Retaining wall combined type slope construction supporting structure suitable for narrow space

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a retaining wall combined type slope construction supporting structure suitable for a narrow space, which comprises a slope and a plurality of steps arranged on a slope body and located in a land use red line. A steel sheet pile is inserted in the vertical surface position of each step; waist beams are arranged at the positions, close to the upper ends, of the outer side faces of the steel sheet piles, and crown beams are arranged at the tops of the steel sheet piles. And a diagonal bracing steel pipe is arranged between the waist beam of the upper-stage steel sheet pile and the top beam of the lower-stage steel sheet pile. The inclined strut steel pipe is used for well supporting the cantilever end at the upper part of the steel sheet pile, so that the cantilever end at the upper end of the steel sheet pile is effectively prevented from inclining and bending, and the stability of the steel sheet pile support is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a retaining wall composite slope construction support structure suitable for narrow spaces. Background Art

[0002] Retaining wall composite slope is a common form of slope management for the periphery of municipal engineering sites. In the actual construction process, in order to facilitate the construction of retaining walls, the existing technology generally adopts the method of slope excavation to form the retaining wall base surface. However, the slope excavation ratio is determined by the on-site geological conditions. If the slope rock and soil are mainly soft soil or fully weathered rock, the excavation slope ratio is often required to be slower than 1:1.5, which will result in a wider range of excavation slope lines. However, municipal engineering and other projects generally have strict red line restrictions on construction land, resulting in a relatively narrow space for slope implementation.

[0003] Among the existing support structures, a patent application with publication number CN109826201A discloses a stepped support method for a foundation pit in soft soil, the steps of which include: a. excavating the original ground with natural slope to form a first-level platform, and vertically driving the first-level steel sheet piles along the circumference of the foundation pit on the first-level platform; b. continuing to excavate inward from the inner side of the first-level steel sheet pile to form a construction platform, and using the mixing pile drilling rig to construct mixing piles in the form of empty piles at the top and solid piles at the bottom on the construction platform; c. digging down from the outside to the inside on the construction platform in sequence, so that the empty piles above the solid piles of each level of the mixing piles are excavated to form each platform, and vertically driving the steel sheet piles on the outside of each platform close to the solid piles; until the excavation is flush with the bottom elevation of the foundation pit.

[0004] However, in the above-mentioned prior art, since the upper end of the steel sheet pile forms a cantilever end, the cantilever end is easily tilted and bent under the pressure of soil and rock, resulting in unstable steel sheet pile support. Utility Model Content

[0005] The main purpose of the utility model is to propose a retaining wall composite slope construction support structure suitable for narrow spaces, aiming to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the utility model proposes a retaining wall composite slope construction support structure suitable for narrow spaces, including a slope and a plurality of steps arranged on the slope and located within the red line of the land; steel sheet piles are inserted at the vertical surface position of each step; a waist beam is arranged at a position near the upper end of the outer side surface of the steel sheet pile, and a crown beam is arranged on the top of the steel sheet pile; a diagonal bracing steel pipe is arranged between the waist beam of the upper steel sheet pile and the crown beam of the lower steel sheet pile.

[0007] Preferably, the upper and lower ends of the diagonal bracing steel pipe are clamped with the waist beam and the crown beam using a clamping groove structure.

[0008] Preferably, a first card slot is provided on the front surface of the waist beam, and a second card slot is provided on the top surface of the crown beam; the upper end of the inclined support steel pipe is clamped in the first card slot; the lower end of the inclined support steel pipe is clamped in the second card slot.

[0009] Preferably, the lower end and the front surface of the first card slot are open, and the first card slot has a first top wall and a first bottom wall; the upper end of the inclined support steel pipe is bent to form a first insertion part; when the first insertion part is inserted into the first card slot, the back surface of the first insertion part abuts against the first bottom wall of the first card slot, and the top end of the first insertion part abuts against the first top wall of the first card slot.

[0010] Preferably, the top surface and the rear end of the second card slot are open, and the second card slot has a rear side wall and a second bottom wall; the lower end of the inclined support steel pipe is bent to form a second insertion part; when the second insertion part is inserted into the second card slot, the bottom surface of the second insertion part abuts against the second bottom wall of the second card slot, and the rear end of the second insertion part abuts against the rear side wall of the second card slot.

[0011] Preferably, chamfer angles are provided at the edge of the opening of the first card slot and the second card slot.

[0012] Preferably, the top surface of the topmost step is flush with the original ground surface, and a slope top intercepting ditch is provided on the top surface of the topmost step.

[0013] Preferably, the support structure further includes a retaining wall; a retaining wall foundation surface is excavated at the bottom of the lowermost step; the retaining wall is arranged on the retaining wall foundation surface and abuts against the steel sheet piles on the vertical surface of the lowermost step; after the retaining wall is built, all the inclined support steel pipes are removed and all the steel sheet piles are pulled out.

