CN214534802U - Assembled back wall for incremental launching construction - Google Patents
Assembled back wall for incremental launching construction Download PDFInfo
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- CN214534802U CN214534802U CN202022653675.XU CN202022653675U CN214534802U CN 214534802 U CN214534802 U CN 214534802U CN 202022653675 U CN202022653675 U CN 202022653675U CN 214534802 U CN214534802 U CN 214534802U
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Abstract
The utility model discloses a top pushes away construction with assembled back wall, including reinforced concrete prefabricated panel, the supporting component, the drawknot bolt and face the soil side and remove a silk stock, two reinforced concrete prefabricated panels are parallel and the interval setting in perpendicular to top pushing direction, and the supporting component is arranged in between two reinforced concrete prefabricated panels, and the both sides of supporting component are connected with the reinforced concrete prefabricated panel who is close to the top and pushes away with the jack through the drawknot bolt, and the opposite side is connected with the foundation ditch lateral wall through facing the soil side and removing a silk stock and keeping away from the reinforced concrete prefabricated panel that the top pushed away with the jack. The assembled back wall for pushing construction of the utility model adopts an assembled structure, and two reinforced concrete prefabricated panels and supporting members are hoisted in place after being fastened by bolts and then fastened on the side wall of the foundation pit by bolting with the anchor rod; simple structure is light, preparation and installation are dismantled conveniently, recycle is high, can guarantee the intensity and the stability of back wall structure simultaneously.
Description
Technical Field
The utility model relates to a pipe pushes away construction technical field, concretely relates to push away construction with assembled back wall.
Background
The pipe jacking technology is a non-grooving construction technology for jacking a pipeline into the ground section by means of a jacking device and laying the pipeline, and is mainly applied to an engineering measure adopted when the pipeline passes through the existing obstacles such as a canal, an embankment, a road, a railway and the like in the industries such as water conservancy, municipal administration, petrochemical industry, electric power, traffic communication and the like at present.
The pipe jacking construction is a method for laying underground pipes developed after shield construction, and the main working principle of the method is that an originating well and a receiving well are respectively built at two ends of an underground construction pipeline, and a pipe jacking machine and pipes behind the machine are jacked from the originating well to the receiving well in the originating well by means of a back wall and a jack cylinder thrust without excavating the underground pipes laid on the ground along the pipeline. The technology has the advantages of less occupied area removal, small traffic influence, high construction speed, high construction efficiency and the like, and is widely applied to engineering construction for laying various underground pipelines.
The back wall of the starting well has enough strength to ensure that the maximum reverse thrust acted by a jack cylinder can be borne in the pipe jacking construction; and should have sufficient rigidity to deform within an allowable range upon receiving a repulsive force. The back wall surface is straight and perpendicular to the axis of the jacking pipeline.
In the existing pipe jacking construction, a back wall of an originating well is generally of a cast-in-place reinforced concrete block structure; when the back wall is constructed, the operations of steel bar binding, template manufacturing and installation, concrete pouring, maintenance strength, need to reach the age, later-period back wall dismantling and the like are needed, the construction procedures are multiple, the construction period is long, and the construction progress of the jacking pipe is easily influenced. Therefore, how to reduce the construction time of the back wall on site, improve the installation efficiency and ensure the construction progress is the work of the jacking pipe construction progress on the key line.
Disclosure of Invention
An object of the utility model is to provide a top pushes away construction and uses assembled back wall, simple structure, dismantlement convenience and repeatedly usable.
For realizing above-mentioned mesh, the utility model discloses an assembly back wall is used in top pushing construction, remove a stock, two including prefabricated panel of reinforced concrete, supporting element, drawknot bolt and face the soil side the prefabricated panel of reinforced concrete is parallel and the interval sets up in the perpendicular to top pushing direction, the supporting element is arranged in two between the prefabricated panel of reinforced concrete, the both sides of supporting element are passed through the drawknot bolt with be close to the top and push up and use the jack the prefabricated panel of reinforced concrete is connected, and the opposite side passes through face the soil side and remove a stock and keep away from the top pushes up and use the jack reinforced concrete prefabricated panel and foundation ditch lateral wall are connected.
