A foundation structure in house construction

Abstract

The invention relates to a foundation structure in house construction, comprising an original soil layer, a foundation cushion layer, a first bearing layer, a second bearing layer, a main pile system, a secondary pile system and a shock absorbing system; the main pile system comprises a main pile, a central column, a connecting beam, a peripheral column and a cross seat, a plurality of connecting beams are evenly distributed on the outer side of the central sleeve, a peripheral column is arranged at the bottom of each connecting beam, a cross seat is fixed at the bottom of the peripheral column, an embedding groove is excavated on the surface of each layer after compaction, and the lower half of the cross seat is embedded in the embedding groove of the lower layer; the secondary pile system comprises secondary piles, the secondary piles penetrate through and are anchored on a foundation body, the shock absorbing system comprises a main base, a secondary base and a shock absorbing rod, the main base is fixed on the upper part of the main pile, the secondary base is fixed on the upper part of the secondary pile, and the shock absorbing rod is connected between the main base and the secondary base, the invention pre-buries a multi-layer main pile anchoring system in the foundation body, and after the main piles are applied, the layers are interconnected, thereby improving the overall stability of the foundation body.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a foundation structure in house construction. Background Art

[0002] The foundation refers to the soil or rock supporting the base of a building. The soil layers serving as the foundation of a building are divided into rock, crushed stone, sand, silt, clay and artificial fill. There are two types of foundations: natural foundations and artificial foundations (composite foundations). Natural foundations are natural soil layers that do not require human reinforcement, while artificial foundations require human reinforcement. Common ones include stone chip cushion layers, sand cushion layers, mixed lime soil backfill and compaction, etc.

[0003] The existing technology, such as the invention patent with application number 201910365931.4, discloses a foundation structure in house construction, including an original soil layer and a foundation pit, a foundation pit is provided at the middle end of the original soil layer, the original soil layer and the foundation pit are formed by excavating the original soil layer, a mortar cushion layer is provided at the bottom of the foundation pit, the foundation pit and the mortar cushion layer are formed by compacting the bottom of the foundation pit, the waterproof coating of the present invention consists of a surface paint, a primer and a sealing paint, and the waterproof coating is applied to the upper end of the reinforced concrete layer, the sealing paint is first applied to the upper end of the reinforced concrete layer to keep it flat and closed, and then the primer is applied on the sealing paint for primer, and then the surface paint is applied on the primer to increase the waterproofness, and it has a multi-layer foundation structure, but due to the different materials between the multi-layer foundations, after encountering a strong earthquake, the contact surfaces between the layers are prone to displacement and collapse.

[0004] The existing technology, such as the invention patent with application number 201910598150.X, discloses a pile-driven composite casting foundation, including a foundation body, vertical long piles, vertical short piles, a cap and frame columns. The main reinforcement of the vertical long piles and the main reinforcement of the vertical short piles extend from the bottom into the cap. The vertical long piles are distributed in a square shape with the center of the bottom of the cap as the center, and the vertical short piles are distributed in a square shape with the center of the bottom of the cap as the center. This structure has multiple layers of cushion layers, which directly drive piles of different lengths into corresponding positions in the foundation cushion layer. The pile body and each layer of the cushion layer are connected only by the pile body itself, and the anchoring strength is weak.

