A buried double-arrow type explosion ground shock load weakening structure and a construction method thereof

Abstract

The present application belongs to the technical field of underground structure protection engineering, and particularly relates to a buried double-arrow explosion ground impact load weakening structure and a construction method thereof, comprising: a ground impact load weakening layer, which is arranged on one side of an underground structure and has a construction depth greater than the depth of the underground structure; a bullet-proof layer, which is arranged directly above the underground structure and the plurality of ground impact load weakening layers; and the ground impact load weakening layer comprises an inner single arrow and an outer single arrow, the outer single arrow is located on the side of the inner single arrow away from the underground structure, and the tips of the inner single arrow and the outer single arrow are away from the underground structure. The ground impact load weakening layer can effectively disperse the propagation of the explosion ground impact, so as to reduce the ground impact load transmitted to the underground structure and improve the safety of the structure. The structure is simple and easy to construct, can realize factory prefabrication, transportation and on-site installation integration, and meets the engineering application in the field of civil engineering.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of underground structure protection engineering, and particularly relates to a buried double-arrow type explosion ground impact load weakening structure. BACKGROUND

[0002] Guided earth-penetrating weapons have significant penetration and damage effects, and their development trend has posed a severe threat to the safety of underground structures. When the earth-penetrating bomb penetrates into the soil to a certain depth, a completely enclosed underground explosion will occur. Compared with surface explosion and shallow explosion, the completely enclosed underground explosion can significantly increase the strength of the coupled ground impact load and has a longer load duration. Underground explosion will cause large soil deformation and interact with the ground impact generated by the explosion, which will cause serious damage or even collapse of the underground structure.

[0003] Common underground structure protection methods, such as increasing material strength, increasing structure size, and changing structure form, can achieve certain protection effects, but increase the construction cost and construction period, and are only suitable for new underground structures. Unlike traditional thick and heavy structural members, the flexible protection of hollow solids is easier to achieve the desired protection effect and can reduce the cost of engineering construction. Underground structures are often used for civil air defense, military facilities or transportation routes, and if they are seriously damaged or collapsed due to explosion ground impact, it will cause irreparable loss.

[0004] In order to improve the safety of existing underground structures during service, a weakening measure that can effectively resist explosion ground impact is constructed to block or disperse the ground impact load, and a buried double-arrow type explosion ground impact load weakening structure and its construction method are proposed. SUMMARY

[0005] The purpose of the present application is to provide a buried double-arrow type explosion ground impact load weakening structure and its construction method to solve the above problems.

[0006] To achieve the above purpose, the present application provides the following scheme:

[0007] A buried double-arrow type explosion ground impact load weakening structure, comprising:

[0008] A ground impact load weakening layer is buried in the ground, the ground impact load weakening layer is arranged on one side of the underground structure, and the construction depth of the ground impact load weakening layer is greater than the depth of the underground structure;

[0009] A bullet shielding layer is laid directly above the underground structure and the plurality of ground impact load weakening layers;

[0010] The ground impact load weakening layer comprises an inner single arrowhead and an outer single arrowhead located on the side of the inner single arrowhead away from the underground structure, and the tips of the inner single arrowhead and the outer single arrowhead are away from the underground structure.

[0011] Preferably, the inner single arrowhead comprises:

[0012] An inner single arrowhead rhombic interlayer concrete slab;

[0013] A plurality of inner single arrowhead parallelogram interlayer concrete slabs are respectively located on two adjacent sides of the inner single arrowhead rhombic interlayer concrete slab, and are arranged in a second inner single arrowhead structural layer in the horizontal direction.

[0014] A plurality of inner single arrowhead rhombic hollow concrete cells are arranged in a first inner single arrowhead structural layer in the horizontal direction, and the first inner single arrowhead structural layer is matched with the second inner single arrowhead structural layer, and the side surfaces of adjacent two inner single arrowhead rhombic hollow concrete cells are arranged in abutment.

[0015] The first inner single arrowhead structural layer and the second inner single arrowhead structural layer are both provided with a plurality of layers from top to bottom, and the first inner single arrowhead structural layer is located between two adjacent second inner single arrowhead structural layers.

[0016] Preferably, the outer single arrowhead comprises:

[0017] An outer single arrowhead square interlayer concrete slab;

[0018] A plurality of outer single arrowhead rectangular interlayer concrete slabs are respectively located on two adjacent sides of the outer single arrowhead square interlayer concrete slab, and are arranged in abutment between adjacent two outer single arrowhead rectangular interlayer concrete slabs, the outer single arrowhead square interlayer concrete slab and the outer single arrowhead rectangular interlayer concrete slabs, and the outer single arrowhead square interlayer concrete slab and a plurality of outer single arrowhead rectangular interlayer concrete slabs are arranged in a first outer single arrowhead structural layer in the horizontal direction.

