Inclined throwing support foundation pit supporting structure

Abstract

The utility model discloses an inclined throwing support foundation pit supporting structure which comprises enclosure row piles arranged on the inner periphery of a foundation pit in an enclosure mode, and first top beams are connected to the tops of the enclosure row piles. The multiple cast-in-place piles are arranged in the foundation pit in a driving mode in rows, the tops of the multiple cast-in-place piles are connected with a second top beam, and the top elevation of the second top beam is not higher than the top design elevation of the bottom plate; the multiple inclined throwing supports are connected between the first top beam and the second top beam at intervals; and the water stop plate is connected to the junction of the multiple inclined throwing supports and the design position of the bottom plate, the inclined throwing support foundation pit supporting structure is generally designed through the society, follow-up one-time pouring of the bottom plate is facilitated, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a sloping bracing foundation pit support structure. Background Technology

[0002] With social development, the construction of buildings at present is accompanied by the development and utilization of underground space. Therefore, foundation pit support projects are increasing, and the geological problems encountered are also growing. Some foundation pit projects, due to their deep excavation depth and poor soil conditions, require foundation pit reinforcement to prevent excessive deformation. For some projects, inclined bracing is chosen for foundation pit reinforcement because it is widely used in foundation pit support systems due to its advantages such as structural stability, simple layout, relatively short construction period, and relatively low cost, resulting in significant socio-economic benefits.

[0003] However, the inclined bracing requires a stable foundation. The traditional construction method is to use the basin excavation method to first remove the soil in the center of the foundation pit and construct the base slab in the middle of the foundation pit. One end of the inclined bracing is connected to the constructed base slab, and the other end is connected to the foundation pit retaining wall to form a reliable support. Then, the soil around the foundation pit is removed, and the base slab is constructed around the foundation pit. This construction method requires the construction of the base slab twice. There will inevitably be a construction joint between the two pours of the base slab, which will affect the waterproof performance of the base slab. At the same time, this construction method takes a long time and has poor construction efficiency. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a sloping bracing foundation pit support structure. By driving cast-in-place piles into the foundation pit and constructing a second cap beam on top of the cast-in-place piles for sloping bracing connection, a reliable connection foundation is provided. At the same time, when pouring the bottom slab later, the second cap beam can be poured in one go, which improves construction efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is a sloping bracing foundation pit support structure, comprising:

[0006] The retaining piles are arranged around the inner perimeter of the foundation pit, and the top of the retaining piles is connected to a first capping beam.

[0007] Multiple cast-in-place piles are driven in a row inside the foundation pit. The top of the multiple cast-in-place piles is connected to a second capping beam. The top elevation of the second capping beam is not higher than the top design elevation of the bottom slab.

[0008] Multiple inclined braces are connected at intervals between the first crown beam and the second crown beam;

[0009] A waterstop plate is connected at the junction of the multiple inclined braces and the designed position of the base plate.

[0010] A further improvement of this utility model's inclined support structure for foundation pits is that the first cap beam and the second cap beam are parallel.

[0011] A further improvement of this utility model's inclined support structure for foundation pits is that both the first cap beam and the second cap beam are connected with embedded parts for connecting the inclined supports.

[0012] A further improvement of this utility model's inclined bracing foundation pit support structure is that the embedded parts include:

[0013] A connecting plate is attached to the first cap beam or the second cap beam;

[0014] Multiple anchor bars, one end of which is connected at intervals to the side of the connecting plate facing the first cap beam or the second cap beam, and the other end is anchored in the first cap beam or the second cap beam;

[0015] Multiple bolts are connected at intervals to the side of the connecting plate opposite to the first or second crown beam. Both ends of the inclined brace are provided with multiple connecting holes for the multiple bolts to pass through.

[0016] A further improvement of this utility model's inclined bracing foundation pit support structure is that the waterstop plate is parallel to the pad layer of the bottom plate and welded to multiple inclined braces.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] 1. By driving cast-in-place piles into the foundation pit and constructing a second cap beam on top of the piles for inclined bracing connection, a reliable connection foundation is provided. At the same time, the second cap beam can be poured into the foundation slab in one go, improving construction efficiency.

[0019] 2. By installing a waterstop, the waterproof performance at the junction of the remaining diagonal bracing and the base slab is ensured after the subsequent base slab construction is completed and multiple diagonal bracing sections are partially cut off and removed. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the main structural view of the inclined support structure for the foundation pit of this utility model.

[0022] Figure 2This is a detailed structural drawing of the embedded parts of the inclined support structure for the foundation pit of this utility model.

[0023] In the diagram: 1. Retaining piles; 2. First capping beam; 3. Cast-in-place piles; 4. Second capping beam; 5. Diagonal bracing; 6. Waterstop plate; 7. Base plate; 8. Embedded parts; 801. Connecting plate; 802. Anchor bars. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0025] The following description, in conjunction with the accompanying drawings and specific embodiments, provides a more detailed explanation of the inclined support structure for foundation pits of this utility model.

[0026] Please see Figures 1-2 The inclined support structure for the foundation pit includes:

[0027] The retaining pile 1 is installed around the inner perimeter of the foundation pit, and the top of the retaining pile 1 is connected to the first cap beam 2.

[0028] Multiple cast-in-place piles 3 are driven in a row inside the foundation pit. The top of the multiple cast-in-place piles 3 is connected to a second cap beam 4. The top elevation of the second cap beam 4 is not higher than the top design elevation of the bottom slab 7.

