A deep foundation pit supporting structure

Abstract

The utility model discloses a deep foundation pit support structure relates to deep foundation pit support technical field. Its structure includes locating plate no.

Description

Technical Field

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

[0002] In the field of underground engineering construction, deep foundation pit excavation and support are crucial links in ensuring construction safety and the stability of the surrounding environment. With the increase in urban building density and the deepening development and utilization of underground space, deep foundation pit projects face more complex geological conditions and more stringent construction requirements. As an important measure to ensure the stability of the foundation pit and prevent deformation or collapse of the surrounding soil, the design rationality and construction effectiveness of the deep foundation pit support structure directly affect the safety and quality of the entire project.

[0003] Traditional deep foundation pit support methods often employ pile foundations, diaphragm walls, and soil nailing walls. While these methods can meet the needs of foundation pit support to a certain extent, they also have limitations. For example, pile foundations and diaphragm walls are costly and time-consuming to construct, and have certain requirements regarding geological conditions; soil nailing walls are more suitable for shallow foundation pits or sites with relatively good soil quality, and their effectiveness is limited for deep and large foundation pits or complex geological conditions. Furthermore, traditional support methods also face challenges in controlling foundation pit deformation and improving support efficiency.

[0004] In existing technologies, some deep foundation pit support structures use curved or flat plates placed on the inner wall of the pit and supported by struts. However, these structures often suffer from insufficient support strength and poor stability. Especially in soft soil foundations or deep and large foundation pits, traditional support structures are unable to effectively resist the effects of soil and water pressure, easily leading to excessive deformation of the foundation pit or even collapse. Furthermore, the installation and adjustment of existing support structures are cumbersome, affecting construction efficiency.

[0005] Therefore, developing a new type of deep foundation pit support structure with higher support strength, better stability and adaptability, and simpler installation and adjustment methods has become an urgent technical problem to be solved in the field of underground engineering construction.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this utility model is to provide a deep foundation pit support structure that achieves stable support through the dual action of mechanical force and gravity, aiming to improve the safety and efficiency of deep foundation pit support and promote the advancement of underground engineering construction technology.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] This utility model relates to a deep foundation pit support structure, comprising a first positioning plate, a second positioning plate, a movable base, and a support mechanism. The movable base is slidably mounted on the first positioning plate via two sets of countersunk bolts with round heads. The upper end of the support mechanism is hinged to the second positioning plate, and the lower end of the support mechanism is hinged to the movable base. It also includes a jack, a counterweight, and a positioning socket. The jack is mounted on the first positioning plate, with its base resting on the first positioning plate and its telescopic end resting on the movable base. The positioning socket passes through the first positioning plate and rests on it. The counterweight rests on the positioning socket.

[0010] As a preferred embodiment of this utility model, the positioning plate includes a first rectangular plate; two parallel rectangular upright plates are fixed to the front half of the middle part of the upper surface of the first rectangular plate; the two rectangular upright plates are provided with an oval through hole that slides with the head of the round-headed countersunk bolt; the movable base is slidably installed between the two rectangular upright plates; a limiting baffle that cooperates with the jack base is fixed to the rear half of the middle part of the upper surface of the first rectangular plate; the first rectangular plate is provided with two rows of positioning holes.

[0011] As a preferred embodiment of this utility model, the second positioning plate includes a second rectangular plate; the back of the second rectangular plate is fixed with positioning spikes arranged in a rectangular array.

[0012] As a preferred embodiment of this utility model, the movable base includes a rectangular block base; two threaded blind holes are respectively opened on both sides of the rectangular block base to be threadedly connected with the round-head countersunk bolts.

[0013] As a preferred embodiment of this utility model, the counterweight is a cast iron block or a reinforced concrete block; a lifting ring is provided at each of the four corners of the upper end of the counterweight; and a channel is provided in the middle of the lower end of the counterweight to accommodate and operate the jack and the support mechanism.

[0014] As a preferred embodiment of this utility model, the positioning socket includes a U-shaped plate; two rows of rods that cooperate with the positioning holes are fixed on the lower surface of the U-shaped plate.

[0015] As a preferred embodiment of this utility model, four positioning plugs are fixed on the upper surface of the U-shaped plate; four positioning blind holes that cooperate with the positioning plugs are opened at the lower end of the counterweight.

[0016] As a preferred embodiment of this utility model, the positioning plug is provided with a through hole that extends radially through it.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model introduces jacks to precisely adjust the movable base, enabling the support mechanism to achieve the optimal support angle and force, thereby significantly enhancing the overall stability of the deep foundation pit support structure. The counterweight ballast design applies stable downward pressure to the positioning plate through its own weight, effectively improving the support force of the support structure on the sidewall of the deep foundation pit and preventing deformation or collapse of the foundation pit.

[0019] 2. The positioning socket of this utility model cooperates with the positioning hole on the positioning plate, and the positioning plug cooperates with the positioning blind hole at the lower end of the counterweight, so as to realize the precise positioning and stable fixation of the structure and reduce the deviation and uncertainty in the construction process.

