Cunninghamia lanceolata composite pile and side slope water-collecting well anti-sliding supporting structure

Abstract

The utility model discloses a Chinese fir combined pile and a side slope water-collecting well anti-sliding supporting structure, and relates to the technical field of building side slope supporting, and the Chinese fir combined pile comprises a plurality of Chinese fir piles which are arranged side by side; the multiple anti-bending steel sheets are arranged on the side faces of the Chinese fir piles in a one-to-one correspondence mode; the at least two lining plates are arranged on the opposite sides of the cunninghamia lanceolata pile respectively, one lining plate is connected with the anti-bending steel sheet, and clamping hook sections are arranged on the two sides of each lining plate; and the split bolts penetrate through the Chinese fir piles and are connected with the lining plates and the anti-bending steel sheets correspondingly. The anti-sliding supporting structure for the side slope water collecting well comprises a plurality of Chinese fir piles. The technical problems that an existing steel sheet pile supporting technology is complex, and economic applicability is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of building slope support, in particular to a Chinese fir composite pile and an anti-slide support structure for a slope catch basin. Background Art

[0002] In engineering, when the site is open, slope excavation is a common foundation pit excavation method, but the basement catch basins are mostly distributed at the edge of the foundation pit. When the site is soft soil or silt soil and the catch basin is deep, when excavating at the edge of the foundation pit, the slope is prone to overall sliding failure and local sliding failure.

[0003] In current engineering, steel sheet piles are mostly used for support. Although the above problems can also be solved, the number of on-site catch basins is limited. Using steel sheet piles has high cost, complex technology and poor economic applicability. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a Chinese fir composite pile and an anti-slide support structure for a slope catch basin, which solves the technical problems of complex technology and poor economic applicability of the existing steel sheet pile support technology.

[0005] The embodiment of the present application discloses a Chinese fir composite pile, including:

[0006] Multiple Chinese fir piles, arranged side by side;

[0007] Multiple bending-resistant steel sheets, respectively arranged on the sides of the Chinese fir piles in one-to-one correspondence;

[0008] At least two lining plates, respectively arranged on the opposite sides of the Chinese fir piles, one of the lining plates is connected to the bending-resistant steel sheet, and hook sections are arranged on both sides of the lining plate;

[0009] Through bolts, passing through the Chinese fir piles, and the through bolts are respectively connected to the lining plates and the bending-resistant steel sheets.

[0010] The present application is provided with bending-resistant steel sheets and lining plates, and combined with through bolts, a composite pile with better integrity and stability can be formed.

[0011] On the basis of the above technical solution, the embodiment of the present application can also be improved as follows:

[0012] Further, at least three Chinese fir piles are provided, and the Chinese fir piles are cylindrical, and the bottoms of the Chinese fir piles are conical. The beneficial effect of this step is that the cost of the composite pile can be reduced through multiple Chinese fir piles.

[0013] Furthermore, the length of the Chinese fir wood pile is at least 7m, and the diameter is at least 200mm. The Chinese fir wood pile is provided with tie bolts holes for the tie bolts to pass through at the heights of 0.4m and 4m. The beneficial effect of this step is that the tie bolts holes at specific positions facilitate the subsequent formation of the upper and lower connection structures, thereby ensuring the stability of the composite pile.

[0014] Furthermore, the lining plate is U-shaped, and there are four lining plates. The lining plates are grouped in pairs and are respectively arranged on the opposite sides of the Chinese fir wood pile. The two lining plates on the same side are arranged at intervals up and down. The beneficial effect of this step is to form the upper and lower connection structures, thereby realizing the stability of the composite pile.

[0015] Furthermore, the bending-resistant steel sheet is arc-shaped, and the upper and lower ends of the bending-resistant steel sheet are respectively connected to the two lining plates on the same side of the Chinese fir wood pile. The hook sections are arranged at both ends of the lining plate connected to the bending-resistant steel sheet. The beneficial effect of this step is to improve the bending resistance of the Chinese fir wood pile.

