CN216075059U - Silt basic unit building engineering consolidates foundation structure - Google Patents

Abstract

The utility model belongs to the technical field of foundation engineering, and particularly relates to a sludge foundation layer building engineering reinforced foundation structure; large-particle-size stone layers and graded broken stone layers are sequentially paved in a foundation pit formed after the upper hard soil layer is dug, broken stone aggregates are filled in gaps among the stones in the large-particle-size stone layers, the top surface of the graded broken stone layers is leveled to the designed elevation of the foundation, and a concrete cushion layer is paved on the graded broken stone layers. The utility model provides a sludge base layer building engineering reinforced foundation structure, which adopts a stone-throwing and silt-squeezing mode to treat a building foundation, and compared with other foundation treatment schemes, the structure has the following technical effects: 1. the quality is stable and reliable, the construction speed is fast, the construction period is short, and the influence of weather and other external factors is small. 2. Convenient and fast, the cost is lower. 3. The construction site is civilized, and the influence on the surrounding environment is small because the site does not relate to a large amount of manpower, cement materials, large-scale mechanical equipment and the like.

Description

Silt basic unit building engineering consolidates foundation structure

Technical Field

The utility model belongs to the technical field of foundation engineering, and particularly relates to a sludge foundation layer building engineering reinforced foundation structure.

Background

For a base course with high underground water level and silt as base soil, the current treatment mode is as follows: excavating to below the water level elevation, performing dewatering and draining treatment, and then filling and replacing the graded sandstone cushion layer, wherein the compaction coefficient is not less than 0.97, and the bearing capacity characteristic value after filling and replacing is not less than 200 kPa. By adopting the construction process, the functional requirements can be met after construction, but the construction period is long, the construction investment is large, the total construction period is influenced, and the construction cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.

In order to achieve the purpose, the utility model provides a sludge-based building engineering reinforced foundation structure, wherein a large-particle-size stone block layer and a graded broken stone layer are sequentially paved in a foundation pit formed by excavating an upper hard soil layer from bottom to top, broken stone aggregate is filled in gaps among the stone blocks in the large-particle-size stone block layer, the top surface of the graded broken stone layer is leveled to the designed elevation of the foundation, and a concrete cushion layer is paved on the graded broken stone layer.

Furthermore, the particle size of the stones in the large-particle-size stone layer is 30-40 cm, and the particle size of the stones in the graded broken stone layer is less than 10 cm.

Furthermore, the large-particle-size block stone layer comprises a first large-particle-size block stone layer and a second large-particle-size block stone layer which are formed by layered filling and rolling.

Furthermore, the paving distance of the stones in the first layer of large-particle-size stone blocks is 10 cm.

Further, the particle size of the crushed stone aggregate is less than 5 cm.

Compared with the prior art, the utility model has the advantages that:

the utility model provides a sludge base layer building engineering reinforced foundation structure, which adopts a stone-throwing and silt-squeezing mode to treat a building foundation, and compared with other foundation treatment schemes, the structure has the following technical effects: 1. the quality is stable and reliable, the construction speed is fast, the construction period is short, and the influence of weather and other external factors is small. 2. Convenient and fast, the cost is lower. 3. The construction site is civilized, and the influence on the surrounding environment is small because the site does not relate to a large amount of manpower, cement materials, large-scale mechanical equipment and the like.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1-a first large-particle-size block stone layer; 2-crushed stone aggregate; 3-a second large-particle-size block stone layer; 4-graded crushed stone layer; and 5-concrete cushion layer.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

As shown in fig. 1; a large-particle-size stone layer and a graded broken stone layer 4 are sequentially paved in a foundation pit formed after an upper hard soil layer is dug, broken stone aggregates 2 are filled in gaps among the stones in the large-particle-size stone layer, and the particle size of the broken stone aggregates 2 is smaller than 5 cm. The top surface of the graded broken stone layer 4 is leveled to the designed elevation of the foundation, and a concrete cushion layer 5 is paved on the graded broken stone layer 4.

The particle size of the stones of the large-particle-size stone layer is 30-40 cm, the particle size of the stones of the graded broken stone layer 4 is less than 10cm, and a large-particle-size stone mixture and a small-particle-size stone mixture with particle sizes less than 10cm are adopted. The large-particle-size block stone layer comprises a first large-particle-size block stone layer 1 and a second large-particle-size block stone layer 3 which are formed by layered throwing, filling and rolling. The paving distance of the stones of the first large-particle-size stone layer 1 is 10 cm.

