CN218622201U - Hidden reinforced structure system of existing friction pile - Google Patents

Abstract

The utility model discloses a reinforcing structure system of existing friction pile. The utility model discloses make full use of the residual strength of existing friction pile, provided one kind to the hidden reinforced structure system of existing friction pile to the integrated configuration that new friction pile and existing friction pile formed improves overall structure horizontal resistance. The reinforced structure system comprises the existing anti-slide piles, newly-added anti-slide piles, connecting beams and crown beams. The newly-increased friction pile is located one side that the face was kept away from to existing friction pile, and newly-increased friction pile vertically inserts the soil layer and its buried depth is greater than the buried depth of existing friction pile. The connecting beam is positioned at the pile top, the pile tops of the adjacent newly-increased slide-resistant piles are fixedly connected by the crown beam, and the connecting beam and the crown beam integrate the new slide-resistant pile and the old slide-resistant pile. Through calculation, the newly-added slide-resistant piles bear more landslide thrust, and the rest horizontal thrust is transmitted to the existing slide-resistant piles through the connecting beams, so that the existing slide-resistant piles and the newly-added slide-resistant piles are stressed in a coordinated mode. The aim of hiding the new slide-resistant piles is achieved by filling and burying the tops of the newly added slide-resistant piles. Therefore, the reinforcing method of hiding the new slide-resistant pile by using the existing slide-resistant pile and connecting by using the connecting beam has great economic value and practical value.

Description

A Concealed Reinforcement Structure System of Existing Anti-slide Pile

technical field

The utility model relates to the technical field of secondary reinforcement of conventional pile foundations, in particular to a structural system for reinforcing existing anti-slide piles which hides new anti-slide piles and connects with connecting beams.

Background technique

At present, domestic pile foundations are widely used for reinforcement and protection of slopes, dangerous terrain or buildings. However, under the influence of natural disasters or human factors, some existing anti-slide piles may be damaged or deformed, which cannot meet the needs of use. In order to avoid serious accidents, it is necessary to take reinforcement measures for the existing anti-slide piles that have been damaged or deformed. There are two main ways to strengthen the existing anti-slide piles in my country: the first method is to re-arrange new anti-slide piles at a certain distance from the front or rear of the existing anti-slide piles to support the rock and soil mass of the slope ; The second method is to reinforce the existing anti-slide piles by laying anchor rods, supporting piles or other methods.

For example, the Chinese patent whose authorized notification number is CN110284723A discloses a composite structure and construction method of hollow piles on the periphery of existing piles. The combined structure includes a hollow pile with a pile body and a surrounding sleeve, wherein the hollow pile contains a plurality of pile sections, and each pile section is composed of prefabricated arc-shaped pile sheets that are one-third of the circumference. The assembled hollow piles are spliced in the direction of the central axis, and are gradually pressed into the soil by static pressure. After all the pressing is completed, grouting is used to reinforce the soil in the hollow pile and between the pile and the existing pile. The combined structure makes the existing pile body, the peripheral hollow pile and the upper cap form an integral structure, which has a good common bearing capacity, which not only strengthens the existing pile, but also provides technical support for the development of the space under the existing building.

At present, most of the reinforcement technologies for existing piles are based on the existing anti-slide piles that have reached a certain degree of damage, and the residual strength cannot be used or fully utilized, and the reinforcement process is complicated and the construction period is long. Restricted by geological conditions and engineering overview. In fact, most of the existing piles have not suffered major damage or only slightly deformed, and their structural characteristics can still continue to meet or can meet the structural use requirements after taking reinforcement measures. But so far, there are few clear reinforcement methods or structural systems about utilizing the residual strength of existing anti-slide piles.

Utility model content

The utility model mainly overcomes the deficiencies in the prior art, and aims to provide a reinforcement method for existing anti-sliding piles that does not damage the pile itself much and still retains a certain strength. The utility model not only makes full use of the residual strength of the existing anti-sliding piles, but the combined structure formed with the new anti-sliding piles can increase the overall strength, reduce the internal force and deformation of the structure, and can also reduce the engineering cost and construction time.

In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

A hidden reinforcement structure system of existing anti-slide piles, including existing anti-slide piles, new anti-slide piles, tie beams and crown beams. The newly added anti-slide piles are located on the side of the existing anti-slide piles away from the air surface, vertically inserted into the soil layer and buried deeper than the existing anti-slide piles. Old anti-slide piles form the overall structure. It can be seen from the stress of the double row of anti-slide piles that the newly added anti-slide piles bear most of the horizontal thrust, and the connecting beam transmits the remaining small part of the horizontal thrust to the existing anti-slide piles, so that the existing anti-slide piles , Newly added anti-slide piles for coordinated force bearing.

Preferably, the tie beam is located at the top of the pile, and crown beams are fixedly connected between the pile tops of adjacent newly added anti-slide piles, and the tie beam and the crown beam make the old and new anti-slide piles integral.

