CN213173744U - Combined foundation pit supporting structure - Google Patents
Combined foundation pit supporting structure Download PDFInfo
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- CN213173744U CN213173744U CN202021528790.8U CN202021528790U CN213173744U CN 213173744 U CN213173744 U CN 213173744U CN 202021528790 U CN202021528790 U CN 202021528790U CN 213173744 U CN213173744 U CN 213173744U
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- foundation pit
- splicing block
- connecting rod
- supporting construction
- supporting
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Abstract
The application relates to a combined foundation pit supporting structure, which comprises a supporting layer and a supporting assembly; the supporting layer is formed by connecting a plurality of cast-in-place piles; the supporting component comprises a connecting portion fixedly connected to the cast-in-place pile and a supporting portion used for supporting the connecting portion, the supporting portion comprises a connecting rod and an inclined strut, the upper end face of the inclined strut is provided with an inclined plane, the inclined plane faces towards the connecting portion, one end of the connecting rod is connected with the connecting portion, and the other end of the connecting rod is fixedly connected with the inclined plane. This application has the effect that improves the stability to a fender pile support.
Description
Technical Field
The application relates to the field of construction, especially, relate to a combination foundation ditch supporting construction.
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.
Current excavation supporting supports when using, supports the fender pile through the body of rod usually, and the body of rod is direct pegging graft on ground usually, and nevertheless the body of rod is unstable and easily damaged, therefore also has the space of improvement.
Disclosure of Invention
In order to improve the stability to the fender pile supports, this application provides a combination excavation supporting construction.
A combined foundation pit supporting structure comprises a supporting layer and a supporting assembly;
the supporting layer is formed by connecting a plurality of cast-in-place piles;
the supporting component comprises a connecting portion fixedly connected to the cast-in-place pile and a supporting portion used for supporting the connecting portion, the supporting portion comprises a connecting rod and an inclined strut, the upper end face of the inclined strut is provided with an inclined plane, the inclined plane faces towards the connecting portion, one end of the connecting rod is connected with the connecting portion, the other end of the connecting rod is fixedly connected with the inclined plane, the inclined strut is fixedly installed on the concrete support, and the concrete support is fixedly installed on the ground through bolts.
Through adopting above-mentioned technical scheme, the power transmission of connecting rod is to the bracing, and 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, thereby improve the stability to supporting the layer and supporting.
Preferably, the connecting portion is formed by a plurality of end-to-end splicing blocks, a clamping block extends from one side of each splicing block, and a clamping groove matched with the clamping block of the adjacent splicing block is formed in one side, far away from the clamping block, of each splicing block.
Through adopting above-mentioned technical scheme, when using this combination underground structure, 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 to be difficult for breaking away from the laminating 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, 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.
Preferably, the connecting part is provided with a prestressed anchor cable in a penetrating way, 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 native campshed simultaneously to make whole supporting construction more reliable and stable.
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, the retaining member is a locking bolt, the side wall of the horizontal rod is provided with a strip-shaped through hole penetrating through the sliding groove, and the locking bolt penetrates through the strip-shaped through hole and is in threaded connection with the jacking member.
Through adopting above-mentioned technical scheme, when a position spare cunning move to with pretension nut butt, screw up the locking bolt and will push up the position spare locking in order to realize the locking function.
The inclined plane of the inclined strut is in contact with the connecting rod, so that the contact surface between the connecting rod and the inclined strut is increased, the pressure of the contact surface between the two parts is reduced, and the service lives of the connecting rod and the inclined strut are prolonged;
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 using this excavation supporting structure, splice through joint piece and joint groove cooperation concatenation between the piece, need not one shot forming to be convenient for construct, simultaneously, through joint piece and joint groove cooperation joint between the adjacent piece, make to be difficult for breaking away from the laminating between the adjacent piece.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of a combined foundation pit supporting structure according to the present application.
