H-shaped steel plate reinforced wall based on TRD construction method and construction technology thereof

Abstract

The H-shaped steel plate reinforced wall based on the TRD construction method comprises a cement soil wall body, and a plurality of H-shaped steel plates which are transversely arranged are inserted into the cement soil wall body; an upper side wing and a lower side wing are arranged at two longitudinal ends of the H-shaped steel plate and are mutually spliced through groove structures at the end parts of the upper side wing and the lower side wing; an anchoring steel cover plate is connected to the top splicing position of the H-shaped steel plates, and the H-shaped steel plates are spliced into a whole. Compared with a traditional design, a groove structure and an anchoring steel cover plate at the joint of the H-shaped steel plates are added to form a TRD continuous wall unit body, and the H-shaped steel plates are inserted before the strength of cement soil is generated, so that horizontal force is not borne by single H-shaped steel, but is dispersed by a system formed by mutual connection and mutual reaction of the H-shaped steel plates, and the strength of the TRD continuous wall is improved. The lateral rigidity of the underground diaphragm wall is remarkably improved, and the risks of local water permeation, water seepage, cracking and collapse are greatly reduced under the condition that horizontal force is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support in geotechnical engineering, and in particular to an H-shaped steel plate reinforced wall based on a TRD method and a construction process thereof. Background Art

[0002] Underground continuous wall is a common construction project. A deep trench is dug underground by machinery, a steel cage is suspended in the trench, and concrete is poured using the conduit method. Ultimately, a continuous reinforced concrete wall is formed as a load-bearing and water-retaining structure.

[0003] As an advanced underground continuous wall construction technology, TRD method uses a special cutting box to cut and mix soil and cement slurry on the ground to form a continuous anti-seepage wall. It changes the traditional underground continuous wall pile position discontinuous mode, and uses special cutting tools to cut and mix soil in different strata. It has the advantages of being applicable to a wide range of geological conditions, good wall continuity, high construction accuracy, low noise, low vibration, fast construction speed, high material controllability, reduced earth excavation, and high efficiency and energy saving.

[0004] The invention with publication number 108589699A discloses an H-steel TRD wall with an internal insertion. The wall structure is strengthened by inserting H-steel into the TRD wall. However, the construction is carried out by inserting a single H-steel, which has inaccurate construction accuracy and a gap between the left and right steels, which is prone to leakage. If the joints are not properly handled or the concrete is not dense enough, groundwater can easily penetrate through the construction joints, thereby affecting the waterproof performance of the underground continuous wall. At the same time, the poor combination of the steel and the concrete side wall during the construction process may lead to insufficient local strength, thereby affecting the overall bearing capacity and safety of the structure.

[0005] The traditional CSM method piles first construct the first phase wall, and then the second phase wall. The construction speed is slow, the wall continuity is mainly controlled by humans, and the wall continuity cannot be guaranteed. The cement slurry mixing degree between the two phase walls cannot be guaranteed to be uniform. For the CSM method wall, the lateral stiffness of the wall is mainly supported by steel. When encountering high lateral pressure such as near the river, it cannot guarantee that the side wall is completely waterproof and support deformation occurs. If only relying on steel to provide lateral stiffness, the cost of steel will increase sharply, and the cross-section of the wall will also increase, thereby reducing the economy of the wall and increasing the construction process. Summary of the invention

[0006] In view of the above problems, the present invention proposes an H-shaped steel plate reinforced wall and its construction process based on the TRD method. The design concept is to increase the underground stiffness and waterproof performance of the wall by changing the construction method of the cement soil wall and the connection position and method of the H-shaped steel plate.

