CN220599820U - Hollow steel pipe concrete pipe curtain structure - Google Patents

Hollow steel pipe concrete pipe curtain structure Download PDF

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Publication number
CN220599820U
CN220599820U CN202322186974.0U CN202322186974U CN220599820U CN 220599820 U CN220599820 U CN 220599820U CN 202322186974 U CN202322186974 U CN 202322186974U CN 220599820 U CN220599820 U CN 220599820U
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pipe
steel pipe
steel
concrete
wall
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CN202322186974.0U
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郭亮
王天明
张碧文
雷永生
李雷
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China Railway First Survey and Design Institute Group Ltd
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China Railway First Survey and Design Institute Group Ltd
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Abstract

The utility model relates to a hollow steel pipe concrete pipe curtain structure. The existing pipe curtain construction method has the problems of slow concrete forming, difficult pouring compaction, small bearing capacity and rigidity, overlarge pipe curtain deformation and the like. The structure of the utility model is a prefabricated structure and comprises an outer steel pipe and an inner steel pipe which are coaxially arranged, wherein a concrete hollow interlayer is arranged between the outer steel pipe and the outer steel pipe; the outer wall of the inner steel pipe is separated from the inner wall of the outer steel pipe through a supporting piece. The pipe curtain structure is prefabricated in a factory and transported to on-site jacking construction, so that the assembled and standardized rapid construction is realized, the construction procedure of casting concrete in a pipe on site is omitted, the construction cost is reduced, and the problem that the concrete in the pipe is difficult to cast compactly after the traditional pipe curtain is jacked in the steel pipe is effectively solved; the double steel pipe form not only effectively lightens dead weight, but also greatly improves bearing capacity and rigidity, and is beneficial to preventing deformation of a pipe curtain and uneven settlement of the steel pipe.

