CN218314284U

CN218314284U - Pretensioning tensioning pedestal

Info

Publication number: CN218314284U
Application number: CN202222279100.5U
Authority: CN
Inventors: 周娜娜; 宋千军; 郑鹏; 杨文涛; 蒋超
Original assignee: China Construction Fourth Engineering Bureau Jiangsu Construction Investment Co ltd; Sixth Construction Co Ltd of China Construction Fourth Engineering Division Co Ltd
Current assignee: China Construction Fourth Engineering Bureau Jiangsu Construction Investment Co ltd; Sixth Construction Co Ltd of China Construction Fourth Engineering Division Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2023-01-17
Anticipated expiration: 2032-08-29

Abstract

The invention relates to the field of buildings, and discloses a pretensioning method tensioning pedestal which comprises a frame structure and a table top, wherein the frame structure and the table top are arranged on a foundation, the frame structure comprises anchor posts and rear leg posts which are arranged at intervals and are respectively densely planted in rows, the tops of the anchor posts and the tops of the rear leg posts are respectively connected and fixed through horizontal tie beams, the bottoms of the anchor posts are supported through prefabricated pipe piles which are inserted in the foundation and are densely planted in rows, the rear leg posts are inserted in the foundation, and the table top of the table top is positioned between the anchor posts and the prefabricated pipe piles. The tensioning pedestal has a simple structure and high material recovery rate.

Description

Pretensioning tensioning pedestal

Technical Field

The invention relates to the field of buildings, in particular to a prestressed member or a tensioning platform of a building.

Background

Along with the improvement of living standard, the requirements on the space and span of a building are higher and higher, and the application of the prestress technology is wider and wider. With the development of the assembly type technology, the pretensioning method prestress can be constructed in parallel with the main foundation, does not occupy the total construction period, and is applied more and more in large-span plants. The existing pier-type tensioning pedestal needs to excavate a large amount of earthwork and then carries out steel-concrete structure construction. The pier tensioning platform is stable by balancing external load by the self weight, so that the size is large, most of the foundation is deeply buried in the stratum, and the material recovery rate is low.

And the groove type pedestal is formed by a concrete pressure bar, an upper cross beam, a lower cross beam and a brick slope. The structure has large size, and the concrete structure is abundant and not easy to recover.

And the eccentric pressing column type pedestal is also of a concrete structure, and is large in size and not easy to recover.

Chinese patent application CN20182085342.2 discloses an anchor type detachable tensioning pedestal, which is an anchor counterweight block arranged underground in a frame structure combination manner, and although the frame structure above the pedestal can be reused, earthwork needs to be excavated, and the anchor counterweight block is poured or placed.

Disclosure of Invention

The invention aims to solve the technical problem of providing a pretensioning method tensioning pedestal, which avoids a large amount of earthwork and concrete structures by combining underground piles and columns with a column-beam structure on the ground, and improves the recovery rate of materials while ensuring no increase in volume and stability of the pedestal.

In order to solve the technical problems, the technical scheme provided by the invention is that the pretensioning method tensioning pedestal comprises a frame structure and a table top which are arranged on a foundation, wherein the frame structure comprises anchor columns and rear leg columns which are arranged at intervals and are respectively densely planted in rows, the tops of the anchor columns and the rear leg columns are respectively connected and fixed through horizontal bracing beams, the bottoms of the anchor columns are supported through precast tubular piles which are inserted in the foundation and are densely planted in rows, the rear leg columns are inserted in the foundation, and the table top of the table top is positioned between the anchor columns and the precast tubular piles.

Preferably, the system further comprises a cable-stayed anchoring device, wherein one end of the cable-stayed anchoring device is anchored under the foundation, and the other end of the cable-stayed anchoring device is anchored on the rear leg column.

Preferably, the cable-stayed anchoring device comprises a plurality of obliquely-pulled steel strands tensioned in parallel.

Preferably, inclined holes corresponding to the steel strands one to one are formed in the foundation, an expanded end is arranged at the bottom of each inclined hole, a concrete block is poured into the expanded end of each inclined hole, and one ends of the steel strands extend into the concrete blocks to be fixed.