[0019] A plurality of outer single arrowhead square hollow concrete cells are arranged in a second outer single arrowhead structural layer in the horizontal direction, and the side surfaces of adjacent two outer single arrowhead square hollow concrete cells are arranged in abutment, and the first outer single arrowhead structural layer is matched with the second outer single arrowhead structural layer.

[0020] The first outer single arrow structure layer and the second outer single arrow structure layer are arranged in plurality from top to bottom, and the second outer single arrow structure layer is located between the adjacent two first outer single arrow structure layers.

[0021] Preferably, the included angle between the two adjacent sides of the inner single arrow is 120°.

[0022] Preferably, the included angle between the two adjacent sides of the outer single arrow is 90°.

[0023] Preferably, the strength grade of the inner single arrow rhombus hollow concrete single cell, the inner single arrow parallelogram interlayer concrete slab and the inner single arrow rhombus interlayer concrete slab is C10 or C15.

[0024] Preferably, the strength grade of the outer single arrow square hollow concrete single cell, the outer single arrow square interlayer concrete slab and the outer single arrow rectangular interlayer concrete slab is C10 or C15.

[0025] A construction method of the buried double-arrow explosion ground shock load weakening structure comprises the following steps:

[0026] S1, a buried trench is excavated outside the underground structure, a distance is left between the buried trench and the underground structure, and the excavation depth of the buried trench is greater than the depth of the underground structure;

[0027] S2, the inner single arrow and the outer single arrow are constructed in the buried trench;

[0028] S3, the earthwork is backfilled layer by layer and compacted in the buried trench;

[0029] S4, the ground surface of the excavation site is treated for site leveling, and the construction is completed.

[0030] Compared with the prior art, the present application has the following advantages and technical effects:

[0031] (1) The ground shock load weakening layer of the present application can effectively disperse the propagation of explosion ground shock, thereby reducing the ground shock load transmitted to the underground structure and improving the safety of the structure. The structure is simple and easy to construct, can realize factory prefabrication, transportation and on-site installation integration, and meets the engineering application in the field of civil engineering.

[0032] (2) After the ground shock load weakening layer is damaged in the process of dispersing the load, the ground shock load weakening layer can be replaced by excavating the original earthwork, re-burying the ground shock load weakening layer and completing the earthwork backfilling, thereby reducing the cost and shortening the construction period. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0034] Figure 1 It is a front view of the present application.

[0035] Figure 2 It is a schematic diagram of the whole of the present application.

[0036] Figure 3 It is a top view of the present application.

[0037] Figure 4 It is a schematic diagram of the laying of the first outer single arrow structure layer and the second inner single arrow structure layer in the present application.

[0038] Figure 5 It is a schematic diagram of the whole of the inner single arrow rhombus hollow concrete cell in the present application.

[0039] Figure 6 It is a schematic diagram of the whole of the outer single arrow square hollow concrete cell in the present application.

[0040] Figure 7 It is a top view of the circumferential laying of the ground impact load weakening layer in the present application.

[0041] In the figure, 1 is an underground structure; 2 is a bulletproof layer; 3 is a ground impact load weakening layer; 4 is an explosion ground impact load source; 5 is an inner single arrow; 51 is an inner single arrow rhombus hollow concrete cell; 52 is an inner single arrow parallelogram interlayer concrete slab; 53 is an inner single arrow rhombus interlayer concrete slab; 6 is an outer single arrow; 61 is an outer single arrow square hollow concrete cell; 62 is an outer single arrow square interlayer concrete slab; 63 is an outer single arrow rectangular interlayer concrete slab. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and all other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0044] Reference Figures 1 to 7 The application discloses a buried double-arrow explosion ground shock load weakening structure, which comprises:

[0045] The ground shock load weakening layer 3 is buried underground, and is arranged on one side of the underground structure 1; the construction depth of the ground shock load weakening layer 3 is greater than the depth of the underground structure 1.

[0046] The bullet-proof layer 2 is arranged above the underground structure 1 and the plurality of ground shock load weakening layers 3.

[0047] The ground shock load weakening layer 3 comprises an inner single arrow 5 and an outer single arrow 6, the outer single arrow 6 is located on the side, away from the underground structure 1, of the inner single arrow 5, and the tips of the inner single arrow 5 and the outer single arrow 6 are away from the underground structure 1.

