CN218880884U

CN218880884U - Prestressed anchorage cable mixing pile foundation pit retaining structure

Info

Publication number: CN218880884U
Application number: CN202223564972.2U
Authority: CN
Inventors: 漓江月; 胡营军
Original assignee: Zhejiang Jiajing Geotechnical Engineering Co ltd
Current assignee: Zhejiang Jiajing Geotechnical Engineering Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-04-18
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a prestressed anchorage cable mixing pile foundation ditch retaining structure, relate to building engineering technical field, including the foundation ditch main part, foundation ditch main part inward flange has been encircleed and has been seted up the filling hole, concreting has been pour in the filling hole, the symmetry is fixed with vertical locating plate and fixed plate on the concreting, be provided with one row of mixing pile main part between locating plate and the fixed plate, mixing pile main part is fixed in on the concreting, mixing pile main part and locating plate, the fixed plate is fixed, and the level runs through there is first tie bolt, the one end that foundation ditch main part middle part was kept away from to first tie bolt is connected with prestressed anchorage cable main part, prestressed anchorage cable main part is connected with the second tie bolt. The utility model discloses, can be applicable to on the weak soil geology, solve prior art's limitation, and compare in traditional stirring column row structure, it is better to the protection effect of foundation ditch, can avoid the pit wall soft collapse of foundation ditch main part, the scheduling problem that caves in, excellent in use effect.

Description

Prestressed anchorage cable mixing pile foundation pit retaining structure

Technical Field

The utility model relates to a building engineering technical field, in particular to prestressed anchorage cable mixing pile foundation ditch retaining structure.

Background

In the foundation construction, a foundation pit is a soil pit excavated at a foundation design position according to the base elevation and the base plane size, and after the foundation pit is excavated, foundation pit supports are arranged at the periphery and the bottom to prevent soil from falling or the foundation pit from collapsing. The deep cement mixing pile is a common structure for foundation pit support, and is formed by forcibly mixing underground soil and cement slurry on site by using materials such as cement as a curing agent through a specific mixing machine to harden the soil into a cement reinforcing body with integrity, water stability, water stopping property and certain strength, so that the strength, the physical and mechanical properties and the deformation modulus of the foundation soil are improved.

At present, in the prior art, a circle of stirring piles is mostly arranged around the inside of a foundation pit for enclosure, and the stirring piles are not suitable for a soft soil layer although having enough strength, so that the formed enclosure is not stable enough, and the problem that the inside of the foundation pit is still possible to partially collapse is caused.

Therefore, the application provides a prestressed anchor cable mixing pile foundation pit support structure to meet the requirements.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a prestressed anchorage cable mixing pile foundation pit retaining structure, can be applicable to the weak soil geology on, solved prior art's limitation, and compare in traditional mixing column row structure, it is better to the protection effect of foundation ditch, can avoid the soft scheduling problem that collapses, the internal collapse of pit wall of foundation ditch main part, excellent in use effect.

In order to achieve the above purpose, the present application provides the following technical solutions: the utility model provides a prestressed anchorage cable mixing pile foundation pit retaining structure, includes the foundation pit main part, foundation pit main part inward flange encircles and has seted up the pouring pit, pour concrete in the pouring pit, the symmetry is fixed with vertical locating plate and fixed plate on the pouring concrete, the locating plate with be provided with one row of mixing pile main part between the fixed plate, the mixing pile main part is fixed in on the pouring concrete, the mixing pile main part with the locating plate the fixed plate is fixed to the level runs through there is first tie bolt, the one end that first tie bolt kept away from foundation pit main part middle part is connected with prestressed anchorage cable main part, prestressed anchorage cable main part is connected with the second tie bolt, the second tie bolt is fixed in the pouring concrete.

As a further preferable scheme, the pit wall of the foundation pit main body is dug outwards and is expanded to be a backfill portion, and the backfill portion is located above the notch of the pouring pit.

As a further preferable scheme, the thickness of the backfill part is half of that of the filling pit, a backfill soil layer is filled in the backfill part, and the backfill soil layer is positioned on the pit wall of the foundation pit main body, the outer side of the positioning plate and in a clamping groove formed between the upper end faces of the poured concrete.

As a further preferable scheme, the horizontal position of the top of the positioning plate is higher than the backfill height of the backfill soil layer and higher than the top end of the pit wall of the foundation pit main body.

As a further preferred scheme, a fastening anchor rod horizontally penetrates through the positioning plate, the mixing pile main body and the top and the bottom of the fixing plate, two ends of the fastening anchor rod respectively penetrate out of the positioning plate and the outer side of the fixing plate, and a fastening nut is installed on the two ends of the fastening anchor rod.

As a further preferable mode, both ends of the fastening anchor rod are configured with screw portions, the screw portions are threadedly mounted with the fastening nuts, and the two fastening nuts respectively abut against the positioning plate and the outer side of the fixing plate.

As a further preferable scheme, two layers of slidable backing plates are arranged in the middle of the fastening anchor rod, and the two layers of the backing plates are respectively clamped between the positioning plate and the mixing pile main body and between the mixing pile main body and the fixing plate.

