CN212200442U

CN212200442U - Foundation pit support

Info

Publication number: CN212200442U
Application number: CN202020712456.1U
Authority: CN
Inventors: 刁邦宏; 陈军培; 张龙武; 徐志海; 袁兴明; 李跃丰; 高双
Original assignee: Guangdong Yuji Construction Engineering Co ltd
Current assignee: Guangdong Yuji Construction Engineering Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-12-22
Anticipated expiration: 2030-04-30

Abstract

The utility model belongs to the technical field of excavation supporting's technique and specifically relates to an excavation supporting is related to, its technical scheme main points are: the retaining plate is attached to the side wall of the foundation pit, the anchor rod comprises a rod body, an inner anchor head and an anchor seat, the rod body penetrates through the retaining plate and extends into a foundation pit rock stratum, the inner anchor head is connected to one end of the rod body, the anchor seat is connected to the other end of the rod body, the inner anchor head is located in the foundation pit rock stratum, the anchor seat is abutted to the surface of the retaining plate, the foundation pit support further comprises a positioning protection plate and a fixing plate, the positioning protection plate is used for presetting the position of the anchor rod, the fixing plate is used for fixing the positioning protection plate, and a clamping assembly used for clamping; set up the locating hole that a plurality of supplied the stock to pass on the location backplate, the one side laminating of location backplate is in the one side of retaining the breast board back of the body from the foundation ditch lateral wall, the one side that the location backplate deviates from retaining the breast board is contradicted with the anchor block. The utility model discloses the effect that improves the efficiency of construction has.

Description

Foundation pit support

Technical Field

The utility model belongs to the technical field of the technique of excavation supporting and specifically relates to an excavation supporting is related to.

Background

With the rapid advance of the urbanization process in China, the development and utilization of underground space are more and more concerned by people, so that the concept of 'foundation pit engineering' is provided. The foundation pit engineering mainly comprises design and construction of a foundation pit supporting system and earth excavation, and is a system engineering with strong comprehensiveness. The most important is the design and construction of the supporting system. Without a reliable supporting system, the excavation of the foundation pit inevitably affects adjacent buildings or structures, and even causes accidents such as surface collapse and structure collapse in severe cases.

The existing foundation pit support mostly adopts an anchor rod type support structure, specifically, an anchor rod is driven into a hole which is drilled in advance in a foundation pit rock mass, and a special structure of a head part and a rod body and a tail supporting plate (or not needed) are utilized, or surrounding rock and a stable rock mass are combined together by depending on the bonding effect to generate a suspension effect, a combination beam effect and a reinforcing effect so as to achieve the purpose of supporting. The anchor rod type supporting structure has the advantages of low cost, good supporting effect, simple and convenient operation, flexible use, less occupied construction clearance and the like.

Traditional anchor rod formula supporting construction inserts a plurality of stock in the foundation ditch and forms the anchor effect, specifically is that the body of rod one end of stock inserts in the inside rock stratum of foundation ditch, and the rethread anchorage is connected so that anchorage and foundation ditch lateral wall conflict with the other end of the body of rod to fix the body of rod in the inside rock stratum of foundation ditch.

The above prior art solutions have the following drawbacks: when installing a plurality of stock in the foundation ditch lateral wall, operating personnel all need fix a position it every installation stock, not only leads to the efficiency of construction too slow, still can not ensure the location accuracy to influence supporting construction's effect normal play.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a foundation ditch support, its technical problem that solve can carry out prepositioning to the installation of stock to improve the efficiency of construction.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the foundation pit support comprises an anchor rod and a retaining plate, wherein the retaining plate is attached to the side wall of a foundation pit, the anchor rod comprises a rod body, an inner anchor head and an anchor seat, the rod body penetrates through the retaining plate and extends into a foundation pit rock stratum, the inner anchor head is connected to one end of the rod body, the anchor seat is connected to the other end of the rod body, the inner anchor head is located in the foundation pit rock stratum, the anchor seat is abutted against the surface of the retaining plate, the foundation pit support further comprises a positioning protection plate and a fixing plate, the positioning protection plate is used for presetting the position of the anchor rod, and a clamping assembly used for clamping the; set up the locating hole that a plurality of supplied the stock to pass on the location backplate, the one side laminating of location backplate is in the one side of retaining the breast board back of the body from the foundation ditch lateral wall, the one side that the location backplate deviates from retaining the breast board is contradicted with the anchor block.

