Semi-rock and semi-land-shaped anchor rod type single pile foundation structure and building foundation thereof

Abstract

The invention relates to the technical field of anchoring single pile construction, and discloses a semi-rock and semi-land shaped anchor rod type single pile foundation structure and a building foundation thereof. Each anchoring type pile body is sleeved with a steel protection sleeve, the bottom of the first section of anchoring type pile body is fixedly connected with a drill bit body, the end of the first section of steel protection sleeve is provided with a solid drill bit sleeve, a plurality of open grooves are formed in the anchoring type pile bodies, and the open grooves are communicated with the drill bit body. The semi-rock and semi-land-shaped anchor rod type single pile foundation structure and the building foundation thereof have the advantages that the anchoring type pile body is protected by the steel protection sleeve, the anchoring type pile body can be protected, the anchoring type pile body can be protected, and the anchoring type pile body can be protected; the anchoring type pile body can be effectively protected through the steel protection sleeve, water and air in the stratum can be blocked by the steel protection sleeve, the anchoring type pile body is prevented from being directly eroded by the water and the air, the service life of the anchoring type pile body is prolonged, and the supporting strength of the anchoring type pile body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anchored single pile construction, in particular to a semi-rock and semi-land anchor rod type single pile foundation structure and a building foundation thereof. Background Art

[0002] The anchor-bolt single pile foundation structure is mainly composed of two parts: reinforced concrete piles and anchors. The reinforced concrete piles are the main load-bearing components, responsible for transferring the upper load to the deep soil, while the anchors are fixed in rocks or other stable soil layers to provide additional anchoring force to enhance the stability and bearing capacity of the entire foundation structure. The working principle of the anchor-bolt single pile foundation structure is mainly based on the anchoring effect of the anchor and the bearing effect of the reinforced concrete pile. When the upper load acts on the foundation structure, the reinforced concrete pile transfers the load to the deep soil, while the anchor Through its anchoring effect, part of the load is transferred to the stable soil layer or rock, thereby reducing the lateral deformation and settlement of the pile body. In the specific work process, first use a drill to drill holes according to the marked position. The drilling depth should meet the design requirements. During the drilling process, pay attention to maintaining the verticality and stability of the drill rod to prevent the drilling hole from deflecting. Insert the anchor rod into the drill hole and use grouting materials (such as cement slurry) for grouting. During the grouting process, control the grouting pressure and grouting volume to ensure that the anchor rod is closely combined with the surrounding soil. After the grouting is completed, wait for the grouting material to solidify; In the specific use process, such as the attached Figure 2 As shown in the figure, the reaction frame is fixed on the building foundation platform by bolts, and the position of the pressure platform is adjusted by the electric hoist to limit the position of the single pile, and the single pile is pressed into the hole by the jack. When the length of the single pile is insufficient, a new single pile is added by the lifting equipment, and the connection between the two single piles is welded. The above actions are repeated to press the single pile into the hole, and finally grouting is performed in the single pile, so that the single pile is fixed in the soil. However, there are always capillary channels in the grouting layer wrapping the anchored single pile, and the working conditions of the anchored single pile are relatively poor, especially for the anchored single pile deep in the semi-rock and semi-soil terrain. In this environment, the grouting body wrapped around the anchored single pile is also easily affected by the rock stratum dislocation deformation stress and cracks as the service life increases, so that water and air can easily penetrate the grouting layer to cause erosion to the anchored single pile (such as the attached Figure 1 As shown in the figure), the service life and supporting strength of the anchored single pile will be affected. Therefore, we propose a semi-rock and semi-land anchored single pile foundation structure and its building foundation. Summary of the invention

[0003] The object of the present invention is to provide a semi-rock and semi-land anchor-type single pile foundation structure and a building foundation thereof, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anchored single pile foundation structure in a semi-rock and semi-land terrain, comprising an anchored pile body and a hole for being implanted in the semi-rock and semi-land terrain, wherein a plurality of the anchored pile bodies are fixedly connected by welding; each of the anchored pile bodies is sleeved with a steel protective sleeve, and the steel protective sleeve is used to protect the anchored pile body, a drill body is fixedly connected to the bottom of the first section of the anchored pile body, a solid drill sleeve is installed at the end of the first section of the steel protective sleeve, a plurality of grooves are opened inside the anchored pile body, a plurality of slurry outlets connected to the hole are opened on the steel protective sleeve, and a plurality of shielding parts for protecting the slurry outlets are installed on the outer wall of the steel protective sleeve, slurry is injected into the anchored pile body, the slurry spreads through the grooves to the slurry outlet and finally fills the hole, so that the anchored pile body is fixed in the semi-rock and semi-land terrain, and the steel protective sleeve protects the anchored pile body.

