CN212534232U - Protection device for construction of penetrating large-scale rigid box culvert under power pipe gallery - Google Patents
Protection device for construction of penetrating large-scale rigid box culvert under power pipe gallery Download PDFInfo
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- CN212534232U CN212534232U CN202020949986.8U CN202020949986U CN212534232U CN 212534232 U CN212534232 U CN 212534232U CN 202020949986 U CN202020949986 U CN 202020949986U CN 212534232 U CN212534232 U CN 212534232U
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Abstract
The utility model relates to a protection structure when wearing rigid box culvert down in the construction of electric power pipe gallery, especially a protection device is used in the construction of wearing large-scale rigid box culvert under electric power pipe gallery, its structural feature lies in, including supporting component, jacking subassembly and pipe shed subassembly, wherein: the supporting component comprises four steel pipe piles and supporting steel plates arranged on the top end face of each steel pipe pile; the jacking assembly comprises a jack with an axial force meter, a plurality of steel round pull rods and a bearing steel plate, wherein the jack is connected with the supporting steel plate through bolts, the steel round pull rods are positioned at the edges of the upper end surfaces of the supporting steel plates, and the bearing steel plate is arranged on the steel round pull rods; the pipe shed component comprises two groups of double-spliced I-shaped steel main beams and a plurality of steel floral tubes erected on the upper end surfaces of the two groups of steel main beams. The utility model effectively avoids the large-scale separation under the box culvert, reduces the disturbance to the box culvert foundation and ensures the backfill quality; the construction is convenient, the construction efficiency is effectively improved, the construction period is shortened, and the construction cost is reduced.
Description
Technical Field
The utility model relates to a protection structure when wearing rigid box culvert under in the construction of electric power piping lane, especially a protection device is used in the construction of wearing large-scale rigid box culvert under electric power piping lane.
Background
City electric power piping lane is underground works, and electric power piping lane often need wear large-scale rigid box culvert such as rainwater, sewage, electric power down in the work progress. At present, two methods are mainly adopted: firstly, temporarily changing a rigid box culvert, and recovering the box culvert after the construction of the power pipe gallery is finished; and secondly, the rigid pipe culvert is penetrated by adopting a pipe jacking machine in a jacking mode on the basis of not changing the rigid box culvert by adopting trenchless pipe jacking operation. However, the disadvantages of the above solutions are:
1) the temporary relocation of the large rigid box culvert needs complicated design and construction engineering, the construction period is long, and the influence on the social range of using the box culvert is large, so the practicability is not high;
2) the trenchless pipe jacking operation needs large-scale pipe jacking machinery, the preparation is more in the early and later periods of the project, the manufacturing cost is high, the construction period is long, and the pipe jacking machinery has certain requirements on the properties of underground soil rocks, for example, the pipe jacking machinery is difficult to process when meeting the conditions of boulders and the like.
The prior art has also adopted a protective structure for the suspension support: the soil body below the box culvert is manually cleaned firstly, then the box culvert is isolated and protected by the protective device suspended by the mounting supports, and then the backfill soil support is carried out after the construction of the power pipe gallery is completed. However, the disadvantage of this solution is that the rigid box culvert cannot be effectively protected: firstly, large-range void exists below the box culvert, and large disturbance is generated on the foundation of the box culvert, so that potential safety hazards exist in the rigid box culvert; secondly, the suspension steel bars do not apply prestress, so that the box culvert is greatly deformed and even cracks are caused when the soil body at the lower part of the box culvert is excavated; in addition, when soil bodies just below the large rigid box culvert are backfilled, tamping cannot be performed, the backfilling quality is difficult to guarantee, the large rigid box culvert is seriously settled at the later stage, and even the line operation is influenced.
Disclosure of Invention
An object of the utility model is to provide a can effectively protect the box culvert, reduce construction cost, shorten construction period's electric power piping lane wears large-scale rigidity box culvert protection device for construction according to prior art's weak point.
