CN214940282U - Hanging box cofferdam structure with back ribs - Google Patents
Hanging box cofferdam structure with back ribs Download PDFInfo
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- CN214940282U CN214940282U CN202023170362.5U CN202023170362U CN214940282U CN 214940282 U CN214940282 U CN 214940282U CN 202023170362 U CN202023170362 U CN 202023170362U CN 214940282 U CN214940282 U CN 214940282U
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Abstract
The utility model discloses a hanging box cofferdam structure with back ribs, which comprises a cofferdam side plate, wherein the hanging box cofferdam is arranged perpendicular to a bottom plate and is enclosed with the bottom plate, the outer side surface of the cofferdam side plate is provided with transverse ribs and vertical ribs, the transverse ribs are arranged along the horizontal direction, and the vertical ribs are arranged perpendicular to the transverse ribs; a plurality of back ribs disposed on an outer side surface of the vertical rib, the back ribs being disposed parallel to the cross ribs. The utility model discloses, the back of the body rib setting is on the lateral surface of erecting the rib to with cross rib parallel arrangement, play stiffening effect to the hanging box cofferdam through the back of the body rib, thereby reduce the stress size of the vertical rib in the cofferdam outside and cross rib, reduce the hoop deformation of cofferdam curb plate. The back rib is arranged on the outer side of the hanging box cofferdam, the inner space of the hanging box cofferdam is avoided being occupied, the inner supporting space does not need to be reserved in the sleeve box, the design size of the sleeve box is reduced, the cofferdam cost is reduced, the construction steps of the bearing platform are simplified, the construction efficiency of the bearing platform is greatly improved, and the construction period length is shortened.
Description
Technical Field
The utility model relates to a hanging box cofferdam technical field, concretely relates to hanging box cofferdam back of body rib.
Background
The cofferdam is used as a temporary facility for bridge foundation construction, and is mainly used as an underwater foundation construction water-resisting device or a deep foundation pit excavation protection support, so that a bearing platform is installed in place under the anhydrous and safe conditions, and subsequent reinforcement, concrete pouring and construction of reserved holes are performed. At present, in the foundation construction of underwater bridges and wharfs, cofferdams adopted are approximately as follows: the cofferdam comprises a steel sheet pile cofferdam, a locking steel pipe pile cofferdam, a double-wall steel cofferdam, a reinforced concrete cofferdam, a bottomless steel pouring jacket, a bottom-closed steel hanging box cofferdam and the like. The steel suspension box cofferdam has the characteristics of short construction period, no need of sinking into a riverbed, small material consumption, economy, reasonableness and the like, and is widely applied to the foundation construction of high-rise pile cap of bridges and wharfs.
The steel suspension box cofferdam generally surrounds water through a suspension box cofferdam side plate, a steel bottom plate and back cover concrete, and provides an anhydrous dry environment for the construction of a bearing platform. The hanging box comprises a double-wall hanging box and a single-wall hanging box, wherein the double-wall hanging box is generally composed of an inner wall, an outer wall and a web plate or other connecting components arranged between the inner wall and the outer wall, and has the defects of complex structure, large welding amount, slow construction and the like.
Therefore, the steel pipe hanging box cofferdam device provided by the Chinese utility model patent CN210086271U comprises side maintenance, bottom maintenance and internal support; the side maintenance is a closed structure surrounded by a plurality of vertically arranged support steel pipes, adjacent support steel pipes are connected by welding through connecting steel plates, and the bottom of each support steel pipe and the bottom of each connecting steel plate are welded on the bottom maintenance; the internal support supports are laterally maintained inside, and the internal support is in spot welding connection with each support steel pipe. The utility model discloses a solved conventional hanging box cofferdam structure complicacy to a certain extent, the volume of welding is big, the construction is slow, with the problem that the steel volume is big, the expense is high, recycle is low. The steel pipe intensity is big, compares in the double-walled steel cofferdam of the same degree of depth, and this utility model steel pipe hanging box cofferdam simple structure, preparation simple to operate, construction are fast, moreover with material province, with low costs.
