House foundation reinforcing structure in heterogeneous stratum

Abstract

The utility model discloses a house foundation reinforcing structure in a heterogeneous stratum, which comprises a bearing platform, a pile foundation, a plurality of bearing columns and a pile head waterproof structure, and the bearing platform comprises a raft foundation section bearing platform and a pile foundation section bearing platform; the raft foundation section bearing platform comprises a main body section and an extension section; the pile foundation section bearing platform comprises an upper bearing platform and a lower bearing platform which are positioned on the upper side and the lower side of the extension section; the plurality of bearing columns are arranged on the upper surface of the upper bearing platform; the pile foundation comprises a shallow pile and a deep pile, and the shallow pile is located between the deep pile and the main body section. The pile head waterproof structure comprises a cushion layer, a waterproof roll layer, a first waterproof layer and anchoring steel bars, and the cushion layer is provided with a groove; a second waterproof layer is further arranged above the head of the pile foundation, extends out of the edge of the head of the pile foundation and is connected with the first waterproof layer. According to the utility model, the weight distribution of the foundation is adjusted, the unbalanced effect when the bearing platform is subjected to lateral force is reduced, and the overall stability of the bearing platform is enhanced by adjusting the layout of the pile foundation. The grooves are formed in the cushion layer, so that the waterproof roll layer is not prone to being separated from the side wall of the pile head, sealing is further enhanced through the first waterproof layer and the second waterproof layer, and water permeation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of building foundations, in particular to a house foundation reinforcement structure in heterogeneous strata. Background Art

[0002] The foundation cap of a factory usually uses an inclined plane to increase the area of the pressure surface and the bearing capacity, so as to make the building more stable and safer. Since the factory needs to load and unload goods frequently, loading and unloading platforms are generally built during the construction of a new factory to facilitate the loading and unloading operations of large loading and unloading trucks and freight trucks. However, due to the height difference of the loading and unloading platform and the characteristics of heterogeneous soil layers, the settlement of the part of the loading and unloading platform located in the unloading area and the part of the factory building is uneven. After being affected by the settlement, the inclined plane of the foundation cap is likely to damage the waterproof structure between the pile head and the foundation cap, causing water penetration and making the bottom of the building damp or even leak, which will further affect the normal use of the equipment installed below the ground in the factory. Content of the Utility Model

[0003] The utility model provides a house foundation reinforcement structure in heterogeneous strata to solve the above technical problems.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A house foundation reinforcement structure in heterogeneous strata includes a foundation cap, a pile foundation and a number of load-bearing columns. The foundation cap includes a raft foundation section foundation cap and a pile foundation section foundation cap; the raft foundation section foundation cap includes a main section and an extension section extending from the side wall of the main section. The pile foundation section foundation cap includes an upper foundation cap and a lower foundation cap located on the upper and lower sides of the extension section; the side wall of the main section abuts against the side wall of the lower foundation cap, the upper surface of the main section is higher than the upper surface of the lower foundation cap, and the extension section covers the upper surface of the lower foundation cap; the upper surface of the upper foundation cap is flush with the upper surface of the main section, the upper foundation cap abuts against the side wall of the main section, and the distance between the end of the upper foundation cap far from the main section and the main section is less than the distance between the end of the lower foundation cap far from the main section and the main section;

[0006] A number of load-bearing columns are arranged on the upper surface of the upper foundation cap to support the house;

[0007] The pile foundation includes shallow piles and deep piles. The shallow piles and deep piles support the lower foundation cap, and the shallow piles are located between the deep piles and the main section.

[0008] The pile head waterproof structure includes: a cushion layer, a waterproof coiled material layer, a first waterproof layer, and anchor bars. The cushion layer is provided with a groove, the groove is arranged around the head of the pile foundation, and both side walls of the groove are inclined planes. The side wall of the groove close to the pile foundation is connected to the outer peripheral surface of the pile foundation head; a second waterproof layer is also constructed above the pile foundation head, and the second waterproof layer extends out of the edge of the pile foundation head and is connected to the end of the first waterproof layer facing the pile foundation.

