A PC formwork system suitable for deep foundation pit basement outer wall and a construction method thereof

Abstract

The application provides a PC formwork system suitable for a deep foundation pit basement outer wall and a construction method thereof. The formwork system is formed by combining and installing a foundation mechanism, a frame mechanism, an outer wall mechanism, a supporting mechanism and a platform mechanism, and then is used for constructing a basement outer wall. Compared with a traditional cast-in-place system, the construction effect is fast, a large amount of manpower and material resources is saved, the construction period is shortened, the construction efficiency is improved, the problems of slow construction, low efficiency and the need of a large amount of labor in the traditional pouring mode are solved. After the basement outer wall pouring is completed, the formwork system can be quickly disassembled and treated, and can be reused in the next basement outer wall pouring process, so that the cost is saved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of PC formwork system construction, and particularly relates to a PC formwork system suitable for a deep foundation pit basement outer wall and a construction method thereof. BACKGROUND

[0002] Prefabricated concrete structure is a short name of prefabricated concrete structure, which is a concrete structure formed by connecting prefabricated components as main force components. Prefabricated reinforced concrete structure is one of important directions of development of building structure in China, which is beneficial to development of building industrialization in China, helps to improve production efficiency, save energy, develop green and environment-friendly building, and is beneficial to improving and ensuring building engineering quality. Compared with cast-in-place construction method, prefabricated PC structure is beneficial to green construction, because prefabricated construction can better meet requirements of green construction such as land saving, energy saving, material saving, water saving and environment protection, can reduce negative influence on environment, including reducing noise, preventing dust raising, reducing environmental pollution, clean transportation, reducing site interference, saving water, electricity, materials and other resources and energy, and following the principle of sustainable development.

[0003] The prior art (CN102191779B) provides a basement outer wall construction method by reverse construction method, comprising: a top and bottom plate for construction, the top plate has an upward upper boss, and the bottom plate has a downward lower boss; a side wall wood form for installation, the wood form is surrounded on the outer column surface of the upper boss and the outer column surface of the lower boss; a first water stop plate for installation on the wood form, a part segment between the upper boss in the wood form and the first water stop plate is poured with concrete, and is formed into upper segment concrete, and the upper segment concrete and the upper boss are connected integrally; a bracket for installation on the wood form, the bracket port is higher than the first water stop plate, and a second water stop plate is arranged above the lower boss; a part segment between the upper segment concrete in the wood form and the second water stop plate can be poured with concrete by using the bracket, and is formed into lower segment concrete, and the lower segment concrete, the upper segment concrete and the lower boss are connected integrally. The basement outer wall construction method has the following advantages: beneficial to overall water seepage prevention of the outer wall, and beneficial to shrinkage control.

[0004] In the above prior art, although it is beneficial to overall water seepage prevention of the outer wall, the pouring method adopted is still a traditional manual construction process, and the space that can be operated for construction of the basement outer wall is limited, so that the traditional process, construction process and personnel operation are limited to a certain extent, and the traditional pouring method needs to invest a large amount of labor and has low efficiency, so that the construction period is long, thereby resulting in large construction difficulty and a series of construction problems. SUMMARY

[0005] To address the shortcomings of existing technologies, this invention provides a PC formwork system and its construction method suitable for the exterior walls of deep foundation pit basements, solving the problems of high labor input, low construction efficiency, and high difficulty in traditional pouring methods.

[0006] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0007] A PC formwork system for the exterior walls of deep foundation pit basements includes a foundation mechanism, on which a frame mechanism and an exterior wall assembly mechanism are movably inserted, with the exterior wall assembly mechanism closely attached to one side of the outer wall of the frame mechanism. A support mechanism for abutting the frame mechanism and the exterior wall assembly mechanism can also be detachably installed on the foundation mechanism, and a platform mechanism for construction workers to stand on can be detachably installed on the support mechanism.

