of the construction platforms at two sides is threatened are overcome, so that the cofferdam material is convenient and economic to obtain, and can be suitable for the deep water and high flow velocity river channels.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a deep water high-flow-velocity river dike embankment building platform which has the advantages of convenience and economy in material acquisition and suitability for a thin covering layer of a deep water high-flow-velocity river bed.
To achieve these objects and other advantages in accordance with the present invention, there is provided a deep water high flow rate channel berm encroaching island platform comprising:
the river bank structure comprises an initial section, a first bridge and a second bridge, wherein the initial section is positioned on a river beach, the initial section is formed into an L-shaped structure through stone slag filling, one end of the initial section extends to a direct access way perpendicular to an existing road on a river bank, and the other end of the initial section extends along the downstream of a river channel;
the closure opening section is of a U-shaped structure with an opening facing the initial section, the closure opening section is formed by filling stones in a reinforced gabion and then filling the reinforced gabion with the stones, and the closure opening section is positioned in a middle closure opening area of a river channel;
the connecting sections are arranged between the starting section and two ends of the closure section and are formed by filling stones in the alloy steel wire net bag;
the construction section is arranged between a connecting section and a closure section at the downstream of the river channel, the construction section is formed by filling sand bags and gravels, and the construction section is positioned in a foundation area of the steel trestle;
the middle section is formed by an area surrounded by the starting section, the closure section, the connecting sections at two sides and the construction section, the middle section is formed by filling gravel soil, and the middle section is a bridge foundation construction area;
wherein, initial section, longkou district section, linkage segment, construction section and middle section are all at same elevation, and the elevation is higher than the river course surface of water, the stone particle diameter of filling in the linkage segment is less than the stone particle diameter of filling in the longkou district section.
Preferably, the outer sides of the starting section, the closure section and the connecting section are filled to form a water-facing slope.
Preferably, the closure spout section is formed by stacking a plurality of square steel reinforcement gabions, adjacent steel reinforcement gabions are connected through steel wire rope buckles, and the water-facing slope surface of the closure spout section is filled through the slag stone protection slope so that the slope ratio of the water-facing slope surface of the closure spout section is not less than 1: 1.3.
Preferably, the slope toe of the closure section forms a bottom protection section by filling rubbles to protect the bottom.
Preferably, the steel bar reinforced concrete pouring spout further comprises a head wrapping section, wherein arc-shaped flip rock heads are formed at two corners of the outer side of the spout section through filling, the corresponding upstream side is formed by filling a steel bar gabion and an alloy steel wire net bag, and the corresponding downstream side is formed by filling an alloy steel wire net bag.
Preferably, the toe of the initial section upstream of the waterway extends to the end face of the closure section.
The utility model at least comprises the following beneficial effects:
the construction method is simple and reliable in structure and convenient to operate, solves the problems of difficulty in bridge foundation construction and the like under the condition of deep water and high flow velocity, saves construction period, improves the working environment of constructors, improves foundation pit excavation efficiency, saves lease cost and access cost of large hoisting and hoisting equipment, and effectively avoids various problems in the construction process.
Safety: this platform is as bridge foundation construction on water, and reinforcing bar gabion stability is good, effectively resists the flow of river course restrainting narrow dawn section and velocity of flow increase platform scour resistance, avoids cushion cap excavation back, and cofferdam slope unstability has improved the security in the work progress.
Secondly, economy: the platform mainly comprises stone ballast materials, rock blocks, a reinforcement cage and a steel wire net bag, is wide and convenient in material taking, low in price, capable of saving lease and entrance and exit expenses of large-scale hoisting equipment, high in earth-rock cofferdam filling work efficiency and capable of greatly reducing construction cost.
Convenience: after the platform is filled, the bridge foundation is located on land for dry construction operation, the field is wide, the bridge foundation and the maintenance structure can be conveniently and synchronously operated in a crossed mode, the construction period is shortened, and the construction of the bridge pile foundation and the bearing platform is convenient and fast.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
FIG. 1 is a schematic overall structure diagram of the island building platform of the present invention;
FIG. 2 is a schematic plan view of the island platform of the present invention;
FIG. 3 is a schematic elevation structure of the island building platform of the present invention;
fig. 4 is an enlarged view of the islanding platform from one side of fig. 3.
