Foundation pit support post-dismantling inner support template reinforcing system

Abstract

The utility model relates to a foundation pit support post-dismantling inner support formwork reinforcing system which comprises a first reinforcing structure used for reinforcing an inner support beam and a basement outer wall, the first reinforcing structure comprises a formwork, a plurality of secondary back ridges and a plurality of main back ridges, and the secondary back ridges are arranged on the outer side of the formwork at intervals and extend in the length direction of the formwork. Every two main back ridges form a group, and the multiple groups of main back ridges are arranged on the outer sides of the secondary back ridges at intervals and extend in the width direction of the formwork. The three-section type split screws penetrate through the formwork and then fix the main back ridges and the secondary back ridges through the E-shaped clamps and the nuts; the inner supporting beam comprises a reserved supporting beam, pre-buried basement outer wall horizontal steel bars are arranged in the reserved supporting beam, horizontal steel bar sleeves are arranged at the two ends of the reserved supporting beam, and the opposite-pull screw outer rod located at the position of the reserved supporting beam is connected with the pre-buried basement outer wall horizontal steel bars through the horizontal steel bar sleeves to form an opposite-pull screw. And the outer rod of the opposite-pull screw rod is removed, and the pre-buried basement outer wall horizontal steel bar and the horizontal steel bar sleeve are reserved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of building construction technology, especially relate to a foundation pit support post dismantling inner support formwork reinforcing system. BACKGROUND

[0002] With the development of city construction and underground space, deep foundation pit basement has been more and more applied, and deep foundation pit support reinforced concrete inner support needs to be dismantled after layer-by-layer support replacement with the basement construction, so as to avoid the influence of support replacement and dismantling process on upper structure construction, and the post-dismantling inner support construction method is adopted. In the post-dismantling inner support construction process, pouring inner support beam concrete and basement outer wall concrete will generate large lateral pressure, and double-sided formwork is usually adopted, and water stop screw is arranged for fixation to prevent formwork from swelling and deforming. However, when the water stop steel plate is installed on the inner support beam after the post-dismantling inner support process, the formwork and reinforcing system cannot be continuous, and at the same time, the traditional water stop screw is time-consuming and laborious to remove, is not conducive to wall surface repair and waterproof construction in the later period, and the water stop screw is prone to material waste and increase of construction cost when the formwork is reinforced for the inner support beam structure. When the inner support beam with embedded water stop steel plate is reinforced, the formwork at the position of the water stop steel plate is prone to slurry leakage, and the water stop steel plate is prone to be damaged by pile machines during soil excavation and other operations after the inner support beam is removed. SUMMARY

[0003] The utility model discloses a kind of foundation pit support post dismantling inner support formwork reinforcing systems to overcome the deficiencies in the prior art, to solve the reinforcement problem of inner support beam and basement outer wall, and can effectively solve the slurry leakage problem of water stop steel plate position and water stop steel plate protection problem.

[0004] The technical solution of the utility model is a kind of foundation pit support post dismantling inner support formwork reinforcing systems, including the first reinforcing structure for reinforcing inner support beam and basement outer wall, the first reinforcing structure includes formwork, several secondary back laths and several main back laths, the secondary back lath is arranged at the outer side of the formwork and extends along the length direction of the formwork, every two main back laths are a group, and multiple groups of main back laths are arranged at the outer side of the secondary back lath and extend along the width direction of the formwork, three-section type pull screw is fixed with the main back lath and the secondary back lath after being penetrated through the formwork by mountain type card and nut;

[0005] The inner support beam comprises a reserved support beam, a pre-buried basement outer wall horizontal steel bar is arranged in the reserved support beam, a horizontal steel bar sleeve is sleeved at both ends of the pre-buried basement outer wall horizontal steel bar, and an outer rod of the opposite-pulling screw rod located at the position of the reserved support beam is connected with the pre-buried basement outer wall horizontal steel bar through the horizontal steel bar sleeve to form the opposite-pulling screw rod; after the inner support beam is poured with concrete, the outer rod of the opposite-pulling screw rod is removed, and the pre-buried basement outer wall horizontal steel bar and the horizontal steel bar sleeve are reserved to be connected with basement outer wall horizontal steel bars.

[0006] Preferably, the total length of the pre-buried basement outer wall horizontal steel bar and the horizontal steel bar sleeve is equal to the horizontal length of the section of the reserved support beam, and the end of the horizontal steel bar sleeve is close to the formwork after the formwork installation reinforcement of both sides of the reserved support beam.