However, the steel pipe hanging box cofferdam device has the following defects:
(1) the inner supports comprise a plurality of layers of annular supports matched with the inner shape of the side maintenance, the supports are arranged inside the cofferdam and encroach on the space inside the cofferdam, and for the construction of bearing platforms with the same size, the size of the cofferdam needs to be designed to be larger and more steel is consumed due to the fact that the space of the inner supports needs to be reserved;
(2) the inner support structure invades into the space range of the bearing platform column body, and can obstruct the pouring of the bearing platform. For a cofferdam structure with an internal support, the current construction method is that after a bottom bearing platform is poured, a brace rod is arranged between the bottom bearing platform and a cofferdam wallboard, small water head difference inside and outside the cofferdam is filled with water, the internal support above the bearing platform is gradually cut off, and the pouring of an upper bearing platform is completed. Based on the defects, the construction steps of the bearing platform are complicated, multiple system conversion exists, the construction efficiency is low, and the construction period is long.
In view of this, it is urgently needed to improve the existing cofferdam structure of the hanging box so as to avoid encroaching on the internal space of the cofferdam, simplify the construction steps of the bearing platform, reduce the construction cost and improve the construction efficiency.
SUMMERY OF THE UTILITY MODEL
To the above defect, the utility model aims to solve the technical problem that a hanging box cofferdam structure is provided to the cofferdam inner space is invaded to the inside support of solving current hanging box cofferdam, leads to the problem that cushion cap efficiency of construction, construction step are complicated, construction cost is high.
Therefore, the utility model provides a pair of hanging box cofferdam structure of area back of body rib, include:
the cofferdam side plate is perpendicular to the bottom plate, the cofferdam side plate and the bottom plate are enclosed to form a hanging box cofferdam, the outer side surface of the cofferdam side plate is provided with a transverse rib and a vertical rib, the transverse rib is arranged along the horizontal direction, and the vertical rib is perpendicular to the transverse rib;
the multi-layer back ribs are I-shaped steel arranged in parallel, and the back ribs are arranged on the vertical ribs and are parallel to the transverse ribs.
In the above technical solution, preferably, the back rib includes:
the first flange plate is arranged on the outer side face of the vertical rib, and the inner side face of the first flange plate is welded and fixed with the outer side face of the vertical rib;
and the second flange plate is arranged in parallel to the first flange plate and is arranged on the outer side surface of the first flange plate through a web plate.
In the above technical solution, preferably, the back rib is further provided with:
the stiffening plate comprises an upper stiffening plate and a lower stiffening plate which are respectively arranged on the top surface and the bottom surface of the web plate, the outer side surface of the stiffening plate is welded and fixed with the inner side surface of the second flange plate, and the inner side surface of the stiffening plate is welded and fixed with the outer side surface of the vertical rib.
In the above technical solution, preferably, the stiffening plate is further provided with an end plate, the end plate is disposed on the top surface of the upper stiffening plate and the bottom surface of the lower stiffening plate, and the end plate is welded and fixed to the vertical rib.
In the above technical solution, preferably, the upper stiffening plate, the lower stiffening plate and the end plate are a plurality of plates arranged at equal intervals.
In the above technical solution, preferably, for the back ribs on the same layer disposed on the cofferdam side plates on different sides, two ends of the back rib are connected with each other, a closed ring structure is formed by welding at the interface of the back rib, and the interface of the back rib adopts groove welding.
In the above technical solution, preferably, the specifications of the i-steel of the multiple layers of the back ribs are sequentially improved from top to bottom.
In the above technical solution, preferably, on the cofferdam side panels on the same side, the distance between two adjacent vertical ribs is 1.6m, and the distance between two adjacent layers of transverse ribs is 1.5 m.
In the above technical scheme, preferably, the bottom plate is provided with a hole adapted to the pile foundation, and the upper end of the pile foundation penetrates through the hole and is arranged at the bottom of the hanging box cofferdam.
