An adjustable shear box for direct shear test of composite foundation with crushed stone piles

Abstract

This utility model provides an adjustable shear box for direct shear testing of crushed stone pile composite foundations, belonging to the technical field of shear box technology. It solves the technical problem that traditional shear boxes cannot flexibly adjust pile parameters, requiring repeated mold replacements or sample preparation, leading to reduced testing efficiency. An adjustable shear box for direct shear testing of crushed stone pile composite foundations includes a base with a support plate inside. Two T-shaped grooves are symmetrically formed on the top of the support plate, and multiple fixing plates are slidably connected inside the two T-shaped grooves. The fixing plates are arranged in pairs, and each pair of fixing plates has a fixing mechanism on its top for securing the fixing plates. Multiple third bolts are fitted with mold covers on their tops, and each mold cover has a threaded groove on its bottom, which cooperates with the third bolts. Multiple mold lower seats have a constraint mechanism on their tops for restraining the mold lower seats. In this utility model, the fixing plates ensure that the mold can be flexibly adjusted.

Description

Technical Field

[0001] This utility model belongs to the field of shear box technology, and relates to crushed stone pile composite foundation, especially an adjustable crushed stone pile composite foundation direct shear test shear box. Background Technology

[0002] With the acceleration of urbanization, soft soil foundation treatment has become one of the core challenges in the field of civil engineering. Crushed stone pile composite foundations, due to their advantages of low cost, convenient construction, and high bearing capacity, are widely used in the reinforcement of highway, railway, and building foundations. However, existing direct shear testing devices are mostly designed for homogeneous soils and cannot realistically simulate the complex mechanical properties of crushed stone pile composite foundations. The pile spacing, diameter, and arrangement of crushed stone piles significantly affect the shear strength of the foundation, but traditional shear boxes cannot flexibly adjust pile parameters, requiring repeated mold changes or sample preparation, leading to reduced testing efficiency. Therefore, this problem needs to be solved. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an adjustable shear box for direct shear testing of composite stone pile foundations. The technical problem this invention aims to solve is that traditional shear boxes cannot flexibly adjust pile parameters, requiring repeated mold replacements or sample preparation, which reduces testing efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable shear test box for direct shearing of crushed stone pile composite foundation includes a base with a support plate inside. Two T-shaped grooves are symmetrically formed on the top of the support plate, and multiple fixing plates are slidably connected inside the two T-shaped grooves. The fixing plates are arranged in pairs. Each pair of fixing plates has a fixing mechanism on its top for fixing the fixing plates. Multiple mold lower seats are slidably connected between each pair of fixing plates. A third bolt is fixedly connected to the top of each mold lower seat, and a mold upper cover is fitted to the top of each third bolt. A threaded groove is formed on the bottom of each mold upper cover, and the threaded groove cooperates with the third bolt. A constraint mechanism is provided on the top of each mold lower seat for restraining the mold lower seat. The fixing plates ensure that the mold can be flexibly adjusted.

[0005] As a further embodiment of this utility model, the fixing mechanism includes four second bolts, which are slidably connected to the top of the two fixing plates respectively, and the four second bolts are evenly arranged in a square shape. Multiple nuts are fixedly connected inside the two T-shaped grooves, and the multiple nuts are configured to cooperate with the second bolts. The support plate is provided with a first scale groove on the surface near the two T-shaped grooves, and the two fixing plates are configured to cooperate with the first scale grooves. The fixing plates can be fixed by the setting of the second bolts.

[0006] As a further embodiment of this utility model, the constraint mechanism includes two fourth bolts, both of which are rotatably connected to the top of the lower mold base. Each of the two fixing plates has a groove on its surface near the two fourth bolts, and the two fourth bolts are slidably connected inside the groove. Each of the two fixing plates has a second graduated groove on its surface near the two grooves, and the two second graduated grooves are mutually engaged with the lower mold base. A docking plate is fixedly connected to the top of the base, and the docking plate is square in shape. A lower box is slidably connected to the top of the docking plate. Four first bolts are arranged between the docking plate and the lower box, and the four first bolts are evenly arranged in a square shape. An upper box is provided on the top of the base. Horizontal load cells are provided on both sides of the lower box, and a vertical load cell is provided on the top of the upper box. The fourth bolts can constrain the lower mold base.