[0008] Furthermore, the foundation structure is a basement floor, including a foundation body. The foundation body has a placement groove for installing the frame structure. Multiple threaded steel bars are embedded inside the foundation body on one side of the placement groove. The threaded steel bars are inclined and one end extends out of the foundation body. The foundation body below the threaded steel bars has a fixing groove for installing the external wall structure. The foundation body also has a set of adjusting threaded holes for installing the support structure. The threaded steel bars are connected by sleeved pressure beam channel steel. The threaded steel bars are also threaded with fixing discs for fastening the pressure beam channel steel.

[0009] Furthermore, the frame structure includes an outer wall frame inserted into a placement slot, and two sets of steel reinforcement bodies are provided inside the outer wall frame, which are also inserted into the foundation body.

[0010] Furthermore, the exterior wall assembly mechanism includes multiple vertical beams, with locking blocks that match the fixing grooves fixedly installed between the bottom of the vertical beams. Multiple locking grooves are opened on the outer surface of each vertical beam, and the vertical beams are connected by transverse beams that are movably embedded in the locking grooves.

[0011] Furthermore, the support mechanism includes multiple unidirectional support brackets, with support columns fixedly installed between the bottoms of the unidirectional support brackets. Each unidirectional support bracket has a first threaded hole at one bottom end, and a rotating rod is threaded into each of the first threaded holes. The support mechanism is threadedly connected to the foundation mechanism through the rotating rod. Each unidirectional support bracket has two sets of embedding slots on its top outer surface, and each set of embedding slots has fixing holes for installing the platform mechanism on its inner surface wall.

[0012] Furthermore, the platform mechanism includes multiple inverted F-shaped mounting brackets. Each mounting bracket has a set of insert blocks that match the insert slot at its side end. Each insert block has a second threaded hole. The position and size of the second threaded hole are consistent with the fixing hole. The platform mechanism and the support mechanism are fixed by screw bodies installed in the second threaded hole and the fixing hole. An operating platform is also engaged between the mounting brackets.

[0013] Furthermore, a fixing rod is fixedly installed at two different height positions on one side of the outer wall of each of the unidirectional support brackets, and a reinforcing steel pipe is fixedly connected between multiple fixing rods at the same height, and the reinforcing steel pipe is also fixedly connected to the unidirectional support bracket.

[0014] A method for constructing basement exterior walls using the aforementioned PC formwork system suitable for deep foundation pit basement exterior walls includes the following steps:

[0015] Step 1: Insert the external wall frame and steel reinforcement into the foundation body, ensuring that the external wall frame and steel reinforcement are vertically and stably aligned with the foundation body at their base; then, insert the locking blocks into the fixing grooves, ensuring that the vertical beams are flush with the external wall frame and that the vertical beams are relatively perpendicular to the foundation body; then, install the horizontal beams onto the vertical beams through the locking grooves.

[0016] Step 2: Place the outer surface of one side of multiple one-way support brackets into contact with the transverse beam plate, and keep the one-way support brackets perpendicular to the foundation body and the external wall frame. Then install the rotating rod, which passes through the first threaded hole and the adjusting threaded hole to fix the one-way support brackets to the foundation body.

[0017] Step 3: Place the pressure beam channel steel between the outer walls of multiple threaded steel bars, and make the pressure beam channel steel contact the inner walls of multiple unidirectional support brackets. Then install the fixing plate on the threaded steel bars. By rotating the position of the fixing plate on the outer wall of the threaded steel bars, the pressure beam channel steel will compress the multiple unidirectional support brackets.

[0018] Step 4: Insert multiple sets of embedding blocks into the inner wall of the embedding groove to achieve the engagement of the mounting frame and the one-way support bracket. Insert multiple screw bodies into the second threaded hole and the fixing hole to achieve mutual compression and fixation between the support mechanism and the platform mechanism. Then, engage and install the operating platform on the mounting frame.