[0005] Therefore, in view of the problems in the prior art such as weak anchoring strength of piles and easy slippage of contact surfaces between layers, the lack of necessary shock-absorbing measures in the foundation after a strong earthquake and weak shock-absorbing capacity, it is necessary to study a foundation structure in house construction. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a foundation structure for house construction, which effectively solves the problems of weak anchoring strength of existing piles, easy slippage of contact surfaces between layers, lack of necessary shock-absorbing measures in the foundation after a strong earthquake, and weak shock-absorbing ability.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a foundation structure in house construction, including an original soil layer, a foundation cushion layer, a first bearing layer, a second bearing layer, a main pile system, a secondary pile system and a shock absorption system; a foundation pit is excavated in the original soil layer, and the foundation cushion layer, the first bearing layer and the second bearing layer are sequentially arranged in the foundation pit from bottom to top to form a foundation body, and the foundation cushion layer, the first bearing layer and the second bearing layer are laid layer by layer, and after each layer is laid, compaction operation is performed on the upper surface of the layer; the main pile system includes a main pile, a central column, a connecting beam, a peripheral column and a cross seat, and the central column is provided with a central sleeve, and the outer side of the central sleeve is A plurality of connecting beams are arranged, and a peripheral column is arranged at the bottom of each connecting beam, and a cross seat is fixed at the bottom of the peripheral column. An embedding groove is excavated on the surface of each compacted layer, and the lower half of the cross seat is embedded in the embedding groove of the lower layer, and the upper half is exposed and pre-buried in the bottom of the upper layer; the main piles penetrate and are anchored in the foundation body; the secondary pile system includes secondary piles, and the secondary piles penetrate and are anchored in the foundation body; the shock absorbing system includes a main base, a secondary base and a shock absorbing rod, the main base is fixed on the upper part of the main pile, the secondary base is fixed on the upper part of the secondary pile, the shock absorbing rod is connected between the main base and the secondary base, and the main base and the secondary base are fixed at the bottom of the building body as the foundation.

[0008] Furthermore, the cross seat includes a horizontal connecting tube and a vertical connecting tube, both of which are hollow structures, which are fixed together, and the inner cavities of the two connecting tubes are interconnected. A filling port is opened at the upper part of any connecting tube, and slurry discharge ports are set at the bottom and sides of the two connecting tubes. The cross seat is nested in the embedding groove, and mortar is filled into the inner cavity from the filling port, and the mortar that fills the embedding groove is discharged from the slurry discharge port.

[0009] Furthermore, a positioning plate is extended outward from the middle of the horizontal connecting tube and the vertical connecting tube, and the slurry discharge port is located below the positioning plate.

[0010] Furthermore, the middle portion of the peripheral column is a hollow structure with openings at both ends, the hollow structure is filled with anchoring materials, and reinforcement piles are anchored in the peripheral column.

[0011] Furthermore, the middle part of the central column is a hollow structure with openings at both ends, the hollow structure is filled with anchoring materials, and the main piles are anchored on the anchoring materials in the central column.

[0012] Furthermore, an anchor column is provided in the middle of the connecting beam, the middle of the anchor column is filled with anchoring material, and the main pile is anchored in the anchor column or the central column.

[0013] Furthermore, the shock-absorbing rod includes a shock-absorbing cylinder, a connecting rod and shock-absorbing rubber, a middle partition is arranged in the middle of the shock-absorbing cylinder, a left partition and a right partition are arranged on both sides of the middle partition, and a left chamber and a right chamber are respectively formed on both sides of the middle of the shock-absorbing cylinder, the shock-absorbing rubber is correspondingly matched and nested in the left chamber and the right chamber, a connecting hole is arranged in the middle of the left partition and the right partition, the inner end of the connecting rod passes through the connecting hole and is fixedly connected to the shock-absorbing rubber, and the connecting rods extending outward on both sides are respectively fixedly connected to the main base and the secondary base.

[0014] Furthermore, the connecting beam is a telescopic and adjustable structure, a mounting hole is provided at the end of the connecting beam, a mounting head is provided at the upper part of the peripheral column, and the mounting head is fixedly sleeved in the mounting hole.