[0014] Preferably, the height H of the retaining wall is not less than the sum of the heights of two steps.

[0015] Preferably, except for the top surface of the topmost step, in the triangular area of the top surface of each step, earthwork backfilling and compaction are adopted to form backfill blocks; the backfill blocks have inclined slopes; the top end of the slope is connected to the top edge of the topmost step, and the lower end of the slope is connected to the top edge of the retaining wall.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0017] (1) In the present utility model, a waist beam is provided at a position near the upper end on the outer side surface of the steel sheet pile, a crown beam is provided at the top of the steel sheet pile, and an inclined support steel pipe is provided between the waist beam of the upper-level steel sheet pile and the crown beam of the lower-level steel sheet pile. The inclined support steel pipe plays a good supporting role in the cantilever end of the upper part of the steel sheet pile, effectively avoiding the inclination and bending of the cantilever end at the upper end of the steel sheet pile, and enhancing the stability of the steel sheet pile support.

[0018] (2) In the present utility model, by providing a retaining wall and backfill blocks, the support function is further enhanced. After the construction of the retaining wall is completed, the extraction and recycling of components such as steel sheet piles and inclined support steel pipes can play a role in repeated utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 Schematic diagram after inserting the first-stage steel sheet pile and excavating to form the first-stage excavation platform;

[0021] Figure 2 Schematic diagram after inserting the second-stage steel sheet pile and installing the waist beam, capping beam, and inclined support steel pipe on the first-stage excavation platform;

[0022] Figure 3 Schematic diagram after excavating to form the second-stage excavation platform, inserting the third-stage steel sheet pile, and installing the waist beam, capping beam, and inclined support steel pipe;

[0023] Figure 4 Schematic diagram after excavating to form the foundation surface of the retaining wall;

[0024] Figure 5 Schematic diagram when, after the completion of the construction of the retaining wall, all inclined support steel pipes are removed and all steel sheet piles are extracted, and earthwork is used for backfilling and compaction to form backfill blocks;

[0025] Figure 6 Schematic diagram of the structure of the waist beam, capping beam, and inclined support steel pipe in cooperation in the present utility model;

[0026] Figure 7 For Figure 6 Enlarged view of part A in

[0027] Figure 8 For Figure 6 Enlarged view of part B in

[0028] Description of the attached reference numerals: 1. Ridge top intercepting ditch; 2. Steel sheet pile; 3. Land use red line; 4. Original ground line; 5. First-level excavation platform; 6. Slope body; 6a. Step; 7. Inclined support steel pipe; 7a. First insertion part; 7b. Second insertion part; 8. Waling beam; 8a. First card slot; 8b. First top wall; 8c. First bottom wall; 9. Capping beam; 9a. Second card slot; 9b. Rear side wall; 9c. Second bottom wall; 10. Reverse chamfer; 11. Second-level excavation platform; 12. Retaining wall foundation surface; 13. Retaining wall; 14. Backfill block. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0032] As shown in the accompanying drawings, a retaining wall composite slope construction support structure suitable for narrow spaces includes a slope body 6 and multiple levels of steps 6a provided on the slope body 6 and within the land use red line 3; steel sheet piles 2 are inserted at the vertical plane positions of each level of step 6a; a waling beam 8 is provided at a position near the upper end of the outer side of the steel sheet pile 2, and a capping beam 9 is provided at the top of the steel sheet pile 2; an inclined support steel pipe 7 is provided between the waling beam 8 of the upper-level steel sheet pile 2 and the capping beam 9 of the lower-level steel sheet pile 2.

[0033] Combined with Figures 6 to 8As shown in the figure, in order to facilitate the installation of the inclined strut steel pipe 7, the upper and lower ends of the inclined strut steel pipe 7 and the waist beam 8 and the crown beam 9 adopt a clamping groove structure for clamping connection, forming a structure that can be quickly installed and disassembled. Specifically, a first clamping groove 8a is provided on the front surface of the waist beam 8, and a second clamping groove 9a is provided on the top surface of the crown beam 9; the upper end of the inclined strut steel pipe 7 is clamped in the first clamping groove 8a; the lower end of the inclined strut steel pipe 7 is clamped in the second clamping groove 9a. Further, the lower end and the front surface of the first clamping groove 8a are open, and the first clamping groove 8a has a first top wall 8b and a first bottom wall 8c; the upper end of the inclined strut steel pipe 7 is bent to form a first insertion part 7a; when the first insertion part 7a is inserted into the first clamping groove 8a, the back surface of the first insertion part 7a abuts against the first bottom wall 8c of the first clamping groove 8a, and the top end of the first insertion part 7a abuts against the first top wall 8b of the first clamping groove 8a. The top surface and the rear end of the second clamping groove 9a are open, and the second clamping groove 9a has a rear side wall 9b and a second bottom wall 9c; the lower end of the inclined strut steel pipe 7 is bent to form a second insertion part 7b; when the second insertion part 7b is inserted into the second clamping groove 9a, the bottom surface of the second insertion part 7b abuts against the second bottom wall 9c of the second clamping groove 9a, and the rear end of the second insertion part 7b abuts against the rear side wall 9b of the second clamping groove 9a.

