Foundation pit side wall overexcavation backfilling device

Abstract

The utility model relates to a foundation pit side wall overexcavation backfilling device, and aims to solve the problem of processing an overexcavation part of a foundation pit side wall in the process of excavating a deep foundation pit of a granite geological subway station. The device comprises an upper transverse rod, a lower transverse rod, a fixing structure, an upper buckle, a lower buckle, a main formwork, a side formwork and a bottom formwork, the upper transverse rod and the lower transverse rod are fixed to fender posts on the two sides of a foundation pit overexcavation position through the fixing structure, a formwork supporting frame is formed, and the formworks are fixed through the upper buckle and the lower buckle. And therefore, a space with five closed surfaces is constructed for pouring concrete. And the template can slide and be locked under the action of the upper buckle and the lower buckle, so that the template can be conveniently adjusted according to the size of the overexcavation part.

Description

TECHNICAL FIELD

[0001] The utility model belongs to subway construction equipment field, concretely is a kind of pit side wall overbreak backfilling device. BACKGROUND

[0002] In the deep foundation pit excavation process of granite geology subway station, granite at pit side wall often causes influence to foundation pit excavation, and large granite is difficult to break, and there is the risk of rolling down, so generally granite at pit side wall is taken down in whole, so that there is more overbreak part in pit side wall. Two ways are generally used in prior art to process pit side wall overbreak part, one is to use normal support way construction, does not carry out additional backfilling measure, due to the increase of local soil stress caused by foundation pit overbreak, the way has certain security risk, and when main body side wall construction, it will make main body high-grade concrete filling to overbreak part to cause material waste;Another way is to adopt the way of net spray backfilling, and the backfilling efficiency of this way is low, and rebound is serious after net spray material reaches certain thickness, leading to waste, and support strength is also difficult to guarantee.

[0003] The utility model provides a kind of pit side wall overbreak backfilling device, including fixed rod piece, anchor rod piece, support rod piece, formwork, connecting mechanism, and the low-grade concrete filling of pit overbreak part is carried out by easily installed formwork structure, both ensure pit side wall support strength, and reduce the waste of net spray concrete or building soil high-grade concrete. UTILITY MODEL CONTENTS

[0004] The utility model is directed to provide a kind of pit side wall overbreak backfilling device to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: A foundation pit side wall overbreak backfill device contains upper cross bar, lower cross bar, fixed structure, upper buckle, lower buckle, main template, side template and bottom template, wherein: The upper cross bar includes first connecting rod, is equipped with first sliding slot on the first connecting rod, and is equipped with a first through -hole in two ends of the first connecting rod respectively; The lower cross bar includes second connecting rod, is equipped with second sliding slot on the second connecting rod, and is equipped with a second through -hole in two ends of the second connecting rod respectively; The fixed structure includes fixed plate, is equipped with third through -hole in the center of fixed plate, is equipped with fixed ring on fixed plate, the fixed ring is composed of two clamping pieces, is equipped with fixed buckle sliding slot in the bottom of fixed ring, the fixed ring can slide in fixed buckle sliding slot, and one fixed buckle is equipped on the both sides of fixed ring respectively, is equipped with buckle bolt hole on the fixed buckle, and is equipped with a plurality of fixed bolts on fixed plate;The upper buckle includes first buckle rod, is equipped with side template sliding slot in the bottom of first buckle rod, is equipped with third sliding slot on first buckle rod, and the upper buckle can slide on the upper cross bar through third sliding slot, is equipped with first locking device on first buckle rod, is equipped with first pressing plate on the side of first locking device, and is installed with first locking bolt on first locking device;The lower buckle includes second buckle rod, is equipped with bottom template sliding slot on second buckle rod, is equipped with fourth sliding slot on second buckle rod, and the lower buckle can slide on the lower cross bar through fourth sliding slot, is equipped with second locking device on second buckle rod, is equipped with second pressing plate on the side of second locking device, and is installed with second locking bolt on second locking device.

[0006] As a preferred mode of the utility model, the width of the first sliding slot is the same as the thickness of the main template, and the width of the second sliding slot is the same as the thickness of the bottom template.