[0020] 3. The support structure of this utility model can adapt to the support needs of deep foundation pits with different geological conditions and depths by adjusting the extension and retraction of the jacks and replacing the counterweights with different weights, and has wide applicability.

[0021] 4. The movable base of this utility model is slidably mounted on the positioning plate one using countersunk bolts with round heads. The support mechanism is hinged to both the positioning plate two and the movable base, making the installation and adjustment process of the entire structure simple and quick, thus improving construction efficiency. The lifting ring at the upper end of the counterweight ballast facilitates hoisting and installation, reducing safety risks during construction. Simultaneously, the through hole on the positioning plug can be used to insert a fixing pin, further preventing accidental movement of the counterweight ballast during construction and ensuring structural safety.

[0022] 5. Compared with traditional support methods, this utility model reduces unnecessary material consumption and structural redundancy through the dual action of mechanical force and gravity, thereby achieving structural optimization and material saving.

[0023] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying 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.

[0025] Figure 1 This is a schematic diagram of the deep foundation pit support structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the structure of this utility model when the counterweight ballast is removed.

[0027] Figure 3 for Figure 1 The front view.

[0028] Figure 4 for Figure 3 Sectional view at point AA.

[0029] Figure 5 This is a structural schematic diagram of positioning plate one.

[0030] Figure 6 This is a schematic diagram of the movable base.

[0031] Figure 7 This is a structural diagram of the support mechanism.

[0032] Figure 8 This is a schematic diagram of the counterweight ballast structure.

[0033] Figure 9 This is a structural diagram of the positioning socket.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1-Positioning plate one, 11-First rectangular plate, 12-Rectangular upright plate, 13-Oval through hole, 14-Limiting baffle, 15-Positioning insertion hole, 2-Positioning plate two, 21-Second rectangular plate, 22-Positioning spike, 3-Moving base, 31-Rectangular block base, 32-Threaded blind hole, 4-Supporting mechanism, 5-Jack, 6-Counterweight ballast, 61-Lifting ring, 62-Channel, 63-Positioning blind hole, 7-Positioning socket, 71-U-shaped plate, 72-Brick rod, 73-Positioning plug, 74-Round through hole, 8-Round head countersunk bolt. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Specific Implementation Example 1:

[0038] Please see Figure 1-9As shown, this utility model is a deep foundation pit support structure, including a positioning plate 1, a positioning plate 2, a movable base 3, a support mechanism 4, a jack 5, a counterweight 6, and a positioning socket 7. The movable base 3 is slidably mounted on the positioning plate 1 via two sets of round-head countersunk bolts 8. The upper end of the support mechanism 4 is hinged to the positioning plate 2. The lower end of the support mechanism 4 is hinged to the movable base 3, forming a stable triangular support structure that effectively disperses the pressure on the sidewalls of the foundation pit. The jack 5 is mounted on the positioning plate 1, with its base resting on the positioning plate 1 and its telescopic end resting on the movable base 3. By adjusting the telescopic amount of the jack 5, the position of the movable base 3 is precisely controlled, thereby adjusting the support angle and force of the support mechanism 4. The positioning socket 7 passes through the positioning plate 1 and sits on it. The counterweight 6 sits on the positioning socket 7. During installation, the positioning socket 7 is pre-inserted partially, and the crane lifts the counterweight 6 and places it on the positioning socket 7, then presses it completely into the ground.

[0039] The positioning plate 1 includes a first rectangular plate 11. Two parallel rectangular upright plates 12 are fixed to the front half of the middle of the upper surface of the first rectangular plate 11. Both rectangular upright plates 12 share a common oblong through hole 13 that slides with the head of a round-headed countersunk bolt 8. A movable base 3 is slidably installed between the two rectangular upright plates 12. A limiting baffle 14 that mates with the base of a jack 5 is fixed to the rear half of the middle of the upper surface of the first rectangular plate 11. The first rectangular plate 11 has two rows of positioning holes 15.

[0040] The positioning plate 2 includes a second rectangular plate 21. The back of the second rectangular plate 21 is fixed with a rectangular array of evenly arranged positioning spikes 22, which are easy to insert into the soil on the side wall of the foundation pit to enhance the fixing effect.

[0041] The movable base 3 includes a rectangular block base 31. Two threaded blind holes 32 are respectively opened on both sides of the rectangular block base 31 to engage with the round-head countersunk bolts 8, so as to realize the sliding connection with the positioning plate 1.

[0042] The counterweight 6 is a cast iron block or a reinforced concrete block, with sufficient weight to provide stable downward pressure. A lifting ring 61 is installed at each of the four corners of the upper end of the counterweight 6 for easy hoisting and installation. A passage 62 is provided in the middle of the lower end of the counterweight 6 to accommodate and operate the jack 5 and the support mechanism 4, facilitating operation by construction personnel.

[0043] The positioning socket 7 includes a U-shaped plate 71. Two rows of rods 72 that mate with the positioning holes 15 are fixed on the lower surface of the U-shaped plate 71 to ensure that the counterweight ballast 6 is accurately seated on the positioning plate 1.

