Construction method for rotary jet prefabricating of composite pile
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A construction method and technology of composite piles, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems that pile foundations cannot be constructed and large-scale pile foundation construction machinery cannot enter the construction site, etc.
Pending Publication Date: 2020-10-23
黑龙江辰午建筑工程有限公司
View PDF9 Cites 3 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0007] In order to solve the problem that the space between buildings and between buildings and other boundaries is narrow, large-scale pile foundation construction machinery cannot enter the
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach 1
[0029] Specific implementation mode one: as figure 1 with figure 2 As shown, the construction method of the rotary spray prefabricated composite pile of the present embodiment is realized according to the following steps:
[0030] Step 1. Use rotary jet drilling rig for rotary jet drilling:
[0031] Use rotary jet drilling rigs to carry out pile drilling construction in a narrow space;
[0032] Step two, rotary jet grouting:
[0033] During the drilling process, the rotary jet drilling rig sprays the cement slurry through the bottom of the rotary jet drilling rig bit to ensure that the cement slurry is fully stirred after filtering, and the working pressure range of the spraying grout when the rotary jet drilling rig drills in is 7 ~ 10mpa; to ensure that the rotary jet drilling rig The jet grouting pressure is 25-28Mpa when the drill bit is lifted; part of the fine sand in the cement slurry is discharged out of the pile hole along with the cement slurry, and the gap withi...
specific Embodiment approach 2
[0038] Specific embodiment 2: In step 1 of this embodiment, the grouting pressure of the grouting grout is controlled to be 2-4 mpa.
[0039] In this way, the cement slurry has the function of penetration and cementation, and the pressure injection of the cement slurry can increase the resistance of the side of the pile and the resistance of the pile end. Other components and connections are the same as those in the first embodiment.
specific Embodiment approach 3
[0040] Embodiment 3: The water-cement ratio of the cement slurry in Step 1 of this embodiment ranges from 0.5 to 0.8.
[0041] In this way, the strength of the cement slurry is guaranteed, the side resistance of the pile is improved, and the virtual soil at the bottom of the pile is solidified. Other components and connections are the same as those in the second embodiment.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a construction method for rotary jet grouting prefabricating of a composite pile, and relates to a pile foundation construction method. The method solves the problem that due to a narrow space between buildings or between a building and other boundary, a large pile foundation construction machine cannot enter a construction site, so that a pile foundation cannot be constructed. Rotary jet grouting drilling is performed by a rotary jet grouting drilling machine; rotary jet grouting of cement paste is performed in the drilling process of the rotary jet grouting drilling machine by a drill bit of the rotary jet grouting drilling machine, and part of fine-grained sand is discharged out of a hole at the bottom of the rotary jet grouting drilling machine along with the cement paste; the drill bit of the rotary jet grouting drilling machine is slowly lifted at a constant speed, and it is ensured that the lifting speed of the drill bit of the rotary jet grouting drilling machine is lower than a matched grouting amount until the drill bit of the rotary jet grouting drilling machine is completely lifted out of a drilled hole; a prefabricated pile is inserted in the drilled hole by a press or a vibration impact hammer, it is ensured that the pile continuously sinks in place, that is, the prefabricated pile sinks in the pile hole to an elevation state; and the cement paste is cured to form stone and cement so as to closely wrap the prefabricated pile to obtain the composite pile of cement soil and the prefabricated pile. The construction method is used for pilefoundation construction in a narrow space.
Description
technical field [0001] The invention relates to a construction method of a rotary spray prefabricated composite pile. Background technique [0002] With the rapid development of my country's construction industry, there are various forms of foundation, and concrete pouring piles are widely used. [0003] Previously, when a construction company in Harbin was constructing in the foundation pit, because part of the building body was constructed first, a narrow space was formed between the building body and the stairs, and between the building body and the side wall of the foundation pit, and large pile foundation construction machinery could not enter. At the construction site, the pile foundations in this part of the space and near the building cannot be constructed. This technology was invented to solve this problem. [0004] Machines with small size and high flexibility can enter narrow spaces, such as rotary jet drilling rigs, pulling machines, etc., but due to power and ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more