Deep-foundation-pit pile-anchor supporting system with anchor heads arranged on pile bodies and implementing method of system

A deep foundation pit and pile body technology, which is applied in excavation, infrastructure engineering, construction, etc., can solve the problems of prestress loss, poor safety, and many processes, avoiding prestress loss, short construction period, and good integrity. Effect

Active Publication Date: 2017-03-15
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a deep foundation pit pile-anchor support system and its implementation method in which the anchor head is placed on the pile body, so as to solve the prestress loss caused by the deformation of the waist beam existing in the pile-anchor support system problems, as well as disadvantages such as poor safety, high cost, many processes, and long construction period, to achieve the purpose of improving the overall safety of the pile-anchor support system, reducing the cost, simplifying the construction process and shortening the construction period

Method used

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  • Deep-foundation-pit pile-anchor supporting system with anchor heads arranged on pile bodies and implementing method of system
  • Deep-foundation-pit pile-anchor supporting system with anchor heads arranged on pile bodies and implementing method of system
  • Deep-foundation-pit pile-anchor supporting system with anchor heads arranged on pile bodies and implementing method of system

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Embodiment approach

[0054] The implementation method of the deep foundation pit pile-anchor support system with the anchor head placed on the pile body comprises the following steps:

[0055] A, make the reinforcement cage 13 of retaining pile 1

[0056]When making the reinforcing cage 13 of retaining wall pile 1, the PVC pipe 5 that both ends are sealed with wooden plugs is preset at the design depth of the anchor rod 2 in the reinforcing cage 13, and the PVC pipe 5 is reliably connected with the reinforcing cage 13 by iron wire, so as to ensure that the PVC pipe 5 and the reinforcing cage 13 are reliably connected. The design angles of the anchor rods 2 should be kept consistent; the 5 places where the PVC pipes are preset in the reinforcement cage 13 should be treated with stirrup encryption, and the reinforcement of the retaining wall pile 1 has directionality, and the reinforcement cage 13 should be placed in strict accordance with the direction marked on the drawing.

[0057] B. Prefabricat...

example

[0076] For deep foundation pit projects with poor geological conditions, pile-anchor support systems are usually used. like Figure 6-7 As shown, the depth of the foundation pit in this example is 12.4m, and the wall retaining pile 1 used is 15m long, 0.8m in pile diameter, and 1.6m in pile spacing. Rod 2 has an inclination angle of 15°.

[0077] Fully prepare for the construction, level the working surface, excavate the loose soil layer on the surface, and measure and position the 1 pile hole of the retaining pile.

[0078] like image 3 As shown, the hole digging operation is carried out after setting out the hole position, and the steel cage 13 is made at the same time. The main reinforcement of the steel cage 13 is HRB400 steel bar, fy=400MPa; the stirrup is HPB300 steel bar, Fy=300MPa; make retaining wall piles When the reinforcement cage 13 of 1, the PVC pipe 5 that both ends are sealed with wooden plugs is preset at the design depth of the anchor rod 2 in the reinfor...

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Abstract

The invention discloses a deep-foundation-pit pile-anchor supporting system with anchor heads arranged on pile bodies and an implementing method of the system. The supporting system comprises retaining piles, anchor rods, saddle-shaped cushion blocks, anchor devices, PVC pipes, wedges and locking beams; the PVC pipes are arranged inside the retaining piles in advance; inner ends of the anchor rods penetrate through the PVC pipes and are inserted in the foundation pit wall, and outer ends of the anchor rods are fixedly connected with the anchor devices; and included angles being 15-25 degrees are formed between axes of the anchor devices and the horizontal plane and are kept consistent with inclination angles of the anchor rods. Waist beams in a traditional pile-anchor system are canceled, so that the prestress loss caused by deformation of the waist beams is avoided. The force of the anchor rods is directly transferred to the retaining piles, the anchor rods and the retaining piles can be better integrally and synergistically stressed, and a supporting structure is better in integrity, safe and reliable. A lot of connecting batten plates and welding rods are canceled, so that profile steel materials and the electricity consumption are greatly saved. Heavy and dangerous waist beam mounting work is avoided, procedures are simplified, and the construction period is shortened.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, and relates to a deep foundation pit engineering constructed with a pile-anchor support system, in particular to a deep foundation pit pile-anchor support system with an anchor head placed on a pile body and an implementation method thereof. Background technique [0002] At present, in deep foundation pit projects using pile-anchor support system construction, the connection between wall retaining piles and anchor rods (cables) generally adopts waist beams made of I-beam or channel steel to anchor the anchor rods (cables) On the waist beam, it is connected with the retaining wall pile through certain structural measures to ensure the overall coordinated force of the entire pile-anchor support system. Therefore, the waist beam plays an important role in the entire support system as a force-transmitting structure for the pre-stressing of anchor rods (cables). Waist beams are generally welde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 王海涛何永闫帅涂兵雄贾金青金慧吴锋张小浩吴跃东申佳玉
Owner DALIAN JIAOTONG UNIVERSITY
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