Description of reference numerals:
1. the method comprises the following steps of 1, connecting a sidewalk sequentially, 2, building an island platform, 3, an initial section, 4, a closure section, 5, a connecting section, 6, a middle section, 7, a construction section, 8, a bottom protecting section, 9, a head wrapping section, 10, a top slope line of the island building platform, 11 and a bottom slope line of the island building platform.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the utility model by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the orientation shown in the drawings of the present application, the lower side is the upstream side, and the upper side is the downstream side.
As shown in fig. 1 to 4, the utility model provides a deep water high flow velocity river dike embankment platform, comprising:
the river bank starting device comprises a starting section 3, a river bank, a river channel and a water channel, wherein the starting section 3 is located on the river bank, the starting section 3 is formed into an L-shaped structure through stone slag filling, one end of the starting section 3 extends to an on-road access way 1 perpendicular to an existing road on a river bank, and the other end of the starting section 3 extends along the downstream of the river channel;
the closure section 4 is of a U-shaped structure with an opening facing the initial section 3, the closure section 4 is formed by filling stones in a reinforcement gabion, and then filling the reinforcement gabion with stones, and the closure section 4 is located in a middle closure area of a river channel;
the connecting sections 5 are arranged between the two ends of the initial section 3 and the two ends of the closure section 4, and the connecting sections 5 are formed by filling the alloy steel wire mesh bags with stones;
the construction section 7 is arranged between the connecting section 5 and the closure section 4 at the downstream of the river channel, the construction section 7 is formed by filling sand bags and gravels, and the construction section 7 is positioned in a foundation area of the steel trestle;
the middle section 6 is formed by an area enclosed by the starting section 3, the closure section 4, the connecting sections 5 at two sides and the construction section 7, the middle section is filled by gravel soil, and the middle section 6 is a bridge foundation construction area;
wherein, originated section 3, longkou district section 4, linkage segment 5, construction section 7 and middle section 6 are all at same elevation, and the elevation is higher than the river course surface of water, about 1m probably, the stone particle diameter of filling in the linkage segment 5 is less than the stone particle diameter of filling in the longkou district section 4.
In the technical scheme, the initial section 3 is formed by filling stone slag materials, is positioned on a river beach, is mainly a cofferdam filling initial section 3 and is used as a main transport channel occupied by the cofferdam. The dragon mouth section 4 is formed by stacking steel bar gabions, large stones are filled in the dragon mouth section, the dragon mouth section is located in the middle of a river channel, and water flow force scouring is resisted after the river channel is narrowed. The connecting section 5 is positioned at the intersection angle of the cofferdam and the river beach and is used for connecting the initial section 3 with the closure section 4, so that the anti-scouring capability of the slope surface scoured by the eddy current in the area is improved. Middle section 6 is sand gravel soil filling, is located the river course in the middle of, and the bridge foundation scope, and stability can the reinforce, does benefit to the anti-excavation during later stage bridge foundation construction. The construction section 7 is formed by loading gravel through the sand bags, is positioned in the foundation area of the steel trestle and is convenient for later-stage construction of the steel trestle.
The alloy steel wire gabion protection adopts an alloy steel wire mesh for containing medium and small stones, the weight of each small gabion is 3-5t, and the weight of each large gabion is 8-10 t. The small alloy steel wire gabion is used for filling the upstream starting section 3 and the closure section 4, and the large alloy steel wire gabion is used for protecting side slopes at the side of the downstream revetment and is constructed in an excavator filling and throwing filling mode.
And (3) performing bridge pile foundation construction on the middle section 6 of the island building platform 2 formed by the construction, simultaneously performing pile cap excavation construction, and also erecting a steel trestle to provide a construction platform for flood season and superstructure construction.
In another technical scheme, the outer sides of the starting section 3, the closure section 4 and the connecting section 5 are filled to form a water-facing slope. Fig. 2 shows a platform top slope line 10 and a platform foot slope line 11.
In another technical scheme, the closure section 4 is formed by stacking a plurality of square steel reinforcement gabions, the adjacent steel reinforcement gabions are connected through steel wire rope buckles, and the water-facing slope surface of the closure section 4 is filled through the slag stone protection slope, so that the slope ratio of the water-facing slope surface of the closure section 4 is not less than 1: 1.3. The steel reinforcement gabion is square in structure, and the outer side face of the steel reinforcement gabion can only be stepped, a slope protection structure is formed by filling slag stones, the water-facing slope surface of the tap section 4 forms a certain slope ratio to meet the scouring requirement, and the upper surface of the tap section 4 is also filled with the slag stones as required to form a plane.
