CN216712980U - A kind of reinforcement treatment structure of deep soft soil foundation combined with concrete lattice wall and bulk material piles - Google Patents

Abstract

The utility model provides a deep soft soil foundation reinforcement treatment structure in which a concrete lattice wall and a bulk material pile are combined, wherein transverse and longitudinal orthogonal reinforced concrete lattice walls are arranged on the deep soft soil foundation; The center of the frame is arranged with gravel piles or sand piles and other scattered material piles; the bottom of the concrete lattice wall and the scattered material piles are located on the dense layer or weathered bedrock at the bottom of the soft foundation; the top of the concrete lattice wall and the scattered material piles Arrange horizontal permeable cushions. Aiming at the conditions of deep soft soil foundation, the utility model strengthens the soft soil foundation by rationally utilizing the rigid reinforcement structure and the flexible reinforcement body, and at the same time accelerates the drainage and consolidation of the foundation soft soil, improves its own strength and creates conditions for reinforcement treatment measures and methods, so as to realize the soft soil foundation. The strength, bearing capacity and deformation modulus of the soil foundation meet the requirements of the superstructure and buildings. It is of great significance to the deep soft soil foundation treatment technology under complex conditions.

Description

A kind of reinforcement treatment structure of deep soft soil foundation combined with concrete lattice wall and bulk material piles

technical field

The utility model relates to the technical fields of construction, municipal administration and water conservancy engineering, in particular to a deep soft soil foundation reinforcement treatment structure combined with a concrete lattice wall and a bulk material pile.

Background technique

The construction of heavy-loaded structures and buildings on deep soft soil foundations is an engineering and technical problem often encountered in the fields of construction, municipal and water conservancy projects. Often, the strength, bearing capacity and deformation modulus of soft soil foundations cannot meet the requirements of stability and stability. Deformation control is required, so foundation reinforcement measures must be taken to ensure the stability, safety and normal use of structures and buildings. For soft soil foundation, there are various treatment methods in the project, such as direct excavation, pile foundation treatment, pre-compression consolidation drainage, grouting, dynamic compaction, etc. According to the characteristics of soft soil, different methods have their own applicability and limitation. The use of reinforced concrete walls can directly improve the strength and bearing capacity of the foundation by using the rigid concrete structure, but it cannot provide drainage channels for the deep soft soil, so it is difficult to use the later strength of the soft soil consolidation.

Utility model content

The purpose of the present utility model is to provide a structure combining the rigid reinforcement structure of concrete lattice wall and the flexible reinforcement of bulk material piles, aiming at the difficult problem of reinforcement treatment of deep soft soil foundation, so as to realize the improvement of foundation strength, bearing capacity and deformation control. Require. The above-mentioned purpose of the present utility model is achieved through the following technical solutions:

A deep soft soil foundation reinforcement treatment structure combined with concrete lattice walls and bulk material piles is applied to the reinforcement treatment of deep soft soil foundations to meet the bearing capacity requirements of an upper heavy load structure or a building under the action of high additional stress, It is characterized by:

Set up transverse and longitudinal orthogonal reinforced concrete lattice walls on the deep soft soil foundation;

Arrange scattered material piles such as gravel piles or sand piles in the center of the concrete lattice wall frame;

The concrete lattice wall and the bottom of the bulk material pile are located on the dense layer or weathered bedrock at the bottom of the soft foundation;

The concrete lattice wall and the top of the scattered material piles are arranged with a horizontal permeable cushion; the horizontal permeable cushion and the scattered piles together form a horizontal and vertical foundation soft soil consolidation drainage channel to accelerate the consolidation of the soft foundation, and the horizontal cushion can Homogenize the settlement and deformation of the weak foundation caused by the upper building load to avoid uneven settlement of the foundation.

Further, the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are arranged in a square orthogonal arrangement, the frame size is 2.5m~3.5m, the wall thickness is 0.8m~1.2m, the strength grade is not lower than C25, and the concrete reinforcement ratio is set by The structural force calculation is determined. Further, the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are generally constructed in the same length, regardless of the structural joints. Make sure the nodes are firmly connected.