[0009] Preferably, the raft foundation section of the pile cap adopts the steel bar binding process for raft foundation, and the pile foundation section of the pile cap adopts the steel bar binding process for pile foundation cap.

[0010] Preferably, the deep piles include a first pile foundation and a second pile foundation. The first pile foundation is located between the shallow piles and the second pile foundation; the first pile foundation and the second pile foundation are connected by a number of additional steel bars, and the additional steel bars are respectively connected to the stirrups of the first pile foundation and the stirrups of the second pile foundation through connecting components.

[0011] Preferably, the pile foundation is connected through a connecting structure of a non-uniform stratum reinforced pipe pile and the pile cap; the connecting structure of the non-uniform stratum reinforced pipe pile and the pile cap includes: a pipe pile, a well cage and a supporting plate. A number of connecting hooks are fixed on the inner wall of the pipe pile, and the number of connecting hooks are arranged at the designed installation positions at the bottom end of the well cage, and the connecting hooks can hold the bottom end of the well cage.

[0012] Preferably, at least three limiting blocks are also fixed on the inner wall of the pipe pile. The limiting blocks are located below the connecting hooks, and the three limiting blocks form a positioning surface; the supporting plate is located between the connecting hooks and the positioning surface, and an elastic member is arranged between the supporting plate and the positioning surface. The lower end of the elastic member is fixedly connected to the limiting block, and the elastic member is used to support the supporting plate.

[0013] Preferably, the groove includes: a first side wall, a second side wall and a bottom plane. The first side wall slopes downward and then connects to one end of the bottom plane far from the pile foundation. One end of the bottom plane facing the pile foundation slopes upward and then connects to the second side wall, and the end of the second side wall far from the bottom plane is connected to the outer peripheral surface of the pile foundation head.

[0014] Preferably, the waterproof coiled material layer includes a waterproof coiled material and an additional waterproof coiled material. The waterproof coiled material is applied on the entire cushion layer, and the additional waterproof coiled material is applied on the waterproof coiled material and is located above the groove.

[0015] Preferably, a first sealant is applied between the waterproof coiled material layer and the outer peripheral surface of the pile foundation head.

[0016] Preferably, a water stop ring is provided on the anchor bar, and the water stop ring is made of a water-swellable rubber material.

[0017] Preferably, a steel casing is sleeved outside the water stop ring, and a clamp is installed on the outer periphery of the steel casing.

[0018] Beneficial effects:

[0019] A house foundation reinforcement structure in a heterogeneous formation disclosed in the present application enhances the overall stability by reasonably selecting the foundation type, adjusting the foundation weight distribution, and reducing the unbalanced effect of the bearing platform when subjected to lateral forces. Additionally, by adjusting the specific layout of the pile foundation, the overall stability of the bearing platform is enhanced, effectively resisting the possible overturning moment. For the slight inclination still existing in the bearing platform, grooves are provided on the cushion layer to prevent the waterproof coiled material layer from easily detaching from the side wall of the pile head, and further enhanced sealing is achieved through the cooperation of the first waterproof layer and the second waterproof layer, avoiding water penetration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the 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 also be obtained based on these drawings.

[0021] Figure 1 Structural schematic diagram of a house foundation reinforcement structure in a heterogeneous formation disclosed in Embodiment 1 of the present invention;

[0022] Figure 2 Structural schematic diagram of the deep pile of a house foundation reinforcement structure in a heterogeneous formation disclosed in Embodiment 1 of the present invention;

[0023] Figure 3 Schematic diagram showing the connection of the additional reinforcement bars and stirrups of a house foundation reinforcement structure in a heterogeneous formation disclosed in Embodiment 1 of the present invention through cross fasteners;

[0024] Figure 4 Structural schematic of the connection structure between the reinforced pipe pile and the bearing platform in a heterogeneous formation disclosed in Embodiment 2 of the present invention Figure 1 ;

[0025] Figure 5 Structural schematic of the connection structure between the reinforced pipe pile and the bearing platform in a heterogeneous formation disclosed in Embodiment 2 of the present invention Figure 2 ;