Preferably, a horizontal support piece is connected to one side, close to the anchor post, of the upper portion of the rear support leg, a mounting plate is connected to the horizontal support piece, and one end of the steel strand penetrates through the mounting plate and is fixed through an anchorage device in a tensioning mode.

Preferably, the horizontal supporting piece comprises two channel steels which are arranged in parallel at an interval from top to bottom, and the mounting plate is connected to the two channel steels; and the steel strand penetrates through the gaps between the two adjacent rear support leg columns and the two channel steels.

Preferably, the platform head is located on the foundation, the platform head is of a step structure, and the anchor posts are arranged on the step surface of the step structure.

According to the pretensioning method tensioning pedestal, the combination mode of underground piling, ground beam column construction and cable-stayed anchoring devices is adopted, and the modes of piling, punching and grouting are adopted for construction, so that a large amount of earthwork and concrete construction is avoided, the stability of the tensioning pedestal is ensured, and the recovery rate of materials is improved; the prestressed steel strand is used as an anchoring device, so that the reverse tensioning acting force of the tensioning pedestal can be further improved, the stability of the tensioning pedestal is improved, and the tensioning pedestal is suitable for large-tonnage prestressed tensioning.

Drawings

FIG. 1 is a cross-sectional view of a simplified structure of the present invention.

Fig. 2 is a perspective sectional view of the structure with the rear anchor structure of the present invention.

Fig. 3 is a schematic sectional view of the structure with the rear anchor structure of the present invention.

Figure 4 is an elevation view of the anchor post of the present invention.

Wherein: the prefabricated pile foundation comprises a foundation A, a prefabricated pipe pile 1, a platform head 2, anchor columns 3, rear supporting leg columns 4, horizontal tie beams 5, horizontal tie beams 6, horizontal tie beams 7, horizontal supporting pieces 8, channel steel 81, mounting plates 9, steel strands 10, inclined holes 11, anchoring pieces 13 and anchoring devices 14.

Detailed Description

With respect to the above technical solutions, preferred embodiments are described in detail with reference to the drawings.

In the detailed description, the terms upper, lower, left, right, front, rear, top, bottom, and the like are used for non-directional orientation and are used only for understanding.

Referring to fig. 1, the tensioning pedestal of the invention comprises a precast tubular pile 1, a platform head 2, anchor columns 3, rear leg columns 4, a horizontal tie beam 5, a horizontal tie beam 6 and a horizontal tie beam 7.

And (3) driving the prefabricated pipe piles 1 to the underground, wherein the prefabricated pipe piles 1 are densely planted in rows. And (3) pouring a platform head 2 on the foundation at the top of the precast tubular pile 1, wherein the platform head 2 is of a concrete structure. And connecting the precast tubular piles 1 into a whole. Anchor posts 3 which are densely planted and arranged are arranged on the platform head 2 along the direction of the precast tubular pile, the anchor posts 3 are made of steel, the anchor posts 3 are used as tensioning ends, and prestressed steel bars are fixed on the anchor posts 3 during tensioning. A row of rear supporting legs 4 are arranged at a certain distance at one side of the anchor post in a close planting arrangement mode, and the lower ends of the rear supporting legs 4 are deeply embedded below the foundation A. The rear leg strut 4 is made of steel. The rear support leg column 4 is connected with the opposite side of the top of the anchor column 3 through the horizontal tie beam 5, the connection mode is that the rear support leg column 4 is connected with the anchor column 3 through the horizontal tie beam 5 in a one-to-one correspondence manner, and the horizontal tie beam 5 is made of steel? The top parts of the rows of rear supporting leg columns 4 are connected into a whole through a horizontal tie beam 6, and the top parts of the rows of anchor columns 3 are connected into a whole through a horizontal tie beam 7. The horizontal tie beams (6, 7) are channel steel. The tensioning pedestal in fig. 1 can be applied to small-tonnage prestress tensioning. When large-tonnage prestress tensioning is required, a cable-stayed anchoring device can be arranged on the basis of the tensioning pedestal shown in the figure 1.

