Underground supporting structure for resisting high liquid limit red clay

Abstract

The utility model relates to the technical field of clay foundation pit supporting, in particular to an underground supporting structure for resisting high liquid limit red clay, which comprises supporting plates, a plurality of supporting plates on the same side wall of a foundation pit are aligned up and down and left and right, and the supporting plates are attached to the outer wall of the foundation pit. The left side and the right side of each supporting plate are provided with a side edge protruding block and a side edge groove respectively, and the side edge protruding blocks and the side edge grooves in every two adjacent supporting plates are matched with each other. The supporting plates are attached to the side wall of the foundation pit, then the supporting plates are neatly attached to the side wall of the foundation pit through the side protruding blocks, the side grooves, the inserting blocks and the inserting openings, in the process, the upper supporting plate and the lower supporting plate are connected through the vertical plate, the vertical plate abuts against the ground of the foundation pit through the bottom plate and the inclined plate, and the foundation pit is supported in sequence. In the installation process, the supporting plates in the left direction and the right direction are flush with each other, in this way, all positions of the finally-built supporting structure are evenly stressed, and high-liquid-limit clay on the side wall of a foundation pit can be stably supported.

Description

TECHNICAL FIELD

[0001] The utility model belongs to clay foundation pit support technical field, concretely relates to a kind of underground support structure for resisting high liquid limit red clay. BACKGROUND

[0002] High liquid limit red clay is a kind of soil containing a higher proportion of clay minerals (such as kaolinite, montmorillonite, etc.), and its liquid limit value is relatively high. The liquid limit refers to the limit moisture content of soil when it changes from liquid to plastic state, reflecting the plasticity and viscosity of the soil.

[0003] In the underground support structure system for resisting soft plastic red clay with the publication number CN 217419655 U, it is disclosed that: a first underground support structure is arranged around the foundation pit, and a second underground support structure is arranged outside the first underground support structure. The second underground support structure is located in the red clay distribution area. The first underground support structure and the second underground support structure are arranged in parallel and closely adhere to each other, forming a double-layer underground support structure system. The first underground support structure and the second underground support structure both use underground continuous walls.

[0004] The above device uses a continuous wall formed by pouring to support the foundation pit of high liquid limit clay, which has the following problems:

[0005] High liquid limit clay has a loose structure and poor stability. During the pouring of concrete, the weight of the concrete raw materials will extrude the mold for pouring concrete, and the high liquid limit clay on the side wall of the foundation pit will also extrude the mold. The uneven force from both sides can easily cause the pouring mold to tilt, which results in an inclined wall with uneven thickness formed by pouring. The wall with different thicknesses or even skew at different positions has different load-bearing capacities, which poses a hidden danger to the support of the foundation pit. Therefore, the present application proposes an underground support structure for resisting high liquid limit red clay. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide an underground support structure for resisting high liquid limit red clay to solve the problems raised in the background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an underground support structure for resisting high liquid limit red clay, comprising a support plate, a plurality of support plates on the same side wall of the foundation pit are aligned vertically and horizontally, and the support plates are attached to the outer wall of the foundation pit.

[0008] The left and right sides of the support plate are respectively provided with side edge protrusions and side edge grooves, and the side edge protrusions and side edge grooves in adjacent two support plates cooperate with each other.

[0009] The side edge protrusion and the side edge groove are relatively movable, and the direction of movement is perpendicular to the outer wall of the foundation pit to which the support plate is attached;

[0010] The support plate is provided with an insertion block and an insertion opening at the upper end and the lower end respectively, the insertion block is matched with the insertion opening, and the direction of relative movement of the insertion block and the insertion opening is parallel to the direction of movement between the side edge protrusion and the side edge groove;

[0011] The vertical distribution of a plurality of the support plates is inserted into the square frame.

[0012] Preferably, the middle part of the side edge protrusion is provided with two symmetrically distributed triangular grooves.