[0026] Figure 6 Structural schematic of the connection structure between the reinforced pipe pile and the bearing platform in a heterogeneous formation disclosed in Embodiment 2 of the present invention Figure 3 ;

[0027] Figure 7 Structural schematic diagram of the waterproof structure of the basement pile head in a heterogeneous formation disclosed in Embodiment 3 of the present invention;

[0028] Figure 8 For Figure 7 Partial enlarged view of A in

[0029] Figure 9 It is the top view of the waterproof structure of the basement pile head in the heterogeneous formation disclosed in Embodiment 3 of the present invention;

[0030] Figure 10 It is a schematic diagram of the waterproof coiled material layer of the waterproof structure of the basement pile head in the heterogeneous formation disclosed in Embodiment 3 of the present invention;

[0031] Figure 11 It is an assembly schematic diagram of the water stop ring, anchor reinforcement, steel casing and clamp of the waterproof structure of the basement pile head in the heterogeneous formation disclosed in Embodiment 3 of the present invention.

[0032] 1. Cap; 11. Cap of raft foundation section; 111. Main body section; 112. Extension section; 12. Cap of pile foundation section; 121. Upper cap; 122. Lower cap;

[0033] 21. Shallow pile; 22. Deep pile; 221. First pile foundation; 222. Second pile foundation; 223. Additional reinforcement; 224. Stirrup; 225. Cross fastener; 226. Anchor reinforcement; 23. Pipe pile; 24. Well cage; 25. Support plate; 26. Connecting hook; 27. Limit block; 28. Elastic member;

[0034] 31. Soft soil layer; 32. Hard rock layer; 33. Plain fill layer; 4. Cushion;

[0035] 51. First waterproof layer; 52. Second waterproof layer; 531. First side wall; 532. Second side wall; 533. Bottom plane of the groove;

[0036] 61. Waterproof coiled material; 62. Additional waterproof coiled material; 63. First sealant; 64. Water stop ring; 65. Second sealant; 66. Steel casing; 67. Clamp;

[0037] 7. Load-bearing column. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0039] Embodiment 1

[0040] A house foundation reinforcement structure in a heterogeneous formation, in combination with Figure 1 、 Figure 7 and Figure 8As shown in the figure, it includes a bearing platform 1, a pile foundation, several load-bearing columns 7 and a waterproof structure for the pile heads in the basement in a heterogeneous stratum. The bearing platform 1 includes a raft foundation section bearing platform 11 and a pile foundation section bearing platform 12; the raft foundation section bearing platform 11 includes a main section 111 and an extension section 112 extending from the side wall of the main section 111. The pile foundation section bearing platform 12 includes an upper bearing platform 121 and a lower bearing platform 122 located on the upper and lower sides of the extension section 112; the side wall of the main section 111 abuts against the side wall of the lower bearing platform 122, the upper surface of the main section 111 is higher than the upper surface of the lower bearing platform 122, and the extension section 112 covers the upper surface of the lower bearing platform 122; the upper surface of the upper bearing platform 121 is flush with the upper surface of the main section 111, the upper bearing platform 121 abuts against the side wall of the main section 111, and the distance between the end of the upper bearing platform 121 away from the main section 111 and the main section 111 is less than the distance between the end of the lower bearing platform 122 away from the main section 111 and the main section 111; several load-bearing columns 7 are arranged on the upper surface of the upper bearing platform 121 for supporting the house; the pile foundation includes shallow piles 21 and deep piles 22, and the shallow piles 21 and deep piles 22 support the lower bearing platform 122, and the shallow piles 21 are located between the deep piles 22 and the main section 111. The waterproof structure for the pile heads in the basement in a heterogeneous stratum includes: a cushion 4, a waterproof coiled material layer, a first waterproof layer 51, and anchor bars 226. The cushion 4 is provided with a groove that surrounds the head of the pile foundation. Both side walls of the groove are inclined surfaces, and the side wall of the groove close to the pile foundation is connected to the outer peripheral surface of the pile foundation head; a second waterproof layer 52 is also constructed above the pile foundation head, and the second waterproof layer 52 extends beyond the edge of the pile foundation head and is connected to the end of the first waterproof layer 51 facing the pile foundation.

