CN212561531U - Material taking platform structure of cofferdam back slope tower crane - Google Patents
Material taking platform structure of cofferdam back slope tower crane Download PDFInfo
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- CN212561531U CN212561531U CN202020755568.5U CN202020755568U CN212561531U CN 212561531 U CN212561531 U CN 212561531U CN 202020755568 U CN202020755568 U CN 202020755568U CN 212561531 U CN212561531 U CN 212561531U
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Abstract
The utility model discloses a material platform structure is got to cofferdam back slope tower machine. A retaining wall with a slope ratio of 1: 0.5-0.7 is arranged at the bottom of a cofferdam back slope, the retaining wall is arranged into a closed structure with one, two or three surfaces according to the cofferdam back slope structure, stone slag is backfilled in the retaining wall, and top concrete is poured to form a material taking platform with a planar structure; the retaining wall is formed by orderly misplacing and horizontally stacking steel reinforcement gabions with a cubic structure, the thickness of the retaining wall at least comprises two steel reinforcement gabions which are horizontally connected in a transverse mode, and foundation insertion ribs which penetrate downwards into cofferdam back slope bedrock and are not less than 3m are welded on the first steel reinforcement gabion at the bottom of the retaining wall. The utility model provides a arrange the tower machine between dam and the cofferdam and get the problem of material platform, it is fast to get the construction of material platform structure construction, and the cost is lower, and stability is good, presses heavy construction at cofferdam back slope and gets the material platform, has strengthened the overall stability in cofferdam, gets the material platform and be solid construction, does not have the not enough problem of bearing capacity, can carry out the scale nature and unload, get the material.
Description
Technical Field
The utility model belongs to the technical field of hydraulic construction engineering, in particular to set up the building structure that the tower machine got material platform in cofferdam back slope among the hydraulic construction engineering.
Background
In the construction of water conservancy and hydropower engineering, a water retaining dam is generally constructed on a river channel. The water in the river channel flows through a diversion tunnel or diversion open channel arranged on one side or two sides of the river channel. In the construction process of the dam, a gantry crane or a tower crane is generally arranged at the upstream and downstream positions of the dam so as to hoist materials required by dam construction. When the tower crane lifts materials, a material taking platform is needed for the tower crane to take materials. In the existing hydroelectric engineering construction, in order to reduce the engineering investment, the space between a dam and a cofferdam is generally arranged very compactly, and the field is very narrow; at the moment, a relatively flat and wide material taking platform cannot be normally formed in the field between the dam and the cofferdam, and the tower crane cannot normally take materials. Then, a material taking platform must be formed within the coverage range of the suspension arm of the tower crane, otherwise, the tower crane loses the corresponding function; and the position of the platform must meet the position which can be reached by automobile transportation, and the size of the platform must meet the requirement of unloading by a crane.
The material taking platform constructed on the cofferdam back slope is a selection which is relatively adaptive to the environment, and the prior art generally has two modes. Firstly, a material taking platform is excavated at a proper position of a cofferdam back slope, and the following defects exist: after the cofferdam is subjected to back slope digging, the slope of the material taking platform is steeper than that of the original cofferdam, so that the overall stability of the cofferdam is not good; if the material taking platform side slope is subjected to rigid protection, the cost investment is large. The second mode is that a bearing material taking platform is erected on the cofferdam back slope by adopting a steel truss, and the following defects exist: the cofferdam is built on the original riverbed foundation, the cofferdam foundation belongs to a riverbed covering layer, at the moment, the steel truss bearing and taking platform falls on the back slope of the cofferdam, the upright column foundation of the steel truss needs to be dug deeply to bedrock, and after the upright columns are installed and fixed, the dug part is filled to the original shape by using the filling material, so that the construction is inconvenient; the construction progress of the steel truss bearing material taking platform is slow; the steel truss bearing material taking platform has limited work amount of materials which can be borne, and is not beneficial to large-scale material discharging and taking.
Disclosure of Invention
The utility model discloses a cofferdam back slope tower machine gets material platform structure according to prior art's not enough. The to-be-solved problem of the utility model is to provide a cofferdam back slope tower machine gets material platform structure standardized, can repeat, build efficient, adaptability is better.