[0015] Furthermore, a foundation construction method in housing construction includes the following steps:

[0016] Step 1: Excavate the foundation pit on the original soil layer

[0017] First, the site is leveled, and then the lines are laid out. The original soil layer is excavated and supported by a hollow island excavation method to form a foundation pit structure;

[0018] Step 2: Fill the base layer

[0019] Fill the foundation cushion into the foundation pit and compact it. Determine the main node position according to the drawing position, and then open a cross-shaped embedded groove at the main node position. After the embedded groove construction is completed, the lower half of the cross-shaped cross seat is matched and placed in the embedded groove, and the upper half is exposed on the upper part of the foundation cushion layer. The center seat is located or suspended above the foundation cushion layer;

[0020] Step 3: Secure the cross seat

[0021] Inject mortar into the interior through the grouting port of the cross seat, fill the interior of the cross seat with mortar, and discharge the mortar from the grouting port to ensure that the mortar fills the embedding groove, so that the cross seat and the embedding groove are firmly connected;

[0022] Step 4: Fill the first bearing layer

[0023] Pour the first bearing layer material into the foundation pit and cover the main pile system, then compact it, dig a groove on the upper surface of the compacted first bearing layer, and fix the cross seat in the groove in the same way as in step three;

[0024] Step 5: Fill the second bearing layer

[0025] Pour the second bearing layer material into the foundation pit and cover the main pile system, then compact it, dig a groove on the upper surface of the compacted second bearing layer, and fix the cross seat in the groove in the same way as in step three;

[0026] Step 6: Construction of main piles and secondary piles

[0027] During the installation construction nodes, the main piles, reinforcement piles and secondary piles are drilled and anchored in sequence on the main body of the foundation. The main piles and reinforcement piles penetrate the middle of the central column and the peripheral column respectively, and the secondary piles are directly anchored on the main body of the foundation.

[0028] Step 7: Stabilize the main base and the secondary base

[0029] Fix the main base to the upper part of the main pile and the reinforcement pile, fix the secondary base to the upper part of the secondary pile, and then connect the shock-absorbing rod between the main base and the secondary base; finally, construct the main building body on the upper part of the main base and the secondary base.

[0030] Furthermore, the filling material of the foundation cushion layer is crushed stone and stone powder in a mass ratio, the filling material of the first bearing layer is graded sand, and the second bearing layer is clay.

[0031] The beneficial effect of the above technical solution is: the present invention is aimed at a multi-layer foundation pit backfill foundation structure, and compaction work is carried out after each layer of backfill is completed, and an embedding groove is excavated on the surface of the compacted cushion layer, and the cross seat is matched and seated in the embedding groove, and mortar is poured to make the cross seat and the embedding groove form a whole. This structure can enhance the stability of the cross seat, improve the connection strength between the cross seat and the lower cushion layer, and form an anchor point at the same time. At the same time, the structure of the cross seat has a horizontal and vertical cross structure, which can resist various earthquake movements. After applying the upper cushion layer, the upper cushion layer buries the cross seat, peripheral columns, connecting beams and central column structures therein to ensure that the central column will not be exposed. Then, after compaction, the embedding groove structure is applied at the position corresponding to the corresponding points of the lower layer, and the application of each cushion layer is completed in turn to form a foundation body with an anchor anti-slip tooling embedded inside.

[0032] Then, main piles, secondary piles and reinforcement pile structures are applied at corresponding positions on the foundation body, that is, the main piles are anchored in the central columns of each layer, the secondary piles are directly anchored in the foundation body, and the reinforcement piles are anchored in the peripheral columns. Therefore, the central column and the peripheral column in the present invention are not only reserved as structures in each cushion layer to pre-fix and stabilize the cross seat, enhance the firmness of the cross seat, and make the connection strength between the upper and lower cushion layers large to avoid slippage; at the same time, the structure also serves as an anchor body for anchoring the pile body, thereby improving the anchoring strength, and after the pile body is applied, the main pile systems are interconnected, which has a good anchoring effect, so that the layers are interconnected to form an integrated foundation structure.

[0033] At the same time, the present invention fixes a main base at the main pile and the reinforcement pile with strong anchoring ability, arranges a secondary base on the secondary pile, and arranges a shock-absorbing rod structure between the main base and the secondary base. The shock-absorbing rod structure can withstand bidirectional loads and has a good shock-absorbing effect.

