CN213173743U

CN213173743U - Take foundation ditch support of prestressed anchorage cable

Info

Publication number: CN213173743U
Application number: CN202021527181.0U
Authority: CN
Inventors: 刘来俊; 杨铜凡
Original assignee: Guangdong Wanxin Construction Engineering Technology Co ltd
Current assignee: Guangdong Wanxin Construction Engineering Technology Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-05-11
Anticipated expiration: 2030-07-28

Abstract

The application relates to the field of building construction, in particular to a foundation pit support with a prestressed anchor cable, which comprises a support layer and a support assembly; the supporting layer is formed by connecting a plurality of cast-in-place piles; the support assembly comprises a connecting part fixedly connected to the cast-in-place pile and a support part used for supporting the connecting part, the connecting part is formed by a plurality of end-to-end splicing blocks, a prestressed anchor cable penetrates through the connecting part, and the prestressed anchor cable is formed by twisting a plurality of steel ropes. This application has the effect that makes prestressed anchorage cable not fragile.

Description

Take foundation ditch support of prestressed anchorage cable

Technical Field

The application relates to the field of building construction, in particular to a foundation pit support of a prestressed anchor cable.

Background

In building construction, a foundation pit is usually excavated, the foundation pit is an earth pit excavated at a base design position according to the base elevation and the base plane size, and the foundation pit is mainly used for bearing platforms, bridge abutments and foundation expansion construction. The foundation pit support refers to measures of temporary retaining, reinforcing, protecting and underground water controlling adopted for protecting the safety of the construction of an underground main structure and the surrounding environment of the foundation pit.

The existing foundation pit can use the prestressed anchor cable in the using process, the existing prestressed anchor cable is easy to damage in the using process, and therefore, the existing foundation pit has an improved space.

Disclosure of Invention

In order to make the prestressed anchorage cable not fragile, this application provides a take foundation ditch support of prestressed anchorage cable.

The application provides a take excavation supporting of prestressed anchorage cable adopts following technical scheme:

a foundation pit support with a prestressed anchor cable comprises a support layer and a support assembly;

the supporting layer is formed by connecting a plurality of cast-in-place piles;

the support assembly comprises a connecting part fixedly connected to the cast-in-place pile and a support part used for supporting the connecting part, the connecting part is formed by a plurality of end-to-end splicing blocks, a prestressed anchor cable penetrates through the connecting part, and the prestressed anchor cable is formed by twisting a plurality of steel ropes.

Through adopting above-mentioned technical scheme, the prestressed anchorage cable is used for consolidating the rock mass, improves the atress that keeps off the soil campshed simultaneously to make whole supporting construction more reliable and stable, the prestressed anchorage cable passes through a plurality of steel cable transposition formation, makes the prestressed anchorage cable not fragile.

Preferably, one end of the prestressed anchor cable extends out of the splicing block, one end of the prestressed anchor cable extending out of the splicing block is a threaded section, and a pre-tightening nut is connected to the threaded section in a threaded manner.

By adopting the technical scheme, the position of the pre-tightening nut is limited in the construction process, then the pre-tightening nut is rotated, so that the pre-stressed anchor cable moves towards the direction far away from the splicing block, pre-stress is applied to the pre-stressed anchor cable, the pre-stress is used for improving the service performance of the structure, the pre-stress is applied to the supporting structure in advance during construction, the pre-stress can fully or partially offset the tensile stress caused by load during service of the structure, and the structural damage is avoided.

Preferably, the horizontal rod is connected with a jacking piece in a sliding mode, and the jacking piece is used for limiting the pre-tightening nut.

Through adopting above-mentioned technical scheme, set up a position spare, carry on spacingly for the position of pretension nut through pushing up, need not operating personnel and use other instruments to carry on spacingly to pretension nut to simplify construction operation, shorten engineering time.

Preferably, the upper end face of the horizontal rod is provided with a sliding groove, the lower end of the top part is connected with the sliding groove in a sliding manner, and the horizontal rod is provided with a locking part for locking the top part.

Through adopting above-mentioned technical scheme, top position spare slides through sliding groove and horizon bar and is connected.

Preferably, one side of each splicing block extends to form a clamping block, and one side, far away from the clamping block, of each splicing block is provided with a clamping groove matched with the clamping block of the adjacent splicing block.