By adopting the technical scheme, when the anchor rod is installed on the side wall of the foundation pit, the anchor rod is pre-positioned by utilizing the positioning plate with the preset positioning hole, so that the construction efficiency of the foundation pit support can be greatly improved, and the labor force of constructors is saved; in addition, compare with the artificial range estimation location, the mode location of installing the stock through the locating hole of predetermineeing is more accurate.

The present invention may be further configured in a preferred embodiment as: the positioning protection plate comprises a first protection plate and a second protection plate, the first protection plate and the second protection plate are arranged oppositely from top to bottom, the first protection plate and the second protection plate can slide relative to the earth retaining plate, one side of the first protection plate, which is close to the second protection plate, is provided with a plurality of semicircular first grooves, one side of the second protection plate, which is close to the first protection plate, is correspondingly provided with a plurality of semicircular second grooves, and the first grooves and the second grooves are aligned from top to bottom to form the positioning holes.

Through adopting above-mentioned technical scheme, when the stock passed from the locating hole, because first backplate and second backplate can keep off the native board and slide relatively to make the size that the locating hole that is formed by first recess and second recess can be adjusted by the size of stock relatively, be convenient for on-the-spot installation.

The present invention may be further configured in a preferred embodiment as: the centre gripping subassembly includes the grip slipper, the draw-in groove has been seted up to the grip slipper and the relative one side of first backplate, the tip of first backplate and second backplate all is located the draw-in groove, the square groove that communicates with the draw-in groove is seted up to the lateral wall that the draw-in groove opening is relative on the grip slipper, the length direction in square groove is perpendicular with the length direction of first backplate, the equal shaping in both ends of first backplate and second backplate has the square piece with square groove shape looks adaptation, square piece slides with square groove and is connected.

By adopting the technical scheme, the end parts of the first protection plate and the second protection plate are inserted into the clamping grooves, so that the first protection plate and the second protection plate can be fixed at the height position relative to the side wall of the foundation pit; through the cooperation of square groove and square piece for the slip of first backplate and second backplate is more smooth and easy.

The present invention may be further configured in a preferred embodiment as: the clamping assembly further comprises an elastic piece used for enabling the first protection plate and the second protection plate to be close to each other, and the elastic piece is fixedly arranged in the clamping groove.

Through adopting above-mentioned technical scheme, set up the elastic component, can further carry out the centre gripping to first backplate and second backplate fixed, in addition, after first backplate and second backplate cunning, the elastic component enables first backplate and second backplate and is close to each other to guarantee that first backplate and second backplate tightly overlap in the body of rod side of stock.

The present invention may be further configured in a preferred embodiment as: the elastic part is a pressure spring, the pressure spring is fixedly arranged in the clamping groove and is located on two sides, far away from the first protection plate and the second protection plate, of the clamping groove, one end of the pressure spring is fixedly connected with the groove wall of the clamping groove, the other end, close to the first protection plate, of the pressure spring abuts against the first protection plate, and the other end, close to the second protection plate, of the pressure spring abuts against the second protection plate.

Through adopting above-mentioned technical scheme, the pressure spring that is close to first backplate can slide first backplate toward the direction that is close to the second backplate, is close to the second backplate pressure spring and can slide the second backplate toward the direction that is close to first backplate to make the size of locating hole can be according to the cross section size self-adjustment of stock.

The present invention may be further configured in a preferred embodiment as: the side molding that the grip slipper is close to the fixed plate has the dovetail block, the dovetail of shaping and dovetail shape looks adaptation is gone up to the side of fixed plate orientation grip slipper, the dovetail block slides with the dovetail and is connected.