[0034] Therefore, the present invention has a novel structure, a multi-layer main pile anchoring system is pre-buried in the foundation body, and the layers are interconnected after the main piles are applied, thereby improving the overall stability of the foundation body, avoiding slippage between layers, and avoiding collapse caused by foundation settlement. The structure has high stability, strong earthquake resistance, and a high safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention;

[0036] Figure 2 The schematic diagram of the main pile system;

[0037] Figure 3 for Figure 2 A top view of

[0038] Figure 4 for Figure 3 A front view of

[0039] Figure 5 is a structural diagram of the central column;

[0040] Figure 6 This is a schematic diagram of the structure where the main pile passes through the central column;

[0041] Figure 7 The schematic diagram of the main pile system;

[0042] Figure 8 It is a structural schematic diagram of the shock absorber rod;

[0043] Fig. 9 Schematic diagram of the anchored structure.

[0044] Figure numerals: 1 is the original soil layer, 2 is the foundation cushion layer, 3 is the first bearing layer, 4 is the second bearing layer, 5 is the central column, 51 is the anchoring material, 6 is the connecting beam, 7 is the peripheral column, 8 is the cross seat, 81 is the filling port, 82 is the slurry discharge port, 9 is the main pile, 91 is the inverted tooth, 10 is the reinforcement pile, 11 is the secondary pile, 12 is the main base, 13 is the secondary base, 14 is the shock-absorbing rod, 15 is the main node, 16 is the secondary node, 17 is the secondary anchoring system, 18 is the main anchoring system, 19 is the shock-absorbing cylinder, 20 is the middle partition, 21 is the right partition, 22 is the left partition, 23 is the shock-absorbing rubber, 24 is the connecting rod, and 25 is the anchoring column. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0046] Embodiment 1, this embodiment aims to provide a foundation structure for housing construction, mainly used for foundation pit structure, and aims to solve the problems that the existing housing foundation structure has weak anchoring strength of piles, contact surfaces between layers are prone to slippage, and the foundation lacks necessary shock-absorbing measures after a strong earthquake, and has weak shock-absorbing capacity. This embodiment provides a foundation structure for housing construction.

[0047] like Figure 1 In the embodiment, a foundation structure in house construction is disclosed, including an original soil layer 1, a foundation cushion layer 2, a first bearing layer 3, a second bearing layer 4, a main pile system, a secondary pile system and a shock absorption system; this embodiment is only used as an example to mainly illustrate that the foundation structure is a multi-layer structure, and the number of layers is not limited. This embodiment is described by taking three layers as an example, excavating a foundation pit in the original soil layer 1, and supporting it, and then applying a backfill structure. In the specific implementation, this embodiment takes a square foundation pit as an example to illustrate that the foundation The base cushion layer 2, the first bearing layer 3 and the second bearing layer 4 are arranged in sequence from bottom to top in the foundation pit to form the foundation body. The base cushion layer 2, the first bearing layer 3 and the second bearing layer 4 are laid layer by layer, and compaction is performed on the upper surface of each layer after the laying is completed. In this embodiment, the filling material of the base cushion layer is crushed stone and stone powder according to a mass ratio, the filling material of the first bearing layer 3 is graded sand, and the filling material of the second bearing layer 4 is clay. During implementation, they are applied layer by layer and compacted after the application of each layer is completed.

[0048] The main pile system includes a main pile 9, a central column 5, a connecting beam 6, a peripheral column 7 and a cross seat 8. A central sleeve is mounted on the central column 5, and a plurality of connecting beams 6 are evenly distributed on the outside of the central sleeve. In this embodiment, four connecting beams are provided, and are respectively distributed at four corners. The two sides correspond to each other and can interact with each other when subjected to force. A peripheral column is provided at the bottom of each connecting beam 6, and a cross seat is fixed at the bottom of the peripheral column 7. In this embodiment, the peripheral column 7 is directly welded and fixed to the bottom of the connecting beam 6, which is a specific determined size. During implementation, the central column 5 is a cylindrical structure, a connecting sleeve is fixedly welded on the central column 5, and the connecting beam is fixed on the outside of the connecting sleeve.

