Temporary underpinning structure of latticed column

Abstract

The utility model provides a temporary underpinning structure of a latticed column, which belongs to the technical field of underground engineering construction of urban rail transit and comprises two first connecting steel plates, two second connecting steel plates, two third connecting steel plates, two fourth connecting steel plates, two support pressing rods and two support pull rods. The two supporting pressing rods and the two supporting pull rods are connected to form a triangle. The vertical load of dismantling the latticed columns is transmitted to the latticed columns on the left side and the right side adjacent to the latticed columns, it can be guaranteed that after the latticed columns are dismantled, structural stress is reasonable, and normal operation and safe passing of an existing road surface are guaranteed. The utility model has the advantages of simple integral structure, fewer parts for assembly and high integral structure rigidity, ensures the normal operation and safe passage of the existing road surface, and is fast in construction, low in cost and suitable for engineering application and popularization.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the underground engineering construction technical field of urban rail transit, more specifically, relate to a temporary underpinning structure of lattice column. BACKGROUND

[0002] In the process of subway station foundation pit excavation construction, the existing pavement structure is usually passed through. In order to ensure the normal traffic and safe operation of the existing pavement, lattice columns can be used as temporary vertical force transmission components to support the existing pavement.

[0003] However, when the space required by the lattice column station hall layer shield construction is not enough or conflicts with the permanent concrete structure, in order to not affect the construction period and the smooth progress of subsequent construction procedures, one or more lattice columns need to be cut off in advance. If the lattice column is directly cut off, the vertical force borne by the cut-off lattice column cannot be normally transmitted to the next layer, which becomes a weak point of the entire support system and may cause pavement and subgrade cracking and subsidence, damage to the main structure of the station, and even serious phenomena such as pavement collapse.

[0004] Therefore, in order to ensure the key construction period and construction safety, a temporary underpinning structure of the lattice column of the subway station is needed to ensure that the entire support system is reasonably stressed after the lattice column is cut off and can support the existing pavement. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a temporary underpinning structure of lattice column, which is suitable for the scene that the ground at the newly built subway foundation pit excavation place has an existing pavement and subgrade structure, lattice columns are used as temporary vertical force transmission components, and the lattice columns need to be cut off in advance due to some reasons (such as insufficient space required by the lattice column station hall layer shield construction or conflict with the permanent concrete structure). The temporary underpinning structure of the utility model is suitable for different subway foundation pits, the installation and disassembly procedures are relatively simple, and the construction safety and construction period can be ensured.

[0006] To achieve the above-mentioned purpose, the utility model provides a temporary underpinning structure of lattice column, which comprises:

[0007] Two first connecting steel plates are symmetrically connected to the top end of the upper layer lattice column of the lattice column to be removed;

[0008] Two second connecting steel plates are symmetrically connected to the bottom end of the left side lattice column of the upper layer lattice column of the lattice column to be removed;

[0009] Two third connecting steel plates are symmetrically connected to the bottom end of the right side lattice column of the upper layer lattice column of the lattice column to be removed;

[0010] Two fourth connecting steel plates are symmetrically connected to the bottom end of the upper layer lattice column of the lattice column to be removed;

[0011] two support compression bars are symmetrically connected on both sides of the upper lattice column of the lattice column to be demolished; the top end of each support compression bar is connected with two first connecting steel plates, and the bottom end of each support compression bar is connected with two second connecting steel plates or two third connecting steel plates; and

[0012] two support compression bars are symmetrically connected on both sides of the upper lattice column of the lattice column to be demolished; the top end of each support compression bar is connected with two first connecting steel plates, and the bottom end of each support compression bar is connected with two second connecting steel plates or two third connecting steel plates; and

[0013] Further, two concrete pouring column piers are further included, and each concrete pouring column pier is poured outside the lattice column at the node where the support compression bar and the support tension bar are connected.

[0014] Further, the first connecting steel plate and the fourth connecting steel plate are welded with the upper lattice column of the lattice column to be demolished, the second connecting steel plate and the third connecting steel plate are respectively welded with the left lattice column of the upper layer of the lattice column to be demolished and the right lattice column of the upper layer of the lattice column to be demolished, the support compression bar is welded with the first connecting steel plate and the second connecting steel plate, and the support tension bar is welded with the second connecting steel plate, the third connecting steel plate and the fourth connecting steel plate.

[0015] Further, each support compression bar includes two symmetrically arranged first channel steels, and the notches of the two first channel steels are arranged back to back.

[0016] Further, each support tension bar includes two symmetrically arranged second channel steels, and the notches of the two second channel steels are arranged face to face.