[0007] An H-shaped steel plate reinforced wall based on the TRD method comprises a cement soil wall 5, in which a plurality of transversely arranged H-shaped steel plates 1 and a plurality of anchoring steel cover plates 6 are inserted;

[0008] The H-shaped steel plate 1 comprises a longitudinal web, one longitudinal end of the web is provided with a transversely extending upper wing 2, and the other end is provided with a transversely extending lower wing 3; bolt holes 4 are provided on the upper wing 2 and the lower wing 3; the transverse ends of the upper wing 2 are engaged with the upper wing 2 of the adjacent H-shaped steel plate 1 through a groove structure, and the transverse ends of the lower wing 3 are engaged with the lower wing 3 of the adjacent H-shaped steel plate 1 through a groove structure;

[0009] An anchoring steel cover plate 6 is laid on the top of the connection between adjacent H-shaped steel plates 1, and a reserved hole 61 is provided on the anchoring steel cover plate 6; the position of the reserved hole 61 corresponds to the bolt hole 4 up and down, and the bolt holes 4 of the two adjacent H-shaped steel plates 1 are fixed by bolt connection, so that the adjacent H-shaped steel plates 1 are fixed as a whole.

[0010] More specifically, a limit block 62 that can slide back and forth is provided at the bottom of the anchor steel cover plate 6, and the limit block 62 can clamp the upper side wing 2 and the lower side wing 3; a torsion column 7 is provided at one longitudinal end of the anchor steel cover plate 6; the torsion column 7 is transmission-connected to the limit block 62, and the rotation of the torsion column 7 can make the limit block 62 slide back and forth.

[0011] More specifically, the torsion post 7 includes a threaded post 64 and an isopentagon 63 , and the isopentagon 63 can be engaged with an external wrench.

[0012] More specifically, the transverse distance between the bolt hole 4 and the web is smaller than the transverse distance between the bolt hole 4 and the ends of the upper wing 2 and the lower wing 3 .

[0013] More specifically, the longitudinal length of the anchoring steel cover plate 6 is greater than the distance between the upper wing 2 and the lower wing 3 .

[0014] A construction process for H-shaped steel plate reinforced wall based on TRD method, the steps of which include:

[0015] 1) inserting an external TRD chain slotting machine into the ground, cutting the soil with the TRD chain slotting machine cutting box, injecting cutting fluid and curing fluid to fully mix the soil with cement slurry to form a cement soil wall 5;

[0016] 2) Before the cement in the cement soil wall 5 hardens, the H-shaped steel plates 1 are sequentially inserted into the cement soil wall 5 along a horizontal queue, and an inclinometer is used to ensure the verticality of the H-shaped steel plates 1; when inserting adjacent H-shaped steel plates 1, the groove structure of the upper wing 2 of the H-shaped steel plate 1 inserted later is engaged with the groove structure of the upper wing 2 of the H-shaped steel plate 1 inserted earlier, and the groove structure of the lower wing 3 of the H-shaped steel plate 1 inserted later is engaged with the groove structure of the lower wing 3 of the H-shaped steel plate 1 inserted earlier, so that the queue of installed H-shaped steel plates 1 remains flat;

[0017] 3) Use a crane to lift the anchor steel cover plate 6 to the joint of the adjacent H-shaped steel plate 1. The position of the reserved hole 61 of the anchor steel cover plate 6 corresponds to the bolt hole 4 of the H-shaped steel plate 1. At this time, insert the bolt through the reserved hole 61 and the bolt hole 4 to fix the anchor steel cover plate 6.

[0018] 4) Rotate the torsion column 7 and move the limit block 62 so that the limit block 62 clamps the upper wing 2 and the lower wing 3 respectively;

[0019] 5) External staff completes the maintenance of the cement soil wall 5, digs out the soil in the foundation pit surrounded by the cement soil wall 5, and completes the construction of the main structure of the underground building;

[0020] 6) Pull out the H-shaped steel plate 1 in the cement soil wall 5.

[0021] More specifically, the specific steps of pulling out the H-shaped steel plate in the cement soil wall 5 in step 6) include:

[0022] 6.1) Use a pneumatic wrench to rotate the torsion column 7 of the anchor steel cover plate 6 so that the limit block 62 loosens the upper side wing 2 and the lower side wing 3 of the H-shaped steel plate;

[0023] 6.2) Unscrew the bolts in the reserved holes 61 and use a crane to remove the anchor steel cover plate 6 from the top of the H-shaped steel plate 1;

[0024] 6.3) Align and fix the H-shaped steel plate 1 with the external guide frame, and use the steel jacking machine and the crane suspension beam to pull it out.

[0025] More specifically, before the H-shaped steel plate 1 is inserted into the cement soil wall 5 , a friction reducing agent is applied on the surface of the H-shaped steel plate 1 .