In the above technical solution, preferably, the back rib is disposed outside the cross rib, and a height of the back rib is the same as a height of the cross rib.
According to the above technical scheme, the utility model provides a hanging box cofferdam structure of area back of body rib for water proof or deep basal pit's among the bridge foundation construction excavation protection is kept off, so that construction such as cushion cap installation takes one's place is carried out to the foundation construction under anhydrous, the safe condition in the water. Compared with the prior art, the utility model discloses following beneficial effect has:
firstly, the back ribs are arranged on the outer side surfaces of the vertical ribs and are arranged in parallel with the transverse ribs, and the suspension box cofferdam is stiffened through the back ribs, so that the stress of the vertical ribs and the transverse ribs on the outer side of the cofferdam is reduced, and the circumferential deformation of the side plates of the cofferdam is reduced; the back rib is arranged on the outer side of the hanging box cofferdam, the inner space of the hanging box cofferdam is avoided being occupied, the inner supporting space does not need to be reserved in the sleeve box, the design size of the sleeve box is reduced, the cofferdam cost is reduced, the construction steps of the bearing platform are simplified, the construction efficiency of the bearing platform is greatly improved, and the construction period length is shortened.
Secondly, the back rib is further provided with stiffening plates, the upper stiffening plate and the lower stiffening plate are respectively arranged on the top surface and the bottom surface of the web plate, the outer side surfaces of the stiffening plates and the inner side surface of the second flange plate are welded and fixed, and the inner side surfaces of the stiffening plates and the vertical ribs are welded and fixed, so that the stiffening strength of the back rib is improved, the back rib can bear larger stress, and the structural stability of the cofferdam structure of the hanging box is improved.
And thirdly, for the same-layer back ribs arranged on the cofferdam side plates on different sides, the two ends of the back ribs are mutually connected, and the joints of the back ribs are welded to form a closed annular structure, which is equivalent to that a plurality of hoops are additionally arranged on the outer wall of the cofferdam side plate of the hanging box cofferdam, so that the stability of the structure of the cofferdam side plate is further improved, and the annular deformation of the cofferdam side plate is prevented.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments of the present invention or the technical solutions in the prior art will be briefly described and explained below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a sectional view of a cofferdam structure with a hanging box with back ribs;
FIG. 2 is a side view of a middle back rib of the present invention;
fig. 3 is a top view of the middle back rib of the present invention;
fig. 4 is a schematic cross-sectional view taken at 1-1 in fig. 1.
In fig. 1 to 4, the correspondence of the components is as follows:
the cofferdam comprises cofferdam side plates 1, a bottom plate 2, transverse ribs 3, vertical ribs 4, back ribs 5, pile foundations 6, a bearing platform 7 and bottom sealing concrete 8;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses an implementation principle is:
the corresponding height of the transverse rib on the outer side of the cofferdam side plate of the hanging box cofferdam is tightly attached to the vertical rib of the cofferdam and welded with a circle of I-shaped steel as the back rib, so that the corresponding position of the vertical rib is transversely strengthened, the whole stress of the back rib and the cofferdam side plate is ensured, and the deformation of the back plate is avoided. After the suspension box cofferdam is stiffened by the back rib, the stress of the vertical rib and the transverse rib of the cofferdam is correspondingly reduced, the annular deformation of the side plate of the cofferdam is reduced, and the requirement of the construction working condition in the cofferdam is met.
The utility model provides a scheme can accomplish the hoop support to the hanging box cofferdam, avoids the hanging box cofferdam to take place annular deformation to the messenger provides anhydrous dry environment for each item construction in the cofferdam, goes on smoothly with guaranteeing each item work progress.
Specifically, the utility model provides a hanging box cofferdam structure of area back of body rib, include:
the cofferdam side plate is perpendicular to the bottom plate, the cofferdam side plate and the bottom plate are enclosed to form a hanging box cofferdam, the outer side surface of the cofferdam side plate is provided with a transverse rib and a vertical rib, the transverse rib is arranged along the horizontal direction, and the vertical rib is perpendicular to the transverse rib;
a plurality of back ribs disposed on the vertical ribs, the back ribs being disposed parallel to the cross ribs.