[0017] Further, a plurality of first reinforcing steel plates are further connected between the two first channel steels, and two ends of each first reinforcing steel plate are respectively connected with the two first channel steels.

[0018] Further, a plurality of second reinforcing steel plates are further connected between the two second channel steels, and two ends of each second reinforcing steel plate are respectively connected with the two second channel steels.

[0019] Further, the first connecting steel plate, the second connecting steel plate, the third connecting steel plate and the fourth connecting steel plate are all rectangular steel plates, the size of the rectangular steel plate needs to meet the required weld length of the support compression bar and the support tension bar, and the thickness of the rectangular steel plate cannot be less than the web thickness of the first channel steel and the second channel steel.

[0020] Further, the support compression rods and the support tension rods are connected with the rectangular steel plate by three-side welding, and the minimum welding angle size is not less than 8mm.

[0021] Further, the rectangular steel plate is connected with the lattice column by a fillet weld, and the weld leg size is not less than the weld leg size of the support compression rods and the support tension rods connected with the rectangular steel plate, and the contact positions of the rectangular steel plate and the lattice column are all fully welded.

[0022] Compared with the prior art, the utility model has the following technical effects:

[0023] The temporary underpinning structure of the lattice column in the utility model is connected with two support compression rods and two support tension rods into an integrated whole through the first connecting steel plate, the second connecting steel plate, the third connecting steel plate and the fourth connecting steel plate on the two sides of the upper layer of the lattice column to be removed, and forms a triangular force transmission structure on the upper layer of the lattice column to be removed, so that the vertical load of the lattice column to be removed is transmitted to the adjacent lattice columns on the left and right sides, the structure stress is reasonable after the lattice column is removed, the structure is stable and safe, the deformation during the construction of the underpinning structure and the use stage after the completion of the underpinning structure is small, and the normal operation and safe passing of the existing road are ensured. Meanwhile, the normal construction of the main structure is not affected, enough translation space is provided for the shield machine operation, the construction is facilitated, and the construction period is ensured. The overall structure of the temporary underpinning structure of the lattice column in the utility model embodiment is simple, the parts used for assembly are less, the overall structure rigidity is large, the normal operation and safe passing of the existing road are ensured, the construction is fast and low in cost, and the utility model is suitable for engineering application and popularization.

[0024] The temporary underpinning structure of the lattice column in the utility model is connected into an integrated whole through the mutual welding between the steel members, the overall structure rigidity is large, can play a stable supporting transmission role during the construction of the underpinning structure, the overall structure of the temporary underpinning structure is simple, can be connected into an integrated whole through simple welding, the technical difficulty is low, the installation and dismounting processes are relatively simple, so that the construction period can be saved and the operation difficulty of the construction is reduced, and the steel members can be recycled and reused in the later period, thereby reducing the construction cost.

[0025] The temporary underpinning structure of the lattice column in the utility model can be suitable for various situations in which the lattice column needs to be removed, and the structure safety can be ensured through structure calculation and design. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without any creative labor.

[0027] Figure 1 The overall structural schematic diagram of the temporary underpinning structure of the lattice column is provided for the embodiments of the utility model;

[0028] Figure 2 For Figure 1 The front view structural schematic diagram at the node A1, the structure of the node A2 is same with the node A1;

[0029] Figure 3 For Figure 2 The side view structural schematic diagram of the node A1;

[0030] Figure 4 For Figure 2 The top view structural schematic diagram of the node A1;

[0031] Figure 5 For Figure 1 The front view structural schematic diagram at the node B;

[0032] Figure 6 For Figure 5 The side view structural schematic diagram of the node B;

[0033] Figure 7 For Figure 1 The front view structural schematic diagram at the node C;

[0034] Figure 8 For Figure 7 The side view structural schematic diagram of the node C.

[0035] In the drawing, various reference signs are:

[0036] 1, first connecting steel plate, 2, demolish lattice column, 3, last layer lattice column, 4, second connecting steel plate, 5, left lattice column, 6, third connecting steel plate, 7, right lattice column, 8, fourth connecting steel plate, 9, support compression rod, 10, support tension rod, 11, concrete pouring column pier, 12, reinforced concrete main body structure plate, 901, first channel steel, 1011, second channel steel. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clearly and clearly, the utility model is further described in detail in the following with the drawings and examples.It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0038] In the utility model, the term "and / or" describes the association relationship of the associated objects, and indicates that three kinds of relationships can exist, for example, A and / or B can indicate that A exists alone, A and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after it are in an "or" relationship.