[0005] Preferably, the adjacent ends of the plurality of steel protective sleeves are connected by welding, and each two adjacent steel protective sleeves are fixedly connected by a plurality of high-strength bolts, and the plurality of high-strength bolts all penetrate the anchoring pile body, and the plurality of high-strength bolts are distributed in an alternating manner between each two adjacent steel protective sleeves.

[0006] Preferably, a steel cage is installed inside each of the steel protective casings, and a load-bearing layer is fixedly installed at the bottom of the steel protective casing, and the bottom of the steel cage is welded to the load-bearing layer.

[0007] Preferably, exhaust ducts are provided between the load-bearing layer at the bottom of the steel protective sleeve and the top of the adjacent steel protective sleeve, and the exhaust ducts are in a communicating state.

[0008] Preferably, the aperture of the slot is larger than the aperture of the pulp outlet.

[0009] Preferably, the outer diameter of the shielding portion is smaller than the aperture of the hole.

[0010] Preferably, the cross section of the shielding portion is L-shaped, and the shielding portion is made of high-strength steel material.

[0011] Preferably, the cross section of the shielding portion is L-shaped, wherein the shielding portion is made of alloy steel material, and a spherical protrusion is fixedly installed on the shielding portion in addition to the slurry outlet protection area.

[0012] Preferably, the thickness of the grouting body formed between the steel protective sleeve and the hole is ≥25 mm.

[0013] A building foundation of a semi-rock and semi-land anchor-type single pile foundation structure, comprising a foundation platform, and a plurality of anchor bodies are fixedly installed on the foundation platform, a steel ring is arranged above the foundation platform, wherein the steel ring and the anchor body are connected by a steel cable, the inner diameter of the steel ring is greater than the outer diameter of a steel protective casing, and the center line of the steel ring coincides with the axis of the steel protective casing.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes a steel protective sleeve to protect the anchored pile body, and reinforces adjacent steel protective sleeves by high-strength bolts. Therefore, when working in a stratum with relatively harsh working conditions, the steel protective sleeve can effectively reduce the risk of cracks or breaks under the fixing action of welding and high-strength bolts, and effectively improve the supporting strength. The anchored pile body can be effectively protected by the steel protective sleeve, and water and air in the stratum can be blocked by the steel protective sleeve to prevent water and air from directly corroding the anchored pile body, thereby improving the service life and supporting strength of the anchored pile body. The present invention uses a steel ring that coincides with the axis of the hole to limit the anchored single pile, so as to ensure that the node positions of the upper and lower sections of the anchored single pile are not prone to a large degree of misalignment.

[0015] The present invention can effectively protect the slurry outlet through the shielding part, avoid the slurry outlet from being blocked by the soil environment with relatively harsh geographical conditions, and then the slurry spreads into the slurry outlet through the grooves and finally fills the hole, and the anchored pile body is protected by the steel protective casing, thereby improving the service life and supporting strength of the anchored pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the anchored pile body of the present invention being invaded by water vapor; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the structure of the anchor pile body of the present invention in the stratum; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of the area at center A; Figure 5 It is a schematic diagram of the structure of the anchored pile body and the steel protective casing of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure of the area B in the middle; Figure 7 This is a schematic diagram of the shielding part structure of the present invention; Figure 8 It is a schematic diagram of the shielding portion and the spherical bump structure of the present invention; Fig. 9 It is a schematic diagram of the structure of the anchor rod body and the steel ring of the present invention; Fig.10 This is a schematic diagram of the structure of the solid drill sleeve and the steel protective casing of the present invention; Fig.11 It is a schematic diagram of the separation of the steel protective casing structure of the present invention.

