CN110761295A - Prefabricated assembled concrete pipe props structure - Google Patents

Abstract

The invention belongs to the technical field of foundation pit engineering, in particular to a prefabricated concrete pipe support structure, comprising two enclosure structures and a concrete pipe support; one end of the concrete pipe support is fixedly connected to one of the enclosure structures, and the other end It is supported on another enclosure structure by a pre-stressing device; the concrete pipe support comprises several sections of precast concrete pipes, and two adjacent sections of precast concrete pipes are detachably connected. In the prefabricated prefabricated concrete tube support structure provided by the present invention, the concrete tube support is prefabricated in a factory with multiple sections of prefabricated concrete tubes, transported to the site and then erected in the foundation pit project after completion of assembly, so that the concrete tube support has greater rigidity; One end is fixed with the enclosure structure, and the other end is supported on the other enclosure structure through a pre-stressing device, which can quickly form a supporting force and control the deformation of the foundation pit quickly and for a long time; in addition, the precast concrete pipe can also be recycled.

Description

A prefabricated concrete tube support structure

technical field

The invention belongs to the technical field of foundation pit engineering, and in particular relates to a prefabricated assembled concrete pipe support structure.

Background technique

Cast-in-place reinforced concrete support and steel support are commonly used support structures in foundation pit engineering, and the two support structures have their own advantages and disadvantages. The cast-in-place reinforced concrete supports have the advantages of high specific rigidity, strong deformation resistance and good integrity, but it requires on-site formwork pouring, the construction time is long, the strength formation takes a long time, the deformation of the foundation pit cannot be quickly controlled, and it cannot be recycled. Cause a large project waste. The steel support is a prefabricated steel pipe, the construction speed is fast, the support force can be formed quickly, and it can be recycled and can quickly control the deformation of the foundation pit, but the rigidity is low and the deformation resistance is poor. Therefore, it is necessary to design a prefabricated concrete tube support structure to overcome the above problems.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a prefabricated concrete tube support structure, which has a relatively high rigidity and can quickly form a supporting force.

In order to achieve the above purpose, the technical solution of the present invention is a prefabricated concrete pipe support structure, comprising two enclosure structures and a concrete pipe support; one end of the concrete pipe support is fixedly connected to one of the enclosure structures, and the other end is It is supported on another enclosure structure by a prestressing device; the concrete pipe support comprises several sections of precast concrete pipes, and two adjacent sections of precast concrete pipes are detachably connected.

Further, both ends of each section of the precast concrete pipe are provided with end steel plates, and the end steel plates on the adjacent two sections of the precast concrete pipes are connected by bolts.

Further, the end steel plate has an edge portion, the edge portion protrudes from the outer edge of the precast concrete pipe, and the edge portion is provided with a bolt hole for the bolt to pass through.

Furthermore, two adjacent sections of the precast concrete pipes are connected by a plurality of bolts, and the plurality of bolts are arranged at intervals along the circumference of the precast concrete pipes.

Furthermore, a pre-embedded steel plate is pre-embedded on the enclosure structure, and the concrete pipe support is connected to the pre-embedded steel plate by welding through the end steel plate.

Further, each section of precast concrete pipe is provided with a steel cage skeleton, the steel cage skeleton includes a plurality of main bars and a plurality of stirrups, and the plurality of stirrups are arranged at intervals along the length direction of the precast concrete pipe, and the plurality of main bars are arranged along the length of the precast concrete pipe. The inner circle of the stirrups is distributed and extends along the length direction of the prefabricated concrete pipe, and the main bars are connected with the stirrups to form the steel cage skeleton.

Further, both ends of the concrete tube support are also provided with anti-falling steel cables, one end of the anti-falling steel cables is fixed with the concrete tube support, and the other end is located on the concrete tube support with the enclosure structure. The upper position is fixed connection.

