CN2809021Y

CN2809021Y - Prestressed counterforce system device in compression resistant static test of large tonnage foundation pile

Info

Publication number: CN2809021Y
Application number: CN 200520114928
Authority: CN
Inventors: 马晔
Original assignee: Research Institute of Highway Ministry of Transport
Current assignee: Research Institute of Highway Ministry of Transport
Priority date: 2005-07-29
Filing date: 2005-07-29
Publication date: 2006-08-23
Anticipated expiration: 2015-07-29

Abstract

The utility model relates to a prestressed counterforce system device in a compression resistant static loading test of a large tonnage foundation pile. The utility model comprises a drilled and filled anchor pile, a pile cap and a counterforce beam, wherein reinforcements are distributed in the anchor pile, the pile cap and the counterforce beam. Vertical pore canals are distributed in the anchor pile, and prestressed reinforcements are arranged in the pore canals. The top ends of the prestressed reinforcements are anchored with the pile cap and the bottoms are anchored in the anchor pile. Pore canals are distributed in the counterforce beam, and prestressed wire cables which are anchored on both ends of the counterforce beam are distributed in the pore canals. The prestressed counterforce system device in a compression resistant static loading test of a large tonnage foundation pile, which is provided by the utility model, can effectively improve the stress capability of the anchor pile and the counterforce beam, raise the testing tonnage, decrease the dimensions of the anchor pile and the counterforce beam, and reduce the difficulty and the cost of the construction.

Description

Prestressing force counter force system device in the large-tonnage foundation pile compressive static load test

Technical field

The utility model relates to the counter force system device in a kind of large-tonnage foundation pile compressive static load test.

Background technology

In field of civil engineering, foundation pile static load compression test is the design bearing capacity to pile foundation, the basic demand and the method for construction quality checking.Because the soil property proterties of various places differs, construction quality is different, therefore in order to guarantee the reliability of engineering, must carry out the foundation pile testing experiment, with test pile bearing capacity and the various designing and calculating parameters relevant, for design, construction, scientific research provide data with bearing capacity.Now the test pile method of testing of widespread usage platform method, reaction beam method are arranged, from the anchoring pile method.For the loading test of large-tonnage single pile, adopt anchoring pile reaction beam method usually.The counter force system device is set up 4 anchoring piles in the test pile vicinity as shown in Figure 1, according to the anti-pressure ability of test pile, adopts 2 anchoring piles and 1 cushion cap to form a pile foundation mostly, and each end bearing of reaction beam is on a cushion cap and affixed with cushion cap.Put at the test pile top jack, utilizes the active force and the reaction force of jack pair reaction beam, test pile is loaded, so reaction beam must be enough firm.Along with development and national economy, the bridge and the highrise building of large span day by day increase, the application of the extraordinary stake of major diameter is of common occurrence, conventional steel concrete counter force system device has been difficult to deal with existing large-tonnage test, therefore must increase the size of anchoring pile and reaction beam, costly like this and increasing difficulty of construction.

The utility model content

The purpose of this utility model is to propose a kind of counter force system device that can adapt to large-tonnage foundation pile compressive static load test.

Prestressing force counter force system device in the large-tonnage foundation pile compressive static load test that the utility model proposes, the anchoring pile, cushion cap, the reaction beam that comprise drill-pouring, be laid with plain bars in described anchoring pile, cushion cap, the reaction beam, described anchoring pile inside is furnished with the duct, described duct is vertical, is provided with prestressed reinforcement in the duct.

Described prestressed reinforcement top and cushion cap anchoring, bottom anchor is in anchoring pile.

Reaction beam inside is furnished with the duct, is furnished with prestressed steel tendon in the duct, and described steel tendon is anchored at the reaction beam two ends.

Cushion cap inside is furnished with the duct, is furnished with prestressed steel tendon in the duct, and described steel tendon is anchored at the cushion cap two ends.

Prestressing force counter force system device in the foundation pile compressive static load test that the utility model proposes can effectively increase the stress-bearing capability of anchoring pile and reaction beam, improves the test tonnage, reduces the size of anchoring pile and reaction beam, reduces difficulty of construction and construction cost.

Description of drawings

Fig. 1 is a counter force system device schematic diagram;

Fig. 2 is that reaction beam, cushion cap prestressing steel wire bunch are arranged schematic diagram;

Fig. 3 is anchoring pile and cushion cap sectional view.

Description of reference numerals:

1. reaction beam 2. cushion caps 3. anchoring piles 4. ducts

5. prestressed reinforcement or steel tendon 6. jack 7. test piles

The specific embodiment

The utility model preferred embodiment as shown in Figures 1 to 3, comprise anchoring pile, cushion cap, the reaction beam of drill-pouring, be laid with plain bars in described anchoring pile, cushion cap, the reaction beam, described anchoring pile inside is furnished with the duct, described duct is vertical, is provided with prestressed reinforcement in the duct.

Described prestressed reinforcement top and cushion cap anchoring, bottom anchor is in the concrete of anchoring pile.

Reaction beam inside is furnished with the duct, is furnished with prestressed steel tendon in the duct, and steel tendon is anchored at the reaction beam two ends.

Cushion cap inside is furnished with the duct, is furnished with prestressed steel tendon in the duct, and steel tendon is anchored at the cushion cap two ends.

Claims

1. the prestressing force counter force system device in the large-tonnage foundation pile compressive static load test, the anchoring pile, cushion cap, the reaction beam that comprise drill-pouring, be laid with plain bars in described anchoring pile, cushion cap, the reaction beam, it is characterized in that: described anchoring pile inside is furnished with the duct, described duct is vertical, is provided with prestressed reinforcement in the duct.

2. the prestressing force counter force system device in the large-tonnage foundation pile compressive static load test as claimed in claim 1 is characterized in that: described prestressed reinforcement top and cushion cap anchoring, bottom anchor is in anchoring pile.

3. the prestressing force counter force system device in the large-tonnage foundation pile compressive static load test as claimed in claim 1, it is characterized in that: reaction beam inside is furnished with the duct, is furnished with prestressed steel tendon in the duct, and described steel tendon is anchored at the reaction beam two ends.

4. the prestressing force counter force system device in the large-tonnage foundation pile compressive static load test as claimed in claim 1, it is characterized in that: cushion cap inside is furnished with the duct, is furnished with prestressed steel tendon in the duct, and described steel tendon is anchored at the cushion cap two ends.