A geotechnical engineering foundation pit support structure

Abstract

The present invention relates to a geotechnical engineering foundation pit support structure, belonging to the technical field of foundation pit support. The geotechnical engineering foundation pit support structure comprises a support plate, a support plate and at least one reinforcement member, wherein the support plate is arranged on one side of the support plate, the support plate is provided with a clamping groove, and the reinforcement member comprises a reinforcing plate and a retractable clamping member, and the clamping member is detachably inserted into the clamping groove of one of the support plates so that the reinforcing plate is fixed to the support plate and the reinforcing plate abuts against the support plate. In the geotechnical engineering foundation pit support structure provided by the present invention, the support plate is used to support the foundation pit body, and the support plate is used to strengthen the strength of the support plate. A reinforcement member is added to the support plate portion corresponding to the side wall of the foundation pit body where there is a loose foundation pit body, and the clamping member of the reinforcement member is clamped in the clamping groove. The reinforcing plate will exert a certain force on the support plate, so that the support plate supports the soft soil layer of the side wall of the foundation pit body, and the strength of the support plate can be increased.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit support, and in particular relates to a geotechnical engineering foundation pit support structure. Background Art

[0002] In the construction of geotechnical engineering foundation pits, support measures are required to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. The foundation pit is a temporary project, and the excavation process of the foundation pit will inevitably cause deformation of the surrounding soil. During the excavation of the foundation pit, a foundation pit support structure will be set up to improve safety.

[0003] However, during the support process of the foundation pit, the soil layer on the side walls of the foundation pit may become loose, resulting in instability of the foundation pit and posing certain safety hazards. Summary of the invention

[0004] In view of this, the purpose of an embodiment of the present invention is to provide a geotechnical engineering foundation pit support structure, wherein the support plate is used to support the foundation pit body, and the support plate is used to strengthen the strength of the support plate. A reinforcement piece is added to the support plate portion corresponding to the soft side wall of the foundation pit body, and the clamping piece of the reinforcement piece is clamped in the clamping groove. The reinforcement plate and the support plate are tightly pressed and fit together. The reinforcement plate will exert a certain force on the support plate, so that the support plate can support the soft soil layer on the side wall of the foundation pit body and increase the strength of the support plate.

[0005] The embodiment of the present invention is achieved as follows:

[0006] An embodiment of the present invention provides a geotechnical engineering foundation pit support structure for supporting a foundation pit body, wherein the geotechnical engineering foundation pit support structure comprises a support plate, a support plate and at least one reinforcement member, wherein the support plate is arranged on one side of the support plate, and the support plate is provided with a snap-in groove, and the reinforcement member comprises a reinforcement plate and a retractable snap-in member, and the snap-in member is detachably inserted into the snap-in groove of one of the support plates so that the reinforcement plate is fixed to the support plate and the reinforcement plate abuts against the support plate.

[0007] As an optional solution of the above embodiment, each of the reinforcement members has two clips, and the two clips are respectively located on both sides of the reinforcement plate. The number of the support plates is multiple and they are evenly spaced. The clip grooves are respectively provided on both sides of the support plates, and the two clips of the reinforcement member are respectively matched with the clip grooves of the two adjacent support plates.

[0008] As an optional solution of the above embodiment, the two clamping members are symmetrical with respect to the vertical center axis of the reinforcing plate, and the two clamping grooves are symmetrical with respect to the vertical center axis of the supporting plate.

[0009] As an optional scheme for the above embodiment, the clamping member includes a sleeve, a limit block, a spring and a clamping block, the sleeve is fixed to the reinforcement plate, the limit block is slidably arranged in the sleeve, the spring is located in the sleeve, the two ends of the spring are respectively abutted against the sleeve and the limit block, so that the limit block has a tendency to move in a direction away from the reinforcement plate, one end of the clamping block is fixed to the limit block and the clamping block extends from the sleeve, and the clamping block is selectively clamped in one of the clamping grooves.

[0010] As an optional solution of the above embodiment, a shifting block for driving the clamping block to move is provided on the clamping block, and the shifting block is located outside the sleeve.