[0039] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, 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 utility model.

[0041] The terms used in the embodiments of the utility model are only for the purpose of describing specific embodiments, and are not intended to limit the utility model. The singular forms "a", "said" and "the" used in the embodiments of the utility model and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0042] The terms "first", "second" are only for the purpose of description, used to distinguish objects such as substances from each other, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. For example, without departing from the scope of the embodiments of the utility model, the first XX can also be referred to as the second XX, and similarly, the second XX can also be referred to as the first XX. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0043] Please refer to Figures 1-8 Now a temporary underpinning structure of lattice column provided by the embodiments of the utility model will be described.

[0044] In an embodiment of the utility model, the utility model discloses a kind of temporary underpinning structures of lattice column between reinforced concrete main structure slab 12, comprising: two first connecting steel plates 1, two second connecting steel plates 4, two third connecting steel plates 6, two fourth connecting steel plates 8, two support compression rods 9 and two support tension rods 10.Two first connecting steel plates 1 are symmetrically connected in the top of the upper layer lattice column 3 of the lattice column 2 of removal;Two second connecting steel plates 4 are symmetrically connected in the bottom of the upper layer left lattice column 5 of the lattice column 2 of removal;Two third connecting steel plates 6 are symmetrically connected in the bottom of the upper layer right lattice column 7 of the lattice column 2 of removal;Two fourth connecting steel plates 8 are symmetrically connected in the bottom of the upper layer lattice column 3 of the lattice column 2 of removal;Two support compression rods 9 are symmetrically connected in the two sides of the upper layer lattice column 3 of the lattice column 2 of removal;The top of each support compression rod 9 is connected with two first connecting steel plates 1, and the bottom of each support compression rod 9 is connected with two second connecting steel plates 4 or two third connecting steel plates 6;Two support tension rods 10 are symmetrically connected in the two sides of the upper layer lattice column 3 of the lattice column 2 of removal;One end of each support tension rod 10 is connected with fourth connecting steel plate 8, and the other end is connected with two second connecting steel plates 4 or two third connecting steel plates 6;Two support compression rods 9 and two support tension rods 10 are connected to form triangle.

[0045] As Figure 1 Shown in the embodiment, two first connecting steel plates 1 are respectively connected in the outside of the top of the upper layer lattice column 3, two second connecting steel plates 4 are respectively connected in the outside of the bottom of the upper layer left lattice column 5, two third connecting steel plates 6 are respectively connected in the outside of the bottom of the upper layer right lattice column 7, and two fourth connecting steel plates 8 are respectively connected in the outside of the bottom of the upper layer lattice column 3.The top of the support compression rod 9 of the left side of the upper layer lattice column 3 is connected with the outside of two first connecting steel plates 1, and the bottom is connected with the outside of two second connecting steel plates 4;The top of the support compression rod 9 of the right side of the upper layer lattice column 3 is connected with the outside of two first connecting steel plates 1, and the bottom is connected with the outside of two third connecting steel plates 6;The left end of the support tension rod 10 of the left side of the upper layer lattice column 3 is connected with the inside of two second connecting steel plates 4, and the right end is connected with the inside of two fourth connecting steel plates 8;The left end of the support tension rod 10 of the right side of the upper layer lattice column 3 is connected with the inside of two fourth connecting steel plates 8, and the right end is connected with the inside of two third connecting steel plates 6.Here, inside refers to the side of steel plate close to lattice column, and outside refers to the side of steel plate away from lattice column.

[0046] The temporary underpinning structure of the lattice column in the embodiment of the utility model is connected into an integral whole by the first connecting steel plate 1, the second connecting steel plate 4, the third connecting steel plate 6 and the fourth connecting steel plate 8 on both sides of the upper layer lattice column 3 of the lattice column 2 to be removed, two support compression rods 9 and two support tension rods 10 are connected into an integral whole with the lattice column, a triangular force transmission structure is formed by removing the upper layer of the lattice column 2, the vertical load of the lattice column 2 to be removed is transmitted to the lattice columns on the left and right sides adjacent to the lattice column 2 to be removed, the structure is reasonable in force after the lattice column 2 to be removed is removed, the structure is stable and safe, the deformation during the construction of the underpinning structure and the use stage after the completion of the underpinning structure is small, the normal operation and safe passing of the existing road surface are ensured. Meanwhile, the normal construction of the main structure is not affected, enough translation space is provided for the shield machine operation, the construction is facilitated, and the construction period is ensured.