Through adopting above-mentioned technical scheme, utilize the cooperation of dovetail and dovetail piece, realize that the grip slipper can slide for the fixed plate and break away from with first backplate and second backplate to only can slide along the length direction of dovetail, can guarantee the in-process that grip slipper and fixed plate slided relatively, the grip slipper does not break away from with the fixed plate.

The present invention may be further configured in a preferred embodiment as: one side of the second guard plate, which deviates from the soil retaining plate, is provided with a connecting assembly for connecting the first guard plate and the second guard plate.

Through adopting above-mentioned technical scheme, coupling assembling can be connected the first backplate and the second backplate that form a whole of mutual separation to prevent that the second backplate from dropping.

The present invention may be further configured in a preferred embodiment as: coupling assembling includes connecting plate and screw with second backplate articulated, the connecting plate is set up in second backplate and first backplate, the fixed orifices has been seted up on the connecting plate, the screw passes fixed orifices and first backplate fixed connection.

Through adopting above-mentioned technical scheme, set up simultaneously on first backplate and second backplate through the connecting plate articulated with the second backplate, the fastening of connecting plate and first backplate is realized to the rethread screw, and is easy and simple to handle, and connecting plate and screw are common accessories, are convenient for use in the actual job site.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the anchor rod is pre-positioned by utilizing the positioning plate with the preset positioning hole, so that the construction efficiency is improved, and the labor force is saved;

2. the positioning is more accurate by mounting the anchor rod through the preset positioning hole;

3. the size of locating hole can be according to the cross section size self-adjustment of stock, the installation of the stock of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic view of an assembly relationship between a positioning protection plate and a fixing plate according to an embodiment of the present invention.

Reference numerals: 1. a foundation pit; 2. a soil guard plate; 3. an anchor rod; 31. a rod body; 32. an inner anchor head; 33. an anchor block; 34. a nut; 4. positioning the guard plate; 41. a first guard plate; 42. a second guard plate; 5. positioning holes; 51. a first groove; 52. a second groove; 6. a fixing plate; 7. a dovetail groove; 8. a clamping assembly; 81. a clamping seat; 82. a pressure spring; 9. a dovetail block; 10. a card slot; 11. a square groove; 12. a square block; 13. a connecting assembly; 131. a connecting plate; 132. and (4) screws.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a foundation pit 1 is strutted, including laminating in retaining plate 2, stock 3 of 1 lateral wall of foundation pit, be used for predetermineeing location backplate 4 of stock 3 position and be used for the fixed plate 6 of fixed position backplate 4. Keep off native board 2 and the laminating of 1 lateral wall of foundation ditch can prevent the stratum landing of 1 lateral wall of foundation ditch, stock 3 passes and keeps off native board 2 and downward sloping in order to anchor in 1 stratum of foundation ditch, and the horizontal pulling force effect of stock 3 will keep off native board 2 and compress tightly on 1 lateral wall of foundation ditch, and the vertical pulling force effect of stock 3 improves 1 stratum tensile ability of foundation ditch.

Referring to fig. 1 and 2, in this embodiment, a plurality of positioning holes 5 are formed in the positioning protection plate 4 for the anchor rods 3 to pass through, one surface of the positioning protection plate 4 is attached to the surface of the retaining plate 2 departing from the side wall of the foundation pit 1, and the surface of the positioning protection plate 4 departing from the retaining plate 2 is abutted to the anchor seat 33. The positioning guard plate 4 includes a first guard plate 41 and a second guard plate 42, the first guard plate 41 and the second guard plate 42 are disposed opposite to each other in a vertical direction, a plurality of semicircular first grooves 51 are disposed on one side of the first guard plate 41 close to the second guard plate 42, a plurality of semicircular second grooves 52 are disposed on one side of the second guard plate 42 close to the first guard plate 41, and the first grooves 51 and the second grooves 52 are aligned in a vertical direction to form the positioning holes 5.

