Deep foundation pit occlusion cast-in-place pile type foundation pit supporting structure

Abstract

The utility model relates to a deep foundation pit occlusion cast-in-place pile type foundation pit supporting structure, which belongs to the technical field of foundation pit supporting and comprises a building ground, two guide grooves are arranged on the front side of the building ground, and positioning mechanisms for conveniently mounting and supporting cast-in-place piles are arranged on the two guide grooves. Supporting mechanisms for supporting the foundation pit are arranged on the two guide grooves correspondingly, and a foundation pit body is formed in the front face of the building ground. According to the deep foundation pit occlusion cast-in-place pile type foundation pit supporting structure, through cooperation of the guide walls, the installation positions of cast-in-place piles can be positioned, so that accurate installation of the cast-in-place piles is facilitated, through cooperation of the first supporting plate and the second supporting plate, the internal distance and the position of the guide walls can be fixed, and the foundation pit supporting structure is convenient to use. And through cooperation of the reinforcing mesh and the first concrete, the position of the guide wall can be shaped, and therefore the guide wall can be detached for repeated use after the concrete is solidified.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a deep foundation pit bite cast-in-place pile type foundation pit support structure. Background Art

[0002] Bored interlocking piles refer to reinforced concrete "pile walls" formed by the interlocking of adjacent piles in a planar arrangement (the piles are interlocked in circle). They are used as deep foundation pit support structures for structures. Bored interlocking piles have become a very mature support structure construction technology in China. They have been widely promoted in deep foundation pit projects for urban structures such as subways, underpasses on roads, and high-rise buildings. They are particularly suitable for strata with adverse conditions such as silt, quicksand, and groundwater enrichment.

[0003] For example, China Utility Model Patent Publication No. (CN216615908U) discloses a bored interlocking cast-in-place pile type foundation pit support structure for the outer wall of a basement. The bored interlocking cast-in-place pile type foundation pit support structure for the outer wall of the basement includes a foundation, a concrete wall and bored interlocking cast-in-place piles are arranged above the foundation, the bored interlocking cast-in-place piles are located on one side of the concrete wall, and the concrete wall and the bored interlocking cast-in-place piles are in contact with each other, a plug rod is arranged on the outer wall of the bored interlocking cast-in-place pile away from the concrete wall, the plug rod passes through the bored interlocking cast-in-place pile and extends to the inside of the concrete wall, and a connecting rod is arranged on the side of the plug rod away from the bored interlocking cast-in-place pile The connecting block has a connecting rod on its outer wall, and a limit plug is provided on the side of the rod away from the connecting block. This practical solution solves the problem that currently, in order to enable the foundation pit support structure to be constructed together with the basement structure, most of the bored interlocking piles are constructed simultaneously with the underground structure. The inserted bars are reserved inside the bored interlocking piles so that the inserted bars are fixedly connected to the outer wall of the basement, but the effect of the inserted bars connecting the support structure and the basement structure is not ideal. However, in this patent, the inserted rod is driven into the cast-in-place pile, which can easily damage the cast-in-place pile, greatly reducing the stability and service life of the cast-in-place pile, and even causing fractures in severe cases, affecting practicality. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a deep foundation pit interlocking cast-in-place pile type foundation pit support structure, which has the advantages of making the cast-in-place piles have good stability while not affecting the use effect and life of the cast-in-place piles. It solves the problem in the patent that the cast-in-place piles are easily damaged by driving rods into the cast-in-place piles, which greatly reduces the stability and service life of the cast-in-place piles, and in severe cases may even break, affecting practicality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a deep foundation pit interlocking cast-in-place pile foundation pit support structure, comprising a building floor, two guide grooves are provided on the front of the building floor, positioning mechanisms for supporting the cast-in-place piles are provided on the two guide grooves, supporting mechanisms for supporting the foundation pit are provided on the two guide grooves, and a foundation pit body is provided on the front of the building floor;

[0006] The positioning mechanism includes a guide wall, a support member, and a shaping member. The guide wall is placed on the guide groove. The support member is arranged on the guide wall to fix the position and spacing of the guide wall. The shaping member is arranged on the guide groove to shape the installation position.

[0007] The beneficial effect of adopting the above further solution is that it is convenient to locate the installation positions of the cast-in-place piles on both sides of the foundation pit.

[0008] Furthermore, the guide wall is composed of a plurality of guide plates in an arc shape, and the plurality of guide plates are placed end to end in sequence so that the guide wall surrounds a closed space.

[0009] The beneficial effect of adopting the above further solution is that the guide walls can be spliced ​​and installed according to specific needs so that the guide walls can be formed into a required length.