[0041] First, by reasonably selecting the foundation type, raft foundation section pile caps 11 and pile foundation section pile caps 12 are adopted in different regions to adjust the weight distribution of the building foundation, reduce the unbalanced effect of pile cap 1 when subjected to lateral forces, and thus enhance the overall stability. Secondly, by adjusting the specific layout of the pile foundation, shallow piles 21 are used on the side prone to settlement, and deep piles 22 are used on the side prone to heave. They not only bear the vertical load but also resist the horizontal force through their deep anchoring effect, effectively resisting the possible overturning moment, and then ensuring the stability of pile cap 1 and several load-bearing columns 7. The combined action of these comprehensive measures ensures the stability and reliability of pile cap 1 and load-bearing columns 7 in various complex environments, making the entire building foundation stable, firm and safe; at the same time, it also provides a solid guarantee for the safe loading and unloading of goods, is conducive to improving the efficiency of loading and unloading operations, and makes the logistics transportation of the project smoother. The pile head waterproof structure is formed by setting a groove on the cushion layer 4, and then laying a waterproof coiled material layer, a first waterproof layer 51 and a second waterproof layer 52 on the cushion layer 4. The second waterproof layer 52 is connected and sealed with the first waterproof layer 51. For the slight inclination still existing in pile cap 1, the inclined surface of the pile cap will act on the waterproof coiled material layer located on the inclined surface of the groove away from the pile foundation and the waterproof coiled material layer located at the bottom of the groove. Through the expansion and contraction characteristics of the waterproof coiled material layer itself, the influence of the inclined surface of the pile cap can be compensated, and the waterproof coiled material layer located on the inclined surface of the groove close to the pile foundation can be prevented from detaching from the side wall of the pile foundation to form a water seepage gap. For the waterproof coiled material layer located on the inclined surface of the groove close to the pile foundation affected by the inclined surface of the pile cap, the acting force of the inclined surface of the pile cap causes this part of the waterproof coiled material layer to approach the side wall of the pile foundation. In summary, the combined action of the above structures can prevent water from seeping through the side wall of the pile head and ensure the waterproofing of the factory.

[0042] Preferably, the raft foundation section pile cap 11 adopts the raft foundation steel bar binding process. On the higher side, a lightweight raft foundation steel bar binding process is adopted and it covers the entire foundation, which not only reduces the weight of this area, helps to disperse the load, but also can achieve a tight combination with the pile foundation section pile cap 12. The pile foundation section pile cap 12 adopts the pile foundation cap steel bar binding process. This kind of foundation can penetrate deep into the ground, provide stronger supporting force, and has good economic benefits. The raft foundation section pile cap 11 and the pile foundation section pile cap 12 are integrally cast. The raft foundation section pile cap 11 and the pile foundation section pile cap 12 are combined through different steel bar binding techniques to ensure the overall strength and stability after integral casting.

[0043] Preferably, in combination with Figure 1 、 Figure 2 and Figure 3As shown, the deep pile 22 includes a first pile foundation 221 and a second pile foundation 222. The first pile foundation 221 is located between the shallow pile 21 and the second pile foundation 222. The first pile foundation 221 and the second pile foundation 222 are connected by a number of additional steel bars 223. The additional steel bars 223 are respectively connected to the stirrups 224 of the first pile foundation 221 and the stirrups 224 of the second pile foundation 222 through connection components. By adding additional steel bars 223 to connect the first pile foundation 221 and the second pile foundation 222, the tensile and uplift effect of the deep pile 22 is fully utilized to resist the tendency of inclination.

[0044] Preferably, the connection component adopts a cross fastener 225 to ensure the tight combination of the additional steel bar 223 and the stirrup 224.

[0045] Preferably, the shallow pile 21, the first pile foundation 221 and the second pile foundation 222 all adopt end-bearing piles, so that they can well bear the vertical load transmitted by the bearing platform 1.