Preferably, the reinforced concrete prefabricated panel is provided with a reserved bolt hole for installing the tie bolt or the anchor rod for withdrawing the wire on the soil side, and the size and the position of the reserved bolt hole correspond to those of the corresponding bolt hole on the supporting member.
Preferably, the thickness of the reinforced concrete prefabricated panel is 25-40 cm, the diameter of the reserved bolt holes is 18-22 mm, and the distance between every two adjacent reserved bolt holes is 15-25 cm.
As the preferred scheme, the upper end of each reinforced concrete prefabricated panel is provided with a hoisting anchor bar which is U-shaped and extends out of the upper end surface of the reinforced concrete prefabricated panel.
Preferably, the supporting member comprises an annular steel plate, an inner layer steel cylinder and an outer layer steel cylinder, the inner layer steel cylinder and the outer layer steel cylinder are equal in axial length and different in diameter, and the inner layer steel cylinder and the outer layer steel cylinder are coaxially sleeved along the pushing direction and then are welded and connected with the annular steel plate to form a whole.
Preferably, the reinforced concrete prefabricated panel is a C30 reinforced concrete panel, and the double layers of the reinforced concrete prefabricated panel are provided with steel mesh sheets in a bidirectional mode.
Preferably, the inner diameter of the annular steel plate is 80cm, the outer diameter of the annular steel plate is 240cm, and the thickness of the annular steel plate is 3-5 cm; the inner diameter of the inner layer steel cylinder and the inner diameter of the outer layer steel cylinder are respectively 120cm and 200cm, and the thickness of the inner layer steel cylinder and the outer layer steel cylinder is 3 cm.
As a preferred scheme, two layers of the reserved bolt holes distributed annularly are reserved on the reinforced concrete prefabricated panel, the distribution diameter of the reserved bolt holes on the outer layer is 220cm, and the number of the reserved bolt holes is 34; the distribution diameter of the reserved bolt holes of the inner layer is 100cm, and the number of the reserved bolt holes is 16.
Preferably, the diameters of the rod parts of the tie bolt and the anchor rod for withdrawing the wire on the soil facing side are 20 mm.
The utility model has the advantages that: the assembled back wall for pushing construction of the utility model adopts an assembled structure, and only two assembled components such as reinforced concrete prefabricated panels, supporting components and the like need to be simply transported to the site, and after the prefabricated components are fastened by bolts, the prefabricated back wall is hoisted in place and then fastened on the side wall of the foundation pit by bolting with the anchor rod; simple structure is light, preparation and installation are dismantled conveniently, recycle is high, can guarantee the intensity and the stability of back wall structure simultaneously, are favorable to accelerating the construction progress, improve the efficiency of construction, practice thrift construction cost.
Drawings
Fig. 1 is a schematic diagram of the pushing construction of the assembled back wall for pushing construction according to the preferred embodiment of the present invention.
Fig. 2 is a schematic structural view of the reinforced concrete prefabricated panel of fig. 1.
Fig. 3 is a schematic structural view of the support member in fig. 1 after a tie bolt is installed.
Fig. 4 is a side view of the support member of fig. 2.
The components in the figures are numbered as follows: prefabricating a panel 1 by using reinforced concrete (wherein bolt holes 11 and hoisting anchor bars 12 are reserved); the anchor rod comprises a supporting member 2 (wherein, an annular steel plate 21, an inner layer steel cylinder 22 and an outer layer steel cylinder 23), a drawknot bolt 3, an anchor rod 4 for withdrawing wires from the soil side, an installation pipeline 5 and a jack 6.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
The utility model provides a repeatedly usable pushes away construction with assembled back wall, will push away through the bolt and screw up firm connection with steel cylinder form supporting component with jack atress side reinforced concrete prefabricated panel, steel cylinder form supporting component is firm with the prefabricated panel bolt joint of biography power side reinforced concrete, and atress side reaches atress side reinforced concrete prefabricated panel and steel cylinder form supporting component and connects into a whole like this to fix on facing the soil side with the crab-bolt of reserving on the foundation ditch lateral wall.