[0010] Furthermore, the support member includes multiple first support plates and multiple second support plates, the multiple first support plates are all fixed to the inner side of the guide wall, and two are in a group, evenly distributed on the inner side of the guide wall, the two ends of the multiple second support plates are distributed on each group of first support plates, and the two ends of each second support plate are respectively fixed to the upper surface of each group of first support plates.

[0011] The beneficial effect of adopting the above further solution is: the size and shape of the guide wall are kept stable, and deformation due to external compression is avoided, which would affect the subsequent installation of the cast-in-place piles.

[0012] Furthermore, the shaping member includes a steel mesh and a first concrete, the outer side of the steel mesh is fixed to the inner side of the guide groove, the inner side of the steel mesh is fixed to the outer side of the guide wall, and the first concrete is cast between the inner side of the guide groove and the outer side of the guide wall.

[0013] The beneficial effect of adopting the above further solution is that a wall in the shape of a guide wall is formed in the guide groove, so that the cast-in-place piles can be supported when the cast-in-place piles are subsequently installed, thereby improving the stability of the cast-in-place piles.

[0014] Furthermore, the supporting mechanism includes multiple supporting parts and two enclosure parts. The rear inner wall of the guide groove is provided with multiple mounting hole grooves, and the multiple mounting hole grooves are staggered. The multiple supporting parts are arranged on the mounting hole grooves except the left and right ends, and the two enclosure parts are respectively arranged on the mounting hole grooves at the left and right ends.

[0015] The beneficial effect of adopting the above further solution is: improving the supporting effect of the deep foundation pit.

[0016] Furthermore, the supporting member includes two non-reinforced columns, a first steel cage, and a second concrete. The two non-reinforced columns are arranged on the inner side of the mounting hole groove, and are separated by a mounting hole groove in the middle. The first steel cage is arranged in the mounting hole groove in the middle position, and the second concrete is cast on the outer side of the first steel cage.

[0017] The beneficial effect of adopting the above further solution is to improve the support performance inside the deep foundation pit and maintain the stability inside the deep foundation pit.

[0018] Furthermore, the enclosure includes a second steel cage and mortar, the second steel cage is arranged inside the leftmost mounting hole groove, and the mortar is poured on the inner side of the second steel cage.

[0019] The beneficial effect of adopting the above further solution is that it is used to carry out closing treatment on the retaining piles.

[0020] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0021] 1. The deep foundation pit interlocking cast-in-place pile type foundation pit support structure can locate the installation position of the cast-in-place pile through the cooperation of the guide wall, so as to facilitate the accurate installation of the cast-in-place pile. The internal spacing and position of the guide wall can be fixed through the cooperation of the first support plate and the second support plate, so as to prevent the size of the guide wall from being offset and affecting the safety of the cast-in-place pile. The position of the guide wall can be fixed through the cooperation of the steel mesh and the first concrete, so that the guide wall can be disassembled and reused after the concrete solidifies.

[0022] 2. The deep foundation pit interlocking cast-in-place pile type foundation pit support structure can drill corresponding installation holes in the guide groove through the first concrete after being formed, so as to install the cast-in-place piles. Through the cooperation of the first steel cage and the second concrete, it can be interlocked with the two adjacent non-reinforced columns, thereby improving the stability of the cast-in-place piles and the supporting effect of the foundation pit. Through the cooperation of the second steel cage and mortar, it can be used for the closing treatment of the retaining piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the positioning mechanism of the utility model;

[0025] Figure 3 It is a schematic diagram of the support mechanism of the utility model;

[0026] Figure 4 It is a schematic diagram of the support member of the utility model;

[0027] Figure 5 It is a schematic diagram of the enclosure of the utility model.

[0028] In the figure: 1. building floor; 2. guide groove; 3. positioning mechanism; 31. guide wall; 32. support member; 321. first support plate; 322. second support plate; 33. shaping member; 331. steel mesh; 332. first concrete; 4. supporting mechanism; 41. supporting member; 411. non-reinforced column; 412. first steel cage; 413. second concrete; 42. enclosure; 421. second steel cage; 422. mortar; 43. mounting hole groove; 5. foundation pit body. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1 In this embodiment, a deep foundation pit interlocking cast-in-place pile foundation pit support structure includes a building ground 1, and two guide grooves 2 are opened on the front of the building ground 1. The two guide grooves 2 are provided with a positioning mechanism 3 for supporting the installation of cast-in-place piles, which is convenient for positioning the installation positions of the cast-in-place piles on both sides of the foundation pit. Support mechanisms 4 for supporting the foundation pit are provided on the two guide grooves 2 to improve the support effect of the deep foundation pit. A foundation pit body 5 is opened on the front of the building ground 1.