Fig. 2 is a schematic structural view of a support assembly of an embodiment of a modular underground excavation support structure of 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 present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses combination foundation ditch supporting construction. Referring to fig. 1, a combined supporting structure for an excavation includes a supporting layer 1 and a supporting 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 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. The prestressed anchor cable 225 is used for reinforcing rock mass and improving the stress of the retaining row pile, so that the whole supporting structure is more stable and reliable, and compared with the parallel steel ropes, the mechanical performance of the twisted prestressed anchor cable 225 has more bending resistance.
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 a combination excavation supporting construction of this application embodiment does: when the combined foundation pit supporting structure is used, the force of the connecting rod 221 is transmitted to the inclined strut 222, the inclined surface 2221 of the inclined strut 222 is 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 lives of the connecting rod 221 and the inclined strut 222 are prolonged.
The embodiment of the application also discloses a construction method of the combined foundation pit supporting structure. A construction method of a combined foundation pit supporting structure comprises the following steps:
s1, leveling the field to a designed elevation, excavating a mixing pile construction guide groove and removing obstacles;
s2, constructing the cast-in-situ bored pile 11 according to the construction specification to form a supporting layer 1;
s3, excavating the foundation pit to a half of the depth of the foundation pit, placing a pouring mold to pour the splicing blocks 211 on the supporting layer 1, and excavating the foundation pit to a designed depth;
s4, penetrating the pre-stressed anchor cable 225 through the splicing block 211 and the support layer 1;
s5, constructing a building main body bottom plate at the bottom of the foundation pit, constructing a concrete support 223 on the building main body bottom plate and installing an inclined strut 222;
s6, mounting a horizontal rod 224 on the splicing block 211, fixing the horizontal rod 224 on the splicing block 211 through bolts, and then mounting a top position piece 226 on the horizontal rod 224;
s7, installing a connecting rod 221 between the inclined strut 222 and the horizontal rod 224;
s8, pre-stretching the pre-stressed anchor cable 225;
s9, testing and quality inspection.
By the construction method, the construction of the combined foundation pit supporting structure is realized.
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 (8)
1. The utility model provides a combination excavation supporting construction 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);
support subassembly (2) including fixed connection in connecting portion (21) on bored concrete pile (11) and be used for supporting the portion (22) of strutting of connecting portion (21), it includes connecting rod (221) and bracing (222) to support portion (22), bracing (222) up end is provided with inclined plane (2221), inclined plane (2221) orientation connecting portion (21), connecting rod (221) one end is connected with connecting portion (21), connecting rod (221) other end and inclined plane (2221) fixed connection, bracing (222) fixed mounting is on concrete support (223), concrete support (223) are subaerial through bolt fixed mounting.
2. A modular foundation pit supporting construction according to claim 1, wherein: the connecting portion (21) is formed by a plurality of end-to-end 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 formed in one side, far away from the clamping block (2111), of each splicing block (211).
3. A modular foundation pit supporting construction according to claim 2, wherein: one end, far away from the splicing block (211), of the clamping block (2111) is a bending part.
4. A modular foundation pit supporting construction according to claim 3, 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).
5. A combined foundation pit supporting construction according to claim 4, characterized in that: the connecting part (21) is provided with a pre-stressed anchor cable (225) in a penetrating mode, and the pre-stressed anchor cable (225) is formed by twisting a plurality of steel ropes.
6. A combined foundation pit supporting construction according to claim 5, characterized in that: 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).
7. A combined foundation pit supporting construction according to claim 6, characterized in that: 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. A combined foundation pit supporting construction according to claim 7, characterized in that: 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021528790.8U CN213173744U (en) | 2020-07-28 | 2020-07-28 | Combined foundation pit supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021528790.8U CN213173744U (en) | 2020-07-28 | 2020-07-28 | Combined foundation pit supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213173744U true CN213173744U (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021528790.8U Active CN213173744U (en) | 2020-07-28 | 2020-07-28 | Combined foundation pit supporting structure |
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|---|---|
| CN (1) | CN213173744U (en) |
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- 2020-07-28 CN CN202021528790.8U patent/CN213173744U/en active Active
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