[0007] As a preferred mode of the utility model, the diameters of the second through -hole and the third through -hole are the same as that of the first through -hole.

[0008] As a preferred mode of the utility model, the inner side of the fixed ring is provided with a flexible protective pad.

[0009] As a preferred mode of the utility model, one side of the side template and the bottom template is further provided with a rubber pad.

[0010] As a preferred mode of the utility model, the upper part of the main template is further provided with a grouting port.

[0011] As a preferred mode of the utility model, one side of the main template is further provided with a plurality of rear supporting plates.

[0012] The foundation pit side wall overbreak backfill device provided by the utility model has the following beneficial effects:

[0013] The patent can effectively support and backfill the over-excavated part of the foundation pit side wall, avoids the increase of local soil stress caused by over-excavation, and improves the safety of construction.

[0014] The template in the patent adopts plug-in design, is convenient to install, and the plug-in depth of the side template and the bottom template is easily adjusted, and is more suitable for irregular surfaces of the foundation pit side wall without special treatment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the utility model;

[0016] Figure 2 It is a front view of the utility model;

[0017] Figure 3 It is a structure schematic view of the upper horizontal rod of the utility model;

[0018] Figure 4 It is a front view of the upper horizontal rod of the utility model;

[0019] Figure 5 It is a front view of the fixed structure of the utility model;

[0020] Figure 6 It is a right view of the fixed structure of the utility model;

[0021] Figure 7 It is a structure schematic view of the upper buckle of the utility model;

[0022] Figure 8 It is a left view of the upper buckle of the utility model;

[0023] Figure 9 It is a front view of the lower buckle of the utility model;

[0024] Figure 10 It is a right view of the lower buckle of the utility model;

[0025] Wherein: 1, the upper cross bar, 2, lower cross bar, 3, fixed structure, 4, upper buckle, 5, lower buckle, 6, main template, 7, side template, 8, bottom template, 11, first connecting rod, 12, first sliding slot, 13, first through hole, 21, second connecting rod, 22, second sliding slot, 23, second through hole, 31, fixed plate, 32, third through hole, 33, fixed ring, 34, fixed buckle, 35, third sliding slot, 36, buckle bolt, 37, fixed bolt, 38, buckle bolt hole, 41, first buckle rod, 42, main template sliding slot, 43, side template sliding slot, 44, first locking device, 45, first locking bolt, 46, first pressing plate, 51, second buckle rod, 52, bottom template sliding slot, 53, second locking device, 54, side template slot, 55, second locking bolt, 56, second pressing plate, 57, fourth sliding slot, 61, rear support plate, 62, grouting port, 71, side support rod, 81, bottom template slot, 82, bottom support rod. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] Please refer to Figures 1-9 , a specific embodiment of the utility model is:

[0028] As Figures 1-2 shown, a foundation pit side wall overbreak backfill device, including upper cross bar 1, lower cross bar 2, fixed structure 3, upper buckle 4, lower buckle 5, main template 6, side template 7, bottom template 8, the device is through fixed structure 3 and is fixed in the upper cross bar 1 and lower cross bar 2 on the two sides of the support pile of foundation pit overbreak, the upper cross bar 1 and lower cross bar 2 as template support frame respectively installs main template 6, side template 7, bottom template 8, through two upper buckles 4 and two lower buckles 5 to the template is fixed, to the template installation of foundation pit side wall overbreak, pours concrete into the template to reach the effect of backfilling of foundation pit side wall overbreak.

[0029] As Figure 3 shown, the upper cross bar 1 includes first connecting rod 11, first connecting rod 11 is equipped with first sliding slot 12, the width of first sliding slot 12 and the thickness of main template 6 match, for installing main template 6. First connecting rod 11 two ends are respectively equipped with one first through hole 13 and multiple bolt holes.

[0030] As Figure 4As shown, the lower crossbar 2 includes a second connecting rod 21, and a second sliding groove 22 is arranged on the second connecting rod 21, the width of the second sliding groove 22 matches the thickness of the bottom mold plate 8, and the bottom mold plate 8 is installed. A second through hole 23 and a plurality of bolt holes are arranged at both ends of the second connecting rod 22, and the diameter of the second through hole 23 is the same as that of the first through hole 13.

