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CN-115928781-A - Foundation leveling method for building construction

CN115928781ACN 115928781 ACN115928781 ACN 115928781ACN-115928781-A

Abstract

The invention provides a leveling method of a foundation for building construction, and belongs to the technical field of building construction. The method comprises the following steps: calculating the stability of the natural foundation soil according to the building construction design requirement; calculating the shear strength index of the composite foundation pile according to the building construction design requirement; and (5) carrying out foundation pit excavation construction according to the designed foundation type. The foundation leveling method for building construction provided by the invention can quickly and effectively calculate the stability of natural foundation soil, so that different composite foundations can be selected for different natural foundation soil, the foundation soil can generate pore water pressure under the action of an earthquake, the pore water pressure is generated quickly and disappears slowly on the natural foundation, the shearing resistance of the soil is weakened greatly, and the anti-slip stability of the foundation soil is extremely unfavorable.

Inventors

  • HU YUEJUN
  • LAI CHUNHUI
  • Duan Fengzhu
  • XIA WEIYI

Assignees

  • GUANGDONG LONGYUE CONSTRUCTION ENG CO LTD

Dates

Publication Date
20230407
Application Date
20221209
Priority Date
20221209

Claims (8)

  1. 1. A foundation leveling method for building construction is characterized by comprising the following steps: calculating the stability of the natural foundation soil according to the design requirement of building construction; calculating the shear strength index of the composite foundation pile according to the design requirement of building construction; performing foundation pit excavation construction according to the type of a designed foundation; carrying out panel installation according to the hanging line construction of the position of the excavated foundation pit; carrying out plane arrangement on the composite foundation piles in the foundation pit; carrying out soil filling operation; and finally, laying the lacing wires.
  2. 2. The method for leveling the foundation for building construction according to claim 1, wherein the stability of the natural foundation soil is calculated according to the building construction design requirements by the following steps: firstly, determining a damage mechanism and a damage criterion of foundation soil; and calculating the stability of the foundation soil according to the failure mechanism and the failure criterion.
  3. 3. The method for leveling the foundation for use in building construction according to claim 2, wherein the step of calculating the stability of the foundation soil is as follows: calculating the gradient by taking the average gradient of the bedrock under the whole foundation as the calculated gradient; taking soil with unit width along the longitudinal direction of the building according to the plane strain problem as a calculation unit; calculating a stable safety factor without considering the earthquake action; and (4) calculating a stable safety factor by considering the earthquake action.
  4. 4. The method as claimed in claim 1, wherein the installation of the panels is performed by hanging the panels at the predetermined positions, and the panels are stably installed while maintaining the vertical and horizontal positions of the wall panels, and the joints between the panels at the lowest floor and the foundation are preferably constructed by grouting or dowel fastening.
  5. 5. The method as claimed in claim 1, wherein the composite foundation piles are arranged in a plane in the form of columns, walls, grids, blocks, etc. according to the characteristics of the upper structure, on the basis of the maximum distance between piles and the convenience of construction.
  6. 6. The method of claim 1, wherein the filling construction is performed by filling in a vertical direction, and performing a precise horizontal pushing and filling; filling soil is filled and rolled layer by layer to ensure that the filling material is compacted and molded at the optimal water content; the rolling sequence is to start from the middle part of the lacing wire and be parallel to the direction of the wall panel, then turn to the tail part and roll towards the direction of the floor panel gradually.
  7. 7. The method for leveling the foundation for building construction according to claim 1, wherein the tie bar laying is divided into: laying steel plate tie bars, laying reinforced concrete slab tie bars and laying steel bar-through plain concrete block tie bars.
  8. 8. The method for smoothing the foundation for building construction according to claim 7, wherein the steel tie bars are laid: after the wall panels are assembled and filled with soil to the reinforcement resistant positions, leveling the surface of the filled soil, and laying the bent steel plate lacing wires after straightening and leveling the steel plate lacing wires by using the filled soil; after the tie bars are connected with the embedded parts of the wall panel, soil is backfilled on the tie bars, but the tie bars and the soil are kept in close contact in the surface direction; laying a reinforced concrete slab lacing wire: as mentioned above, the tie bars and the surface of the filling are required to be closely attached, and if the tie bars and the surface of the filling are not closely attached, sand cushion leveling can be carried out; the connection between the lacing bar and the wall panel should be kept straight as much as possible and cannot be distorted, and the position should meet the design requirement; and (3) putting the steel bars into plain concrete blocks, and stretching and laying: firstly, the reinforcing steel bars are placed in the preformed holes of the road slab, placed according to the designed positions, combined with all the plain concrete precast blocks and then connected with the embedded parts on the wall slab, and the reinforcing steel bars are required to be closely attached to the surface of the filled earth.