[0046] Preferably, the bearing platform 1 is arranged on the soft soil layer 31, and the shallow pile 21, the first pile foundation 221 and the second pile foundation 222 extend to the hard rock layer 32, so that the pile foundation can be more firmly embedded in the formation, thereby greatly improving its tensile and uplift performance, ensuring that even under extreme conditions, the bearing platform 1 can remain stable and no adverse inclination phenomenon will occur.

[0047] Embodiment 2

[0048] The difference between this embodiment and Embodiment 1 is that the shallow pile 21 is connected through a connecting structure of a non-uniform formation reinforced pipe pile and the bearing platform.

[0049] Combined Figure 4 、 Figure 5 and Figure 6 As shown, the connecting structure of the non-uniform formation reinforced pipe pile and the bearing platform includes: a pipe pile 23, a well cage 24 and a supporting plate 25. A number of connecting hooks 26 are fixed on the inner wall of the pipe pile 23. The number of connecting hooks 26 is arranged at the designed installation position at the bottom end of the well cage 24, and the connecting hooks 26 can support the bottom end of the well cage 24. By arranging a number of connecting hooks 26 on the inner wall of the pipe pile 23 to support the bottom end of the well cage 24, the limitation of the bottom end position of the well cage 24 is realized, and the well cage 24 is ensured to be lowered to the designed installation position. It avoids erecting steel bars above the port of the pipe pile 23, which is convenient for workers to construct, improves the construction efficiency and ensures the construction safety.

[0050] Preferably, a number of connecting hooks 26 are circumferentially distributed on the inner wall of the pipe pile 23, so that the connecting hooks 26 can support the bottom end of the well cage 24 evenly and reliably.

[0051] Preferably, the connecting hook 26 is in an "L" shape. The short side of the connecting hook 26 is fixed to the inner wall of the pipe pile 23, and the long side is vertically upward. When the well cage 24 is lowered, it can be sleeved on the long sides of a plurality of connecting hooks 26, playing a certain positioning role to prevent the well cage 24 from shaking.

[0052] Specifically, the end of the short side of the connecting hook 26 is welded and fixed to the inner wall of the pipe pile 23.

[0053] Preferably, the well cage 24 is also provided with anchoring steel bars 226, and the anchoring steel bars 226 are buried in the bearing platform 1 to strengthen the connection between the pile foundation and the bearing platform 1.

[0054] Preferably, at least three limiting blocks 27 are further fixed to the inner wall of the pipe pile 23. The limiting blocks 27 are located below the connecting hook 26, and the three limiting blocks 27 form a positioning surface; the support plate 25 is located between the connecting hook 26 and the positioning surface, and an elastic member 28 is arranged between the support plate 25 and the positioning surface. The lower end of the elastic member 28 is fixedly connected to the limiting block 27, and the elastic member 28 is used to support the support plate 25. Under the action of the poured concrete, the support plate 25 continuously compresses the elastic member 28 and continuously sinks until the support plate 25 abuts against the limiting block 27 and then the support plate 25 stops descending. Compared with the previous manual throwing, this structure can place the support plate 25 at the designated position more accurately, making the connection structure more stable after pouring concrete.

[0055] Specifically, the limiting block 27 is welded and fixed to the inner wall of the pipe pile 23, and the elastic member 28 is a spring. The lower end of the spring is fixedly connected to the upper surface of the limiting block 27 by welding.

[0056] Preferably, it further includes a cushion layer 4, and the top end of the pipe pile 23 passes through the cushion layer 4.

[0057] Embodiment 3

[0058] The difference between this embodiment and Embodiment 1 lies in the waterproof structure of the basement pile head in the non-uniform stratum.

