CN215331892U

CN215331892U - Safety support frame for building site

Info

Publication number: CN215331892U
Application number: CN202120421725.3U
Authority: CN
Inventors: 林泽阳; 王京华; 林小云; 张梦捷
Original assignee: Zhongneng Xiamen Intelligent Technology Co ltd
Current assignee: Zhongneng Xiamen Intelligent Technology Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2021-12-28
Anticipated expiration: 2031-02-25

Abstract

The utility model discloses a safety support for a construction site, wherein one side of a second U-shaped support is hinged to the other side of a first U-shaped support, a detachable connecting mechanism for fixing the second U-shaped support on the first U-shaped support is arranged at the hinged position of the first U-shaped support and the second U-shaped support, and a first protection column and a second protection column are respectively arranged on the first U-shaped support and the second U-shaped support; the pile body is provided with a lifting adjusting mechanism, the pile body enables the height of the second embedded cast-in-place pile to be adjusted through the lifting adjusting mechanism, the first embedded cast-in-place pile is the same as the second embedded cast-in-place pile, one side of the first embedded cast-in-place pile is connected with a first U-shaped support frame at one stage, and the other side of the second embedded cast-in-place pile is connected with a second U-shaped support frame at the next stage. This safety support for building site has the simple operation nature, improves the advantage of installation effectiveness.

Description

Safety support frame for building site

Technical Field

The utility model relates to the field of building equipment, in particular to a safety support frame for a building site.

Background

Pre-burying is in decoration design: the support is a retaining, reinforcing and protecting measure adopted for the side wall and the surrounding environment in order to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit.

In the prior art, a high-safety supporting device for a construction site, as disclosed in chinese patent CN212223894U, includes a first U-shaped supporting frame and a second U-shaped supporting frame, wherein a first spreading block is disposed on an upper portion of one side of the first U-shaped supporting frame, a second spreading block is disposed on a lower portion of one side of the first U-shaped supporting frame, a first pre-embedded cast-in-place pile is connected to a lower end of the second spreading block, a third spreading block is disposed on an upper portion of the other side of the second U-shaped supporting frame, a fourth spreading block is disposed on a lower portion of the other side of the second U-shaped supporting frame, a second pre-embedded cast-in-place pile is disposed on a lower end of the fourth spreading block, the second pre-embedded cast-in-place pile is composed of a pile body, a pile hole, a flow hole, a first connecting block, a second connecting block, a first connecting hole and a second connecting hole, a pile hole is disposed on an upper portion of a side wall of the pile body, the first connecting block and the second connecting block are disposed on an upper portion of a side wall of the pile body, the upper end of the first connecting block is provided with a first connecting hole, the upper end of the second connecting block is provided with a second connecting hole, a fourth spreading block arranged on the side wall of the second U-shaped support frame is matched with the second connecting block and is connected with the second connecting block through a bolt, the other side of the first U-shaped support frame is provided with a first butt block, the front end of the first butt block is provided with a first connecting hole, one side of the second U-shaped support frame is provided with a second butt block 1, the front end of the second butt block is provided with a second connecting hole, the second butt block is inserted into the first butt block and is connected with the first butt block through a bolt, one side of the first pre-buried cast pile is connected with the first U-shaped support frame, the other side of the second pre-buried cast pile is connected with the next U-shaped support frame, the upper end of the second U-shaped support frame is provided with a jack, and a guard post is inserted into the jack, and the upper end and the lower end of the guard post are provided with a first nut and a second nut.

