CN212294747U - Pipe jacking well structure - Google Patents
Pipe jacking well structure Download PDFInfo
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- CN212294747U CN212294747U CN202021381996.2U CN202021381996U CN212294747U CN 212294747 U CN212294747 U CN 212294747U CN 202021381996 U CN202021381996 U CN 202021381996U CN 212294747 U CN212294747 U CN 212294747U
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Abstract
The utility model discloses a pipe jacking well structure, which comprises a plurality of steel sheet piles which are vertically and detachably inserted in the soil, wherein a plurality of steel sheet piles enclose a hollow construction space; at least one layer of enclosing purlin structure is fixedly arranged on the inner side of the steel sheet pile in the construction space; the enclosing purlin structure comprises a plurality of enclosing purlins fixedly arranged on the inner side surfaces of the steel sheet piles, the plurality of enclosing purlins are sequentially fixed and connected end to end, the bottom of each enclosing purlin is provided with a support piece, and a corner brace is connected between every two adjacent enclosing purlins; and the lower part of the steel sheet pile is provided with an open caisson body. The utility model discloses a push pipe well structure can exert steel sheet pile construction convenience, efficient characteristics, also can exert advantages such as reinforced concrete open caisson rigidity is big simultaneously, the lateral wall bears the weight of dynamic height, the wholeness is good and the security is high, can maximize compromise efficiency, economy and safety to reach effectual reduction construction period, reduce engineering cost's purpose.
Description
Technical Field
The utility model relates to an underground building structure and municipal works field especially relate to a pipe jacking well structure.
Background
Due to the shortage of the investment of environmental management and the fragile ecological environment system, the problem of environmental pollution is prominent. Particularly in the field of water environment, the phenomena of incomplete pipe network system, direct discharge of domestic sewage and the like are still common, the water ecology is seriously damaged, and the environmental hidden danger is more. In the concrete implementation process of pipe network engineering, the construction method of the pipeline is determined by comprehensive comparison of technology and economy according to the soil layer property, pipe diameter, underground water level, nearby underground and overground buildings and other factors of the pipeline. When the excavation condition is met, the pipeline can be laid in an open ditch excavation form or support excavation is adopted; when the pipeline is buried deeply and the excavation working surface is limited or the slope cannot be set due to the soil condition, the construction can be carried out by adopting a pipe jacking mode, a traction mode and other subsurface excavation modes.
In the prior art, a pipe network for improving a water environment is generally improved aiming at the existing sewage pipe network in an old city. In the transformation process, the pipelines of the sewage pipe network except part of main trunk pipes and most of branch pipes go deep into the community, so that the life of residents nearby is greatly influenced if the community is excavated, and meanwhile, because the community has narrow roads and both sides of the roads are civil houses which are long-term, the open excavation construction has greater risk, so the underground excavation construction method is a main pipeline construction method in the projects.
According to the feedback of practical engineering experience, the pipeline constructed in a traction mode presents a wavy condition in a soil layer, silting is easy to generate after a long time, so that the drainage effect is influenced, and a pipe-jacking construction method is preferably selected in many areas when an underground excavation construction method is selected. The pipe-jacking well structure is generally constructed by using an open caisson method or a reverse method. The construction personnel can operate outside the well during the open caisson method construction, the operation process is safe, the influence of small soil excavation amount on adjacent buildings is small, the reverse method needs to cast reinforced concrete after excavation, drainage operation should be carried out before construction, the construction period is long, and for areas with high underground water level, poor soil quality and complex surrounding environment, the open caisson method is generally selected for constructing the pipe jacking well.
In the open caisson construction method in the prior art, the open caisson sinking speed is low, the peripheral soil body can be pulled down and deformed in the open caisson sinking process, the local part can also generate flowing soil and gushing sand, and the stability of the foundation constructed nearby the periphery can be greatly influenced. In addition, the reinforced concrete open caisson and other related supporting structures have no reusability, and the cost and the waste are high when the reinforced concrete open caisson and other related supporting structures are used as temporary supports. On the other hand, in some projects, steel sheet pile supports are adopted to directly serve as pipe jacking wells, the steel sheet pile supports have the advantage of high construction efficiency, but the steel sheet piles are low in rigidity, and when the steel sheet piles are used as the pipe jacking well, if jacking force is too large, the steel sheet piles can deform greatly, upper steel supports can fall off due to too large deformation, and great construction risks exist.