The purpose of the utility model is realized through the following ways:
protection device is used in construction of passing large-scale rigid box culvert under electric power piping lane, its structural feature lies in, including supporting component, jacking subassembly and pipe shed subassembly, wherein: the supporting component comprises four steel pipe piles and supporting steel plates arranged on the top end face of each steel pipe pile; the jacking assembly comprises a jack with an axial force meter, a plurality of steel round pull rods and a bearing steel plate, wherein the jack is positioned in the center of the upper end face of the supporting steel plate and is in bolted connection with the supporting steel plate, the steel round pull rods are positioned at the edge of the upper end face of the supporting steel plate and take the jack as a symmetric center, and the bearing steel plate is arranged on the steel round pull rods; the pipe shed component comprises two groups of double-spliced I-shaped steel main beams and a plurality of steel floral pipes which are distributed perpendicular to the steel main beams and erected on the upper end surfaces of the two groups of steel main beams; round holes are arranged on two sides of the bearing steel plate and penetrate through the round holes to be sleeved on the upper end part of the round pull rod.
When the protection device for construction is applied to the large rigid box culvert penetrating under the power pipe gallery, the steps are as follows:
1) respectively excavating a long and narrow foundation pit on two sides of the box culvert along the trend of the box culvert until the height difference between the bottom of the long and narrow foundation pit and the bottom of the box culvert is the sum of the heights of the pipe shed component and the jacking component; reserving soil bodies right below the box culvert, excavating power pipe gallery foundation pits on two sides of the box culvert along the direction perpendicular to the box culvert, and then grouting and reinforcing the soil bodies outside two sides of the power pipe gallery foundation pits and right below the box culvert;
2) supporting components are arranged at the two sides of the power pipe gallery foundation pit and at the outer edges of the two sides of the box culvert, four steel pipe piles are respectively arranged at four intersections of the two sides of the power pipe gallery foundation pit and the outer edges of the two sides of the box culvert, and supporting steel plates and the steel pipe piles are welded to form integral construction; the jacking assembly is arranged on a supporting steel plate, a jack and a round pull rod are respectively connected with the supporting steel plate through bolts, and round holes arranged on two sides of a bearing steel plate are sleeved on the upper end part of the round pull rod in a penetrating manner and are pressed on the top end part of the jack; the steel main beams in the pipe shed assembly are distributed in parallel to the box culvert, and two ends of each steel main beam are respectively welded with a bearing steel plate;
3) drilling a hole in the soil body right below the box culvert, wherein the drilling position is located between the bottom of the box culvert and the steel girder, the drilling direction is vertical to the box culvert and the steel girder, the hole diameter of the drilled hole is matched with the outer diameter of the steel perforated pipe and is matched with the height difference between the bottom of the box culvert and the steel girder, one steel perforated pipe is installed and inserted in time after each hole is drilled, and two end parts of the installed steel perforated pipe are located above the two groups of steel girders until all the steel perforated pipes are installed;
4) starting four jacks in the jacking assembly, jacking the whole pipe shed through a bearing steel plate until the axial force value displayed by an axial force meter reaches a preset value, then excavating a soil body right below the box culvert, and performing power pipe gallery construction; after the construction of the power pipe gallery is finished, backfilling foundation pits above the power pipe gallery and right below the box culvert until the position of a bottom plate of the box culvert, and injecting cement paste into the backfilled soil body through grouting holes in the steel flower pipes by using a grouting machine until the grouting pressure reaches a set value; and (4) evacuating the supporting component, the jacking component and the I-shaped steel main beam, backfilling the power pipe gallery foundation pit and the long and narrow foundation pits on the two sides of the box culvert, and recovering the site.
Among the protection device for the construction, the jacking subassembly is used for jacking pipe shed subassembly to provide vertical prestressing force, make the large-scale rigid box culvert of effective bearing of pipe shed subassembly, support the protection for large-scale rigid box culvert provides middle period. Therefore, except for the steel pipe, other components are positioned on the two outer sides of the large rigid box culvert, so that a lower space is provided for the box culvert, a soil body is reserved in the early stage of construction, the reserved soil body is guaranteed to be excavated after effective bearing, the large-scale emptying below the box culvert is effectively avoided, the disturbance to the box culvert foundation is reduced, and the backfilling quality is guaranteed; the construction is convenient, the construction efficiency is effectively improved, the construction period is shortened, and the construction cost is reduced.