[0059] Preferably, in combination with Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 as shown, the groove includes: a first side wall 531, a second side wall 532 and a bottom plane 533 of the groove. The first side wall 531 is inclined downward and then connects to one end of the bottom plane 533 far from the pile foundation. One end of the bottom plane 533 facing the pile foundation is inclined upward and then connects to the second side wall 532. The end of the second side wall 532 far from the bottom plane 533 is connected to the outer peripheral surface of the pile foundation head. The setting of the groove avoids water flowing obliquely downward along the waterproof coiled material layer to the connection gap between the waterproof coiled material layer and the side wall of the pile head, thereby avoiding leakage due to the shrinkage phenomenon of the concrete itself resulting in gaps around the pile head.

[0060] Preferably, the first waterproof layer 51 is a 50-mm-thick polymer cement waterproof mortar layer with a ratio of 1:2, and the second waterproof layer 52 is a 50-mm-thick polymer cement waterproof mortar layer with a ratio of 1:2.5.

[0061] Specifically, the second waterproof layer 52 overlaps on the first waterproof layer 51, covering the connection position between the first waterproof layer 51 and the side wall of the pile foundation. After the first waterproof layer 51 and the second waterproof layer 52 are applied and solidified, they form a good connection and seal.

[0062] Preferably, the waterproof coiled material layer includes a waterproof coiled material 61 and an additional waterproof coiled material 62. The waterproof coiled material 61 is applied on the entire cushion layer 4, and the additional waterproof coiled material 62 is applied on the waterproof coiled material 61 and is located above the groove to strengthen the waterproof ability of the groove part.

[0063] Preferably, a first sealant 63 is applied between the outer peripheral surface of the waterproof coiled material layer and the head of the pile foundation to prevent gaps from appearing at the connection between the waterproof coiled material layer and the side wall of the pile head due to the shrinkage of the concrete itself.

[0064] Specifically, the first sealant 63 is a one-component polyurethane sealant, which has excellent adhesive performance and weather resistance and can effectively prevent water penetration.

[0065] Preferably, a plain fill layer 33 is constructed under the cushion layer 4 to form an initial groove shape, facilitating the construction of the cushion layer 4.

[0066] Preferably, a water stop ring 64 is provided on the anchor reinforcement 226. The water stop ring 64 is made of a water-swellable rubber material. When the water stop ring 64 encounters moisture, it will quickly expand and closely adhere to the surface of the anchor reinforcement 226, thus forming an effective waterproof barrier to hinder water penetration.

[0067] Preferably, the bottom of the water stop ring 64 is fixed to the second waterproof layer 52 by bonding with a second sealant 65. In this embodiment, the second sealant 65 is also a one-component polyurethane sealant.

[0068] Preferably, a steel casing 66 is sleeved outside the water stop ring 64, and a clamp 67 is installed on the outer periphery of the steel casing 66. This prevents the water stop ring 64 from absorbing excessive water, resulting in changes in shape and size, or even displacement, thus affecting its normal waterproof effect.

[0069] Embodiment 4

[0070] This embodiment provides a construction method for a house foundation reinforcement structure in a heterogeneous formation, including the following steps:

[0071] S1. Construct shallow piles and deep piles:

[0072] S11. Construct shallow piles:

[0073] Weld connection hooks on the inner wall of the pipe pile, and place the supporting plate into the pipe pile; then weld the spring on the limiting block, and then install the spring and the limiting block into the pipe pile, and fix the limiting block on the inner wall of the pipe pile by welding.

[0074] Clean the construction area, drill holes with a drilling rig, and drive the pipe pile into the ground according to the design requirements until reaching the hard rock layer, and the pipe pile depths of the shallow piles and the deep piles respectively reach the design depths and maintain verticality.

[0075] Lift the well cage by a crane and lower it into the pipe pile until the connection hook holds the well cage.

[0076] Pour C35 concrete into the pipe pile. Under the gravity of the C35 concrete, the supporting plate continuously sinks, and the spring is continuously compressed until the spring is flattened and the supporting plate stops sinking after abutting against the limiting block. Stop pouring the C35 concrete when it reaches the bottom end of the well cage.

[0077] Immediately carry out concrete pouring after the inspection of the well cage is completed. When pouring concrete, technological operations such as vibration, flushing and compaction need to be carried out simultaneously.

[0078] After the pouring is completed, curing and strength testing are required to ensure the quality and stability of the shallow piles.