Through adopting above-mentioned technical scheme, when using this take foundation ditch support of prestressed anchorage cable, splice through joint piece and joint groove cooperation concatenation between the splice, need not one shot forming to be convenient for be under construction, simultaneously, splice through joint piece and joint groove cooperation joint between the adjacent splice, make difficult the laminating that breaks away from between the adjacent splice.

Preferably, one end of the clamping block, which is far away from the splicing block, is a bending part.

Through adopting above-mentioned technical scheme, joint piece one end is bent and is L shape, after the joint between joint piece and the joint groove, is difficult for breaking away from.

Preferably, the supporting part comprises a connecting rod and an inclined strut, an inclined plane is arranged on the upper end face of the inclined strut and faces towards the connecting part, one end of the connecting rod is connected with the connecting part, and the other end of the connecting rod is fixedly connected with the inclined plane.

Through adopting above-mentioned technical scheme, the power transmission of connecting rod to the bracing, the bracing sets up inclined plane and connecting rod contact to make the contact surface increase between connecting rod and the bracing, thereby reduce the pressure of contact surface between two parts, extend the life of connecting rod and bracing.

Preferably, a horizontal rod is arranged on one side, away from the splicing blocks, of the splicing blocks, a rotating ball is arranged at one end, away from the splicing blocks, of the horizontal rod, a rotating ring is arranged at one end, away from the inclined strut, of the connecting rod, and the rotating ball is rotatably embedded in the rotating ring.

By adopting the technical scheme, the angle between the splicing blocks and the connecting rod can be adjusted, and construction is facilitated.

In summary, the present application includes at least one of the following beneficial technical effects:

the prestressed anchor cable is formed by twisting a plurality of steel ropes, so that the prestressed anchor cable is not easy to damage;

when the foundation pit support with the prestressed anchor cable is used, the splicing blocks are spliced in a matched mode through the clamping blocks and the clamping grooves, one-step forming is not needed, construction is facilitated, meanwhile, adjacent splicing blocks are clamped in a matched mode through the clamping blocks and the clamping grooves, and the adjacent splicing blocks are not prone to being separated from attachment;

the bracing sets up the inclined plane and contacts with the connecting rod to make the contact surface increase between connecting rod and the bracing, thereby reduce the pressure of contact surface between two parts, extend the life of connecting rod and bracing.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the foundation pit support with the prestressed anchor cables according to the present application.

Fig. 2 is a schematic structural diagram of a support assembly of an embodiment of the foundation pit support with the prestressed anchor cables according to the present application.

Description of reference numerals: 1. a supporting layer; 11. filling piles; 2. a support assembly; 21. a connecting portion; 211. splicing blocks; 2111. a clamping block; 2112. a clamping groove; 22. a support section; 221. a connecting rod; 2211. a rotating ring; 222. bracing; 2221. an inclined surface; 223. a concrete support; 224. a horizontal bar; 2241. rotating the ball; 2242. a sliding groove; 225. a pre-stressed anchor cable; 2251. pre-tightening the nut; 2252. a threaded segment; 226. a top position member; 2261. a sliding part; 2262. a top-position part; 227. and a locking member.

Detailed Description

The embodiment of the application discloses a foundation pit support with a prestressed anchor cable. Referring to fig. 1, the foundation pit support with the prestressed anchor cables comprises a support layer 1 and a support assembly 2. Wherein, the supporting layer 1 is formed by connecting a plurality of cast-in-place piles 11, and the cast-in-place piles 11 are mutually meshed and connected.

Referring to fig. 1 and 2, specifically, the supporting assembly 2 includes a connecting portion 21 fixedly connected to the cast-in-place pile 11 and a supporting portion 22 for supporting the connecting portion 21, the connecting portion 21 is formed by a plurality of end-to-end connected splicing blocks 211, a clamping block 2111 extends from one side of each splicing block 211, and a clamping groove 2112 matched with the clamping block 2111 of the adjacent splicing block 211 is arranged on one side of each splicing block 211 away from the clamping block 2111. Splice through joint piece 2111 and joint groove 2112 cooperation concatenation between the splice 211, need not one shot forming to be convenient for construct, simultaneously, through joint piece 2111 and joint groove 2112 cooperation joint between the adjacent splice 211, make and be difficult for breaking away from the laminating between the adjacent splice 211.

