A new type of foundation pit support structure

Abstract

The utility model discloses a new type foundation pit support structure in the technical field of foundation pit construction, including support column, the left and right sides of support column all are provided with rectangular compression -resistant mechanism and elastic buffer formula included angle support mechanism, the lower extreme fixed mounting of support column has concrete base, the front end fixed mounting of concrete base has pressure -bearing steel column, the right -hand member fixed mounting of concrete base has first connecting steel column, the left -hand member fixed mounting of concrete base has second connecting steel column, is provided with first bracing between pressure -bearing steel column and first connecting steel column, this new type foundation pit support structure adds rectangular compression -resistant mechanism and elastic buffer formula included angle support mechanism, and the rectangular compression -resistant mechanism realizes the strengthening of foundation bearing capacity through rigid three -dimensional truss, and the buffer system of elastic buffer formula included angle support mechanism promotes structural toughness, and the synergistic effect of both makes the comprehensive support efficiency of foundation pit included angle part improve greatly, and forms the complementary advantages in the control soil body displacement and energy dissipation aspect.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit construction technology, specifically a novel foundation pit support structure. Background Technology

[0002] An excavation pit is a temporary earthwork space excavated below ground level for the construction of building foundations, underground structures, or municipal engineering projects. Its depth and scope must meet the design requirements for construction operations and safety. Measures such as support structures, dewatering and drainage, and slope stabilization are needed to ensure the safety of the pit walls and the stability of the surrounding environment. Excavation pit support refers to the reinforcement and protection of the open surface formed by the excavation of the excavation pit through structural systems such as piles, underground continuous walls, anchors, and internal supports. This ensures the stability of the pit walls, controls soil deformation, prevents collapse and soil erosion, and, in conjunction with dewatering, drainage, and monitoring measures, ensures the safety of the excavation pit and surrounding buildings, structures, and pipelines.

[0003] Based on existing foundation pit engineering techniques, it has been found that in rectangular foundation pit structures, the angle between the foundation pit surfaces usually faces greater earth pressure and is more prone to soil collapse compared to the planar foundation pit surface. The angle leads to stress concentration in the soil at this location. Since the two foundation pit surfaces meet here, the lateral earth pressure is superimposed, forming a region with higher shear force, which significantly reduces the stability of the soil.

[0004] Based on this, the present invention designs a novel foundation pit support structure to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a novel foundation pit support structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel foundation pit support structure includes a support column. A rectangular compression-resistant mechanism and an elastic buffer-type angled support mechanism are provided on both the left and right sides of the support column. The rectangular compression-resistant mechanism includes a concrete base, a bearing steel column, a first connecting steel column, and a second connecting steel column. The concrete base is fixedly installed at the lower end of the support column, the bearing steel column is fixedly installed at the front end of the concrete base, the first connecting steel column is fixedly installed at the right end of the concrete base, and the second connecting steel column is fixedly installed at the left end of the concrete base. The elastic buffer-type angled support mechanism includes a first strut, a first limiting rod, and a second strut. The first strut is provided between the bearing steel column and the first connecting steel column. A first limiting rod is inserted into the interior of the first connecting steel column, and the second strut is fixedly installed at the lower end of the first limiting rod. The first strut, the first limiting rod, and the second strut form a triangular support structure.

[0008] Optionally, the rectangular compression-resistant mechanism further includes support rods, with support rods installed at both ends of the support column, and the support column is connected to the first connecting steel column and the second connecting steel column respectively through multiple sets of support rods.

[0009] Optionally, a first steel rod is inserted into the interior of the pressure-bearing steel column, and a second steel rod is inserted into the interior of the support column. A connecting rod is fixedly installed at the upper end of both the second and first steel rods, and the three connecting rods are distributed from top to bottom between the second and first steel rods.

[0010] Optionally, the elastic buffer angle support mechanism further includes a third support rod, a second limiting rod, and a fourth support rod. A third support rod is provided between the pressure-bearing steel column and the second connecting steel column. A second limiting rod is inserted into the interior of the second connecting steel column. A fourth support rod is fixedly installed at the lower end of the second limiting rod. The third support rod, the second limiting rod, and the fourth support rod form a triangular support structure.

[0011] Optionally, a first pad is fixedly installed at the front end of the first support rod, a first spring is fixedly installed at the front end of the first pad, and a first telescopic rod is installed inside the first spring.