Further, the scattered material piles are arranged in the central part of the concrete lattice wall frame, and the immersed pipe gravel piles or sand piles are used, and the vibratory piles should not be used. The diameter of the piles is 0.8m to 1.0m.

Further, the horizontal permeable cushion is generally made of gravel or pebbles. If the foundation has the requirement of reverse filtration protection, artificial sand can be used. The gradation of artificial sand is determined by the reverse filtration criterion, and the thickness of the cushion is generally 1.0m to 3.0m.

Further, for the horizontal cushion with a thickness of more than 1m, from the perspective of convenient construction, the concrete lattice wall and the bulk material pile can be constructed in two phases before and after the construction.

The utility model adopts the rigid reinforcement structure and the flexible reinforcement to jointly reinforce the soft soil foundation by arranging the transverse and longitudinal concrete lattice walls, the scattered material piles and the horizontal permeable cushion in the deep soft soil foundation. The drainage channel creates conditions for the consolidation of the soft soil, accelerates the drainage and consolidation of the soft soil, and makes full use of the late strength of the soft soil, thereby improving the strength, bearing capacity and deformation modulus of the soft soil foundation, so as to meet the requirements of the superstructure and buildings to the foundation. Require. In addition, the high modulus of the horizontal cushion layer can equalize the additional stress of the foundation caused by the upper load, which is beneficial to control the uneven deformation of the foundation.

Aiming at the conditions of deep soft soil foundation, the utility model strengthens the soft soil foundation by rationally utilizing the rigid reinforcement structure and the flexible reinforcement body, and at the same time accelerates the drainage and consolidation of the foundation soft soil, improves its own strength and creates conditions for reinforcement treatment measures and methods, so as to realize the soft soil foundation. The strength, bearing capacity and deformation modulus of the soil foundation meet the requirements of the superstructure and buildings. It is of great significance to the deep soft soil foundation treatment technology under complex conditions.

Description of drawings

FIG. 1 is a plan view of the reinforcement treatment structure of a deep soft soil foundation combined with a concrete lattice wall and a bulk material pile according to the present invention.

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 .

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

Referring to Figures 1 and 2, the utility model provides a deep soft soil foundation reinforcement treatment structure combined with a concrete lattice wall and a bulk material pile, which is applied to the reinforcement treatment of deep soft soil foundations, and the depth of soft soil foundations generally does not exceed 40m , its strength and bearing capacity cannot meet the requirements of the superstructure and buildings; in Figure 1, the reference numeral 100 is the deep soft soil, and the reference numeral 200 is the soft soil compact layer or the boundary of the weathered bedrock; the deep soft soil of the present utility model The soil foundation treatment structure mainly includes the following parts:

The deep soft soil foundation treatment structure is composed of a transverse reinforced concrete lattice wall 1, a longitudinal reinforced concrete lattice wall 2, a bulk material pile 3, a top horizontal permeable cushion 4 and the like. The transverse concrete lattice wall 1 and the longitudinal concrete lattice wall 2 are arranged orthogonally in a square shape, the frame size is 2.5m~3.5m, the wall thickness is 0.8m~1.2m, the strength grade is not lower than C25, and the concrete reinforcement ratio is determined by the structure. The force calculation is determined, the transverse wall and the longitudinal wall are generally constructed in the same length, regardless of the structural joints, the transverse and longitudinal steel bars at the intersection joints penetrate each other, the transverse steel bars pass through the longitudinal wall 2, and the longitudinal steel bars pass through the transverse wall 1 to ensure that the joints are firm. Connection; scattered material piles 3 are arranged in the center of the frame of the concrete lattice wall, and should be carried out 28 days after the concrete construction of the frame. Generally, immersed pipe gravel piles or sand piles are used, and vibrating piles should not be used. The diameter of the pile is 0.8m ~ 1.0m; the scattered material piles between the frames should be constructed in sequence and interpolated and densified; the top horizontal permeable cushion 4 is generally made of gravel or pebbles. If the foundation requires anti-filtration protection, artificial sand can be used. The gradation of artificial sand is determined by the reverse filtration criterion. The thickness of the cushion layer is generally 1.0m to 3.0m. For the horizontal cushion layer with a thickness of more than 1m, from the perspective of convenient construction, the concrete lattice wall and the bulk material pile should be laid before the construction. A layer of horizontal permeable cushion layer (named as early-stage permeable cushion layer 41) is used as leveling and bedding. After foundation treatment is completed, the remaining horizontal permeable cushion layer (named as later-stage permeable cushion layer 42) is laid to the design thickness.