[0047] The temporary underpinning structure of the lattice column in the embodiment of the utility model has simple overall structure, fewer parts for assembly, large overall structural rigidity, fast construction, low cost, and is suitable for engineering application and promotion.

[0048] Further, the temporary underpinning structure further comprises two concrete pouring column piers 11, each concrete pouring column pier 11 is poured outside the lattice column at a node where the support compression rod 9 and the support tension rod 10 are connected. By adding the concrete pouring column pier 11, the integrity and stability of the connection between the node where the support compression rod 9 and the support tension rod 10 are connected and the lattice column can be further enhanced, and the safety of the temporary underpinning structure is further ensured.

[0049] Further, the first connecting steel plate 1 and the fourth connecting steel plate 8 are welded with the upper layer lattice column 3 of the lattice column 2 to be removed, the second connecting steel plate 4 and the third connecting steel plate 6 are welded with the left side lattice column 3 of the upper layer of the lattice column 2 to be removed and the right side lattice column 7 of the upper layer of the lattice column 2 to be removed respectively, the support compression rod 9 is welded with the first connecting steel plate 1, the second connecting steel plate 4 and the third connecting steel plate 6, and the support tension rod 10 is welded with the second connecting steel plate 4, the third connecting steel plate 6 and the fourth connecting steel plate 8. In this way, the temporary underpinning structure of the lattice column in the embodiment of the utility model is connected into an integral whole by mutual welding between steel members, the overall structure has large rigidity, can play a stable supporting transmission role during the construction of the underpinning structure, the overall structure of the temporary underpinning structure is simple, can be connected into an integral whole by simple welding, has low technical difficulty, and the installation and dismounting processes are relatively simple, so that the construction period can be saved and the operation difficulty of construction can be reduced, and the steel members can be recycled and reused in the later period, thereby reducing the construction cost.

[0050] Further, each support compression strut 9 of the embodiment comprises two first channel steels 901 symmetrically arranged, and the notches of the two first channel steels 901 face away from each other. That is, the support compression strut 9 of the embodiment adopts double-spliced channel steels, and the size of each first channel steel 901 needs to be determined through support structure calculation after the lattice column 2 is demolished. The support compression strut 9 is connected to the lattice column through welding of a steel plate at a node, and is welded to the outer side of the steel plate, and the openings of the double-spliced channel steels face outward. The top end of the support compression strut 9 is connected to the top end of the upper layer lattice column 3 of the lattice column 2 to be demolished, and the bottom end of the support compression strut 9 is connected to the bottom end of the upper layer left lattice column 5 and the upper layer right lattice column 7 of the lattice column 2 to be demolished, respectively, and the support compression strut 9 forms a herringbone-shaped steel support.

[0051] Further, each support compression strut 9 of the embodiment comprises two first channel steels 901 symmetrically arranged, and the notches of the two first channel steels 901 face away from each other. That is, the support compression strut 9 of the embodiment adopts double-spliced channel steels, and the size of each first channel steel 901 needs to be determined through support structure calculation after the lattice column 2 is demolished. The support compression strut 9 is connected to the lattice column through welding of a steel plate at a node, and is welded to the outer side of the steel plate, and the openings of the double-spliced channel steels face outward. The top end of the support compression strut 9 is connected to the top end of the upper layer lattice column 3 of the lattice column 2 to be demolished, and the bottom end of the support compression strut 9 is connected to the bottom end of the upper layer left lattice column 5 and the upper layer right lattice column 7 of the lattice column 2 to be demolished, respectively, and the support compression strut 9 forms a herringbone-shaped steel support.

[0052] In this way, the support compression strut 9 and the support tension strut 10 of the temporary underpinning structure of the embodiment both adopt integrally formed channel steels as steel members, and have better integrity, and the channel steels have the advantages of light weight, small internal stress, being able to bear larger load and distortion, and being convenient for welding construction. The assembled temporary underpinning structure has large rigidity, and can play a stable supporting and transferring role during the underpinning structure construction, thereby ensuring construction safety.

[0053] Further, the two first channel steels 901 of the embodiment are further connected with a plurality of first reinforcing steel plates, and the two ends of each first reinforcing steel plate are connected with the two first channel steels 901, respectively. By arranging the first reinforcing steel plates, the overall rigidity of the temporary underpinning structure can be further enhanced.

[0054] Further, the two first channel steels 901 of the embodiment are further connected with a plurality of first reinforcing steel plates, and the two ends of each first reinforcing steel plate are connected with the two first channel steels 901, respectively. By arranging the first reinforcing steel plates, the overall rigidity of the temporary underpinning structure can be further enhanced.