[0011] As an optional solution of the above embodiment, a square hole is provided at one end of the sleeve, the lateral cross-section of the clamping block is a rectangle matching the square hole, and the clamping block can be slidably inserted into the square hole.

[0012] As an optional solution of the above embodiment, the cross-section of the supporting plate is L-shaped, and the supporting plate adopts a triangular rib plate.

[0013] As an optional solution of the above embodiment, the geotechnical engineering foundation pit support structure also includes a retaining plate, which is obliquely arranged on the top of the support plate. In the direction from bottom to top, the retaining plate gradually moves away from the side wall of the foundation pit body.

[0014] As an optional solution of the above embodiment, the retaining plate includes a retaining layer and a shock-absorbing buffer layer, the shock-absorbing buffer layer is arranged on one side of the retaining layer, and the shock-absorbing buffer layer is closer to the foundation pit body than the retaining layer.

[0015] As an optional solution of the above embodiment, the retaining plate further includes a wear-resistant and corrosion-resistant layer, which is arranged on one side of the shock-absorbing and buffering layer and is closer to the foundation pit body than the shock-absorbing and buffering layer.

[0016] The beneficial effects of the present invention are:

[0017] The geotechnical engineering foundation pit support structure provided by the present invention comprises a support plate for supporting the foundation pit body, a support plate for reinforcing the strength of the support plate, and a reinforcement piece is added to the support plate portion corresponding to the soft side wall of the foundation pit body. The clamping piece of the reinforcement piece is clamped in the clamping groove, and the reinforcement plate is tightly pressed and fitted with the support plate. The reinforcement plate will exert a certain force on the support plate, so that the support plate can support the soft soil layer on the side wall of the foundation pit body and increase the strength of the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. As shown in the accompanying drawings, the above and other purposes, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0019] Figure 1 A schematic structural diagram of a geotechnical engineering foundation pit support structure provided by an embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram showing the matching relationship between the reinforcement member and the support plate is shown;

[0021] Figure 3 Shows Figure 2 A partial enlarged schematic diagram of

[0022] Figure 4 Shows Figure 1 Side view of.

[0023] icon:

[0024] 10-Geotechnical engineering foundation pit support structure;

[0025] 11- support plate; 12- support plate; 13- reinforcement member; 14- retaining plate; 15- foundation pit body;

[0026] 120 - snap-fit ​​groove; 130 - reinforcement plate; 131 - snap-fit ​​piece; 132 - sleeve; 133 - limit block; 134 - spring; 135 - snap-fit ​​block; 136 - shift block; 140 - retaining layer; 141 - shock-absorbing buffer layer; 142 - wear-resistant and corrosion-resistant layer. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] Please refer to Figure 1 As shown, an embodiment of the present invention provides a geotechnical engineering foundation pit support structure 10, which is used to support a foundation pit body 15.

[0031] The foundation pit body 15 is an earth foundation pit dug during rock engineering construction. Taking the example that the bottom of the foundation pit body 15 and the side wall are at an angle of ninety degrees, the side wall of the foundation pit body 15 is the side wall of the soil layer formed after the foundation pit is dug.

[0032] The geotechnical engineering foundation pit support structure 10 includes a support plate 11 , a support plate 12 and a reinforcement member 13 .

[0033] The support plate 11 can be made of Q235 steel plate, and the cross section is an L-shaped structure, which just fits the bottom and side wall of the foundation pit body 15. Of course, if the angle of the foundation pit body 15 changes, the cross-sectional structure of the support plate 11 can change accordingly.

[0034] Steel bars are pre-embedded in the bottom and side walls of the foundation pit body 15 , and the support plate 11 is fixed to the pre-embedded steel bars of the foundation pit body 15 by welding.

[0035] The support plate 12 is disposed on one side of the supporting plate 11. In the present embodiment, the support plate 12 may be made of a No. 45 steel plate, and the support plate 12 may have a triangular rib structure.

[0036] There are multiple support plates 12, which are welded at the L-shaped corners of the support plate 11. The multiple support plates 12 are evenly distributed at equal intervals to achieve overall reinforcement and support for the foundation pit body 15, thereby improving the support stability of the support plate 11. Of course, a certain error is allowed in the spacing between two support plates 12.