[0007] Preferably, a water stop steel plate is arranged in the reserved support beam, the water stop steel plate comprises an outer leakage part extending out of the reserved support beam and surrounding the outside of the reserved support beam, and the first reinforcement structure is segmented and installed on both sides of the water stop steel plate according to the position of the water stop steel plate; the outer leakage part of the water stop steel plate is clamped by the formwork and the secondary back bar on both sides of the water stop steel plate to prevent slurry leakage during pouring.

[0008] Preferably, the total thickness of the formwork and the secondary back bar is greater than the width of the outer leakage part of the water stop steel plate.

[0009] Preferably, in the case that the inner support beam is obliquely intersected with the crown beam, the outer leakage part of the water stop steel plate is bent along the edge line of the reserved support beam to be perpendicular to the construction joint at both opposite ends of the reserved support beam to complete the reinforcement.

[0010] Preferably, in the case that the pre-buried basement outer wall horizontal steel bar and the outer rod of the opposite-pulling screw rod are different in diameter, a variable-diameter sleeve is used for the horizontal steel bar sleeve to ensure the connection.

[0011] Preferably, a pre-buried basement outer wall vertical steel bar is further arranged in the reserved support beam, a vertical steel bar sleeve is sleeved at both ends of the pre-buried basement outer wall vertical steel bar to be connected with basement outer wall vertical steel bars; after the basement outer wall vertical steel bars and the basement outer wall horizontal steel bars are connected in length, the formwork is installed and reinforced on the basement outer wall, and the formwork is tightly pressed against the inner support beam to prevent slurry leakage.

[0012] Preferably, a second reinforcement structure is further included, and the second reinforcement structure is installed on both sides of the water stop steel plate after the inner support beam is removed from the mold to protect the water stop steel plate.

[0013] As preferred, the second reinforcing structure comprises the square timber secondary back strakes arranged close to both sides of the pre-reserved support beam, the outer rod of the anchor bolt is connected with the embedded horizontal steel bar of the basement outer wall through the horizontal steel bar sleeve to form the anchor bolt, and the anchor bolt fixes the square timber secondary back strake through the mountain-shaped card and the nut.

[0014] As preferred, the thickness of the square timber secondary back strake is greater than or equal to the width of the outer leakage part of the water stop steel plate.

[0015] Compared with the prior art, the utility model has the beneficial effects:

[0016] (1) the three-section anchor bolt is used for formwork reinforcement of the inner support beam and the basement outer wall, which is convenient for formwork removal construction in the later period, is also beneficial for wall surface repair and waterproof construction in the later period.

[0017] (2) the three-section anchor bolt is formed by connecting the embedded horizontal steel bar of the basement outer wall and the horizontal steel bar sleeve with the outer rod of the anchor bolt, after the inner support beam concrete is poured, the outer rod of the anchor bolt is removed, the embedded horizontal steel bar of the basement outer wall and the horizontal steel bar sleeve are reserved, and are used for connecting the horizontal steel bar of the basement outer wall, which not only saves the anchor bolt material and reduces the construction cost, but also reduces the construction time and improves the construction efficiency.

[0018] (3) the first reinforcing structure is installed in sections on both sides of the water stop steel plate according to the position of the water stop steel plate, the formwork and the secondary back strake clamp the water stop steel plate, and prevent slurry leakage in the pouring process.

[0019] (4) after the inner support beam is removed, the second reinforcing structure is installed on both sides of the water stop steel plate, the square timber secondary back strake is fixed by the three-section anchor bolt, and the water stop steel plate is protected, so that the water stop steel plate is prevented from being damaged by the pile machine in the process of earth excavation and other operations. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a plan view of the formwork reinforcement of the inner support beam of the utility model;

[0021] Figure 2 is a sectional view of the formwork reinforcement of the inner support beam of the utility model;

[0022] Figure 3 is Figure 2 the connection between the inner support beam and the formwork in the utility model;

[0023] Figure 4 is Figure 1 the enlarged view of A in the utility model;

[0024] Figure 5 is a plan view of the formwork removal of the inner support beam of the utility model;

[0025] Figure 6Is basement outer wall steel bar lengthening elevation schematic diagram of the utility model;

[0026] Figure 7 Is basement outer wall horizontal steel bar and vertical steel bar lengthening section schematic diagram of the utility model;

[0027] Figure 8 Is basement outer wall formwork reinforcing plane schematic diagram of the utility model;

[0028] Figure 9 Is basement outer wall formwork reinforcing section schematic diagram of the utility model;

[0029] Figure 10 Is basement outer wall formwork reinforcing elevation schematic diagram of the utility model;

[0030] Figure 11 Is inner support beam local plane schematic diagram of crown beam and inner support diagonal intersection working condition;

[0031] Figure 12 Is Figure 11 Water stop steel plate elevation schematic diagram.