[0049] A groove is excavated on the surface of each layer after compaction. The groove is a square groove. The lower half of the cross seat 8 is nested in the groove of the lower layer, and the upper half is exposed and pre-buried in the bottom of the upper layer. The main pile 9 passes through each layer of cushion and is fixed in the central column. In the specific structure, the cross seat 8 includes a horizontal connecting tube and a vertical connecting tube. The horizontal connecting tube and the vertical connecting tube are square structures, which are located in the groove. The horizontal connecting tube and the vertical connecting tube are both hollow structures. The two are fixed together, and the inner cavities of the two connecting tubes are connected to each other. A filling port 81 is provided at the upper part, and slurry discharge ports 82 are provided at the bottom and sides of the two connecting pipes. The cross seat is nested in the embedding groove. Mortar is filled into the inner cavity from the filling port 81, and the mortar is discharged from the slurry discharge port 82 to fill the embedding groove. In the specific structure, a positioning plate extends outward from the middle of the horizontal connecting tube and the vertical connecting tube, and the slurry discharge port is located below the positioning plate. The positioning plate is located at the upper part of the embedding groove and is directly seated on the cushion layer, allowing a gap between the bottom of the cross seat and the bottom of the embedding groove to facilitate the pouring of mortar.

[0050] The structure of the cross seat 8 in this embodiment has a transverse and longitudinal cross structure, which can resist various earthquake movements. After the upper cushion layer is applied, the upper cushion layer buries the cross seat, peripheral columns, connecting beams and central column structure therein to ensure that the central column is not exposed. Then, after compaction, the embedded groove structure is applied at the position corresponding to the corresponding points of the lower layer, and the application of each cushion layer is completed in turn to form a foundation body with anchor anti-slip tooling embedded inside.

[0051] The secondary pile system of this embodiment includes secondary piles 11, which penetrate and are anchored on the main body of the foundation, and the structure is located between the main pile systems. Specifically, multiple secondary piles can be arranged according to the gaps. In this embodiment, two secondary piles are arranged. After the secondary piles are anchored, they form a secondary anchoring system 17.

[0052] In specific structures such as Figure 7 As shown in the figure, the middle part of the peripheral column 7 is a hollow structure with openings at both ends, and the hollow structure is filled with anchoring materials. Reinforcement piles 10 are anchored in the peripheral columns. The middle part of the central column 5 is a hollow structure with openings at both ends, and the hollow structure is filled with anchoring materials. The main piles 9 are anchored on the anchoring materials 51 in the central column. The two together constitute the main anchoring system 18. The main anchoring system 18 and the secondary anchoring system 17 are alternately arranged according to the size of the foundation pit.

[0053] like Figure 8As shown in the figure, the shock absorbing system includes a main base 12, a secondary base 13 and a shock absorbing rod 14. The main base 12 is fixed on the upper part of the main pile 9, and the secondary base 13 is fixed on the upper part of the secondary pile 11. The shock absorbing rod 14 is connected between the main base 12 and the secondary base 13. The main base 12 and the secondary base 13 are fixed to the bottom of the building body as a foundation. The shock absorbing rod 14 includes a shock absorbing cylinder 19, a connecting rod 24 and a shock absorbing rubber 23. A middle partition 20 is provided in the middle of the shock absorbing cylinder 19, and a left partition 22 and a right partition 21 are provided on both sides of the middle partition 20. A left chamber and a right chamber are formed on both sides of the middle of the shock absorbing cylinder 19 respectively. The shock absorbing rubber 23 is correspondingly matched and nested in the left chamber and the right chamber. A connecting hole is provided in the middle of the left partition 22 and the right partition 21. The inner end of the connecting rod 24 passes through the connecting hole and is fixedly connected to the shock absorbing rubber. The connecting rods extending outward on both sides are fixedly connected to the main base and the secondary base respectively.