Referring to fig. 1 and 2, the fixing plate 6 is vertically fixed to the side wall of the foundation pit 1, the fixing plate 6 is located on two sides of the retaining plate 2, a dovetail groove 7 is formed in one surface of the fixing plate 6, which is far away from the side wall of the foundation pit 1, and the length direction of the dovetail groove 7 is perpendicular to that of the fixing plate 6. In addition, a clamping assembly 8 for clamping and positioning the guard plate 4 is arranged on the fixing plate 6. Specifically, the clamping assembly 8 comprises a clamping seat 81, a dovetail block 9 matched with the shape of the dovetail groove 7 is formed on the side surface, close to the fixing plate 6, of the clamping seat 81, and the dovetail block 9 is connected with the dovetail groove 7 in a sliding mode. The holder 81 can slide relative to the fixing plate 6 and can slide away from the fixing plate 6 only in the longitudinal direction of the dovetail groove 7.

Referring to fig. 2, the first cover plate 41 and the second cover plate 42 are slidably movable relative to the soil guard plate 2, and the specific structure will be explained in detail below. Clamping groove 10 has been seted up with the relative one side of first backplate 41 to grip slipper 81, and the tip of first backplate 41 and second backplate 42 all is located clamping groove 10, and square groove 11 with the clamping groove 10 intercommunication is seted up at the relative lateral wall of clamping groove 10 opening to grip slipper 81, and the length direction in square groove 11 is perpendicular with the length direction of first backplate 41. Both ends of aforementioned first backplate 41 and second backplate 42 all the shaping have with square groove 11 shape looks adaptation square piece 12, square piece 12 slides with square groove 11 and is connected to first backplate 41 and second backplate 42 all can follow square groove 11 and the square piece 12 complex track that corresponds and keep off the earth board 2 and slide.

Referring to fig. 2, in addition, the spacing between the first and

second shields

41, 42 is self-adjustable, so that the size of the locating hole 5 is self-adjustable according to the cross-sectional size of the anchor rod 3. The clamping assembly 8 further includes an elastic member, in this embodiment, the elastic member is preferably a compression spring 82, the compression spring 82 is fixedly disposed in the clamping groove 10, at least two compression springs 82 are disposed in each clamping groove 10, and the two compression springs 82 are respectively located at two sides of the first protection plate 41 and the second protection plate 42, which are far away from each other. One end of one of the pressure springs 82 is fixedly connected with a groove wall of the clamping groove 10, the other end of the pressure spring 82 abuts against the first guard plate 41, one end of the other pressure spring 82 is fixedly connected with a groove wall of the clamping groove 10, the other end of the pressure spring 82 abuts against the second guard plate 42, and the two pressure springs 82 are matched together to drive the first guard plate 41 and the second guard plate 42 to slide in a direction close to each other. Referring to fig. 1 and 2, when the anchor rod 3 is installed, the anchor rod 3 passes through the positioning hole 5, and the positioning hole 5 can slide up and down relative to the cross section size of the anchor rod 3 to be self-adjusted, so that the anchor rod 3 can be installed conveniently.

Referring back to fig. 1, the anchor rod 3 includes a rod 31 penetrating through the soil guard plate 2 and extending into the rock of the foundation pit 1, an inner anchor head 32 connected to one end of the rod 31, and an anchor seat 33 connected to the other end of the rod 31, wherein the inner anchor head 32 is located in the rock of the foundation pit 1, and the anchor seat 33 is in contact with the surface of the soil guard plate 2. The rod 31 is fixed to the anchor seat 33 so that the anchor seat 33 transfers the pulling force to the rock of the foundation pit 1 to apply a pre-tightening force to the rod 31, and thus the rod 31 pulls the anchor seat 33 to further press the soil guard plate 2.

