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Pipe jacking cover excavation construction method penetrating through existing dense anchor cable area

A construction method and anchor cable technology, applied in earthwork drilling, wellbore lining, tunnel lining, etc., can solve problems such as easy entanglement, damage, jamming cutter head, etc., achieve soil filling and enrichment, widely popularize and apply, and restore road surface traffic effect

Active Publication Date: 2021-08-17
THE THIRD CONSTR CO LTD OF CTCE GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a construction method for pipe jacking and cover digging through the existing dense anchor cable area to solve the problem in the prior art that when the pipe jacking passes through the anchor cable structure, the anchor cable tendons are composed of steel strands, and the steel strands With high tensile and compressive strength and a certain degree of flexibility, it is easy to wrap around the cutter head of the pipe jacking machine, causing problems such as jamming or even damage to the cutter head, so as to improve construction safety and quickly pass through the dense anchor cable group section. pipe jacking construction

Method used

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  • Pipe jacking cover excavation construction method penetrating through existing dense anchor cable area
  • Pipe jacking cover excavation construction method penetrating through existing dense anchor cable area
  • Pipe jacking cover excavation construction method penetrating through existing dense anchor cable area

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Effect test

Embodiment 1

[0050] A construction method for pipe jacking and cap excavation across the existing dense anchor cable area, comprising the following steps:

[0051] Such as figure 1 , the construction of the rotary excavation pile 3: arrange the rotary excavation pile 3 at the structural position of the existing anchor cable 5; bury the casing 2 after the mud is prepared, raise the top of the casing 2 above the ground by a preset distance, and set a overflow at the top Slurry port; then drill holes, when the drilled holes reach the preset depth, use the original slurry change slurry method to clear the holes; then lower the reinforcement cage, connect the reserved reinforcement bars of the reinforcement cage with the roof 11 reinforcement bars, and then pour concrete to the preset Set elevation;

[0052] Ground 1 unloading: unload the undisturbed soil within the scope of the roof 11 construction surface;

[0053] Such as figure 2 and image 3 , Larsen steel sheet pile construction: Larse...

Embodiment 2

[0061] A construction method for pipe jacking and cap excavation through the existing dense anchor cable area may further specifically include the following steps:

[0062] Pre-construction preparation: According to the construction drawings and site conditions, determine the relative position of the jacking route and the existing anchor cables 5, and determine the estimated range of the dense anchor cable groups that will affect the pipe jacking construction; The number of anchor cable 5 structures encountered during pipe crossing, the number of rotary excavation piles 3, steel sheet piles 4, and the construction quantity of rotary grouting piles 8 are judged in advance; Station positioning.

[0063] Construction of the rotary excavation pile 3: arrange the rotary excavation pile 3 at the structural position of the existing anchor cable 5, and make the interval between the piles of the rotary excavation pile 3 meet the load preset requirements; after preparing the mud, bury t...

Embodiment 3

[0075] A construction method for pipe jacking and cap excavation across the existing dense anchor cable area, in actual construction, may more specifically include the following steps:

[0076] Preparation before construction: Obtain the original support design drawings of adjacent foundation pits before construction, determine the jacking route and the relative position of the existing anchor cables 5 according to the construction drawings and site conditions, and determine the possible range of dense anchor cable groups that affect pipe jacking construction ; Based on this, determine the number of anchor cable 5 structures encountered when the pipe jacking passes through in the dense anchor cable group section, and judge the number of rotary excavation piles 3, steel sheet piles 4 and the construction quantity of rotary grouting piles 8 in advance, because rotary excavation When the pile 3 is drilled, the drill bit can cut the anchor cable 5, so the position of the rotary exc...

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Abstract

The invention discloses a pipe jacking cover excavation construction method penetrating through an existing dense anchor cable area. The pipe jacking cover excavation construction method comprises the steps of rotary excavating pile construction, ground unloading, Larsen steel sheet pile construction, jet grouting pile construction, crown beam construction, top plate construction, remaining anchor cable cutting, concrete circular pipe empty pushing jacking, soil body backfilling and the like. The road traffic can be recovered as soon as possible, and anchor cable structures in the jacking pipe crossing section can be completely and thoroughly removed; a pipe jacking machine can be prevented from being clamped due to winding of steel strands, construction safety is guaranteed, the economy is reasonable, the construction efficiency is improved, and pipe jacking can penetrate through the existing anchor cable obstacle area as quickly and smoothly as possible; and the waterproof problem in a water-rich stratum in the foundation pit excavation and anchor cable breaking process can be solved, it can be guaranteed that the pipe jacking penetrates through the existing anchor cable obstacle area smoothly, reference experience is provided for pipe jacking construction to penetrate through the anchor cable area, and particularly construction experience is provided for pipe jacking construction to penetrate through the anchor cable area where the road traffic is urgently needed to be recovered.

Description

technical field [0001] The invention belongs to the technical field of pipe jacking construction, and in particular relates to a construction method for pipe jacking and cover digging through the existing dense anchor cable area. Background technique [0002] The underground pipe network is an extremely important urban infrastructure, just like the human "vascular" network, responsible for the supply of nutrients and the transfer of materials, and has become a necessary infrastructure for human survival and development. In recent years, with the continuous improvement of economic strength and the strong support of national policies, the process of urbanization has been continuously promoted, and the number and scale of cities have been continuously expanded. As a result, the functions of the original underground pipe network in the city can no longer meet the needs of the large population, resulting in traffic Congestion, environmental pollution and a series of urban problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10E21D11/15E21F17/18E21F17/00
CPCE21D9/00E21D11/10E21D11/152E21F17/18E21F17/00
Inventor 闫夫顺韩健勇贾东风王军朱兴福吴圣智王荣凯赵春鑫张华军崔震康宁
Owner THE THIRD CONSTR CO LTD OF CTCE GRP
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