[0079] S12. Construct deep piles:

[0080] Set out the position and line, and excavate the soil body to obtain the pile holes for installing the first pile foundation and the second pile foundation.

[0081] Lift and place the steel reinforcement cages of the first pile foundation and the second pile foundation by a crane, and fix the additional steel bars on the steel reinforcement cages of the first pile foundation and the second pile foundation by cross fasteners.

[0082] Backfill the soil between the steel reinforcement cages, and then pour concrete, and cure and form to obtain deep piles.

[0083] S2. Carry out plain soil compaction on the seal layers around the shallow piles and the deep piles to obtain a plain soil layer, and construct the initial contour of the groove on the plain soil layer to provide a basis for subsequent work. Then pour C15 concrete on the plain soil layer to obtain a cushion layer.

[0084] Lay waterproof coiled materials on the cushion layer, and lay additional waterproof coiled materials at the positions corresponding to the grooves on the waterproof coiled materials; during the laying process, it is necessary to ensure that the coiled materials are flat and without wrinkles to maximize their waterproof performance. Apply one-component polyurethane sealant at the joints between the waterproof coiled materials, the additional waterproof coiled materials and the outer periphery of the pile for bonding and sealing.

[0085] S4. Apply 50-mm-thick 1:2 polymer cement waterproof mortar to level and form the first waterproof layer. Manually clean the pile head, wash away the miscellaneous soil, and apply 50-mm-thick 1:2.5 polymer cement waterproof mortar to level and form the second waterproof layer at the pile head. The second waterproof layer extends outward beyond the pile head edge and is leveled onto the first waterproof layer.

[0086] Set a water stop ring on the anchor reinforcement, and bond the water stop ring to the second waterproof layer with one-component polyurethane sealant; set a steel casing outside the water stop ring and tighten the steel casing with a clamp.

[0087] S5. Bind the steel bar framework of the lower bearing platform of the pile foundation section of the bearing platform above the shallow piles and deep piles.

[0088] S6. Bind the steel bar framework of the main section of the raft foundation section of the bearing platform on the side of the steel bar framework of the lower bearing platform, and bind the steel bar framework of the extension section of the raft foundation section of the bearing platform above the steel bar framework of the lower bearing platform.

[0089] S7. Bind the steel bar framework of the upper bearing platform of the pile foundation section of the bearing platform above the steel bar framework of the extension section.

[0090] S8. Pour concrete integrally to construct the bearing platform.

[0091] S9. Bind the steel bar framework of the load-bearing column on the upper bearing platform and install the forming template of the load-bearing column, and pour concrete to construct the load-bearing column;

[0092] S10. Remove the forming template of the load-bearing column.

[0093] 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 them; 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 make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A house foundation reinforcement structure in a heterogeneous stratum, comprising a cap (1), a pile foundation, a plurality of load-bearing columns (7) and a pile head waterproof structure, characterized in that: The cap (1) comprises a raft foundation section cap (11) and a pile foundation section cap (12); the raft foundation section cap (11) comprises a main section (111) and an extension section (112) extending from the side wall of the main section (111); the pile foundation section cap (12) comprises an upper cap (121) and a lower cap (122) located at the upper and lower sides of the extension section (112); the side wall of the main section (111) abuts against the side wall of the lower cap (122); the upper surface of the main section (111) is higher than the lower surface of the lower cap (122); The upper surface of the lower support platform (122) is covered by the extension section (112); the upper surface of the upper support platform (121) is flush with the upper surface of the main section (111); the upper support platform (121) abuts against the side wall of the main section (111); the distance between one end of the upper support platform (121) away from the main section (111) and the main section (111) is smaller than the distance between one end of the lower support platform (122) away from the main section (111) and the main section (111); A plurality of load-bearing columns (7) are arranged on the upper surface of the upper support platform (121) for supporting the house; The pile foundation comprises shallow piles (21) and deep piles (22), wherein the shallow piles (21) and the deep piles (22) support the lower cap (122), and the shallow piles (21) are located between the deep piles (22) and the main body section (111); The pile head waterproof structure comprises: a cushion layer (4), a waterproof coiled material layer, a first waterproof layer (51), and anchoring steel bars (226); the cushion layer (4) is provided with a groove, the groove is arranged around the head of the pile foundation, both side walls of the groove are inclined surfaces, the side wall of the groove close to the pile foundation is connected to the outer peripheral surface of the pile foundation head; a second waterproof layer (52) is also applied above the pile foundation head, the second waterproof layer (52) extends out of the edge of the pile foundation head and connects the end of the first waterproof layer (51) toward the pile foundation.