[0007] The beneficial effects of this utility model are as follows: 1. This utility model adopts a technical solution of fixing the lower mold base with a fixing plate, which ensures that the mold can be flexibly adjusted. This effectively solves the problem that traditional shearing boxes cannot flexibly adjust the pile parameters, requiring repeated mold replacement or sample preparation, which leads to reduced test efficiency. A second scale groove is also provided on the top of the fixing plate, so that the position of the lower mold base can be positioned and adjusted through the second scale groove. After the position is adjusted, the lower mold base can be fixed by the fourth bolt. The upper mold cover is installed on the top of the fourth bolt, and the upper mold cover is connected to the lower mold base by the third bolt, which can ensure that the upper mold cover can be quickly demolded. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of an adjustable shear box for direct shear test of a composite foundation with crushed stone piles proposed in this utility model. Figure 2 This is a schematic diagram of the internal structure of an adjustable shear box for direct shear test of a composite foundation with crushed stone piles proposed in this utility model. Figure 3 This is a partial structural schematic diagram of an adjustable shear box for direct shear testing of a composite foundation with crushed stone piles, as proposed in this utility model. Figure 4 This is a schematic diagram of the fixing mechanism of the adjustable crushed stone pile composite foundation direct shear test shear box proposed in this utility model; Figure 5 for Figure 4 A magnified structural diagram at point A in the diagram.

[0009] In the diagram: 1. Base; 2. Support plate; 3. Mold top cover; 101. Lower box; 102. Upper box; 103. Horizontal load cell; 104. Vertical load cell; 105. Connecting plate; 106. First bolt; 201. T-slot; 202. Nut; 203. First scale groove; 204. Fixing plate; 205. Second scale groove; 206. Slide groove; 207. Second bolt; 301. Threaded groove; 302. Third bolt; 303. Mold lower seat; 304. Fourth bolt. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0011] Reference Figure 1 - Figure 5 An adjustable shear box for direct shear testing of a composite foundation with crushed stone piles includes a base 1. A support plate 2 is installed inside the base 1. Two T-shaped grooves 201 are symmetrically opened on the top of the support plate 2. Multiple fixing plates 204 are slidably connected inside the two T-shaped grooves 201, and the fixing plates 204 are arranged in pairs. Each pair of fixing plates 204 has a fixing mechanism on its top for fixing the fixing plates 204. Multiple mold lower seats 303 are slidably connected between each pair of fixing plates 204. A third bolt 302 is fixedly connected to the top of each of the multiple mold lower seats 303. A mold upper cover 3 is fitted onto the top of each of the multiple third bolts 302. Threaded grooves 301 are opened on the bottom of each of the multiple mold upper covers 3, and the threaded grooves 301 and the third bolts 302 are mutually engaged. The setting of the third bolts 302 ensures that the mold upper cover 3 can be quickly demolded. The top of each of the multiple mold lower seats 303 is equipped with a constraint mechanism for restraining the mold lower seats 303. The setting of the fixing plates 204 ensures that the mold can be flexibly adjusted.

[0012] Preferably, the fixing mechanism includes four second bolts 207, which are slidably connected to the tops of the two fixing plates 204 respectively, and the four second bolts 207 are evenly arranged in a square shape. Multiple nuts 202 are fixedly connected inside the two T-shaped grooves 201, and the multiple nuts 202 are all configured to cooperate with the second bolts 207. The support plate 2 is provided with a first scale groove 203 on the surface near the two T-shaped grooves 201, and the two fixing plates 204 are configured to cooperate with the first scale groove 203. The fixing plates 204 can be fixed by the setting of the second bolts 207.

[0013] Preferably, the constraint mechanism includes two fourth bolts 304, both of which are rotatably connected to the top of the mold lower seat 303. Each of the two fixing plates 204 has a groove 206 on its surface near the two fourth bolts 304, and the two fourth bolts 304 are slidably connected inside the groove 206. Each of the two fixing plates 204 has a second scale groove 205 on its surface near the two grooves 206, and the two second scale grooves 205 are mutually engaged with the mold lower seat 303. The top of the base 1 is fixed. A docking plate 105 is connected, and the docking plate 105 is square in shape. A lower box 101 is slidably connected to the top of the docking plate 105. Four first bolts 106 are set between the docking plate 105 and the lower box 101, and the four first bolts 106 are evenly arranged in a square. An upper box 102 is set on the top of the base 1. Horizontal load cells 103 are set on both sides of the lower box 101, and a vertical load cell 104 is set on the top of the upper box 102. The lower mold base 303 can be constrained by the fourth bolt 304.