[0017] In the figure: 1. anchored pile body; 101. slot; 2. hole; 3. steel protective casing; 31. solid drill sleeve; 32. slurry outlet; 33. steel cage; 34. load-bearing layer; 35. exhaust duct; 4. drill body; 5. shielding part; 51. spherical bump; 6. high-strength bolt; 7. foundation platform; 71. anchor body; 72. steel ring; 73. steel cable; 8. reaction frame; 81. electric hoist; 82. pressure table; 83. jack. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-11 The present invention provides a technical solution: a semi-rock and semi-land anchor-type single pile foundation structure and a building foundation thereof. The present invention makes corresponding improvements to the problems in the above-mentioned background technology, including a foundation platform 7, wherein the foundation platform 7 is cast by slurry, and a plurality of anchor bodies 71 are fixedly installed on the foundation platform 7, and a geological drill is used on the foundation platform 7 to drill holes in the foundation platform 7 and the semi-rock and semi-land terrain to form a hole 2, and then a steel ring 72 is arranged above the foundation platform 7, wherein the steel ring 72 is connected to the anchor body 71 by a steel cable 73, the inner diameter of the steel ring 72 is greater than the outer diameter of the steel protective casing 3, and the center line of the steel ring 72 coincides with the axis of the steel protective casing 3; Further explanation, the present invention also provides a semi-rock and semi-land anchor-type single pile foundation structure, including an anchored pile body 1, and multiple anchored pile bodies 1 are fixedly connected by welding. It should be noted that in some cases, they can also be fixed by bolting. During the welding process, it is ensured that there are no defects such as cold welding and cracks at the welding points; each anchored pile body 1 is sleeved with a steel protective sleeve 3, and the steel protective sleeve 3 is used to protect the anchored pile body 1. The bottom of the first section of the anchored pile body 1 is fixedly connected with a drill body 4, and a solid drill sleeve 31 is installed at the end of the first section of the steel protective sleeve 3, and a load-bearing layer 34 is fixedly installed at the bottom of each steel protective sleeve 3 (the steel protective sleeve 3 is in a vertical downward state during the process of implanting the anchored pile body 1 into the hole 2), and a plurality of slots 101 are opened inside the anchored pile body 1, and a plurality of slurry outlets 32 connected to the hole 2 are opened on the steel protective sleeve 3; Combined with Figure 2 As shown, firstly, a geological drill is used on the foundation platform 7 to drill holes in the foundation platform 7 and the semi-rock and semi-soil terrain, and then the area near the drilled hole 2 is cleaned accordingly, and a steel chisel is used to detect whether there is an obstacle one meter away from the hole 2. After the processing is completed, a plurality of anchor rod bodies 71 are fixedly installed on the foundation platform 7, and a reaction frame 8 is placed on the foundation platform 7 by means of a crane or other equipment, and the reaction frame 8 is fixed by means of a plurality of anchor rod bodies 71, and then an electric hoist 81, a pressing platform 82 and a jack 83 are installed on the reaction frame 8, wherein the jack 83 is placed between the pressing platform 82 and the anchored pile body 1, and a 3cm-4cm wooden board can be placed on the top of the anchored pile body 1 and a steel pile cap can be set to protect the top of the anchored pile body, and then the reaction force of the jack 83 The anchored pile body 1 (including the steel protective casing 3 and the solid drill sleeve 31 welded on the anchored pile body 1) is pressed. When the anchored single pile needs to be extended, the intersection of the two anchored single piles needs to be welded. During the welding process, it is necessary to ensure that the anchored single pile remains straight and there is no large degree of misalignment. Under normal circumstances, the misalignment of the upper and lower sections when connecting the piles should not be greater than 2mm. In the process of anchoring the single pile below, in order to ensure that there is no large degree of misalignment between the pile bodies, the steel ring 72 that coincides with the axis of the hole 2 will limit the anchored single pile. Then the staff will fine-tune the anchored single pile under the action of the crane equipment to ensure that the node positions of the upper and lower sections of the anchored single pile are not prone to large degree of misalignment.

[0020] When installing the steel protective casing 3 on the surface of the anchored single pile (the first section of the anchored pile body 1 has a drill body 4, and a solid drill sleeve 31 needs to be installed), firstly weld the solid drill sleeve 31 to the drill body 4 of the first section of the anchored single pile, and then place the steel protective casing 3 flat on the ground. In order to cope with the harsh conditions of the semi-rock and semi-soil terrain, a steel cage 33 can be placed inside the steel protective casing 3. During the placement of the steel cage 33, a corresponding steel plate frame can be installed inside the steel protective casing 3 to limit the top of the steel cage 33. After the steel cage 33 is completely inserted into the steel protective casing 3, The bearing layer 34 is welded to the bottom of the protective sleeve 3, and the bottom of the steel cage 33 is in contact with the surface of the bearing layer 34. At this time, since the steel protective sleeve 3 has not been welded to the anchored monopile, the inside of the steel protective sleeve 3 can still be seen after the bearing layer 34 is welded. Then, the steel cage 33 is welded to the bearing layer 34 and the steel protective sleeve 3 by welding. After the welding is completed, the anchored monopile is placed in the steel protective sleeve 3 by hoisting equipment such as a crane, and then the steel protective sleeve 3 is welded to the anchored monopile, and then the solid drill sleeve 31 is welded to the steel protective sleeve 3. When pressed into the semi-rock and semi-land terrain, the soil in the stratum will exert a force on the steel protective casing 3. In order to avoid cracks at the node welding of two adjacent steel protective casings 3, the present invention reinforces the upper and lower nodes, and each two adjacent steel protective casings 3 are fixedly connected by multiple high-strength bolts 6. The multiple high-strength bolts 6 all penetrate the anchor pile body 1, and the multiple high-strength bolts 6 are staggered between each two adjacent steel protective casings 3. Figure 3 and attached Figure 4 As shown, under the fixing effect of the original welding, there is a certain fixing strength between the steel protective sleeves 3, and then the two steel protective sleeves 3 are reinforced by using multiple high-strength bolts 6. Furthermore, when working in a stratum with relatively harsh working conditions, the steel protective sleeves 3 can effectively reduce the risk of cracks or breakages under the fixing effect of welding and high-strength bolts 6, and effectively improve the supporting strength.