[0016] Furthermore, the length of the lining plate is 1.5m, the width is 0.25m, and the thickness is 0.01m. The beneficial effect of this step is to ensure the strength of the composite pile through the lining plate with specific dimensions.

[0017] Furthermore, the length of the bending-resistant steel sheet is 3.8m, the thickness is 8mm, the central angle is 60 degrees, and the diameter is 0.2m. The beneficial effect of this step is to ensure the bending resistance through the bending-resistant steel sheet with specific dimensions.

[0018] This application also discloses a landslide drainage well anti-sliding support structure, which includes a plurality of Chinese fir composite piles. The hook sections of the adjacent Chinese fir composite piles cooperate with each other, so that a support structure with better integrity can be formed.

[0019] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0020] 1. In this application, the connection of the Chinese fir wood piles can be completed through the tie bolts, thereby ensuring the stability of the entire composite pile structure.

[0021] 2. This application is provided with bending-resistant steel sheets, which resist the active earth pressure together with the Chinese fir wood piles. Due to the anisotropy of the mechanical properties of wood, they are arranged on the tension side of the Chinese fir wood piles to improve the bending resistance of the Chinese fir wood piles.

[0022] 3. The lining plates in this application are U-shaped, which can enhance the integrity of the composite pile. At the same time, the locking mouths at the edges facilitate the lapping between the composite piles, thereby forming a column wall to complete the support structure and improving the bending resistance. Description of the Drawings

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of a Chinese fir composite pile according to a specific embodiment of the present invention;

[0025] Figure 2 For Figure 1 Top view;

[0026] Figure 3 For Figure 1 Structural schematic diagram in the A-A direction of

[0027] Figure 4 Structural schematic diagram of an anti-sliding support structure for a slope catchment well according to a specific embodiment of the present invention;

[0028] Figure 5 For Figure 4 Top view;

[0029] Figure 6 Calculation schematic diagram of an anti-sliding support structure for a slope catchment well according to a specific embodiment of the present invention;

[0030] Figure 7 Schematic diagram for checking the stability of Chinese fir wood piles in an anti-sliding support structure for a slope catchment well according to a specific embodiment of the present invention;

[0031] 1 - Chinese fir wood pile; 2 - Bending-resistant steel sheet; 3 - Lining board; 4 - Tie bolt; 5 - Chinese fir composite pile;

[0032] 101 - Tie bolt hole;

[0033] 301 - Hook section. Specific embodiments

[0034] The following will describe in detail the embodiments of the technical solutions of the present invention in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0035] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0036] In this application, unless otherwise clearly specified and defined, terms such as "installation", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the specification drawings and specific embodiments.

[0038] Embodiment:

[0039] As Figures 1-3 shown, this application discloses a Chinese fir composite pile and a landslide anti-sliding support structure for a slope catchment well, which is used to reduce the cost of the composite pile and can simultaneously achieve the functions of anti-sliding and support.

[0040] This application discloses a Chinese fir composite pile, and its specific structure includes:

[0041] Multiple Chinese fir piles 1, arranged side by side. Preferably, there are three Chinese fir piles, which can reduce the cost while ensuring the quality of the composite pile;

[0042] Multiple bending-resistant steel sheets 2, respectively arranged on the sides of the Chinese fir piles 1, cooperating with the Chinese fir piles to resist the active earth pressure together;

[0043] At least two lining plates 3, respectively arranged on the opposite sides of the Chinese fir piles 1. One of the lining plates 3 is connected to the bending-resistant steel sheet 2, and hook sections 301 are arranged on both sides of the lining plate 3. In this application, the lining plate 3 connects multiple Chinese fir piles 1 to ensure integrity;

[0044] The tie bolts 4 pass through the Chinese fir piles 1, and the tie bolts 4 are respectively connected to the lining plates 3 and the bending-resistant steel sheets 2. In this application, by setting the tie bolts 4, the Chinese fir piles 1, the lining plates 3 and the bending-resistant steel sheets 2 can be connected to form an integral body.

[0045] In one embodiment, there are at least three Chinese fir piles 1, and the Chinese fir piles 1 are cylindrical, and the bottoms of the Chinese fir piles 1 are conical. That is, three Chinese fir piles 1 form a composite pile, or it can also be four or other numbers of multiple Chinese fir piles.