The fixing performance of the joint of the support frame is enhanced to a certain extent by the prior art, and the safety of the support device is improved. However, in the process of connection and installation, multiple alignment and insertion operations are required, so that the problems of complex operation, inconvenient operation and low installation efficiency exist; and if the ground is uneven, when the embedded heights of the first embedded cast-in-place pile and the second embedded cast-in-place pile are inconsistent, after the first U-shaped support frame is connected with the first embedded cast-in-place pile and the second U-shaped support frame is connected with the second embedded cast-in-place pile, the first butt-joint block on the first U-shaped support frame and the second butt-joint block on the second U-shaped support frame are likely to be difficult to align, and then the first U-shaped support frame and the second U-shaped support frame are difficult to connect.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a safety support frame for a construction site, which at least effectively solves the problems that in the prior art, multiple alignment and insertion operations are required in the connection and installation process, the operation is complicated, the operation is inconvenient, and the installation efficiency is low; and if the ground is uneven, when the embedded heights of the first embedded cast-in-place pile and the second embedded cast-in-place pile are inconsistent, after the first U-shaped support frame is connected with the first embedded cast-in-place pile and the second U-shaped support frame is connected with the second embedded cast-in-place pile, the first butt-joint block on the first U-shaped support frame and the second butt-joint block on the second U-shaped support frame are likely to be aligned difficultly, and then the first U-shaped support frame and the second U-shaped support frame are difficult to connect.

(II) technical scheme

In order to solve the technical problems, the utility model provides the following technical scheme: a safety support for construction sites comprises a first U-shaped support and a second U-shaped support, wherein a first spreading block is arranged on the upper portion of one side of the first U-shaped support, a second spreading block is arranged on the lower portion of one side of the first U-shaped support, a first pre-buried cast-in-place pile is connected to the lower end of the second spreading block, a third spreading block is arranged on the upper portion of the other side of the second U-shaped support, a fourth spreading block is arranged on the lower portion of the other side of the second U-shaped support, a second pre-buried cast-in-place pile is arranged on the lower end of the fourth spreading block, the second pre-buried cast-in-place pile is composed of a pile body, a pile hole, a flow hole, a first connecting block, a second connecting block, a first connecting hole and a second connecting hole, the upper end of the pile body is provided with the pile hole, the upper portion of the side wall of the pile body is provided with the first connecting block and the second connecting hole, the upper end of the first connecting block is provided with the first connecting hole, a second connecting hole is formed in the upper end of the second connecting block, a fourth unfolding block arranged on the side wall of the second U-shaped support frame is matched with the second connecting block, the fourth unfolding block is connected with the second connecting block through a bolt, one side of the second U-shaped support frame is hinged to the other side of the first U-shaped support frame, a detachable connecting mechanism used for fixing the second U-shaped support frame on the first U-shaped support frame is arranged at the hinged position of the first U-shaped support frame and the second U-shaped support frame, when the second U-shaped support frame is fixed on the first U-shaped support frame, the first U-shaped support frame and the second U-shaped support frame are unfolded mutually and are positioned at the same horizontal position, and a first protective column and a second protective column are arranged on the first U-shaped support frame and the second U-shaped support frame respectively; the pile body is provided with a lifting adjusting mechanism, the pile body enables the height of the second pre-buried cast-in-place pile to be adjusted through the lifting adjusting mechanism, the first pre-buried cast-in-place pile is the same as the second pre-buried cast-in-place pile, one side of the first pre-buried cast-in-place pile is connected with a first U-shaped supporting frame of the upper stage, and the other side of the second pre-buried cast-in-place pile is connected with a second U-shaped supporting frame of the lower stage.

According to the arrangement, the first U-shaped support frame and the second U-shaped support frame are unfolded, and the first U-shaped support frame and the second U-shaped support frame are fixedly connected through the detachable connecting mechanism, so that the aligning and inserting operation between the first U-shaped support frame and the second U-shaped support frame is reduced, and the operation convenience and the installation efficiency are improved to a certain extent; and the height adjustment of the first embedded cast-in-place pile and the second embedded cast-in-place pile is realized through the lifting adjusting mechanism respectively, so that the first embedded cast-in-place pile and the second embedded cast-in-place pile can adapt to the heights of the first U-shaped support frame and the second U-shaped support frame through the height adjustment even on the ground with different heights, the installation and the connection are facilitated, and the applicability of the safety support frame is further improved.