The above-mentioned concrete lattice wall and bulk material pile combination of deep soft soil foundation reinforcement treatment structure can be realized by the following construction methods:

1) First lay a layer of gravel or sandstone horizontal cushion (pre-permeable cushion 41) on the upper part of the soft soil foundation, with a thickness of 0.5m to 1.5m, as the leveling and bedding of the construction site, and also as the soft soil consolidation during the construction period Surface drainage channels;

2) After the permeable cushion layer 41 is laid in the early stage, the concrete lattice wall construction is carried out. Horizontal and vertical reinforced concrete lattice walls 1 and 2 should be constructed alternately to facilitate the stability during construction;

3) After the construction of the concrete lattice wall is completed, the construction of the bulk material pile 3 is carried out in the center of the frame of the lattice wall. The construction of the bulk material pile 3 should be carried out 28 days after the concrete construction of this sash. And the scattered material piles between the frames should be constructed in sequence and interpolated and encrypted;

4) After completing the construction of the lattice wall and the bulk material piles, clean up the contaminated parts of the upper surface layer of the previously laid cushion, and then carry out the remaining permeable cushion layer by layer rolling and filling to the design thickness, and the rolling layer thickness The gravel shall not exceed 80cm, and the sand shall not exceed 60cm;

5) After the horizontal permeable cushion is laid, the construction of the superstructure and the building shall be carried out.

The above-mentioned specific embodiments are used to explain the present utility model, and are only preferred embodiments of the present utility model, rather than limiting the present utility model. Within the spirit of the present utility model and the protection scope of the claims, any Modifications, equivalent replacements, improvements, etc., all fall within the protection scope of the present invention.

Claims (4)

1. The utility model provides a deep soft soil foundation reinforcement processing structure of concrete lattice wall and discrete material stake combination which characterized in that:

arranging a reinforced concrete lattice wall which is transversely and longitudinally orthogonal in the deep soft soil foundation;

arranging a discrete material pile in the center of a frame of the concrete lattice wall;

the concrete lattice wall and the bottom of the discrete material pile are located on a dense layer at the bottom of the soft foundation or weathered bedrock;

arranging a horizontal permeable cushion layer on the top of the concrete lattice wall and the discrete material pile; the horizontal permeable cushion layer and the discrete piles form a horizontal and vertical foundation soft soil consolidation drainage channel together.

2. The deep soft soil foundation reinforcement structure of concrete lattice wall and discrete material pile combination of claim 1, characterized in that: the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are in square orthogonal arrangement, the size of the lattice is 2.5-3.5 m, the wall thickness is 0.8-1.2 m, and the strength grade is not lower than C25.

3. The deep soft soil foundation reinforcement structure of concrete lattice wall and discrete material pile combination of claim 1, characterized in that: the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are constructed in a through length mode, and structural joints are not divided: the crossed joint parts of the transverse reinforced concrete lattice wall and the longitudinal reinforced concrete lattice wall are transversely penetrated through the longitudinal steel bars, so that the joint parts are firmly connected.

4. The deep soft soil foundation reinforcement structure of concrete lattice wall and discrete material pile combination of claim 1, characterized in that: if the basic soft soil has the reverse filtration protection requirement, the horizontal permeable cushion layer adopts artificial sand, and the gradation is determined by the reverse filtration criterion.

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