[0019] Step 5: Conduct acceptance inspection. After the acceptance inspection is completed, stand on the operating platform to pour concrete into the interior of the outer wall frame to form the basement outer wall structure. After the concrete reaches the corresponding strength, remove the PC formwork system.

[0020] The present invention has the following beneficial effects:

[0021] This invention combines a foundation mechanism, a frame mechanism, an exterior wall mechanism, a support mechanism, and a platform mechanism to form a template system, which is then used for basement exterior wall construction. Compared to traditional cast-in-place systems, this method offers faster construction, saves significant manpower and resources, shortens the construction cycle, and improves building efficiency. It solves the problems of slow construction, low efficiency, and high labor requirements associated with traditional pouring methods. After the basement exterior wall pouring is completed, the template system can be quickly disassembled and reused in subsequent basement exterior wall pouring processes, saving costs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the PC formwork system for the exterior walls of deep foundation pit basements as described in this invention;

[0023] Figure 2 This is a schematic plan view of the foundation mechanism described in this invention;

[0024] Figure 3 This is an exploded view of the installation structure of the threaded steel bar, pressure beam channel steel, and fixing plate described in this invention;

[0025] Figure 4 This is a schematic cross-sectional view of the frame mechanism described in this invention;

[0026] Figure 5 This is a schematic diagram showing the disassembled external wall mechanism described in this invention;

[0027] Figure 6 This is a schematic diagram of the support mechanism structure described in this invention;

[0028] Figure 7 This is a schematic diagram showing the breakdown of the platform structure described in this invention.

[0029] In the diagram: 1. Foundation structure; 101. Main foundation; 102. Placement groove; 103. Threaded steel bar; 104. Fixing groove; 105. Adjusting threaded hole; 106. Pressure beam channel steel; 107. Fixing plate;

[0030] 2. Frame structure; 201. Exterior wall frame; 202. Reinforced concrete structure; 203. Concrete layer;

[0031] 3. Exterior wall assembly mechanism; 301. Vertical beams and slabs; 302. Slots; 303. Horizontal beams and slabs; 304. Locking blocks;

[0032] 4. Support mechanism; 401. One-way support bracket; 402. Support column; 403. Fixing rod; 404. Reinforcing steel pipe; 405. First threaded hole; 406. Rotating rod; 407. Embedding groove; 408. Fixing hole;

[0033] 5. Platform mechanism; 501. Embedded block; 502. Mounting bracket; 503. Second threaded hole; 504. Screw body; 505. Operating platform. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figure 1 As shown, the present invention provides a PC formwork system for the exterior walls of deep foundation pit basements, comprising a foundation mechanism 1, a frame mechanism 2 movably inserted inside the foundation mechanism 1, an exterior wall mechanism 3 placed on one side of the outer wall of the frame mechanism 2, a support mechanism 4 fixedly installed on the top of the foundation mechanism 1, and a platform mechanism 5 rotatably connected to one side of the outer wall of the support mechanism 4.

[0036] like Figure 1 , 2 As shown in Figure 3, the foundation structure 1 is the floor of the basement, including a foundation body 101. A placement groove 102 is opened on the top of the foundation body 101. Multiple threaded steel bars 103 are embedded inside the foundation body 101 on one side of the placement groove 102. The threaded steel bars 103 are inclined and one end extends out of the foundation body 101. A fixing groove 104 is opened on the top of the foundation body 101 below the threaded steel bars 103. A set of adjusting threaded holes 105 is also opened on the top of the foundation body 101. The multiple threaded steel bars 103 are connected by a pressure beam channel steel 106. A fixing plate 107 is also threadedly connected to the threaded steel bars 103. The fixing plate 107 can rotate on the outer wall of the threaded steel bars 103. Through the rotation and movement of the fixing plate 107, the pressure beam channel steel 106 can be compressed and fixed.