Compared with the prior art, the present invention has the following beneficial effects:

(1) In the prefabricated concrete tube support structure provided by the present invention, the concrete tube support is prefabricated in a factory with multiple sections of prefabricated concrete tubes and transported to the site to be assembled and erected in the foundation pit project, which has greater rigidity; and the concrete One end of the pipe support is fixed with the enclosure structure, and the other end is supported on the other enclosure structure through the pre-stressing device, which can quickly form a supporting force and control the deformation of the foundation pit quickly and for a long time;

(2) The prefabricated concrete tube support structure provided by the present invention can be recycled and the construction progress is fast, which solves a series of problems of traditional cast-in-place concrete support and steel support.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is a schematic diagram of a prefabricated concrete pipe support structure provided by an embodiment of the present invention;

2 is a schematic diagram of a prefabricated concrete tube support structure provided by an embodiment of the present invention;

Fig. 3 is the C-C sectional view of Fig. 2;

Fig. 4 is the D-D sectional view of Fig. 2;

Fig. 5 is the schematic diagram at A place in Fig. 1;

Fig. 6 is the schematic diagram at B in Fig. 1;

In the picture: 1. Concrete pipe support, 2. Enclosure structure, 3. Bolts, 4. Concrete structure, 5. Main reinforcement, 6. Stirrup, 7. End steel plate, 8. Pre-embedded steel plate, 9. Pre-stressing device, 10, anti-fall steel cable.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined with "first" and "second" may expressly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

As shown in FIGS. 1-6 , an embodiment of the present invention provides a prefabricated concrete pipe support structure, including two enclosure structures 2 and a concrete pipe support 1 ; one end of the concrete pipe support 1 is connected to one of the enclosures The structure 2 is fixedly connected, and the other end is supported on another enclosure structure 2 through a prestressing device 9; the concrete pipe support 1 includes several sections of precast concrete pipes, and two adjacent sections of precast concrete pipes are detachably connected. In the prefabricated concrete tube support structure provided by the present invention, the concrete tube support 1 has greater rigidity by prefabricating multi-section prefabricated concrete tubes in a factory and transporting it to the site for assembling and erecting in the foundation pit project; and the concrete tube support One end of 1 is fixed with the enclosure structure 2, and the other end is supported on the other enclosure structure 2 through the pre-stressing device 9, which can quickly form a supporting force and control the deformation of the foundation pit quickly and for a long time; The precast concrete pipes are detachably connected, so the construction progress is fast, and the precast concrete pipes can be recycled and reused.

Further, both ends of each section of the precast concrete pipe are provided with end steel plates 7 , and the end steel plates 7 adjacent to each other on two adjacent sections of the precast concrete pipes are connected by bolts 3 . Preferably, the end steel plate 7 has an edge portion, the edge portion protrudes from the outer edge of the precast concrete pipe, and the edge portion is provided with a bolt 3 hole for the bolt 3 to pass through. As shown in Figures 2 and 4, the part where the outer edge of the end steel plates 7 at both ends of each precast concrete pipe protrudes from the outer edge of the precast concrete pipe is the edge part, and the edge part is provided with 3 holes for bolts. Through the bolts 3 passing through the holes of the bolts 3, the end steel plates 7 of the adjacent two sections of the precast concrete pipes can be assembled and formed at the construction site, which can effectively speed up the construction progress; The concrete pipe support 1 itself can be disassembled by taking it out from the holes of the bolt 3, and the disassembled concrete pipe support 1 can also be recycled.

Further, two adjacent sections of the precast concrete pipes are connected by a plurality of bolts 3, and the plurality of bolts 3 are arranged at intervals along the circumference of the precast concrete pipes. As shown in FIG. 4 , a plurality of bolts 3 are evenly arranged along the circumference of the precast concrete pipe, so as to realize the connection and length of the precast concrete pipe and improve the safety of foundation pit construction.

Furthermore, a pre-embedded steel plate 8 is pre-embedded on the enclosure structure 2 , and the concrete pipe support 1 is connected to the pre-embedded steel plate 8 by welding through the end steel plate 7 . As shown in FIG. 6 , the connection between the concrete pipe support 1 and the enclosure structure 2 is realized by welding the embedded steel plate 8 to the end steel plate 7 near the end of the precast concrete pipe of the enclosure structure 2 .