2. A building foundation reinforcement structure in a heterogeneous stratum according to claim 1, characterized in that: The raft foundation section cap (11) adopts a raft foundation reinforcement binding process, and the pile foundation section cap (12) adopts a pile foundation cap reinforcement binding process.

3. The building foundation reinforcement structure in a heterogeneous stratum according to claim 1, characterized in that: The deep pile (22) comprises a first pile foundation (221) and a second pile foundation (222), wherein the first pile foundation (221) is located between the shallow pile (21) and the second pile foundation (222); the first pile foundation (221) and the second pile foundation (222) are connected via a plurality of additional reinforcements (223), wherein the additional reinforcements (223) are respectively connected to the stirrups (224) of the first pile foundation (221) and the stirrups (224) of the second pile foundation (222) via a connecting assembly.

4. The building foundation reinforcement structure in a heterogeneous stratum according to claim 1, characterized in that: The pile foundation is connected via a heterogeneous stratum reinforcement pipe pile and a cap connection structure; the heterogeneous stratum reinforcement pipe pile and a cap connection structure comprises: a pipe pile (23), a well cage (24) and a support plate (25); a plurality of connection hooks (26) are fixed to the inner wall of the pipe pile (23); the plurality of connection hooks (26) are arranged at a designed installation position at the bottom end of the well cage (24); and the connection hooks (26) can support the bottom end of the well cage (24).

5. A building foundation reinforcement structure in a heterogeneous stratum according to claim 4, characterized in that: At least three limit blocks (27) are fixed to the inner wall of the pipe pile (23), and the limit blocks (27) are located below the connecting hook (26). The three limit blocks (27) form a positioning surface; the support plate (25) is located between the connecting hook (26) and the positioning surface, and an elastic member (28) is provided between the support plate (25) and the positioning surface. The lower end of the elastic member (28) is fixedly connected to the limit block (27), and the elastic member (28) is used to support the support plate (25).

6. The building foundation reinforcement structure in a heterogeneous stratum according to claim 1, characterized in that: The groove comprises: a first side wall (531), a second side wall (532) and a groove bottom plane (533); the first side wall (531) is inclined downward and connected to an end of the groove bottom plane (533) away from the pile foundation; an end of the groove bottom plane (533) facing the pile foundation is inclined upward and connected to the second side wall (532); an end of the second side wall (532) away from the groove bottom plane (533) is connected to the outer peripheral surface of the pile foundation head.

7. A building foundation reinforcement structure in a heterogeneous stratum according to claim 6, characterized in that: The waterproof roll material layer comprises a waterproof roll material (61) and an additional waterproof roll material (62), wherein the waterproof roll material (61) is applied on the entire cushion layer (4), and the additional waterproof roll material (62) is applied on the waterproof roll material (61) and is located above the groove.

8. A building foundation reinforcement structure in a heterogeneous stratum according to claim 7, characterized in that: A first sealant (63) is coated between the waterproof coiled material layer and the outer peripheral surface of the pile foundation head.

9. The building foundation reinforcement structure in a heterogeneous stratum according to claim 6, characterized in that: The anchoring steel bar (226) is provided with a water stop ring (64), and the water stop ring (64) is made of a rubber material that expands when exposed to water.

10. A building foundation reinforcement structure in a heterogeneous stratum according to claim 9, characterized in that: A steel sleeve (66) is disposed outside the water stop ring (64), and a clamp (67) is installed on the outer periphery of the steel sleeve (66).

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