The U-shaped support frame is characterized in that a rotating shaft is arranged between the upper portion and the lower portion of the other side of the first U-shaped support frame, the second U-shaped support frame is hinged to the first U-shaped support frame through the rotating shaft, the detachable connecting mechanism comprises a first butt joint hole penetrating through the first U-shaped support frame, a second butt joint hole penetrating through the second U-shaped support frame, a butt joint bolt inserted into the first butt joint hole and the second butt joint hole simultaneously, and a butt joint nut matched with the butt joint bolt.

So set up, through the rotation of second U type support, make the second butt joint hole on the second U type support align with the first butt joint hole on the first U type support, then realize fixed connection through butt bolt and butt joint nut, have operation direction, firm in connection's benefit.

The U-shaped support frame is characterized in that a baffle extends from the other side of the first U-shaped support frame to the direction of the second U-shaped support frame, and when the butt joint bolt is simultaneously inserted into the first butt joint hole and the second butt joint hole, one side of the second U-shaped support frame abuts against the baffle.

So set up, can realize the alignment operation of first butt joint hole and second butt joint hole through the baffle fast conveniently, and then improve the installation effectiveness.

The first protection column is detachably connected to the first U-shaped support frame, the second protection column is fixedly connected to the second U-shaped support frame, and the second U-shaped support frame can be rotatably folded into the first U-shaped support frame.

So set up, can demolish first pillar, then rotate second U type support and fold in first U type support, can effectively reduce the volume of safe support to accomodate and transport of safe support.

The upper end of the first U-shaped support frame is provided with a jack in a penetrating way, the lower end of the first U-shaped support frame is provided with a thread groove, the upper end of the first guard post is a first thread end, and the lower end of the first guard post is a second thread end matched with the thread groove; the upper end of the first protective column is inserted into the jack and fixed through a nut, and the lower end of the first protective column is in threaded connection with the thread groove through a second threaded end, so that the first protective column is detachably connected with the first U-shaped support frame.

So set up, reduced the use of nut, avoided losing of nut to a certain extent, cause the increase of cost, and adopt such connected mode to have convenient operation, firm in connection's benefit can further improve the installation effectiveness.

Further setting up, the pile body is including last pile body and lower pile body that from top to bottom sets gradually, it is third screw thread end to go up the pile body lower extreme, be equipped with down in the pile body with the helicitic texture of third screw thread end adaptation, go up the pile body with the pile body passes through down the third screw thread end with helicitic texture's threaded connection forms lift adjustment mechanism, first connecting block with the second connecting block is all located on the last pile body, go up the pile body with the pile body lateral wall has all opened down the discharge orifice, the stake hole runs through simultaneously go up the pile body with lower pile body, just the stake hole with the discharge orifice intercommunication.

So set up, through the threaded connection of last pile body and lower pile body for first pre-buried bored concrete pile and the pre-buried bored concrete pile altitude mixture control of second are convenient, and the steadiness after adjusting is good.

(III) advantageous effects

Compared with the prior art, the safety support frame for the construction site provided by the utility model has the following beneficial effects:

the safety support for the building site can unfold the first U-shaped support and the second U-shaped support, and realize the fixed connection between the first U-shaped support and the second U-shaped support through the detachable connection mechanism, so that the alignment and insertion operation between the first U-shaped support and the second U-shaped support is reduced, and the operation convenience and the installation efficiency are improved to a certain extent; and the height adjustment of the first embedded cast-in-place pile and the second embedded cast-in-place pile is realized through the lifting adjusting mechanism respectively, so that the first embedded cast-in-place pile and the second embedded cast-in-place pile can adapt to the heights of the first U-shaped support frame and the second U-shaped support frame through the height adjustment even on the ground with different heights, the installation and the connection are facilitated, and the applicability of the safety support frame is further improved.

Drawings

FIG. 1 is a schematic sectional view of the front side of the present invention;

FIG. 2 is a schematic view of the backside structure of the present invention;

fig. 3 is a schematic top view of the present invention.