[0014] Working principle: A T-shaped groove 201 is provided on the top of the support plate 2, and the T-shaped groove 201 cooperates with the fixing plate 204. In use, the fixing plates 204 are placed in pairs inside the T-shaped grooves 201. The support plate 2 also has a first scale groove 203 on the side near the T-shaped grooves 201, so that the position of each group of T-shaped grooves 201 can be adjusted through the first scale groove 203. Multiple nuts 202 are installed inside the T-shaped grooves 201. After the position of each group of fixing plates 204 is ensured, one of the fixing plates 204 can be fixed by the second bolt 207. After the fixing is completed, the mold is lowered. 303 is inserted into the interior of one of the fixing plates 204. After the lower mold base 303 is placed, the other fixing plate 204 can be fixed. A second scale groove 205 is also provided on the top of the fixing plate 204, so that the position of the lower mold base 303 can be positioned and adjusted through the second scale groove 205. After the position is adjusted, the lower mold base 303 can be fixed by the fourth bolt 304. The upper mold cover 3 is installed on the top of the fourth bolt 304. The upper mold cover 3 is connected to the lower mold base 303 by the third bolt 302, so as to ensure that the upper mold cover 3 can be demolded quickly.

[0015] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An adjustable stone column composite foundation direct shear test shear box, comprising a base (1), characterized in that, The base (1) is provided with a support plate (2) inside. The support plate (2) has two T-shaped grooves (201) symmetrically opened on the top. Multiple fixing plates (204) are slidably connected inside the two T-shaped grooves (201). The multiple fixing plates (204) are arranged in pairs. Each group of fixing plates (204) is provided with a fixing mechanism for fixing the fixing plate (204) on the top. Multiple mold lower seats (303) are slidably connected between each group of fixing plates (204). A third bolt (302) is fixedly connected to the top of each of the multiple mold lower seats (303). A mold upper cover (3) is fitted to the top of each of the multiple third bolts (302). A threaded groove (301) is opened at the bottom of each of the multiple mold upper covers (3). The threaded groove (301) and the third bolt (302) are fitted together. A constraint mechanism for constraining the mold lower seat (303) is provided on the top of each of the multiple mold lower seats (303).

2. The adjustable stone column composite foundation direct shear test shear box of claim 1, wherein, The fixing mechanism includes four second bolts (207), which are slidably connected to the top of the two fixing plates (204) respectively, and the four second bolts (207) are evenly arranged in a square shape. Multiple nuts (202) are fixedly connected inside the two T-slots (201).

3. The adjustable stone column composite foundation direct shear test shear box of claim 2, wherein, Furthermore, multiple nuts (202) are configured to cooperate with the second bolt (207), and the support plate (2) is provided with a first scale groove (203) on the side surface near the two T-shaped grooves (201), and the two fixing plates (204) are configured to cooperate with the first scale groove (203).

4. The adjustable stone column composite foundation direct shear test shear box of claim 1, wherein, The constraint mechanism includes two fourth bolts (304), both of which are rotatably connected to the top of the mold base (303). The two fixing plates (204) have grooves (206) on the side surface near the two fourth bolts (304), and the two fourth bolts (304) are slidably connected inside the grooves (206).

5. The adjustable stone column composite foundation direct shear test shear box of claim 4, wherein, The two fixing plates (204) are provided with a second scale groove (205) on the side surface near the two slides (206), and the two second scale grooves (205) are configured to cooperate with the mold base (303).

6. The adjustable stone column composite foundation direct shear test shear box of claim 1, wherein, The base (1) is fixedly connected to a docking plate (105) at the top. The docking plate (105) is square in shape. The bottom box (101) is slidably connected to the top of the docking plate (105). Four first bolts (106) are provided between the docking plate (105) and the bottom box (101), and the four first bolts (106) are evenly arranged in a square shape. The base (1) is provided with an upper box (102) at the top. Horizontal load cells (103) are provided on both sides of the bottom box (101), and vertical load cells (104) are provided on the top of the upper box (102).

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