The utility model provides a following technical scheme realizes:
cofferdam back slope tower crane material taking platform structure, the cofferdam back slope ratio is 1: 1.5 ~ 2.5, its characterized in that: a retaining wall with a slope ratio of 1: 0.5-0.7 is arranged at the bottom of a cofferdam back slope, the retaining wall is arranged into a closed structure with one, two or three surfaces according to the cofferdam back slope structure, stone slag is backfilled in the retaining wall, and top concrete is poured to form a material taking platform with a planar structure; the retaining wall is formed by orderly misplacing and horizontally stacking reinforcing steel bar gabions of a cubic structure, stone materials larger than gabion grids are filled in each reinforcing steel bar gabion, the retaining wall thickness at least comprises two reinforcing steel bar gabions horizontally connected in a transverse mode, and foundation insertion ribs which penetrate downwards into cofferdam back slope bedrock and are not smaller than 3m are welded on each reinforcing steel bar gabion of the first layer at the bottom of the retaining wall.
Each reinforcement gabion is connected with the adjacent reinforcement gabion on the same layer in a welding mode through at least one horizontally arranged horizontal tie bar, and the end, extending into the retaining wall, of each horizontal tie bar, filled with stone ballast is of an elbow structure.
And the outer side faces of the first layer of steel reinforcement gabions at the bottom of the retaining wall are welded with the deformed steel bars uniformly spaced at the upper, middle and lower parts to fixedly connect all the first layer of steel reinforcement gabions in a transverse mode.
The reinforcing bar gabion is the structure of no top cap, and the skeleton reinforcing bar that constitutes by sideline owner muscle and the strengthening rib of interval setting and the distribution muscle welding that forms the net constitute, the length of reinforcing bar gabion is multiplied by the width and is all less than or equal to 2m 1m by high.
One end of the material taking platform is connected with the transportation road. And the edge of the material taking platform is welded with a guardrail.
The utility model discloses a steel reinforcement gabion forms the barricade structure at cofferdam back slope, and the comprehensive slope ratio of steel reinforcement gabion barricade is steerable at 1:0.5 ~ 0.7, utilizes steel reinforcement gabion barricade and former cofferdam back slope, and the slope ratio is 1: the slope ratio difference between the slope surface lines of 1.5-2.5 forms a certain effective space, the space is filled by adopting ballast backfill, and the top surface concrete is poured to form a material taking platform.
The utility model solves the problem that the tower crane material taking platform can not be normally arranged between the dam and the cofferdam due to limited space and narrow field; the construction speed of the material taking platform structure is high, the reinforcement gabion framework can be manufactured in advance in a processing plant, and the material taking platform with the height of about 20m can be implemented within 2 months; the material taking platform is implemented by pressing on the back slope of the cofferdam, so that the overall stability of the cofferdam is enhanced. The whole material taking platform is of a solid structure, so that the problem of insufficient bearing capacity is solved, and large-scale material discharging and taking can be carried out; the raw materials of the material taking platform are common, and the cost is low.
Drawings
Fig. 1 is a schematic sectional view of a material taking platform according to the present invention;
FIG. 2 is a schematic view of a retaining wall on one side of the material taking platform according to the present invention;
fig. 3 is a schematic view of the reinforcement gabion of the present invention;
fig. 4 is a schematic layout diagram of an embodiment of the present invention.
In the figure, 1 is a material taking platform, 2 is a guardrail, 3 is a cofferdam back slope, 4 is a reinforcement gabion, 41 is a framework reinforcement, 42 is a distribution reinforcement, 5 sidewalks, 6 is a foundation dowel, 7 is rock ballast, 8 is a horizontal tie bar, 9 is a tower crane, 10 is a transportation road, C is a dam, and D is a water collecting pit.
Detailed Description
The present invention is further described below in conjunction with the following detailed description, which is intended to further illustrate the principles of the invention and is not intended to limit the invention in any way, but is equivalent or analogous to the present invention without departing from its scope.
With reference to the attached drawings.
Cofferdam back slope tower crane material taking platform structure, the cofferdam back slope has 3 slope ratios of 1: 1.5-2.5, arranging a retaining wall with a slope ratio of 1: 0.5-0.7 from the bottom of a cofferdam back slope 3, wherein the retaining wall is arranged into a closed structure formed by one surface, two surfaces or three surfaces according to the structure of the cofferdam back slope 3, backfilling stone slag 7 in the retaining wall, and pouring top concrete to form a material taking platform 1 with a plane structure; the retaining wall is formed by orderly misplacing and horizontally stacking reinforcing steel bar gabions 4 of a cubic structure, stones larger than gabion grids are filled in each reinforcing steel bar gabion 4, the thickness of the retaining wall at least comprises two reinforcing steel bar gabions 4 which are horizontally and horizontally connected, and foundation insertion ribs 6 which are downward deep into cofferdam back slope 3 bedrocks and are not smaller than 3m are welded on each reinforcing steel bar gabion 4 on in the first layer at the bottom of the retaining wall.