[0031] See also Figure 2 In order to facilitate the positioning of the installation positions of the cast-in-place piles on both sides of the foundation pit, the positioning mechanism 3 in this embodiment includes a guide wall 31, a support member 32, and a shaping member 33. The guide wall 31 is placed on the guide groove 2, and the support member 32 is arranged on the guide wall 31 to fix the position and spacing of the guide wall 31, so that the size and shape of the guide wall 31 remain stable, avoid deformation due to external compression, and affect the subsequent installation of the cast-in-place piles. The shaping member 33 is arranged on the guide groove 2 to shape the installation position so that a wall in the shape of the guide wall 31 is formed in the guide groove 2, so that the cast-in-place piles can be supported when the cast-in-place piles are installed later, thereby improving the stability of the cast-in-place piles.

[0032] In this embodiment, the support member 32 includes a plurality of first support plates 321 and a plurality of second support plates 322. The plurality of first support plates 321 are fixed to the inner side of the guide wall 31, and two are in a group, and are evenly distributed on the inner side of the guide wall 31 to support the length of the guide wall 31. Both ends of the plurality of second support plates 322 are distributed on each group of first support plates 321, and both ends of each second support plate 322 are respectively fixed to the upper surface of each group of first support plates 321 to support the width of the guide wall 31, so that the size of the guide wall 31 is The shape can be kept fixed, the shaping member 33 includes a steel mesh 331 and a first concrete 332, the outer side of the steel mesh 331 is fixed to the inner side of the guide groove 2, and the inner side of the steel mesh 331 is fixed to the outer side of the guide wall 31, so that the position of the guide wall 31 is fixed, and the first concrete 332 is poured between the inner side of the guide groove 2 and the outer side of the guide wall 31, so that the first concrete 332 can form the shape and size of the guide wall 31 after solidification. When the first concrete 332 is solidified and formed, the guide wall 31 is removed to facilitate the recycling of the guide wall 31.

[0033] It should be noted that the guide wall 31 is composed of a plurality of arc-shaped guide plates, which are placed end to end so that the guide wall 31 surrounds a closed space, so that the guide wall 31 can be spliced ​​and installed according to specific needs to form a required length.

[0034] See also Figure 3-5 In order to improve the supporting effect of the deep foundation pit, the supporting mechanism 4 in this embodiment includes multiple supporting parts 41 and two enclosure parts 42. The rear inner wall of the guide groove 2 is provided with multiple mounting hole grooves 43, and the multiple mounting hole grooves 43 are staggered. Multiple supporting parts 41 are arranged on the mounting hole grooves 43 except the left and right ends, so as to improve the supporting performance inside the deep foundation pit and maintain the stability inside the deep foundation pit. The two enclosure parts 42 are respectively arranged on the mounting hole grooves 43 at the left and right ends for closing the enclosure piles.

[0035] In this embodiment, the support member 41 includes two non-reinforced columns 411, a first steel cage 412, and a second concrete 413. The two non-reinforced columns 411 are both arranged on the inner side of the mounting hole groove 43, and there is a mounting hole groove 43 in the middle. The first steel cage 412 is arranged in the mounting hole groove 43 at the middle position. The second concrete 413 is poured on the outer side of the first steel cage 412. A mounting hole groove 43 is opened at the fixed position on the inner side of the first concrete 332 by a drilling machine, and then filler is filled into the mounting hole groove 43 to form a non-reinforced column 411, and then another mounting hole groove 43 is opened at an interval of one unit, and a non-reinforced column 411 is formed in the mounting hole groove 43. Column 411, and then open the installation hole groove 43 at the just separated unit. At this time, a part of the unsolidified non-reinforced column 411 on both sides is dug out. At this time, the first steel cage 412 is placed in the installation hole groove 43, and the second concrete 413 is poured. After it solidifies, it bites between the non-reinforced columns 411 on both sides, thereby improving stability. The enclosure 42 includes a second steel cage 421 and mortar 422. The second steel cage 421 is arranged inside the leftmost installation hole groove 43, and the mortar 422 is poured on the inner side of the second steel cage 421. The second steel cage 421 is placed in the installation hole groove 43 at the end, and the mortar 422 is poured, so that it is used for the closing treatment of the enclosure pile.

[0036] The working principle of the above embodiment is:

[0037] (1) First, a guide groove 2 is dug on the building ground 1, and then the guide wall 31 is placed inside the guide groove 2. After the guide wall 31 is placed, the first support plate 321 is installed on the inner side of the guide wall 31 to support the length of the guide wall 31, and then the second support plate 322 is installed on the first support plate 321 to support the width of the guide wall 31 so that the size and shape of the guide wall 31 can be kept fixed. Then, the steel mesh 331 is placed in the guide groove 2, and the steel mesh 331 is welded to the guide groove 2 and the guide wall 31 to fix the position of the guide wall 31. Then, the first concrete 332 is poured between the inner side of the guide groove 2 and the outer side of the guide wall 31 so that the first concrete 332 can form the shape and size of the guide wall 31 after solidification.