In order to explain and explain the technical solution and implementation of the present invention more clearly, several preferred embodiments for implementing the technical solution of the present invention are introduced below.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In addition, the terms herein: the references to "inner, outer", "front, rear", "left, right", "vertical, horizontal", "top, bottom", etc. are made based on the orientation or positional relationship shown in the drawings and are intended only to facilitate the description of the application and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore should not be construed as limiting the application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Example 1.
Referring to fig. 1, fig. 1 is a cross-sectional view of a cofferdam structure with back ribs for a suspension box of this embodiment.
As shown in figure 1, the utility model provides a hanging box cofferdam structure of area back of body rib includes cofferdam curb plate 1 and bottom plate 2, and cofferdam curb plate 1 perpendicular to bottom plate 2 sets up, and cofferdam curb plate 1 encloses into hanging box cofferdam with bottom plate 2. The bottom plate 2 is provided with a hole matched with the pile foundation, and the upper end of the pile foundation penetrates out of the hole and is arranged at the bottom of the hanging box cofferdam.
And the outer side surface of the cofferdam side plate 1 is provided with a transverse rib 3 and a vertical rib 4, the transverse rib 3 is arranged along the horizontal direction, and the vertical rib 4 is perpendicular to the transverse rib 3. The transverse ribs 3 and the vertical ribs 4 are arranged on the outer side of the cofferdam side plate 1 and play a role in bearing the stress generated by the water head in the cofferdam of the hanging box. The bottom plate 2 is provided with a hole matched with the pile foundation, and the upper end of the pile foundation penetrates out of the hole and is arranged at the bottom of the hanging box cofferdam.
The multi-layer back ribs 5 are I-shaped steel arranged in parallel, are arranged on the vertical ribs 4 and are parallel to the transverse ribs 3. The multilayer back ribs 5 share the stress of the transverse ribs 3 and the vertical ribs 4 on the cofferdam side plate 1, and the strength and the bearing capacity of the cofferdam side plate 1 are improved. The back rib 5 is arranged on the outer side of the cofferdam side plate 1, so that the inner space of the cofferdam is not occupied, and the construction of a bearing platform is not influenced.
Because the back rib is always arranged on the outer end face of the cofferdam side plate, the space in the hanging box cofferdam cannot be occupied, and when the processes of building a bearing platform, pouring concrete and the like are performed, the space occupied by construction engineering only needs to be considered, the overturning and other parameters of the hanging box cofferdam are met, the design size of the cofferdam is reduced, the efficiency of the hanging box cofferdam is improved, and the cost of the cofferdam is reduced.
Example 2.
The embodiment 2 is a further optimization and improvement of the back rib on the basis of the embodiment 1.
Referring to fig. 2 and 3, fig. 2 is a side view of the back rib of the present embodiment, and fig. 3 is a top view of the back rib of the present embodiment.
The back rib 5 includes a first flange plate 51, a second flange plate 52, and a web 53. The first flange plate 51 is provided on the outer side surface of the vertical rib 4, and the inner side surface of the first flange plate 51 is welded and fixed to the outer side surface of the vertical rib 4. The second flange plate 52 is provided on the first flange plate 51 through a web 53, and the second flange plate 52 is parallel to the first flange plate 51.
Each layer of back rib 5 is further provided with a stiffening plate 54 and an end plate 55, the stiffening plate 54 comprises an upper stiffening plate and a lower stiffening plate, the upper stiffening plate and the lower stiffening plate are respectively arranged on the top surface and the bottom surface of the web plate 53, the outer side surface of the stiffening plate 54 is welded and fixed with the inner side surface of the second flange plate 52, and the inner side surface of the stiffening plate 54 is welded and fixed with the outer side surface of the vertical rib 4.
