Enclosure structure for excavation of existing building basement

Abstract

The utility model relates to the technical field of existing building basement excavation, and discloses a building envelope for existing building basement excavation, which comprises a concrete base, a plurality of lower steel pipe piles are longitudinally pre-buried and fixed on the concrete base at intervals, and upper steel pipe piles are slidably sleeved outside the upper ends of the lower steel pipe piles. The lower steel pipe pile is fixedly connected with a fixed protection plate through a bottom block, the upper steel pipe pile is fixedly connected with a movable protection plate through a top block, the fixed protection plate and the movable protection plate are in sliding contact with each other, a guide rod is fixedly installed on the side portion of the fixed protection plate, the guide rod is sleeved with a side base in a sliding mode, and anchor rod assemblies are transversely arranged on the concrete base at intervals. The fixed guard plate is rotatably connected with a transmission stud through a connecting seat, the side seat is sleeved outside the transmission stud in a threaded manner, and a plurality of inserting columns are fixedly connected onto the side seat at intervals. And the use requirements of foundation pit guards with different depths can be conveniently met.

Description

Technical Field

[0001] The utility model relates to the technical field of excavation of basements of existing buildings. More specifically, the utility model relates to a retaining structure for excavation of basements of existing buildings. Background Technique

[0002] A foundation pit refers to the space below the ground excavated for the construction of the foundation and basement of a building (including a structure). A foundation pit belongs to a temporary construction project, and its function is to provide a space for the masonry operation of the foundation to be carried out at the designated position according to the design. When excavating the basement, a retaining structure needs to be equipped for the foundation pit to retain the soil and water on the pit wall. During the use of the existing retaining structure for basement excavation, due to the limitation of its own fixing structure, it is impossible to adjust the overall retaining height according to the actual depth of the foundation pit during basement excavation, resulting in difficulty in meeting the use requirements for retaining foundation pits of different depths and affecting the applicable effect of the retaining structure. In view of this, we propose a retaining structure for excavation of basements of existing buildings to solve the above problems. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a retaining structure for excavation of basements of existing buildings to solve the problems raised in the above background technique.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A retaining structure for excavation of basements of existing buildings includes a concrete base. A number of lower steel pipe piles are longitudinally pre-buried and fixed at intervals on the concrete base. An upper steel pipe pile is slidably sleeved outside the upper end of the lower steel pipe pile. The lower steel pipe pile is fixedly connected with a fixed retaining plate through a bottom block. The upper steel pipe pile is fixedly connected with a movable retaining plate through a top block. The fixed retaining plate and the movable retaining plate are in sliding contact with each other. A guide rod is fixedly installed on the side of the fixed retaining plate. A side seat is slidably sleeved outside the guide rod. Anchor rod assemblies are arranged horizontally at intervals on the concrete base. The fixed retaining plate is rotationally connected with a transmission screw through a connecting seat. The side seat is threadedly sleeved outside the transmission screw. A hand wheel is fixedly connected to the end of the transmission screw. A number of insertion posts are fixedly connected at intervals on the side seat. A number of outer holes are arranged at intervals on the side of the upper steel pipe pile. An inner opening is arranged on the side of the lower steel pipe pile. The insertion posts penetrate through the outer holes and extend into the inner opening.

[0006] As a preferred technical solution of the utility model, the anchor rod assembly includes a positioning anchor rod and a rotating head. A number of threaded sleeves are longitudinally pre-buried and fixed at intervals in the concrete base. The positioning anchor rod penetrates through and is threadedly connected to the threaded sleeve. The rotating head is fixedly connected to the end of the positioning anchor rod.

[0007] As a preferred technical solution of the present utility model, the number of the guide rods is two, and the two guide rods are symmetrically arranged.

[0008] As a preferred technical solution of the present utility model, a limiting stop block is fixedly connected to the end of the guide rod, and the cross-sectional shape of the limiting stop block is circular.

[0009] As a preferred technical solution of the present utility model, a plurality of guiding chutes are spaced apart on the side surface of the fixed guard plate, a supporting slider is fixedly connected to the upper steel pipe pile, and the supporting slider is slidably connected with the guiding chute.