Referring to fig. 2 to 4, a cable-stayed anchor is provided on the rear leg post 4. The cable-stayed anchor device comprises: a horizontal support member 8 is connected to the rear leg strut on the side adjacent to the anchor strut 3. The horizontal support member 8 comprises two channel steels 81 arranged in parallel at intervals, and the two channel steels 81 are provided with mounting plates 9. And one end of each of a plurality of parallel steel stranded wires 10 which are obliquely arranged is fixed on the mounting plate 9, and the other end of each of the plurality of steel stranded wires is fixed under the foundation. On the foundation of a certain distance of rear side of rear landing leg post 4, set up the inclined hole 11 that corresponds with steel strand wires quantity backward, the bottom of inclined hole 11 is the enlarged end, and the biggest internal diameter of the bottom of inclined hole 11 is bigger than inclined hole upper portion internal diameter. The steel strand 10 and the grouting pipe are together deeply inserted into the inclined hole 11 to the enlarged end of the bottom, grouting is carried out on the bottom of the inclined hole 11 through the grouting pipe, one end of the steel strand 10 is deeply inserted into concrete in the enlarged end, then the grouting pipe is withdrawn, and an anchoring piece 13 is formed at the bottom of the inclined hole 11. During construction, one end of the hair anchoring piece 13 is fixed, and then the steel strand is tensioned and anchored on the rear leg column 4.

Holes for the steel strands 10 to pass through are formed in the mounting plate 9 in an interval arrangement mode, and the positions of the holes are located at the gap between the two channel steels 81 and the gap between the two adjacent rear support leg columns. One end of the steel strand 10 passes through a gap between rear leg pillars and a gap between two channel steels and is fixed on the mounting plate 9 in a tensioning state through an anchorage 14.

When large-tonnage prestressing force is tensioned, reverse acting force is provided through the anchor cable, the stability of the tensioning pedestal is maintained, and when the tensioning is released, the releasing tension is transmitted to the anchor cable through the anchor column and is counteracted through the anchor cable.

Claims

1. A pretensioning method tensioning pedestal is characterized by comprising a frame structure and a table top which are arranged on a foundation, wherein the frame structure comprises anchor columns and rear leg columns which are arranged at intervals and are respectively densely planted in rows, the tops of the anchor columns and the tops of the rear leg columns are respectively connected and fixed through horizontal bracing beams, the bottoms of the anchor columns are supported through precast tubular piles which are inserted into the foundation and are densely planted in rows, the rear leg columns are inserted into the foundation, and the table top of the table top is positioned between the anchor columns and the precast tubular piles.

2. A pretensioned tensioning mount according to claim 1 further including a cable stayed anchor anchored at one end to the foundation and at the other end to the rear leg strut.

3. A pretensioned tensioning mount according to claim 2 wherein the cable stayed anchor means comprises a plurality of parallel tensioned diagonal steel strands.

4. The pretensioned tensioning pedestal of claim 3, wherein inclined holes corresponding to the steel strands one to one are formed in the foundation, the bottoms of the inclined holes are enlarged ends, concrete blocks are poured into the enlarged ends of the inclined holes, and one ends of the steel strands extend into the concrete blocks to be fixed.

5. The pretensioned tensioning block of claim 3, wherein a horizontal support member is connected to an upper portion of the rear leg adjacent to the anchor post, a mounting plate is connected to the horizontal support member, and one end of the steel strand is fixed by being tensioned by an anchor after passing through the mounting plate.

6. The pretensioned tensioning mount of claim 5 wherein said horizontal support member includes two spaced parallel channels, said mounting plate being connected to said two channels; and the steel strand penetrates through the gaps between the two adjacent rear supporting leg columns and the two channel steels.

7. The pretensioned tensioning block of claim 1, wherein the head is located on a foundation, the head is of a stepped configuration, and the anchor post is disposed on a step surface of the stepped configuration.