The utility model discloses can further specifically do:
the supporting steel plate and the bearing steel plate are both square steel plates or round steel plates.
Wherein the bearing steel plate is preferably square steel plate, and its tip shape adaptation with the I-shaped steel girder in the pipe shed subassembly is convenient for connect.
The steel pipe pile, the supporting steel plate, the jack and the bearing steel plate are coaxially arranged, one end of a steel round pull rod is connected with the supporting steel plate through a bolt, the other end of the steel round pull rod is vertically upward, and the bearing steel plate is sleeved on the vertical upper end portion in a penetrating mode.
The jacking assembly arranged coaxially with the supporting assembly is convenient to operate, and vertical prestress is applied between the pipe shed assembly supporting the large rigid box culvert and the steel pipe pile through the jacking assembly.
The steel perforated pipe is a seamless steel pipe, and a plurality of grouting holes are distributed on the side wall of the steel perforated pipe at equal intervals.
When the steel perforated pipe is installed, the grouting holes face the side edge and the lower part, so that cement grouting is facilitated to improve the backfilling compactness of a foundation pit below the large-scale rigid box culvert.
To sum up, the utility model provides a wear large-scale rigidity box culvert protection device for construction under electric power piping lane has all effectively supported and protected large-scale rigidity box culvert at whole work progress, has avoided the more extensive sky in box culvert below, has reduced the disturbance to the box culvert ground, has ensured the backfill quality, and it is convenient to be under construction, effectively improves the efficiency of construction, shortens construction period, reduces construction cost.
Drawings
Fig. 1 is a schematic view of a vertical plane split structure of a protection device for construction of a large rigid box culvert penetrating under a power pipe gallery;
FIG. 2 is a schematic structural view of a support assembly in the protection device for construction according to the present invention;
fig. 3 is a schematic structural view of a jacking assembly in the protection device for construction according to the present invention;
fig. 4 is a schematic structural view of a pipe shed assembly in the protection device for construction according to the present invention;
fig. 5 is a schematic structural view of the protection device for constructing the large rigid box culvert under the power pipe gallery in the construction process;
the present invention will be further described with reference to the following examples.
Detailed Description
The best embodiment is as follows:
referring to the attached drawing 1, electric power pipe gallery wears large-scale rigidity box culvert protection device for construction down, including supporting component, jacking subassembly and pipe shed subassembly, wherein: with reference to the attached drawing 2, the supporting assembly comprises four steel pipe piles 1 and supporting steel plates 2 installed on the top end faces of the steel pipe piles 1, and the tops of the steel pipe piles 1 and the supporting steel plates 2 are welded to form a whole to serve as a jacking assembly foundation; the supporting steel plate 2 is a square steel plate, and a plurality of bolt holes matched with a base of the jack 3 with the axial force meter are reserved in the center of the supporting steel plate; a plurality of bolt holes (not shown in the figure) matched with the base of the steel round pull rod 4 are reserved on the edge of the supporting steel plate 2 close to the edge along an axis passing through the axis.
With reference to fig. 3, the jacking assembly comprises a jack 3 with an axial force meter, two steel round pull rods 4 and a bearing steel plate 5, wherein the jack 3 is positioned in the center of the upper end face of the supporting steel plate 2 and is in bolted connection with the supporting steel plate 2, the two steel round pull rods 4 are positioned at the edge of the upper end face of the supporting steel plate 2 and are symmetric about the jack 3, and the bearing steel plate 5 is arranged on the round pull rods 4; a jack 3 with an axial force meter is fixed at the central position of the supporting steel plate 2 through a bolt; two steel round pull rods 4 are fixed on two sides of the supporting steel plate 2 through bolts; the bearing steel plate 5 is a square steel plate, and two round holes matched with the steel round pull rods are reserved at the top seat; the steel pipe pile, the supporting steel plate, the jack and the bearing steel plate are coaxially arranged.