Description

Hollow steel pipe concrete pipe curtain structure
Technical Field
The utility model relates to the technical field of underground space construction, in particular to a hollow steel tube concrete pipe curtain structure.
Background
Urban underground railway pipelines are continuously increased, and pile foundation pipelines are distributed in an intricate manner, so that higher requirements are provided for underground construction. The method for constructing the urban subway tunnel mainly comprises an open excavation method, a shield method, a mining method and a shallow buried and underground excavation method, wherein the underground excavation construction mode is difficult to generate certain influence on the ground surface, and the ground surface subsidence is generated during tunnel construction. The pipe curtain construction method is an important construction method for shallow buried underground excavation construction, and can obviously reduce ground subsidence due to small influence on ground traffic and urban environment, and is widely applied to construction of subway stations, railways, roads, airports and the like, a pipe curtain steel pipe is jacked in by a directional drilling machine, and then concrete is poured in the pipe to form an advanced pre-support structure system for improving ground subsidence during excavation and controlling ground deformation.
However, the conventional pipe curtain construction method generally adopts a mode of pouring concrete in situ, and the concrete is formed slowly, so that the construction period is longer. In addition, the pipe curtain steel pipe is firstly jacked into the soil body and the soil body in the hollow pipe is cleared, then concrete is poured in the pipe to form a pipe curtain structure, and the research practical engineering shows that the concrete in the pipe is not easy to pour and compact, the pipe curtain bearing capacity and the rigidity are smaller, and the pipe curtain deformation is overlarge and needs to be improved.
Disclosure of Invention
The utility model aims to provide a hollow steel pipe concrete pipe curtain structure, which solves the problems of slow concrete molding, difficult pouring compaction, smaller bearing capacity and rigidity, overlarge pipe curtain deformation and the like in the traditional pipe curtain construction method.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the hollow steel pipe concrete pipe curtain structure is a prefabricated structure and comprises an outer steel pipe and an inner steel pipe which are coaxially arranged, wherein a concrete hollow interlayer is arranged between the outer steel pipe and the outer steel pipe;
the outer wall of the inner steel pipe is separated from the inner wall of the outer steel pipe through a supporting piece.
Further, the supporting piece is a positioning steel bar;
one end of the positioning steel bar is vertically fixed to the outer wall of the inner steel tube, and the other end of the positioning steel bar abuts against the inner wall of the outer steel tube.
Further, the positioning steel bars are uniformly arranged along the through length of the inner steel pipe;
the positioning steel bars are provided with multiple rings along the length direction of the inner steel tube, and each ring comprises at least 4 rings.
Further, the support is a steel sleeve;
the steel sleeve comprises a sleeve and a supporting plate, one end of the supporting plate is vertically fixed to the outer wall of the sleeve, the other end of the supporting plate is vertically fixed to the inner wall of the outer steel pipe, and the inner steel pipe is inserted into the sleeve.
Further, the steel sleeves are provided with 2 steel sleeves, and the steel sleeves are respectively positioned at two ends in the outer steel pipe.
Further, the support plate is provided with at least 4.
Further, the outer steel pipe is a square pipe or a round pipe.
Further, the inner steel pipe is a square pipe or a round pipe.
Compared with the prior art, the utility model has the following beneficial effects:
the pipe curtain structure is a prefabricated double-steel pipe curtain structure, is prefabricated in a processing plant, is transported to site jacking construction, and achieves rapid construction in an assembled and standardized mode. The pipe curtain structure is transported to the site jacking, so that the construction procedure that concrete is required to be poured in the pipe after the traditional pipe curtain steel pipe is jacked is omitted, the construction cost is reduced, and the problem that the concrete in the pipe is difficult to pour compactly after the traditional pipe curtain is jacked is effectively solved.
The pipe curtain structure adopts an inner steel pipe and outer steel pipe form, greatly improves the bearing capacity and rigidity compared with the traditional pipe curtain structure, and is beneficial to preventing the pipe curtain from deforming and the steel pipes from unevenly settling.
According to the pipe curtain structure, concrete is poured between the inner steel pipe and the outer steel pipe to form a hollow structure, so that the dead weight of the pipe curtain structure is effectively reduced, materials are saved, and the hollow space can be used as a later-stage underground pipeline paving. The inner steel pipe is strictly positioned, so that the position of the inner steel pipe is ensured not to move when concrete is poured.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a structural diagram of embodiment 1 of the present utility model.
Fig. 2 is a structural diagram of an inner steel pipe according to example 1 of the present utility model.
Fig. 3 is a structural diagram of embodiment 2 of the present utility model.
Fig. 4 is a structural view of a steel bushing according to embodiment 2 of the present utility model.
FIG. 5 is a front view of the present utility model in section with the outer circle and the inner circle.
Fig. 6 is a front view of the utility model in external and internal cross-section.
FIG. 7 is a front view of the present utility model in outside square and inside circular cross section.
The marks in the figure are as follows:
1-outer steel pipe, 2-inner steel pipe, 3-locating steel bar, 4-concrete hollow interlayer, 5-steel sleeve, 6-sleeve and 7-support plate.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of this patent, it should be understood that the terms "central axis," "longitudinal," "radial," "top," "bottom," "inner," "outer," and the like indicate an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the patent and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the patent.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "disposed," and the like are to be construed broadly and include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
The utility model provides a hollow steel pipe concrete pipe curtain structure which is a prefabricated part of a factory, is integrally processed in the factory, is directly used after being transported to a construction site, and does not need cast-in-situ construction. The prefabricated member is a double-steel pipe curtain and comprises an outer steel pipe 1 and an inner steel pipe 2 which are coaxially arranged, wherein the outer steel pipe 1 and the inner steel pipe 2 can be square pipes or round pipes, the inner cross section and the outer cross section are identical or different, the outer cross section is the outer circle cross section in figure 5, the inner square cross section is the outer square cross section in figure 6, and the inner square cross section is the outer square cross section in figure 7. Of course, other shapes and combinations of cross-sectional forms may be used as desired.
The concrete hollow interlayer 4 is arranged between the outer steel pipe 1 and the inner steel pipe 2, is formed by filling concrete between the outer steel pipe 1 and the outer steel pipe 1 in the factory prefabrication process, can be filled with common concrete or UHPC, and has strength grade selected according to the actual construction condition. Because the inner steel pipe 2 is not filled with concrete and is hollow, the dead weight of the whole structure is greatly reduced, and the concrete consumption is greatly reduced. And because the double-layer steel pipe structure is adopted, the bearing capacity and the rigidity of the whole structure are not affected, but are greatly improved.
The outer wall of the inner steel pipe 2 is spaced from the inner wall of the outer steel pipe 1 through a supporting piece, so that the spacing distance between the outer wall and the inner wall is ensured, and a filling space of concrete is formed. The interval distance between the inner steel pipe 2 and the outer steel pipe 1 can be calculated and adjusted according to different construction requirements. The support may take different forms, such as spacer bars 3 and steel bushings 5.
Example 1:
as shown in fig. 1-2, the support member in the structure is a positioning steel bar 3, one end of the positioning steel bar 3 is vertically fixed to the outer wall of the inner steel tube 2, and the other end of the positioning steel bar is fixed by welding, and the other end of the positioning steel bar abuts against the inner wall of the outer steel tube 1 and is not connected with the outer steel tube 1.
The positioning steel bars 3 are uniformly arranged along the through length of the inner steel pipe 2, and multiple rings are arranged along the length direction of the inner steel pipe 2, and each ring comprises at least 4 rings.
Prefabrication:
the first step: welding the positioning steel bars 3 to the outer wall of the inner steel pipe 2, and uniformly arranging;
and a second step of: fixing the outer steel pipe 1 vertically, and then hoisting the inner steel pipe 2 into the outer steel pipe 1;
and a third step of: filling concrete between the inner steel pipe 2 and the outer steel pipe 1;
fourth step: and (5) finishing prefabrication after the concrete reaches the design strength. The whole structure is transported to a construction site, and is directly jacked in a site appointed position to form a prefabricated double-steel-pipe curtain supporting structure.
Example 2:
as shown in fig. 3 to 4, the supporting member is a steel sleeve 5, the steel sleeve 5 includes a sleeve 6 and a supporting plate 7, one end of the supporting plate 7 is vertically fixed to the outer wall of the sleeve 6, can be fixed by welding, the other end is vertically fixed to the inner wall of the outer steel pipe 1, can be fixed by welding, and the inner steel pipe 2 is inserted into the sleeve 6. The steel sleeve 5 can also play a role in reinforcing the end, and in addition to the two ends, several parts can be additionally arranged at other positions if necessary.
The steel sleeves 5 are arranged at 2 ends respectively positioned in the outer steel pipe 1. The support plate 7 is provided with at least 4.
Prefabrication:
the first step: machining a steel sleeve 3, and welding one end of a supporting plate 7 to the outer wall of a sleeve 6;
secondly, welding the other end of the supporting plate 7 to the inner wall of the outer steel pipe 1, wherein two ends are respectively welded;
and a third step of: inserting the inner steel tube 2 into the sleeve 6, and filling concrete between the inner steel tube 2 and the outer steel tube 1;
fourth step: and (5) prefabricating after the concrete is formed. The whole structure is transported to a construction site, and is directly jacked in a site appointed position to form a prefabricated double-steel-pipe curtain supporting structure.
According to the utility model, the inner steel pipe 2 is arranged in the outer steel pipe 1, and concrete is poured between the inner steel pipe and the outer steel pipe, so that the bearing capacity and the rigidity of the inner steel pipe and the outer steel pipe can be greatly improved, uneven settlement of the ground and the pipe curtain is effectively prevented, and the construction safety in the subsequent pipe curtain module is enhanced. The structure is transported to the site for jacking after being prefabricated in a factory, so that the construction procedure of casting concrete on site can be omitted, and the problem that the concrete on site is difficult to pour compactly is effectively solved. The structure is only poured in the inner interlayer and the outer interlayer, so that the concrete consumption can be reduced, the dead weight of the structure is reduced, and the structure has important engineering practice significance and social and economic benefits.
The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims (8)