[0037] Please refer to Figure 2 , Figure 3As shown, each support plate 12 is pre-opened with a snap-in groove 120 on both sides for later temporary installation and reinforcement of the soft soil layer on the side wall of the foundation pit body 15. The two snap-in grooves 120 are symmetrical with the vertical central axis of the support plate 12 as the center, and the shape of the snap-in groove 120 can be set as needed.

[0038] The specific structure of the reinforcement member 13 is as follows: the reinforcement member 13 includes a reinforcement plate 130 and a retractable clamping member 131 .

[0039] The reinforcement plate 130 is also made of No. 45 steel plate, which has high strength and is not easy to deform. In addition, mesh ribs are arranged on the plate surface of the reinforcement plate 130 facing the support plate 11, which improves the strength of the reinforcement plate 130 as a whole.

[0040] The clamping member 131 is clamped in the clamping groove 120 of one of the support plates 12 , so that the reinforcing plate 130 is fixed to the support plate 12 and the reinforcing plate 130 is in contact with the supporting plate 11 .

[0041] Each reinforcement member 13 has two clamping members 131 , and the two clamping members 131 are respectively located on two sides of the reinforcement plate 130 . The two sides mentioned here may refer to the two ends of the reinforcement plate in the width direction (lateral direction).

[0042] The two clamping members 131 of the reinforcement member 13 are matched with the clamping grooves 120 of two adjacent support plates 12 respectively.

[0043] The two clamping members 131 are symmetrical with respect to the vertical center axis of the reinforcing plate 130 .

[0044] Of course, in other embodiments, it is also possible that the reinforcement 13 only includes one clip 131. Of course, it is best to ensure that the other end of the reinforcement 13 is fixed. For example, a stopper is provided on the support plate 11, and a slot is provided on the stopper. One end of the reinforcement plate 130 is embedded in the slot, and the other end cooperates with the clip slot 120 through the clip 131.

[0045] The specific structure of the clamping member 131 can be selected from but not limited to the following solutions, please refer to Figure 3 As shown, the clamping member 131 includes a sleeve 132 , a limiting block 133 , a spring 134 and a clamping block 135 .

[0046] The sleeve 132 is fixed to the reinforcing plate 130 , and the fixing method may be welding.

[0047] The interior of the sleeve 132 is hollow to form a hollow slide groove, and a square hole is provided at the end of the sleeve 132 .

[0048] The limiting block 133 is slidably disposed in the sleeve 132 , and the limiting block 133 can move closer to or farther from the reinforcing plate 130 during the sliding process.

[0049] The spring 134 is located in the sleeve 132 . The spring 134 is a tensile steel spring 134 with high elasticity. Both ends of the spring 134 are respectively in contact with the sleeve 132 and the limit block 133 , so that the limit block 133 has a tendency to move in a direction away from the reinforcing plate 130 .

[0050] One end of the clamping block 135 is fixed to the limit block 133 and the clamping block 135 extends from the square hole of the sleeve 132. The lateral cross-section of the clamping block 135 is a rectangle matching the square hole. The clamping block 135 can be slidably inserted into the square hole, that is, the square hole and the clamping block 135 are slidably sleeved. The square hole and the clamping block 135 cooperate to prevent the clamping block 135 from rotating while sliding left and right.

[0051] The connection method of the clamping block 135 and the limiting block 133 can be welding or integral molding, etc. The limiting block 133 can prevent the clamping block 135 from slipping out of the sleeve 132.

[0052] The snap-in block 135 is removable and selectively inserted into one of the snap-in slots 120. In simple terms, the reinforcement piece 13 will only be used when the corresponding position of the support plate 11 needs to be reinforced. The reinforcement plate 130 is placed between two adjacent support plates 12, and the snap-in block 135 is inserted into the corresponding snap-in slot 120. When reinforcement is not required, there is no need to add a reinforcement piece 13 between the two adjacent support plates 12, and the snap-in block 135 naturally does not need to be inserted into the corresponding snap-in slot 120.