In another technical scheme, the toe of the closure section 4 is protected by filling rubbles to form a bottom protection section 8 which is in a 3 shape. In one embodiment, after the whole entering and occupying is finished, a 20-30cm thick stone cage bottom protector is arranged on the upstream slope foot of the dragon mouth section 4, the width of the bottom protector is arranged to be 2m of the upward slope foot and 4m of the downward slope foot, and the length of the bottom protector is not less than 10m in the direction of the upward and downward deep shoreside respectively.
In another technical scheme, the device further comprises a head wrapping section 9, wherein arc-shaped flip rock heads are formed at two corners of the outer side of the faucet section 4 by filling, a corresponding upstream side is formed by filling a reinforced gabion and an alloy steel wire net bag, and a corresponding downstream side is formed by filling an alloy steel wire net bag.
In the technical scheme, in order to reduce the water side scouring of the construction platform on the downstream side of the dike (road), the dikes on the upstream sides of the construction platforms on both sides advance to the riverbed by 5m more and have the width of 4m to form a flip rock head, and the throwing reinforced gabion and the large alloy steel wire net bag (single 8-10t) form an anti-wrapping head. And (3) filling 2m in a water flow convolution area at the downstream corner within 10m, and adopting a small alloy steel wire gabion (single 3-5t) for strengthening protection.
In another technical scheme, the toe of the initial section 3 at the upstream of the river channel extends to the end surface of the closure section 4, a triangular area is formed in the middle, and an alloy steel wire tuck net is filled to form a connecting section 5.
The specific construction method of the island building platform comprises the following steps:
step S1: filling an initial section structure, pushing from two banks of a river channel to the center of the river channel, filling to a set position through stone slag materials, and then, vibrating and rolling for a plurality of times, for example 4-6 times, by adopting a 25T self-propelled road roller;
step S2: filling stones in the prefabricated reinforced gabions, carrying out pull conveying on the stones to an initial section by adopting a flat car, and then sequentially hoisting the reinforced gabions to a set position by using an 80t crawler crane to complete filling of the closure section;
the filling sequence of the reinforced gabion in the step S2 is as follows: according to the calculated and set width, firstly placing the reinforcement gabion on the upstream side, then placing the reinforcement gabion close to the middle section side, and finally placing the reinforcement gabion on the downstream side; in the process of sequentially placing the reinforcement cages, the pushing and filling work of the gravel soil in the middle section in the step S4 is performed at a set distance, for example, about 5 m; finishing the entering and occupying work of the reinforcement gabions from upstream to downstream in sequence, adopting phi 18 steel core short steel wire ropes for buckling connection after the reinforcement gabions are out of the water, and ensuring that the whole reinforcement gabions are stable because adjacent reinforcement gabions are connected for at least 2 times;
in the process of placing the reinforcement gabion, according to the swinging condition of a hoisting steel wire rope after the reinforcement gabion sinks in water through a hoisting heuristic method, when the actual reinforcement gabion is placed, the reinforcement gabion is placed from an upstream certain distance and is just placed to a set position under the impact of water flow, the horizontal and stable placement of the reinforcement gabion is guaranteed as much as possible, meanwhile, in order to observe that the reinforcement gabion is not inclined towards a bearing table side of a middle section, when the reinforcement gabion is machined, two convex reinforcing steel bars with the diameter of phi 20 are welded on the inner side of the reinforcement gabion, the length of the reinforcing steel bars is 6m, the deviation condition of the reinforcement gabion is observed through a theodolite, the position of the reinforcement gabion is adjusted in time, and the reinforcement gabion is guaranteed to be placed to the set position;
step S3: after the steel bar gabion occupies, stones are loaded through the alloy steel wire net bags to form a plurality of alloy steel wire net bag filling units, and the alloy steel wire net bag filling units are hoisted through the 80t crawler belt to be filled between an upstream initial section and a dragon area section to form an upstream connecting section;
step S4: filling gravel soil in the middle section, and then sequentially filling a plurality of alloy steel wire net bag filling units and a plurality of bags of sand bags and gravels between the downstream starting section and the closure section to form a downstream connecting section and a construction section for stacking sand bags at the foundation position of the trestle;
step S5: carrying out slag stone slope protection filling on the upstream surface of the reinforcement gabion of the closure section to form a water-facing slope surface (filling slope ratio is not less than 1:1.3), and forming a bottom protection section on the slope foot of the water-facing slope surface of the closure section through stone slab bottom protection construction;
step S6: the two corners of the outer side of the tap section are filled with more filling materials to form a flow regulating rock head, a head wrapping section is formed, the upstream side is filled with a steel reinforcement gabion and an alloy steel wire net bag, and the downstream side is filled with the alloy steel wire net bag.