In the drawings: 1. a first U-shaped support frame; 11. a first exhibition block; 12. a second exhibition block; 13. a first bollard; 131. a first threaded end; 132. a second threaded end; 101. a baffle plate; 102. a rotating shaft; 103. a jack; 104. a thread groove; 2. a second U-shaped support frame; 21. a third exhibition block; 22. a fourth exhibition block; 23. a second bollard; 3. a first pre-buried cast-in-place pile; 4. second pre-buried cast-in-place piles; 41. a pile body; 411. pile body mounting; 4111. a third threaded end; 412. a pile body is arranged; 4121. a thread structure; 4101. a lifting adjusting mechanism; 42. pile holes; 43. an orifice; 44. a first connection block; 45. a second connecting block; 46. a first connection hole; 47. a second connection hole; 5. a detachable connection mechanism; 51. a first mating hole; 52. a second docking hole; 53. a butt bolt; 54. and (6) butting the nuts.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic front sectional view, fig. 2 is a schematic back sectional view, and fig. 3 is a schematic top view.

The utility model provides a safety support frame for construction sites, which comprises a first U-shaped support frame 1 and a second U-shaped support frame 2, wherein a first spreading block 11 is arranged at the upper part of the left side of the first U-shaped support frame 1, a second spreading block 12 is arranged at the lower part of the left side of the first U-shaped support frame 1, the lower end of the second spreading block 12 is connected with a first embedded cast-in-place pile 3, a third spreading block 21 is arranged at the upper part of the right side of the second U-shaped support frame 2, a fourth spreading block 22 is arranged at the lower part of the right side of the second U-shaped support frame 2, a second embedded cast-in-place pile 4 is arranged at the lower end of the fourth spreading block 22, the second embedded cast-in-place pile 4 is composed of a pile body 41, a pile hole 42, a flow hole 43, a first connecting block 44, a second connecting block 45, a first connecting hole 46 and a second connecting hole 47, the upper end of the pile body 41 is provided with a pile hole 42, the side wall of the pile body 41 is provided with a first connecting block 44 and a second connecting block 45, and the upper end of the first connecting block 44 is provided with a first connecting hole 46, the upper end of the second connecting block 45 is provided with a second connecting hole 47, the fourth spreading block 22 arranged on the side wall of the second U-shaped support frame 2 is matched with the second connecting block 45, and the fourth spreading block 22 is connected with the second connecting block 45 through bolts. The left side of the second U-shaped support frame 2 is hinged to the right side of the first U-shaped support frame 1, specifically, a rotating shaft 102 is arranged between the upper portion and the lower portion of the left side of the first U-shaped support frame 1, the second U-shaped support frame 2 is hinged to the first U-shaped support frame 1 through the rotating shaft 102, a detachable connecting mechanism 5 used for fixing the second U-shaped support frame 2 on the first U-shaped support frame 1 is arranged at the hinged position of the first U-shaped support frame 1 and the second U-shaped support frame 2, when the second U-shaped support frame 2 is fixed on the first U-shaped support frame 1, the first U-shaped support frame 1 and the second U-shaped support frame 2 are unfolded and located at the same horizontal position, and a plurality of first protection columns 13 and a plurality of second protection columns 23 are arranged on the first U-shaped support frame 1 and the second U-shaped support frame 2 respectively; the pile body 41 is provided with a lifting adjusting mechanism 4101, the pile body 41 enables the second embedded cast-in-place pile 4 to realize height adjustment through the lifting adjusting mechanism 4101, the first embedded cast-in-place pile 3 is the same as the second embedded cast-in-place pile 4, the left side of the first embedded cast-in-place pile 3 is connected with the first U-shaped support frame 1 at one stage, and the right side of the second embedded cast-in-place pile 4 is connected with the second U-shaped support frame 2 at the next stage. Therefore, the first U-shaped supporting frame 1 and the second U-shaped supporting frame 2 are horizontally unfolded, and the first U-shaped supporting frame 1 and the second U-shaped supporting frame 2 are fixedly connected through the detachable connecting mechanism 5, so that the aligning and inserting operation between the first U-shaped supporting frame 1 and the second U-shaped supporting frame 2 is reduced, and the operation convenience and the installation efficiency are improved to a certain extent; and the height adjustment of the first embedded cast-in-place pile 3 and the second embedded cast-in-place pile 4 is respectively realized through the lifting adjusting mechanism 4101, so that even on the ground with different heights, the first embedded cast-in-place pile 3 and the second embedded cast-in-place pile 4 can adapt to the heights of the first U-shaped supporting frame 1 and the second U-shaped supporting frame 2 through the height adjustment, the installation connection between the first embedded cast-in-place pile 3 and the first U-shaped supporting frame 1 is facilitated, the installation connection between the second embedded cast-in-place pile 4 and the second U-shaped supporting frame 2 is realized, and the applicability of the safety supporting frame is further improved.