As a further preferable scheme, one end of the first connecting bolt, which is far away from the prestressed anchor cable main body, penetrates through the middle part of the outer side of the fixing plate, and is fixed with a clamping nut, and the clamping nut is abutted against the outer side of the fixing plate.

To sum up, the utility model discloses a technological effect and advantage:

1. the utility model discloses it is rational in infrastructure, benefit from the cooperation of filling hole and concreting, lay the basis for the firm degree of follow-up enclosure for on this structure can be applicable to the weak soil geology, the limitation of prior art has been solved.

2. The utility model discloses, benefit from the locating plate on the concreting, the cooperation of mixing pile main part and fixed plate, foundation ditch supporting's major structure has been formed, compare in traditional stirring post row structure, it is better to the protection effect of foundation ditch, and cooperate the setting of first connecting bolt and prestressed anchorage cable main part, can be connected with concreting, make the locating plate, the enclosure that mixing pile main part and fixed plate formed can keep the protection to foundation ditch main part hole wall under the effort of prestressed anchorage cable main part, the hole wall that can further avoid the foundation ditch main part collapses, the scheduling problem caves in, excellent in use effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a foundation pit support structure of a prestressed anchor cable mixing pile;

FIG. 2 is a schematic structural diagram of a foundation pit support structure of a prestressed anchor cable mixing pile;

FIG. 3 is a schematic structural diagram of a foundation pit support structure of a prestressed anchor cable mixing pile;

FIG. 4 is a schematic structural diagram of a foundation pit support structure of a prestressed anchor cable mixing pile.

In the figure: 1. a foundation pit main body; 101. filling a pit; 102. a backfill part; 2. pouring concrete; 3. backfilling the soil layer; 4. positioning a plate; 5. stirring the pile main body; 6. a fixing plate; 7. fastening an anchor rod; 701. a threaded portion; 8. fastening a nut; 9. a backing plate; 10. a first connecting bolt; 11. clamping a nut; 12. a pre-stressed anchor cable body; 13. a second connecting bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): referring to fig. 1 and 2, the foundation pit support structure for the prestressed anchor cable mixing pile comprises a foundation pit main body 1, wherein a pouring pit 101 is formed in the inner edge of the foundation pit main body 1 in a surrounding mode, pouring concrete 2 is poured into the pouring pit 101, and vertical positioning plates 4 and a fixing plate 6 are symmetrically fixed on the pouring concrete 2. In specific implementation, the pit wall of the foundation pit main body 1 is firstly dug, the pit wall is expanded to form the backfill part 102, and then the filling pit 101 is formed in a surrounding mode, so that the backfill part 102 can be located above a notch of the filling pit 101, and the pouring concrete 2 can be poured in the filling pit 101 conveniently.

Meanwhile, the thickness of the backfill part 102 is half of that of the filling pit 101, a backfill soil layer 3 is filled in the backfill part 102, the backfill soil layer 3 is positioned on the pit wall of the foundation pit main body 1, the outer side of the positioning plate 4 and the upper end face of the poured concrete 2 to form a clamping groove, the specification of excavation and extension of the backfill part 102 is compensated, and the specification of the foundation pit main body 1 is restored to the original preset specification.

And be provided with one row of mixing pile main part 5 between locating plate 4 and the fixed plate 6, mixing pile main part 5 is fixed in on concreting 2, and locating plate 4, the bottom of mixing pile main part 5 and fixed plate 6 pours with concreting 2 and is the integral type, deuterogamy fig. 3 and fig. 4, locating plate 4, mixing pile main part 5 and fixed plate 6's top and the equal level of bottom run through there is fastening stock 7, the outside of locating plate 4 and fixed plate 6 is worn out respectively to the both ends of fastening stock 7, and structure screw thread portion 701, screw thread portion 701 threaded mounting has fastening nut 8, two fastening nut 8 are the outside of butt locating plate 4 and fixed plate 6 respectively, make fastening stock 7 and fastening nut 8 cooperate with come locating plate 4, mixing pile main part 5 and fixed plate 6 fix into a whole, form foundation ditch supporting's major structure.

Simultaneously, the middle part of fastening stock 7 is provided with two-layer slidable backing plate 9, and two-layer backing plate 9 is by the centre gripping respectively between locating plate 4 and stirring stake main part 5 to and between stirring stake main part 5 and the fixed plate 6, in order to compensate the clearance between locating plate 4, stirring stake main part 5 and the fixed plate 6, make the three hug closely fixedly, leave the clearance between avoiding and warp easily.

The cooperation is shown in the figure 1, mixing pile main part 5 and locating plate 4, fixed plate 6 is fixed, and the level runs through there is first connecting bolt 10, the one end that first connecting bolt 10 kept away from foundation ditch main part 1 middle part is connected with prestressed anchorage cable main part 12, prestressed anchorage cable main part 12 is connected with second connecting bolt 13, second connecting bolt 13 is fixed in concreting 2 in, and the outside middle part of fixed plate 6 is worn out to the one end that prestressed anchorage cable main part 12 was kept away from to first connecting bolt 10, and be fixed with joint nut 11, joint nut 11 and the outside butt of fixed plate 6, make locating plate 4, mixing pile main part 5 and fixed plate 6 are whole to be connected with concreting 2, further consolidate.