[0013] Preferably, the insertion block is provided in the shape of an isosceles trapezoid, and the side length of the insertion block away from the support plate is longer than the side length of the insertion block close to the end of the insertion block.

[0014] Preferably, the support plate is provided with a guide frame, the guide frame is provided with two guide frames, and the two guide frames are symmetrically distributed along the center line of the vertical plate, and the guide frame is inserted into the insertion plate.

[0015] Preferably, the insertion plate comprises a tapered portion and a clamping area, the tapered portion is connected to the clamping area, the clamping area is in interference fit with the inner wall of the guide frame, and a plurality of insertion rods are mounted on the insertion plate.

[0016] Preferably, the vertical plate and the bottom plate are fixedly connected through bolts, the bottom plate is provided with an inclined plate, and the top end of the inclined plate is connected to the clamping block in the vertical plate through a movable ring assembly.

[0017] Preferably, the movable ring assembly is composed of two vertically inserted circular rings, a plurality of clamping blocks are equally spaced and arranged on the inclined plate, the bottom of the inclined plate is connected to a mounting seat, the mounting seat is connected to the bottom plate through bolts, and a plurality of equally spaced connecting holes are arranged on the bottom plate.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] Firstly, the support plate is attached to the side wall of the foundation pit, then the side edge protrusion, the side edge groove, the insertion block and the insertion opening are used to attach the plurality of support plates to the side wall of the foundation pit in order, the vertical plate is used to connect the upper and lower two support plates during the process, the vertical plate is abutted to the ground of the foundation pit through the bottom plate and the inclined plate, the foundation pit is supported in sequence, the left and right support plates are leveled during the installation process, the stress of the finally built support structure is uniform, and the high liquid limit clay on the side wall of the foundation pit can be stably supported.

[0020] Secondly, the insertion rod is inserted into the high liquid limit clay, and the insertion rod is connected to the support plate through interference, the insertion rod inserted into the high liquid limit clay can stabilize the surrounding clay, reduce the stress of the support plate and improve the stability of the foundation pit as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the underground supporting structure resisting high liquid limit red clay.

[0022] Figure 2 It is a structural schematic view of the underground supporting structure resisting high liquid limit red clay.

[0023] Figure 3 It is a structural schematic view of the supporting plate.

[0024] Figure 4 It is a structural schematic view of the supporting plate.

[0025] Figure 5 It is a structural schematic view of the supporting plate.

[0026] In the figure: 1, supporting plate; 101, side edge protruding block; 102, side edge recess; 103, insertion block; 104, insertion opening; 105, guide frame; 106, insertion plate; 1061, conical part; 1062, clamping area; 107, insertion rod; 109, vertical plate; 110, bottom plate; 111, inclined plate; 112, movable ring assembly; 113, clamping block. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] Referring to Figures 1-5 A kind of underground supporting structure for resisting high liquid limit red clay, including supporting plate 1, multiple supporting plate 1 on the same foundation pit side wall is aligned up and down, left and right, supporting plate 1 is attached on the outer wall of foundation pit, high liquid limit clay is a kind of clay, belongs to slope residual deposit in geologic genesis, lithology is gravel clay, it is the weathering product of volcanic clastic rock, and is mostly red brown, supporting plate 1 is attached to the outer wall of foundation pit, supports the high liquid limit clay of foundation pit side edge, avoids its collapse to the inside of foundation pit.