In conclusion, a construction method which can not only bring the characteristics of convenience and high efficiency of steel sheet pile construction into play, but also bring the advantages of high rigidity, high side wall bearing capacity, good integrity, high safety and the like of the reinforced concrete open caisson into play is needed, and meanwhile, the temporary support can be repeatedly used for many times, so that the efficiency, economy and safety are maximally considered, and the purposes of effectively shortening the construction period and reducing the construction cost are achieved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model aims at providing a pipe jacking well structure, this pipe jacking well structure can exert steel sheet pile construction convenience, efficient characteristics, also can exert advantages such as reinforced concrete open caisson rigidity is big simultaneously, the lateral wall bears the weight of dynamic height, the wholeness is good and the security is high, can used repeatedly simultaneously, and efficiency, economy and safety are taken into account to the maximize to reach effectual construction period that shortens, reduce engineering cost's purpose.
In order to achieve the purpose, the utility model provides a pipe jacking well structure, which comprises a plurality of steel sheet piles vertically and detachably inserted in soil, wherein a plurality of steel sheet piles surround a hollow construction space;
at least one layer of enclosing purlin structure is fixedly arranged on the inner side of the steel sheet pile in the construction space;
the enclosing purlin structure comprises a plurality of enclosing purlins fixedly arranged on the inner side surfaces of the steel sheet piles, the plurality of enclosing purlins are sequentially fixed and connected end to end, the bottom of each enclosing purlin is provided with a support piece, and a corner brace is connected between every two adjacent enclosing purlins;
and the lower part of the steel sheet pile is provided with an open caisson body.
As a preferred scheme, the number of the enclosing purlins is four, and the four enclosing purlins enclose a square; the enclosing purlin is made of I-shaped steel.
Preferably, the support piece is a steel bracket;
the steel bracket comprises a supporting plate which is horizontally arranged and fixedly connected with the bottom of the enclosing purlin, and a triangular rib plate is vertically and fixedly arranged at the bottom of the supporting plate;
the supporting plate and the rib plate are arranged in a T shape.
Preferably, medium coarse sand is filled between the open caisson body and the inner wall of the steel sheet pile.
As a preferred scheme, the bottom of the open caisson body is provided with an open caisson bottom plate, and the bottom of the open caisson bottom plate is provided with bottom sealing concrete;
and a jacking pipe rear seat wall is arranged on the open caisson body.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the pipe jacking well structure of the utility model uses the steel sheet pile as a support in the open caisson construction method, a plurality of steel sheet piles vertically inserted in the soil are adopted to enclose a hollow construction space, and at least one layer of purlin enclosing structure is fixedly arranged at the inner side of the steel sheet pile in the construction space; the enclosing purlin structure comprises a plurality of enclosing purlins fixedly arranged on the inner side surfaces of the steel sheet piles, the plurality of enclosing purlins are sequentially fixed and connected end to end, the bottom of each enclosing purlin is provided with a support piece, and an angle brace is connected between every two adjacent enclosing purlins; the lower part of the steel sheet pile is provided with an open caisson body. After the open caisson construction is completed, the steel surrounding purlin, the angle brace and the steel sheet pile can be sequentially detached, and the steel sheet pile is recycled. The steel sheet pile is used as the open caisson support, the support is formed in the range from 5m to 6m on the upper portion of the push caisson foundation pit by utilizing the characteristic that the steel sheet pile is convenient and fast to construct, then the support structure is formed in the range from 4m to 5m on the lower portion of the foundation pit for the operation of the push caisson structure by utilizing the characteristic that the open caisson body is high in rigidity, and therefore the advantages of the steel sheet pile and the open caisson construction are brought into play as far as possible, and the advantages are complementary.
The utility model discloses a push pipe well structure can exert steel sheet pile construction convenience, efficient characteristics, also can exert advantages such as reinforced concrete open caisson rigidity is big simultaneously, the lateral wall bears the weight of dynamic height, the wholeness is good and the security is high, the steel sheet pile and enclose the purlin structure and can retrieve and recycle to efficiency, economy and safety are taken into account to the maximize, thereby reach effectual construction period that shortens, reduce engineering cost's purpose.
Drawings
FIG. 1 is a schematic structural view of a pipe jacking well structure in an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural diagram of a purlin structure.
