Soft soil trestle road foundation structure

Abstract

The utility model provides a soft soil plank road foundation structure which comprises a timber pile assembly, a foundation assembly and a foundation assembly. The bottom of the timber pile assembly is located in a soft soil layer. The mattress layer is arranged above the timber pile assembly, and the top of the timber pile assembly is wrapped in the mattress layer; the concrete cushion layer is positioned above the mattress layer; and the stone pile layer is located above the concrete cushion layer. The timber pile assembly is arranged in soft soil, the timber pile assembly replaces low-strength soft soil with the same size as a pile body, and when the timber pile assembly is subjected to external loads, stress in a foundation is redistributed according to the pile-soil stress ratio; stress is concentrated on the timber pile assembly, stress borne by soil around the pile body is correspondingly reduced, and most loads are borne by the timber pile assembly. The strength and the deformation resistance of the piles are superior to those of a soil body, so that the bearing capacity and the coefficient of the formed composite foundation are superior to those of the original soil body, and the effects of reducing deformation and improving the bearing capacity can be achieved.

Description

Technical Field

[0001] The present application relates to a foundation structure, and in particular to a soft soil plank road foundation structure. Background Art

[0002] The foundation refers to the part of the soil that bears the influence of the superstructure load. It is used to bear the entire load of the building or the vehicles traveling on the road. The foundation is not an integral part of the building or the road, but it plays a very important role in ensuring the durability of the building and the road. The foundation is divided into natural foundation and artificial foundation. The natural foundation can meet all the load requirements of the foundation in its natural state. The artificial foundation is under poor site conditions. In order to make the foundation have sufficient bearing capacity, artificial reinforcement of the foundation is required.

[0003] For plank road foundation, as its external load is small, the expanded foundation type is often used. However, in the deep soft soil area, there are a lot of soft soils with high water content, high porosity, high compressibility and low shear strength.

[0004] In this area, foundation treatment is required to meet the foundation bearing capacity requirements. The foundation treatment technology in soft soil areas mainly includes grouting reinforcement technology and soft soil foundation treatment;

[0005] Common soft soil foundation treatment methods include riprap and silt removal, gravel replacement, and CFG pile reinforcement. However, these commonly used treatment methods have a significant impact on the surrounding environment, are difficult to construct, require significant investment in machinery and manpower, and result in high reinforcement costs. Utility Model Content

[0006] The present application provides a soft soil plank road foundation structure to solve the problems existing in the related technologies. The technical solution is as follows:

[0007] The present application provides a soft soil plank road foundation structure, comprising:

[0008] a wood pile assembly, wherein the bottom of the wood pile assembly is located in the soft soil layer;

[0009] A mattress layer is provided above the wood pile assembly, and the top of the wood pile assembly is wrapped in the mattress layer;

[0010] Concrete pad, the concrete pad is located above the cushion layer.

[0011] In one embodiment,

[0012] The stake kit includes:

[0013] Several piles, the bottoms of which are all located in the soft soil layer, and the tops of which are all located in the cushion layer;

[0014] A plurality of socket connectors, wherein the plurality of socket connectors are fixed on the pile body;

[0015] Connectors, which run through the tops of several piles.

[0016] In one embodiment,

[0017] The bottoms of several piles are provided with conical heads.

[0018] In one embodiment,

[0019] The socket is an inverted frustum structure, and has a through hole adapted to the pile body, a side of the socket is hollowed out, and a support plate is provided on the socket, which is located in the hollow on the side of the socket.

[0020] In one embodiment,

[0021] The pile is made of pine wood, 8m long and 15cm in diameter.

[0022] In one embodiment,

[0023] The cushion layer is a crushed stone filling layer with a thickness of 500 mm, and the thickness between the surface of the cushion layer and the top of the pile body is 50 mm.

[0024] In one embodiment,

[0025] The thickness of the concrete cushion is 100mm.

[0026] In one embodiment,

[0027] The longitudinal or transverse spacing between several piles is 0.3m.

[0028] In one embodiment,

[0029] The connecting pieces are arranged in a grid shape.

[0030] In one embodiment,

[0031] A hole for the connecting piece to pass through is provided at a distance of 0.4m to 0.6m from the top of the pile body.

[0032] The advantages or beneficial effects of the above technical solution include at least:

[0033] By setting the wooden pile assembly in soft soil, the wooden pile assembly replaces the low-strength soft soil with the same volume as the pile body. When subjected to external loads, the stress in the foundation is redistributed according to the pile-soil stress ratio; the stress is concentrated on the wooden pile assembly, and the stress on the soil around the pile body is correspondingly reduced, and most of the load is borne by the wooden pile assembly; because the strength and deformation resistance of the pile are better than those of the soil, the bearing capacity and coefficient of the composite foundation formed are also better than the original soil, which can achieve the effect of reducing deformation and increasing bearing capacity, while reducing the difficulty of construction, reducing the impact on the surrounding environment and reducing costs.