Referring to fig. 1 and 2, further, one end of the clamping block 2111 away from the splicing block 211 is a bent portion, the clamping block 2111 is L-shaped, and the clamping groove 2112 cooperates with the clamping block 2111 to form an L-shape. One end of the clamping block 2111 is bent to be L-shaped, and after the clamping block 2111 and the clamping groove 2112 are clamped, the clamping block is not easy to separate.

The structure of the retaining portion 22 will be described in detail below. Referring to fig. 1 and 2, the support part 22 includes a connection rod 221 and an inclined strut 222, an inclined surface 2221 is provided on an upper end surface of the inclined strut 222, the inclined surface 2221 faces the connection part 21, one end of the connection rod 221 is connected to the connection part 21, and the other end of the connection rod 221 is fixedly connected to the inclined surface 2221. The force of the connecting rod 221 is transmitted to the inclined strut 222, and the inclined strut 222 is provided with the inclined surface 2221 to be in contact with the connecting rod 221, so that the contact surface between the connecting rod 221 and the inclined strut 222 is increased, the pressure of the contact surface between the two components is reduced, and the service life of the connecting rod 221 and the inclined strut 222 is prolonged.

The inclined strut 222 is fixedly installed on the concrete support 223, and the concrete support 223 is fixedly installed on the ground through bolts. Further, an included angle between the inclined plane 2221 and the horizontal plane may be set to 30 ° to 45 °, when the included angle between the inclined plane 2221 and the horizontal plane is less than 30 °, a component force of the support force of the connecting rod 221 to the inclined strut 222 in the vertical direction is large, so that the concrete support 223 is easily damaged, and meanwhile, a projection distance of the inclined strut 222 on the vertical plane becomes large, a bending moment generated by the same size of the component force of the support layer to the horizontal direction of the connecting rod 221 and the component force of the inclined strut 222 to the horizontal direction of the connecting rod 221 to the inclined strut 222 becomes large, so that the inclined strut 222 is easily damaged; when the inclined surface 2221 forms an angle greater than 45 ° with the horizontal plane, the component force of the supporting force of the connecting rod 221 to the sprag 222 in the horizontal direction is large, so that the connecting rod 221 and the sprag 222 are easily separated, and the angle formed by the inclined surface 2221 and the horizontal plane is selected to be 30 ° to 45 °.

Referring to fig. 1 and 2, a horizontal rod 224 is fixedly connected to a side of the splicing block 211 away from the splicing block 211, a rotating ball 2241 is arranged at one end of the horizontal rod 224 away from the splicing block 211, a rotating ring 2211 is arranged at one end of the connecting rod 221 away from the inclined strut 222, and the rotating ball 2241 is rotatably embedded in the rotating ring 2211. The angle between the splicing block 211 and the connecting rod 221 can be adjusted, and construction is facilitated.

Referring to fig. 1 and 2, the connecting portion 21 is formed by passing a pre-stressed anchor cable 225 through the connecting portion, and the pre-stressed anchor cable 225 is formed by twisting a plurality of steel cables.

With continued reference to fig. 1 and 2, one end of the prestressed anchor cable 225 extends out of the splice 211, one end of the prestressed anchor cable 225 extending out of the splice 211 is a threaded section 2252, and a pre-tightening nut 2251 is threadedly connected to the threaded section 2252. In the construction process, the position of the pre-tightening nut 2251 is limited, then the pre-tightening nut 2251 is rotated to move the pre-stressed anchor cable 225 towards the direction away from the splicing block 211, pre-stress is applied to the pre-stressed anchor cable 225, the pre-stress is to improve the service performance of the structure, compressive stress is applied to the supporting structure in advance during construction, the compressive stress can fully or partially offset tensile stress caused by load during service of the structure, and structural damage is avoided.

Referring to fig. 1 and 2, further, a top member 226 is slidably connected to the horizontal rod 224, and the top member 226 is used for limiting the pre-tightening nut 2251. The position of the pre-tightening nut 2251 is limited by the aid of the jacking piece 226, so that an operator does not need to limit the pre-tightening nut 2251 by using other tools, construction operation is simplified, and construction time is shortened.