The end plates 55 are arranged on the top surfaces of the upper stiffening plates and the bottom surfaces of the lower stiffening plates, and the inner end surfaces of the end plates 55 are welded and fixed with the vertical ribs 4. The upper and lower stiffener plates and the end plate 55 are all provided at equal intervals.
The stiffening plates 54 and the end plates 55 improve the connection strength of the back ribs 5 and the vertical ribs 4, and the stiffening plates 54 and the end plates 55 are arranged at equal intervals to ensure that the back ribs 5 are stressed uniformly, reduce the consumption of steel and save the cost.
For the same-layer back ribs 5 arranged on the cofferdam side plates 1 on different sides, the two ends of the back ribs 5 are mutually connected, and the joints of the back ribs are welded to form a closed annular structure, which is equivalent to that a plurality of anchor ears are added on the outer wall of the cofferdam side plate of the hanging box cofferdam, thereby further improving the water head stress bearing capacity of the cofferdam side plate and the integral overturning resistance capacity of the hanging box cofferdam. The interfaces of the back ribs 5 are welded by grooves, so that the connection strength of the interfaces of the back ribs is improved.
Example 3.
Referring to fig. 4, fig. 4 is a schematic construction plan view, i.e., a schematic cross-sectional view at 1-1 in fig. 1, according to this embodiment.
The bottom plate 2 is provided with a hole matched with the pile foundation 6, and the upper end of the pile foundation 6 penetrates out of the hole to be arranged at the bottom of the hanging box cofferdam. In this embodiment, the pile foundation 6 is an electric tower foundation, the foundation is in the form of an individual pile with a diameter of 3m, the cofferdam bottom sealing concrete 8 is 1.5m thick, the bearing platform 7 is a high pile bearing platform, the specification of the bearing platform 7 is 8.4m long and 7.2m wide, the elevation of the cofferdam bottom is-2.0 m, the elevation of the cofferdam top is +6.5m, the construction high water level is +6.0m, and the design flow rate is 2.0 m/s.
The cofferdam side plate 1 and the back rib 5 are made of Q235 steel, the distance between vertical ribs on the cofferdam side plate is 1.6m, and the distance between transverse ribs on the cofferdam side plate is 1.5 m. The back ribs are welded on the outer sides of the vertical ribs, wherein the elevation of the back rib at the bottom layer is +3.0m, HN 900X 300I-steel is adopted, the elevation of the back rib at the top layer is +6.0m, and HN 800X 300I-steel is adopted.
The utility model discloses a use method as follows:
firstly, the integral welding of the back rib 5 is carried out in a factory, the back rib 5, the transverse ribs 3, the vertical ribs 4 and the cofferdam side plate 1 are welded into a whole, then the cofferdam side plate 1 and the bottom plate 2 are transported to the site, the bottom plate 2 and the cofferdam side plate 1 are installed and welded, the same-layer back ribs 5 on different sides are welded into a closed annular structure, and the specification of the I-steel adopted by the back rib 5 is improved from bottom to top according to the different cofferdam scales and water levels. After the welding of the suspension box cofferdam is finished, bottom sealing concrete pouring and bearing platform pouring construction can be carried out on the cofferdam, the bearing platform 7 can be poured for three times, in the pouring process of the bearing platform 7, the back ribs 5, the transverse ribs 3 and the vertical ribs 4 bear force, the back ribs 5 do not need to be dismantled and cut, and the construction of the bearing platform cannot be interfered.
Synthesize the description of above concrete embodiment, summarize the utility model discloses an advantage lies in:
1. the outer side of the cofferdam side plate is welded with the back rib for stiffening, so that the stress and deformation conditions of the cofferdam side plate are improved;
2. the back rib is integrally positioned outside the cofferdam, so that the internal space of the cofferdam is not occupied, the overall design size of the cofferdam can be reduced to a certain extent, and steel is saved;
3. the back rib is integrally positioned outside the cofferdam, so that the pouring process of a bearing platform inside the cofferdam is not interfered, the construction flow is simplified, and the construction speed is improved;
4. the back rib structure can be integrally processed with the cofferdam side plate in a factory, an inner support structure does not need to be welded in a construction site, and the construction speed is accelerated.