[0046] Specifically, in this application, the length of the Chinese fir piles 1 is at least 7m, the diameter is at least 200mm, and tie bolt holes 101 for the tie bolts to pass through are provided at the heights of 0.4m and 4m of the Chinese fir piles, and the stability of the connection of the tie bolts 4 can be ensured through the specific positions.

[0047] Among them, the lining plate 3 is U-shaped, and there are four lining plates 3. The lining plates 3 are grouped in pairs of two and are respectively arranged on the opposite sides of the Chinese fir piles 1. The two lining plates 3 on the same side are arranged at intervals up and down. That is, the preferred solution of this application is that there are four lining plates 3, and two lining plates are arranged on both sides of the Chinese fir pile 1, and are arranged at intervals up and down, so as to form a fixed position in the upper and lower directions, and are connected and matched with the previous pull bolt holes 101, so as to form a combined pile with better integrity.

[0048] Among them, the bending-resistant steel sheet 2 is arc-shaped, and the upper and lower ends of the bending-resistant steel sheet 2 are respectively connected to the two lining plates 3 on the same side of the Chinese fir pile 1. The hook sections 301 are provided at both ends of the lining plate 3 connected to the bending-resistant steel sheet 2. Combining the above, the bending-resistant steel sheet 2 is connected to the lining plate 3. The specific connection position is that the upper and lower ends of the bending-resistant steel sheet 2 are connected to the lining plate 3, so as to ensure integrity.

[0049] Specifically, the length of the lining plate 3 is 1.5 m, the width is 0.25 m, and the thickness is 0.01 m. The length of the bending-resistant steel sheet 2 is 3.8 m, the thickness is 8 mm, the central angle is 60 degrees, and the diameter is 0.2 m. The strength and stability of the entire combined pile can be further ensured through specific dimensional limitations.

[0050] As Figures 4-5 shown, this application also discloses a landslide prevention and support structure for a slope catchment well, including a plurality of the Chinese fir combined piles 5, and the hook sections 301 of adjacent Chinese fir combined piles 5 cooperate with each other; through this hook section, the lap joint between the combined piles is facilitated, so as to form a column wall, and the bending resistance performance is improved.

[0051] The specific production operation of this application is as follows:

[0052] Step S1: Drill 20-mm holes at 0.4 m and 4 m on the Chinese fir pile body.

[0053] Step S2: Arrange three 7-m Chinese fir piles side by side.

[0054] Step S3: Install the bending-resistant steel sheet on the outside of the Chinese fir pile, pass through the pull anchor bolts, and fix the position of the bending-resistant steel sheet.

[0055] Step S4: Install U-shaped lining plates on both sides, pass through the pull bolts, and tighten with nuts.

[0056] Step S5: Fasten the edges of the U-shaped lining plates with bolts.

[0057] The specific construction of this application is as follows:

[0058] Design calculation

[0059] Calculate the penetration depth of the pile. According to the penetration depth of the steel sheet pile, calculate it as a single-anchor shallow-buried sheet pile, assuming that the upper end is simply supported and the lower end is freely supported. This sheet pile is equivalent to a single-span simply supported beam. The active earth pressure acts behind the pile, and the passive earth pressure acts in front of the pile. The buoyancy effect of the soil below the pressure pit bottom is not considered. The calculation diagram is as shown in Figure 6 shown.

[0060] Bending moment distribution diagram Active earth pressure E a = 0.5e a (H + t)= 0.5γ(H + t) 2 K a

[0061] Passive earth pressure E p = 0.5e p *t = 0.5γ(t)2K p

[0062] e a ———— Maximum pressure of active earth pressure (kPa)

[0063] e p ———————— Maximum pressure of passive earth pressure (kPa)

[0064] K a Coefficient of active earth pressure K a = tan(45 + ψ / 2) 2

[0065] K p Coefficient of passive earth pressure K p = tan(45 - ψ / 2) 2

[0066] Ψ Angle of friction of soil

[0067] H + t is the distance from the 0 point of the active earth pressure considering the cohesion of the soil to the bottom of the foundation pit