[0010] As a preferred technical solution of the present utility model, a plurality of reinforcing blocks are fixedly arranged at intervals on the upper end of the concrete base, and the reinforcing blocks are fixedly connected to the bottom side of the fixed guard plate.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] In the present utility model, according to the actual foundation pit depth during the excavation of the basement of an existing building, when it is necessary to adjust the overall retaining height, the transmission screw is rotated forward by using a handwheel, driving the insertion column on the side seat to disengage from the outer hole and the inner port, and the upper steel pipe pile and the movable guard plate are longitudinally slid along the lower steel pipe pile and the fixed guard plate respectively until the retaining structure is adjusted to the required overall retaining height. Then, the transmission screw is rotated backward by using the handwheel, driving the insertion column to penetrate through the corresponding outer hole and extend into the inner port, thereby improving the flexibility of the retaining structure, facilitating the adjustment of the overall retaining height of the retaining structure, being able to conveniently meet the use requirements of retaining for foundation pits with different depths, and being beneficial to improving the application effect of the retaining structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the first sectional structural schematic diagram of a retaining structure for the excavation of the basement of an existing building according to the present utility model;

[0014] Figure 2 is the three-dimensional structural schematic diagram of a retaining structure for the excavation of the basement of an existing building according to the present utility model;

[0015] Figure 3 is Figure 2 the enlarged structural schematic diagram of part A in

[0016] Figure 4 is the second sectional structural schematic diagram of a retaining structure for the excavation of the basement of an existing building according to the present utility model.

[0017] In the figure: 1, concrete base; 101, threaded sleeve; 102, reinforcement block; 2, lower steel pipe pile; 201, bottom block; 3, upper steel pipe pile; 301, top block; 302, support slider; 4, fixed guard plate; 401, guide rod; 402, connecting seat; 403, drive screw; 404, handwheel; 405, limit stop; 406, guide chute; 5, movable guard plate; 6, side seat; 601, insertion post; 7, anchor bolt assembly; 701, positioning anchor bolt; 702, rotating head; 8, outer hole; 9, inner opening. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it is to be understood that the terms "longitudinal", "transverse", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0020] As Figures 1 to 4 shown, the present invention provides a retaining structure for the excavation of the basement of an existing building, including a concrete base 1, a plurality of lower steel pipe piles 2 are longitudinally pre-buried and fixed at intervals on the concrete base 1, an upper steel pipe pile 3 is slidably sleeved outside the upper end of the lower steel pipe pile 2, the lower steel pipe pile 2 is fixedly connected with a fixed guard plate 4 through a bottom block 201, the upper steel pipe pile 3 is fixedly connected with a movable guard plate 5 through a top block 301, the fixed guard plate 4 and the movable guard plate 5 are in sliding contact with each other, and the upper steel pipe pile 3 and the movable guard plate 5 can be longitudinally slid along the lower steel pipe pile 2 and the fixed guard plate 4 respectively until the retaining structure is adjusted to the required overall retaining height. A guide rod 401 is fixedly installed on the side of the fixed guard plate 4, a side seat 6 is slidably sleeved outside the guide rod 401, anchor bolt assemblies 7 are arranged transversely at intervals on the concrete base 1, the fixed guard plate 4 is rotatably connected with a drive screw 403 through a connecting seat 402, the side seat 6 is threadedly sleeved outside the drive screw 403, a handwheel 404 is fixedly connected to the end of the drive screw 403, a plurality of insertion posts 601 are fixedly connected at intervals on the side seat 6, a plurality of outer holes 8 are arranged at intervals on the side of the upper steel pipe pile 3, an inner opening 9 is arranged on the side of the lower steel pipe pile 2, and the insertion posts 601 penetrate through the outer holes 8 and extend into the inner opening 9, so that the upper steel pipe pile 3 is tightly fixed and positioned on the lower steel pipe pile 2.

[0021] Among them, Figure 2 As shown, the anchor rod assembly 7 includes a positioning anchor rod 701 and a rotating head 702. A plurality of threaded sleeves 101 are pre-buried and fixed at intervals in the concrete base 1. The positioning anchor rod 701 is threadedly connected to the threaded sleeve 101. The rotating head 702 is fixedly connected to the end of the positioning anchor rod 701. A screwing tool is sleeved on the outside of the rotating head 702, and the positioning anchor rod 701 is screwed and rotated along the threaded sleeve 101, so that the positioning anchor rod 701 is inserted into the soil layer of the pit wall, and the concrete base 1 can be firmly positioned.

[0022] Among them, Figure 1 As shown, there are two guide rods 401 , and the two guide rods 401 are symmetrically distributed, so that the guide rods 401 can play a stable guiding role for the side seat 6 .

[0023] Among them, Figure 2 As shown, the end of the guide rod 401 is fixedly connected to a limit stop 405, and the cross-sectional shape of the limit stop 405 is circular. The limit stop 405 can be used to block and limit the side seat 6 to prevent the side seat 6 from easily detaching from the guide rod 401.