[0031] As shown in the figure, Figures 5-6 As shown, the main body of the fixing structure 3 is a fixing plate 31, and a third through hole 32 is arranged at the center of the fixing plate 31, and the diameter of the third through hole 32 is the same as that of the first through hole 13. A fixing ring 33 is arranged on the fixing plate 31, the fixing ring 33 is composed of two projection surfaces with semicircular arc clamping pieces, the diameter of the arc is smaller than the diameter of the third through hole 32, the inside of the clamping piece is provided with a flexible pad for increasing the contact area and friction, and the bottom of the two clamping pieces of the fixing ring 33 is provided with a fixing buckle sliding groove 35, and the fixing ring 33 can slide in the fixing buckle sliding groove 35. A fixing buckle 34 is arranged on each side of the fixing ring 33, a buckle bolt hole 38 is arranged on the fixing buckle 34, and the fixing ring 33 is tightened or loosened by rotating the buckle bolt 36. A plurality of fixing bolts 37 are arranged on the fixing plate 31, and the fixing bolts 37 are arranged at both ends of the first connecting rod 11 and the second connecting rod 21.

[0032] As shown in the figure, Figures 7-8 As shown, the main body of the upper buckle 4 is a first buckle rod 41, and a side mold plate sliding groove 42 is arranged at the bottom of the first buckle rod 41 for installing the side mold plate 7. A third sliding groove 43 is arranged on the first buckle rod 41, and the upper buckle 4 is installed on the upper crossbar 1 and slides through the third sliding groove 43. A first locking device 44 is arranged on the side of the first buckle rod 41, a first pressing plate 46 is arranged on the inside of the first locking device 44, a first locking bolt 45 is arranged on the first locking device 44, and the first pressing plate 46 is pushed towards the first connecting rod 11 installed in the third sliding groove 43 by rotating the first locking bolt 45. The friction between the first pressing plate 46 and the first connecting rod 11 plays a role in fixing the first buckle 4.

[0033] As shown in the figure, Figures 9-10As shown, the main body of the lower clip 5 is a second clip rod 51, which is provided with a bottom template slot 52 for mounting the bottom template 8. A fourth slot 57 is provided at the bottom of the second clip rod 51, through which the lower clip 5 can be mounted and slid on the lower crossbar 2. A second locking device 53 is provided at the bottom of the second clip rod 51. A second pressure plate 56 is provided inside the second locking device 53. A second locking bolt 55 is mounted on the second locking device 53. Screwing in the second locking bolt 55 pushes the second pressure plate 56 toward the second connecting rod 21 mounted in the fourth slot 57. The friction between the second pressure plate 56 and the second connecting rod 21 secures the second clip 5. A side template slot 54 is provided at the top of the second clip rod 51.