[0055] Further, the first connecting steel plate 1, the second connecting steel plate 4, the third connecting steel plate 6 and the fourth connecting steel plate 8 of the embodiment are all rectangular steel plates, the size of the rectangular steel plate needs to meet the welding length required by the support compression rod 9 and the support tension rod 10, and the thickness of the rectangular steel plate should not be less than the web thickness of the first channel steel 901 and the second channel steel 1011, so as to ensure the stability of the connection between the rectangular steel plate and the support compression rod 9 and the support tension rod 10.

[0056] Further, the support compression rod 9 and the support tension rod 10 of the embodiment are connected with the rectangular steel plate by three-face surrounding welding, and the minimum welding angle size is not less than 8mm.

[0057] The temporary underpinning structure of the lattice column can be applied to various situations where the lattice column needs to be removed, and the structural safety can be ensured through structural calculation and design.

[0058] The above embodiments only express several implementation manners of the utility model, and the description is relatively specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A temporary support structure for a lattice column, characterized in that, include: Two first connecting steel plates are symmetrically connected to the top of the upper layer of lattice column after the lattice column is removed; Two second connecting steel plates are symmetrically connected to the bottom end of the left-side lattice column on the upper layer above the demolished lattice column; Two third connecting steel plates are symmetrically connected to the bottom end of the right-side lattice column on the upper floor above the demolished lattice column; Two fourth connecting steel plates are symmetrically connected to the bottom end of the upper layer lattice column of the demolished lattice column; Two support rods are symmetrically connected to both sides of the upper-level lattice column of the demolished lattice column; the top of each support rod is connected to two first connecting steel plates, and the bottom of each support rod is connected to two second connecting steel plates or two third connecting steel plates. as well as, Two support rods are symmetrically connected to both sides of the upper-level lattice column of the demolished lattice column; one end of each support rod is connected to the fourth connecting steel plate, and the other end is connected to two second connecting steel plates or two third connecting steel plates; the two support rods and the two support tie rods are connected to form a triangle.

2. The temporary support structure for a lattice column as described in claim 1, characterized in that, It also includes two concrete-cast column piers, each of which is cast outside the lattice column at the node where the support compression rod and the support tie rod are connected.

3. A temporary support structure for a lattice column as described in claim 1, characterized in that, The first connecting steel plate and the fourth connecting steel plate are both welded to the upper layer lattice column of the dismantled lattice column; the second connecting steel plate and the third connecting steel plate are respectively welded to the left lattice column and the right lattice column of the upper layer of the dismantled lattice column; the supporting pressure rod is welded to the first connecting steel plate and the second connecting steel plate; the supporting tie rod is welded to the second connecting steel plate, the third connecting steel plate and the fourth connecting steel plate.

4. A temporary support structure for a lattice column as described in claim 3, characterized in that, Each of the support bars includes two symmetrically arranged first channel steels, with the slots of the two first channel steels facing away from each other.

5. A temporary support structure for a lattice column as described in claim 4, characterized in that, Each of the support rods includes two symmetrically arranged second channel steels, with the slots of the two second channel steels facing each other.

6. A temporary support structure for a lattice column as described in claim 5, characterized in that, Multiple first reinforcing steel plates are also connected between the two first channel steels, and each of the first reinforcing steel plates is connected to the two first channel steels at both ends.

7. A temporary support structure for a lattice column as described in claim 6, characterized in that, Multiple second reinforcing steel plates are also connected between the two second channel steels, and each of the two ends of the second reinforcing steel plates is connected to the two second channel steels respectively.

8. A temporary support structure for a lattice column as described in claim 7, characterized in that, The first connecting steel plate, the second connecting steel plate, the third connecting steel plate, and the fourth connecting steel plate are all rectangular steel plates. The dimensions of the rectangular steel plates must meet the weld length requirements of the support pressure rod and the support tie rod, and the thickness of the rectangular steel plates must not be less than the web thickness of the first channel steel and the second channel steel.

9. A temporary support structure for a lattice column as described in claim 8, characterized in that, The support pressure rod and the support tie rod are connected to the rectangular steel plate by three-sided welding, and the minimum weld corner size is not less than 8mm.

10. A temporary support structure for a lattice column as described in claim 9, characterized in that, The rectangular steel plate is connected to the lattice column by fillet weld, and the weld leg size is not less than the weld leg size of the support pressure rod and the support tie rod connected to the rectangular steel plate. The contact positions between the rectangular steel plate and the lattice column are all fully welded.

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