During specific implementation, in the whole construction process, the horizontal position of the top of the positioning plate 4 is higher than the backfill height of the backfill soil layer 3 and higher than the top end of the pit wall of the foundation pit main body 1, so that the positioning plate 4 can prevent the soil from rolling back into the foundation pit main body 1.

This practical theory of operation: this prestressed anchorage cable mixing pile foundation ditch envelope, when using, through seting up the filling hole 101 in the bottom of foundation ditch main part 1 to pour concreting 2 in filling hole 101, thereby lay the basis for the firm degree of follow-up enclosure, make this structure can be applicable to the weak soil geology on, solved prior art's limitation.

Simultaneously, through setting up locating plate 4, mixing pile main part 5 and fixed plate 6 on concreting 2 to run through the three through fastening stock 7, cooperate fastening nut 8 and backing plate 9 again to fix the three, formed foundation ditch supporting's major structure, compare in traditional mixing column row structure, it is better to the protection effect of foundation ditch. The positioning plate 4, the mixing pile body 5 and the fixing plate 6 are integrally provided with a first connecting bolt 10 in the middle and connected with the poured concrete 2 through the prestressed anchor cable body 12, so that the enclosure formed by the positioning plate 4, the mixing pile body 5 and the fixing plate 6 can keep protection on the pit wall of the foundation pit body 1 under the acting force of the prestressed anchor cable body 12, the problems of soft collapse, invagination and the like of the pit wall of the foundation pit body 1 can be further avoided, and the use effect is good.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a prestressed anchorage cable mixing pile foundation pit retaining structure, includes foundation pit main part (1), its characterized in that: foundation ditch main part (1) inward flange is encircleed and has been seted up pouring pit (101), pouring concrete (2) have been pour in pouring pit (101), on pouring concrete (2) symmetry be fixed with vertical locating plate (4) and fixed plate (6), locating plate (4) with be provided with one row of mixing pile main part (5) between fixed plate (6), mixing pile main part (5) are fixed in on pouring concrete (2), mixing pile main part (5) with locating plate (4) fixed plate (6) to the level runs through has first connecting bolt (10), first connecting bolt (10) are kept away from the one end at foundation ditch main part (1) middle part is connected with prestressed anchorage cable main part (12), prestressed anchorage cable main part (12) are connected with second connecting bolt (13), second connecting bolt (13) are fixed in pouring concrete (2).

2. The foundation pit support structure for the prestressed anchor cable mixing pile as claimed in claim 1, wherein: the pit wall of the foundation pit main body (1) is dug outwards, and is expanded to be a backfill portion (102), and the backfill portion (102) is located above a notch of the filling pit (101).

3. The foundation pit support structure for the prestressed anchor cable mixing pile as claimed in claim 2, wherein: the thickness of the backfill portion (102) is half of that of the filling pit (101), a backfill soil layer (3) is filled in the backfill portion (102), the backfill soil layer (3) is located on the outer side of the pit wall of the foundation pit main body (1) and the positioning plate (4), and a clamping groove is formed between the upper end faces of the pouring concrete (2).

4. The foundation pit support structure for the prestressed anchor cable mixing pile as claimed in claim 3, wherein: the horizontal position of the top of the positioning plate (4) is higher than the backfill height of the backfill soil layer (3) and higher than the top end of the pit wall of the foundation pit main body (1).

5. The foundation pit support structure for the prestressed anchor cable mixing pile as claimed in claim 1, wherein: the locating plate (4), stirring stake main part (5) and the top and the equal level in bottom of fixed plate (6) are run through and are had fastening stock (7), the both ends of fastening stock (7) are worn out respectively locating plate (4) with the outside of fixed plate (6) to install fastening nut (8).

6. The foundation pit support structure for the prestressed anchor cable mixing pile as claimed in claim 5, wherein: both ends of the fastening anchor rod (7) are respectively provided with a thread part (701), the thread part (701) is provided with the fastening nut (8) in a threaded manner, and the two fastening nuts (8) are respectively abutted against the positioning plate (4) and the outer side of the fixing plate (6).

7. The foundation pit support structure for the prestressed anchor cable mixing pile as claimed in claim 5, wherein: the middle part of the fastening anchor rod (7) is provided with two layers of slidable backing plates (9), the two layers of the backing plates (9) are respectively clamped between the positioning plate (4) and the mixing pile main body (5), and between the mixing pile main body (5) and the fixing plate (6).

8. The foundation pit support structure for the prestressed anchor cable mixing pile as claimed in claim 1, wherein: one end, far away from the prestressed anchor cable main body (12), of the first connecting bolt (10) penetrates out of the middle of the outer side of the fixing plate (6), a clamping nut (11) is fixed to the first connecting bolt, and the clamping nut (11) is abutted to the outer side of the fixing plate (6).