[0037] like Figure 1 , 4 As shown, the frame structure 2 includes an outer wall frame 201, and two sets of steel reinforcement bodies 202 are provided inside the outer wall frame 201. In actual construction, the steel reinforcement bodies 202 are inserted into the foundation body 101, and the outer wall frame 201 is inserted into the placement groove 102. By vertically inserting two sets of steel reinforcement bodies 202 inside the outer wall frame 201 and then pouring concrete into it to form a concrete layer 203, the tensile strength of the completed basement outer wall can be effectively improved.

[0038] like Figure 1 , 5As shown, the exterior wall assembly mechanism 3 includes multiple vertical beams 301. A locking block 304 is fixedly installed between the bottoms of the multiple vertical beams 301, and the size of the locking block 304 matches the fixing groove 104. Multiple slots 302 are formed on the outer surface of each vertical beam 301. The multiple vertical beams 301 are further connected by horizontal beams 303 that are movably embedded in the slots 302, and the horizontal beams 303 are perpendicular to the vertical beams 301. Under the action of the multiple slots 302, the multiple horizontal beams 303 can be engaged between the inner surfaces of the multiple vertical beams 301, thereby achieving a relative linkage between the vertical beams 301 and the horizontal beams 303.

[0039] like Figure 1 , 6 As shown, the support mechanism 4 includes multiple one-way support brackets 401. Support columns 402 are fixedly installed between the bottoms of the one-way support brackets 401. A fixing rod 403 is fixedly installed at two different height positions on one side of the outer wall of each one-way support bracket 401. A reinforcing steel pipe 404 is fixedly connected between the multiple fixing rods 403 at the same height, and the reinforcing steel pipe 404 is also fixedly connected to the one-way support bracket 401.

[0040] like Figure 1 , 2 As shown in Figure 6, each of the one-way support brackets 401 has a first threaded hole 405 at one bottom end, and a rotating rod 406 is threaded into each of the first threaded holes 405. Furthermore, the rotating rod 406 is further threaded into the adjusting threaded hole 105 of the foundation mechanism 1 to maintain the one-way support bracket 401 and the foundation body 101 in a relatively fixed state. Each one-way support bracket 401 has two sets of embedding grooves 407 on its top outer surface, and each set of embedding grooves 407 has a fixing hole 408 on its inner surface wall. By setting the embedding grooves 407, it is ensured that the embedding block 501 in the subsequent platform mechanism 5 can be movably embedded in them, thereby realizing the mutual locking treatment between the support mechanism 4 and the platform mechanism 5.

[0041] like Figure 1 , 7 As shown, the platform mechanism 5 includes multiple inverted F-shaped mounting brackets 502. Each mounting bracket 502 has a set of insert blocks 501 that match the insert slots 407 on its side end. Each insert block 501 has a second threaded hole 503. The position and size of the second threaded hole 503 are consistent with the fixing hole 408. The platform mechanism 5 and the support mechanism 4 are fixed by screw bodies 504 installed in the second threaded hole 503 and the fixing hole 408. An operating platform 505 is also engaged between the mounting brackets 502.

[0042] like Figures 1 to 7As shown, the bottom of the reinforcing bar body 202 is movably inserted into the foundation body 101, the bottom of the outer wall frame 201 is movably inserted into the placement groove 102, the inner surface of the vertical beam slab 301 is in contact with one side of the outer wall of the outer wall frame 201, and the locking block 304 is movably inserted into the placement groove 102; the bottom of the one-way support bracket 401 is fixed in the adjusting threaded hole 105 by the rotating rod 406, and the outer surface of the side of the one-way support bracket 401 is in contact with the transverse beam slab 303, the pressure beam channel steel 106 is in contact with the inner surface of the side of the one-way support bracket 401, and is pressed by the rotating fixing plate 107; the embedding block 501 is embedded in the embedding groove 407 and is fixed by multiple sets of screw bodies 504. The vertical angle of the one-way support bracket 401 can be appropriately adjusted by rotating the rotating rod 406.