[0034] Combined with Figure 7 and Figure 8 As shown, chamfered edges 10 are provided at the edges of the openings of the first clamping groove 8a and the second clamping groove 9a. The purpose of setting the chamfered edges 10 is to play a guiding role and facilitate the installation of the inclined strut steel pipe 7.

[0035] Combined with Figures 1 to 5 As shown, the top surface of the topmost step 6a is flush with the original ground, that is, the top surface of the topmost step 6a is flush with the original ground line 4, and a slope top catchment ditch 1 is provided on the top surface of the topmost step 6a.

[0036] Combined with Figure 5 As shown, the support structure further includes a retaining wall 13; a retaining wall foundation surface 12 is excavated at the bottom of the lowermost step 6a; the retaining wall 13 is arranged on the retaining wall foundation surface 12, and the retaining wall 13 abuts against the steel sheet pile 2 on the vertical surface of the lowermost step 6a; after the retaining wall 13 is built, all the inclined strut steel pipes 7 and all the steel sheet piles 2 are removed. Further, in order to ensure the blocking effect of the retaining wall 13, it is required that the height H of the retaining wall 13 is not less than the sum of the heights of two steps 6a.

[0037] Combined with Figure 5As shown, except for the top surface of the topmost step 6a, earthwork backfill and compaction are carried out in the triangular area on the top surface of each step 6a to form a backfill block 14; the backfill block 14 has an inclined slope surface 14a; the top end of the slope surface 14a is connected to the top edge of the topmost step 6a, and the lower end of the slope surface 14a is connected to the top edge of the retaining wall 13.

[0038] With the above support structure, the construction process includes the following steps:

[0039] S1. Determine the grading plan for the excavation steps 6a: According to the design requirements, determine the height difference from the retaining wall foundation surface 12 at the bottom of the retaining wall 13 to the slope top, and the horizontal distance from the retaining wall 13 to the land use red line 3, and further determine the number of steps 6a for graded excavation and support, as well as the height and width of each step 6a.

[0040] S2. Parameter calculation of the steel sheet pile 2: According to the geological exploration data, calculate and determine the parameters such as the required embedded depth, type and specification of the steel sheet pile for each step when using the steel sheet pile support. The parameter calculation of the steel sheet pile 2 is a conventional existing technology and will not be elaborated here.

[0041] S3. Implementation of the multi-level steel sheet pile 2 support structure:

[0042] ① Vertically drive the first-level steel sheet pile inside the land use red line 3 at the top of the slope body 6. The top of the first-level steel sheet pile is flush with the top of the slope body 6. Specifically, as Figure 1 shown.

[0043] ② Starting from the outer side of the first-level steel sheet pile, excavate the first-level excavation platform 5 with a depth corresponding to the cantilever section of the steel sheet pile. Reserve a step 6a with a corresponding width on the first-level excavation platform 5. Vertically drive the second-level steel sheet pile along the outside of this step 6a. The top surface of the second-level steel sheet pile is flush with the first-level excavation platform 5; a waist beam 8 is set at a position near the upper end on the outer side of the first-level steel sheet pile, and a capping beam 9 is set at the top of the second-level steel sheet pile. A diagonal bracing steel pipe 7 is set between the waist beam 8 and the capping beam 9 to enhance the stability of the steel sheet pile. Specifically, as Figure 2 shown.

[0044] ③ Starting from the outer side of the second-level steel sheet pile, excavate the second-level excavation platform 11 with a depth corresponding to the cantilever section of the steel sheet pile. Reserve a step 6a with a corresponding width on the second-level excavation platform 11. Vertically drive the third-level steel sheet pile along the outside of this step 6a. The top surface of the third-level steel sheet pile is flush with the second-level excavation platform 11. A waist beam 8 is set at a position near the upper end on the outer side of the second-level steel sheet pile, and a capping beam 9 is set at the top of the third-level steel sheet pile. A diagonal bracing steel pipe 7 is set between the waist beam 8 and the capping beam 9 to enhance the stability of the steel sheet pile. Specifically, as Figure 3 shown.