In the figure, 1, steel sheet piles; 2. steel corbels; 21. a support plate; 22. a rib plate; 3. steel purlin; 4. a steel gusset; 5. an open caisson body; 6. medium coarse sand; 7. sealing bottom concrete; 8. a bottom plate of the open caisson; 9. the pipe jacking rear seat wall.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The preferred embodiment of the pipe jacking well structure of the utility model, as shown in fig. 1 to fig. 3, comprises a plurality of steel sheet piles 1 vertically and detachably inserted in the soil, and a plurality of steel sheet piles 1 enclose a hollow construction space; the steel sheet pile 1 is a straight rod-shaped structure, the section of the steel sheet pile can be square or semicircular, and the like, and at least one layer of enclosing purlin structure is fixedly arranged on the inner side of the steel sheet pile 1 in the construction space; and the purlin enclosing structure is used for supporting and maintaining the steel sheet pile 1.
The purlin structure includes that a plurality of fixed purlins 3 that enclose of locating 1 medial surface of steel sheet pile, a plurality of purlin 3 that enclose fix in proper order and end to end connection, and each encloses purlin 3 and steel sheet pile 1 and is welded fastening, and the bottom that each encloses purlin 3 all is equipped with support piece, support piece simultaneously with steel sheet pile 1 with enclose purlin fixed connection, support piece is steel material simultaneously, support piece and steel sheet pile 1 enclose purlin welded fastening with the steel. The angle braces 4 are connected between the adjacent surrounding purlins 3 so as to further improve the supporting strength of the surrounding purlin structure; the lower part of the steel sheet pile 1 is provided with a sunk well body 5.
The utility model discloses a pipe jacking well structure can be in proper order demolish after open caisson construction is accomplished and enclose purlin 3, gusset 4 and steel sheet pile 1, retrieve 1 recycle of steel sheet pile. The steel sheet pile 1 is used as an open caisson support, a support is formed in the range from 5m to 6m at the upper part of a foundation pit of the push caisson by utilizing the characteristic that the steel sheet pile 1 is convenient and quick to construct, and then a support structure is formed in the range from 4m to 5m at the lower part of the foundation pit for the operation of the push caisson structure by utilizing the characteristic that the open caisson is high in rigidity, so that the respective advantages of the steel sheet pile 1 and the open caisson construction are brought into play as much as possible, and the advantages are complementary.
The utility model discloses a push pipe well structure can exert 1 construction convenience of steel sheet pile, efficient characteristics, also can exert advantages such as reinforced concrete open caisson body rigidity is big simultaneously, the lateral wall bears the weight of dynamic height, the wholeness is good and the security is high, steel sheet pile 1 and enclose 3 structures of purlin and can retrieve and recycle to efficiency, economy and safety of taking into account of maximize, thereby reach effectual construction period that shortens, reduce engineering cost's purpose.
Wherein, in the embodiment of this application, enclose purlin 3 and be equipped with four, enclose purlin 3 and specifically be the I-steel, four enclose purlin 3 and enclose into square form, and gusset 4 is platelike structure, and gusset 4 also is four, inclines to establish respectively on four angles of enclosing the purlin structure for connect adjacent two and enclose purlin 3.
Further, support piece 2 is the steel bracket, and is concrete, the steel bracket including the level arrange and with enclose bottom fixed connection's of purlin 3 backup pad 21, backup pad 21 and the bottom of enclosing purlin 4 can welded fastening or through fastener fixed connection such as bolt, the bottom of backup pad 21 is vertical fixed to be equipped with triangular's floor 22, backup pad 21 and floor 22 are the T type and arrange. The rib 22 is used for supporting the support plate 21 and improving the fixing function of the support plate 21.
Wherein, it has well coarse sand to fill between the inner wall of open caisson body 5 and steel sheet pile 1, and well coarse sand sinks along open caisson body 5 in step, is convenient for open caisson body 5's construction.
The bottom of the open caisson body 5 is provided with an open caisson bottom plate 8, and the bottom of the open caisson bottom plate 8 is provided with bottom sealing concrete 7; one side of the open caisson body 5 is provided with an ejection pipeline, and the open caisson body 5 opposite to the ejection pipeline is provided with a pipe-jacking rear seat wall 9.