[0032] Main component symbol explanation:

[0033] First reinforcing structure 1;Formwork 11;Secondary back ridge 12;Main back ridge 13;Opposite pull screw rod 14;Opposite pull screw rod outer rod 141;Opposite pull screw rod inner rod 142;Sleeve 143;Mountain type card 15;Nut 16;Inner support beam 2;Basement outer wall 3;Basement outer wall horizontal steel bar 31;Basement outer wall vertical steel bar 32;Reserved support beam 4;Pre-buried basement outer wall horizontal steel bar 41;Horizontal steel bar sleeve 411;Pre-buried basement outer wall vertical steel bar 42;Vertical steel bar sleeve 421;Water stop steel plate 43;Outer leakage part 431;Reserved support beam edge line 44;Construction joint joint 45;Crown beam 5;Second reinforcing structure 6;Square wood secondary back ridge 61. Specific implementation

[0034] The utility model will make further detailed description below in combination with drawings:

[0035] Please refer to Figures 1 to 3 、 Figures 8 to 10As shown, the utility model provides a kind of foundation pit support rear dismantles inner support formwork reinforcing system, including the first reinforcing structure 1 for reinforcing inner support beam 2 and basement outer wall 3, first reinforcing structure 1 includes formwork 11, several secondary back 12 and several main back 13, secondary back 12 is spaced apart and is arranged at the outside of formwork 11 and extends along the length direction of formwork 11, and every two main back 13 is a group, and several groups of main back 13 are spaced apart and are arranged at the outside of secondary back 12 and extend along the width direction of formwork 11, three-section type pull screw 14 is fixed after being penetrated through formwork 11 by mountain type card 15 and nut 16, and main back 13 and secondary back 12;Three-section type pull screw 14 includes pull screw outer rod 141 penetrated through formwork 11 and pull screw inner rod 142 embedded in inner support beam 2 or basement outer wall 3, and the both ends of pull screw inner rod 142 are connected with pull screw outer rod 141 by sleeve 143. Figures 1 to 3 As shown, inner support beam 2 includes reserved support beam 4, and reserved support beam 4 is provided with embedded basement outer wall horizontal steel bar 41, and the both ends of embedded basement outer wall horizontal steel bar 41 are sleeved with horizontal steel sleeve 411, and embedded basement outer wall horizontal steel bar 41 is used as pull screw inner rod, and pull screw outer rod 141 located at the position of reserved support beam 4 is connected with embedded basement outer wall horizontal steel bar 41 by horizontal steel sleeve 411 to form three-section type pull screw 14, after pouring concrete in inner support beam 2, pull screw outer rod 141 is removed, and embedded basement outer wall horizontal steel bar 41 and horizontal steel sleeve 411 are retained to be used for connecting basement outer wall horizontal steel bar 31.The first reinforcing structure uses three-section type pull screw to reinforce formwork of inner support beam and basement outer wall, which is convenient for post-dismantling construction, and is also beneficial to post-wall surface repair and waterproof construction;Meanwhile, embedded basement outer wall horizontal steel bar and horizontal steel sleeve are connected with pull screw outer rod to form three-section type pull screw, after pouring concrete in inner support beam, pull screw outer rod is removed, and embedded basement outer wall horizontal steel bar and horizontal steel sleeve are retained to be used for connecting basement outer wall horizontal steel bar, which not only saves pull screw material and reduces construction cost, but also reduces construction time and improves construction efficiency.

[0036] In the embodiment, secondary back 12 is made of batten, and main back 13 is made of steel pipe;Batten secondary back is spaced apart and arranged at the outside of formwork and extends along the length direction of formwork, and steel pipe main back is spaced apart and arranged at the outside of batten secondary back and extends along the width direction of formwork, and steel pipe main back is perpendicular to batten secondary back, and two steel pipe main backs form double steel pipe structure, and mountain type card is penetrated through pull screw and clamped double steel pipe and is fixed by nut to complete formwork reinforcing operation.

[0037] It is worth mentioning that, as Figure 1As shown, the total length of the embedded basement outer wall horizontal steel bars 41 and the horizontal steel sleeve 411 is equal to the horizontal length of the reserved support beam 4 section, and the horizontal steel sleeve 411 is flush with the formwork 11. After the formwork 11 on both sides of the reserved support beam 4 is installed and reinforced, the end of the horizontal steel sleeve 411 is in close contact with the formwork 11. Because the horizontal steel sleeve 411 is flush with the formwork 11, the embedded basement outer wall horizontal steel bars 41 and the horizontal steel sleeve 411 are integrally embedded in the formwork 11, and there is no need to open holes in the formwork 11, which is beneficial to the reinforcement and removal of the formwork 11 and improves the visual effect.

