The invention relates to the field of pipe jacking construction, in particular to a pipe jacking construction method and aims to solve the technical problem of failure in application of pipe jacking methods in the prior art to large-gradient longitudinal curved pipe jacking construction. The method includes: constructing a working well and a receiving well; mounting construction equipment for pipe jacking construction; setting up and implementing a gyroscope guide system for pipe jacking construction; controlling a pipe jack for jacking; adopting an automatic lubricating system for lubricating and resistance reducing construction of a tunnel in pipe jacking construction; arranging an intermediate jacking station in the tunnel to increase a jacking force, wherein the intermediate jacking station is a locally and remotely controlled split intermediate jacking station; subjecting the pipe jack to cutthrough treatment. The pipe jacking construction method is applicable to large-gradient 'V'-shaped longitudinal curved pipe jacking construction.

Pipe jacking construction method

The invention relates to the technical field of tunnel building, and particularly relates to a closed pre-support tunnel structure. The closed pre-support tunnel structure comprises an annular pipe curtain structure which surrounds the outer side of a to-be-excavated tunnel limit; and the pipe curtain structure comprises a plurality of steel pipes which are distributed along the axis of a tunnel, the plurality of steel pipes are distributed along the circumferential direction of the tunnel at intervals and surround the outer side of the tunnel to form an annular structure, and the adjacent steel pipes are connected with through a steel plate to form a closed annular pre-support structure. According to the closed pre-support tunnel structure, the structure is simple, the construction is convenient, the stable tunnel excavating pre-support can be formed, the closed pre-support tunnel structure is beneficial to the rapid excavation of the tunnel, secondary lining is not needed, the construction cost is lowered, and the closed pre-support tunnel structure has great promotion values.

Closed pre-support tunnel structure

The invention discloses a method for horizontal dynamic controlled-freezing water stopping between pipe roofs. The method comprises the steps that temperature measuring pipes are arranged in top pipes; a controlled-freezing pipeline system is laid in the top pipes; the controlled freezing pipeline system is connected with a freezing device; controlled-freezing operation is conducted on soil between the top pipes, and a waters-stopping frozen curtain is formed between the top pipes; after the requirement for water stopping does not exist between the top pipes, soil is unfrozen, and thaw settlement track grouting is conducted. The method for horizontal dynamic controlled-freezing water stopping between the pipe roofs has the advantages that the water stopping effect is good, the influence to the water surface is small, safety and reliability are achieved, and operation is easy and convenient. In addition, the method can be adopted in the severe complicated and special geological conditions with soft soil, high-pressure water and the like, so that the environment adaptability is high, and the method is particularly suitable for water stopping construction between the pipe roofs in the section where a building is arranged or the surface requirement is strict under the complicated geographical conditions.

Method for horizontal dynamic controlled-freezing water stopping between pipe roofs

The invention discloses a slurry-balanced pipe jacking machine receiving device under a high water condition and a slurry-balanced pipe jacking machine receiving technology under the high water condition, wherein a steel brush is adopted as a first water stopping curtain for a pressed receiving chamber, so that the pressed receiving chamber has enough pressure bearing capability to bear the water-earth pressure from the outer wall of a pipe joint, and water loss and soil erosion are prevented; a rubber water stopping curtain is adopted as a second water stopping curtain; Marithan is injected between the two water stopping curtains for closing the water connection between a pipe jacking machine and a stratum; cement paste is injected between the outer wall of the pipe joint and an orifice pipe, so that the effect that water leakage is prevented after the chamber is opened is achieved, and the operation of receiving the pipe jacking machine is successfully completed. Compared with the prior art, the slurry-balanced pipe jacking machine receiving device under the high water condition and the slurry-balanced pipe jacking machine receiving technology under the high water condition have the advantages that the water leakage and permeation accidents in the working process of a slurry-balanced pipe jacking machine can be effectively prevented, and the safety of technological implementation is largely improved.

Slurry-balanced pipe jacking machine receiving device and technology under high water condition

The invention discloses a multi-step multi-guide-hole construction organization method. The method comprises: step one, carrying out advanced supporting by using pipe roofing combined with a freezingconstruction process and a grouting method; step two, carrying out excavation of a first-step guide hole; step three, carrying out excavation of a second-step guide hole; step four, carrying out excavation of a third-step guide hole; step five, carrying out excavation of a fourth-step guide hole; and step six, carrying out excavation of a fifth-step guide hole. According to the multi-step multi-guide-hole construction organization method provided by the invention, on the basis of an eighteen-word-based principle including advanced management, strict grouting, short excavation, strong support,fast closing, and diligent measurement, the method is scientific and reasonable and has high safety and reliability. Construction of all steps of all guide holes is prompted coordinately in order, sothat the construction interference is reduced, the resources are configured reasonably, and the construction organization efficiency is improved.

Multi-step multi-guide-hole construction organization method

The invention discloses a long-distance curved jacking pipe and pipe roof construction technique. The construction technique is characterized by comprising the following steps: (1) preparation, that is, the model of construction equipment is selected; (2) measuring and positioning are carried out to determine a construction position; (3) a jacking pipe platform is erected; (4) a tunnel portal is exploded, and a tunnel portal water stop device is mounted; (5) a jacking back is mounted; (6) after mounting and debugging, a pipe jacking machine enters a tunnel for jacking, and exits from the tunnel for receiving after the jacking is completed; step (6) is then repeated until a pipe roof is formed; (7) displaced grouting filling is carried out, so as to complete the pipe roof construction. The long-distance curved jacking pipe and pipe roof construction technique provided by the invention can overcome the defects of the conventional technique, and improve the pipe roof construction quality.