[0044] Four positioning plugs 73 are fixed on the upper surface of the U-shaped plate 71. The lower end of the counterweight 6 has four positioning blind holes 63 that mate with the positioning plugs 73, further enhancing the stability of the structure.

[0045] The positioning plug 73 has a through hole 74 extending radially through it. During removal, a lifting ring and a pin are used to connect to the positioning plug 73, and a crane can be used to quickly remove the positioning socket 7.

[0046] One specific application of this embodiment is:

[0047] Install positioning plate:

[0048] Positioning plate 1 and positioning plate 2 are placed at predetermined positions at the bottom and sidewall of the deep foundation pit, respectively. Positioning plate 1 is placed in the soil at the bottom of the foundation pit, and positioning plate 2 is inserted into the soil on the sidewall of the foundation pit through the positioning spikes 22 on its back.

[0049] Install the movable base 3 and the supporting mechanism 4:

[0050] The movable base 3 is slidably installed between the two rectangular upright plates 12 of the positioning plate 1 using countersunk bolts 8. The upper end of the support mechanism 4 is hinged to the positioning plate 2 and the lower end is hinged to the movable base 3 to form a preliminary support structure.

[0051] Install jack 5:

[0052] Install the jack 5 on the positioning plate 1, ensuring that its base is against the limit baffle 14 and its telescopic end is against the movable base 3.

[0053] Install positioning socket 7 and counterweight 6:

[0054] Insert the pin 72 of the positioning socket 7 into the positioning hole 15 of the positioning plate 1 to ensure that the U-shaped plate 71 is firmly seated. Hoist the counterweight 6 onto the positioning socket 7 so that the positioning plug 73 is fully inserted into the positioning blind hole 63 at the lower end of the counterweight 6, thus completing the installation and fixing of the overall structure.

[0055] Adjust jack 5:

[0056] By operating jack 5, the position of the movable base 3 is adjusted so that the support mechanism 4 achieves the optimal support angle and force.

[0057] This embodiment achieves stable loading of the positioning plate 1 by designing jack 5, counterweight ballast 6, and positioning socket 7, significantly improving the support force and stability of the deep foundation pit support structure. Furthermore, this structure is easy to install and flexible to adjust, adaptable to different geological conditions and construction needs, and has broad application prospects.

[0058] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A deep foundation pit support structure, comprising a positioning plate one (1), a positioning plate two (2), a movable base (3), and a support mechanism (4); the movable base (3) is slidably mounted on the positioning plate one (1) by two sets of round-head countersunk bolts (8); the upper end of the support mechanism (4) is hinged to the positioning plate two (2); the lower end of the support mechanism (4) is hinged to the movable base (3); Its features are: It also includes a jack (5), a counterweight (6), and a positioning socket (7); The jack (5) is installed on the positioning plate (1), its base rests on the positioning plate (1), and its telescopic end rests on the movable base (3); The positioning socket (7) passes through the positioning plate (1) and sits on the positioning plate (1); the counterweight (6) sits on the positioning socket (7).

2. The deep foundation pit support structure according to claim 1, characterized in that, The positioning plate (1) includes a first rectangular plate (11); two parallel rectangular upright plates (12) are fixed in the middle front half of the upper surface of the first rectangular plate (11); the two rectangular upright plates (12) are provided with an oval through hole (13) that slides with the head of the round-head countersunk bolt (8); the movable base (3) is slidably installed between the two rectangular upright plates (12); a limiting baffle (14) that cooperates with the base of the jack (5) is fixed in the middle rear half of the upper surface of the first rectangular plate (11); the first rectangular plate (11) is provided with two rows of positioning holes (15).

3. The deep foundation pit support structure according to claim 2, characterized in that, The second positioning plate (2) includes a second rectangular plate (21); the back of the second rectangular plate (21) is fixed with positioning spikes (22) arranged in a rectangular array.

4. The deep foundation pit support structure according to claim 3, characterized in that, The movable base (3) includes a rectangular block base (31); two threaded blind holes (32) are respectively opened on both sides of the rectangular block base (31) to be threadedly connected to the round head countersunk bolts (8).

5. The deep foundation pit support structure according to claim 4, characterized in that, The counterweight (6) is a cast iron block or a reinforced concrete block; a lifting ring (61) is set at each of the four corners of the upper end of the counterweight (6); a channel (62) is opened in the middle of the lower end of the counterweight (6) for accommodating and operating the jack (5) and the support mechanism (4).

6. The deep foundation pit support structure according to claim 5, characterized in that, The positioning socket (7) includes a U-shaped plate (71); two rows of rods (72) that cooperate with the positioning socket (15) are fixed on the lower surface of the U-shaped plate (71).

7. The deep foundation pit support structure according to claim 6, characterized in that, Four positioning plugs (73) are fixed on the upper surface of the U-shaped plate (71); four positioning blind holes (63) that cooperate with the positioning plugs (73) are opened at the lower end of the counterweight (6).

8. The deep foundation pit support structure according to claim 7, characterized in that, The positioning plug (73) has a through hole (74) that runs through its radial direction.

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