[0053] In addition, a shifting block 136 for driving the clamping block 135 to move is provided on the clamping block 135, and the shifting block 136 is located outside the sleeve 132. The shifting block 136 can be used by the staff to push and pull the clamping block 135.

[0054] In addition, the geotechnical engineering foundation pit support structure 10 further includes a retaining plate 14 , which is obliquely disposed on the top of the support plate 11 , and gradually moves away from the side wall of the foundation pit body 15 in a direction from bottom to top.

[0055] Please refer to Figure 4 As shown, the retaining plate 14 includes a retaining layer 140 , a shock absorbing and buffering layer 141 and a wear-resistant and corrosion-resistant layer 142 .

[0056] The retaining layer 140 is welded to the top of the supporting plate 11, and the retaining plate 14 can be made of ordinary steel plate.

[0057] The shock absorbing and buffering layer 141 is bonded to one side of the retaining layer 140 by strong resin glue. The shock absorbing and buffering layer 141 is closer to the foundation pit body 15 than the retaining layer 140 .

[0058] The shock-absorbing buffer layer 141 is made of foamed PU rubber sheet, and many pores are formed inside it through the foaming process. When the sand and gravel on the side wall of the foundation pit slide down, it will form a sand and gravel impact on the retaining plate 14. The impact force will be transmitted and cause the shock-absorbing buffer layer 141 to be compressed. Many pores inside it will be deformed under pressure. The gas in the pores is compressed to generate deformation rebound potential energy and buffer the impact force, thereby effectively improving the shock-absorbing and buffering performance of the retaining plate 14.

[0059] The wear-resistant and corrosion-resistant layer 142 is bonded to one side of the shock-absorbing and buffering layer 141 by strong resin glue, and the wear-resistant and corrosion-resistant layer 142 is closer to the foundation pit body 15 than the shock-absorbing and buffering layer 141 .

[0060] The wear-resistant and corrosion-resistant layer 142 is made entirely of PTFE polytetrafluoroethylene plate, which has good wear resistance and corrosion resistance. It can reduce the collision and friction of wet sand and gravel sliding down the side wall of the foundation pit body 15 and the influence of moisture on the retaining plate 14, thereby improving the wear resistance and corrosion resistance of the retaining plate 14.

[0061] The method of using the geotechnical engineering foundation pit support structure 10 in this embodiment is as follows:

[0062] The support plate 11 fixed with the support plate 12 is placed at the corresponding position of the foundation pit body 15, and the support plate 11 is fitted with the foundation pit body 15;

[0063] If the soil layer on the side wall of the foundation pit body 15 between two support plates 12 is loose, a reinforcement member 13 is taken;

[0064] The blocks 136 of the two clamping members 131 are pushed inward, so that the clamping block 135 and the limiting block 133 move along the sleeve 132 toward the reinforcing plate 130 , the spring 134 is compressed, and the clamping member 131 is contracted as a whole;

[0065] Keep the state of the clamping piece 131 unchanged, move the reinforcement plate 130 to between the two support plates 12 corresponding to the soft soil layer, so that the reinforcement plate 130 and the support plate 11 are tightly pressed and fitted;

[0066] Align the two clamping blocks 135 with the clamping grooves 120 on the two support plates 12 , release the shifting block 136 , the spring 134 rebounds and pushes the limiting block 133 and the clamping block 135 to move in a direction away from the reinforcing plate 130 , and the clamping block 135 is clamped in the clamping groove 120 .

[0067] The reinforcement plate 130 is fixed under the action of the clamping piece 131 and the clamping groove 120, and one side of the reinforcement plate 130 is tightly pressed and fitted with the support plate 11. The force of this tight pressing and fitting will be transmitted to the soft soil layer on the side wall of the foundation pit body 15 at this position, playing a role in supporting the soft soil layer on the side wall of the foundation pit body 15 at this position, effectively improving the flexible use of the reinforcement plate 130, and the reinforcement plate 130 can enhance the structural strength of the support plate 11 at the corresponding position.