During the specific construction, after the first section of the open caisson body 5 is sunk, the next section of the open caisson body 5 is constructed according to the same steps. And after the construction of all the open caisson bodies 5 is completed and the foundation pit is excavated to the designed elevation, pouring bottom sealing concrete 7 in time, wherein the bottom sealing concrete 7 can be used for selecting precipitation bottom sealing or underwater bottom sealing according to the construction method of the open caisson. And (4) after the bottom sealing concrete 7 is poured, draining accumulated water in the open caisson pit, constructing an open caisson bottom plate 8, and finishing the excavation work of the pipe jacking well. And after the construction of the open caisson bottom plate 8 is completed, constructing a pipe-jacking rear seat wall 9, installing pipe-jacking equipment and performing pipeline jacking operation, after the pipe-jacking operation is completed, constructing a corresponding inspection well as required, backfilling a foundation pit and removing horizontal supporting structures such as steel surrounding purlins and angle braces layer by layer. And (3) recovering the steel sheet pile 1 after the foundation pit is backfilled as required, and filling holes in the pile position by using medium sand or grouting.
The concrete construction method of the pipe jacking well structure comprises the following steps:
and S1, piling the plurality of steel sheet piles 1 subjected to the rust prevention treatment, and enclosing the plurality of steel sheet piles 1 to form a construction space. Before the steel sheet pile 1 is constructed, the steel sheet pile 1 is subjected to paying-off and positioning on site according to the requirements of design paper, so that the construction space surrounded by the steel sheet pile 1 can meet the requirements of subsequent open caisson body 5 construction, and the steel sheet pile 1 is subjected to rust prevention treatment before pile sinking, and can be specifically coated with epoxy coal tar pitch paint for protection. The locking notch should be filled with waterproof material. A guide frame is arranged before the steel sheet pile 1 is sunk so as to ensure the accuracy of the plane dimension. The verticality deviation in pile sinking should not be greater than 1/100, and the locking notch should be ensured to be tight.
S2, removing earthwork with a first depth of the construction space, and arranging a surrounding purlin structure on the steel sheet pile 1; firstly, a support piece 21 is arranged, and a plurality of annularly arranged surrounding purlins 3 are arranged at the upper part of the support piece 21; and secondly, corner supports 4 are fixedly arranged on the adjacent surrounding purlins 3. And (3) carrying out earth excavation after the construction of the steel sheet pile 1 is finished, and constructing a first purlin surrounding structure when the excavation is about 1 m deep. The steel bracket is constructed before the purlin 3 is enclosed in the construction, and the steel bracket includes backup pad 21 and floor 22, and backup pad 21 and floor 22 are T-shaped welded fastening, as shown in fig. 3, backup pad 21 and floor 22 all need with steel sheet pile 1 looks welding, and the welding seam quality grade is tertiary, and can carry out construction on next step after carrying out the outward appearance inspection acceptance. And (3) continuing downward excavation after the construction of the horizontal supporting structures such as the first enclosing purlin 3 and the angle brace 4 is finished, and constructing a second enclosing purlin structure when the excavation is about 4 meters deep, wherein the construction method of the second enclosing purlin structure is the same as that of the first enclosing purlin structure.
And S3, continuously removing earthwork at the third depth of the construction space downwards, and sequentially arranging the multiple sections of open caisson bodies 5. The open caisson body 5 can be reasonably selected to be drained and sunk or not according to specific geological conditions during construction. When underground water exists in the sinking depth range of the open caisson body 5 and silt or fine sand layers exist in soil layers or existing buildings or structures exist near the open caisson, sinking without drainage is recommended.
Specifically, the height of the first section of well wall body 5 containing the edge feet is about 2.5m, and after cushion facilities of the edge feet are prepared, open caisson steel bars are bound and templates are packaged. And after the template is packaged, pouring concrete, and after the strength of the concrete poured by the open caisson body 5 reaches 75% of the designed strength, beginning to sink the open caisson body 5. When the open caisson body 5 sinks, soil squeezing and sinking are adopted, the cutting edge can not be hollowed randomly, the soil digging is uniform and symmetrical, and effective measures are taken to keep the open caisson body to sink uniformly, uniformly and stably. Before sinking, the open caisson body 5 is filled with medium coarse sand 6 between the open caisson wall and the steel sheet pile 1 wall, and the medium coarse sand 6 sinks synchronously along with the open caisson wall 5. And after the first section of the open caisson body 5 is sunk, constructing the next section of the open caisson body 5 according to the same method.
And S4, after all the well walls are constructed and the foundation pit is excavated to the designed elevation, pouring bottom sealing concrete 7, wherein the bottom sealing concrete 7 can be used for selecting precipitation bottom sealing or underwater bottom sealing according to the construction method of the open caisson body 5, then removing accumulated water, and arranging an open caisson bottom plate 8 on the bottom sealing concrete 7. And finally, constructing the pipe jacking rear seat wall 9, installing pipe jacking equipment and carrying out pipeline jacking operation.