Specifically, the detachable connection mechanism 5 includes a first connection hole 51 penetrating through the right side of the first U-shaped support frame 1, a second connection hole 52 penetrating through the left side of the second U-shaped support frame 2, a connection bolt 53 simultaneously inserted into the first connection hole 51 and the second connection hole 52, and a connection nut 54 engaged with the connection bolt 53; the first connection hole 51 and the second connection hole 52 are respectively provided with two, the two first connection holes 51 respectively penetrate through the upper and lower parts of the right side of the first U-shaped support frame 1, the two second connection holes 52 respectively penetrate through the upper and lower parts of the left side of the second U-shaped support frame 2, the two first connection holes 51 and the two second connection holes 52 are arranged close to the rotating shaft 102, and correspondingly, the two connection bolts 53 and the two connection nuts 54 are also provided. When the device is used, the second U-shaped support frame 2 is unfolded, the second U-shaped support frame 2 is rotated to be positioned at the same horizontal position as the first U-shaped support frame 1, at the moment, the second butt joint hole 52 on the second U-shaped support frame 2 is aligned with the first butt joint hole 51 on the first U-shaped support frame 1, then the butt joint bolt 53 simultaneously penetrates through the first butt joint hole 51 and the second butt joint hole 52, and then the butt joint nut 54 is fixedly connected with the butt joint bolt 53, so that the first U-shaped support frame 1 is fixedly connected with the second U-shaped support frame 2; the mode has the advantages of operation direction and firm connection.

And the baffle 101 horizontally extends from the right side of the first U-shaped support frame 1 to the direction of the second U-shaped support frame 2, and when the docking bolt 53 is simultaneously inserted into the first docking hole 51 and the second docking hole 52, the left side of the second U-shaped support frame 2 abuts against the baffle 101. That is, when the second U-shaped supporting frame 2 is unfolded and located at the same horizontal position as the first U-shaped supporting frame 1, the left side portion of the second U-shaped supporting frame 2 abuts against the baffle 101, so that the alignment operation of the first aligning hole 51 and the second aligning hole 52 can be quickly and conveniently realized through the baffle 101, and the installation efficiency is further improved.

First pillar 13 can be dismantled and connect on first U type support 1, and the welding of second pillar 23 is between second U type support 2, and second U type support 2 is rotatable to be folded in first U type support 1. So, can demolish first pillar 13, then with second U type supporting rack 2 to the left-hand motion, make second U type supporting rack 2 fold arrange in first U type supporting rack 1, can effectively reduce safe supporting rack's volume like this to safe supporting rack's accomodation and transportation.

The upper end of the first U-shaped support 1 is penetrated with a jack 103, the upper surface of the lower end is provided with a thread groove 104, the upper end of the first guard post 13 is a first thread end 131, and the lower end is a second thread end 132 matched with the thread groove 104; the upper end of the first protection column 13 is inserted into the insertion hole 103 and fixed by an external nut, and the lower end of the first protection column 13 is in threaded connection with the thread groove 104 through the second thread end 132, so that the detachable connection between the first protection column 13 and the first U-shaped support frame 1 is realized. Compared with the prior art, the mode reduces the use of the nut to a certain extent, avoids the loss of the nut, further avoids the increase of the cost, and has the advantages of convenient operation and firm connection, and can further improve the installation efficiency.