[0026] The beneficial effects of the present invention are:

[0027] The practice of inserting steel sections in traditional construction technology was changed, and groove structures and anchor steel cover plates were added at the joints of H-shaped steel plates to form TRD continuous wall units. H-shaped steel plates were inserted before the strength of cement soil was generated, so that the horizontal force is no longer borne by a single H-shaped steel, but is dispersed by a system of several H-shaped steel plates that are interconnected and react to each other, which significantly improves the lateral stiffness of the underground continuous wall and greatly reduces the risks of local water seepage, cracking and collapse in the event of increased horizontal force. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a general plan view of an H-shaped steel plate reinforced wall based on the TRD method of the present invention;

[0029] Figure 2 A top view of an H-shaped steel plate for reinforcing a wall using an H-shaped steel plate based on a TRD method according to the present invention;

[0030] Figure 3 This is an elevation view of an H-shaped steel plate for reinforcing a wall using an H-shaped steel plate based on a TRD method according to the present invention;

[0031] Figure 4 A side view of an H-shaped steel plate for reinforcing a wall using an H-shaped steel plate based on a TRD method according to the present invention;

[0032] Figure 5 This is a vertical view of an anchor steel cover plate of an H-shaped steel plate reinforced wall based on the TRD method of the present invention;

[0033] Figure 6 It is a schematic diagram of a torsion column structure of an H-shaped steel plate reinforced wall based on the TRD method of the present invention;

[0034] Figure 7 A side view of a torsion column of an H-shaped steel plate reinforced wall based on the TRD method of the present invention;

[0035] Figure 8 This is a front view of a torsion column of an H-shaped steel plate reinforced wall based on the TRD method of the present invention. DETAILED DESCRIPTION

[0036] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0037] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0042] The present invention will be described in detail below in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0043] An H-shaped steel plate reinforced wall based on the TRD method comprises a cement soil wall 5, in which a plurality of transversely arranged H-shaped steel plates 1 and a plurality of anchoring steel cover plates 6 are inserted;

[0044] The H-shaped steel plate 1 comprises a longitudinal web, one longitudinal end of the web is provided with a transversely extending upper wing 2, and the other end is provided with a transversely extending lower wing 3; bolt holes 4 are provided on the upper wing 2 and the lower wing 3; the transverse ends of the upper wing 2 are engaged with the upper wing 2 of the adjacent H-shaped steel plate 1 through a groove structure, and the transverse ends of the lower wing 3 are engaged with the lower wing 3 of the adjacent H-shaped steel plate 1 through a groove structure;

[0045] An anchoring steel cover plate 6 is laid on the top of the connection between adjacent H-shaped steel plates 1, and a reserved hole 61 is provided on the anchoring steel cover plate 6; the position of the reserved hole 61 corresponds to the bolt hole 4 up and down, and the bolt holes 4 of the two adjacent H-shaped steel plates 1 are fixed by bolt connection, so that the adjacent H-shaped steel plates 1 are fixed as a whole.

[0046] In some embodiments, a limit block 62 that can slide back and forth is provided at the bottom of the anchoring steel cover plate 6, and the limit block 62 can clamp the upper side wing 2 and the lower side wing 3; a torsion column 7 is provided at one longitudinal end of the anchoring steel cover plate 6; the torsion column 7 is transmission-connected to the limit block 62, and the rotation of the torsion column 7 can make the limit block 62 slide back and forth.

[0047] In some embodiments, the torsion post 7 includes a threaded post 64 and an isopentagon 63 , and the isopentagon 63 can be engaged with an external wrench.

[0048] In some embodiments, the transverse distance between the bolt hole 4 and the web is smaller than the transverse distance between the bolt hole 4 and the ends of the upper wing 2 and the lower wing 3 .

[0049] In some embodiments, the longitudinal length of the anchoring steel cover plate 6 is greater than the distance between the upper wing 2 and the lower wing 3 .