[0029] Because the length of the foundation pit is different, the longer support plate 1 is more troublesome during transportation, and the transportation cost is also higher, therefore the support plate 1 attached to the outer wall of the foundation pit is divided into an upper and lower and left and right spliced structure, specifically, the left and right sides of the support plate 1 are respectively provided with side edge protrusions 101 and side edge recesses 102, the side edge protrusions 101 and the side edge recesses 102 in the adjacent two support plates 1 cooperate with each other, and the middle part of the side edge protrusion 101 is provided with two symmetrically distributed triangular grooves;

[0030] The triangular groove in the middle of the side edge protrusion 101 allows it to move only forward and backward relative to the side edge recess 102 (with the Figure 1 The existence of the triangular groove allows multiple support plates 1 to bear force together when one side of the support plate 1 is subjected to force, so that the connected support plates 1 will not bend relative to each other, and multiple support plates 1 bear the pressure of high liquid limit clay at the foundation pit together, so that the bearing effect is better, and the stability of the combined support plate 1 is better;

[0031] The side edge recess 102 and the side edge protrusion 101 are connected in a plug-in manner, and the plug-in direction is perpendicular to the outer wall of the foundation pit to which it needs to be attached, that is, the side edge protrusion 101 and the side edge recess 102 can move relative to each other, and the moving direction is perpendicular to the outer wall of the foundation pit to which the support plate 1 is attached;

[0032] In a further embodiment, the support plate 1 is provided with an insertion block 103 and an insertion opening 104 at the upper and lower ends respectively, the insertion block 103 cooperates with the insertion opening 104, the insertion block 103 is in the shape of an isosceles trapezoid, and the side away from the support plate 1 is longer than the side close to the end of the insertion block 103, which can be referred to Figure 1 The two side surfaces of the insertion block 103 are inclined surfaces, and the two inclined surfaces cooperate with the corresponding insertion opening 104, when the two are plugged in, the existence of the inclined surfaces allows the two connected support plates 1 to move only forward and backward (with the Figure 1 The support plate 1 marked in the middle is an example) relative to each other, although multiple support plates 1 are connected in a combined manner, but when subjected to the pressure of high liquid limit clay on the side wall of the foundation pit, the whole is subjected to force, the relative moving direction of the insertion block 103 and the insertion opening 104 is parallel to the moving direction between the side edge protrusion 101 and the side edge recess 102.

[0033] The high-liquid-limit clay at the side wall of the foundation pit has poor stability, in order to improve the stability of the support plate 1, therefore, the guide frame 105 is installed on the support plate 1, the guide frame 105 is provided with two, and the two guide frames 105 are symmetrically distributed with the center line of the vertical plate 109, the plug plate 106 is inserted in the guide frame 105, the plug plate 106 includes a tapered portion 1061 and a clamping area 1062, the tapered portion 1061 is connected with the clamping area 1062, and the clamping area 1062 is in interference fit with the inner wall of the guide frame 105, a plurality of plug rods 107 are installed on the plug plate 106, the plug rods 107 are inserted into the high-liquid-limit clay, and a certain supporting effect is achieved, so that the connection between the support plate 1 and the side wall of the foundation pit is more tight, and relative displacement is not easy to occur, and the moving direction of the plug plate 106 during installation is the same as the moving direction of the side edge block 101 and the side edge groove 102 during connection, the moving directions of the above three are adjusted to the direction perpendicular to the side wall of the foundation pit, so that when the force is applied, it is always in the same direction, so that the installed support plate 1 and the side wall of the foundation pit are in the state of adhesion, and the upper and lower support plates 1 are flush, so that the subsequent component installation is more convenient.

[0034] The upper and lower support plates 1 are connected in a plug-in manner, and are easily displaced under the extrusion of the side wall of the foundation pit, in order to enable the upper and lower support plates 1 to bear force together, therefore, the vertical plate 109 is inserted in the square frame of the plurality of support plates 1, and the vertical plate 109 combines the upper and lower support plates 1 together, so that the upper and lower support plates 1 move simultaneously and bear force together.