By adopting the above-mentioned technical scheme, it is ensured that the connecting beam and the crown beam form an integral structure of new and old anti-slide piles, which increases the strength while making full use of the residual strength of the existing anti-slide piles, and facilitates operation and construction.

Preferably, the connecting beams are respectively perpendicular to the existing anti-slide piles and the new anti-slide piles.

Preferably, the tie beams are fixedly connected to the existing anti-slide piles and the new anti-slide piles by planting bars.

Preferably, the position of the retaining plate remains unchanged, and is still between the existing anti-slide piles.

Preferably, the newly added anti-slide piles are vertically inserted into the soil layer, and the burial depth thereof is greater than that of the existing anti-slide piles.

Preferably, the newly added anti-slide piles are located on the side of the existing anti-slide piles away from the free surface.

Preferably, the minimum distance between the new anti-slide piles and the original anti-slide piles is 1m, the maximum distance between the new anti-slide piles and the original anti-slide piles is 1.8m, and the distance between the new anti-slide piles is 5m.

By adopting the above technical scheme, it is ensured that the newly added anti-slide piles can bear more landslide thrust, and the remaining part of the horizontal thrust is transmitted to the existing anti-slide piles through the connecting beam, which can not only make the existing anti-slide piles and the new anti-slide piles The piles cooperate to bear force, which can also simplify the construction and facilitate the operation.

Preferably, the newly added anti-slide piles are connected with the existing anti-slide piles in a staggered manner.

By adopting the above technical solution, the area occupied by the newly added anti-slide piles is reduced, and the strength and stability of the overall structure are also greatly improved.

Preferably, the new anti-slide piles are concealed by filling the tops of the newly added anti-slide piles with soil.

By adopting the above technical scheme, the overall structure is simple and beautiful.

Beneficial effect:

Compared with the prior art, the utility model has the following beneficial effects:

(1) The strength of existing anti-slide piles is fully utilized, which can reduce construction costs.

(2) The newly added anti-slide piles are located behind the existing anti-slide piles and have a deeper buried depth. According to the calculation of the double-row anti-slide piles, the newly added anti-slide piles bear most of the thrust of the landslide, ensuring that the existing anti-slide piles can bear part of the thrust without continuing to damage or deform;

(3) The newly added anti-slide piles and the existing anti-slide piles constitute the overall structure, that is, the existing anti-slide piles and the newly added anti-slide piles work together to increase the overall horizontal resistance and reduce the internal force and deformation of the overall structure. The bearing capacity and deformation resistance of the pile are better;

(4) The hidden structure is more in line with the aesthetic requirements and reduces the impact on the natural landscape;

(5) Ensuring sufficient width on the side away from the landslide's air-facing surface, which can provide a place for entertainment and leisure, and improve the utilization rate of the land.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural top view of the utility model;

Fig. 3 is the example figure of the utility model;

Explanation of reference signs: in the figure, 1 is the existing anti-slide pile, 2 is the newly added anti-slide pile, 3 is the retaining plate, 4 is the connecting beam, 5 is the soil body, 6 is the crown beam, and 7 is the slope line , 8 is the ground.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and examples.

See Figure 1, a hidden reinforcement structure system of existing anti-slide piles, including existing anti-slide piles, new anti-slide piles, tie beams and crown beams. The connecting beam 4 and the crown beam 6 are located at the top of the pile, and the crown beam 6 is fixedly connected between the pile tops of the adjacent newly added anti-slide piles. The sliding piles 2 are fixedly connected by planting bars, and the connecting beams are perpendicular to the existing anti-sliding piles and the newly added anti-sliding piles. The position of the retaining plate 3 remains unchanged. The distance between the newly-added anti-slide pile 2 and the original anti-slide pile 1 is 1.0-1.8m, and the distance between adjacent newly-added anti-slide piles is 2-5 times the diameter of the newly-added anti-slide pile. The newly added anti-slide pile 2 is located on the side of the existing anti-slide pile 1 away from the air surface, and it is vertically inserted into the soil layer and has a buried depth greater than that of the existing anti-slide pile. Beam 6 forms the overall structure of new and old anti-slide piles, and the newly added anti-slide pile 2 bears most of the horizontal thrust, and the connecting beam 4 transfers the remaining small part of the horizontal thrust to the existing anti-slide pile 1, forming The existing anti-slide pile 1 and the newly-added anti-slide pile 2 are jointly stressed, and at the same time, the top of the newly-added anti-slide pile is buried to hide the new anti-slide pile, so that the overall structure is simple and beautiful.

Referring to Figure 2, the connecting beams of the new and old anti-slide piles are parallel to each other, and the new anti-slide piles are connected with the existing anti-slide piles in a staggered manner.

A construction method for slope reinforcement and support structure, comprising the following steps:

Excavate the front and rear rows of anti-slide piles to fill the soil platform, the excavation depth is about 1.0m, and the lock is arranged 1.0m below the existing ground;

Digging pile holes for new anti-slide piles at a predetermined distance behind the existing anti-slide piles;

Put the reinforcement cage into the pile hole of the newly added anti-slide pile, and pour concrete into the newly added anti-slide pile;

When the strength of the newly added anti-slide pile meets the specification requirements, the soil between the new pile and the original anti-slide pile will be excavated to a depth of 3.0m, and bagged sand and gravel will be used for replacement.