[0034] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0036] Figure 1 It is a structural diagram of the utility model;

[0037] Figure 2 for Figure 1 A schematic diagram of the structure of the middle socket;

[0038] In the picture:

[0039] 100. Foundation structure;

[0040] 110. Wood pile assembly; 111. Pile body; 112. Socket; 113. Connector; 114. Conical head; 115. Support plate;

[0041] 120, mattress layer;

[0042] 130. Concrete cushion;

[0043] 140. Stone pile layer. DETAILED DESCRIPTION

[0044] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0045] Figure 1-Figure 2FIG. 1 shows a structural diagram of a soft soil plank road foundation structure 100 according to an embodiment of the present application. Figure 1-Figure 2 As shown, the foundation structure 100 may include:

[0046] The embodiment of the present application provides a soft soil plank road foundation structure 100, comprising:

[0047] A wood pile assembly 110, wherein the bottom of the wood pile assembly 110 is located in the soft soil layer;

[0048] A mattress layer 120 is provided above the pile assembly 110 , and the top of the pile assembly 110 is wrapped in the mattress layer 120 ;

[0049] A concrete cushion layer 130 , the concrete cushion layer 130 is located above the mattress layer 120 ;

[0050] The rock pile layer 140 is located above the concrete cushion layer 130 .

[0051] In this embodiment, wooden pile assemblies 110 are driven into the soft soil layer at a spacing of 0.3 m. After the pile driving is completed, the wooden pile assemblies 110 are connected longitudinally and transversely. After the pile driving is completed, the top of the pile is manually excavated and replaced with a cushion layer 120. Finally, a concrete cushion layer 130 is placed on the cushion layer 120. After the concrete cushion layer 130 is air-dried, stones are stacked to form a stone pile layer 140, and the plank road is paved.

[0052] Furthermore, the mattress layer 120 is a gravel filling layer, the mattress layer 120 is 500 mm thick, and the thickness between the surface of the mattress layer 120 and the top of the pile body 111 is 50 mm;

[0053] Furthermore, the thickness of the concrete cushion layer 130 is 100 mm;

[0054] By setting the wooden pile assembly 110 in the soft soil, the wooden pile assembly 110 replaces the low-strength soft soil of the same volume as the pile body 111. When subjected to external loads, the stress in the foundation is redistributed according to the pile-soil stress ratio; the stress is concentrated on the wooden pile assembly 110, and the stress on the soil around the pile body is correspondingly reduced, and most of the load is borne by the wooden pile assembly 110; because the strength and deformation resistance of the pile are better than those of the soil, the bearing capacity and coefficient of the composite foundation formed are also better than the original soil, which can achieve the effect of reducing deformation and increasing bearing capacity, while reducing the difficulty of construction, reducing the impact on the surrounding environment and reducing costs.

[0055] like Figure 1-Figure 2 As shown, in one embodiment,

[0056] The stake assembly 110 includes:

[0057] A plurality of pile bodies 111, wherein the bottoms of the pile bodies 111 are all located in the soft soil layer, and the tops of the pile bodies 111 are all located in the cushion layer 120;

[0058] A plurality of sleeve connectors 112 , wherein the plurality of sleeve connectors 112 are fixed on the pile body 111 ;

[0059] The connecting piece 113 passes through the tops of the plurality of piles 111 .

[0060] In this embodiment, the sleeve 112 is sleeved on the pile body 111 and fixed by screws or glue. The sleeve 112 is set every 0.5m.

[0061] During the construction process, several piles 111 are driven into the soft soil layer in sequence. The piling process is as follows: piles are placed → piles are straightened according to the designed pile spacing → piles are pressed into the soil mechanically → pressing is stopped once the pile tops reach the designed elevation → pile tops are manually excavated and replaced with a crushed stone cushion layer 120;

[0062] Furthermore, the pile body 111 is made of pine wood, is 8 meters long, has a diameter of 15 centimeters, and the horizontal and vertical intervals between adjacent pile bodies 111 are both 0.3 meters.

[0063] After the pile body 111 is driven, the connector 113 is inserted into the pile body 111 through the hole at the top of the pile body 111 to connect the pile bodies 111, thereby ensuring the stability and balance of the top of the pile body 111.

[0064] Furthermore, the connectors 113 are arranged in a grid pattern on the top of the pile body 111. The holes on the pile body 111 for the connectors 113 to pass through are located 0.4m to 0.6m below the top of the pile body 111, thereby ensuring that more horizontal and vertical connectors 113 can be arranged. The top view structure of the connectors 113 is in a grid pattern.

[0065] Furthermore, the connecting member 113 is a steel bar.