[0054] In this embodiment, a main base is fixed at the main piles and reinforcement piles with strong anchoring ability, a secondary base is arranged on the secondary piles, and a shock-absorbing rod structure is arranged between the main base and the secondary base. The shock-absorbing rod structure can withstand bidirectional loads and has a good shock-absorbing effect. At the same time, in this embodiment, the main base and the secondary base are respectively located at the main node and secondary node of the building body, wherein the main node is the main force-bearing and supporting body, such as the main weighing beam and the turning point of the load-bearing wall, and the secondary node is the secondary force-bearing and supporting body.

[0055] This embodiment includes the following steps during the specific construction:

[0056] Step 1: Excavate the foundation pit on the original soil layer

[0057] First, the site is leveled, and then the lines are laid out. The original soil layer is excavated and supported by a hollow island excavation method to form a foundation pit structure;

[0058] Step 2: Fill the base layer

[0059] Fill the foundation cushion into the foundation pit and compact it. Determine the main node position according to the drawing position, and then open a cross-shaped embedded groove at the main node position. After the embedded groove construction is completed, the lower half of the cross-shaped cross seat is matched and placed in the embedded groove, and the upper half is exposed on the upper part of the foundation cushion layer. The center seat is located or suspended above the foundation cushion layer;

[0060] Step 3: Secure the cross seat

[0061] Inject mortar into the interior through the grouting port of the cross seat, fill the interior of the cross seat with mortar, and discharge the mortar from the grouting port to ensure that the mortar fills the embedding groove, so that the cross seat and the embedding groove are firmly connected;

[0062] Step 4: Fill the first bearing layer

[0063] Pour the first bearing layer material into the foundation pit and cover the main pile system, then compact it, dig a groove on the upper surface of the compacted first bearing layer, and fix the cross seat in the groove in the same way as in step three;

[0064] Step 5: Fill the second bearing layer

[0065] Pour the second bearing layer material into the foundation pit and cover the main pile system, then compact it, dig a groove on the upper surface of the compacted second bearing layer, and fix the cross seat in the groove in the same way as in step three;

[0066] Step 6: Construction of main piles and secondary piles

[0067] During the installation construction nodes, the main piles, reinforcement piles and secondary piles are drilled and anchored in sequence on the main body of the foundation. The main piles and reinforcement piles penetrate the middle of the central column and the peripheral column respectively, and the secondary piles are directly anchored on the main body of the foundation.

[0068] Step 7: Stabilize the main base and the secondary base

[0069] Fix the main base to the upper part of the main piles and the reinforcement piles, fix the secondary base to the upper part of the secondary piles, and then connect the shock-absorbing rod between the main base and the secondary base; finally, construct the main building body on the upper part of the main base and the secondary base.

[0070] In this embodiment, the filling material of the foundation cushion layer is crushed stone and stone powder in a mass ratio, the filling material of the first bearing layer is graded sand, and the filling material of the second bearing layer is clay. For the multi-layer foundation pit backfill foundation structure, compaction work is carried out after each layer is backfilled, and a groove is excavated on the surface of the compacted cushion layer. During implementation, the groove structure can be set to a square groove, or a cross groove with a cross section to increase the filling gap of the mortar, and the cross seat is matched and seated in the groove, and filled with mortar to make the cross seat and the groove form a whole. This structure can enhance the stability of the cross seat, improve the connection strength between the cross seat and the lower cushion layer, and form an anchor point at the same time. Then, main piles, secondary piles and reinforcement pile structures are applied at corresponding positions on the main body of the foundation, that is, the main piles are anchored in the central columns of each layer, the secondary piles are directly anchored in the main body of the foundation, and the reinforcement piles are anchored in the peripheral columns. Therefore, the central columns and peripheral columns are not only reserved as structures in each layer of cushion layer to pre-fix and stabilize the cross seat, enhance the firmness of the cross seat, and make the connection strength between the upper and lower cushion layers large to avoid slippage; at the same time, the structure also serves as an anchor body for anchoring the pile body, thereby improving the anchoring strength, and after the pile body is applied, the main pile systems are interconnected, which has a good anchoring effect, so that the layers are interconnected to form an integrated foundation structure.