[0024] Among them, Figure 3 As shown, a plurality of guide grooves 406 are spaced apart on the side of the fixed guard plate 4, and a support slider 302 is fixedly connected to the upper steel pipe pile 3. The support slider 302 is slidably connected to the guide groove 406. The support slider 302 can be used to further support the fixed guard plate 4.

[0025] Among them, Figure 4 As shown, a plurality of reinforcing blocks 102 are fixedly arranged at intervals on the upper end of the concrete base 1 , and the reinforcing blocks 102 are fixedly connected to the bottom side of the fixed guard plate 4 , thereby achieving the purpose of improving the installation structure stability of the fixed guard plate 4 .

[0026] The working principle of this utility model:

[0027] During the use of the retaining structure for basement excavation, a screwing tool is sleeved outside the rotating head 702, and the positioning anchor rod 701 is screwed and rotated along the threaded sleeve 101, so that the positioning anchor rod 701 is inserted into the soil layer of the pit wall, and the concrete base 1 can be stably positioned. According to the actual foundation pit depth during basement excavation, when it is necessary to adjust the overall retaining height, the handwheel 404 is used to rotate the transmission stud 403 forward, driving the insertion post 601 on the side seat 6 to disengage from the outer hole 8 and the inner port 9, and the upper steel pipe pile 3 and the movable retaining plate 5 are longitudinally slid along the lower steel pipe pile 2 and the fixed retaining plate 4 respectively until the retaining structure is adjusted to the required overall retaining height. Then, the handwheel 404 is used to rotate the transmission stud 403 in the reverse direction, driving the insertion post 601 to penetrate through the corresponding outer hole 8 and extend into the inner port 9.

[0028] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A retaining structure for the excavation of the basement of an existing building, including a concrete base (1), characterized in that: A number of lower steel pipe piles (2) are longitudinally embedded and fixed on the concrete base (1) at intervals. An upper steel pipe pile (3) is slidably sleeved outside the upper end of the lower steel pipe pile (2). The lower steel pipe pile (2) is fixedly connected with a fixed guard plate (4) through a bottom block (201). The upper steel pipe pile (3) is fixedly connected with a movable guard plate (5) through a top block (301). The fixed guard plate (4) and the movable guard plate (5) are in sliding contact with each other. A guide rod (401) is fixedly installed on the side of the fixed guard plate (4). A side seat (6) is slidably sleeved outside the guide rod (401). Anchor rod assemblies (7) are transversely arranged on the concrete base (1) at intervals. The fixed guard plate (4) is rotatably connected with a transmission screw rod (403) through a connecting seat (402). The side seat (6) is threadedly sleeved outside the transmission screw rod (403). The end of the transmission screw rod (403) is fixedly connected with a hand wheel (404). A number of insertion columns (601) are fixedly connected to the side seat (6) at intervals. A number of outer holes (8) are arranged on the side of the upper steel pipe pile (3) at intervals. An inner opening (9) is arranged on the side of the lower steel pipe pile (2). The insertion columns (601) penetrate through the outer holes (8) and extend into the inner opening (9).

2. The retaining structure for the excavation of the basement of an existing building according to claim 1, wherein: The anchor rod assembly (7) includes a positioning anchor rod (701) and a rotating head (702). A number of threaded sleeves (101) are transversely embedded and fixed in the concrete base (1) at intervals. The positioning anchor rod (701) passes through and is threadedly connected to the threaded sleeve (101). The rotating head (702) is fixedly connected to the end of the positioning anchor rod (701).

3. A retaining structure for excavation of the basement of an existing building according to claim 1, characterized in that: The number of the guide rods (401) is two, and the two guide rods (401) are symmetrically arranged.

4. The retaining structure for the excavation of the basement of an existing building according to claim 3, characterized in that: A limit stop block (405) is fixedly connected to the end of the guide rod (401), and the cross-sectional shape of the limit stop block (405) is circular.

5. The retaining structure for the excavation of the basement of an existing building according to claim 1, characterized in that: A number of guide chutes (406) are arranged on the side of the fixed guard plate (4) at intervals. A support slider (302) is fixedly connected to the upper steel pipe pile (3). The support slider (302) is slidably connected with the guide chutes (406).

6. The retaining structure for the excavation of the basement of an existing building according to claim 1, characterized in that: A number of reinforcing blocks (102) are fixedly arranged at intervals on the upper end of the concrete base (1). The reinforcing blocks (102) are fixedly connected to the bottom side of the fixed guard plate (4).

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