阅读说明：本技术 人工挖孔桩预加固护壁结构及施工工艺 (Pre-reinforcing retaining wall structure of manual hole digging pile and construction process ) 是由 封志军 王毅敏 薛元 姚裕春 李安洪 肖朝乾 曾锐 刘菀茹 牟迪 李国栋 于 2020-04-30 设计创作，主要内容包括：本发明公开了人工挖孔桩预加固护壁结构及施工工艺,包括多个加固管和多组预制腰梁,多组预制腰梁沿桩井深度方向间隔设置在桩井内壁,多个加固管沿桩井周向方向间隔设置在桩井的内壁,加固管与预制腰梁固定连接,加固管内浇筑有填料。通过上述结构,腰梁和加固管为预制结构件,加固管在桩井施工前就插在桩井周边对桩井形成预加固,预制腰梁和加固管连接成整体框架对桩井进行防护,可在桩井内部快速安装,不需要在桩井内绑扎钢筋、立模拆模以及浇筑混凝土,不会对桩井的施工造成影响,桩井开挖可连续实施,提高了施工效率,加固管内浇筑填料增加了承载能力,确保施工的安全性和稳定性。(The invention discloses a pre-reinforcing retaining wall structure of an artificial hole digging pile and a construction process, wherein the pre-reinforcing retaining wall structure comprises a plurality of reinforcing pipes and a plurality of groups of prefabricated waist beams, the plurality of groups of prefabricated waist beams are arranged on the inner wall of a pile well at intervals along the depth direction of the pile well, the plurality of reinforcing pipes are arranged on the inner wall of the pile well at intervals along the circumferential direction of the pile well, the reinforcing pipes are fixedly connected with the prefabricated waist beams, and fillers are poured in the reinforcing pipes. Through the structure, waist rail and reinforced pipe are prefabricated structure, the reinforced pipe just inserts the stake well periphery before the construction of stake well and forms the pre-reinforcement to the stake well, prefabricated waist rail and reinforced pipe connect into overall framework and protect the stake well, can install fast in the inside of stake well, need not ligature reinforcing bar in the stake well, the formwork erection stripping and concreting, can not cause the influence to the construction of stake well, the excavation of stake well can be implemented in succession, construction efficiency is improved, it has increased bearing capacity to pour the filler in the reinforced pipe, ensure the security and the stability of construction.)

1. The pre-reinforced retaining wall structure of the manual hole digging pile is characterized by comprising a plurality of reinforcing pipes (4) and a plurality of groups of prefabricated waist beams;

the multiple groups of prefabricated waist beams are arranged on the inner wall of the pile well (1) at intervals along the depth direction of the pile well (1);

the reinforcing pipes (4) are arranged on the inner wall of the pile well (1) at intervals along the circumferential direction of the pile well (1), and the reinforcing pipes (4) are fixedly connected with the prefabricated waist beam;

and the filler is poured in the reinforcing pipe (4).

2. The structure of the pre-reinforced retaining wall of the manual hole digging pile as claimed in claim 1, wherein the pile well (1) is of a rectangular structure, one set of the prefabricated wales comprises two short-side wales (2) and two long-side wales (3), the two short-side wales (2) and the two long-side wales (3) are respectively fixedly connected into a rectangular structure along the circumferential direction of the pile well (1), and the reinforcing pipes (4) are arranged at intervals along the circumferential direction of the pile well (1).

3. The pre-reinforced retaining wall structure for the artificial dug pile as claimed in claim 1, wherein the pile well (1) is of a circular structure, the prefabricated wale comprises an annular wale (8), the annular wale (8) is fixedly connected with the reinforcing pipes (4), and the reinforcing pipes (4) are arranged at intervals along the circumferential direction of the pile well (1).

4. The pre-reinforced retaining wall structure of an artificial dug pile according to any one of claims 2 to 3, further comprising a pile well locking notch (7), wherein the pile well locking notch (7) is fixed at the wellhead of the pile well (1).

5. The pre-reinforced retaining wall structure for artificial dug piles according to claim 4, wherein the top of the reinforcing pipe (4) is fixedly connected with the pile well locking notch (7).

6. The pre-reinforced retaining wall structure of the manual hole digging pile as claimed in claim 4, further comprising a cross brace (5), wherein two ends of the cross brace (5) are respectively fixedly connected with the set of prefabricated wales.

7. The pre-reinforced retaining wall structure for artificial dug piles according to claim 6, wherein the wales (5) comprise steel wales.