While embodiments of the utility model have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the utility model pertains, and further modifications may readily be made by those skilled in the art, it being understood that the utility model is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (6)
1. A deep water high flow velocity river dike embankment advancing island building platform is characterized by comprising:
the river bank structure comprises an initial section, a first bridge and a second bridge, wherein the initial section is positioned on a river beach, the initial section is formed into an L-shaped structure through stone slag filling, one end of the initial section extends to a direct access way perpendicular to an existing road on a river bank, and the other end of the initial section extends along the downstream of a river channel;
the closure opening section is of a U-shaped structure with an opening facing the initial section, the closure opening section is formed by filling stones in a reinforced gabion and then filling the reinforced gabion with the stones, and the closure opening section is positioned in a middle closure opening area of a river channel;
the connecting sections are arranged between the starting section and two ends of the closure section and are formed by filling stones in the alloy steel wire net bag;
the construction section is arranged between a connecting section and a closure section at the downstream of the river channel, the construction section is formed by filling sand bags and gravels, and the construction section is positioned in a foundation area of the steel trestle;
the middle section is formed by an area surrounded by the starting section, the closure section, the connecting sections on two sides and the construction section, the middle section is formed by filling sand gravel soil, and the middle section is a bridge foundation construction area;
wherein, initial section, longkou district section, linkage segment, construction section and middle section are all at same elevation, and the elevation is higher than the river course surface of water, the stone particle diameter of filling in the linkage segment is less than the stone particle diameter of filling in the longkou district section.
2. The deep water high flow velocity river channel dike advancing island building platform as claimed in claim 1, wherein the outside edges of the initial section, the closure section and the connecting section are filled to form an upstream slope.
3. The deep water high flow speed river channel dike embankment advancing island building platform according to claim 2, wherein the closure section is formed by stacking a plurality of square steel reinforcement gabions, adjacent steel reinforcement gabions are connected through steel wire rope buckles, and the water-facing slope surface of the closure section is filled through slag stone protection slope, so that the water-facing slope surface slope ratio of the closure section is not less than 1: 1.3.
4. The deep water high flow rate river channel dike advancing island building platform according to claim 3, characterized in that the toe of the closure section forms a bottom protection section by filling a piece of stone to protect the bottom.
5. The platform of claim 1, further comprising a wrapping section, wherein the wrapping section forms arc-shaped flip rock heads at two corners of the outer side of the closure section by filling, the upstream side corresponding to the platform is formed by filling a steel bar gabion and an alloy steel wire net bag, and the downstream side corresponding to the platform is formed by filling an alloy steel wire net bag.
6. The deep water high flow rate river channel berm access island building platform of claim 2, wherein the toe of the initial section upstream of the river channel extends to the end face of the closure section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122013349.7U CN215887944U (en) | 2021-08-25 | 2021-08-25 | Island platform is built in advancing of deep water high flow velocity river course embankment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122013349.7U CN215887944U (en) | 2021-08-25 | 2021-08-25 | Island platform is built in advancing of deep water high flow velocity river course embankment |
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| Publication Number | Publication Date |
|---|---|
| CN215887944U true CN215887944U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122013349.7U Withdrawn - After Issue CN215887944U (en) | 2021-08-25 | 2021-08-25 | Island platform is built in advancing of deep water high flow velocity river course embankment |
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| CN (1) | CN215887944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737654A (en) * | 2021-08-25 | 2021-12-03 | 中交第二航务工程局有限公司 | Deepwater high-flow-rate river dike embankment advancing island building platform and construction method thereof |
-
2021
- 2021-08-25 CN CN202122013349.7U patent/CN215887944U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737654A (en) * | 2021-08-25 | 2021-12-03 | 中交第二航务工程局有限公司 | Deepwater high-flow-rate river dike embankment advancing island building platform and construction method thereof |
| CN113737654B (en) * | 2021-08-25 | 2024-10-11 | 中交第二航务工程局有限公司 | Deepwater high-flow-rate river dike occupying island construction platform and construction method thereof |
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