The underground water level of the construction area of the applicant construction project is high, a large area of mucky soil layer can be seen after foundation earthwork is excavated, due to the fact that the compression property of silt is large, the sensitivity is high, the silt is subjected to comprehensive technological economic comparison, comprehensive factors such as a construction period are considered, and after the unit site reconnaissance such as design, construction, supervision and reconnaissance is carried out, the silt replacing construction treatment is adopted, the structure is that a certain amount of rock blocks with certain grain sizes are thrown into silt or a silty foundation to be treated, and the silt at the original foundation is compacted, so that the purpose of reinforcing the foundation is achieved.

1. Preliminary tests

Before the riprap replacing and filling treatment of the foundation with high water level and large soil water content, riprap replacing and filling are carried out on a typical section, a foundation bearing capacity test is carried out by a third party, and after a test report is confirmed to be qualified, subsequent construction work is carried out.

2. Construction preparation and measurement pay-off

Before construction, cleaning a concrete block foundation of an original building excavated in a foundation pit, laying a construction access road on a soft soil layer by using a steel plate, preparing a loader, an excavator and a road roller for construction in advance, preparing block stones in place, and setting a measuring elevation line; the method comprises the steps of firstly excavating the upper hard layer soil, after an excavation contour line and an original ground measurement result are checked by a supervisor to be correct, excavating construction can be carried out, leveling is carried out along with excavation in the excavating process, the excavation elevation of the bottom of a foundation is measured in time, and the phenomena of underexcavation and overexcavation are prevented.

3. Basic upper layer cleaning

After the upper hard soil layer of the stone-throwing surface is dug, measuring personnel cooperate with the excavator to clean the foundation surface.

4. Layered riprap

4.1 throw the first layer of large-grain-size stone block and roll and pave

Paving the large stones in a mode of combining an excavator and manpower, wherein the stones are uniformly paved, and gaps of about 10cm are reserved among the stones; the method comprises the steps of firstly pressing stones into sludge by using an excavator bucket, then rolling by using the excavator, caulking aggregate and adopting unscreened broken stone and crushed slag.

4.2 throw the second layer of large-grain-size block stone and roll and pave

And laying the second layer of large-particle-size rock blocks according to the first layer of laying mode. Utilize the excavator fill to impress during the silt of the stone of rising after the riprap is accomplished, then arrange with the excavator and press 3 times, ensure that the stone is all pressed into during the silt, the aggregate caulking adopts the broken stone disintegrating slag that does not sieve. And (3) arranging a measuring point on the site, measuring the elevation of the measuring point, and ensuring that the settlement of the last time is less than 3 cm.

4.3 polishing grading stone layer

The graded broken stone layer is fully paved, and blocks with different grain sizes below 10cm are adopted, and the paving thickness is about 20 cm. After the stone is thrown, an excavator is adopted to preliminarily roll for 1 time, and then a road roller (vibration roller) is used to continuously roll for 5 times, wherein the settlement amount is controlled within 10 mm.

5. Concrete paving cushion

6. Foundation bearing capacity test

And after the replacement and filling are finished, units such as supervision, construction and the like carry out site survey, and a third party detection unit carries out bearing capacity test detection and compactness detection on the foundation after the replacement and filling is finished, so that the compactness after the replacement and filling is not less than 0.97 and the characteristic value of the bearing capacity is not less than 200 Kpa.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. The utility model provides a silt basic unit building engineering consolidates foundation structure which characterized in that: big particle size stone layer, graded gravel layer (4) have been laid in proper order from the bottom up in the foundation ditch that upper hard soil layer dug the back and form, and the gap between the stone in the big particle size stone layer is filled with rubble aggregate (2), and the top surface of graded gravel layer (4) is leveled, reaches the ground design elevation, and the higher authority of graded gravel layer (4) is laid concrete bed course (5) in a parallel way.

2. The sludge-based housing construction engineering reinforced foundation structure of claim 1, wherein: the particle size of the stones of the large-particle-size stone layer is 30-40 cm, and the particle size of the stones of the graded broken stone layer (4) is less than 10 cm.

3. The sludge-based housing construction engineering reinforced foundation structure of claim 2, wherein: the large-particle-size block stone layer comprises a first large-particle-size block stone layer (1) and a second large-particle-size block stone layer (3) which are formed by layered filling and rolling.

4. The sludge-based housing construction engineering reinforced foundation structure of claim 3, wherein: the paving distance of the stones in the first large-particle-size stone layer (1) is 10 cm.

5. The sludge-based housing construction engineering reinforced foundation structure of claim 4, wherein: the particle size of the broken stone aggregate (2) is less than 5 cm.

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