Each reinforcement gabion 4 is connected with the adjacent reinforcement gabions 4 on the same layer in a welding mode through at least one horizontally arranged horizontal tie bar 8, and the end, extending into the retaining wall, of each horizontal tie bar 8, filled with the stone ballast 7 is of an elbow structure.
And the outer side surfaces of the first layer of steel reinforcement gabions 4 at the bottom of the retaining wall are welded with deformed steel bars uniformly spaced from the upper part to the middle part and from the lower part to fix all the first layer of steel reinforcement gabions 4 in a transverse connection mode.
And each reinforcement gabion of the adjacent layer are fixedly connected by welding through a vertically arranged foundation dowel.
The reinforcement gabion 4 is of a structure without a top cover, and is formed by welding framework reinforcements 41 consisting of side line main reinforcements and reinforcing ribs arranged at intervals and distribution reinforcements 42 forming grids, and the length, the width and the height of the reinforcement gabion are less than or equal to 2m, the x 1m and the x 1 m.
One end of the material taking platform 1 is connected with the transportation road 10. The guardrail 2 is welded at the edge of the material taking platform 1.
Taking a certain project as an example, the space between the hydropower station dam and the upstream cofferdam is limited, and a tower crane material taking platform is formed by adopting a steel bar gabion retaining wall and ballast backfilling, the platform height is 19m, and the top area is 580m2The problem of material taking of the tower crane is solved, and the upstream cofferdam is also reinforced in a turning mode. The whole platform is completely formed after the reinforcement gabion framework is manufactured, and the service life is 55 days.
The implementation scheme and steps are as follows:
(1) manufacturing a reinforcement gabion 4 framework structure in a comprehensive processing plant, wherein the size of a single reinforcement gabion 4 can be 2m multiplied by 1m (length multiplied by width multiplied by height), a main rib and a middle reinforcing rib of a 41 side line of the framework are made of phi 20 deformed steel, and the distance between the middle reinforcing ribs is 50 cm; the framework distribution ribs 42 are made of phi 12 deformed steel bars, and the distance between the distribution ribs 42 is 15-20 cm; the distribution ribs 42, the main ribs of the framework 41 and the middle reinforcing ribs are welded or bound firmly. The single reinforcement gabion 4 framework is of a roof-free structure, as shown in figure 3.
(2) And comprehensively determining the bottom elevation, the top elevation and the plane range of the retaining wall of the steel reinforcement gabion 4 according to the size of the area required by the material taking platform 1, the coverage range of the suspension arm of the tower crane 9 and the road on which the cofferdam back slope 3 is arranged.
(3) And (3) excavating and leveling a first layer of reinforcement gabion 4 retaining wall foundation on the cofferdam back slope 3, wherein the structural size of the retaining wall in the main stress direction is generally not less than 4m and is determined by calculating the height of the retaining wall.
(4) And constructing retaining wall foundation dowel bars 6, wherein the foundation dowel bars 6 are made of phi 28 deformed steel bars, the rock penetration depth is 3m, the exposed depth is 1m, and the foundation dowel bars are inserted into the reinforced gabion 4. Every reinforcing bar gabion 4 equips a foundation joint bar 6, and foundation joint bar 6 is located reinforcing bar gabion 4 centre of gravity position.
(5) After the reinforcing steel bar gabion 4 is placed by a manual cooperation crane, a backhoe is adopted to dig and load block stones prepared in advance at the side positions, the grain sizes of the block stones are larger than the spacing of the distribution ribs 42 grids, the reinforcing steel bar gabion 4 is loaded, and after the block stones are loaded, the top of the reinforcing steel bar gabion 4 is flattened by the backhoe.
(6) The whole retaining wall of the first layer of the steel bar gabion 4 is close to the outer side, all the steel bar gabions 4 are connected into a whole by using the phi 32 deformed steel bar welding with the through length, the phi 32 deformed steel bar is provided with 3 layers, and the upper elevation, the middle elevation and the lower elevation are uniformly distributed.
(7) After the construction of the whole first layer of the steel reinforcement gabion 4 retaining wall is finished, the space between the steel reinforcement gabion 4 retaining wall and the back slope surface of the original cofferdam is backfilled by adopting ballast 7, and the backfilled ballast 7 is compacted by a backhoe or other machines.