Description

Foundation leveling method for building construction Technical Field The invention relates to the field of building construction, in particular to a method for leveling a foundation for building construction. Background The foundation refers to soil or rock mass of a supporting foundation under a building; soil layers serving as building foundations are divided into rocks, gravel soil, sandy soil, silt soil, cohesive soil and artificial filling soil; the foundation includes natural foundation and artificial foundation (composite foundation); the natural foundation is a natural soil layer which does not need to be reinforced by people; the artificial foundation needs reinforcement treatment by people, and a stone chip cushion, a sand cushion, mixed lime-soil backfill, tamping and the like are common; the natural foundation can meet the requirement of bearing all loads of the foundation in a natural state, a natural soil layer reinforced by people is not needed, the engineering cost is saved, and the foundation does not need manual treatment; the natural foundation is a natural soil layer which can be directly placed on the foundation without treating the foundation; there are four major categories: rock, gravel soil, sandy soil and cohesive soil. Artificial foundation: a foundation that has been artificially treated or improved; when the geological condition of the soil layer is better and the bearing capacity is stronger, a natural foundation can be adopted; under the condition of poor geological conditions, such as sloping fields, sandy fields or silt geology, or when the texture of the soil layer is good but the upper load is too large, in order to ensure that the foundation has enough bearing capacity, the foundation is artificially reinforced, namely the artificial foundation. At present, when houses built on a leveling field are large in number of layers and heavy in weight, slippage settlement damage can be caused, or slippage damage can be caused under the action of an earthquake, but most foundation leveling methods cannot quickly and effectively calculate the stability of natural foundation soil at present, so that different composite foundations cannot be selected for different natural foundation soil to improve the stability of buildings. How to invent a method for leveling the foundation for building construction to improve the problems becomes a problem to be urgently solved by the technical personnel in the field. Disclosure of Invention In order to make up for the defects, the invention provides a foundation leveling method for building construction, aiming at solving the problem that different composite foundations cannot be selected according to the stability of natural foundation soil. The invention is realized in the following way: the invention provides a method for leveling a foundation for building construction, which comprises the following steps: calculating the stability of the natural foundation soil according to the design requirement of building construction; calculating the shear strength index of the composite foundation pile according to the building construction design requirement; carrying out foundation pit excavation construction according to the designed foundation type; carrying out panel installation according to the hanging line construction of the position of the excavated foundation pit; carrying out plane arrangement on the composite foundation piles in the foundation pit; carrying out soil filling operation; and finally, laying the lacing wires. Preferably, the stability of the natural foundation soil is calculated according to the building construction design requirements, and the calculation steps are as follows: firstly, determining a damage mechanism and a damage criterion of foundation soil; and calculating the stability of the foundation soil according to the failure mechanism and the failure criterion. Preferably, the stability of the foundation soil is calculated by the following steps: taking the average gradient of the bedrock under the whole foundation as a calculated gradient; taking soil with unit width along the longitudinal direction of the building according to the plane strain problem as a calculation unit; calculating a stable safety factor without considering the earthquake action; and (4) calculating a stable safety factor by considering the earthquake action. Preferably, the panel installation must be according to the position hanging line construction of design regulation, should lay steadily, keeps the vertical and horizontal position of shingle nail, and the lower floor's panel should be with the firm construction of foundation grout or dowel. Preferably, the composite foundation pile may be arranged in a plane in the form of a column, a wall, a lattice, a block, etc. according to the characteristics of the upper structure, on the basis of maximizing the pile spacing and facilitating construction. Preferably, the filling construction should