8. The pre-reinforced retaining wall structure for artificial dug piles according to claim 4, wherein the bottom of the pile well (1) is poured with bottom sealing concrete (6), and the bottom sealing concrete (6) is attached to the reinforced pipes (4).

9. The pre-reinforced retaining wall structure for the manual bored pile according to claim 4, wherein the reinforcing pipes (4) are steel pipes, the filler is cement mortar, the precast wale includes a steel wale, and the reinforcing pipes (4) are welded to the precast wale.

10. The construction process of the pre-reinforced retaining wall structure of the manual hole digging pile is characterized by comprising the following steps of:

s1: inserting and driving reinforcing pipes (4) along the circumferential direction of the design position of the pile well (1);

s2: pouring filler in the reinforcing pipe (4);

s3: constructing a pile well locking opening (7), wherein the top of the reinforcing pipe (4) is fixedly connected with the pile well locking opening (7);

s4: excavating a pile well (1);

s5: mounting the prefabricated waist beam, and fixedly connecting the prefabricated waist beam with the reinforcing pipe (4);

s6: installing a cross brace (5), and fixedly connecting the cross brace (5) with the prefabricated waist rail;

s7: repeating the steps S4 to S6 until the pile bottom is designed to be high;

s8: and pouring the bottom sealing concrete (6).

Technical Field

The invention relates to the field of civil engineering, in particular to a pre-reinforced retaining wall structure of an artificial dug pile and a construction process.

Background

In China, the manual hole digging pile has the characteristics of convenient construction, no need of large-scale mechanical equipment, small interference of construction to the surrounding environment and the like, and is widely applied to the engineering fields of highways, railways and the like. In the construction process, in order to prevent accidents such as collapse of pile wells and water penetration from threatening the safety of underground personnel, a concrete retaining wall is mostly adopted for protection. And (3) generally binding reinforcing steel bars underground after 2m of excavation, erecting a formwork, casting a retaining wall in situ, removing the formwork after the concrete of the retaining wall reaches the strength, continuing the excavation work of the pile well, and circulating the steps until the designed elevation of the pile bottom is reached. When the geological conditions are poor, the excavation cycle is shortened to 0.5-1.0 m.

The concrete retaining wall structure is implemented after the pile well is excavated, and belongs to a passive pile well supporting structure. In construction, pile well excavation and underground retaining wall are mutually influenced, and both the pile well excavation and the underground retaining wall cannot be continuously operated. The time interval of pile well excavation needs at least 3-7 days, and the construction of each section of protective wall can only be carried out until the excavation of the section of pile well is completed, so that the efficiency is low, the construction period is long, and the interference is large. In a section with extremely complex geological conditions, manual hole digging pile construction is adopted, such as a sand layer, a broken rock stratum, expansive soil, a soft soil stratum and the like, so that not only is pile well excavation difficult, but also concrete retaining walls are difficult to form, and even in the excavation process, the retaining walls with the finished upper parts are also subjected to wall back-hollowing, so that the great hidden danger of integral wall down-draught is caused, and the underground operation safety is seriously influenced.

Disclosure of Invention

The invention aims to: aiming at the problems of low work efficiency, high risk and the like of the existing retaining wall structure of the manual hole digging pile in the prior art, the pre-reinforced retaining wall structure of the manual hole digging pile and the construction process are provided.

In order to achieve the purpose, the invention adopts the technical scheme that:

the pre-reinforced retaining wall structure of the manual hole digging pile comprises a plurality of reinforcing pipes and a plurality of groups of prefabricated waist beams;

the multiple groups of prefabricated waist beams are arranged on the inner wall of the pile well at intervals along the depth direction of the pile well;

the reinforcing pipes are arranged on the inner wall of the pile well at intervals along the circumferential direction of the pile well and fixedly connected with the prefabricated waist beam;

and the reinforcing pipe is internally poured with filler.

Through the structure, waist rail and reinforced pipe are prefabricated structure, the reinforced pipe just inserts the stake well periphery before the construction of stake well and forms the pre-reinforcement to the stake well, prefabricated waist rail and reinforced pipe connect into overall framework and prevent protecting the stake well, can install fast in the inside of stake well, need not ligature reinforcing bar in the stake well, the formwork erection is demolished and concrete is pour, can not cause the influence to the construction of stake well, stake well excavation can be implemented in succession, construction efficiency is improved, it has increased bearing capacity to pour the filler in the reinforced pipe, ensure the security and the stability of construction.