(8) And constructing a second layer of reinforcement gabion 4 retaining wall, controlling the comprehensive slope ratio of the outer side of the retaining wall to be 1: 0.5-1: 0.7, and welding the retaining wall and the framework of the first layer of reinforcement gabion 4 by adopting phi 32 deformed steel. In the main stress direction of the retaining wall, each steel bar gabion 4 is provided with a phi 16 round steel horizontal tie bar 8, the horizontal tie bar 8 is provided with an elbow, is firmly welded with the framework of the steel bar gabion 4 and extends into backfilled ballast 7, and the total length of a single horizontal tie bar 8 is not less than 6 m.
(8) And (5) repeating the steps (5), (6) and (7) to finish the second-layer platform. When the reinforcement gabions 4 on the second layer and above are stacked, the reinforcement gabions 4 on the same layer and adjacent layers are stacked in a staggered manner to form an orderly staggered and horizontally stacked structure.
(9) And (4) according to the construction steps of the platform at the second layer, sequentially constructing the platforms at the above layers until the reinforcing steel bar gabion 4 retaining wall and the platform with the inner side backfilled with ballast 7 are formed.
(10) And pouring a floor concrete surface layer of the material taking platform 1, wherein the thickness of the surface concrete is 30 cm. The top elevation of the material taking platform 1 is in direct connection with the road surface of the cofferdam back slope 3 transportation road 10. A slope of 0.3% is formed in the outward direction of the surface layer of the material taking platform 1, so that surface drainage is facilitated; a cutting and drainage ditch is formed near the mountain side.
(11) Safety guard rails 2 are arranged on the periphery of the material taking platform 1, the height of each guard rail is 1.1m, and the height of each guard rail is 48 mm.
And finishing the construction of the whole cofferdam back slope reclaiming platform 1.
Claims (7)
1. A material taking platform structure of a cofferdam back slope tower crane is characterized in that the cofferdam back slope ratio is 1: 1.5 ~ 2.5, its characterized in that: a retaining wall with a slope ratio of 1: 0.5-0.7 is arranged at the bottom of a cofferdam back slope, the retaining wall is arranged into a closed structure with one, two or three surfaces according to the cofferdam back slope structure, stone slag is backfilled in the retaining wall, and top concrete is poured to form a material taking platform with a planar structure; the retaining wall is formed by orderly misplacing and horizontally stacking reinforcing steel bar gabions of a cubic structure, stone materials larger than gabion grids are filled in each reinforcing steel bar gabion, the retaining wall thickness at least comprises two reinforcing steel bar gabions horizontally connected in a transverse mode, and foundation insertion ribs which penetrate downwards into cofferdam back slope bedrock and are not smaller than 3m are welded on each reinforcing steel bar gabion of the first layer at the bottom of the retaining wall.
2. The cofferdam back slope tower crane reclaiming platform structure as in claim 1, which is characterized in that: each reinforcement gabion is connected with the adjacent reinforcement gabion on the same layer in a welding mode through at least one horizontally arranged horizontal tie bar, and the end, extending into the retaining wall, of each horizontal tie bar, filled with stone ballast is of an elbow structure.
3. The cofferdam back slope tower crane reclaiming platform structure as in claim 1, which is characterized in that: and the outer side faces of the first layer of steel reinforcement gabions at the bottom of the retaining wall are welded with the deformed steel bars uniformly spaced at the upper, middle and lower parts to fixedly connect all the first layer of steel reinforcement gabions in a transverse mode.
4. The cofferdam back slope tower crane reclaiming platform structure as in claim 1, which is characterized in that: and each reinforcement gabion of the adjacent layer are fixedly connected by welding through a vertically arranged foundation dowel.
5. The cofferdam back slope tower crane reclaiming platform structure as in claim 1, which is characterized in that: the reinforcing bar gabion is the structure of no top cap, and the skeleton reinforcing bar that constitutes by sideline owner muscle and the strengthening rib of interval setting and the distribution muscle welding that forms the net constitute, the length of reinforcing bar gabion is multiplied by the width and is all less than or equal to 2m 1m by high.
6. The cofferdam back slope tower crane reclaiming platform structure as in claim 1, which is characterized in that: one end of the material taking platform is connected with the transportation road.
7. The cofferdam back slope tower crane reclaiming platform structure as in claim 1, which is characterized in that: and the edge of the material taking platform is welded with a guardrail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020755568.5U CN212561531U (en) | 2020-05-09 | 2020-05-09 | Material taking platform structure of cofferdam back slope tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020755568.5U CN212561531U (en) | 2020-05-09 | 2020-05-09 | Material taking platform structure of cofferdam back slope tower crane |
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| CN212561531U true CN212561531U (en) | 2021-02-19 |
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| CN202020755568.5U Active CN212561531U (en) | 2020-05-09 | 2020-05-09 | Material taking platform structure of cofferdam back slope tower crane |
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