Finally, it should be noted that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can implement, so that the present application has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present application without affecting the efficacy and the achievable purpose of the present application.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The present invention is not limited to the above-mentioned best mode, and any person should learn the structural change made under the teaching of the present invention, all with the present invention has the same or similar technical solution, all fall into the protection scope of the present invention.
Claims (10)
1. The utility model provides a hanging box cofferdam structure of area back of body rib which characterized in that includes:
the cofferdam side plate is perpendicular to the bottom plate, the cofferdam side plate and the bottom plate are enclosed to form a hanging box cofferdam, the outer side surface of the cofferdam side plate is provided with a transverse rib and a vertical rib, the transverse rib is arranged along the horizontal direction, and the vertical rib is perpendicular to the transverse rib;
the multi-layer back ribs are I-shaped steel arranged in parallel, and the back ribs are arranged on the vertical ribs and are parallel to the transverse ribs.
2. The cofferdam structure of a hanging box with a back rib of claim 1, wherein said back rib comprises:
the first flange plate is arranged on the outer side face of the vertical rib, and the inner side face of the first flange plate is welded and fixed with the outer side face of the vertical rib;
and the second flange plate is arranged in parallel to the first flange plate and is arranged on the outer side surface of the first flange plate through a web plate.
3. The cofferdam structure of a hanging box with back ribs as claimed in claim 2, wherein each layer of said back ribs is further provided with:
the stiffening plate comprises an upper stiffening plate and a lower stiffening plate which are respectively arranged on the top surface and the bottom surface of the web plate, the outer side surface of the stiffening plate is welded and fixed with the inner side surface of the second flange plate, and the inner side surface of the stiffening plate is welded and fixed with the outer side surface of the vertical rib.
4. The cofferdam structure of a hanging box with back ribs as claimed in claim 3, wherein the stiffening plates are further provided with end plates, which are arranged on the top surface of the upper stiffening plate and the bottom surface of the lower stiffening plate, and the end plates are welded and fixed with the vertical ribs.
5. The cofferdam structure of a hanging box with back ribs as claimed in claim 4, wherein said upper stiffener, said lower stiffener and said end plate are plural ones arranged at equal intervals.
6. The cofferdam structure with the back rib as recited in claim 1, wherein for the back rib of the same layer disposed on the cofferdam side plates of different sides, both ends of the back rib are connected with each other, the interface of the back rib is welded to form a closed ring structure, and the interface of the back rib is welded by a groove.
7. The cofferdam structure of a hanging box with a back rib as claimed in claim 1, wherein the specifications of the i-beams of the plurality of layers of the back rib are sequentially increased from top to bottom.
8. The cofferdam structure with back ribs of claim 1, wherein on the cofferdam side plate of the same side, the distance between two adjacent vertical ribs is 1.6m, and the distance between two adjacent layers of transverse ribs is 1.5 m.
9. The cofferdam structure of a hanging box with back ribs as claimed in claim 1, wherein the bottom plate is provided with holes adapted to the pile foundation, and the upper end of the pile foundation is arranged at the bottom of the cofferdam through the holes.
10. The cofferdam structure of a hanging box with a back rib as recited in claim 1, wherein said back rib is provided at the outside of said cross rib, and the height of said back rib is the same as the height of said cross rib.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023170362.5U CN214940282U (en) | 2020-12-24 | 2020-12-24 | Hanging box cofferdam structure with back ribs |
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| CN202023170362.5U CN214940282U (en) | 2020-12-24 | 2020-12-24 | Hanging box cofferdam structure with back ribs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125983A (en) * | 2022-08-08 | 2022-09-30 | 中国十九冶集团有限公司 | Bottomless steel sleeve box for bridge underwater bearing platform construction |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125983A (en) * | 2022-08-08 | 2022-09-30 | 中国十九冶集团有限公司 | Bottomless steel sleeve box for bridge underwater bearing platform construction |
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