[0038] (2) After the first concrete 332 is solidified and formed, the guide wall 31 is removed to facilitate the recycling of the guide wall 31. Then, a mounting hole groove 43 is opened at the position where the first concrete 332 is formed by a drilling machine. Then, filler is filled into the inside to form a non-reinforced column 411. Then, another mounting hole groove 43 is opened at intervals. Similarly, a non-reinforced column 411 is formed in the mounting hole groove 43. Then, a mounting hole groove 43 is opened at the intervals. At this time, a part of the non-reinforced columns 411 on both sides that have not solidified is dug out. At this time, the first steel cage 412 is placed in the mounting hole groove 43, and the second concrete 413 is poured. After solidification, the first steel cage 412 and the second concrete 413 are interlocked with the non-reinforced columns 411 on both sides, thereby improving stability. The first steel cage 412 and the second concrete 413 are arranged in sequence at intervals, so that each reinforced column and the non-reinforced column 411 are interlocked together. Finally, the second steel cage 421 is placed in the mounting hole groove 43 at the end, and mortar 422 is poured to be used for the closing treatment of the retaining pile.

Claims

1. A deep foundation pit interlocking cast-in-place pile foundation pit support structure, comprising a building ground (1), characterized in that: Two guide grooves (2) are provided on the front of the building floor (1); positioning mechanisms (3) for supporting the installation of cast-in-place piles are provided on the two guide grooves (2); supporting mechanisms (4) for supporting the foundation pit are provided on the two guide grooves (2); and a foundation pit body (5) is provided on the front of the building floor (1); The positioning mechanism (3) comprises a guide wall (31), a support member (32), and a shaping member (33); the guide wall (31) is placed on the guide groove (2); the support member (32) is arranged on the guide wall (31) and is used to fix the position and spacing of the guide wall (31); and the shaping member (33) is arranged on the guide groove (2) and is used to shape the installation position.

2. A deep foundation pit interlocking cast-in-place pile foundation pit support structure according to claim 1, characterized in that: The guide wall (31) is composed of a plurality of guide plates in the shape of circular arcs, and the plurality of guide plates are placed end to end in sequence, so that the guide wall (31) surrounds a closed space.

3. A deep foundation pit interlocking cast-in-place pile foundation pit support structure according to claim 1, characterized in that: The support member (32) comprises a plurality of first support plates (321) and a plurality of second support plates (322); the plurality of first support plates (321) are all fixed to the inner side of the guide wall (31), and two are in a group and are evenly distributed on the inner side of the guide wall (31); both ends of the plurality of second support plates (322) are distributed on each group of first support plates (321), and both ends of each second support plate (322) are respectively fixed to the upper surface of each group of first support plates (321).

4. A deep foundation pit interlocking cast-in-place pile foundation pit support structure according to claim 1, characterized in that: The shaping member (33) comprises a steel mesh (331) and a first concrete (332); the outer side of the steel mesh (331) is fixed to the inner side of the guide groove (2); the inner side of the steel mesh (331) is fixed to the outer side of the guide wall (31); and the first concrete (332) is poured between the inner side of the guide groove (2) and the outer side of the guide wall (31).

5. The deep foundation pit interlocking cast-in-place pile foundation pit support structure according to claim 1 is characterized in that: The support mechanism (4) comprises a plurality of support members (41) and two enclosure members (42); a plurality of mounting hole slots (43) are provided on the rear inner wall of the guide slot (2); the plurality of mounting hole slots (43) are staggeredly distributed; the plurality of support members (41) are arranged on the mounting hole slots (43) except the left and right ends; and the two enclosure members (42) are respectively arranged on the mounting hole slots (43) at the left and right ends.

6. A deep foundation pit interlocking cast-in-place pile foundation pit support structure according to claim 5, characterized in that: The support member (41) comprises two non-reinforced columns (411), a first steel cage (412), and second concrete (413); the two non-reinforced columns (411) are both arranged on the inner side of the mounting hole groove (43) with a mounting hole groove (43) in between; the first steel cage (412) is arranged in the mounting hole groove (43) at the middle position; and the second concrete (413) is cast on the outer side of the first steel cage (412).

7. The deep foundation pit interlocking cast-in-place pile foundation pit support structure according to claim 5, characterized in that: The enclosure (42) comprises a second steel cage (421) and mortar (422), wherein the second steel cage (421) is arranged inside the leftmost mounting hole groove (43), and the mortar (422) is poured inside the second steel cage (421).

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