[0012] Optionally, a first extension rod is fixedly installed at the lower end of the second support rod, a second pad is fixedly installed at the front end of the first extension rod, a second spring is fixedly installed at the front end of the second pad, a second telescopic rod is installed inside the second spring, and both the second spring and the first spring are installed on the bearing steel column.

[0013] Optionally, a third pad is fixedly installed at the front end of the third support rod, and a third spring is fixedly installed at the front end of the third pad. A second extension rod is fixedly installed at the lower end of the fourth support rod, and a fourth pad is fixedly installed at the front end of the second extension rod. A fourth spring is fixedly installed at the front end of the fourth pad.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, a rectangular anti-compression mechanism is provided. The four-column support structure (support column, concrete base, pressure-bearing steel column, first connecting steel column, and second connecting steel column) forms a rigid skeleton through a spatial three-dimensional layout. The concrete base serves as the foundation bearing body and effectively disperses the base reaction force. The vertical insertion design of the first and second steel rods enhances the bending stiffness of the column system. Multiple sets of support rods adopt an X-shaped cross connection method, which significantly improves the overall shear resistance of the structure. In particular, the prestressed support network is formed by pre-tightening installation in the early stage of foundation pit excavation, which effectively suppresses soil deformation.

[0016] 2. In this utility model, an elastic buffer-type angled support mechanism is provided. Two sets of triangular support structures form a cross-arranged diagonal bracing system. Four sets of spring buffer components ensure the overall stability of the structure. The unique "rigid-flexible combination" characteristic of this mechanism enables the support system to remain stable under sudden pressure, significantly improving seismic performance. Attached Figure Description

[0017] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional top view of the structure of this utility model;

[0019] Figure 3 This is a three-dimensional, bottom-view structural diagram of the present invention;

[0020] Figure 4 This is a three-dimensional right-view structural schematic diagram of the present invention;

[0021] Figure 5 This is a schematic diagram of the three-dimensional rear view structure of this utility model;

[0022] Figure 6 This is a three-dimensional sectional view of the present invention.

[0023] Figure 7 This utility model Figure 6 A magnified three-dimensional structural diagram of point A in the middle;

[0024] Figure 8 This utility model Figure 6 A magnified three-dimensional structural diagram of point B in the middle.

[0025] In the diagram: 1. Support column; 2. Rectangular compression-resistant mechanism; 201. Concrete base; 202. Bearing steel column; 203. First steel rod; 204. Connecting rod; 205. Second steel rod; 206. First connecting steel column; 207. Second connecting steel column; 208. Support connecting rod; 3. Elastic buffer type angled support mechanism; 301. First strut; 302. First limiting rod; 303. Second strut; 304. First pad; 305. First spring; 306. First telescopic rod; 307. First extension rod; 308. Second pad; 309. Second spring; 310. Second telescopic rod; 311. Third strut; 312. Second limiting rod; 313. Fourth strut; 314. Third pad; 315. Third spring; 316. Second extension rod; 317. Fourth pad; 318. Fourth spring. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] 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 protection scope of the present utility model.

[0029] Please see Figures 1-8In this embodiment of the utility model, a novel foundation pit support structure includes a support column 1. Rectangular compression-resistant mechanisms 2 and elastic buffer-type angled support mechanisms 3 are provided on both the left and right sides of the support column 1. The rectangular compression-resistant mechanism 2 includes a concrete base 201, a pressure-bearing steel column 202, a first connecting steel column 206, and a second connecting steel column 207. The lower end of the support column 1 is fixedly installed with the concrete base 201, the front end of the concrete base 201 is fixedly installed with the pressure-bearing steel column 202, the right end of the concrete base 201 is fixedly installed with the first connecting steel column 206, and the left end of the concrete base 201 is fixedly installed with... Equipped with a second connecting steel column 207, the rectangular compression-resistant mechanism 2 also includes a support rod 208. Support rods 208 are installed at both ends of the support column 1. The support column 1 is connected to the first connecting steel column 206 and the second connecting steel column 207 respectively through multiple sets of support rods 208. A first steel rod 203 is inserted into the inside of the pressure-bearing steel column 202, and a second steel rod 205 is inserted into the inside of the support column 1. Connecting rods 204 are fixedly installed at the upper ends of the second steel rod 205 and the first steel rod 203. The three connecting rods 204 are distributed from top to bottom between the second steel rod 205 and the first steel rod 203.