[0048] In a further optimization scheme, the inner single arrow 5 comprises:

[0049] The inner single arrow diamond interlayer concrete slab 53;

[0050] The plurality of inner single arrow parallelogram interlayer concrete slabs 52 are respectively arranged on two sides adjacent to the inner single arrow diamond interlayer concrete slab 53, and are arranged in abutment between two adjacent inner single arrow parallelogram interlayer concrete slabs 52, between the inner single arrow parallelogram interlayer concrete slab 52 and the inner single arrow diamond interlayer concrete slab 53, and in the horizontal direction, the plurality of inner single arrow parallelogram interlayer concrete slabs 52 and the inner single arrow diamond interlayer concrete slab 53 are arranged into a second inner single arrow structural layer.

[0051] The plurality of inner single arrow diamond hollow concrete cells 51 are arranged into a first inner single arrow structural layer in the horizontal direction, the first inner single arrow structural layer is matched with the second inner single arrow structural layer, and the side surfaces of two adjacent inner single arrow diamond hollow concrete cells 51 are arranged in abutment.

[0052] The first inner single arrow structural layer and the second inner single arrow structural layer are both provided with a plurality of layers from top to bottom, and the first inner single arrow structural layer is located between two adjacent second inner single arrow structural layers.

[0053] In a further optimization scheme, the outer single arrow 6 comprises:

[0054] The outer single arrow square interlayer concrete slab 62;

[0055] The outer single-arrow rectangular interlayer concrete slab 63 is located on the two sides adjacent to the outer single-arrow square interlayer concrete slab 62 respectively, and the adjacent two outer single-arrow rectangular interlayer concrete slabs 63, the outer single-arrow square interlayer concrete slab 62 and the outer single-arrow rectangular interlayer concrete slab 63 are arranged in abutment, and the outer single-arrow square interlayer concrete slab 62 and the plurality of outer single-arrow rectangular interlayer concrete slabs 63 are arranged in the first outer single-arrow structure layer in the horizontal direction;

[0056] The plurality of outer single-arrow square hollow concrete cells 61 are arranged in the second outer single-arrow structure layer in the horizontal direction, and the side surfaces of the adjacent two outer single-arrow square hollow concrete cells 61 are arranged in abutment, and the first outer single-arrow structure layer is matched with the second outer single-arrow structure layer;

[0057] The first outer single-arrow structure layer and the second outer single-arrow structure layer are both provided with a plurality of layers from top to bottom, and the second outer single-arrow structure layer is located between the adjacent two first outer single-arrow structure layers.

[0058] In a further optimization scheme, the included angle between the two adjacent sides of the inner single-arrow 5 is 120°.

[0059] In a further optimization scheme, the included angle between the two adjacent sides of the outer single-arrow 6 is 90°.

[0060] In a further optimization scheme, the strength grade of the inner single-arrow rhombus hollow concrete cell 51, the inner single-arrow parallelogram interlayer concrete slab 52 and the inner single-arrow rhombus interlayer concrete slab 53 is C10 or C15.

[0061] In a further optimization scheme, the strength grade of the outer single-arrow square hollow concrete cell 61, the outer single-arrow square interlayer concrete slab 62 and the outer single-arrow rectangular interlayer concrete slab 63 is C10 or C15.

[0062] A construction method of a buried double-arrow type explosion ground shock load weakening structure, comprising the following steps:

[0063] S1, a buried trench is excavated on the outer side of the underground structure 1, a distance is left between the buried trench and the underground structure 1, and the excavation depth of the buried trench is greater than the depth of the underground structure 1;

[0064] S2, the inner single-arrow 5 and the outer single-arrow 6 are constructed in the buried trench;

[0065] S3, the earthwork in the buried trench is backfilled layer by layer and compacted;

[0066] S4, the ground surface of the excavation site is treated for site leveling, and the construction is completed.

[0067] Specific construction method:

[0068] According to the construction position of the underground structure 1, a buried trench is excavated at a distance away from the underground structure 1, the excavation depth of the buried trench is greater than the construction depth of the underground structure 1, to ensure that the ground impact load weakening layer 3 can completely cover the side surface of the underground structure, and the bottom of the buried trench is well flattened to ensure the construction quality of the buried double-arrow explosion ground impact load weakening structure;

[0069] According to the design angle and position of the inner single-arrow 5, the inner single-arrow rhombus interlayer concrete slab 53 and the inner single-arrow parallelogram interlayer concrete slab 52 are laid, and the inner single-arrow rhombus interlayer concrete slab 53 and the inner single-arrow parallelogram interlayer concrete slab 52 are arranged in the horizontal direction to form a second inner single-arrow structural layer, and a plurality of inner single-arrow rhombus hollow concrete cells 51 are laid on the second inner single-arrow structural layer, and the plurality of inner single-arrow rhombus hollow concrete cells 51 are laid along the second inner single-arrow structural layer to form a first inner single-arrow structural layer, and the second inner single-arrow structural layer and the first inner single-arrow structural layer are sequentially laid to form the inner single-arrow 5;