Pile body 41 includes last pile body 411 and lower pile body 412 that from top to bottom set gradually, it is third screw thread end 4111 to go up the pile body 411 lower extreme, integrated into one piece has the helicitic texture 4121 with third screw thread end 4111 adaptation in the pile body 412 down, go up pile body 411 and pile body 412 down and form lift adjustment mechanism 4101 through the threaded connection of third screw thread end 4111 with helicitic texture 4121, first connecting block 44 and second connecting block 45 all locate on last pile body 411, it has discharge hole 43 all to go up pile body 411 and pile body 412 lateral wall down, pile hole 42 runs through last pile body 411 and pile body 412 down simultaneously, and pile hole 42 and discharge hole 43 intercommunication. So, through the threaded connection of last pile 411 and lower pile 412 for first pre-buried bored concrete pile 3 and the pre-buried bored concrete pile 4 altitude mixture control of second are convenient, and the steadiness after adjusting is good.

The working principle is as follows: firstly, respectively adjusting the heights of a first embedded cast-in-place pile 3 and a second embedded cast-in-place pile 4 through an upper pile body 411 and a lower pile body 412, when the heights of the first embedded cast-in-place pile 3 and the second embedded cast-in-place pile 4 are adjusted to be proper, ground embedding is carried out on the first embedded cast-in-place pile 3 and the second embedded cast-in-place pile 4, and fixed installation with the ground is realized through concrete; then unfolding the second U-shaped support frame 2, rotating the second U-shaped support frame 2 to be in the same horizontal position with the first U-shaped support frame 1, then fixedly connecting the first U-shaped support frame 1 and the second U-shaped support frame 2 through a butt bolt 53 and a butt nut 54, then fixedly connecting the first U-shaped support frame 1 and the first pre-embedded cast-in-place pile 3 through a bolt, fixedly connecting the second U-shaped support frame 2 and the second pre-embedded cast-in-place pile 4 through a bolt, then inserting the first support column 13 into the jack 103 from top to bottom, connecting and fixing the second threaded end 132 and the threaded groove 104 through a thread, and fixedly connecting the first threaded end 131 through an external nut to realize the connection between the first support column 13 and the first U-shaped support frame 1, and finally connecting the first unfolding block 11 and the third unfolding block 21 arranged on the first U-shaped support frame 1 and the second U-shaped support frame 2 with the next-stage U-shaped support frame, the connecting block that first pre-buried bored concrete pile 3 and the pre-buried bored concrete pile 4 of second set up can connect next level U type support frame, can use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A safety support frame for a construction site comprises a first U-shaped support frame (1) and a second U-shaped support frame (2), wherein a first unfolding block (11) is arranged on the upper portion of one side of the first U-shaped support frame (1), a second unfolding block (12) is arranged on the lower portion of one side of the first U-shaped support frame (1), a first pre-buried cast-in-place pile (3) is connected to the lower end of the second unfolding block (12), a third unfolding block (21) is arranged on the upper portion of the other side of the second U-shaped support frame (2), a fourth unfolding block (22) is arranged on the lower portion of the other side of the second U-shaped support frame (2), a second pre-buried cast-in-place pile (4) is arranged on the lower end of the fourth unfolding block (22), and the second pre-buried cast-in-place pile (4) is composed of a pile body (41), a pile hole (42), a flow hole (43), a first connecting block (44), a second connecting block (45), a first connecting hole (46) and a second connecting hole (47), pile hole (42) has been seted up to the upper end of pile body (41), and flow hole (43) have been seted up to the lateral wall of pile body (41), the lateral wall upper portion of pile body (41) is provided with first connecting block (44) and second connecting block (45), and first connecting hole (46) have been seted up to the upper end of first connecting block (44), second connecting hole (47) have been seted up to the upper end of second connecting block (45), fourth exhibition piece (22) and second connecting block (45) cooperation setting that second U type protects frame (2) lateral wall setting, and fourth exhibition piece (22) and second connecting block (45) realize being connected through the bolt, its characterized in that, one side of second U type protects frame (2) articulate in on the opposite side of first U type support frame (1), and first U type support frame (1) with the articulated department of second U type support frame (2) is equipped with and is used for with second U type support frame (2) is fixed in on first U type support frame (1) When the second U-shaped support frame (2) is fixed on the first U-shaped support frame (1), the first U-shaped support frame (1) and the second U-shaped support frame (2) are unfolded and positioned at the same horizontal position, and a first protective column (13) and a second protective column (23) are respectively arranged on the first U-shaped support frame (1) and the second U-shaped support frame (2); the pile body (41) is provided with a lifting adjusting mechanism (4101), the pile body (41) enables the second embedded cast-in-place pile (4) to realize height adjustment through the lifting adjusting mechanism (4101), the first embedded cast-in-place pile (3) is the same as the second embedded cast-in-place pile (4), one side of the first embedded cast-in-place pile (3) is connected with a first U-shaped support frame (1) of one stage, and the other side of the second embedded cast-in-place pile (4) is connected with a second U-shaped support frame (2) of the next stage.