Referring to fig. 1, the installation process of the anchor rod 3 specifically includes: the locating hole 5 is passed from the one end that is connected with interior anchor head 32 to the body of rod 31 earlier to insert to foundation ditch 1 rock stratum from boring the slope on retaining plate 2, the other end salient of the body of rod 31 outside the location backplate 4, anchor block 33 embolias the body of rod 31 and contradicts with the location backplate 4, and one side that the anchor block 33 deviates from the location backplate 4 is equipped with fixation nut 34, and body of rod 31 surface has the screw thread, and nut 34 and body of rod 31 threaded connection, thereby realize the fastening of anchor block 33 and the body of rod 31.

Referring to fig. 1 and 2, after the anchor rod 3 is installed, the fixing plate 6 and the clamping assembly 8 need to be removed, the positioning protection plate 4 does not need to be removed, and the positioning protection plate 4 is clamped between the anchor seat 33 and the retaining plate 2 to ensure the fastening of the anchor rod 3 and the retaining plate 2. Before the fixing plate 6 and the clamping assembly 8 are removed, the first protective plate 41 and the second protective plate 42 which are separated from each other need to be connected to form a whole. Specifically, one side of the second protection plate 42, which is away from the soil retaining plate 2, is provided with a connecting assembly 13 for connecting the first protection plate 41 with the second protection plate 42, the connecting assembly 13 includes a connecting plate 131 and a screw 132, which are hinged to the second protection plate 42, the connecting plate 131 is erected on the second protection plate 42 and the first protection plate 41, the connecting plate 131 is provided with a fixing hole (not shown in the figure), and the screw 132 penetrates through the fixing hole to be fixedly connected with the first protection plate 41, so that the first protection plate 41 and the second protection plate 42 are connected to form a whole.

Referring to fig. 1 and 2, the process of removing the fixing plate 6 and the clamping assembly 8 is specifically as follows: firstly, the clamping seat 81 slides along the matched track of the dovetail groove 7 and the dovetail block 9 until the clamping seat 81 is separated from the first protection plate 41 and the second protection plate 42, and then the fixing plate 6 is detached from the foundation pit 1.

The implementation principle of the embodiment is as follows: firstly, fixing a retaining plate 2 on the side wall of a foundation pit 1, fixing plates 6 on two sides of the retaining plate 2, then installing a clamping seat 81 on one fixing plate 6, inserting one end of a first protective plate 41 and one end of a second protective plate 42 into a clamping groove 10 of the clamping seat 81, then installing the clamping seat 81 on the other fixing plate, and simultaneously inserting the other end of the first protective plate 41 and the other end of the second protective plate 42 into the clamping groove 10 of the clamping seat 81;

then, the rod body 31 of the anchor rod 3 passes through a preset positioning hole 5 and is drilled and inserted into the rock stratum of the foundation pit 1, the anchor seat 33 and the rod body 31 are installed and fixed, the side wall of the foundation pit 1 is anchored through the anchor rod 3, in the process of installing the anchor rod 3, because the anchor rod 3 is obliquely inserted, the size of the cross section of the anchor rod 3 can deviate from the size of the positioning hole 5, the positioning hole 5 is formed by the relative matching of a first groove 51 of a first protection plate 41 and a second groove 52 of a second protection plate 42, the first protection plate 41 and the second protection plate 42 can slide up and down relative to the earth-retaining plate 2, therefore, the distance between the first protection plate 41 and the second protection plate 42 can slide up and down according to the size of the cross section of the anchor rod 3, and the pressure spring 82 is arranged in a matching way, so that the distance between the first protection plate 41 and the second protection plate 42 can be self-, then, the connecting plate 131 arranged on the second guard plate 42 is rotatably attached to the first guard plate 41, and screws 132 are screwed, so that the first guard plate 41 and the second guard plate 42 which are separated from each other are connected to form a whole;