Further, each section of precast concrete pipe is provided with a steel cage skeleton, and the steel cage skeleton includes a plurality of main bars 5 and a plurality of stirrups 6, and the plurality of stirrups 6 are arranged at intervals along the length direction of the precast concrete pipe, and many The root main bars 5 are distributed along the inner circle of the stirrups 6 and extend along the length direction of the precast concrete pipe. The main bars 5 are connected with the stirrups 6 to form the steel cage skeleton, as shown in FIG. 3 . The quantity of the main bars 5 and the stirrups 6 in this embodiment is determined according to the specific length, diameter and strength requirements of each section of the precast concrete pipe, and the steel cage frame can also adopt other forms.

Further, both ends of the concrete pipe support 1 are also provided with anti-falling wire ropes 10 , one end of the anti-falling wire rope 10 is fixed with the concrete pipe support 1 , and the other end is located on the enclosure structure 2 . The position above the concrete pipe support 1 is fixedly connected. As shown in FIGS. 5 and 6 , one end of the anti-falling wire 10 is wound and fixed on the concrete pipe support 1 , and the other end is fixedly connected to the enclosure structure 2 above the concrete pipe support 1 to further improve the safety of foundation pit construction.

The pre-stressing device 9 in this embodiment can be in the form of a jack. The jack is placed between the end of the concrete pipe support 1 and the enclosure structure 2, and the base end and the working end of the jack are respectively against the enclosure structure. 2 and on the concrete pipe support 1, by controlling the elongation of the working end of the jack, the concrete pipe support 1 is supported on the enclosure structures on both sides to form a supporting force, which effectively controls the deformation of the foundation pit and facilitates the underground structure between the enclosure structures. construction.

The prefabricated concrete tube support structure of the present invention is suitable for foundation pit engineering, such as the construction of an underground station. According to the depth of the underground station, usually multiple inner supports need to be arranged in the depth direction of the foundation pit. One support can cast both ends of the concrete tube support in the crown beam, and the second and subsequent supports can be erected according to the prefabricated concrete tube support structure of the present invention; The prefabricated concrete tube support structure of the present invention can also be used for erection; the prefabricated concrete tube support structure of the present invention has greater rigidity, effectively controls the deformation of the foundation pit, and at the same time can quickly form a supporting force and speed up the construction progress. .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (7)

1. The utility model provides a prefabricated assembled concrete pipe props structure which characterized in that: the concrete pipe support comprises two building envelopes and a concrete pipe support; one end of the concrete pipe support is fixedly connected with one of the building enclosures, and the other end of the concrete pipe support is supported on the other building enclosure through a pre-stressing device; the concrete pipe props includes a plurality of sections precast concrete pipe, and can dismantle the connection between two sections adjacent precast concrete pipe.

2. A precast assembled concrete pipe support structure as set forth in claim 1, wherein: and end steel plates are arranged at two ends of each section of the precast concrete pipe, and the end steel plates close to each other on the adjacent two sections of the precast concrete pipes are connected through bolts.

3. A precast assembled concrete pipe support structure as set forth in claim 2, wherein: the end steel plate is provided with an edge part which protrudes out of the outer edge of the precast concrete pipe, and the edge part is provided with bolt holes for the bolts to pass through.

4. A precast assembled concrete pipe support structure as set forth in claim 3, wherein: two adjacent sections of precast concrete pipes are connected through a plurality of bolts, and the plurality of bolts are arranged at intervals along the circumferential direction of the precast concrete pipes.

5. A precast assembled concrete pipe support structure as set forth in claim 2, wherein: the concrete pipe support is connected with the embedded steel plate through welding through an end steel plate.

6. A precast assembled concrete pipe support structure as set forth in claim 1, wherein: every section of precast concrete all is equipped with steel reinforcement cage skeleton in the pipe, steel reinforcement cage skeleton includes many main muscle and many stirrups, and many stirrups are followed the length direction interval of precast concrete pipe sets up, and many main muscle are followed the inner circle of stirrup distributes and extends along the length direction of precast concrete pipe, main muscle is connected with the stirrup and is formed steel reinforcement cage skeleton.

7. A precast assembled concrete pipe support structure as set forth in claim 1, wherein: the two ends of the concrete pipe support are also provided with anti-falling steel cables, one end of each anti-falling steel cable is fixed with the concrete pipe support, and the other end of each anti-falling steel cable is fixedly connected with the position, above the concrete pipe support, of the enclosure structure.

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