And S5, backfilling the foundation pit and removing the surrounding purlin 3, the corner brace 4 and the steel sheet pile 1 layer by layer after pipe jacking operation.
And after the pipe jacking operation is completed, constructing a corresponding inspection well as required, backfilling the foundation pit and removing horizontal supporting structures such as the steel purlins 3 and the angle braces 4 layer by layer. And (3) backfilling the foundation pit as required to finish the rear recyclable steel sheet pile 11, and filling the hole at the pile position of the steel sheet pile 11 by using medium sand or grouting.
The utility model discloses a push pipe well structure can exert 1 construction convenience of steel sheet pile, efficient characteristics, also can exert advantages such as reinforced concrete open caisson body rigidity is big simultaneously, the lateral wall bears the weight of dynamic height, the wholeness is good and the security is high, steel sheet pile 1 and enclose the purlin structure and can retrieve and recycle to efficiency, economy and safety of taking into account of maximize, thereby reach effectual construction period that shortens, reduce engineering cost's purpose.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (6)
1. A pipe jacking well structure is characterized by comprising a plurality of steel plate piles which are vertically and detachably inserted in soil, wherein a hollow construction space is defined by the steel plate piles;
at least one layer of enclosing purlin structure is fixedly arranged on the inner side of the steel sheet pile in the construction space;
the enclosing purlin structure comprises a plurality of enclosing purlins fixedly arranged on the inner side surfaces of the steel sheet piles, the plurality of enclosing purlins are sequentially fixed and connected end to end, the bottom of each enclosing purlin is provided with a support piece, and a corner brace is connected between every two adjacent enclosing purlins;
and the lower part of the steel sheet pile is provided with an open caisson body.
2. The pipe jacking well structure of claim 1, wherein the purlins are four, and four purlins enclose a square;
the enclosing purlin is made of I-shaped steel.
3. The pipe jacking well structure of claim 2, wherein said support member is a steel corbel;
the steel bracket comprises a supporting plate which is horizontally arranged and is fixedly connected with the bottom of the enclosing purlin, and a rib plate is vertically and fixedly arranged at the bottom of the supporting plate.
4. The pipe jacking well structure of claim 3, wherein said ribs are triangular, and said support plates and said ribs are arranged in a T-shape.
5. The push bench structure of claim 1, wherein medium grit is filled between said caisson body and the inner wall of said steel sheet pile.
6. The push bench structure of claim 1, wherein a bottom plate of the open caisson is arranged at the bottom of the open caisson body, and bottom sealing concrete is arranged at the bottom of the open caisson plate;
and a jacking pipe rear seat wall is arranged on the open caisson body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021381996.2U CN212294747U (en) | 2020-07-14 | 2020-07-14 | Pipe jacking well structure |
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| CN202021381996.2U CN212294747U (en) | 2020-07-14 | 2020-07-14 | Pipe jacking well structure |
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| CN212294747U true CN212294747U (en) | 2021-01-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111851588A (en) * | 2020-07-14 | 2020-10-30 | 中国能源建设集团广东省电力设计研究院有限公司 | A pipe jacking well structure and its construction method |
| CN113294159A (en) * | 2021-04-22 | 2021-08-24 | 核工业井巷建设集团有限公司 | High-stability working well structure suitable for long-distance large-section jacking pipe and construction method |
| CN114687355A (en) * | 2022-04-14 | 2022-07-01 | 北京京水建设集团有限公司 | Ship lock foundation pit excavation and supporting structure and construction method thereof |
-
2020
- 2020-07-14 CN CN202021381996.2U patent/CN212294747U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111851588A (en) * | 2020-07-14 | 2020-10-30 | 中国能源建设集团广东省电力设计研究院有限公司 | A pipe jacking well structure and its construction method |
| CN113294159A (en) * | 2021-04-22 | 2021-08-24 | 核工业井巷建设集团有限公司 | High-stability working well structure suitable for long-distance large-section jacking pipe and construction method |
| CN113294159B (en) * | 2021-04-22 | 2024-04-12 | 核工业井巷建设集团有限公司 | High-stability working well structure suitable for long-distance large-section jacking pipe and construction method |
| CN114687355A (en) * | 2022-04-14 | 2022-07-01 | 北京京水建设集团有限公司 | Ship lock foundation pit excavation and supporting structure and construction method thereof |
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