[0043] The construction method of the PC formwork system for the exterior walls of deep foundation pit basements described in this invention is as follows:

[0044] Step 1: First, insert the external wall frame 201 and the main steel reinforcement 202 into the placement groove 102, ensuring that the external wall frame 201 and the main steel reinforcement 202 are vertically and stably aligned with the foundation body 101 at their bottom. Then, insert the locking block 304 into the fixing groove 104, ensuring that the vertical beam 301 is in contact with the external wall frame 201 and that the vertical beam 301 is relatively perpendicular to the foundation body 101. Finally, install the horizontal beam 303 onto the vertical beam 301 through the locking groove 302.

[0045] Step 2: Make one side of the outer surface of multiple one-way support brackets 401 contact the transverse beam 303, and keep the one-way support brackets 401 perpendicular to the foundation body 101 and the outer wall frame 201. The multiple one-way support brackets 401 are kept relatively fixed by two reinforcing steel pipes 404 and support columns 402. Then, install the rotating rod 406, which passes through the first threaded hole 405 and the adjusting threaded hole 105 to fix the one-way support brackets 401 to the top of the foundation body 101.

[0046] Step 3: In the fixed state of Step 2, the pressure beam channel steel 106 is sleeved between the outer walls of the multiple threaded steel bars 103, and the pressure beam channel steel 106 is made to contact the inner walls of the multiple one-way support brackets 401. Then, the fixing plate 107 is installed on the threaded steel bars 103. By rotating the position of the fixing plate 107 on the outer wall of the threaded steel bars 103, the pressure beam channel steel 106 is made to compress the multiple one-way support brackets 401, thereby further defining its fixed state.

[0047] Step 4: Insert multiple sets of embedding blocks 501 into the inner surface wall of the embedding groove 407 respectively, thereby realizing the engagement of the mounting bracket 502 and the one-way support bracket 401. Insert multiple screw bodies 504 into the second threaded hole 503 and the fixing hole 408 to realize the mutual compression and fixation between the support mechanism 4 and the platform mechanism 5. Then, the operating platform 505 is engaged and installed on the mounting bracket 502.

[0048] Step 5: Finally, by rotating multiple rotating rods 406, the vertical angle of the unidirectional support bracket 401 is appropriately adjusted to achieve an optimal vertical angle and maintain the optimal vertical state of the outer wall frame 201; then, acceptance is carried out, and after acceptance is completed, concrete is poured inside the outer wall frame 201.

[0049] In practical construction applications, this invention is constructed by splicing together multiple sets of PC formwork systems, resulting in fast construction, saving a significant amount of manpower and resources, shortening the construction cycle, and improving construction efficiency.