2. The safety support frame for the construction site according to claim 1, wherein a rotating shaft (102) is arranged between the upper portion and the lower portion of the other side of the first U-shaped support frame (1), the second U-shaped support frame (2) is hinged to the first U-shaped support frame (1) through the rotating shaft (102), and the detachable connecting mechanism (5) comprises a first connecting hole (51) penetrating through the first U-shaped support frame (1), a second connecting hole (52) penetrating through the second U-shaped support frame (2), a connecting bolt (53) simultaneously inserted into the first connecting hole (51) and the second connecting hole (52), and a connecting nut (54) matched with the connecting bolt (53).

3. A safety support for construction site according to claim 2, wherein a blocking plate (101) is extended from the other side of the first U-shaped support (1) toward the second U-shaped support (2), and when the docking bolt (53) is simultaneously inserted into the first docking hole (51) and the second docking hole (52), one side of the second U-shaped support (2) abuts against the blocking plate (101).

4. A safety support for construction sites according to claim 3, wherein the first post (13) is detachably connected to the first U-shaped support (1), the second post (23) is fixedly connected to the second U-shaped support (2), and the second U-shaped support (2) is rotatably folded in the first U-shaped support (1).

5. A safety support for construction sites according to claim 4, wherein the first U-shaped support (1) is provided with a jack (103) at the upper end and a threaded groove (104) at the lower end, the first post (13) is provided with a first threaded end (131) at the upper end and a second threaded end (132) at the lower end, which is matched with the threaded groove (104); the upper end of the first protective column (13) is inserted into the jack (103) and fixed through a nut, and the lower end of the first protective column (13) is in threaded connection with the threaded groove (104) through a second threaded end (132) so as to detachably connect the first protective column (13) with the first U-shaped support frame (1).

6. A safety support for construction site according to claim 1, wherein the pile body (41) comprises an upper pile body (411) and a lower pile body (412) which are arranged from top to bottom in sequence, the lower end of the upper pile body (411) is a third threaded end (4111), a threaded structure (4121) matched with the third threaded end (4111) is arranged in the lower pile body (412), the upper pile body (411) and the lower pile body (412) form the lifting adjusting mechanism (4101) through the threaded connection of the third threaded end (4111) and the threaded structure (4121), the first connecting block (44) and the second connecting block (45) are both arranged on the upper pile body (411), the flow hole (43) is respectively formed on the side walls of the upper pile body (411) and the lower pile body (412), and the pile hole (42) simultaneously penetrates through the upper pile body (411) and the lower pile body (412), and the stake hole (42) communicates with the flow hole (43).