[0066] like Figure 1-Figure 2 As shown, in one embodiment,

[0067] The bottoms of the piles 111 are each provided with a conical head 114 .

[0068] In this embodiment, by providing a conical head 114 at the bottom of the pile body 111, it is easy for the pile body 111 to enter the soft soil layer, thereby reducing the resistance during pile driving.

[0069] like Figure 1-Figure 2 As shown, in one embodiment,

[0070] The socket 112 is an inverted frustum structure, and has a through hole adapted to the pile body 111 . The side of the socket 112 is hollowed out. A support plate 115 is also provided on the socket 112 , and the support plate 115 is located in the hollow on the side of the socket 112 .

[0071] In this embodiment, the sleeve 112 is an inverted frustum structure, which facilitates the driving of the pile body 111 into soft soil. The sleeve 112 is provided with a through hole adapted to the pile body 111. The side of the sleeve 112 is hollowed out, so that the cross-section of the sleeve 112 is an "I"-shaped structure. A support plate 115 is disposed in the hollow of the sleeve 112. A plurality of support plates 115 are provided to maintain the stability of the sleeve 112.

[0072] By arranging the sleeve 112 on the pile body 111, on the one hand, the stability of the pile body 111 when it is driven into the soft soil is ensured, and the soft soil is squeezed by the sleeve 112. When the pile body 111 is constructed, it is driven into the pile by hammering, and the original soil at the pile hole position is forced to be squeezed laterally, so that the density of the soil layer within a certain range around the pile is improved, thereby improving the bearing capacity of the soil between the piles;

[0073] On the other hand, by configuring the sleeve 112 as an inverted truncated cone structure and providing a hollow and support plate 115 on the side of the sleeve 112, the inverted truncated cone increases the area above the cone. When the pile body 111 is driven into the soft soil layer, the soil enters the support plate 115 and the hollow, thereby increasing the contact between the pile body 111 and the soft soil layer, ensuring the vertical stability of the pile body 111 and preventing the pile body 111 from deflecting. The inverted truncated cone structure of the sleeve 112 can also further reduce the pressure of the pile body 111 entering the soft soil layer.

[0074] Furthermore, the diameter of the narrowest part of the sleeve 112 is greater than 15 cm, thereby ensuring that the sleeve 112 can be sleeved on the wooden stake;

[0075] The diameter of the widest part of the sleeve 112 is less than 30 cm, thereby ensuring that each pile body 111 will not be blocked when the interval is 0.3 m, causing the pile body 111 to be unable to be driven into the soft soil layer or affecting the previously driven pile body 111.

[0076] The functions of the modules in the devices of the embodiments of the present invention can be found in the corresponding descriptions of the above methods, which will not be repeated here.

[0077] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A soft soil plank road foundation structure, characterized in that: include: a wood pile assembly, wherein the bottom of the wood pile assembly is located in a soft soil layer; A mattress layer, the mattress layer is arranged above the wooden pile assembly, and the top of the wooden pile assembly is wrapped in the mattress layer; A concrete cushion layer is located above the mattress layer.

2. The soft soil plank road foundation structure according to claim 1, characterized in that: The pile assembly comprises: a plurality of pile bodies, wherein the bottoms of the plurality of pile bodies are all located in the soft soil layer, and the tops of the plurality of pile bodies are all located in the cushion layer; A plurality of sleeve connectors, wherein the plurality of sleeve connectors are fixed on the pile body; A connecting piece is provided, wherein the connecting piece passes through the tops of the plurality of pile bodies.

3. The soft soil plank road foundation structure according to claim 2, characterized in that: The bottoms of the plurality of pile bodies are all provided with conical heads.

4. The soft soil plank road foundation structure according to claim 2, characterized in that: The socket is an inverted truncated cone structure, and has a through hole adapted to the pile body. The side of the socket is hollowed out. A support plate is also provided on the socket, and the support plate is located in the hollow on the side of the socket.

5. The soft soil plank road foundation structure according to claim 2, characterized in that: The pile body is made of pine wood, and has a length of 8m and a diameter of 15cm.

6. The soft soil plank road foundation structure according to claim 5, characterized in that: The cushion layer is a gravel filling layer, the cushion layer is 500 mm thick, and the thickness between the surface of the cushion layer and the top of the pile body is 50 mm.

7. The soft soil plank road foundation structure according to claim 1, characterized in that: The thickness of the concrete cushion layer is 100 mm.

8. The soft soil plank road foundation structure according to claim 2, characterized in that: The longitudinal or transverse spacing between the plurality of piles is 0.3m.

9. The soft soil plank road foundation structure according to claim 2, characterized in that: The connecting pieces are arranged in a grid shape.

10. The soft soil plank road foundation structure according to claim 9, characterized in that: A hole for the connecting piece to pass through is provided at a distance of 0.4m to 0.6m from the top of the pile body.

Images