Long-distance curved jacking pipe and pipe roof construction technique

The invention relates to a tube push bench receiving device and method under the high-water-pressure condition. The device comprises an orifice tube, a flange tube, a steel sleeve receiving cabin, a vent valve, a pressure stabilizing tube, a pressure stabilizing cabin, a pressure gauge, a drain valve and an overflowing valve, wherein the orifice tube, the flange tube, the steel sleeve receiving cabin and the pressure stabilizing cabin are sequentially connected, the vent valve is installed on the steel sleeve receiving cabin, and the pressure stabilizing tube, the pressure gauge, the drain valve and the overflowing valve are installed on a pressure stabilizing cabin body. Y-shaped sealing rubber rings are installed at the two ends of the flange tube, have a good sealing effect and are used for eliminating the water and thick liquid leaking problems caused by stratum high-water-pressure conditions when a tube push bench is received. The method is based on the slurry balance principle, the slurry pressure in the steel sleeve receiving cabin and the stratum water and soil pressure are kept balanced by adjusting the pressure of gas in the pressure stabilizing cabin, and the tube push bench is safely and reliably received. By means of the application of the device and the method, the reinforcing and rainfall construction of a soil body at the receiving end can be removed, the device is recycled, and the construction cost is reduced.

Tube push bench receiving device and method under high-water-pressure condition

The invention discloses a five-step fourteen-portion excavation method under an advanced and strengthened support system. A large section of a tunnel is divided into five steps and fourteen portions for excavation; initial support adopts 22b I-shaped steel, the spacing is 30cm, and the thickness of C25 sprayed concrete is 30cm; and temporary support adopts HW 400x400x13 steel, the spacing is 1.2m,a first row horizontal support and all vertical supports are splice in two, and a second row horizontal support, a third row horizontal support and a fourth row horizontal support are single. The five-step fourteen-portion excavation method under the advanced and strengthened support system has the beneficial effects that an excavation cross section of a first layer pilot tunnel is large, and mechanized excavation construction is facilitated; the excavation processes is reasonable, the frozen soil strength is high, the stability is good, and it is ensured that the tunnel face is stable and safe in structural force; a middle pilot tunnel is excavated in advance to weaken frozen earth on two sides of the pilot tunnel, the excavation difficulty of the frozen earth is reduced, and the construction efficiency is improved; the middle pilot tunnel only has a temporary support process, and the construction speed is high; reasonable monitoring and measurement arrangement can effectively monitor the risks of excavation and effectively guide the dynamic construction in the excavation process; and the five-step fourteen-portion excavation method is safe and reliable, and can effectively reduce the risks of instability, collapse, excessive deformation of a support system and the like of the tunnel face.

Five-step fourteen-portion excavation method under advanced and strengthened support system

The invention discloses a construction method for one-time horizontal backfill of concrete in a pipe roofing steel pipe. First blocking steel plates are welded to the two ends of pipe roofing, an infusion hole is reserved in the middle of the first blocking steel plate, exhaust holes are reserved in the upper portion of the first blocking steel plate, and an exhaust hole and a grouting hole are reserved in a grouting end. An infusion valve is mounted at a pumping end. A pumping pipeline and pumping equipment are arranged and fixed from the pumping end to the rear side. The pumping equipment isutilized for pumping self-compaction micro-expansion concrete into the pipe roofing from the pumping end, the exhaust hole of the grouting end is opened, and pumping pressure is monitored in real time; and after grout is discharged out from the exhaust hole of the grouting end, pumping of the self-compaction micro-expansion concrete is stopped, and the infusion valve and the exhaust hole are closed. According to the construction method for one-time horizontal backfill of the concrete in the pipe roofing steel pipe adopting the above technology, a series of technical problems that pipelines inlong-distance large-diameter curve steel pipes are staggered complexly, longitudinal gradient is small, and horizontal pipeline concrete backfill is hard are solved, and a safe, reliable, efficient,economical and practical filling technology is provided.

Construction method for one-time horizontal backfill of concrete in pipe roofing steel pipe

The utility model discloses an under-pressure receiving cabin for a slurry balance pipe jacking machine. The under-pressure receiving cabin for the slurry balance pipe jacking machine comprises a front cabin, a middle cabin, a back cabin and a receiving cabin base, wherein the front cabin, the middle cabin and the back cabin are respectively formed by coiling and welding steel plates, the front cabin is provided with rubber water stop curtain cloth and a rubber inflating water stop bag, the middle cabin is provided with a guide plate, the back cabin is provided with a slurry discharging hole, a pressure relieving pipe and a guide plate, the front cabin, the middle cabin and the back cabin are in end-to-end connection, an integral sealed container is formed, then, the integrally sealed container is fixedly arranged on the receiving cabin base, the front cabin is connected with a receiving hole opening pipe screw bolts, then, the front cabin, the middle cabin and the back cabin form a sealed integrated body, the machine head state is regulated by the pipe jacking machine, the receiving is achieved in a good state, the pipe jacking machine breaks a hole door wall to enter the receiving cabin, the upper half circle of the receiving cabin is opened after the receiving completion, concrete and silt in the receiving cabin are cleaned, the pipe jacking machine receiving construction is completed, the pipe jacking machine is received under the condition that sufficient pressure exists inside the receiving cabin, and the problems of water bursting and sand bursting due to the influence on the receiving cabin by geological conditions, steel sleeve deformation through being pressured, and the like can be avoided.

Under-pressure receiving cabin for slurry balance pipe jacking machine

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Li Gang

Author Tools

Chat about Author