[0030] The rectangular compression-resistant mechanism 2 adopts a four-column support structure and a multi-link connection structure, which effectively improves the compression resistance of this support structure. The four-column support structure consists of support column 1, concrete base 201, bearing steel column 202, first steel rod 203, connecting rod 204, second steel rod 205, first connecting steel column 206, and second connecting steel column 207. The multi-link connection structure consists of support connecting rod 208. During installation, it is necessary to pre-fix the support column 1, bearing steel column 202, first connecting steel column 206, and second connecting steel column 207. The support column 1, the bearing steel column 202, the first connecting steel column 206 and the second connecting steel column 207 are positioned at the corner of the foundation pit to ensure their installation positions. Then, reinforced concrete, i.e., concrete base 201, is placed at the lower end. Subsequently, multiple sets of connecting rod structures are installed, and the support column 1, the first connecting steel column 206 and the second connecting steel column 207 are rigidly connected by multiple support connecting rods 208. During daily support, the rectangular anti-compression mechanism 2 bears the soil pressure near the corner of the foundation pit, which can effectively cope with the higher pressure at the corner of the foundation pit.

[0031] The elastic buffer type angle support mechanism 3 includes a first support rod 301, a first limiting rod 302, and a second support rod 303. The first support rod 301 is provided between the pressure-bearing steel column 202 and the first connecting steel column 206. The first limiting rod 302 is inserted into the inside of the first connecting steel column 206. The second support rod 303 is fixedly installed at the lower end of the first limiting rod 302. The first support rod 301, the first limiting rod 302, and the second support rod 303 form a triangular support structure. The elastic buffer type angled support mechanism 3 also includes a third support rod 311, a second limiting rod 312, and a fourth support rod 313. The third support rod 311 is disposed between the pressure-bearing steel column 202 and the second connecting steel column 207. The second limiting rod 312 is inserted into the interior of the second connecting steel column 207. The lower end of the second limiting rod 312 is fixedly installed with the fourth support rod 313. The third support rod 311, the second limiting rod 312, and the fourth support rod 313 form a triangular support structure. The structure includes a first support rod 301 with a first pad 304 fixedly installed at its front end, a first spring 305 fixedly installed at its front end, a first telescopic rod 306 installed inside the first spring 305, a first extension rod 307 fixedly installed at the lower end of the second support rod 303, a second pad 308 fixedly installed at the front end of the first extension rod 307, a second spring 309 fixedly installed at the front end of the second pad 308, a second telescopic rod 310 installed inside the second spring 309, and both the second spring 309 and the first spring 305 are installed on the bearing steel column 202, a third pad 314 fixedly installed at the front end of the third support rod 311, a third spring 315 fixedly installed at the front end of the third pad 314, a second extension rod 316 fixedly installed at the lower end of the fourth support rod 313, a fourth pad 317 fixedly installed at the front end of the second extension rod 316, and a fourth spring 318 fixedly installed at the front end of the fourth pad 317.

[0032] The elastic buffer angle support mechanism 3 adopts multiple sets of triangular support structures and elastic buffer structures, which effectively improves the compressive and seismic resistance of this support structure. The multiple sets of triangular support structures and elastic buffer structures are matched with each other to form a cross-arranged buffer spring group, which can effectively cope with the pressure from the angle of the foundation pit. During installation, there is no need to use a large number of bolts for fastening. The first connecting steel column 206 and the second connecting steel column 207 are provided with snap-fit ​​grooves. During installation, it is only necessary to install the multiple sets of triangular support structures on the first connecting steel column 206 and the second connecting steel column 207 in sequence. In order to ensure that the elastic buffer structure can effectively play its elastic buffer function, the corresponding telescopic rods (including multiple sets of first telescopic rods 306 and second telescopic rods 310) need to be welded to the pressure-bearing steel column 202 to ensure the connection strength. Moreover, the number of elastic buffer angle support mechanisms 3 can be determined according to the actual situation.