[0068] γ —— Unit weight of soil

[0069] To keep the Chinese fir pile stable, the moment at point A is equal to zero, that is, ∑M A = 0, that is

[0070] E a H a -E F H F = 0

[0071] In the stability check of the fir wood piles, in addition to ensuring the stability of the piles themselves, the depth of the piles inserted into the soil should also ensure that there will be no heaving at the bottom of the foundation pit during construction and no overall sliding failure of the slope. The Boussinesq strip method in the Lizheng calculation software can be used to search for the slip surface. Ensure that there is no slip failure surface within the specified range, as Figure 7 shown.

[0072] Construction

[0073] (1) The crane stops at a location about 4m away from the pile driving point and constructs laterally for the convenience of the surveyors to observe. Hang the vibratory hammer, raise it, and straighten the oil pipe and cable.

[0074] (2) Lower the hammer, open the hydraulic port, pull a group of sheet piles under the pile driving hammer, apply lubricating oil to the U-shaped liner lock, and raise the hammer.

[0075] (4) Align the lock of the pile with the positioning pile, lower the hammer, and press the pile to the designed depth by the weight of the hammer and the pile.

[0076] (5) Try driving the pile hammer for about 30 seconds, stop the vibration, use the inertia of the hammer to drive the pile into the solid soil layer, start the vibratory hammer to drive the pile down, control the descending speed of the pile hammer, and keep the pile as vertical as possible so that the locks can be engaged smoothly and the overall deformation resistance can be improved.

[0077] (6) When the sheet pile reaches 40cm before the designed height, stop the vibration, and the vibratory hammer continues to rotate for a certain time due to inertia.

[0078] (7) Generally, before pile driving, a mixture of butter, sawdust, etc. should be applied to the locks to facilitate the lap joint of the locks.

[0079] In the description of the present utility model, a large number of specific details are described. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0080] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. 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 can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. A Chinese fir combined pile, characterized in that: include: Several fir stakes, set side by side; A plurality of bending-resistant steel sheets are arranged one by one on the sides of the fir piles; At least two lining boards are respectively arranged on opposite sides of the fir pile, one of the lining boards is connected to the bending-resistant steel sheet, and hook sections are arranged on both sides of the lining board; The tension bolts pass through the fir piles, and the tension bolts are respectively connected to the lining plate and the bending-resistant steel sheet.

2. The Chinese fir composite pile according to claim 1, characterized in that: There are at least three fir wood piles, and the fir wood piles are cylindrical, and the bottoms of the fir wood piles are conical.

3. The Chinese fir composite pile according to claim 1, characterized in that: The length of the fir pile is at least 7m, and the diameter is at least 200mm. The fir pile is provided with tension bolt holes for the tension bolts to pass through at heights of 0.4m and 4m.

4. The Chinese fir composite pile according to claim 1, characterized in that: The lining board is U-shaped, and there are four lining boards. The lining boards are grouped in pairs and are respectively arranged on opposite sides of the fir piles. The two lining boards on the same side are arranged at intervals in the upper and lower directions.

5. The Chinese fir composite pile according to claim 4, characterized in that: The anti-bending steel sheet is arc-shaped, and the upper and lower ends of the anti-bending steel sheet are respectively connected to two lining plates located on the same side of the fir pile, and the hook sections are arranged at both ends of the lining plates connected to the anti-bending steel sheet.

6. The Chinese fir composite pile according to claim 1, characterized in that: The lining plate has a length of 1.5 m, a width of 0.25 m and a thickness of 0.01 m.

7. The Chinese fir composite pile according to claim 1, characterized in that: The anti-bending steel sheet has a length of 3.8 m, a thickness of 8 mm, a central angle of 60 degrees, and a diameter of 0.2 m.

8. A slope water collection well anti-sliding support structure, characterized in that: The invention comprises a plurality of combined fir wood piles as claimed in any one of claims 1 to 7, wherein the hook sections of adjacent combined fir wood piles are matched with each other.

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