[0071] Embodiment 2: This embodiment further illustrates the structure of the connecting beam.

[0072] In this embodiment, an anchor column 25 is provided in the middle of the connecting beam, the middle of the anchor column 25 is filled with anchoring materials, and the main pile is anchored in the anchor column; the connecting beam is a telescopic adjustable structure, the telescopic structure includes a sleeve rod and a sleeve, the sleeve rod is sleeved in the sleeve and locked by a locking wire, and a mounting hole is provided at the end of the connecting beam 6, and the upper mounting head of the peripheral column is fixedly sleeved in the mounting hole.

[0073] In this embodiment, multiple main piles can be anchored in the anchoring columns, and reinforcement piles can be selectively applied or not applied as needed. Four main piles are used to form a main anchoring system to provide a stable foundation for the main base.

[0074] In the above embodiment, the main pile is anchored by the anchoring material. This filling structure can have a better anchoring ability with the main pile than the compacted cushion layer, so that the pile body and the main anchoring system have a stronger connection strength. It is necessary to arrange the inverted teeth 91 on the periphery of the main pile to improve the anchoring strength, so that several limiting structures are arranged in the length direction of the main pile, and the pull-out resistance is high. At the same time, the main pile connects multiple main anchoring systems to interconnect the cushion layers. In addition, the cross seat, peripheral column, connecting beam and central column in the main anchoring system can also form a connection on the joint surface of the cushion layer to avoid mutual slippage between the cushion layers, which can better cope with vibration waves and has a good anti-seismic effect.

Claims

1. A foundation structure in housing construction, characterized in that It includes an original soil layer, a foundation cushion layer, a first bearing layer, a second bearing layer, a main pile system, a secondary pile system and a shock absorption system; a foundation pit is excavated in the original soil layer, and the foundation cushion layer, the first bearing layer and the second bearing layer are sequentially arranged in the foundation pit from bottom to top to form a foundation body, and the foundation cushion layer, the first bearing layer and the second bearing layer are laid layer by layer, and compaction operations are performed on the upper surface of each layer after laying; the main pile system includes main piles, central columns, connecting beams, peripheral columns and cross seats, the central column is provided with a central sleeve, a plurality of connecting beams are evenly distributed on the outside of the central sleeve, peripheral columns are arranged at the bottom of each connecting beam, a cross seat is fixed at the bottom of the peripheral columns, and an embedding groove is excavated on the surface of each layer after compaction, the lower half of the cross seat is embedded in the embedding groove of the lower layer, and the upper half is exposed and pre-buried in the bottom of the upper layer; the main piles penetrate and are anchored on the foundation body; the secondary pile system includes secondary piles, the secondary piles penetrate and are anchored on the foundation body, and the secondary piles penetrate and are anchored on the foundation body. The shock-absorbing system comprises a main base, a secondary base and a shock-absorbing rod, wherein the main base is fixed on the upper part of the main pile, the secondary base is fixed on the upper part of the secondary pile, the shock-absorbing rod is connected between the main base and the secondary base, and the main base and the secondary base are fixed to the bottom of the building body as a foundation; the cross seat comprises a horizontal connecting tube and a vertical connecting tube, both of which are hollow structures, which are fixed together, and the inner cavities of the two connecting tubes are interconnected, a filling port is provided at the upper part of any connecting tube, and a slurry discharge port is provided at the bottom and side of the two connecting tubes, the cross seat is nested in the embedding groove, mortar is filled into the inner cavity from the filling port, and the mortar is discharged from the slurry discharge port to fill the embedded groove; the middle part of the peripheral column is a hollow structure with openings at both ends, and the hollow structure is filled with anchoring materials, and reinforcement piles are anchored in the peripheral column; the middle part of the central column is a hollow structure with openings at both ends, and the hollow structure is filled with anchoring materials, and the main piles are anchored on the anchoring materials in the central column.