[0021] During the grouting process, the grouting speed and pressure need to be strictly controlled. Too fast grouting speed or too high pressure may cause pile body rupture or soil disturbance, while too slow grouting speed or too low pressure may affect the grouting effect. In order to effectively avoid the influence of the steel protective sleeve 3 on the grouting work, the present invention is provided with exhaust ducts 35 between the load-bearing layer 34 at the bottom of the steel protective sleeve 3 and the top of the steel protective sleeve 3 adjacent thereto, and the exhaust ducts 35 are in a connected state, and the shape of the groove 101 is designed. The groove 101 is square in shape, and the aperture of the groove 101 is larger than the aperture of the slurry outlet 32. Then, during the grouting process, the slurry spreads through the groove 101 to the slurry outlet 32 ​​and finally fills the hole 2, so that the anchored pile body 1 is fixed in the semi-rock and semi-soil terrain, and the steel protective sleeve 3 is used to protect the anchored pile body 1; In actual application, the geographical conditions of the semi-rock and semi-land terrain are relatively harsh, especially the soil conditions, which can be specifically divided into sandy soil, clay soil, loamy soil, silty soil, etc. Among them, soft soil is more common and has a loose texture. When the anchored single pile penetrates into the stratum, the soil in the hole 2 will squeeze the slurry outlet 32 ​​due to the influence of stratum pressure or other factors. In order to avoid the slurry outlet 32 ​​being blocked by the soil, the attached Figure 7 and attached Figure 8 As shown, the present invention has a plurality of shielding parts 5 installed on the outer wall of the steel protective sleeve 3 for protecting the slurry outlet 32. In a relatively soft soil layer (such as loamy soil), the shielding part 5 in the present invention has an L-shaped cross-section, wherein the shielding part 5 is made of alloy steel material (with a certain ductility), and in addition to the shielding part 5 protecting the slurry outlet 32, a spherical protrusion 51 is fixedly installed. When the relatively soft soil layer is pressed toward the steel protective sleeve 3, the shielding part 5 first contacts with the soil, and the shielding part 5 is bent by the force. If the bending degree is large, the spherical protrusion 51 will first contact with the surface of the steel protective sleeve 3, but Since there is no spherical protrusion 51 at the slurry outlet 32, there will be a certain space at the slurry outlet 32 ​​to facilitate the outflow of slurry, which can effectively prevent the soft soil from clogging the slurry outlet 32; or in a silt layer, silt is likely to fall due to the pressure of the soil layer. In order to prevent the slurry outlet 32 ​​from being blocked by the falling silt, the above-mentioned shielding portion 5 made of alloy steel material can be used for protection, or the shielding portion 5 made of high-strength steel material can be used for protection. The high-strength steel material can effectively protect the slurry outlet 32 ​​during the silt falling process, so as to prevent the slurry outlet 32 ​​from being blocked by the adhesive properties of the silt.