Referring to fig. 1, the fabricated back wall for incremental launching construction according to the preferred embodiment of the present invention includes a reinforced concrete prefabricated panel 1, a supporting member 2, a tie bolt 3, and a wire-withdrawing anchor rod 4 facing the soil side. Specifically, two reinforced concrete prefabricated panels 1 are arranged in a direction perpendicular to the pushing direction (the direction indicated by an arrow in fig. 1), and the distance between the two reinforced concrete prefabricated panels 1 is equal to the thickness of the supporting member 2 in the pushing direction. The two reinforced concrete prefabricated panels 1 are supported at the bottom of the launching well, wherein the reinforced concrete prefabricated panel 1 close to the installation pipeline 5 is a stress side, and the reinforced concrete prefabricated panel 1 far away from the installation pipeline 5 is a force transmission side. One side of the supporting member 2 is connected with the reinforced concrete prefabricated panel 1 on the stressed side through the tie bolt 3, and the other side is connected with the reinforced concrete prefabricated panel 1 on the force transmission side and the soil foundation on the soil facing side of the foundation pit through the soil facing side wire withdrawing anchor rod 4. In the illustrated embodiment, the reinforced concrete prefabricated panel 1 on the force-receiving side is a supporting surface of a jack 6, and the jack 6 applies jacking force to the installation pipeline 5 in the jacking direction.
Referring to fig. 2, the reinforced concrete prefabricated panel 1 is provided with reserved bolt holes 11, and the size and the position of the reserved bolt holes 11 correspond to the size and the position of bolt holes on the corresponding side of the support member 2, so that the tie bolts 3 and the anchor rods 4 for removing wires on the soil facing side penetrate through the reserved bolt holes 11, and the reinforced concrete prefabricated panel 1 is connected into a whole through the support member 2 in the middle and is connected with the soil foundation of the launching well. For hoisting. In the illustrated embodiment, two hoisting anchor bars 12 are arranged at the upper end of each reinforced concrete prefabricated panel 1; in other embodiments, two or more hoisting anchor bars 12 are reserved on each reinforced concrete prefabricated panel 1, so as to facilitate hoisting, transportation, disassembly and recycling of the reinforced concrete prefabricated panel 1.
Referring to fig. 3 and 4, the supporting member 2 is formed by welding an annular steel plate 21 to an inner layer steel cylinder 22 and an outer layer steel cylinder 23, the inner layer steel cylinder 22 and the outer layer steel cylinder 23 are annular steel cylinders with the same thickness and different diameters, and the inner layer steel cylinder 22 and the outer layer steel cylinder 23 are coaxially sleeved along the pushing direction and then are welded and connected with the annular steel plate 21 to form a whole. The sizes and the positions of the reserved bolt holes (not marked) on the annular steel plates 21 at the two sides correspond to the sizes and the positions of the reserved bolt holes 11 on the reinforced concrete prefabricated panel 1 at the stressed side and the reinforced concrete prefabricated panel 1 at the force transmission side respectively, and the reserved bolt holes are used for being fixed with the reinforced concrete prefabricated panels 1 at the front side and the rear side in a pulling mode. The reserved bolt holes 11 on the reinforced concrete prefabricated panel 1 on the stressed side are fixedly tied with the bolt holes on the annular steel plates 21 on the corresponding side of the supporting member 2 through tie bolts 3. The reserved bolt hole 11 of the reinforced concrete prefabricated panel 1 on the force transmission side is fixed with the bolt hole on the annular steel plate 21 on the corresponding side of the supporting member 2 through the anchor rod 4 for withdrawing the wire on the soil facing side in a pulling mode to form a whole.
Generally, the thickness of the reinforced concrete prefabricated panel 1 is 25 cm-40 cm, the diameter of the reserved bolt holes 11 (the tie bolts 3) is 18 mm-22 mm, and the distance between the adjacent tie bolts 3 (the adjacent reserved bolt holes 11) is 15 cm-25 cm. The thickness and the size of the reinforced concrete prefabricated panel 1 and the number of the reserved bolt holes 11 can be properly adjusted according to the change of the diameter of the pushed mounting pipeline 5 between 600mm and 2600 mm. Similarly, the inner diameter, the number (more than two steel cylinders can be set) of the steel cylinders of the supporting member 2, the specification of the annular steel plate 21 and other parameters can be adjusted according to the diameter of the pushed installation pipeline from 600mm to 2600mm so as to ensure the integral rigidity and stability of the back wall.