[0038] As shown in FIG. 1, the first reinforcing structure 1 comprises a formwork 11, a secondary back 12, a reserved support beam 4, a crown beam 5, a horizontal steel sleeve 411, a vertical steel sleeve 421, a horizontal steel bar 41, a vertical steel bar 42, a stop steel plate 43, a pull rod 14, and a pull rod outer rod 141. Figures 1 to 2 As shown, the reserved support beam 4 is provided with a stop steel plate 43, and the stop steel plate 43 comprises an outer leakage portion 431 extending out of the reserved support beam 4 and surrounding the outside of the reserved support beam 4. The first reinforcing structure 1 is installed in segments on both sides of the stop steel plate 43 according to the position of the stop steel plate 43, and the formwork 11 and the secondary back 12 on both sides of the stop steel plate 43 clamp the outer leakage portion 431 of the stop steel plate 43 to prevent slurry leakage during pouring. Specifically, as shown in FIG. 2, the total thickness H of the formwork 11 and the secondary back 12 is greater than the width d of the outer leakage portion 431 of the stop steel plate 43; in this embodiment, the width d of the outer leakage portion 431 of the stop steel plate 43 is 100-150 mm. Figure 4

[0039] As shown in FIG. 1, the first reinforcing structure 1 comprises a formwork 11, a secondary back 12, a reserved support beam 4, a crown beam 5, a horizontal steel sleeve 411, a vertical steel sleeve 421, a horizontal steel bar 41, a vertical steel bar 42, a stop steel plate 43, a pull rod 14, and a pull rod outer rod 141. Figures 11 to 12 As shown in FIG. 1, the first reinforcing structure 1 comprises a formwork 11, a secondary back 12, a reserved support beam 4, a crown beam 5, a horizontal steel sleeve 411, a vertical steel sleeve 421, a horizontal steel bar 41, a vertical steel bar 42, a stop steel plate 43, a pull rod 14, and a pull rod outer rod 141. Figure 12 As shown in FIG. 1, the first reinforcing structure 1 comprises a formwork 11, a secondary back 12, a reserved support beam 4, a crown beam 5, a horizontal steel sleeve 411, a vertical steel sleeve 421, a horizontal steel bar 41, a vertical steel bar 42, a stop steel plate 43, a pull rod 14, and a pull rod outer rod 141.

[0040] In some embodiments, the embedded basement outer wall horizontal steel bars 41 and the pull rod outer rod 141 are different in diameter, and the horizontal steel sleeve 411 can be a variable-diameter sleeve to ensure the connection between the embedded basement outer wall horizontal steel bars 41 and the pull rod outer rod 141.

[0041] As shown in FIG. 1, the first reinforcing structure 1 comprises a formwork 11, a secondary back 12, a reserved support beam 4, a crown beam 5, a horizontal steel sleeve 411, a vertical steel sleeve 421, a horizontal steel bar 41, a vertical steel bar 42, a stop steel plate 43, a pull rod 14, and a pull rod outer rod 141. Figures 6 to 7 As shown in FIG. 1, the first reinforcing structure 1 comprises a formwork 11, a secondary back 12, a reserved support beam 4, a crown beam 5, a horizontal steel sleeve 411, a vertical steel sleeve 421, a horizontal steel bar 41, a vertical steel bar 42, a stop steel plate 43, a pull rod 14, and a pull rod outer rod 141.​

[0042] As shown in Figures 8 to 10 As shown in FIG. 3, after the basement outer wall vertical steel bars 32 and the basement outer wall horizontal steel bars 31 are connected, the basement outer wall 3 is installed with a formwork and reinforced, the formwork 11 is tightly contacted with the inner support beam 2 to prevent slurry leakage.

[0043] As shown in Figure 5 As shown in FIG. 4, the inner support formwork and reinforcement system after the foundation pit support is removed further comprises a second reinforcement structure 6, the second reinforcement structure 6 is installed on both sides of the water stop steel plate 43 after the inner support beam 2 is removed to protect the water stop steel plate 43. Specifically, the second reinforcement structure 6 comprises a square wood secondary back 61 which is arranged close to both sides of the reserved support beam 4, an outer rod 141 of a counter pull screw is connected to the embedded basement outer wall horizontal steel bars 41 through a horizontal steel bar sleeve 411 to form a counter pull screw 14, the counter pull screw 14 is fixed to the square wood secondary back 61 through a mountain-shaped clamp 15 and a nut 16. As shown in Figure 4 As shown in FIG. 5, the thickness h of the square wood secondary back 61 is greater than or equal to the width d of the outer leakage part 431 of the water stop steel plate 43 to protect the water stop steel plate and avoid the water stop steel plate 43 from being damaged by a pile machine during the earth excavation and other operations. In the embodiment, as shown in Figure 5 As shown in FIG. 6, the thickness h of the square wood secondary back 61 is equal to the width d of the outer leakage part 431 of the water stop steel plate 43, and the width d of the outer leakage part 431 is 100-150 mm.