With reference to fig. 4, the pipe shed assembly comprises two groups of double-spliced I-shaped steel main beams 6 and a plurality of steel floral tubes 7 which are distributed perpendicular to the steel main beams 6 and erected on the upper end surfaces of the two groups of steel main beams 6; the steel perforated pipe 7 is formed by processing a seamless steel pipe, and a plurality of 15mm grouting holes are reserved on the side wall at equal intervals; two ends of the steel flower tube 7 are lapped above the double-spliced I-shaped steel main beam 6 to form a Chinese character 'jing' shaped tube shed structure together.
When protection device for construction is applied to and wears large-scale rigidity box culvert under electric power piping lane, refer to figure 5, the step is as follows:
1) constructing a foundation pit enclosure structure 10 for the power pipe gallery 9 which is perpendicular to the box culvert trend and outside the box culvert 8, wherein the construction comprises the opposite bracing installation of the enclosure structure;
2) respectively excavating a long and narrow foundation pit at two sides of the box culvert along the direction of the box culvert 8, and stopping excavating when the height difference between the bottom of the long and narrow foundation pit and the bottom of the large rigid box culvert is equal to the sum of the heights of the pipe shed component in the shape of a Chinese character 'jing' and the jacking component;
4) reserving soil mass right below the box culvert, excavating power pipe gallery foundation pits on two sides of the box culvert along the direction perpendicular to the box culvert, and then grouting and reinforcing the soil mass 11 outside two sides of the power pipe gallery foundation pits and right below the box culvert; the grouting reinforcement comprises direct-insertion grouting reinforcement vertically arranged on the outer side of the large rigid box culvert and inclined-insertion grouting reinforcement obliquely arranged. The soil body grouting reinforcement is used as a supporting structure of a power pipe gallery foundation pit under the large rigid box culvert while improving the bearing capacity of the foundation of the large rigid box culvert;
5) supporting components are arranged at the two sides of the power pipe gallery foundation pit and at the outer edges of the two sides of the box culvert, four steel pipe piles 1 are respectively arranged at four intersections of the two sides of the power pipe gallery foundation pit and the outer edges of the two sides of the box culvert, and supporting steel plates and the steel pipe piles are welded to form integral construction;
6) the jacking assembly is arranged on a supporting steel plate, a jack 3 and a round pull rod 4 are respectively fixedly connected with the supporting steel plate 2 through bolts, and round holes arranged on two sides of a bearing steel plate 5 are sleeved on the upper end part of the round pull rod 4 in a penetrating manner and pressed on the top end part of the jack 3; the steel girder 6 in the pipe shed component is distributed in parallel to the box culvert, and two ends of the steel girder 6 are respectively connected with a bearing steel plate 5 in a spot welding manner;
7) drilling holes in the soil body right below the box culvert by using a handheld wind pressure drilling machine, wherein the drilling position is located between the bottom of the box culvert and the steel girder, the drilling direction is vertical to the box culvert and the steel girder, the hole diameter of the drilling hole is matched with the outer diameter of the steel perforated pipe and is matched with the height difference between the bottom of the box culvert and the steel girder, one steel perforated pipe is timely installed and inserted after each hole is drilled, and the two end parts of the installed steel perforated pipe 7 are located above the two groups of steel girders 6 until all the steel perforated pipes 7 are installed;
8) starting four jacks 3 in the jacking assembly to jack the whole shaft-shaped pipe shed structure until the axial force value displayed by the axial force meter reaches a preset value, then excavating a soil body right below the box culvert, and performing power pipe gallery construction until the bearing capacity of the pipe gallery structure reaches a design value;
9) after the construction of the power pipe gallery is finished, backfilling foundation pits above the power pipe gallery and right below the box culvert until the position of a bottom plate of the box culvert, and injecting cement paste into the backfilled soil body through grouting holes in the steel flower pipes by using a grouting machine until the grouting pressure reaches a set value; when the injected cement slurry reaches the design strength, the supporting assembly, the jacking assembly and the I-shaped steel main beam are removed;
10) and backfilling the power pipe gallery foundation pit and the long and narrow foundation pits on the two sides of the box culvert, removing the steel sheet piles for foundation pit enclosure, and recovering the field.