Taking the diameter of the installation pipeline 5 as 1600mm as an example, the reinforced concrete prefabricated panel 1 on the force transmission side is a C30 reinforced concrete panel with the thickness of 30cm, and the double layers of the reinforced meshes are arranged bidirectionally. Two layers of reserved bolt holes 11 with phi of 21.5mm are reserved on the reinforced concrete prefabricated panel 1 on the force transmission side in an annular distribution mode, wherein the distribution diameter of the reserved bolt holes 11 on the outer layer is 220cm, and the number of the reserved bolt holes is 34; the distribution diameter of the inner layer reserved bolt holes 11 is 100cm, and the number of the inner layer reserved bolt holes is 16. After the reinforced concrete prefabricated panel 1 on the force transmission side is hoisted in place through the hoisting anchor bars 12, the reinforced concrete prefabricated panel 1 on the force transmission side is fixed on the rock side wall on the soil facing side of the foundation pit through the reserved bolt holes 11 and the wire withdrawing anchor rods 4 on the soil facing side. The specification of the reinforced concrete prefabricated panel 1 on the stressed side is the same as that of the reinforced concrete prefabricated panel 1 on the force transmission side, the number and the positions of the reserved bolt holes 11 are the same as those of the annular steel plates 21, and the supporting member 2 and the reinforced concrete prefabricated panel 1 on the stressed side are fastened by the annular steel plates 21 close to the stressed side through the drawknot bolts 3 with phi of 20 mm.
When the diameter of the installation pipeline 5 is 1600mm, the inner diameter of the annular steel plate 21 of the support member 2 is 80cm, the outer diameter is 240cm, and the thickness is 3-5 cm; the inner diameter of the inner layer steel cylinder 22 and the outer layer steel cylinder 23 are respectively 120cm and 200cm, and the thickness is 3 cm. The number and the arrangement of the reserved bolt holes on the annular steel plate 21 are the same as those of the reserved bolt holes 11 on the corresponding reinforced concrete prefabricated panel 1. The annular steel plate 21 close to the force transmission side fastens the steel cylinder-shaped supporting member 2 and the reinforced concrete precast slab 3 at the force transmission side through the wire-withdrawing anchor rod 4 at the soil facing side with the diameter of phi 20mm and is anchored with the side wall of the foundation pit.
Compared with the prior art, the utility model discloses a top pushes away construction and has following beneficial effect with assembled back wall:
(1) the prefabricated structure is adopted, and only two prefabricated components such as reinforced concrete prefabricated panels, supporting components and the like need to be simply transported to the site, and are hoisted in place after being fastened through bolts and then are fastened on the side wall of the foundation pit in a bolted mode together with anchor rods;
(2) the structure is simple and light, the manufacture, the installation and the disassembly are convenient, the recycling rate is high, the strength and the stability of the back wall structure can be ensured, the construction progress can be accelerated, the construction efficiency can be improved, and the construction cost can be saved;
(3) the specification of the reinforced concrete prefabricated panel, the number of the reserved bolt holes, the number and specification of steel cylinders in the supporting member, the size of the annular steel plate and the like can be reasonably designed according to needs so as to ensure the strength and the overall stability of the assembled back wall structure at different pipe jacking construction sections.
To sum up, the assembled back wall for incremental launching construction of the utility model provides a reusable back wall, which has simple structure, convenient assembly and disassembly, short construction period and high recycling rate; meanwhile, the pushing device has enough integral rigidity, can bear and transmit large pushing counter force, completely meets the requirement of pushing construction, and is greatly convenient to popularize and apply.