[0029] Multiple inclined bracing 5 are connected at intervals between the first crown beam 2 and the second crown beam 4;

[0030] Waterstop 6 is connected at the junction of the multiple inclined braces 5 and the base plate 7 at the designed position.

[0031] By driving cast-in-place piles 3 into the foundation pit and constructing the second cap beam 4 on top of the cast-in-place piles 3 for connection of the inclined bracing 5, a reliable connection foundation is provided. At the same time, when pouring the base slab 7 later, the second cap beam 4 can be poured in one go, which improves construction efficiency.

[0032] Preferably, the first crown beam 2 is parallel to the second crown beam 4.

[0033] By setting the first crown beam 2 and the second crown beam 4 to be parallel to each other, the vertical distance between them is equal, which makes it easier to prefabricate multiple inclined braces 5 to the same length, thus facilitating construction.

[0034] Preferably, both the first crown beam 2 and the second crown beam 4 are connected to embedded parts 8 for connecting the inclined brace 5.

[0035] By setting the embedded part 8, the connection stability of the inclined brace 5 between the first crown beam 2 and the second crown beam 4 is ensured.

[0036] Preferably, the embedded part 8 includes:

[0037] A connecting plate 801 is attached to the first crown beam 2 or the second crown beam 4;

[0038] Multiple anchor bars 802, one end of each anchor bar 802 is connected at intervals to one side of the connecting plate 801 facing the first crown beam 2 or the second crown beam 4, and the other end is anchored in the first crown beam 2 or the second crown beam 4;

[0039] Multiple bolts are connected at intervals to one side of the connecting plate 801 opposite to the first crown beam 2 or the second crown beam 4. Both ends of the inclined brace 5 are provided with multiple connecting holes for the multiple bolts to pass through.

[0040] By setting multiple anchor bars, it is easy to connect the connecting plate 801 to the first crown beam 2 or the second crown beam 4. In addition, multiple bolts are set to facilitate the mechanical connection of the inclined brace 5 between the first crown beam 2 and the second crown beam 4, thereby improving the connection stability.

[0041] Preferably, the waterstop 6 is parallel to the padding layer of the base plate 7 and welded to the plurality of diagonal braces 5.

[0042] By welding the waterstop 6 onto the inclined brace 5, the waterstop 6 can be embedded in the base slab 7 during subsequent pouring. After the portions of the multiple inclined braces 5 above the base slab 7 are subsequently cut off and removed, the waterstop 6 improves the waterproofing performance at the junction of the remaining inclined braces 5 and the base slab 7.

[0043] A support method for the above-mentioned inclined bracing 5 foundation pit support structure:

[0044] Retaining piles 1 are driven into the outer perimeter of the designed location of the foundation pit, and multiple cast-in-place piles 3 are driven into the designed location of the foundation pit, so that the multiple cast-in-place piles 3 are parallel to the retaining piles 1 on the corresponding side.

[0045] After the retaining piles 1 and the cast-in-place piles 3 reach the design strength, the foundation pit is excavated. Except for the soil near the inner wall of the foundation pit, all other soil is removed.

[0046] A first crown beam 2 is constructed on top of the retaining pile 1, and a second crown beam 4 is constructed on top of multiple cast-in-place piles 3. Multiple inclined bracing 5 are connected at intervals between the first crown beam 2 and the second crown beam 4.

[0047] Waterstop 6 is installed at the junction of the multiple inclined bracing 5 and the base plate 7 at the designed location;

[0048] The soil near the inner walls of the foundation pit is excavated and the bottom slab 7 is poured in one go, and the waterstop 6 is poured inside.

[0049] After the base plate 7 reaches its design strength, the portions of the multiple inclined bracing 5 located above the base plate 7 are cut off and removed.

[0050] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.

Claims

1. A batter braced foundation pit support structure, characterised in that, include: The retaining piles are arranged around the inner perimeter of the foundation pit, and the top of the retaining piles is connected to a first capping beam. Multiple cast-in-place piles are driven in a row inside the foundation pit. The top of the multiple cast-in-place piles is connected to a second capping beam. The top elevation of the second capping beam is not higher than the top design elevation of the bottom slab. Multiple inclined braces are connected at intervals between the first crown beam and the second crown beam; A waterstop plate is connected at the junction of the multiple inclined braces and the designed position of the base plate.

2. The batter racking foundation support structure according to claim 1, wherein, The first crown beam is parallel to the second crown beam.

3. The batter raker supported excavation structure in accordance with claim 1, wherein, Both the first and second crown beams are connected to embedded parts for the connection of the inclined bracing.

4. The batter raking supported excavation structure in accordance with claim 3, wherein, The embedded parts include: A connecting plate is attached to the first cap beam or the second cap beam; Multiple anchor bars, one end of which is connected at intervals to the side of the connecting plate facing the first cap beam or the second cap beam, and the other end is anchored in the first cap beam or the second cap beam; Multiple bolts are connected at intervals to the side of the connecting plate opposite to the first or second crown beam. Both ends of the inclined brace are provided with multiple connecting holes for the multiple bolts to pass through.

5. The batter racking foundation support structure according to claim 1, wherein The waterstop plate is parallel to the padding layer of the base plate and welded to the multiple inclined braces.

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