[0022] During the grouting process, the slurry enters the anchor pile body 1, and when it rises to the slot 101, it will enter the steel protective casing 3 along the slot 101, that is, the steel protective casing 3 is filled with slurry, so that the steel cage 33 is cast and formed, and the slurry in the steel protective casing 3 flows into the hole 2 through the slurry outlet 32. During the grouting process, a pressure gauge needs to be set to monitor the grouting pressure (the grouting pressure is usually 0.3-0.6MPa) in real time. After the grouting is completed, when the anchor pile is After the slurry is turned over at the pipe mouth of the body 1, the area near the foundation platform 7 is cleaned. It should be noted that the thickness of the grouting body formed between the steel protective casing 3 and the hole 2 is ≥25mm; and further, through the structural design of the present invention, the anchored pile body 1 can be effectively protected, and the water and air in the stratum can be blocked by the steel protective casing 3 to prevent the water and air from directly corroding the anchored pile body 1. The anchored pile body 1 can be coated with an anti-corrosion coating before being pressed in to improve the protective strength of the anchored pile body 1.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A semi-rock and semi-land anchor-type single pile foundation structure, characterized in that: The invention comprises an anchoring pile body (1) and a hole (2) for being implanted in a semi-rock and semi-soil terrain, wherein a plurality of the anchoring pile bodies (1) are fixedly connected by welding; each of the anchoring pile bodies (1) is sleeved with a steel protective sleeve (3), and the steel protective sleeve (3) is used to protect the anchoring pile body (1); a drill body (4) is fixedly connected to the bottom of the first section of the anchoring pile body (1), a solid drill sleeve (31) is installed at the end of the first section of the steel protective sleeve (3), and a plurality of slots ( 101), and the steel protective sleeve (3) is provided with a plurality of slurry outlets (32) connected to the hole (2), and a plurality of shielding parts (5) for protecting the slurry outlets (32) are installed on the outer wall of the steel protective sleeve (3). Slurry is injected into the anchored pile body (1), and the slurry spreads through the grooves (101) to the slurry outlets (32) and finally fills the hole (2), so that the anchored pile body (1) is fixed in the semi-rock and semi-earth terrain, and the steel protective sleeve (3) protects the anchored pile body (1).

2. The anchor-type single pile foundation structure in a semi-rock and semi-land terrain according to claim 1 is characterized by: The adjacent ends of the plurality of steel protective sleeves (3) are connected by welding, and each two adjacent steel protective sleeves (3) are also fixedly connected by a plurality of high-strength bolts (6), and the plurality of high-strength bolts (6) all penetrate the anchoring pile body (1), and the plurality of high-strength bolts (6) are distributed in a staggered manner between each two adjacent steel protective sleeves (3).

3. The anchor-type single pile foundation structure in a semi-rock and semi-land terrain according to claim 2 is characterized by: A steel cage (33) is installed inside each of the steel protective sleeves (3), and a load-bearing layer (34) is fixedly installed at the bottom of the steel protective sleeve (3), and the bottom of the steel cage (33) is welded to the load-bearing layer (34).

4. The anchor-type single pile foundation structure in a semi-rock and semi-land terrain according to claim 3 is characterized by: An exhaust duct (35) is provided between the load-bearing layer (34) at the bottom of the steel protective sleeve (3) and the top of the adjacent steel protective sleeve (3), and the exhaust ducts (35) are in a communicating state.

5. The anchor-type single pile foundation structure in a semi-rock and semi-land terrain according to claim 1 is characterized by: The aperture of the slot (101) is larger than the aperture of the pulp outlet (32).

6. The anchor-type single pile foundation structure in a semi-rock and semi-land terrain according to claim 1 is characterized by: The outer diameter of the shielding portion (5) is smaller than the aperture of the hole (2).

7. The anchor-type single pile foundation structure in a semi-rock and semi-land terrain according to claim 1 is characterized by: The cross section of the shielding portion (5) is arranged in an L-shape, and the shielding portion (5) is made of a high-strength steel material.

8. The anchor-type single pile foundation structure in a semi-rock and semi-land terrain according to claim 1 is characterized by: The shielding portion (5) has an L-shaped cross section, wherein the shielding portion (5) is made of alloy steel material, and a spherical protrusion (51) is fixedly mounted on the shielding portion (5) in addition to the protection area for the slurry outlet (32).

9. The anchor-rod type single pile foundation structure in a semi-rock and semi-land terrain according to claim 1, characterized in that: The thickness of the grouting body formed between the steel protective sleeve (3) and the hole (2) is ≥25 mm.

10. A building foundation of a semi-rock and semi-land anchor-type single pile foundation structure, comprising a foundation platform (7), and a plurality of anchor bodies (71) are fixedly mounted on the foundation platform (7), characterized in that: A steel ring (72) is arranged above the base platform (7), wherein the steel ring (72) is connected to the anchor rod body (71) via a steel cable (73), the inner diameter of the steel ring (72) is greater than the outer diameter of the steel protective sleeve (3), and the center line of the steel ring (72) coincides with the axis of the steel protective sleeve (3).

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