[0044] The above only describes the preferred embodiments of the present application, and any changes and modifications made within the scope of the present application should be covered by the present application.

Claims

1. A reinforcement system for internal support formwork after foundation pit support is removed, characterized in that, The first reinforcement structure includes a template, several secondary back ribs and several main back ribs. The secondary back ribs are spaced apart on the outside of the template and extend along the length of the template. The main back ribs are arranged in pairs. Multiple sets of main back ribs are spaced apart on the outside of the secondary back ribs and extend along the width of the template. Three-section tie rods pass through the template and are fixed to the main back ribs and secondary back ribs by U-shaped clips and nuts. The inner support beam includes a reserved support beam, in which pre-embedded horizontal reinforcement bars for the basement exterior wall are provided. Horizontal reinforcement sleeves are sleeved at both ends of the pre-embedded horizontal reinforcement bars for the basement exterior wall. The outer rod of the tie rod located at the position of the reserved support beam is connected to the pre-embedded horizontal reinforcement bars for the basement exterior wall through the horizontal reinforcement sleeves to form the tie rod. After the concrete of the inner support beam is poured, the outer rod of the tie rod is removed, and the pre-embedded horizontal reinforcement bars for the basement exterior wall and the horizontal reinforcement sleeves are retained for connecting the horizontal reinforcement bars for the basement exterior wall.

2. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 1, characterized in that, The total length of the pre-embedded horizontal reinforcing bars and horizontal reinforcing bar sleeves in the basement exterior wall is equal to the horizontal length of the reserved support beam section. After the templates on both sides of the reserved support beam are installed and reinforced, the ends of the horizontal reinforcing bar sleeves are tightly attached to the templates.

3. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 1, characterized in that, The reserved support beam is equipped with a water-stop steel plate. The water-stop steel plate includes an exposed portion that extends out of the reserved support beam and surrounds the outside of the reserved support beam. The first reinforcement structure is installed and reinforced in sections on both sides of the water-stop steel plate according to the position of the water-stop steel plate. The templates and secondary back ribs on both sides of the water-stop steel plate clamp the exposed portion of the water-stop steel plate to prevent grout leakage during the pouring process.

4. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 3, characterized in that, The total thickness of the template and the secondary back rib is greater than the width of the exposed portion of the waterstop steel plate.

5. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 3 or 4, characterized in that, When the inner support beam and the cap beam are obliquely intersecting, the exposed portion of the waterstop steel plate is located at both ends of the reserved support beam on both sides and is bent along the edge line of the reserved support beam to be perpendicular to the construction joint joint in order to complete the reinforcement.

6. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 1, characterized in that, When the diameter of the pre-embedded horizontal reinforcing bar in the basement exterior wall is different from that of the tie rod, a variable diameter sleeve is used for the horizontal reinforcing bar sleeve to ensure connection.

7. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 1, characterized in that, The reserved support beam is also equipped with embedded vertical steel bars for the basement exterior wall. The two ends of the embedded vertical steel bars are fitted with vertical steel bar sleeves to connect the vertical steel bars of the basement exterior wall. After the vertical steel bars and horizontal steel bars of the basement exterior wall are extended, the basement exterior wall is reinforced by formwork installation. The formwork is tightened against the inner support beam to prevent grout leakage.

8. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 3, characterized in that, It also includes a second reinforcement structure. After the inner support beam is demolded, the second reinforcement structure is installed on both sides of the waterstop steel plate to protect the waterstop steel plate.

9. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 8, characterized in that, The second reinforcement structure includes secondary back braces of square timber set close to both sides of the reserved support beam. The outer rod of the tie rod is connected to the horizontal steel bar of the pre-embedded basement outer wall through a horizontal steel bar sleeve to form a tie rod. The tie rod is fixed to the secondary back braces of square timber by a U-shaped clip and a nut.

10. The post-removal internal support formwork reinforcement system for foundation pit support according to claim 9, characterized in that, The thickness of the secondary back rib of the square timber is greater than or equal to the width of the exposed portion of the water-stop steel plate.

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