As a preferred scheme of the invention, the pile well is of a rectangular structure, the group of prefabricated waist beams comprises two short-side waist beams and two long-side waist beams, the two short-side waist beams and the two long-side waist beams are respectively and fixedly connected into the rectangular structure along the circumferential direction of the pile well, and the reinforcing pipes are arranged at intervals along the circumferential direction of the pile well. Through above-mentioned structure, prefabricated waist rail is fixed to be connected and is formed holistic rectangle frame construction and protect the stake well, avoids causing the influence to the construction of stake well, reduces stake well excavation risk.

As the preferred scheme of the invention, the pile well is of a circular structure, the prefabricated waist beam comprises an annular waist beam, the annular waist beam is fixedly connected with the reinforcing pipes, and the reinforcing pipes are arranged at intervals along the circumferential direction of the pile well. Through above-mentioned structure, annular waist roof beam forms annular frame structure and protects the stake well, avoids causing the influence to the construction of stake well, reduces the stake well excavation risk.

As the preferable scheme of the invention, the pre-reinforced retaining wall structure of the manual hole digging pile further comprises a pile well locking opening, and the pile well locking opening is fixed at the mouth of the pile well. Through above-mentioned structure, avoid the stake well head to collapse.

As a preferable scheme of the invention, the top of the reinforcing pipe is fixedly connected with the locking opening of the pile well. Through above-mentioned structure, make the reinforcement pipe and stake well fore shaft link together, increase stability.

As the preferable scheme of the invention, the pre-reinforced retaining wall structure of the manual hole digging pile further comprises a cross brace, and two ends of the cross brace are respectively fixedly connected with a group of prefabricated wales. Through above-mentioned structure, the stull is arranged in reducing the deformation of stake well excavation process.

As a preferable aspect of the present invention, the wale includes a steel wale.

As a preferable scheme of the invention, the bottom of the pile bottom is poured with the bottom sealing concrete, and the bottom sealing concrete is attached to the reinforcing pipe. Through the structure, the bottom sealing treatment is carried out on the pile well.

As the preferred scheme of the invention, the reinforcing pipe is a steel pipe, the filler is cement mortar, the prefabricated waist rail comprises a steel waist rail, and the reinforcing pipe is welded with the prefabricated waist rail.

The construction process of the pre-reinforced retaining wall structure of the manual hole digging pile comprises the following steps:

s1: inserting and driving reinforcing pipes along the circumferential direction of the designed position of the pile well;

s2: pouring a filler in the reinforcing pipe;

s3: constructing a pile well locking opening, wherein the top of the reinforcing pipe is fixedly connected with the pile well locking opening;

s4: excavating a pile well;

s5: mounting the prefabricated waist beam, and fixedly connecting the prefabricated waist beam with the reinforcing pipe;

s6: installing a cross brace, and fixedly connecting the cross brace with the prefabricated waist rail;

s7: repeating the steps S4 to S6 until the pile bottom is designed to be high;

s8: and pouring bottom sealing concrete.

The construction process is used for effectively realizing the function of pre-reinforcing the retaining wall structure of the manual hole digging pile, can be quickly installed in the pile well, improves the construction efficiency, cannot cause interference to the construction of the pile well, and can be continuously implemented in the excavation of the pile well.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. waist rail and reinforced pipe are prefabricated structure, the reinforced pipe just inserts the stake well periphery before the construction of stake well and forms the pre-reinforcement to the stake well, prefabricated waist rail and reinforced pipe connect into overall framework and protect the stake well, can install fast in stake well inside, need not ligature reinforcing bar in the stake well, the formwork stripping and concreting found, can not cause the influence to the construction of stake well, the excavation of stake well can be implemented in succession, construction efficiency is improved, the reinforced pipe is built to pack and has increased bearing capacity, ensure the security and the stability of construction.

2. The construction process is used for effectively realizing the function of the pre-reinforcing retaining wall structure of the manual hole digging pile, can be quickly installed in the pile shaft, improves the construction efficiency, cannot cause interference to the construction of the pile shaft, and can be continuously implemented in the excavation of the pile shaft.

Drawings

Fig. 1 is a schematic plan view of a pre-reinforced retaining wall structure of an artificial dug pile according to the present invention.

Fig. 2 is a cross-sectional view taken along a-a of fig. 1.

Fig. 3 is a schematic plan view of a pre-reinforced retaining wall structure when the artificial dug pile well according to the present invention is in a circular structure.

Icon: 1-pile well; 2-short side wale; 3-long side wale; 4-reinforcing the pipe; 5-horizontal bracing; 6-bottom sealing concrete; 7-locking the pile well; 8-ring-shaped waist beam.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.