2. The foundation structure in housing construction according to claim 1, characterized in that: A positioning plate is extended outwardly from the middle of the horizontal connecting tube and the vertical connecting tube, and the slurry discharge port is located below the positioning plate.

3. The foundation structure in housing construction according to claim 1, characterized in that: An anchor column is arranged in the middle of the connecting beam, the middle of the anchor column is filled with anchoring material, and the main pile is anchored in the anchor column and / or the central column.

4. The foundation structure in housing construction according to claim 1, characterized in that: The shock-absorbing rod includes a shock-absorbing cylinder, a connecting rod and shock-absorbing rubber. A middle partition is arranged in the middle of the shock-absorbing cylinder. A left partition and a right partition are arranged on both sides of the middle partition. A left chamber and a right chamber are formed on both sides of the middle of the shock-absorbing cylinder respectively. The shock-absorbing rubber is correspondingly matched and nested in the left chamber and the right chamber. A connecting hole is arranged in the middle of the left partition and the right partition. The inner end of the connecting rod passes through the connecting hole and is fixedly connected to the shock-absorbing rubber. The connecting rods extending outward on both sides are fixedly connected to the main base and the secondary base respectively.

5. The foundation structure in housing construction according to claim 1, characterized in that: The connecting beam is a telescopic and adjustable structure, a mounting hole is arranged at the end of the connecting beam, a mounting head is arranged on the upper part of the peripheral column, and the mounting head is fixedly sleeved in the mounting hole.

6. A foundation construction method in housing construction, using the foundation structure in housing construction according to claim 1, characterized in that: The following steps are included: Step 1: Excavate the foundation pit on the original soil layer First, the site is leveled, and then the lines are laid out. The original soil layer is excavated and supported by a hollow island excavation method to form a foundation pit structure; Step 2: Fill the base layer Fill the foundation cushion into the foundation pit and compact it. Determine the main node position according to the drawing position, and then open a cross-shaped embedded groove at the main node position. After the embedded groove construction is completed, the lower half of the cross-shaped cross seat is matched and placed in the embedded groove, and the upper half is exposed on the upper part of the foundation cushion, with the center located or suspended above the foundation cushion; Step 3: Secure the cross seat Inject mortar into the interior through the injection port of the cross seat, fill the interior of the cross seat with mortar, and discharge the mortar from the discharge port to ensure that the mortar fills the embedding groove, so that the cross seat and the embedding groove are firmly connected; Step 4: Fill the first bearing layer Pour the first bearing layer material into the foundation pit and cover the main pile system, then compact it, dig a groove on the upper surface of the compacted first bearing layer, and fix the cross seat in the groove in the same way as in step three; Step 5: Fill the second bearing layer Pour the second bearing layer material into the foundation pit and cover the main pile system, then compact it, dig a groove on the upper surface of the compacted second bearing layer, and fix the cross seat in the groove in the same way as in step three; Step 6: Construction of main piles and secondary piles During the installation construction nodes, the main piles, reinforcement piles and secondary piles are drilled and anchored in sequence on the main body of the foundation. The main piles and reinforcement piles penetrate the middle of the central column and the peripheral column respectively, and the secondary piles are directly anchored on the main body of the foundation. Step 7: Stabilize the main base and the secondary base Fix the main base to the upper part of the main piles and the reinforcement piles, fix the secondary base to the upper part of the secondary piles, and then connect the shock-absorbing rod between the main base and the secondary base; finally, construct the main building body on the upper part of the main base and the secondary base.

7. The foundation structure in housing construction according to claim 1, characterized in that: The filling material of the foundation cushion layer is crushed stone and stone powder in a mass ratio, the filling material of the first bearing layer is graded sand, and the second bearing layer is clay.

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