[0070] According to the design angle and position of the outer single-arrow 6, the outer single-arrow square interlayer concrete slab 62 and the outer single-arrow rectangular interlayer concrete slab 63 are laid, and the outer single-arrow square interlayer concrete slab 62 and the outer single-arrow rectangular interlayer concrete slab 63 are arranged in the horizontal direction to form a first outer single-arrow structural layer, and a plurality of outer single-arrow square hollow concrete cells 61 are laid on the first outer single-arrow structural layer, and the plurality of outer single-arrow square hollow concrete cells 61 are laid along the first outer single-arrow structural layer to form a second outer single-arrow structural layer, and the first outer single-arrow structural layer and the second outer single-arrow structural layer are sequentially laid to form the outer single-arrow 6;

[0071] During the laying process, the tightness and neatness between the inner single-arrow parallelogram interlayer concrete slab 52, the inner single-arrow rhombus interlayer concrete slab 53, the inner single-arrow rhombus hollow concrete cell 51, the outer single-arrow square hollow concrete cell 61, the outer single-arrow square interlayer concrete slab 62, and the outer single-arrow rectangular interlayer concrete slab 63 need to be ensured;

[0072] The soil is backfilled layer by layer and compacted layer by layer in the buried trench of the constructed ground impact load weakening layer 3, and the structural stability of the inner single-arrow 5 and the outer single-arrow 6 needs to be ensured during this process;

[0073] After backfilling is completed, the ground surface at the excavation site is flattened, and the construction is completed.

[0074] The ground impact load weakening layer 3 can be circumferentially arranged outside the underground structure 1, and the adjacent two ground impact load weakening layers 3 are in contact.

[0075] Assuming that the explosive shock load source 4 exists far away from the underground structure 1 on the side of the shock load weakening layer 3, when the explosion occurs, the ground shock load is transmitted to the shock load weakening layer 3 through the soil, and the arrow of the outer single arrow 6 disperses the ground shock load to both sides of the arrow, because the outer single arrow 6 is composed of the outer single arrow square hollow concrete cell 61 and the outer single arrow square interlayer concrete plate 62 and the outer single arrow rectangular interlayer concrete plate 63, which can deform greatly when subjected to impact load, thereby reducing the ground shock load; when the ground shock load is too large to cause the outer single arrow square hollow concrete cell 61 to be damaged, the existence of the inner single arrow 5 can still continue to disperse or block the ground shock load.

[0076] Under the excellent dispersion and blocking effect, the ground shock load suffered by the underground structure will be significantly reduced, thereby reducing the damage and destruction of the structure and improving the safety of the underground structure.

[0077] By adjusting the size and thickness of the inner single arrow rhombus hollow concrete cell 51 and the outer single arrow square hollow concrete cell 61 in the shock load weakening layer 3, the strength grade of the concrete, the angle size of the inner and outer single arrows 5 and 6, and the stacking depth of the weakening measures, the dispersion benefit of the shock load weakening layer 3 to the impact load can be maximized. When the size of the inner single arrow rhombus hollow concrete cell 51 and the outer single arrow square hollow concrete cell 61 in the shock load weakening layer 3 increases, its ability to disperse and resist the ground shock load will be improved. When the wall thickness of the inner single arrow rhombus hollow concrete cell 51 and the outer single arrow square hollow concrete cell 61 in the shock load weakening layer 3 decreases, its ability to disperse and resist the ground shock load will be improved. When the concrete strength of the inner single arrow rhombus hollow concrete cell 51 and the outer single arrow square hollow concrete cell 61 in the shock load weakening layer 3 decreases, its effect of dispersing and blocking the propagation of the explosive ground shock is better, and the protection ability will be improved. In addition, the angle size of the inner and outer single arrows 5 and 6 can be adjusted according to the construction scale and size of the underground structure 1 to adapt to the actual construction scale of the underground structure 1.

[0078] For engineering practice, different specifications of the size and thickness of the inner single arrow rhombus hollow concrete cell 51 and the outer single arrow square hollow concrete cell 61, the strength grade of the concrete, the angle size of the inner and outer arrows, and the stacking depth of the weakening measures of the shock load weakening layer 3 can be designed and buried according to the structure scale and construction conditions, so that the dispersion benefit of the weakening layer to the ground shock load can be maximized. In addition, according to the actual engineering conditions, the buried weakening layer can be laid around the underground structure to maximize the reduction of damage to the underground structure and improve the safety of the internal personnel and equipment.