[0068] After the reinforcement plate 130 is quickly installed through the sleeve 132 and the sliding clamping block 135 structure, the mesh rib structure of the reinforcement plate 130 is tightly fitted with the surface of the support plate 11, which is equivalent to the force of the support plate 11 to support the soft soil layer, and the supporting force of a layer of reinforcement plate 130 is reinforced on the inside, which will improve the jacking support for the soft soil layer on the side wall of the foundation pit.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A geotechnical engineering foundation pit support structure, used for supporting a foundation pit body (15), characterized in that: The geotechnical engineering foundation pit support structure (10) comprises a support plate (11), a supporting plate (12) and at least one reinforcing member (13), wherein the supporting plate (12) is arranged on one side of the support plate (11), the supporting plate (12) is provided with a clamping groove (120), and the reinforcing member (13) comprises a reinforcing plate (130) and a retractable clamping member (131), wherein the clamping member (131) is detachably plugged into the clamping groove (120) of one of the supporting plates (12), so that the reinforcing plate (130) is fixed to the supporting plate (12) and the reinforcing plate (130) is in contact with the support plate (11); Each of the reinforcing members (13) has two clamping members (131), the two clamping members (131) are respectively located on two sides of the reinforcing plate (130), the number of the supporting plates (12) is multiple and they are evenly spaced, the two sides of the supporting plates (12) are respectively provided with the clamping grooves (120), and the two clamping members (131) of the reinforcing member (13) are respectively matched with the clamping grooves (120) of two adjacent supporting plates (12); The clamping member (131) comprises a sleeve (132), a limit block (133), a spring (134) and a clamping block (135); the sleeve (132) is fixed to the reinforcing plate (130); the limit block (133) is slidably arranged in the sleeve (132); the spring (134) is located in the sleeve (132); two ends of the spring (134) are respectively in contact with the sleeve (132) and the limit block (133), so that the limit block (133) has a tendency to move in a direction away from the reinforcing plate (130); one end of the clamping block (135) is fixed to the limit block (133) and the clamping block (135) extends out from the sleeve (132); and the clamping block (135) is clamped in the clamping groove (120).

2. The geotechnical engineering foundation pit support structure according to claim 1, characterized in that: The two clamping members (131) are symmetrical with respect to the vertical center axis of the reinforcing plate (130), and the two clamping grooves (120) are symmetrical with respect to the vertical center axis of the supporting plate (12).

3. The geotechnical engineering foundation pit support structure according to claim 1, characterized in that: The clamping block (135) is provided with a shifting block (136) for driving the clamping block (135) to move, and the shifting block (136) is located outside the sleeve (132).

4. The geotechnical engineering foundation pit support structure according to claim 1, characterized in that: A square hole is provided at one end of the sleeve (132); a lateral cross-section of the clamping block (135) is a rectangle matching the square hole; and the clamping block (135) can be slidably inserted into the square hole.

5. The geotechnical engineering foundation pit support structure according to claim 1, characterized in that: The cross section of the support plate (11) is L-shaped, and the support plate (12) is a triangular rib plate.

6. The geotechnical engineering foundation pit support structure according to claim 1, characterized in that: The geotechnical engineering foundation pit support structure (10) further comprises a retaining plate (14), wherein the retaining plate (14) is arranged obliquely on the top of the support plate (11), and in a direction from bottom to top, the retaining plate (14) gradually moves away from the side wall of the foundation pit body (15).

7. The geotechnical engineering foundation pit support structure according to claim 6, characterized in that: The retaining plate (14) comprises a retaining layer (140) and a shock-absorbing buffer layer (141); the shock-absorbing buffer layer (141) is arranged on one side of the retaining layer (140); and the shock-absorbing buffer layer (141) is closer to the foundation pit body (15) than the retaining layer (140).

8. The geotechnical engineering foundation pit support structure according to claim 7, characterized in that: The retaining plate (14) further comprises a wear-resistant and corrosion-resistant layer (142), wherein the wear-resistant and corrosion-resistant layer (142) is arranged on one side of the shock-absorbing and buffering layer (141), and the wear-resistant and corrosion-resistant layer (142) is closer to the foundation pit body (15) than the shock-absorbing and buffering layer (141).

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