The above-mentioned embodiments of the present invention only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not limited thereto. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
1. The utility model provides a top pushes away construction with assembled back wall which characterized in that: the reinforced concrete prefabricated panel support is characterized by comprising reinforced concrete prefabricated panels (1), supporting members (2), tie bolts (3) and an earth facing side wire withdrawing anchor rod (4), wherein the two reinforced concrete prefabricated panels (1) are arranged in parallel and at intervals in the direction perpendicular to the pushing direction, the supporting members (2) are arranged between the two reinforced concrete prefabricated panels (1), two sides of each supporting member (2) are connected with the reinforced concrete prefabricated panel (1) close to a jack (5) for pushing through the tie bolts (3), and the other side of each supporting member is connected with the reinforced concrete prefabricated panel (1) far away from the jack (5) for pushing through the earth facing side wire withdrawing anchor rod (4) and the side wall of a foundation pit.
2. The fabricated back wall for incremental launching construction according to claim 1, wherein: and the reinforced concrete prefabricated panel (1) is provided with a reserved bolt hole (11) for installing the tie bolt (3) or the wire withdrawing anchor rod (4) on the soil facing side, and the size and the position of the reserved bolt hole (11) correspond to the size and the position of a corresponding bolt hole on the supporting member (2).
3. The fabricated back wall for incremental launching construction according to claim 2, wherein: the thickness of the reinforced concrete prefabricated panel (1) is 25-40 cm, the diameter of the reserved bolt holes (11) is 18-22 mm, and the distance between every two adjacent reserved bolt holes (11) is 15-25 cm.
4. The fabricated back wall for incremental launching construction according to claim 2, wherein: the upper end of each reinforced concrete prefabricated panel (1) is provided with a hoisting anchor bar (12), and the hoisting anchor bars (12) are U-shaped and extend out of the upper end surface of each reinforced concrete prefabricated panel (1).
5. The fabricated back wall for incremental launching construction according to any one of claims 1 to 4, wherein: the supporting member (2) comprises an annular steel plate (21), an inner steel cylinder (22) and an outer steel cylinder (23), the axial lengths of the inner steel cylinder (22) and the outer steel cylinder (23) are equal but the diameters of the inner steel cylinder and the outer steel cylinder are different, and the inner steel cylinder (22) and the outer steel cylinder (23) are coaxially sleeved along the pushing direction to form a whole, and then the end surfaces of the two sides of the whole are welded with the annular steel plate (21).
6. The fabricated back wall for incremental launching construction according to claim 5, wherein: the reinforced concrete prefabricated panel (1) is a C30 reinforced concrete panel, and a double-layer bidirectional configuration steel bar net piece is arranged.
7. The fabricated back wall for incremental launching construction according to claim 5, wherein: the inner diameter of the annular steel plate (21) is 80cm, the outer diameter of the annular steel plate is 240cm, and the thickness of the annular steel plate is 3-5 cm; the inner diameter of the inner layer steel cylinder (22) and the inner diameter of the outer layer steel cylinder (23) are respectively 120cm and 200cm, and the thickness is 3 cm.
8. The fabricated back wall for incremental launching construction according to claim 2, wherein: two layers of reserved bolt holes (11) distributed in an annular mode are reserved in the reinforced concrete prefabricated panel (1), the distribution diameter of the reserved bolt holes (11) in the outer layer is 220cm, and the number of the reserved bolt holes is 34; the distribution diameter of the reserved bolt holes (11) in the inner layer is 100cm, and the number of the reserved bolt holes is 16.
9. The fabricated back wall for incremental launching construction according to claim 8, wherein: the diameters of the rod parts of the drawknot bolt (3) and the anchor rod (4) withdrawing the wires on the soil facing side are 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022653675.XU CN214534802U (en) | 2020-11-16 | 2020-11-16 | Assembled back wall for incremental launching construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022653675.XU CN214534802U (en) | 2020-11-16 | 2020-11-16 | Assembled back wall for incremental launching construction |
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| CN214534802U true CN214534802U (en) | 2021-10-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396283A (en) * | 2022-02-15 | 2022-04-26 | 海南大学 | Construction method of assembled pipe-jacking working well |
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- 2020-11-16 CN CN202022653675.XU patent/CN214534802U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396283A (en) * | 2022-02-15 | 2022-04-26 | 海南大学 | Construction method of assembled pipe-jacking working well |
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