[0050] A construction process for H-shaped steel plate reinforced wall based on TRD method, the steps of which include:

[0051] 1) inserting an external TRD chain slotting machine into the ground, cutting the soil with the TRD chain slotting machine cutting box, injecting cutting fluid and curing fluid to fully mix the soil with cement slurry to form a cement soil wall 5;

[0052] 2) Before the cement in the cement soil wall 5 hardens, the H-shaped steel plates 1 are sequentially inserted into the cement soil wall 5 along a horizontal queue, and an inclinometer is used to ensure the verticality of the H-shaped steel plates 1; when inserting adjacent H-shaped steel plates 1, the groove structure of the upper wing 2 of the H-shaped steel plate 1 inserted later is engaged with the groove structure of the upper wing 2 of the H-shaped steel plate 1 inserted earlier, and the groove structure of the lower wing 3 of the H-shaped steel plate 1 inserted later is engaged with the groove structure of the lower wing 3 of the H-shaped steel plate 1 inserted earlier, so that the queue of installed H-shaped steel plates 1 remains flat;

[0053] 3) Use a crane to lift the anchor steel cover plate 6 to the joint of the adjacent H-shaped steel plate 1. The position of the reserved hole 61 of the anchor steel cover plate 6 corresponds to the bolt hole 4 of the H-shaped steel plate 1. At this time, insert the bolt through the reserved hole 61 and the bolt hole 4 to fix the anchor steel cover plate 6.

[0054] 4) Rotate the torsion column 7 and move the limit block 62 so that the limit block 62 clamps the upper wing 2 and the lower wing 3 respectively;

[0055] 5) External staff completes the maintenance of the cement soil wall 5, digs out the soil in the foundation pit surrounded by the cement soil wall 5, and completes the construction of the main structure of the underground building;

[0056] 6) Pull out the H-shaped steel plate 1 in the cement soil wall 5.

[0057] In some embodiments, the specific steps of pulling out the H-shaped steel plate in the cement soil wall 5 in step 6) include:

[0058] 6.1) Use a pneumatic wrench to rotate the torsion column 7 of the anchor steel cover plate 6 so that the limit block 62 loosens the upper side wing 2 and the lower side wing 3 of the H-shaped steel plate;

[0059] 6.2) Unscrew the bolts in the reserved holes 61 and use a crane to remove the anchor steel cover plate 6 from the top of the H-shaped steel plate 1;

[0060] 6.3) Align and fix the H-shaped steel plate 1 with the external guide frame, and use the steel jacking machine and the crane suspension beam to pull it out.

[0061] In some embodiments, before the H-shaped steel plate 1 is inserted into the cement soil wall 5 , a friction reducing agent is applied to the surface of the H-shaped steel plate 1 .

[0062] The beneficial effects of the present invention are:

[0063] The practice of inserting steel sections in traditional construction technology was changed, and groove structures and anchor steel cover plates were added at the joints of H-shaped steel plates to form TRD continuous wall units. H-shaped steel plates were inserted before the strength of cement soil was generated, so that the horizontal force is no longer borne by a single H-shaped steel, but is dispersed by a system of several H-shaped steel plates that are interconnected and react to each other, which significantly improves the lateral stiffness of the underground continuous wall and greatly reduces the risks of local water seepage, cracking and collapse in the event of increased horizontal force.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An H-shaped steel plate reinforced wall based on the TRD method, characterized in that: It comprises a cement soil wall (5), in which a plurality of transversely arranged H-shaped steel plates (1) and a plurality of anchoring steel cover plates (6) are inserted; The H-shaped steel plate (1) comprises a longitudinal web, one longitudinal end of the web is provided with a transversely extending upper side wing (2), and the other end is provided with a transversely extending lower side wing (3); bolt holes (4) are provided on the upper side wing (2) and the lower side wing (3); the transverse ends of the upper side wing (2) are engaged with the upper side wing (2) of the adjacent H-shaped steel plate (1) through a groove structure, and the transverse ends of the lower side wing (3) are engaged with the lower side wing (3) of the adjacent H-shaped steel plate (1) through a groove structure; An anchoring steel cover plate (6) is laid on the top of the connection between adjacent H-shaped steel plates (1), and a reserved hole (61) is provided on the anchoring steel cover plate (6); the position of the reserved hole (61) corresponds to the bolt hole (4) in the upper and lower parts, and the bolt holes (4) of the two adjacent H-shaped steel plates (1) are fixed by bolt connection, so that the adjacent H-shaped steel plates (1) are fixed as a whole.