and finally, sliding the clamping seat 81 until the clamping seat is separated from the first protection plate 41 and the second protection plate 42, and dismantling the fixing plate 6 to finish the construction of supporting the foundation pit 1.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. Foundation pit support, including stock (3) and fender native board (2), keep off native board (2) and laminate in foundation ditch (1) lateral wall, stock (3) are including passing and keep off native board (2) and stretching into body of rod (31) in foundation ditch (1) stratum, connect in interior anchor head (32) of body of rod (31) one end and connect in anchor block (33) of the body of rod (31) other end, interior anchor head (32) are located foundation ditch (1) stratum, anchor block (33) and fender native board (2) surface are inconsistent, its characterized in that: the foundation pit (1) support also comprises a positioning protection plate (4) used for presetting the position of the anchor rod (3) and a fixing plate (6) used for fixing the positioning protection plate (4), wherein a clamping assembly (8) used for clamping the positioning protection plate (4) is arranged on the fixing plate (6); set up locating hole (5) that a plurality of supplied stock (3) to pass on location backplate (4), the one side of location backplate (4) is laminated in the one side that keeps off native board (2) and deviates from foundation ditch (1) lateral wall, the one side that keeps off native board (2) in location backplate (4) is contradicted with anchor block (33).

2. The foundation pit support of claim 1, wherein: the positioning protection plate (4) comprises a first protection plate (41) and a second protection plate (42), the first protection plate (41) and the second protection plate (42) are arranged up and down oppositely, the first protection plate (41) and the second protection plate (42) can slide relative to the soil retaining plate (2), one side, close to the second protection plate (42), of the first protection plate (41) is provided with a plurality of semicircular first grooves (51), one side, close to the first protection plate (41), of the second protection plate (42) is correspondingly provided with a plurality of semicircular second grooves (52), and the first grooves (51) and the second grooves (52) are aligned up and down to form the positioning holes (5).

3. The foundation pit support of claim 1, wherein: centre gripping subassembly (8) include grip slipper (81), draw-in groove (10) have been seted up with first backplate (41) relative one side in grip slipper (81), the tip of first backplate (41) and second backplate (42) all is located draw-in groove (10), square groove (11) of intercommunication with draw-in groove (10) are seted up to the lateral wall that draw-in groove (10) opening is relative on grip slipper (81), the length direction of square groove (11) is perpendicular with the length direction of first backplate (41), the equal shaping in both ends of first backplate (41) and second backplate (42) has square piece (12) with square groove (11) shape looks adaptation, square piece (12) slide with square groove (11) and are connected.

4. The foundation pit support of claim 1, wherein: the clamping assembly (8) further comprises an elastic piece for enabling the first protection plate (41) and the second protection plate (42) to be close to each other, and the elastic piece is fixed in the clamping groove (10).

5. The foundation pit support of claim 4, wherein: the elastic part is a pressure spring (82), the pressure spring (82) is fixedly arranged in the clamping groove (10) and is positioned on two sides of the first protection plate (41) and the second protection plate (42) which are far away from each other, one end of the pressure spring (82) is fixedly connected with the groove wall of the clamping groove (10), the other end of the pressure spring (82) close to the first protection plate (41) is abutted against the first protection plate (41), and the other end of the pressure spring (82) close to the second protection plate (42) is abutted against the second protection plate (42).

6. The foundation pit support of claim 3, wherein: the side shaping that grip slipper (81) are close to fixed plate (6) has dovetail block (9), dovetail (7) of shaping and dovetail (7) shape looks adaptation are gone up to fixed plate (6) side towards grip slipper (81), dovetail block (9) slide with dovetail (7) and are connected.

7. The foundation pit support of claim 2, wherein: one side of the second guard plate (42) departing from the soil retaining plate (2) is provided with a connecting assembly for connecting the first guard plate (41) and the second guard plate (42).

8. The foundation pit support of claim 7, wherein: connecting assembling (13) include with second backplate (42) articulated connecting plate (131) and screw (132), second backplate (42) and first backplate (41) are set up in connecting plate (131), the fixed orifices has been seted up on connecting plate (131), screw (132) pass fixed orifices and first backplate (41) fixed connection.