After the replacement and filling is completed, the construction of the crown beam and the connecting beam will be carried out. Firstly, the steel bars of the crown beam will be bound between the new anti-slide piles and poured to form the crown beam, and the new anti-slide piles will be connected. Bind the tie beam reinforcement at the preset position of the anti-slide pile and pour to form the tie beam;

When the overall strength meets the specified requirements, fill and bury the top of the new anti-slide pile, and finally complete the construction.

Example:

This example comes from the landslide in Shitai Township Township, which mainly developed in Quaternary remnant and slope accretion silty clay and artificial filling. According to the investigation and interview, the landslide in Shitai Township Township deformed violently during the heavy rainfall in July 2018, which caused the settlement of the backfill of the anti-slide pile-slab wall and the displacement of the anti-slide pile-slab wall.

In July 2018, heavy rains fell in Shitai Township, the soil behind the pile was nearly saturated, and the groundwater drainage was not smooth, which led to the settlement of the soil behind the pile, the earth retaining plate was tilted and dislocated, and the displacement distance was 3-5cm, and the pile body had a tilt displacement (at that time 7 anti-slide piles have been tilted, and the maximum tilt distance is 24cm). The landslide is mainly treated with pile-slab walls. There are 9 anti-slide piles in the original pile sheet wall. The cross-section of the type I anti-slide pile is 1.5×2.0m, the pile length is 17.0m, the anchorage section is 8.0m long, the load-bearing section is 9.0m long, and the pile spacing is 5.0m. There are 2 pieces in total. ; Type II anti-slide piles are 19.0m long, the anchoring section is 8.5m long, the load-bearing section is 10.5m long, and the pile spacing is 5.0m. There are 7 piles in total. According to on-site inspection, no shear cracks occurred in the anti-slide pile structure, mainly due to rigid rotation, and the deformation displacement of the pile top was too large, exceeding the original design limit of no more than 10cm for the pile top. The pile body structure of the anti-slide pile is relatively intact, no shear cracks appear, and the earth retaining plate is partially tilted, but no cracks are seen, so the earth retaining plate still has a strong supporting effect. Therefore, it is necessary to reinforce the original anti-slide pile-slab wall.

Arrange new anti-slide piles behind the original anti-slide piles to bear most of the sliding force, and connect the new anti-slide piles with the original old anti-slide piles with tie beams; The distance between the front and back of the sliding pile is 1-1.5m. The original anti-slide pile bears the soil and soil pressure between the front and rear rows of anti-slide piles, and the pile spacing is 5.0m; 6 new anti-slide piles are added, the pile length is 21.0m, the cross-sectional size is 1.5×2.0m, and the length of the embedded end is 9.6m. The newly-added anti-slide piles are connected with the existing anti-slide piles in a staggered manner, and the cross-sectional size of the connection beams is 1.5×0.8m. In order to ensure the overall stress of the anti-slide pile, a crown beam is set on the top of the pile. The cross-section of the crown beam is 2.0×0.8m. The new and old anti-slide piles form the overall structure through the connecting beam and the crown beam. By filling and burying the top of the newly added anti-slide piles, the new anti-slide piles are hidden, so that the overall structure is simple and beautiful.

The above is not any formal limitation to the utility model. Although the utility model has been disclosed by the above-mentioned examples, it is not intended to limit the utility model. Within, when the technical content disclosed above can be used to make some changes or be modified into equivalent embodiments with equivalent changes, but if they do not deviate from the content of the technical solution of the utility model, the technical essence of the utility model is used to make the above embodiments Any simple modifications, equivalent changes and modifications still belong to the scope of the technical solution of the present utility model.

Claims (2)

1. A hidden reinforcement structure system of existing anti-slide piles, including a structural system composed of existing anti-slide piles, newly added anti-slide piles, connecting beams and crown beams, characterized in that the newly added anti-slide piles Located on the side of the existing anti-slide pile away from the air surface, vertically inserted into the soil layer and its buried depth is greater than that of the existing anti-slide pile, and the new and old anti-slide piles are used to form an overall structure using connecting beams and crown beams , it can be seen from the stress of the double row of anti-slide piles that the newly added anti-slide piles bear most of the horizontal thrust, and the connecting beam transmits the remaining part of the horizontal thrust to the existing anti-slide piles, so that the existing anti-slide piles , Newly added anti-slide piles for coordinated force bearing. 2. A kind of hidden reinforcement structure system of existing anti-slide pile according to claim 1, it is characterized in that, this reinforcement system is to be reinforced on the basis of utilizing the residual strength of existing anti-slide pile, and newly added anti-slide The sliding piles are interlaced with the existing anti-sliding piles, and the new anti-sliding piles are hidden by filling the top of the newly added anti-sliding piles.

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