[0034] like Figures 1-10 As shown, before using this patent to fill and support the over-excavated area of ​​the foundation pit side wall, first select the retaining piles on both sides of the over-excavated area, select appropriate positions on the retaining piles according to the length of the upper crossbar 1 and the lower crossbar 2 to drill holes and plant reinforcement, install the four fixing structures 3 on both sides of the upper crossbar 1 and the lower crossbar 2 through the fixing bolts 37, install the upper crossbar 1 and the lower crossbar 2 on the retaining piles, make the reinforcement of the reinforcement planted on the retaining piles pass through the third through hole 32, tighten the snap bolt 36 to tighten the fixing snap 34 to fix it on the reinforcement. Insert the bottom template 8 into the second slide 22, slide and adjust the position of the two lower snaps 5 so that the bottom template 8 is at the over-excavated area of ​​the foundation pit side wall, and tighten the second locking bolt 55 to lock the two lower snaps 5. Insert the main formwork 6 into the first chute 12. Adjust the two upper clips 4 so that the main formwork 6 is positioned at the over-excavation of the foundation pit sidewall. Tighten the first locking device 44 to lock the two upper clips 4. Insert the side formwork 7 into the side formwork chute 42. Flexible rubber pads are provided on the side edges of the side formwork 7 and the bottom formwork 8 to better conform to the retaining structure surface of the foundation pit sidewall. The top edge of the bottom formwork is provided with a bottom formwork slot 81. The main formwork 6, side formwork 7, bottom formwork 8, and the foundation pit sidewall form a five-sided enclosed space for pouring concrete. The number of main formworks 6 is selected based on the size of the over-excavation of the foundation pit sidewall. Multiple main formworks 6 are secured together by multiple rear support plates 61. Grouting ports 62 are provided on the top of the main formwork 6 to facilitate concrete pouring. Side support rods 71 ​​are provided at the bottom of the side formwork 7, which are threadedly connected to the side formwork slots 54. A bottom support rod 82 is provided at the bottom of the main formwork 6, which is threadedly connected to the bottom formwork slots 81 provided on the bottom formwork 8.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit side wall over-excavation and backfilling device, characterized in that: The invention comprises an upper cross bar (1), a lower cross bar (2), a fixing structure (3), an upper buckle (4), a lower buckle (5), a main template (6), a side template (7) and a bottom template (8), wherein: the upper cross bar (1) comprises a first connecting rod (11), the first connecting rod (11) is provided with a first slide groove (12), and the first connecting rod (11) has a first through hole (13) at both ends; the lower cross bar (2) comprises a second connecting rod (21), the second connecting rod (21) is provided with a second slide groove (22), and the second connecting rod (21) is provided with a second through hole (13). A second through hole (23) is provided at each end of the rod (21); the fixing structure (3) comprises a fixing plate (31), a third through hole (32) is provided at the center of the fixing plate, a fixing ring (33) is provided on the fixing plate (31), the fixing ring (33) is composed of two clips, a fixing buckle slot (35) is provided at the bottom of the fixing ring (33), the fixing ring (33) can slide in the fixing buckle slot (35), a fixing buckle (34) is provided on each side of the fixing ring (33), and a buckle bolt is provided on the fixing buckle (34). The upper buckle (4) includes a first buckle rod (41), a side template slide groove (42) is provided at the bottom of the first buckle rod (41), a third slide groove (43) is provided on the first buckle rod (41), and the upper buckle (4) can slide on the upper cross bar (1) through the third slide groove (43), the first buckle rod (41) is provided with a first locking device (44), the side of the first locking device (44) is provided with a first pressing plate (46), and the first locking device (44) is provided with a first pressing plate (46). A first locking bolt (45) is installed; the lower buckle (5) includes a second buckle rod (51), a bottom template slide groove (52) is provided on the second buckle rod (51), a fourth slide groove (57) is provided on the second buckle rod (51), and the lower buckle (5) can slide on the lower cross bar (2) through the fourth slide groove (57), the second buckle rod (51) is provided with a second locking device (53), a second pressing plate (56) is provided on the side of the second locking device (53), and a second locking bolt (55) is installed on the second locking device (53).

2. The foundation pit sidewall over-excavation and backfilling device according to claim 1, characterized in that: The width of the first chute (12) is the same as the thickness of the main template (6), and the width of the second chute (22) is the same as the thickness of the bottom template (8).

3. The foundation pit side wall over-excavation and backfilling device according to claim 1, characterized in that: The diameters of the second through hole (23) and the third through hole (32) are the same as that of the first through hole (13).

4. The foundation pit side wall over-excavation and backfilling device according to claim 1, characterized in that: A flexible protective pad is provided on the inner side of the fixing ring (33).

5. The foundation pit side wall over-excavation and backfilling device according to claim 1, characterized in that: One side of the side template (7) and the bottom template (8) is also provided with a rubber pad.

6. The foundation pit sidewall over-excavation and backfilling device according to claim 1, characterized in that: The upper portion of the main template (6) is also provided with a grouting port (62).

7. The foundation pit side wall over-excavation and backfilling device according to claim 1, characterized in that: One side of the main template (6) is further provided with a plurality of rear support plates (61).

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