[0035] The vertical plate 109 needs to be fixed, so as to avoid the overall movement of the support structure composed of the plurality of support plates 1, therefore, the vertical plate 109 is fixedly connected with the bottom plate 110 through bolts, the inclined plate 111 is installed on the bottom plate 110, the top end of the inclined plate 111 is connected with the clamping block 113 in the vertical plate 109 through the movable ring assembly 112, the movable ring assembly 112 is composed of two vertically plugged circular rings, the two circular rings in the movable ring assembly 112 can change direction as needed, so that the connection between the inclined plate 111 and the clamping block 113 is more convenient, the plurality of clamping blocks 113 are distributed at equal intervals, and the clamping block 113 is recessed, so that it will not be hindered during movement, correspondingly, the bottom of the inclined plate 111 is connected with the mounting seat, the mounting seat is connected with the bottom plate 110 through bolts, and the bottom plate 110 is provided with a plurality of equally spaced connecting holes.

[0036] Working principle:

[0037] The support plate 1 is adhered to the side wall of the foundation pit, then the plurality of support plates 1 support the high-liquid-limit clay on the side wall of the foundation pit in a direction perpendicular to the side wall of the foundation pit, the upper and lower support plates 1 are plugged and inserted into the corresponding vertical plate 109, so that the upper and lower support plates 1 bear force together, then the above operation is repeated, the upper support plate 1 is adhered in the foundation pit, and the support plates 1 jointly form a support structure to support the high-liquid-limit clay at the side wall of the foundation pit.

[0038] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. An underground support structure for resisting high liquid limit red clay, characterized in that: It includes a support plate (1), wherein a plurality of support plates (1) on the side wall of the same foundation pit are aligned vertically and horizontally, and the support plates (1) are attached to the outer wall of the foundation pit; The left and right sides of the support plate (1) are respectively provided with side protrusions (101) and side grooves (102), and the side protrusions (101) and side grooves (102) in two adjacent support plates (1) cooperate with each other; The side protrusion (101) and the side groove (102) can move relative to each other, and the direction of movement is perpendicular to the outer wall of the foundation pit to which the support plate (1) is attached; The support plate (1) is provided with an insert block (103) and a socket (104) at the upper and lower ends respectively. The insert block (103) cooperates with the socket (104). The relative movement direction of the insert block (103) and the socket (104) is parallel to the movement direction between the side protrusion (101) and the side groove (102). Vertical plates (109) are inserted into the square frames of the plurality of vertically distributed support plates (1).

2. The underground support structure for resisting high liquid limit red clay according to claim 1, characterized in that: Two symmetrically distributed triangular grooves are provided in the middle portion of the side protrusion (101).

3. The underground support structure for resisting high liquid limit red clay according to claim 1, characterized in that: The insert block (103) is configured to be in an isosceles trapezoidal shape, and the side of the insert block (103) away from the support plate (1) is longer than the side close to one end of the insert block (103).

4. The underground support structure for resisting high liquid limit red clay according to claim 1, characterized in that: A guide frame (105) is installed on the support plate (1). Two guide frames (105) are provided, and the two guide frames (105) are symmetrically distributed about the center line of the vertical plate (109). An inserting plate (106) is inserted into the guide frame (105).

5. The underground support structure for resisting high liquid limit red clay according to claim 4, characterized in that: The inserting plate (106) includes a tapered portion (1061) and a clamping area (1062). The tapered portion (1061) is connected to the clamping area (1062), and the clamping area (1062) is interference-fitted with the inner wall of the guide frame (105). A plurality of inserting rods (107) are installed on the inserting plate (106).

6. The underground support structure for resisting high liquid limit red clay according to claim 1, characterized in that: The vertical plate (109) is fixedly connected to the bottom plate (110) by bolts. An inclined plate (111) is installed on the bottom plate (110). The top of the inclined plate (111) is connected to a clamping block (113) in the vertical plate (109) through a movable ring assembly (112).

7. The underground support structure for resisting high liquid limit red clay according to claim 6, characterized in that: The movable ring assembly (112) is composed of two vertically plugged circular rings, and a plurality of clamping blocks (113) are evenly spaced above and below. The bottom of the inclined plate (111) is connected to the mounting seat, and the mounting seat is connected to the bottom plate (110) by bolts. The bottom plate (110) is provided with a plurality of evenly spaced connecting holes.

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