2. The H-shaped steel plate reinforced wall based on the TRD method according to claim 1 is characterized in that: A limit block (62) capable of sliding forward and backward is provided at the bottom of the anchoring steel cover plate (6), and the limit block (62) can clamp the upper side wing (2) and the lower side wing (3); a torsion column (7) is provided at one longitudinal end of the anchoring steel cover plate (6); the torsion column (7) is transmission-connected to the limit block (62), and the rotation of the torsion column (7) can cause the limit block (62) to slide forward and backward.

3. The H-shaped steel plate reinforced wall based on the TRD method according to claim 2 is characterized in that: The torsion column (7) comprises a threaded column (64) and an isopentagon (63), and the isopentagon (63) can be engaged with an external wrench.

4. The H-shaped steel plate reinforced wall based on the TRD method according to claim 1 is characterized in that: The transverse distance from the bolt hole (4) to the web is smaller than the transverse distance from the bolt hole (4) to the ends of the upper wing (2) and the lower wing (3).

5. The H-shaped steel plate reinforced wall based on the TRD method according to claim 1 is characterized in that: The longitudinal length of the anchoring steel cover plate (6) is greater than the distance between the upper side wing (2) and the lower side wing (3).

6. The construction process of the H-shaped steel plate reinforced wall based on the TRD method according to claim 1, comprising the following steps: 1) inserting an external TRD chain slotting machine into the ground, cutting the soil with the TRD chain slotting machine cutting box, injecting cutting fluid and curing fluid to fully mix the soil with cement slurry to form a cement soil wall (5); 2) Before the cement in the cement soil wall (5) hardens, the H-shaped steel plates (1) are sequentially inserted into the cement soil wall (5) along a horizontal queue, and an inclinometer is used to ensure the verticality of the H-shaped steel plates (1); when inserting adjacent H-shaped steel plates (1), the groove structure of the upper wing (2) of the H-shaped steel plate (1) inserted later is engaged with the groove structure of the upper wing (2) of the H-shaped steel plate (1) inserted earlier, and the groove structure of the lower wing (3) of the H-shaped steel plate (1) inserted later is engaged with the groove structure of the lower wing (3) of the H-shaped steel plate (1) inserted earlier, so that the queue of installed H-shaped steel plates (1) remains flat; 3) Use a crane to lift the anchor steel cover plate (6) to the joint of the adjacent H-shaped steel plates (1), so that the position of the reserved hole (61) of the anchor steel cover plate (6) corresponds to the bolt hole (4) of the H-shaped steel plate (1) in the upper and lower directions; at this time, insert the bolt through the reserved hole (61) and the bolt hole (4) to fix the anchor steel cover plate (6); 4) rotating the torsion column (7) and moving the limit block (62) so that the limit block (62) clamps the upper side wing (2) and the lower side wing (3) respectively; 5) External staff completes the maintenance of the cement soil wall (5), digs out the soil in the foundation pit surrounded by the cement soil wall (5), and completes the construction of the main structure of the underground building; 6) Pull out the H-shaped steel plate (1) in the cement soil wall (5).

7. The construction process of the H-shaped steel plate reinforced wall based on the TRD method according to claim 6 is characterized by: Step 6) The specific steps of pulling out the H-shaped steel plate in the cement soil wall (5) include: 6.1) Use a pneumatic wrench to rotate the torsion column (7) of the anchor steel cover plate (6) so that the limit block (62) loosens the upper side wing (2) and the lower side wing (3) of the H-shaped steel plate; 6.2) Unscrew the bolts in the reserved holes (61) and use a crane to remove the anchor steel cover plate (6) from the top of the H-shaped steel plate (1); 6.3) Align and fix the H-shaped steel plate (1) with the external guide frame, and use a steel jacking machine in conjunction with the crane suspension beam to pull it out.

8. The construction process of the H-shaped steel plate reinforced wall based on the TRD method according to claim 6 is characterized by: In step 2), before the H-shaped steel plate (1) is inserted into the cement soil wall (5), a friction reducing agent is applied to the surface of the H-shaped steel plate (1).

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