1. A hollow steel pipe concrete pipe curtain structure which is characterized in that:
the structure is a prefabricated structure and comprises an outer steel pipe (1) and an inner steel pipe (2) which are coaxially arranged, wherein a concrete hollow interlayer (4) is arranged between the outer steel pipe (1) and the outer steel pipe (1);
the outer wall of the inner steel pipe (2) is separated from the inner wall of the outer steel pipe (1) through a supporting piece.
2. A hollow concrete filled steel tube curtain structure as recited in claim 1, wherein:
the supporting piece is a positioning steel bar (3);
one end of the positioning steel bar (3) is vertically fixed to the outer wall of the inner steel tube (2), and the other end of the positioning steel bar is abutted against the inner wall of the outer steel tube (1).
3. A hollow concrete filled steel tube curtain structure as recited in claim 2, wherein:
the positioning steel bars (3) are uniformly arranged along the whole length of the inner steel pipe (2);
the positioning steel bars (3) are provided with multiple rings along the length direction of the inner steel tube (2), and each ring comprises at least 4 rings.
4. A hollow concrete filled steel tube curtain structure as recited in claim 1, wherein:
the support piece is a steel sleeve (5);
the steel sleeve (5) comprises a sleeve (6) and a supporting plate (7), one end of the supporting plate (7) is vertically fixed to the outer wall of the sleeve (6), the other end of the supporting plate is vertically fixed to the inner wall of the outer steel pipe (1), and the inner steel pipe (2) is inserted into the sleeve (6).
5. A hollow concrete filled steel tube curtain structure as recited in claim 4, wherein:
the steel sleeves (5) are arranged at 2 ends respectively positioned in the outer steel pipe (1).
6. A hollow concrete filled steel tube curtain structure as recited in claim 5, wherein:
the support plates (7) are provided with at least 4.
7. A hollow concrete filled steel tube screen structure according to claim 3 or 6, wherein:
the outer steel pipe (1) is a square pipe or a round pipe.
8. A hollow concrete filled steel tube screen structure according to claim 3 or 6, wherein:
the inner steel pipe (2) is a square pipe or a round pipe.
CN202322186974.0U 2023-08-15 2023-08-15 Hollow steel pipe concrete pipe curtain structure Active CN220599820U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322186974.0U CN220599820U (en) 2023-08-15 2023-08-15 Hollow steel pipe concrete pipe curtain structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322186974.0U CN220599820U (en) 2023-08-15 2023-08-15 Hollow steel pipe concrete pipe curtain structure

Publications (1)

Publication Number Publication Date
CN220599820U true CN220599820U (en) 2024-03-15

Family

ID=90171182

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322186974.0U Active CN220599820U (en) 2023-08-15 2023-08-15 Hollow steel pipe concrete pipe curtain structure

Country Status (1)

Country Link
CN (1) CN220599820U (en)

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