The design points of the utility model also include:
1. the I-shaped steel girder 6 parallel to the direction of the large-scale rigid box culvert and the steel perforated pipe 7 which is arranged above the I-shaped steel girder and is vertical to the I-shaped steel girder are used as a well-shaped pipe shed for supporting the large-scale rigid box culvert.
2. Set up the jacking subassembly of taking the axial force meter and apply vertical prestressing force between "well" font pipe-shed subassembly and the steel-pipe pile that support large-scale rigid box culvert, through the whole "well" font pipe-shed of jacking subassembly jacking of taking the axial force meter, realize that the pipe-shed effectively supports large-scale rigid box culvert.
3. The soil body slip casting that just is located large-scale rigid box culvert under outside the electric power piping lane foundation ditch is consolidated, and this soil body slip casting is consolidated and is regarded as the supporting construction of its under electric power piping lane foundation ditch when improving large-scale rigid box culvert foundation bearing capacity.
4. Based on the structure, adopt hand-held type wind pressure drilling machine to drill one by one and can effectively reduce large-scale rigidity box culvert ground disturbance by hole installation steel floral tube under the bottom plate of large-scale rigidity box culvert.
5. Based on the structure, adopt slip casting machine to inject grout liquid into the soil body under large-scale rigid box culvert, can improve the closely knit degree of foundation ditch backfill under the large-scale steel case pipeline.
The part of the utility model which is not described is the same as the prior art.
Claims (4)
1. Protection device is used in construction of passing large-scale rigid box culvert under electric power pipe gallery, its characterized in that, including supporting component, jacking subassembly and pipe shed subassembly, wherein: the supporting component comprises four steel pipe piles and supporting steel plates arranged on the top end face of each steel pipe pile; the jacking assembly comprises a jack with an axial force meter, a plurality of steel round pull rods and a bearing steel plate, wherein the jack is positioned in the center of the upper end face of the supporting steel plate and is in bolted connection with the supporting steel plate, the steel round pull rods are positioned at the edge of the upper end face of the supporting steel plate and take the jack as a symmetric center, and the bearing steel plate is arranged on the steel round pull rods; the pipe shed component comprises two groups of double-spliced I-shaped steel main beams and a plurality of steel floral pipes which are distributed perpendicular to the steel main beams and erected on the upper end surfaces of the two groups of steel main beams; round holes are arranged on two sides of the bearing steel plate and penetrate through the round holes to be sleeved on the upper end part of the round pull rod.
2. The protection device for the construction of penetrating the large-scale rigid box culvert under the power pipe gallery according to claim 1, wherein the supporting steel plate and the bearing steel plate are both square steel plates or round steel plates.
3. The protection device for construction of penetrating the large-scale rigid box culvert under the power pipe gallery according to claim 1, wherein the steel pipe piles, the supporting steel plates, the jacks and the bearing steel plates are coaxially arranged, one end of each steel round pull rod is connected with the supporting steel plate through a bolt, the other end of each steel round pull rod is vertically upward, and the bearing steel plates are sleeved at the vertical upper end parts of the steel round pull rods in a penetrating manner.
4. The protection device for construction of penetrating the large-scale rigid box culvert under the power pipe gallery according to claim 1, wherein the steel perforated pipe is a seamless steel pipe, and a plurality of grouting holes are distributed on the side wall of the steel perforated pipe at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020949986.8U CN212534232U (en) | 2020-05-29 | 2020-05-29 | Protection device for construction of penetrating large-scale rigid box culvert under power pipe gallery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020949986.8U CN212534232U (en) | 2020-05-29 | 2020-05-29 | Protection device for construction of penetrating large-scale rigid box culvert under power pipe gallery |
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| Publication Number | Publication Date |
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| CN212534232U true CN212534232U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020949986.8U Active CN212534232U (en) | 2020-05-29 | 2020-05-29 | Protection device for construction of penetrating large-scale rigid box culvert under power pipe gallery |
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- 2020-05-29 CN CN202020949986.8U patent/CN212534232U/en active Active
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