Referring to fig. 1 and 2, in the illustrated embodiment, the horizontal bar 224 is provided with a sliding slot 2242 on the upper end surface, the lower end of the jacking member 226 is slidably connected with the sliding slot 2242, the horizontal bar 224 is provided with a locking member 227 for locking the jacking member 226, and the jacking member 226 is slidably connected with the horizontal bar 224 through the sliding slot 2242. The propping member 226 includes a sliding portion 2261 and a propping portion 2262, the sliding portion 2261 is slidably disposed in the sliding groove 2242, the sliding portion 2261 forms the propping portion 2262 toward two parallel rods extending from the sliding portion 2261, the propping portion 2262 is disposed obliquely, and an axis of the rod of the propping portion 2262 is perpendicular to an axial direction of the prestressed anchor cable 225.

Referring to fig. 1 and 2, in this embodiment, the locking member 227 is a locking bolt, a through bar-shaped hole penetrating through the sliding groove 2242 is formed in a side wall of the horizontal rod 224, and the locking bolt penetrates through the through bar-shaped hole and is in threaded connection with the top member 226. When the top member 226 slides into abutment with the pre-tightening nut 2251, tightening the locking bolt locks the top member 226 for a locking function.

The implementation principle of the foundation pit support with the prestressed anchor cables in the embodiment of the application is as follows: when the foundation pit support with the prestressed anchor cables is used, the prestressed anchor cables 225 are used for reinforcing rock mass and improving the stress of retaining row piles, so that the whole support structure is more stable and reliable, the mechanical performance of the twisted prestressed anchor cables 225 is compared with that of parallel steel ropes, and the prestressed anchor cables 225 have more bending resistance.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a take foundation ditch support of prestressed anchorage cable which characterized in that: comprises a supporting layer (1) and a supporting component (2);

the supporting layer (1) is formed by connecting a plurality of cast-in-place piles (11);

the supporting assembly (2) comprises a connecting part (21) fixedly connected to the cast-in-place pile (11) and a supporting part (22) used for supporting the connecting part (21), the connecting part (21) is formed by a plurality of end-to-end splicing blocks (211), a prestressed anchor cable (225) is arranged in the splicing blocks (211) in a penetrating mode, and the prestressed anchor cable (225) is formed by twisting a plurality of steel cables.

2. The foundation pit support with the prestressed anchor cables of claim 1, wherein: one end of the prestressed anchor cable (225) extends out of the splicing block (211), one end of the prestressed anchor cable (225) extending out of the splicing block (211) is a threaded section (2252), and a pre-tightening nut (2251) is in threaded connection with the threaded section (2252).

3. The foundation pit support with the prestressed anchor cables of claim 2, wherein: one side of each splicing block (211) extends to form a clamping block (2111), and one side, far away from the clamping block (2111), of each splicing block (211) is provided with a clamping groove (2112) matched with the clamping block (2111) of the adjacent splicing block (211).

4. The foundation pit support with the prestressed anchor cables of claim 3, wherein: one end, far away from the splicing block (211), of the clamping block (2111) is a bending part.

5. The foundation pit support with the prestressed anchor cables of claim 4, wherein: the supporting part (22) comprises a connecting rod (221) and an inclined strut (222), an inclined surface (2221) is arranged on the upper end surface of the inclined strut (222), the inclined surface (2221) faces the connecting part (21), one end of the connecting rod (221) is connected with the connecting part (21), and the other end of the connecting rod (221) is fixedly connected with the inclined surface (2221).

6. The foundation pit support with the prestressed anchor cables of claim 5, wherein: one side of the splicing block (211) far away from the splicing block (211) is provided with a horizontal rod (224), one end of the horizontal rod (224) far away from the splicing block (211) is provided with a rotating ball (2241), one end of the connecting rod (221) far away from the inclined strut (222) is provided with a rotating ring (2211), and the rotating ball (2241) is rotatably embedded in the rotating ring (2211).

7. The foundation pit support with the prestressed anchor cable of claim 6, wherein: the horizontal rod (224) is connected with a jacking piece (226) in a sliding mode, and the jacking piece (226) is used for limiting the pre-tightening nut (2251).

8. The underground excavation support with the prestressed anchor cables of claim 7, wherein: horizontal pole (224) up end is opened there is groove (2242) that slides, top position spare (226) lower extreme with the groove (2242) that slides is connected, be provided with the locking on horizontal pole (224) retaining member (227) of top position spare (226).

9. The underground excavation support with the prestressed anchor cables of claim 8, wherein: retaining member (227) are locking bolt, level bar (224) lateral wall be provided with the bar through-hole that slides groove (2242) and run through, locking bolt runs through the bar through-hole with top position piece (226) threaded connection.