[0050] The embodiments described above are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A PC formwork system suitable for the exterior walls of deep foundation pit basements, characterized in that, It includes a foundation mechanism (1), on which a frame mechanism (2) and an outer wall assembly mechanism (3) are movably inserted, and the outer wall assembly mechanism (3) is close to one side of the outer wall of the frame mechanism (2). A support mechanism (4) for pressing against the frame mechanism (2) and the outer wall assembly mechanism (3) can also be detachably installed on the foundation mechanism (1). A platform mechanism (5) for construction personnel to stand on can also be detachably installed on the support mechanism (4). The foundation structure (1) is the basement floor, including a foundation body (101). The foundation body (101) has a placement groove (102) for installing the frame structure (2). Multiple threaded steel bars (103) are embedded inside the foundation body (101) on one side of the placement groove (102). The threaded steel bars (103) are inclined and one end extends out of the foundation body (101). The foundation body (101) below the threaded steel bars (103) has a fixing groove (104) for installing the outer wall structure (3). The foundation body (101) also has a set of adjusting threaded holes (105) for installing the support structure (4). The threaded steel bars (103) are connected by sleeved pressure beam channel steel (106). The threaded steel bars (103) are also threaded with a fixing plate (107) for fastening the pressure beam channel steel (106). The frame structure (2) includes an outer wall frame (201) inserted in a placement slot (102), and two sets of steel reinforcement bodies (202) are provided inside the outer wall frame (201). The steel reinforcement bodies (202) are also inserted inside the foundation body (101). The external wall assembly mechanism (3) includes multiple vertical beams (301), and a locking block (304) matching the fixing groove (104) is fixedly installed between the bottoms of the vertical beams (301). Multiple locking grooves (302) are opened on the outer surface of the vertical beams (301). The vertical beams (301) are connected to each other by a transverse beam (303) that is movably embedded in the locking groove (302). The support mechanism (4) includes multiple one-way support brackets (401), and support columns (402) are fixedly installed between the bottoms of the one-way support brackets (401). Each one-way support bracket (401) has a first threaded hole (405) at one bottom end, and a rotating rod (406) is threaded into each of the first threaded holes (405). The support mechanism (4) is threaded to the foundation mechanism (1) through the rotating rod (406). Each one-way support bracket (401) has two sets of embedding grooves (407) on its top outer surface, and each set of embedding grooves (407) has a fixing hole (408) for installing the platform mechanism (5) on its inner wall. The platform mechanism (5) includes multiple inverted F-shaped mounting brackets (502). Each mounting bracket (502) has a set of insert blocks (501) that match the insert slot (407) on its side end. Each insert block (501) has a second threaded hole (503). The position and size of the second threaded hole (503) are consistent with the fixing hole (408). The platform mechanism (5) and the support mechanism (4) are fixed by screw bodies (504) installed in the second threaded hole (503) and the fixing hole (408). An operating platform (505) is also engaged between the mounting brackets (502). Each of the unidirectional support brackets (401) has a fixed rod (403) fixedly installed at two different height positions on one side of the outer wall. Multiple fixed rods (403) at the same height are fixedly connected by a reinforcing steel pipe (404), and the reinforcing steel pipe (404) is fixedly connected to the unidirectional support bracket (401).

2. A method for constructing basement exterior walls using the PC formwork system for deep foundation pit basement exterior walls as described in claim 1, characterized in that, The process includes the following: Step 1: Insert the frame mechanism (2) into the foundation body (101) while keeping the frame mechanism (2) perpendicular to the foundation body (101); then insert the locking block (304) into the fixing groove (104), with the vertical beam plate (301) in contact with the surface of the frame mechanism (2) and the vertical beam plate (301) perpendicular to the foundation body (101); then install the transverse beam plate (303) on the vertical beam plate (301) through the locking groove (302); Step 2: Place one outer surface of multiple one-way support brackets (401) in contact with the transverse beam plate (303), and keep the one-way support brackets (401) perpendicular to the foundation body (101) and the frame mechanism (2). Then install the rotating rod (406) and use the rotating rod (406) to fix the one-way support brackets (401) on the foundation body (101). Step 3: Place the pressure beam channel steel (106) between the threaded steel (103) and ensure that the pressure beam channel steel (106) is in contact with the inner wall of the one-way support bracket (401). Then, install the fixing plate (107) on the threaded steel (103). By rotating the position of the fixing plate (107) on the threaded steel (103), the pressure beam channel steel (106) will compress the one-way support bracket (401). Step 4: Install the mounting bracket (502) and the one-way support bracket (401) by embedding the embedding blocks (501) into the inner surface wall of the embedding groove (407), then insert the screw body (504) into the second threaded hole (503) and the fixing hole (408) to achieve the compression and fixation of the support mechanism (4) and the platform mechanism (5), and then snap the operating platform (505) onto the mounting bracket (502); Step 5: After the acceptance is completed, stand on the operating platform (505) to pour concrete inside the frame structure (2) to form the basement exterior wall structure. After the concrete reaches the corresponding strength, remove the PC formwork system.

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