[0033] The working principle of this utility model is as follows: This novel foundation pit support structure achieves efficient response to the concentrated soil pressure and superimposed shear force at the corner of the foundation pit through the synergistic action of the rectangular anti-compression mechanism 2 and the elastic buffer angle support mechanism 3. During the construction phase, the support column 1 is rigidly fixed to the bottom of the foundation pit through the concrete base 201. The support column 1, the pressure-bearing steel column 202, the first connecting steel column 206 and the second connecting steel column 207 are distributed in a four-column manner around the corner of the foundation pit, and form a rigid frame through multiple sets of support connecting rods 208. When the soil pressure acts on the corner, the four-column structure (support column 1, pressure-bearing steel column 202, first connecting steel column 206 and second connecting steel column 207) realizes the layered transfer of load, dispersing the concentrated stress to the concrete base 201 and the surrounding support structure. At the same time, when a sudden load occurs, multiple sets of first springs 305, second springs 309, third springs 315 and fourth springs 318 cooperate with the corresponding telescopic rods to form a multi-level buffer mechanism to achieve phased absorption of energy.

[0034] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new type of foundation pit support structure comprising a support column (1), characterized in that: The support column (1) is provided with a rectangular compression-resistant mechanism (2) and an elastic buffer-type angle support mechanism (3) on both the left and right sides. The rectangular compression-resistant mechanism (2) includes a concrete base (201), a pressure-bearing steel column (202), a first connecting steel column (206), and a second connecting steel column (207). The lower end of the support column (1) is fixedly installed with a concrete base (201), the front end of the concrete base (201) is fixedly installed with a pressure-bearing steel column (202), the right end of the concrete base (201) is fixedly installed with a first connecting steel column (206), and the left end of the concrete base (201) is fixedly installed with a first connecting steel column (206). The elastic buffer angle support mechanism (3) includes a first support rod (301), a first limiting rod (302), and a second support rod (303). The first support rod (301) is provided between the pressure-bearing steel column (202) and the first connecting steel column (206). The first limiting rod (302) is inserted into the inside of the first connecting steel column (206). The second support rod (303) is fixedly installed at the lower end of the first limiting rod (302). The first support rod (301), the first limiting rod (302), and the second support rod (303) form a triangular support structure.

2. A new type of foundation pit support structure according to claim 1, characterized in that: The rectangular anti-compression mechanism (2) also includes support rods (208). Support rods (208) are installed at both ends of the support column (1). The support column (1) is connected to the first connecting steel column (206) and the second connecting steel column (207) respectively through multiple sets of support rods (208).

3. A new type of foundation pit support structure according to claim 1, characterized in that: The pressure-bearing steel column (202) has a first steel rod (203) inserted inside, and the support column (1) has a second steel rod (205) inserted inside. The upper ends of the second steel rod (205) and the first steel rod (203) are fixedly installed with connecting rods (204). The three connecting rods (204) are distributed from top to bottom between the second steel rod (205) and the first steel rod (203).

4. The new type foundation pit support structure according to claim 1, characterized in that: The elastic buffer angle support mechanism (3) further includes a third support rod (311), a second limiting rod (312) and a fourth support rod (313). A third support rod (311) is provided between the pressure-bearing steel column (202) and the second connecting steel column (207). A second limiting rod (312) is inserted into the interior of the second connecting steel column (207). A fourth support rod (313) is fixedly installed at the lower end of the second limiting rod (312). The third support rod (311), the second limiting rod (312) and the fourth support rod (313) form a triangular support structure.

5. The novel foundation pit support structure according to claim 1, characterized in that: A first pad (304) is fixedly installed at the front end of the first support rod (301), a first spring (305) is fixedly installed at the front end of the first pad (304), and a first telescopic rod (306) is installed inside the first spring (305).

6. A new type of foundation pit support structure according to claim 4, characterized in that: The lower end of the second support rod (303) is fixedly installed with a first extension rod (307), the front end of the first extension rod (307) is fixedly installed with a second pad (308), the front end of the second pad (308) is fixedly installed with a second spring (309), the second spring (309) is installed with a second telescopic rod (310), and the second spring (309) and the first spring (305) are both installed on the pressure-bearing steel column (202).

7. The novel foundation pit support structure according to claim 4, characterized in that: The front end of the third support rod (311) is fixedly installed with a third pad (314), the front end of the third pad (314) is fixedly installed with a third spring (315), the lower end of the fourth support rod (313) is fixedly installed with a second extension rod (316), the front end of the second extension rod (316) is fixedly installed with a fourth pad (317), and the front end of the fourth pad (317) is fixedly installed with a fourth spring (318).

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