[0045] ④ Repeat the above steps until reaching the retaining wall foundation surface 12. Specifically, asFigure 4 as shown

[0046] ⑤ After the foundation surface 12 of the retaining wall is formed, the wall construction of the retaining wall 13 is immediately carried out. After the construction of the retaining wall 13 is completed, all the inclined support steel pipes 7 are removed and all the steel sheet piles 2 are pulled out, and the backfill block 14 is formed by using earthwork rolling. Thus, the construction of the entire retaining wall composite slope is completed. Specifically, as Figure 5 shown

[0047] By adopting the above construction method, the slope construction excavation can be ensured to be carried out within the land use red line range, without causing interference or influence on the outside of the red line range; compared with the conventional slope excavation, the multi-level steel sheet pile support method can significantly reduce the earthwork excavation quantity; at the same time, it can also significantly reduce the earthwork rolling and backfilling quantity.

[0048] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the concept of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A retaining wall composite slope construction support structure suitable for narrow spaces, comprising a slope body (6), and a plurality of steps (6a) arranged on the slope body (6) and located within a land red line (3); a steel sheet pile (2) is inserted at a vertical position of each step (6a); and the characteristics are: A waist beam (8) is arranged on the outer side surface of the steel sheet pile (2) near the upper end, and a crown beam (9) is arranged on the top of the steel sheet pile (2); a diagonal bracing steel pipe (7) is arranged between the waist beam (8) of the upper-level steel sheet pile (2) and the crown beam (9) of the lower-level steel sheet pile (2).

2. A retaining wall composite slope construction support structure suitable for narrow spaces as claimed in claim 1, characterized in that: The upper and lower ends of the diagonal bracing steel pipe (7) are clamped with the waist beam (8) and the crown beam (9) by using a clamping groove structure.

3. A retaining wall composite slope construction support structure suitable for narrow space as claimed in claim 2, characterized in that: A first clamping groove (8a) is provided on the front surface of the waist beam (8), and a second clamping groove (9a) is provided on the top surface of the crown beam (9); the upper end of the diagonal bracing steel pipe (7) is clamped in the first clamping groove (8a); and the lower end of the diagonal bracing steel pipe (7) is clamped in the second clamping groove (9a).

4. A retaining wall composite slope construction support structure suitable for narrow space as claimed in claim 3, characterized in that: The lower end and the front side of the first slot (8a) are open, and the first slot (8a) is provided with a first top wall (8b) and a first bottom wall (8c); the upper end of the diagonal bracing steel pipe (7) is bent to form a first plug-in portion (7a); when the first plug-in portion (7a) is inserted into the first slot (8a), the back side of the first plug-in portion (7a) abuts against the first bottom wall (8c) of the first slot (8a), and the top side of the first plug-in portion (7a) abuts against the first top wall (8b) of the first slot (8a).

5. The composite slope construction support structure for retaining walls suitable for narrow spaces as claimed in claim 3, characterized in that: The top surface and rear end of the second card slot (9a) are open, and the second card slot (9a) has a rear side wall (9b) and a second bottom wall (9c); the lower end of the diagonal bracing steel pipe (7) is bent to form a second plug-in portion (7b); when the second plug-in portion (7b) is inserted into the second card slot (9a), the bottom surface of the second plug-in portion (7b) abuts against the second bottom wall (9c) of the second card slot (9a), and the rear end of the second plug-in portion (7b) abuts against the rear side wall (9b) of the second card slot (9a).

6. A retaining wall composite slope construction support structure suitable for narrow space as claimed in claim 3, characterized in that: Chamfered corners (10) are provided at the edges of the mouths of the first clamping slot (8a) and the second clamping slot (9a).

7. The composite slope construction support structure for retaining walls suitable for narrow spaces as claimed in claim 1, characterized in that: The top surface of the topmost step (6a) is flush with the original ground, and a slope top intercepting ditch (1) is arranged on the top surface of the topmost step (6a).

8. The composite slope construction support structure for retaining walls suitable for narrow spaces as claimed in claim 1, characterized in that: It also includes a retaining wall (13); the bottom of the lowest step (6a) is excavated to form a retaining wall foundation surface (12); the retaining wall (13) is arranged on the retaining wall foundation surface (12), and the retaining wall (13) is against the steel sheet piles (2) on the vertical surface of the lowest step (6a); when the retaining wall (13) is built, all the diagonal bracing steel pipes (7) are removed and all the steel sheet piles (2) are pulled out.

9. A retaining wall composite slope construction support structure suitable for narrow space as claimed in claim 8, characterized in that: The height H of the retaining wall (13) is not less than the sum of the heights of the two steps (6a).

10. A retaining wall composite slope construction support structure suitable for narrow space as claimed in claim 9, characterized in that: Except for the top surface of the topmost step (6a), earth and stone are backfilled and rolled in the triangular area on the top surface of each step (6a) to form a backfill block (14); the backfill block (14) has an inclined slope (14a); the top end of the slope (14a) is connected to the edge of the top surface of the topmost step (6a), and the bottom end of the slope (14a) is connected to the edge of the top surface of the retaining wall (13).

Images