[0079] In the description of the present application, it is to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are intended to indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0080] The above-described embodiments are only to describe the preferred modes of the present application, and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A buried double-arrowhead type explosive ground impact load weakening structure, characterized in that, include: The ground impact load weakening layer (3) is buried underground. The ground impact load weakening layer (3) is located on one side of the underground structure (1). The construction depth of the ground impact load weakening layer (3) is greater than the depth of the underground structure (1). The impact shielding layer (2) is laid directly above the underground structure (1) and the multiple impact load weakening layers (3); The ground impact load weakening layer (3) includes an inner single arrow (5) and an outer single arrow (6). The outer single arrow (6) is located on the side of the inner single arrow (5) away from the underground structure (1). The tips of the inner single arrow (5) and the outer single arrow (6) are away from the underground structure (1). The inner single arrow (5) includes: Inner single-arrow rhomboid interlayer concrete slab (53); Multiple inner single-arrow parallelogram interlayer concrete slabs (52) are respectively located on both sides of the inner single-arrow rhombus interlayer concrete slab (53). The inner single-arrow parallelogram interlayer concrete slabs (52) are attached to each other and to each other. The multiple inner single-arrow parallelogram interlayer concrete slabs (52) and the inner single-arrow rhombus interlayer concrete slab (53) are arranged in the horizontal direction to form a second inner single-arrow structural layer. Multiple inner single-arrow rhomboid hollow concrete unit cells (51) are arranged in the horizontal direction to form a first inner single-arrow structure layer. The first inner single-arrow structure layer is adapted to the second inner single-arrow structure layer, and the sides of two adjacent inner single-arrow rhomboid hollow concrete unit cells (51) are attached together. The first inner single-arrow structure layer and the second inner single-arrow structure layer are provided in multiple ways from top to bottom, and the first inner single-arrow structure layer is located between two adjacent second inner single-arrow structure layers; The outer single arrow (6) includes: Outer single-arrow square interlayer concrete slab (62); The outer single-arrow rectangular interlayer concrete slabs (63) are located on the adjacent sides of the outer single-arrow square interlayer concrete slabs (62). The two adjacent outer single-arrow rectangular interlayer concrete slabs (63), the outer single-arrow square interlayer concrete slabs (62) and the outer single-arrow rectangular interlayer concrete slabs (63) are attached together. The outer single-arrow square interlayer concrete slabs (62) and the multiple outer single-arrow rectangular interlayer concrete slabs (63) are arranged in the horizontal direction to form a first outer single-arrow structural layer. Multiple outer single-arrow square hollow concrete unit cells (61) are arranged in the horizontal direction to form a second outer single-arrow structure layer. The sides of two adjacent outer single-arrow square hollow concrete unit cells (61) are attached together. The first outer single-arrow structure layer is adapted to the second outer single-arrow structure layer. The first outer single-arrow structure layer and the second outer single-arrow structure layer are provided in multiple layers from top to bottom, and the second outer single-arrow structure layer is located between two adjacent first outer single-arrow structure layers.

2. The buried double-arrow type explosive ground impact load weakening structure according to claim 1, characterized in that, The included angle between the two adjacent sides of the inner single arrow (5) is 120°.

3. The buried double-arrow type explosive ground impact load weakening structure according to claim 1, characterized in that, The included angle between the two adjacent sides of the outer single arrow (6) is 90°.

4. The buried double-arrow type explosive ground impact load weakening structure according to claim 1, characterized in that, The strength grades of the inner single-arrow rhomboid hollow concrete unit cell (51), the inner single-arrow parallelogram interlayer concrete slab (52), and the inner single-arrow rhomboid interlayer concrete slab (53) are C10 or C15.

5. The buried double-arrow type explosive ground impact load weakening structure according to claim 1, characterized in that, The strength grades of the outer single-arrow square hollow concrete unit cell (61), the outer single-arrow square interlayer concrete slab (62), and the outer single-arrow rectangular interlayer concrete slab (63) are C10 or C15.

6. A method for constructing a buried double-arrowhead type explosive ground impact load weakening structure according to any one of claims 1-5, characterized in that, Includes the following steps: S1. A trench is dug on the outside of the underground structure (1), with a distance between the trench and the underground structure (1), and the depth of the trench is greater than the depth of the underground structure (1). S2. Construct an inner single arrow (5) and an outer single arrow (6) within the buried trench. S3. Backfill the trench with soil layer by layer and compact it. S4. Level the ground at the excavation site to complete the construction.

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